[mirror_ubuntu-hirsute-kernel.git] / lib / crypto / sha256.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * 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>
 * Copyright (c) 2014 Red Hat Inc.
 */

#include <linux/bitops.h>
#include <linux/export.h>
#include <linux/string.h>
#include <crypto/sha256.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));
}

int sha256_init(struct sha256_state *sctx)
{
	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;
}
EXPORT_SYMBOL(sha256_init);

int sha224_init(struct sha256_state *sctx)
{
	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;
}
EXPORT_SYMBOL(sha224_init);

int sha256_update(struct sha256_state *sctx, const u8 *data, unsigned int len)
{
	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(sha256_update);

int sha224_update(struct sha256_state *sctx, const u8 *data, unsigned int len)
{
	return sha256_update(sctx, data, len);
}
EXPORT_SYMBOL(sha224_update);

static int __sha256_final(struct sha256_state *sctx, u8 *out, int digest_words)
{
	__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);
	sha256_update(sctx, padding, pad_len);

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

	/* Store state in digest */
	for (i = 0; i < digest_words; i++)
		put_unaligned_be32(sctx->state[i], &dst[i]);

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

	return 0;
}

int sha256_final(struct sha256_state *sctx, u8 *out)
{
	return __sha256_final(sctx, out, 8);
}
EXPORT_SYMBOL(sha256_final);

