[deliverable/linux.git] / crypto / sha512_generic.c

/* SHA-512 code by Jean-Luc Cooke <jlcooke@certainkey.com>
 *
 * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
 * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
 * Copyright (c) 2003 Kyle McMartin <kyle@debian.org>
 *
 * 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 Software Foundation; either version 2, or (at your option) any
 * later version.
 *
 */
#include <crypto/internal/hash.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/crypto.h>
#include <linux/types.h>
#include <crypto/sha.h>
#include <crypto/sha512_base.h>
#include <linux/percpu.h>
#include <asm/byteorder.h>
#include <asm/unaligned.h>

static inline u64 Ch(u64 x, u64 y, u64 z)
{
        return z ^ (x & (y ^ z));
}

static inline u64 Maj(u64 x, u64 y, u64 z)
{
        return (x & y) | (z & (x | y));
}

static const u64 sha512_K[80] = {
        0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL,
        0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
        0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL,
        0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
        0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL,
        0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
        0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL,
        0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
        0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL,
        0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
        0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL,
        0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
        0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL,
        0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
        0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL,
        0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
        0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL,
        0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
        0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL,
        0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
        0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL,
        0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
        0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL,
        0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
        0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL,
        0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
        0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL,
};

#define e0(x)       (ror64(x,28) ^ ror64(x,34) ^ ror64(x,39))
#define e1(x)       (ror64(x,14) ^ ror64(x,18) ^ ror64(x,41))
#define s0(x)       (ror64(x, 1) ^ ror64(x, 8) ^ (x >> 7))
#define s1(x)       (ror64(x,19) ^ ror64(x,61) ^ (x >> 6))

static inline void LOAD_OP(int I, u64 *W, const u8 *input)
{
	W[I] = get_unaligned_be64((__u64 *)input + I);
}

static inline void BLEND_OP(int I, u64 *W)
{
	W[I & 15] += s1(W[(I-2) & 15]) + W[(I-7) & 15] + s0(W[(I-15) & 15]);
}

static void
sha512_transform(u64 *state, const u8 *input)
{
	u64 a, b, c, d, e, f, g, h, t1, t2;

	int i;
	u64 W[16];

	/* load the state into our registers */
	a=state[0];   b=state[1];   c=state[2];   d=state[3];
	e=state[4];   f=state[5];   g=state[6];   h=state[7];

	/* now iterate */
	for (i=0; i<80; i+=8) {
		if (!(i & 8)) {
			int j;

			if (i < 16) {
				/* load the input */
				for (j = 0; j < 16; j++)
					LOAD_OP(i + j, W, input);
			} else {
				for (j = 0; j < 16; j++) {
					BLEND_OP(i + j, W);
				}
			}
		}

		t1 = h + e1(e) + Ch(e,f,g) + sha512_K[i  ] + W[(i & 15)];
		t2 = e0(a) + Maj(a,b,c);    d+=t1;    h=t1+t2;
		t1 = g + e1(d) + Ch(d,e,f) + sha512_K[i+1] + W[(i & 15) + 1];
		t2 = e0(h) + Maj(h,a,b);    c+=t1;    g=t1+t2;
		t1 = f + e1(c) + Ch(c,d,e) + sha512_K[i+2] + W[(i & 15) + 2];
		t2 = e0(g) + Maj(g,h,a);    b+=t1;    f=t1+t2;
		t1 = e + e1(b) + Ch(b,c,d) + sha512_K[i+3] + W[(i & 15) + 3];
		t2 = e0(f) + Maj(f,g,h);    a+=t1;    e=t1+t2;
		t1 = d + e1(a) + Ch(a,b,c) + sha512_K[i+4] + W[(i & 15) + 4];
		t2 = e0(e) + Maj(e,f,g);    h+=t1;    d=t1+t2;
		t1 = c + e1(h) + Ch(h,a,b) + sha512_K[i+5] + W[(i & 15) + 5];
		t2 = e0(d) + Maj(d,e,f);    g+=t1;    c=t1+t2;
		t1 = b + e1(g) + Ch(g,h,a) + sha512_K[i+6] + W[(i & 15) + 6];
		t2 = e0(c) + Maj(c,d,e);    f+=t1;    b=t1+t2;
		t1 = a + e1(f) + Ch(f,g,h) + sha512_K[i+7] + W[(i & 15) + 7];
		t2 = e0(b) + Maj(b,c,d);    e+=t1;    a=t1+t2;
	}

	state[0] += a; state[1] += b; state[2] += c; state[3] += d;
	state[4] += e; state[5] += f; state[6] += g; state[7] += h;

