/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://opensource.org/licenses/CDDL-1.0.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2013 Saso Kiselkov. All rights reserved.
 */

/*
 * This is just to keep the compiler happy about sys/time.h not declaring
 * gettimeofday due to -D_KERNEL (we can do this since we're actually
 * running in userspace, but we need -D_KERNEL for the remaining Skein code).
 */
#ifdef	_KERNEL
#undef	_KERNEL
#endif

#include <sys/skein.h>
#include <stdlib.h>
#include <strings.h>
#include <stdio.h>
#include <sys/time.h>
#include <note.h>

/*
 * Skein test suite using values from the Skein V1.3 specification found at:
 * http://www.skein-hash.info/sites/default/files/skein1.3.pdf
 */

/*
 * Test messages from the Skein spec, Appendix C.
 */
const uint8_t	test_msg0[] = {
	0xFF
};

const uint8_t	test_msg1[] = {
	0xFF, 0xFE, 0xFD, 0xFC, 0xFB, 0xFA, 0xF9, 0xF8,
	0xF7, 0xF6, 0xF5, 0xF4, 0xF3, 0xF2, 0xF1, 0xF0,
	0xEF, 0xEE, 0xED, 0xEC, 0xEB, 0xEA, 0xE9, 0xE8,
	0xE7, 0xE6, 0xE5, 0xE4, 0xE3, 0xE2, 0xE1, 0xE0
};

const uint8_t	test_msg2[] = {
	0xFF, 0xFE, 0xFD, 0xFC, 0xFB, 0xFA, 0xF9, 0xF8,
	0xF7, 0xF6, 0xF5, 0xF4, 0xF3, 0xF2, 0xF1, 0xF0,
	0xEF, 0xEE, 0xED, 0xEC, 0xEB, 0xEA, 0xE9, 0xE8,
	0xE7, 0xE6, 0xE5, 0xE4, 0xE3, 0xE2, 0xE1, 0xE0,
	0xDF, 0xDE, 0xDD, 0xDC, 0xDB, 0xDA, 0xD9, 0xD8,
	0xD7, 0xD6, 0xD5, 0xD4, 0xD3, 0xD2, 0xD1, 0xD0,
	0xCF, 0xCE, 0xCD, 0xCC, 0xCB, 0xCA, 0xC9, 0xC8,
	0xC7, 0xC6, 0xC5, 0xC4, 0xC3, 0xC2, 0xC1, 0xC0
};

const uint8_t	test_msg3[] = {
	0xFF, 0xFE, 0xFD, 0xFC, 0xFB, 0xFA, 0xF9, 0xF8,
	0xF7, 0xF6, 0xF5, 0xF4, 0xF3, 0xF2, 0xF1, 0xF0,
	0xEF, 0xEE, 0xED, 0xEC, 0xEB, 0xEA, 0xE9, 0xE8,
	0xE7, 0xE6, 0xE5, 0xE4, 0xE3, 0xE2, 0xE1, 0xE0,
	0xDF, 0xDE, 0xDD, 0xDC, 0xDB, 0xDA, 0xD9, 0xD8,
	0xD7, 0xD6, 0xD5, 0xD4, 0xD3, 0xD2, 0xD1, 0xD0,
	0xCF, 0xCE, 0xCD, 0xCC, 0xCB, 0xCA, 0xC9, 0xC8,
	0xC7, 0xC6, 0xC5, 0xC4, 0xC3, 0xC2, 0xC1, 0xC0,
	0xBF, 0xBE, 0xBD, 0xBC, 0xBB, 0xBA, 0xB9, 0xB8,
	0xB7, 0xB6, 0xB5, 0xB4, 0xB3, 0xB2, 0xB1, 0xB0,
	0xAF, 0xAE, 0xAD, 0xAC, 0xAB, 0xAA, 0xA9, 0xA8,
	0xA7, 0xA6, 0xA5, 0xA4, 0xA3, 0xA2, 0xA1, 0xA0,
	0x9F, 0x9E, 0x9D, 0x9C, 0x9B, 0x9A, 0x99, 0x98,
	0x97, 0x96, 0x95, 0x94, 0x93, 0x92, 0x91, 0x90,
	0x8F, 0x8E, 0x8D, 0x8C, 0x8B, 0x8A, 0x89, 0x88,
	0x87, 0x86, 0x85, 0x84, 0x83, 0x82, 0x81, 0x80
};

