/* ocsp.c */

/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL

 * project 2000.

 */

/* ====================================================================

 * 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).

 *

 */

#ifndef OPENSSL_NO_OCSP

#include <stdio.h>

#include <string.h>

#include "apps.h"

#include <openssl/pem.h>

#include <openssl/ocsp.h>

#include <openssl/err.h>

#include <openssl/ssl.h>

#include <openssl/bn.h>

/* Maximum leeway in validity period: default 5 minutes */

#define MAX_VALIDITY_PERIOD	(5 * 60)

static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert, X509 *issuer,

				STACK_OF(OCSP_CERTID) *ids);

static int add_ocsp_serial(OCSP_REQUEST **req, char *serial, X509 *issuer,

				STACK_OF(OCSP_CERTID) *ids);

static int print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,

				STACK *names, STACK_OF(OCSP_CERTID) *ids,

				long nsec, long maxage);

static int make_ocsp_response(OCSP_RESPONSE **resp, OCSP_REQUEST *req, CA_DB *db,

			X509 *ca, X509 *rcert, EVP_PKEY *rkey,

			STACK_OF(X509) *rother, unsigned long flags,

			int nmin, int ndays);

static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser);

static BIO *init_responder(char *port);

static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio, char *port);

static int send_ocsp_response(BIO *cbio, OCSP_RESPONSE *resp);

#undef PROG

#define PROG ocsp_main

int MAIN(int, char **);

int MAIN(int argc, char **argv)

	{

	ENGINE *e = NULL;

	char **args;

	char *host = NULL, *port = NULL, *path = "/";

	char *reqin = NULL, *respin = NULL;

	char *reqout = NULL, *respout = NULL;

	char *signfile = NULL, *keyfile = NULL;

	char *rsignfile = NULL, *rkeyfile = NULL;

	char *outfile = NULL;

	int add_nonce = 1, noverify = 0, use_ssl = -1;

	OCSP_REQUEST *req = NULL;

	OCSP_RESPONSE *resp = NULL;

	OCSP_BASICRESP *bs = NULL;

	X509 *issuer = NULL, *cert = NULL;

	X509 *signer = NULL, *rsigner = NULL;

	EVP_PKEY *key = NULL, *rkey = NULL;

	BIO *acbio = NULL, *cbio = NULL;

	BIO *derbio = NULL;

	BIO *out = NULL;

	int req_text = 0, resp_text = 0;

	long nsec = MAX_VALIDITY_PERIOD, maxage = -1;

	char *CAfile = NULL, *CApath = NULL;

	X509_STORE *store = NULL;

	SSL_CTX *ctx = NULL;

	STACK_OF(X509) *sign_other = NULL, *verify_other = NULL, *rother = NULL;

	char *sign_certfile = NULL, *verify_certfile = NULL, *rcertfile = NULL;

	unsigned long sign_flags = 0, verify_flags = 0, rflags = 0;

	int ret = 1;

	int accept_count = -1;

	int badarg = 0;

	int i;

	int ignore_err = 0;

	STACK *reqnames = NULL;

	STACK_OF(OCSP_CERTID) *ids = NULL;

	X509 *rca_cert = NULL;

	char *ridx_filename = NULL;

	char *rca_filename = NULL;

	CA_DB *rdb = NULL;

	int nmin = 0, ndays = -1;

	if (bio_err == NULL) 

	bio_err = BIO_new_fp(stderr, BIO_NOCLOSE);

	if (!load_config(bio_err, NULL))

		goto end;

	SSL_load_error_strings();

	OpenSSL_add_ssl_algorithms();

	args = argv + 1;

	reqnames = sk_new_null();

	ids = sk_OCSP_CERTID_new_null();

	while (!badarg && *args && *args[0] == '-')

		{

		if (!strcmp(*args, "-out"))

			{

			if (args[1])

				{

				args++;

				outfile = *args;

				}

			else badarg = 1;

			}

		else if (!strcmp(*args, "-url"))

			{

			if (args[1])

				{

				args++;

				if (!OCSP_parse_url(*args, &host, &port, &path, &use_ssl))

					{

					BIO_printf(bio_err, "Error parsing URL\n");

					badarg = 1;

					}

				}

			else badarg = 1;

			}

		else if (!strcmp(*args, "-host"))

			{

			if (args[1])

				{

				args++;

				host = *args;

				}

			else badarg = 1;

			}

		else if (!strcmp(*args, "-port"))

			{

			if (args[1])

				{

				args++;

				port = *args;

				}

			else badarg = 1;

