[thirdparty/kernel/stable.git] / crypto / sha256_generic.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * 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>
 */
#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>

const u8 sha224_zero_message_hash[SHA224_DIGEST_SIZE] = {
	0xd1, 0x4a, 0x02, 0x8c, 0x2a, 0x3a, 0x2b, 0xc9, 0x47,
	0x61, 0x02, 0xbb, 0x28, 0x82, 0x34, 0xc4, 0x15, 0xa2,
	0xb0, 0x1f, 0x82, 0x8e, 0xa6, 0x2a, 0xc5, 0xb3, 0xe4,
	0x2f
};
EXPORT_SYMBOL_GPL(sha224_zero_message_hash);

const u8 sha256_zero_message_hash[SHA256_DIGEST_SIZE] = {
	0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14,
	0x9a, 0xfb, 0xf4, 0xc8, 0x99, 0x6f, 0xb9, 0x24,
	0x27, 0xae, 0x41, 0xe4, 0x64, 0x9b, 0x93, 0x4c,
	0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8, 0x55
};
EXPORT_SYMBOL_GPL(sha256_zero_message_hash);

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_priority	=	100,
		.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_priority	=	100,
		.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));
}

subsys_initcall(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
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4 LT	2	/*
	3	* Cryptographic API.
	4	*
	5	* SHA-256, as specified in
8c882f64	6	* http://csrc.nist.gov/groups/STM/cavp/documents/shs/sha256-384-512.pdf
1da177e4 LT	7	*
	8	* SHA-256 code by Jean-Luc Cooke <jlcooke@certainkey.com>.
	9	*
	10	* Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
	11	* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
	12	* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
cd12fb90	13	* SHA224 Support Copyright 2007 Intel Corporation <jonathan.lynch@intel.com>
1da177e4	14	*/
50e109b5	15	#include <crypto/internal/hash.h>
1da177e4 LT	16	#include <linux/init.h>
	17	#include <linux/module.h>
	18	#include <linux/mm.h>
06ace7a9	19	#include <linux/types.h>
5265eeb2	20	#include <crypto/sha.h>
a2e5ba4f	21	#include <crypto/sha256_base.h>
1da177e4	22	#include <asm/byteorder.h>
be34c4ef	23	#include <asm/unaligned.h>
1da177e4	24
0c4c78de LC	25	const u8 sha224_zero_message_hash[SHA224_DIGEST_SIZE] = {
	26	0xd1, 0x4a, 0x02, 0x8c, 0x2a, 0x3a, 0x2b, 0xc9, 0x47,
	27	0x61, 0x02, 0xbb, 0x28, 0x82, 0x34, 0xc4, 0x15, 0xa2,
	28	0xb0, 0x1f, 0x82, 0x8e, 0xa6, 0x2a, 0xc5, 0xb3, 0xe4,
	29	0x2f
	30	};
	31	EXPORT_SYMBOL_GPL(sha224_zero_message_hash);
	32
	33	const u8 sha256_zero_message_hash[SHA256_DIGEST_SIZE] = {
	34	0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14,
	35	0x9a, 0xfb, 0xf4, 0xc8, 0x99, 0x6f, 0xb9, 0x24,
	36	0x27, 0xae, 0x41, 0xe4, 0x64, 0x9b, 0x93, 0x4c,
	37	0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8, 0x55
	38	};
	39	EXPORT_SYMBOL_GPL(sha256_zero_message_hash);
	40
1da177e4 LT	41	static inline u32 Ch(u32 x, u32 y, u32 z)
	42	{
	43	return z ^ (x & (y ^ z));
	44	}
	45
	46	static inline u32 Maj(u32 x, u32 y, u32 z)
	47	{
	48	return (x & y) \| (z & (x \| y));
	49	}
	50
	51	#define e0(x) (ror32(x, 2) ^ ror32(x,13) ^ ror32(x,22))
	52	#define e1(x) (ror32(x, 6) ^ ror32(x,11) ^ ror32(x,25))
	53	#define s0(x) (ror32(x, 7) ^ ror32(x,18) ^ (x >> 3))
	54	#define s1(x) (ror32(x,17) ^ ror32(x,19) ^ (x >> 10))
	55
1da177e4 LT	56	static inline void LOAD_OP(int I, u32 W, const u8 input)
1da177e4 LT	57	{
be34c4ef	58	W[I] = get_unaligned_be32((__u32 *)input + I);
1da177e4 LT	59	}
	60
	61	static inline void BLEND_OP(int I, u32 *W)
	62	{
	63	W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16];
	64	}
	65
	66	static void sha256_transform(u32 state, const u8 input)
	67	{
	68	u32 a, b, c, d, e, f, g, h, t1, t2;
	69	u32 W[64];
	70	int i;
	71
	72	/* load the input */
	73	for (i = 0; i < 16; i++)
