demo.c

/*
 * Byte-oriented AES-256 implementation.
 * All lookup tables replaced with 'on the fly' calculations.
 *
 * Copyright (c) 2007 Ilya O. Levin, http://www.literatecode.com
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>

#include "aes256.h"

#define DUMP(s, i, buf, sz) do {					\
	printf(s);							\
	for (i = 0; i < (sz); i++)					\
		printf("%02x ", buf[i]);				\
	printf("\n");							\
} while (0)

int
main(void)
{
	aes256_context ctx;
	uint8_t key[32];
	uint8_t buf[16], i;

	/* Put a test vector. */
	for (i = 0; i < sizeof(buf); i++)
		buf[i] = i * 16 + i;
	for (i = 0; i < sizeof(key); i++)
		key[i] = i;

	DUMP("txt: ", i, buf, sizeof(buf));
	DUMP("key: ", i, key, sizeof(key));
	printf("---\n");

	aes256_init(&ctx, key);
	aes256_encrypt_ecb(&ctx, buf);

	DUMP("enc: ", i, buf, sizeof(buf));
	printf("tst: 8e a2 b7 ca 51 67 45 bf ea fc 49 90 4b 49 60 89\n");

	aes256_init(&ctx, key);
	aes256_decrypt_ecb(&ctx, buf);
	DUMP("dec: ", i, buf, sizeof(buf));

	aes256_done(&ctx);

	return (0);
}