Utilities/crypto/py3AES.py

Sun, 19 Jun 2011 15:19:46 +0200

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Sun, 19 Jun 2011 15:19:46 +0200
changeset 1127
b1802ebe0066
child 1509
c0b5e693b0eb
permissions
-rw-r--r--

Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.

1127
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
1 #!/usr/bin/python3
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
2 #
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
3 # aes.py: implements AES - Advanced Encryption Standard
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
4 # from the SlowAES project, http://code.google.com/p/slowaes/
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
5 #
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
6 # Copyright (c) 2008 Josh Davis ( http://www.josh-davis.org ),
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
7 # Alex Martelli ( http://www.aleax.it )
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
8 #
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
9 # Ported from C code written by Laurent Haan ( http://www.progressive-coding.com )
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
10 #
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
11 # Licensed under the Apache License, Version 2.0
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
12 # http://www.apache.org/licenses/
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
13 #
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
14
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
15 #
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
16 # Ported to Python3
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
17 #
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
18 # Copyright (c) 2011 Detlev Offenbach <detlev@die-offenbachs.de>
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
19 #
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
20
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
21 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
22 Module implementing classes for encryption according
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
23 Advanced Encryption Standard.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
24 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
25
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
26 import os
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
27 import math
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
28
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
29
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
30 def append_PKCS7_padding(b):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
31 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
32 Function to pad the given data to a multiple of 16-bytes by PKCS7 padding.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
33
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
34 @param b data to be padded (bytes)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
35 @return padded data (bytes)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
36 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
37 numpads = 16 - (len(b) % 16)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
38 return b + numpads * bytes(chr(numpads), encoding="ascii")
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
39
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
40
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
41 def strip_PKCS7_padding(b):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
42 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
43 Function to strip off PKCS7 padding.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
44
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
45 @param b data to be stripped (bytes)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
46 @return stripped data (bytes)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
47 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
48 if len(b) % 16 or not b:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
49 raise ValueError("Data of len {0} can't be PCKS7-padded".format(len(b)))
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
50 numpads = b[-1]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
51 if numpads > 16:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
52 raise ValueError("Data ending with {0} can't be PCKS7-padded".format(b[-1]))
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
53 return b[:-numpads]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
54
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
55
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
56 class AES(object):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
57 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
58 Class implementing the Advanced Encryption Standard algorithm.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
59 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
60 # valid key sizes
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
61 KeySize = {
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
62 "SIZE_128": 16,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
63 "SIZE_192": 24,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
64 "SIZE_256": 32,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
65 }
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
66
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
67 # Rijndael S-box
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
68 sbox = [0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
69 0x2b, 0xfe, 0xd7, 0xab, 0x76, 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
70 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, 0xb7,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
71 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
72 0x71, 0xd8, 0x31, 0x15, 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
73 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, 0x09, 0x83,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
74 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
75 0xe3, 0x2f, 0x84, 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
76 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, 0xd0, 0xef, 0xaa,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
77 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
78 0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
79 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0x0c, 0x13, 0xec,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
80 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
81 0x73, 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
82 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, 0xe0, 0x32, 0x3a, 0x0a, 0x49,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
83 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
84 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
85 0xea, 0x65, 0x7a, 0xae, 0x08, 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
86 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, 0x70,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
87 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
88 0x86, 0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
89 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, 0x8c, 0xa1,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
90 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
91 0x54, 0xbb, 0x16]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
92
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
93 # Rijndael Inverted S-box
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
94 rsbox = [0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
95 0x9e, 0x81, 0xf3, 0xd7, 0xfb, 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
96 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb, 0x54,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
97 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
98 0x42, 0xfa, 0xc3, 0x4e, 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
99 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25, 0x72, 0xf8,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
100 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
101 0x65, 0xb6, 0x92, 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
102 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84, 0x90, 0xd8, 0xab,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
103 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
104 0x45, 0x06, 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
105 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b, 0x3a, 0x91, 0x11, 0x41,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
