Change the NSS and NSPR source tree to the new directory structure to be

mozilla/security/nss/lib/libpkix/pkix/top/pkix_validate.c

Index: mozilla/security/nss/lib/libpkix/pkix/top/pkix_validate.c
===================================================================
--- mozilla/security/nss/lib/libpkix/pkix/top/pkix_validate.c	(revision 191424)
+++ mozilla/security/nss/lib/libpkix/pkix/top/pkix_validate.c	(working copy)
@@ -1,1443 +0,0 @@
-/* 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/. */
-/*
- * pkix_validate.c
- *
- * Top level validateChain function
- *
- */
-
-#include "pkix_validate.h"
-#include "pkix_pl_common.h"
-
-/* --Private-Functions-------------------------------------------- */
-
-/*
- * FUNCTION: pkix_AddToVerifyLog
- * DESCRIPTION:
- *
- *  This function returns immediately if the address for the VerifyNode tree
- *  pointed to by "pVerifyTree" is NULL. Otherwise it creates a new VerifyNode
- *  from the Cert pointed to by "cert" and the Error pointed to by "error",
- *  and inserts it at the depth in the VerifyNode tree determined by "depth". A
- *  depth of zero means that this function creates the root node of a new tree.
- *
- *  Note: this function does not include the means of choosing among branches
- *  of a tree. It is intended for non-branching trees, that is, where each
- *  parent node has only a single child node.
- *
- * PARAMETERS:
- *  "cert"
- *      The address of the Cert to be included in the new VerifyNode. Must be
- *      non-NULL.
- *  "depth"
- *      The UInt32 value of the depth.
- *  "error"
- *      The address of the Error to be included in the new VerifyNode.
- *  "pVerifyTree"
- *      The address of the VerifyNode tree into which the created VerifyNode
- *      is to be inserted. The node is not created if VerifyTree is NULL.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Thread Safe (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns a Validate Error if the function fails in a non-fatal way.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-static PKIX_Error *
-pkix_AddToVerifyLog(
-        PKIX_PL_Cert *cert,
-        PKIX_UInt32 depth,
-        PKIX_Error *error,
-        PKIX_VerifyNode **pVerifyTree,
-        void *plContext)
-{
-
-        PKIX_VerifyNode *verifyNode = NULL;
-
-        PKIX_ENTER(VALIDATE, "pkix_AddToVerifyLog");
-        PKIX_NULLCHECK_ONE(cert);
-
-        if (pVerifyTree) { /* nothing to do if no address given for log */
-
-                PKIX_CHECK(pkix_VerifyNode_Create
-                        (cert, depth, error, &verifyNode, plContext),
-                        PKIX_VERIFYNODECREATEFAILED);
-
-                if (depth == 0) {
-                        /* We just created the root node */
-                        *pVerifyTree = verifyNode;
-                } else {
-                        PKIX_CHECK(pkix_VerifyNode_AddToChain
-                                (*pVerifyTree, verifyNode, plContext),
-                                PKIX_VERIFYNODEADDTOCHAINFAILED);
-                }
-        }
-
-cleanup:
-
-        PKIX_RETURN(VALIDATE);
-
-}
-
-/*
- * FUNCTION: pkix_CheckCert
- * DESCRIPTION:
- *
- *  Checks whether the Cert pointed to by "cert" successfully validates
- *  using the List of CertChainCheckers pointed to by "checkers". If the
- *  certificate does not validate, an Error pointer is returned.
- *
- *  This function should be called initially with the UInt32 pointed to by
- *  "pCheckerIndex" containing zero, and the pointer at "pNBIOContext"
- *  containing NULL. If a checker does non-blocking I/O, this function will
- *  return with the index of that checker stored at "pCheckerIndex" and a
- *  platform-dependent non-blocking I/O context stored at "pNBIOContext".
- *  A subsequent call to this function with those values intact will allow the
- *  checking to resume where it left off. This should be repeated until the
- *  function returns with NULL stored at "pNBIOContext".
- *
- * PARAMETERS:
- *  "cert"
- *      Address of Cert to validate. Must be non-NULL.
- *  "checkers"
- *      List of CertChainCheckers which must each validate the certificate.
- *      Must be non-NULL.
- *  "checkedExtOIDs"
- *      List of PKIX_PL_OID that has been processed. If called from building
- *      chain, it is the list of critical extension OIDs that has been
- *      processed prior to validation. May be NULL.
- *  "pCheckerIndex"
- *      Address at which is stored the the index, within the List "checkers",
- *      of a checker whose processing was interrupted by non-blocking I/O.
- *      Must be non-NULL.
- *  "pNBIOContext"
- *      Address at which is stored platform-specific non-blocking I/O context.
- *      Must be non-NULL.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Thread Safe (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns a Validate Error if the function fails in a non-fatal way.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-static PKIX_Error *
-pkix_CheckCert(
-        PKIX_PL_Cert *cert,
-        PKIX_List *checkers,
-        PKIX_List *checkedExtOIDsList,
-        PKIX_UInt32 *pCheckerIndex,
-        void **pNBIOContext,
-        void *plContext)
-{
-        PKIX_CertChainChecker_CheckCallback checkerCheck = NULL;
-        PKIX_CertChainChecker *checker = NULL;
-        PKIX_List *unresCritExtOIDs = NULL;
-        PKIX_UInt32 numCheckers;
-        PKIX_UInt32 numUnresCritExtOIDs = 0;
-        PKIX_UInt32 checkerIndex = 0;
-        void *nbioContext = NULL;
-
-        PKIX_ENTER(VALIDATE, "pkix_CheckCert");
-        PKIX_NULLCHECK_FOUR(cert, checkers, pCheckerIndex, pNBIOContext);
-
-        nbioContext = *pNBIOContext;
-        *pNBIOContext = NULL; /* prepare for case of error exit */
-
-        PKIX_CHECK(PKIX_PL_Cert_GetCriticalExtensionOIDs
-                    (cert, &unresCritExtOIDs, plContext),
-                    PKIX_CERTGETCRITICALEXTENSIONOIDSFAILED);
-
-        PKIX_CHECK(PKIX_List_GetLength(checkers, &numCheckers, plContext),
-                    PKIX_LISTGETLENGTHFAILED);
-
-        for (checkerIndex = *pCheckerIndex;
-                checkerIndex < numCheckers;
-                checkerIndex++) {
-
-                PKIX_CHECK(PKIX_List_GetItem
-                        (checkers,
-                        checkerIndex,
-                        (PKIX_PL_Object **)&checker,
-                        plContext),
-                        PKIX_LISTGETITEMFAILED);
-
-                PKIX_CHECK(PKIX_CertChainChecker_GetCheckCallback
-                        (checker, &checkerCheck, plContext),
-                        PKIX_CERTCHAINCHECKERGETCHECKCALLBACKFAILED);
-
-                PKIX_CHECK(checkerCheck(checker, cert, unresCritExtOIDs,
-                                        &nbioContext,  plContext),
-                           PKIX_CERTCHAINCHECKERCHECKFAILED);
-
-                if (nbioContext != NULL) {
-                        *pCheckerIndex = checkerIndex;
-                        *pNBIOContext = nbioContext;
-                        goto cleanup;
-                }
-
-                PKIX_DECREF(checker);
-        }
-
-        if (unresCritExtOIDs){
-
-#ifdef PKIX_VALIDATEDEBUG
-                {
-                        PKIX_PL_String *oidString = NULL;
-                        PKIX_UInt32 length;
-                        char *oidAscii = NULL;
-                        PKIX_TOSTRING(unresCritExtOIDs, &oidString, plContext,
-                                PKIX_LISTTOSTRINGFAILED);
-                        PKIX_CHECK(PKIX_PL_String_GetEncoded
-                                (oidString,
-                                PKIX_ESCASCII,
-                                (void **) &oidAscii,
-                                &length,
-                                plContext),
-                                PKIX_STRINGGETENCODEDFAILED);
-                        PKIX_VALIDATE_DEBUG_ARG
-                                ("unrecognized critical extension OIDs:"
-                                " %s\n", oidAscii);
-                        PKIX_DECREF(oidString);
-                        PKIX_PL_Free(oidAscii, plContext);
-                }
-#endif
-
-                if (checkedExtOIDsList != NULL) {
-                 /* Take out OID's that had been processed, if any */
-                        PKIX_CHECK(pkix_List_RemoveItems
-                                (unresCritExtOIDs,
-                                checkedExtOIDsList,
-                                plContext),
-                                PKIX_LISTREMOVEITEMSFAILED);
-                }
-
-                PKIX_CHECK(PKIX_List_GetLength
-                        (unresCritExtOIDs, &numUnresCritExtOIDs, plContext),
-                        PKIX_LISTGETLENGTHFAILED);
-
-                if (numUnresCritExtOIDs != 0){
-                        PKIX_ERROR(PKIX_UNRECOGNIZEDCRITICALEXTENSION);
-                }
-
-        }
-
-cleanup:
-
-        PKIX_DECREF(checker);
-        PKIX_DECREF(unresCritExtOIDs);
-
-        PKIX_RETURN(VALIDATE);
-
-}
-
-/*
- * FUNCTION: pkix_InitializeCheckers
- * DESCRIPTION:
- *
- *  Creates several checkers and initializes them with values derived from the
- *  TrustAnchor pointed to by "anchor", the ProcessingParams pointed to by
- *  "procParams", and the number of Certs in the Chain, represented by
- *  "numCerts". The List of checkers is stored at "pCheckers".
