Mercurial Repositories > eric / file comparison
comparison: eric7/WebBrowser/SafeBrowsing/SafeBrowsingCache.py
eric7/WebBrowser/SafeBrowsing/SafeBrowsingCache.py
- branch
- eric7
- changeset 8312
- 800c432b34c8
- parent 8218
- 7c09585bd960
- child 8318
- 962bce857696
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| 8311:4e8b98454baa | 8312:800c432b34c8 |
|---|---|
| 1 # -*- coding: utf-8 -*- | |
| 2 | |
| 3 # Copyright (c) 2017 - 2021 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 import os | |
| 18 | |
| 19 from PyQt5.QtCore import ( | |
| 20 QObject, QByteArray, QCryptographicHash, QCoreApplication, QEventLoop | |
| 21 ) | |
| 22 from PyQt5.QtSql import QSql, QSqlDatabase, QSqlQuery | |
| 23 | |
| 24 from .SafeBrowsingThreatList import ThreatList | |
| 25 | |
| 26 | |
| 27 class SafeBrowsingCache(QObject): | |
| 28 """ | |
| 29 Class implementing a cache for Google Safe Browsing. | |
| 30 """ | |
| 31 create_threat_list_stmt = """ | |
| 32 CREATE TABLE threat_list | |
| 33 (threat_type character varying(128) NOT NULL, | |
| 34 platform_type character varying(128) NOT NULL, | |
| 35 threat_entry_type character varying(128) NOT NULL, | |
| 36 client_state character varying(42), | |
| 37 timestamp timestamp without time zone DEFAULT current_timestamp, | |
| 38 PRIMARY KEY (threat_type, platform_type, threat_entry_type) | |
| 39 ) | |
| 40 """ | |
| 41 drop_threat_list_stmt = """DROP TABLE IF EXISTS threat_list""" | |
| 42 | |
| 43 create_full_hashes_stmt = """ | |
| 44 CREATE TABLE full_hash | |
| 45 (value BLOB NOT NULL, | |
| 46 threat_type character varying(128) NOT NULL, | |
| 47 platform_type character varying(128) NOT NULL, | |
| 48 threat_entry_type character varying(128) NOT NULL, | |
| 49 downloaded_at timestamp without time zone DEFAULT current_timestamp, | |
| 50 expires_at timestamp without time zone | |
| 51 NOT NULL DEFAULT current_timestamp, | |
| 52 malware_threat_type varchar(32), | |
| 53 PRIMARY KEY (value, threat_type, platform_type, threat_entry_type) | |
| 54 ) | |
| 55 """ | |
| 56 drop_full_hashes_stmt = """DROP TABLE IF EXISTS full_hash""" | |
| 57 | |
| 58 create_hash_prefix_stmt = """ | |
| 59 CREATE TABLE hash_prefix | |
| 60 (value BLOB NOT NULL, | |
| 61 cue character varying(4) NOT NULL, | |
| 62 threat_type character varying(128) NOT NULL, | |
| 63 platform_type character varying(128) NOT NULL, | |
| 64 threat_entry_type character varying(128) NOT NULL, | |
| 65 timestamp timestamp without time zone DEFAULT current_timestamp, | |
| 66 negative_expires_at timestamp without time zone | |
| 67 NOT NULL DEFAULT current_timestamp, | |
| 68 PRIMARY KEY (value, threat_type, platform_type, threat_entry_type), | |
| 69 FOREIGN KEY(threat_type, platform_type, threat_entry_type) | |
| 70 REFERENCES threat_list(threat_type, platform_type, threat_entry_type) | |
| 71 ON DELETE CASCADE | |
| 72 ) | |
| 73 """ | |
| 74 drop_hash_prefix_stmt = """DROP TABLE IF EXISTS hash_prefix""" | |
| 75 | |
| 76 create_full_hash_cue_idx = """ | |
| 77 CREATE INDEX idx_hash_prefix_cue ON hash_prefix (cue) | |
| 78 """ | |
| 79 drop_full_hash_cue_idx = """DROP INDEX IF EXISTS idx_hash_prefix_cue""" | |
| 80 | |
| 81 create_full_hash_expires_idx = """ | |
| 82 CREATE INDEX idx_full_hash_expires_at ON full_hash (expires_at) | |
| 83 """ | |
| 84 drop_full_hash_expires_idx = """ | |