	74	LOAD_OP(i, W, input);
	75
	76	/* now blend */
	77	for (i = 16; i < 64; i++)
	78	BLEND_OP(i, W);
50e109b5	79
1da177e4 LT	80	/* load the state into our registers */
	81	a=state[0]; b=state[1]; c=state[2]; d=state[3];
	82	e=state[4]; f=state[5]; g=state[6]; h=state[7];
	83
	84	/* now iterate */
	85	t1 = h + e1(e) + Ch(e,f,g) + 0x428a2f98 + W[ 0];
	86	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
	87	t1 = g + e1(d) + Ch(d,e,f) + 0x71374491 + W[ 1];
	88	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
	89	t1 = f + e1(c) + Ch(c,d,e) + 0xb5c0fbcf + W[ 2];
	90	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
	91	t1 = e + e1(b) + Ch(b,c,d) + 0xe9b5dba5 + W[ 3];
	92	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
	93	t1 = d + e1(a) + Ch(a,b,c) + 0x3956c25b + W[ 4];
	94	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
	95	t1 = c + e1(h) + Ch(h,a,b) + 0x59f111f1 + W[ 5];
	96	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
	97	t1 = b + e1(g) + Ch(g,h,a) + 0x923f82a4 + W[ 6];
	98	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
	99	t1 = a + e1(f) + Ch(f,g,h) + 0xab1c5ed5 + W[ 7];
	100	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
	101
	102	t1 = h + e1(e) + Ch(e,f,g) + 0xd807aa98 + W[ 8];
	103	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
	104	t1 = g + e1(d) + Ch(d,e,f) + 0x12835b01 + W[ 9];
	105	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
	106	t1 = f + e1(c) + Ch(c,d,e) + 0x243185be + W[10];
	107	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
	108	t1 = e + e1(b) + Ch(b,c,d) + 0x550c7dc3 + W[11];
	109	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
	110	t1 = d + e1(a) + Ch(a,b,c) + 0x72be5d74 + W[12];
	111	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
	112	t1 = c + e1(h) + Ch(h,a,b) + 0x80deb1fe + W[13];
	113	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
	114	t1 = b + e1(g) + Ch(g,h,a) + 0x9bdc06a7 + W[14];
	115	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
	116	t1 = a + e1(f) + Ch(f,g,h) + 0xc19bf174 + W[15];
	117	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
	118
	119	t1 = h + e1(e) + Ch(e,f,g) + 0xe49b69c1 + W[16];
	120	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
	121	t1 = g + e1(d) + Ch(d,e,f) + 0xefbe4786 + W[17];
	122	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
	123	t1 = f + e1(c) + Ch(c,d,e) + 0x0fc19dc6 + W[18];
	124	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
	125	t1 = e + e1(b) + Ch(b,c,d) + 0x240ca1cc + W[19];
	126	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
	127	t1 = d + e1(a) + Ch(a,b,c) + 0x2de92c6f + W[20];
	128	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
	129	t1 = c + e1(h) + Ch(h,a,b) + 0x4a7484aa + W[21];
	130	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
	131	t1 = b + e1(g) + Ch(g,h,a) + 0x5cb0a9dc + W[22];
	132	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
	133	t1 = a + e1(f) + Ch(f,g,h) + 0x76f988da + W[23];
	134	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
	135
	136	t1 = h + e1(e) + Ch(e,f,g) + 0x983e5152 + W[24];
	137	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
	138	t1 = g + e1(d) + Ch(d,e,f) + 0xa831c66d + W[25];
	139	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
	140	t1 = f + e1(c) + Ch(c,d,e) + 0xb00327c8 + W[26];
	141	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
	142	t1 = e + e1(b) + Ch(b,c,d) + 0xbf597fc7 + W[27];
	143	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
144	t1 = d + e1(a) + Ch(a,b,c) + 0xc6e00bf3 + W[28];
145	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
146	t1 = c + e1(h) + Ch(h,a,b) + 0xd5a79147 + W[29];
