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crypto: hash - introduce crypto_hash_alg_has_setkey()

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Templates that use an shash spawn can use crypto_shash_alg_has_setkey()
to determine whether the underlying algorithm requires a key or not.
But there was no corresponding function for ahash spawns.  Add it.

Note that the new function actually has to support both shash and ahash
algorithms, since the ahash API can be used with either.

Cc: [email protected]
Signed-off-by: Eric Biggers <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
This commit is contained in:
Eric Biggers 2018-01-03 11:16:22 -08:00 • committed by Herbert Xu
commit cd6ed77ad5
2 changed files with 13 additions and 0 deletions
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11
crypto/ahash.c
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@ -649,5 +649,16 @@ struct hash_alg_common *ahash_attr_alg(struct rtattr *rta, u32 type, u32 mask)
}
EXPORT_SYMBOL_GPL(ahash_attr_alg);
bool crypto_hash_alg_has_setkey(struct hash_alg_common *halg)
{
struct crypto_alg *alg = &halg->base;
if (alg->cra_type != &crypto_ahash_type)
return crypto_shash_alg_has_setkey(__crypto_shash_alg(alg));
return __crypto_ahash_alg(alg)->setkey != NULL;
}
EXPORT_SYMBOL_GPL(crypto_hash_alg_has_setkey);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Asynchronous cryptographic hash type");