Utilities/crypto/__init__.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 1130
3e9f0330f833
permissions
-rw-r--r--

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

1127
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1 # -*- coding: utf-8 -*-
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2
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3 # Copyright (c) 2011 Detlev Offenbach <detlev@die-offenbachs.de>
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4 #
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5
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6 """
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7 Package implementing cryptography related functionality.
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8 """
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9
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10 ##import os
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11 ##import sys
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12 ##sys.path.insert(1, os.path.join(os.path.dirname(__file__), "../.."))
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13 ##
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14 import random
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15 import base64
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16
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17 from PyQt4.QtCore import QCoreApplication
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18 from PyQt4.QtGui import QLineEdit, QInputDialog
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19
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20 from E5Gui import E5MessageBox
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21
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22 from .py3AES import encryptData, decryptData
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23 from .py3PBKDF2 import verifyPassword, hashPasswordTuple, rehashPassword
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24 ##from py3AES import encryptData, decryptData
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25 ##from py3PBKDF2 import verifyPassword, hashPasswordTuple, rehashPassword
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26
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27 import Preferences
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28
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29 ################################################################################
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30 ## password handling functions below
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31 ################################################################################
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32
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33
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34 EncodeMarker = "CE4"
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35 CryptoMarker = "CR5"
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36
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37 Delimiter = "$"
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38
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39 MasterPassword = None
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40
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41
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42 def pwEncode(pw):
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43 """
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44 Module function to encode a password.
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45
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46 @param pw password to encode (string)
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47 @return encoded password (string)
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48 """
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49 pop = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.,;:-_!$?*+#"
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50 rpw = "".join(random.sample(pop, 32)) + pw + "".join(random.sample(pop, 32))
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51 return EncodeMarker + base64.b64encode(rpw.encode("utf-8")).decode("ascii")
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52
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53
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54 def pwDecode(epw):
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55 """
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56 Module function to decode a password.
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57
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58 @param epw encoded password to decode (string)
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59 @return decoded password (string)
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60 """
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61 if not epw.startswith(EncodeMarker):
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62 return epw # it was not encoded using pwEncode
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63
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64 return base64.b64decode(epw[3:].encode("ascii"))[32:-32].decode("utf-8")
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65
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66
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67 ##def passwordHash(pw):
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68 ## """
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69 ## Module function to calculate the hash for the given password.
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70 ##
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71 ## This is done by hashing it 65.000 times with SHA1 in order to make brute force
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72 ## attacks a bit harder.
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73 ##
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74 ## @param pw password to be hashed (string)
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75 ## @return password hash (string)
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76 ## """
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77 ## hash = QCryptographicHash.hash(QByteArray(pw.encode("utf-8")),
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78 ## QCryptographicHash.Sha1)
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79 ## for i in range(65000):
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80 ## hash = QCryptographicHash.hash(hash, QCryptographicHash.Sha1)
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81 ## return base64.b64encode(bytes(hash)).decode("ascii")
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82 ##
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83 ##
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84 ##def generateCryptoKey(pw, keyLength=32):
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85 ## """
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86 ## Module function to calculate a crypto key given a password.
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87 ##
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88 ## This is done by hashing the password 32.000 times MD5 and 32.000 times with MD4.
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89 ## These hashes are concatenated and and the first bytes are taken depending on the
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90 ## desired key length.
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91 ##
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92 ## @param pw password to be used (string)
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93 ## @param keyLength length of the desired key (16, 24 or 32) (default is
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94 ## 32 bytes suitable for AES256 encryption)
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95 ## @return crypto key (bytes)
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96 ## """
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97 ## if keyLength not in [16, 24, 32]:
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98 ## raise ValueError(QCoreApplication.translate(
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99 ## "Crypto", "Illegal key length ({0}) given.").format(keyLength))
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100 ##
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101 ## hash1 = QCryptographicHash.hash(QByteArray(pw.encode("utf-8")),
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102 ## QCryptographicHash.Md5)
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103 ## hash2 = QCryptographicHash.hash(QByteArray(pw.encode("utf-8")),
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104 ## QCryptographicHash.Md4)
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105 ## for i in range(32000):
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106 ## hash1 = QCryptographicHash.hash(hash1, QCryptographicHash.Md5)
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107 ## hash2 = QCryptographicHash.hash(hash2, QCryptographicHash.Md4)
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108 ## hash = (hash1 + hash2)[:keyLength]
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109 ## return bytes(hash)
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110
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111
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112 def __getMasterPassword():
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113 """
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114 Private module function to get the password from the user.
