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crypto: ahash - Set default reqsize from ahash_alg

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[ Upstream commit 9e01aaa1033d6e40f8d7cf4f20931a61ce9e3f04 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Herbert Xu
2025-02-16 11:07:24 +08:00
committed by Greg Kroah-Hartman
parent b1d1b09698
commit 3a0c8429ab
2 changed files with 7 additions and 0 deletions
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4
crypto/ahash.c
View File

@@ -427,6 +427,7 @@ static int crypto_ahash_init_tfm(struct crypto_tfm *tfm)
hash->setkey = ahash_nosetkey; hash->setkey = ahash_nosetkey;
crypto_ahash_set_statesize(hash, alg->halg.statesize); crypto_ahash_set_statesize(hash, alg->halg.statesize);
crypto_ahash_set_reqsize(hash, alg->reqsize);
if (tfm->__crt_alg->cra_type != &crypto_ahash_type) if (tfm->__crt_alg->cra_type != &crypto_ahash_type)
return crypto_init_shash_ops_async(tfm); return crypto_init_shash_ops_async(tfm);
@@ -599,6 +600,9 @@ static int ahash_prepare_alg(struct ahash_alg *alg)
if (alg->halg.statesize == 0) if (alg->halg.statesize == 0)
return -EINVAL; return -EINVAL;
if (alg->reqsize && alg->reqsize < alg->halg.statesize)
return -EINVAL;
err = hash_prepare_alg(&alg->halg); err = hash_prepare_alg(&alg->halg);
if (err) if (err)
return err; return err;

3
include/crypto/hash.h
View File

@@ -153,6 +153,7 @@ struct ahash_request {
* This is a counterpart to @init_tfm, used to remove * This is a counterpart to @init_tfm, used to remove
* various changes set in @init_tfm. * various changes set in @init_tfm.
* @clone_tfm: Copy transform into new object, may allocate memory. * @clone_tfm: Copy transform into new object, may allocate memory.
* @reqsize: Size of the request context.
* @halg: see struct hash_alg_common * @halg: see struct hash_alg_common
*/ */
struct ahash_alg { struct ahash_alg {
@@ -169,6 +170,8 @@ struct ahash_alg {
void (*exit_tfm)(struct crypto_ahash *tfm); void (*exit_tfm)(struct crypto_ahash *tfm);
int (*clone_tfm)(struct crypto_ahash *dst, struct crypto_ahash *src); int (*clone_tfm)(struct crypto_ahash *dst, struct crypto_ahash *src);
unsigned int reqsize;
struct hash_alg_common halg; struct hash_alg_common halg;
}; };