106 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
107 0x73, 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
108 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e, 0x47, 0xf1, 0x1a, 0x71, 0x1d,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
109 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
110 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
111 0xfe, 0x78, 0xcd, 0x5a, 0xf4, 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
112 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f, 0x60,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
113 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
114 0x93, 0xc9, 0x9c, 0xef, 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
115 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61, 0x17, 0x2b,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
116 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
117 0x21, 0x0c, 0x7d]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
118
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
119 # Rijndael Rcon
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
120 Rcon = [0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
121 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
122 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
123 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
124 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
125 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
126 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
127 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
128 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
129 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
130 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
131 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
132 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
133 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
134 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
135 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
136 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
137 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
138 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 0x08,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
139 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
140 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
141 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
142 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
143 0xe8, 0xcb]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
144
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
145 def __getSBoxValue(self, num):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
146 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
147 Private method to retrieve a given S-Box value.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
148
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
149 @param num position of the value (integer)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
150 @return value of the S-Box (integer)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
151 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
152 return self.sbox[num]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
153
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
154 def __getSBoxInvert(self, num):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
155 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
156 Private method to retrieve a given Inverted S-Box value.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
157
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
158 @param num position of the value (integer)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
159 @return value of the Inverted S-Box (integer)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
160 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
161 return self.rsbox[num]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
162
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
163 def __rotate(self, data):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
164 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
165 Private method performing Rijndael's key schedule rotate operation.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
166
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
167 Rotate the data word eight bits to the left: eg, rotate(1d2c3a4f) == 2c3a4f1d.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
168
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
169 @param data data of size 4 (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
170 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
171 return data[1:] + data[:1]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
172
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
173 def __getRconValue(self, num):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
174 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
175 Private method to retrieve a given Rcon value.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
176
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
177 @param num position of the value (integer)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
178 @return Rcon value (integer)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
179 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
180 return self.Rcon[num]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
181
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
182 def __core(self, data, iteration):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
183 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
184 Private method performing the key schedule core operation.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
185
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
186 @param data data to operate on (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
187 @param iteration iteration counter (integer)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
188 @return modified data (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
189 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
190 # rotate the 32-bit word 8 bits to the left
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
191 data = self.__rotate(data)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
192 # apply S-Box substitution on all 4 parts of the 32-bit word
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
193 for i in range(4):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
194 data[i] = self.__getSBoxValue(data[i])
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
195 # XOR the output of the rcon operation with i to the first part
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
196 # (leftmost) only
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
197 data[0] = data[0] ^ self.__getRconValue(iteration)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
198 return data
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
199
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
200 def __expandKey(self, key, size, expandedKeySize):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
201 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
202 Private method performing Rijndael's key expansion.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
203
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
204 Expands a 128, 192 or 256 bit key into a 176, 208 or 240 bit key.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
205
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
206 @param key key to be expanded (bytes or bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
207 @param size size of the key in bytes (16, 24 or 32)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
208 @param expandedKeySize size of the expanded key (integer)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
209 @return expanded key (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
210 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
211 # current expanded keySize, in bytes
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
212 currentSize = 0
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
213 rconIteration = 1
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
214 expandedKey = bytearray(expandedKeySize)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
215
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
216 # set the 16, 24, 32 bytes of the expanded key to the input key
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