	/* erase our data */
	a = b = c = d = e = f = g = h = t1 = t2 = 0;
}

static void sha512_generic_block_fn(struct sha512_state *sst, u8 const *src,
				    int blocks)
{
	while (blocks--) {
		sha512_transform(sst->state, src);
		src += SHA512_BLOCK_SIZE;
	}
}

int crypto_sha512_update(struct shash_desc *desc, const u8 *data,
			unsigned int len)
{
	return sha512_base_do_update(desc, data, len, sha512_generic_block_fn);
}
EXPORT_SYMBOL(crypto_sha512_update);

static int sha512_final(struct shash_desc *desc, u8 *hash)
{
	sha512_base_do_finalize(desc, sha512_generic_block_fn);
	return sha512_base_finish(desc, hash);
}

int crypto_sha512_finup(struct shash_desc *desc, const u8 *data,
			unsigned int len, u8 *hash)
{
	sha512_base_do_update(desc, data, len, sha512_generic_block_fn);
	return sha512_final(desc, hash);
}
EXPORT_SYMBOL(crypto_sha512_finup);

static struct shash_alg sha512_algs[2] = { {
	.digestsize	=	SHA512_DIGEST_SIZE,
	.init		=	sha512_base_init,
	.update		=	crypto_sha512_update,
	.final		=	sha512_final,
	.finup		=	crypto_sha512_finup,
	.descsize	=	sizeof(struct sha512_state),
	.base		=	{
		.cra_name	=	"sha512",
		.cra_driver_name =	"sha512-generic",
		.cra_flags	=	CRYPTO_ALG_TYPE_SHASH,
		.cra_blocksize	=	SHA512_BLOCK_SIZE,
		.cra_module	=	THIS_MODULE,
	}
}, {
	.digestsize	=	SHA384_DIGEST_SIZE,
	.init		=	sha384_base_init,
	.update		=	crypto_sha512_update,
	.final		=	sha512_final,
	.finup		=	crypto_sha512_finup,
	.descsize	=	sizeof(struct sha512_state),
	.base		=	{
		.cra_name	=	"sha384",
		.cra_driver_name =	"sha384-generic",
		.cra_flags	=	CRYPTO_ALG_TYPE_SHASH,
		.cra_blocksize	=	SHA384_BLOCK_SIZE,
		.cra_module	=	THIS_MODULE,
	}
} };

static int __init sha512_generic_mod_init(void)
{
	return crypto_register_shashes(sha512_algs, ARRAY_SIZE(sha512_algs));
}

static void __exit sha512_generic_mod_fini(void)
{
	crypto_unregister_shashes(sha512_algs, ARRAY_SIZE(sha512_algs));
}

module_init(sha512_generic_mod_init);
module_exit(sha512_generic_mod_fini);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SHA-512 and SHA-384 Secure Hash Algorithms");

