/* ocsp.h */

/* 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).

 *

 */

/*

 © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.

 */

#ifndef HEADER_OCSP_H

#define HEADER_OCSP_H

#if (defined(__SYMBIAN32__) && !defined(SYMBIAN))

#define SYMBIAN

#endif

#ifdef SYMBIAN

#include <e32def.h>

#endif

#include <openssl/x509.h>

#include <openssl/x509v3.h>

#include <openssl/safestack.h>

#ifdef  __cplusplus

extern "C" {

#endif

/* Various flags and values */

#define OCSP_DEFAULT_NONCE_LENGTH	16

#define OCSP_NOCERTS			0x1

#define OCSP_NOINTERN			0x2

#define OCSP_NOSIGS			0x4

#define OCSP_NOCHAIN			0x8

#define OCSP_NOVERIFY			0x10

#define OCSP_NOEXPLICIT			0x20

#define OCSP_NOCASIGN			0x40

#define OCSP_NODELEGATED		0x80

#define OCSP_NOCHECKS			0x100

#define OCSP_TRUSTOTHER			0x200

#define OCSP_RESPID_KEY			0x400

#define OCSP_NOTIME			0x800

/*   CertID ::= SEQUENCE {

 *       hashAlgorithm            AlgorithmIdentifier,

 *       issuerNameHash     OCTET STRING, -- Hash of Issuer's DN

 *       issuerKeyHash      OCTET STRING, -- Hash of Issuers public key (excluding the tag & length fields)

 *       serialNumber       CertificateSerialNumber }

 */

typedef struct ocsp_cert_id_st

	{

	X509_ALGOR *hashAlgorithm;

	ASN1_OCTET_STRING *issuerNameHash;

	ASN1_OCTET_STRING *issuerKeyHash;

	ASN1_INTEGER *serialNumber;

	} OCSP_CERTID;

DECLARE_STACK_OF(OCSP_CERTID)

/*   Request ::=     SEQUENCE {

 *       reqCert                    CertID,

 *       singleRequestExtensions    [0] EXPLICIT Extensions OPTIONAL }

 */

typedef struct ocsp_one_request_st

	{

	OCSP_CERTID *reqCert;

	STACK_OF(X509_EXTENSION) *singleRequestExtensions;

	} OCSP_ONEREQ;

DECLARE_STACK_OF(OCSP_ONEREQ)

DECLARE_ASN1_SET_OF(OCSP_ONEREQ)

/*   TBSRequest      ::=     SEQUENCE {

 *       version             [0] EXPLICIT Version DEFAULT v1,

 *       requestorName       [1] EXPLICIT GeneralName OPTIONAL,

 *       requestList             SEQUENCE OF Request,

 *       requestExtensions   [2] EXPLICIT Extensions OPTIONAL }

 */

typedef struct ocsp_req_info_st

	{

	ASN1_INTEGER *version;

	GENERAL_NAME *requestorName;

	STACK_OF(OCSP_ONEREQ) *requestList;

	STACK_OF(X509_EXTENSION) *requestExtensions;

	} OCSP_REQINFO;

/*   Signature       ::=     SEQUENCE {

 *       signatureAlgorithm   AlgorithmIdentifier,

 *       signature            BIT STRING,

 *       certs                [0] EXPLICIT SEQUENCE OF Certificate OPTIONAL }

 */

typedef struct ocsp_signature_st

	{

	X509_ALGOR *signatureAlgorithm;

	ASN1_BIT_STRING *signature;

	STACK_OF(X509) *certs;

	} OCSP_SIGNATURE;

/*   OCSPRequest     ::=     SEQUENCE {

 *       tbsRequest                  TBSRequest,

 *       optionalSignature   [0]     EXPLICIT Signature OPTIONAL }

 */

typedef struct ocsp_request_st

	{

	OCSP_REQINFO *tbsRequest;

	OCSP_SIGNATURE *optionalSignature; /* OPTIONAL */

	} OCSP_REQUEST;

