Mercurial Repositories > eric / file comparison
comparison: eric6/WebBrowser/SafeBrowsing/SafeBrowsingCache.py
eric6/WebBrowser/SafeBrowsing/SafeBrowsingCache.py
- changeset 6942
- 2602857055c5
- parent 6645
- ad476851d7e0
- child 7022
- a5f9f601b6ac
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| 6941:f99d60d6b59b | 6942:2602857055c5 |
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| 1 # -*- coding: utf-8 -*- | |
| 2 | |
| 3 # Copyright (c) 2017 - 2019 Detlev Offenbach <detlev@die-offenbachs.de> | |
| 4 # | |
| 5 | |
| 6 """ | |
| 7 Module implementing a cache for Google Safe Browsing. | |
| 8 """ | |
| 9 | |
| 10 # | |
| 11 # Some part of this code were ported from gglsbl.storage and adapted | |
| 12 # to QtSql. | |
| 13 # | |
| 14 # https://github.com/afilipovich/gglsbl | |
| 15 # | |
| 16 | |
| 17 from __future__ import unicode_literals, division | |
| 18 | |
| 19 import os | |
| 20 | |
| 21 from PyQt5.QtCore import QObject, QByteArray, QCryptographicHash, \ | |
| 22 QCoreApplication, QEventLoop | |
| 23 from PyQt5.QtSql import QSql, QSqlDatabase, QSqlQuery | |
| 24 | |
| 25 from .SafeBrowsingUtilities import toHex | |
| 26 from .SafeBrowsingThreatList import ThreatList | |
| 27 | |
| 28 | |
| 29 class SafeBrowsingCache(QObject): | |
| 30 """ | |
| 31 Class implementing a cache for Google Safe Browsing. | |
| 32 """ | |
| 33 create_threat_list_stmt = """ | |
| 34 CREATE TABLE threat_list | |
| 35 (threat_type character varying(128) NOT NULL, | |
| 36 platform_type character varying(128) NOT NULL, | |
| 37 threat_entry_type character varying(128) NOT NULL, | |
| 38 client_state character varying(42), | |
| 39 timestamp timestamp without time zone DEFAULT current_timestamp, | |
| 40 PRIMARY KEY (threat_type, platform_type, threat_entry_type) | |
| 41 ) | |
| 42 """ | |
| 43 drop_threat_list_stmt = """DROP TABLE IF EXISTS threat_list""" | |
| 44 | |
| 45 create_full_hashes_stmt = """ | |
| 46 CREATE TABLE full_hash | |
| 47 (value BLOB NOT NULL, | |
| 48 threat_type character varying(128) NOT NULL, | |
| 49 platform_type character varying(128) NOT NULL, | |
| 50 threat_entry_type character varying(128) NOT NULL, | |
| 51 downloaded_at timestamp without time zone DEFAULT current_timestamp, | |
| 52 expires_at timestamp without time zone | |
| 53 NOT NULL DEFAULT current_timestamp, | |
| 54 malware_threat_type varchar(32), | |
| 55 PRIMARY KEY (value, threat_type, platform_type, threat_entry_type) | |
| 56 ) | |
| 57 """ | |
| 58 drop_full_hashes_stmt = """DROP TABLE IF EXISTS full_hash""" | |
| 59 | |
| 60 create_hash_prefix_stmt = """ | |
| 61 CREATE TABLE hash_prefix | |
| 62 (value BLOB NOT NULL, | |
| 63 cue character varying(4) NOT NULL, | |
| 64 threat_type character varying(128) NOT NULL, | |
| 65 platform_type character varying(128) NOT NULL, | |
| 66 threat_entry_type character varying(128) NOT NULL, | |
| 67 timestamp timestamp without time zone DEFAULT current_timestamp, | |
| 68 negative_expires_at timestamp without time zone | |
| 69 NOT NULL DEFAULT current_timestamp, | |
| 70 PRIMARY KEY (value, threat_type, platform_type, threat_entry_type), | |