MODULE_ALIAS_CRYPTO("sha384");
MODULE_ALIAS_CRYPTO("sha384-generic");
MODULE_ALIAS_CRYPTO("sha512");
MODULE_ALIAS_CRYPTO("sha512-generic");
Commit	Line	Data
1da177e4 LT	1	/* SHA-512 code by Jean-Luc Cooke <jlcooke@certainkey.com>
	2	*
	3	* Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
	4	* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
	5	* Copyright (c) 2003 Kyle McMartin <kyle@debian.org>
	6	*
	7	* This program is free software; you can redistribute it and/or modify it
	8	* under the terms of the GNU General Public License as published by the
	9	* Free Software Foundation; either version 2, or (at your option) any
	10	* later version.
	11	*
	12	*/
bd9d20db	13	#include <crypto/internal/hash.h>
1da177e4 LT	14	#include <linux/kernel.h>
1da177e4 LT	15	#include <linux/module.h>
1da177e4 LT	16	#include <linux/mm.h>
	17	#include <linux/init.h>
	18	#include <linux/crypto.h>
06ace7a9	19	#include <linux/types.h>
5265eeb2	20	#include <crypto/sha.h>
ca142584	21	#include <crypto/sha512_base.h>
f9e2bca6	22	#include <linux/percpu.h>
1da177e4	23	#include <asm/byteorder.h>
be34c4ef	24	#include <asm/unaligned.h>
1da177e4	25
1da177e4 LT	26	static inline u64 Ch(u64 x, u64 y, u64 z)
	27	{
	28	return z ^ (x & (y ^ z));
	29	}
	30
	31	static inline u64 Maj(u64 x, u64 y, u64 z)
	32	{
	33	return (x & y) \| (z & (x \| y));
	34	}
	35
1da177e4 LT	36	static const u64 sha512_K[80] = {
	37	0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL,
	38	0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
	39	0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL,
	40	0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
	41	0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL,
	42	0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
	43	0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL,
	44	0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
	45	0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL,
	46	0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
	47	0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL,
	48	0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
	49	0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL,
	50	0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
	51	0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL,
	52	0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
	53	0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL,
	54	0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
	55	0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL,
	56	0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
	57	0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL,
	58	0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
	59	0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL,
	60	0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
	61	0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL,
	62	0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
	63	0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL,
	64	};
	65
f2ea0f5f AD	66	#define e0(x) (ror64(x,28) ^ ror64(x,34) ^ ror64(x,39))
	67	#define e1(x) (ror64(x,14) ^ ror64(x,18) ^ ror64(x,41))
	68	#define s0(x) (ror64(x, 1) ^ ror64(x, 8) ^ (x >> 7))
	69	#define s1(x) (ror64(x,19) ^ ror64(x,61) ^ (x >> 6))
1da177e4	70
1da177e4 LT	71	static inline void LOAD_OP(int I, u64 W, const u8 input)
1da177e4 LT	72	{
be34c4ef	73	W[I] = get_unaligned_be64((__u64 *)input + I);
1da177e4 LT	74	}
	75
	76	static inline void BLEND_OP(int I, u64 *W)
	77	{
58d7d18b	78	W[I & 15] += s1(W[(I-2) & 15]) + W[(I-7) & 15] + s0(W[(I-15) & 15]);
1da177e4 LT	79	}
	80
	81	static void
f9e2bca6	82	sha512_transform(u64 state, const u8 input)
1da177e4 LT	83	{
	84	u64 a, b, c, d, e, f, g, h, t1, t2;
	85
	86	int i;
51fc6dc8	87	u64 W[16];
1da177e4	88
1da177e4	89	/* load the state into our registers */
78f8b3a2 JG	90	a=state[0]; b=state[1]; c=state[2]; d=state[3];
	91	e=state[4]; f=state[5]; g=state[6]; h=state[7];
	92
3a92d687 HX	93	/* now iterate */
	94	for (i=0; i<80; i+=8) {
	95	if (!(i & 8)) {
	96	int j;
	97
	98	if (i < 16) {
	99	/* load the input */
	100	for (j = 0; j < 16; j++)
	101	LOAD_OP(i + j, W, input);
	102	} else {
	103	for (j = 0; j < 16; j++) {
	104	BLEND_OP(i + j, W);
	105	}
	106	}
	107	}
	108
	109	t1 = h + e1(e) + Ch(e,f,g) + sha512_K[i ] + W[(i & 15)];
