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crypto: cryptd - Add support for cloning hashes 

Allow cryptd hashes to be cloned.  The underlying hash will be cloned.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2023-04-13 14:24:25 +08:00
parent 0303b7f5df
commit cfbda734d6
1 changed files with 16 additions and 0 deletions
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16
crypto/cryptd.c
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@ -446,6 +446,21 @@ static int cryptd_hash_init_tfm(struct crypto_ahash *tfm)
return 0; return 0;
} }
static int cryptd_hash_clone_tfm(struct crypto_ahash *ntfm,
struct crypto_ahash *tfm)
{
struct cryptd_hash_ctx *nctx = crypto_ahash_ctx(ntfm);
struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm);
struct crypto_shash *hash;
hash = crypto_clone_shash(ctx->child);
if (IS_ERR(hash))
return PTR_ERR(hash);
nctx->child = hash;
return 0;
}
static void cryptd_hash_exit_tfm(struct crypto_ahash *tfm) static void cryptd_hash_exit_tfm(struct crypto_ahash *tfm)
{ {
struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm); struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm);
@ -678,6 +693,7 @@ static int cryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb,
inst->alg.halg.base.cra_ctxsize = sizeof(struct cryptd_hash_ctx); inst->alg.halg.base.cra_ctxsize = sizeof(struct cryptd_hash_ctx);
inst->alg.init_tfm = cryptd_hash_init_tfm; inst->alg.init_tfm = cryptd_hash_init_tfm;
inst->alg.clone_tfm = cryptd_hash_clone_tfm;
inst->alg.exit_tfm = cryptd_hash_exit_tfm; inst->alg.exit_tfm = cryptd_hash_exit_tfm;
inst->alg.init = cryptd_hash_init_enqueue; inst->alg.init = cryptd_hash_init_enqueue;