[net-next-2.6.git] / crypto / sha512.c

/* SHA-512 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) 2003 Kyle McMartin <kyle@debian.org>
 *
 * 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 <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 <asm/byteorder.h>

struct sha512_ctx {
	u64 state[8];
	u32 count[4];
	u8 buf[128];
	u64 W[80];
};

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 inline u64 RORu64(u64 x, u64 y)
{
        return (x >> y) | (x << (64 - 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)       (RORu64(x,28) ^ RORu64(x,34) ^ RORu64(x,39))
#define e1(x)       (RORu64(x,14) ^ RORu64(x,18) ^ RORu64(x,41))
#define s0(x)       (RORu64(x, 1) ^ RORu64(x, 8) ^ (x >> 7))
#define s1(x)       (RORu64(x,19) ^ RORu64(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] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16];
}

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

	int i;

	/* load the input */
        for (i = 0; i < 16; i++)
                LOAD_OP(i, W, input);

        for (i = 16; i < 80; 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 */
	for (i=0; i<80; i+=8) {
		t1 = h + e1(e) + Ch(e,f,g) + sha512_K[i  ] + W[i  ];
		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+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+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+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+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+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+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+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 void
sha512_init(struct crypto_tfm *tfm)
{
	struct sha512_ctx *sctx = crypto_tfm_ctx(tfm);
	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] = sctx->count[2] = sctx->count[3] = 0;
}

static void
sha384_init(struct crypto_tfm *tfm)
{
	struct sha512_ctx *sctx = crypto_tfm_ctx(tfm);
	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] = sctx->count[2] = sctx->count[3] = 0;
}

static void
sha512_update(struct crypto_tfm *tfm, const u8 *data, unsigned int len)
{
	struct sha512_ctx *sctx = crypto_tfm_ctx(tfm);

	unsigned int i, index, part_len;

	/* Compute number of bytes mod 128 */
	index = (unsigned int)((sctx->count[0] >> 3) & 0x7F);
	
	/* Update number of bits */
	if ((sctx->count[0] += (len << 3)) < (len << 3)) {
		if ((sctx->count[1] += 1) < 1)
			if ((sctx->count[2] += 1) < 1)
				sctx->count[3]++;
		sctx->count[1] += (len >> 29);
	}
	
        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->W, sctx->buf);

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

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

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

	/* erase our data */
	memset(sctx->W, 0, sizeof(sctx->W));
}

static void
sha512_final(struct crypto_tfm *tfm, u8 *hash)
{
	struct sha512_ctx *sctx = crypto_tfm_ctx(tfm);
        static u8 padding[128] = { 0x80, };
	__be64 *dst = (__be64 *)hash;
	__be32 bits[4];
	unsigned int index, pad_len;
	int i;

	/* Save number of bits */
	bits[3] = cpu_to_be32(sctx->count[0]);
	bits[2] = cpu_to_be32(sctx->count[1]);
	bits[1] = cpu_to_be32(sctx->count[2]);
	bits[0] = cpu_to_be32(sctx->count[3]);

	/* Pad out to 112 mod 128. */
	index = (sctx->count[0] >> 3) & 0x7f;
	pad_len = (index < 112) ? (112 - index) : ((128+112) - index);
	sha512_update(tfm, padding, pad_len);

	/* Append length (before padding) */
	sha512_update(tfm, (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_ctx));
}

static void sha384_final(struct crypto_tfm *tfm, u8 *hash)
{
        u8 D[64];

	sha512_final(tfm, D);

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

static struct crypto_alg sha512 = {
        .cra_name       = "sha512",
        .cra_flags      = CRYPTO_ALG_TYPE_DIGEST,
	.cra_blocksize  = SHA512_BLOCK_SIZE,
        .cra_ctxsize    = sizeof(struct sha512_ctx),
        .cra_module     = THIS_MODULE,
	.cra_alignmask	= 3,
        .cra_list       = LIST_HEAD_INIT(sha512.cra_list),
        .cra_u          = { .digest = {
                                .dia_digestsize = SHA512_DIGEST_SIZE,
                                .dia_init       = sha512_init,
                                .dia_update     = sha512_update,
                                .dia_final      = sha512_final }
        }
};

static struct crypto_alg sha384 = {
        .cra_name       = "sha384",
        .cra_flags      = CRYPTO_ALG_TYPE_DIGEST,
	.cra_blocksize  = SHA384_BLOCK_SIZE,
        .cra_ctxsize    = sizeof(struct sha512_ctx),
	.cra_alignmask	= 3,
        .cra_module     = THIS_MODULE,
        .cra_list       = LIST_HEAD_INIT(sha384.cra_list),
        .cra_u          = { .digest = {
                                .dia_digestsize = SHA384_DIGEST_SIZE,
                                .dia_init       = sha384_init,
                                .dia_update     = sha512_update,
                                .dia_final      = sha384_final }
        }
};