| 85 DROP INDEX IF EXISTS idx_full_hash_expires_at | |
| 86 """ | |
| 87 | |
| 88 create_full_hash_value_idx = """ | |
| 89 CREATE INDEX idx_full_hash_value ON full_hash (value) | |
| 90 """ | |
| 91 drop_full_hash_value_idx = """DROP INDEX IF EXISTS idx_full_hash_value""" | |
| 92 | |
| 93 maxProcessEventsTime = 500 | |
| 94 | |
| 95 def __init__(self, dbPath, parent=None): | |
| 96 """ | |
| 97 Constructor | |
| 98 | |
| 99 @param dbPath path to store the cache DB into | |
| 100 @type str | |
| 101 @param parent reference to the parent object | |
| 102 @type QObject | |
| 103 """ | |
| 104 super().__init__(parent) | |
| 105 | |
| 106 self.__connectionName = "SafeBrowsingCache" | |
| 107 | |
| 108 if not os.path.exists(dbPath): | |
| 109 os.makedirs(dbPath) | |
| 110 | |
| 111 self.__dbFileName = os.path.join(dbPath, "SafeBrowsingCache.db") | |
| 112 preparationNeeded = not os.path.exists(self.__dbFileName) | |
| 113 | |
| 114 self.__openCacheDb() | |
| 115 if preparationNeeded: | |
| 116 self.prepareCacheDb() | |
| 117 | |
| 118 def close(self): | |
| 119 """ | |
| 120 Public method to close the database. | |
| 121 """ | |
| 122 if QSqlDatabase.database(self.__connectionName).isOpen(): | |
| 123 QSqlDatabase.database(self.__connectionName).close() | |
| 124 QSqlDatabase.removeDatabase(self.__connectionName) | |
| 125 | |
| 126 def __openCacheDb(self): | |
| 127 """ | |
| 128 Private method to open the cache database. | |
| 129 | |
| 130 @return flag indicating the open state | |
| 131 @rtype bool | |
| 132 """ | |
| 133 db = QSqlDatabase.database(self.__connectionName, False) | |
| 134 if not db.isValid(): | |
| 135 # the database connection is a new one | |
| 136 db = QSqlDatabase.addDatabase("QSQLITE", self.__connectionName) | |
| 137 db.setDatabaseName(self.__dbFileName) | |
| 138 opened = db.open() | |
| 139 if not opened: | |
| 140 QSqlDatabase.removeDatabase(self.__connectionName) | |
| 141 else: | |
| 142 opened = True | |
| 143 return opened | |
| 144 | |
| 145 def prepareCacheDb(self): | |
| 146 """ | |
| 147 Public method to prepare the cache database. | |
| 148 """ | |
| 149 db = QSqlDatabase.database(self.__connectionName) | |
| 150 db.transaction() | |
| 151 try: | |
| 152 query = QSqlQuery(db) | |
| 153 # step 1: drop old tables | |
| 154 query.exec(self.drop_threat_list_stmt) | |
| 155 query.exec(self.drop_full_hashes_stmt) | |
| 156 query.exec(self.drop_hash_prefix_stmt) | |
| 157 # step 2: drop old indices | |
| 158 query.exec(self.drop_full_hash_cue_idx) | |
| 159 query.exec(self.drop_full_hash_expires_idx) | |
| 160 query.exec(self.drop_full_hash_value_idx) | |
| 161 # step 3: create tables | |
| 162 query.exec(self.create_threat_list_stmt) | |
| 163 query.exec(self.create_full_hashes_stmt) | |
| 164 query.exec(self.create_hash_prefix_stmt) | |
| 165 # step 4: create indices | |
| 166 query.exec(self.create_full_hash_cue_idx) | |
| 167 query.exec(self.create_full_hash_expires_idx) | |
| 168 query.exec(self.create_full_hash_value_idx) | |
| 169 finally: | |
| 170 del query | |
| 171 db.commit() | |
| 172 | |
| 173 def lookupFullHashes(self, hashValues): | |
| 174 """ | |
| 175 Public method to get a list of threat lists and expiration flag | |
| 176 for the given hashes if a hash is blacklisted. | |
| 177 | |
| 178 @param hashValues list of hash values to look up | |
| 179 @type list of bytes | |
