ocsp.h
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上传日期:2007-01-12
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- /*
- * The contents of this file are subject to the Mozilla Public
- * License Version 1.1 (the "License"); you may not use this file
- * except in compliance with the License. You may obtain a copy of
- * the License at http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- *
- * The Original Code is the Netscape security libraries.
- *
- * The Initial Developer of the Original Code is Netscape
- * Communications Corporation. Portions created by Netscape are
- * Copyright (C) 1994-2000 Netscape Communications Corporation. All
- * Rights Reserved.
- *
- * Contributor(s):
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL"), in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your
- * version of this file only under the terms of the GPL and not to
- * allow others to use your version of this file under the MPL,
- * indicate your decision by deleting the provisions above and
- * replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient
- * may use your version of this file under either the MPL or the
- * GPL.
- */
- /*
- * Interface to the OCSP implementation.
- *
- * $Id: ocsp.h,v 1.1 2000/03/31 19:43:02 relyea%netscape.com Exp $
- */
- #ifndef _OCSP_H_
- #define _OCSP_H_
- #include "plarena.h"
- #include "seccomon.h"
- #include "secoidt.h"
- #include "keyt.h"
- #include "certt.h"
- #include "ocspt.h"
- /************************************************************************/
- SEC_BEGIN_PROTOS
- /*
- * FUNCTION: CERT_EnableOCSPChecking
- * Turns on OCSP checking for the given certificate database.
- * INPUTS:
- * CERTCertDBHandle *handle
- * Certificate database for which OCSP checking will be enabled.
- * RETURN:
- * Returns SECFailure if an error occurred (likely only problem
- * allocating memory); SECSuccess otherwise.
- */
- extern SECStatus
- CERT_EnableOCSPChecking(CERTCertDBHandle *handle);
- /*
- * FUNCTION: CERT_DisableOCSPChecking
- * Turns off OCSP checking for the given certificate database.
- * This routine disables OCSP checking. Though it will return
- * SECFailure if OCSP checking is not enabled, it is "safe" to
- * call it that way and just ignore the return value, if it is
- * easier to just call it than to "remember" whether it is enabled.
- * INPUTS:
- * CERTCertDBHandle *handle
- * Certificate database for which OCSP checking will be disabled.
- * RETURN:
- * Returns SECFailure if an error occurred (usually means that OCSP
- * checking was not enabled or status contexts were not initialized --
- * error set will be SEC_ERROR_OCSP_NOT_ENABLED); SECSuccess otherwise.
- */
- extern SECStatus
- CERT_DisableOCSPChecking(CERTCertDBHandle *handle);
- /*
- * FUNCTION: CERT_SetOCSPDefaultResponder
- * Specify the location and cert of the default responder.
- * If OCSP checking is already enabled *and* use of a default responder
- * is also already enabled, all OCSP checking from now on will go directly
- * to the specified responder. If OCSP checking is not enabled, or if
- * it is but use of a default responder is not enabled, the information
- * will be recorded and take effect whenever both are enabled.
- * INPUTS:
- * CERTCertDBHandle *handle
- * Cert database on which OCSP checking should use the default responder.
- * char *url
- * The location of the default responder (e.g. "http://foo.com:80/ocsp")
- * Note that the location will not be tested until the first attempt
- * to send a request there.
- * char *name
- * The nickname of the cert to trust (expected) to sign the OCSP responses.
- * If the corresponding cert cannot be found, SECFailure is returned.
- * RETURN:
- * Returns SECFailure if an error occurred; SECSuccess otherwise.
- * The most likely error is that the cert for "name" could not be found
- * (probably SEC_ERROR_UNKNOWN_CERT). Other errors are low-level (no memory,
- * bad database, etc.).
- */
- extern SECStatus
- CERT_SetOCSPDefaultResponder(CERTCertDBHandle *handle,
- const char *url, const char *name);
- /*
- * FUNCTION: CERT_EnableOCSPDefaultResponder
- * Turns on use of a default responder when OCSP checking.
- * If OCSP checking is already enabled, this will make subsequent checks
- * go directly to the default responder. (The location of the responder
- * and the nickname of the responder cert must already be specified.)
- * If OCSP checking is not enabled, this will be recorded and take effect
- * whenever it is enabled.
- * INPUTS:
- * CERTCertDBHandle *handle
- * Cert database on which OCSP checking should use the default responder.
- * RETURN:
- * Returns SECFailure if an error occurred; SECSuccess otherwise.
- * No errors are especially likely unless the caller did not previously
- * perform a successful call to SetOCSPDefaultResponder (in which case
- * the error set will be SEC_ERROR_OCSP_NO_DEFAULT_RESPONDER).
