[GitHub/mt8127/android_kernel_alcatel_ttab.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 <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>

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_state *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;

	return 0;
}

static int sha256_init(struct shash_desc *desc)
{
	struct sha256_state *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;

	return 0;
}

int crypto_sha256_update(struct shash_desc *desc, const u8 *data,
			  unsigned int len)
{
	struct sha256_state *sctx = shash_desc_ctx(desc);
	unsigned int partial, done;
	const u8 *src;

	partial = sctx->count & 0x3f;
	sctx->count += len;
	done = 0;
	src = data;

	if ((partial + len) > 63) {
		if (partial) {
			done = -partial;
			memcpy(sctx->buf + partial, data, done + 64);
			src = sctx->buf;
		}

		do {
			sha256_transform(sctx->state, src);
			done += 64;
			src = data + done;
		} while (done + 63 < len);

		partial = 0;
	}
	memcpy(sctx->buf + partial, src, len - done);

	return 0;
}
EXPORT_SYMBOL(crypto_sha256_update);

static int sha256_final(struct shash_desc *desc, u8 *out)
{
	struct sha256_state *sctx = shash_desc_ctx(desc);
	__be32 *dst = (__be32 *)out;
	__be64 bits;
	unsigned int index, pad_len;
	int i;
	static const u8 padding[64] = { 0x80, };

	/* Save number of bits */
	bits = cpu_to_be64(sctx->count << 3);

	/* Pad out to 56 mod 64. */
	index = sctx->count & 0x3f;
	pad_len = (index < 56) ? (56 - index) : ((64+56) - index);
	crypto_sha256_update(desc, padding, pad_len);

	/* Append length (before padding) */
	crypto_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 int sha256_export(struct shash_desc *desc, void *out)
{
	struct sha256_state *sctx = shash_desc_ctx(desc);

	memcpy(out, sctx, sizeof(*sctx));
	return 0;
}

static int sha256_import(struct shash_desc *desc, const void *in)
{
	struct sha256_state *sctx = shash_desc_ctx(desc);