| 180 @return list of tuples containing the threat list info and the | |
| 181 expiration flag | |
| 182 @rtype list of tuple of (ThreatList, bool) | |
| 183 """ | |
| 184 queryStr = """ | |
| 185 SELECT threat_type, platform_type, threat_entry_type, | |
| 186 expires_at < current_timestamp AS has_expired | |
| 187 FROM full_hash WHERE value IN ({0}) | |
| 188 """ | |
| 189 output = [] | |
| 190 | |
| 191 db = QSqlDatabase.database(self.__connectionName) | |
| 192 if db.isOpen(): | |
| 193 db.transaction() | |
| 194 try: | |
| 195 query = QSqlQuery(db) | |
| 196 query.prepare( | |
| 197 queryStr.format(",".join(["?"] * len(hashValues)))) | |
| 198 for hashValue in hashValues: | |
| 199 query.addBindValue( | |
| 200 QByteArray(hashValue), | |
| 201 QSql.ParamTypeFlag.In | QSql.ParamTypeFlag.Binary) | |
| 202 | |
| 203 query.exec() | |
| 204 | |
| 205 while query.next(): # __IGNORE_WARNING_M523__ | |
| 206 threatType = query.value(0) | |
| 207 platformType = query.value(1) | |
| 208 threatEntryType = query.value(2) | |
| 209 hasExpired = bool(query.value(3)) | |
| 210 threatList = ThreatList(threatType, platformType, | |
| 211 threatEntryType) | |
| 212 output.append((threatList, hasExpired)) | |
| 213 QCoreApplication.processEvents( | |
| 214 QEventLoop.ProcessEventsFlag.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_M523__ | |
| 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( | |
| 261 QEventLoop.ProcessEventsFlag.AllEvents, | |
| 262 self.maxProcessEventsTime) | |
| 263 del query | |
| 264 finally: | |
| 265 db.commit() | |
| 266 | |
| 267 return output | |
| 268 | |
| 269 def storeFullHash(self, threatList, hashValue, cacheDuration, | |
| 270 malwareThreatType): | |
| 271 """ | |
| 272 Public method to store full hash data in the cache database. | |
| 273 | |
| 274 @param threatList threat list info object | |
| 275 @type ThreatList | |
| 276 @param hashValue hash to be stored | |
| 277 @type bytes | |
| 278 @param cacheDuration duration the data should remain in the cache | |
| 279 @type int or float | |
| 280 @param malwareThreatType threat type of the malware | |
| 281 @type str | |
| 282 """ | |
| 283 insertQueryStr = """ | |
| 284 INSERT OR IGNORE INTO full_hash | |
| 285 (value, threat_type, platform_type, threat_entry_type, | |
| 286 malware_threat_type, downloaded_at) | |
| 287 VALUES | |
| 288 (?, ?, ?, ?, ?, current_timestamp) | |
| 289 """ | |
| 290 updateQueryStr = ( | |
| 291 """ | |
| 292 UPDATE full_hash SET | |
| 293 expires_at=datetime(current_timestamp, '+{0} SECONDS') | |
| 294 WHERE value=? AND threat_type=? AND platform_type=? AND | |
| 295 threat_entry_type=? | |
| 296 """.format(int(cacheDuration)) | |
| 297 ) | |
| 298 | |
| 299 db = QSqlDatabase.database(self.__connectionName) | |
| 300 if db.isOpen(): | |
| 301 db.transaction() | |
| 302 try: | |
| 303 query = QSqlQuery(db) | |
| 304 query.prepare(insertQueryStr) | |
| 305 query.addBindValue( | |
| 306 QByteArray(hashValue), | |
| 307 QSql.ParamTypeFlag.In | QSql.ParamTypeFlag.Binary) | |
| 308 query.addBindValue(threatList.threatType) | |
| 309 query.addBindValue(threatList.platformType) | |
| 310 query.addBindValue(threatList.threatEntryType) | |
| 311 query.addBindValue(malwareThreatType) | |
| 312 query.exec() | |
| 313 del query | |
| 314 | |
| 315 query = QSqlQuery(db) | |
| 316 query.prepare(updateQueryStr) | |
| 317 query.addBindValue( | |
