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crypto: hash - Add crypto_ahash_has_setkey

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This patch adds a way for ahash users to determine whether a key
is required by a crypto_ahash transform.

Cc: stable@vger.kernel.org
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2016-01-08 21:28:26 +08:00
parent a0fa2d0371
commit a5596d6332
3 changed files with 13 additions and 2 deletions
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5
crypto/ahash.c
View file

@ -451,6 +451,7 @@ static int crypto_ahash_init_tfm(struct crypto_tfm *tfm)
struct ahash_alg *alg = crypto_ahash_alg(hash);
hash->setkey = ahash_nosetkey;
hash->has_setkey = false;
hash->export = ahash_no_export;
hash->import = ahash_no_import;
@ -463,8 +464,10 @@ static int crypto_ahash_init_tfm(struct crypto_tfm *tfm)
hash->finup = alg->finup ?: ahash_def_finup;
hash->digest = alg->digest;
if (alg->setkey)
if (alg->setkey) {
hash->setkey = alg->setkey;
hash->has_setkey = true;
}
if (alg->export)
hash->export = alg->export;
if (alg->import)

4
crypto/shash.c
View file

@ -355,8 +355,10 @@ int crypto_init_shash_ops_async(struct crypto_tfm *tfm)
crt->finup = shash_async_finup;
crt->digest = shash_async_digest;
if (alg->setkey)
if (alg->setkey) {
crt->setkey = shash_async_setkey;
crt->has_setkey = true;
}
if (alg->export)
crt->export = shash_async_export;
if (alg->import)

6
include/crypto/hash.h
View file

@ -204,6 +204,7 @@ struct crypto_ahash {
unsigned int keylen);
unsigned int reqsize;
bool has_setkey;
struct crypto_tfm base;
};
@ -375,6 +376,11 @@ static inline void *ahash_request_ctx(struct ahash_request *req)
int crypto_ahash_setkey(struct crypto_ahash *tfm, const u8 *key,
unsigned int keylen);
static inline bool crypto_ahash_has_setkey(struct crypto_ahash *tfm)
{
return tfm->has_setkey;
}
/**
* crypto_ahash_finup() - update and finalize message digest
* @req: reference to the ahash_request handle that holds all information