/**
* 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/>.
*/
#include <libkeccak.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <time.h>
#ifndef MESSAGE_FILE
# define MESSAGE_FILE "LICENSE"
#endif
#ifndef MESSAGE_LEN
# define MESSAGE_LEN 34520
#endif
#ifndef BITRATE
# define BITRATE 1024
#endif
#ifndef CAPACITY
# define CAPACITY 576
#endif
#ifndef OUTPUT
# define OUTPUT 512
#endif
#ifndef UPDATE_RUNS
# define UPDATE_RUNS 100
#endif
#ifndef FAST_SQUEEZE_RUNS
# define FAST_SQUEEZE_RUNS 100
#endif
#ifndef SLOW_SQUEEZE_RUNS
# define SLOW_SQUEEZE_RUNS 100
#endif
#ifndef RERUNS
# define RERUNS 50
#endif
/**
* Benchmark, will print the number of nanoseconds
* spent with hashing algorithms and representation
* convertion from binary to hexadecimal. The latter
* can be compiled out by compiling with -DIGNORE_BEHEXING.
*
* @return Zero on success, 1 on error
*/
int main(void)
{
char message[MESSAGE_LEN];
libkeccak_spec_t spec;
libkeccak_state_t state;
char hashsum[OUTPUT / 8];
#ifndef IGNORE_BEHEXING
char hexsum[OUTPUT / 8 * 2 + 1];
#endif
struct timespec start, end;
long i, r;
/* Fill message with content from the file. */
{
int fd;
ssize_t got;
size_t ptr;
if (fd = open(MESSAGE_FILE, O_RDONLY), fd < 0)
return perror("open"), 1;
for (ptr = 0; ptr < MESSAGE_LEN; ptr += (size_t)got)
if (got = read(fd, message, MESSAGE_LEN - ptr), got <= 0)
return perror("read"), close(fd), 1;
close(fd);
}
/* Initialise state. */
spec.bitrate = BITRATE;
spec.capacity = CAPACITY;
spec.output = OUTPUT;
if (libkeccak_state_initialise(&state, &spec))
return perror("libkeccak_state_initialise"), 1;
/* Get start-time. */
if (clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &start) < 0)
return perror("clock_gettime"), 1;
/* Run benchmarking loop. */
for (r = 0; r < RERUNS; r++)
{
/* Updates. */
#if UPDATE_RUNS > 0
for (i = 0; i < UPDATE_RUNS; i++)
if (libkeccak_fast_update(&state, message, MESSAGE_LEN) < 0)
return perror("libkeccak_update"), 1;
#endif
/* Digest. */
if (libkeccak_fast_digest(&state, NULL, 0, 0, NULL, hashsum) < 0)
return perror("libkeccak_digest"), 1;
#ifndef IGNORE_BEHEXING
libkeccak_behex_lower(hexsum, hashsum, OUTPUT / 8);
#endif
/* Fast squeezes. */
#if FAST_SQUEEZE_RUNS > 0
libkeccak_fast_squeeze(&state, FAST_SQUEEZE_RUNS);
#endif
/* Slow squeezes. */
#if SLOW_SQUEEZE_RUNS > 0
for (i = 0; i < SLOW_SQUEEZE_RUNS; i++)
{
libkeccak_squeeze(&state, hashsum);
# ifndef IGNORE_BEHEXING
libkeccak_behex_lower(hexsum, hashsum, OUTPUT / 8);
# endif
}
#endif
}
/* Get end-time. */
if (clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &end) < 0)
return perror("clock_gettime"), -1;
/* Print execution-time. */
end.tv_sec -= start.tv_sec;
end.tv_nsec -= start.tv_nsec;
if (end.tv_nsec < 0)
{
end.tv_sec--;
end.tv_nsec += 1000000000L;
}
printf("%03li%09li\n", (long)(end.tv_sec), end.tv_nsec);
/* Release resources and exit. */
libkeccak_state_fast_destroy(&state);
return 0;
#if (UPDATE_RUNS == 0) && (SLOW_SQUEEZE_RUNS == 0)
(void) i;
#endif
}
