DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Implementation

Mercurial (56e7b9127e89)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/*
 * Interface to the OCSP implementation.
 */

#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

/*
 * This function registers the HttpClient with whose functions the
 * HttpClientFcn structure has been populated as the default Http
 * client.
 *
 * The function table must be a global object.
 * The caller must ensure that NSS will be able to call
 * the registered functions for the lifetime of the process.
 */
extern SECStatus
SEC_RegisterDefaultHttpClient(const SEC_HttpClientFcn *fcnTable);

/*
 * This function obtains the HttpClient which has been registered
 * by an earlier call to SEC_RegisterDefaultHttpClient.
 */
extern const SEC_HttpClientFcn *
SEC_GetRegisteredHttpClient(void);

/*
 * Sets parameters that control NSS' internal OCSP cache.
 * maxCacheEntries, special varlues are:
 *   -1 disable cache
 *   0 unlimited cache entries
 * minimumSecondsToNextFetchAttempt:
 *   whenever an OCSP request was attempted or completed over the network,
 *   wait at least this number of seconds before trying to fetch again.
 * maximumSecondsToNextFetchAttempt:
 *   this is the maximum age of a cached response we allow, until we try
 *   to fetch an updated response, even if the OCSP responder expects
 *   that newer information update will not be available yet.
 */
extern SECStatus
CERT_OCSPCacheSettings(PRInt32 maxCacheEntries,
                       PRUint32 minimumSecondsToNextFetchAttempt,
                       PRUint32 maximumSecondsToNextFetchAttempt);

/*
 * Set the desired behaviour on OCSP failures.
 * See definition of ocspFailureMode for allowed choices.
 */
extern SECStatus
CERT_SetOCSPFailureMode(SEC_OcspFailureMode ocspFailureMode);

/*
 * Configure the maximum time NSS will wait for an OCSP response.
 */
extern SECStatus
CERT_SetOCSPTimeout(PRUint32 seconds);

/*
 * Removes all items currently stored in the OCSP cache.
 */
extern SECStatus
CERT_ClearOCSPCache(void);

/*
 * 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.
 *   const 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.
 *   const 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);

/* If forcePost is set, OCSP requests will only be sent using the HTTP POST
 * method. When forcePost is not set, OCSP requests will be sent using the
 * HTTP GET method, with a fallback to POST when we fail to receive a response
 * and/or when we receive an uncacheable response like "Unknown."
 *
 * The default is to use GET and fallback to POST.
 */
extern SECStatus CERT_ForcePostMethodForOCSP(PRBool forcePost);

/*
 * -------------------------------------------------------
 * 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.
 *   PRTime 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, PRTime 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.
 *   SECOidTag responseType0, ...
 *     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,
                                SECOidTag responseType0, ...);

/*
 * 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:
 *   PLArenaPool *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(PLArenaPool *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(const 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(const 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:
 *   PLArenaPool *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.
 *   const char *location
 *     The location of the OCSP responder (a URL).
 *   PRTime 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(PLArenaPool *arena, CERTCertList *certList,
                            const char *location, PRTime 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.
 *   CERTCertificate *issuerCert
 *     Issuer of the certificate that generated the OCSP request.
 * 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,
                                 CERTCertificate *issuerCert);

/*
 * 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(const CERTCertificate *cert);

/*
 * FUNCTION: CERT_RegisterAlternateOCSPAIAInfoCallBack
 *   This function serves two purposes.
 *   1) It registers the address of a callback function that will be
 *   called for certs that have no OCSP AIA extension, to see if the
 *   callback wishes to supply an alternative URL for such an OCSP inquiry.
 *   2) It outputs the previously registered function's address to the
 *   address supplied by the caller, unless that is NULL.
 *   The registered callback function returns NULL, or an allocated string
 *   that may be subsequently freed by calling PORT_Free().
 * RETURN:
 *   SECSuccess or SECFailure (if the library is not yet intialized)
 */
extern SECStatus
CERT_RegisterAlternateOCSPAIAInfoCallBack(
    CERT_StringFromCertFcn newCallback,
    CERT_StringFromCertFcn *oldCallback);