			}

		else if (!strcmp(*args, "-ignore_err"))

			ignore_err = 1;

		else if (!strcmp(*args, "-noverify"))

			noverify = 1;

		else if (!strcmp(*args, "-nonce"))

			add_nonce = 2;

		else if (!strcmp(*args, "-no_nonce"))

			add_nonce = 0;

		else if (!strcmp(*args, "-resp_no_certs"))

			rflags |= OCSP_NOCERTS;

		else if (!strcmp(*args, "-resp_key_id"))

			rflags |= OCSP_RESPID_KEY;

		else if (!strcmp(*args, "-no_certs"))

			sign_flags |= OCSP_NOCERTS;

		else if (!strcmp(*args, "-no_signature_verify"))

			verify_flags |= OCSP_NOSIGS;

		else if (!strcmp(*args, "-no_cert_verify"))

			verify_flags |= OCSP_NOVERIFY;

		else if (!strcmp(*args, "-no_chain"))

			verify_flags |= OCSP_NOCHAIN;

		else if (!strcmp(*args, "-no_cert_checks"))

			verify_flags |= OCSP_NOCHECKS;

		else if (!strcmp(*args, "-no_explicit"))

			verify_flags |= OCSP_NOEXPLICIT;

		else if (!strcmp(*args, "-trust_other"))

			verify_flags |= OCSP_TRUSTOTHER;

		else if (!strcmp(*args, "-no_intern"))

			verify_flags |= OCSP_NOINTERN;

		else if (!strcmp(*args, "-text"))

			{

			req_text = 1;

			resp_text = 1;

			}

		else if (!strcmp(*args, "-req_text"))

			req_text = 1;

		else if (!strcmp(*args, "-resp_text"))

			resp_text = 1;

		else if (!strcmp(*args, "-reqin"))

			{

			if (args[1])

				{

				args++;

				reqin = *args;

				}

			else badarg = 1;

			}

		else if (!strcmp(*args, "-respin"))

			{

			if (args[1])

				{

				args++;

				respin = *args;

				}

			else badarg = 1;

			}

		else if (!strcmp(*args, "-signer"))

			{

			if (args[1])

				{

				args++;

				signfile = *args;

				}

			else badarg = 1;

			}

		else if (!strcmp (*args, "-VAfile"))

			{

			if (args[1])

				{

				args++;

				verify_certfile = *args;

				verify_flags |= OCSP_TRUSTOTHER;

				}

			else badarg = 1;

			}

		else if (!strcmp(*args, "-sign_other"))

			{

			if (args[1])

				{

				args++;

				sign_certfile = *args;

				}

			else badarg = 1;

			}

		else if (!strcmp(*args, "-verify_other"))

			{

			if (args[1])

				{

				args++;

				verify_certfile = *args;

				}

			else badarg = 1;

			}

		else if (!strcmp (*args, "-CAfile"))

			{

			if (args[1])

				{

				args++;

				CAfile = *args;

				}

			else badarg = 1;

			}

		else if (!strcmp (*args, "-CApath"))

			{

			if (args[1])

				{

				args++;

				CApath = *args;

				}

			else badarg = 1;

			}

		else if (!strcmp (*args, "-validity_period"))

			{

			if (args[1])

				{

				args++;

				nsec = atol(*args);

				if (nsec < 0)

					{

					BIO_printf(bio_err,

						"Illegal validity period %s\n",

						*args);

					badarg = 1;

					}

				}

			else badarg = 1;

			}

		else if (!strcmp (*args, "-status_age"))

			{

			if (args[1])

				{

				args++;

				maxage = atol(*args);

				if (maxage < 0)

					{

					BIO_printf(bio_err,

						"Illegal validity age %s\n",

						*args);

					badarg = 1;

					}

				}

			else badarg = 1;

			}

		 else if (!strcmp(*args, "-signkey"))

			{

			if (args[1])

				{

				args++;

				keyfile = *args;

				}

			else badarg = 1;

			}

		else if (!strcmp(*args, "-reqout"))

			{

			if (args[1])

				{

				args++;

				reqout = *args;

				}

			else badarg = 1;

			}

		else if (!strcmp(*args, "-respout"))

			{

			if (args[1])

				{

				args++;

				respout = *args;

				}

			else badarg = 1;

			}

		 else if (!strcmp(*args, "-path"))

			{

			if (args[1])

				{

				args++;

				path = *args;

				}

			else badarg = 1;

			}

		else if (!strcmp(*args, "-issuer"))

			{

			if (args[1])

				{

				args++;