147	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
148	t1 = b + e1(g) + Ch(g,h,a) + 0x06ca6351 + W[30];
149	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
150	t1 = a + e1(f) + Ch(f,g,h) + 0x14292967 + W[31];
151	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
152
153	t1 = h + e1(e) + Ch(e,f,g) + 0x27b70a85 + W[32];
154	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
155	t1 = g + e1(d) + Ch(d,e,f) + 0x2e1b2138 + W[33];
156	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
157	t1 = f + e1(c) + Ch(c,d,e) + 0x4d2c6dfc + W[34];
158	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
159	t1 = e + e1(b) + Ch(b,c,d) + 0x53380d13 + W[35];
160	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
161	t1 = d + e1(a) + Ch(a,b,c) + 0x650a7354 + W[36];
162	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
163	t1 = c + e1(h) + Ch(h,a,b) + 0x766a0abb + W[37];
164	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
165	t1 = b + e1(g) + Ch(g,h,a) + 0x81c2c92e + W[38];
166	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
167	t1 = a + e1(f) + Ch(f,g,h) + 0x92722c85 + W[39];
168	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
169
170	t1 = h + e1(e) + Ch(e,f,g) + 0xa2bfe8a1 + W[40];
171	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
172	t1 = g + e1(d) + Ch(d,e,f) + 0xa81a664b + W[41];
173	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
174	t1 = f + e1(c) + Ch(c,d,e) + 0xc24b8b70 + W[42];
175	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
176	t1 = e + e1(b) + Ch(b,c,d) + 0xc76c51a3 + W[43];
177	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
178	t1 = d + e1(a) + Ch(a,b,c) + 0xd192e819 + W[44];
179	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
180	t1 = c + e1(h) + Ch(h,a,b) + 0xd6990624 + W[45];
181	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
182	t1 = b + e1(g) + Ch(g,h,a) + 0xf40e3585 + W[46];
183	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
184	t1 = a + e1(f) + Ch(f,g,h) + 0x106aa070 + W[47];
185	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
186
187	t1 = h + e1(e) + Ch(e,f,g) + 0x19a4c116 + W[48];
188	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
189	t1 = g + e1(d) + Ch(d,e,f) + 0x1e376c08 + W[49];
190	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
191	t1 = f + e1(c) + Ch(c,d,e) + 0x2748774c + W[50];
192	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
193	t1 = e + e1(b) + Ch(b,c,d) + 0x34b0bcb5 + W[51];
194	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
195	t1 = d + e1(a) + Ch(a,b,c) + 0x391c0cb3 + W[52];
196	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
197	t1 = c + e1(h) + Ch(h,a,b) + 0x4ed8aa4a + W[53];
198	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
199	t1 = b + e1(g) + Ch(g,h,a) + 0x5b9cca4f + W[54];
200	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
201	t1 = a + e1(f) + Ch(f,g,h) + 0x682e6ff3 + W[55];
202	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
203
204	t1 = h + e1(e) + Ch(e,f,g) + 0x748f82ee + W[56];
205	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
206	t1 = g + e1(d) + Ch(d,e,f) + 0x78a5636f + W[57];
207	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
208	t1 = f + e1(c) + Ch(c,d,e) + 0x84c87814 + W[58];
209	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
210	t1 = e + e1(b) + Ch(b,c,d) + 0x8cc70208 + W[59];
211	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
212	t1 = d + e1(a) + Ch(a,b,c) + 0x90befffa + W[60];
213	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
214	t1 = c + e1(h) + Ch(h,a,b) + 0xa4506ceb + W[61];
215	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
