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crypto: blkcipher - Do not use eseqiv on stream ciphers 

Recently we switched to using eseqiv on SMP machines in preference
over chainiv.  However, eseqiv does not support stream ciphers so
they should still default to chainiv.

This patch applies the same check as done by eseqiv to weed out
the stream ciphers.  In particular, all algorithms where the IV
size is not equal to the block size will now default to chainiv.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2009-08-14 22:55:35 +10:00
parent aef27136b8
commit 63b5ac286d
1 changed files with 6 additions and 0 deletions
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6
crypto/ablkcipher.c
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@ -183,6 +183,12 @@ EXPORT_SYMBOL_GPL(crypto_givcipher_type);
const char *crypto_default_geniv(const struct crypto_alg *alg)
{
if (((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) ==
CRYPTO_ALG_TYPE_BLKCIPHER ? alg->cra_blkcipher.ivsize :
alg->cra_ablkcipher.ivsize) !=
alg->cra_blocksize)
return "chainiv";
return alg->cra_flags & CRYPTO_ALG_ASYNC ?
"eseqiv" : skcipher_default_geniv;
}