mirror of
https://github.com/trezor/trezor-firmware.git
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315 lines
9.6 KiB
C
315 lines
9.6 KiB
C
/*
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BLAKE2 reference source code package - reference C implementations
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Copyright 2012, Samuel Neves <sneves@dei.uc.pt>. You may use this under the
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terms of the CC0, the OpenSSL Licence, or the Apache Public License 2.0, at
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your option. The terms of these licenses can be found at:
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- CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0
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- OpenSSL license : https://www.openssl.org/source/license.html
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- Apache 2.0 : http://www.apache.org/licenses/LICENSE-2.0
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More information about the BLAKE2 hash function can be found at
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https://blake2.net.
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*/
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#include <string.h>
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#include "blake2_common.h"
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#include "blake2b.h"
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#include "memzero.h"
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#include "options.h"
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typedef struct blake2b_param__ {
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uint8_t digest_length; /* 1 */
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uint8_t key_length; /* 2 */
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uint8_t fanout; /* 3 */
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uint8_t depth; /* 4 */
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uint32_t leaf_length; /* 8 */
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uint32_t node_offset; /* 12 */
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uint32_t xof_length; /* 16 */
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uint8_t node_depth; /* 17 */
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uint8_t inner_length; /* 18 */
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uint8_t reserved[14]; /* 32 */
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uint8_t salt[BLAKE2B_SALTBYTES]; /* 48 */
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uint8_t personal[BLAKE2B_PERSONALBYTES]; /* 64 */
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} __attribute__((packed)) blake2b_param;
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static const uint64_t blake2b_IV[8] = {
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0x6a09e667f3bcc908ULL, 0xbb67ae8584caa73bULL, 0x3c6ef372fe94f82bULL,
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0xa54ff53a5f1d36f1ULL, 0x510e527fade682d1ULL, 0x9b05688c2b3e6c1fULL,
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0x1f83d9abfb41bd6bULL, 0x5be0cd19137e2179ULL};
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static const uint8_t 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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static void blake2b_set_lastnode(blake2b_state *S) { S->f[1] = (uint64_t)-1; }
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/* Some helper functions, not necessarily useful */
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static int blake2b_is_lastblock(const blake2b_state *S) { return S->f[0] != 0; }
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static void blake2b_set_lastblock(blake2b_state *S) {
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if (S->last_node) blake2b_set_lastnode(S);
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S->f[0] = (uint64_t)-1;
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}
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static void blake2b_increment_counter(blake2b_state *S, const 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 void blake2b_init0(blake2b_state *S) {
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size_t i = 0;
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memzero(S, sizeof(blake2b_state));
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for (i = 0; i < 8; ++i) S->h[i] = blake2b_IV[i];
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}
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/* init xors IV with input parameter block */
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int blake2b_init_param(blake2b_state *S, const blake2b_param *P) {
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const uint8_t *p = (const uint8_t *)(P);
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size_t i = 0;
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blake2b_init0(S);
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/* IV XOR ParamBlock */
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for (i = 0; i < 8; ++i) S->h[i] ^= load64(p + sizeof(S->h[i]) * i);
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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[1] = {0};
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if ((!outlen) || (outlen > BLAKE2B_OUTBYTES)) return -1;
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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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store32(&P->leaf_length, 0);
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store32(&P->node_offset, 0);
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store32(&P->xof_length, 0);
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P->node_depth = 0;
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P->inner_length = 0;
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memzero(P->reserved, sizeof(P->reserved));
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memzero(P->salt, sizeof(P->salt));
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memzero(P->personal, sizeof(P->personal));
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return blake2b_init_param(S, P);
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}
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int blake2b_InitPersonal(blake2b_state *S, size_t outlen, const void *personal,
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size_t personal_len) {
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blake2b_param P[1] = {0};
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if ((!outlen) || (outlen > BLAKE2B_OUTBYTES)) return -1;
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if ((!personal) || (personal_len != BLAKE2B_PERSONALBYTES)) return -1;
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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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store32(&P->leaf_length, 0);
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store32(&P->node_offset, 0);
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store32(&P->xof_length, 0);
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P->node_depth = 0;
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P->inner_length = 0;
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memzero(P->reserved, sizeof(P->reserved));
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memzero(P->salt, sizeof(P->salt));
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memcpy(P->personal, personal, BLAKE2B_PERSONALBYTES);
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return blake2b_init_param(S, P);
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}
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int blake2b_InitKey(blake2b_state *S, size_t outlen, const void *key,
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size_t keylen) {
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blake2b_param P[1] = {0};
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if ((!outlen) || (outlen > BLAKE2B_OUTBYTES)) return -1;
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if (!key || !keylen || keylen > BLAKE2B_KEYBYTES) return -1;
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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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store32(&P->leaf_length, 0);
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store32(&P->node_offset, 0);
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store32(&P->xof_length, 0);
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P->node_depth = 0;
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P->inner_length = 0;
