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crypto: rng - Ensure set_ent is always present

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Ensure that set_ent is always set since only drbg provides it.

Fixes: 77ebdabe8d ("crypto: af_alg - add extra parameters for DRBG interface")
Reported-by: Yiqi Sun <sunyiqixm@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu
2025-10-02 17:45:39 +08:00
parent ca1354f799
commit c0d36727bf
1 changed files with 8 additions and 0 deletions
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8
crypto/rng.c
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@@ -168,6 +168,11 @@ out:
EXPORT_SYMBOL_GPL(crypto_del_default_rng); EXPORT_SYMBOL_GPL(crypto_del_default_rng);
#endif #endif
static void rng_default_set_ent(struct crypto_rng *tfm, const u8 *data,
unsigned int len)
{
}
int crypto_register_rng(struct rng_alg *alg) int crypto_register_rng(struct rng_alg *alg)
{ {
struct crypto_alg *base = &alg->base; struct crypto_alg *base = &alg->base;
@@ -179,6 +184,9 @@ int crypto_register_rng(struct rng_alg *alg)
base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
base->cra_flags |= CRYPTO_ALG_TYPE_RNG; base->cra_flags |= CRYPTO_ALG_TYPE_RNG;
if (!alg->set_ent)
alg->set_ent = rng_default_set_ent;
return crypto_register_alg(base); return crypto_register_alg(base);
} }
EXPORT_SYMBOL_GPL(crypto_register_rng); EXPORT_SYMBOL_GPL(crypto_register_rng);