/* ocsp_srv.c */

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

 * project 2001.

 */

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

 * Copyright (c) 1998-2001 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>

/* Utility functions related to sending OCSP responses and extracting

 * relevant information from the request.

 */

EXPORT_C int OCSP_request_onereq_count(OCSP_REQUEST *req)

	{

	return sk_OCSP_ONEREQ_num(req->tbsRequest->requestList);

	}

EXPORT_C OCSP_ONEREQ *OCSP_request_onereq_get0(OCSP_REQUEST *req, int i)

	{

	return sk_OCSP_ONEREQ_value(req->tbsRequest->requestList, i);

	}

EXPORT_C OCSP_CERTID *OCSP_onereq_get0_id(OCSP_ONEREQ *one)

	{

	return one->reqCert;

	}

EXPORT_C int OCSP_id_get0_info(ASN1_OCTET_STRING **piNameHash, ASN1_OBJECT **pmd,

			ASN1_OCTET_STRING **pikeyHash,

			ASN1_INTEGER **pserial, OCSP_CERTID *cid)

	{

	if (!cid) return 0;

	if (pmd) *pmd = cid->hashAlgorithm->algorithm;

	if(piNameHash) *piNameHash = cid->issuerNameHash;

	if (pikeyHash) *pikeyHash = cid->issuerKeyHash;

	if (pserial) *pserial = cid->serialNumber;

	return 1;

	}

EXPORT_C int OCSP_request_is_signed(OCSP_REQUEST *req)

	{

	if(req->optionalSignature) return 1;

	return 0;

	}

/* Create an OCSP response and encode an optional basic response */

EXPORT_C OCSP_RESPONSE *OCSP_response_create(int status, OCSP_BASICRESP *bs)

        {

        OCSP_RESPONSE *rsp = NULL;

	if (!(rsp = OCSP_RESPONSE_new())) goto err;

	if (!(ASN1_ENUMERATED_set(rsp->responseStatus, status))) goto err;

	if (!bs) return rsp;

	if (!(rsp->responseBytes = OCSP_RESPBYTES_new())) goto err;

	rsp->responseBytes->responseType = OBJ_nid2obj(NID_id_pkix_OCSP_basic);

	if (!ASN1_item_pack(bs, ASN1_ITEM_rptr(OCSP_BASICRESP), &rsp->responseBytes->response))

				goto err;

	return rsp;

err:

	if (rsp) OCSP_RESPONSE_free(rsp);

	return NULL;

	}

EXPORT_C OCSP_SINGLERESP *OCSP_basic_add1_status(OCSP_BASICRESP *rsp,

						OCSP_CERTID *cid,

						int status, int reason,

						ASN1_TIME *revtime,

					ASN1_TIME *thisupd, ASN1_TIME *nextupd)

	{

	OCSP_SINGLERESP *single = NULL;

	OCSP_CERTSTATUS *cs;

	OCSP_REVOKEDINFO *ri;

	if(!rsp->tbsResponseData->responses &&

	    !(rsp->tbsResponseData->responses = sk_OCSP_SINGLERESP_new_null()))

		goto err;

	if (!(single = OCSP_SINGLERESP_new()))

		goto err;

	if (!ASN1_TIME_to_generalizedtime(thisupd, &single->thisUpdate))

		goto err;

	if (nextupd &&

		!ASN1_TIME_to_generalizedtime(nextupd, &single->nextUpdate))

		goto err;

	OCSP_CERTID_free(single->certId);

	if(!(single->certId = OCSP_CERTID_dup(cid)))

		goto err;

	cs = single->certStatus;

	switch(cs->type = status)

		{

	case V_OCSP_CERTSTATUS_REVOKED:

		if (!revtime)

		        {

		        OCSPerr(OCSP_F_OCSP_BASIC_ADD1_STATUS,OCSP_R_NO_REVOKED_TIME);

			goto err;

		        }

		if (!(cs->value.revoked = ri = OCSP_REVOKEDINFO_new())) goto err;

		if (!ASN1_TIME_to_generalizedtime(revtime, &ri->revocationTime))

			goto err;	

		if (reason != OCSP_REVOKED_STATUS_NOSTATUS)

		        {

			if (!(ri->revocationReason = ASN1_ENUMERATED_new())) 

			        goto err;

			if (!(ASN1_ENUMERATED_set(ri->revocationReason, 

						  reason)))

			        goto err;	

			}

		break;

	case V_OCSP_CERTSTATUS_GOOD:

		cs->value.good = ASN1_NULL_new();

		break;

	case V_OCSP_CERTSTATUS_UNKNOWN:

		cs->value.unknown = ASN1_NULL_new();

		break;

	default:

		goto err;

		}

	if (!(sk_OCSP_SINGLERESP_push(rsp->tbsResponseData->responses, single)))

		goto err;

	return single;

err:

	OCSP_SINGLERESP_free(single);

	return NULL;

	}

/* Add a certificate to an OCSP request */

EXPORT_C int OCSP_basic_add1_cert(OCSP_BASICRESP *resp, X509 *cert)

	{

	if (!resp->certs && !(resp->certs = sk_X509_new_null()))

		return 0;

	if(!sk_X509_push(resp->certs, cert)) return 0;

	CRYPTO_add(&cert->references, 1, CRYPTO_LOCK_X509);

	return 1;

	}

EXPORT_C int OCSP_basic_sign(OCSP_BASICRESP *brsp, 

			X509 *signer, EVP_PKEY *key, const EVP_MD *dgst,

			STACK_OF(X509) *certs, unsigned long flags)

        {

	int i;

	OCSP_RESPID *rid;

	if (!X509_check_private_key(signer, key))

		{

		OCSPerr(OCSP_F_OCSP_BASIC_SIGN, OCSP_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);

		goto err;

		}

	if(!(flags & OCSP_NOCERTS))

		{

		if(!OCSP_basic_add1_cert(brsp, signer))

			goto err;

		for (i = 0; i < sk_X509_num(certs); i++)

			{

			X509 *tmpcert = sk_X509_value(certs, i);

			if(!OCSP_basic_add1_cert(brsp, tmpcert))

				goto err;

			}

		}

	rid = brsp->tbsResponseData->responderId;

	if (flags & OCSP_RESPID_KEY)

		{

		unsigned char md[SHA_DIGEST_LENGTH];

		X509_pubkey_digest(signer, EVP_sha1(), md, NULL);

		if (!(rid->value.byKey = ASN1_OCTET_STRING_new()))

			goto err;

		if (!(ASN1_OCTET_STRING_set(rid->value.byKey, md, SHA_DIGEST_LENGTH)))

				goto err;

		rid->type = V_OCSP_RESPID_KEY;

		}

	else

		{

		if (!X509_NAME_set(&rid->value.byName,

					X509_get_subject_name(signer)))

				goto err;

		rid->type = V_OCSP_RESPID_NAME;

		}

	if (!(flags & OCSP_NOTIME) &&

		!X509_gmtime_adj(brsp->tbsResponseData->producedAt, 0))

		goto err;

	/* Right now, I think that not doing double hashing is the right

	   thing.	-- Richard Levitte */

	if (!OCSP_BASICRESP_sign(brsp, key, dgst, 0)) goto err;

	return 1;

err:

	return 0;

	}