/* ====================================================================
 * Copyright (c) 2016 - 2018 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 <stdlib.h>
#include <string.h>
#include <libgen.h>
#include <openssl/sm9.h>
#include <openssl/err.h>
#include <openssl/objects.h>

int main(int argc, char **argv)
{
	int ret = -1;
	char *prog = basename(argv[0]);
	SM9MasterSecret *msk = NULL;
	SM9PrivateKey *sk = NULL;
	FILE *msk_fp = NULL;
	FILE *sk_fp = NULL;

	if (argc != 4) {
		printf("usage: %s <msk-file> <id> <sk-file>\n", prog);
		return -1;
	}

	if (!(msk_fp = fopen(argv[1], "r"))
		|| !(msk = d2i_SM9MasterSecret_fp(msk_fp, NULL))) {
		fprintf(stderr, "%s: read msk failed\n", prog);
		goto end;
	}

	if (!(sk = SM9_extract_private_key(msk, argv[2], strlen(argv[2])))) {
		fprintf(stderr, "%s: generate private key failed\n", prog);
		goto end;
	}

	if (!(sk_fp = fopen(argv[3], "w"))
		|| !i2d_SM9PrivateKey_fp(sk_fp, sk)) {
		fprintf(stderr, "%s: output sk file failed\n", prog);
		goto end;
	}
	printf("generate private key file '%s'\n", argv[3]);

	ret = 0;

end:
	SM9MasterSecret_free(msk);
	SM9PrivateKey_free(sk);
	fclose(msk_fp);
	fclose(sk_fp);
	return ret;
}