/* $OpenBSD$ */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
 * project 1999. Based on an original idea by Massimiliano Pala
 * (madwolf@openca.org).
 */
/* ====================================================================
 * Copyright (c) 1999 The OpenSSL 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 OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    licensing@OpenSSL.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL 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 OpenSSL 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.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

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

#include "apps.h"

#include <openssl/bio.h>
#include <openssl/conf.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/lhash.h>
#include <openssl/pem.h>
#include <openssl/x509.h>

/* -in arg	- input file - default stdin
 * -out arg	- output file - default stdout
 */

int spkac_main(int, char **);

int 
spkac_main(int argc, char **argv)
{
	ENGINE *e = NULL;
	int i, badops = 0, ret = 1;
	BIO *in = NULL, *out = NULL;
	int verify = 0, noout = 0, pubkey = 0;
	char *infile = NULL, *outfile = NULL, *prog;
	char *passargin = NULL, *passin = NULL;
	const char *spkac = "SPKAC", *spksect = "default";
	char *spkstr = NULL;
	char *challenge = NULL, *keyfile = NULL;
	CONF *conf = NULL;
	NETSCAPE_SPKI *spki = NULL;
	EVP_PKEY *pkey = NULL;
#ifndef OPENSSL_NO_ENGINE
	char *engine = NULL;
#endif

	if (!load_config(bio_err, NULL))
		goto end;

	prog = argv[0];
	argc--;
	argv++;
	while (argc >= 1) {
		if (strcmp(*argv, "-in") == 0) {
			if (--argc < 1)
				goto bad;
			infile = *(++argv);
		} else if (strcmp(*argv, "-out") == 0) {
			if (--argc < 1)
				goto bad;
			outfile = *(++argv);
		} else if (strcmp(*argv, "-passin") == 0) {
			if (--argc < 1)
				goto bad;
			passargin = *(++argv);
		} else if (strcmp(*argv, "-key") == 0) {
			if (--argc < 1)
				goto bad;
			keyfile = *(++argv);
		} else if (strcmp(*argv, "-challenge") == 0) {
			if (--argc < 1)
				goto bad;
			challenge = *(++argv);
		} else if (strcmp(*argv, "-spkac") == 0) {
			if (--argc < 1)
				goto bad;
			spkac = *(++argv);
		} else if (strcmp(*argv, "-spksect") == 0) {
			if (--argc < 1)
				goto bad;
			spksect = *(++argv);
		}
#ifndef OPENSSL_NO_ENGINE
		else if (strcmp(*argv, "-engine") == 0) {
			if (--argc < 1)
				goto bad;
			engine = *(++argv);
		}
#endif
		else if (strcmp(*argv, "-noout") == 0)
			noout = 1;
		else if (strcmp(*argv, "-pubkey") == 0)
			pubkey = 1;
		else if (strcmp(*argv, "-verify") == 0)
			verify = 1;
		else
			badops = 1;
		argc--;
		argv++;
	}

	if (badops) {
bad:
		BIO_printf(bio_err, "%s [options]\n", prog);
		BIO_printf(bio_err, "where options are\n");
		BIO_printf(bio_err, " -in arg        input file\n");
		BIO_printf(bio_err, " -out arg       output file\n");
		BIO_printf(bio_err, " -key arg       create SPKAC using private key\n");
		BIO_printf(bio_err, " -passin arg    input file pass phrase source\n");
		BIO_printf(bio_err, " -challenge arg challenge string\n");
		BIO_printf(bio_err, " -spkac arg     alternative SPKAC name\n");
		BIO_printf(bio_err, " -noout         don't print SPKAC\n");
		BIO_printf(bio_err, " -pubkey        output public key\n");
		BIO_printf(bio_err, " -verify        verify SPKAC signature\n");
#ifndef OPENSSL_NO_ENGINE
		BIO_printf(bio_err, " -engine e      use engine e, possibly a hardware device.\n");
#endif
		goto end;
	}
	ERR_load_crypto_strings();
	if (!app_passwd(bio_err, passargin, NULL, &passin, NULL)) {
		BIO_printf(bio_err, "Error getting password\n");
		goto end;
	}
#ifndef OPENSSL_NO_ENGINE
	e = setup_engine(bio_err, engine, 0);
#endif

	if (keyfile) {
		pkey = load_key(bio_err,
		    strcmp(keyfile, "-") ? keyfile : NULL,
		    FORMAT_PEM, 1, passin, e, "private key");
		if (!pkey) {
			goto end;
		}
		spki = NETSCAPE_SPKI_new();
		if (challenge)
			ASN1_STRING_set(spki->spkac->challenge,
			    challenge, (int) strlen(challenge));
		NETSCAPE_SPKI_set_pubkey(spki, pkey);
		NETSCAPE_SPKI_sign(spki, pkey, EVP_md5());
		spkstr = NETSCAPE_SPKI_b64_encode(spki);

		if (outfile)
			out = BIO_new_file(outfile, "w");
		else {
			out = BIO_new_fp(stdout, BIO_NOCLOSE);
		}

		if (!out) {
			BIO_printf(bio_err, "Error opening output file\n");
			ERR_print_errors(bio_err);
			goto end;
		}
		BIO_printf(out, "SPKAC=%s\n", spkstr);
		free(spkstr);
		ret = 0;
		goto end;
	}
	if (infile)
		in = BIO_new_file(infile, "r");
	else
		in = BIO_new_fp(stdin, BIO_NOCLOSE);

	if (!in) {
		BIO_printf(bio_err, "Error opening input file\n");
		ERR_print_errors(bio_err);
		goto end;
	}
	conf = NCONF_new(NULL);
	i = NCONF_load_bio(conf, in, NULL);

	if (!i) {
		BIO_printf(bio_err, "Error parsing config file\n");
		ERR_print_errors(bio_err);
		goto end;
	}
	spkstr = NCONF_get_string(conf, spksect, spkac);

	if (!spkstr) {
		BIO_printf(bio_err, "Can't find SPKAC called \"%s\"\n", spkac);
		ERR_print_errors(bio_err);
		goto end;
	}
	spki = NETSCAPE_SPKI_b64_decode(spkstr, -1);

	if (!spki) {
		BIO_printf(bio_err, "Error loading SPKAC\n");
		ERR_print_errors(bio_err);
		goto end;
	}
	if (outfile)
		out = BIO_new_file(outfile, "w");
	else {
		out = BIO_new_fp(stdout, BIO_NOCLOSE);
	}

	if (!out) {
		BIO_printf(bio_err, "Error opening output file\n");
		ERR_print_errors(bio_err);
		goto end;
	}
	if (!noout)
		NETSCAPE_SPKI_print(out, spki);
	pkey = NETSCAPE_SPKI_get_pubkey(spki);
	if (verify) {
		i = NETSCAPE_SPKI_verify(spki, pkey);
		if (i > 0)
			BIO_printf(bio_err, "Signature OK\n");
		else {
			BIO_printf(bio_err, "Signature Failure\n");
			ERR_print_errors(bio_err);
			goto end;
		}
	}
	if (pubkey)
		PEM_write_bio_PUBKEY(out, pkey);

	ret = 0;

end:
	NCONF_free(conf);
	NETSCAPE_SPKI_free(spki);
	BIO_free(in);
	BIO_free_all(out);
	EVP_PKEY_free(pkey);
	free(passin);
	
	return (ret);
}