/* ocsp_lib.c */

/* Written by Tom Titchener <Tom_Titchener@groove.net> for the OpenSSL

 * project. */

/* History:

   This file was transfered to Richard Levitte from CertCo by Kathy

   Weinhold in mid-spring 2000 to be included in OpenSSL or released

   as a patch kit. */

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

 * Copyright (c) 1998-2000 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

 *    openssl-core@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 <cryptlib.h>

#include <openssl/objects.h>

#include <openssl/rand.h>

#include <openssl/x509.h>

#include <openssl/pem.h>

#include <openssl/x509v3.h>

#include <openssl/ocsp.h>

/* Convert a certificate and its issuer to an OCSP_CERTID */

EXPORT_C OCSP_CERTID *OCSP_cert_to_id(const EVP_MD *dgst, X509 *subject, X509 *issuer)

{

	X509_NAME *iname;

	ASN1_INTEGER *serial;

	ASN1_BIT_STRING *ikey;

#ifndef OPENSSL_NO_SHA1

	if(!dgst) dgst = EVP_sha1();

#endif

	if (subject)

		{

		iname = X509_get_issuer_name(subject);

		serial = X509_get_serialNumber(subject);

		}

	else

		{

		iname = X509_get_subject_name(issuer);

		serial = NULL;

		}

	ikey = X509_get0_pubkey_bitstr(issuer);

	return OCSP_cert_id_new(dgst, iname, ikey, serial);

}

EXPORT_C OCSP_CERTID *OCSP_cert_id_new(const EVP_MD *dgst, 

			      X509_NAME *issuerName, 

			      ASN1_BIT_STRING* issuerKey, 

			      ASN1_INTEGER *serialNumber)

        {

	int nid;

        unsigned int i;

	X509_ALGOR *alg;

	OCSP_CERTID *cid = NULL;

	unsigned char md[EVP_MAX_MD_SIZE];

	if (!(cid = OCSP_CERTID_new())) goto err;

	alg = cid->hashAlgorithm;

	if (alg->algorithm != NULL) ASN1_OBJECT_free(alg->algorithm);

	if ((nid = EVP_MD_type(dgst)) == NID_undef)

	        {

		OCSPerr(OCSP_F_OCSP_CERT_ID_NEW,OCSP_R_UNKNOWN_NID);

		goto err;

		}

	if (!(alg->algorithm=OBJ_nid2obj(nid))) goto err;

	if ((alg->parameter=ASN1_TYPE_new()) == NULL) goto err;

	alg->parameter->type=V_ASN1_NULL;

	if (!X509_NAME_digest(issuerName, dgst, md, &i)) goto digerr;

	if (!(ASN1_OCTET_STRING_set(cid->issuerNameHash, md, i))) goto err;

	/* Calculate the issuerKey hash, excluding tag and length */

	EVP_Digest(issuerKey->data, issuerKey->length, md, &i, dgst, NULL);

	if (!(ASN1_OCTET_STRING_set(cid->issuerKeyHash, md, i))) goto err;

	if (serialNumber)

		{

		ASN1_INTEGER_free(cid->serialNumber);

		if (!(cid->serialNumber = ASN1_INTEGER_dup(serialNumber))) goto err;

		}

	return cid;

digerr:

	OCSPerr(OCSP_F_OCSP_CERT_ID_NEW,OCSP_R_DIGEST_ERR);

err:

	if (cid) OCSP_CERTID_free(cid);

	return NULL;

	}

EXPORT_C int OCSP_id_issuer_cmp(OCSP_CERTID *a, OCSP_CERTID *b)

	{

	int ret;

	ret = OBJ_cmp(a->hashAlgorithm->algorithm, b->hashAlgorithm->algorithm);

	if (ret) return ret;

	ret = ASN1_OCTET_STRING_cmp(a->issuerNameHash, b->issuerNameHash);

	if (ret) return ret;

	return ASN1_OCTET_STRING_cmp(a->issuerKeyHash, b->issuerKeyHash);

	}

EXPORT_C int OCSP_id_cmp(OCSP_CERTID *a, OCSP_CERTID *b)

	{

	int ret;

	ret = OCSP_id_issuer_cmp(a, b);

	if (ret) return ret;

	return ASN1_INTEGER_cmp(a->serialNumber, b->serialNumber);

	}

/* Parse a URL and split it up into host, port and path components and whether

 * it is SSL.

 */

EXPORT_C int OCSP_parse_url(char *url, char **phost, char **pport, char **ppath, int *pssl)

	{

	char *p, *buf;

	char *host, *port;

	/* dup the buffer since we are going to mess with it */

	buf = BUF_strdup(url);

	if (!buf) goto mem_err;

	*phost = NULL;

	*pport = NULL;

	*ppath = NULL;

	/* Check for initial colon */

	p = strchr(buf, ':');

	if (!p) goto parse_err;

	*(p++) = '\0';

	if (!strcmp(buf, "http"))

		{

		*pssl = 0;

		port = "80";

		}

	else if (!strcmp(buf, "https"))

		{

		*pssl = 1;

		port = "443";

		}

	else

		goto parse_err;

	/* Check for double slash */

	if ((p[0] != '/') || (p[1] != '/'))

		goto parse_err;

	p += 2;

	host = p;

	/* Check for trailing part of path */

	p = strchr(p, '/');

	if (!p) 

		*ppath = BUF_strdup("/");

	else

		{

		*ppath = BUF_strdup(p);

		/* Set start of path to 0 so hostname is valid */

		*p = '\0';

		}

	if (!*ppath) goto mem_err;

	/* Look for optional ':' for port number */

	if ((p = strchr(host, ':')))

		{

		*p = 0;

		port = p + 1;

		}

	else

		{

		/* Not found: set default port */

		if (*pssl) port = "443";

		else port = "80";

		}

	*pport = BUF_strdup(port);

	if (!*pport) goto mem_err;

	*phost = BUF_strdup(host);

	if (!*phost) goto mem_err;

	OPENSSL_free(buf);

	return 1;

	mem_err:

	OCSPerr(OCSP_F_OCSP_PARSE_URL, ERR_R_MALLOC_FAILURE);

	goto err;

	parse_err:

	OCSPerr(OCSP_F_OCSP_PARSE_URL, OCSP_R_ERROR_PARSING_URL);

	err:

	if (buf) OPENSSL_free(buf);

	if (*ppath) OPENSSL_free(*ppath);

	if (*pport) OPENSSL_free(*pport);

	if (*phost) OPENSSL_free(*phost);

	return 0;

	}