	memcpy(sctx, in, sizeof(*sctx));
	return 0;
}

static struct shash_alg sha256_algs[2] = { {
	.digestsize	=	SHA256_DIGEST_SIZE,
	.init		=	sha256_init,
	.update		=	crypto_sha256_update,
	.final		=	sha256_final,
	.export		=	sha256_export,
	.import		=	sha256_import,
	.descsize	=	sizeof(struct sha256_state),
	.statesize	=	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_init,
	.update		=	crypto_sha256_update,
	.final		=	sha224_final,
	.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 <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	static inline u32 Ch(u32 x, u32 y, u32 z)
	29	{
	30	return z ^ (x & (y ^ z));
	31	}
	32
	33	static inline u32 Maj(u32 x, u32 y, u32 z)
	34	{
	35	return (x & y) \| (z & (x \| y));
	36	}
	37
	38	#define e0(x) (ror32(x, 2) ^ ror32(x,13) ^ ror32(x,22))
	39	#define e1(x) (ror32(x, 6) ^ ror32(x,11) ^ ror32(x,25))
	40	#define s0(x) (ror32(x, 7) ^ ror32(x,18) ^ (x >> 3))
	41	#define s1(x) (ror32(x,17) ^ ror32(x,19) ^ (x >> 10))
	42
1da177e4 LT	43	static inline void LOAD_OP(int I, u32 W, const u8 input)
	44	{
	45	W[I] = __be32_to_cpu( ((__be32*)(input))[I] );
	46	}
	47
	48	static inline void BLEND_OP(int I, u32 *W)
	49	{
	50	W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16];
	51	}
	52
	53	static void sha256_transform(u32 state, const u8 input)
	54	{
	55	u32 a, b, c, d, e, f, g, h, t1, t2;
	56	u32 W[64];
	57	int i;
	58
	59	/* load the input */
	60	for (i = 0; i < 16; i++)
	61	LOAD_OP(i, W, input);
	62
	63	/* now blend */
	64	for (i = 16; i < 64; i++)
	65	BLEND_OP(i, W);
50e109b5	66
1da177e4 LT	67	/* load the state into our registers */
	68	a=state[0]; b=state[1]; c=state[2]; d=state[3];
	69	e=state[4]; f=state[5]; g=state[6]; h=state[7];
	70
	71	/* now iterate */
	72	t1 = h + e1(e) + Ch(e,f,g) + 0x428a2f98 + W[ 0];
	73	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
	74	t1 = g + e1(d) + Ch(d,e,f) + 0x71374491 + W[ 1];
	75	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
	76	t1 = f + e1(c) + Ch(c,d,e) + 0xb5c0fbcf + W[ 2];
	77	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
	78	t1 = e + e1(b) + Ch(b,c,d) + 0xe9b5dba5 + W[ 3];
	79	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
	80	t1 = d + e1(a) + Ch(a,b,c) + 0x3956c25b + W[ 4];
	81	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
	82	t1 = c + e1(h) + Ch(h,a,b) + 0x59f111f1 + W[ 5];
	83	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
	84	t1 = b + e1(g) + Ch(g,h,a) + 0x923f82a4 + W[ 6];
	85	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
	86	t1 = a + e1(f) + Ch(f,g,h) + 0xab1c5ed5 + W[ 7];
	87	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
	88
	89	t1 = h + e1(e) + Ch(e,f,g) + 0xd807aa98 + W[ 8];
	90	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
	91	t1 = g + e1(d) + Ch(d,e,f) + 0x12835b01 + W[ 9];
	92	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
	93	t1 = f + e1(c) + Ch(c,d,e) + 0x243185be + W[10];
	94	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
	95	t1 = e + e1(b) + Ch(b,c,d) + 0x550c7dc3 + W[11];
	96	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
	97	t1 = d + e1(a) + Ch(a,b,c) + 0x72be5d74 + W[12];
	98	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
	99	t1 = c + e1(h) + Ch(h,a,b) + 0x80deb1fe + W[13];
	100	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
	101	t1 = b + e1(g) + Ch(g,h,a) + 0x9bdc06a7 + W[14];
	102	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
	103	t1 = a + e1(f) + Ch(f,g,h) + 0xc19bf174 + W[15];
	104	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
	105
	106	t1 = h + e1(e) + Ch(e,f,g) + 0xe49b69c1 + W[16];
	107	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
	108	t1 = g + e1(d) + Ch(d,e,f) + 0xefbe4786 + W[17];