MODULE_ALIAS("sha384");

static int __init init(void)
{
        int ret = 0;

        if ((ret = crypto_register_alg(&sha384)) < 0)
                goto out;
        if ((ret = crypto_register_alg(&sha512)) < 0)
                crypto_unregister_alg(&sha384);
out:
        return ret;
}

static void __exit fini(void)
{
        crypto_unregister_alg(&sha384);
        crypto_unregister_alg(&sha512);
}

module_init(init);
module_exit(fini);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SHA-512 and SHA-384 Secure Hash Algorithms");
Commit	Line	Data
1da177e4 LT	1	/* SHA-512 code by Jean-Luc Cooke <jlcooke@certainkey.com>
	2	*
	3	* Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
	4	* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
	5	* Copyright (c) 2003 Kyle McMartin <kyle@debian.org>
	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	*/
	13
	14	#include <linux/kernel.h>
	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>
1da177e4	21
1da177e4 LT	22	#include <asm/byteorder.h>
1da177e4 LT	23
1da177e4 LT	24	struct sha512_ctx {
	25	u64 state[8];
	26	u32 count[4];
	27	u8 buf[128];
	28	u64 W[80];
	29	};
	30
	31	static inline u64 Ch(u64 x, u64 y, u64 z)
	32	{
	33	return z ^ (x & (y ^ z));
	34	}
	35
	36	static inline u64 Maj(u64 x, u64 y, u64 z)
	37	{
	38	return (x & y) \| (z & (x \| y));
	39	}
	40
	41	static inline u64 RORu64(u64 x, u64 y)
	42	{
	43	return (x >> y) \| (x << (64 - y));
	44	}
	45
	46	static const u64 sha512_K[80] = {
	47	0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL,
	48	0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
	49	0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL,
	50	0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
	51	0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL,
	52	0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
	53	0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL,
	54	0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
	55	0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL,
	56	0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
	57	0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL,
	58	0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
	59	0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL,
	60	0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
	61	0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL,
	62	0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
	63	0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL,
	64	0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
	65	0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL,
	66	0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
	67	0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL,
	68	0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
	69	0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL,
	70	0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
	71	0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL,
	72	0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
	73	0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL,
	74	};
	75
	76	#define e0(x) (RORu64(x,28) ^ RORu64(x,34) ^ RORu64(x,39))
	77	#define e1(x) (RORu64(x,14) ^ RORu64(x,18) ^ RORu64(x,41))
	78	#define s0(x) (RORu64(x, 1) ^ RORu64(x, 8) ^ (x >> 7))
	79	#define s1(x) (RORu64(x,19) ^ RORu64(x,61) ^ (x >> 6))
	80
1da177e4 LT	81	static inline void LOAD_OP(int I, u64 W, const u8 input)
	82	{
	83	W[I] = __be64_to_cpu( ((__be64*)(input))[I] );
	84	}
	85
