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neoscrypt.c
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neoscrypt.c
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/*
* Copyright (c) 2009 Colin Percival, 2011 ArtForz
* Copyright (c) 2012 Andrew Moon (floodyberry)
* Copyright (c) 2012 Samuel Neves <[email protected]>
* Copyright (c) 2014-2018 John Doering <[email protected]>
* 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 <stdlib.h>
#include <stdint.h>
#include <string.h>
#include "neoscrypt.h"
#ifdef NEOSCRYPT_SHA256
/* SHA-256 */
static const uint sha256_constants[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) (z ^ (x & (y ^ z)))
#define Maj(x,y,z) (((x | y) & z) | (x & y))
#define S0(x) (ROTR32(x, 2) ^ ROTR32(x, 13) ^ ROTR32(x, 22))
#define S1(x) (ROTR32(x, 6) ^ ROTR32(x, 11) ^ ROTR32(x, 25))
#define G0(x) (ROTR32(x, 7) ^ ROTR32(x, 18) ^ (x >> 3))
#define G1(x) (ROTR32(x, 17) ^ ROTR32(x, 19) ^ (x >> 10))
#define W0(in,i) (U8TO32_BE(&in[i * 4]))
#define W1(i) (G1(w[i - 2]) + w[i - 7] + G0(w[i - 15]) + w[i - 16])
#define STEP(i) \
t1 = S0(r[0]) + Maj(r[0], r[1], r[2]); \
t0 = r[7] + S1(r[4]) + Ch(r[4], r[5], r[6]) + sha256_constants[i] + w[i]; \
r[7] = r[6]; \
r[6] = r[5]; \
r[5] = r[4]; \
r[4] = r[3] + t0; \
r[3] = r[2]; \
r[2] = r[1]; \
r[1] = r[0]; \
r[0] = t0 + t1;
typedef struct sha256_hash_state_t {
uint H[8];
ullong T;
uint leftover;
uchar buffer[BLOCK_SIZE];
} sha256_hash_state;
static void sha256_blocks(sha256_hash_state *S, const uchar *in, uint blocks) {
uint r[8], w[64], t0, t1, i;
for(i = 0; i < 8; i++)
r[i] = S->H[i];
while(blocks--) {
for(i = 0; i < 16; i++) {
w[i] = W0(in, i);
}
for(i = 16; i < 64; i++) {
w[i] = W1(i);
}
for(i = 0; i < 64; i++) {
STEP(i);
}
for(i = 0; i < 8; i++) {
r[i] += S->H[i];
S->H[i] = r[i];
}
S->T += BLOCK_SIZE * 8;
in += BLOCK_SIZE;
}
}
static void neoscrypt_hash_init_sha256(sha256_hash_state *S) {
S->H[0] = 0x6A09E667;
S->H[1] = 0xBB67AE85;
S->H[2] = 0x3C6EF372;
S->H[3] = 0xA54FF53A;
S->H[4] = 0x510E527F;
S->H[5] = 0x9B05688C;
S->H[6] = 0x1F83D9AB;
S->H[7] = 0x5BE0CD19;
S->T = 0;
S->leftover = 0;
}
static void neoscrypt_hash_update_sha256(sha256_hash_state *S, const uchar *in, uint inlen) {
uint blocks, want;
/* handle the previous data */
if(S->leftover) {
want = (BLOCK_SIZE - S->leftover);
want = (want < inlen) ? want : inlen;
neoscrypt_copy(S->buffer + S->leftover, in, want);
S->leftover += (uint)want;
if(S->leftover < BLOCK_SIZE)
return;
in += want;
inlen -= want;
sha256_blocks(S, S->buffer, 1);
}
/* handle the current data */
blocks = (inlen & ~(BLOCK_SIZE - 1));
S->leftover = (uint)(inlen - blocks);
if(blocks) {
sha256_blocks(S, in, blocks / BLOCK_SIZE);
in += blocks;
}
/* handle leftover data */
if(S->leftover)
neoscrypt_copy(S->buffer, in, S->leftover);
}
