From 4f7f1d7cff8f2c170ce0319eb4c01a82c328d34f Mon Sep 17 00:00:00 2001 From: Ard Biesheuvel Date: Tue, 4 Mar 2014 13:28:39 +0800 Subject: 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 Signed-off-by: Herbert Xu --- crypto/blkcipher.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'crypto/blkcipher.c') 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) { -- cgit v1.2.3