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/**
* libkeccak – Keccak-family hashing library
*
* Copyright © 2014 Mattias Andrée (maandree@member.fsf.org)
*
* This library 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 library 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 library. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef LIBKECCAK_FILES_H
#define LIBKECCAK_FILES_H 1
#include "../libkeccak.h"
/**
* Calculate a Keccak-family hashsum of a file,
* the content of the file is assumed non-sensitive
*
* @param fd The file descriptor of the file to hash
* @param state The hashing state, should not be initialised (memory leak otherwise)
* @param spec Specifications for the hashing algorithm
* @param suffix The data suffix, see `libkeccak_digest`
* @param hashsum Output array for the hashsum, have an allocation size of
* at least `(spec->output / 8) * sizeof(char)`, may be `NULL`
* @return Zero on success, -1 on error
*/
__attribute__((nonnull(2, 3)))
int libkeccak_generalised_sum_fd(int fd, libkeccak_state_t* restrict state,
const libkeccak_spec_t* restrict spec,
const char* restrict suffix, char* restrict hashsum);
/**
* Calculate the Keccak hashsum of a file,
* the content of the file is assumed non-sensitive
*
* @param fd The file descriptor of the file to hash
* @param state The hashing state, should not be initialised (memory leak otherwise)
* @param spec Specifications for the hashing algorithm
* @param hashsum Output array for the hashsum, have an allocation size of
* at least `(spec->output / 8) * sizeof(char)`, may be `NULL`
* @return Zero on success, -1 on error
*/
static inline __attribute__((nonnull(2, 3), artificial, gnu_inline))
int libkeccak_keccaksum_fd(int fd, libkeccak_state_t* restrict state,
const libkeccak_spec_t* restrict spec, char* restrict hashsum)
{
return libkeccak_generalised_sum_fd(fd, state, spec, NULL, hashsum);
}
/**
* Calculate the SHA3 hashsum of a file,
* the content of the file is assumed non-sensitive
*
* @param fd The file descriptor of the file to hash
* @param state The hashing state, should not be initialised (memory leak otherwise)
* @param output The output size parameter for the hashing algorithm
* @param hashsum Output array for the hashsum, have an allocation size of
* at least `(output / 8) * sizeof(char)`, may be `NULL`
* @return Zero on success, -1 on error
*/
static inline __attribute__((nonnull(2), artificial, gnu_inline))
int libkeccak_sha3sum_fd(int fd, libkeccak_state_t* restrict state,
long output, char* restrict hashsum)
{
libkeccak_spec_t spec;
libkeccak_spec_sha3(&spec, output);
return libkeccak_generalised_sum_fd(fd, state, &spec, LIBKECCAK_SHA3_SUFFIX, hashsum);
}
/**
* Calculate the RawSHAKE hashsum of a file,
* the content of the file is assumed non-sensitive
*
* @param fd The file descriptor of the file to hash
* @param state The hashing state, should not be initialised (memory leak otherwise)
* @param semicapacity The semicapacity parameter for the hashing algorithm
* @param output The output size parameter for the hashing algorithm
* @param hashsum Output array for the hashsum, have an allocation size of
* at least `(output / 8) * sizeof(char)`, may be `NULL`
* @return Zero on success, -1 on error
*/
static inline __attribute__((nonnull(2), artificial, gnu_inline))
int libkeccak_rawshakesum_fd(int fd, libkeccak_state_t* restrict state,
long semicapacity, long output, char* restrict hashsum)
{
libkeccak_spec_t spec;
libkeccak_spec_rawshake(&spec, semicapacity, output);
return libkeccak_generalised_sum_fd(fd, state, &spec, LIBKECCAK_RAWSHAKE_SUFFIX, hashsum);
}
/**
* Calculate the SHAKE hashsum of a file,
* the content of the file is assumed non-sensitive
*
* @param fd The file descriptor of the file to hash
* @param state The hashing state, should not be initialised (memory leak otherwise)
* @param semicapacity The semicapacity parameter for the hashing algorithm
* @param output The output size parameter for the hashing algorithm
* @param hashsum Output array for the hashsum, have an allocation size of
* at least `(output / 8) * sizeof(char)`, may be `NULL`
* @return Zero on success, -1 on error
*/
static inline __attribute__((nonnull(2), artificial, gnu_inline))
int libkeccak_shakesum_fd(int fd, libkeccak_state_t* restrict state,
long semicapacity, long output, char* restrict hashsum)
{
libkeccak_spec_t spec;
libkeccak_spec_shake(&spec, semicapacity, output);
return libkeccak_generalised_sum_fd(fd, state, &spec, LIBKECCAK_SHAKE_SUFFIX, hashsum);
}
#endif
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