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/**
* sha3sum – SHA-3 (Keccak) checksum calculator
*
* Copyright © 2013 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 <stdlib.h>
/**
* Initialise Keccak sponge
*
* @param bitrate The bitrate
* @param capacity The capacity
* @param output The output size
*/
extern void initialise(long bitrate, long capacity, long output);
/**
* Dispose of the Keccak sponge
*/
extern void dispose();
/**
* Absorb the more of the message message to the Keccak sponge
*
* @param msg The partial message
* @param msglen The length of the partial message
*/
extern void update(char* msg, long 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
* @param withReturn Whether to return the hash instead of just do a quick squeeze phrase and return {@code null}
* @return The hash sum, or {@code null} if <tt>withReturn</tt> is {@code false}
*/
extern char* digest(char* msg, long msglen, long withReturn);
/**
* Force some rounds of Keccak-f
*
* @param times The number of rounds
*/
extern void simpleSqueeze(long times);
/**
* Squeeze as much as is needed to get a digest a number of times
*
* @param times The number of digests
*/
extern void fastSqueeze(long times);
/**
* Squeeze out another digest
*
* @return The hash sum
*/
extern char* squeeze();
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