217 for j in range(size):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
218 expandedKey[j] = key[j]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
219 currentSize += size
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
220
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
221 while currentSize < expandedKeySize:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
222 # assign the previous 4 bytes to the temporary value t
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
223 t = expandedKey[currentSize - 4:currentSize]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
224
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
225 # every 16, 24, 32 bytes we apply the core schedule to t
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
226 # and increment rconIteration afterwards
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
227 if currentSize % size == 0:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
228 t = self.__core(t, rconIteration)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
229 rconIteration += 1
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
230 # For 256-bit keys, we add an extra sbox to the calculation
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
231 if size == self.KeySize["SIZE_256"] and ((currentSize % size) == 16):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
232 for l in range(4):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
233 t[l] = self.__getSBoxValue(t[l])
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
234
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
235 # We XOR t with the four-byte block 16, 24, 32 bytes before the new
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
236 # expanded key. This becomes the next four bytes in the expanded key.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
237 for m in range(4):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
238 expandedKey[currentSize] = \
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
239 expandedKey[currentSize - size] ^ t[m]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
240 currentSize += 1
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
241
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
242 return expandedKey
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
243
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
244 def __addRoundKey(self, state, roundKey):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
245 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
246 Private method to add (XORs) the round key to the state.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
247
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
248 @param state state to be changed (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
249 @param roundKey key to be used for the modification (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
250 @return modified state (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
251 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
252 buf = state[:]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
253 for i in range(16):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
254 buf[i] ^= roundKey[i]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
255 return buf
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
256
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
257 def __createRoundKey(self, expandedKey, roundKeyPointer):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
258 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
259 Private method to create a round key.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
260
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
261 @param expandedKey expanded key to be used (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
262 @param roundKeyPointer position within the expanded key (integer)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
263 @return round key (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
264 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
265 roundKey = bytearray(16)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
266 for i in range(4):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
267 for j in range(4):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
268 roundKey[j * 4 + i] = expandedKey[roundKeyPointer + i * 4 + j]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
269 return roundKey
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
270
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
271 def __galois_multiplication(self, a, b):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
272 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
273 Private method to perform a Galois multiplication of 8 bit characters a and b.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
274
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
275 @param a first factor (byte)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
276 @param b second factor (byte)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
277 @return result (byte)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
278 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
279 p = 0
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
280 for counter in range(8):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
281 if b & 1:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
282 p ^= a
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
283 hi_bit_set = a & 0x80
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
284 a <<= 1
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
285 # keep a 8 bit
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
286 a &= 0xFF
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
287 if hi_bit_set:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
288 a ^= 0x1b
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
289 b >>= 1
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
290 return p
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
291
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
292 def __subBytes(self, state, isInv):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
293 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
294 Private method to substitute all the values from the state with the value in
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
295 the SBox using the state value as index for the SBox.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
296
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
297 @param state state to be worked on (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
298 @param isInv flag indicating an inverse operation (boolean)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
299 @return modified state (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
300 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
301 state = state[:]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
302 if isInv:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
303 getter = self.__getSBoxInvert
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
304 else:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
305 getter = self.__getSBoxValue
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
306 for i in range(16):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
307 state[i] = getter(state[i])
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
308 return state
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
309
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
310 def __shiftRows(self, state, isInv):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
311 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
312 Private method to iterate over the 4 rows and call __shiftRow() with
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
313 that row.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
314
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
315 @param state state to be worked on (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
316 @param isInv flag indicating an inverse operation (boolean)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
317 @return modified state (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
318 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
319 state = state[:]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
320 for i in range(4):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
321 state = self.__shiftRow(state, i * 4, i, isInv)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
322 return state
