Arnicus

Using _Crypt_DecryptData to decrypt strings from _StringEncrypt

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Is it possible to use _Crypt_DecryptData to decrypt a string that was encrypted using _StringEncrypt?

I haven't been having any luck with it.  The documentation for _StringEncrypt says it uses RC4 encryption, but the following is not doing the trick when I feed it something that was encrypted by _StringEncrypt.

Local $bDecrypted = _Crypt_DecryptData(GUICtrlRead($g_idInputEdit), "MyPassword", $CALG_RC4) 

Local $bDecryptedString = BinaryToString($bDecrypted, 1)

 

Am I doing something wrong, or am I just trying to do something that isn't possible?
 

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#2 ·  Posted (edited)

According to the version history (v3.3.10.0 - Dec 23, 2013):

  • _StringEncrypt() documentation has been removed. The function is still present in String.au3, but may be removed at a later date. Scripts should be updated to use the Crypt functions instead.  Look at _Crypt_EncryptData() for an example of an alternative _StringEncrypt.

 

Edited by spudw2k

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Thanks, Spudw2k.

Unfortunately, I've got old files running around that have encrypted text in them that was created with _StringEncrypt.  I'm hoping I can write new code with _Crypt_DecryptData that will still read those old files correctly.  Anybody know if that's possible?

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_StringEncrypt and friends is (was) buggy as hell and is incompatible with the now-correct _Crypt_* functions. So your best bet is to use the buggy _StringDecrypt to read back olf stuff to plaintext then switch to _Crypt* functions from there on.

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Thanks, JCHD.  I was afraid of that.  I guess that's what I'll do.

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