crypto: api - Add crypto_attr_alg2 helper

[karo-tx-linux.git] / crypto / api.c

diff --git a/crypto/api.c b/crypto/api.c
index d5944f92b4162845e305c9dc6f2df85576808240..ba81221b3bef77ec1d64805aebf47f7c53bbc4a2 100644 (file)
--- a/crypto/api.c
+++ b/crypto/api.c
@@ -503,6 +503,27 @@ out:
 }
 EXPORT_SYMBOL_GPL(crypto_create_tfm);
 
+struct crypto_alg *crypto_find_alg(const char *alg_name,
+                                  const struct crypto_type *frontend,
+                                  u32 type, u32 mask)
+{
+       struct crypto_alg *(*lookup)(const char *name, u32 type, u32 mask) =
+               crypto_alg_mod_lookup;
+
+       if (frontend) {
+               type &= frontend->maskclear;
+               mask &= frontend->maskclear;
+               type |= frontend->type;
+               mask |= frontend->maskset;
+
+               if (frontend->lookup)
+                       lookup = frontend->lookup;
+       }
+
+       return lookup(alg_name, type, mask);
+}
+EXPORT_SYMBOL_GPL(crypto_find_alg);
+
 /*
  *     crypto_alloc_tfm - Locate algorithm and allocate transform
  *     @alg_name: Name of algorithm
@@ -526,21 +547,13 @@ EXPORT_SYMBOL_GPL(crypto_create_tfm);
 void *crypto_alloc_tfm(const char *alg_name,
                       const struct crypto_type *frontend, u32 type, u32 mask)
 {
-       struct crypto_alg *(*lookup)(const char *name, u32 type, u32 mask);
        void *tfm;
        int err;
 
-       type &= frontend->maskclear;
-       mask &= frontend->maskclear;
-       type |= frontend->type;
-       mask |= frontend->maskset;
-
-       lookup = frontend->lookup ?: crypto_alg_mod_lookup;
-
        for (;;) {
                struct crypto_alg *alg;
 
-               alg = lookup(alg_name, type, mask);
+               alg = crypto_find_alg(alg_name, frontend, type, mask);
                if (IS_ERR(alg)) {
                        err = PTR_ERR(alg);
                        goto err;