static void neoscrypt_hash_finish_sha256(sha256_hash_state *S, uchar *hash) {
ullong t = S->T + (S->leftover * 8);
S->buffer[S->leftover] = 0x80;
if(S->leftover <= 55) {
neoscrypt_erase(S->buffer + S->leftover + 1, 55 - S->leftover);
} else {
neoscrypt_erase(S->buffer + S->leftover + 1, 63 - S->leftover);
sha256_blocks(S, S->buffer, 1);
neoscrypt_erase(S->buffer, 56);
}
U64TO8_BE(S->buffer + 56, t);
sha256_blocks(S, S->buffer, 1);
U32TO8_BE(&hash[ 0], S->H[0]);
U32TO8_BE(&hash[ 4], S->H[1]);
U32TO8_BE(&hash[ 8], S->H[2]);
U32TO8_BE(&hash[12], S->H[3]);
U32TO8_BE(&hash[16], S->H[4]);
U32TO8_BE(&hash[20], S->H[5]);
U32TO8_BE(&hash[24], S->H[6]);
U32TO8_BE(&hash[28], S->H[7]);
}
/* HMAC for SHA-256 */
typedef struct sha256_hmac_state_t {
sha256_hash_state inner, outer;
} sha256_hmac_state;
static inline void neoscrypt_hmac_init_sha256(sha256_hmac_state *st,
const uchar *key, uint keylen) {
uchar pad[BLOCK_SIZE + DIGEST_SIZE];
uint *P = (uint *) pad;
uint i;
/* The pad initialisation for the inner loop */
for(i = 0; i < (BLOCK_SIZE >> 2); i++)
P[i] = 0x36363636;
if(keylen <= BLOCK_SIZE) {
/* XOR the key into the pad */
neoscrypt_xor(pad, key, keylen);
} else {
/* Hash the key and XOR into the pad */
sha256_hash_state st0;
neoscrypt_hash_init_sha256(&st0);
neoscrypt_hash_update_sha256(&st0, key, keylen);
neoscrypt_hash_finish_sha256(&st0, &pad[BLOCK_SIZE]);
neoscrypt_xor(&pad[0], &pad[BLOCK_SIZE], DIGEST_SIZE);
}
neoscrypt_hash_init_sha256(&st->inner);
/* h(inner || pad) */
neoscrypt_hash_update_sha256(&st->inner, pad, BLOCK_SIZE);
/* The pad re-initialisation for the outer loop */
for(i = 0; i < (BLOCK_SIZE >> 2); i++)
P[i] ^= (0x36363636 ^ 0x5C5C5C5C);
neoscrypt_hash_init_sha256(&st->outer);
/* h(outer || pad) */
neoscrypt_hash_update_sha256(&st->outer, pad, BLOCK_SIZE);
}
static inline void neoscrypt_hmac_update_sha256(sha256_hmac_state *st,
const uchar *m, uint mlen) {
/* h(inner || m...) */
neoscrypt_hash_update_sha256(&st->inner, m, mlen);
}
static inline void neoscrypt_hmac_finish_sha256(sha256_hmac_state *st,
hash_digest mac) {
/* h(inner || m) */
hash_digest innerhash;
neoscrypt_hash_finish_sha256(&st->inner, innerhash);
/* h(outer || h(inner || m)) */
neoscrypt_hash_update_sha256(&st->outer, innerhash, sizeof(innerhash));
neoscrypt_hash_finish_sha256(&st->outer, mac);
}
/* PBKDF2 for SHA-256 */
void neoscrypt_pbkdf2_sha256(const uchar *password, uint password_len,
const uchar *salt, uint salt_len, uint N, uchar *output, uint output_len) {
sha256_hmac_state hmac_pw, hmac_pw_salt, work;
hash_digest ti, u;
uchar be[4];
uint i, j, k, blocks;
/* bytes must be <= (0xffffffff - (DIGEST_SIZE - 1)), which they will always be under scrypt */
/* hmac(password, ...) */
neoscrypt_hmac_init_sha256(&hmac_pw, password, password_len);
/* hmac(password, salt...) */
hmac_pw_salt = hmac_pw;
