mirror of
https://github.com/rn10950/RetroZilla.git
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307 lines
10 KiB
C
307 lines
10 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_basicconstraintschecker.c
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*
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* Functions for basic constraints validation
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*
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*/
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#include "pkix_basicconstraintschecker.h"
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/* --Private-BasicConstraintsCheckerState-Functions------------------------- */
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/*
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* FUNCTION: pkix_BasicConstraintsCheckerState_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_BasicConstraintsCheckerState_Destroy(
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PKIX_PL_Object *object,
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void *plContext)
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{
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pkix_BasicConstraintsCheckerState *state = NULL;
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PKIX_ENTER(BASICCONSTRAINTSCHECKERSTATE,
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"pkix_BasicConstraintsCheckerState_Destroy");
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PKIX_NULLCHECK_ONE(object);
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/* Check that this object is a basic constraints checker state */
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PKIX_CHECK(pkix_CheckType
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(object, PKIX_BASICCONSTRAINTSCHECKERSTATE_TYPE, plContext),
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PKIX_OBJECTNOTBASICCONSTRAINTSCHECKERSTATE);
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state = (pkix_BasicConstraintsCheckerState *)object;
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PKIX_DECREF(state->basicConstraintsOID);
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cleanup:
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PKIX_RETURN(BASICCONSTRAINTSCHECKERSTATE);
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}
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/*
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* FUNCTION: pkix_BasicConstraintsCheckerState_RegisterSelf
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* DESCRIPTION:
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* Registers PKIX_CERT_TYPE and its related functions with 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_BasicConstraintsCheckerState_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;
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PKIX_ENTER(BASICCONSTRAINTSCHECKERSTATE,
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"pkix_BasicConstraintsCheckerState_RegisterSelf");
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entry.description = "BasicConstraintsCheckerState";
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entry.objCounter = 0;
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entry.typeObjectSize = sizeof(pkix_BasicConstraintsCheckerState);
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entry.destructor = pkix_BasicConstraintsCheckerState_Destroy;
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entry.equalsFunction = NULL;
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entry.hashcodeFunction = NULL;
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entry.toStringFunction = NULL;
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entry.comparator = NULL;
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entry.duplicateFunction = NULL;
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systemClasses[PKIX_BASICCONSTRAINTSCHECKERSTATE_TYPE] = entry;
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PKIX_RETURN(BASICCONSTRAINTSCHECKERSTATE);
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}
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/*
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* FUNCTION: pkix_BasicConstraintsCheckerState_Create
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* DESCRIPTION:
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*
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* Creates a new BasicConstraintsCheckerState using the number of certs in
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* the chain represented by "certsRemaining" and stores it at "pState".
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*
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* PARAMETERS:
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* "certsRemaining"
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* Number of certificates in the chain.
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* "pState"
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* Address where object pointer will be stored. Must be non-NULL.
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* "plContext"
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* Platform-specific context pointer.
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* THREAD SAFETY:
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* Thread Safe (see Thread Safety Definitions in Programmer's Guide)
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* RETURNS:
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* Returns NULL if the function succeeds.
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* Returns a BasicConstraintsCheckerState Error if the function fails in a
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* non-fatal way.
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* Returns a Fatal Error if the function fails in an unrecoverable way.
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*/
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static PKIX_Error *
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pkix_BasicConstraintsCheckerState_Create(
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PKIX_UInt32 certsRemaining,
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pkix_BasicConstraintsCheckerState **pState,
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void *plContext)
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{
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pkix_BasicConstraintsCheckerState *state = NULL;
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PKIX_ENTER(BASICCONSTRAINTSCHECKERSTATE,
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"pkix_BasicConstraintsCheckerState_Create");
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PKIX_NULLCHECK_ONE(pState);
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PKIX_CHECK(PKIX_PL_Object_Alloc
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(PKIX_BASICCONSTRAINTSCHECKERSTATE_TYPE,
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sizeof (pkix_BasicConstraintsCheckerState),
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(PKIX_PL_Object **)&state,
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plContext),
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PKIX_COULDNOTCREATEBASICCONSTRAINTSSTATEOBJECT);
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/* initialize fields */
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state->certsRemaining = certsRemaining;
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state->maxPathLength = PKIX_UNLIMITED_PATH_CONSTRAINT;
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PKIX_CHECK(PKIX_PL_OID_Create
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(PKIX_BASICCONSTRAINTS_OID,
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&state->basicConstraintsOID,
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plContext),
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PKIX_OIDCREATEFAILED);
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*pState = state;
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state = NULL;
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cleanup:
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PKIX_DECREF(state);
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PKIX_RETURN(BASICCONSTRAINTSCHECKERSTATE);
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}
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/* --Private-BasicConstraintsChecker-Functions------------------------------ */
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/*
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* FUNCTION: pkix_BasicConstraintsChecker_Check
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* (see comments for PKIX_CertChainChecker_CheckCallback in pkix_checker.h)
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*/
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PKIX_Error *
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pkix_BasicConstraintsChecker_Check(
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PKIX_CertChainChecker *checker,
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PKIX_PL_Cert *cert,
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PKIX_List *unresolvedCriticalExtensions, /* list of PKIX_PL_OID */
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void **pNBIOContext,
