[linux.git] / crypto / sha512_generic.c

/* SHA-512 code by Jean-Luc Cooke <[email protected]>
 *
 * Copyright (c) Jean-Luc Cooke <[email protected]>
 * Copyright (c) Andrew McDonald <[email protected]>
 * Copyright (c) 2003 Kyle McMartin <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2, or (at your option) any
 * later version.
 *
 */
#include <crypto/internal/hash.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/crypto.h>
#include <linux/types.h>
#include <crypto/sha.h>
#include <linux/percpu.h>
#include <asm/byteorder.h>

static inline u64 Ch(u64 x, u64 y, u64 z)
{
        return z ^ (x & (y ^ z));
}

static inline u64 Maj(u64 x, u64 y, u64 z)
{
        return (x & y) | (z & (x | y));
}

static const u64 sha512_K[80] = {
        0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL,
        0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
        0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL,
        0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
        0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL,
        0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
        0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL,
        0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
        0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL,
        0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
        0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL,
        0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
        0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL,
        0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
        0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL,
        0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
        0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL,
        0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
        0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL,
        0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
        0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL,
        0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
        0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL,
        0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
        0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL,
        0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
        0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL,
};

#define e0(x)       (ror64(x,28) ^ ror64(x,34) ^ ror64(x,39))
#define e1(x)       (ror64(x,14) ^ ror64(x,18) ^ ror64(x,41))
#define s0(x)       (ror64(x, 1) ^ ror64(x, 8) ^ (x >> 7))
#define s1(x)       (ror64(x,19) ^ ror64(x,61) ^ (x >> 6))

static inline void LOAD_OP(int I, u64 *W, const u8 *input)
{
	W[I] = __be64_to_cpu( ((__be64*)(input))[I] );
}

static inline void BLEND_OP(int I, u64 *W)
{
	W[I & 15] += s1(W[(I-2) & 15]) + W[(I-7) & 15] + s0(W[(I-15) & 15]);
}

static void
sha512_transform(u64 *state, const u8 *input)
{
	u64 a, b, c, d, e, f, g, h, t1, t2;

	int i;
	u64 W[16];

	/* 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 */
	for (i=0; i<80; i+=8) {
		if (!(i & 8)) {
			int j;

			if (i < 16) {
				/* load the input */
				for (j = 0; j < 16; j++)
					LOAD_OP(i + j, W, input);
			} else {
				for (j = 0; j < 16; j++) {
					BLEND_OP(i + j, W);
				}
			}
		}

		t1 = h + e1(e) + Ch(e,f,g) + sha512_K[i  ] + W[(i & 15)];
		t2 = e0(a) + Maj(a,b,c);    d+=t1;    h=t1+t2;
		t1 = g + e1(d) + Ch(d,e,f) + sha512_K[i+1] + W[(i & 15) + 1];
		t2 = e0(h) + Maj(h,a,b);    c+=t1;    g=t1+t2;
		t1 = f + e1(c) + Ch(c,d,e) + sha512_K[i+2] + W[(i & 15) + 2];
		t2 = e0(g) + Maj(g,h,a);    b+=t1;    f=t1+t2;
		t1 = e + e1(b) + Ch(b,c,d) + sha512_K[i+3] + W[(i & 15) + 3];
		t2 = e0(f) + Maj(f,g,h);    a+=t1;    e=t1+t2;
		t1 = d + e1(a) + Ch(a,b,c) + sha512_K[i+4] + W[(i & 15) + 4];
		t2 = e0(e) + Maj(e,f,g);    h+=t1;    d=t1+t2;
		t1 = c + e1(h) + Ch(h,a,b) + sha512_K[i+5] + W[(i & 15) + 5];
		t2 = e0(d) + Maj(d,e,f);    g+=t1;    c=t1+t2;
		t1 = b + e1(g) + Ch(g,h,a) + sha512_K[i+6] + W[(i & 15) + 6];
		t2 = e0(c) + Maj(c,d,e);    f+=t1;    b=t1+t2;
		t1 = a + e1(f) + Ch(f,g,h) + sha512_K[i+7] + W[(i & 15) + 7];
		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;

