diff options
| -rw-r--r-- | src/libkeccak.h | 2 | ||||
| -rw-r--r-- | src/libkeccak/digest.h | 85 | ||||
| -rw-r--r-- | src/libkeccak/hex.h | 60 | ||||
| -rw-r--r-- | src/libkeccak/state.h | 4 |
4 files changed, 150 insertions, 1 deletions
diff --git a/src/libkeccak.h b/src/libkeccak.h index 1dab356..af6bfac 100644 --- a/src/libkeccak.h +++ b/src/libkeccak.h @@ -22,6 +22,8 @@ #include "libkeccak/spec.h" #include "libkeccak/state.h" +#include "libkeccak/digest.h" +#include "libkeccak/hex.h" #undef diff --git a/src/libkeccak/digest.h b/src/libkeccak/digest.h new file mode 100644 index 0000000..4853631 --- /dev/null +++ b/src/libkeccak/digest.h @@ -0,0 +1,85 @@ +/** + * 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/>. + */ +#ifndef LIBKECCAK_DIGEST_H +#define LIBKECCAK_DIGEST_H 1 + + +#include "state.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 + */ +__attribute__((nonnull(1))) +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 + */ +__attribute__((nonnull(1))) +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 + */ +__attribute__((nonnull, nothrow)) +void libkeccak_simple_squeeze(libkeccak_state_t* restrict state, long times); + + +/** + * 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 + */ +__attribute__((nonnull, nothrow)) +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 + */ +__attribute__((nonnull, nothrow)) +int libkeccak_squeeze(libkeccak_state_t* restrict state, char* restrict hashsum); + + +#undef + diff --git a/src/libkeccak/hex.h b/src/libkeccak/hex.h new file mode 100644 index 0000000..5d9470c --- /dev/null +++ b/src/libkeccak/hex.h @@ -0,0 +1,60 @@ +/** + * 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/>. + */ +#ifndef LIBKECCAK_HEX_H +#define LIBKECCAK_HEX_H 1 + + +#include <stddef.h> + + +/** + * Convert a binary hashsum to lower case hexadecimal representation + * + * @param output Output array, should have an allocation size of at least `2 * n + 1` + * @param hashsum The hashsum to convert + * @param n The size of `hashsum` + */ +__attribute__((leaf, nonnull, nothrow)) +void libkeccak_behex_lower(char* restrict output, const char* restrict hashsum, size_t n); + + +/** + * Convert a binary hashsum to upper case hexadecimal representation + * + * @param output Output array, should have an allocation size of at least `2 * n + 1` + * @param hashsum The hashsum to convert + * @param n The size of `hashsum` + */ +__attribute__((leaf, nonnull, nothrow)) +void libkeccak_behex_upper(char* restrict output, const char* restrict hashsum, size_t n); + + +/** + * Convert a hexadecimal hashsum (both lower case, upper + * case and mixed is supported) to binary representation + * + * @param output Output array, should have an allocation size of at least `strlen(hashsum) / 2` + * @param hashsum The hashsum to convert + */ +__attribute__((leaf, nonnull, nothrow)) +void libkeccak_unhex(char* restrict output, const char* restrict hashsum); + + +#undef + diff --git a/src/libkeccak/state.h b/src/libkeccak/state.h index 5abbb5a..00d8af7 100644 --- a/src/libkeccak/state.h +++ b/src/libkeccak/state.h @@ -30,7 +30,9 @@ /** - * This datastructure describes the state of a hashing process + * Satastructure that describes the state of a hashing process + * + * The `char`-size of the output hashsum is calculated by `(.n + 7) >> 3` */ typedef struct libkeccak_state { |