int sha224_final(struct sha256_state *sctx, u8 *out)
{
	return __sha256_final(sctx, out, 7);
}
EXPORT_SYMBOL(sha224_final);
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
daeba064 VG	2	/*
	3	* SHA-256, as specified in
	4	* http://csrc.nist.gov/groups/STM/cavp/documents/shs/sha256-384-512.pdf
	5	*
	6	* SHA-256 code by Jean-Luc Cooke <jlcooke@certainkey.com>.
	7	*
	8	* Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
	9	* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
	10	* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
	11	* Copyright (c) 2014 Red Hat Inc.
daeba064 VG	12	*/
	13
	14	#include <linux/bitops.h>
01d3aee8	15	#include <linux/export.h>
df6f2801	16	#include <linux/string.h>
ad767ee8	17	#include <crypto/sha256.h>
906a4bb9	18	#include <asm/unaligned.h>
daeba064 VG	19
	20	static inline u32 Ch(u32 x, u32 y, u32 z)
	21	{
	22	return z ^ (x & (y ^ z));
	23	}
	24
	25	static inline u32 Maj(u32 x, u32 y, u32 z)
	26	{
	27	return (x & y) \| (z & (x \| y));
	28	}
	29
	30	#define e0(x) (ror32(x, 2) ^ ror32(x, 13) ^ ror32(x, 22))
	31	#define e1(x) (ror32(x, 6) ^ ror32(x, 11) ^ ror32(x, 25))
	32	#define s0(x) (ror32(x, 7) ^ ror32(x, 18) ^ (x >> 3))
	33	#define s1(x) (ror32(x, 17) ^ ror32(x, 19) ^ (x >> 10))
	34
	35	static inline void LOAD_OP(int I, u32 W, const u8 input)
	36	{
906a4bb9	37	W[I] = get_unaligned_be32((__u32 *)input + I);
daeba064 VG	38	}
	39
	40	static inline void BLEND_OP(int I, u32 *W)
	41	{
	42	W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16];
	43	}
	44
	45	static void sha256_transform(u32 state, const u8 input)
	46	{
	47	u32 a, b, c, d, e, f, g, h, t1, t2;
	48	u32 W[64];
	49	int i;
	50
	51	/* load the input */
	52	for (i = 0; i < 16; i++)
	53	LOAD_OP(i, W, input);
	54
	55	/* now blend */
	56	for (i = 16; i < 64; i++)
	57	BLEND_OP(i, W);
	58
	59	/* load the state into our registers */
	60	a = state[0]; b = state[1]; c = state[2]; d = state[3];
	61	e = state[4]; f = state[5]; g = state[6]; h = state[7];
	62
	63	/* now iterate */
	64	t1 = h + e1(e) + Ch(e, f, g) + 0x428a2f98 + W[0];
	65	t2 = e0(a) + Maj(a, b, c); d += t1; h = t1 + t2;
	66	t1 = g + e1(d) + Ch(d, e, f) + 0x71374491 + W[1];
	67	t2 = e0(h) + Maj(h, a, b); c += t1; g = t1 + t2;
	68	t1 = f + e1(c) + Ch(c, d, e) + 0xb5c0fbcf + W[2];
	69	t2 = e0(g) + Maj(g, h, a); b += t1; f = t1 + t2;
	70	t1 = e + e1(b) + Ch(b, c, d) + 0xe9b5dba5 + W[3];
	71	t2 = e0(f) + Maj(f, g, h); a += t1; e = t1 + t2;
	72	t1 = d + e1(a) + Ch(a, b, c) + 0x3956c25b + W[4];
	73	t2 = e0(e) + Maj(e, f, g); h += t1; d = t1 + t2;
	74	t1 = c + e1(h) + Ch(h, a, b) + 0x59f111f1 + W[5];
	75	t2 = e0(d) + Maj(d, e, f); g += t1; c = t1 + t2;
	76	t1 = b + e1(g) + Ch(g, h, a) + 0x923f82a4 + W[6];
	77	t2 = e0(c) + Maj(c, d, e); f += t1; b = t1 + t2;
	78	t1 = a + e1(f) + Ch(f, g, h) + 0xab1c5ed5 + W[7];
	79	t2 = e0(b) + Maj(b, c, d); e += t1; a = t1 + t2;
	80
	81	t1 = h + e1(e) + Ch(e, f, g) + 0xd807aa98 + W[8];
	82	t2 = e0(a) + Maj(a, b, c); d += t1; h = t1 + t2;
	83	t1 = g + e1(d) + Ch(d, e, f) + 0x12835b01 + W[9];
	84	t2 = e0(h) + Maj(h, a, b); c += t1; g = t1 + t2;
	85	t1 = f + e1(c) + Ch(c, d, e) + 0x243185be + W[10];
	86	t2 = e0(g) + Maj(g, h, a); b += t1; f = t1 + t2;
	87	t1 = e + e1(b) + Ch(b, c, d) + 0x550c7dc3 + W[11];
