lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

crypto: ahash - Add unaligned handling and default operations

Browse Source 
This patch exports the finup operation where available and adds
a default finup operation for ahash.  The operations final, finup
and digest also will now deal with unaligned result pointers by
copying it.  Finally export/import operations are will now be
exported too.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu
2009-07-15 12:40:40 +08:00
parent 093900c2b9
commit 66f6ce5e52
4 changed files with 263 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files

52
crypto/shash.c
View File

@@ -235,6 +235,33 @@ static int shash_async_final(struct ahash_request *req)
return crypto_shash_final(ahash_request_ctx(req), req->result);
}
int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc)
{
struct crypto_hash_walk walk;
int nbytes;
for (nbytes = crypto_hash_walk_first(req, &walk); nbytes > 0;
nbytes = crypto_hash_walk_done(&walk, nbytes))
nbytes = crypto_hash_walk_last(&walk) ?
crypto_shash_finup(desc, walk.data, nbytes,
req->result) :
crypto_shash_update(desc, walk.data, nbytes);
return nbytes;
}
EXPORT_SYMBOL_GPL(shash_ahash_finup);
static int shash_async_finup(struct ahash_request *req)
{
struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req));
struct shash_desc *desc = ahash_request_ctx(req);
desc->tfm = *ctx;
desc->flags = req->base.flags;
return shash_ahash_finup(req, desc);
}
int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc)
{
struct scatterlist *sg = req->src;
@@ -252,8 +279,7 @@ int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc)
crypto_yield(desc->flags);
} else
err = crypto_shash_init(desc) ?:
shash_ahash_update(req, desc) ?:
crypto_shash_final(desc, req->result);
shash_ahash_finup(req, desc);
return err;
}
@@ -270,6 +296,16 @@ static int shash_async_digest(struct ahash_request *req)
return shash_ahash_digest(req, desc);
}
static int shash_async_export(struct ahash_request *req, void *out)
{
return crypto_shash_export(ahash_request_ctx(req), out);
}
static int shash_async_import(struct ahash_request *req, const void *in)
{
return crypto_shash_import(ahash_request_ctx(req), in);
}
static void crypto_exit_shash_ops_async(struct crypto_tfm *tfm)
{
struct crypto_shash **ctx = crypto_tfm_ctx(tfm);
@@ -280,6 +316,7 @@ static void crypto_exit_shash_ops_async(struct crypto_tfm *tfm)
int crypto_init_shash_ops_async(struct crypto_tfm *tfm)
{
struct crypto_alg *calg = tfm->__crt_alg;
struct shash_alg *alg = __crypto_shash_alg(calg);
struct crypto_ahash *crt = __crypto_ahash_cast(tfm);
struct crypto_shash **ctx = crypto_tfm_ctx(tfm);
struct crypto_shash *shash;
@@ -298,9 +335,16 @@ int crypto_init_shash_ops_async(struct crypto_tfm *tfm)
crt->init = shash_async_init;
crt->update = shash_async_update;
crt->final = shash_async_final;
crt->final = shash_async_final;
crt->finup = shash_async_finup;
crt->digest = shash_async_digest;
crt->setkey = shash_async_setkey;
if (alg->setkey)
crt->setkey = shash_async_setkey;
if (alg->export)
crt->export = shash_async_export;
if (alg->setkey)
crt->import = shash_async_import;
crt->reqsize = sizeof(struct shash_desc) + crypto_shash_descsize(shash);