/*   OCSPResponseStatus ::= ENUMERATED {

 *       successful            (0),      --Response has valid confirmations

 *       malformedRequest      (1),      --Illegal confirmation request

 *       internalError         (2),      --Internal error in issuer

 *       tryLater              (3),      --Try again later

 *                                       --(4) is not used

 *       sigRequired           (5),      --Must sign the request

 *       unauthorized          (6)       --Request unauthorized

 *   }

 */

#define OCSP_RESPONSE_STATUS_SUCCESSFUL          0

#define OCSP_RESPONSE_STATUS_MALFORMEDREQUEST     1

#define OCSP_RESPONSE_STATUS_INTERNALERROR        2

#define OCSP_RESPONSE_STATUS_TRYLATER             3

#define OCSP_RESPONSE_STATUS_SIGREQUIRED          5

#define OCSP_RESPONSE_STATUS_UNAUTHORIZED         6

/*   ResponseBytes ::=       SEQUENCE {

 *       responseType   OBJECT IDENTIFIER,

 *       response       OCTET STRING }

 */

typedef struct ocsp_resp_bytes_st

	{

	ASN1_OBJECT *responseType;

	ASN1_OCTET_STRING *response;

	} OCSP_RESPBYTES;

/*   OCSPResponse ::= SEQUENCE {

 *      responseStatus         OCSPResponseStatus,

 *      responseBytes          [0] EXPLICIT ResponseBytes OPTIONAL }

 */

typedef struct ocsp_response_st

	{

	ASN1_ENUMERATED *responseStatus;

	OCSP_RESPBYTES  *responseBytes;

	} OCSP_RESPONSE;

/*   ResponderID ::= CHOICE {

 *      byName   [1] Name,

 *      byKey    [2] KeyHash }

 */

#define V_OCSP_RESPID_NAME 0

#define V_OCSP_RESPID_KEY  1

typedef struct ocsp_responder_id_st

	{

	int type;

	union   {

		X509_NAME* byName;

        	ASN1_OCTET_STRING *byKey;

		} value;

	} OCSP_RESPID;

/*   KeyHash ::= OCTET STRING --SHA-1 hash of responder's public key

 *                            --(excluding the tag and length fields)

 */

/*   RevokedInfo ::= SEQUENCE {

 *       revocationTime              GeneralizedTime,

 *       revocationReason    [0]     EXPLICIT CRLReason OPTIONAL }

 */

typedef struct ocsp_revoked_info_st

	{

	ASN1_GENERALIZEDTIME *revocationTime;

	ASN1_ENUMERATED *revocationReason;

	} OCSP_REVOKEDINFO;

/*   CertStatus ::= CHOICE {

 *       good                [0]     IMPLICIT NULL,

 *       revoked             [1]     IMPLICIT RevokedInfo,

 *       unknown             [2]     IMPLICIT UnknownInfo }

 */

#define V_OCSP_CERTSTATUS_GOOD    0

#define V_OCSP_CERTSTATUS_REVOKED 1

#define V_OCSP_CERTSTATUS_UNKNOWN 2

typedef struct ocsp_cert_status_st

	{

	int type;

	union	{

		ASN1_NULL *good;

		OCSP_REVOKEDINFO *revoked;

		ASN1_NULL *unknown;

		} value;

	} OCSP_CERTSTATUS;

/*   SingleResponse ::= SEQUENCE {

 *      certID                       CertID,

 *      certStatus                   CertStatus,

 *      thisUpdate                   GeneralizedTime,

 *      nextUpdate           [0]     EXPLICIT GeneralizedTime OPTIONAL,

 *      singleExtensions     [1]     EXPLICIT Extensions OPTIONAL }

 */

typedef struct ocsp_single_response_st

	{

	OCSP_CERTID *certId;

	OCSP_CERTSTATUS *certStatus;

	ASN1_GENERALIZEDTIME *thisUpdate;

	ASN1_GENERALIZEDTIME *nextUpdate;

	STACK_OF(X509_EXTENSION) *singleExtensions;

	} OCSP_SINGLERESP;

DECLARE_STACK_OF(OCSP_SINGLERESP)

DECLARE_ASN1_SET_OF(OCSP_SINGLERESP)

/*   ResponseData ::= SEQUENCE {

 *      version              [0] EXPLICIT Version DEFAULT v1,

 *      responderID              ResponderID,

 *      producedAt               GeneralizedTime,

 *      responses                SEQUENCE OF SingleResponse,

 *      responseExtensions   [1] EXPLICIT Extensions OPTIONAL }

 */

typedef struct ocsp_response_data_st

	{

	ASN1_INTEGER *version;

	OCSP_RESPID  *responderId;

	ASN1_GENERALIZEDTIME *producedAt;

