[GitHub/mt8127/android_kernel_alcatel_ttab.git] / crypto / sha256_generic.c

/*
 * Cryptographic API.
 *
 * SHA-256, as specified in
 * http://csrc.nist.gov/cryptval/shs/sha256-384-512.pdf
 *
 * SHA-256 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) 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
 * 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 <asm/byteorder.h>

struct sha256_ctx {
	u32 count[2];
	u32 state[8];
	u8 buf[128];
};

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] = __be32_to_cpu( ((__be32*)(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;
	memset(W, 0, 64 * sizeof(u32));
}


static int sha224_init(struct shash_desc *desc)
{
	struct sha256_ctx *sctx = shash_desc_ctx(desc);
	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;

	return 0;
}

static int sha256_init(struct shash_desc *desc)
{
	struct sha256_ctx *sctx = shash_desc_ctx(desc);
	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;

	return 0;
}

static int sha256_update(struct shash_desc *desc, const u8 *data,
			  unsigned int len)
{
	struct sha256_ctx *sctx = shash_desc_ctx(desc);
	unsigned int i, index, part_len;

	/* Compute number of bytes mod 128 */
	index = (unsigned int)((sctx->count[0] >> 3) & 0x3f);

	/* Update number of bits */
	if ((sctx->count[0] += (len << 3)) < (len << 3)) {
		sctx->count[1]++;
		sctx->count[1] += (len >> 29);
	}

	part_len = 64 - index;

	/* Transform as many times as possible. */
	if (len >= part_len) {
		memcpy(&sctx->buf[index], data, part_len);
		sha256_transform(sctx->state, sctx->buf);

		for (i = part_len; i + 63 < len; i += 64)
			sha256_transform(sctx->state, &data[i]);
		index = 0;
	} else {
		i = 0;
	}

	/* Buffer remaining input */
	memcpy(&sctx->buf[index], &data[i], len-i);

	return 0;
}

static int sha256_final(struct shash_desc *desc, u8 *out)
{
	struct sha256_ctx *sctx = shash_desc_ctx(desc);
	__be32 *dst = (__be32 *)out;
	__be32 bits[2];
	unsigned int index, pad_len;
	int i;
	static const u8 padding[64] = { 0x80, };

	/* Save number of bits */
	bits[1] = cpu_to_be32(sctx->count[0]);
	bits[0] = cpu_to_be32(sctx->count[1]);

	/* Pad out to 56 mod 64. */
	index = (sctx->count[0] >> 3) & 0x3f;
	pad_len = (index < 56) ? (56 - index) : ((64+56) - index);
	sha256_update(desc, padding, pad_len);

	/* Append length (before padding) */
	sha256_update(desc, (const u8 *)bits, sizeof(bits));

	/* Store state in digest */
	for (i = 0; i < 8; i++)
		dst[i] = cpu_to_be32(sctx->state[i]);

	/* Zeroize sensitive information. */
	memset(sctx, 0, sizeof(*sctx));

	return 0;
}

static int sha224_final(struct shash_desc *desc, u8 *hash)
{
	u8 D[SHA256_DIGEST_SIZE];

	sha256_final(desc, D);

	memcpy(hash, D, SHA224_DIGEST_SIZE);
	memset(D, 0, SHA256_DIGEST_SIZE);

	return 0;
}

static struct shash_alg sha256 = {
	.digestsize	=	SHA256_DIGEST_SIZE,
	.init		=	sha256_init,
	.update		=	sha256_update,
	.final		=	sha256_final,
	.descsize	=	sizeof(struct sha256_ctx),
	.base		=	{
		.cra_name	=	"sha256",
		.cra_driver_name=	"sha256-generic",
		.cra_flags	=	CRYPTO_ALG_TYPE_SHASH,
		.cra_blocksize	=	SHA256_BLOCK_SIZE,
		.cra_module	=	THIS_MODULE,
	}
};

static struct shash_alg sha224 = {
	.digestsize	=	SHA224_DIGEST_SIZE,
	.init		=	sha224_init,
	.update		=	sha256_update,
	.final		=	sha224_final,
	.descsize	=	sizeof(struct sha256_ctx),
	.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)
{
	int ret = 0;

	ret = crypto_register_shash(&sha224);

	if (ret < 0)
		return ret;

	ret = crypto_register_shash(&sha256);

	if (ret < 0)
		crypto_unregister_shash(&sha224);

	return ret;
}

static void __exit sha256_generic_mod_fini(void)
{
	crypto_unregister_shash(&sha224);
	crypto_unregister_shash(&sha256);
}

