tree 74e011e9b95291f230d6e7200730e3bc3b9d7153
parent 806d183aa6cc565d0f6bd2fb7fc6bfb175cc4813
author Herbert Xu <herbert@gondor.apana.org.au> 1196732808 +1100
committer Herbert Xu <herbert@gondor.apana.org.au> 1199999806 +1100

[CRYPTO] skcipher: Create default givcipher instances

This patch makes crypto_alloc_ablkcipher/crypto_grab_skcipher always
return algorithms that are capable of generating their own IVs through
givencrypt and givdecrypt.  Each algorithm may specify its default IV
generator through the geniv field.

For algorithms that do not set the geniv field, the blkcipher layer will
pick a default.  Currently it's chainiv for synchronous algorithms and
eseqiv for asynchronous algorithms.  Note that if these wrappers do not
work on an algorithm then that algorithm must specify its own geniv or
it can't be used at all.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>