[linux.git] / crypto / sha256_generic.c

/*
 * Cryptographic API.
 *
 * SHA-256, as specified in
 * http://csrc.nist.gov/groups/STM/cavp/documents/shs/sha256-384-512.pdf
 *
 * SHA-256 code by Jean-Luc Cooke <[email protected]>.
 *
 * Copyright (c) Jean-Luc Cooke <[email protected]>
 * Copyright (c) Andrew McDonald <[email protected]>
 * Copyright (c) 2002 James Morris <[email protected]>
 * SHA224 Support Copyright 2007 Intel Corporation <[email protected]>
 *
 * 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 of the License, or (at your option) 
 * any later version.
 *
 */
#include <crypto/internal/hash.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/types.h>
#include <crypto/sha.h>
#include <crypto/sha256_base.h>
#include <asm/byteorder.h>
#include <asm/unaligned.h>

static inline u32 Ch(u32 x, u32 y, u32 z)
{
	return z ^ (x & (y ^ z));
}

static inline u32 Maj(u32 x, u32 y, u32 z)
{
	return (x & y) | (z & (x | y));
}

#define e0(x)       (ror32(x, 2) ^ ror32(x,13) ^ ror32(x,22))
#define e1(x)       (ror32(x, 6) ^ ror32(x,11) ^ ror32(x,25))
#define s0(x)       (ror32(x, 7) ^ ror32(x,18) ^ (x >> 3))
#define s1(x)       (ror32(x,17) ^ ror32(x,19) ^ (x >> 10))

static inline void LOAD_OP(int I, u32 *W, const u8 *input)
{
	W[I] = get_unaligned_be32((__u32 *)input + I);
}

static inline void BLEND_OP(int I, u32 *W)
{
	W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16];
}

static void sha256_transform(u32 *state, const u8 *input)
{
	u32 a, b, c, d, e, f, g, h, t1, t2;
	u32 W[64];
	int i;

	/* load the input */
	for (i = 0; i < 16; i++)
		LOAD_OP(i, W, input);

	/* now blend */
	for (i = 16; i < 64; i++)
		BLEND_OP(i, W);

	/* 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 */
	t1 = h + e1(e) + Ch(e,f,g) + 0x428a2f98 + W[ 0];
	t2 = e0(a) + Maj(a,b,c);    d+=t1;    h=t1+t2;
	t1 = g + e1(d) + Ch(d,e,f) + 0x71374491 + W[ 1];
	t2 = e0(h) + Maj(h,a,b);    c+=t1;    g=t1+t2;
	t1 = f + e1(c) + Ch(c,d,e) + 0xb5c0fbcf + W[ 2];
	t2 = e0(g) + Maj(g,h,a);    b+=t1;    f=t1+t2;
	t1 = e + e1(b) + Ch(b,c,d) + 0xe9b5dba5 + W[ 3];
	t2 = e0(f) + Maj(f,g,h);    a+=t1;    e=t1+t2;
	t1 = d + e1(a) + Ch(a,b,c) + 0x3956c25b + W[ 4];
	t2 = e0(e) + Maj(e,f,g);    h+=t1;    d=t1+t2;
	t1 = c + e1(h) + Ch(h,a,b) + 0x59f111f1 + W[ 5];
	t2 = e0(d) + Maj(d,e,f);    g+=t1;    c=t1+t2;
	t1 = b + e1(g) + Ch(g,h,a) + 0x923f82a4 + W[ 6];
	t2 = e0(c) + Maj(c,d,e);    f+=t1;    b=t1+t2;
	t1 = a + e1(f) + Ch(f,g,h) + 0xab1c5ed5 + W[ 7];
	t2 = e0(b) + Maj(b,c,d);    e+=t1;    a=t1+t2;

