/* apps/spkac.c */

/* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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/x509.h>

#include <openssl/pem.h>

#undef PROG

#define PROG	spkac_main

/* -in arg	- input file - default stdin

 * -out arg	- output file - default stdout

 */

int MAIN(int, char **);

int 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

	apps_startup();

	if (!bio_err)

	bio_err = BIO_new_fp(stderr, BIO_NOCLOSE);

	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);

#ifdef OPENSSL_SYS_VMS

			{

			    BIO *tmpbio = BIO_new(BIO_f_linebuffer());

			    out = BIO_push(tmpbio, out);

			}

#endif

		}

		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);

		OPENSSL_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);

#ifdef OPENSSL_SYS_VMS

		{

		    BIO *tmpbio = BIO_new(BIO_f_linebuffer());

		    out = BIO_push(tmpbio, out);

		}

#endif

	}

	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) 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);

	if(passin) OPENSSL_free(passin);

	apps_shutdown();

	OPENSSL_EXIT(ret);

	}