Hi, all,

I'm fairly new to Crypto++, so I expect I'm missing something that may
be obvious to others.  On the other hand, it might be a bug, so I
thought I would bring it up here.

I'm creating a CBC_Mode AES decryptor.  Depending on how I create it,
I get different results:

        CryptoPP::CBC_Mode<CryptoPP::AES>::Decryption Decryptor;
        Decryptor.SetKeyWithIV(key, sizeof(key), iv, sizeof(iv));

works fine.  If I try to use the constructor to set the key and IV
like this:

        CryptoPP::CBC_Mode<CryptoPP::AES>::Decryption Decryptor(key,
sizeof(key), iv, sizeof(iv));

I get an exception:

"Failure in TestEncryption2: Unhandled exception:
AlgorithmParametersBase: parameter "FeedbackSize" not used"

I haven't been able to find any documentation on the parameters, so I
don't know if this is expected or not, so I thought I'd put it out
here.

For now, I'm simply going with the SetKeyWithIV method instead.

tj

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