mirror of
https://github.com/rn10950/RetroZilla.git
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420 lines
15 KiB
C
420 lines
15 KiB
C
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* pkix_ocspchecker.c
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*
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* OcspChecker Object Functions
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*
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*/
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#include "pkix_ocspchecker.h"
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#include "pkix_pl_ocspcertid.h"
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#include "pkix_error.h"
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/* --Private-Data-and-Types--------------------------------------- */
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typedef struct pkix_OcspCheckerStruct {
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/* RevocationMethod is the super class of OcspChecker. */
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pkix_RevocationMethod method;
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PKIX_PL_VerifyCallback certVerifyFcn;
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} pkix_OcspChecker;
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/* --Private-Functions-------------------------------------------- */
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/*
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* FUNCTION: pkix_OcspChecker_Destroy
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* (see comments for PKIX_PL_DestructorCallback in pkix_pl_system.h)
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*/
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static PKIX_Error *
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pkix_OcspChecker_Destroy(
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PKIX_PL_Object *object,
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void *plContext)
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{
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return NULL;
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}
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/*
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* FUNCTION: pkix_OcspChecker_RegisterSelf
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* DESCRIPTION:
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* Registers PKIX_OCSPCHECKER_TYPE and its related functions with
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* systemClasses[]
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* THREAD SAFETY:
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* Not Thread Safe - for performance and complexity reasons
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*
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* Since this function is only called by PKIX_PL_Initialize, which should
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* only be called once, it is acceptable that this function is not
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* thread-safe.
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*/
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PKIX_Error *
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pkix_OcspChecker_RegisterSelf(void *plContext)
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{
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extern pkix_ClassTable_Entry systemClasses[PKIX_NUMTYPES];
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pkix_ClassTable_Entry* entry = &systemClasses[PKIX_OCSPCHECKER_TYPE];
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PKIX_ENTER(OCSPCHECKER, "pkix_OcspChecker_RegisterSelf");
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entry->description = "OcspChecker";
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entry->typeObjectSize = sizeof(pkix_OcspChecker);
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entry->destructor = pkix_OcspChecker_Destroy;
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PKIX_RETURN(OCSPCHECKER);
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}
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/*
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* FUNCTION: pkix_OcspChecker_Create
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*/
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PKIX_Error *
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pkix_OcspChecker_Create(PKIX_RevocationMethodType methodType,
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PKIX_UInt32 flags,
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PKIX_UInt32 priority,
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pkix_LocalRevocationCheckFn localRevChecker,
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pkix_ExternalRevocationCheckFn externalRevChecker,
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PKIX_PL_VerifyCallback verifyFn,
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pkix_RevocationMethod **pChecker,
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void *plContext)
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{
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pkix_OcspChecker *method = NULL;
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PKIX_ENTER(OCSPCHECKER, "pkix_OcspChecker_Create");
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PKIX_NULLCHECK_ONE(pChecker);
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PKIX_CHECK(PKIX_PL_Object_Alloc
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(PKIX_OCSPCHECKER_TYPE,
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sizeof (pkix_OcspChecker),
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(PKIX_PL_Object **)&method,
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plContext),
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PKIX_COULDNOTCREATECERTCHAINCHECKEROBJECT);
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pkixErrorResult = pkix_RevocationMethod_Init(
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(pkix_RevocationMethod*)method, methodType, flags, priority,
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localRevChecker, externalRevChecker, plContext);
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if (pkixErrorResult) {
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goto cleanup;
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}
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method->certVerifyFcn = (PKIX_PL_VerifyCallback)verifyFn;
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*pChecker = (pkix_RevocationMethod*)method;
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method = NULL;
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cleanup:
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PKIX_DECREF(method);
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PKIX_RETURN(OCSPCHECKER);
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}
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/*
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* FUNCTION: pkix_OcspChecker_MapResultCodeToRevStatus
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*/
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PKIX_RevocationStatus
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pkix_OcspChecker_MapResultCodeToRevStatus(SECErrorCodes resultCode)
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{
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switch (resultCode) {
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case SEC_ERROR_REVOKED_CERTIFICATE:
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return PKIX_RevStatus_Revoked;
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default:
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return PKIX_RevStatus_NoInfo;
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}
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}
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/* --Public-Functions--------------------------------------------- */
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/*
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* FUNCTION: pkix_OcspChecker_Check (see comments in pkix_checker.h)
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*/
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/*
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* The OCSPChecker is created in an idle state, and remains in this state until
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* either (a) the default Responder has been set and enabled, and a Check
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* request is received with no responder specified, or (b) a Check request is
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* received with a specified responder. A request message is constructed and
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* given to the HttpClient. If non-blocking I/O is used the client may return
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* with WOULDBLOCK, in which case the OCSPChecker returns the WOULDBLOCK
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* condition to its caller in turn. On a subsequent call the I/O is resumed.
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* When a response is received it is decoded and the results provided to the
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* caller.