| 71 FOREIGN KEY(threat_type, platform_type, threat_entry_type) | |
| 72 REFERENCES threat_list(threat_type, platform_type, threat_entry_type) | |
| 73 ON DELETE CASCADE | |
| 74 ) | |
| 75 """ | |
| 76 drop_hash_prefix_stmt = """DROP TABLE IF EXISTS hash_prefix""" | |
| 77 | |
| 78 create_full_hash_cue_idx = """ | |
| 79 CREATE INDEX idx_hash_prefix_cue ON hash_prefix (cue) | |
| 80 """ | |
| 81 drop_full_hash_cue_idx = """DROP INDEX IF EXISTS idx_hash_prefix_cue""" | |
| 82 | |
| 83 create_full_hash_expires_idx = """ | |
| 84 CREATE INDEX idx_full_hash_expires_at ON full_hash (expires_at) | |
| 85 """ | |
| 86 drop_full_hash_expires_idx = """ | |
| 87 DROP INDEX IF EXISTS idx_full_hash_expires_at | |
| 88 """ | |
| 89 | |
| 90 create_full_hash_value_idx = """ | |
| 91 CREATE INDEX idx_full_hash_value ON full_hash (value) | |
| 92 """ | |
| 93 drop_full_hash_value_idx = """DROP INDEX IF EXISTS idx_full_hash_value""" | |
| 94 | |
| 95 maxProcessEventsTime = 500 | |
| 96 | |
| 97 def __init__(self, dbPath, parent=None): | |
| 98 """ | |
| 99 Constructor | |
| 100 | |
| 101 @param dbPath path to store the cache DB into | |
| 102 @type str | |
| 103 @param parent reference to the parent object | |
| 104 @type QObject | |
| 105 """ | |
| 106 super(SafeBrowsingCache, self).__init__(parent) | |
| 107 | |
| 108 self.__connectionName = "SafeBrowsingCache" | |
| 109 | |
| 110 if not os.path.exists(dbPath): | |
| 111 os.makedirs(dbPath) | |
| 112 | |
| 113 self.__dbFileName = os.path.join(dbPath, "SafeBrowsingCache.db") | |
| 114 preparationNeeded = not os.path.exists(self.__dbFileName) | |
| 115 | |
| 116 self.__openCacheDb() | |
| 117 if preparationNeeded: | |
| 118 self.prepareCacheDb() | |
| 119 | |
| 120 def close(self): | |
| 121 """ | |
| 122 Public method to close the database. | |
| 123 """ | |
| 124 if QSqlDatabase.database(self.__connectionName).isOpen(): | |
| 125 QSqlDatabase.database(self.__connectionName).close() | |
| 126 QSqlDatabase.removeDatabase(self.__connectionName) | |
| 127 | |
| 128 def __openCacheDb(self): | |
| 129 """ | |
| 130 Private method to open the cache database. | |
| 131 | |
| 132 @return flag indicating the open state | |
| 133 @rtype bool | |
| 134 """ | |
| 135 db = QSqlDatabase.database(self.__connectionName, False) | |
| 136 if not db.isValid(): | |
| 137 # the database connection is a new one | |
| 138 db = QSqlDatabase.addDatabase("QSQLITE", self.__connectionName) | |
| 139 db.setDatabaseName(self.__dbFileName) | |
| 140 opened = db.open() | |
| 141 if not opened: | |
| 142 QSqlDatabase.removeDatabase(self.__connectionName) | |
| 143 else: | |
| 144 opened = True | |
| 145 return opened | |
| 146 | |
| 147 def prepareCacheDb(self): | |
| 148 """ | |
| 149 Public method to prepare the cache database. | |
| 150 """ | |
| 151 db = QSqlDatabase.database(self.__connectionName) | |
| 152 db.transaction() | |
| 153 try: | |
| 154 query = QSqlQuery(db) | |
| 155 # step 1: drop old tables | |
| 156 query.exec_(self.drop_threat_list_stmt) | |
| 157 query.exec_(self.drop_full_hashes_stmt) | |
| 158 query.exec_(self.drop_hash_prefix_stmt) | |