| 318 QByteArray(hashValue), | |
| 319 QSql.ParamTypeFlag.In | QSql.ParamTypeFlag.Binary) | |
| 320 query.addBindValue(threatList.threatType) | |
| 321 query.addBindValue(threatList.platformType) | |
| 322 query.addBindValue(threatList.threatEntryType) | |
| 323 query.exec() | |
| 324 del query | |
| 325 finally: | |
| 326 db.commit() | |
| 327 | |
| 328 def deleteHashPrefixList(self, threatList): | |
| 329 """ | |
| 330 Public method to delete hash prefixes for a given threat list. | |
| 331 | |
| 332 @param threatList threat list info object | |
| 333 @type ThreatList | |
| 334 """ | |
| 335 queryStr = """ | |
| 336 DELETE FROM hash_prefix | |
| 337 WHERE threat_type=? AND platform_type=? AND threat_entry_type=? | |
| 338 """ | |
| 339 | |
| 340 db = QSqlDatabase.database(self.__connectionName) | |
| 341 if db.isOpen(): | |
| 342 db.transaction() | |
| 343 try: | |
| 344 query = QSqlQuery(db) | |
| 345 query.prepare(queryStr) | |
| 346 query.addBindValue(threatList.threatType) | |
| 347 query.addBindValue(threatList.platformType) | |
| 348 query.addBindValue(threatList.threatEntryType) | |
| 349 query.exec() | |
| 350 del query | |
| 351 finally: | |
| 352 db.commit() | |
| 353 | |
| 354 def cleanupFullHashes(self, keepExpiredFor=43200): | |
| 355 """ | |
| 356 Public method to clean up full hash entries expired more than the | |
| 357 given time. | |
| 358 | |
| 359 @param keepExpiredFor time period in seconds of entries to be expired | |
| 360 @type int or float | |
| 361 """ | |
| 362 queryStr = ( | |
| 363 """ | |
| 364 DELETE FROM full_hash | |
| 365 WHERE expires_at=datetime(current_timestamp, '{0} SECONDS') | |
| 366 """.format(int(keepExpiredFor)) | |
| 367 ) | |
| 368 | |
| 369 db = QSqlDatabase.database(self.__connectionName) | |
| 370 if db.isOpen(): | |
| 371 db.transaction() | |
| 372 try: | |
| 373 query = QSqlQuery(db) | |
| 374 query.prepare(queryStr) | |
| 375 query.exec() | |
| 376 del query | |
| 377 finally: | |
| 378 db.commit() | |
| 379 | |
| 380 def updateHashPrefixExpiration(self, threatList, hashPrefix, | |
| 381 negativeCacheDuration): | |
| 382 """ | |
| 383 Public method to update the hash prefix expiration time. | |
| 384 | |
| 385 @param threatList threat list info object | |
| 386 @type ThreatList | |
| 387 @param hashPrefix hash prefix | |
| 388 @type bytes | |
| 389 @param negativeCacheDuration time in seconds the entry should remain | |
| 390 in the cache | |
| 391 @type int or float | |
| 392 """ | |
| 393 queryStr = ( | |
| 394 """ | |
| 395 UPDATE hash_prefix | |
| 396 SET negative_expires_at=datetime(current_timestamp, '+{0} SECONDS') | |
| 397 WHERE value=? AND threat_type=? AND platform_type=? AND | |
| 398 threat_entry_type=? | |
| 399 """.format(int(negativeCacheDuration)) | |
| 400 ) | |
| 401 | |
| 402 db = QSqlDatabase.database(self.__connectionName) | |
| 403 if db.isOpen(): | |
| 404 db.transaction() | |
| 405 try: | |
| 406 query = QSqlQuery(db) | |
| 407 query.prepare(queryStr) | |
| 408 query.addBindValue( | |
| 409 QByteArray(hashPrefix), | |
| 410 QSql.ParamTypeFlag.In | QSql.ParamTypeFlag.Binary) | |
| 411 query.addBindValue(threatList.threatType) | |
| 412 query.addBindValue(threatList.platformType) | |
| 413 query.addBindValue(threatList.threatEntryType) | |
| 414 query.exec() | |
| 415 del query | |
| 416 finally: | |
| 417 db.commit() | |
| 418 | |