neoscrypt_hmac_update_sha256(&hmac_pw_salt, salt, salt_len);
blocks = ((uint)output_len + (DIGEST_SIZE - 1)) / DIGEST_SIZE;
for(i = 1; i <= blocks; i++) {
/* U1 = hmac(password, salt || be(i)) */
U32TO8_BE(be, i);
work = hmac_pw_salt;
neoscrypt_hmac_update_sha256(&work, be, 4);
neoscrypt_hmac_finish_sha256(&work, ti);
neoscrypt_copy(u, ti, sizeof(u));
/* T[i] = U1 ^ U2 ^ U3... */
for(j = 0; j < N - 1; j++) {
/* UX = hmac(password, U{X-1}) */
work = hmac_pw;
neoscrypt_hmac_update_sha256(&work, u, DIGEST_SIZE);
neoscrypt_hmac_finish_sha256(&work, u);
/* T[i] ^= UX */
for(k = 0; k < sizeof(u); k++)
ti[k] ^= u[k];
}
neoscrypt_copy(output, ti, (output_len > DIGEST_SIZE) ? DIGEST_SIZE : output_len);
output += DIGEST_SIZE;
output_len -= DIGEST_SIZE;
}
}
#endif /* NEOSCRYPT_SHA256 */
#ifdef NEOSCRYPT_BLAKE256
/* BLAKE-256 */
const uchar blake256_sigma[] = {
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3,
11, 8, 12, 0, 5, 2, 15, 13, 10, 14, 3, 6, 7, 1, 9, 4,
7, 9, 3, 1, 13, 12, 11, 14, 2, 6, 5, 10, 4, 0, 15, 8,
9, 0, 5, 7, 2, 4, 10, 15, 14, 1, 11, 12, 6, 8, 3, 13,
2, 12, 6, 10, 0, 11, 8, 3, 4, 13, 7, 5, 15, 14, 1, 9,
12, 5, 1, 15, 14, 13, 4, 10, 0, 7, 6, 3, 9, 2, 8, 11,
13, 11, 7, 14, 12, 1, 3, 9, 5, 0, 15, 4, 8, 6, 2, 10,
6, 15, 14, 9, 11, 3, 0, 8, 12, 2, 13, 7, 1, 4, 10, 5,
10, 2, 8, 4, 7, 6, 1, 5, 15, 11, 9, 14, 3, 12, 13, 0
};
const uint blake256_constants[16] = {
0x243F6A88, 0x85A308D3, 0x13198A2E, 0x03707344,
0xA4093822, 0x299F31D0, 0x082EFA98, 0xEC4E6C89,
0x452821E6, 0x38D01377, 0xBE5466CF, 0x34E90C6C,
0xC0AC29B7, 0xC97C50DD, 0x3F84D5B5, 0xB5470917
};
typedef struct blake256_hash_state_t {
uint H[8];
uint T[2];
uint leftover;
uchar buffer[BLOCK_SIZE];
} blake256_hash_state;
static void blake256_blocks(blake256_hash_state *S, const uchar *in, uint blocks) {
const uchar *sigma, *sigma_end = blake256_sigma + (10 * 16);
uint m[16], v[16], h[8], t[2];
uint i;
for(i = 0; i < 8; i++)
h[i] = S->H[i];
for(i = 0; i < 2; i++)
t[i] = S->T[i];
while(blocks--) {
t[0] += 512;
t[1] += (t[0] < 512) ? 1 : 0;
for(i = 0; i < 8; i++)
v[i] = h[i];
for(i = 0; i < 4; i++)
v[i + 8] = blake256_constants[i];
for(i = 0; i < 2; i++)
v[i + 12] = blake256_constants[i + 4] ^ t[0];
for(i = 0; i < 2; i++)
v[i + 14] = blake256_constants[i + 6] ^ t[1];
for(i = 0; i < 16; i++)
m[i] = U8TO32_BE(&in[i * 4]);
in += 64;
#define G(a, b, c, d, e) \
v[a] += (m[sigma[e + 0]] ^ blake256_constants[sigma[e + 1]]) + v[b]; \
v[d] = ROTR32(v[d] ^ v[a], 16); \
v[c] += v[d]; \
v[b] = ROTR32(v[b] ^ v[c], 12); \
v[a] += (m[sigma[e + 1]] ^ blake256_constants[sigma[e + 0]]) + v[b]; \
v[d] = ROTR32(v[d] ^ v[a], 8); \
v[c] += v[d]; \
v[b] = ROTR32(v[b] ^ v[c], 7);
for(i = 0, sigma = blake256_sigma; i < 14; i++) {
G( 0, 4, 8, 12, 0);
G( 1, 5, 9, 13, 2);
G( 2, 6, 10, 14, 4);
G( 3, 7, 11, 15, 6);