| 159 # step 2: drop old indices | |
| 160 query.exec_(self.drop_full_hash_cue_idx) | |
| 161 query.exec_(self.drop_full_hash_expires_idx) | |
| 162 query.exec_(self.drop_full_hash_value_idx) | |
| 163 # step 3: create tables | |
| 164 query.exec_(self.create_threat_list_stmt) | |
| 165 query.exec_(self.create_full_hashes_stmt) | |
| 166 query.exec_(self.create_hash_prefix_stmt) | |
| 167 # step 4: create indices | |
| 168 query.exec_(self.create_full_hash_cue_idx) | |
| 169 query.exec_(self.create_full_hash_expires_idx) | |
| 170 query.exec_(self.create_full_hash_value_idx) | |
| 171 finally: | |
| 172 del query | |
| 173 db.commit() | |
| 174 | |
| 175 def lookupFullHashes(self, hashValues): | |
| 176 """ | |
| 177 Public method to get a list of threat lists and expiration flag | |
| 178 for the given hashes if a hash is blacklisted. | |
| 179 | |
| 180 @param hashValues list of hash values to look up | |
| 181 @type list of bytes | |
| 182 @return list of tuples containing the threat list info and the | |
| 183 expiration flag | |
| 184 @rtype list of tuple of (ThreatList, bool) | |
| 185 """ | |
| 186 queryStr = """ | |
| 187 SELECT threat_type, platform_type, threat_entry_type, | |
| 188 expires_at < current_timestamp AS has_expired | |
| 189 FROM full_hash WHERE value IN ({0}) | |
| 190 """ | |
| 191 output = [] | |
| 192 | |
| 193 db = QSqlDatabase.database(self.__connectionName) | |
| 194 if db.isOpen(): | |
| 195 db.transaction() | |
| 196 try: | |
| 197 query = QSqlQuery(db) | |
| 198 query.prepare( | |
| 199 queryStr.format(",".join(["?"] * len(hashValues)))) | |
| 200 for hashValue in hashValues: | |
| 201 query.addBindValue(QByteArray(hashValue), | |
| 202 QSql.In | QSql.Binary) | |
| 203 | |
| 204 query.exec_() | |
| 205 | |
| 206 while query.next(): # __IGNORE_WARNING_M513__ | |
| 207 threatType = query.value(0) | |
| 208 platformType = query.value(1) | |
| 209 threatEntryType = query.value(2) | |
| 210 hasExpired = bool(query.value(3)) | |
| 211 threatList = ThreatList(threatType, platformType, | |
| 212 threatEntryType) | |
| 213 output.append((threatList, hasExpired)) | |
| 214 QCoreApplication.processEvents(QEventLoop.AllEvents, | |
| 215 self.maxProcessEventsTime) | |
| 216 del query | |
| 217 finally: | |
| 218 db.commit() | |
| 219 | |
| 220 return output | |
| 221 | |
| 222 def lookupHashPrefix(self, prefixes): | |
| 223 """ | |
| 224 Public method to look up hash prefixes in the local cache. | |
| 225 | |
| 226 @param prefixes list of hash prefixes to look up | |
| 227 @type list of bytes | |
| 228 @return list of tuples containing the threat list, full hash and | |
| 229 negative cache expiration flag | |
| 230 @rtype list of tuple of (ThreatList, bytes, bool) | |
| 231 """ | |
| 232 queryStr = """ | |
| 233 SELECT value,threat_type,platform_type,threat_entry_type, | |
| 234 negative_expires_at < current_timestamp AS negative_cache_expired | |
| 235 FROM hash_prefix WHERE cue IN ({0}) | |
| 236 """ | |
| 237 output = [] | |
| 238 | |
| 239 db = QSqlDatabase.database(self.__connectionName) | |
| 240 if db.isOpen(): | |
| 241 db.transaction() | |
| 242 try: | |
