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crypto: ahash - Set default reqsize from ahash_alg

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Add a reqsize field to struct ahash_alg and use it to set the
default reqsize so that algorithms with a static reqsize are
not forced to create an init_tfm function.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2025-02-16 11:07:24 +08:00
parent 439963cdc3
commit 9e01aaa103
2 changed files with 7 additions and 0 deletions
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4
crypto/ahash.c
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@ -879,6 +879,7 @@ static int crypto_ahash_init_tfm(struct crypto_tfm *tfm)
struct ahash_alg *alg = crypto_ahash_alg(hash);
crypto_ahash_set_statesize(hash, alg->halg.statesize);
crypto_ahash_set_reqsize(hash, alg->reqsize);
if (tfm->__crt_alg->cra_type == &crypto_shash_type)
return crypto_init_ahash_using_shash(tfm);
@ -1044,6 +1045,9 @@ static int ahash_prepare_alg(struct ahash_alg *alg)
if (alg->halg.statesize == 0)
return -EINVAL;
if (alg->reqsize && alg->reqsize < alg->halg.statesize)
return -EINVAL;
err = hash_prepare_alg(&alg->halg);
if (err)
return err;

3
include/crypto/hash.h
View File

@ -135,6 +135,7 @@ struct ahash_request {
* This is a counterpart to @init_tfm, used to remove
* various changes set in @init_tfm.
* @clone_tfm: Copy transform into new object, may allocate memory.
* @reqsize: Size of the request context.
* @halg: see struct hash_alg_common
*/
struct ahash_alg {
@ -151,6 +152,8 @@ struct ahash_alg {
void (*exit_tfm)(struct crypto_ahash *tfm);
int (*clone_tfm)(struct crypto_ahash *dst, struct crypto_ahash *src);
unsigned int reqsize;
struct hash_alg_common halg;
};