GCM mode and GCRY_CIPHER_AES256

[Werner Koch]

On Fri, 30 May 2014 01:23, ddahl at nulltxt.se said:

> err = gcry_cipher_open(&handle, GCRY_CIPHER, GCRY_CIPHER_MODE, 0);
>
> returns with: "GCM algo 9, gcry_cipher_open failed: Invalid cipher mode"

Please paste the actual code so that we can understand and replicate the
case.

> Doesn't AES 256 use a block size of 16 bytes?

The block length of AES is indeed 16 bytes.


Shalom-Salam,

   Werner

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