G( 0, 5, 10, 15, 8);
G( 1, 6, 11, 12, 10);
G( 2, 7, 8, 13, 12);
G( 3, 4, 9, 14, 14);
sigma += 16;
if(sigma == sigma_end)
sigma = blake256_sigma;
}
#undef G
for(i = 0; i < 8; i++)
h[i] ^= (v[i] ^ v[i + 8]);
}
for(i = 0; i < 8; i++)
S->H[i] = h[i];
for(i = 0; i < 2; i++)
S->T[i] = t[i];
}
static void neoscrypt_hash_init_blake256(blake256_hash_state *S) {
S->H[0] = 0x6a09e667ULL;
S->H[1] = 0xbb67ae85ULL;
S->H[2] = 0x3c6ef372ULL;
S->H[3] = 0xa54ff53aULL;
S->H[4] = 0x510e527fULL;
S->H[5] = 0x9b05688cULL;
S->H[6] = 0x1f83d9abULL;
S->H[7] = 0x5be0cd19ULL;
S->T[0] = 0;
S->T[1] = 0;
S->leftover = 0;
}
static void neoscrypt_hash_update_blake256(blake256_hash_state *S,
const uchar *in, uint inlen) {
uint blocks, want;
/* handle the previous data */
if(S->leftover) {
want = (BLOCK_SIZE - S->leftover);
want = (want < inlen) ? want : inlen;
neoscrypt_copy(S->buffer + S->leftover, in, want);
S->leftover += (uint)want;
if(S->leftover < BLOCK_SIZE)
return;
in += want;
inlen -= want;
blake256_blocks(S, S->buffer, 1);
}
/* handle the current data */
blocks = (inlen & ~(BLOCK_SIZE - 1));
S->leftover = (uint)(inlen - blocks);
if(blocks) {
blake256_blocks(S, in, blocks / BLOCK_SIZE);
in += blocks;
}
/* handle leftover data */
if(S->leftover)
neoscrypt_copy(S->buffer, in, S->leftover);
}
static void neoscrypt_hash_finish_blake256(blake256_hash_state *S, uchar *hash) {
uint th, tl, bits;
bits = (S->leftover << 3);
tl = S->T[0] + bits;
th = S->T[1];
if(S->leftover == 0) {
S->T[0] = (uint)0 - (uint)512;
S->T[1] = (uint)0 - (uint)1;
} else if(S->T[0] == 0) {
S->T[0] = ((uint)0 - (uint)512) + bits;
S->T[1] = S->T[1] - 1;
} else {
S->T[0] -= (512 - bits);
}
S->buffer[S->leftover] = 0x80;
if(S->leftover <= 55) {
neoscrypt_erase(S->buffer + S->leftover + 1, 55 - S->leftover);
} else {
neoscrypt_erase(S->buffer + S->leftover + 1, 63 - S->leftover);
blake256_blocks(S, S->buffer, 1);
S->T[0] = (uint)0 - (uint)512;
S->T[1] = (uint)0 - (uint)1;
neoscrypt_erase(S->buffer, 56);
}
S->buffer[55] |= 1;
U32TO8_BE(S->buffer + 56, th);
U32TO8_BE(S->buffer + 60, tl);
blake256_blocks(S, S->buffer, 1);
U32TO8_BE(&hash[ 0], S->H[0]);
U32TO8_BE(&hash[ 4], S->H[1]);
U32TO8_BE(&hash[ 8], S->H[2]);
U32TO8_BE(&hash[12], S->H[3]);
U32TO8_BE(&hash[16], S->H[4]);
U32TO8_BE(&hash[20], S->H[5]);
U32TO8_BE(&hash[24], S->H[6]);
U32TO8_BE(&hash[28], S->H[7]);
}
/* HMAC for BLAKE-256 */
typedef struct blake256_hmac_state_t {
blake256_hash_state inner;
blake256_hash_state outer;
} blake256_hmac_state;
static inline void neoscrypt_hmac_init_blake256(blake256_hmac_state *st,
const uchar *key, uint keylen) {
uchar pad[BLOCK_SIZE + DIGEST_SIZE];
uint *P = (uint *) pad;
uint i;
/* The pad initialisation for the inner loop */
for(i = 0; i < (BLOCK_SIZE >> 2); i++)
P[i] = 0x36363636;
if(keylen <= BLOCK_SIZE) {
/* XOR the key into the pad */
