/* 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 <asm/scatterlist.h>#include <asm/byteorder.h> #define SHA384_DIGEST_SIZE 48#define SHA512_DIGEST_SIZE 64#define SHA384_HMAC_BLOCK_SIZE  96#define SHA512_HMAC_BLOCK_SIZE 128 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)) /* H* initial state for SHA-512 */#define H0         0x6a09e667f3bcc908ULL#define H1         0xbb67ae8584caa73bULL#define H2         0x3c6ef372fe94f82bULL#define H3         0xa54ff53a5f1d36f1ULL#define H4         0x510e527fade682d1ULL#define H5         0x9b05688c2b3e6c1fULL#define H6         0x1f83d9abfb41bd6bULL#define H7         0x5be0cd19137e2179ULL /* H'* initial state for SHA-384 */#define HP0 0xcbbb9d5dc1059ed8ULL#define HP1 0x629a292a367cd507ULL#define HP2 0x9159015a3070dd17ULL#define HP3 0x152fecd8f70e5939ULL#define HP4 0x67332667ffc00b31ULL#define HP5 0x8eb44a8768581511ULL#define HP6 0xdb0c2e0d64f98fa7ULL#define HP7 0x47b5481dbefa4fa4ULL 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 voidsha512_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 voidsha512_init(void *ctx){        struct sha512_ctx *sctx = ctx;	sctx->state[0] = H0;	sctx->state[1] = H1;	sctx->state[2] = H2;	sctx->state[3] = H3;	sctx->state[4] = H4;	sctx->state[5] = H5;	sctx->state[6] = H6;	sctx->state[7] = H7;	sctx->count[0] = sctx->count[1] = sctx->count[2] = sctx->count[3] = 0;	memset(sctx->buf, 0, sizeof(sctx->buf));} static voidsha384_init(void *ctx){        struct sha512_ctx *sctx = ctx;        sctx->state[0] = HP0;        sctx->state[1] = HP1;        sctx->state[2] = HP2;        sctx->state[3] = HP3;        sctx->state[4] = HP4;        sctx->state[5] = HP5;        sctx->state[6] = HP6;        sctx->state[7] = HP7;        sctx->count[0] = sctx->count[1] = sctx->count[2] = sctx->count[3] = 0;        memset(sctx->buf, 0, sizeof(sctx->buf));} static voidsha512_update(void *ctx, const u8 *data, unsigned int len){        struct sha512_ctx *sctx = ctx; 	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 voidsha512_final(void *ctx, u8 *hash){        struct sha512_ctx *sctx = ctx;        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(sctx, padding, pad_len); 	/* Append length (before padding) */	sha512_update(sctx, (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(void *ctx, u8 *hash){        struct sha512_ctx *sctx = ctx;        u8 D[64];         sha512_final(sctx, 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_HMAC_BLOCK_SIZE,        .cra_ctxsize    = sizeof(struct sha512_ctx),        .cra_module     = THIS_MODULE,        .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_HMAC_BLOCK_SIZE,        .cra_ctxsize    = sizeof(struct sha512_ctx),        .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");