	/* erase our data */
	a = b = c = d = e = f = g = h = t1 = t2 = 0;
}

static int
sha512_init(struct shash_desc *desc)
{
	struct sha512_state *sctx = shash_desc_ctx(desc);
	sctx->state[0] = SHA512_H0;
	sctx->state[1] = SHA512_H1;
	sctx->state[2] = SHA512_H2;
	sctx->state[3] = SHA512_H3;
	sctx->state[4] = SHA512_H4;
	sctx->state[5] = SHA512_H5;
	sctx->state[6] = SHA512_H6;
	sctx->state[7] = SHA512_H7;
	sctx->count[0] = sctx->count[1] = 0;

	return 0;
}

static int
sha384_init(struct shash_desc *desc)
{
	struct sha512_state *sctx = shash_desc_ctx(desc);
	sctx->state[0] = SHA384_H0;
	sctx->state[1] = SHA384_H1;
	sctx->state[2] = SHA384_H2;
	sctx->state[3] = SHA384_H3;
	sctx->state[4] = SHA384_H4;
	sctx->state[5] = SHA384_H5;
	sctx->state[6] = SHA384_H6;
	sctx->state[7] = SHA384_H7;
	sctx->count[0] = sctx->count[1] = 0;

	return 0;
}

int crypto_sha512_update(struct shash_desc *desc, const u8 *data,
			unsigned int len)
{
	struct sha512_state *sctx = shash_desc_ctx(desc);

	unsigned int i, index, part_len;

	/* Compute number of bytes mod 128 */
	index = sctx->count[0] & 0x7f;

	/* Update number of bytes */
	if ((sctx->count[0] += len) < len)
		sctx->count[1]++;

        part_len = 128 - index;

	/* Transform as many times as possible. */
	if (len >= part_len) {
		memcpy(&sctx->buf[index], data, part_len);
		sha512_transform(sctx->state, sctx->buf);

		for (i = part_len; i + 127 < len; i+=128)
			sha512_transform(sctx->state, &data[i]);

		index = 0;
	} else {
		i = 0;
	}

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

	return 0;
}
EXPORT_SYMBOL(crypto_sha512_update);

static int
sha512_final(struct shash_desc *desc, u8 *hash)
{
	struct sha512_state *sctx = shash_desc_ctx(desc);
        static u8 padding[128] = { 0x80, };
	__be64 *dst = (__be64 *)hash;
	__be64 bits[2];
	unsigned int index, pad_len;
	int i;

	/* Save number of bits */
	bits[1] = cpu_to_be64(sctx->count[0] << 3);
	bits[0] = cpu_to_be64(sctx->count[1] << 3 | sctx->count[0] >> 61);

	/* Pad out to 112 mod 128. */
	index = sctx->count[0] & 0x7f;
	pad_len = (index < 112) ? (112 - index) : ((128+112) - index);
	crypto_sha512_update(desc, padding, pad_len);

	/* Append length (before padding) */
	crypto_sha512_update(desc, (const u8 *)bits, sizeof(bits));

	/* Store state in digest */
	for (i = 0; i < 8; i++)
		dst[i] = cpu_to_be64(sctx->state[i]);

	/* Zeroize sensitive information. */
	memset(sctx, 0, sizeof(struct sha512_state));

	return 0;
}

static int sha384_final(struct shash_desc *desc, u8 *hash)
{
	u8 D[64];

	sha512_final(desc, D);

	memcpy(hash, D, 48);
	memset(D, 0, 64);

	return 0;
}

static struct shash_alg sha512_algs[2] = { {
	.digestsize	=	SHA512_DIGEST_SIZE,
	.init		=	sha512_init,
	.update		=	crypto_sha512_update,
	.final		=	sha512_final,
	.descsize	=	sizeof(struct sha512_state),
	.base		=	{
		.cra_name	=	"sha512",
		.cra_flags	=	CRYPTO_ALG_TYPE_SHASH,
		.cra_blocksize	=	SHA512_BLOCK_SIZE,
		.cra_module	=	THIS_MODULE,
	}
}, {
	.digestsize	=	SHA384_DIGEST_SIZE,
	.init		=	sha384_init,
	.update		=	crypto_sha512_update,
	.final		=	sha384_final,
	.descsize	=	sizeof(struct sha512_state),
	.base		=	{
		.cra_name	=	"sha384",
		.cra_flags	=	CRYPTO_ALG_TYPE_SHASH,
		.cra_blocksize	=	SHA384_BLOCK_SIZE,
		.cra_module	=	THIS_MODULE,
	}
} };

static int __init sha512_generic_mod_init(void)
{
	return crypto_register_shashes(sha512_algs, ARRAY_SIZE(sha512_algs));
}

static void __exit sha512_generic_mod_fini(void)
{
	crypto_unregister_shashes(sha512_algs, ARRAY_SIZE(sha512_algs));
}

module_init(sha512_generic_mod_init);
module_exit(sha512_generic_mod_fini);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SHA-512 and SHA-384 Secure Hash Algorithms");