	t1 = h + e1(e) + Ch(e,f,g) + 0xd807aa98 + W[ 8];
	t2 = e0(a) + Maj(a,b,c);    d+=t1;    h=t1+t2;
	t1 = g + e1(d) + Ch(d,e,f) + 0x12835b01 + W[ 9];
	t2 = e0(h) + Maj(h,a,b);    c+=t1;    g=t1+t2;
	t1 = f + e1(c) + Ch(c,d,e) + 0x243185be + W[10];
	t2 = e0(g) + Maj(g,h,a);    b+=t1;    f=t1+t2;
	t1 = e + e1(b) + Ch(b,c,d) + 0x550c7dc3 + W[11];
	t2 = e0(f) + Maj(f,g,h);    a+=t1;    e=t1+t2;
	t1 = d + e1(a) + Ch(a,b,c) + 0x72be5d74 + W[12];
	t2 = e0(e) + Maj(e,f,g);    h+=t1;    d=t1+t2;
	t1 = c + e1(h) + Ch(h,a,b) + 0x80deb1fe + W[13];
	t2 = e0(d) + Maj(d,e,f);    g+=t1;    c=t1+t2;
	t1 = b + e1(g) + Ch(g,h,a) + 0x9bdc06a7 + W[14];
	t2 = e0(c) + Maj(c,d,e);    f+=t1;    b=t1+t2;
	t1 = a + e1(f) + Ch(f,g,h) + 0xc19bf174 + W[15];
	t2 = e0(b) + Maj(b,c,d);    e+=t1;    a=t1+t2;

	t1 = h + e1(e) + Ch(e,f,g) + 0xe49b69c1 + W[16];
	t2 = e0(a) + Maj(a,b,c);    d+=t1;    h=t1+t2;
	t1 = g + e1(d) + Ch(d,e,f) + 0xefbe4786 + W[17];
	t2 = e0(h) + Maj(h,a,b);    c+=t1;    g=t1+t2;
	t1 = f + e1(c) + Ch(c,d,e) + 0x0fc19dc6 + W[18];
	t2 = e0(g) + Maj(g,h,a);    b+=t1;    f=t1+t2;
	t1 = e + e1(b) + Ch(b,c,d) + 0x240ca1cc + W[19];
	t2 = e0(f) + Maj(f,g,h);    a+=t1;    e=t1+t2;
	t1 = d + e1(a) + Ch(a,b,c) + 0x2de92c6f + W[20];
	t2 = e0(e) + Maj(e,f,g);    h+=t1;    d=t1+t2;
	t1 = c + e1(h) + Ch(h,a,b) + 0x4a7484aa + W[21];
	t2 = e0(d) + Maj(d,e,f);    g+=t1;    c=t1+t2;
	t1 = b + e1(g) + Ch(g,h,a) + 0x5cb0a9dc + W[22];
	t2 = e0(c) + Maj(c,d,e);    f+=t1;    b=t1+t2;
	t1 = a + e1(f) + Ch(f,g,h) + 0x76f988da + W[23];
	t2 = e0(b) + Maj(b,c,d);    e+=t1;    a=t1+t2;

	t1 = h + e1(e) + Ch(e,f,g) + 0x983e5152 + W[24];
	t2 = e0(a) + Maj(a,b,c);    d+=t1;    h=t1+t2;
	t1 = g + e1(d) + Ch(d,e,f) + 0xa831c66d + W[25];
	t2 = e0(h) + Maj(h,a,b);    c+=t1;    g=t1+t2;
	t1 = f + e1(c) + Ch(c,d,e) + 0xb00327c8 + W[26];
	t2 = e0(g) + Maj(g,h,a);    b+=t1;    f=t1+t2;
	t1 = e + e1(b) + Ch(b,c,d) + 0xbf597fc7 + W[27];
	t2 = e0(f) + Maj(f,g,h);    a+=t1;    e=t1+t2;
	t1 = d + e1(a) + Ch(a,b,c) + 0xc6e00bf3 + W[28];
	t2 = e0(e) + Maj(e,f,g);    h+=t1;    d=t1+t2;
	t1 = c + e1(h) + Ch(h,a,b) + 0xd5a79147 + W[29];
	t2 = e0(d) + Maj(d,e,f);    g+=t1;    c=t1+t2;
	t1 = b + e1(g) + Ch(g,h,a) + 0x06ca6351 + W[30];
	t2 = e0(c) + Maj(c,d,e);    f+=t1;    b=t1+t2;
	t1 = a + e1(f) + Ch(f,g,h) + 0x14292967 + W[31];
	t2 = e0(b) + Maj(b,c,d);    e+=t1;    a=t1+t2;