- */
- extern SECStatus
- CERT_EnableOCSPDefaultResponder(CERTCertDBHandle *handle);
- /*
- * FUNCTION: CERT_DisableOCSPDefaultResponder
- * Turns off use of a default responder when OCSP checking.
- * (Does nothing if use of a default responder is not enabled.)
- * INPUTS:
- * CERTCertDBHandle *handle
- * Cert database on which OCSP checking should stop using a default
- * responder.
- * RETURN:
- * Returns SECFailure if an error occurred; SECSuccess otherwise.
- * Errors very unlikely (like random memory corruption...).
- */
- extern SECStatus
- CERT_DisableOCSPDefaultResponder(CERTCertDBHandle *handle);
- /*
- * -------------------------------------------------------
- * The Functions above are those expected to be used by a client
- * providing OCSP status checking along with every cert verification.
- * The functions below are for OCSP testing, debugging, or clients
- * or servers performing more specialized OCSP tasks.
- * -------------------------------------------------------
- */
- /*
- * FUNCTION: CERT_CreateOCSPRequest
- * Creates a CERTOCSPRequest, requesting the status of the certs in
- * the given list.
- * INPUTS:
- * CERTCertList *certList
- * A list of certs for which status will be requested.
- * Note that all of these certificates should have the same issuer,
- * or it's expected the response will be signed by a trusted responder.
- * If the certs need to be broken up into multiple requests, that
- * must be handled by the caller (and thus by having multiple calls
- * to this routine), who knows about where the request(s) are being
- * sent and whether there are any trusted responders in place.
- * int64 time
- * Indicates the time for which the certificate status is to be
- * determined -- this may be used in the search for the cert's issuer
- * but has no effect on the request itself.
- * PRBool addServiceLocator
- * If true, the Service Locator extension should be added to the
- * single request(s) for each cert.
- * CERTCertificate *signerCert
- * If non-NULL, means sign the request using this cert. Otherwise,
- * do not sign.
- * XXX note that request signing is not yet supported; see comment in code
- * RETURN:
- * A pointer to a CERTOCSPRequest structure containing an OCSP request
- * for the cert list. On error, null is returned, with an error set
- * indicating the reason. This is likely SEC_ERROR_UNKNOWN_ISSUER.
- * (The issuer is needed to create a request for the certificate.)
- * Other errors are low-level problems (no memory, bad database, etc.).
- */
- extern CERTOCSPRequest *
- CERT_CreateOCSPRequest(CERTCertList *certList, int64 time,
- PRBool addServiceLocator,
- CERTCertificate *signerCert);
- /*
- * FUNCTION: CERT_AddOCSPAcceptableResponses
- * Add the AcceptableResponses extension to an OCSP Request.
- * INPUTS:
- * CERTOCSPRequest *request
- * The request to which the extension should be added.
- * ...
- * A list (of one or more) of SECOidTag -- each of the response types
- * to be added. The last OID *must* be SEC_OID_PKIX_OCSP_BASIC_RESPONSE.
- * (This marks the end of the list, and it must be specified because a
- * client conforming to the OCSP standard is required to handle the basic
- * response type.) The OIDs are not checked in any way.
- * RETURN:
- * SECSuccess if the extension is added; SECFailure if anything goes wrong.
- * All errors are internal or low-level problems (e.g. no memory).
- */
- extern SECStatus
- CERT_AddOCSPAcceptableResponses(CERTOCSPRequest *request, ...);
- /*
- * FUNCTION: CERT_EncodeOCSPRequest
- * DER encodes an OCSP Request, possibly adding a signature as well.
- * XXX Signing is not yet supported, however; see comments in code.
- * INPUTS:
- * PRArenaPool *arena
- * The return value is allocated from here.
- * If a NULL is passed in, allocation is done from the heap instead.
- * CERTOCSPRequest *request
- * The request to be encoded.
- * void *pwArg
- * Pointer to argument for password prompting, if needed. (Definitely
- * not needed if not signing.)
- * RETURN:
- * Returns a NULL on error and a pointer to the SECItem with the
- * encoded value otherwise. Any error is likely to be low-level
- * (e.g. no memory).
- */
- extern SECItem *
- CERT_EncodeOCSPRequest(PRArenaPool *arena, CERTOCSPRequest *request,
- void *pwArg);
- /*
- * FUNCTION: CERT_DecodeOCSPRequest
- * Decode a DER encoded OCSP Request.
- * INPUTS:
- * SECItem *src
- * Pointer to a SECItem holding DER encoded OCSP Request.
- * RETURN:
- * Returns a pointer to a CERTOCSPRequest containing the decoded request.
- * On error, returns NULL. Most likely error is trouble decoding
- * (SEC_ERROR_OCSP_MALFORMED_REQUEST), or low-level problem (no memory).
