diff options
| -rw-r--r-- | crypto/blkcipher.c | 21 | ||||
| -rw-r--r-- | include/crypto/algapi.h | 3 |
2 files changed, 24 insertions, 0 deletions
diff --git a/crypto/blkcipher.c b/crypto/blkcipher.c index 8cc1622b2ee0..dae7194bceb9 100644 --- a/crypto/blkcipher.c +++ b/crypto/blkcipher.c @@ -372,6 +372,27 @@ int blkcipher_aead_walk_virt_block(struct blkcipher_desc *desc, } EXPORT_SYMBOL_GPL(blkcipher_aead_walk_virt_block); +/* + * This function allows ablkcipher algorithms to use the blkcipher_walk API to + * walk over their data. The specified crypto_ablkcipher tfm is used to + * initialize the struct blkcipher_walk, and the crypto_blkcipher specified in + * desc->tfm is never used so it can be left NULL. (Yes, this design is ugly, + * but it parallels blkcipher_aead_walk_virt_block() above. In the 4.10 kernel + * this is starting to be cleaned up...) + */ +int blkcipher_ablkcipher_walk_virt(struct blkcipher_desc *desc, + struct blkcipher_walk *walk, + struct crypto_ablkcipher *tfm) +{ + walk->flags &= ~BLKCIPHER_WALK_PHYS; + walk->walk_blocksize = crypto_ablkcipher_blocksize(tfm); + walk->cipher_blocksize = walk->walk_blocksize; + walk->ivsize = crypto_ablkcipher_ivsize(tfm); + walk->alignmask = crypto_ablkcipher_alignmask(tfm); + return blkcipher_walk_first(desc, walk); +} +EXPORT_SYMBOL_GPL(blkcipher_ablkcipher_walk_virt); + static int setkey_unaligned(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen) { diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h index c9fe145f7dd3..04661e1fb625 100644 --- a/include/crypto/algapi.h +++ b/include/crypto/algapi.h @@ -202,6 +202,9 @@ int blkcipher_aead_walk_virt_block(struct blkcipher_desc *desc, struct blkcipher_walk *walk, struct crypto_aead *tfm, unsigned int blocksize); +int blkcipher_ablkcipher_walk_virt(struct blkcipher_desc *desc, + struct blkcipher_walk *walk, + struct crypto_ablkcipher *tfm); int ablkcipher_walk_done(struct ablkcipher_request *req, struct ablkcipher_walk *walk, int err); |