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https://github.com/classilla/tenfourfox.git
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341 lines
11 KiB
C
341 lines
11 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_nameconstraintschecker.c
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*
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* Functions for Name Constraints Checkers
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*
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*/
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#include "pkix_nameconstraintschecker.h"
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/* --Private-NameConstraintsCheckerState-Functions---------------------- */
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/*
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* FUNCTION: pkix_NameConstraintsCheckerstate_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_NameConstraintsCheckerState_Destroy(
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PKIX_PL_Object *object,
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void *plContext)
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{
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pkix_NameConstraintsCheckerState *state = NULL;
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PKIX_ENTER(CERTNAMECONSTRAINTSCHECKERSTATE,
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"pkix_NameConstraintsCheckerState_Destroy");
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PKIX_NULLCHECK_ONE(object);
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/* Check that object type */
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PKIX_CHECK(pkix_CheckType
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(object, PKIX_CERTNAMECONSTRAINTSCHECKERSTATE_TYPE, plContext),
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PKIX_OBJECTNOTNAMECONSTRAINTSCHECKERSTATE);
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state = (pkix_NameConstraintsCheckerState *)object;
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PKIX_DECREF(state->nameConstraints);
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PKIX_DECREF(state->nameConstraintsOID);
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cleanup:
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PKIX_RETURN(CERTNAMECONSTRAINTSCHECKERSTATE);
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}
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/*
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* FUNCTION: pkix_NameConstraintsCheckerState_RegisterSelf
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*
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* DESCRIPTION:
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* Registers PKIX_CERTNAMECONSTRAINTSCHECKERSTATE_TYPE and its related
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* functions with systemClasses[]
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*
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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_NameConstraintsCheckerState_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(CERTNAMECONSTRAINTSCHECKERSTATE,
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"pkix_NameConstraintsCheckerState_RegisterSelf");
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entry.description = "NameConstraintsCheckerState";
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entry.objCounter = 0;
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entry.typeObjectSize = sizeof(pkix_NameConstraintsCheckerState);
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entry.destructor = pkix_NameConstraintsCheckerState_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_CERTNAMECONSTRAINTSCHECKERSTATE_TYPE] = entry;
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PKIX_RETURN(CERTNAMECONSTRAINTSCHECKERSTATE);
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}
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/*
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* FUNCTION: pkix_NameConstraintsCheckerState_Create
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*
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* DESCRIPTION:
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* Allocate and initialize NameConstraintsChecker state data.
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*
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* PARAMETERS
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* "nameConstraints"
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* Address of NameConstraints to be stored in state. May be NULL.
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* "numCerts"
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* Number of certificates in the validation chain. This data is used
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* to identify end-entity.
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* "pCheckerState"
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* Address of NameConstraintsCheckerState that is returned. Must be
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* non-NULL.
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* "plContext" - Platform-specific context pointer.
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*
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* THREAD SAFETY:
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* Thread Safe (see Thread Safety Definitions in Programmer's Guide)
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*
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* RETURNS:
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* Returns NULL if the function succeeds.
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* Returns a CERTNAMECONSTRAINTSCHECKERSTATE Error if the function fails in
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* a non-fatal way.
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* Returns a Fatal Error
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*/
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static PKIX_Error *
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pkix_NameConstraintsCheckerState_Create(
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PKIX_PL_CertNameConstraints *nameConstraints,
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PKIX_UInt32 numCerts,
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pkix_NameConstraintsCheckerState **pCheckerState,
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void *plContext)
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{
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pkix_NameConstraintsCheckerState *state = NULL;
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PKIX_ENTER(CERTNAMECONSTRAINTSCHECKERSTATE,
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"pkix_NameConstraintsCheckerState_Create");
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PKIX_NULLCHECK_ONE(pCheckerState);
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PKIX_CHECK(PKIX_PL_Object_Alloc
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(PKIX_CERTNAMECONSTRAINTSCHECKERSTATE_TYPE,
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sizeof (pkix_NameConstraintsCheckerState),
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(PKIX_PL_Object **)&state,
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plContext),
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PKIX_COULDNOTCREATENAMECONSTRAINTSCHECKERSTATEOBJECT);
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/* Initialize fields */
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PKIX_CHECK(PKIX_PL_OID_Create
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(PKIX_NAMECONSTRAINTS_OID,
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&state->nameConstraintsOID,
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plContext),
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PKIX_OIDCREATEFAILED);
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PKIX_INCREF(nameConstraints);
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state->nameConstraints = nameConstraints;
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state->certsRemaining = numCerts;
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*pCheckerState = 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(CERTNAMECONSTRAINTSCHECKERSTATE);
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}
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/* --Private-NameConstraintsChecker-Functions------------------------- */
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/*
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* FUNCTION: pkix_NameConstraintsChecker_Check
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* (see comments for PKIX_CertChainChecker_CheckCallback in pkix_checker.h)
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*/
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static PKIX_Error *
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pkix_NameConstraintsChecker_Check(
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PKIX_CertChainChecker *checker,
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PKIX_PL_Cert *cert,
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PKIX_List *unresolvedCriticalExtensions,
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void **pNBIOContext,
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void *plContext)
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{
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pkix_NameConstraintsCheckerState *state = NULL;
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PKIX_PL_CertNameConstraints *nameConstraints = NULL;
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PKIX_PL_CertNameConstraints *mergedNameConstraints = NULL;
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PKIX_Boolean selfIssued = PKIX_FALSE;
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PKIX_Boolean lastCert = PKIX_FALSE;
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PKIX_Boolean treatCommonNameAsDNSName = PKIX_FALSE;
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PKIX_List *extKeyUsageList = NULL;
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PKIX_PL_OID *serverAuthOID = NULL;
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PKIX_ENTER(CERTCHAINCHECKER, "pkix_NameConstraintsChecker_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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lastCert = state->certsRemaining == 0;
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/* Get status of self issued */
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PKIX_CHECK(pkix_IsCertSelfIssued(cert, &selfIssued, plContext),
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PKIX_ISCERTSELFISSUEDFAILED);
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if (lastCert) {
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/* For the last cert, treat the CN as a DNS name for name
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* constraint check. But only if EKU has id-kp-serverAuth
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* or EKU is absent. It does not make sense to treat CN
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* as a DNS name for an OCSP signing certificate, for example.