- */
- extern CERTOCSPRequest *
- CERT_DecodeOCSPRequest(SECItem *src);
- /*
- * FUNCTION: CERT_DestroyOCSPRequest
- * Frees an OCSP Request structure.
- * INPUTS:
- * CERTOCSPRequest *request
- * Pointer to CERTOCSPRequest to be freed.
- * RETURN:
- * No return value; no errors.
- */
- extern void
- CERT_DestroyOCSPRequest(CERTOCSPRequest *request);
- /*
- * FUNCTION: CERT_DecodeOCSPResponse
- * Decode a DER encoded OCSP Response.
- * INPUTS:
- * SECItem *src
- * Pointer to a SECItem holding DER encoded OCSP Response.
- * RETURN:
- * Returns a pointer to a CERTOCSPResponse (the decoded OCSP Response);
- * the caller is responsible for destroying it. Or NULL if error (either
- * response could not be decoded (SEC_ERROR_OCSP_MALFORMED_RESPONSE),
- * it was of an unexpected type (SEC_ERROR_OCSP_UNKNOWN_RESPONSE_TYPE),
- * or a low-level or internal error occurred).
- */
- extern CERTOCSPResponse *
- CERT_DecodeOCSPResponse(SECItem *src);
- /*
- * FUNCTION: CERT_DestroyOCSPResponse
- * Frees an OCSP Response structure.
- * INPUTS:
- * CERTOCSPResponse *request
- * Pointer to CERTOCSPResponse to be freed.
- * RETURN:
- * No return value; no errors.
- */
- extern void
- CERT_DestroyOCSPResponse(CERTOCSPResponse *response);
- /*
- * FUNCTION: CERT_GetEncodedOCSPResponse
- * Creates and sends a request to an OCSP responder, then reads and
- * returns the (encoded) response.
- * INPUTS:
- * PRArenaPool *arena
- * Pointer to arena from which return value will be allocated.
- * If NULL, result will be allocated from the heap (and thus should
- * be freed via SECITEM_FreeItem).
- * CERTCertList *certList
- * A list of certs for which status will be requested.
- * Note that all of these certificates should have the same issuer,
- * or it's expected the response will be signed by a trusted responder.
- * If the certs need to be broken up into multiple requests, that
- * must be handled by the caller (and thus by having multiple calls
- * to this routine), who knows about where the request(s) are being
- * sent and whether there are any trusted responders in place.
- * char *location
- * The location of the OCSP responder (a URL).
- * int64 time
- * Indicates the time for which the certificate status is to be
- * determined -- this may be used in the search for the cert's issuer
- * but has no other bearing on the operation.
- * PRBool addServiceLocator
- * If true, the Service Locator extension should be added to the
- * single request(s) for each cert.
- * CERTCertificate *signerCert
- * If non-NULL, means sign the request using this cert. Otherwise,
- * do not sign.
- * void *pwArg
- * Pointer to argument for password prompting, if needed. (Definitely
- * not needed if not signing.)
- * OUTPUTS:
- * CERTOCSPRequest **pRequest
- * Pointer in which to store the OCSP request created for the given
- * list of certificates. It is only filled in if the entire operation
- * is successful and the pointer is not null -- and in that case the
- * caller is then reponsible for destroying it.
- * RETURN:
- * Returns a pointer to the SECItem holding the response.
- * On error, returns null with error set describing the reason:
- * SEC_ERROR_UNKNOWN_ISSUER
- * SEC_ERROR_CERT_BAD_ACCESS_LOCATION
- * SEC_ERROR_OCSP_BAD_HTTP_RESPONSE
- * Other errors are low-level problems (no memory, bad database, etc.).
- */
- extern SECItem *
- CERT_GetEncodedOCSPResponse(PRArenaPool *arena, CERTCertList *certList,
- char *location, int64 time,
- PRBool addServiceLocator,
- CERTCertificate *signerCert, void *pwArg,
- CERTOCSPRequest **pRequest);
- /*
- * FUNCTION: CERT_VerifyOCSPResponseSignature
- * Check the signature on an OCSP Response. Will also perform a
- * verification of the signer's certificate. Note, however, that a
- * successful verification does not make any statement about the
- * signer's *authority* to provide status for the certificate(s),
- * that must be checked individually for each certificate.
- * INPUTS:
- * CERTOCSPResponse *response
- * Pointer to response structure with signature to be checked.
- * CERTCertDBHandle *handle
- * Pointer to CERTCertDBHandle for certificate DB to use for verification.
- * void *pwArg
- * Pointer to argument for password prompting, if needed.
- * OUTPUTS:
- * CERTCertificate **pSignerCert
- * Pointer in which to store signer's certificate; only filled-in if
- * non-null.