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("sha224");
MODULE_ALIAS("sha256");
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Cryptographic API.
	3	*
	4	* SHA-256, as specified in
	5	* http://csrc.nist.gov/cryptval/shs/sha256-384-512.pdf
	6	*
	7	* SHA-256 code by Jean-Luc Cooke <jlcooke@certainkey.com>.
	8	*
	9	* Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
	10	* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
	11	* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
cd12fb90	12	* SHA224 Support Copyright 2007 Intel Corporation <jonathan.lynch@intel.com>
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>
1da177e4 LT	26	#include <asm/byteorder.h>
1da177e4 LT	27
1da177e4 LT	28	struct sha256_ctx {
	29	u32 count[2];
	30	u32 state[8];
	31	u8 buf[128];
	32	};
	33
	34	static inline u32 Ch(u32 x, u32 y, u32 z)
	35	{
	36	return z ^ (x & (y ^ z));
	37	}
	38
	39	static inline u32 Maj(u32 x, u32 y, u32 z)
	40	{
	41	return (x & y) \| (z & (x \| y));
	42	}
	43
	44	#define e0(x) (ror32(x, 2) ^ ror32(x,13) ^ ror32(x,22))
	45	#define e1(x) (ror32(x, 6) ^ ror32(x,11) ^ ror32(x,25))
	46	#define s0(x) (ror32(x, 7) ^ ror32(x,18) ^ (x >> 3))
	47	#define s1(x) (ror32(x,17) ^ ror32(x,19) ^ (x >> 10))
	48
1da177e4 LT	49	static inline void LOAD_OP(int I, u32 W, const u8 input)
	50	{
	51	W[I] = __be32_to_cpu( ((__be32*)(input))[I] );
	52	}
	53
	54	static inline void BLEND_OP(int I, u32 *W)
	55	{
	56	W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16];
	57	}
	58
	59	static void sha256_transform(u32 state, const u8 input)
	60	{
	61	u32 a, b, c, d, e, f, g, h, t1, t2;
	62	u32 W[64];
	63	int i;
	64
	65	/* load the input */
	66	for (i = 0; i < 16; i++)
	67	LOAD_OP(i, W, input);
	68
	69	/* now blend */
	70	for (i = 16; i < 64; i++)
	71	BLEND_OP(i, W);
50e109b5	72
1da177e4 LT	73	/* load the state into our registers */
	74	a=state[0]; b=state[1]; c=state[2]; d=state[3];
	75	e=state[4]; f=state[5]; g=state[6]; h=state[7];
	76
	77	/* now iterate */
	78	t1 = h + e1(e) + Ch(e,f,g) + 0x428a2f98 + W[ 0];
	79	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
	80	t1 = g + e1(d) + Ch(d,e,f) + 0x71374491 + W[ 1];
	81	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
	82	t1 = f + e1(c) + Ch(c,d,e) + 0xb5c0fbcf + W[ 2];
	83	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
	84	t1 = e + e1(b) + Ch(b,c,d) + 0xe9b5dba5 + W[ 3];
	85	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
	86	t1 = d + e1(a) + Ch(a,b,c) + 0x3956c25b + W[ 4];
	87	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
	88	t1 = c + e1(h) + Ch(h,a,b) + 0x59f111f1 + W[ 5];
	89	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
	90	t1 = b + e1(g) + Ch(g,h,a) + 0x923f82a4 + W[ 6];
	91	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
	92	t1 = a + e1(f) + Ch(f,g,h) + 0xab1c5ed5 + W[ 7];
	93	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
	94
	95	t1 = h + e1(e) + Ch(e,f,g) + 0xd807aa98 + W[ 8];
	96	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
	97	t1 = g + e1(d) + Ch(d,e,f) + 0x12835b01 + W[ 9];
	98	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
	99	t1 = f + e1(c) + Ch(c,d,e) + 0x243185be + W[10];
	100	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
	101	t1 = e + e1(b) + Ch(b,c,d) + 0x550c7dc3 + W[11];
	102	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
	103	t1 = d + e1(a) + Ch(a,b,c) + 0x72be5d74 + W[12];
	104	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
	105	t1 = c + e1(h) + Ch(h,a,b) + 0x80deb1fe + W[13];
	106	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
	107	t1 = b + e1(g) + Ch(g,h,a) + 0x9bdc06a7 + W[14];
	108	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
	109	t1 = a + e1(f) + Ch(f,g,h) + 0xc19bf174 + W[15];
