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391 lines
12 KiB
391 lines
12 KiB
/*
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* Argon2 reference source code package - reference C implementations
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*
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* Copyright 2015
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* Daniel Dinu, Dmitry Khovratovich, Jean-Philippe Aumasson, and Samuel Neves
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*
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* You may use this work under the terms of a Creative Commons CC0 1.0
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* License/Waiver or the Apache Public License 2.0, at your option. The terms of
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* these licenses can be found at:
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*
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* - CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0
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* - Apache 2.0 : http://www.apache.org/licenses/LICENSE-2.0
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*
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* You should have received a copy of both of these licenses along with this
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* software. If not, they may be obtained at the above URLs.
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*/
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#include <stdint.h>
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#include <string.h>
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#include <stdio.h>
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#include "blake2.h"
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#include "blake2-impl.h"
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static const uint64_t blake2b_IV[8] = {
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UINT64_C(0x6a09e667f3bcc908), UINT64_C(0xbb67ae8584caa73b),
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UINT64_C(0x3c6ef372fe94f82b), UINT64_C(0xa54ff53a5f1d36f1),
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UINT64_C(0x510e527fade682d1), UINT64_C(0x9b05688c2b3e6c1f),
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UINT64_C(0x1f83d9abfb41bd6b), UINT64_C(0x5be0cd19137e2179)};
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static const unsigned int blake2b_sigma[12][16] = {
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{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15},
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{14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3},
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{11, 8, 12, 0, 5, 2, 15, 13, 10, 14, 3, 6, 7, 1, 9, 4},
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{7, 9, 3, 1, 13, 12, 11, 14, 2, 6, 5, 10, 4, 0, 15, 8},
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{9, 0, 5, 7, 2, 4, 10, 15, 14, 1, 11, 12, 6, 8, 3, 13},
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{2, 12, 6, 10, 0, 11, 8, 3, 4, 13, 7, 5, 15, 14, 1, 9},
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{12, 5, 1, 15, 14, 13, 4, 10, 0, 7, 6, 3, 9, 2, 8, 11},
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{13, 11, 7, 14, 12, 1, 3, 9, 5, 0, 15, 4, 8, 6, 2, 10},
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{6, 15, 14, 9, 11, 3, 0, 8, 12, 2, 13, 7, 1, 4, 10, 5},
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{10, 2, 8, 4, 7, 6, 1, 5, 15, 11, 9, 14, 3, 12, 13, 0},
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{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15},
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{14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3},
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};
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static BLAKE2_INLINE void blake2b_set_lastnode(blake2b_state *S) {
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S->f[1] = (uint64_t)-1;
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}
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static BLAKE2_INLINE void blake2b_set_lastblock(blake2b_state *S) {
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if (S->last_node) {
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blake2b_set_lastnode(S);
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}
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S->f[0] = (uint64_t)-1;
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}
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static BLAKE2_INLINE void blake2b_increment_counter(blake2b_state *S,
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uint64_t inc) {
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S->t[0] += inc;
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S->t[1] += (S->t[0] < inc);
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}
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static BLAKE2_INLINE void blake2b_invalidate_state(blake2b_state *S) {
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clear_internal_memory(S, sizeof(*S)); /* wipe */
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blake2b_set_lastblock(S); /* invalidate for further use */
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}
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static BLAKE2_INLINE void blake2b_init0(blake2b_state *S) {
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memset(S, 0, sizeof(*S));
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memcpy(S->h, blake2b_IV, sizeof(S->h));
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}
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int blake2b_init_param(blake2b_state *S, const blake2b_param *P) {
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const unsigned char *p = (const unsigned char *)P;
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unsigned int i;
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if (NULL == P || NULL == S) {
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return -1;
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}
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blake2b_init0(S);
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/* IV XOR Parameter Block */
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for (i = 0; i < 8; ++i) {
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S->h[i] ^= load64(&p[i * sizeof(S->h[i])]);
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}
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S->outlen = P->digest_length;
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return 0;
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}
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/* Sequential blake2b initialization */
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int blake2b_init(blake2b_state *S, size_t outlen) {
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blake2b_param P;
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if (S == NULL) {
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return -1;
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}
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if ((outlen == 0) || (outlen > BLAKE2B_OUTBYTES)) {
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blake2b_invalidate_state(S);
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return -1;
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}
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/* Setup Parameter Block for unkeyed BLAKE2 */
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P.digest_length = (uint8_t)outlen;
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P.key_length = 0;
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P.fanout = 1;
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P.depth = 1;
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P.leaf_length = 0;
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P.node_offset = 0;
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P.node_depth = 0;
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P.inner_length = 0;
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memset(P.reserved, 0, sizeof(P.reserved));
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memset(P.salt, 0, sizeof(P.salt));
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memset(P.personal, 0, sizeof(P.personal));
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return blake2b_init_param(S, &P);
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}
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int blake2b_init_key(blake2b_state *S, size_t outlen, const void *key,
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size_t keylen) {
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blake2b_param P;
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if (S == NULL) {
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return -1;