- * RETURN:
- * Returns SECSuccess when signature is valid, anything else means invalid.
- * Possible errors set:
- * SEC_ERROR_OCSP_MALFORMED_RESPONSE - unknown type of ResponderID
- * SEC_ERROR_INVALID_TIME - bad format of "ProducedAt" time
- * SEC_ERROR_UNKNOWN_SIGNER - signer's cert could not be found
- * SEC_ERROR_BAD_SIGNATURE - the signature did not verify
- * Other errors are any of the many possible failures in cert verification
- * (e.g. SEC_ERROR_REVOKED_CERTIFICATE, SEC_ERROR_UNTRUSTED_ISSUER) when
- * verifying the signer's cert, or low-level problems (no memory, etc.)
- */
- extern SECStatus
- CERT_VerifyOCSPResponseSignature(CERTOCSPResponse *response,
- CERTCertDBHandle *handle, void *pwArg,
- CERTCertificate **pSignerCert);
- /*
- * FUNCTION: CERT_GetOCSPAuthorityInfoAccessLocation
- * Get the value of the URI of the OCSP responder for the given cert.
- * This is found in the (optional) Authority Information Access extension
- * in the cert.
- * INPUTS:
- * CERTCertificate *cert
- * The certificate being examined.
- * RETURN:
- * char *
- * A copy of the URI for the OCSP method, if found. If either the
- * extension is not present or it does not contain an entry for OCSP,
- * SEC_ERROR_EXTENSION_NOT_FOUND will be set and a NULL returned.
- * Any other error will also result in a NULL being returned.
- *
- * This result should be freed (via PORT_Free) when no longer in use.
- */
- extern char *
- CERT_GetOCSPAuthorityInfoAccessLocation(CERTCertificate *cert);
- /*
- * FUNCTION: CERT_CheckOCSPStatus
- * Checks the status of a certificate via OCSP. Will only check status for
- * a certificate that has an AIA (Authority Information Access) extension
- * for OCSP *or* when a "default responder" is specified and enabled.
- * (If no AIA extension for OCSP and no default responder in place, the
- * cert is considered to have a good status and SECSuccess is returned.)
- * INPUTS:
- * CERTCertDBHandle *handle
- * certificate DB of the cert that is being checked
- * CERTCertificate *cert
- * the certificate being checked
- * XXX in the long term also need a boolean parameter that specifies
- * whether to check the cert chain, as well; for now we check only
- * the leaf (the specified certificate)
- * int64 time
- * time for which status is to be determined
- * void *pwArg
- * argument for password prompting, if needed
- * RETURN:
- * Returns SECSuccess if an approved OCSP responder "knows" the cert
- * *and* returns a non-revoked status for it; SECFailure otherwise,
- * with an error set describing the reason:
- *
- * SEC_ERROR_OCSP_BAD_HTTP_RESPONSE
- * SEC_ERROR_OCSP_FUTURE_RESPONSE
- * SEC_ERROR_OCSP_MALFORMED_REQUEST
- * SEC_ERROR_OCSP_MALFORMED_RESPONSE
- * SEC_ERROR_OCSP_OLD_RESPONSE
- * SEC_ERROR_OCSP_REQUEST_NEEDS_SIG
- * SEC_ERROR_OCSP_SERVER_ERROR
- * SEC_ERROR_OCSP_TRY_SERVER_LATER
- * SEC_ERROR_OCSP_UNAUTHORIZED_REQUEST
- * SEC_ERROR_OCSP_UNAUTHORIZED_RESPONSE
- * SEC_ERROR_OCSP_UNKNOWN_CERT
- * SEC_ERROR_OCSP_UNKNOWN_RESPONSE_STATUS
- * SEC_ERROR_OCSP_UNKNOWN_RESPONSE_TYPE
- *
- * SEC_ERROR_BAD_SIGNATURE
- * SEC_ERROR_CERT_BAD_ACCESS_LOCATION
- * SEC_ERROR_INVALID_TIME
- * SEC_ERROR_REVOKED_CERTIFICATE
- * SEC_ERROR_UNKNOWN_ISSUER
- * SEC_ERROR_UNKNOWN_SIGNER
- *
- * Other errors are any of the many possible failures in cert verification
- * (e.g. SEC_ERROR_REVOKED_CERTIFICATE, SEC_ERROR_UNTRUSTED_ISSUER) when
- * verifying the signer's cert, or low-level problems (error allocating
- * memory, error performing ASN.1 decoding, etc.).
- */
- extern SECStatus
- CERT_CheckOCSPStatus(CERTCertDBHandle *handle, CERTCertificate *cert,
- int64 time, void *pwArg);
- /************************************************************************/
- SEC_END_PROTOS
- #endif /* _OCSP_H_ */