crypto: mcryptd - process CRYPTO_ALG_INTERNAL

The mcryptd is used as a wrapper around internal ciphers. Therefore,
the mcryptd must process the internal cipher by marking mcryptd as
internal if the underlying cipher is an internal cipher.

Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 23 insertions, 2 deletions

diff --git a/crypto/mcryptd.c b/crypto/mcryptd.c
index a8e870444ea9..fe5b495a434d 100644
--- a/crypto/mcryptd.c
+++ b/crypto/mcryptd.c
@@ -258,6 +258,20 @@ out_free_inst:
         goto out;
 }
 
+static inline void mcryptd_check_internal(struct rtattr **tb, u32 *type,
+                                          u32 *mask)
+{
+        struct crypto_attr_type *algt;
+
+        algt = crypto_get_attr_type(tb);
+        if (IS_ERR(algt))
+                return;
+        if ((algt->type & CRYPTO_ALG_INTERNAL))
+                *type |= CRYPTO_ALG_INTERNAL;
+        if ((algt->mask & CRYPTO_ALG_INTERNAL))
+                *mask |= CRYPTO_ALG_INTERNAL;
+}
+
 static int mcryptd_hash_init_tfm(struct crypto_tfm *tfm)
 {
         struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
@@ -480,9 +494,13 @@ static int mcryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb,
         struct ahash_instance *inst;
         struct shash_alg *salg;
         struct crypto_alg *alg;
+        u32 type = 0;
+        u32 mask = 0;
         int err;
 
-        salg = shash_attr_alg(tb[1], 0, 0);
+        mcryptd_check_internal(tb, &type, &mask);
+
+        salg = shash_attr_alg(tb[1], type, mask);
         if (IS_ERR(salg))
                 return PTR_ERR(salg);
 
@@ -502,7 +520,10 @@ static int mcryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb,
         if (err)
                 goto out_free_inst;
 
-        inst->alg.halg.base.cra_flags = CRYPTO_ALG_ASYNC;
+        type = CRYPTO_ALG_ASYNC;
+        if (alg->cra_flags & CRYPTO_ALG_INTERNAL)
+                type |= CRYPTO_ALG_INTERNAL;
+        inst->alg.halg.base.cra_flags = type;
 
         inst->alg.halg.digestsize = salg->digestsize;
         inst->alg.halg.base.cra_ctxsize = sizeof(struct mcryptd_hash_ctx);