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*
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*/
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PKIX_Error *
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pkix_OcspChecker_CheckLocal(
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PKIX_PL_Cert *cert,
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PKIX_PL_Cert *issuer,
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PKIX_PL_Date *date,
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pkix_RevocationMethod *checkerObject,
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PKIX_ProcessingParams *procParams,
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PKIX_UInt32 methodFlags,
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PKIX_Boolean chainVerificationState,
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PKIX_RevocationStatus *pRevStatus,
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PKIX_UInt32 *pReasonCode,
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void *plContext)
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{
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PKIX_PL_OcspCertID *cid = NULL;
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PKIX_Boolean hasFreshStatus = PKIX_FALSE;
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PKIX_Boolean statusIsGood = PKIX_FALSE;
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SECErrorCodes resultCode = SEC_ERROR_REVOKED_CERTIFICATE_OCSP;
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PKIX_RevocationStatus revStatus = PKIX_RevStatus_NoInfo;
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PKIX_ENTER(OCSPCHECKER, "pkix_OcspChecker_CheckLocal");
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PKIX_CHECK(
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PKIX_PL_OcspCertID_Create(cert, NULL, &cid,
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plContext),
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PKIX_OCSPCERTIDCREATEFAILED);
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if (!cid) {
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goto cleanup;
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}
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PKIX_CHECK(
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PKIX_PL_OcspCertID_GetFreshCacheStatus(cid, date,
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&hasFreshStatus,
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&statusIsGood,
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&resultCode,
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plContext),
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PKIX_OCSPCERTIDGETFRESHCACHESTATUSFAILED);
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if (hasFreshStatus) {
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if (statusIsGood) {
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revStatus = PKIX_RevStatus_Success;
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resultCode = 0;
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} else {
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revStatus = pkix_OcspChecker_MapResultCodeToRevStatus(resultCode);
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}
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}
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cleanup:
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*pRevStatus = revStatus;
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/* ocsp carries only tree statuses: good, bad, and unknown.
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* revStatus is used to pass them. reasonCode is always set
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* to be unknown. */
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*pReasonCode = crlEntryReasonUnspecified;
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PKIX_DECREF(cid);
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PKIX_RETURN(OCSPCHECKER);
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}
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/*
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* The OCSPChecker is created in an idle state, and remains in this state until
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* either (a) the default Responder has been set and enabled, and a Check
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* request is received with no responder specified, or (b) a Check request is
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* received with a specified responder. A request message is constructed and
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* given to the HttpClient. When a response is received it is decoded and the
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* results provided to the caller.
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*
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* During the most recent enhancement of this function, it has been found that
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* it doesn't correctly implement non-blocking I/O.
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*
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* The nbioContext is used in two places, for "response-obtaining" and
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* for "response-verification".
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*
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* However, if this function gets called to resume, it always
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* repeats the "request creation" and "response fetching" steps!
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* As a result, the earlier operation is never resumed.
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*/
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PKIX_Error *
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pkix_OcspChecker_CheckExternal(
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PKIX_PL_Cert *cert,
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PKIX_PL_Cert *issuer,
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PKIX_PL_Date *date,
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pkix_RevocationMethod *checkerObject,
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PKIX_ProcessingParams *procParams,
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PKIX_UInt32 methodFlags,
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PKIX_RevocationStatus *pRevStatus,
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PKIX_UInt32 *pReasonCode,
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void **pNBIOContext,
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void *plContext)
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{
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SECErrorCodes resultCode = SEC_ERROR_REVOKED_CERTIFICATE_OCSP;
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PKIX_Boolean uriFound = PKIX_FALSE;
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PKIX_Boolean passed = PKIX_TRUE;
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pkix_OcspChecker *checker = NULL;
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PKIX_PL_OcspCertID *cid = NULL;
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PKIX_PL_OcspRequest *request = NULL;
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PKIX_PL_OcspResponse *response = NULL;
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PKIX_PL_Date *validity = NULL;
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PKIX_RevocationStatus revStatus = PKIX_RevStatus_NoInfo;
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void *nbioContext = NULL;
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enum { stageGET, stagePOST } currentStage;
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PRBool retry = PR_FALSE;
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PKIX_ENTER(OCSPCHECKER, "pkix_OcspChecker_CheckExternal");
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PKIX_CHECK(
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pkix_CheckType((PKIX_PL_Object*)checkerObject,
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PKIX_OCSPCHECKER_TYPE, plContext),
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PKIX_OBJECTNOTOCSPCHECKER);
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checker = (pkix_OcspChecker *)checkerObject;
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PKIX_CHECK(
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PKIX_PL_OcspCertID_Create(cert, NULL, &cid,
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plContext),
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PKIX_OCSPCERTIDCREATEFAILED);
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/* create request */
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PKIX_CHECK(
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pkix_pl_OcspRequest_Create(cert, cid, validity, NULL,
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methodFlags, &uriFound, &request,
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plContext),
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PKIX_OCSPREQUESTCREATEFAILED);
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if (uriFound == PKIX_FALSE) {
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/* no caching for certs lacking URI */
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resultCode = 0;
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goto cleanup;
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}
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if (methodFlags & CERT_REV_M_FORCE_POST_METHOD_FOR_OCSP) {
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/* Do not try HTTP GET, only HTTP POST */
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currentStage = stagePOST;
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} else {
