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authorArd Biesheuvel <ard.biesheuvel@linaro.org>2014-03-04 06:28:39 +0100
committerHerbert Xu <herbert@gondor.apana.org.au>2014-03-10 13:17:11 +0100
commit4f7f1d7cff8f2c170ce0319eb4c01a82c328d34f (patch)
treed894dab0c42e11d7159d56b3949e96fdba91fadb /crypto/blkcipher.c
parentcrypto: remove direct blkcipher_walk dependency on transform (diff)
downloadlinux-4f7f1d7cff8f2c170ce0319eb4c01a82c328d34f.tar.xz
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crypto: allow blkcipher walks over AEAD data
This adds the function blkcipher_aead_walk_virt_block, which allows the caller to use the blkcipher walk API to handle the input and output scatterlists. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/blkcipher.c')
-rw-r--r--crypto/blkcipher.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/crypto/blkcipher.c b/crypto/blkcipher.c
index 46fdab5e9cc7..0122bec38564 100644
--- a/crypto/blkcipher.c
+++ b/crypto/blkcipher.c
@@ -357,6 +357,20 @@ int blkcipher_walk_virt_block(struct blkcipher_desc *desc,
}
EXPORT_SYMBOL_GPL(blkcipher_walk_virt_block);
+int blkcipher_aead_walk_virt_block(struct blkcipher_desc *desc,
+ struct blkcipher_walk *walk,
+ struct crypto_aead *tfm,
+ unsigned int blocksize)
+{
+ walk->flags &= ~BLKCIPHER_WALK_PHYS;
+ walk->walk_blocksize = blocksize;
+ walk->cipher_blocksize = crypto_aead_blocksize(tfm);
+ walk->ivsize = crypto_aead_ivsize(tfm);
+ walk->alignmask = crypto_aead_alignmask(tfm);
+ return blkcipher_walk_first(desc, walk);
+}
+EXPORT_SYMBOL_GPL(blkcipher_aead_walk_virt_block);
+
static int setkey_unaligned(struct crypto_tfm *tfm, const u8 *key,
unsigned int keylen)
{