From: Herbert Xu herbert@gondor.apana.org.au
[ 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 --- crypto/ahash.c | 4 ++++ include/crypto/hash.h | 3 +++ 2 files changed, 7 insertions(+)
diff --git a/crypto/ahash.c b/crypto/ahash.c index b08b89ec26ec5..63960465eea17 100644 --- a/crypto/ahash.c +++ b/crypto/ahash.c @@ -489,6 +489,7 @@ 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); @@ -654,6 +655,9 @@ 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; diff --git a/include/crypto/hash.h b/include/crypto/hash.h index 2d5ea9f9ff43e..6692253f0b5be 100644 --- a/include/crypto/hash.h +++ b/include/crypto/hash.h @@ -132,6 +132,7 @@ 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 { @@ -148,6 +149,8 @@ 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; };