/*
 * FUNCTION: CERT_ParseURL
 *   Parse a URI into hostname, port, and path.  The scheme in the URI must
 *   be "http".
 * INPUTS:
 *   const char *url
 *     The URI to be parsed
 * OUTPUTS:
 *   char **pHostname
 *     Pointer to store the hostname obtained from the URI.
 *     This result should be freed (via PORT_Free) when no longer in use.
 *   PRUint16 *pPort
 *     Pointer to store the port number obtained from the URI.
 *   char **pPath
 *     Pointer to store the path obtained from the URI.
 *     This result should be freed (via PORT_Free) when no longer in use.
 * RETURN:
 *   Returns SECSuccess when parsing was successful. Returns SECFailure when
 *   problems were encountered.
 */
extern SECStatus
CERT_ParseURL(const char *url, char **pHostname, PRUint16 *pPort, char **pPath);

/*
 * 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)
 *   PRTime 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,
                     PRTime time, void *pwArg);

/*
 * FUNCTION: CERT_CacheOCSPResponseFromSideChannel
 *   First, this function checks the OCSP cache to see if a good response
 *   for the given certificate already exists. If it does, then the function
 *   returns successfully.
 *
 *   If not, then it validates that the given OCSP response is a valid,
 *   good response for the given certificate and inserts it into the
 *   cache.
 *
 *   This function is intended for use when OCSP responses are provided via a
 *   side-channel, i.e. TLS OCSP stapling (a.k.a. the status_request extension).
 *
 * INPUTS:
 *   CERTCertDBHandle *handle
 *     certificate DB of the cert that is being checked
 *   CERTCertificate *cert
 *     the certificate being checked
 *   PRTime time
 *     time for which status is to be determined
 *   SECItem *encodedResponse
 *     the DER encoded bytes of the OCSP response
 *   void *pwArg
 *     argument for password prompting, if needed
 * RETURN:
 *   SECSuccess if the cert was found in the cache, or if the OCSP response was
 *   found to be valid and inserted into the cache. SECFailure otherwise.
 */
extern SECStatus
CERT_CacheOCSPResponseFromSideChannel(CERTCertDBHandle *handle,
                                      CERTCertificate *cert,
                                      PRTime time,
                                      const SECItem *encodedResponse,
                                      void *pwArg);

/*
 * FUNCTION: CERT_GetOCSPStatusForCertID
 *  Returns the OCSP status contained in the passed in parameter response
 *  that corresponds to the certID passed in.
 * INPUTS:
 *  CERTCertDBHandle *handle
 *    certificate DB of the cert that is being checked
 *  CERTOCSPResponse *response
 *    the OCSP response we want to retrieve status from.
 *  CERTOCSPCertID *certID
 *    the ID we want to look for from the response.
 *  CERTCertificate *signerCert
 *    the certificate that was used to sign the OCSP response.
 *    must be obtained via a call to CERT_VerifyOCSPResponseSignature.
 *  PRTime time
 *    The time at which we're checking the status for.
 *  RETURN:
 *    Return values are the same as those for CERT_CheckOCSPStatus
 */
extern SECStatus
CERT_GetOCSPStatusForCertID(CERTCertDBHandle *handle,
                            CERTOCSPResponse *response,
                            CERTOCSPCertID *certID,
                            CERTCertificate *signerCert,
                            PRTime time);

/*
 * FUNCTION CERT_GetOCSPResponseStatus
 *   Returns the response status for the response passed.
 * INPUTS:
 *   CERTOCSPResponse *response
 *     The response to query for status
 *  RETURN:
 *    Returns SECSuccess if the response has a successful status value.
 *    Otherwise it returns SECFailure and sets one of the following error
 *    codes via PORT_SetError
 *        SEC_ERROR_OCSP_MALFORMED_REQUEST
 *        SEC_ERROR_OCSP_SERVER_ERROR
 *        SEC_ERROR_OCSP_TRY_SERVER_LATER
 *        SEC_ERROR_OCSP_REQUEST_NEEDS_SIG
 *        SEC_ERROR_OCSP_UNAUTHORIZED_REQUEST
 *        SEC_ERROR_OCSP_UNKNOWN_RESPONSE_STATUS
 */
extern SECStatus
CERT_GetOCSPResponseStatus(CERTOCSPResponse *response);