| 243 query = QSqlQuery(db) | |
| 244 query.prepare( | |
| 245 queryStr.format(",".join(["?"] * len(prefixes)))) | |
| 246 for prefix in prefixes: | |
| 247 query.addBindValue(prefix) | |
| 248 | |
| 249 query.exec_() | |
| 250 | |
| 251 while query.next(): # __IGNORE_WARNING_M513__ | |
| 252 fullHash = bytes(query.value(0)) | |
| 253 threatType = query.value(1) | |
| 254 platformType = query.value(2) | |
| 255 threatEntryType = query.value(3) | |
| 256 negativeCacheExpired = bool(query.value(4)) | |
| 257 threatList = ThreatList(threatType, platformType, | |
| 258 threatEntryType) | |
| 259 output.append((threatList, fullHash, negativeCacheExpired)) | |
| 260 QCoreApplication.processEvents(QEventLoop.AllEvents, | |
| 261 self.maxProcessEventsTime) | |
| 262 del query | |
| 263 finally: | |
| 264 db.commit() | |
| 265 | |
| 266 return output | |
| 267 | |
| 268 def storeFullHash(self, threatList, hashValue, cacheDuration, | |
| 269 malwareThreatType): | |
| 270 """ | |
| 271 Public method to store full hash data in the cache database. | |
| 272 | |
| 273 @param threatList threat list info object | |
| 274 @type ThreatList | |
| 275 @param hashValue hash to be stored | |
| 276 @type bytes | |
| 277 @param cacheDuration duration the data should remain in the cache | |
| 278 @type int or float | |
| 279 @param malwareThreatType threat type of the malware | |
| 280 @type str | |
| 281 """ | |
| 282 insertQueryStr = """ | |
| 283 INSERT OR IGNORE INTO full_hash | |
| 284 (value, threat_type, platform_type, threat_entry_type, | |
| 285 malware_threat_type, downloaded_at) | |
| 286 VALUES | |
| 287 (?, ?, ?, ?, ?, current_timestamp) | |
| 288 """ | |
| 289 updateQueryStr = """ | |
| 290 UPDATE full_hash SET | |
| 291 expires_at=datetime(current_timestamp, '+{0} SECONDS') | |
| 292 WHERE value=? AND threat_type=? AND platform_type=? AND | |
| 293 threat_entry_type=? | |
| 294 """.format(int(cacheDuration)) | |
| 295 | |
| 296 db = QSqlDatabase.database(self.__connectionName) | |
| 297 if db.isOpen(): | |
| 298 db.transaction() | |
| 299 try: | |
| 300 query = QSqlQuery(db) | |
| 301 query.prepare(insertQueryStr) | |
| 302 query.addBindValue(QByteArray(hashValue), | |
| 303 QSql.In | QSql.Binary) | |
| 304 query.addBindValue(threatList.threatType) | |
| 305 query.addBindValue(threatList.platformType) | |
| 306 query.addBindValue(threatList.threatEntryType) | |
| 307 query.addBindValue(malwareThreatType) | |
| 308 query.exec_() | |
| 309 del query | |
| 310 | |
| 311 query = QSqlQuery(db) | |
| 312 query.prepare(updateQueryStr) | |
| 313 query.addBindValue(QByteArray(hashValue), | |
| 314 QSql.In | QSql.Binary) | |
| 315 query.addBindValue(threatList.threatType) | |
| 316 query.addBindValue(threatList.platformType) | |
| 317 query.addBindValue(threatList.threatEntryType) | |
| 318 query.exec_() | |
| 319 del query | |
| 320 finally: | |
| 321 db.commit() | |
| 322 | |
| 323 def deleteHashPrefixList(self, threatList): | |
| 324 """ | |
| 325 Public method to delete hash prefixes for a given threat list. | |
| 326 | |
| 327 @param threatList threat list info object | |
