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