	STACK_OF(OCSP_SINGLERESP) *responses;

	STACK_OF(X509_EXTENSION) *responseExtensions;

	} OCSP_RESPDATA;

/*   BasicOCSPResponse       ::= SEQUENCE {

 *      tbsResponseData      ResponseData,

 *      signatureAlgorithm   AlgorithmIdentifier,

 *      signature            BIT STRING,

 *      certs                [0] EXPLICIT SEQUENCE OF Certificate OPTIONAL }

 */

  /* Note 1:

     The value for "signature" is specified in the OCSP rfc2560 as follows:

     "The value for the signature SHALL be computed on the hash of the DER

     encoding ResponseData."  This means that you must hash the DER-encoded

     tbsResponseData, and then run it through a crypto-signing function, which

     will (at least w/RSA) do a hash-'n'-private-encrypt operation.  This seems

     a bit odd, but that's the spec.  Also note that the data structures do not

     leave anywhere to independently specify the algorithm used for the initial

     hash. So, we look at the signature-specification algorithm, and try to do

     something intelligent.	-- Kathy Weinhold, CertCo */

  /* Note 2:

     It seems that the mentioned passage from RFC 2560 (section 4.2.1) is open

     for interpretation.  I've done tests against another responder, and found

     that it doesn't do the double hashing that the RFC seems to say one

     should.  Therefore, all relevant functions take a flag saying which

     variant should be used.	-- Richard Levitte, OpenSSL team and CeloCom */

typedef struct ocsp_basic_response_st

	{

	OCSP_RESPDATA *tbsResponseData;

	X509_ALGOR *signatureAlgorithm;

	ASN1_BIT_STRING *signature;

	STACK_OF(X509) *certs;

	} OCSP_BASICRESP;

/*

 *   CRLReason ::= ENUMERATED {

 *        unspecified             (0),

 *        keyCompromise           (1),

 *        cACompromise            (2),

 *        affiliationChanged      (3),

 *        superseded              (4),

 *        cessationOfOperation    (5),

 *        certificateHold         (6),

 *        removeFromCRL           (8) }

 */

#define OCSP_REVOKED_STATUS_NOSTATUS               -1

#define OCSP_REVOKED_STATUS_UNSPECIFIED             0

#define OCSP_REVOKED_STATUS_KEYCOMPROMISE           1

#define OCSP_REVOKED_STATUS_CACOMPROMISE            2

#define OCSP_REVOKED_STATUS_AFFILIATIONCHANGED      3

#define OCSP_REVOKED_STATUS_SUPERSEDED              4

#define OCSP_REVOKED_STATUS_CESSATIONOFOPERATION    5

#define OCSP_REVOKED_STATUS_CERTIFICATEHOLD         6

#define OCSP_REVOKED_STATUS_REMOVEFROMCRL           8

/* CrlID ::= SEQUENCE {

 *     crlUrl               [0]     EXPLICIT IA5String OPTIONAL,

 *     crlNum               [1]     EXPLICIT INTEGER OPTIONAL,

 *     crlTime              [2]     EXPLICIT GeneralizedTime OPTIONAL }

 */

typedef struct ocsp_crl_id_st

        {

	ASN1_IA5STRING *crlUrl;

	ASN1_INTEGER *crlNum;

	ASN1_GENERALIZEDTIME *crlTime;

        } OCSP_CRLID;

/* ServiceLocator ::= SEQUENCE {

 *      issuer    Name,

 *      locator   AuthorityInfoAccessSyntax OPTIONAL }

 */

typedef struct ocsp_service_locator_st

        {

	X509_NAME* issuer;

	STACK_OF(ACCESS_DESCRIPTION) *locator;

        } OCSP_SERVICELOC;

#define PEM_STRING_OCSP_REQUEST	"OCSP REQUEST"

#define PEM_STRING_OCSP_RESPONSE "OCSP RESPONSE"

#define d2i_OCSP_REQUEST_bio(bp,p) ASN1_d2i_bio_of(OCSP_REQUEST,OCSP_REQUEST_new,d2i_OCSP_REQUEST,bp,p)

#define d2i_OCSP_RESPONSE_bio(bp,p) ASN1_d2i_bio_of(OCSP_RESPONSE,OCSP_RESPONSE_new,d2i_OCSP_RESPONSE,bp,p)