	109	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
	110	t1 = f + e1(c) + Ch(c,d,e) + 0x0fc19dc6 + W[18];
	111	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
	112	t1 = e + e1(b) + Ch(b,c,d) + 0x240ca1cc + W[19];
	113	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
	114	t1 = d + e1(a) + Ch(a,b,c) + 0x2de92c6f + W[20];
	115	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
	116	t1 = c + e1(h) + Ch(h,a,b) + 0x4a7484aa + W[21];
	117	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
	118	t1 = b + e1(g) + Ch(g,h,a) + 0x5cb0a9dc + W[22];
	119	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
	120	t1 = a + e1(f) + Ch(f,g,h) + 0x76f988da + W[23];
	121	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
	122
	123	t1 = h + e1(e) + Ch(e,f,g) + 0x983e5152 + W[24];
	124	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
	125	t1 = g + e1(d) + Ch(d,e,f) + 0xa831c66d + W[25];
	126	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
	127	t1 = f + e1(c) + Ch(c,d,e) + 0xb00327c8 + W[26];
	128	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
	129	t1 = e + e1(b) + Ch(b,c,d) + 0xbf597fc7 + W[27];
	130	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
131	t1 = d + e1(a) + Ch(a,b,c) + 0xc6e00bf3 + W[28];
132	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
133	t1 = c + e1(h) + Ch(h,a,b) + 0xd5a79147 + W[29];
134	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
135	t1 = b + e1(g) + Ch(g,h,a) + 0x06ca6351 + W[30];
136	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
137	t1 = a + e1(f) + Ch(f,g,h) + 0x14292967 + W[31];
138	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
139
140	t1 = h + e1(e) + Ch(e,f,g) + 0x27b70a85 + W[32];
141	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
142	t1 = g + e1(d) + Ch(d,e,f) + 0x2e1b2138 + W[33];
143	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
144	t1 = f + e1(c) + Ch(c,d,e) + 0x4d2c6dfc + W[34];
145	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
146	t1 = e + e1(b) + Ch(b,c,d) + 0x53380d13 + W[35];
147	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
148	t1 = d + e1(a) + Ch(a,b,c) + 0x650a7354 + W[36];
149	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
150	t1 = c + e1(h) + Ch(h,a,b) + 0x766a0abb + W[37];
151	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
152	t1 = b + e1(g) + Ch(g,h,a) + 0x81c2c92e + W[38];
153	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
154	t1 = a + e1(f) + Ch(f,g,h) + 0x92722c85 + W[39];
155	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
156
157	t1 = h + e1(e) + Ch(e,f,g) + 0xa2bfe8a1 + W[40];
158	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
159	t1 = g + e1(d) + Ch(d,e,f) + 0xa81a664b + W[41];
160	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
161	t1 = f + e1(c) + Ch(c,d,e) + 0xc24b8b70 + W[42];
162	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
163	t1 = e + e1(b) + Ch(b,c,d) + 0xc76c51a3 + W[43];
164	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
165	t1 = d + e1(a) + Ch(a,b,c) + 0xd192e819 + W[44];
166	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
167	t1 = c + e1(h) + Ch(h,a,b) + 0xd6990624 + W[45];
168	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
169	t1 = b + e1(g) + Ch(g,h,a) + 0xf40e3585 + W[46];
170	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
171	t1 = a + e1(f) + Ch(f,g,h) + 0x106aa070 + W[47];
172	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
173
174	t1 = h + e1(e) + Ch(e,f,g) + 0x19a4c116 + W[48];
175	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
176	t1 = g + e1(d) + Ch(d,e,f) + 0x1e376c08 + W[49];
177	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
178	t1 = f + e1(c) + Ch(c,d,e) + 0x2748774c + W[50];
179	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