	110	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
	111
	112	t1 = h + e1(e) + Ch(e,f,g) + 0xe49b69c1 + W[16];
	113	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
	114	t1 = g + e1(d) + Ch(d,e,f) + 0xefbe4786 + W[17];
	115	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
	116	t1 = f + e1(c) + Ch(c,d,e) + 0x0fc19dc6 + W[18];
	117	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
	118	t1 = e + e1(b) + Ch(b,c,d) + 0x240ca1cc + W[19];
	119	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
	120	t1 = d + e1(a) + Ch(a,b,c) + 0x2de92c6f + W[20];
	121	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
	122	t1 = c + e1(h) + Ch(h,a,b) + 0x4a7484aa + W[21];
	123	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
	124	t1 = b + e1(g) + Ch(g,h,a) + 0x5cb0a9dc + W[22];
	125	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
	126	t1 = a + e1(f) + Ch(f,g,h) + 0x76f988da + W[23];
	127	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
	128
	129	t1 = h + e1(e) + Ch(e,f,g) + 0x983e5152 + W[24];
	130	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
	131	t1 = g + e1(d) + Ch(d,e,f) + 0xa831c66d + W[25];
	132	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
	133	t1 = f + e1(c) + Ch(c,d,e) + 0xb00327c8 + W[26];
	134	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
	135	t1 = e + e1(b) + Ch(b,c,d) + 0xbf597fc7 + W[27];
	136	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
137	t1 = d + e1(a) + Ch(a,b,c) + 0xc6e00bf3 + W[28];
138	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
139	t1 = c + e1(h) + Ch(h,a,b) + 0xd5a79147 + W[29];
140	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
141	t1 = b + e1(g) + Ch(g,h,a) + 0x06ca6351 + W[30];
142	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
143	t1 = a + e1(f) + Ch(f,g,h) + 0x14292967 + W[31];
144	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
145
146	t1 = h + e1(e) + Ch(e,f,g) + 0x27b70a85 + W[32];
147	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
148	t1 = g + e1(d) + Ch(d,e,f) + 0x2e1b2138 + W[33];
149	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
150	t1 = f + e1(c) + Ch(c,d,e) + 0x4d2c6dfc + W[34];
151	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
152	t1 = e + e1(b) + Ch(b,c,d) + 0x53380d13 + W[35];
153	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
154	t1 = d + e1(a) + Ch(a,b,c) + 0x650a7354 + W[36];
155	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
156	t1 = c + e1(h) + Ch(h,a,b) + 0x766a0abb + W[37];
157	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
158	t1 = b + e1(g) + Ch(g,h,a) + 0x81c2c92e + W[38];
159	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
160	t1 = a + e1(f) + Ch(f,g,h) + 0x92722c85 + W[39];
161	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
162
163	t1 = h + e1(e) + Ch(e,f,g) + 0xa2bfe8a1 + W[40];
164	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
165	t1 = g + e1(d) + Ch(d,e,f) + 0xa81a664b + W[41];
166	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
167	t1 = f + e1(c) + Ch(c,d,e) + 0xc24b8b70 + W[42];
168	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
169	t1 = e + e1(b) + Ch(b,c,d) + 0xc76c51a3 + W[43];
170	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
171	t1 = d + e1(a) + Ch(a,b,c) + 0xd192e819 + W[44];
172	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
173	t1 = c + e1(h) + Ch(h,a,b) + 0xd6990624 + W[45];
174	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
175	t1 = b + e1(g) + Ch(g,h,a) + 0xf40e3585 + W[46];
176	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
177	t1 = a + e1(f) + Ch(f,g,h) + 0x106aa070 + W[47];
178	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
179
180	t1 = h + e1(e) + Ch(e,f,g) + 0x19a4c116 + W[48];
181	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