	t1 = h + e1(e) + Ch(e,f,g) + 0x27b70a85 + W[32];
	t2 = e0(a) + Maj(a,b,c);    d+=t1;    h=t1+t2;
	t1 = g + e1(d) + Ch(d,e,f) + 0x2e1b2138 + W[33];
	t2 = e0(h) + Maj(h,a,b);    c+=t1;    g=t1+t2;
	t1 = f + e1(c) + Ch(c,d,e) + 0x4d2c6dfc + W[34];
	t2 = e0(g) + Maj(g,h,a);    b+=t1;    f=t1+t2;
	t1 = e + e1(b) + Ch(b,c,d) + 0x53380d13 + W[35];
	t2 = e0(f) + Maj(f,g,h);    a+=t1;    e=t1+t2;
	t1 = d + e1(a) + Ch(a,b,c) + 0x650a7354 + W[36];
	t2 = e0(e) + Maj(e,f,g);    h+=t1;    d=t1+t2;
	t1 = c + e1(h) + Ch(h,a,b) + 0x766a0abb + W[37];
	t2 = e0(d) + Maj(d,e,f);    g+=t1;    c=t1+t2;
	t1 = b + e1(g) + Ch(g,h,a) + 0x81c2c92e + W[38];
	t2 = e0(c) + Maj(c,d,e);    f+=t1;    b=t1+t2;
	t1 = a + e1(f) + Ch(f,g,h) + 0x92722c85 + W[39];
	t2 = e0(b) + Maj(b,c,d);    e+=t1;    a=t1+t2;

	t1 = h + e1(e) + Ch(e,f,g) + 0xa2bfe8a1 + W[40];
	t2 = e0(a) + Maj(a,b,c);    d+=t1;    h=t1+t2;
	t1 = g + e1(d) + Ch(d,e,f) + 0xa81a664b + W[41];
	t2 = e0(h) + Maj(h,a,b);    c+=t1;    g=t1+t2;
	t1 = f + e1(c) + Ch(c,d,e) + 0xc24b8b70 + W[42];
	t2 = e0(g) + Maj(g,h,a);    b+=t1;    f=t1+t2;
	t1 = e + e1(b) + Ch(b,c,d) + 0xc76c51a3 + W[43];
	t2 = e0(f) + Maj(f,g,h);    a+=t1;    e=t1+t2;
	t1 = d + e1(a) + Ch(a,b,c) + 0xd192e819 + W[44];
	t2 = e0(e) + Maj(e,f,g);    h+=t1;    d=t1+t2;
	t1 = c + e1(h) + Ch(h,a,b) + 0xd6990624 + W[45];
	t2 = e0(d) + Maj(d,e,f);    g+=t1;    c=t1+t2;
	t1 = b + e1(g) + Ch(g,h,a) + 0xf40e3585 + W[46];
	t2 = e0(c) + Maj(c,d,e);    f+=t1;    b=t1+t2;
	t1 = a + e1(f) + Ch(f,g,h) + 0x106aa070 + W[47];
	t2 = e0(b) + Maj(b,c,d);    e+=t1;    a=t1+t2;

	t1 = h + e1(e) + Ch(e,f,g) + 0x19a4c116 + W[48];
	t2 = e0(a) + Maj(a,b,c);    d+=t1;    h=t1+t2;
	t1 = g + e1(d) + Ch(d,e,f) + 0x1e376c08 + W[49];
	t2 = e0(h) + Maj(h,a,b);    c+=t1;    g=t1+t2;
	t1 = f + e1(c) + Ch(c,d,e) + 0x2748774c + W[50];
	t2 = e0(g) + Maj(g,h,a);    b+=t1;    f=t1+t2;
	t1 = e + e1(b) + Ch(b,c,d) + 0x34b0bcb5 + W[51];
	t2 = e0(f) + Maj(f,g,h);    a+=t1;    e=t1+t2;
	t1 = d + e1(a) + Ch(a,b,c) + 0x391c0cb3 + W[52];
	t2 = e0(e) + Maj(e,f,g);    h+=t1;    d=t1+t2;
	t1 = c + e1(h) + Ch(h,a,b) + 0x4ed8aa4a + W[53];
	t2 = e0(d) + Maj(d,e,f);    g+=t1;    c=t1+t2;
	t1 = b + e1(g) + Ch(g,h,a) + 0x5b9cca4f + W[54];
	t2 = e0(c) + Maj(c,d,e);    f+=t1;    b=t1+t2;
	t1 = a + e1(f) + Ch(f,g,h) + 0x682e6ff3 + W[55];
	t2 = e0(b) + Maj(b,c,d);    e+=t1;    a=t1+t2;

