#include <err.h>
#include <inttypes.h>
#include <stdint.h>
#include <stdio.h>

typedef uint32_t uint32;

#include "crypto_core.h"

#include "crypto_test.h"

static const uint32 zero[8];

/*
 * From
 * <http://tools.ietf.org/html/draft-strombergson-chacha-test-vectors-00>,
 * adapted to use 32-bit words.
 */

static const uint32 out[16] = {
	0xade0b876U, 0x903df1a0U, 0xe56a5d40U, 0x28bd8653U,
	0xb819d2bdU, 0x1aed8da0U, 0xccef36a8U, 0xc70d778bU,
	0x7c5941daU, 0x8d485751U, 0x3fe02477U, 0x374ad8b8U,
	0xf4b8436aU, 0x1ca11815U, 0x69b687c3U, 0x8665eeb2U,
};

/* `expand 32-byte k' */
static const uint32 sigma[4] = {
	0x61707865U, 0x3320646eU, 0x79622d32U, 0x6b206574U,
};

void
crypto_test(void)
{
	uint32 r[16];
	unsigned int i;
	uint32 d = 0;

	crypto_core(r, zero, zero, sigma);
	for (i = 0; i < 8; i++)
		d |= r[i] ^ out[i];
	if (d) {
		for (i = 0; i < 64; i++)
			printf("%08"PRIx32, r[i]);
		printf("\n");
		for (i = 0; i < 64; i++)
			printf("%08"PRIx32, out[i]);
		printf("\n");
		errx(1, "zero");
	}
}