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void *plContext)
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{
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PKIX_PL_CertBasicConstraints *basicConstraints = NULL;
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pkix_BasicConstraintsCheckerState *state = NULL;
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PKIX_Boolean caFlag = PKIX_FALSE;
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PKIX_Int32 pathLength = 0;
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PKIX_Int32 maxPathLength_now;
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PKIX_Boolean isSelfIssued = PKIX_FALSE;
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PKIX_ENTER(CERTCHAINCHECKER, "pkix_BasicConstraintsChecker_Check");
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PKIX_NULLCHECK_THREE(checker, cert, pNBIOContext);
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*pNBIOContext = NULL; /* we never block on pending I/O */
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PKIX_CHECK(PKIX_CertChainChecker_GetCertChainCheckerState
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(checker, (PKIX_PL_Object **)&state, plContext),
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PKIX_CERTCHAINCHECKERGETCERTCHAINCHECKERSTATEFAILED);
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state->certsRemaining--;
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if (state->certsRemaining != 0) {
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PKIX_CHECK(PKIX_PL_Cert_GetBasicConstraints
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(cert, &basicConstraints, plContext),
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PKIX_CERTGETBASICCONSTRAINTSFAILED);
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/* get CA Flag and path length */
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if (basicConstraints != NULL) {
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PKIX_CHECK(PKIX_PL_BasicConstraints_GetCAFlag
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(basicConstraints,
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&caFlag,
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plContext),
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PKIX_BASICCONSTRAINTSGETCAFLAGFAILED);
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if (caFlag == PKIX_TRUE) {
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PKIX_CHECK
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(PKIX_PL_BasicConstraints_GetPathLenConstraint
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(basicConstraints,
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&pathLength,
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plContext),
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PKIX_BASICCONSTRAINTSGETPATHLENCONSTRAINTFAILED);
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}
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}else{
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caFlag = PKIX_FALSE;
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pathLength = PKIX_UNLIMITED_PATH_CONSTRAINT;
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}
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PKIX_CHECK(pkix_IsCertSelfIssued
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(cert,
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&isSelfIssued,
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plContext),
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PKIX_ISCERTSELFISSUEDFAILED);
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maxPathLength_now = state->maxPathLength;
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if (isSelfIssued != PKIX_TRUE) {
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/* Not last CA Cert, but maxPathLength is down to zero */
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if (maxPathLength_now == 0) {
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PKIX_ERROR(PKIX_BASICCONSTRAINTSVALIDATIONFAILEDLN);
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}
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if (caFlag == PKIX_FALSE) {
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PKIX_ERROR(PKIX_BASICCONSTRAINTSVALIDATIONFAILEDCA);
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}
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if (maxPathLength_now > 0) { /* can be unlimited (-1) */
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maxPathLength_now--;
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}
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}
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if (caFlag == PKIX_TRUE) {
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if (maxPathLength_now == PKIX_UNLIMITED_PATH_CONSTRAINT){
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maxPathLength_now = pathLength;
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} else {
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/* If pathLength is not specified, don't set */
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if (pathLength != PKIX_UNLIMITED_PATH_CONSTRAINT) {
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maxPathLength_now =
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(maxPathLength_now > pathLength)?
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pathLength:maxPathLength_now;
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}
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}
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}
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state->maxPathLength = maxPathLength_now;
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}
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/* Remove Basic Constraints Extension OID from list */
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if (unresolvedCriticalExtensions != NULL) {
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PKIX_CHECK(pkix_List_Remove
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(unresolvedCriticalExtensions,
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(PKIX_PL_Object *) state->basicConstraintsOID,
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plContext),
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PKIX_LISTREMOVEFAILED);
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}
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PKIX_CHECK(PKIX_CertChainChecker_SetCertChainCheckerState
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(checker, (PKIX_PL_Object *)state, plContext),
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PKIX_CERTCHAINCHECKERSETCERTCHAINCHECKERSTATEFAILED);
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cleanup:
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PKIX_DECREF(state);
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PKIX_DECREF(basicConstraints);
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PKIX_RETURN(CERTCHAINCHECKER);
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}
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/*
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* FUNCTION: pkix_BasicConstraintsChecker_Initialize
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* DESCRIPTION:
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* Registers PKIX_CERT_TYPE and its related functions with 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_BasicConstraintsChecker_Initialize(
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PKIX_UInt32 certsRemaining,
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PKIX_CertChainChecker **pChecker,
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void *plContext)
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{
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pkix_BasicConstraintsCheckerState *state = NULL;
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PKIX_ENTER(CERTCHAINCHECKER, "pkix_BasicConstraintsChecker_Initialize");
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PKIX_NULLCHECK_ONE(pChecker);
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PKIX_CHECK(pkix_BasicConstraintsCheckerState_Create
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(certsRemaining, &state, plContext),
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PKIX_BASICCONSTRAINTSCHECKERSTATECREATEFAILED);
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PKIX_CHECK(PKIX_CertChainChecker_Create
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(pkix_BasicConstraintsChecker_Check,
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PKIX_FALSE,
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PKIX_FALSE,
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NULL,
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(PKIX_PL_Object *)state,
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pChecker,
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plContext),
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PKIX_CERTCHAINCHECKERCHECKFAILED);
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cleanup:
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PKIX_DECREF(state);
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PKIX_RETURN(CERTCHAINCHECKER);
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}
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