	t1 = h + e1(e) + Ch(e,f,g) + 0x748f82ee + W[56];
	t2 = e0(a) + Maj(a,b,c);    d+=t1;    h=t1+t2;
	t1 = g + e1(d) + Ch(d,e,f) + 0x78a5636f + W[57];
	t2 = e0(h) + Maj(h,a,b);    c+=t1;    g=t1+t2;
	t1 = f + e1(c) + Ch(c,d,e) + 0x84c87814 + W[58];
	t2 = e0(g) + Maj(g,h,a);    b+=t1;    f=t1+t2;
	t1 = e + e1(b) + Ch(b,c,d) + 0x8cc70208 + W[59];
	t2 = e0(f) + Maj(f,g,h);    a+=t1;    e=t1+t2;
	t1 = d + e1(a) + Ch(a,b,c) + 0x90befffa + W[60];
	t2 = e0(e) + Maj(e,f,g);    h+=t1;    d=t1+t2;
	t1 = c + e1(h) + Ch(h,a,b) + 0xa4506ceb + W[61];
	t2 = e0(d) + Maj(d,e,f);    g+=t1;    c=t1+t2;
	t1 = b + e1(g) + Ch(g,h,a) + 0xbef9a3f7 + W[62];
	t2 = e0(c) + Maj(c,d,e);    f+=t1;    b=t1+t2;
	t1 = a + e1(f) + Ch(f,g,h) + 0xc67178f2 + W[63];
	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;

	/* clear any sensitive info... */
	a = b = c = d = e = f = g = h = t1 = t2 = 0;
	memzero_explicit(W, 64 * sizeof(u32));
}

static void sha256_generic_block_fn(struct sha256_state *sst, u8 const *src,
				    int blocks)
{
	while (blocks--) {
		sha256_transform(sst->state, src);
		src += SHA256_BLOCK_SIZE;
	}
}

int crypto_sha256_update(struct shash_desc *desc, const u8 *data,
			  unsigned int len)
{
	return sha256_base_do_update(desc, data, len, sha256_generic_block_fn);
}
EXPORT_SYMBOL(crypto_sha256_update);

static int sha256_final(struct shash_desc *desc, u8 *out)
{
	sha256_base_do_finalize(desc, sha256_generic_block_fn);
	return sha256_base_finish(desc, out);
}

int crypto_sha256_finup(struct shash_desc *desc, const u8 *data,
			unsigned int len, u8 *hash)
{
	sha256_base_do_update(desc, data, len, sha256_generic_block_fn);
	return sha256_final(desc, hash);
}
EXPORT_SYMBOL(crypto_sha256_finup);

static struct shash_alg sha256_algs[2] = { {
	.digestsize	=	SHA256_DIGEST_SIZE,
	.init		=	sha256_base_init,
	.update		=	crypto_sha256_update,
	.final		=	sha256_final,
	.finup		=	crypto_sha256_finup,
	.descsize	=	sizeof(struct sha256_state),
	.base		=	{
		.cra_name	=	"sha256",
		.cra_driver_name=	"sha256-generic",
		.cra_flags	=	CRYPTO_ALG_TYPE_SHASH,
		.cra_blocksize	=	SHA256_BLOCK_SIZE,
		.cra_module	=	THIS_MODULE,
	}
}, {
	.digestsize	=	SHA224_DIGEST_SIZE,
	.init		=	sha224_base_init,
	.update		=	crypto_sha256_update,
	.final		=	sha256_final,
	.finup		=	crypto_sha256_finup,
	.descsize	=	sizeof(struct sha256_state),
	.base		=	{
		.cra_name	=	"sha224",
		.cra_driver_name=	"sha224-generic",
		.cra_flags	=	CRYPTO_ALG_TYPE_SHASH,
		.cra_blocksize	=	SHA224_BLOCK_SIZE,
		.cra_module	=	THIS_MODULE,
	}
} };