	86	static inline void BLEND_OP(int I, u64 *W)
	87	{
	88	W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16];
	89	}
	90
	91	static void
	92	sha512_transform(u64 state, u64 W, const u8 *input)
	93	{
	94	u64 a, b, c, d, e, f, g, h, t1, t2;
	95
	96	int i;
	97
	98	/* load the input */
	99	for (i = 0; i < 16; i++)
	100	LOAD_OP(i, W, input);
	101
	102	for (i = 16; i < 80; i++) {
	103	BLEND_OP(i, W);
	104	}
	105
	106	/* load the state into our registers */
	107	a=state[0]; b=state[1]; c=state[2]; d=state[3];
	108	e=state[4]; f=state[5]; g=state[6]; h=state[7];
	109
	110	/* now iterate */
	111	for (i=0; i<80; i+=8) {
	112	t1 = h + e1(e) + Ch(e,f,g) + sha512_K[i ] + W[i ];
	113	t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
	114	t1 = g + e1(d) + Ch(d,e,f) + sha512_K[i+1] + W[i+1];
	115	t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
	116	t1 = f + e1(c) + Ch(c,d,e) + sha512_K[i+2] + W[i+2];
	117	t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
	118	t1 = e + e1(b) + Ch(b,c,d) + sha512_K[i+3] + W[i+3];
	119	t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
	120	t1 = d + e1(a) + Ch(a,b,c) + sha512_K[i+4] + W[i+4];
	121	t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
	122	t1 = c + e1(h) + Ch(h,a,b) + sha512_K[i+5] + W[i+5];
	123	t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
	124	t1 = b + e1(g) + Ch(g,h,a) + sha512_K[i+6] + W[i+6];
	125	t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
	126	t1 = a + e1(f) + Ch(f,g,h) + sha512_K[i+7] + W[i+7];
	127	t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
	128	}
	129
	130	state[0] += a; state[1] += b; state[2] += c; state[3] += d;
	131	state[4] += e; state[5] += f; state[6] += g; state[7] += h;
	132
	133	/* erase our data */
	134	a = b = c = d = e = f = g = h = t1 = t2 = 0;
	135	}
	136
	137	static void
6c2bb98b	138	sha512_init(struct crypto_tfm *tfm)
1da177e4	139	{
6c2bb98b	140	struct sha512_ctx *sctx = crypto_tfm_ctx(tfm);
5265eeb2 JG	141	sctx->state[0] = SHA512_H0;
	142	sctx->state[1] = SHA512_H1;
	143	sctx->state[2] = SHA512_H2;
	144	sctx->state[3] = SHA512_H3;
	145	sctx->state[4] = SHA512_H4;
	146	sctx->state[5] = SHA512_H5;
	147	sctx->state[6] = SHA512_H6;
	148	sctx->state[7] = SHA512_H7;
1da177e4	149	sctx->count[0] = sctx->count[1] = sctx->count[2] = sctx->count[3] = 0;
1da177e4 LT	150	}
	151
	152	static void
6c2bb98b	153	sha384_init(struct crypto_tfm *tfm)
1da177e4	154	{
6c2bb98b	155	struct sha512_ctx *sctx = crypto_tfm_ctx(tfm);
5265eeb2 JG	156	sctx->state[0] = SHA384_H0;
	157	sctx->state[1] = SHA384_H1;
	158	sctx->state[2] = SHA384_H2;
	159	sctx->state[3] = SHA384_H3;
	160	sctx->state[4] = SHA384_H4;
	161	sctx->state[5] = SHA384_H5;
	162	sctx->state[6] = SHA384_H6;
	163	sctx->state[7] = SHA384_H7;
1da177e4	164	sctx->count[0] = sctx->count[1] = sctx->count[2] = sctx->count[3] = 0;
1da177e4 LT	165	}
	166
	167	static void
6c2bb98b	168	sha512_update(struct crypto_tfm tfm, const u8 data, unsigned int len)
1da177e4	169	{
6c2bb98b	170	struct sha512_ctx *sctx = crypto_tfm_ctx(tfm);
1da177e4 LT	171
	172	unsigned int i, index, part_len;
	173
	174	/* Compute number of bytes mod 128 */
	175	index = (unsigned int)((sctx->count[0] >> 3) & 0x7F);
	176
	177	/* Update number of bits */
	178	if ((sctx->count[0] += (len << 3)) < (len << 3)) {
	179	if ((sctx->count[1] += 1) < 1)
	180	if ((sctx->count[2] += 1) < 1)
	181	sctx->count[3]++;
	182	sctx->count[1] += (len >> 29);
	183	}
	184
	185	part_len = 128 - index;
	186
	187	/* Transform as many times as possible. */
	188	if (len >= part_len) {