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}
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if ((outlen == 0) || (outlen > BLAKE2B_OUTBYTES)) {
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blake2b_invalidate_state(S);
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return -1;
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}
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if ((key == 0) || (keylen == 0) || (keylen > BLAKE2B_KEYBYTES)) {
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blake2b_invalidate_state(S);
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return -1;
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}
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/* Setup Parameter Block for keyed BLAKE2 */
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P.digest_length = (uint8_t)outlen;
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P.key_length = (uint8_t)keylen;
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P.fanout = 1;
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P.depth = 1;
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P.leaf_length = 0;
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P.node_offset = 0;
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P.node_depth = 0;
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P.inner_length = 0;
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memset(P.reserved, 0, sizeof(P.reserved));
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memset(P.salt, 0, sizeof(P.salt));
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memset(P.personal, 0, sizeof(P.personal));
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if (blake2b_init_param(S, &P) < 0) {
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blake2b_invalidate_state(S);
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return -1;
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}
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{
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uint8_t block[BLAKE2B_BLOCKBYTES];
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memset(block, 0, BLAKE2B_BLOCKBYTES);
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memcpy(block, key, keylen);
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blake2b_update(S, block, BLAKE2B_BLOCKBYTES);
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/* Burn the key from stack */
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clear_internal_memory(block, BLAKE2B_BLOCKBYTES);
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}
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return 0;
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}
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static void blake2b_compress(blake2b_state *S, const uint8_t *block) {
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uint64_t m[16];
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uint64_t v[16];
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unsigned int i, r;
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for (i = 0; i < 16; ++i) {
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m[i] = load64(block + i * sizeof(m[i]));
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}
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for (i = 0; i < 8; ++i) {
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v[i] = S->h[i];
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}
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v[8] = blake2b_IV[0];
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v[9] = blake2b_IV[1];
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v[10] = blake2b_IV[2];
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v[11] = blake2b_IV[3];
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v[12] = blake2b_IV[4] ^ S->t[0];
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v[13] = blake2b_IV[5] ^ S->t[1];
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v[14] = blake2b_IV[6] ^ S->f[0];
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v[15] = blake2b_IV[7] ^ S->f[1];
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#define G(r, i, a, b, c, d) \
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do { \
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a = a + b + m[blake2b_sigma[r][2 * i + 0]]; \
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d = rotr64(d ^ a, 32); \
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c = c + d; \
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b = rotr64(b ^ c, 24); \
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a = a + b + m[blake2b_sigma[r][2 * i + 1]]; \
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d = rotr64(d ^ a, 16); \
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c = c + d; \
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b = rotr64(b ^ c, 63); \
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} while ((void)0, 0)
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#define ROUND(r) \
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do { \
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G(r, 0, v[0], v[4], v[8], v[12]); \
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G(r, 1, v[1], v[5], v[9], v[13]); \
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G(r, 2, v[2], v[6], v[10], v[14]); \
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G(r, 3, v[3], v[7], v[11], v[15]); \
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G(r, 4, v[0], v[5], v[10], v[15]); \
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G(r, 5, v[1], v[6], v[11], v[12]); \
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G(r, 6, v[2], v[7], v[8], v[13]); \
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G(r, 7, v[3], v[4], v[9], v[14]); \
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} while ((void)0, 0)
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for (r = 0; r < 12; ++r) {
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ROUND(r);
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}
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for (i = 0; i < 8; ++i) {
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S->h[i] = S->h[i] ^ v[i] ^ v[i + 8];
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}
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#undef G
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#undef ROUND
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}
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int blake2b_update(blake2b_state *S, const void *in, size_t inlen) {
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const uint8_t *pin = (const uint8_t *)in;
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if (inlen == 0) {
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return 0;
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}
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/* Sanity check */
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if (S == NULL || in == NULL) {
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return -1;
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}
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/* Is this a reused state? */
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if (S->f[0] != 0) {
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return -1;
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}
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if (S->buflen + inlen > BLAKE2B_BLOCKBYTES) {
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/* Complete current block */
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size_t left = S->buflen;
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size_t fill = BLAKE2B_BLOCKBYTES - left;
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memcpy(&S->buf[left], pin, fill);
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blake2b_increment_counter(S, BLAKE2B_BLOCKBYTES);
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blake2b_compress(S, S->buf);
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S->buflen = 0;
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inlen -= fill;
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pin += fill;
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/* Avoid buffer copies when possible */
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while (inlen > BLAKE2B_BLOCKBYTES) {
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blake2b_increment_counter(S, BLAKE2B_BLOCKBYTES);
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blake2b_compress(S, pin);
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inlen -= BLAKE2B_BLOCKBYTES;
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pin += BLAKE2B_BLOCKBYTES;
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}
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}
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memcpy(&S->buf[S->buflen], pin, inlen);