182	t1 = g + e1(d) + Ch(d,e,f) + 0x1e376c08 + W[49];
183	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
184	t1 = f + e1(c) + Ch(c,d,e) + 0x2748774c + W[50];
185	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
186	t1 = e + e1(b) + Ch(b,c,d) + 0x34b0bcb5 + W[51];
187	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
188	t1 = d + e1(a) + Ch(a,b,c) + 0x391c0cb3 + W[52];
189	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
190	t1 = c + e1(h) + Ch(h,a,b) + 0x4ed8aa4a + W[53];
191	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
192	t1 = b + e1(g) + Ch(g,h,a) + 0x5b9cca4f + W[54];
193	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
194	t1 = a + e1(f) + Ch(f,g,h) + 0x682e6ff3 + W[55];
195	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
196
197	t1 = h + e1(e) + Ch(e,f,g) + 0x748f82ee + W[56];
198	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
199	t1 = g + e1(d) + Ch(d,e,f) + 0x78a5636f + W[57];
200	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
201	t1 = f + e1(c) + Ch(c,d,e) + 0x84c87814 + W[58];
202	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
203	t1 = e + e1(b) + Ch(b,c,d) + 0x8cc70208 + W[59];
204	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
205	t1 = d + e1(a) + Ch(a,b,c) + 0x90befffa + W[60];
206	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
207	t1 = c + e1(h) + Ch(h,a,b) + 0xa4506ceb + W[61];
208	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
209	t1 = b + e1(g) + Ch(g,h,a) + 0xbef9a3f7 + W[62];
210	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
211	t1 = a + e1(f) + Ch(f,g,h) + 0xc67178f2 + W[63];
212	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
213
214	state[0] += a; state[1] += b; state[2] += c; state[3] += d;
215	state[4] += e; state[5] += f; state[6] += g; state[7] += h;
216
217	/* clear any sensitive info... */
218	a = b = c = d = e = f = g = h = t1 = t2 = 0;
219	memset(W, 0, 64 * sizeof(u32));
220	}
221
cd12fb90	222
50e109b5	223	static int sha224_init(struct shash_desc *desc)
cd12fb90	224	{
50e109b5	225	struct sha256_ctx *sctx = shash_desc_ctx(desc);
cd12fb90 JL	226	sctx->state[0] = SHA224_H0;
	227	sctx->state[1] = SHA224_H1;
	228	sctx->state[2] = SHA224_H2;
	229	sctx->state[3] = SHA224_H3;
	230	sctx->state[4] = SHA224_H4;
	231	sctx->state[5] = SHA224_H5;
	232	sctx->state[6] = SHA224_H6;
	233	sctx->state[7] = SHA224_H7;
	234	sctx->count[0] = 0;
	235	sctx->count[1] = 0;
50e109b5 AKR	236
50e109b5 AKR	237	return 0;
cd12fb90 JL	238	}
cd12fb90 JL	239
50e109b5	240	static int sha256_init(struct shash_desc *desc)
1da177e4	241	{
50e109b5	242	struct sha256_ctx *sctx = shash_desc_ctx(desc);
5265eeb2 JG	243	sctx->state[0] = SHA256_H0;
	244	sctx->state[1] = SHA256_H1;
	245	sctx->state[2] = SHA256_H2;
	246	sctx->state[3] = SHA256_H3;
	247	sctx->state[4] = SHA256_H4;
	248	sctx->state[5] = SHA256_H5;
	249	sctx->state[6] = SHA256_H6;
	250	sctx->state[7] = SHA256_H7;
1da177e4	251	sctx->count[0] = sctx->count[1] = 0;
50e109b5 AKR	252
50e109b5 AKR	253	return 0;
1da177e4 LT	254	}
1da177e4 LT	255
50e109b5	256	static int sha256_update(struct shash_desc desc, const u8 data,
6c2bb98b	257	unsigned int len)
1da177e4	258	{
50e109b5	259	struct sha256_ctx *sctx = shash_desc_ctx(desc);
1da177e4 LT	260	unsigned int i, index, part_len;
	261
	262	/* Compute number of bytes mod 128 */
	263	index = (unsigned int)((sctx->count[0] >> 3) & 0x3f);
	264
	265	/* Update number of bits */
	266	if ((sctx->count[0] += (len << 3)) < (len << 3)) {
	267	sctx->count[1]++;
	268	sctx->count[1] += (len >> 29);
	269	}
	270
	271	part_len = 64 - index;
	272
	273	/* Transform as many times as possible. */
	274	if (len >= part_len) {
	275	memcpy(&sctx->buf[index], data, part_len);