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/* Try HTTP GET first, falling back to POST */
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currentStage = stageGET;
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}
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do {
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const char *method;
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passed = PKIX_TRUE;
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retry = PR_FALSE;
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if (currentStage == stageGET) {
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method = "GET";
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} else {
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PORT_Assert(currentStage == stagePOST);
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method = "POST";
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}
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/* send request and create a response object */
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PKIX_CHECK_NO_GOTO(
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pkix_pl_OcspResponse_Create(request, method, NULL,
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checker->certVerifyFcn,
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&nbioContext,
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&response,
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plContext),
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PKIX_OCSPRESPONSECREATEFAILED);
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if (pkixErrorResult) {
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passed = PKIX_FALSE;
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}
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if (passed && nbioContext != 0) {
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*pNBIOContext = nbioContext;
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goto cleanup;
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}
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if (passed){
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PKIX_CHECK_NO_GOTO(
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pkix_pl_OcspResponse_Decode(response, &passed,
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&resultCode, plContext),
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PKIX_OCSPRESPONSEDECODEFAILED);
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if (pkixErrorResult) {
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passed = PKIX_FALSE;
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}
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}
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if (passed){
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PKIX_CHECK_NO_GOTO(
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pkix_pl_OcspResponse_GetStatus(response, &passed,
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&resultCode, plContext),
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PKIX_OCSPRESPONSEGETSTATUSRETURNEDANERROR);
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if (pkixErrorResult) {
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passed = PKIX_FALSE;
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}
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}
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if (passed){
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PKIX_CHECK_NO_GOTO(
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pkix_pl_OcspResponse_VerifySignature(response, cert,
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procParams, &passed,
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&nbioContext, plContext),
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PKIX_OCSPRESPONSEVERIFYSIGNATUREFAILED);
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if (pkixErrorResult) {
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passed = PKIX_FALSE;
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} else {
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if (nbioContext != 0) {
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*pNBIOContext = nbioContext;
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goto cleanup;
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}
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}
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}
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if (!passed && currentStage == stagePOST) {
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/* We won't retry a POST failure, so it's final.
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* Because the following block with its call to
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* pkix_pl_OcspResponse_GetStatusForCert
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* will take care of caching good or bad state,
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* but we only execute that next block if there hasn't
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* been a failure yet, we must cache the POST
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* failure now.
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*/
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if (cid && cid->certID) {
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/* Caching MIGHT consume the cid. */
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PKIX_Error *err;
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err = PKIX_PL_OcspCertID_RememberOCSPProcessingFailure(
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cid, plContext);
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if (err) {
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PKIX_PL_Object_DecRef((PKIX_PL_Object*)err, plContext);
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}
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}
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}
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if (passed){
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PKIX_Boolean allowCachingOfFailures =
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(currentStage == stagePOST) ? PKIX_TRUE : PKIX_FALSE;
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PKIX_CHECK_NO_GOTO(
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pkix_pl_OcspResponse_GetStatusForCert(cid, response,
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allowCachingOfFailures,
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date,
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&passed, &resultCode,
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plContext),
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PKIX_OCSPRESPONSEGETSTATUSFORCERTFAILED);
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if (pkixErrorResult) {
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passed = PKIX_FALSE;
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} else if (passed == PKIX_FALSE) {
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revStatus = pkix_OcspChecker_MapResultCodeToRevStatus(resultCode);
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} else {
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revStatus = PKIX_RevStatus_Success;
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}
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}
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if (currentStage == stageGET && revStatus != PKIX_RevStatus_Success &&
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revStatus != PKIX_RevStatus_Revoked) {
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/* we'll retry */
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PKIX_DECREF(response);
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retry = PR_TRUE;
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currentStage = stagePOST;
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revStatus = PKIX_RevStatus_NoInfo;
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if (pkixErrorResult) {
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PKIX_PL_Object_DecRef((PKIX_PL_Object*)pkixErrorResult,
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plContext);
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pkixErrorResult = NULL;
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}
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}
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} while (retry);
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cleanup:
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if (revStatus == PKIX_RevStatus_NoInfo && (uriFound ||
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methodFlags & PKIX_REV_M_REQUIRE_INFO_ON_MISSING_SOURCE) &&
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methodFlags & PKIX_REV_M_FAIL_ON_MISSING_FRESH_INFO) {
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revStatus = PKIX_RevStatus_Revoked;
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}
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*pRevStatus = revStatus;
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/* ocsp carries only three statuses: good, bad, and unknown.
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* revStatus is used to pass them. reasonCode is always set
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* to be unknown. */
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*pReasonCode = crlEntryReasonUnspecified;
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PKIX_DECREF(cid);
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PKIX_DECREF(request);
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PKIX_DECREF(response);
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PKIX_RETURN(OCSPCHECKER);
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}
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