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
323
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
324 def __shiftRow(self, state, statePointer, nbr, isInv):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
325 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
326 Private method to shift the bytes of a row to the left.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
327
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
328 @param state state to be worked on (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
329 @param statePointer index into the state (integer)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
330 @param nbr number of positions to shift (integer)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
331 @param isInv flag indicating an inverse operation (boolean)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
332 @return modified state (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
333 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
334 state = state[:]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
335 for i in range(nbr):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
336 if isInv:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
337 state[statePointer:statePointer + 4] = \
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
338 state[statePointer + 3:statePointer + 4] + \
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
339 state[statePointer:statePointer + 3]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
340 else:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
341 state[statePointer:statePointer + 4] = \
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
342 state[statePointer + 1:statePointer + 4] + \
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
343 state[statePointer:statePointer + 1]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
344 return state
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
345
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
346 def __mixColumns(self, state, isInv):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
347 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
348 Private method to perform a galois multiplication of the 4x4 matrix.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
349
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
350 @param state state to be worked on (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
351 @param isInv flag indicating an inverse operation (boolean)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
352 @return modified state (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
353 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
354 state = state[:]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
355 # iterate over the 4 columns
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
356 for i in range(4):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
357 # construct one column by slicing over the 4 rows
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
358 column = state[i:i + 16:4]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
359 # apply the __mixColumn on one column
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
360 column = self.__mixColumn(column, isInv)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
361 # put the values back into the state
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
362 state[i:i + 16:4] = column
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
363
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
364 return state
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
365
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
366 # galois multiplication of 1 column of the 4x4 matrix
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
367 def __mixColumn(self, column, isInv):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
368 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
369 Private method to perform a galois multiplication of 1 column the 4x4 matrix.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
370
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
371 @param column column to be worked on (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
372 @param isInv flag indicating an inverse operation (boolean)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
373 @return modified column (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
374 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
375 column = column[:]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
376 if isInv:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
377 mult = [14, 9, 13, 11]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
378 else:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
379 mult = [2, 1, 1, 3]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
380 cpy = column[:]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
381 g = self.__galois_multiplication
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
382
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
383 column[0] = g(cpy[0], mult[0]) ^ g(cpy[3], mult[1]) ^ \
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
384 g(cpy[2], mult[2]) ^ g(cpy[1], mult[3])
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
385 column[1] = g(cpy[1], mult[0]) ^ g(cpy[0], mult[1]) ^ \
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
386 g(cpy[3], mult[2]) ^ g(cpy[2], mult[3])
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
387 column[2] = g(cpy[2], mult[0]) ^ g(cpy[1], mult[1]) ^ \
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
388 g(cpy[0], mult[2]) ^ g(cpy[3], mult[3])
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
389 column[3] = g(cpy[3], mult[0]) ^ g(cpy[2], mult[1]) ^ \
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
390 g(cpy[1], mult[2]) ^ g(cpy[0], mult[3])
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
391 return column
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
392
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
393 def __aes_round(self, state, roundKey):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
394 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
395 Private method to apply the 4 operations of the forward round in sequence.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
396
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
397 @param state state to be worked on (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
398 @param roundKey round key to be used (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
399 @return modified state (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
400 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
401 state = self.__subBytes(state, False)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
402 state = self.__shiftRows(state, False)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
403 state = self.__mixColumns(state, False)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
404 state = self.__addRoundKey(state, roundKey)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
405 return state
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
406
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
407 def __aes_invRound(self, state, roundKey):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
408 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
409 Private method to apply the 4 operations of the inverse round in sequence.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
410
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
411 @param state state to be worked on (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
412 @param roundKey round key to be used (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
413 @return modified state (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
414 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
415 state = self.__shiftRows(state, True)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
416 state = self.__subBytes(state, True)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
417 state = self.__addRoundKey(state, roundKey)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
418 state = self.__mixColumns(state, True)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
419 return state
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
420
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
421 def __aes_main(self, state, expandedKey, nbrRounds):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
422 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
