X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=crypto%2Fsha256_generic.c;h=5a8dd47558e566752d9d3cbd02231fd981be0a4e;hb=114e9e89e668ec561c9b0f3dea7bcc8af7c29d21;hp=74bf2f95f4e5629e2881600f350ecbe48f6d23d5;hpb=ad5d27899fdbe7a66e57fdf1af883dbd7ff88dac;p=linux-2.6-omap-h63xx.git

diff --git a/crypto/sha256_generic.c b/crypto/sha256_generic.c
index 74bf2f95f4e..5a8dd47558e 100644
--- a/crypto/sha256_generic.c
+++ b/crypto/sha256_generic.c
@@ -9,6 +9,7 @@
  * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
  * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
  * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
+ * SHA224 Support Copyright 2007 Intel Corporation <jonathan.lynch@intel.com>
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the Free
@@ -21,12 +22,9 @@
 #include <linux/mm.h>
 #include <linux/crypto.h>
 #include <linux/types.h>
-#include <asm/scatterlist.h>
+#include <crypto/sha.h>
 #include <asm/byteorder.h>
 
-#define SHA256_DIGEST_SIZE	32
-#define SHA256_HMAC_BLOCK_SIZE	64
-
 struct sha256_ctx {
 	u32 count[2];
 	u32 state[8];
@@ -48,15 +46,6 @@ static inline u32 Maj(u32 x, u32 y, u32 z)
 #define s0(x)       (ror32(x, 7) ^ ror32(x,18) ^ (x >> 3))
 #define s1(x)       (ror32(x,17) ^ ror32(x,19) ^ (x >> 10))
 
-#define H0         0x6a09e667
-#define H1         0xbb67ae85
-#define H2         0x3c6ef372
-#define H3         0xa54ff53a
-#define H4         0x510e527f
-#define H5         0x9b05688c
-#define H6         0x1f83d9ab
-#define H7         0x5be0cd19
-
 static inline void LOAD_OP(int I, u32 *W, const u8 *input)
 {
 	W[I] = __be32_to_cpu( ((__be32*)(input))[I] );
@@ -230,17 +219,33 @@ static void sha256_transform(u32 *state, const u8 *input)
 	memset(W, 0, 64 * sizeof(u32));
 }
 
+
+static void sha224_init(struct crypto_tfm *tfm)
+{
+	struct sha256_ctx *sctx = crypto_tfm_ctx(tfm);
+	sctx->state[0] = SHA224_H0;
+	sctx->state[1] = SHA224_H1;
+	sctx->state[2] = SHA224_H2;
+	sctx->state[3] = SHA224_H3;
+	sctx->state[4] = SHA224_H4;
+	sctx->state[5] = SHA224_H5;
+	sctx->state[6] = SHA224_H6;
+	sctx->state[7] = SHA224_H7;
+	sctx->count[0] = 0;
+	sctx->count[1] = 0;
+}
+
 static void sha256_init(struct crypto_tfm *tfm)
 {
 	struct sha256_ctx *sctx = crypto_tfm_ctx(tfm);
-	sctx->state[0] = H0;
-	sctx->state[1] = H1;
-	sctx->state[2] = H2;
-	sctx->state[3] = H3;
-	sctx->state[4] = H4;
-	sctx->state[5] = H5;
-	sctx->state[6] = H6;
-	sctx->state[7] = H7;
+	sctx->state[0] = SHA256_H0;
+	sctx->state[1] = SHA256_H1;
+	sctx->state[2] = SHA256_H2;
+	sctx->state[3] = SHA256_H3;
+	sctx->state[4] = SHA256_H4;
+	sctx->state[5] = SHA256_H5;
+	sctx->state[6] = SHA256_H6;
+	sctx->state[7] = SHA256_H7;
 	sctx->count[0] = sctx->count[1] = 0;
 }
 
@@ -306,37 +311,76 @@ static void sha256_final(struct crypto_tfm *tfm, u8 *out)
 	memset(sctx, 0, sizeof(*sctx));
 }
 
+static void sha224_final(struct crypto_tfm *tfm, u8 *hash)
+{
+	u8 D[SHA256_DIGEST_SIZE];
+
+	sha256_final(tfm, D);
 
-static struct crypto_alg alg = {
+	memcpy(hash, D, SHA224_DIGEST_SIZE);
+	memset(D, 0, SHA256_DIGEST_SIZE);
+}
+
+static struct crypto_alg sha256 = {
 	.cra_name	=	"sha256",
 	.cra_driver_name=	"sha256-generic",
 	.cra_flags	=	CRYPTO_ALG_TYPE_DIGEST,
-	.cra_blocksize	=	SHA256_HMAC_BLOCK_SIZE,
+	.cra_blocksize	=	SHA256_BLOCK_SIZE,
 	.cra_ctxsize	=	sizeof(struct sha256_ctx),
 	.cra_module	=	THIS_MODULE,
 	.cra_alignmask	=	3,
-	.cra_list       =       LIST_HEAD_INIT(alg.cra_list),
+	.cra_list	=	LIST_HEAD_INIT(sha256.cra_list),
 	.cra_u		=	{ .digest = {
 	.dia_digestsize	=	SHA256_DIGEST_SIZE,
-	.dia_init   	= 	sha256_init,
-	.dia_update 	=	sha256_update,
-	.dia_final  	=	sha256_final } }
+	.dia_init	=	sha256_init,
+	.dia_update	=	sha256_update,
+	.dia_final	=	sha256_final } }
 };
 
-static int __init init(void)
+static struct crypto_alg sha224 = {
+	.cra_name	= "sha224",
+	.cra_driver_name = "sha224-generic",
+	.cra_flags	= CRYPTO_ALG_TYPE_DIGEST,
+	.cra_blocksize	= SHA224_BLOCK_SIZE,
+	.cra_ctxsize	= sizeof(struct sha256_ctx),
+	.cra_module	= THIS_MODULE,
+	.cra_alignmask	= 3,
+	.cra_list	= LIST_HEAD_INIT(sha224.cra_list),
+	.cra_u		= { .digest = {
+	.dia_digestsize = SHA224_DIGEST_SIZE,
+	.dia_init	= sha224_init,
+	.dia_update	= sha256_update,
+	.dia_final	= sha224_final } }
+};
+
+static int __init sha256_generic_mod_init(void)
 {
-	return crypto_register_alg(&alg);
+	int ret = 0;
+
+	ret = crypto_register_alg(&sha224);
+
+	if (ret < 0)
+		return ret;
+
+	ret = crypto_register_alg(&sha256);
+
+	if (ret < 0)
+		crypto_unregister_alg(&sha224);
+
+	return ret;
 }
 
-static void __exit fini(void)
+static void __exit sha256_generic_mod_fini(void)
 {
-	crypto_unregister_alg(&alg);
+	crypto_unregister_alg(&sha224);
+	crypto_unregister_alg(&sha256);
 }
 
-module_init(init);
-module_exit(fini);
+module_init(sha256_generic_mod_init);
+module_exit(sha256_generic_mod_fini);
 
 MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("SHA256 Secure Hash Algorithm");
+MODULE_DESCRIPTION("SHA-224 and SHA-256 Secure Hash Algorithm");
 
+MODULE_ALIAS("sha224");
 MODULE_ALIAS("sha256");