| 328 @type ThreatList | |
| 329 """ | |
| 330 queryStr = """ | |
| 331 DELETE FROM hash_prefix | |
| 332 WHERE threat_type=? AND platform_type=? AND threat_entry_type=? | |
| 333 """ | |
| 334 | |
| 335 db = QSqlDatabase.database(self.__connectionName) | |
| 336 if db.isOpen(): | |
| 337 db.transaction() | |
| 338 try: | |
| 339 query = QSqlQuery(db) | |
| 340 query.prepare(queryStr) | |
| 341 query.addBindValue(threatList.threatType) | |
| 342 query.addBindValue(threatList.platformType) | |
| 343 query.addBindValue(threatList.threatEntryType) | |
| 344 query.exec_() | |
| 345 del query | |
| 346 finally: | |
| 347 db.commit() | |
| 348 | |
| 349 def cleanupFullHashes(self, keepExpiredFor=43200): | |
| 350 """ | |
| 351 Public method to clean up full hash entries expired more than the | |
| 352 given time. | |
| 353 | |
| 354 @param keepExpiredFor time period in seconds of entries to be expired | |
| 355 @type int or float | |
| 356 """ | |
| 357 queryStr = """ | |
| 358 DELETE FROM full_hash | |
| 359 WHERE expires_at=datetime(current_timestamp, '{0} SECONDS') | |
| 360 """.format(int(keepExpiredFor)) | |
| 361 | |
| 362 db = QSqlDatabase.database(self.__connectionName) | |
| 363 if db.isOpen(): | |
| 364 db.transaction() | |
| 365 try: | |
| 366 query = QSqlQuery(db) | |
| 367 query.prepare(queryStr) | |
| 368 query.exec_() | |
| 369 del query | |
| 370 finally: | |
| 371 db.commit() | |
| 372 | |
| 373 def updateHashPrefixExpiration(self, threatList, hashPrefix, | |
| 374 negativeCacheDuration): | |
| 375 """ | |
| 376 Public method to update the hash prefix expiration time. | |
| 377 | |
| 378 @param threatList threat list info object | |
| 379 @type ThreatList | |
| 380 @param hashPrefix hash prefix | |
| 381 @type bytes | |
| 382 @param negativeCacheDuration time in seconds the entry should remain | |
| 383 in the cache | |
| 384 @type int or float | |
| 385 """ | |
| 386 queryStr = """ | |
| 387 UPDATE hash_prefix | |
| 388 SET negative_expires_at=datetime(current_timestamp, '+{0} SECONDS') | |
| 389 WHERE value=? AND threat_type=? AND platform_type=? AND | |
| 390 threat_entry_type=? | |
| 391 """.format(int(negativeCacheDuration)) | |
| 392 | |
| 393 db = QSqlDatabase.database(self.__connectionName) | |
| 394 if db.isOpen(): | |
| 395 db.transaction() | |
| 396 try: | |
| 397 query = QSqlQuery(db) | |
| 398 query.prepare(queryStr) | |
| 399 query.addBindValue(QByteArray(hashPrefix), | |
| 400 QSql.In | QSql.Binary) | |
| 401 query.addBindValue(threatList.threatType) | |
| 402 query.addBindValue(threatList.platformType) | |
| 403 query.addBindValue(threatList.threatEntryType) | |
| 404 query.exec_() | |
| 405 del query | |
| 406 finally: | |
| 407 db.commit() | |
| 408 | |
| 409 def getThreatLists(self): | |
| 410 """ | |
| 411 Public method to get the available threat lists. | |
| 412 | |
| 413 @return list of available threat lists | |
| 414 @rtype list of tuples of (ThreatList, str) | |
| 415 """ | |
| 416 queryStr = """ | |
| 417 SELECT threat_type,platform_type,threat_entry_type,client_state | |
| 418 FROM threat_list | |
| 419 """ | |
| 420 output = [] | |
| 421 | |
