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[CRYPTO] blkcipher: Added blkcipher_walk_virt_block

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This patch adds the helper blkcipher_walk_virt_block which is similar to
blkcipher_walk_virt but uses a supplied block size instead of the block
size of the block cipher.  This is useful for CTR where the block size is
1 but we still want to walk by the block size of the underlying cipher.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu
2007-10-04 15:24:05 +08:00
committed by David S. Miller
parent 2614de1b9a
commit 7607bd8ff0
2 changed files with 28 additions and 10 deletions
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4
include/crypto/algapi.h
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@@ -91,6 +91,7 @@ struct blkcipher_walk {
u8 *iv;
int flags;
unsigned int blocksize;
};
extern const struct crypto_type crypto_ablkcipher_type;
@@ -129,6 +130,9 @@ int blkcipher_walk_virt(struct blkcipher_desc *desc,
struct blkcipher_walk *walk);
int blkcipher_walk_phys(struct blkcipher_desc *desc,
struct blkcipher_walk *walk);
int blkcipher_walk_virt_block(struct blkcipher_desc *desc,
struct blkcipher_walk *walk,
unsigned int blocksize);
static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm)
{