/*
 * Copyright (c) 2014 - 2020 The GmSSL Project.  All rights reserved.
 *
 * 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 above 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 acknowledgment:
 *    "This product includes software developed by the GmSSL Project.
 *    (http://gmssl.org/)"
 *
 * 4. The name "GmSSL Project" must not be used to endorse or promote
 *    products derived from this software without prior written
 *    permission. For written permission, please contact
 *    guanzhi1980@gmail.com.
 *
 * 5. Products derived from this software may not be called "GmSSL"
 *    nor may "GmSSL" appear in their names without prior written
 *    permission of the GmSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the GmSSL Project
 *    (http://gmssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE GmSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED 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 GmSSL PROJECT OR
 * ITS 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.
 */

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <gmssl/hex.h>
#include <gmssl/digest.h>
#include <gmssl/hash_drbg.h>


#define EntropyInput "212956390783381dbfc6362dd0da9a09"
#define Nonce "5280987fc5e27a49"
#define PersonalizationString ""
#define AdditionalInput	""
#define V0 "02b84eba8121ca090b6b66d3371609eaf76405a5c2807d80035c1a13dfed5aa18e536af599a7b3c68b2c56240ed11997f4048910d84604"
#define C0 "a677e4921587563eebe55d1b25e59c3f3d200bc61aaee665e7a6858c2857c45dba4bce8182252962ae86de491046a5e3450eec44938a0a"

#define AdditionalInput1 ""
#define EntropyInputPR1 "2edb396eeb8960f77943c2a59075a786"
#define V1 "f9afadfbbf2c3d1004f9baca38be247342e5fbb83281915d5de18beb963712a344e89bb0e6b925a7bbc32eadb8b441efc1fa0c649df42a"
#define C1 "1d41cbbd634909e4761c232fcfd6a6c2edf0a7f4d3d3c164f74a88955f355efce2d86c1e9fa897b7005ef9d4d3a51bf4fc0b805ab896c9"


int main(void)
{
	HASH_DRBG drbg;

	unsigned char *entropy = NULL;
	unsigned char *nonce = NULL;
	unsigned char *personalstr = NULL;
	unsigned char *v = NULL;
	unsigned char *c = NULL;
	size_t entropy_len, nonce_len, personalstr_len, vlen, clen;


	unsigned char *entropy_pr1 = NULL;
	size_t entropy_pr1len;

	unsigned char out[640/8];

	entropy = OPENSSL_hexstr2buf(EntropyInput, &entropy_len);
	nonce = OPENSSL_hexstr2buf(Nonce, &nonce_len);
	personalstr = OPENSSL_hexstr2buf(PersonalizationString, &personalstr_len);
	v = OPENSSL_hexstr2buf(V0, &vlen);
	c = OPENSSL_hexstr2buf(C0, &clen);

	entropy_pr1 = OPENSSL_hexstr2buf(EntropyInputPR1, &entropy_pr1len);


	hash_drbg_init(&drbg, DIGEST_sha1(),
		entropy, entropy_len,
		nonce, nonce_len,
		personalstr, personalstr_len);

	printf("sha1_drbg test 1 ");
	if (drbg.seedlen != vlen
		|| memcmp(drbg.V, v, vlen) != 0
		|| memcmp(drbg.C, c, clen) != 0
		|| drbg.reseed_counter != 1) {
		printf("failed\n");
	} else {
		printf("ok\n");
	}

	unsigned char *pr1 = NULL;
	unsigned char *pr2 = NULL;
	size_t pr1_len, pr2_len;

	pr1 = OPENSSL_hexstr2buf("2edb396eeb8960f77943c2a59075a786", &pr1_len);
	pr2 = OPENSSL_hexstr2buf("30b565b63a5012676940d3ef17d9e996", &pr2_len);

	hash_drbg_reseed(&drbg, pr1, pr1_len, NULL, 0);
	hash_drbg_generate(&drbg, NULL, 0, 640/8, out);

	hash_drbg_reseed(&drbg, pr2, pr2_len, NULL, 0);
	hash_drbg_generate(&drbg, NULL, 0, 640/8, out);

	int i;
	for (i = 0; i < sizeof(out); i++) {
		printf("%02x", out[i]);
	}
	printf("\n");

	return 0;
}