Thread (3 messages) 3 messages, 2 authors, 2015-08-19

Re: cbc(aes-aesni) a givcipher?

From: Herbert Xu <herbert@gondor.apana.org.au>
Date: 2015-08-19 12:47:42

On Wed, Aug 19, 2015 at 12:31:13PM +0200, Stephan Mueller wrote:
quoted
with the latest cryptodev-2.6 tree I find the following:

name         : cbc(aes)
driver       : cbc(aes-aesni)
module       : kernel
priority     : 300
refcnt       : 1
selftest     : passed
internal     : no
type         : givcipher
async        : no
blocksize    : 16
min keysize  : 16
max keysize  : 32
ivsize       : 16
geniv        : eseqiv

name         : cbc(aes)
driver       : cbc(aes-aesni)
module       : cbc
priority     : 300
refcnt       : 1
selftest     : passed
internal     : no
type         : blkcipher
blocksize    : 16
min keysize  : 16
max keysize  : 32
ivsize       : 16
geniv        : <default>
This is how it's supposed to look like as ablkcipher also has
implicit IV generators like AEAD used to have.  I'm working on
a patch set to get rid of them just like what we did to AEAD.
quoted
Note the type of the ciphers. With this, an allocation of cbc(aes-aesni)
does not work (ENOENT).
 
Just a followup: I think I see how I triggered it; I used cbc(aes-aesni) with 
crypto_alloc_aead due to an accident.
So are you saying that crypto_alloc_blkcipher is failing? If it's
only crypto_alloc_aead failing then I don't see the problem.

Cheers,
-- 
Email: Herbert Xu [off-list ref]
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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