neoscrypt_xor(pad, key, keylen);
} else {
/* Hash the key and XOR into the pad */
blake256_hash_state st0;
neoscrypt_hash_init_blake256(&st0);
neoscrypt_hash_update_blake256(&st0, key, keylen);
neoscrypt_hash_finish_blake256(&st0, &pad[BLOCK_SIZE]);
neoscrypt_xor(&pad[0], &pad[BLOCK_SIZE], DIGEST_SIZE);
}
neoscrypt_hash_init_blake256(&st->inner);
/* h(inner || pad) */
neoscrypt_hash_update_blake256(&st->inner, pad, BLOCK_SIZE);
/* The pad re-initialisation for the outer loop */
for(i = 0; i < (BLOCK_SIZE >> 2); i++)
P[i] ^= (0x36363636 ^ 0x5C5C5C5C);
neoscrypt_hash_init_blake256(&st->outer);
/* h(outer || pad) */
neoscrypt_hash_update_blake256(&st->outer, pad, BLOCK_SIZE);
}
static inline void neoscrypt_hmac_update_blake256(blake256_hmac_state *st,
const uchar *m, uint mlen) {
/* h(inner || m...) */
neoscrypt_hash_update_blake256(&st->inner, m, mlen);
}
static inline void neoscrypt_hmac_finish_blake256(blake256_hmac_state *st,
hash_digest mac) {
/* h(inner || m) */
hash_digest innerhash;
neoscrypt_hash_finish_blake256(&st->inner, innerhash);
/* h(outer || h(inner || m)) */
neoscrypt_hash_update_blake256(&st->outer, innerhash, sizeof(innerhash));
neoscrypt_hash_finish_blake256(&st->outer, mac);
}
/* PBKDF2 for BLAKE-256 */
static void neoscrypt_pbkdf2_blake256(const uchar *password,
uint password_len, const uchar *salt, uint salt_len, uint N,
uchar *output, uint output_len) {
blake256_hmac_state hmac_pw, hmac_pw_salt, work;
hash_digest ti, u;
uchar be[4];
uint i, j, k, blocks;
/* bytes must be <= (0xffffffff - (DIGEST_SIZE - 1)), which they will always be under scrypt */
/* hmac(password, ...) */
neoscrypt_hmac_init_blake256(&hmac_pw, password, password_len);
/* hmac(password, salt...) */
hmac_pw_salt = hmac_pw;
neoscrypt_hmac_update_blake256(&hmac_pw_salt, salt, salt_len);
blocks = ((uint)output_len + (DIGEST_SIZE - 1)) / DIGEST_SIZE;
for(i = 1; i <= blocks; i++) {
/* U1 = hmac(password, salt || be(i)) */
U32TO8_BE(be, i);
work = hmac_pw_salt;
neoscrypt_hmac_update_blake256(&work, be, 4);
neoscrypt_hmac_finish_blake256(&work, ti);
neoscrypt_copy(u, ti, sizeof(u));
/* T[i] = U1 ^ U2 ^ U3... */
for(j = 0; j < N - 1; j++) {
/* UX = hmac(password, U{X-1}) */
work = hmac_pw;
neoscrypt_hmac_update_blake256(&work, u, DIGEST_SIZE);
neoscrypt_hmac_finish_blake256(&work, u);
/* T[i] ^= UX */
for(k = 0; k < sizeof(u); k++)
ti[k] ^= u[k];
}
neoscrypt_copy(output, ti, (output_len > DIGEST_SIZE) ? DIGEST_SIZE : output_len);
output += DIGEST_SIZE;
output_len -= DIGEST_SIZE;
}
}
#endif /* NEOSCRYPT_BLAKE256 */
/* NeoScrypt */
#ifdef NEOSCRYPT_ASM
extern void neoscrypt_copy(void *dstp, const void *srcp, uint len);
extern void neoscrypt_erase(void *dstp, uint len);
extern void neoscrypt_xor(void *dstp, const void *srcp, uint len);
#else
/* Salsa20, rounds must be a multiple of 2 */