	189	memcpy(&sctx->buf[index], data, part_len);
	190	sha512_transform(sctx->state, sctx->W, sctx->buf);
	191
	192	for (i = part_len; i + 127 < len; i+=128)
	193	sha512_transform(sctx->state, sctx->W, &data[i]);
	194
	195	index = 0;
	196	} else {
	197	i = 0;
	198	}
	199
	200	/* Buffer remaining input */
	201	memcpy(&sctx->buf[index], &data[i], len - i);
	202
	203	/* erase our data */
	204	memset(sctx->W, 0, sizeof(sctx->W));
	205	}
	206
	207	static void
6c2bb98b	208	sha512_final(struct crypto_tfm tfm, u8 hash)
1da177e4	209	{
6c2bb98b	210	struct sha512_ctx *sctx = crypto_tfm_ctx(tfm);
1da177e4	211	static u8 padding[128] = { 0x80, };
06ace7a9 HX	212	__be64 dst = (__be64 )hash;
06ace7a9 HX	213	__be32 bits[4];
1da177e4	214	unsigned int index, pad_len;
06ace7a9	215	int i;
1da177e4 LT	216
1da177e4 LT	217	/* Save number of bits */
06ace7a9 HX	218	bits[3] = cpu_to_be32(sctx->count[0]);
	219	bits[2] = cpu_to_be32(sctx->count[1]);
	220	bits[1] = cpu_to_be32(sctx->count[2]);
	221	bits[0] = cpu_to_be32(sctx->count[3]);
1da177e4 LT	222
	223	/* Pad out to 112 mod 128. */
	224	index = (sctx->count[0] >> 3) & 0x7f;
	225	pad_len = (index < 112) ? (112 - index) : ((128+112) - index);
6c2bb98b	226	sha512_update(tfm, padding, pad_len);
1da177e4 LT	227
1da177e4 LT	228	/* Append length (before padding) */
6c2bb98b	229	sha512_update(tfm, (const u8 *)bits, sizeof(bits));
1da177e4 LT	230
1da177e4 LT	231	/* Store state in digest */
06ace7a9 HX	232	for (i = 0; i < 8; i++)
	233	dst[i] = cpu_to_be64(sctx->state[i]);
	234
1da177e4 LT	235	/* Zeroize sensitive information. */
	236	memset(sctx, 0, sizeof(struct sha512_ctx));
	237	}
	238
6c2bb98b	239	static void sha384_final(struct crypto_tfm tfm, u8 hash)
1da177e4	240	{
1da177e4 LT	241	u8 D[64];
1da177e4 LT	242
6c2bb98b	243	sha512_final(tfm, D);
1da177e4 LT	244
	245	memcpy(hash, D, 48);
	246	memset(D, 0, 64);
	247	}
	248
	249	static struct crypto_alg sha512 = {
	250	.cra_name = "sha512",
	251	.cra_flags = CRYPTO_ALG_TYPE_DIGEST,
5265eeb2	252	.cra_blocksize = SHA512_BLOCK_SIZE,
1da177e4 LT	253	.cra_ctxsize = sizeof(struct sha512_ctx),
1da177e4 LT	254	.cra_module = THIS_MODULE,
e1147d8f	255	.cra_alignmask = 3,
1da177e4 LT	256	.cra_list = LIST_HEAD_INIT(sha512.cra_list),
	257	.cra_u = { .digest = {
	258	.dia_digestsize = SHA512_DIGEST_SIZE,
	259	.dia_init = sha512_init,
	260	.dia_update = sha512_update,
	261	.dia_final = sha512_final }
	262	}
	263	};
	264
	265	static struct crypto_alg sha384 = {
	266	.cra_name = "sha384",
	267	.cra_flags = CRYPTO_ALG_TYPE_DIGEST,
5265eeb2	268	.cra_blocksize = SHA384_BLOCK_SIZE,
1da177e4	269	.cra_ctxsize = sizeof(struct sha512_ctx),
e1147d8f	270	.cra_alignmask = 3,
1da177e4 LT	271	.cra_module = THIS_MODULE,
	272	.cra_list = LIST_HEAD_INIT(sha384.cra_list),
	273	.cra_u = { .digest = {
	274	.dia_digestsize = SHA384_DIGEST_SIZE,
	275	.dia_init = sha384_init,
	276	.dia_update = sha512_update,
	277	.dia_final = sha384_final }
	278	}
	279	};
	280
	281	MODULE_ALIAS("sha384");
	282
	283	static int __init init(void)
	284	{
	285	int ret = 0;
	286
	287	if ((ret = crypto_register_alg(&sha384)) < 0)
	288	goto out;
	289	if ((ret = crypto_register_alg(&sha512)) < 0)
	290	crypto_unregister_alg(&sha384);
	291	out:
	292	return ret;
	293	}
	294
	295	static void __exit fini(void)
	296	{
	297	crypto_unregister_alg(&sha384);
	298	crypto_unregister_alg(&sha512);
	299	}
	300
	301	module_init(init);
	302	module_exit(fini);
	303
	304	MODULE_LICENSE("GPL");
	305	MODULE_DESCRIPTION("SHA-512 and SHA-384 Secure Hash Algorithms");