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memzero(P->reserved, sizeof(P->reserved));
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memzero(P->salt, sizeof(P->salt));
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memzero(P->personal, sizeof(P->personal));
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if (blake2b_init_param(S, P) < 0) return -1;
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{
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uint8_t block[BLAKE2B_BLOCKBYTES] = {0};
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memzero(block, BLAKE2B_BLOCKBYTES);
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memcpy(block, key, keylen);
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blake2b_Update(S, block, BLAKE2B_BLOCKBYTES);
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memzero(block, BLAKE2B_BLOCKBYTES); /* Burn the key from stack */
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}
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return 0;
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}
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#define G(m, 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 (0)
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#if OPTIMIZE_SIZE_BLAKE2B
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static void g(uint64_t *m, int r, int i, uint64_t *a, uint64_t *b, uint64_t *c,
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uint64_t *d) {
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G(m, r, i, a, b, c, d);
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}
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#else
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#define g(m, r, i, a, b, c, d) G(m, r, i, a, b, c, d)
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#endif
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#define ROUND(m, v, r) \
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do { \
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g(m, r, 0, v + 0, v + 4, v + 8, v + 12); \
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g(m, r, 1, v + 1, v + 5, v + 9, v + 13); \
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g(m, r, 2, v + 2, v + 6, v + 10, v + 14); \
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g(m, r, 3, v + 3, v + 7, v + 11, v + 15); \
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g(m, r, 4, v + 0, v + 5, v + 10, v + 15); \
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g(m, r, 5, v + 1, v + 6, v + 11, v + 12); \
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g(m, r, 6, v + 2, v + 7, v + 8, v + 13); \
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g(m, r, 7, v + 3, v + 4, v + 9, v + 14); \
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} while (0)
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static void blake2b_compress(blake2b_state *S,
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const uint8_t block[BLAKE2B_BLOCKBYTES]) {
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uint64_t m[16] = {0};
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uint64_t v[16] = {0};
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size_t i = 0;
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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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#if OPTIMIZE_SIZE_BLAKE2B
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for (int r = 0; r < 12; r++) {
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ROUND(m, v, r);
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}
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#else
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ROUND(m, v, 0);
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ROUND(m, v, 1);
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ROUND(m, v, 2);
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ROUND(m, v, 3);
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ROUND(m, v, 4);
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ROUND(m, v, 5);
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ROUND(m, v, 6);
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ROUND(m, v, 7);
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ROUND(m, v, 8);
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ROUND(m, v, 9);
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ROUND(m, v, 10);
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ROUND(m, v, 11);
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#endif
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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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}
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#undef G
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#undef ROUND
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int blake2b_Update(blake2b_state *S, const void *pin, size_t inlen) {
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const unsigned char *in = (const unsigned char *)pin;
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if (inlen > 0) {
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size_t left = S->buflen;
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size_t fill = BLAKE2B_BLOCKBYTES - left;
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if (inlen > fill) {
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S->buflen = 0;
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memcpy(S->buf + left, in, fill); /* Fill buffer */
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blake2b_increment_counter(S, BLAKE2B_BLOCKBYTES);
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blake2b_compress(S, S->buf); /* Compress */
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in += fill;
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inlen -= fill;
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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, in);
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in += BLAKE2B_BLOCKBYTES;
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inlen -= BLAKE2B_BLOCKBYTES;
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}
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}
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memcpy(S->buf + S->buflen, in, inlen);
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S->buflen += inlen;
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}
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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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size_t i = 0;
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if (out == NULL || outlen < S->outlen) return -1;
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if (blake2b_is_lastblock(S)) return -1;
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blake2b_increment_counter(S, S->buflen);
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blake2b_set_lastblock(S);
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memzero(S->buf + S->buflen, 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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memcpy(out, buffer, S->outlen);
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memzero(buffer, sizeof(buffer));
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return 0;
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}
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int blake2b(const uint8_t *msg, uint32_t msg_len, void *out, size_t outlen) {
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BLAKE2B_CTX ctx;
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if (0 != blake2b_Init(&ctx, outlen)) return -1;
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if (0 != blake2b_Update(&ctx, msg, msg_len)) return -1;
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if (0 != blake2b_Final(&ctx, out, outlen)) return -1;
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return 0;
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}
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int blake2b_Key(const uint8_t *msg, uint32_t msg_len, const void *key,
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size_t keylen, void *out, size_t outlen) {
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BLAKE2B_CTX ctx;
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if (0 != blake2b_InitKey(&ctx, outlen, key, keylen)) return -1;
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if (0 != blake2b_Update(&ctx, msg, msg_len)) return -1;
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if (0 != blake2b_Final(&ctx, out, outlen)) return -1;
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return 0;
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}
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