crypto: xcbc - Use crypto_xor

This patch replaces the local xor function with the generic
crypto_xor function.

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

1 files changed, 6 insertions, 16 deletions

diff --git a/crypto/xcbc.c b/crypto/xcbc.c
index 3b991bf2fd9..9d502e67a5c 100644
--- a/crypto/xcbc.c
+++ b/crypto/xcbc.c
@@ -47,19 +47,10 @@ struct crypto_xcbc_ctx {
         u8 *prev;
         u8 *key;
         u8 *consts;
-        void (*xor)(u8 *a, const u8 *b, unsigned int bs);
         unsigned int keylen;
         unsigned int len;
 };
 
-static void xor_128(u8 *a, const u8 *b, unsigned int bs)
-{
-        ((u32 *)a)[0] ^= ((u32 *)b)[0];
-        ((u32 *)a)[1] ^= ((u32 *)b)[1];
-        ((u32 *)a)[2] ^= ((u32 *)b)[2];
-        ((u32 *)a)[3] ^= ((u32 *)b)[3];
-}
-
 static int _crypto_xcbc_digest_setkey(struct crypto_shash *parent,
                                       struct crypto_xcbc_ctx *ctx)
 {
@@ -122,7 +113,7 @@ static int crypto_xcbc_digest_update(struct shash_desc *pdesc, const u8 *p,
         len -= bs - ctx->len;
         p += bs - ctx->len;
 
-        ctx->xor(ctx->prev, ctx->odds, bs);
+        crypto_xor(ctx->prev, ctx->odds, bs);
         crypto_cipher_encrypt_one(tfm, ctx->prev, ctx->prev);
 
         /* clearing the length */
@@ -130,7 +121,7 @@ static int crypto_xcbc_digest_update(struct shash_desc *pdesc, const u8 *p,
 
         /* encrypting the rest of data */
         while (len > bs) {
-                ctx->xor(ctx->prev, p, bs);
+                crypto_xor(ctx->prev, p, bs);
                 crypto_cipher_encrypt_one(tfm, ctx->prev, ctx->prev);
                 p += bs;
                 len -= bs;
@@ -162,8 +153,8 @@ static int crypto_xcbc_digest_final(struct shash_desc *pdesc, u8 *out)
                 crypto_cipher_encrypt_one(tfm, key2,
                                           (u8 *)(ctx->consts + bs));
 
-                ctx->xor(ctx->prev, ctx->odds, bs);
-                ctx->xor(ctx->prev, key2, bs);
+                crypto_xor(ctx->prev, ctx->odds, bs);
+                crypto_xor(ctx->prev, key2, bs);
                 _crypto_xcbc_digest_setkey(parent, ctx);
 
                 crypto_cipher_encrypt_one(tfm, out, ctx->prev);
@@ -184,8 +175,8 @@ static int crypto_xcbc_digest_final(struct shash_desc *pdesc, u8 *out)
                 crypto_cipher_encrypt_one(tfm, key3,
                                           (u8 *)(ctx->consts + bs * 2));
 
-                ctx->xor(ctx->prev, ctx->odds, bs);
-                ctx->xor(ctx->prev, key3, bs);
+                crypto_xor(ctx->prev, ctx->odds, bs);
+                crypto_xor(ctx->prev, key3, bs);
 
                 _crypto_xcbc_digest_setkey(parent, ctx);
 
@@ -209,7 +200,6 @@ static int xcbc_init_tfm(struct crypto_tfm *tfm)
 
         switch(bs) {
         case 16:
-                ctx->xor = xor_128;
                 break;
         default:
                 return -EINVAL;