[CRYPTO] api: Add type-safe spawns
[linux-2.6.git] / crypto / algapi.c
index 69eb504..0f1abca 100644 (file)
@@ -377,7 +377,8 @@ void crypto_drop_spawn(struct crypto_spawn *spawn)
 }
 EXPORT_SYMBOL_GPL(crypto_drop_spawn);
 
-struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn)
+struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,
+                                   u32 mask)
 {
        struct crypto_alg *alg;
        struct crypto_alg *alg2;
@@ -396,10 +397,18 @@ struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn)
                return ERR_PTR(-EAGAIN);
        }
 
+       tfm = ERR_PTR(-EINVAL);
+       if (unlikely((alg->cra_flags ^ type) & mask))
+               goto out_put_alg;
+
        tfm = __crypto_alloc_tfm(alg);
        if (IS_ERR(tfm))
-               crypto_mod_put(alg);
+               goto out_put_alg;
+
+       return tfm;
 
+out_put_alg:
+       crypto_mod_put(alg);
        return tfm;
 }
 EXPORT_SYMBOL_GPL(crypto_spawn_tfm);