- *
- * PARAMETERS:
- *  "anchor"
- *      Address of TrustAnchor used to initialize the SignatureChecker and
- *      NameChainingChecker. Must be non-NULL.
- *  "procParams"
- *      Address of ProcessingParams used to initialize the ExpirationChecker
- *      and TargetCertChecker. Must be non-NULL.
- *  "numCerts"
- *      Number of certificates in the CertChain.
- *  "pCheckers"
- *      Address where object pointer will be stored. Must be non-NULL.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Thread Safe (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns a Validate Error if the function fails in a non-fatal way.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-static PKIX_Error *
-pkix_InitializeCheckers(
-        PKIX_TrustAnchor *anchor,
-        PKIX_ProcessingParams *procParams,
-        PKIX_UInt32 numCerts,
-        PKIX_List **pCheckers,
-        void *plContext)
-{
-        PKIX_CertChainChecker *targetCertChecker = NULL;
-        PKIX_CertChainChecker *expirationChecker = NULL;
-        PKIX_CertChainChecker *nameChainingChecker = NULL;
-        PKIX_CertChainChecker *nameConstraintsChecker = NULL;
-        PKIX_CertChainChecker *basicConstraintsChecker = NULL;
-        PKIX_CertChainChecker *policyChecker = NULL;
-        PKIX_CertChainChecker *sigChecker = NULL;
-        PKIX_CertChainChecker *defaultCrlChecker = NULL;
-        PKIX_CertChainChecker *userChecker = NULL;
-        PKIX_PL_X500Name *trustedCAName = NULL;
-        PKIX_PL_PublicKey *trustedPubKey = NULL;
-        PKIX_List *checkers = NULL;
-        PKIX_PL_Date *testDate = NULL;
-        PKIX_CertSelector *certSelector = NULL;
-        PKIX_PL_Cert *trustedCert = NULL;
-        PKIX_PL_CertNameConstraints *trustedNC = NULL;
-        PKIX_List *initialPolicies = NULL;
-        PKIX_Boolean policyQualifiersRejected = PKIX_FALSE;
-        PKIX_Boolean initialPolicyMappingInhibit = PKIX_FALSE;
-        PKIX_Boolean initialAnyPolicyInhibit = PKIX_FALSE;
-        PKIX_Boolean initialExplicitPolicy = PKIX_FALSE;
-        PKIX_List *userCheckersList = NULL;
-        PKIX_List *certStores = NULL;
-        PKIX_UInt32 numCertCheckers = 0;
-        PKIX_UInt32 i;
-
-        PKIX_ENTER(VALIDATE, "pkix_InitializeCheckers");
-        PKIX_NULLCHECK_THREE(anchor, procParams, pCheckers);
-        PKIX_CHECK(PKIX_List_Create(&checkers, plContext),
-                    PKIX_LISTCREATEFAILED);
-
-        /*
-         * The TrustAnchor may have been created using CreateWithCert
-         * (in which case GetCAPublicKey and GetCAName will return NULL)
-         * or may have been created using CreateWithNameKeyPair (in which
-         * case GetTrustedCert will return NULL. So we call GetTrustedCert
-         * and populate trustedPubKey and trustedCAName accordingly.