static int __init sha256_generic_mod_init(void)
{
	return crypto_register_shashes(sha256_algs, ARRAY_SIZE(sha256_algs));
}

static void __exit sha256_generic_mod_fini(void)
{
	crypto_unregister_shashes(sha256_algs, ARRAY_SIZE(sha256_algs));
}

module_init(sha256_generic_mod_init);
module_exit(sha256_generic_mod_fini);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SHA-224 and SHA-256 Secure Hash Algorithm");

MODULE_ALIAS_CRYPTO("sha224");
MODULE_ALIAS_CRYPTO("sha224-generic");
MODULE_ALIAS_CRYPTO("sha256");
MODULE_ALIAS_CRYPTO("sha256-generic");
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Cryptographic API.
	3	*
	4	* SHA-256, as specified in
8c882f64	5	* http://csrc.nist.gov/groups/STM/cavp/documents/shs/sha256-384-512.pdf
1da177e4 LT	6	*
	7	* SHA-256 code by Jean-Luc Cooke <[email protected]>.
	8	*
	9	* Copyright (c) Jean-Luc Cooke <[email protected]>
	10	* Copyright (c) Andrew McDonald <[email protected]>
	11	* Copyright (c) 2002 James Morris <[email protected]>
cd12fb90	12	* SHA224 Support Copyright 2007 Intel Corporation <[email protected]>
1da177e4 LT	13	*
	14	* This program is free software; you can redistribute it and/or modify it
	15	* under the terms of the GNU General Public License as published by the Free
	16	* Software Foundation; either version 2 of the License, or (at your option)
	17	* any later version.
	18	*
	19	*/
50e109b5	20	#include <crypto/internal/hash.h>
1da177e4 LT	21	#include <linux/init.h>
	22	#include <linux/module.h>
	23	#include <linux/mm.h>
06ace7a9	24	#include <linux/types.h>
5265eeb2	25	#include <crypto/sha.h>
a2e5ba4f	26	#include <crypto/sha256_base.h>
1da177e4	27	#include <asm/byteorder.h>
be34c4ef	28	#include <asm/unaligned.h>
1da177e4	29
1da177e4 LT	30	static inline u32 Ch(u32 x, u32 y, u32 z)
	31	{
	32	return z ^ (x & (y ^ z));
	33	}
	34
	35	static inline u32 Maj(u32 x, u32 y, u32 z)
	36	{
	37	return (x & y) \| (z & (x \| y));
	38	}
	39
	40	#define e0(x) (ror32(x, 2) ^ ror32(x,13) ^ ror32(x,22))
	41	#define e1(x) (ror32(x, 6) ^ ror32(x,11) ^ ror32(x,25))
	42	#define s0(x) (ror32(x, 7) ^ ror32(x,18) ^ (x >> 3))
	43	#define s1(x) (ror32(x,17) ^ ror32(x,19) ^ (x >> 10))
	44
1da177e4 LT	45	static inline void LOAD_OP(int I, u32 W, const u8 input)
1da177e4 LT	46	{
be34c4ef	47	W[I] = get_unaligned_be32((__u32 *)input + I);
1da177e4 LT	48	}
	49
	50	static inline void BLEND_OP(int I, u32 *W)
	51	{
	52	W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16];
	53	}
	54
	55	static void sha256_transform(u32 state, const u8 input)
	56	{
	57	u32 a, b, c, d, e, f, g, h, t1, t2;
	58	u32 W[64];
	59	int i;
	60
	61	/* load the input */
	62	for (i = 0; i < 16; i++)
	63	LOAD_OP(i, W, input);
	64
	65	/* now blend */
	66	for (i = 16; i < 64; i++)
	67	BLEND_OP(i, W);
50e109b5	68
1da177e4 LT	69	/* load the state into our registers */
	70	a=state[0]; b=state[1]; c=state[2]; d=state[3];
	71	e=state[4]; f=state[5]; g=state[6]; h=state[7];
	72
	73	/* now iterate */
	74	t1 = h + e1(e) + Ch(e,f,g) + 0x428a2f98 + W[ 0];
	75	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
	76	t1 = g + e1(d) + Ch(d,e,f) + 0x71374491 + W[ 1];
	77	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
	78	t1 = f + e1(c) + Ch(c,d,e) + 0xb5c0fbcf + W[ 2];
	79	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
	80	t1 = e + e1(b) + Ch(b,c,d) + 0xe9b5dba5 + W[ 3];
	81	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