/*
 * FUNCTION CERT_CreateOCSPCertID
 *  Returns the OCSP certID for the certificate passed in.
 * INPUTS:
 *  CERTCertificate *cert
 *    The certificate for which to create the certID for.
 *  PRTime time
 *    The time at which the id is requested for.  This is used
 *    to determine the appropriate issuer for the cert since
 *    the issuing CA may be an older expired certificate.
 *  RETURN:
 *    A new copy of a CERTOCSPCertID*.  The memory for this certID
 *    should be freed by calling CERT_DestroyOCSPCertID when the
 *    certID is no longer necessary.
 */
extern CERTOCSPCertID *
CERT_CreateOCSPCertID(CERTCertificate *cert, PRTime time);

/*
 * FUNCTION: CERT_DestroyOCSPCertID
 *  Frees the memory associated with the certID passed in.
 * INPUTS:
 *  CERTOCSPCertID* certID
 *    The certID that the caller no longer needs and wants to
 *    free the associated memory.
 * RETURN:
 *  SECSuccess if freeing the memory was successful.  Returns
 *  SECFailure if the memory passed in was not allocated with
 *  a call to CERT_CreateOCSPCertID.
 */
extern SECStatus
CERT_DestroyOCSPCertID(CERTOCSPCertID *certID);

extern CERTOCSPSingleResponse *
CERT_CreateOCSPSingleResponseGood(PLArenaPool *arena,
                                  CERTOCSPCertID *id,
                                  PRTime thisUpdate,
                                  const PRTime *nextUpdate);

extern CERTOCSPSingleResponse *
CERT_CreateOCSPSingleResponseUnknown(PLArenaPool *arena,
                                     CERTOCSPCertID *id,
                                     PRTime thisUpdate,
                                     const PRTime *nextUpdate);

extern CERTOCSPSingleResponse *
CERT_CreateOCSPSingleResponseRevoked(
    PLArenaPool *arena,
    CERTOCSPCertID *id,
    PRTime thisUpdate,
    const PRTime *nextUpdate,
    PRTime revocationTime,
    const CERTCRLEntryReasonCode *revocationReason);

extern SECItem *
CERT_CreateEncodedOCSPSuccessResponse(
    PLArenaPool *arena,
    CERTCertificate *responderCert,
    CERTOCSPResponderIDType responderIDType,
    PRTime producedAt,
    CERTOCSPSingleResponse **responses,
    void *wincx);

/*
 * FUNCTION: CERT_CreateEncodedOCSPErrorResponse
 *  Creates an encoded OCSP response with an error response status.
 * INPUTS:
 *  PLArenaPool *arena
 *    The return value is allocated from here.
 *    If a NULL is passed in, allocation is done from the heap instead.
 *  int error
 *    An NSS error code indicating an error response status. The error
 *    code is mapped to an OCSP response status as follows:
 *        SEC_ERROR_OCSP_MALFORMED_REQUEST -> malformedRequest
 *        SEC_ERROR_OCSP_SERVER_ERROR -> internalError
 *        SEC_ERROR_OCSP_TRY_SERVER_LATER -> tryLater
 *        SEC_ERROR_OCSP_REQUEST_NEEDS_SIG -> sigRequired
 *        SEC_ERROR_OCSP_UNAUTHORIZED_REQUEST -> unauthorized
 *    where the OCSP response status is an enumerated type defined in
 *    RFC 2560:
 *    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
 *    }
 * RETURN:
 *   Returns a pointer to the SECItem holding the response.
 *   On error, returns null with error set describing the reason:
 *	SEC_ERROR_INVALID_ARGS
 *   Other errors are low-level problems (no memory, bad database, etc.).
 */
extern SECItem *
CERT_CreateEncodedOCSPErrorResponse(PLArenaPool *arena, int error);

/* Sends an OCSP request using the HTTP POST method to the location addressed
 * by the URL in |location| parameter. The request body will be
 * |encodedRequest|, which must be a valid encoded OCSP request. On success,
 * the server's response is returned and the caller must free it using
 * SECITEM_FreeItem. On failure, NULL is returned. No parsing or validation of
 * the HTTP response is done.
 *
 * If a default HTTP client has been registered with
 * SEC_RegisterDefaultHttpClient then that client is used. Otherwise, an
 * internal HTTP client is used.
 */
SECItem *CERT_PostOCSPRequest(PLArenaPool *arena, const char *location,
                              const SECItem *encodedRequest);

/************************************************************************/
SEC_END_PROTOS

#endif /* _OCSP_H_ */