| 419 def getThreatLists(self): | |
| 420 """ | |
| 421 Public method to get the available threat lists. | |
| 422 | |
| 423 @return list of available threat lists | |
| 424 @rtype list of tuples of (ThreatList, str) | |
| 425 """ | |
| 426 queryStr = """ | |
| 427 SELECT threat_type,platform_type,threat_entry_type,client_state | |
| 428 FROM threat_list | |
| 429 """ | |
| 430 output = [] | |
| 431 | |
| 432 db = QSqlDatabase.database(self.__connectionName) | |
| 433 if db.isOpen(): | |
| 434 db.transaction() | |
| 435 try: | |
| 436 query = QSqlQuery(db) | |
| 437 query.prepare(queryStr) | |
| 438 | |
| 439 query.exec() | |
| 440 | |
| 441 while query.next(): # __IGNORE_WARNING_M523__ | |
| 442 threatType = query.value(0) | |
| 443 platformType = query.value(1) | |
| 444 threatEntryType = query.value(2) | |
| 445 clientState = query.value(3) | |
| 446 threatList = ThreatList(threatType, platformType, | |
| 447 threatEntryType) | |
| 448 output.append((threatList, clientState)) | |
| 449 QCoreApplication.processEvents( | |
| 450 QEventLoop.ProcessEventsFlag.AllEvents, | |
| 451 self.maxProcessEventsTime) | |
| 452 del query | |
| 453 finally: | |
| 454 db.commit() | |
| 455 | |
| 456 return output | |
| 457 | |
| 458 def addThreatList(self, threatList): | |
| 459 """ | |
| 460 Public method to add a threat list to the cache. | |
| 461 | |
| 462 @param threatList threat list to be added | |
| 463 @type ThreatList | |
| 464 """ | |
| 465 queryStr = """ | |
| 466 INSERT OR IGNORE INTO threat_list | |
| 467 (threat_type, platform_type, threat_entry_type, timestamp) | |
| 468 VALUES (?, ?, ?, current_timestamp) | |
| 469 """ | |
| 470 | |
| 471 db = QSqlDatabase.database(self.__connectionName) | |
| 472 if db.isOpen(): | |
| 473 db.transaction() | |
| 474 try: | |
| 475 query = QSqlQuery(db) | |
| 476 query.prepare(queryStr) | |
| 477 query.addBindValue(threatList.threatType) | |
| 478 query.addBindValue(threatList.platformType) | |
| 479 query.addBindValue(threatList.threatEntryType) | |
| 480 query.exec() | |
| 481 del query | |
| 482 finally: | |
| 483 db.commit() | |
| 484 | |
| 485 def deleteThreatList(self, threatList): | |
| 486 """ | |
| 487 Public method to delete a threat list from the cache. | |
| 488 | |
| 489 @param threatList threat list to be deleted | |
| 490 @type ThreatList | |
| 491 """ | |
| 492 queryStr = """ | |
| 493 DELETE FROM threat_list | |
| 494 WHERE threat_type=? AND platform_type=? AND threat_entry_type=? | |
| 495 """ | |
| 496 | |
| 497 db = QSqlDatabase.database(self.__connectionName) | |
| 498 if db.isOpen(): | |
| 499 db.transaction() | |
| 500 try: | |
| 501 query = QSqlQuery(db) | |
| 502 query.prepare(queryStr) | |
| 503 query.addBindValue(threatList.threatType) | |
| 504 query.addBindValue(threatList.platformType) | |
| 505 query.addBindValue(threatList.threatEntryType) | |
| 506 query.exec() | |
| 507 del query | |
| 508 finally: | |
| 509 db.commit() | |
| 510 | |
| 511 def updateThreatListClientState(self, threatList, clientState): | |
| 512 """ | |
| 513 Public method to update the client state of a threat list. | |
| 514 | |
| 515 @param threatList threat list to update the client state for | |
| 516 @type ThreatList | |
| 517 @param clientState new client state | |
| 518 @type str | |
| 519 """ | |
| 520 queryStr = """ | |
| 521 UPDATE threat_list SET timestamp=current_timestamp, client_state=? | |
