/* 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;

 	}