	110	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
	111	t1 = g + e1(d) + Ch(d,e,f) + sha512_K[i+1] + W[(i & 15) + 1];
	112	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
	113	t1 = f + e1(c) + Ch(c,d,e) + sha512_K[i+2] + W[(i & 15) + 2];
	114	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
	115	t1 = e + e1(b) + Ch(b,c,d) + sha512_K[i+3] + W[(i & 15) + 3];
	116	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
	117	t1 = d + e1(a) + Ch(a,b,c) + sha512_K[i+4] + W[(i & 15) + 4];
	118	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
	119	t1 = c + e1(h) + Ch(h,a,b) + sha512_K[i+5] + W[(i & 15) + 5];
	120	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
	121	t1 = b + e1(g) + Ch(g,h,a) + sha512_K[i+6] + W[(i & 15) + 6];
	122	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
	123	t1 = a + e1(f) + Ch(f,g,h) + sha512_K[i+7] + W[(i & 15) + 7];
	124	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
1da177e4	125	}
78f8b3a2 JG	126
	127	state[0] += a; state[1] += b; state[2] += c; state[3] += d;
	128	state[4] += e; state[5] += f; state[6] += g; state[7] += h;
1da177e4 LT	129
	130	/* erase our data */
	131	a = b = c = d = e = f = g = h = t1 = t2 = 0;
	132	}
	133
ca142584 AB	134	static void sha512_generic_block_fn(struct sha512_state sst, u8 const src,
ca142584 AB	135	int blocks)
1da177e4	136	{
ca142584 AB	137	while (blocks--) {
	138	sha512_transform(sst->state, src);
	139	src += SHA512_BLOCK_SIZE;
	140	}
1da177e4 LT	141	}
1da177e4 LT	142
bf70fa9d TC	143	int crypto_sha512_update(struct shash_desc desc, const u8 data,
bf70fa9d TC	144	unsigned int len)
1da177e4	145	{
ca142584	146	return sha512_base_do_update(desc, data, len, sha512_generic_block_fn);
1da177e4	147	}
bf70fa9d	148	EXPORT_SYMBOL(crypto_sha512_update);
1da177e4	149
ca142584	150	static int sha512_final(struct shash_desc desc, u8 hash)
1da177e4	151	{
ca142584 AB	152	sha512_base_do_finalize(desc, sha512_generic_block_fn);
ca142584 AB	153	return sha512_base_finish(desc, hash);
1da177e4 LT	154	}
1da177e4 LT	155
ca142584 AB	156	int crypto_sha512_finup(struct shash_desc desc, const u8 data,
ca142584 AB	157	unsigned int len, u8 *hash)
1da177e4	158	{
ca142584 AB	159	sha512_base_do_update(desc, data, len, sha512_generic_block_fn);
ca142584 AB	160	return sha512_final(desc, hash);
1da177e4	161	}
ca142584	162	EXPORT_SYMBOL(crypto_sha512_finup);
1da177e4	163
648b2a10	164	static struct shash_alg sha512_algs[2] = { {
bd9d20db	165	.digestsize = SHA512_DIGEST_SIZE,
ca142584	166	.init = sha512_base_init,
bf70fa9d	167	.update = crypto_sha512_update,
bd9d20db	168	.final = sha512_final,
ca142584	169	.finup = crypto_sha512_finup,
1f38ad83	170	.descsize = sizeof(struct sha512_state),
bd9d20db AKR	171	.base = {
bd9d20db AKR	172	.cra_name = "sha512",
d3295814	173	.cra_driver_name = "sha512-generic",
bd9d20db AKR	174	.cra_flags = CRYPTO_ALG_TYPE_SHASH,
	175	.cra_blocksize = SHA512_BLOCK_SIZE,
	176	.cra_module = THIS_MODULE,
	177	}
648b2a10	178	}, {
bd9d20db	179	.digestsize = SHA384_DIGEST_SIZE,
ca142584	180	.init = sha384_base_init,
bf70fa9d	181	.update = crypto_sha512_update,
ca142584 AB	182	.final = sha512_final,
ca142584 AB	183	.finup = crypto_sha512_finup,
1f38ad83	184	.descsize = sizeof(struct sha512_state),
bd9d20db AKR	185	.base = {
bd9d20db AKR	186	.cra_name = "sha384",
d3295814	187	.cra_driver_name = "sha384-generic",
bd9d20db AKR	188	.cra_flags = CRYPTO_ALG_TYPE_SHASH,
	189	.cra_blocksize = SHA384_BLOCK_SIZE,
	190	.cra_module = THIS_MODULE,
	191	}
648b2a10	192	} };
1da177e4	193
3af5b90b	194	static int __init sha512_generic_mod_init(void)
1da177e4	195	{
648b2a10	196	return crypto_register_shashes(sha512_algs, ARRAY_SIZE(sha512_algs));
1da177e4 LT	197	}
1da177e4 LT	198
3af5b90b	199	static void __exit sha512_generic_mod_fini(void)
1da177e4	200	{
648b2a10	201	crypto_unregister_shashes(sha512_algs, ARRAY_SIZE(sha512_algs));
1da177e4 LT	202	}
1da177e4 LT	203
3af5b90b KB	204	module_init(sha512_generic_mod_init);
3af5b90b KB	205	module_exit(sha512_generic_mod_fini);
1da177e4 LT	206
	207	MODULE_LICENSE("GPL");
	208	MODULE_DESCRIPTION("SHA-512 and SHA-384 Secure Hash Algorithms");
78f8b3a2	209
5d26a105	210	MODULE_ALIAS_CRYPTO("sha384");
3e14dcf7	211	MODULE_ALIAS_CRYPTO("sha384-generic");
5d26a105	212	MODULE_ALIAS_CRYPTO("sha512");
3e14dcf7	213	MODULE_ALIAS_CRYPTO("sha512-generic");