const uint8_t	test_msg4[] = {
	0xFF, 0xFE, 0xFD, 0xFC, 0xFB, 0xFA, 0xF9, 0xF8,
	0xF7, 0xF6, 0xF5, 0xF4, 0xF3, 0xF2, 0xF1, 0xF0,
	0xEF, 0xEE, 0xED, 0xEC, 0xEB, 0xEA, 0xE9, 0xE8,
	0xE7, 0xE6, 0xE5, 0xE4, 0xE3, 0xE2, 0xE1, 0xE0,
	0xDF, 0xDE, 0xDD, 0xDC, 0xDB, 0xDA, 0xD9, 0xD8,
	0xD7, 0xD6, 0xD5, 0xD4, 0xD3, 0xD2, 0xD1, 0xD0,
	0xCF, 0xCE, 0xCD, 0xCC, 0xCB, 0xCA, 0xC9, 0xC8,
	0xC7, 0xC6, 0xC5, 0xC4, 0xC3, 0xC2, 0xC1, 0xC0,
	0xBF, 0xBE, 0xBD, 0xBC, 0xBB, 0xBA, 0xB9, 0xB8,
	0xB7, 0xB6, 0xB5, 0xB4, 0xB3, 0xB2, 0xB1, 0xB0,
	0xAF, 0xAE, 0xAD, 0xAC, 0xAB, 0xAA, 0xA9, 0xA8,
	0xA7, 0xA6, 0xA5, 0xA4, 0xA3, 0xA2, 0xA1, 0xA0,
	0x9F, 0x9E, 0x9D, 0x9C, 0x9B, 0x9A, 0x99, 0x98,
	0x97, 0x96, 0x95, 0x94, 0x93, 0x92, 0x91, 0x90,
	0x8F, 0x8E, 0x8D, 0x8C, 0x8B, 0x8A, 0x89, 0x88,
	0x87, 0x86, 0x85, 0x84, 0x83, 0x82, 0x81, 0x80,
	0x7F, 0x7E, 0x7D, 0x7C, 0x7B, 0x7A, 0x79, 0x78,
	0x77, 0x76, 0x75, 0x74, 0x73, 0x72, 0x71, 0x70,
	0x6F, 0x6E, 0x6D, 0x6C, 0x6B, 0x6A, 0x69, 0x68,
	0x67, 0x66, 0x65, 0x64, 0x63, 0x62, 0x61, 0x60,
	0x5F, 0x5E, 0x5D, 0x5C, 0x5B, 0x5A, 0x59, 0x58,
	0x57, 0x56, 0x55, 0x54, 0x53, 0x52, 0x51, 0x50,
	0x4F, 0x4E, 0x4D, 0x4C, 0x4B, 0x4A, 0x49, 0x48,
	0x47, 0x46, 0x45, 0x44, 0x43, 0x42, 0x41, 0x40,
	0x3F, 0x3E, 0x3D, 0x3C, 0x3B, 0x3A, 0x39, 0x38,
	0x37, 0x36, 0x35, 0x34, 0x33, 0x32, 0x31, 0x30,
	0x2F, 0x2E, 0x2D, 0x2C, 0x2B, 0x2A, 0x29, 0x28,
	0x27, 0x26, 0x25, 0x24, 0x23, 0x22, 0x21, 0x20,
	0x1F, 0x1E, 0x1D, 0x1C, 0x1B, 0x1A, 0x19, 0x18,
	0x17, 0x16, 0x15, 0x14, 0x13, 0x12, 0x11, 0x10,
	0x0F, 0x0E, 0x0D, 0x0C, 0x0B, 0x0A, 0x09, 0x08,
	0x07, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x00
};

/*
 * Test digests from the Skein spec, Appendix C.
 */
const uint8_t	skein_256_test_digests[][32] = {
	{
		/* for test_msg0 */
		0x0B, 0x98, 0xDC, 0xD1, 0x98, 0xEA, 0x0E, 0x50,
		0xA7, 0xA2, 0x44, 0xC4, 0x44, 0xE2, 0x5C, 0x23,
		0xDA, 0x30, 0xC1, 0x0F, 0xC9, 0xA1, 0xF2, 0x70,
		0xA6, 0x63, 0x7F, 0x1F, 0x34, 0xE6, 0x7E, 0xD2
	},
	{
		/* for test_msg1 */
		0x8D, 0x0F, 0xA4, 0xEF, 0x77, 0x7F, 0xD7, 0x59,
		0xDF, 0xD4, 0x04, 0x4E, 0x6F, 0x6A, 0x5A, 0xC3,
		0xC7, 0x74, 0xAE, 0xC9, 0x43, 0xDC, 0xFC, 0x07,
		0x92, 0x7B, 0x72, 0x3B, 0x5D, 0xBF, 0x40, 0x8B
	},
	{
		/* for test_msg2 */
		0xDF, 0x28, 0xE9, 0x16, 0x63, 0x0D, 0x0B, 0x44,
		0xC4, 0xA8, 0x49, 0xDC, 0x9A, 0x02, 0xF0, 0x7A,
		0x07, 0xCB, 0x30, 0xF7, 0x32, 0x31, 0x82, 0x56,
		0xB1, 0x5D, 0x86, 0x5A, 0xC4, 0xAE, 0x16, 0x2F
	}
	/* no test digests for test_msg3 and test_msg4 */
};

