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crypto: doc - Fix hash export state information

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The documentation states that crypto_ahash_reqsize() provides the size
of the state structure used by crypto_ahash_export().  But it's actually
crypto_ahash_statesize() which provides this size.

Signed-off-by: Rabin Vincent <rabinv@axis.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Rabin Vincent 2017-01-26 16:33:00 +01:00 committed by Herbert Xu
parent 34cb582139
commit 379d972b81
2 changed files with 13 additions and 7 deletions
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2
Documentation/crypto/api-digest.rst
View File

@ -14,7 +14,7 @@ Asynchronous Message Digest API
:doc: Asynchronous Message Digest API :doc: Asynchronous Message Digest API
.. kernel-doc:: include/crypto/hash.h .. kernel-doc:: include/crypto/hash.h
:functions: crypto_alloc_ahash crypto_free_ahash crypto_ahash_init crypto_ahash_digestsize crypto_ahash_reqtfm crypto_ahash_reqsize crypto_ahash_setkey crypto_ahash_finup crypto_ahash_final crypto_ahash_digest crypto_ahash_export crypto_ahash_import :functions: crypto_alloc_ahash crypto_free_ahash crypto_ahash_init crypto_ahash_digestsize crypto_ahash_reqtfm crypto_ahash_reqsize crypto_ahash_statesize crypto_ahash_setkey crypto_ahash_finup crypto_ahash_final crypto_ahash_digest crypto_ahash_export crypto_ahash_import
Asynchronous Hash Request Handle Asynchronous Hash Request Handle
-------------------------------- --------------------------------

18
include/crypto/hash.h
View File

@ -329,6 +329,16 @@ static inline unsigned int crypto_ahash_digestsize(struct crypto_ahash *tfm)
return crypto_hash_alg_common(tfm)->digestsize; return crypto_hash_alg_common(tfm)->digestsize;
} }
/**
* crypto_ahash_statesize() - obtain size of the ahash state
* @tfm: cipher handle
*
* Return the size of the ahash state. With the crypto_ahash_export()
* function, the caller can export the state into a buffer whose size is
* defined with this function.
*
* Return: size of the ahash state
*/
static inline unsigned int crypto_ahash_statesize(struct crypto_ahash *tfm) static inline unsigned int crypto_ahash_statesize(struct crypto_ahash *tfm)
{ {
return crypto_hash_alg_common(tfm)->statesize; return crypto_hash_alg_common(tfm)->statesize;
@ -369,11 +379,7 @@ static inline struct crypto_ahash *crypto_ahash_reqtfm(
* crypto_ahash_reqsize() - obtain size of the request data structure * crypto_ahash_reqsize() - obtain size of the request data structure
* @tfm: cipher handle * @tfm: cipher handle
* *
* Return the size of the ahash state size. With the crypto_ahash_export * Return: size of the request data
* function, the caller can export the state into a buffer whose size is
* defined with this function.
*
* Return: size of the ahash state
*/ */
static inline unsigned int crypto_ahash_reqsize(struct crypto_ahash *tfm) static inline unsigned int crypto_ahash_reqsize(struct crypto_ahash *tfm)
{ {
@ -453,7 +459,7 @@ int crypto_ahash_digest(struct ahash_request *req);
* *
* This function exports the hash state of the ahash_request handle into the * This function exports the hash state of the ahash_request handle into the
* caller-allocated output buffer out which must have sufficient size (e.g. by * caller-allocated output buffer out which must have sufficient size (e.g. by
* calling crypto_ahash_reqsize). * calling crypto_ahash_statesize()).
* *
* Return: 0 if the export was successful; < 0 if an error occurred * Return: 0 if the export was successful; < 0 if an error occurred
*/ */