-         */
-
-        PKIX_CHECK(PKIX_TrustAnchor_GetTrustedCert
-                (anchor, &trustedCert, plContext),
-                    PKIX_TRUSTANCHORGETTRUSTEDCERTFAILED);
-
-        if (trustedCert){
-                PKIX_CHECK(PKIX_PL_Cert_GetSubjectPublicKey
-                            (trustedCert, &trustedPubKey, plContext),
-                            PKIX_CERTGETSUBJECTPUBLICKEYFAILED);
-
-                PKIX_CHECK(PKIX_PL_Cert_GetSubject
-                            (trustedCert, &trustedCAName, plContext),
-                            PKIX_CERTGETSUBJECTFAILED);
-        } else {
-                PKIX_CHECK(PKIX_TrustAnchor_GetCAPublicKey
-                            (anchor, &trustedPubKey, plContext),
-                            PKIX_TRUSTANCHORGETCAPUBLICKEYFAILED);
-
-                PKIX_CHECK(PKIX_TrustAnchor_GetCAName
-                            (anchor, &trustedCAName, plContext),
-                            PKIX_TRUSTANCHORGETCANAMEFAILED);
-        }
-
-        PKIX_NULLCHECK_TWO(trustedPubKey, trustedCAName);
-
-        PKIX_CHECK(PKIX_TrustAnchor_GetNameConstraints
-                (anchor, &trustedNC, plContext),
-                PKIX_TRUSTANCHORGETNAMECONSTRAINTSFAILED);
-
-        PKIX_CHECK(PKIX_ProcessingParams_GetTargetCertConstraints
-                (procParams, &certSelector, plContext),
-                PKIX_PROCESSINGPARAMSGETTARGETCERTCONSTRAINTSFAILED);
-
-        PKIX_CHECK(PKIX_ProcessingParams_GetDate
-                (procParams, &testDate, plContext),
-                PKIX_PROCESSINGPARAMSGETDATEFAILED);
-
-        PKIX_CHECK(PKIX_ProcessingParams_GetInitialPolicies
-                (procParams, &initialPolicies, plContext),
-                PKIX_PROCESSINGPARAMSGETINITIALPOLICIESFAILED);
-
-        PKIX_CHECK(PKIX_ProcessingParams_GetPolicyQualifiersRejected
-                (procParams, &policyQualifiersRejected, plContext),
-                PKIX_PROCESSINGPARAMSGETPOLICYQUALIFIERSREJECTEDFAILED);
-
-        PKIX_CHECK(PKIX_ProcessingParams_IsPolicyMappingInhibited
-                (procParams, &initialPolicyMappingInhibit, plContext),
-                PKIX_PROCESSINGPARAMSISPOLICYMAPPINGINHIBITEDFAILED);
-
-        PKIX_CHECK(PKIX_ProcessingParams_IsAnyPolicyInhibited
-                (procParams, &initialAnyPolicyInhibit, plContext),
-                PKIX_PROCESSINGPARAMSISANYPOLICYINHIBITEDFAILED);
-
-        PKIX_CHECK(PKIX_ProcessingParams_IsExplicitPolicyRequired
-                (procParams, &initialExplicitPolicy, plContext),
-                PKIX_PROCESSINGPARAMSISEXPLICITPOLICYREQUIREDFAILED);
-
-        PKIX_CHECK(PKIX_ProcessingParams_GetCertStores
-                (procParams, &certStores, plContext),
-                PKIX_PROCESSINGPARAMSGETCERTSTORESFAILED);
-
-        PKIX_CHECK(PKIX_ProcessingParams_GetCertChainCheckers
-                (procParams, &userCheckersList, plContext),
-                PKIX_PROCESSINGPARAMSGETCERTCHAINCHECKERSFAILED);
-
-        /* now, initialize all the checkers */
-        PKIX_CHECK(pkix_TargetCertChecker_Initialize
-                (certSelector, numCerts, &targetCertChecker, plContext),
-                PKIX_TARGETCERTCHECKERINITIALIZEFAILED);
-
-        PKIX_CHECK(pkix_ExpirationChecker_Initialize
-                (testDate, &expirationChecker, plContext),
-                PKIX_EXPIRATIONCHECKERINITIALIZEFAILED);
-
-        PKIX_CHECK(pkix_NameChainingChecker_Initialize
-                (trustedCAName, &nameChainingChecker, plContext),
-                PKIX_NAMECHAININGCHECKERINITIALIZEFAILED);
-
-        PKIX_CHECK(pkix_NameConstraintsChecker_Initialize
-                (trustedNC, numCerts, &nameConstraintsChecker, plContext),
-                PKIX_NAMECONSTRAINTSCHECKERINITIALIZEFAILED);
-
-        PKIX_CHECK(pkix_BasicConstraintsChecker_Initialize
-                (numCerts, &basicConstraintsChecker, plContext),
-                PKIX_BASICCONSTRAINTSCHECKERINITIALIZEFAILED);
-
-        PKIX_CHECK(pkix_PolicyChecker_Initialize
-                (initialPolicies,
-                policyQualifiersRejected,
-                initialPolicyMappingInhibit,
-                initialExplicitPolicy,
-                initialAnyPolicyInhibit,
-                numCerts,
-                &policyChecker,
-                plContext),
-                PKIX_POLICYCHECKERINITIALIZEFAILED);
-
-        PKIX_CHECK(pkix_SignatureChecker_Initialize
-                    (trustedPubKey, numCerts, &sigChecker, plContext),
-                    PKIX_SIGNATURECHECKERINITIALIZEFAILED);
-
-        if (userCheckersList != NULL) {
-
-                PKIX_CHECK(PKIX_List_GetLength
-                    (userCheckersList, &numCertCheckers, plContext),
-                    PKIX_LISTGETLENGTHFAILED);
-
-                for (i = 0; i < numCertCheckers; i++) {
-
-                        PKIX_CHECK(PKIX_List_GetItem
-                            (userCheckersList,
-                            i,
-                            (PKIX_PL_Object **) &userChecker,
-                            plContext),
-                            PKIX_LISTGETITEMFAILED);
-
-                        PKIX_CHECK(PKIX_List_AppendItem
-                            (checkers,
-                            (PKIX_PL_Object *)userChecker,
-                            plContext),
-                            PKIX_LISTAPPENDITEMFAILED);
-
-                        PKIX_DECREF(userChecker);
-                }
-        }
-
-        PKIX_CHECK(PKIX_List_AppendItem
-            (checkers, (PKIX_PL_Object *)targetCertChecker, plContext),
-            PKIX_LISTAPPENDITEMFAILED);
-
-        PKIX_CHECK(PKIX_List_AppendItem
-            (checkers, (PKIX_PL_Object *)expirationChecker, plContext),
-            PKIX_LISTAPPENDITEMFAILED);
-
-        PKIX_CHECK(PKIX_List_AppendItem
-            (checkers, (PKIX_PL_Object *)nameChainingChecker, plContext),
-            PKIX_LISTAPPENDITEMFAILED);
-
-        PKIX_CHECK(PKIX_List_AppendItem
-            (checkers, (PKIX_PL_Object *)nameConstraintsChecker, plContext),
-            PKIX_LISTAPPENDITEMFAILED);
-
-        PKIX_CHECK(PKIX_List_AppendItem
-            (checkers, (PKIX_PL_Object *)basicConstraintsChecker, plContext),
-            PKIX_LISTAPPENDITEMFAILED);
-
-        PKIX_CHECK(PKIX_List_AppendItem
-            (checkers, (PKIX_PL_Object *)policyChecker, plContext),
-            PKIX_LISTAPPENDITEMFAILED);
-
-        PKIX_CHECK(PKIX_List_AppendItem
-            (checkers, (PKIX_PL_Object *)sigChecker, plContext),
-            PKIX_LISTAPPENDITEMFAILED);
-
-        *pCheckers = checkers;
-
-cleanup:
-
-        if (PKIX_ERROR_RECEIVED){
-                PKIX_DECREF(checkers);
-        }
-
-        PKIX_DECREF(certSelector);
-        PKIX_DECREF(testDate);
-        PKIX_DECREF(initialPolicies);
-        PKIX_DECREF(targetCertChecker);
-        PKIX_DECREF(expirationChecker);
-        PKIX_DECREF(nameChainingChecker);
-        PKIX_DECREF(nameConstraintsChecker);
-        PKIX_DECREF(basicConstraintsChecker);
-        PKIX_DECREF(policyChecker);
-        PKIX_DECREF(sigChecker);
-        PKIX_DECREF(trustedCAName);
-        PKIX_DECREF(trustedPubKey);
-        PKIX_DECREF(trustedNC);
-        PKIX_DECREF(trustedCert);
-        PKIX_DECREF(defaultCrlChecker);
-        PKIX_DECREF(userCheckersList);
-        PKIX_DECREF(certStores);
-        PKIX_DECREF(userChecker);
-
-        PKIX_RETURN(VALIDATE);
-}
-
-/*
- * FUNCTION: pkix_RetrieveOutputs
- * DESCRIPTION:
- *
- *  This function queries the respective states of the List of checkers in
- *  "checkers" to to obtain the final public key from the SignatureChecker
- *  and the policy tree from the PolicyChecker, storing those values at
- *  "pFinalSubjPubKey" and "pPolicyTree", respectively.
- *
- * PARAMETERS:
- *  "checkers"
- *      Address of List of checkers to be queried. Must be non-NULL.