static void neoscrypt_salsa(uint *X, uint rounds) {
uint x0, x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11, x12, x13, x14, x15, t;
x0 = X[0]; x1 = X[1]; x2 = X[2]; x3 = X[3];
x4 = X[4]; x5 = X[5]; x6 = X[6]; x7 = X[7];
x8 = X[8]; x9 = X[9]; x10 = X[10]; x11 = X[11];
x12 = X[12]; x13 = X[13]; x14 = X[14]; x15 = X[15];
#define quarter(a, b, c, d) \
t = a + d; t = ROTL32(t, 7); b ^= t; \
t = b + a; t = ROTL32(t, 9); c ^= t; \
t = c + b; t = ROTL32(t, 13); d ^= t; \
t = d + c; t = ROTL32(t, 18); a ^= t;
for(; rounds; rounds -= 2) {
quarter( x0, x4, x8, x12);
quarter( x5, x9, x13, x1);
quarter(x10, x14, x2, x6);
quarter(x15, x3, x7, x11);
quarter( x0, x1, x2, x3);
quarter( x5, x6, x7, x4);
quarter(x10, x11, x8, x9);
quarter(x15, x12, x13, x14);
}
X[0] += x0; X[1] += x1; X[2] += x2; X[3] += x3;
X[4] += x4; X[5] += x5; X[6] += x6; X[7] += x7;
X[8] += x8; X[9] += x9; X[10] += x10; X[11] += x11;
X[12] += x12; X[13] += x13; X[14] += x14; X[15] += x15;
#undef quarter
}
/* ChaCha20, rounds must be a multiple of 2 */
static void neoscrypt_chacha(uint *X, uint rounds) {
uint x0, x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11, x12, x13, x14, x15, t;
x0 = X[0]; x1 = X[1]; x2 = X[2]; x3 = X[3];
x4 = X[4]; x5 = X[5]; x6 = X[6]; x7 = X[7];
x8 = X[8]; x9 = X[9]; x10 = X[10]; x11 = X[11];
x12 = X[12]; x13 = X[13]; x14 = X[14]; x15 = X[15];
#define quarter(a,b,c,d) \
a += b; t = d ^ a; d = ROTL32(t, 16); \
c += d; t = b ^ c; b = ROTL32(t, 12); \
a += b; t = d ^ a; d = ROTL32(t, 8); \
c += d; t = b ^ c; b = ROTL32(t, 7);
for(; rounds; rounds -= 2) {
quarter( x0, x4, x8, x12);
quarter( x1, x5, x9, x13);
quarter( x2, x6, x10, x14);
quarter( x3, x7, x11, x15);
quarter( x0, x5, x10, x15);
quarter( x1, x6, x11, x12);
quarter( x2, x7, x8, x13);
quarter( x3, x4, x9, x14);
}
X[0] += x0; X[1] += x1; X[2] += x2; X[3] += x3;
X[4] += x4; X[5] += x5; X[6] += x6; X[7] += x7;
X[8] += x8; X[9] += x9; X[10] += x10; X[11] += x11;
X[12] += x12; X[13] += x13; X[14] += x14; X[15] += x15;
#undef quarter
}
/* Fast 32-bit / 64-bit memcpy();
* len must be a multiple of 32 bytes */
static void neoscrypt_blkcpy(void *dstp, const void *srcp, uint len) {
size_t *dst = (size_t *) dstp;
size_t *src = (size_t *) srcp;
uint i;
for(i = 0; i < (len / sizeof(size_t)); i += 4) {
dst[i] = src[i];
dst[i + 1] = src[i + 1];
dst[i + 2] = src[i + 2];
dst[i + 3] = src[i + 3];
}
}
/* Fast 32-bit / 64-bit block swapper;
* len must be a multiple of 32 bytes */
static void neoscrypt_blkswp(void *blkAp, void *blkBp, uint len) {
size_t *blkA = (size_t *) blkAp;
size_t *blkB = (size_t *) blkBp;
register size_t t0, t1, t2, t3;
uint i;
for(i = 0; i < (len / sizeof(size_t)); i += 4) {
t0 = blkA[i];
t1 = blkA[i + 1];
t2 = blkA[i + 2];
t3 = blkA[i + 3];
blkA[i] = blkB[i];
blkA[i + 1] = blkB[i + 1];