| 522 WHERE threat_type=? AND platform_type=? AND threat_entry_type=? | |
| 523 """ | |
| 524 | |
| 525 db = QSqlDatabase.database(self.__connectionName) | |
| 526 if db.isOpen(): | |
| 527 db.transaction() | |
| 528 try: | |
| 529 query = QSqlQuery(db) | |
| 530 query.prepare(queryStr) | |
| 531 query.addBindValue(clientState) | |
| 532 query.addBindValue(threatList.threatType) | |
| 533 query.addBindValue(threatList.platformType) | |
| 534 query.addBindValue(threatList.threatEntryType) | |
| 535 query.exec() | |
| 536 del query | |
| 537 finally: | |
| 538 db.commit() | |
| 539 | |
| 540 def hashPrefixListChecksum(self, threatList): | |
| 541 """ | |
| 542 Public method to calculate the SHA256 checksum for an alphabetically | |
| 543 sorted concatenated list of hash prefixes. | |
| 544 | |
| 545 @param threatList threat list to calculate checksum for | |
| 546 @type ThreatList | |
| 547 @return SHA256 checksum | |
| 548 @rtype bytes | |
| 549 """ | |
| 550 queryStr = """ | |
| 551 SELECT value FROM hash_prefix | |
| 552 WHERE threat_type=? AND platform_type=? AND threat_entry_type=? | |
| 553 ORDER BY value | |
| 554 """ | |
| 555 checksum = None | |
| 556 | |
| 557 db = QSqlDatabase.database(self.__connectionName) | |
| 558 if db.isOpen(): | |
| 559 db.transaction() | |
| 560 sha256Hash = QCryptographicHash( | |
| 561 QCryptographicHash.Algorithm.Sha256) | |
| 562 try: | |
| 563 query = QSqlQuery(db) | |
| 564 query.prepare(queryStr) | |
| 565 query.addBindValue(threatList.threatType) | |
| 566 query.addBindValue(threatList.platformType) | |
| 567 query.addBindValue(threatList.threatEntryType) | |
| 568 | |
| 569 query.exec() | |
| 570 | |
| 571 while query.next(): # __IGNORE_WARNING_M523__ | |
| 572 sha256Hash.addData(query.value(0)) | |
| 573 QCoreApplication.processEvents( | |
| 574 QEventLoop.ProcessEventsFlag.AllEvents, | |
| 575 self.maxProcessEventsTime) | |
| 576 del query | |
| 577 finally: | |
| 578 db.commit() | |
| 579 | |
| 580 checksum = bytes(sha256Hash.result()) | |
| 581 | |
| 582 return checksum | |
| 583 | |
| 584 def populateHashPrefixList(self, threatList, prefixes): | |
| 585 """ | |
| 586 Public method to populate the hash prefixes for a threat list. | |
| 587 | |
| 588 @param threatList threat list of the hash prefixes | |
| 589 @type ThreatList | |
| 590 @param prefixes list of hash prefixes to be inserted | |
| 591 @type HashPrefixList | |
| 592 """ | |
| 593 queryStr = """ | |
| 594 INSERT INTO hash_prefix | |
| 595 (value, cue, threat_type, platform_type, threat_entry_type, | |
| 596 timestamp) | |
| 597 VALUES (?, ?, ?, ?, ?, current_timestamp) | |
| 598 """ | |
| 599 | |
| 600 db = QSqlDatabase.database(self.__connectionName) | |
| 601 if db.isOpen(): | |
| 602 db.transaction() | |
| 603 try: | |
| 604 for prefix in prefixes: | |
| 605 query = QSqlQuery(db) | |
| 606 query.prepare(queryStr) | |
| 607 query.addBindValue( | |
| 608 QByteArray(prefix), | |
| 609 QSql.ParamTypeFlag.In | QSql.ParamTypeFlag.Binary) | |
| 610 query.addBindValue(prefix[:4].hex()) | |
| 611 query.addBindValue(threatList.threatType) | |
| 612 query.addBindValue(threatList.platformType) | |
| 613 query.addBindValue(threatList.threatEntryType) | |
| 614 query.exec() | |
| 615 del query | |
| 616 QCoreApplication.processEvents( | |
| 617 QEventLoop.ProcessEventsFlag.AllEvents, | |
