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author | Herbert Xu <herbert@gondor.apana.org.au> | 2009-07-12 21:25:20 +0800 |
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committer | Herbert Xu <herbert@gondor.apana.org.au> | 2009-07-14 12:58:08 +0800 |
commit | 7eddf95ec5440d60f10963f453e27f82f394044e (patch) | |
tree | 4b1ba4bbf01f381a45d5bd6d26811f51ab81a3ff | |
parent | 6941c3a0aabb6ad4167827360f384e9daed7dd7f (diff) | |
download | linux-stable-7eddf95ec5440d60f10963f453e27f82f394044e.tar.gz linux-stable-7eddf95ec5440d60f10963f453e27f82f394044e.tar.bz2 linux-stable-7eddf95ec5440d60f10963f453e27f82f394044e.zip |
crypto: shash - Export async functions
This patch exports the async functions so that they can be reused
by cryptd when it switches over to using shash.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
-rw-r--r-- | crypto/shash.c | 42 | ||||
-rw-r--r-- | include/crypto/internal/hash.h | 3 |
2 files changed, 25 insertions, 20 deletions
diff --git a/crypto/shash.c b/crypto/shash.c index d8e0f8f8d672..3b1b06b3dcf3 100644 --- a/crypto/shash.c +++ b/crypto/shash.c @@ -202,9 +202,8 @@ static int shash_async_init(struct ahash_request *req) return crypto_shash_init(desc); } -static int shash_async_update(struct ahash_request *req) +int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc) { - struct shash_desc *desc = ahash_request_ctx(req); struct crypto_hash_walk walk; int nbytes; @@ -214,13 +213,19 @@ static int shash_async_update(struct ahash_request *req) return nbytes; } +EXPORT_SYMBOL_GPL(shash_ahash_update); + +static int shash_async_update(struct ahash_request *req) +{ + return shash_ahash_update(req, ahash_request_ctx(req)); +} static int shash_async_final(struct ahash_request *req) { return crypto_shash_final(ahash_request_ctx(req), req->result); } -static int shash_async_digest(struct ahash_request *req) +int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc) { struct scatterlist *sg = req->src; unsigned int offset = sg->offset; @@ -228,34 +233,31 @@ static int shash_async_digest(struct ahash_request *req) int err; if (nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset)) { - struct crypto_shash **ctx = - crypto_ahash_ctx(crypto_ahash_reqtfm(req)); - struct shash_desc *desc = ahash_request_ctx(req); void *data; - desc->tfm = *ctx; - desc->flags = req->base.flags; - data = crypto_kmap(sg_page(sg), 0); err = crypto_shash_digest(desc, data + offset, nbytes, req->result); crypto_kunmap(data, 0); crypto_yield(desc->flags); - goto out; - } + } else + err = crypto_shash_init(desc) ?: + shash_ahash_update(req, desc) ?: + crypto_shash_final(desc, req->result); - err = shash_async_init(req); - if (err) - goto out; + return err; +} +EXPORT_SYMBOL_GPL(shash_ahash_digest); - err = shash_async_update(req); - if (err) - goto out; +static int shash_async_digest(struct ahash_request *req) +{ + struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); + struct shash_desc *desc = ahash_request_ctx(req); - err = shash_async_final(req); + desc->tfm = *ctx; + desc->flags = req->base.flags; -out: - return err; + return shash_ahash_digest(req, desc); } static void crypto_exit_shash_ops_async(struct crypto_tfm *tfm) diff --git a/include/crypto/internal/hash.h b/include/crypto/internal/hash.h index 2d1b10f23c91..6e283495374e 100644 --- a/include/crypto/internal/hash.h +++ b/include/crypto/internal/hash.h @@ -63,6 +63,9 @@ int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn, struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask); +int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc); +int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc); + static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm) { return crypto_tfm_ctx(&tfm->base); |