> Is there a way to determine if
> a string is encrypted in DES or AES?

No

> Will the decrypt AES fail on a DES
> encrypted string always or will openssl return a good return but with
> garbage as the decrypted string?

The latter


-----Original Message-----
From: owner-openssl-us...@openssl.org
[mailto:owner-openssl-us...@openssl.org] On Behalf Of canroc
Sent: Tuesday, August 04, 2009 4:39 AM
To: openssl-users@openssl.org
Subject: openssl decrypting unknown whether DES or AES encrypted


Moving from DES to AES encryption and all new encryption will be AES.
However
some existing strings were encrypted in DES. Is there a way to determine if
a string is encrypted in DES or AES?  Will the decrypt AES fail on a DES
encrypted string always or will openssl return a good return but with
garbage as the decrypted string?


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