const uint8_t	skein_512_test_digests[][64] = {
	{
		/* for test_msg0 */
		0x71, 0xB7, 0xBC, 0xE6, 0xFE, 0x64, 0x52, 0x22,
		0x7B, 0x9C, 0xED, 0x60, 0x14, 0x24, 0x9E, 0x5B,
		0xF9, 0xA9, 0x75, 0x4C, 0x3A, 0xD6, 0x18, 0xCC,
		0xC4, 0xE0, 0xAA, 0xE1, 0x6B, 0x31, 0x6C, 0xC8,
		0xCA, 0x69, 0x8D, 0x86, 0x43, 0x07, 0xED, 0x3E,
		0x80, 0xB6, 0xEF, 0x15, 0x70, 0x81, 0x2A, 0xC5,
		0x27, 0x2D, 0xC4, 0x09, 0xB5, 0xA0, 0x12, 0xDF,
		0x2A, 0x57, 0x91, 0x02, 0xF3, 0x40, 0x61, 0x7A
	},
	{
		/* no test vector for test_msg1 */
		0
	},
	{
		/* for test_msg2 */
		0x45, 0x86, 0x3B, 0xA3, 0xBE, 0x0C, 0x4D, 0xFC,
		0x27, 0xE7, 0x5D, 0x35, 0x84, 0x96, 0xF4, 0xAC,
		0x9A, 0x73, 0x6A, 0x50, 0x5D, 0x93, 0x13, 0xB4,
		0x2B, 0x2F, 0x5E, 0xAD, 0xA7, 0x9F, 0xC1, 0x7F,
		0x63, 0x86, 0x1E, 0x94, 0x7A, 0xFB, 0x1D, 0x05,
		0x6A, 0xA1, 0x99, 0x57, 0x5A, 0xD3, 0xF8, 0xC9,
		0xA3, 0xCC, 0x17, 0x80, 0xB5, 0xE5, 0xFA, 0x4C,
		0xAE, 0x05, 0x0E, 0x98, 0x98, 0x76, 0x62, 0x5B
	},
	{
		/* for test_msg3 */
		0x91, 0xCC, 0xA5, 0x10, 0xC2, 0x63, 0xC4, 0xDD,
		0xD0, 0x10, 0x53, 0x0A, 0x33, 0x07, 0x33, 0x09,
		0x62, 0x86, 0x31, 0xF3, 0x08, 0x74, 0x7E, 0x1B,
		0xCB, 0xAA, 0x90, 0xE4, 0x51, 0xCA, 0xB9, 0x2E,
		0x51, 0x88, 0x08, 0x7A, 0xF4, 0x18, 0x87, 0x73,
		0xA3, 0x32, 0x30, 0x3E, 0x66, 0x67, 0xA7, 0xA2,
		0x10, 0x85, 0x6F, 0x74, 0x21, 0x39, 0x00, 0x00,
		0x71, 0xF4, 0x8E, 0x8B, 0xA2, 0xA5, 0xAD, 0xB7
	}
	/* no test digests for test_msg4 */
};