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115 """
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116 global MasterPassword
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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117
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
118 pw, ok = QInputDialog.getText(
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
119 None,
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
120 QCoreApplication.translate("Crypto", "Master Password"),
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
121 QCoreApplication.translate("Crypto", "Enter the master password:"),
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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122 QLineEdit.Password)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
123 if ok:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
124 masterPassword = Preferences.getUser("MasterPassword")
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
125 try:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
126 if masterPassword:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
127 if verifyPassword(pw, masterPassword):
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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128 MasterPassword = pwEncode(pw)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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129 else:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
130 E5MessageBox.warning(None,
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
131 QCoreApplication.translate("Crypto", "Master Password"),
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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132 QCoreApplication.translate("Crypto",
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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133 """The given password is incorrect."""))
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
134 else:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
135 E5MessageBox.critical(None,
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
136 QCoreApplication.translate("Crypto", "Master Password"),
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
137 QCoreApplication.translate("Crypto",
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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138 """There is no master password registered."""))
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
139 except ValueError as why:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
140 E5MessageBox.warning(None,
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
141 QCoreApplication.translate("Crypto", "Master Password"),
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
142 QCoreApplication.translate("Crypto",
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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143 """<p>The given password cannot be verified.</p>"""
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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144 """<p>Reason: {0}""".format(str(why))))
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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145
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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146
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
147 def pwEncrypt(pw, masterPW=None):
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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148 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
149 Module function to encrypt a password.
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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150
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
151 @param pw password to encrypt (string)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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152 @param masterPW password to be used for encryption (string)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
153 @return encrypted password (string) and flag indicating
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
154 success (boolean)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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155 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
156 if masterPW is None:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
157 if MasterPassword is None:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
158 __getMasterPassword()
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
159 if MasterPassword is None:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
160 return "", False
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
161
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
162 masterPW = pwDecode(MasterPassword)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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163
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
164 digestname, iterations, salt, hash = hashPasswordTuple(masterPW)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
165 key = hash[:32]
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
166 try:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
167 cipher = encryptData(key, pw.encode("utf-8"))
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
168 except ValueError:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
169 return "", False
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
170 return CryptoMarker + Delimiter.join([
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
171 digestname,
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
172 str(iterations),
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
173 base64.b64encode(salt).decode("ascii"),
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
174 base64.b64encode(cipher).decode("ascii")
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
175 ]), True
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
176
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
177
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
178 def pwDecrypt(epw, masterPW=None):
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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179 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
180 Module function to decrypt a password.
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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181
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
182 @param epw hashed password to decrypt (string)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
183 @param masterPW password to be used for encryption (string)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
184 @return decrypted password (string) and flag indicating
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
185 success (boolean)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
186 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
187 if not epw.startswith(CryptoMarker):
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
188 return epw, False # it was not encoded using pwEncrypt
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
189
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
190 if masterPW is None:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
191 if MasterPassword is None:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
192 __getMasterPassword()
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
193 if MasterPassword is None:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
194 return "", False
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
195
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
196 masterPW = pwDecode(MasterPassword)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
197
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
198 hashParameters, epw = epw[3:].rsplit(Delimiter, 1)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
199 try:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
200 # recreate the key used to encrypt
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
201 key = rehashPassword(masterPW, hashParameters)[:32]
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
202 plaintext = decryptData(key, base64.b64decode(epw.encode("ascii")))
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
203 except ValueError:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
204 return "", False
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
205 return plaintext.decode("utf-8"), True
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
206
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
207
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
208 def pwReencrypt(epw, oldPassword, newPassword):
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
209 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
210 Module function to re-encrypt a password.
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
211
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
212 @param epw hashed password to re-encrypt (string)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
213 @param oldPassword password used to encrypt (string)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
214 @param newPassword new password to be used (string)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
215 @return encrypted password (string) and flag indicating
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
216 success (boolean)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
217 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
218 plaintext, ok = pwDecrypt(epw, oldPassword)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
219 if ok:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
220 return pwEncrypt(plaintext, newPassword)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
221 else:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
222 return "", False
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
223
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
224
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
225 def pwRecode(epw, oldPassword, newPassword):