	82	t1 = d + e1(a) + Ch(a,b,c) + 0x3956c25b + W[ 4];
	83	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
	84	t1 = c + e1(h) + Ch(h,a,b) + 0x59f111f1 + W[ 5];
	85	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
	86	t1 = b + e1(g) + Ch(g,h,a) + 0x923f82a4 + W[ 6];
	87	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
	88	t1 = a + e1(f) + Ch(f,g,h) + 0xab1c5ed5 + W[ 7];
	89	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
	90
	91	t1 = h + e1(e) + Ch(e,f,g) + 0xd807aa98 + W[ 8];
	92	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
	93	t1 = g + e1(d) + Ch(d,e,f) + 0x12835b01 + W[ 9];
	94	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
	95	t1 = f + e1(c) + Ch(c,d,e) + 0x243185be + W[10];
	96	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
	97	t1 = e + e1(b) + Ch(b,c,d) + 0x550c7dc3 + W[11];
	98	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
	99	t1 = d + e1(a) + Ch(a,b,c) + 0x72be5d74 + W[12];
	100	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
	101	t1 = c + e1(h) + Ch(h,a,b) + 0x80deb1fe + W[13];
	102	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
	103	t1 = b + e1(g) + Ch(g,h,a) + 0x9bdc06a7 + W[14];
	104	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
	105	t1 = a + e1(f) + Ch(f,g,h) + 0xc19bf174 + W[15];
	106	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
	107
	108	t1 = h + e1(e) + Ch(e,f,g) + 0xe49b69c1 + W[16];
	109	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
	110	t1 = g + e1(d) + Ch(d,e,f) + 0xefbe4786 + W[17];
	111	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
	112	t1 = f + e1(c) + Ch(c,d,e) + 0x0fc19dc6 + W[18];
	113	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
	114	t1 = e + e1(b) + Ch(b,c,d) + 0x240ca1cc + W[19];
	115	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
	116	t1 = d + e1(a) + Ch(a,b,c) + 0x2de92c6f + W[20];
	117	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
	118	t1 = c + e1(h) + Ch(h,a,b) + 0x4a7484aa + W[21];
	119	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
	120	t1 = b + e1(g) + Ch(g,h,a) + 0x5cb0a9dc + W[22];
	121	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
	122	t1 = a + e1(f) + Ch(f,g,h) + 0x76f988da + W[23];
	123	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
	124
	125	t1 = h + e1(e) + Ch(e,f,g) + 0x983e5152 + W[24];
	126	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
	127	t1 = g + e1(d) + Ch(d,e,f) + 0xa831c66d + W[25];
	128	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
	129	t1 = f + e1(c) + Ch(c,d,e) + 0xb00327c8 + W[26];
	130	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
	131	t1 = e + e1(b) + Ch(b,c,d) + 0xbf597fc7 + W[27];
	132	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
133	t1 = d + e1(a) + Ch(a,b,c) + 0xc6e00bf3 + W[28];
134	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
135	t1 = c + e1(h) + Ch(h,a,b) + 0xd5a79147 + W[29];
136	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
137	t1 = b + e1(g) + Ch(g,h,a) + 0x06ca6351 + W[30];
138	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
139	t1 = a + e1(f) + Ch(f,g,h) + 0x14292967 + W[31];
140	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
141
142	t1 = h + e1(e) + Ch(e,f,g) + 0x27b70a85 + W[32];
143	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
144	t1 = g + e1(d) + Ch(d,e,f) + 0x2e1b2138 + W[33];