MODULE_ALIAS("sha384");
MODULE_ALIAS("sha512");
Commit	Line	Data
1da177e4 LT	1	/* SHA-512 code by Jean-Luc Cooke <[email protected]>
	2	*
	3	* Copyright (c) Jean-Luc Cooke <[email protected]>
	4	* Copyright (c) Andrew McDonald <[email protected]>
	5	* Copyright (c) 2003 Kyle McMartin <[email protected]>
	6	*
	7	* This program is free software; you can redistribute it and/or modify it
	8	* under the terms of the GNU General Public License as published by the
	9	* Free Software Foundation; either version 2, or (at your option) any
	10	* later version.
	11	*
	12	*/
bd9d20db	13	#include <crypto/internal/hash.h>
1da177e4 LT	14	#include <linux/kernel.h>
1da177e4 LT	15	#include <linux/module.h>
1da177e4 LT	16	#include <linux/mm.h>
	17	#include <linux/init.h>
	18	#include <linux/crypto.h>
06ace7a9	19	#include <linux/types.h>
5265eeb2	20	#include <crypto/sha.h>
f9e2bca6	21	#include <linux/percpu.h>
1da177e4 LT	22	#include <asm/byteorder.h>
1da177e4 LT	23
1da177e4 LT	24	static inline u64 Ch(u64 x, u64 y, u64 z)
	25	{
	26	return z ^ (x & (y ^ z));
	27	}
	28
	29	static inline u64 Maj(u64 x, u64 y, u64 z)
	30	{
	31	return (x & y) \| (z & (x \| y));
	32	}
	33
1da177e4 LT	34	static const u64 sha512_K[80] = {
	35	0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL,
	36	0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
	37	0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL,
	38	0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
	39	0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL,
	40	0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
	41	0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL,
	42	0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
	43	0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL,
	44	0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
	45	0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL,
	46	0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
	47	0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL,
	48	0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
	49	0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL,
	50	0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
	51	0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL,
	52	0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
	53	0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL,
	54	0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
	55	0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL,
	56	0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
	57	0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL,
	58	0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
	59	0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL,
	60	0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
	61	0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL,
	62	};
	63
f2ea0f5f AD	64	#define e0(x) (ror64(x,28) ^ ror64(x,34) ^ ror64(x,39))
	65	#define e1(x) (ror64(x,14) ^ ror64(x,18) ^ ror64(x,41))
	66	#define s0(x) (ror64(x, 1) ^ ror64(x, 8) ^ (x >> 7))
	67	#define s1(x) (ror64(x,19) ^ ror64(x,61) ^ (x >> 6))
1da177e4	68
1da177e4 LT	69	static inline void LOAD_OP(int I, u64 W, const u8 input)
	70	{
	71	W[I] = __be64_to_cpu( ((__be64*)(input))[I] );
	72	}
	73
	74	static inline void BLEND_OP(int I, u64 *W)
	75	{
58d7d18b	76	W[I & 15] += s1(W[(I-2) & 15]) + W[(I-7) & 15] + s0(W[(I-15) & 15]);
1da177e4 LT	77	}
	78
	79	static void
f9e2bca6	80	sha512_transform(u64 state, const u8 input)
1da177e4 LT	81	{
	82	u64 a, b, c, d, e, f, g, h, t1, t2;
	83
	84	int i;
51fc6dc8	85	u64 W[16];
