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crypto: ahash - Stop legacy tfms from using the set_virt fallback path

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Ensure that drivers that have not been converted to the ahash API
do not use the ahash_request_set_virt fallback path as they cannot
use the software fallback.

Reported-by: Eric Biggers <ebiggers@kernel.org>
Fixes: 9d7a0ab1c7 ("crypto: ahash - Handle partial blocks in API")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu
2025-06-13 16:51:38 +08:00
parent 8c8dea2664
commit 1e2b7fcd3f
2 changed files with 9 additions and 0 deletions
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3
crypto/ahash.c
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@@ -350,6 +350,9 @@ static int ahash_do_req_chain(struct ahash_request *req,
if (!crypto_ahash_need_fallback(tfm))
return -ENOSYS;
if (crypto_hash_no_export_core(tfm))
return -ENOSYS;
{
u8 state[HASH_MAX_STATESIZE];

6
include/crypto/internal/hash.h
View File

@@ -91,6 +91,12 @@ static inline bool crypto_hash_alg_needs_key(struct hash_alg_common *alg)
!(alg->base.cra_flags & CRYPTO_ALG_OPTIONAL_KEY);
}
static inline bool crypto_hash_no_export_core(struct crypto_ahash *tfm)
{
return crypto_hash_alg_common(tfm)->base.cra_flags &
CRYPTO_AHASH_ALG_NO_EXPORT_CORE;
}
int crypto_grab_ahash(struct crypto_ahash_spawn *spawn,
struct crypto_instance *inst,
const char *name, u32 type, u32 mask);