Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

[linux-2.6.git] / crypto / khazad.c

diff --git a/crypto/khazad.c b/crypto/khazad.c
index 738cb0dd1e7cdc7618ba39e9c30fa5cd30b982b9..527e4e395fc32f8f0d271b372ed93941fb6e1bcc 100644 (file)
--- a/crypto/khazad.c
+++ b/crypto/khazad.c
@@ -22,8 +22,9 @@
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/mm.h>
-#include <asm/scatterlist.h>
+#include <asm/byteorder.h>
 #include <linux/crypto.h>
+#include <linux/types.h>
 
 #define KHAZAD_KEY_SIZE                16
 #define KHAZAD_BLOCK_SIZE      8
@@ -752,37 +753,18 @@ static const u64 c[KHAZAD_ROUNDS + 1] = {
        0xccc41d14c363da5dULL, 0x5fdc7dcd7f5a6c5cULL, 0xf726ffede89d6f8eULL
 };
 
-static int khazad_setkey(void *ctx_arg, const u8 *in_key,
-                       unsigned int key_len, u32 *flags)
+static int khazad_setkey(struct crypto_tfm *tfm, const u8 *in_key,
+                        unsigned int key_len)
 {
-
-       struct khazad_ctx *ctx = ctx_arg;
+       struct khazad_ctx *ctx = crypto_tfm_ctx(tfm);
+       const __be32 *key = (const __be32 *)in_key;
        int r;
        const u64 *S = T7;
        u64 K2, K1;
-       
-       if (key_len != 16)
-       {
-               *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
-               return -EINVAL;
-       }
 
-       K2 = ((u64)in_key[ 0] << 56) ^
-            ((u64)in_key[ 1] << 48) ^
-            ((u64)in_key[ 2] << 40) ^
-            ((u64)in_key[ 3] << 32) ^
-            ((u64)in_key[ 4] << 24) ^
-            ((u64)in_key[ 5] << 16) ^
-            ((u64)in_key[ 6] <<  8) ^
-            ((u64)in_key[ 7]      );
-       K1 = ((u64)in_key[ 8] << 56) ^
-            ((u64)in_key[ 9] << 48) ^
-            ((u64)in_key[10] << 40) ^
-            ((u64)in_key[11] << 32) ^
-            ((u64)in_key[12] << 24) ^
-            ((u64)in_key[13] << 16) ^
-            ((u64)in_key[14] <<  8) ^
-            ((u64)in_key[15]      );
+       /* key is supposed to be 32-bit aligned */
+       K2 = ((u64)be32_to_cpu(key[0]) << 32) | be32_to_cpu(key[1]);
+       K1 = ((u64)be32_to_cpu(key[2]) << 32) | be32_to_cpu(key[3]);
 
        /* setup the encrypt key */
        for (r = 0; r <= KHAZAD_ROUNDS; r++) {
@@ -820,19 +802,12 @@ static int khazad_setkey(void *ctx_arg, const u8 *in_key,
 static void khazad_crypt(const u64 roundKey[KHAZAD_ROUNDS + 1],
                u8 *ciphertext, const u8 *plaintext)
 {
-
+       const __be64 *src = (const __be64 *)plaintext;
+       __be64 *dst = (__be64 *)ciphertext;
        int r;
        u64 state;
 
-       state = ((u64)plaintext[0] << 56) ^
-               ((u64)plaintext[1] << 48) ^
-               ((u64)plaintext[2] << 40) ^
-               ((u64)plaintext[3] << 32) ^
-               ((u64)plaintext[4] << 24) ^
-               ((u64)plaintext[5] << 16) ^
-               ((u64)plaintext[6] <<  8) ^
-               ((u64)plaintext[7]      ) ^
-               roundKey[0];
+       state = be64_to_cpu(*src) ^ roundKey[0];
 
        for (r = 1; r < KHAZAD_ROUNDS; r++) {
                state = T0[(int)(state >> 56)       ] ^
@@ -856,26 +831,18 @@ static void khazad_crypt(const u64 roundKey[KHAZAD_ROUNDS + 1],
                (T7[(int)(state      ) & 0xff] & 0x00000000000000ffULL) ^
                roundKey[KHAZAD_ROUNDS];
 
-       ciphertext[0] = (u8)(state >> 56);
-       ciphertext[1] = (u8)(state >> 48);
-       ciphertext[2] = (u8)(state >> 40);
-       ciphertext[3] = (u8)(state >> 32);
-       ciphertext[4] = (u8)(state >> 24);
-       ciphertext[5] = (u8)(state >> 16);
-       ciphertext[6] = (u8)(state >>  8);
-       ciphertext[7] = (u8)(state      );
-
+       *dst = cpu_to_be64(state);
 }
 
-static void khazad_encrypt(void *ctx_arg, u8 *dst, const u8 *src)
+static void khazad_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
 {
-       struct khazad_ctx *ctx = ctx_arg;
+       struct khazad_ctx *ctx = crypto_tfm_ctx(tfm);
        khazad_crypt(ctx->E, dst, src);
 }
 
-static void khazad_decrypt(void *ctx_arg, u8 *dst, const u8 *src)
+static void khazad_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
 {
-       struct khazad_ctx *ctx = ctx_arg;
+       struct khazad_ctx *ctx = crypto_tfm_ctx(tfm);
        khazad_crypt(ctx->D, dst, src);
 }
 
@@ -884,6 +851,7 @@ static struct crypto_alg khazad_alg = {
        .cra_flags              =       CRYPTO_ALG_TYPE_CIPHER,
        .cra_blocksize          =       KHAZAD_BLOCK_SIZE,
        .cra_ctxsize            =       sizeof (struct khazad_ctx),
+       .cra_alignmask          =       7,
        .cra_module             =       THIS_MODULE,
        .cra_list               =       LIST_HEAD_INIT(khazad_alg.cra_list),
        .cra_u                  =       { .cipher = {
@@ -894,7 +862,7 @@ static struct crypto_alg khazad_alg = {
        .cia_decrypt            =       khazad_decrypt } }
 };
 
-static int __init init(void)
+static int __init khazad_mod_init(void)
 {
        int ret = 0;
        
@@ -902,14 +870,14 @@ static int __init init(void)
        return ret;
 }
 
-static void __exit fini(void)
+static void __exit khazad_mod_fini(void)
 {
        crypto_unregister_alg(&khazad_alg);
 }
 
 
-module_init(init);
-module_exit(fini);
+module_init(khazad_mod_init);
+module_exit(khazad_mod_fini);
 
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("Khazad Cryptographic Algorithm");