const uint8_t	skein_1024_test_digests[][128] = {
	{
		/* for test_msg0 */
		0xE6, 0x2C, 0x05, 0x80, 0x2E, 0xA0, 0x15, 0x24,
		0x07, 0xCD, 0xD8, 0x78, 0x7F, 0xDA, 0x9E, 0x35,
		0x70, 0x3D, 0xE8, 0x62, 0xA4, 0xFB, 0xC1, 0x19,
		0xCF, 0xF8, 0x59, 0x0A, 0xFE, 0x79, 0x25, 0x0B,
		0xCC, 0xC8, 0xB3, 0xFA, 0xF1, 0xBD, 0x24, 0x22,
		0xAB, 0x5C, 0x0D, 0x26, 0x3F, 0xB2, 0xF8, 0xAF,
		0xB3, 0xF7, 0x96, 0xF0, 0x48, 0x00, 0x03, 0x81,
		0x53, 0x1B, 0x6F, 0x00, 0xD8, 0x51, 0x61, 0xBC,
		0x0F, 0xFF, 0x4B, 0xEF, 0x24, 0x86, 0xB1, 0xEB,
		0xCD, 0x37, 0x73, 0xFA, 0xBF, 0x50, 0xAD, 0x4A,
		0xD5, 0x63, 0x9A, 0xF9, 0x04, 0x0E, 0x3F, 0x29,
		0xC6, 0xC9, 0x31, 0x30, 0x1B, 0xF7, 0x98, 0x32,
		0xE9, 0xDA, 0x09, 0x85, 0x7E, 0x83, 0x1E, 0x82,
		0xEF, 0x8B, 0x46, 0x91, 0xC2, 0x35, 0x65, 0x65,
		0x15, 0xD4, 0x37, 0xD2, 0xBD, 0xA3, 0x3B, 0xCE,
		0xC0, 0x01, 0xC6, 0x7F, 0xFD, 0xE1, 0x5B, 0xA8
	},
	{
		/* no test vector for test_msg1 */
		0
	},
	{
		/* no test vector for test_msg2 */
		0
	},
	{
		/* for test_msg3 */
		0x1F, 0x3E, 0x02, 0xC4, 0x6F, 0xB8, 0x0A, 0x3F,
		0xCD, 0x2D, 0xFB, 0xBC, 0x7C, 0x17, 0x38, 0x00,
		0xB4, 0x0C, 0x60, 0xC2, 0x35, 0x4A, 0xF5, 0x51,
		0x18, 0x9E, 0xBF, 0x43, 0x3C, 0x3D, 0x85, 0xF9,
		0xFF, 0x18, 0x03, 0xE6, 0xD9, 0x20, 0x49, 0x31,
		0x79, 0xED, 0x7A, 0xE7, 0xFC, 0xE6, 0x9C, 0x35,
		0x81, 0xA5, 0xA2, 0xF8, 0x2D, 0x3E, 0x0C, 0x7A,
		0x29, 0x55, 0x74, 0xD0, 0xCD, 0x7D, 0x21, 0x7C,
		0x48, 0x4D, 0x2F, 0x63, 0x13, 0xD5, 0x9A, 0x77,
		0x18, 0xEA, 0xD0, 0x7D, 0x07, 0x29, 0xC2, 0x48,
		0x51, 0xD7, 0xE7, 0xD2, 0x49, 0x1B, 0x90, 0x2D,
		0x48, 0x91, 0x94, 0xE6, 0xB7, 0xD3, 0x69, 0xDB,
		0x0A, 0xB7, 0xAA, 0x10, 0x6F, 0x0E, 0xE0, 0xA3,
		0x9A, 0x42, 0xEF, 0xC5, 0x4F, 0x18, 0xD9, 0x37,
		0x76, 0x08, 0x09, 0x85, 0xF9, 0x07, 0x57, 0x4F,
		0x99, 0x5E, 0xC6, 0xA3, 0x71, 0x53, 0xA5, 0x78
	},
	{
		/* for test_msg4 */
		0x84, 0x2A, 0x53, 0xC9, 0x9C, 0x12, 0xB0, 0xCF,
		0x80, 0xCF, 0x69, 0x49, 0x1B, 0xE5, 0xE2, 0xF7,
		0x51, 0x5D, 0xE8, 0x73, 0x3B, 0x6E, 0xA9, 0x42,
		0x2D, 0xFD, 0x67, 0x66, 0x65, 0xB5, 0xFA, 0x42,
		0xFF, 0xB3, 0xA9, 0xC4, 0x8C, 0x21, 0x77, 0x77,
		0x95, 0x08, 0x48, 0xCE, 0xCD, 0xB4, 0x8F, 0x64,
		0x0F, 0x81, 0xFB, 0x92, 0xBE, 0xF6, 0xF8, 0x8F,
		0x7A, 0x85, 0xC1, 0xF7, 0xCD, 0x14, 0x46, 0xC9,
		0x16, 0x1C, 0x0A, 0xFE, 0x8F, 0x25, 0xAE, 0x44,
		0x4F, 0x40, 0xD3, 0x68, 0x00, 0x81, 0xC3, 0x5A,
		0xA4, 0x3F, 0x64, 0x0F, 0xD5, 0xFA, 0x3C, 0x3C,
		0x03, 0x0B, 0xCC, 0x06, 0xAB, 0xAC, 0x01, 0xD0,
		0x98, 0xBC, 0xC9, 0x84, 0xEB, 0xD8, 0x32, 0x27,
		0x12, 0x92, 0x1E, 0x00, 0xB1, 0xBA, 0x07, 0xD6,
		0xD0, 0x1F, 0x26, 0x90, 0x70, 0x50, 0x25, 0x5E,
		0xF2, 0xC8, 0xE2, 0x4F, 0x71, 0x6C, 0x52, 0xA5
	}
};