blkA[i + 2] = blkB[i + 2];
blkA[i + 3] = blkB[i + 3];
blkB[i] = t0;
blkB[i + 1] = t1;
blkB[i + 2] = t2;
blkB[i + 3] = t3;
}
}
/* Fast 32-bit / 64-bit block XOR engine;
* len must be a multiple of 32 bytes */
static void neoscrypt_blkxor(void *dstp, const void *srcp, uint len) {
size_t *dst = (size_t *) dstp;
size_t *src = (size_t *) srcp;
uint i;
for(i = 0; i < (len / sizeof(size_t)); i += 4) {
dst[i] ^= src[i];
dst[i + 1] ^= src[i + 1];
dst[i + 2] ^= src[i + 2];
dst[i + 3] ^= src[i + 3];
}
}
/* 32-bit / 64-bit optimised memcpy() */
void neoscrypt_copy(void *dstp, const void *srcp, uint len) {
size_t *dst = (size_t *) dstp;
size_t *src = (size_t *) srcp;
uint i, tail;
for(i = 0; i < (len / sizeof(size_t)); i++)
dst[i] = src[i];
tail = len & (sizeof(size_t) - 1);
if(tail) {
uchar *dstb = (uchar *) dstp;
uchar *srcb = (uchar *) srcp;
for(i = len - tail; i < len; i++)
dstb[i] = srcb[i];
}
}
/* 32-bit / 64-bit optimised memory erase aka memset() to zero */
void neoscrypt_erase(void *dstp, uint len) {
const size_t null = 0;
size_t *dst = (size_t *) dstp;
uint i, tail;
for(i = 0; i < (len / sizeof(size_t)); i++)
dst[i] = null;
tail = len & (sizeof(size_t) - 1);
if(tail) {
uchar *dstb = (uchar *) dstp;
for(i = len - tail; i < len; i++)
dstb[i] = (uchar)null;
}
}
/* Fail safe bytewise XOR engine */
void neoscrypt_xor(void *dstp, const void *srcp, uint len) {
uchar *dst = (uchar *) dstp;
uchar *src = (uchar *) srcp;
uint i;
for(i = 0; i < len; i++)
dst[i] ^= src[i];
}
#endif /* NEOSCRYPT_ASM */
/* BLAKE2s */
/* Parameter block of 32 bytes */
typedef struct blake2s_param_t {
uchar digest_length;
uchar key_length;
uchar fanout;
uchar depth;
uint leaf_length;
uchar node_offset[6];
uchar node_depth;
uchar inner_length;
uchar salt[8];
uchar personal[8];
} blake2s_param;
/* State block of 256 bytes */
typedef struct blake2s_state_t {
uint h[8];
uint t[2];
uint f[2];
uchar buf[2 * BLOCK_SIZE];
uint buflen;
uint padding[3];
uchar tempbuf[BLOCK_SIZE];
} blake2s_state;
static const uint blake2s_IV[8] = {
0x6A09E667, 0xBB67AE85, 0x3C6EF372, 0xA54FF53A,
0x510E527F, 0x9B05688C, 0x1F83D9AB, 0x5BE0CD19
};
#ifdef NEOSCRYPT_ASM
extern void blake2s_compress(blake2s_state *S);
#else
/* Buffer mixer (compressor) */
static void blake2s_compress(blake2s_state *S) {
uint *v = (uint *) S->tempbuf;
uint *m = (uint *) S->buf;
register uint t0, t1, t2, t3;
v[0] = S->h[0];
v[1] = S->h[1];
v[2] = S->h[2];
v[3] = S->h[3];
v[4] = S->h[4];
v[5] = S->h[5];
v[6] = S->h[6];
v[7] = S->h[7];
v[8] = blake2s_IV[0];
v[9] = blake2s_IV[1];
v[10] = blake2s_IV[2];
v[11] = blake2s_IV[3];
v[12] = S->t[0] ^ blake2s_IV[4];
v[13] = S->t[1] ^ blake2s_IV[5];
v[14] = S->f[0] ^ blake2s_IV[6];
v[15] = S->f[1] ^ blake2s_IV[7];
/* Round 0 */
t0 = v[0];
t1 = v[4];
t0 = t0 + t1 + m[0];
t3 = v[12];
t2 = v[8];
