diff options
| -rw-r--r-- | .gitignore | 1 | ||||
| -rw-r--r-- | src/libkeccak/digest.c | 113 | ||||
| -rw-r--r-- | src/libkeccak/digest.h | 7 |
3 files changed, 117 insertions, 4 deletions
@@ -10,6 +10,7 @@ obj/ *.o *.out *.so +*.su *.gch *.info *.pdf diff --git a/src/libkeccak/digest.c b/src/libkeccak/digest.c new file mode 100644 index 0000000..b6fd215 --- /dev/null +++ b/src/libkeccak/digest.c @@ -0,0 +1,113 @@ +/** + * libkeccak – Keccak-family hashing library + * + * Copyright © 2014 Mattias Andrée (maandree@member.fsf.org) + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +#include "digest.h" + + +/** + * Absorb the more of the message to the Keccak sponge + * + * @param state The hashing state + * @param msg The partial message + * @param msglen The length of the partial message + */ +void libkeccak_update(libkeccak_state_t* restrict state, const char* restrict msg, size_t msglen) +{ +} + + +/** + * Absorb the last part of the message and squeeze the Keccak sponge + * + * @param state The hashing state + * @param msg The rest of the message, may be `NULL` + * @param msglen The length of the partial message + * @param bits The number of bits at the end of the message not covered by `msglen` + * @param suffix The suffix concatenate to the message + * @param hashsum Output paramter for the hashsum, may be `NULL` + * @return Zero on success, -1 on error + */ +int libkeccak_digest(libkeccak_state_t* restrict state, const char* restrict msg, size_t msglen, + size_t bits, const char* restrict suffix, char* restrict hashsum) +{ +} + + +/** + * Force some rounds of Keccak-f + * + * @param state The hashing state + * @param times The number of rounds + */ +void libkeccak_simple_squeeze(libkeccak_state_t* restrict state, long times) +{ + while (times--) + libkeccak_f(state); +} + + +/** + * Squeeze as much as is needed to get a digest a number of times + * + * @param state The hashing state + * @param times The number of digests + */ +void libkeccak_fast_squeeze(libkeccak_state_t* restrict state, long times) +{ + times *= (state->n - 1) / state->r + 1; + while (times--) + libkeccak_f(state); +} + + +/** + * Squeeze out another digest + * + * @param state The hashing state + * @param hashsum Output paramter for the hashsum + */ +void libkeccak_squeeze(libkeccak_state_t* restrict state, char* restrict hashsum) +{ + long ww, nn, olen, i, j, k, ptr, rr, ni; + int_fast64_t v; + + libkeccak_f(state); + + ww = state->w >> 3; + nn = (state->n + 7) >> 3; + olen = state->n; + j = ptr = 0; + rr = state->r >> 3; + ni = rr > 25 ? 25 : rr; + + while (olen > 0) + { + for (i = 0; (i < ni) && (j < nn); i++) + { + v = state->S[(i % 5) * 5 + i / 5]; + for (k = 0; k++ < ww; v >>= 8) + if (j++ < nn) + hashsum[ptr++] = (char)v; + } + if (olen -= state->r, olen > 0) + libkeccak_f(state); + } + if (n & 7) + n[nn - 1] &= (1 << (n & 7)) - 1; +} + diff --git a/src/libkeccak/digest.h b/src/libkeccak/digest.h index 4853631..fcd3d50 100644 --- a/src/libkeccak/digest.h +++ b/src/libkeccak/digest.h @@ -73,12 +73,11 @@ void libkeccak_fast_squeeze(libkeccak_state_t* restrict state, long times); /** * Squeeze out another digest * - * @param state The hashing state - * @param hashsum Output paramter for the hashsum - * @return Zero on success, -1 on error + * @param state The hashing state + * @param hashsum Output paramter for the hashsum */ __attribute__((nonnull, nothrow)) -int libkeccak_squeeze(libkeccak_state_t* restrict state, char* restrict hashsum); +void libkeccak_squeeze(libkeccak_state_t* restrict state, char* restrict hashsum); #undef |