				X509_free(issuer);

				issuer = load_cert(bio_err, *args, FORMAT_PEM,

					NULL, e, "issuer certificate");

				if(!issuer) goto end;

				}

			else badarg = 1;

			}

		else if (!strcmp (*args, "-cert"))

			{

			if (args[1])

				{

				args++;

				X509_free(cert);

				cert = load_cert(bio_err, *args, FORMAT_PEM,

					NULL, e, "certificate");

				if(!cert) goto end;

				if(!add_ocsp_cert(&req, cert, issuer, ids))

					goto end;

				if(!sk_push(reqnames, *args))

					goto end;

				}

			else badarg = 1;

			}

		else if (!strcmp(*args, "-serial"))

			{

			if (args[1])

				{

				args++;

				if(!add_ocsp_serial(&req, *args, issuer, ids))

					goto end;

				if(!sk_push(reqnames, *args))

					goto end;

				}

			else badarg = 1;

			}

		else if (!strcmp(*args, "-index"))

			{

			if (args[1])

				{

				args++;

				ridx_filename = *args;

				}

			else badarg = 1;

			}

		else if (!strcmp(*args, "-CA"))

			{

			if (args[1])

				{

				args++;

				rca_filename = *args;

				}

			else badarg = 1;

			}

		else if (!strcmp (*args, "-nmin"))

			{

			if (args[1])

				{

				args++;

				nmin = atol(*args);

				if (nmin < 0)

					{

					BIO_printf(bio_err,

						"Illegal update period %s\n",

						*args);

					badarg = 1;

					}

				}

				if (ndays == -1)

					ndays = 0;

			else badarg = 1;

			}

		else if (!strcmp (*args, "-nrequest"))

			{

			if (args[1])

				{

				args++;

				accept_count = atol(*args);

				if (accept_count < 0)

					{

					BIO_printf(bio_err,

						"Illegal accept count %s\n",

						*args);

					badarg = 1;

					}

				}

			else badarg = 1;

			}

		else if (!strcmp (*args, "-ndays"))

			{

			if (args[1])

				{

				args++;

				ndays = atol(*args);

				if (ndays < 0)

					{

					BIO_printf(bio_err,

						"Illegal update period %s\n",

						*args);

					badarg = 1;

					}

				}

			else badarg = 1;

			}

		else if (!strcmp(*args, "-rsigner"))

			{

			if (args[1])

				{

				args++;

				rsignfile = *args;

				}

			else badarg = 1;

			}

		else if (!strcmp(*args, "-rkey"))

			{

			if (args[1])

				{

				args++;

				rkeyfile = *args;

				}

			else badarg = 1;

			}

		else if (!strcmp(*args, "-rother"))

			{

			if (args[1])

				{

				args++;

				rcertfile = *args;

				}

			else badarg = 1;

			}

		else badarg = 1;

		args++;

		}

	/* Have we anything to do? */

	if (!req && !reqin && !respin && !(port && ridx_filename)) badarg = 1;

	if (badarg)

		{

		BIO_printf (bio_err, "OCSP utility\n");

		BIO_printf (bio_err, "Usage ocsp [options]\n");

		BIO_printf (bio_err, "where options are\n");

		BIO_printf (bio_err, "-out file          output filename\n");

		BIO_printf (bio_err, "-issuer file       issuer certificate\n");

		BIO_printf (bio_err, "-cert file         certificate to check\n");

		BIO_printf (bio_err, "-serial n          serial number to check\n");

		BIO_printf (bio_err, "-signer file       certificate to sign OCSP request with\n");

		BIO_printf (bio_err, "-signkey file      private key to sign OCSP request with\n");

		BIO_printf (bio_err, "-sign_other file   additional certificates to include in signed request\n");

		BIO_printf (bio_err, "-no_certs          don't include any certificates in signed request\n");

		BIO_printf (bio_err, "-req_text          print text form of request\n");

		BIO_printf (bio_err, "-resp_text         print text form of response\n");

		BIO_printf (bio_err, "-text              print text form of request and response\n");

		BIO_printf (bio_err, "-reqout file       write DER encoded OCSP request to \"file\"\n");

		BIO_printf (bio_err, "-respout file      write DER encoded OCSP reponse to \"file\"\n");

		BIO_printf (bio_err, "-reqin file        read DER encoded OCSP request from \"file\"\n");

		BIO_printf (bio_err, "-respin file       read DER encoded OCSP reponse from \"file\"\n");

		BIO_printf (bio_err, "-nonce             add OCSP nonce to request\n");

		BIO_printf (bio_err, "-no_nonce          don't add OCSP nonce to request\n");