[CRYPTO] api: Allow algorithm lookup by type

This patch also adds the infrastructure to pick an algorithm based on
their type.  For example, this allows you to select the encryption
algorithm "aes", instead of any algorithm registered under the name
"aes".  For now this is only accessible internally.  Eventually it
will be made available through crypto_alloc_tfm.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 2 deletions

diff --git a/crypto/internal.h b/crypto/internal.h
index 3a08d25fba45..c08d93bdadc4 100644
--- a/crypto/internal.h
+++ b/crypto/internal.h
@@ -43,6 +43,7 @@ struct crypto_larval {
         struct crypto_alg alg;
         struct crypto_alg *adult;
         struct completion completion;
+        u32 mask;
 };
 
 extern struct list_head crypto_alg_list;
@@ -124,7 +125,8 @@ static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg,
 
 struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
 void crypto_mod_put(struct crypto_alg *alg);
-struct crypto_alg *__crypto_alg_lookup(const char *name);
+struct crypto_alg *__crypto_alg_lookup(const char *name, u32 type, u32 mask);
+struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
 
 int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags);
 int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags);
@@ -138,7 +140,7 @@ void crypto_exit_digest_ops(struct crypto_tfm *tfm);
 void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
 void crypto_exit_compress_ops(struct crypto_tfm *tfm);
 
-void crypto_larval_error(const char *name);
+void crypto_larval_error(const char *name, u32 type, u32 mask);
 
 int crypto_register_instance(struct crypto_template *tmpl,
                              struct crypto_instance *inst);