mehdi350 Posted September 2, 2022 Share Posted September 2, 2022 I have a problem with the function _Crypt_DecryptFile ( $sSourceFile, $sDestinationFile, $vCryptKey, $iAlgID ) I encrypt an Excel file with _Crypt_Encrypt with the algorithm $CALG_AES_256 and with $vCryptKey=123 but when I launched a brute force to decrypt this file unfortunately this function Returns True even if $vCryptKey is different from 123 For example this function returns true even if $vCryptKey= 27 and 143 and 067 are there any negative holes in this function thank you Link to comment Share on other sites More sharing options...
jchd Posted September 2, 2022 Share Posted September 2, 2022 Cross-posting on both the French and English fora is pointless. You've read my answer over there, so don't do it. This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe hereRegExp tutorial: enough to get startedPCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta. SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt) Link to comment Share on other sites More sharing options...
mehdi350 Posted September 2, 2022 Author Share Posted September 2, 2022 excuse me I posted this problem on the French and English forums to have different solutions Link to comment Share on other sites More sharing options...
Musashi Posted September 2, 2022 Share Posted September 2, 2022 (edited) 2 hours ago, mehdi350 said: ... excuse me I posted this problem on the French and English forums to have different solutions @jchd has already explained in detail (French forum), why the function _Crypt_DecryptFile may return True even though an incorrect CryptKey has been passed. However, in none of these cases does this function return the original file, meaning the operation is safe. For interested users : Here is the 'french' link : https://www.autoitscript.fr/forum/viewtopic.php?f=3&t=15803 So if you are looking for an alternative solution, then I recommend taking a look at the UDF cryptong-udf-cryptography-api-next-gen made by @TheXman. Additional info : A brute force operation on an AES256 encrypted file, unless the password was chosen super simple, could take some time (your lifetime for example ). The use of such a simple password is strongly discouraged. Edited September 2, 2022 by Musashi additional info "In the beginning the Universe was created. This has made a lot of people very angry and been widely regarded as a bad move." Link to comment Share on other sites More sharing options...
mehdi350 Posted September 3, 2022 Author Share Posted September 3, 2022 thank you Musashi Link to comment Share on other sites More sharing options...
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