AES192 & AES256 in CBC mode [libgcrypt]

[Jan Bilek]

Hello,

I've just bounced in a potential problem with libgcrypt while trying to 
do AES192 & AES256 in CBC mode.

All works well with AES128 for all cipher modes, however when moving to 
AES192 & AES256 and GCRY_CIPHER_MODE_CBC it looks like all buffers are 
being written just in first 128 bits of output.

Please see example code attached.

Let me know if you'll be able to confirm that and if confirmed if I may 
help with fixing it.

Thank you & Kind Regards,
Jan

Jan Bilek
CTO, EFTlab Pty Ltd
email:jan.bilek at eftlab.co.uk
mob:   +61 (0) 498 103 179

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