423 Private method to perform the initial operations, the standard round, and the
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
424 final operations of the forward AES, creating a round key for each round.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
425
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
426 @param state state to be worked on (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
427 @param expandedKey expanded key to be used (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
428 @param nbrRounds number of rounds to be done (integer)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
429 @return modified state (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
430 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
431 state = self.__addRoundKey(state, self.__createRoundKey(expandedKey, 0))
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
432 i = 1
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
433 while i < nbrRounds:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
434 state = self.__aes_round(
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
435 state, self.__createRoundKey(expandedKey, 16 * i))
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
436 i += 1
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
437 state = self.__subBytes(state, False)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
438 state = self.__shiftRows(state, False)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
439 state = self.__addRoundKey(
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
440 state, self.__createRoundKey(expandedKey, 16 * nbrRounds))
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
441 return state
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
442
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
443 def __aes_invMain(self, state, expandedKey, nbrRounds):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
444 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
445 Private method to perform the initial operations, the standard round, and the
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
446 final operations of the inverse AES, creating a round key for each round.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
447
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
448 @param state state to be worked on (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
449 @param expandedKey expanded key to be used (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
450 @param nbrRounds number of rounds to be done (integer)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
451 @return modified state (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
452 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
453 state = self.__addRoundKey(
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
454 state, self.__createRoundKey(expandedKey, 16 * nbrRounds))
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
455 i = nbrRounds - 1
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
456 while i > 0:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
457 state = self.__aes_invRound(
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
458 state, self.__createRoundKey(expandedKey, 16 * i))
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
459 i -= 1
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
460 state = self.__shiftRows(state, True)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
461 state = self.__subBytes(state, True)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
462 state = self.__addRoundKey(state, self.__createRoundKey(expandedKey, 0))
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
463 return state
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
464
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
465 def encrypt(self, iput, key, size):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
466 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
467 Public method to encrypt a 128 bit input block against the given key of size
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
468 specified.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
469
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
470 @param iput input data (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
471 @param key key to be used (bytes or bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
472 @param size key size (16, 24 or 32)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
473 @return encrypted data (bytes)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
474 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
475 output = bytearray(16)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
476 # the number of rounds
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
477 nbrRounds = 0
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
478 # the 128 bit block to encode
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
479 block = bytearray(16)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
480 # set the number of rounds
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
481 if size == self.KeySize["SIZE_128"]:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
482 nbrRounds = 10
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
483 elif size == self.KeySize["SIZE_192"]:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
484 nbrRounds = 12
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
485 elif size == self.KeySize["SIZE_256"]:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
486 nbrRounds = 14
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
487 else:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
488 raise ValueError("Wrong key size given ({0}).".format(size))
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
489
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
490 # the expanded keySize
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
491 expandedKeySize = 16 * (nbrRounds + 1)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
492
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
493 # Set the block values, for the block:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
494 # a0,0 a0,1 a0,2 a0,3
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
495 # a1,0 a1,1 a1,2 a1,3
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
496 # a2,0 a2,1 a2,2 a2,3
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
497 # a3,0 a3,1 a3,2 a3,3
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
498 # the mapping order is a0,0 a1,0 a2,0 a3,0 a0,1 a1,1 ... a2,3 a3,3
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
499 #
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
500 # iterate over the columns
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
501 for i in range(4):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
502 # iterate over the rows
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
503 for j in range(4):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
504 block[i + j * 4] = iput[i * 4 + j]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
505
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
506 # expand the key into an 176, 208, 240 bytes key
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
507 # the expanded key
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
508 expandedKey = self.__expandKey(key, size, expandedKeySize)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
509
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
510 # encrypt the block using the expandedKey
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
511 block = self.__aes_main(block, expandedKey, nbrRounds)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
512
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
513 # unmap the block again into the output
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
514 for k in range(4):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
515 # iterate over the rows
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
516 for l in range(4):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
517 output[k * 4 + l] = block[k + l * 4]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
518 return bytes(output)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
519
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
520 # decrypts a 128 bit input block against the given key of size specified
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
521 def decrypt(self, iput, key, size):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
522 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