180	t1 = e + e1(b) + Ch(b,c,d) + 0x34b0bcb5 + W[51];
181	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
182	t1 = d + e1(a) + Ch(a,b,c) + 0x391c0cb3 + W[52];
183	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
184	t1 = c + e1(h) + Ch(h,a,b) + 0x4ed8aa4a + W[53];
185	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
186	t1 = b + e1(g) + Ch(g,h,a) + 0x5b9cca4f + W[54];
187	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
188	t1 = a + e1(f) + Ch(f,g,h) + 0x682e6ff3 + W[55];
189	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
190
191	t1 = h + e1(e) + Ch(e,f,g) + 0x748f82ee + W[56];
192	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
193	t1 = g + e1(d) + Ch(d,e,f) + 0x78a5636f + W[57];
194	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
195	t1 = f + e1(c) + Ch(c,d,e) + 0x84c87814 + W[58];
196	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
197	t1 = e + e1(b) + Ch(b,c,d) + 0x8cc70208 + W[59];
198	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
199	t1 = d + e1(a) + Ch(a,b,c) + 0x90befffa + W[60];
200	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
201	t1 = c + e1(h) + Ch(h,a,b) + 0xa4506ceb + W[61];
202	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
203	t1 = b + e1(g) + Ch(g,h,a) + 0xbef9a3f7 + W[62];
204	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
205	t1 = a + e1(f) + Ch(f,g,h) + 0xc67178f2 + W[63];
206	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
207
208	state[0] += a; state[1] += b; state[2] += c; state[3] += d;
209	state[4] += e; state[5] += f; state[6] += g; state[7] += h;
210
211	/* clear any sensitive info... */
212	a = b = c = d = e = f = g = h = t1 = t2 = 0;
213	memset(W, 0, 64 * sizeof(u32));
214	}
215
cd12fb90	216
50e109b5	217	static int sha224_init(struct shash_desc *desc)
cd12fb90	218	{
9b2fda7b	219	struct sha256_state *sctx = shash_desc_ctx(desc);
cd12fb90 JL	220	sctx->state[0] = SHA224_H0;
	221	sctx->state[1] = SHA224_H1;
	222	sctx->state[2] = SHA224_H2;
	223	sctx->state[3] = SHA224_H3;
	224	sctx->state[4] = SHA224_H4;
	225	sctx->state[5] = SHA224_H5;
	226	sctx->state[6] = SHA224_H6;
	227	sctx->state[7] = SHA224_H7;
3d4d277c	228	sctx->count = 0;
50e109b5 AKR	229
50e109b5 AKR	230	return 0;
cd12fb90 JL	231	}
cd12fb90 JL	232
50e109b5	233	static int sha256_init(struct shash_desc *desc)
1da177e4	234	{
9b2fda7b	235	struct sha256_state *sctx = shash_desc_ctx(desc);
5265eeb2 JG	236	sctx->state[0] = SHA256_H0;
	237	sctx->state[1] = SHA256_H1;
	238	sctx->state[2] = SHA256_H2;
	239	sctx->state[3] = SHA256_H3;
	240	sctx->state[4] = SHA256_H4;
	241	sctx->state[5] = SHA256_H5;
	242	sctx->state[6] = SHA256_H6;
	243	sctx->state[7] = SHA256_H7;
3d4d277c	244	sctx->count = 0;
50e109b5 AKR	245
50e109b5 AKR	246	return 0;
1da177e4 LT	247	}
1da177e4 LT	248
35d2c9d0	249	int crypto_sha256_update(struct shash_desc desc, const u8 data,
6c2bb98b	250	unsigned int len)
1da177e4	251	{
9b2fda7b	252	struct sha256_state *sctx = shash_desc_ctx(desc);
3d4d277c HX	253	unsigned int partial, done;
	254	const u8 *src;
	255
	256	partial = sctx->count & 0x3f;
	257	sctx->count += len;
	258	done = 0;
	259	src = data;
	260
	261	if ((partial + len) > 63) {
	262	if (partial) {
	263	done = -partial;
	264	memcpy(sctx->buf + partial, data, done + 64);
	265	src = sctx->buf;
	266	}
	267
	268	do {
	269	sha256_transform(sctx->state, src);
	270	done += 64;
	271	src = data + done;
	272	} while (done + 63 < len);
	273
	274	partial = 0;
1da177e4	275	}
3d4d277c	276	memcpy(sctx->buf + partial, src, len - done);
50e109b5 AKR	277
50e109b5 AKR	278	return 0;
1da177e4	279	}
35d2c9d0	280	EXPORT_SYMBOL(crypto_sha256_update);
1da177e4	281
50e109b5	282	static int sha256_final(struct shash_desc desc, u8 out)