216	t1 = b + e1(g) + Ch(g,h,a) + 0xbef9a3f7 + W[62];
217	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
218	t1 = a + e1(f) + Ch(f,g,h) + 0xc67178f2 + W[63];
219	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
220
221	state[0] += a; state[1] += b; state[2] += c; state[3] += d;
222	state[4] += e; state[5] += f; state[6] += g; state[7] += h;
223
224	/* clear any sensitive info... */
225	a = b = c = d = e = f = g = h = t1 = t2 = 0;
7185ad26	226	memzero_explicit(W, 64 * sizeof(u32));
1da177e4 LT	227	}
1da177e4 LT	228
a2e5ba4f AB	229	static void sha256_generic_block_fn(struct sha256_state sst, u8 const src,
a2e5ba4f AB	230	int blocks)
cd12fb90	231	{
a2e5ba4f AB	232	while (blocks--) {
	233	sha256_transform(sst->state, src);
	234	src += SHA256_BLOCK_SIZE;
	235	}
1da177e4 LT	236	}
1da177e4 LT	237
35d2c9d0	238	int crypto_sha256_update(struct shash_desc desc, const u8 data,
6c2bb98b	239	unsigned int len)
1da177e4	240	{
a2e5ba4f	241	return sha256_base_do_update(desc, data, len, sha256_generic_block_fn);
1da177e4	242	}
35d2c9d0	243	EXPORT_SYMBOL(crypto_sha256_update);
1da177e4	244
50e109b5	245	static int sha256_final(struct shash_desc desc, u8 out)
1da177e4	246	{
a2e5ba4f AB	247	sha256_base_do_finalize(desc, sha256_generic_block_fn);
a2e5ba4f AB	248	return sha256_base_finish(desc, out);
1da177e4 LT	249	}
1da177e4 LT	250
a2e5ba4f AB	251	int crypto_sha256_finup(struct shash_desc desc, const u8 data,
a2e5ba4f AB	252	unsigned int len, u8 *hash)
cd12fb90	253	{
a2e5ba4f AB	254	sha256_base_do_update(desc, data, len, sha256_generic_block_fn);
a2e5ba4f AB	255	return sha256_final(desc, hash);
9b2fda7b	256	}
a2e5ba4f	257	EXPORT_SYMBOL(crypto_sha256_finup);
9b2fda7b	258
6aeb49bc	259	static struct shash_alg sha256_algs[2] = { {
50e109b5	260	.digestsize = SHA256_DIGEST_SIZE,
a2e5ba4f	261	.init = sha256_base_init,
35d2c9d0	262	.update = crypto_sha256_update,
50e109b5	263	.final = sha256_final,
a2e5ba4f	264	.finup = crypto_sha256_finup,
9b2fda7b	265	.descsize = sizeof(struct sha256_state),
50e109b5 AKR	266	.base = {
	267	.cra_name = "sha256",
	268	.cra_driver_name= "sha256-generic",
b73b7ac0	269	.cra_priority = 100,
50e109b5 AKR	270	.cra_blocksize = SHA256_BLOCK_SIZE,
	271	.cra_module = THIS_MODULE,
	272	}
6aeb49bc	273	}, {
50e109b5	274	.digestsize = SHA224_DIGEST_SIZE,
a2e5ba4f	275	.init = sha224_base_init,
35d2c9d0	276	.update = crypto_sha256_update,
a2e5ba4f AB	277	.final = sha256_final,
a2e5ba4f AB	278	.finup = crypto_sha256_finup,
9b2fda7b	279	.descsize = sizeof(struct sha256_state),
50e109b5 AKR	280	.base = {
	281	.cra_name = "sha224",
	282	.cra_driver_name= "sha224-generic",
b73b7ac0	283	.cra_priority = 100,
50e109b5 AKR	284	.cra_blocksize = SHA224_BLOCK_SIZE,
	285	.cra_module = THIS_MODULE,
	286	}
6aeb49bc	287	} };
1da177e4	288
3af5b90b	289	static int __init sha256_generic_mod_init(void)
1da177e4	290	{
6aeb49bc	291	return crypto_register_shashes(sha256_algs, ARRAY_SIZE(sha256_algs));
1da177e4 LT	292	}
1da177e4 LT	293
3af5b90b	294	static void __exit sha256_generic_mod_fini(void)
1da177e4	295	{
6aeb49bc	296	crypto_unregister_shashes(sha256_algs, ARRAY_SIZE(sha256_algs));
1da177e4 LT	297	}
1da177e4 LT	298
c4741b23	299	subsys_initcall(sha256_generic_mod_init);
3af5b90b	300	module_exit(sha256_generic_mod_fini);
1da177e4 LT	301
1da177e4 LT	302	MODULE_LICENSE("GPL");
cd12fb90	303	MODULE_DESCRIPTION("SHA-224 and SHA-256 Secure Hash Algorithm");
b3be9a6d	304
5d26a105	305	MODULE_ALIAS_CRYPTO("sha224");
3e14dcf7	306	MODULE_ALIAS_CRYPTO("sha224-generic");
5d26a105	307	MODULE_ALIAS_CRYPTO("sha256");
3e14dcf7	308	MODULE_ALIAS_CRYPTO("sha256-generic");