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S->buflen += (unsigned int)inlen;
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return 0;
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}
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int blake2b_final(blake2b_state *S, void *out, size_t outlen) {
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uint8_t buffer[BLAKE2B_OUTBYTES] = {0};
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unsigned int i;
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/* Sanity checks */
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if (S == NULL || out == NULL || outlen < S->outlen) {
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return -1;
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}
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/* Is this a reused state? */
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if (S->f[0] != 0) {
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return -1;
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}
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blake2b_increment_counter(S, S->buflen);
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blake2b_set_lastblock(S);
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memset(&S->buf[S->buflen], 0, BLAKE2B_BLOCKBYTES - S->buflen); /* Padding */
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blake2b_compress(S, S->buf);
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for (i = 0; i < 8; ++i) { /* Output full hash to temp buffer */
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store64(buffer + sizeof(S->h[i]) * i, S->h[i]);
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}
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memcpy(out, buffer, S->outlen);
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clear_internal_memory(buffer, sizeof(buffer));
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clear_internal_memory(S->buf, sizeof(S->buf));
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clear_internal_memory(S->h, sizeof(S->h));
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return 0;
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}
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int blake2b(void *out, size_t outlen, const void *in, size_t inlen,
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const void *key, size_t keylen) {
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blake2b_state S;
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int ret = -1;
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/* Verify parameters */
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if (NULL == in && inlen > 0) {
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goto fail;
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}
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if (NULL == out || outlen == 0 || outlen > BLAKE2B_OUTBYTES) {
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goto fail;
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}
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if ((NULL == key && keylen > 0) || keylen > BLAKE2B_KEYBYTES) {
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goto fail;
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}
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if (keylen > 0) {
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if (blake2b_init_key(&S, outlen, key, keylen) < 0) {
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goto fail;
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}
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} else {
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if (blake2b_init(&S, outlen) < 0) {
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goto fail;
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}
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}
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if (blake2b_update(&S, in, inlen) < 0) {
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goto fail;
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}
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ret = blake2b_final(&S, out, outlen);
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fail:
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clear_internal_memory(&S, sizeof(S));
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return ret;
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}
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/* Argon2 Team - Begin Code */
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int blake2b_long(void *pout, size_t outlen, const void *in, size_t inlen) {
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uint8_t *out = (uint8_t *)pout;
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blake2b_state blake_state;
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uint8_t outlen_bytes[sizeof(uint32_t)] = {0};
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int ret = -1;
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if (outlen > UINT32_MAX) {
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goto fail;
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}
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/* Ensure little-endian byte order! */
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store32(outlen_bytes, (uint32_t)outlen);
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#define TRY(statement) \
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do { \
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ret = statement; \
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if (ret < 0) { \
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goto fail; \
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} \
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} while ((void)0, 0)
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if (outlen <= BLAKE2B_OUTBYTES) {
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TRY(blake2b_init(&blake_state, outlen));
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TRY(blake2b_update(&blake_state, outlen_bytes, sizeof(outlen_bytes)));
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TRY(blake2b_update(&blake_state, in, inlen));
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TRY(blake2b_final(&blake_state, out, outlen));
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} else {
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uint32_t toproduce;
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uint8_t out_buffer[BLAKE2B_OUTBYTES];
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uint8_t in_buffer[BLAKE2B_OUTBYTES];
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TRY(blake2b_init(&blake_state, BLAKE2B_OUTBYTES));
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TRY(blake2b_update(&blake_state, outlen_bytes, sizeof(outlen_bytes)));
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TRY(blake2b_update(&blake_state, in, inlen));
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TRY(blake2b_final(&blake_state, out_buffer, BLAKE2B_OUTBYTES));
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memcpy(out, out_buffer, BLAKE2B_OUTBYTES / 2);
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out += BLAKE2B_OUTBYTES / 2;
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toproduce = (uint32_t)outlen - BLAKE2B_OUTBYTES / 2;
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while (toproduce > BLAKE2B_OUTBYTES) {
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memcpy(in_buffer, out_buffer, BLAKE2B_OUTBYTES);
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TRY(blake2b(out_buffer, BLAKE2B_OUTBYTES, in_buffer,
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BLAKE2B_OUTBYTES, NULL, 0));
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memcpy(out, out_buffer, BLAKE2B_OUTBYTES / 2);
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out += BLAKE2B_OUTBYTES / 2;
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toproduce -= BLAKE2B_OUTBYTES / 2;
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}
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memcpy(in_buffer, out_buffer, BLAKE2B_OUTBYTES);
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TRY(blake2b(out_buffer, toproduce, in_buffer, BLAKE2B_OUTBYTES, NULL,
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0));
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memcpy(out, out_buffer, toproduce);
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}
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fail:
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clear_internal_memory(&blake_state, sizeof(blake_state));
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return ret;
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#undef TRY
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}
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/* Argon2 Team - End Code */
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