- *  "pFinalSubjPubKey"
- *      Address where final public key will be stored. Must be non-NULL.
- *  "pPolicyTree"
- *      Address where policy tree will be stored. Must be non-NULL.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Thread Safe (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns a Validate Error if the function fails in a non-fatal way.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-static PKIX_Error *
-pkix_RetrieveOutputs(
-        PKIX_List *checkers,
-        PKIX_PL_PublicKey **pFinalSubjPubKey,
-        PKIX_PolicyNode **pPolicyTree,
-        void *plContext)
-{
-        PKIX_PL_PublicKey *finalSubjPubKey = NULL;
-        PKIX_PolicyNode *validPolicyTree = NULL;
-        PKIX_CertChainChecker *checker = NULL;
-        PKIX_PL_Object *state = NULL;
-        PKIX_UInt32 numCheckers = 0;
-        PKIX_UInt32 type;
-        PKIX_Int32 j;
-
-        PKIX_ENTER(VALIDATE, "pkix_RetrieveOutputs");
-
-        PKIX_NULLCHECK_TWO(checkers, pPolicyTree);
-
-        /*
-         * To optimize the search, we guess that the sigChecker is
-         * last in the tree and is preceded by the policyChecker. We
-         * search toward the front of the chain. Remember that List
-         * items are indexed 0..(numItems - 1).
-         */
-
-        PKIX_CHECK(PKIX_List_GetLength(checkers, &numCheckers, plContext),
-                PKIX_LISTGETLENGTHFAILED);
-
-        for (j = numCheckers - 1; j >= 0; j--){
-                PKIX_CHECK(PKIX_List_GetItem
-                        (checkers, j, (PKIX_PL_Object **)&checker, plContext),
-                        PKIX_LISTGETITEMFAILED);
-
-                PKIX_CHECK(PKIX_CertChainChecker_GetCertChainCheckerState
-                        (checker, &state, plContext),
-                        PKIX_CERTCHAINCHECKERGETCERTCHAINCHECKERSTATEFAILED);
-
-                /* user defined checker may have no state */
-                if (state != NULL) {
-
-                    PKIX_CHECK(PKIX_PL_Object_GetType(state, &type, plContext),
-                            PKIX_OBJECTGETTYPEFAILED);
-
-                    if (type == PKIX_SIGNATURECHECKERSTATE_TYPE){
-                        /* final pubKey will include any inherited DSA params */
-                        finalSubjPubKey =
-                            ((pkix_SignatureCheckerState *)state)->
-                                prevPublicKey;
-                        PKIX_INCREF(finalSubjPubKey);
-                        *pFinalSubjPubKey = finalSubjPubKey;
-                    }
-
-                    if (type == PKIX_CERTPOLICYCHECKERSTATE_TYPE) {
-                        validPolicyTree =
-                            ((PKIX_PolicyCheckerState *)state)->validPolicyTree;
-                        break;
-                    }
-                }
-
-                PKIX_DECREF(checker);
-                PKIX_DECREF(state);
-        }
-
-        PKIX_INCREF(validPolicyTree);
-        *pPolicyTree = validPolicyTree;
-
-cleanup:
-
-        PKIX_DECREF(checker);
-        PKIX_DECREF(state);
-
-        PKIX_RETURN(VALIDATE);
-
-}
-
-/*
- * FUNCTION: pkix_CheckChain
- * DESCRIPTION:
- *
- *  Checks whether the List of Certs pointed to by "certs", containing
- *  "numCerts" entries, successfully validates using each CertChainChecker in
- *  the List pointed to by "checkers" and has not been revoked, according to any
- *  of the Revocation Checkers in the List pointed to by "revChecker". Checkers
- *  are expected to remove from "removeCheckedExtOIDs" and extensions that they
- *  process. Indices to the certChain and the checkerChain are obtained and
- *  returned in "pCertCheckedIndex" and "pCheckerIndex", respectively. These
- *  should be set to zero prior to the initial call, but may be changed (and
- *  must be supplied on subsequent calls) if processing is suspended for non-
- *  blocking I/O. Each time a Cert passes from being validated by one of the
- *  CertChainCheckers to being checked by a Revocation Checker, the Boolean
- *  stored at "pRevChecking" is changed from FALSE to TRUE. If the Cert is
- *  rejected by a Revocation Checker, its reason code is returned at
- *  "pReasonCode. If the List of Certs successfully validates, the public key i
- *  the final certificate is obtained and stored at "pFinalSubjPubKey" and the
- *  validPolicyTree, which could be NULL, is stored at pPolicyTree. If the List
- *  of Certs fails to validate, an Error pointer is returned.
- *
- *  If "pVerifyTree" is non-NULL, a chain of VerifyNodes is created which
- *  tracks the results of the validation. That is, either each node in the
- *  chain has a NULL Error component, or the last node contains an Error
- *  which indicates why the validation failed.
- *
- *  The number of Certs in the List, represented by "numCerts", is used to
- *  determine which Cert is the final Cert.
- *
- * PARAMETERS:
- *  "certs"
- *      Address of List of Certs to validate. Must be non-NULL.
- *  "numCerts"
- *      Number of certificates in the List of certificates.
- *  "checkers"
- *      List of CertChainCheckers which must each validate the List of
- *      certificates. Must be non-NULL.
- *  "revChecker"
- *      List of RevocationCheckers which must each not reject the List of
- *      certificates. May be empty, but must be non-NULL.
- *  "removeCheckedExtOIDs"
- *      List of PKIX_PL_OID that has been processed. If called from building
- *      chain, it is the list of critical extension OIDs that has been
- *      processed prior to validation. Extension OIDs that may be processed by
- *      user defined checker processes are also in the list. May be NULL.
- *  "procParams"
- *      Address of ProcessingParams used to initialize various checkers. Must
- *      be non-NULL.
- *  "pCertCheckedIndex"
- *      Address where Int32 index to the Cert chain is obtained and
- *      returned. Must be non-NULL.
- *  "pCheckerIndex"
- *      Address where Int32 index to the CheckerChain is obtained and
- *      returned. Must be non-NULL.
- *  "pRevChecking"
- *      Address where Boolean is obtained and returned, indicating, if FALSE,
- *      that CertChainCheckers are being called; or, if TRUE, that RevChecker
- *      are being called. Must be non-NULL.
- *  "pReasonCode"
- *      Address where UInt32 results of revocation checking are stored. Must be
- *      non-NULL.
- *  "pNBIOContext"
- *      Address where platform-dependent context is stored if checking is
- *      suspended for non-blocking I/O. Must be non-NULL.
- *  "pFinalSubjPubKey"
- *      Address where the final public key will be stored. Must be non-NULL.
- *  "pPolicyTree"
- *      Address where the final validPolicyTree is stored. Must be non-NULL.