| 422 db = QSqlDatabase.database(self.__connectionName) | |
| 423 if db.isOpen(): | |
| 424 db.transaction() | |
| 425 try: | |
| 426 query = QSqlQuery(db) | |
| 427 query.prepare(queryStr) | |
| 428 | |
| 429 query.exec_() | |
| 430 | |
| 431 while query.next(): # __IGNORE_WARNING_M513__ | |
| 432 threatType = query.value(0) | |
| 433 platformType = query.value(1) | |
| 434 threatEntryType = query.value(2) | |
| 435 clientState = query.value(3) | |
| 436 threatList = ThreatList(threatType, platformType, | |
| 437 threatEntryType) | |
| 438 output.append((threatList, clientState)) | |
| 439 QCoreApplication.processEvents(QEventLoop.AllEvents, | |
| 440 self.maxProcessEventsTime) | |
| 441 del query | |
| 442 finally: | |
| 443 db.commit() | |
| 444 | |
| 445 return output | |
| 446 | |
| 447 def addThreatList(self, threatList): | |
| 448 """ | |
| 449 Public method to add a threat list to the cache. | |
| 450 | |
| 451 @param threatList threat list to be added | |
| 452 @type ThreatList | |
| 453 """ | |
| 454 queryStr = """ | |
| 455 INSERT OR IGNORE INTO threat_list | |
| 456 (threat_type, platform_type, threat_entry_type, timestamp) | |
| 457 VALUES (?, ?, ?, current_timestamp) | |
| 458 """ | |
| 459 | |
| 460 db = QSqlDatabase.database(self.__connectionName) | |
| 461 if db.isOpen(): | |
| 462 db.transaction() | |
| 463 try: | |
| 464 query = QSqlQuery(db) | |
| 465 query.prepare(queryStr) | |
| 466 query.addBindValue(threatList.threatType) | |
| 467 query.addBindValue(threatList.platformType) | |
| 468 query.addBindValue(threatList.threatEntryType) | |
| 469 query.exec_() | |
| 470 del query | |
| 471 finally: | |
| 472 db.commit() | |
| 473 | |
| 474 def deleteThreatList(self, threatList): | |
| 475 """ | |
| 476 Public method to delete a threat list from the cache. | |
| 477 | |
| 478 @param threatList threat list to be deleted | |
| 479 @type ThreatList | |
| 480 """ | |
| 481 queryStr = """ | |
| 482 DELETE FROM threat_list | |
| 483 WHERE threat_type=? AND platform_type=? AND threat_entry_type=? | |
| 484 """ | |
| 485 | |
| 486 db = QSqlDatabase.database(self.__connectionName) | |
| 487 if db.isOpen(): | |
| 488 db.transaction() | |
| 489 try: | |
| 490 query = QSqlQuery(db) | |
| 491 query.prepare(queryStr) | |
| 492 query.addBindValue(threatList.threatType) | |
| 493 query.addBindValue(threatList.platformType) | |
| 494 query.addBindValue(threatList.threatEntryType) | |
| 495 query.exec_() | |
| 496 del query | |
| 497 finally: | |
| 498 db.commit() | |
| 499 | |
| 500 def updateThreatListClientState(self, threatList, clientState): | |
| 501 """ | |
| 502 Public method to update the client state of a threat list. | |
| 503 | |
| 504 @param threatList threat list to update the client state for | |
| 505 @type ThreatList | |
| 506 @param clientState new client state | |
| 507 @type str | |
| 508 """ | |
| 509 queryStr = """ | |
| 510 UPDATE threat_list SET timestamp=current_timestamp, client_state=? | |
| 511 WHERE threat_type=? AND platform_type=? AND threat_entry_type=? | |
| 512 """ | |
| 513 | |
| 514 db = QSqlDatabase.database(self.__connectionName) | |