523 Public method to decrypt a 128 bit input block against the given key of size
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
524 specified.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
525
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
526 @param iput input data (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
527 @param key key to be used (bytes or bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
528 @param size key size (16, 24 or 32)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
529 @return decrypted data (bytes)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
530 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
531 output = bytearray(16)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
532 # the number of rounds
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
533 nbrRounds = 0
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
534 # the 128 bit block to decode
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
535 block = bytearray(16)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
536 # set the number of rounds
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
537 if size == self.KeySize["SIZE_128"]:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
538 nbrRounds = 10
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
539 elif size == self.KeySize["SIZE_192"]:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
540 nbrRounds = 12
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
541 elif size == self.KeySize["SIZE_256"]:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
542 nbrRounds = 14
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
543 else:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
544 raise ValueError("Wrong key size given ({0}).".format(size))
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
545
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
546 # the expanded keySize
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
547 expandedKeySize = 16 * (nbrRounds + 1)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
548
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
549 # Set the block values, for the block:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
550 # a0,0 a0,1 a0,2 a0,3
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
551 # a1,0 a1,1 a1,2 a1,3
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
552 # a2,0 a2,1 a2,2 a2,3
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
553 # a3,0 a3,1 a3,2 a3,3
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
554 # the mapping order is a0,0 a1,0 a2,0 a3,0 a0,1 a1,1 ... a2,3 a3,3
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
555
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
556 # iterate over the columns
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
557 for i in range(4):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
558 # iterate over the rows
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
559 for j in range(4):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
560 block[i + j * 4] = iput[i * 4 + j]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
561 # expand the key into an 176, 208, 240 bytes key
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
562 expandedKey = self.__expandKey(key, size, expandedKeySize)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
563 # decrypt the block using the expandedKey
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
564 block = self.__aes_invMain(block, expandedKey, nbrRounds)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
565 # unmap the block again into the output
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
566 for k in range(4):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
567 # iterate over the rows
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
568 for l in range(4):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
569 output[k * 4 + l] = block[k + l * 4]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
570 return output
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
571
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
572
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
573 class AESModeOfOperation(object):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
574 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
575 Class implementing the different AES mode of operations.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
576 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
577 aes = AES()
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
578
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
579 # structure of supported modes of operation
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
580 ModeOfOperation = {
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
581 "OFB": 0,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
582 "CFB": 1,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
583 "CBC": 2,
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
584 }
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
585
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
586 def __extractBytes(self, input, start, end, mode):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
587 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
588 Private method to extract a range of bytes from the input.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
589
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
590 @param input input data (bytes)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
591 @param start start index (integer)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
592 @param end end index (integer)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
593 @param mode mode of operation (0, 1, 2)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
594 @return extracted bytes (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
595 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
596 if end - start > 16:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
597 end = start + 16
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
598 if mode == self.ModeOfOperation["CBC"]:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
599 ar = bytearray(16)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
600 else:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
601 ar = bytearray()
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
602
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
603 i = start
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
604 j = 0
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
605 while len(ar) < end - start:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
606 ar.append(0)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
607 while i < end:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
608 ar[j] = input[i]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
609 j += 1
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
610 i += 1
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
611 return ar
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
612
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
613 def encrypt(self, input, mode, key, size, IV):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
614 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
615 Public method to perform the encryption operation.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
616
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
617 @param input data to be encrypted (bytes)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
618 @param mode mode of operation (0, 1 or 2)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
619 @param key key to be used (bytes)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
620 @param size length of the key (integer)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
621 @param IV initialisation vector (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
622 @return tuple with mode of operation, length of the input and
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
623 the encrypted data (integer, integer, bytes)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
624 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
625 if len(key) % size:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
626 raise ValueError("Illegal size ({0}) for key '{1}'.".format(
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
627 size, key))
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
628 if len(IV) % 16:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
629 raise ValueError("IV is not a multiple of 16.")
