* 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
#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];
#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] );
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;
}
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");