145	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
146	t1 = f + e1(c) + Ch(c,d,e) + 0x4d2c6dfc + W[34];
147	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
148	t1 = e + e1(b) + Ch(b,c,d) + 0x53380d13 + W[35];
149	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
150	t1 = d + e1(a) + Ch(a,b,c) + 0x650a7354 + W[36];
151	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
152	t1 = c + e1(h) + Ch(h,a,b) + 0x766a0abb + W[37];
153	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
154	t1 = b + e1(g) + Ch(g,h,a) + 0x81c2c92e + W[38];
155	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
156	t1 = a + e1(f) + Ch(f,g,h) + 0x92722c85 + W[39];
157	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
158
159	t1 = h + e1(e) + Ch(e,f,g) + 0xa2bfe8a1 + W[40];
160	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
161	t1 = g + e1(d) + Ch(d,e,f) + 0xa81a664b + W[41];
162	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
163	t1 = f + e1(c) + Ch(c,d,e) + 0xc24b8b70 + W[42];
164	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
165	t1 = e + e1(b) + Ch(b,c,d) + 0xc76c51a3 + W[43];
166	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
167	t1 = d + e1(a) + Ch(a,b,c) + 0xd192e819 + W[44];
168	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
169	t1 = c + e1(h) + Ch(h,a,b) + 0xd6990624 + W[45];
170	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
171	t1 = b + e1(g) + Ch(g,h,a) + 0xf40e3585 + W[46];
172	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
173	t1 = a + e1(f) + Ch(f,g,h) + 0x106aa070 + W[47];
174	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
175
176	t1 = h + e1(e) + Ch(e,f,g) + 0x19a4c116 + W[48];
177	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
178	t1 = g + e1(d) + Ch(d,e,f) + 0x1e376c08 + W[49];
179	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
180	t1 = f + e1(c) + Ch(c,d,e) + 0x2748774c + W[50];
181	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
182	t1 = e + e1(b) + Ch(b,c,d) + 0x34b0bcb5 + W[51];
183	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
184	t1 = d + e1(a) + Ch(a,b,c) + 0x391c0cb3 + W[52];
185	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
186	t1 = c + e1(h) + Ch(h,a,b) + 0x4ed8aa4a + W[53];
187	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
188	t1 = b + e1(g) + Ch(g,h,a) + 0x5b9cca4f + W[54];
189	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
190	t1 = a + e1(f) + Ch(f,g,h) + 0x682e6ff3 + W[55];
191	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
192
193	t1 = h + e1(e) + Ch(e,f,g) + 0x748f82ee + W[56];
194	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
195	t1 = g + e1(d) + Ch(d,e,f) + 0x78a5636f + W[57];
196	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
197	t1 = f + e1(c) + Ch(c,d,e) + 0x84c87814 + W[58];
198	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
199	t1 = e + e1(b) + Ch(b,c,d) + 0x8cc70208 + W[59];
200	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
201	t1 = d + e1(a) + Ch(a,b,c) + 0x90befffa + W[60];
202	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
203	t1 = c + e1(h) + Ch(h,a,b) + 0xa4506ceb + W[61];
204	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
205	t1 = b + e1(g) + Ch(g,h,a) + 0xbef9a3f7 + W[62];
206	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
207	t1 = a + e1(f) + Ch(f,g,h) + 0xc67178f2 + W[63];
208	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
