/* crypto/rand/randtest.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

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

#undef LIBRESSL_INTERNAL	/* Needed to get RAND_pseudo_bytes(). */
#include <openssl/rand.h>

/* some FIPS 140-1 random number test */
/* some simple tests */

int main(int argc,char **argv)
	{
	unsigned char buf[2500];
	int i,j,k,s,sign,nsign,err=0;
	unsigned long n1;
	unsigned long n2[16];
	unsigned long runs[2][34];
	/*double d; */
	long d;

	i = RAND_pseudo_bytes(buf,2500);
	if (i < 0)
		{
		printf ("init failed, the rand method is not properly installed\n");
		err++;
		goto err;
		}

	n1=0;
	for (i=0; i<16; i++) n2[i]=0;
	for (i=0; i<34; i++) runs[0][i]=runs[1][i]=0;

	/* test 1 and 2 */
	sign=0;
	nsign=0;
	for (i=0; i<2500; i++)
		{
		j=buf[i];

		n2[j&0x0f]++;
		n2[(j>>4)&0x0f]++;

		for (k=0; k<8; k++)
			{
			s=(j&0x01);
			if (s == sign)
				nsign++;
			else
				{
				if (nsign > 34) nsign=34;
				if (nsign != 0)
					{
					runs[sign][nsign-1]++;
					if (nsign > 6)
						runs[sign][5]++;
					}
				sign=s;
				nsign=1;
				}

			if (s) n1++;
			j>>=1;
			}
		}
		if (nsign > 34) nsign=34;
		if (nsign != 0) runs[sign][nsign-1]++;

	/* test 1 */
	if (!((9654 < n1) && (n1 < 10346)))
		{
		printf("test 1 failed, X=%lu\n",n1);
		err++;
		}
	printf("test 1 done\n");

	/* test 2 */
	d=0;
	for (i=0; i<16; i++)
		d+=n2[i]*n2[i];
	d=(d*8)/25-500000;
	if (!((103 < d) && (d < 5740)))
		{
		printf("test 2 failed, X=%ld.%02ld\n",d/100L,d%100L);
		err++;
		}
	printf("test 2 done\n");

	/* test 3 */
	for (i=0; i<2; i++)
		{
		if (!((2267 < runs[i][0]) && (runs[i][0] < 2733)))
			{
			printf("test 3 failed, bit=%d run=%d num=%lu\n",
				i,1,runs[i][0]);
			err++;
			}
		if (!((1079 < runs[i][1]) && (runs[i][1] < 1421)))
			{
			printf("test 3 failed, bit=%d run=%d num=%lu\n",
				i,2,runs[i][1]);
			err++;
			}
		if (!(( 502 < runs[i][2]) && (runs[i][2] <  748)))
			{
			printf("test 3 failed, bit=%d run=%d num=%lu\n",
				i,3,runs[i][2]);
			err++;
			}
		if (!(( 223 < runs[i][3]) && (runs[i][3] <  402)))
			{
			printf("test 3 failed, bit=%d run=%d num=%lu\n",
				i,4,runs[i][3]);
			err++;
			}
		if (!((  90 < runs[i][4]) && (runs[i][4] <  223)))
			{
			printf("test 3 failed, bit=%d run=%d num=%lu\n",
				i,5,runs[i][4]);
			err++;
			}
		if (!((  90 < runs[i][5]) && (runs[i][5] <  223)))
			{
			printf("test 3 failed, bit=%d run=%d num=%lu\n",
				i,6,runs[i][5]);
			err++;
			}
		}
	printf("test 3 done\n");
	
	/* test 4 */
	if (runs[0][33] != 0)
		{
		printf("test 4 failed, bit=%d run=%d num=%lu\n",
			0,34,runs[0][33]);
		err++;
		}
	if (runs[1][33] != 0)
		{
		printf("test 4 failed, bit=%d run=%d num=%lu\n",
			1,34,runs[1][33]);
		err++;
		}
	printf("test 4 done\n");
 err:
	err=((err)?1:0);
	exit(err);
	}
