crypto: akcipher - add akcipher declarations needed by templates.

Add a struct akcipher_instance and struct akcipher_spawn similar to
how AEAD declares them and the macros for converting to/from
crypto_instance/crypto_spawn.  Also add register functions to
avoid exposing crypto_akcipher_type.

Signed-off-by: Andrew Zaborowski <andrew.zaborowski@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 33 insertions, 1 deletions

diff --git a/crypto/akcipher.c b/crypto/akcipher.c
index 120ec04..def301e 100644
--- a/crypto/akcipher.c
+++ b/crypto/akcipher.c
@@ -21,6 +21,7 @@
 #include <linux/cryptouser.h>
 #include <net/netlink.h>
 #include <crypto/akcipher.h>
+#include <crypto/internal/akcipher.h>
 #include "internal.h"
 
 #ifdef CONFIG_NET
@@ -75,9 +76,17 @@ static int crypto_akcipher_init_tfm(struct crypto_tfm *tfm)
 	return 0;
 }
 
+static void crypto_akcipher_free_instance(struct crypto_instance *inst)
+{
+	struct akcipher_instance *akcipher = akcipher_instance(inst);
+
+	akcipher->free(akcipher);
+}
+
 static const struct crypto_type crypto_akcipher_type = {
 	.extsize = crypto_alg_extsize,
 	.init_tfm = crypto_akcipher_init_tfm,
+	.free = crypto_akcipher_free_instance,
 #ifdef CONFIG_PROC_FS
 	.show = crypto_akcipher_show,
 #endif
@@ -88,6 +97,14 @@ static const struct crypto_type crypto_akcipher_type = {
 	.tfmsize = offsetof(struct crypto_akcipher, base),
 };
 
+int crypto_grab_akcipher(struct crypto_akcipher_spawn *spawn, const char *name,
+			 u32 type, u32 mask)
+{
+	spawn->base.frontend = &crypto_akcipher_type;
+	return crypto_grab_spawn(&spawn->base, name, type, mask);
+}
+EXPORT_SYMBOL_GPL(crypto_grab_akcipher);
+
 struct crypto_akcipher *crypto_alloc_akcipher(const char *alg_name, u32 type,
 					      u32 mask)
 {
@@ -95,13 +112,20 @@ struct crypto_akcipher *crypto_alloc_akcipher(const char *alg_name, u32 type,
 }
 EXPORT_SYMBOL_GPL(crypto_alloc_akcipher);
 
-int crypto_register_akcipher(struct akcipher_alg *alg)
+static void akcipher_prepare_alg(struct akcipher_alg *alg)
 {
 	struct crypto_alg *base = &alg->base;
 
 	base->cra_type = &crypto_akcipher_type;
 	base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
 	base->cra_flags |= CRYPTO_ALG_TYPE_AKCIPHER;
+}
+
+int crypto_register_akcipher(struct akcipher_alg *alg)
+{
+	struct crypto_alg *base = &alg->base;
+
+	akcipher_prepare_alg(alg);
 	return crypto_register_alg(base);
 }
 EXPORT_SYMBOL_GPL(crypto_register_akcipher);
@@ -112,5 +136,13 @@ void crypto_unregister_akcipher(struct akcipher_alg *alg)
 }
 EXPORT_SYMBOL_GPL(crypto_unregister_akcipher);
 
+int akcipher_register_instance(struct crypto_template *tmpl,
+			       struct akcipher_instance *inst)
+{
+	akcipher_prepare_alg(&inst->alg);
+	return crypto_register_instance(tmpl, akcipher_crypto_instance(inst));
+}
+EXPORT_SYMBOL_GPL(akcipher_register_instance);
+
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("Generic public key cipher type");