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*/
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PKIX_CHECK(PKIX_PL_Cert_GetExtendedKeyUsage
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(cert, &extKeyUsageList, plContext),
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PKIX_CERTGETEXTENDEDKEYUSAGEFAILED);
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if (extKeyUsageList == NULL) {
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treatCommonNameAsDNSName = PKIX_TRUE;
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} else {
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PKIX_CHECK(PKIX_PL_OID_Create
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(PKIX_KEY_USAGE_SERVER_AUTH_OID,
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&serverAuthOID,
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plContext),
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PKIX_OIDCREATEFAILED);
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PKIX_CHECK(pkix_List_Contains
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(extKeyUsageList,
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(PKIX_PL_Object *) serverAuthOID,
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&treatCommonNameAsDNSName,
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plContext),
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PKIX_LISTCONTAINSFAILED);
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}
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}
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/* Check on non self-issued and if so only for last cert */
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if (selfIssued == PKIX_FALSE ||
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(selfIssued == PKIX_TRUE && lastCert)) {
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PKIX_CHECK(PKIX_PL_Cert_CheckNameConstraints
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(cert, state->nameConstraints, treatCommonNameAsDNSName,
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plContext),
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PKIX_CERTCHECKNAMECONSTRAINTSFAILED);
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}
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if (!lastCert) {
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PKIX_CHECK(PKIX_PL_Cert_GetNameConstraints
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(cert, &nameConstraints, plContext),
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PKIX_CERTGETNAMECONSTRAINTSFAILED);
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/* Merge with previous name constraints kept in state */
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if (nameConstraints != NULL) {
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if (state->nameConstraints == NULL) {
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state->nameConstraints = nameConstraints;
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} else {
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PKIX_CHECK(PKIX_PL_Cert_MergeNameConstraints
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(nameConstraints,
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state->nameConstraints,
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&mergedNameConstraints,
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plContext),
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PKIX_CERTMERGENAMECONSTRAINTSFAILED);
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PKIX_DECREF(nameConstraints);
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PKIX_DECREF(state->nameConstraints);
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state->nameConstraints = mergedNameConstraints;
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}
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/* Remove Name 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->nameConstraintsOID,
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plContext),
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PKIX_LISTREMOVEFAILED);
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}
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}
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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(extKeyUsageList);
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PKIX_DECREF(serverAuthOID);
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PKIX_RETURN(CERTCHAINCHECKER);
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}
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/*
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* FUNCTION: pkix_NameConstraintsChecker_Initialize
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*
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* DESCRIPTION:
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* Create a CertChainChecker with a NameConstraintsCheckerState. The
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* NameConstraintsCheckerState is created with "trustedNC" and "numCerts"
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* as its initial state. The CertChainChecker for the NameConstraints is
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* returned at address of "pChecker".
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*
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* PARAMETERS
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* "trustedNC"
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* The NameConstraints from trusted anchor Cert is stored at "trustedNC"
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* for initialization. May be NULL.
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* "numCerts"
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* Number of certificates in the validation chain. This data is used
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* to identify end-entity.
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* "pChecker"
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* Address of CertChainChecker to bo created and returned.
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* Must be non-NULL.
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* "plContext" - Platform-specific context pointer.
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*
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* THREAD SAFETY:
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* Thread Safe (see Thread Safety Definitions in Programmer's Guide)
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*
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* RETURNS:
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* Returns NULL if the function succeeds.
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* Returns a CERTCHAINCHECKER Error if the function fails in a non-fatal way.
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* Returns a Fatal Error
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*/
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PKIX_Error *
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pkix_NameConstraintsChecker_Initialize(
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PKIX_PL_CertNameConstraints *trustedNC,
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PKIX_UInt32 numCerts,
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PKIX_CertChainChecker **pChecker,
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void *plContext)
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{
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pkix_NameConstraintsCheckerState *state = NULL;
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PKIX_ENTER(CERTCHAINCHECKER, "pkix_NameConstraintsChecker_Initialize");
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PKIX_NULLCHECK_ONE(pChecker);
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PKIX_CHECK(pkix_NameConstraintsCheckerState_Create
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(trustedNC, numCerts, &state, plContext),
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PKIX_NAMECONSTRAINTSCHECKERSTATECREATEFAILED);
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PKIX_CHECK(PKIX_CertChainChecker_Create
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(pkix_NameConstraintsChecker_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_CERTCHAINCHECKERCREATEFAILED);
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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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