- *  "pVerifyTree"
- *      Address where a VerifyTree is stored, if non-NULL.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Thread Safe (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns a Validate Error if the function fails in a non-fatal way.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-PKIX_Error *
-pkix_CheckChain(
-        PKIX_List *certs,
-        PKIX_UInt32 numCerts,
-        PKIX_TrustAnchor *anchor,
-        PKIX_List *checkers,
-        PKIX_RevocationChecker *revChecker,
-        PKIX_List *removeCheckedExtOIDs,
-        PKIX_ProcessingParams *procParams,
-        PKIX_UInt32 *pCertCheckedIndex,
-        PKIX_UInt32 *pCheckerIndex,
-        PKIX_Boolean *pRevChecking,
-        PKIX_UInt32 *pReasonCode,
-        void **pNBIOContext,
-        PKIX_PL_PublicKey **pFinalSubjPubKey,
-        PKIX_PolicyNode **pPolicyTree,
-        PKIX_VerifyNode **pVerifyTree,
-        void *plContext)
-{
-        PKIX_UInt32 j = 0;
-        PKIX_Boolean revChecking = PKIX_FALSE;
-        PKIX_Error *checkCertError = NULL;
-        void *nbioContext = NULL;
-        PKIX_PL_Cert *cert = NULL;
-        PKIX_PL_Cert *issuer = NULL;
-        PKIX_PL_NssContext *nssContext = NULL;
-        CERTCertList *certList = NULL;
-        const CERTChainVerifyCallback *chainVerifyCallback = NULL;
-        CERTCertificate *nssCert = NULL;
-
-        PKIX_ENTER(VALIDATE, "pkix_CheckChain");
-        PKIX_NULLCHECK_FOUR(certs, checkers, revChecker, pCertCheckedIndex);
-        PKIX_NULLCHECK_FOUR(pCheckerIndex, pRevChecking, pReasonCode, anchor);
-        PKIX_NULLCHECK_THREE(pNBIOContext, pFinalSubjPubKey, pPolicyTree);
-
-        nbioContext = *pNBIOContext;
-        *pNBIOContext = NULL;
-        revChecking = *pRevChecking;
-        nssContext = (PKIX_PL_NssContext *)plContext;
-        chainVerifyCallback = &nssContext->chainVerifyCallback;
-
-        if (chainVerifyCallback->isChainValid != NULL) {
-                PRBool chainOK = PR_FALSE; /*assume failure*/
-                SECStatus rv;
-
-                certList = CERT_NewCertList();
-                if (certList == NULL) {
-                        PKIX_ERROR_ALLOC_ERROR();
-                }
-
-                /* Add the trust anchor to the list */
-                PKIX_CHECK(PKIX_TrustAnchor_GetTrustedCert
-                        (anchor, &cert, plContext),
-                        PKIX_TRUSTANCHORGETTRUSTEDCERTFAILED);
-
-                PKIX_CHECK(
-                        PKIX_PL_Cert_GetCERTCertificate(cert, &nssCert, plContext),
-                        PKIX_CERTGETCERTCERTIFICATEFAILED);
-
-                rv = CERT_AddCertToListHead(certList, nssCert);
-                if (rv != SECSuccess) {
-                        PKIX_ERROR_ALLOC_ERROR();
-                }
-                /* the certList takes ownership of nssCert on success */
-                nssCert = NULL;
-                PKIX_DECREF(cert);
-
-                /* Add the rest of the chain to the list */
-                for (j = *pCertCheckedIndex; j < numCerts; j++) {
-                        PKIX_CHECK(PKIX_List_GetItem(
-                                certs, j, (PKIX_PL_Object **)&cert, plContext),
-                                PKIX_LISTGETITEMFAILED);
-
-                        PKIX_CHECK(
-                                PKIX_PL_Cert_GetCERTCertificate(cert, &nssCert, plContext),
-                                PKIX_CERTGETCERTCERTIFICATEFAILED);
-
-                        rv = CERT_AddCertToListHead(certList, nssCert);
-                        if (rv != SECSuccess) {
-                                PKIX_ERROR_ALLOC_ERROR();
-                        }
-                        /* the certList takes ownership of nssCert on success */
-                        nssCert = NULL;
-                        PKIX_DECREF(cert);
-                }
-
-                rv = (*chainVerifyCallback->isChainValid)
-                     (chainVerifyCallback->isChainValidArg, certList, &chainOK);
-                if (rv != SECSuccess) {
-                       PKIX_ERROR_FATAL(PKIX_CHAINVERIFYCALLBACKFAILED);
-                }
-
-                if (!chainOK) {
-                        PKIX_ERROR(PKIX_CHAINVERIFYCALLBACKFAILED);
-                }
-
-        }
-
-        PKIX_CHECK(PKIX_TrustAnchor_GetTrustedCert
-                (anchor, &cert, plContext),
-                   PKIX_TRUSTANCHORGETTRUSTEDCERTFAILED);
-
-        for (j = *pCertCheckedIndex; j < numCerts; j++) {
-
-                PORT_Assert(cert);
-                PKIX_DECREF(issuer);
-                issuer = cert;
-                cert = NULL;
-
-                PKIX_CHECK(PKIX_List_GetItem(
-                               certs, j, (PKIX_PL_Object **)&cert, plContext),
-                           PKIX_LISTGETITEMFAILED);
-                
-                /* check if cert pointer is valid */
-                PORT_Assert(cert);
-                if (cert == NULL) {
-                    continue;
-                }
-
-                if (revChecking == PKIX_FALSE) {
-
-                        PKIX_CHECK(pkix_CheckCert
-                                (cert,
-                                checkers,
-                                removeCheckedExtOIDs,
-                                pCheckerIndex,
-                                &nbioContext,
-                                plContext),
-                                PKIX_CHECKCERTFAILED);
-
-                        if (nbioContext != NULL) {
-                                *pCertCheckedIndex = j;
-                                *pRevChecking = revChecking;
-                                *pNBIOContext = nbioContext;
-                                goto cleanup;
-                        }
-
-                        revChecking = PKIX_TRUE;
-                        *pCheckerIndex = 0;
-                }
-
-                if (revChecking == PKIX_TRUE) {
-                        PKIX_RevocationStatus revStatus;
-                        pkixErrorResult =
-                            PKIX_RevocationChecker_Check(
-                                      cert, issuer, revChecker,
-                                      procParams, PKIX_TRUE,
-                                      (j == numCerts - 1) ? PKIX_TRUE : PKIX_FALSE,
-                                      &revStatus, pReasonCode,
-                                      &nbioContext, plContext);
-                        if (nbioContext != NULL) {
-                                *pCertCheckedIndex = j;
-                                *pRevChecking = revChecking;
-                                *pNBIOContext = nbioContext;
-                                goto cleanup;
-                        }
-                        if (revStatus == PKIX_RevStatus_Revoked ||
-                            pkixErrorResult) {
-                            if (!pkixErrorResult) {
-                                /* if pkixErrorResult is returned then
-                                 * use it as it has a detailed revocation
-                                 * error code. Otherwise create a new error */
-                                PKIX_ERROR_CREATE(VALIDATE,
-                                                  PKIX_CERTIFICATEREVOKED,
-                                                  pkixErrorResult);
-                            }
-                            goto cleanup;
-                        }
-                        revChecking = PKIX_FALSE;
-                        *pCheckerIndex = 0;
-                }
-
-                PKIX_CHECK(pkix_AddToVerifyLog
-                        (cert, j, NULL, pVerifyTree, plContext),
-                        PKIX_ADDTOVERIFYLOGFAILED);
-        }
-
-        PKIX_CHECK(pkix_RetrieveOutputs
-                    (checkers, pFinalSubjPubKey, pPolicyTree, plContext),
-                    PKIX_RETRIEVEOUTPUTSFAILED);
-
-        *pNBIOContext = NULL;
-
-cleanup:
-        if (PKIX_ERROR_RECEIVED && cert) {
-            checkCertError = pkixErrorResult;
-            
-            PKIX_CHECK_FATAL(
-                pkix_AddToVerifyLog(cert, j, checkCertError, pVerifyTree,
-                                    plContext),
-                PKIX_ADDTOVERIFYLOGFAILED);
-            pkixErrorResult = checkCertError;
-            pkixErrorCode = pkixErrorResult->errCode;
-            checkCertError = NULL;
-        }
-
-fatal:
-        if (nssCert) {
-                CERT_DestroyCertificate(nssCert);
-        }
-
-        if (certList) {
-                CERT_DestroyCertList(certList);
-        }
-
-        PKIX_DECREF(checkCertError);
-        PKIX_DECREF(cert);
-        PKIX_DECREF(issuer);
-
-        PKIX_RETURN(VALIDATE);
-}
-
-/*
- * FUNCTION: pkix_ExtractParameters
- * DESCRIPTION:
- *
- *  Extracts several parameters from the ValidateParams object pointed to by
- *  "valParams" and stores the CertChain at "pChain", the List of Certs at
- *  "pCerts", the number of Certs in the chain at "pNumCerts", the
- *  ProcessingParams object at "pProcParams", the List of TrustAnchors at
- *  "pAnchors", and the number of TrustAnchors at "pNumAnchors".
