diff options
Diffstat (limited to 'security/nss/lib/certdb/crl.c')
| -rw-r--r-- | security/nss/lib/certdb/crl.c | 3003 |
1 files changed, 0 insertions, 3003 deletions
diff --git a/security/nss/lib/certdb/crl.c b/security/nss/lib/certdb/crl.c deleted file mode 100644 index 7cd308c0a..000000000 --- a/security/nss/lib/certdb/crl.c +++ /dev/null @@ -1,3003 +0,0 @@ -/* ***** BEGIN LICENSE BLOCK ***** - * Version: MPL 1.1/GPL 2.0/LGPL 2.1 - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. You may obtain a copy of the License at - * http://www.mozilla.org/MPL/ - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - * - * The Original Code is the Netscape security libraries. - * - * The Initial Developer of the Original Code is - * Netscape Communications Corporation. - * Portions created by the Initial Developer are Copyright (C) 1994-2000 - * the Initial Developer. All Rights Reserved. - * - * Contributor(s): - * - * Alternatively, the contents of this file may be used under the terms of - * either the GNU General Public License Version 2 or later (the "GPL"), or - * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), - * in which case the provisions of the GPL or the LGPL are applicable instead - * of those above. If you wish to allow use of your version of this file only - * under the terms of either the GPL or the LGPL, and not to allow others to - * use your version of this file under the terms of the MPL, indicate your - * decision by deleting the provisions above and replace them with the notice - * and other provisions required by the GPL or the LGPL. If you do not delete - * the provisions above, a recipient may use your version of this file under - * the terms of any one of the MPL, the GPL or the LGPL. - * - * ***** END LICENSE BLOCK ***** */ - -/* - * Moved from secpkcs7.c - * - * $Id$ - */ - -#include "cert.h" -#include "certi.h" -#include "secder.h" -#include "secasn1.h" -#include "secoid.h" -#include "certdb.h" -#include "certxutl.h" -#include "prtime.h" -#include "secerr.h" -#include "pk11func.h" -#include "dev.h" -#include "dev3hack.h" -#include "nssbase.h" -#if defined(DPC_RWLOCK) || defined(GLOBAL_RWLOCK) -#include "nssrwlk.h" -#endif -#include "pk11priv.h" - -const SEC_ASN1Template SEC_CERTExtensionTemplate[] = { - { SEC_ASN1_SEQUENCE, - 0, NULL, sizeof(CERTCertExtension) }, - { SEC_ASN1_OBJECT_ID, - offsetof(CERTCertExtension,id) }, - { SEC_ASN1_OPTIONAL | SEC_ASN1_BOOLEAN, /* XXX DER_DEFAULT */ - offsetof(CERTCertExtension,critical), }, - { SEC_ASN1_OCTET_STRING, - offsetof(CERTCertExtension,value) }, - { 0, } -}; - -static const SEC_ASN1Template SEC_CERTExtensionsTemplate[] = { - { SEC_ASN1_SEQUENCE_OF, 0, SEC_CERTExtensionTemplate} -}; - -/* - * XXX Also, these templates, especially the Krl/FORTEZZA ones, need to - * be tested; Lisa did the obvious translation but they still should be - * verified. - */ - -const SEC_ASN1Template CERT_IssuerAndSNTemplate[] = { - { SEC_ASN1_SEQUENCE, - 0, NULL, sizeof(CERTIssuerAndSN) }, - { SEC_ASN1_SAVE, - offsetof(CERTIssuerAndSN,derIssuer) }, - { SEC_ASN1_INLINE, - offsetof(CERTIssuerAndSN,issuer), - CERT_NameTemplate }, - { SEC_ASN1_INTEGER, - offsetof(CERTIssuerAndSN,serialNumber) }, - { 0 } -}; - -static const SEC_ASN1Template cert_KrlEntryTemplate[] = { - { SEC_ASN1_SEQUENCE, - 0, NULL, sizeof(CERTCrlEntry) }, - { SEC_ASN1_OCTET_STRING, - offsetof(CERTCrlEntry,serialNumber) }, - { SEC_ASN1_UTC_TIME, - offsetof(CERTCrlEntry,revocationDate) }, - { 0 } -}; - -static const SEC_ASN1Template cert_KrlTemplate[] = { - { SEC_ASN1_SEQUENCE, - 0, NULL, sizeof(CERTCrl) }, - { SEC_ASN1_INLINE, - offsetof(CERTCrl,signatureAlg), - SECOID_AlgorithmIDTemplate }, - { SEC_ASN1_SAVE, - offsetof(CERTCrl,derName) }, - { SEC_ASN1_INLINE, - offsetof(CERTCrl,name), - CERT_NameTemplate }, - { SEC_ASN1_UTC_TIME, - offsetof(CERTCrl,lastUpdate) }, - { SEC_ASN1_UTC_TIME, - offsetof(CERTCrl,nextUpdate) }, - { SEC_ASN1_OPTIONAL | SEC_ASN1_SEQUENCE_OF, - offsetof(CERTCrl,entries), - cert_KrlEntryTemplate }, - { 0 } -}; - -static const SEC_ASN1Template cert_SignedKrlTemplate[] = { - { SEC_ASN1_SEQUENCE, - 0, NULL, sizeof(CERTSignedCrl) }, - { SEC_ASN1_SAVE, - offsetof(CERTSignedCrl,signatureWrap.data) }, - { SEC_ASN1_INLINE, - offsetof(CERTSignedCrl,crl), - cert_KrlTemplate }, - { SEC_ASN1_INLINE, - offsetof(CERTSignedCrl,signatureWrap.signatureAlgorithm), - SECOID_AlgorithmIDTemplate }, - { SEC_ASN1_BIT_STRING, - offsetof(CERTSignedCrl,signatureWrap.signature) }, - { 0 } -}; - -static const SEC_ASN1Template cert_CrlKeyTemplate[] = { - { SEC_ASN1_SEQUENCE, - 0, NULL, sizeof(CERTCrlKey) }, - { SEC_ASN1_INTEGER | SEC_ASN1_OPTIONAL, offsetof(CERTCrlKey,dummy) }, - { SEC_ASN1_SKIP }, - { SEC_ASN1_ANY, offsetof(CERTCrlKey,derName) }, - { SEC_ASN1_SKIP_REST }, - { 0 } -}; - -static const SEC_ASN1Template cert_CrlEntryTemplate[] = { - { SEC_ASN1_SEQUENCE, - 0, NULL, sizeof(CERTCrlEntry) }, - { SEC_ASN1_INTEGER, - offsetof(CERTCrlEntry,serialNumber) }, - { SEC_ASN1_INLINE, - offsetof(CERTCrlEntry,revocationDate), CERT_TimeChoiceTemplate }, - { SEC_ASN1_OPTIONAL | SEC_ASN1_SEQUENCE_OF, - offsetof(CERTCrlEntry, extensions), - SEC_CERTExtensionTemplate}, - { 0 } -}; - -const SEC_ASN1Template CERT_CrlTemplate[] = { - { SEC_ASN1_SEQUENCE, - 0, NULL, sizeof(CERTCrl) }, - { SEC_ASN1_INTEGER | SEC_ASN1_OPTIONAL, offsetof (CERTCrl, version) }, - { SEC_ASN1_INLINE, - offsetof(CERTCrl,signatureAlg), - SECOID_AlgorithmIDTemplate }, - { SEC_ASN1_SAVE, - offsetof(CERTCrl,derName) }, - { SEC_ASN1_INLINE, - offsetof(CERTCrl,name), - CERT_NameTemplate }, - { SEC_ASN1_INLINE, - offsetof(CERTCrl,lastUpdate), CERT_TimeChoiceTemplate }, - { SEC_ASN1_INLINE | SEC_ASN1_OPTIONAL, - offsetof(CERTCrl,nextUpdate), CERT_TimeChoiceTemplate }, - { SEC_ASN1_OPTIONAL | SEC_ASN1_SEQUENCE_OF, - offsetof(CERTCrl,entries), - cert_CrlEntryTemplate }, - { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC | - SEC_ASN1_EXPLICIT | 0, - offsetof(CERTCrl,extensions), - SEC_CERTExtensionsTemplate}, - { 0 } -}; - -const SEC_ASN1Template CERT_CrlTemplateNoEntries[] = { - { SEC_ASN1_SEQUENCE, - 0, NULL, sizeof(CERTCrl) }, - { SEC_ASN1_INTEGER | SEC_ASN1_OPTIONAL, offsetof (CERTCrl, version) }, - { SEC_ASN1_INLINE, - offsetof(CERTCrl,signatureAlg), - SECOID_AlgorithmIDTemplate }, - { SEC_ASN1_SAVE, - offsetof(CERTCrl,derName) }, - { SEC_ASN1_INLINE, - offsetof(CERTCrl,name), - CERT_NameTemplate }, - { SEC_ASN1_INLINE, - offsetof(CERTCrl,lastUpdate), CERT_TimeChoiceTemplate }, - { SEC_ASN1_INLINE | SEC_ASN1_OPTIONAL, - offsetof(CERTCrl,nextUpdate), CERT_TimeChoiceTemplate }, - { SEC_ASN1_OPTIONAL | SEC_ASN1_SEQUENCE_OF | - SEC_ASN1_SKIP }, /* skip entries */ - { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC | - SEC_ASN1_EXPLICIT | 0, - offsetof(CERTCrl,extensions), - SEC_CERTExtensionsTemplate }, - { 0 } -}; - -const SEC_ASN1Template CERT_CrlTemplateEntriesOnly[] = { - { SEC_ASN1_SEQUENCE, - 0, NULL, sizeof(CERTCrl) }, - { SEC_ASN1_SKIP | SEC_ASN1_INTEGER | SEC_ASN1_OPTIONAL }, - { SEC_ASN1_SKIP }, - { SEC_ASN1_SKIP }, - { SEC_ASN1_SKIP | SEC_ASN1_INLINE, - offsetof(CERTCrl,lastUpdate), CERT_TimeChoiceTemplate }, - { SEC_ASN1_SKIP | SEC_ASN1_INLINE | SEC_ASN1_OPTIONAL, - offsetof(CERTCrl,nextUpdate), CERT_TimeChoiceTemplate }, - { SEC_ASN1_OPTIONAL | SEC_ASN1_SEQUENCE_OF, - offsetof(CERTCrl,entries), - cert_CrlEntryTemplate }, /* decode entries */ - { SEC_ASN1_SKIP_REST }, - { 0 } -}; - -const SEC_ASN1Template CERT_SignedCrlTemplate[] = { - { SEC_ASN1_SEQUENCE, - 0, NULL, sizeof(CERTSignedCrl) }, - { SEC_ASN1_SAVE, - offsetof(CERTSignedCrl,signatureWrap.data) }, - { SEC_ASN1_INLINE, - offsetof(CERTSignedCrl,crl), - CERT_CrlTemplate }, - { SEC_ASN1_INLINE, - offsetof(CERTSignedCrl,signatureWrap.signatureAlgorithm), - SECOID_AlgorithmIDTemplate }, - { SEC_ASN1_BIT_STRING, - offsetof(CERTSignedCrl,signatureWrap.signature) }, - { 0 } -}; - -static const SEC_ASN1Template cert_SignedCrlTemplateNoEntries[] = { - { SEC_ASN1_SEQUENCE, - 0, NULL, sizeof(CERTSignedCrl) }, - { SEC_ASN1_SAVE, - offsetof(CERTSignedCrl,signatureWrap.data) }, - { SEC_ASN1_INLINE, - offsetof(CERTSignedCrl,crl), - CERT_CrlTemplateNoEntries }, - { SEC_ASN1_INLINE, - offsetof(CERTSignedCrl,signatureWrap.signatureAlgorithm), - SECOID_AlgorithmIDTemplate }, - { SEC_ASN1_BIT_STRING, - offsetof(CERTSignedCrl,signatureWrap.signature) }, - { 0 } -}; - -const SEC_ASN1Template CERT_SetOfSignedCrlTemplate[] = { - { SEC_ASN1_SET_OF, 0, CERT_SignedCrlTemplate }, -}; - -/* get CRL version */ -int cert_get_crl_version(CERTCrl * crl) -{ - /* CRL version is defaulted to v1 */ - int version = SEC_CRL_VERSION_1; - if (crl && crl->version.data != 0) { - version = (int)DER_GetUInteger (&crl->version); - } - return version; -} - - -/* check the entries in the CRL */ -SECStatus cert_check_crl_entries (CERTCrl *crl) -{ - CERTCrlEntry **entries; - CERTCrlEntry *entry; - PRBool hasCriticalExten = PR_FALSE; - SECStatus rv = SECSuccess; - - if (!crl) { - return SECFailure; - } - - if (crl->entries == NULL) { - /* CRLs with no entries are valid */ - return (SECSuccess); - } - - /* Look in the crl entry extensions. If there is a critical extension, - then the crl version must be v2; otherwise, it should be v1. - */ - entries = crl->entries; - while (*entries) { - entry = *entries; - if (entry->extensions) { - /* If there is a critical extension in the entries, then the - CRL must be of version 2. If we already saw a critical extension, - there is no need to check the version again. - */ - if (hasCriticalExten == PR_FALSE) { - hasCriticalExten = cert_HasCriticalExtension (entry->extensions); - if (hasCriticalExten) { - if (cert_get_crl_version(crl) != SEC_CRL_VERSION_2) { - /* only CRL v2 critical extensions are supported */ - PORT_SetError(SEC_ERROR_CRL_V1_CRITICAL_EXTENSION); - rv = SECFailure; - break; - } - } - } - - /* For each entry, make sure that it does not contain an unknown - critical extension. If it does, we must reject the CRL since - we don't know how to process the extension. - */ - if (cert_HasUnknownCriticalExten (entry->extensions) == PR_TRUE) { - PORT_SetError (SEC_ERROR_CRL_UNKNOWN_CRITICAL_EXTENSION); - rv = SECFailure; - break; - } - } - ++entries; - } - return(rv); -} - -/* Check the version of the CRL. If there is a critical extension in the crl - or crl entry, then the version must be v2. Otherwise, it should be v1. If - the crl contains critical extension(s), then we must recognized the - extension's OID. - */ -SECStatus cert_check_crl_version (CERTCrl *crl) -{ - PRBool hasCriticalExten = PR_FALSE; - int version = cert_get_crl_version(crl); - - if (version > SEC_CRL_VERSION_2) { - PORT_SetError (SEC_ERROR_CRL_INVALID_VERSION); - return (SECFailure); - } - - /* Check the crl extensions for a critial extension. If one is found, - and the version is not v2, then we are done. - */ - if (crl->extensions) { - hasCriticalExten = cert_HasCriticalExtension (crl->extensions); - if (hasCriticalExten) { - if (version != SEC_CRL_VERSION_2) { - /* only CRL v2 critical extensions are supported */ - PORT_SetError(SEC_ERROR_CRL_V1_CRITICAL_EXTENSION); - return (SECFailure); - } - /* make sure that there is no unknown critical extension */ - if (cert_HasUnknownCriticalExten (crl->extensions) == PR_TRUE) { - PORT_SetError (SEC_ERROR_CRL_UNKNOWN_CRITICAL_EXTENSION); - return (SECFailure); - } - } - } - - return (SECSuccess); -} - -/* - * Generate a database key, based on the issuer name from a - * DER crl. - */ -SECStatus -CERT_KeyFromDERCrl(PRArenaPool *arena, SECItem *derCrl, SECItem *key) -{ - SECStatus rv; - CERTSignedData sd; - CERTCrlKey crlkey; - - PORT_Memset (&sd, 0, sizeof (sd)); - rv = SEC_ASN1DecodeItem (arena, &sd, CERT_SignedDataTemplate, derCrl); - if (rv != SECSuccess) { - return rv; - } - - PORT_Memset (&crlkey, 0, sizeof (crlkey)); - rv = SEC_ASN1DecodeItem(arena, &crlkey, cert_CrlKeyTemplate, &sd.data); - if (rv != SECSuccess) { - return rv; - } - - key->len = crlkey.derName.len; - key->data = crlkey.derName.data; - - return(SECSuccess); -} - -#define GetOpaqueCRLFields(x) ((OpaqueCRLFields*)x->opaque) - -SECStatus CERT_CompleteCRLDecodeEntries(CERTSignedCrl* crl) -{ - SECStatus rv = SECSuccess; - SECItem* crldata = NULL; - OpaqueCRLFields* extended = NULL; - - if ( (!crl) || - (!(extended = (OpaqueCRLFields*) crl->opaque)) || - (PR_TRUE == extended->decodingError) ) { - rv = SECFailure; - } else { - if (PR_FALSE == extended->partial) { - /* the CRL has already been fully decoded */ - return SECSuccess; - } - if (PR_TRUE == extended->badEntries) { - /* the entries decoding already failed */ - return SECFailure; - } - crldata = &crl->signatureWrap.data; - if (!crldata) { - rv = SECFailure; - } - } - - if (SECSuccess == rv) { - rv = SEC_QuickDERDecodeItem(crl->arena, - &crl->crl, - CERT_CrlTemplateEntriesOnly, - crldata); - if (SECSuccess == rv) { - extended->partial = PR_FALSE; /* successful decode, avoid - decoding again */ - } else { - extended->decodingError = PR_TRUE; - extended->badEntries = PR_TRUE; - /* cache the decoding failure. If it fails the first time, - it will fail again, which will grow the arena and leak - memory, so we want to avoid it */ - } - rv = cert_check_crl_entries(&crl->crl); - if (rv != SECSuccess) { - extended->badExtensions = PR_TRUE; - } - } - return rv; -} - -/* - * take a DER CRL or KRL and decode it into a CRL structure - * allow reusing the input DER without making a copy - */ -CERTSignedCrl * -CERT_DecodeDERCrlWithFlags(PRArenaPool *narena, SECItem *derSignedCrl, - int type, PRInt32 options) -{ - PRArenaPool *arena; - CERTSignedCrl *crl; - SECStatus rv; - OpaqueCRLFields* extended = NULL; - const SEC_ASN1Template* crlTemplate = CERT_SignedCrlTemplate; - - if (!derSignedCrl || - ( (options & CRL_DECODE_ADOPT_HEAP_DER) && /* adopting DER requires - not copying it */ - (!(options & CRL_DECODE_DONT_COPY_DER)) - ) - ) { - PORT_SetError(SEC_ERROR_INVALID_ARGS); - return NULL; - } - - /* make a new arena if needed */ - if (narena == NULL) { - arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE); - if ( !arena ) { - return NULL; - } - } else { - arena = narena; - } - - /* allocate the CRL structure */ - crl = (CERTSignedCrl *)PORT_ArenaZAlloc(arena, sizeof(CERTSignedCrl)); - if ( !crl ) { - PORT_SetError(SEC_ERROR_NO_MEMORY); - goto loser; - } - - crl->arena = arena; - - /* allocate opaque fields */ - crl->opaque = (void*)PORT_ArenaZAlloc(arena, sizeof(OpaqueCRLFields)); - if ( !crl->opaque ) { - goto loser; - } - extended = (OpaqueCRLFields*) crl->opaque; - if (options & CRL_DECODE_ADOPT_HEAP_DER) { - extended->heapDER = PR_TRUE; - } - if (options & CRL_DECODE_DONT_COPY_DER) { - crl->derCrl = derSignedCrl; /* DER is not copied . The application - must keep derSignedCrl until it - destroys the CRL */ - } else { - crl->derCrl = (SECItem *)PORT_ArenaZAlloc(arena,sizeof(SECItem)); - if (crl->derCrl == NULL) { - goto loser; - } - rv = SECITEM_CopyItem(arena, crl->derCrl, derSignedCrl); - if (rv != SECSuccess) { - goto loser; - } - } - - /* Save the arena in the inner crl for CRL extensions support */ - crl->crl.arena = arena; - if (options & CRL_DECODE_SKIP_ENTRIES) { - crlTemplate = cert_SignedCrlTemplateNoEntries; - extended->partial = PR_TRUE; - } - - /* decode the CRL info */ - switch (type) { - case SEC_CRL_TYPE: - rv = SEC_QuickDERDecodeItem(arena, crl, crlTemplate, crl->derCrl); - if (rv != SECSuccess) { - extended->badDER = PR_TRUE; - break; - } - /* check for critical extensions */ - rv = cert_check_crl_version (&crl->crl); - if (rv != SECSuccess) { - extended->badExtensions = PR_TRUE; - break; - } - - if (PR_TRUE == extended->partial) { - /* partial decoding, don't verify entries */ - break; - } - - rv = cert_check_crl_entries(&crl->crl); - if (rv != SECSuccess) { - extended->badExtensions = PR_TRUE; - } - - break; - - case SEC_KRL_TYPE: - rv = SEC_QuickDERDecodeItem - (arena, crl, cert_SignedKrlTemplate, derSignedCrl); - break; - default: - rv = SECFailure; - break; - } - - if (rv != SECSuccess) { - goto loser; - } - - crl->referenceCount = 1; - - return(crl); - -loser: - if (options & CRL_DECODE_KEEP_BAD_CRL) { - extended->decodingError = PR_TRUE; - crl->referenceCount = 1; - return(crl); - } - - if ((narena == NULL) && arena ) { - PORT_FreeArena(arena, PR_FALSE); - } - - return(0); -} - -/* - * take a DER CRL or KRL and decode it into a CRL structure - */ -CERTSignedCrl * -CERT_DecodeDERCrl(PRArenaPool *narena, SECItem *derSignedCrl, int type) -{ - return CERT_DecodeDERCrlWithFlags(narena, derSignedCrl, type, - CRL_DECODE_DEFAULT_OPTIONS); -} - -/* - * Lookup a CRL in the databases. We mirror the same fast caching data base - * caching stuff used by certificates....? - * return values : - * - * SECSuccess means we got a valid DER CRL (passed in "decoded"), or no CRL at - * all - * - * SECFailure means we got a fatal error - most likely, we found a CRL, - * and it failed decoding, or there was an out of memory error. Do NOT ignore - * it and specifically do NOT treat it the same as having no CRL, as this - * can compromise security !!! Ideally, you should treat this case as if you - * received a "catch-all" CRL where all certs you were looking up are - * considered to be revoked - */ -static SECStatus -SEC_FindCrlByKeyOnSlot(PK11SlotInfo *slot, SECItem *crlKey, int type, - CERTSignedCrl** decoded, PRInt32 decodeoptions) -{ - SECStatus rv = SECSuccess; - CERTSignedCrl *crl = NULL; - SECItem *derCrl = NULL; - CK_OBJECT_HANDLE crlHandle = 0; - char *url = NULL; - int nsserror; - - PORT_Assert(decoded); - if (!decoded) { - PORT_SetError(SEC_ERROR_INVALID_ARGS); - return SECFailure; - } - - /* XXX it would be really useful to be able to fetch the CRL directly into - an arena. This would avoid a copy later on in the decode step */ - PORT_SetError(0); - derCrl = PK11_FindCrlByName(&slot, &crlHandle, crlKey, type, &url); - if (derCrl == NULL) { - /* if we had a problem other than the CRL just didn't exist, return - * a failure to the upper level */ - nsserror = PORT_GetError(); - if ((nsserror != 0) && (nsserror != SEC_ERROR_CRL_NOT_FOUND)) { - rv = SECFailure; - } - goto loser; - } - PORT_Assert(crlHandle != CK_INVALID_HANDLE); - /* PK11_FindCrlByName obtained a slot reference. */ - - if (!(decodeoptions & CRL_DECODE_DONT_COPY_DER) ) { - /* force adoption of the DER from the heap - this will cause it to be - automatically freed when SEC_DestroyCrl is invoked */ - decodeoptions |= CRL_DECODE_ADOPT_HEAP_DER; - } - crl = CERT_DecodeDERCrlWithFlags(NULL, derCrl, type, decodeoptions); - if (crl) { - crl->slot = slot; - slot = NULL; /* adopt it */ - crl->pkcs11ID = crlHandle; - if (url) { - crl->url = PORT_ArenaStrdup(crl->arena,url); - } - } else { - rv = SECFailure; - } - - if (url) { - PORT_Free(url); - } - - if (slot) { - PK11_FreeSlot(slot); - } - -loser: - if (derCrl) { - /* destroy the DER if it was copied to the CRL */ - if (crl && (!(decodeoptions & CRL_DECODE_DONT_COPY_DER)) ) { - SECITEM_FreeItem(derCrl, PR_TRUE); - } - } - - *decoded = crl; - - return rv; -} - -SECStatus SEC_DestroyCrl(CERTSignedCrl *crl); - -CERTSignedCrl * -crl_storeCRL (PK11SlotInfo *slot,char *url, - CERTSignedCrl *newCrl, SECItem *derCrl, int type) -{ - CERTSignedCrl *oldCrl = NULL, *crl = NULL; - PRBool deleteOldCrl = PR_FALSE; - CK_OBJECT_HANDLE crlHandle = CK_INVALID_HANDLE; - - PORT_Assert(newCrl); - PORT_Assert(derCrl); - - /* we can't use the cache here because we must look in the same - token */ - SEC_FindCrlByKeyOnSlot(slot, &newCrl->crl.derName, type, - &oldCrl, CRL_DECODE_SKIP_ENTRIES); - - /* if there is an old crl on the token, make sure the one we are - installing is newer. If not, exit out, otherwise delete the - old crl. - */ - if (oldCrl != NULL) { - /* if it's already there, quietly continue */ - if (SECITEM_CompareItem(newCrl->derCrl, oldCrl->derCrl) - == SECEqual) { - crl = newCrl; - crl->slot = PK11_ReferenceSlot(slot); - crl->pkcs11ID = oldCrl->pkcs11ID; - goto done; - } - if (!SEC_CrlIsNewer(&newCrl->crl,&oldCrl->crl)) { - - if (type == SEC_CRL_TYPE) { - PORT_SetError(SEC_ERROR_OLD_CRL); - } else { - PORT_SetError(SEC_ERROR_OLD_KRL); - } - - goto done; - } - - if ((SECITEM_CompareItem(&newCrl->crl.derName, - &oldCrl->crl.derName) != SECEqual) && - (type == SEC_KRL_TYPE) ) { - - PORT_SetError(SEC_ERROR_CKL_CONFLICT); - goto done; - } - - /* if we have a url in the database, use that one */ - if (oldCrl->url) { - url = oldCrl->url; - } - - /* really destroy this crl */ - /* first drum it out of the permanment Data base */ - deleteOldCrl = PR_TRUE; - } - - /* invalidate CRL cache for this issuer */ - CERT_CRLCacheRefreshIssuer(NULL, &newCrl->crl.derName); - /* Write the new entry into the data base */ - crlHandle = PK11_PutCrl(slot, derCrl, &newCrl->crl.derName, url, type); - if (crlHandle != CK_INVALID_HANDLE) { - crl = newCrl; - crl->slot = PK11_ReferenceSlot(slot); - crl->pkcs11ID = crlHandle; - if (url) { - crl->url = PORT_ArenaStrdup(crl->arena,url); - } - } - -done: - if (oldCrl) { - if (deleteOldCrl && crlHandle != CK_INVALID_HANDLE) { - SEC_DeletePermCRL(oldCrl); - } - SEC_DestroyCrl(oldCrl); - } - - return crl; -} - -/* - * - * create a new CRL from DER material. - * - * The signature on this CRL must be checked before you - * load it. ??? - */ -CERTSignedCrl * -SEC_NewCrl(CERTCertDBHandle *handle, char *url, SECItem *derCrl, int type) -{ - CERTSignedCrl* retCrl = NULL; - PK11SlotInfo* slot = PK11_GetInternalKeySlot(); - retCrl = PK11_ImportCRL(slot, derCrl, url, type, NULL, - CRL_IMPORT_BYPASS_CHECKS, NULL, CRL_DECODE_DEFAULT_OPTIONS); - PK11_FreeSlot(slot); - - return retCrl; -} - -CERTSignedCrl * -SEC_FindCrlByDERCert(CERTCertDBHandle *handle, SECItem *derCrl, int type) -{ - PRArenaPool *arena; - SECItem crlKey; - SECStatus rv; - CERTSignedCrl *crl = NULL; - - /* create a scratch arena */ - arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE); - if ( arena == NULL ) { - return(NULL); - } - - /* extract the database key from the cert */ - rv = CERT_KeyFromDERCrl(arena, derCrl, &crlKey); - if ( rv != SECSuccess ) { - goto loser; - } - - /* find the crl */ - crl = SEC_FindCrlByName(handle, &crlKey, type); - -loser: - PORT_FreeArena(arena, PR_FALSE); - return(crl); -} - -CERTSignedCrl* SEC_DupCrl(CERTSignedCrl* acrl) -{ - if (acrl) - { - PR_AtomicIncrement(&acrl->referenceCount); - return acrl; - } - return NULL; -} - -SECStatus -SEC_DestroyCrl(CERTSignedCrl *crl) -{ - if (crl) { - if (PR_AtomicDecrement(&crl->referenceCount) < 1) { - if (crl->slot) { - PK11_FreeSlot(crl->slot); - } - if (GetOpaqueCRLFields(crl) && - PR_TRUE == GetOpaqueCRLFields(crl)->heapDER) { - SECITEM_FreeItem(crl->derCrl, PR_TRUE); - } - if (crl->arena) { - PORT_FreeArena(crl->arena, PR_FALSE); - } - } - return SECSuccess; - } else { - return SECFailure; - } -} - -SECStatus -SEC_LookupCrls(CERTCertDBHandle *handle, CERTCrlHeadNode **nodes, int type) -{ - CERTCrlHeadNode *head; - PRArenaPool *arena = NULL; - SECStatus rv; - - *nodes = NULL; - - arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE); - if ( arena == NULL ) { - return SECFailure; - } - - /* build a head structure */ - head = (CERTCrlHeadNode *)PORT_ArenaAlloc(arena, sizeof(CERTCrlHeadNode)); - head->arena = arena; - head->first = NULL; - head->last = NULL; - head->dbhandle = handle; - - /* Look up the proper crl types */ - *nodes = head; - - rv = PK11_LookupCrls(head, type, NULL); - - if (rv != SECSuccess) { - if ( arena ) { - PORT_FreeArena(arena, PR_FALSE); - *nodes = NULL; - } - } - - return rv; -} - -/* These functions simply return the address of the above-declared templates. -** This is necessary for Windows DLLs. Sigh. -*/ -SEC_ASN1_CHOOSER_IMPLEMENT(CERT_IssuerAndSNTemplate) -SEC_ASN1_CHOOSER_IMPLEMENT(CERT_CrlTemplate) -SEC_ASN1_CHOOSER_IMPLEMENT(CERT_SignedCrlTemplate) -SEC_ASN1_CHOOSER_IMPLEMENT(CERT_SetOfSignedCrlTemplate) - -/* CRL cache code starts here */ - -/* constructor */ -static SECStatus CachedCrl_Create(CachedCrl** returned, CERTSignedCrl* crl, - CRLOrigin origin); -/* destructor */ -static SECStatus CachedCrl_Destroy(CachedCrl* crl); - -/* create hash table of CRL entries */ -static SECStatus CachedCrl_Populate(CachedCrl* crlobject); - -/* empty the cache content */ -static SECStatus CachedCrl_Depopulate(CachedCrl* crl); - -/* are these CRLs the same, as far as the cache is concerned ? - Or are they the same token object, but with different DER ? */ - -static SECStatus CachedCrl_Compare(CachedCrl* a, CachedCrl* b, PRBool* isDupe, - PRBool* isUpdated); - -/* create a DPCache object */ -static SECStatus DPCache_Create(CRLDPCache** returned, CERTCertificate* issuer, - SECItem* subject, SECItem* dp); - -/* destructor for CRL DPCache object */ -static SECStatus DPCache_Destroy(CRLDPCache* cache); - -/* add a new CRL object to the dynamic array of CRLs of the DPCache, and - returns the cached CRL object . Needs write access to DPCache. */ -static SECStatus DPCache_AddCRL(CRLDPCache* cache, CachedCrl* crl, PRBool* added); - -/* fetch the CRL for this DP from the PKCS#11 tokens */ -static SECStatus DPCache_FetchFromTokens(CRLDPCache* cache, PRTime vfdate, void* wincx); - -/* check if a particular SN is in the CRL cache and return its entry */ -static SECStatus DPCache_Lookup(CRLDPCache* cache, SECItem* sn, CERTCrlEntry** returned); - -/* update the content of the CRL cache, including fetching of CRLs, and - reprocessing with specified issuer and date */ -static SECStatus DPCache_GetUpToDate(CRLDPCache* cache, CERTCertificate* issuer, - PRBool readlocked, PRTime vfdate, void* wincx); - -/* returns true if there are CRLs from PKCS#11 slots */ -static PRBool DPCache_HasTokenCRLs(CRLDPCache* cache); - -/* remove CRL at offset specified */ -static SECStatus DPCache_RemoveCRL(CRLDPCache* cache, PRUint32 offset); - -/* Pick best CRL to use . needs write access */ -static SECStatus DPCache_SelectCRL(CRLDPCache* cache); - -/* create an issuer cache object (per CA subject ) */ -static SECStatus IssuerCache_Create(CRLIssuerCache** returned, - CERTCertificate* issuer, - SECItem* subject, SECItem* dp); - -/* destructor for CRL IssuerCache object */ -SECStatus IssuerCache_Destroy(CRLIssuerCache* cache); - -/* add a DPCache to the issuer cache */ -static SECStatus IssuerCache_AddDP(CRLIssuerCache* cache, CERTCertificate* issuer, - SECItem* subject, SECItem* dp, CRLDPCache** newdpc); - -/* get a particular DPCache object from an IssuerCache */ -static CRLDPCache* IssuerCache_GetDPCache(CRLIssuerCache* cache, SECItem* dp); - -/* -** Pre-allocator hash allocator ops. -*/ - -/* allocate memory for hash table */ -static void * PR_CALLBACK -PreAllocTable(void *pool, PRSize size) -{ - PreAllocator* alloc = (PreAllocator*)pool; - PORT_Assert(alloc); - if (!alloc) - { - /* no allocator, or buffer full */ - return NULL; - } - if (size > (alloc->len - alloc->used)) - { - /* initial buffer full, let's use the arena */ - alloc->extra += size; - return PORT_ArenaAlloc(alloc->arena, size); - } - /* use the initial buffer */ - alloc->used += size; - return (char*) alloc->data + alloc->used - size; -} - -/* free hash table memory. - Individual PreAllocator elements cannot be freed, so this is a no-op. */ -static void PR_CALLBACK -PreFreeTable(void *pool, void *item) -{ -} - -/* allocate memory for hash table */ -static PLHashEntry * PR_CALLBACK -PreAllocEntry(void *pool, const void *key) -{ - return PreAllocTable(pool, sizeof(PLHashEntry)); -} - -/* free hash table entry. - Individual PreAllocator elements cannot be freed, so this is a no-op. */ -static void PR_CALLBACK -PreFreeEntry(void *pool, PLHashEntry *he, PRUintn flag) -{ -} - -/* methods required for PL hash table functions */ -static PLHashAllocOps preAllocOps = -{ - PreAllocTable, PreFreeTable, - PreAllocEntry, PreFreeEntry -}; - -/* destructor for PreAllocator object */ -void PreAllocator_Destroy(PreAllocator* PreAllocator) -{ - if (!PreAllocator) - { - return; - } - if (PreAllocator->arena) - { - PORT_FreeArena(PreAllocator->arena, PR_TRUE); - } - if (PreAllocator->data) - { - PORT_Free(PreAllocator->data); - } - PORT_Free(PreAllocator); -} - -/* constructor for PreAllocator object */ -PreAllocator* PreAllocator_Create(PRSize size) -{ - PreAllocator prebuffer; - PreAllocator* prepointer = NULL; - memset(&prebuffer, 0, sizeof(PreAllocator)); - prebuffer.len = size; - prebuffer.arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE); - PORT_Assert(prebuffer.arena); - if (!prebuffer.arena) - { - PreAllocator_Destroy(&prebuffer); - return NULL; - } - if (prebuffer.len) - { - prebuffer.data = PORT_Alloc(prebuffer.len); - if (!prebuffer.data) - { - PreAllocator_Destroy(&prebuffer); - return NULL; - } - } - else - { - prebuffer.data = NULL; - } - prepointer = (PreAllocator*)PORT_Alloc(sizeof(PreAllocator)); - if (!prepointer) - { - PreAllocator_Destroy(&prebuffer); - return NULL; - } - *prepointer = prebuffer; - return prepointer; -} - -/* global CRL cache object */ -static CRLCache crlcache = { NULL, NULL }; - -/* initial state is off */ -static PRBool crlcache_initialized = PR_FALSE; - -PRTime CRLCache_Empty_TokenFetch_Interval = 60 * 1000000; /* how often - to query the tokens for CRL objects, in order to discover new objects, if - the cache does not contain any token CRLs . In microseconds */ - -PRTime CRLCache_TokenRefetch_Interval = 600 * 1000000 ; /* how often - to query the tokens for CRL objects, in order to discover new objects, if - the cache already contains token CRLs In microseconds */ - -PRTime CRLCache_ExistenceCheck_Interval = 60 * 1000000; /* how often to check - if a token CRL object still exists. In microseconds */ - -/* this function is called at NSS initialization time */ -SECStatus InitCRLCache(void) -{ - if (PR_FALSE == crlcache_initialized) - { - PORT_Assert(NULL == crlcache.lock); - PORT_Assert(NULL == crlcache.issuers); - if (crlcache.lock || crlcache.issuers) - { - /* CRL cache already partially initialized */ - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; - } -#ifdef GLOBAL_RWLOCK - crlcache.lock = NSSRWLock_New(NSS_RWLOCK_RANK_NONE, NULL); -#else - crlcache.lock = PR_NewLock(); -#endif - if (!crlcache.lock) - { - return SECFailure; - } - crlcache.issuers = PL_NewHashTable(0, SECITEM_Hash, SECITEM_HashCompare, - PL_CompareValues, NULL, NULL); - if (!crlcache.issuers) - { -#ifdef GLOBAL_RWLOCK - NSSRWLock_Destroy(crlcache.lock); -#else - PR_DestroyLock(crlcache.lock); -#endif - crlcache.lock = NULL; - return SECFailure; - } - crlcache_initialized = PR_TRUE; - return SECSuccess; - } - else - { - PORT_Assert(crlcache.lock); - PORT_Assert(crlcache.issuers); - if ( (NULL == crlcache.lock) || (NULL == crlcache.issuers) ) - { - /* CRL cache not fully initialized */ - return SECFailure; - } - else - { - /* CRL cache already initialized */ - return SECSuccess; - } - } -} - -/* destructor for CRL DPCache object */ -static SECStatus DPCache_Destroy(CRLDPCache* cache) -{ - PRUint32 i = 0; - PORT_Assert(cache); - if (!cache) - { - PORT_Assert(0); - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; - } - if (cache->lock) - { -#ifdef DPC_RWLOCK - NSSRWLock_Destroy(cache->lock); -#else - PR_DestroyLock(cache->lock); -#endif - } - else - { - PORT_Assert(0); - return SECFailure; - } - /* destroy all our CRL objects */ - for (i=0;i<cache->ncrls;i++) - { - if (!cache->crls || !cache->crls[i] || - SECSuccess != CachedCrl_Destroy(cache->crls[i])) - { - return SECFailure; - } - } - /* free the array of CRLs */ - if (cache->crls) - { - PORT_Free(cache->crls); - } - /* destroy the cert */ - if (cache->issuer) - { - CERT_DestroyCertificate(cache->issuer); - } - /* free the subject */ - if (cache->subject) - { - SECITEM_FreeItem(cache->subject, PR_TRUE); - } - /* free the distribution points */ - if (cache->distributionPoint) - { - SECITEM_FreeItem(cache->distributionPoint, PR_TRUE); - } - PORT_Free(cache); - return SECSuccess; -} - -/* destructor for CRL IssuerCache object */ -SECStatus IssuerCache_Destroy(CRLIssuerCache* cache) -{ - PORT_Assert(cache); - if (!cache) - { - PORT_Assert(0); - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; - } -#ifdef XCRL - if (cache->lock) - { - NSSRWLock_Destroy(cache->lock); - } - else - { - PORT_Assert(0); - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; - } - if (cache->issuer) - { - CERT_DestroyCertificate(cache->issuer); - } -#endif - /* free the subject */ - if (cache->subject) - { - SECITEM_FreeItem(cache->subject, PR_TRUE); - } - if (SECSuccess != DPCache_Destroy(cache->dpp)) - { - PORT_Assert(0); - return SECFailure; - } - PORT_Free(cache); - return