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
630 # the AES input/output
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
631 iput = bytearray(16)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
632 output = bytearray()
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
633 ciphertext = bytearray(16)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
634 # the output cipher string
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
635 cipherOut = bytearray()
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
636 # char firstRound
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
637 firstRound = True
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
638 if input:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
639 for j in range(int(math.ceil(float(len(input)) / 16))):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
640 start = j * 16
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
641 end = j * 16 + 16
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
642 if end > len(input):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
643 end = len(input)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
644 plaintext = self.__extractBytes(input, start, end, mode)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
645 # print 'PT@%s:%s' % (j, plaintext)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
646 if mode == self.ModeOfOperation["CFB"]:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
647 if firstRound:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
648 output = self.aes.encrypt(IV, key, size)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
649 firstRound = False
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
650 else:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
651 output = self.aes.encrypt(iput, key, size)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
652 for i in range(16):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
653 if len(plaintext) - 1 < i:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
654 ciphertext[i] = 0 ^ output[i]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
655 elif len(output) - 1 < i:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
656 ciphertext[i] = plaintext[i] ^ 0
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
657 elif len(plaintext) - 1 < i and len(output) < i:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
658 ciphertext[i] = 0 ^ 0
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
659 else:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
660 ciphertext[i] = plaintext[i] ^ output[i]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
661 for k in range(end - start):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
662 cipherOut.append(ciphertext[k])
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
663 iput = ciphertext
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
664 elif mode == self.ModeOfOperation["OFB"]:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
665 if firstRound:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
666 output = self.aes.encrypt(IV, key, size)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
667 firstRound = False
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
668 else:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
669 output = self.aes.encrypt(iput, key, size)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
670 for i in range(16):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
671 if len(plaintext) - 1 < i:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
672 ciphertext[i] = 0 ^ output[i]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
673 elif len(output) - 1 < i:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
674 ciphertext[i] = plaintext[i] ^ 0
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
675 elif len(plaintext) - 1 < i and len(output) < i:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
676 ciphertext[i] = 0 ^ 0
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
677 else:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
678 ciphertext[i] = plaintext[i] ^ output[i]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
679 for k in range(end - start):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
680 cipherOut.append(ciphertext[k])
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
681 iput = output
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
682 elif mode == self.ModeOfOperation["CBC"]:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
683 for i in range(16):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
684 if firstRound:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
685 iput[i] = plaintext[i] ^ IV[i]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
686 else:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
687 iput[i] = plaintext[i] ^ ciphertext[i]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
688 # print 'IP@%s:%s' % (j, iput)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
689 firstRound = False
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
690 ciphertext = self.aes.encrypt(iput, key, size)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
691 # always 16 bytes because of the padding for CBC
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
692 for k in range(16):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
693 cipherOut.append(ciphertext[k])
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
694 return mode, len(input), bytes(cipherOut)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
695
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
696 # Mode of Operation Decryption
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
697 # cipherIn - Encrypted String
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
698 # originalsize - The unencrypted string length - required for CBC
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
699 # mode - mode of type modeOfOperation
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
700 # key - a number array of the bit length size
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
701 # size - the bit length of the key
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
702 # IV - the 128 bit number array Initilization Vector
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
703 def decrypt(self, cipherIn, originalsize, mode, key, size, IV):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
704 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
705 Public method to perform the decryption operation.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
706
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
707 @param input data to be encrypted (bytes)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
708 @param originalsize unencrypted string length (required for CBC)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
709 (integer)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
710 @param mode mode of operation (0, 1 or 2)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
711 @param key key to be used (bytes)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
712 @param size length of the key (integer)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
713 @param IV initialisation vector (bytearray)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
714 @return decrypted data (bytes)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
715 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
716 if len(key) % size:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
717 raise ValueError("Illegal size ({0}) for key '{1}'.".format(
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
718 size, key))
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
719 if len(IV) % 16:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
720 raise ValueError("IV is not a multiple of 16.")
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
721 # the AES input/output
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
722 ciphertext = bytearray()
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
723 iput = bytearray()
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
724 output = bytearray()
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
725 plaintext = bytearray(16)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
726 # the output bytes
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
727 bytesOut = bytearray()
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
728 # char firstRound
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
729 firstRound = True
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
730 if cipherIn != None:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
731 for j in range(int(math.ceil(float(len(cipherIn)) / 16))):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
732 start = j * 16
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
733 end = j * 16 + 16
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
734 if j * 16 + 16 > len(cipherIn):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