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
226 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
227 Module function to re-encode a password.
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
228
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
229 In case of an error the encoded password is returned unchanged.
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
230
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
231 @param epw encoded password to re-encode (string)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
232 @param oldPassword password used to encode (string)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
233 @param newPassword new password to be used (string)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
234 @return encoded password (string)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
235 """
b1802ebe0066 Added capability to 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 if epw == "":
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
237 return epw
b1802ebe0066 Added capability to 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
b1802ebe0066 Added capability to 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 if newPassword == "":
b1802ebe0066 Added capability to 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 plaintext, ok = pwDecrypt(epw)
b1802ebe0066 Added capability to 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 return (pwEncode(plaintext) if ok else epw)
b1802ebe0066 Added capability to 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 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
243 if oldPassword == "":
b1802ebe0066 Added capability to 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 plaintext = pwDecode(epw)
b1802ebe0066 Added capability to 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 cipher, ok = pwEncrypt(plaintext, newPassword)
b1802ebe0066 Added capability to 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 return (cipher if ok else epw)
b1802ebe0066 Added capability to 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 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
248 npw, ok = pwReencrypt(epw, oldPassword, newPassword)
b1802ebe0066 Added capability to 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 return (npw if ok else epw)
b1802ebe0066 Added capability to 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
b1802ebe0066 Added capability to 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 def pwConvert(pw, encode=True):
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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253 """
b1802ebe0066 Added capability to 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 Module function to convert a plaintext password to the encoded form or
b1802ebe0066 Added capability to 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 vice versa.
b1802ebe0066 Added capability to 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 If there is an error, an empty code is returned for the encode function
b1802ebe0066 Added capability to 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 or the given encoded password for the decode function.
b1802ebe0066 Added capability to 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
b1802ebe0066 Added capability to 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 @param pw password to encode (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
261 @param encode flag indicating an encode or decode function (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
262 @return encode or decoded password (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
263 """
b1802ebe0066 Added capability to 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 if pw == "":
b1802ebe0066 Added capability to 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 return pw
b1802ebe0066 Added capability to 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
b1802ebe0066 Added capability to 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 if 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
268 # plain text -> encoded
b1802ebe0066 Added capability to 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 if Preferences.getUser("UseMasterPassword"):
b1802ebe0066 Added capability to 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 epw = pwEncrypt(pw)[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
271 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
272 epw = pwEncode(pw)
b1802ebe0066 Added capability to 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 return epw
b1802ebe0066 Added capability to 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 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
275 # encoded -> plain text
b1802ebe0066 Added capability to 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 if Preferences.getUser("UseMasterPassword"):
b1802ebe0066 Added capability to 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 plain, ok = pwDecrypt(pw)
b1802ebe0066 Added capability to 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 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
279 plain, ok = pwDecode(pw), 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
280 return (plain if ok else pw)
b1802ebe0066 Added capability to 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
b1802ebe0066 Added capability to 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
b1802ebe0066 Added capability to 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 def changeRememberedMaster(newPassword):
b1802ebe0066 Added capability to 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 """
b1802ebe0066 Added capability to 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 Module function to change the remembered master password.
b1802ebe0066 Added capability to 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
b1802ebe0066 Added capability to 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 @param newPassword new password to be used (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
288 """
b1802ebe0066 Added capability to 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 global MasterPassword
b1802ebe0066 Added capability to 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
b1802ebe0066 Added capability to 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 if newPassword == "":
b1802ebe0066 Added capability to 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 MasterPassword = 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
293 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
294 MasterPassword = pwEncode(newPassword)
b1802ebe0066 Added capability to 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
b1802ebe0066 Added capability to 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 if __name__ == "__main__":
b1802ebe0066 Added capability to 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 import sys
b1802ebe0066 Added capability to 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 from PyQt4.QtGui import QApplication
b1802ebe0066 Added capability to 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
b1802ebe0066 Added capability to 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 app = QApplication([])
b1802ebe0066 Added capability to 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
b1802ebe0066 Added capability to 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 mpw = "blahblah"
b1802ebe0066 Added capability to 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 cpw = "SomeSecret"
b1802ebe0066 Added capability to 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
b1802ebe0066 Added capability to 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 cipher, ok = pwEncrypt(cpw)
b1802ebe0066 Added capability to 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 print(ok, cipher)
b1802ebe0066 Added capability to 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 plain, ok = pwDecrypt(cipher)
b1802ebe0066 Added capability to 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 print(ok, plain)
b1802ebe0066 Added capability to 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 cipher, ok = pwEncrypt(cpw, mpw)
b1802ebe0066 Added capability to 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 print(ok, cipher)
b1802ebe0066 Added capability to 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 plain, ok = pwDecrypt(cipher, mpw)
b1802ebe0066 Added capability to 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 print(ok, plain)
b1802ebe0066 Added capability to 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 sys.exit(0)

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