| 618 self.maxProcessEventsTime) | |
| 619 finally: | |
| 620 db.commit() | |
| 621 | |
| 622 def getHashPrefixValuesToRemove(self, threatList, indexes): | |
| 623 """ | |
| 624 Public method to get the hash prefix values to be removed from the | |
| 625 cache. | |
| 626 | |
| 627 @param threatList threat list to remove prefixes from | |
| 628 @type ThreatList | |
| 629 @param indexes list of indexes of prefixes to be removed | |
| 630 @type list of int | |
| 631 @return list of hash prefixes to be removed | |
| 632 @rtype list of bytes | |
| 633 """ | |
| 634 queryStr = """ | |
| 635 SELECT value FROM hash_prefix | |
| 636 WHERE threat_type=? AND platform_type=? AND threat_entry_type=? | |
| 637 ORDER BY value | |
| 638 """ | |
| 639 indexes = set(indexes) | |
| 640 output = [] | |
| 641 | |
| 642 db = QSqlDatabase.database(self.__connectionName) | |
| 643 if db.isOpen(): | |
| 644 db.transaction() | |
| 645 try: | |
| 646 query = QSqlQuery(db) | |
| 647 query.prepare(queryStr) | |
| 648 query.addBindValue(threatList.threatType) | |
| 649 query.addBindValue(threatList.platformType) | |
| 650 query.addBindValue(threatList.threatEntryType) | |
| 651 | |
| 652 query.exec() | |
| 653 | |
| 654 index = 0 | |
| 655 while query.next(): # __IGNORE_WARNING_M523__ | |
| 656 if index in indexes: | |
| 657 prefix = bytes(query.value(0)) | |
| 658 output.append(prefix) | |
| 659 index += 1 | |
| 660 QCoreApplication.processEvents( | |
| 661 QEventLoop.ProcessEventsFlag.AllEvents, | |
| 662 self.maxProcessEventsTime) | |
| 663 del query | |
| 664 finally: | |
| 665 db.commit() | |
| 666 | |
| 667 return output | |
| 668 | |
| 669 def removeHashPrefixIndices(self, threatList, indexes): | |
| 670 """ | |
| 671 Public method to remove hash prefixes from the cache. | |
| 672 | |
| 673 @param threatList threat list to delete hash prefixes of | |
| 674 @type ThreatList | |
| 675 @param indexes list of indexes of prefixes to be removed | |
| 676 @type list of int | |
| 677 """ | |
| 678 queryStr = ( | |
| 679 """ | |
| 680 DELETE FROM hash_prefix | |
| 681 WHERE threat_type=? AND platform_type=? AND | |
| 682 threat_entry_type=? AND value IN ({0}) | |
| 683 """ | |
| 684 ) | |
| 685 batchSize = 40 | |
| 686 | |
| 687 prefixesToRemove = self.getHashPrefixValuesToRemove( | |
| 688 threatList, indexes) | |
| 689 if prefixesToRemove: | |
| 690 db = QSqlDatabase.database(self.__connectionName) | |
| 691 if db.isOpen(): | |
| 692 db.transaction() | |
| 693 try: | |
| 694 for index in range(0, len(prefixesToRemove), batchSize): | |
| 695 removeBatch = prefixesToRemove[ | |
| 696 index:(index + batchSize) | |
| 697 ] | |
| 698 | |
| 699 query = QSqlQuery(db) | |
| 700 query.prepare( | |
| 701 queryStr.format(",".join(["?"] * len(removeBatch))) | |
| 702 ) | |
| 703 query.addBindValue(threatList.threatType) | |
| 704 query.addBindValue(threatList.platformType) | |
| 705 query.addBindValue(threatList.threatEntryType) | |
| 706 for prefix in removeBatch: | |
| 707 query.addBindValue( | |
| 708 QByteArray(prefix), | |
| 709 QSql.ParamTypeFlag.In | | |
| 710 QSql.ParamTypeFlag.Binary) | |
| 711 query.exec() | |
| 712 del query | |
| 713 QCoreApplication.processEvents( | |
| 714 QEventLoop.ProcessEventsFlag.AllEvents, | |
| 715 self.maxProcessEventsTime) | |
| 716 finally: | |
| 717 db.commit() | |
| 718 | |
| 719 # | |
| 720 # eflag: noqa = S608 |