- *
- * PARAMETERS:
- *  "valParams"
- *      Address of ValidateParams from which the parameters are extracted.
- *      Must be non-NULL.
- *  "pCerts"
- *      Address where object pointer for List of Certs will be stored.
- *      Must be non-NULL.
- *  "pNumCerts"
- *      Address where number of Certs will be stored. Must be non-NULL.
- *  "pProcParams"
- *      Address where object pointer for ProcessingParams will be stored.
- *      Must be non-NULL.
- *  "pAnchors"
- *      Address where object pointer for List of Anchors will be stored.
- *      Must be non-NULL.
- *  "pNumAnchors"
- *      Address where number of Anchors will be stored. Must be non-NULL.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Thread Safe (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns a Validate Error if the function fails in a non-fatal way.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-static PKIX_Error *
-pkix_ExtractParameters(
-        PKIX_ValidateParams *valParams,
-        PKIX_List **pCerts,
-        PKIX_UInt32 *pNumCerts,
-        PKIX_ProcessingParams **pProcParams,
-        PKIX_List **pAnchors,
-        PKIX_UInt32 *pNumAnchors,
-        void *plContext)
-{
-        PKIX_ENTER(VALIDATE, "pkix_ExtractParameters");
-        PKIX_NULLCHECK_THREE(valParams, pCerts, pNumCerts);
-        PKIX_NULLCHECK_THREE(pProcParams, pAnchors, pNumAnchors);
-
-        /* extract relevant parameters from chain */
-        PKIX_CHECK(PKIX_ValidateParams_GetCertChain
-                (valParams, pCerts, plContext),
-                PKIX_VALIDATEPARAMSGETCERTCHAINFAILED);
-
-        PKIX_CHECK(PKIX_List_GetLength(*pCerts, pNumCerts, plContext),
-                PKIX_LISTGETLENGTHFAILED);
-
-        /* extract relevant parameters from procParams */
-        PKIX_CHECK(PKIX_ValidateParams_GetProcessingParams
-                (valParams, pProcParams, plContext),
-                PKIX_VALIDATEPARAMSGETPROCESSINGPARAMSFAILED);
-
-        PKIX_CHECK(PKIX_ProcessingParams_GetTrustAnchors
-                (*pProcParams, pAnchors, plContext),
-                PKIX_PROCESSINGPARAMSGETTRUSTANCHORSFAILED);
-
-        PKIX_CHECK(PKIX_List_GetLength(*pAnchors, pNumAnchors, plContext),
-                PKIX_LISTGETLENGTHFAILED);
-
-cleanup:
-
-        PKIX_RETURN(VALIDATE);
-}
-
-/* --Public-Functions--------------------------------------------- */
-
-/*
- * FUNCTION: PKIX_ValidateChain (see comments in pkix.h)
- */
-PKIX_Error *
-PKIX_ValidateChain(
-        PKIX_ValidateParams *valParams,
-        PKIX_ValidateResult **pResult,
-        PKIX_VerifyNode **pVerifyTree,
-        void *plContext)
-{
-        PKIX_Error *chainFailed = NULL;
-
-        PKIX_ProcessingParams *procParams = NULL;
-        PKIX_CertChainChecker *userChecker = NULL;
-        PKIX_RevocationChecker *revChecker = NULL;
-        PKIX_List *certs = NULL;
-        PKIX_List *checkers = NULL;
-        PKIX_List *anchors = NULL;
-        PKIX_List *userCheckers = NULL;
-        PKIX_List *userCheckerExtOIDs = NULL;
-        PKIX_List *validateCheckedCritExtOIDsList = NULL;
-        PKIX_TrustAnchor *anchor = NULL;
-        PKIX_ValidateResult *valResult = NULL;
-        PKIX_PL_PublicKey *finalPubKey = NULL;
-        PKIX_PolicyNode *validPolicyTree = NULL;
-        PKIX_Boolean supportForwarding = PKIX_FALSE;
-        PKIX_Boolean revChecking = PKIX_FALSE;
-        PKIX_UInt32 i, numCerts, numAnchors;
-        PKIX_UInt32 numUserCheckers = 0;
-        PKIX_UInt32 certCheckedIndex = 0;
-        PKIX_UInt32 checkerIndex = 0;
-        PKIX_UInt32 reasonCode = 0;
-        void *nbioContext = NULL;
-
-        PKIX_ENTER(VALIDATE, "PKIX_ValidateChain");
-        PKIX_NULLCHECK_TWO(valParams, pResult);
-
-        /* extract various parameters from valParams */
-        PKIX_CHECK(pkix_ExtractParameters
-                    (valParams,
-                    &certs,
-                    &numCerts,
-                    &procParams,
-                    &anchors,
-                    &numAnchors,
-                    plContext),
-                    PKIX_EXTRACTPARAMETERSFAILED);
-
-        /*
-         * setup an extension OID list that user had defined for his checker
-         * processing. User checker is not responsible for taking out OIDs
-         * from unresolved critical extension list as the libpkix checker
-         * is doing. Here we add those user checkers' OIDs to the removal
-         * list to be taken out by CheckChain
-         */
-        PKIX_CHECK(PKIX_ProcessingParams_GetCertChainCheckers
-                    (procParams, &userCheckers, plContext),
-                    PKIX_PROCESSINGPARAMSGETCERTCHAINCHECKERSFAILED);
-
-        if (userCheckers != NULL) {
-
-                PKIX_CHECK(PKIX_List_Create
-                    (&validateCheckedCritExtOIDsList,
-                    plContext),
-                    PKIX_LISTCREATEFAILED);
-
-                PKIX_CHECK(PKIX_List_GetLength
-                    (userCheckers, &numUserCheckers, plContext),
-                    PKIX_LISTGETLENGTHFAILED);
-
-                for (i = 0; i < numUserCheckers; i++) {
-
-                    PKIX_CHECK(PKIX_List_GetItem
-                        (userCheckers,
-                        i,
-                        (PKIX_PL_Object **) &userChecker,
-                        plContext),
-                        PKIX_LISTGETITEMFAILED);
-
-                    PKIX_CHECK
-                        (PKIX_CertChainChecker_IsForwardCheckingSupported
-                        (userChecker, &supportForwarding, plContext),
-                        PKIX_CERTCHAINCHECKERISFORWARDCHECKINGSUPPORTEDFAILED);
-
-                    if (supportForwarding == PKIX_FALSE) {
-
-                        PKIX_CHECK
-                            (PKIX_CertChainChecker_GetSupportedExtensions
-                            (userChecker, &userCheckerExtOIDs, plContext),
-                            PKIX_CERTCHAINCHECKERGETSUPPORTEDEXTENSIONSFAILED);
-
-                        if (userCheckerExtOIDs != NULL) {
-                            PKIX_CHECK(pkix_List_AppendList
-                                (validateCheckedCritExtOIDsList,
-                                userCheckerExtOIDs,
-                                plContext),
-                                PKIX_LISTAPPENDLISTFAILED);
-                        }
-                    }
-
-                    PKIX_DECREF(userCheckerExtOIDs);
-                    PKIX_DECREF(userChecker);
-                }
-        }
-
-        PKIX_CHECK(PKIX_ProcessingParams_GetRevocationChecker
-                (procParams, &revChecker, plContext),
-                PKIX_PROCESSINGPARAMSGETREVOCATIONCHECKERFAILED);
-
-        /* try to validate the chain with each anchor */
-        for (i = 0; i < numAnchors; i++){
-
-                /* get trust anchor */
-                PKIX_CHECK(PKIX_List_GetItem
-                        (anchors, i, (PKIX_PL_Object **)&anchor, plContext),
-                        PKIX_LISTGETITEMFAILED);
-
-                /* initialize checkers using information from trust anchor */
-                PKIX_CHECK(pkix_InitializeCheckers
-                        (anchor, procParams, numCerts, &checkers, plContext),
-                        PKIX_INITIALIZECHECKERSFAILED);
-
-                /*
-                 * Validate the chain using this trust anchor and these
-                 * checkers. (WARNING: checkers that use non-blocking I/O
-                 * are not currently supported.)
