Return to spkac.c CVS log

Up to [local] / src / usr.bin / openssl

Rename struct ${app}_config to plain cfg

All the structs are static and we need to reach into them many times.
Having a shorter name is more concise and results in less visual clutter.
It also avoids many overlong lines and we will be able to get rid of some
unfortunate line wrapping down the road.

Discussed with jsing

/* $OpenBSD: spkac.c,v 1.13 2023/03/06 14:32:06 tb Exp $ */
/* 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 "progs.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>

static struct {
	char *challenge;
	char *infile;
	char *keyfile;
	int noout;
	char *outfile;
	char *passargin;
	int pubkey;
	char *spkac;
	char *spksect;
	int verify;
} cfg;

static const struct option spkac_options[] = {
	{
		.name = "challenge",
		.argname = "string",
		.desc = "Specify challenge string if SPKAC is generated",
		.type = OPTION_ARG,
		.opt.arg = &cfg.challenge,
	},
	{
		.name = "in",
		.argname = "file",
		.desc = "Input file (default stdin)",
		.type = OPTION_ARG,
		.opt.arg = &cfg.infile,
	},
	{
		.name = "key",
		.argname = "file",
		.desc = "Create SPKAC using private key file",
		.type = OPTION_ARG,
		.opt.arg = &cfg.keyfile,
	},
	{
		.name = "noout",
		.desc = "Do not print text version of SPKAC",
		.type = OPTION_FLAG,
		.opt.flag = &cfg.noout,
	},
	{
		.name = "out",
		.argname = "file",
		.desc = "Output file (default stdout)",
		.type = OPTION_ARG,
		.opt.arg = &cfg.outfile,
	},
	{
		.name = "passin",
		.argname = "src",
		.desc = "Input file passphrase source",
		.type = OPTION_ARG,
		.opt.arg = &cfg.passargin,
	},
	{
		.name = "pubkey",
		.desc = "Output public key of an SPKAC (not used if creating)",
		.type = OPTION_FLAG,
		.opt.flag = &cfg.pubkey,
	},
	{
		.name = "spkac",
		.argname = "name",
		.desc = "SPKAC name (default \"SPKAC\")",
		.type = OPTION_ARG,
		.opt.arg = &cfg.spkac,
	},
	{
		.name = "spksect",
		.argname = "name",
		.desc = "Name of the section containing SPKAC (default"
		" \"default\")",
		.type = OPTION_ARG,
		.opt.arg = &cfg.spksect,
	},
	{
		.name = "verify",
		.desc = "Verify digital signature on supplied SPKAC",
		.type = OPTION_FLAG,
		.opt.flag = &cfg.verify,
	},
	{ NULL }
};

static void
spkac_usage(void)
{
	fprintf(stderr,
	    "usage: spkac [-challenge string] [-in file] "
	    "[-key file] [-noout]\n"
	    "    [-out file] [-passin src] [-pubkey] [-spkac name] "
	    "[-spksect section]\n"
	    "    [-verify]\n\n");
	options_usage(spkac_options);
}

int
spkac_main(int argc, char **argv)
{
	int i, ret = 1;
	BIO *in = NULL, *out = NULL;
	char *passin = NULL;
	char *spkstr = NULL;
	CONF *conf = NULL;
	NETSCAPE_SPKI *spki = NULL;
	EVP_PKEY *pkey = NULL;

	if (pledge("stdio cpath wpath rpath tty", NULL) == -1) {
		perror("pledge");
		exit(1);
	}

	memset(&cfg, 0, sizeof(cfg));
	cfg.spkac = "SPKAC";
	cfg.spksect = "default";

	if (options_parse(argc, argv, spkac_options, NULL, NULL) != 0) {
		spkac_usage();
		return (1);
	}

	if (!app_passwd(bio_err, cfg.passargin, NULL, &passin, NULL)) {
		BIO_printf(bio_err, "Error getting password\n");
		goto end;
	}

	if (cfg.keyfile) {
		pkey = load_key(bio_err,
		    strcmp(cfg.keyfile, "-") ? cfg.keyfile
		    : NULL, FORMAT_PEM, 1, passin, "private key");
		if (!pkey) {
			goto end;
		}
		spki = NETSCAPE_SPKI_new();
		if (cfg.challenge)
			ASN1_STRING_set(spki->spkac->challenge,
			    cfg.challenge,
			    (int) strlen(cfg.challenge));
		NETSCAPE_SPKI_set_pubkey(spki, pkey);
		NETSCAPE_SPKI_sign(spki, pkey, EVP_md5());
		spkstr = NETSCAPE_SPKI_b64_encode(spki);
		if (spkstr == NULL) {
			BIO_printf(bio_err, "Error encoding SPKAC\n");
			ERR_print_errors(bio_err);
			goto end;
		}

		if (cfg.outfile)
			out = BIO_new_file(cfg.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);
		} else {
			BIO_printf(out, "SPKAC=%s\n", spkstr);
			ret = 0;
		}
		free(spkstr);
		goto end;
	}
	if (cfg.infile)
		in = BIO_new_file(cfg.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, cfg.spksect,
	    cfg.spkac);

	if (!spkstr) {
		BIO_printf(bio_err, "Can't find SPKAC called \"%s\"\n",
		    cfg.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 (cfg.outfile)
		out = BIO_new_file(cfg.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 (!cfg.noout)
		NETSCAPE_SPKI_print(out, spki);
	pkey = NETSCAPE_SPKI_get_pubkey(spki);
	if (cfg.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 (cfg.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);
}