| 515 if db.isOpen(): | |
| 516 db.transaction() | |
| 517 try: | |
| 518 query = QSqlQuery(db) | |
| 519 query.prepare(queryStr) | |
| 520 query.addBindValue(clientState) | |
| 521 query.addBindValue(threatList.threatType) | |
| 522 query.addBindValue(threatList.platformType) | |
| 523 query.addBindValue(threatList.threatEntryType) | |
| 524 query.exec_() | |
| 525 del query | |
| 526 finally: | |
| 527 db.commit() | |
| 528 | |
| 529 def hashPrefixListChecksum(self, threatList): | |
| 530 """ | |
| 531 Public method to calculate the SHA256 checksum for an alphabetically | |
| 532 sorted concatenated list of hash prefixes. | |
| 533 | |
| 534 @param threatList threat list to calculate checksum for | |
| 535 @type ThreatList | |
| 536 @return SHA256 checksum | |
| 537 @rtype bytes | |
| 538 """ | |
| 539 queryStr = """ | |
| 540 SELECT value FROM hash_prefix | |
| 541 WHERE threat_type=? AND platform_type=? AND threat_entry_type=? | |
| 542 ORDER BY value | |
| 543 """ | |
| 544 checksum = None | |
| 545 | |
| 546 db = QSqlDatabase.database(self.__connectionName) | |
| 547 if db.isOpen(): | |
| 548 db.transaction() | |
| 549 sha256Hash = QCryptographicHash(QCryptographicHash.Sha256) | |
| 550 try: | |
| 551 query = QSqlQuery(db) | |
| 552 query.prepare(queryStr) | |
| 553 query.addBindValue(threatList.threatType) | |
| 554 query.addBindValue(threatList.platformType) | |
| 555 query.addBindValue(threatList.threatEntryType) | |
| 556 | |
| 557 query.exec_() | |
| 558 | |
| 559 while query.next(): # __IGNORE_WARNING_M513__ | |
| 560 sha256Hash.addData(query.value(0)) | |
| 561 QCoreApplication.processEvents(QEventLoop.AllEvents, | |
| 562 self.maxProcessEventsTime) | |
| 563 del query | |
| 564 finally: | |
| 565 db.commit() | |
| 566 | |
| 567 checksum = bytes(sha256Hash.result()) | |
| 568 | |
| 569 return checksum | |
| 570 | |
| 571 def populateHashPrefixList(self, threatList, prefixes): | |
| 572 """ | |
| 573 Public method to populate the hash prefixes for a threat list. | |
| 574 | |
| 575 @param threatList threat list of the hash prefixes | |
| 576 @type ThreatList | |
| 577 @param prefixes list of hash prefixes to be inserted | |
| 578 @type HashPrefixList | |
| 579 """ | |
| 580 queryStr = """ | |
| 581 INSERT INTO hash_prefix | |
| 582 (value, cue, threat_type, platform_type, threat_entry_type, | |
| 583 timestamp) | |
| 584 VALUES (?, ?, ?, ?, ?, current_timestamp) | |
| 585 """ | |
| 586 | |
| 587 db = QSqlDatabase.database(self.__connectionName) | |
| 588 if db.isOpen(): | |
| 589 db.transaction() | |
| 590 try: | |
| 591 for prefix in prefixes: | |
| 592 query = QSqlQuery(db) | |
| 593 query.prepare(queryStr) | |
| 594 query.addBindValue(QByteArray(prefix), | |
| 595 QSql.In | QSql.Binary) | |
| 596 query.addBindValue(toHex(prefix[:4])) | |
| 597 query.addBindValue(threatList.threatType) | |
| 598 query.addBindValue(threatList.platformType) | |
| 599 query.addBindValue(threatList.threatEntryType) | |
| 600 query.exec_() | |
| 601 del query | |
| 602 QCoreApplication.processEvents(QEventLoop.AllEvents, | |
| 603 self.maxProcessEventsTime) | |
| 604 finally: | |