-                 */
-                certCheckedIndex = 0;
-                checkerIndex = 0;
-                revChecking = PKIX_FALSE;
-                chainFailed = pkix_CheckChain
-                        (certs,
-                        numCerts,
-                        anchor,
-                        checkers,
-                        revChecker,
-                        validateCheckedCritExtOIDsList,
-                        procParams,
-                        &certCheckedIndex,
-                        &checkerIndex,
-                        &revChecking,
-                        &reasonCode,
-                        &nbioContext,
-                        &finalPubKey,
-                        &validPolicyTree,
-                        pVerifyTree,
-                        plContext);
-
-                if (chainFailed || (reasonCode != 0)) {
-
-                        /* cert chain failed to validate */
-
-                        PKIX_DECREF(chainFailed);
-                        PKIX_DECREF(anchor);
-                        PKIX_DECREF(checkers);
-                        PKIX_DECREF(validPolicyTree);
-
-                        /* if last anchor, we fail; else, we try next anchor */
-                        if (i == (numAnchors - 1)) { /* last anchor */
-                                PKIX_ERROR(PKIX_VALIDATECHAINFAILED);
-                        }
-
-                } else {
-
-                        /* cert chain successfully validated! */
-                        PKIX_CHECK(pkix_ValidateResult_Create
-                                (finalPubKey,
-                                anchor,
-                                validPolicyTree,
-                                &valResult,
-                                plContext),
-                                PKIX_VALIDATERESULTCREATEFAILED);
-
-                        *pResult = valResult;
-
-                        /* no need to try any more anchors in the loop */
-                        goto cleanup;
-                }
-        }
-
-cleanup:
-
-        PKIX_DECREF(finalPubKey);
-        PKIX_DECREF(certs);
-        PKIX_DECREF(anchors);
-        PKIX_DECREF(anchor);
-        PKIX_DECREF(checkers);
-        PKIX_DECREF(revChecker);
-        PKIX_DECREF(validPolicyTree);
-        PKIX_DECREF(chainFailed);
-        PKIX_DECREF(procParams);
-        PKIX_DECREF(userCheckers);
-        PKIX_DECREF(validateCheckedCritExtOIDsList);
-
-        PKIX_RETURN(VALIDATE);
-}
-
-/*
- * FUNCTION: pkix_Validate_BuildUserOIDs
- * DESCRIPTION:
- *
- *  This function creates a List of the OIDs that are processed by the user
- *  checkers in the List pointed to by "userCheckers", storing the resulting
- *  List at "pUserCritOIDs". If the List of userCheckers is NULL, the output
- *  List will be NULL. Otherwise the output List will be non-NULL, but may be
- *  empty.
- *
- * PARAMETERS:
- *  "userCheckers"
- *      The address of the List of userCheckers.
- *  "pUserCritOIDs"
- *      The address at which the List is stored. Must be non-NULL.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Thread Safe (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns a VALIDATE Error if the function fails in a non-fatal way.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-static PKIX_Error *
-pkix_Validate_BuildUserOIDs(
-        PKIX_List *userCheckers,
-        PKIX_List **pUserCritOIDs,
-        void *plContext)
-{
-        PKIX_UInt32 numUserCheckers = 0;
-        PKIX_UInt32 i = 0;
-        PKIX_List *userCritOIDs = NULL;
-        PKIX_List *userCheckerExtOIDs = NULL;
-        PKIX_Boolean supportForwarding = PKIX_FALSE;
-        PKIX_CertChainChecker *userChecker = NULL;
-
-        PKIX_ENTER(VALIDATE, "pkix_Validate_BuildUserOIDs");
-        PKIX_NULLCHECK_ONE(pUserCritOIDs);
-
-        if (userCheckers != NULL) {
-            PKIX_CHECK(PKIX_List_Create(&userCritOIDs, plContext),
-                PKIX_LISTCREATEFAILED);
-
-            PKIX_CHECK(PKIX_List_GetLength
-                (userCheckers, &numUserCheckers, plContext),
-                PKIX_LISTGETLENGTHFAILED);
-
-            for (i = 0; i < numUserCheckers; i++) {
-                PKIX_CHECK(PKIX_List_GetItem
-                    (userCheckers,
-                    i,
-                    (PKIX_PL_Object **) &userChecker,
-                    plContext),
-                    PKIX_LISTGETITEMFAILED);
-
-                PKIX_CHECK(PKIX_CertChainChecker_IsForwardCheckingSupported
-                    (userChecker, &supportForwarding, plContext),
-                    PKIX_CERTCHAINCHECKERISFORWARDCHECKINGSUPPORTEDFAILED);
-
-                if (supportForwarding == PKIX_FALSE) {
-
-                    PKIX_CHECK(PKIX_CertChainChecker_GetSupportedExtensions
-                        (userChecker, &userCheckerExtOIDs, plContext),
-                        PKIX_CERTCHAINCHECKERGETSUPPORTEDEXTENSIONSFAILED);
-
-                    if (userCheckerExtOIDs != NULL) {
-                        PKIX_CHECK(pkix_List_AppendList
-                            (userCritOIDs, userCheckerExtOIDs, plContext),
-                            PKIX_LISTAPPENDLISTFAILED);
-                    }
-                }
-
-                PKIX_DECREF(userCheckerExtOIDs);
-                PKIX_DECREF(userChecker);
-            }
-        }
-
-        *pUserCritOIDs = userCritOIDs;
-
-cleanup:
-
-        if (PKIX_ERROR_RECEIVED){
-                PKIX_DECREF(userCritOIDs);
-        }
-
-        PKIX_DECREF(userCheckerExtOIDs);
-        PKIX_DECREF(userChecker);
-
-        PKIX_RETURN(VALIDATE);
-}
-
-/*
- * FUNCTION: PKIX_ValidateChain_nb (see comments in pkix.h)
- */
-PKIX_Error *
-PKIX_ValidateChain_NB(
-        PKIX_ValidateParams *valParams,
-        PKIX_UInt32 *pCertIndex,
-        PKIX_UInt32 *pAnchorIndex,
-        PKIX_UInt32 *pCheckerIndex,
-        PKIX_Boolean *pRevChecking,
-        PKIX_List **pCheckers,
-        void **pNBIOContext,
-        PKIX_ValidateResult **pResult,
-        PKIX_VerifyNode **pVerifyTree,
-        void *plContext)
-{
-        PKIX_UInt32 numCerts = 0;
-        PKIX_UInt32 numAnchors = 0;
-        PKIX_UInt32 i = 0;
-        PKIX_UInt32 certIndex = 0;
-        PKIX_UInt32 anchorIndex = 0;
-        PKIX_UInt32 checkerIndex = 0;
-        PKIX_UInt32 reasonCode = 0;
-        PKIX_Boolean revChecking = PKIX_FALSE;