int
main(int argc, char *argv[])
{
	boolean_t	failed = B_FALSE;
	uint64_t	cpu_mhz = 0;

	if (argc == 2)
		cpu_mhz = atoi(argv[1]);

#define	SKEIN_ALGO_TEST(_m, mode, diglen, testdigest)			\
	do {								\
		Skein ## mode ## _Ctxt_t	ctx;			\
		uint8_t				digest[diglen / 8];	\
		(void) Skein ## mode ## _Init(&ctx, diglen);		\
		(void) Skein ## mode ## _Update(&ctx, _m, sizeof (_m));	\
		(void) Skein ## mode ## _Final(&ctx, digest);		\
		(void) printf("Skein" #mode "/" #diglen			\
		    "\tMessage: " #_m "\tResult: ");			\
		if (bcmp(digest, testdigest, diglen / 8) == 0) {	\
			(void) printf("OK\n");				\
		} else {						\
			(void) printf("FAILED!\n");			\
			failed = B_TRUE;				\
		}							\
		NOTE(CONSTCOND)						\
	} while (0)

#define	SKEIN_PERF_TEST(mode, diglen)					\
	do {								\
		Skein ## mode ## _Ctxt_t ctx;				\
		uint8_t		digest[diglen / 8];			\
		uint8_t		block[131072];				\
		uint64_t	delta;					\
		double		cpb = 0;				\
		int		i;					\
		struct timeval	start, end;				\
		bzero(block, sizeof (block));				\
		(void) gettimeofday(&start, NULL);			\
		(void) Skein ## mode ## _Init(&ctx, diglen);		\
		for (i = 0; i < 8192; i++) {				\
			(void) Skein ## mode ## _Update(&ctx, block,	\
			    sizeof (block));				\
		}							\
		(void) Skein ## mode ## _Final(&ctx, digest);		\
		(void) gettimeofday(&end, NULL);			\
		delta = (end.tv_sec * 1000000llu + end.tv_usec) -	\
		    (start.tv_sec * 1000000llu + start.tv_usec);	\
		if (cpu_mhz != 0) {					\
			cpb = (cpu_mhz * 1e6 * ((double)delta /		\
			    1000000)) / (8192 * 128 * 1024);		\
		}							\
		(void) printf("Skein" #mode "/" #diglen "\t%llu us "	\
		    "(%.02f CPB)\n", (u_longlong_t)delta, cpb);		\
		NOTE(CONSTCOND)						\
	} while (0)

	(void) printf("Running algorithm correctness tests:\n");
	SKEIN_ALGO_TEST(test_msg0, _256, 256, skein_256_test_digests[0]);
	SKEIN_ALGO_TEST(test_msg1, _256, 256, skein_256_test_digests[1]);
	SKEIN_ALGO_TEST(test_msg2, _256, 256, skein_256_test_digests[2]);
	SKEIN_ALGO_TEST(test_msg0, _512, 512, skein_512_test_digests[0]);
	SKEIN_ALGO_TEST(test_msg2, _512, 512, skein_512_test_digests[2]);
	SKEIN_ALGO_TEST(test_msg3, _512, 512, skein_512_test_digests[3]);
	SKEIN_ALGO_TEST(test_msg0, 1024, 1024, skein_1024_test_digests[0]);
	SKEIN_ALGO_TEST(test_msg3, 1024, 1024, skein_1024_test_digests[3]);
	SKEIN_ALGO_TEST(test_msg4, 1024, 1024, skein_1024_test_digests[4]);
	if (failed)
		return (1);

	(void) printf("Running performance tests (hashing 1024 MiB of "
	    "data):\n");
	SKEIN_PERF_TEST(_256, 256);
	SKEIN_PERF_TEST(_512, 512);
	SKEIN_PERF_TEST(1024, 1024);

	return (0);
}