#define	PEM_read_bio_OCSP_REQUEST(bp,x,cb) (OCSP_REQUEST *)PEM_ASN1_read_bio( \

     (char *(*)())d2i_OCSP_REQUEST,PEM_STRING_OCSP_REQUEST,bp,(char **)x,cb,NULL)

#define	PEM_read_bio_OCSP_RESPONSE(bp,x,cb)(OCSP_RESPONSE *)PEM_ASN1_read_bio(\

     (char *(*)())d2i_OCSP_RESPONSE,PEM_STRING_OCSP_RESPONSE,bp,(char **)x,cb,NULL)

#define PEM_write_bio_OCSP_REQUEST(bp,o) \

    PEM_ASN1_write_bio((int (*)())i2d_OCSP_REQUEST,PEM_STRING_OCSP_REQUEST,\

			bp,(char *)o, NULL,NULL,0,NULL,NULL)

#define PEM_write_bio_OCSP_RESPONSE(bp,o) \

    PEM_ASN1_write_bio((int (*)())i2d_OCSP_RESPONSE,PEM_STRING_OCSP_RESPONSE,\

			bp,(char *)o, NULL,NULL,0,NULL,NULL)

#define i2d_OCSP_RESPONSE_bio(bp,o) ASN1_i2d_bio_of(OCSP_RESPONSE,i2d_OCSP_RESPONSE,bp,o)

#define i2d_OCSP_REQUEST_bio(bp,o) ASN1_i2d_bio_of(OCSP_REQUEST,i2d_OCSP_REQUEST,bp,o)

#define OCSP_REQUEST_sign(o,pkey,md) \

	ASN1_item_sign(ASN1_ITEM_rptr(OCSP_REQINFO),\

		o->optionalSignature->signatureAlgorithm,NULL,\

	        o->optionalSignature->signature,o->tbsRequest,pkey,md)

#define OCSP_BASICRESP_sign(o,pkey,md,d) \

	ASN1_item_sign(ASN1_ITEM_rptr(OCSP_RESPDATA),o->signatureAlgorithm,NULL,\

		o->signature,o->tbsResponseData,pkey,md)

#define OCSP_REQUEST_verify(a,r) ASN1_item_verify(ASN1_ITEM_rptr(OCSP_REQINFO),\

        a->optionalSignature->signatureAlgorithm,\

	a->optionalSignature->signature,a->tbsRequest,r)

#define OCSP_BASICRESP_verify(a,r,d) ASN1_item_verify(ASN1_ITEM_rptr(OCSP_RESPDATA),\

	a->signatureAlgorithm,a->signature,a->tbsResponseData,r)

#define ASN1_BIT_STRING_digest(data,type,md,len) \

	ASN1_item_digest(ASN1_ITEM_rptr(ASN1_BIT_STRING),type,data,md,len)

#define OCSP_CERTID_dup(cid) ASN1_dup_of(OCSP_CERTID,i2d_OCSP_CERTID,d2i_OCSP_CERTID,cid)

#define OCSP_CERTSTATUS_dup(cs)\

                (OCSP_CERTSTATUS*)ASN1_dup((int(*)())i2d_OCSP_CERTSTATUS,\

		(char *(*)())d2i_OCSP_CERTSTATUS,(char *)(cs))

IMPORT_C OCSP_RESPONSE *OCSP_sendreq_bio(BIO *b, char *path, OCSP_REQUEST *req);

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

IMPORT_C OCSP_CERTID *OCSP_cert_id_new(const EVP_MD *dgst, 

			      X509_NAME *issuerName, 

			      ASN1_BIT_STRING* issuerKey, 

			      ASN1_INTEGER *serialNumber);

IMPORT_C OCSP_ONEREQ *OCSP_request_add0_id(OCSP_REQUEST *req, OCSP_CERTID *cid);

IMPORT_C int OCSP_request_add1_nonce(OCSP_REQUEST *req, unsigned char *val, int len);

IMPORT_C int OCSP_basic_add1_nonce(OCSP_BASICRESP *resp, unsigned char *val, int len);

IMPORT_C int OCSP_check_nonce(OCSP_REQUEST *req, OCSP_BASICRESP *bs);

IMPORT_C int OCSP_copy_nonce(OCSP_BASICRESP *resp, OCSP_REQUEST *req);

IMPORT_C int OCSP_request_set1_name(OCSP_REQUEST *req, X509_NAME *nm);