-        PKIX_List *certs = NULL;
-        PKIX_List *anchors = NULL;
-        PKIX_List *checkers = NULL;
-        PKIX_List *userCheckers = NULL;
-        PKIX_List *validateCheckedCritExtOIDsList = NULL;
-        PKIX_TrustAnchor *anchor = NULL;
-        PKIX_ValidateResult *valResult = NULL;
-        PKIX_PL_PublicKey *finalPubKey = NULL;
-        PKIX_PolicyNode *validPolicyTree = NULL;
-        PKIX_ProcessingParams *procParams = NULL;
-        PKIX_RevocationChecker *revChecker = NULL;
-        PKIX_Error *chainFailed = NULL;
-        void *nbioContext = NULL;
-
-        PKIX_ENTER(VALIDATE, "PKIX_ValidateChain_NB");
-        PKIX_NULLCHECK_FOUR
-                (valParams, pCertIndex, pAnchorIndex, pCheckerIndex);
-        PKIX_NULLCHECK_FOUR(pRevChecking, pCheckers, pNBIOContext, pResult);
-
-        nbioContext = *pNBIOContext;
-        *pNBIOContext = NULL;
-
-        /* extract various parameters from valParams */
-        PKIX_CHECK(pkix_ExtractParameters
-                    (valParams,
-                    &certs,
-                    &numCerts,
-                    &procParams,
-                    &anchors,
-                    &numAnchors,
-                    plContext),
-                    PKIX_EXTRACTPARAMETERSFAILED);
-
-        /*
-         * Create a List of the OIDs that will be processed by the user
-         * checkers. User checkers are not responsible for removing OIDs from
-         * the List of unresolved critical extensions, as libpkix checkers are.
-         * So we add those user checkers' OIDs to the removal list to be taken
-         * out by CheckChain.
-         */
-        PKIX_CHECK(PKIX_ProcessingParams_GetCertChainCheckers
-                (procParams, &userCheckers, plContext),
-                PKIX_PROCESSINGPARAMSGETCERTCHAINCHECKERSFAILED);
-
-        PKIX_CHECK(pkix_Validate_BuildUserOIDs
-                (userCheckers, &validateCheckedCritExtOIDsList, plContext),
-                PKIX_VALIDATEBUILDUSEROIDSFAILED);
-
-        PKIX_CHECK(PKIX_ProcessingParams_GetRevocationChecker
-                (procParams, &revChecker, plContext),
-                PKIX_PROCESSINGPARAMSGETREVOCATIONCHECKERFAILED);
-
-        /* Are we resuming after a WOULDBLOCK return, or starting anew ? */
-        if (nbioContext != NULL) {
-                /* Resuming */
-                certIndex = *pCertIndex;
-                anchorIndex = *pAnchorIndex;
-                checkerIndex = *pCheckerIndex;
-                revChecking = *pRevChecking;
-                checkers = *pCheckers;
-                *pCheckers = NULL;
-        }
-
-        /* try to validate the chain with each anchor */
-        for (i = anchorIndex; i < numAnchors; i++) {
-
-                /* get trust anchor */
-                PKIX_CHECK(PKIX_List_GetItem
-                        (anchors, i, (PKIX_PL_Object **)&anchor, plContext),
-                        PKIX_LISTGETITEMFAILED);
-
-                /* initialize checkers using information from trust anchor */
-                if (nbioContext == NULL) {
-                        PKIX_CHECK(pkix_InitializeCheckers
-                                (anchor,
-                                procParams,
-                                numCerts,
-                                &checkers,
-                                plContext),
-                                PKIX_INITIALIZECHECKERSFAILED);
-                }
-
-                /*
-                 * Validate the chain using this trust anchor and these
-                 * checkers.
-                 */
-                chainFailed = pkix_CheckChain
-                        (certs,
-                        numCerts,
-                        anchor,
-                        checkers,
-                        revChecker,
-                        validateCheckedCritExtOIDsList,
-                        procParams,
-                        &certIndex,
-                        &checkerIndex,
-                        &revChecking,
-                        &reasonCode,
-                        &nbioContext,
-                        &finalPubKey,
-                        &validPolicyTree,
-                        pVerifyTree,
-                        plContext);
-
-                if (nbioContext != NULL) {
-                        *pCertIndex = certIndex;
-                        *pAnchorIndex = anchorIndex;
-                        *pCheckerIndex = checkerIndex;
-                        *pRevChecking = revChecking;
-                        PKIX_INCREF(checkers);
-                        *pCheckers = checkers;
-                        *pNBIOContext = nbioContext;
-                        goto cleanup;
-                }
-
-                if (chainFailed || (reasonCode != 0)) {
-
-                        /* cert chain failed to validate */
-
-                        PKIX_DECREF(chainFailed);
-                        PKIX_DECREF(anchor);
-                        PKIX_DECREF(checkers);
-                        PKIX_DECREF(validPolicyTree);
-
-                        /* if last anchor, we fail; else, we try next anchor */
-                        if (i == (numAnchors - 1)) { /* last anchor */
-                                PKIX_ERROR(PKIX_VALIDATECHAINFAILED);
-                        }
-
-                } else {
-
-                        /* cert chain successfully validated! */
-                        PKIX_CHECK(pkix_ValidateResult_Create
-                                (finalPubKey,
-                                anchor,
-                                validPolicyTree,
-                                &valResult,
-                                plContext),
-                                PKIX_VALIDATERESULTCREATEFAILED);
-
-                        *pResult = valResult;
-
-                        /* no need to try any more anchors in the loop */
-                        goto cleanup;
-                }
-        }
-
-cleanup:
-
-        PKIX_DECREF(finalPubKey);
-        PKIX_DECREF(certs);
-        PKIX_DECREF(anchors);
-        PKIX_DECREF(anchor);
-        PKIX_DECREF(checkers);
-        PKIX_DECREF(revChecker);
-        PKIX_DECREF(validPolicyTree);
-        PKIX_DECREF(chainFailed);
-        PKIX_DECREF(procParams);
-        PKIX_DECREF(userCheckers);
-        PKIX_DECREF(validateCheckedCritExtOIDsList);
-
-        PKIX_RETURN(VALIDATE);
-}