t3 = ROTR32(t3 ^ t0, 16);
t2 = t2 + t3;
t1 = ROTR32(t1 ^ t2, 12);
t0 = t0 + t1 + m[1];
v[0] = t0;
t3 = ROTR32(t3 ^ t0, 8);
v[12] = t3;
t2 = t2 + t3;
v[8] = t2;
t1 = ROTR32(t1 ^ t2, 7);
v[4] = t1;
t0 = v[1];
t1 = v[5];
t0 = t0 + t1 + m[2];
t3 = v[13];
t2 = v[9];
t3 = ROTR32(t3 ^ t0, 16);
t2 = t2 + t3;
t1 = ROTR32(t1 ^ t2, 12);
t0 = t0 + t1 + m[3];
v[1] = t0;
t3 = ROTR32(t3 ^ t0, 8);
v[13] = t3;
t2 = t2 + t3;
v[9] = t2;
t1 = ROTR32(t1 ^ t2, 7);
v[5] = t1;
t0 = v[2];
t1 = v[6];
t0 = t0 + t1 + m[4];
t3 = v[14];
t2 = v[10];
t3 = ROTR32(t3 ^ t0, 16);
t2 = t2 + t3;
t1 = ROTR32(t1 ^ t2, 12);
t0 = t0 + t1 + m[5];
v[2] = t0;
t3 = ROTR32(t3 ^ t0, 8);
v[14] = t3;
t2 = t2 + t3;
v[10] = t2;
t1 = ROTR32(t1 ^ t2, 7);
v[6] = t1;
t0 = v[3];
t1 = v[7];
t0 = t0 + t1 + m[6];
t3 = v[15];
t2 = v[11];
t3 = ROTR32(t3 ^ t0, 16);
t2 = t2 + t3;
t1 = ROTR32(t1 ^ t2, 12);
t0 = t0 + t1 + m[7];
v[3] = t0;
t3 = ROTR32(t3 ^ t0, 8);
v[15] = t3;
t2 = t2 + t3;
v[11] = t2;
t1 = ROTR32(t1 ^ t2, 7);
v[7] = t1;
t0 = v[0];
t1 = v[5];
t0 = t0 + t1 + m[8];
t3 = v[15];
t2 = v[10];
t3 = ROTR32(t3 ^ t0, 16);
t2 = t2 + t3;
t1 = ROTR32(t1 ^ t2, 12);
t0 = t0 + t1 + m[9];
v[0] = t0;
t3 = ROTR32(t3 ^ t0, 8);
v[15] = t3;
t2 = t2 + t3;
v[10] = t2;
t1 = ROTR32(t1 ^ t2, 7);
v[5] = t1;
t0 = v[1];
t1 = v[6];
t0 = t0 + t1 + m[10];
t3 = v[12];
t2 = v[11];
t3 = ROTR32(t3 ^ t0, 16);
t2 = t2 + t3;
t1 = ROTR32(t1 ^ t2, 12);
t0 = t0 + t1 + m[11];
v[1] = t0;
t3 = ROTR32(t3 ^ t0, 8);
v[12] = t3;
t2 = t2 + t3;
v[11] = t2;
t1 = ROTR32(t1 ^ t2, 7);
v[6] = t1;
t0 = v[2];
t1 = v[7];
t0 = t0 + t1 + m[12];
t3 = v[13];
t2 = v[8];
t3 = ROTR32(t3 ^ t0, 16);
t2 = t2 + t3;
t1 = ROTR32(t1 ^ t2, 12);
t0 = t0 + t1 + m[13];
v[2] = t0;
t3 = ROTR32(t3 ^ t0, 8);
v[13] = t3;
t2 = t2 + t3;
v[8] = t2;
t1 = ROTR32(t1 ^ t2, 7);
v[7] = t1;
t0 = v[3];
t1 = v[4];
t0 = t0 + t1 + m[14];
t3 = v[14];
t2 = v[9];
t3 = ROTR32(t3 ^ t0, 16);
t2 = t2 + t3;
t1 = ROTR32(t1 ^ t2, 12);
t0 = t0 + t1 + m[15];
v[3] = t0;
t3 = ROTR32(t3 ^ t0, 8);
v[14] = t3;
t2 = t2 + t3;
v[9] = t2;
t1 = ROTR32(t1 ^ t2, 7);
v[4] = t1;
/* Round 1 */
t0 = v[0];
t1 = v[4];
t0 = t0 + t1 + m[14];
t3 = v[12];
t2 = v[8];
t3 = ROTR32(t3 ^ t0, 16);
t2 = t2 + t3;
t1 = ROTR32(t1 ^ t2, 12);
t0 = t0 + t1 + m[10];
v[0] = t0;
t3 = ROTR32(t3 ^ t0, 8);
v[12] = t3;
t2 = t2 + t3;
v[8] = t2;
t1 = ROTR32(t1 ^ t2, 7);
v[4] = t1;
t0 = v[1];
t1 = v[5];
t0 = t0 + t1 + m[4];
t3 = v[13];
t2 = v[9];
t3 = ROTR32(t3 ^ t0, 16);
t2 = t2 + t3;
t1 = ROTR32(t1 ^ t2, 12);
t0 = t0 + t1 + m[8];
v[1] = t0;
t3 = ROTR32(t3 ^ t0, 8);
v[13] = t3;
t2 = t2 + t3;
v[9] = t2;
t1 = ROTR32(t1 ^ t2, 7);
v[5] = t1;
t0 = v[2];
t1 = v[6];
t0 = t0 + t1 + m[9];
t3 = v[14];
t2 = v[10];
t3 = ROTR32(t3 ^ t0, 16);
t2 = t2 + t3;
t1 = ROTR32(t1 ^ t2, 12);
t0 = t0 + t1 + m[15];
v[2] = t0;
t3 = ROTR32(t3 ^ t0, 8);
v[14] = t3;
t2 = t2 + t3;
v[10] = t2;