1da177e4	86
1da177e4	87	/* load the state into our registers */
78f8b3a2 JG	88	a=state[0]; b=state[1]; c=state[2]; d=state[3];
	89	e=state[4]; f=state[5]; g=state[6]; h=state[7];
	90
3a92d687 HX	91	/* now iterate */
	92	for (i=0; i<80; i+=8) {
	93	if (!(i & 8)) {
	94	int j;
	95
	96	if (i < 16) {
	97	/* load the input */
	98	for (j = 0; j < 16; j++)
	99	LOAD_OP(i + j, W, input);
	100	} else {
	101	for (j = 0; j < 16; j++) {
	102	BLEND_OP(i + j, W);
	103	}
	104	}
	105	}
	106
	107	t1 = h + e1(e) + Ch(e,f,g) + sha512_K[i ] + W[(i & 15)];
	108	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
	109	t1 = g + e1(d) + Ch(d,e,f) + sha512_K[i+1] + W[(i & 15) + 1];
	110	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
	111	t1 = f + e1(c) + Ch(c,d,e) + sha512_K[i+2] + W[(i & 15) + 2];
	112	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
	113	t1 = e + e1(b) + Ch(b,c,d) + sha512_K[i+3] + W[(i & 15) + 3];
	114	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
	115	t1 = d + e1(a) + Ch(a,b,c) + sha512_K[i+4] + W[(i & 15) + 4];
	116	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
	117	t1 = c + e1(h) + Ch(h,a,b) + sha512_K[i+5] + W[(i & 15) + 5];
	118	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
	119	t1 = b + e1(g) + Ch(g,h,a) + sha512_K[i+6] + W[(i & 15) + 6];
	120	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
	121	t1 = a + e1(f) + Ch(f,g,h) + sha512_K[i+7] + W[(i & 15) + 7];
	122	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
1da177e4	123	}
78f8b3a2 JG	124
	125	state[0] += a; state[1] += b; state[2] += c; state[3] += d;
	126	state[4] += e; state[5] += f; state[6] += g; state[7] += h;
1da177e4 LT	127
	128	/* erase our data */
	129	a = b = c = d = e = f = g = h = t1 = t2 = 0;
	130	}
	131
bd9d20db AKR	132	static int
bd9d20db AKR	133	sha512_init(struct shash_desc *desc)
1da177e4	134	{
1f38ad83	135	struct sha512_state *sctx = shash_desc_ctx(desc);
5265eeb2 JG	136	sctx->state[0] = SHA512_H0;
	137	sctx->state[1] = SHA512_H1;
	138	sctx->state[2] = SHA512_H2;
	139	sctx->state[3] = SHA512_H3;
	140	sctx->state[4] = SHA512_H4;
	141	sctx->state[5] = SHA512_H5;
	142	sctx->state[6] = SHA512_H6;
	143	sctx->state[7] = SHA512_H7;
13887ed6	144	sctx->count[0] = sctx->count[1] = 0;
bd9d20db AKR	145
bd9d20db AKR	146	return 0;
1da177e4 LT	147	}
1da177e4 LT	148
bd9d20db AKR	149	static int
bd9d20db AKR	150	sha384_init(struct shash_desc *desc)
1da177e4	151	{
1f38ad83	152	struct sha512_state *sctx = shash_desc_ctx(desc);
5265eeb2 JG	153	sctx->state[0] = SHA384_H0;
	154	sctx->state[1] = SHA384_H1;
	155	sctx->state[2] = SHA384_H2;
	156	sctx->state[3] = SHA384_H3;
	157	sctx->state[4] = SHA384_H4;
	158	sctx->state[5] = SHA384_H5;
	159	sctx->state[6] = SHA384_H6;
	160	sctx->state[7] = SHA384_H7;
13887ed6	161	sctx->count[0] = sctx->count[1] = 0;
bd9d20db AKR	162
bd9d20db AKR	163	return 0;
1da177e4 LT	164	}
1da177e4 LT	165
bf70fa9d TC	166	int crypto_sha512_update(struct shash_desc desc, const u8 data,
bf70fa9d TC	167	unsigned int len)
1da177e4	168	{
1f38ad83	169	struct sha512_state *sctx = shash_desc_ctx(desc);
1da177e4 LT	170
	171	unsigned int i, index, part_len;
	172
	173	/* Compute number of bytes mod 128 */
13887ed6 HX	174	index = sctx->count[0] & 0x7f;
	175
	176	/* Update number of bytes */
25c3d30c	177	if ((sctx->count[0] += len) < len)
13887ed6	178	sctx->count[1]++;
78f8b3a2	179
1da177e4	180	part_len = 128 - index;
78f8b3a2	181
1da177e4 LT	182	/* Transform as many times as possible. */
	183	if (len >= part_len) {
	184	memcpy(&sctx->buf[index], data, part_len);
f9e2bca6	185	sha512_transform(sctx->state, sctx->buf);