	88	t2 = e0(f) + Maj(f, g, h); a += t1; e = t1 + t2;
	89	t1 = d + e1(a) + Ch(a, b, c) + 0x72be5d74 + W[12];
	90	t2 = e0(e) + Maj(e, f, g); h += t1; d = t1 + t2;
	91	t1 = c + e1(h) + Ch(h, a, b) + 0x80deb1fe + W[13];
	92	t2 = e0(d) + Maj(d, e, f); g += t1; c = t1 + t2;
	93	t1 = b + e1(g) + Ch(g, h, a) + 0x9bdc06a7 + W[14];
	94	t2 = e0(c) + Maj(c, d, e); f += t1; b = t1 + t2;
	95	t1 = a + e1(f) + Ch(f, g, h) + 0xc19bf174 + W[15];
aca11119	96	t2 = e0(b) + Maj(b, c, d); e += t1; a = t1 + t2;
daeba064 VG	97
daeba064 VG	98	t1 = h + e1(e) + Ch(e, f, g) + 0xe49b69c1 + W[16];
aca11119	99	t2 = e0(a) + Maj(a, b, c); d += t1; h = t1 + t2;
daeba064	100	t1 = g + e1(d) + Ch(d, e, f) + 0xefbe4786 + W[17];
aca11119	101	t2 = e0(h) + Maj(h, a, b); c += t1; g = t1 + t2;
daeba064	102	t1 = f + e1(c) + Ch(c, d, e) + 0x0fc19dc6 + W[18];
aca11119	103	t2 = e0(g) + Maj(g, h, a); b += t1; f = t1 + t2;
daeba064	104	t1 = e + e1(b) + Ch(b, c, d) + 0x240ca1cc + W[19];
aca11119	105	t2 = e0(f) + Maj(f, g, h); a += t1; e = t1 + t2;
daeba064	106	t1 = d + e1(a) + Ch(a, b, c) + 0x2de92c6f + W[20];
aca11119	107	t2 = e0(e) + Maj(e, f, g); h += t1; d = t1 + t2;
daeba064	108	t1 = c + e1(h) + Ch(h, a, b) + 0x4a7484aa + W[21];
aca11119	109	t2 = e0(d) + Maj(d, e, f); g += t1; c = t1 + t2;
daeba064	110	t1 = b + e1(g) + Ch(g, h, a) + 0x5cb0a9dc + W[22];
aca11119	111	t2 = e0(c) + Maj(c, d, e); f += t1; b = t1 + t2;
daeba064	112	t1 = a + e1(f) + Ch(f, g, h) + 0x76f988da + W[23];
aca11119	113	t2 = e0(b) + Maj(b, c, d); e += t1; a = t1 + t2;
daeba064 VG	114
daeba064 VG	115	t1 = h + e1(e) + Ch(e, f, g) + 0x983e5152 + W[24];
aca11119	116	t2 = e0(a) + Maj(a, b, c); d += t1; h = t1 + t2;
daeba064	117	t1 = g + e1(d) + Ch(d, e, f) + 0xa831c66d + W[25];
aca11119	118	t2 = e0(h) + Maj(h, a, b); c += t1; g = t1 + t2;
daeba064	119	t1 = f + e1(c) + Ch(c, d, e) + 0xb00327c8 + W[26];
aca11119	120	t2 = e0(g) + Maj(g, h, a); b += t1; f = t1 + t2;
daeba064	121	t1 = e + e1(b) + Ch(b, c, d) + 0xbf597fc7 + W[27];
aca11119	122	t2 = e0(f) + Maj(f, g, h); a += t1; e = t1 + t2;
daeba064	123	t1 = d + e1(a) + Ch(a, b, c) + 0xc6e00bf3 + W[28];
aca11119	124	t2 = e0(e) + Maj(e, f, g); h += t1; d = t1 + t2;
daeba064	125	t1 = c + e1(h) + Ch(h, a, b) + 0xd5a79147 + W[29];
aca11119	126	t2 = e0(d) + Maj(d, e, f); g += t1; c = t1 + t2;
daeba064	127	t1 = b + e1(g) + Ch(g, h, a) + 0x06ca6351 + W[30];
aca11119	128	t2 = e0(c) + Maj(c, d, e); f += t1; b = t1 + t2;
daeba064	129	t1 = a + e1(f) + Ch(f, g, h) + 0x14292967 + W[31];
aca11119	130	t2 = e0(b) + Maj(b, c, d); e += t1; a = t1 + t2;
daeba064 VG	131
daeba064 VG	132	t1 = h + e1(e) + Ch(e, f, g) + 0x27b70a85 + W[32];
aca11119	133	t2 = e0(a) + Maj(a, b, c); d += t1; h = t1 + t2;
daeba064	134	t1 = g + e1(d) + Ch(d, e, f) + 0x2e1b2138 + W[33];
aca11119	135	t2 = e0(h) + Maj(h, a, b); c += t1; g = t1 + t2;
daeba064	136	t1 = f + e1(c) + Ch(c, d, e) + 0x4d2c6dfc + W[34];
aca11119	137	t2 = e0(g) + Maj(g, h, a); b += t1; f = t1 + t2;
daeba064	138	t1 = e + e1(b) + Ch(b, c, d) + 0x53380d13 + W[35];
aca11119	139	t2 = e0(f) + Maj(f, g, h); a += t1; e = t1 + t2;
daeba064	140	t1 = d + e1(a) + Ch(a, b, c) + 0x650a7354 + W[36];
aca11119	141	t2 = e0(e) + Maj(e, f, g); h += t1; d = t1 + t2;