| 605 db.commit() | |
| 606 | |
| 607 def getHashPrefixValuesToRemove(self, threatList, indexes): | |
| 608 """ | |
| 609 Public method to get the hash prefix values to be removed from the | |
| 610 cache. | |
| 611 | |
| 612 @param threatList threat list to remove prefixes from | |
| 613 @type ThreatList | |
| 614 @param indexes list of indexes of prefixes to be removed | |
| 615 @type list of int | |
| 616 @return list of hash prefixes to be removed | |
| 617 @rtype list of bytes | |
| 618 """ | |
| 619 queryStr = """ | |
| 620 SELECT value FROM hash_prefix | |
| 621 WHERE threat_type=? AND platform_type=? AND threat_entry_type=? | |
| 622 ORDER BY value | |
| 623 """ | |
| 624 indexes = set(indexes) | |
| 625 output = [] | |
| 626 | |
| 627 db = QSqlDatabase.database(self.__connectionName) | |
| 628 if db.isOpen(): | |
| 629 db.transaction() | |
| 630 try: | |
| 631 query = QSqlQuery(db) | |
| 632 query.prepare(queryStr) | |
| 633 query.addBindValue(threatList.threatType) | |
| 634 query.addBindValue(threatList.platformType) | |
| 635 query.addBindValue(threatList.threatEntryType) | |
| 636 | |
| 637 query.exec_() | |
| 638 | |
| 639 index = 0 | |
| 640 while query.next(): # __IGNORE_WARNING_M513__ | |
| 641 if index in indexes: | |
| 642 prefix = bytes(query.value(0)) | |
| 643 output.append(prefix) | |
| 644 index += 1 | |
| 645 QCoreApplication.processEvents(QEventLoop.AllEvents, | |
| 646 self.maxProcessEventsTime) | |
| 647 del query | |
| 648 finally: | |
| 649 db.commit() | |
| 650 | |
| 651 return output | |
| 652 | |
| 653 def removeHashPrefixIndices(self, threatList, indexes): | |
| 654 """ | |
| 655 Public method to remove hash prefixes from the cache. | |
| 656 | |
| 657 @param threatList threat list to delete hash prefixes of | |
| 658 @type ThreatList | |
| 659 @param indexes list of indexes of prefixes to be removed | |
| 660 @type list of int | |
| 661 """ | |
| 662 queryStr = """ | |
| 663 DELETE FROM hash_prefix | |
| 664 WHERE threat_type=? AND platform_type=? AND | |
| 665 threat_entry_type=? AND value IN ({0}) | |
| 666 """ | |
| 667 batchSize = 40 | |
| 668 | |
| 669 prefixesToRemove = self.getHashPrefixValuesToRemove( | |
| 670 threatList, indexes) | |
| 671 if prefixesToRemove: | |
| 672 db = QSqlDatabase.database(self.__connectionName) | |
| 673 if db.isOpen(): | |
| 674 db.transaction() | |
| 675 try: | |
| 676 for index in range(0, len(prefixesToRemove), batchSize): | |
| 677 removeBatch = \ | |
| 678 prefixesToRemove[index:(index + batchSize)] | |
| 679 | |
| 680 query = QSqlQuery(db) | |
| 681 query.prepare( | |
| 682 queryStr.format(",".join(["?"] * len(removeBatch))) | |
| 683 ) | |
| 684 query.addBindValue(threatList.threatType) | |
| 685 query.addBindValue(threatList.platformType) | |
| 686 query.addBindValue(threatList.threatEntryType) | |
| 687 for prefix in removeBatch: | |
| 688 query.addBindValue(QByteArray(prefix), | |
| 689 QSql.In | QSql.Binary) | |
| 690 query.exec_() | |
| 691 del query | |
| 692 QCoreApplication.processEvents( | |
| 693 QEventLoop.AllEvents, self.maxProcessEventsTime) | |
| 694 finally: | |
| 695 db.commit() |