1da177e4 LT	186
1da177e4 LT	187	for (i = part_len; i + 127 < len; i+=128)
f9e2bca6	188	sha512_transform(sctx->state, &data[i]);
1da177e4 LT	189
	190	index = 0;
	191	} else {
	192	i = 0;
	193	}
	194
	195	/* Buffer remaining input */
	196	memcpy(&sctx->buf[index], &data[i], len - i);
bd9d20db AKR	197
bd9d20db AKR	198	return 0;
1da177e4	199	}
bf70fa9d	200	EXPORT_SYMBOL(crypto_sha512_update);
1da177e4	201
bd9d20db AKR	202	static int
bd9d20db AKR	203	sha512_final(struct shash_desc desc, u8 hash)
1da177e4	204	{
1f38ad83	205	struct sha512_state *sctx = shash_desc_ctx(desc);
1da177e4	206	static u8 padding[128] = { 0x80, };
06ace7a9	207	__be64 dst = (__be64 )hash;
13887ed6	208	__be64 bits[2];
1da177e4	209	unsigned int index, pad_len;
06ace7a9	210	int i;
1da177e4 LT	211
1da177e4 LT	212	/* Save number of bits */
13887ed6 HX	213	bits[1] = cpu_to_be64(sctx->count[0] << 3);
13887ed6 HX	214	bits[0] = cpu_to_be64(sctx->count[1] << 3 \| sctx->count[0] >> 61);
1da177e4 LT	215
1da177e4 LT	216	/* Pad out to 112 mod 128. */
13887ed6	217	index = sctx->count[0] & 0x7f;
1da177e4	218	pad_len = (index < 112) ? (112 - index) : ((128+112) - index);
bf70fa9d	219	crypto_sha512_update(desc, padding, pad_len);
1da177e4 LT	220
1da177e4 LT	221	/* Append length (before padding) */
bf70fa9d	222	crypto_sha512_update(desc, (const u8 *)bits, sizeof(bits));
1da177e4 LT	223
1da177e4 LT	224	/* Store state in digest */
06ace7a9 HX	225	for (i = 0; i < 8; i++)
	226	dst[i] = cpu_to_be64(sctx->state[i]);
	227
1da177e4	228	/* Zeroize sensitive information. */
1f38ad83	229	memset(sctx, 0, sizeof(struct sha512_state));
bd9d20db AKR	230
bd9d20db AKR	231	return 0;
1da177e4 LT	232	}
1da177e4 LT	233
bd9d20db	234	static int sha384_final(struct shash_desc desc, u8 hash)
1da177e4	235	{
bd9d20db	236	u8 D[64];
1da177e4	237
bd9d20db	238	sha512_final(desc, D);
1da177e4	239
bd9d20db AKR	240	memcpy(hash, D, 48);
	241	memset(D, 0, 64);
	242
	243	return 0;
1da177e4 LT	244	}
1da177e4 LT	245
648b2a10	246	static struct shash_alg sha512_algs[2] = { {
bd9d20db AKR	247	.digestsize = SHA512_DIGEST_SIZE,
bd9d20db AKR	248	.init = sha512_init,
bf70fa9d	249	.update = crypto_sha512_update,
bd9d20db	250	.final = sha512_final,
1f38ad83	251	.descsize = sizeof(struct sha512_state),
bd9d20db AKR	252	.base = {
	253	.cra_name = "sha512",
	254	.cra_flags = CRYPTO_ALG_TYPE_SHASH,
	255	.cra_blocksize = SHA512_BLOCK_SIZE,
	256	.cra_module = THIS_MODULE,
	257	}
648b2a10	258	}, {
bd9d20db AKR	259	.digestsize = SHA384_DIGEST_SIZE,
bd9d20db AKR	260	.init = sha384_init,
bf70fa9d	261	.update = crypto_sha512_update,
bd9d20db	262	.final = sha384_final,
1f38ad83	263	.descsize = sizeof(struct sha512_state),
bd9d20db AKR	264	.base = {
	265	.cra_name = "sha384",
	266	.cra_flags = CRYPTO_ALG_TYPE_SHASH,
	267	.cra_blocksize = SHA384_BLOCK_SIZE,
	268	.cra_module = THIS_MODULE,
	269	}
648b2a10	270	} };
1da177e4	271
3af5b90b	272	static int __init sha512_generic_mod_init(void)
1da177e4	273	{
648b2a10	274	return crypto_register_shashes(sha512_algs, ARRAY_SIZE(sha512_algs));
1da177e4 LT	275	}
1da177e4 LT	276
3af5b90b	277	static void __exit sha512_generic_mod_fini(void)
1da177e4	278	{
648b2a10	279	crypto_unregister_shashes(sha512_algs, ARRAY_SIZE(sha512_algs));
1da177e4 LT	280	}
1da177e4 LT	281
3af5b90b KB	282	module_init(sha512_generic_mod_init);
3af5b90b KB	283	module_exit(sha512_generic_mod_fini);
1da177e4 LT	284
	285	MODULE_LICENSE("GPL");
	286	MODULE_DESCRIPTION("SHA-512 and SHA-384 Secure Hash Algorithms");
78f8b3a2 JG	287
	288	MODULE_ALIAS("sha384");
	289	MODULE_ALIAS("sha512");