daeba064	142	t1 = c + e1(h) + Ch(h, a, b) + 0x766a0abb + W[37];
aca11119	143	t2 = e0(d) + Maj(d, e, f); g += t1; c = t1 + t2;
daeba064	144	t1 = b + e1(g) + Ch(g, h, a) + 0x81c2c92e + W[38];
aca11119	145	t2 = e0(c) + Maj(c, d, e); f += t1; b = t1 + t2;
daeba064	146	t1 = a + e1(f) + Ch(f, g, h) + 0x92722c85 + W[39];
aca11119	147	t2 = e0(b) + Maj(b, c, d); e += t1; a = t1 + t2;
daeba064 VG	148
daeba064 VG	149	t1 = h + e1(e) + Ch(e, f, g) + 0xa2bfe8a1 + W[40];
aca11119	150	t2 = e0(a) + Maj(a, b, c); d += t1; h = t1 + t2;
daeba064	151	t1 = g + e1(d) + Ch(d, e, f) + 0xa81a664b + W[41];
aca11119	152	t2 = e0(h) + Maj(h, a, b); c += t1; g = t1 + t2;
daeba064	153	t1 = f + e1(c) + Ch(c, d, e) + 0xc24b8b70 + W[42];
aca11119	154	t2 = e0(g) + Maj(g, h, a); b += t1; f = t1 + t2;
daeba064	155	t1 = e + e1(b) + Ch(b, c, d) + 0xc76c51a3 + W[43];
aca11119	156	t2 = e0(f) + Maj(f, g, h); a += t1; e = t1 + t2;
daeba064	157	t1 = d + e1(a) + Ch(a, b, c) + 0xd192e819 + W[44];
aca11119	158	t2 = e0(e) + Maj(e, f, g); h += t1; d = t1 + t2;
daeba064	159	t1 = c + e1(h) + Ch(h, a, b) + 0xd6990624 + W[45];
aca11119	160	t2 = e0(d) + Maj(d, e, f); g += t1; c = t1 + t2;
daeba064	161	t1 = b + e1(g) + Ch(g, h, a) + 0xf40e3585 + W[46];
aca11119	162	t2 = e0(c) + Maj(c, d, e); f += t1; b = t1 + t2;
daeba064	163	t1 = a + e1(f) + Ch(f, g, h) + 0x106aa070 + W[47];
aca11119	164	t2 = e0(b) + Maj(b, c, d); e += t1; a = t1 + t2;
daeba064 VG	165
daeba064 VG	166	t1 = h + e1(e) + Ch(e, f, g) + 0x19a4c116 + W[48];
aca11119	167	t2 = e0(a) + Maj(a, b, c); d += t1; h = t1 + t2;
daeba064	168	t1 = g + e1(d) + Ch(d, e, f) + 0x1e376c08 + W[49];
aca11119	169	t2 = e0(h) + Maj(h, a, b); c += t1; g = t1 + t2;
daeba064	170	t1 = f + e1(c) + Ch(c, d, e) + 0x2748774c + W[50];
aca11119	171	t2 = e0(g) + Maj(g, h, a); b += t1; f = t1 + t2;
daeba064	172	t1 = e + e1(b) + Ch(b, c, d) + 0x34b0bcb5 + W[51];
aca11119	173	t2 = e0(f) + Maj(f, g, h); a += t1; e = t1 + t2;
daeba064	174	t1 = d + e1(a) + Ch(a, b, c) + 0x391c0cb3 + W[52];
aca11119	175	t2 = e0(e) + Maj(e, f, g); h += t1; d = t1 + t2;
daeba064	176	t1 = c + e1(h) + Ch(h, a, b) + 0x4ed8aa4a + W[53];
aca11119	177	t2 = e0(d) + Maj(d, e, f); g += t1; c = t1 + t2;
daeba064	178	t1 = b + e1(g) + Ch(g, h, a) + 0x5b9cca4f + W[54];
aca11119	179	t2 = e0(c) + Maj(c, d, e); f += t1; b = t1 + t2;
daeba064	180	t1 = a + e1(f) + Ch(f, g, h) + 0x682e6ff3 + W[55];
aca11119	181	t2 = e0(b) + Maj(b, c, d); e += t1; a = t1 + t2;
daeba064 VG	182
daeba064 VG	183	t1 = h + e1(e) + Ch(e, f, g) + 0x748f82ee + W[56];
aca11119	184	t2 = e0(a) + Maj(a, b, c); d += t1; h = t1 + t2;
daeba064	185	t1 = g + e1(d) + Ch(d, e, f) + 0x78a5636f + W[57];
aca11119	186	t2 = e0(h) + Maj(h, a, b); c += t1; g = t1 + t2;
daeba064	187	t1 = f + e1(c) + Ch(c, d, e) + 0x84c87814 + W[58];
aca11119	188	t2 = e0(g) + Maj(g, h, a); b += t1; f = t1 + t2;
daeba064	189	t1 = e + e1(b) + Ch(b, c, d) + 0x8cc70208 + W[59];
aca11119	190	t2 = e0(f) + Maj(f, g, h); a += t1; e = t1 + t2;
daeba064	191	t1 = d + e1(a) + Ch(a, b, c) + 0x90befffa + W[60];
aca11119	192	t2 = e0(e) + Maj(e, f, g); h += t1; d = t1 + t2;
daeba064	193	t1 = c + e1(h) + Ch(h, a, b) + 0xa4506ceb + W[61];
aca11119	194	t2 = e0(d) + Maj(d, e, f); g += t1; c = t1 + t2;
daeba064	195	t1 = b + e1(g) + Ch(g, h, a) + 0xbef9a3f7 + W[62];