209
210	state[0] += a; state[1] += b; state[2] += c; state[3] += d;
211	state[4] += e; state[5] += f; state[6] += g; state[7] += h;
212
213	/* clear any sensitive info... */
214	a = b = c = d = e = f = g = h = t1 = t2 = 0;
7185ad26	215	memzero_explicit(W, 64 * sizeof(u32));
1da177e4 LT	216	}
1da177e4 LT	217
a2e5ba4f AB	218	static void sha256_generic_block_fn(struct sha256_state sst, u8 const src,
a2e5ba4f AB	219	int blocks)
cd12fb90	220	{
a2e5ba4f AB	221	while (blocks--) {
	222	sha256_transform(sst->state, src);
	223	src += SHA256_BLOCK_SIZE;
	224	}
1da177e4 LT	225	}
1da177e4 LT	226
35d2c9d0	227	int crypto_sha256_update(struct shash_desc desc, const u8 data,
6c2bb98b	228	unsigned int len)
1da177e4	229	{
a2e5ba4f	230	return sha256_base_do_update(desc, data, len, sha256_generic_block_fn);
1da177e4	231	}
35d2c9d0	232	EXPORT_SYMBOL(crypto_sha256_update);
1da177e4	233
50e109b5	234	static int sha256_final(struct shash_desc desc, u8 out)
1da177e4	235	{
a2e5ba4f AB	236	sha256_base_do_finalize(desc, sha256_generic_block_fn);
a2e5ba4f AB	237	return sha256_base_finish(desc, out);
1da177e4 LT	238	}
1da177e4 LT	239
a2e5ba4f AB	240	int crypto_sha256_finup(struct shash_desc desc, const u8 data,
a2e5ba4f AB	241	unsigned int len, u8 *hash)
cd12fb90	242	{
a2e5ba4f AB	243	sha256_base_do_update(desc, data, len, sha256_generic_block_fn);
a2e5ba4f AB	244	return sha256_final(desc, hash);
9b2fda7b	245	}
a2e5ba4f	246	EXPORT_SYMBOL(crypto_sha256_finup);
9b2fda7b	247
6aeb49bc	248	static struct shash_alg sha256_algs[2] = { {
50e109b5	249	.digestsize = SHA256_DIGEST_SIZE,
a2e5ba4f	250	.init = sha256_base_init,
35d2c9d0	251	.update = crypto_sha256_update,
50e109b5	252	.final = sha256_final,
a2e5ba4f	253	.finup = crypto_sha256_finup,
9b2fda7b	254	.descsize = sizeof(struct sha256_state),
50e109b5 AKR	255	.base = {
	256	.cra_name = "sha256",
	257	.cra_driver_name= "sha256-generic",
	258	.cra_flags = CRYPTO_ALG_TYPE_SHASH,
	259	.cra_blocksize = SHA256_BLOCK_SIZE,
	260	.cra_module = THIS_MODULE,
	261	}
6aeb49bc	262	}, {
50e109b5	263	.digestsize = SHA224_DIGEST_SIZE,
a2e5ba4f	264	.init = sha224_base_init,
35d2c9d0	265	.update = crypto_sha256_update,
a2e5ba4f AB	266	.final = sha256_final,
a2e5ba4f AB	267	.finup = crypto_sha256_finup,
9b2fda7b	268	.descsize = sizeof(struct sha256_state),
50e109b5 AKR	269	.base = {
	270	.cra_name = "sha224",
	271	.cra_driver_name= "sha224-generic",
	272	.cra_flags = CRYPTO_ALG_TYPE_SHASH,
	273	.cra_blocksize = SHA224_BLOCK_SIZE,
	274	.cra_module = THIS_MODULE,
	275	}
6aeb49bc	276	} };
1da177e4	277
3af5b90b	278	static int __init sha256_generic_mod_init(void)
1da177e4	279	{
6aeb49bc	280	return crypto_register_shashes(sha256_algs, ARRAY_SIZE(sha256_algs));
1da177e4 LT	281	}
1da177e4 LT	282
3af5b90b	283	static void __exit sha256_generic_mod_fini(void)
1da177e4	284	{
6aeb49bc	285	crypto_unregister_shashes(sha256_algs, ARRAY_SIZE(sha256_algs));
1da177e4 LT	286	}
1da177e4 LT	287
3af5b90b KB	288	module_init(sha256_generic_mod_init);
3af5b90b KB	289	module_exit(sha256_generic_mod_fini);
1da177e4 LT	290
1da177e4 LT	291	MODULE_LICENSE("GPL");
cd12fb90	292	MODULE_DESCRIPTION("SHA-224 and SHA-256 Secure Hash Algorithm");
b3be9a6d	293
5d26a105	294	MODULE_ALIAS_CRYPTO("sha224");
3e14dcf7	295	MODULE_ALIAS_CRYPTO("sha224-generic");
5d26a105	296	MODULE_ALIAS_CRYPTO("sha256");
3e14dcf7	297	MODULE_ALIAS_CRYPTO("sha256-generic");