crypto: null - Switch to shash

This patch changes digest_null to the new shash interface.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

2 files changed, 42 insertions, 23 deletions

diff --git a/crypto/Kconfig b/crypto/Kconfig
index aede80246df..359a7c24af3 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -102,6 +102,7 @@ config CRYPTO_NULL
         tristate "Null algorithms"
         select CRYPTO_ALGAPI
         select CRYPTO_BLKCIPHER
+        select CRYPTO_HASH
         help
           These are 'Null' algorithms, used by IPsec, which do nothing.
 
diff --git a/crypto/crypto_null.c b/crypto/crypto_null.c
index 1f7d53013a2..cb71c9122bc 100644
--- a/crypto/crypto_null.c
+++ b/crypto/crypto_null.c
@@ -17,6 +17,7 @@
  *
  */
 
+#include <crypto/internal/hash.h>
 #include <crypto/internal/skcipher.h>
 #include <linux/init.h>
 #include <linux/module.h>
@@ -38,15 +39,31 @@ static int null_compress(struct crypto_tfm *tfm, const u8 *src,
         return 0;
 }
 
-static void null_init(struct crypto_tfm *tfm)
-{ }
+static int null_init(struct shash_desc *desc)
+{
+        return 0;
+}
 
-static void null_update(struct crypto_tfm *tfm, const u8 *data,
-                        unsigned int len)
-{ }
+static int null_update(struct shash_desc *desc, const u8 *data,
+                       unsigned int len)
+{
+        return 0;
+}
 
-static void null_final(struct crypto_tfm *tfm, u8 *out)
-{ }
+static int null_final(struct shash_desc *desc, u8 *out)
+{
+        return 0;
+}
+
+static int null_digest(struct shash_desc *desc, const u8 *data,
+                       unsigned int len, u8 *out)
+{
+        return 0;
+}
+
+static int null_hash_setkey(struct crypto_shash *tfm, const u8 *key,
+                            unsigned int keylen)
+{ return 0; }
 
 static int null_setkey(struct crypto_tfm *tfm, const u8 *key,
                        unsigned int keylen)
@@ -89,19 +106,20 @@ static struct crypto_alg compress_null = {
         .coa_decompress         =       null_compress } }
 };
 
-static struct crypto_alg digest_null = {
-        .cra_name               =       "digest_null",
-        .cra_flags              =       CRYPTO_ALG_TYPE_DIGEST,
-        .cra_blocksize          =       NULL_BLOCK_SIZE,
-        .cra_ctxsize            =       0,
-        .cra_module             =       THIS_MODULE,
-        .cra_list               =       LIST_HEAD_INIT(digest_null.cra_list),   
-        .cra_u                  =       { .digest = {
-        .dia_digestsize         =       NULL_DIGEST_SIZE,
-        .dia_setkey             =       null_setkey,
-        .dia_init               =       null_init,
-        .dia_update             =       null_update,
-        .dia_final              =       null_final } }
+static struct shash_alg digest_null = {
+        .digestsize             =       NULL_DIGEST_SIZE,
+        .setkey                 =       null_hash_setkey,
+        .init                   =       null_init,
+        .update                 =       null_update,
+        .finup                  =       null_digest,
+        .digest                 =       null_digest,
+        .final                  =       null_final,
+        .base                   =       {
+                .cra_name               =       "digest_null",
+                .cra_flags              =       CRYPTO_ALG_TYPE_SHASH,
+                .cra_blocksize          =       NULL_BLOCK_SIZE,
+                .cra_module             =       THIS_MODULE,
+        }
 };
 
 static struct crypto_alg cipher_null = {
@@ -154,7 +172,7 @@ static int __init crypto_null_mod_init(void)
         if (ret < 0)
                 goto out_unregister_cipher;
 
-        ret = crypto_register_alg(&digest_null);
+        ret = crypto_register_shash(&digest_null);
         if (ret < 0)
                 goto out_unregister_skcipher;
 
@@ -166,7 +184,7 @@ out:
         return ret;
 
 out_unregister_digest:
-        crypto_unregister_alg(&digest_null);
+        crypto_unregister_shash(&digest_null);
 out_unregister_skcipher:
         crypto_unregister_alg(&skcipher_null);
 out_unregister_cipher:
@@ -177,7 +195,7 @@ out_unregister_cipher:
 static void __exit crypto_null_mod_fini(void)
 {
         crypto_unregister_alg(&compress_null);
-        crypto_unregister_alg(&digest_null);
+        crypto_unregister_shash(&digest_null);
         crypto_unregister_alg(&skcipher_null);
         crypto_unregister_alg(&cipher_null);
 }