aca11119	196	t2 = e0(c) + Maj(c, d, e); f += t1; b = t1 + t2;
daeba064	197	t1 = a + e1(f) + Ch(f, g, h) + 0xc67178f2 + W[63];
aca11119	198	t2 = e0(b) + Maj(b, c, d); e += t1; a = t1 + t2;
daeba064 VG	199
	200	state[0] += a; state[1] += b; state[2] += c; state[3] += d;
	201	state[4] += e; state[5] += f; state[6] += g; state[7] += h;
	202
	203	/* clear any sensitive info... */
	204	a = b = c = d = e = f = g = h = t1 = t2 = 0;
906a4bb9	205	memzero_explicit(W, 64 * sizeof(u32));
daeba064 VG	206	}
	207
	208	int sha256_init(struct sha256_state *sctx)
	209	{
	210	sctx->state[0] = SHA256_H0;
	211	sctx->state[1] = SHA256_H1;
	212	sctx->state[2] = SHA256_H2;
	213	sctx->state[3] = SHA256_H3;
	214	sctx->state[4] = SHA256_H4;
	215	sctx->state[5] = SHA256_H5;
	216	sctx->state[6] = SHA256_H6;
	217	sctx->state[7] = SHA256_H7;
	218	sctx->count = 0;
	219
	220	return 0;
	221	}
01d3aee8	222	EXPORT_SYMBOL(sha256_init);
daeba064	223
7d2f5b0c HG	224	int sha224_init(struct sha256_state *sctx)
	225	{
	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;
	235
	236	return 0;
	237	}
	238	EXPORT_SYMBOL(sha224_init);
	239
daeba064 VG	240	int sha256_update(struct sha256_state sctx, const u8 data, unsigned int len)
	241	{
	242	unsigned int partial, done;
	243	const u8 *src;
	244
	245	partial = sctx->count & 0x3f;
	246	sctx->count += len;
	247	done = 0;
	248	src = data;
	249
	250	if ((partial + len) > 63) {
	251	if (partial) {
	252	done = -partial;
	253	memcpy(sctx->buf + partial, data, done + 64);
	254	src = sctx->buf;
	255	}
	256
	257	do {
	258	sha256_transform(sctx->state, src);
	259	done += 64;
	260	src = data + done;
	261	} while (done + 63 < len);
	262
	263	partial = 0;
	264	}
	265	memcpy(sctx->buf + partial, src, len - done);
	266
	267	return 0;
	268	}
01d3aee8	269	EXPORT_SYMBOL(sha256_update);
daeba064	270
7d2f5b0c HG	271	int sha224_update(struct sha256_state sctx, const u8 data, unsigned int len)
	272	{
	273	return sha256_update(sctx, data, len);
	274	}
	275	EXPORT_SYMBOL(sha224_update);
	276
	277	static int __sha256_final(struct sha256_state sctx, u8 out, int digest_words)
daeba064 VG	278	{
	279	__be32 dst = (__be32 )out;
	280	__be64 bits;
	281	unsigned int index, pad_len;
	282	int i;
	283	static const u8 padding[64] = { 0x80, };
	284
	285	/* Save number of bits */
	286	bits = cpu_to_be64(sctx->count << 3);
	287
	288	/* Pad out to 56 mod 64. */
	289	index = sctx->count & 0x3f;
	290	pad_len = (index < 56) ? (56 - index) : ((64+56) - index);
	291	sha256_update(sctx, padding, pad_len);
	292
	293	/* Append length (before padding) */
	294	sha256_update(sctx, (const u8 *)&bits, sizeof(bits));
	295
	296	/* Store state in digest */
7d2f5b0c	297	for (i = 0; i < digest_words; i++)
906a4bb9	298	put_unaligned_be32(sctx->state[i], &dst[i]);
daeba064 VG	299
	300	/* Zeroize sensitive information. */
	301	memset(sctx, 0, sizeof(*sctx));
	302
	303	return 0;
	304	}
7d2f5b0c HG	305
	306	int sha256_final(struct sha256_state sctx, u8 out)
	307	{
	308	return __sha256_final(sctx, out, 8);
	309	}
01d3aee8	310	EXPORT_SYMBOL(sha256_final);
7d2f5b0c HG	311
	312	int sha224_final(struct sha256_state sctx, u8 out)
	313	{
	314	return __sha256_final(sctx, out, 7);
	315	}
	316	EXPORT_SYMBOL(sha224_final);