build/libraries/libsodium/src/libsodium/crypto_hash/sha256/cp/hash_sha256_cp.c
/*-
* Copyright 2005,2007,2009 Colin Percival
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <limits.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include "crypto_hash_sha256.h"
#include "private/common.h"
#include "utils.h"
static void
be32enc_vect(unsigned char *dst, const uint32_t *src, size_t len)
{
size_t i;
for (i = 0; i < len / 4; i++) {
STORE32_BE(dst + i * 4, src[i]);
}
}
static void
be32dec_vect(uint32_t *dst, const unsigned char *src, size_t len)
{
size_t i;
for (i = 0; i < len / 4; i++) {
dst[i] = LOAD32_BE(src + i * 4);
}
}
static const uint32_t Krnd[64] = {
0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1,
0x923f82a4, 0xab1c5ed5, 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, 0xe49b69c1, 0xefbe4786,
0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147,
0x06ca6351, 0x14292967, 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, 0xa2bfe8a1, 0xa81a664b,
0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a,
0x5b9cca4f, 0x682e6ff3, 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
};
#define Ch(x, y, z) ((x & (y ^ z)) ^ z)
#define Maj(x, y, z) ((x & (y | z)) | (y & z))
#define SHR(x, n) (x >> n)
#define ROTR(x, n) ROTR32(x, n)
#define S0(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22))
#define S1(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25))
#define s0(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ SHR(x, 3))
#define s1(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ SHR(x, 10))
#define RND(a, b, c, d, e, f, g, h, k) \
h += S1(e) + Ch(e, f, g) + k; \
d += h; \
h += S0(a) + Maj(a, b, c);
#define RNDr(S, W, i, ii) \
RND(S[(64 - i) % 8], S[(65 - i) % 8], S[(66 - i) % 8], S[(67 - i) % 8], \
S[(68 - i) % 8], S[(69 - i) % 8], S[(70 - i) % 8], S[(71 - i) % 8], \
W[i + ii] + Krnd[i + ii])
#define MSCH(W, ii, i) \
W[i + ii + 16] = \
s1(W[i + ii + 14]) + W[i + ii + 9] + s0(W[i + ii + 1]) + W[i + ii]
static void
SHA256_Transform(uint32_t state[8], const uint8_t block[64], uint32_t W[64],
uint32_t S[8])
{
int i;
be32dec_vect(W, block, 64);
memcpy(S, state, 32);
for (i = 0; i < 64; i += 16) {
RNDr(S, W, 0, i);
RNDr(S, W, 1, i);
RNDr(S, W, 2, i);
RNDr(S, W, 3, i);
RNDr(S, W, 4, i);
RNDr(S, W, 5, i);
RNDr(S, W, 6, i);
RNDr(S, W, 7, i);
RNDr(S, W, 8, i);
RNDr(S, W, 9, i);
RNDr(S, W, 10, i);
RNDr(S, W, 11, i);
RNDr(S, W, 12, i);
RNDr(S, W, 13, i);
RNDr(S, W, 14, i);
RNDr(S, W, 15, i);
if (i == 48) {
break;
}
MSCH(W, 0, i);
MSCH(W, 1, i);
MSCH(W, 2, i);
MSCH(W, 3, i);
MSCH(W, 4, i);
MSCH(W, 5, i);
MSCH(W, 6, i);
MSCH(W, 7, i);
MSCH(W, 8, i);
MSCH(W, 9, i);
MSCH(W, 10, i);
MSCH(W, 11, i);
MSCH(W, 12, i);
MSCH(W, 13, i);
MSCH(W, 14, i);
MSCH(W, 15, i);
}
for (i = 0; i < 8; i++) {
state[i] += S[i];
}
}
static const uint8_t PAD[64] = { 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
static void
SHA256_Pad(crypto_hash_sha256_state *state, uint32_t tmp32[64 + 8])
{
uint64_t r;
uint64_t i;
r = (state->count >> 3) & 0x3f;
if (r < 56) {
for (i = 0; i < 56 - r; i++) {
state->buf[r + i] = PAD[i];
}
} else {
for (i = 0; i < 64 - r; i++) {
state->buf[r + i] = PAD[i];
}
SHA256_Transform(state->state, state->buf, &tmp32[0], &tmp32[64]);
memset(&state->buf[0], 0, 56);
}
STORE64_BE(&state->buf[56], state->count);
SHA256_Transform(state->state, state->buf, &tmp32[0], &tmp32[64]);
}
int
crypto_hash_sha256_init(crypto_hash_sha256_state *state)
{
static const uint32_t sha256_initial_state[8] = { 0x6a09e667, 0xbb67ae85,
0x3c6ef372, 0xa54ff53a,
0x510e527f, 0x9b05688c,
0x1f83d9ab, 0x5be0cd19 };
state->count = (uint64_t) 0U;
memcpy(state->state, sha256_initial_state, sizeof sha256_initial_state);
return 0;
}
int
crypto_hash_sha256_update(crypto_hash_sha256_state *state,
const unsigned char *in, unsigned long long inlen)
{
uint32_t tmp32[64 + 8];
unsigned long long i;
unsigned long long r;
if (inlen <= 0U) {
return 0;
}
r = (unsigned long long) ((state->count >> 3) & 0x3f);
state->count += ((uint64_t) inlen) << 3;
if (inlen < 64 - r) {
for (i = 0; i < inlen; i++) {
state->buf[r + i] = in[i];
}
return 0;
}
for (i = 0; i < 64 - r; i++) {
state->buf[r + i] = in[i];
}
SHA256_Transform(state->state, state->buf, &tmp32[0], &tmp32[64]);
in += 64 - r;
inlen -= 64 - r;
while (inlen >= 64) {
SHA256_Transform(state->state, in, &tmp32[0], &tmp32[64]);
in += 64;
inlen -= 64;
}
inlen &= 63;
for (i = 0; i < inlen; i++) {
state->buf[i] = in[i];
}
sodium_memzero((void *) tmp32, sizeof tmp32);
return 0;
}
int
crypto_hash_sha256_final(crypto_hash_sha256_state *state, unsigned char *out)
{
uint32_t tmp32[64 + 8];
SHA256_Pad(state, tmp32);
be32enc_vect(out, state->state, 32);
sodium_memzero((void *) tmp32, sizeof tmp32);
sodium_memzero((void *) state, sizeof *state);
return 0;
}
int
crypto_hash_sha256(unsigned char *out, const unsigned char *in,
unsigned long long inlen)
{
crypto_hash_sha256_state state;
crypto_hash_sha256_init(&state);
crypto_hash_sha256_update(&state, in, inlen);
crypto_hash_sha256_final(&state, out);
return 0;
}