IMPORT_C int OCSP_request_add1_cert(OCSP_REQUEST *req, X509 *cert);

IMPORT_C int OCSP_request_sign(OCSP_REQUEST   *req,

		      X509           *signer,

		      EVP_PKEY       *key,

		      const EVP_MD   *dgst,

		      STACK_OF(X509) *certs,

		      unsigned long flags);

IMPORT_C int OCSP_response_status(OCSP_RESPONSE *resp);

IMPORT_C OCSP_BASICRESP *OCSP_response_get1_basic(OCSP_RESPONSE *resp);

IMPORT_C int OCSP_resp_count(OCSP_BASICRESP *bs);

IMPORT_C OCSP_SINGLERESP *OCSP_resp_get0(OCSP_BASICRESP *bs, int idx);

IMPORT_C int OCSP_resp_find(OCSP_BASICRESP *bs, OCSP_CERTID *id, int last);

IMPORT_C int OCSP_single_get0_status(OCSP_SINGLERESP *single, int *reason,

				ASN1_GENERALIZEDTIME **revtime,

				ASN1_GENERALIZEDTIME **thisupd,

				ASN1_GENERALIZEDTIME **nextupd);

IMPORT_C int OCSP_resp_find_status(OCSP_BASICRESP *bs, OCSP_CERTID *id, int *status,

				int *reason,

				ASN1_GENERALIZEDTIME **revtime,

				ASN1_GENERALIZEDTIME **thisupd,

				ASN1_GENERALIZEDTIME **nextupd);

IMPORT_C int OCSP_check_validity(ASN1_GENERALIZEDTIME *thisupd,

			ASN1_GENERALIZEDTIME *nextupd,

			long sec, long maxsec);

IMPORT_C int OCSP_request_verify(OCSP_REQUEST *req, STACK_OF(X509) *certs, X509_STORE *store, unsigned long flags);

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

IMPORT_C int OCSP_id_issuer_cmp(OCSP_CERTID *a, OCSP_CERTID *b);

IMPORT_C int OCSP_id_cmp(OCSP_CERTID *a, OCSP_CERTID *b);

IMPORT_C int OCSP_request_onereq_count(OCSP_REQUEST *req);

IMPORT_C OCSP_ONEREQ *OCSP_request_onereq_get0(OCSP_REQUEST *req, int i);

IMPORT_C OCSP_CERTID *OCSP_onereq_get0_id(OCSP_ONEREQ *one);

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

			ASN1_OCTET_STRING **pikeyHash,

			ASN1_INTEGER **pserial, OCSP_CERTID *cid);

IMPORT_C int OCSP_request_is_signed(OCSP_REQUEST *req);

IMPORT_C OCSP_RESPONSE *OCSP_response_create(int status, OCSP_BASICRESP *bs);

IMPORT_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);

IMPORT_C int OCSP_basic_add1_cert(OCSP_BASICRESP *resp, X509 *cert);

IMPORT_C int OCSP_basic_sign(OCSP_BASICRESP *brsp, 

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

			STACK_OF(X509) *certs, unsigned long flags);

IMPORT_C ASN1_STRING *ASN1_STRING_encode(ASN1_STRING *s, i2d_of_void *i2d,

				void *data, STACK_OF(ASN1_OBJECT) *sk);

#define ASN1_STRING_encode_of(type,s,i2d,data,sk) \

	ASN1_STRING_encode(s, CHECKED_I2D_OF(type, i2d), data, sk)

IMPORT_C X509_EXTENSION *OCSP_crlID_new(char *url, long *n, char *tim);

IMPORT_C X509_EXTENSION *OCSP_accept_responses_new(char **oids);

IMPORT_C X509_EXTENSION *OCSP_archive_cutoff_new(char* tim);

IMPORT_C X509_EXTENSION *OCSP_url_svcloc_new(X509_NAME* issuer, char **urls);

IMPORT_C int OCSP_REQUEST_get_ext_count(OCSP_REQUEST *x);

IMPORT_C int OCSP_REQUEST_get_ext_by_NID(OCSP_REQUEST *x, int nid, int lastpos);

IMPORT_C int OCSP_REQUEST_get_ext_by_OBJ(OCSP_REQUEST *x, ASN1_OBJECT *obj, int lastpos);

IMPORT_C int OCSP_REQUEST_get_ext_by_critical(OCSP_REQUEST *x, int crit, int lastpos);