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/* 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 <string.h>
#include "../lib/bswap.h"
#include "sha512.h"
#define SHA384_DIGEST_SIZE 48
#define SHA512_DIGEST_SIZE 64
#define SHA384_HMAC_BLOCK_SIZE 128
#define SHA512_HMAC_BLOCK_SIZE 128
static inline uint64_t Ch(uint64_t x, uint64_t y, uint64_t z)
{
return z ^ (x & (y ^ z));
}
static inline uint64_t Maj(uint64_t x, uint64_t y, uint64_t z)
{
return (x & y) | (z & (x | y));
}
static inline uint64_t RORuint64_t(uint64_t x, uint64_t y)
{
return (x >> y) | (x << (64 - y));
}
static const uint64_t 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) (RORuint64_t(x,28) ^ RORuint64_t(x,34) ^ RORuint64_t(x,39))
#define e1(x) (RORuint64_t(x,14) ^ RORuint64_t(x,18) ^ RORuint64_t(x,41))
#define s0(x) (RORuint64_t(x, 1) ^ RORuint64_t(x, 8) ^ (x >> 7))
#define s1(x) (RORuint64_t(x,19) ^ RORuint64_t(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, uint64_t *W, const uint8_t *input)
{
W[I] = __be64_to_cpu( ((uint64_t *)(input))[I] );
}
static inline void BLEND_OP(int I, uint64_t *W)
{
W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16];
}
static void sha512_transform(uint64_t *state, uint64_t *W, const uint8_t *input)
{
uint64_t 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;
}
void fio_sha512_init(struct fio_sha512_ctx *sctx)
{
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;
}
void fio_sha512_update(struct fio_sha512_ctx *sctx, const uint8_t *data,
unsigned int len)
{
unsigned int i, idx, part_len;
/* Compute number of bytes mod 128 */
idx = (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 - idx;
/* Transform as many times as possible. */
if (len >= part_len) {
memcpy(&sctx->buf[idx], 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]);
idx = 0;
} else {
i = 0;
}
/* Buffer remaining input */
memcpy(&sctx->buf[idx], &data[i], len - i);
/* erase our data */
memset(sctx->W, 0, sizeof(sctx->W));
}
void fio_sha512_final(struct fio_sha512_ctx *sctx)
{
uint8_t *hash = sctx->buf;
static uint8_t padding[128] = { 0x80, };
unsigned int index, pad_len;
uint8_t bits[128];
uint64_t t2;
uint32_t t;
int i, j;
index = pad_len = t = i = j = 0;
t2 = 0;
/* Save number of bits */
t = sctx->count[0];
bits[15] = t; t>>=8;
bits[14] = t; t>>=8;
bits[13] = t; t>>=8;
bits[12] = t;
t = sctx->count[1];
bits[11] = t; t>>=8;
bits[10] = t; t>>=8;
bits[9 ] = t; t>>=8;
bits[8 ] = t;
t = sctx->count[2];
bits[7 ] = t; t>>=8;
bits[6 ] = t; t>>=8;
bits[5 ] = t; t>>=8;
bits[4 ] = t;
t = sctx->count[3];
bits[3 ] = t; t>>=8;
bits[2 ] = t; t>>=8;
bits[1 ] = t; t>>=8;
bits[0 ] = t;
/* Pad out to 112 mod 128. */
index = (sctx->count[0] >> 3) & 0x7f;
pad_len = (index < 112) ? (112 - index) : ((128+112) - index);
fio_sha512_update(sctx, padding, pad_len);
/* Append length (before padding) */
fio_sha512_update(sctx, bits, 16);
/* Store state in digest */
for (i = j = 0; i < 8; i++, j += 8) {
t2 = sctx->state[i];
hash[j+7] = (char)t2 & 0xff; t2>>=8;
hash[j+6] = (char)t2 & 0xff; t2>>=8;
hash[j+5] = (char)t2 & 0xff; t2>>=8;
hash[j+4] = (char)t2 & 0xff; t2>>=8;
hash[j+3] = (char)t2 & 0xff; t2>>=8;
hash[j+2] = (char)t2 & 0xff; t2>>=8;
hash[j+1] = (char)t2 & 0xff; t2>>=8;
hash[j ] = (char)t2 & 0xff;
}
}
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