735 end = len(cipherIn)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
736 ciphertext = cipherIn[start:end]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
737 if mode == self.ModeOfOperation["CFB"]:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
738 if firstRound:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
739 output = self.aes.encrypt(IV, key, size)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
740 firstRound = False
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
741 else:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
742 output = self.aes.encrypt(iput, key, size)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
743 for i in range(16):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
744 if len(output) - 1 < i:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
745 plaintext[i] = 0 ^ ciphertext[i]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
746 elif len(ciphertext) - 1 < i:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
747 plaintext[i] = output[i] ^ 0
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
748 elif len(output) - 1 < i and len(ciphertext) < i:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
749 plaintext[i] = 0 ^ 0
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
750 else:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
751 plaintext[i] = output[i] ^ ciphertext[i]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
752 for k in range(end - start):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
753 bytesOut.append(plaintext[k])
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
754 iput = ciphertext
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
755 elif mode == self.ModeOfOperation["OFB"]:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
756 if firstRound:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
757 output = self.aes.encrypt(IV, key, size)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
758 firstRound = False
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
759 else:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
760 output = self.aes.encrypt(iput, key, size)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
761 for i in range(16):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
762 if len(output) - 1 < i:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
763 plaintext[i] = 0 ^ ciphertext[i]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
764 elif len(ciphertext) - 1 < i:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
765 plaintext[i] = output[i] ^ 0
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
766 elif len(output) - 1 < i and len(ciphertext) < i:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
767 plaintext[i] = 0 ^ 0
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
768 else:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
769 plaintext[i] = output[i] ^ ciphertext[i]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
770 for k in range(end - start):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
771 bytesOut.append(plaintext[k])
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
772 iput = output
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
773 elif mode == self.ModeOfOperation["CBC"]:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
774 output = self.aes.decrypt(ciphertext, key, size)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
775 for i in range(16):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
776 if firstRound:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
777 plaintext[i] = IV[i] ^ output[i]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
778 else:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
779 plaintext[i] = iput[i] ^ output[i]
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
780 firstRound = False
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
781 if originalsize is not None and originalsize < end:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
782 for k in range(originalsize - start):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
783 bytesOut.append(plaintext[k])
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
784 else:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
785 for k in range(end - start):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
786 bytesOut.append(plaintext[k])
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
787 iput = ciphertext
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
788 return bytes(bytesOut)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
789
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
790
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
791 def encryptData(key, data, mode=AESModeOfOperation.ModeOfOperation["CBC"]):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
792 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
793 Module function to encrypt the given data with the given key.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
794
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
795 @param key key to be used for encryption (bytes)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
796 @param data data to be encrypted (bytes)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
797 @param mode mode of operations (0, 1 or 2)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
798 @return encrypted data prepended with the initialization vector (bytes)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
799 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
800 key = bytearray(key)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
801 if mode == AESModeOfOperation.ModeOfOperation["CBC"]:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
802 data = append_PKCS7_padding(data)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
803 keysize = len(key)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
804 assert keysize in AES.KeySize.values(), 'invalid key size: {0}'.format(keysize)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
805 # create a new iv using random data
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
806 iv = bytearray([i for i in os.urandom(16)])
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
807 moo = AESModeOfOperation()
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
808 mode, length, ciph = moo.encrypt(data, mode, key, keysize, iv)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
809 # With padding, the original length does not need to be known. It's a bad
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
810 # idea to store the original message length.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
811 # prepend the iv.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
812 return bytes(iv) + bytes(ciph)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
813
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
814
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
815 def decryptData(key, data, mode=AESModeOfOperation.ModeOfOperation["CBC"]):
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
816 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
817 Module function to decrypt the given data with the given key.
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
818
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
819 @param key key to be used for decryption (bytes)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
820 @param data data to be decrypted (with initialization vector prepended) (bytes)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
821 @param mode mode of operations (0, 1 or 2)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
822 @return decrypted data (bytes)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
823 @exception ValueError key size is invalid or decrypted data is invalid
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
824 """
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
825 key = bytearray(key)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
826 keysize = len(key)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
827 assert keysize in AES.KeySize.values(), 'invalid key size: %s' % keysize
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
828 # iv is first 16 bytes
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
829 iv = bytearray(data[:16])
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
830 data = bytearray(data[16:])
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
831 moo = AESModeOfOperation()
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
832 decr = moo.decrypt(data, None, mode, key, keysize, iv)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
833 if mode == AESModeOfOperation.ModeOfOperation["CBC"]:
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
834 decr = strip_PKCS7_padding(decr)
b1802ebe0066 Added capability to encrypt saved passwords with a master password and rearranged some configuration parameters related to security.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
835 return bytes(decr)

eric ide

mercurial