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/**
* file2key – A simple command that generates a key from a file and a passphrase
*
* 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 <stddef.h>
#include <inttypes.h>
/**
* Initialise Keccak sponge
*/
void initialise(void);
/**
* Dispose of the Keccak sponge
*/
void dispose(void);
/**
* Absorb the more of the message message to the Keccak sponge
*
* @param msg The partial message
* @param msglen The length of the partial message
*/
void update(const char* restrict msg, size_t msglen);
/**
* Absorb the last part of the message and squeeze the Keccak sponge
*
* @param msg The rest of the message, may be {@code null}
* @param msglen The length of the partial message
* @return The hash sum
*/
char* digest(const char* restrict msg, size_t msglen);
/**
* Squeeze out another digest
*
* @return The hash sum
*/
char* squeeze(void);
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