	276	sha256_transform(sctx->state, sctx->buf);
	277
	278	for (i = part_len; i + 63 < len; i += 64)
	279	sha256_transform(sctx->state, &data[i]);
	280	index = 0;
	281	} else {
	282	i = 0;
	283	}
50e109b5	284
1da177e4 LT	285	/* Buffer remaining input */
1da177e4 LT	286	memcpy(&sctx->buf[index], &data[i], len-i);
50e109b5 AKR	287
50e109b5 AKR	288	return 0;
1da177e4 LT	289	}
1da177e4 LT	290
50e109b5	291	static int sha256_final(struct shash_desc desc, u8 out)
1da177e4	292	{
50e109b5	293	struct sha256_ctx *sctx = shash_desc_ctx(desc);
06ace7a9 HX	294	__be32 dst = (__be32 )out;
	295	__be32 bits[2];
	296	unsigned int index, pad_len;
	297	int i;
1da177e4 LT	298	static const u8 padding[64] = { 0x80, };
	299
	300	/* Save number of bits */
06ace7a9 HX	301	bits[1] = cpu_to_be32(sctx->count[0]);
06ace7a9 HX	302	bits[0] = cpu_to_be32(sctx->count[1]);
1da177e4 LT	303
	304	/* Pad out to 56 mod 64. */
	305	index = (sctx->count[0] >> 3) & 0x3f;
	306	pad_len = (index < 56) ? (56 - index) : ((64+56) - index);
50e109b5	307	sha256_update(desc, padding, pad_len);
1da177e4 LT	308
1da177e4 LT	309	/* Append length (before padding) */
50e109b5	310	sha256_update(desc, (const u8 *)bits, sizeof(bits));
1da177e4 LT	311
1da177e4 LT	312	/* Store state in digest */
06ace7a9 HX	313	for (i = 0; i < 8; i++)
06ace7a9 HX	314	dst[i] = cpu_to_be32(sctx->state[i]);
1da177e4 LT	315
	316	/* Zeroize sensitive information. */
	317	memset(sctx, 0, sizeof(*sctx));
50e109b5 AKR	318
50e109b5 AKR	319	return 0;
1da177e4 LT	320	}
1da177e4 LT	321
50e109b5	322	static int sha224_final(struct shash_desc desc, u8 hash)
cd12fb90 JL	323	{
	324	u8 D[SHA256_DIGEST_SIZE];
	325
50e109b5	326	sha256_final(desc, D);
cd12fb90 JL	327
	328	memcpy(hash, D, SHA224_DIGEST_SIZE);
	329	memset(D, 0, SHA256_DIGEST_SIZE);
50e109b5 AKR	330
50e109b5 AKR	331	return 0;
cd12fb90	332	}
1da177e4	333
50e109b5 AKR	334	static struct shash_alg sha256 = {
	335	.digestsize = SHA256_DIGEST_SIZE,
	336	.init = sha256_init,
	337	.update = sha256_update,
	338	.final = sha256_final,
	339	.descsize = sizeof(struct sha256_ctx),
	340	.base = {
	341	.cra_name = "sha256",
	342	.cra_driver_name= "sha256-generic",
	343	.cra_flags = CRYPTO_ALG_TYPE_SHASH,
	344	.cra_blocksize = SHA256_BLOCK_SIZE,
	345	.cra_module = THIS_MODULE,
	346	}
cd12fb90 JL	347	};
cd12fb90 JL	348
50e109b5 AKR	349	static struct shash_alg sha224 = {
	350	.digestsize = SHA224_DIGEST_SIZE,
	351	.init = sha224_init,
	352	.update = sha256_update,
	353	.final = sha224_final,
	354	.descsize = sizeof(struct sha256_ctx),
	355	.base = {
	356	.cra_name = "sha224",
	357	.cra_driver_name= "sha224-generic",
	358	.cra_flags = CRYPTO_ALG_TYPE_SHASH,
	359	.cra_blocksize = SHA224_BLOCK_SIZE,
	360	.cra_module = THIS_MODULE,
	361	}
1da177e4 LT	362	};
1da177e4 LT	363
3af5b90b	364	static int __init sha256_generic_mod_init(void)
1da177e4	365	{
cd12fb90 JL	366	int ret = 0;
cd12fb90 JL	367
50e109b5	368	ret = crypto_register_shash(&sha224);
cd12fb90 JL	369
	370	if (ret < 0)
	371	return ret;
	372
50e109b5	373	ret = crypto_register_shash(&sha256);
cd12fb90 JL	374
cd12fb90 JL	375	if (ret < 0)
50e109b5	376	crypto_unregister_shash(&sha224);
cd12fb90 JL	377
cd12fb90 JL	378	return ret;
1da177e4 LT	379	}
1da177e4 LT	380
3af5b90b	381	static void __exit sha256_generic_mod_fini(void)
1da177e4	382	{
50e109b5 AKR	383	crypto_unregister_shash(&sha224);
50e109b5 AKR	384	crypto_unregister_shash(&sha256);
1da177e4 LT	385	}
1da177e4 LT	386
3af5b90b KB	387	module_init(sha256_generic_mod_init);
3af5b90b KB	388	module_exit(sha256_generic_mod_fini);
1da177e4 LT	389
1da177e4 LT	390	MODULE_LICENSE("GPL");
cd12fb90	391	MODULE_DESCRIPTION("SHA-224 and SHA-256 Secure Hash Algorithm");
b3be9a6d	392
cd12fb90	393	MODULE_ALIAS("sha224");
ad5d2789	394	MODULE_ALIAS("sha256");