1da177e4	283	{
9b2fda7b	284	struct sha256_state *sctx = shash_desc_ctx(desc);
06ace7a9	285	__be32 dst = (__be32 )out;
3d4d277c	286	__be64 bits;
06ace7a9 HX	287	unsigned int index, pad_len;
06ace7a9 HX	288	int i;
1da177e4 LT	289	static const u8 padding[64] = { 0x80, };
	290
	291	/* Save number of bits */
3d4d277c	292	bits = cpu_to_be64(sctx->count << 3);
1da177e4 LT	293
1da177e4 LT	294	/* Pad out to 56 mod 64. */
3d4d277c	295	index = sctx->count & 0x3f;
1da177e4	296	pad_len = (index < 56) ? (56 - index) : ((64+56) - index);
35d2c9d0	297	crypto_sha256_update(desc, padding, pad_len);
1da177e4 LT	298
1da177e4 LT	299	/* Append length (before padding) */
35d2c9d0	300	crypto_sha256_update(desc, (const u8 *)&bits, sizeof(bits));
1da177e4 LT	301
1da177e4 LT	302	/* Store state in digest */
06ace7a9 HX	303	for (i = 0; i < 8; i++)
06ace7a9 HX	304	dst[i] = cpu_to_be32(sctx->state[i]);
1da177e4 LT	305
	306	/* Zeroize sensitive information. */
	307	memset(sctx, 0, sizeof(*sctx));
50e109b5 AKR	308
50e109b5 AKR	309	return 0;
1da177e4 LT	310	}
1da177e4 LT	311
50e109b5	312	static int sha224_final(struct shash_desc desc, u8 hash)
cd12fb90 JL	313	{
	314	u8 D[SHA256_DIGEST_SIZE];
	315
50e109b5	316	sha256_final(desc, D);
cd12fb90 JL	317
	318	memcpy(hash, D, SHA224_DIGEST_SIZE);
	319	memset(D, 0, SHA256_DIGEST_SIZE);
50e109b5 AKR	320
50e109b5 AKR	321	return 0;
cd12fb90	322	}
1da177e4	323
9b2fda7b HX	324	static int sha256_export(struct shash_desc desc, void out)
	325	{
	326	struct sha256_state *sctx = shash_desc_ctx(desc);
	327
	328	memcpy(out, sctx, sizeof(*sctx));
	329	return 0;
	330	}
	331
	332	static int sha256_import(struct shash_desc desc, const void in)
	333	{
	334	struct sha256_state *sctx = shash_desc_ctx(desc);
	335
	336	memcpy(sctx, in, sizeof(*sctx));
	337	return 0;
	338	}
	339
6aeb49bc	340	static struct shash_alg sha256_algs[2] = { {
50e109b5 AKR	341	.digestsize = SHA256_DIGEST_SIZE,
50e109b5 AKR	342	.init = sha256_init,
35d2c9d0	343	.update = crypto_sha256_update,
50e109b5	344	.final = sha256_final,
9b2fda7b HX	345	.export = sha256_export,
	346	.import = sha256_import,
	347	.descsize = sizeof(struct sha256_state),
	348	.statesize = sizeof(struct sha256_state),
50e109b5 AKR	349	.base = {
	350	.cra_name = "sha256",
	351	.cra_driver_name= "sha256-generic",
	352	.cra_flags = CRYPTO_ALG_TYPE_SHASH,
	353	.cra_blocksize = SHA256_BLOCK_SIZE,
	354	.cra_module = THIS_MODULE,
	355	}
6aeb49bc	356	}, {
50e109b5 AKR	357	.digestsize = SHA224_DIGEST_SIZE,
50e109b5 AKR	358	.init = sha224_init,
35d2c9d0	359	.update = crypto_sha256_update,
50e109b5	360	.final = sha224_final,
9b2fda7b	361	.descsize = sizeof(struct sha256_state),
50e109b5 AKR	362	.base = {
	363	.cra_name = "sha224",
	364	.cra_driver_name= "sha224-generic",
	365	.cra_flags = CRYPTO_ALG_TYPE_SHASH,
	366	.cra_blocksize = SHA224_BLOCK_SIZE,
	367	.cra_module = THIS_MODULE,
	368	}
6aeb49bc	369	} };
1da177e4	370
3af5b90b	371	static int __init sha256_generic_mod_init(void)
1da177e4	372	{
6aeb49bc	373	return crypto_register_shashes(sha256_algs, ARRAY_SIZE(sha256_algs));
1da177e4 LT	374	}
1da177e4 LT	375
3af5b90b	376	static void __exit sha256_generic_mod_fini(void)
1da177e4	377	{
6aeb49bc	378	crypto_unregister_shashes(sha256_algs, ARRAY_SIZE(sha256_algs));
1da177e4 LT	379	}
1da177e4 LT	380
3af5b90b KB	381	module_init(sha256_generic_mod_init);
3af5b90b KB	382	module_exit(sha256_generic_mod_fini);
1da177e4 LT	383
1da177e4 LT	384	MODULE_LICENSE("GPL");
cd12fb90	385	MODULE_DESCRIPTION("SHA-224 and SHA-256 Secure Hash Algorithm");
b3be9a6d	386
e635e0d5	387	MODULE_ALIAS_CRYPTO("sha224");
a659ea97	388	MODULE_ALIAS_CRYPTO("sha224-generic");
e635e0d5	389	MODULE_ALIAS_CRYPTO("sha256");
a659ea97	390	MODULE_ALIAS_CRYPTO("sha256-generic");