SECSuccess; -} - -/* callback function used in hash table destructor */ -static PRIntn PR_CALLBACK FreeIssuer(PLHashEntry *he, PRIntn i, void *arg) -{ - CRLIssuerCache* issuer = NULL; - SECStatus* rv = (SECStatus*) arg; - - PORT_Assert(he); - if (!he) - { - return HT_ENUMERATE_NEXT; - } - issuer = (CRLIssuerCache*) he->value; - PORT_Assert(issuer); - if (issuer) - { - if (SECSuccess != IssuerCache_Destroy(issuer)) - { - PORT_Assert(rv); - if (rv) - { - *rv = SECFailure; - } - return HT_ENUMERATE_NEXT; - } - } - return HT_ENUMERATE_NEXT; -} - -/* needs to be called at NSS shutdown time - This will destroy the global CRL cache, including - - the hash table of issuer cache objects - - the issuer cache objects - - DPCache objects in issuer cache objects */ -SECStatus ShutdownCRLCache(void) -{ - SECStatus rv = SECSuccess; - if (PR_FALSE == crlcache_initialized && - !crlcache.lock && !crlcache.issuers) - { - /* CRL cache has already been shut down */ - return SECSuccess; - } - if (PR_TRUE == crlcache_initialized && - (!crlcache.lock || !crlcache.issuers)) - { - /* CRL cache has partially been shut down */ - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; - } - /* empty the cache */ - /* free the issuers */ - PL_HashTableEnumerateEntries(crlcache.issuers, &FreeIssuer, &rv); - /* free the hash table of issuers */ - PL_HashTableDestroy(crlcache.issuers); - crlcache.issuers = NULL; - /* free the global lock */ -#ifdef GLOBAL_RWLOCK - NSSRWLock_Destroy(crlcache.lock); -#else - PR_DestroyLock(crlcache.lock); -#endif - crlcache.lock = NULL; - crlcache_initialized = PR_FALSE; - return rv; -} - -/* add a new CRL object to the dynamic array of CRLs of the DPCache, and - returns the cached CRL object . Needs write access to DPCache. */ -static SECStatus DPCache_AddCRL(CRLDPCache* cache, CachedCrl* newcrl, - PRBool* added) -{ - CachedCrl** newcrls = NULL; - PRUint32 i = 0; - PORT_Assert(cache); - PORT_Assert(newcrl); - PORT_Assert(added); - if (!cache || !newcrl || !added) - { - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; - } - - *added = PR_FALSE; - /* before adding a new CRL, check if it is a duplicate */ - for (i=0;i<cache->ncrls;i++) - { - CachedCrl* existing = NULL; - SECStatus rv = SECSuccess; - PRBool dupe = PR_FALSE, updated = PR_FALSE; - if (!cache->crls) - { - PORT_Assert(0); - return SECFailure; - } - existing = cache->crls[i]; - if (!existing) - { - PORT_Assert(0); - return SECFailure; - } - rv = CachedCrl_Compare(existing, newcrl, &dupe, &updated); - if (SECSuccess != rv) - { - PORT_Assert(0); - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; - } - if (PR_TRUE == dupe) - { - /* dupe */ - PORT_SetError(SEC_ERROR_CRL_ALREADY_EXISTS); - return SECSuccess; - } - if (PR_TRUE == updated) - { - /* this token CRL is in the same slot and has the same object ID, - but different content. We need to remove the old object */ - if (SECSuccess != DPCache_RemoveCRL(cache, i)) - { - PORT_Assert(0); - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return PR_FALSE; - } - } - } - - newcrls = (CachedCrl**)PORT_Realloc(cache->crls, - (cache->ncrls+1)*sizeof(CachedCrl*)); - if (!newcrls) - { - return SECFailure; - } - cache->crls = newcrls; - cache->ncrls++; - cache->crls[cache->ncrls-1] = newcrl; - *added = PR_TRUE; - return SECSuccess; -} - -/* remove CRL at offset specified */ -static SECStatus DPCache_RemoveCRL(CRLDPCache* cache, PRUint32 offset) -{ - CachedCrl* acrl = NULL; - PORT_Assert(cache); - if (!cache || (!cache->crls) || (!(offset<cache->ncrls)) ) - { - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; - } - acrl = cache->crls[offset]; - PORT_Assert(acrl); - if (!acrl) - { - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; - } - cache->crls[offset] = cache->crls[cache->ncrls-1]; - cache->crls[cache->ncrls-1] = NULL; - cache->ncrls--; - if (cache->selected == acrl) { - cache->selected = NULL; - } - if (SECSuccess != CachedCrl_Destroy(acrl)) - { - PORT_Assert(0); - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; - } - return SECSuccess; -} - -/* check whether a CRL object stored in a PKCS#11 token still exists in - that token . This has to be efficient (the entire CRL value cannot be - transferred accross the token boundaries), so this is accomplished by - simply fetching the subject attribute and making sure it hasn't changed . - Note that technically, the CRL object could have been replaced with a new - PKCS#11 object of the same ID and subject (which actually happens in - softoken), but this function has no way of knowing that the object - value changed, since CKA_VALUE isn't checked. */ -static PRBool TokenCRLStillExists(CERTSignedCrl* crl) -{ - NSSItem newsubject; - SECItem subject; - CK_ULONG crl_class; - PRStatus status; - PK11SlotInfo* slot = NULL; - nssCryptokiObject instance; - NSSArena* arena; - PRBool xstatus = PR_TRUE; - SECItem* oldSubject = NULL; - - PORT_Assert(crl); - if (!crl) - { - return PR_FALSE; - } - slot = crl->slot; - PORT_Assert(crl->slot); - if (!slot) - { - return PR_FALSE; - } - oldSubject = &crl->crl.derName; - PORT_Assert(oldSubject); - if (!oldSubject) - { - return PR_FALSE; - } - - /* query subject and type attributes in order to determine if the - object has been deleted */ - - /* first, make an nssCryptokiObject */ - instance.handle = crl->pkcs11ID; - PORT_Assert(instance.handle); - if (!instance.handle) - { - return PR_FALSE; - } - instance.token = PK11Slot_GetNSSToken(slot); - PORT_Assert(instance.token); - if (!instance.token) - { - return PR_FALSE; - } - instance.isTokenObject = PR_TRUE; - instance.label = NULL; - - arena = NSSArena_Create(); - PORT_Assert(arena); - if (!arena) - { - return PR_FALSE; - } - - status = nssCryptokiCRL_GetAttributes(&instance, - NULL, /* XXX sessionOpt */ - arena, - NULL, - &newsubject, /* subject */ - &crl_class, /* class */ - NULL, - NULL); - if (PR_SUCCESS == status) - { - subject.data = newsubject.data; - subject.len = newsubject.size; - if (SECITEM_CompareItem(oldSubject, &subject) != SECEqual) - { - xstatus = PR_FALSE; - } - if (CKO_NETSCAPE_CRL != crl_class) - { - xstatus = PR_FALSE; - } - } - else - { - xstatus = PR_FALSE; - } - NSSArena_Destroy(arena); - return xstatus; -} - -/* verify the signature of a CRL against its issuer at a given date */ -static SECStatus CERT_VerifyCRL( - CERTSignedCrl* crlobject, - CERTCertificate* issuer, - PRTime vfdate, - void* wincx) -{ - return CERT_VerifySignedData(&crlobject->signatureWrap, - issuer, vfdate, wincx); -} - -/* verify a CRL and update cache state */ -static SECStatus CachedCrl_Verify(CRLDPCache* cache, CachedCrl* crlobject, - PRTime vfdate, void* wincx) -{ - /* Check if it is an invalid CRL - if we got a bad CRL, we want to cache it in order to avoid - subsequent fetches of this same identical bad CRL. We set - the cache to the invalid state to ensure that all certs - on this DP are considered revoked from now on. The cache - object will remain in this state until the bad CRL object - is removed from the token it was fetched from. If the cause - of the failure is that we didn't have the issuer cert to - verify the signature, this state can be cleared when - the issuer certificate becomes available if that causes the - signature to verify */ - - if (!cache || !crlobject) - { - PORT_Assert(0); - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; - } - if (PR_TRUE == GetOpaqueCRLFields(crlobject->crl)->decodingError) - { - crlobject->sigChecked = PR_TRUE; /* we can never verify a CRL - with bogus DER. Mark it checked so we won't try again */ - PORT_SetError(SEC_ERROR_BAD_DER); - return SECSuccess; - } - else - { - SECStatus signstatus = SECFailure; - if (cache->issuer) - { - signstatus = CERT_VerifyCRL(crlobject->crl, cache->issuer, vfdate, - wincx); - } - if (SECSuccess != signstatus) - { - if (!cache->issuer) - { - /* we tried to verify without an issuer cert . This is - because this CRL came through a call to SEC_FindCrlByName. - So, we don't cache this verification failure. We'll try - to verify the CRL again when a certificate from that issuer - becomes available */ - } else - { - crlobject->sigChecked = PR_TRUE; - } - PORT_SetError(SEC_ERROR_CRL_BAD_SIGNATURE); - return SECSuccess; - } else - { - crlobject->sigChecked = PR_TRUE; - crlobject->sigValid = PR_TRUE; - } - } - - return SECSuccess; -} - -/* fetch the CRLs for this DP from the PKCS#11 tokens */ -static SECStatus DPCache_FetchFromTokens(CRLDPCache* cache, PRTime vfdate, - void* wincx) -{ - SECStatus rv = SECSuccess; - CERTCrlHeadNode head; - if (!cache) - { - PORT_Assert(0); - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; - } - /* first, initialize list */ - memset(&head, 0, sizeof(head)); - head.arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE); - rv = pk11_RetrieveCrls(&head, cache->subject, wincx); - - /* if this function fails, something very wrong happened, such as an out - of memory error during CRL decoding. We don't want to proceed and must - mark the cache object invalid */ - if (SECFailure == rv) - { - /* fetch failed, add error bit */ - cache->invalid |= CRL_CACHE_LAST_FETCH_FAILED; - } else - { - /* fetch was successful, clear this error bit */ - cache->invalid &= (~CRL_CACHE_LAST_FETCH_FAILED); - } - - /* add any CRLs found to our array */ - if (SECSuccess == rv) - { - CERTCrlNode* crlNode = NULL; - - for (crlNode = head.first; crlNode ; crlNode = crlNode->next) - { - CachedCrl* returned = NULL; - CERTSignedCrl* crlobject = crlNode->crl; - if (!crlobject) - { - PORT_Assert(0); - continue; - } - rv = CachedCrl_Create(&returned, crlobject, CRL_OriginToken); - if (SECSuccess == rv) - { - PRBool added = PR_FALSE; - rv = DPCache_AddCRL(cache, returned, &added); - if (PR_TRUE != added) - { - rv = CachedCrl_Destroy(returned); - returned = NULL; - } - else - { - rv = CachedCrl_Verify(cache, returned, vfdate, wincx); - } - } - else - { - /* not enough memory to add the CRL to the cache. mark it - invalid so we will try again . */ - cache->invalid |= CRL_CACHE_LAST_FETCH_FAILED; - } - if (SECFailure == rv) - { - break; - } - } - } - - if (head.arena) - { - CERTCrlNode* crlNode = NULL; - /* clean up the CRL list in case we got a partial one - during a failed fetch */ - for (crlNode = head.first; crlNode ; crlNode = crlNode->next) - { - if (crlNode->crl) - { - SEC_DestroyCrl(crlNode->crl); /* free the CRL. Either it got - added to the cache and the refcount got bumped, or not, and - thus we need to free its RAM */ - } - } - PORT_FreeArena(head.arena, PR_FALSE); /* destroy CRL list */ - } - - return rv; -} - -/* check if a particular SN is in the CRL cache and return its entry */ -static SECStatus DPCache_Lookup(CRLDPCache* cache, SECItem* sn, - CERTCrlEntry** returned) -{ - CERTCrlEntry* acrlEntry = NULL; - if (!cache || !sn || !returned) - { - PORT_SetError(SEC_ERROR_INVALID_ARGS); - /* no cache or SN to look up, or no way to return entry */ - return SECFailure; - } - if (0 != cache->invalid) - { - /* the cache contains a bad CRL, or there was a CRL fetching error. - consider all certs revoked as a security measure */ - PORT_SetError(SEC_ERROR_CRL_INVALID); - return SECFailure; - } - if (!cache->selected) - { - /* no CRL means no entry to return, but this is OK */ - *returned = NULL; - return SECSuccess; - } - PORT_Assert(cache->selected->entries); - if (!cache->selected->entries) - { - return SECFailure; - } - /* XXX should probably use CachedCrl accessor function here */ - acrlEntry = PL_HashTableLookup(cache->selected->entries, (void*)sn); - if (acrlEntry) - { - *returned = acrlEntry; - } - return SECSuccess; -} - -#if defined(DPC_RWLOCK) - -#define DPCache_LockWrite() \ -{ \ - if (readlocked) \ - { \ - NSSRWLock_UnlockRead(cache->lock); \ - } \ - NSSRWLock_LockWrite(cache->lock); \ -} - -#define DPCache_UnlockWrite() \ -{ \ - if (readlocked) \ - { \ - NSSRWLock_LockRead(cache->lock); \ - } \ - NSSRWLock_UnlockWrite(cache->lock); \ -} - -#else - -/* with a global lock, we are always locked for read before we need write - access, so do nothing */ - -#define DPCache_LockWrite() \ -{ \ -} - -#define DPCache_UnlockWrite() \ -{ \ -} - -#endif - -/* update the content of the CRL cache, including fetching of CRLs, and - reprocessing with specified issuer and date . We are always holding - either the read or write lock on DPCache upon entry. */ -static SECStatus DPCache_GetUpToDate(CRLDPCache* cache, CERTCertificate* - issuer, PRBool readlocked, PRTime vfdate, - void* wincx) -{ - /* Update the CRLDPCache now. We don't cache token CRL lookup misses - yet, as we have no way of getting notified of new PKCS#11 object - creation that happens in a token */ - SECStatus rv = SECSuccess; - PRUint32 i = 0; - PRBool forcedrefresh = PR_FALSE; - PRBool dirty = PR_FALSE; /* whether something was changed in the - cache state during this update cycle */ - PRBool hastokenCRLs = PR_FALSE; - PRTime now = 0; - PRTime lastfetch = 0; - - if (!cache) - { - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; - } - - /* first, make sure we have obtained all the CRLs we need. - We do an expensive token fetch in the following cases : - 1) cache is empty because no fetch was ever performed yet - 2) cache is explicitly set to refresh state - 3) cache is in invalid state because last fetch failed - 4) cache contains no token CRLs, and it's been more than one minute - since the last fetch - 5) cache contains token CRLs, and it's been more than 10 minutes since - the last fetch - */ - forcedrefresh = cache->refresh; - lastfetch = cache->lastfetch; - if (PR_TRUE != forcedrefresh && - (!(cache->invalid & CRL_CACHE_LAST_FETCH_FAILED))) - { - now = PR_Now(); - hastokenCRLs = DPCache_HasTokenCRLs(cache); - } - if ( (0 == lastfetch) || - - (PR_TRUE == forcedrefresh) || - - (cache->invalid & CRL_CACHE_LAST_FETCH_FAILED) || - - ( (PR_FALSE == hastokenCRLs) && - ( (now - cache->lastfetch > CRLCache_Empty_TokenFetch_Interval) || - (now < cache->lastfetch)) ) || - - ( (PR_TRUE == hastokenCRLs) && - ((now - cache->lastfetch > CRLCache_TokenRefetch_Interval) || - (now < cache->lastfetch)) ) ) - { - /* the cache needs to be refreshed, and/or we had zero CRL for this - DP. Try to get one from PKCS#11 tokens */ - DPCache_LockWrite(); - /* check if another thread updated before us, and skip update if so */ - if (lastfetch == cache->lastfetch) - { - /* we are the first */ - rv = DPCache_FetchFromTokens(cache, vfdate, wincx); - if (PR_TRUE == cache->refresh) - { - cache->refresh = PR_FALSE; /* clear refresh state */ - } - dirty = PR_TRUE; - cache->lastfetch = PR_Now(); - } - DPCache_UnlockWrite(); - } - - /* now, make sure we have no extraneous CRLs (deleted token objects) - we'll do this inexpensive existence check either - 1) if there was a token object fetch - 2) every minute */ - if (( PR_TRUE != dirty) && (!now) ) - { - now = PR_Now(); - } - if ( (PR_TRUE == dirty) || - ( (now - cache->lastcheck > CRLCache_ExistenceCheck_Interval) || - (now < cache->lastcheck)) ) - { - PRBool mustunlock = PR_FALSE; - PRTime lastcheck = cache->lastcheck; - /* check if all CRLs still exist */ - for (i = 0; (i < cache->ncrls) ; i++) - { - CachedCrl* savcrl = cache->crls[i]; - if ( (!savcrl) || (savcrl && CRL_OriginToken != savcrl->origin)) - { - /* we only want to check token CRLs */ - continue; - } - if ((PR_TRUE != TokenCRLStillExists(savcrl->crl))) - { - - /* this CRL is gone */ - if (PR_TRUE != mustunlock) - { - DPCache_LockWrite(); - mustunlock = PR_TRUE; - } - /* first, we need to check if another thread did an update - before we did */ - if (lastcheck == cache->lastcheck) - { - /* the CRL is gone. And we are the one to do the update */ - DPCache_RemoveCRL(cache, i); - dirty = PR_TRUE; - } - /* stay locked here intentionally so we do all the other - updates in this thread for the remaining CRLs */ - } - } - if (PR_TRUE == mustunlock) - { - cache->lastcheck = PR_Now(); - DPCache_UnlockWrite(); - mustunlock = PR_FALSE; - } - } - - /* add issuer certificate if it was previously unavailable */ - if (issuer && (NULL == cache->issuer) && - (SECSuccess == CERT_CheckCertUsage(issuer, KU_CRL_SIGN))) - { - /* if we didn't have a valid issuer cert yet, but we do now. add it */ - DPCache_LockWrite(); - if (!cache->issuer) - { - dirty = PR_TRUE; - cache->issuer = CERT_DupCertificate(issuer); - } - DPCache_UnlockWrite(); - } - - /* verify CRLs that couldn't be checked when inserted into the cache - because the issuer cert or a verification date was unavailable. - These are CRLs that were inserted into the cache through - SEC_FindCrlByName, or through manual insertion, rather than through a - certificate verification (CERT_CheckCRL) */ - - if (cache->issuer && vfdate ) - { - PRBool mustunlock = PR_FALSE; - /* re-process all unverified CRLs */ - for (i = 0; i < cache->ncrls ; i++) - { - CachedCrl* savcrl = cache->crls[i]; - if (!savcrl) - { - continue; - } - if (PR_TRUE != savcrl->sigChecked) - { - if (PR_TRUE != mustunlock) - { - DPCache_LockWrite(); - mustunlock = PR_TRUE; - } - /* first, we need to check if another thread updated - it before we did, and abort if it has been modified since - we acquired the lock. Make sure first that the CRL is still - in the array at the same position */ - if ( (i<cache->ncrls) && (savcrl == cache->crls[i]) && - (PR_TRUE != savcrl->sigChecked) ) - { - /* the CRL is still there, unverified. Do it */ - CachedCrl_Verify(cache, savcrl, vfdate, wincx); - dirty = PR_TRUE; - } - /* stay locked here intentionally so we do all the other - updates in this thread for the remaining CRLs */ - } - if (PR_TRUE == mustunlock) - { - DPCache_UnlockWrite(); - mustunlock = PR_FALSE; - } - } - } - - if (dirty || cache->mustchoose) - { - /* changes to the content of the CRL cache necessitate examining all - CRLs for selection of the most appropriate one to cache */ - DPCache_LockWrite(); - DPCache_SelectCRL(cache); - cache->mustchoose = PR_FALSE; - DPCache_UnlockWrite(); - } - - return rv; -} - -/* callback for qsort to sort by thisUpdate */ -static int SortCRLsByThisUpdate(const void* arg1, const void* arg2) -{ - PRTime timea, timeb; - SECStatus rv = SECSuccess; - CachedCrl* a, *b; - - a = *(CachedCrl**) arg1; - b = *(CachedCrl**) arg2; - - if (!a || !b) - { - PORT_Assert(0); - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - rv = SECFailure; - } - - if (SECSuccess == rv) - { - rv = DER_DecodeTimeChoice(&timea, &a->crl->crl.lastUpdate); - } - if (SECSuccess == rv) - { - rv = DER_DecodeTimeChoice(&timeb, &b->crl->crl.lastUpdate); - } - if (SECSuccess == rv) - { - if (timea > timeb) - { - return 1; /* a is better than b */ - } - if (timea < timeb ) - { - return -1; /* a is not as good as b */ - } - } - - /* if they are equal, or if all else fails, use pointer differences */ - PORT_Assert(a != b); /* they should never be equal */ - return a>b?1:-1; -} - -/* callback for qsort to sort a set of disparate CRLs, some of which are - invalid DER or failed signature check. - - Validated CRLs are differentiated by thisUpdate . - Validated CRLs are preferred over non-validated CRLs . - Proper DER CRLs are preferred over non-DER data . -*/ -static int SortImperfectCRLs(const void* arg1, const void* arg2) -{ - CachedCrl* a, *b; - - a = *(CachedCrl**) arg1; - b = *(CachedCrl**) arg2; - - if (!a || !b) - { - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - PORT_Assert(0); - } - else - { - PRBool aDecoded = PR_FALSE, bDecoded = PR_FALSE; - if ( (PR_TRUE == a->sigValid) && (PR_TRUE == b->sigValid) ) - { - /* both CRLs have been validated, choose the latest one */ - return SortCRLsByThisUpdate(arg1, arg2); - } - if (PR_TRUE == a->sigValid) - { - return 1; /* a is greater than b */ - } - if (PR_TRUE == b->sigValid) - { - return -1; /* a is not as good as b */ - } - aDecoded = GetOpaqueCRLFields(a->crl)->decodingError; - bDecoded = GetOpaqueCRLFields(b->crl)->decodingError; - /* neither CRL had its signature check pass */ - if ( (PR_FALSE == aDecoded) && (PR_FALSE == bDecoded) ) - { - /* both CRLs are proper DER, choose the latest one */ - return SortCRLsByThisUpdate(arg1, arg2); - } - if (PR_FALSE == aDecoded) - { - return 1; /* a is better than b */ - } - if (PR_FALSE == bDecoded) - { - return -1; /* a is not as good as b */ - } - /* both are invalid DER. sigh. */ - } - /* if they are equal, or if all else fails, use pointer differences */ - PORT_Assert(a != b); /* they should never be equal */ - return a>b?1:-1; -} - - -/* Pick best CRL to use . needs write access */ -static SECStatus DPCache_SelectCRL(CRLDPCache* cache) -{ - PRUint32 i; - PRBool valid = PR_TRUE; - CachedCrl* selected = NULL; - - PORT_Assert(cache); - if (!cache) - { - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; - } - /* if any invalid CRL is present, then the CRL cache is - considered invalid, for security reasons */ - for (i = 0 ; i<cache->ncrls; i++) - { - if (!cache->crls[i] || !cache->crls[i]->sigChecked || - !cache->crls[i]->sigValid) - { - valid = PR_FALSE; - break; - } - } - if (PR_TRUE == valid) - { - /* all CRLs are valid, clear this error */ - cache->invalid &= (~CRL_CACHE_INVALID_CRLS); - } else - { - /* some CRLs are invalid, set this error */ - cache->invalid |= CRL_CACHE_INVALID_CRLS; - } - - if (cache->invalid) - { - /* cache is in an invalid state, so destroy it */ - if (cache->selected) - { - if (SECSuccess != CachedCrl_Depopulate(cache->selected)) - { - PORT_Assert(0); - return SECFailure; - } - cache->selected = NULL; - } - /* also sort the CRLs imperfectly */ - qsort(cache->crls, cache->ncrls, sizeof(CachedCrl*), - SortImperfectCRLs); - return SECSuccess; - } - /* all CRLs are good, sort them by thisUpdate */ - qsort(cache->crls, cache->ncrls, sizeof(CachedCrl*), - SortCRLsByThisUpdate); - - if (cache->ncrls) - { - /* pick the newest CRL */ - selected = cache->crls[cache->ncrls-1]; - - /* and populate the cache */ - if (SECSuccess != CachedCrl_Populate(selected)) - { - return SECFailure; - } - } - - /* free the old CRL cache, if it's for a different CRL */ - if (cache->selected && cache->selected != selected) - { - if (SECSuccess != CachedCrl_Depopulate(cache->selected)) - { - return SECFailure; - } - } - - cache->selected = selected; - - return SECSuccess; -} - -/* initialize a DPCache object */ -static SECStatus DPCache_Create(CRLDPCache** returned, CERTCertificate* issuer, - SECItem* subject, SECItem* dp) -{ - CRLDPCache* cache = NULL; - PORT_Assert(returned); - /* issuer and dp are allowed to be NULL */ - if (!returned || !subject) - { - PORT_Assert(0); - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; - } - *returned = NULL; - cache = PORT_ZAlloc(sizeof(CRLDPCache)); - PORT_Assert(cache); - if (!cache) - { - return SECFailure; - } -#ifdef DPC_RWLOCK - cache->lock = NSSRWLock_New(NSS_RWLOCK_RANK_NONE, NULL); -#else - cache->lock = PR_NewLock(); -#endif - if (!cache->lock) - { - return SECFailure; - } - if (issuer) - { - cache->issuer = CERT_DupCertificate(issuer); - } - cache->distributionPoint = SECITEM_DupItem(dp); - cache->subject = SECITEM_DupItem(subject); - cache->lastfetch = 0; - cache->lastcheck = 0; - *returned = cache; - return SECSuccess; -} - -/* create an issuer cache object (per CA subject ) */ -static SECStatus IssuerCache_Create(CRLIssuerCache** returned, - CERTCertificate* issuer, - SECItem* subject, SECItem* dp) -{ - SECStatus rv = SECSuccess; - CRLIssuerCache* cache = NULL; - PORT_Assert(returned); - PORT_Assert(subject); - /* issuer and dp are allowed to be NULL */ - if (!returned || !subject) - { - PORT_Assert(0); - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; - } - *returned = NULL; - cache = (CRLIssuerCache*) PORT_ZAlloc(sizeof(CRLIssuerCache)); - if (!cache) - { - return SECFailure; - } - cache->subject = SECITEM_DupItem(subject); -#ifdef XCRL - cache->lock = NSSRWLock_New(NSS_RWLOCK_RANK_NONE, NULL); - if (!cache->lock) - { - rv = SECFailure; - } - if (SECSuccess == rv && issuer) - { - cache->issuer = CERT_DupCertificate(issuer); - if (!cache->issuer) - { - rv = SECFailure; - } - } -#endif - if (SECSuccess != rv) - { - PORT_Assert(SECSuccess == IssuerCache_Destroy(cache)); - return SECFailure; - } - *returned = cache; - return SECSuccess; -} - -/* add a DPCache to the issuer cache */ -static SECStatus IssuerCache_AddDP(CRLIssuerCache* cache, - CERTCertificate* issuer, - SECItem* subject, SECItem* dp, - CRLDPCache** newdpc) -{ - /* now create the required DP cache object */ - if (!cache || !subject || !newdpc) - { - PORT_Assert(0); - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; - } - if (!dp) - { - /* default distribution point */ - SECStatus rv = DPCache_Create(&cache->dpp, issuer, subject, NULL); - if (SECSuccess == rv) - { - *newdpc = cache->dpp; - return SECSuccess; - } - } - else - { - /* we should never hit this until we support multiple DPs */ - PORT_Assert(dp); - /* XCRL allocate a new distribution point cache object, initialize it, - and add it to the hash table of DPs */ - } - return SECFailure; -} - -/* add an IssuerCache to the global hash table of issuers */ -static SECStatus CRLCache_AddIssuer(CRLIssuerCache* issuer) -{ - PORT_Assert(issuer); - PORT_Assert(crlcache.issuers); - if (!issuer || !crlcache.issuers) - { - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; - } - if (NULL == PL_HashTableAdd(crlcache.issuers, (void*) issuer->subject, - (void*) issuer)) - { - return SECFailure; - } - return SECSuccess; -} - -/* retrieve the issuer cache object for a given issuer subject */ -static SECStatus CRLCache_GetIssuerCache(CRLCache* cache, SECItem* subject, - CRLIssuerCache** returned) -{ - /* we need to look up the issuer in the hash table */ - SECStatus rv = SECSuccess; - PORT_Assert(cache); - PORT_Assert(subject); - PORT_Assert(returned); - PORT_Assert(crlcache.issuers); - if (!cache || !subject || !returned || !crlcache.issuers) - { - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - rv = SECFailure; - } - - if (SECSuccess == rv) - { - *returned = (CRLIssuerCache*) PL_HashTableLookup(crlcache.issuers, - (void*) subject); - } - - return rv; -} - -/* retrieve the full CRL object that best matches the content of a DPCache */ -static CERTSignedCrl* GetBestCRL(CRLDPCache* cache, PRBool entries) -{ - CachedCrl* acrl = NULL; - - PORT_Assert(cache); - if (!cache) - { - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return NULL; - } - - if (0 == cache->ncrls) - { - /* empty cache*/ - return NULL; - } - - /* if we have a valid full CRL selected, return it */ - if (cache->selected) - { - return SEC_DupCrl(cache->selected->crl); - } - - /* otherwise, use latest valid DER CRL */ - acrl = cache->crls[cache->ncrls-1]; - - if (acrl && (PR_FALSE == GetOpaqueCRLFields(acrl->crl)->decodingError) ) - { - SECStatus rv = SECSuccess; - if (PR_TRUE == entries) - { - rv = CERT_CompleteCRLDecodeEntries(acrl->crl); - } - if (SECSuccess == rv) - { - return SEC_DupCrl(acrl->crl); - } - } - - return NULL; -} - -/* get a particular DPCache object from an IssuerCache */ -static CRLDPCache* IssuerCache_GetDPCache(CRLIssuerCache* cache, SECItem* dp) -{ - CRLDPCache* dpp = NULL; - PORT_Assert(cache); - /* XCRL for now we only support the "default" DP, ie. the - full CRL. So we can return the global one without locking. In - the future we will have a lock */ - PORT_Assert(NULL == dp); - if (!cache || dp) - { - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return NULL; - } -#ifdef XCRL - NSSRWLock_LockRead(cache->lock); -#endif - dpp = cache->dpp; -#ifdef XCRL - NSSRWLock_UnlockRead(cache->lock); -#endif - return dpp; -} - -/* get a DPCache object for the given issuer subject and dp - Automatically creates the cache object if it doesn't exist yet. - */ -static SECStatus AcquireDPCache(CERTCertificate* issuer, SECItem* subject, - SECItem* dp, int64 t, void* wincx, - CRLDPCache** dpcache, PRBool* writeLocked) -{ - SECStatus rv = SECSuccess; - CRLIssuerCache* issuercache = NULL; -#ifdef GLOBAL_RWLOCK - PRBool globalwrite = PR_FALSE; -#endif - PORT_Assert(crlcache.lock); - if (!crlcache.lock) - { - /* CRL cache is not initialized */ - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; - } -#ifdef GLOBAL_RWLOCK - NSSRWLock_LockRead(crlcache.lock); -#else - PR_Lock(crlcache.lock); -#endif - rv = CRLCache_GetIssuerCache(&crlcache, subject, &issuercache); - if (SECSuccess != rv) - { -#ifdef GLOBAL_RWLOCK - NSSRWLock_UnlockRead(crlcache.lock); -#else - PR_Unlock(crlcache.lock); -#endif - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; - } - if (!issuercache) - { - /* there is no cache for this issuer yet. This means this is the - first time we look up a cert from that issuer, and we need to - create the cache. */ - - rv = IssuerCache_Create(&issuercache, issuer, subject, dp); - if (SECSuccess == rv && !issuercache) - { - PORT_Assert(issuercache); - rv = SECFailure; - } - - if (SECSuccess == rv) - { - /* This is the first time we look up a cert of this issuer. - Create the DPCache for this DP . */ - rv = IssuerCache_AddDP(issuercache, issuer, subject, dp, dpcache); - } - - if (SECSuccess == rv) - { - /* lock the DPCache for write to ensure the update happens in this - thread */ - *writeLocked = PR_TRUE; -#ifdef DPC_RWLOCK - NSSRWLock_LockWrite((*dpcache)->lock); -#else - PR_Lock((*dpcache)->lock); -#endif - } - - if (SECSuccess == rv) - { - /* now add the new issuer cache to the global hash table of - issuers */ -#ifdef GLOBAL_RWLOCK - CRLIssuerCache* existing = NULL; - NSSRWLock_UnlockRead(crlcache.lock); - /* when using a r/w lock for the global cache, check if the issuer - already exists before adding to the hash table */ - NSSRWLock_LockWrite(crlcache.lock); - globalwrite = PR_TRUE; - rv = CRLCache_GetIssuerCache(&crlcache, subject, &existing); - if (!existing) - { -#endif - rv = CRLCache_AddIssuer(issuercache); - if (SECSuccess != rv) - { - /* failure */ - rv = SECFailure; - } -#ifdef GLOBAL_RWLOCK - } - else - { - /* somebody else updated before we did */ - IssuerCache_Destroy(issuercache); /* destroy the new object */ - issuercache = existing; /* use the existing one */ - *dpcache = IssuerCache_GetDPCache(issuercache, dp); - } -#endif - } - - /* now unlock the global cache. We only want to lock the issuer hash - table addition. Holding it longer would hurt scalability */ -#ifdef GLOBAL_RWLOCK - if (PR_TRUE == globalwrite) - { - NSSRWLock_UnlockWrite(crlcache.lock); - globalwrite = PR_FALSE; - } - else - { - NSSRWLock_UnlockRead(crlcache.lock); - } -#else - PR_Unlock(crlcache.lock); -#endif - - /* if there was a failure adding an issuer cache object, destroy it */ - if (SECSuccess != rv && issuercache) - { - if (PR_TRUE == *writeLocked) - { -#ifdef DPC_RWLOCK - NSSRWLock_UnlockWrite((*dpcache)->lock); -#else - PR_Unlock((*dpcache)->lock); -#endif - } - IssuerCache_Destroy(issuercache); - issuercache = NULL; - } - - if (SECSuccess != rv) - { - return SECFailure; - } - } else - { -#ifdef GLOBAL_RWLOCK - NSSRWLock_UnlockRead(crlcache.lock); -#else - PR_Unlock(crlcache.lock); -#endif - *dpcache = IssuerCache_GetDPCache(issuercache, dp); - } - /* we now have a DPCache that we can use for lookups */ - /* lock it for read, unless we already locked for write */ - if (PR_FALSE == *writeLocked) - { -#ifdef DPC_RWLOCK - NSSRWLock_LockRead((*dpcache)->lock); -#else - PR_Lock((*dpcache)->lock); -#endif - } - - if (SECSuccess == rv) - { - /* currently there is always one and only one DPCache per issuer */ - PORT_Assert(*dpcache); - if (*dpcache) - { - /* make sure the DP cache is up to date before using it */ - rv = DPCache_GetUpToDate(*dpcache, issuer, PR_FALSE == *writeLocked, - t, wincx); - } - else - { - rv = SECFailure; - } - } - return rv; -} - -/* unlock access to the DPCache */ -static void ReleaseDPCache(CRLDPCache* dpcache, PRBool writeLocked) -{ - if (!dpcache) - { - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return; - } -#ifdef DPC_RWLOCK - if (PR_TRUE == writeLocked) - { - NSSRWLock_UnlockWrite(dpcache->lock); - } - else - { - NSSRWLock_UnlockRead(dpcache->lock); - } -#else - PR_Unlock(dpcache->lock); -#endif -} - -/* check CRL revocation status of given certificate and issuer */ -SECStatus -CERT_CheckCRL(CERTCertificate* cert, CERTCertificate* issuer, SECItem* dp, - int64 t, void* wincx) -{ - PRBool lockedwrite = PR_FALSE; - SECStatus rv = SECSuccess; - CRLDPCache* dpcache = NULL; - if (!cert || !issuer) - { - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; - } - - if (SECSuccess != CERT_CheckCertValidTimes(issuer, t, PR_FALSE)) - { - /* we won't be able to check the CRL's signature if the issuer cert - is expired as of the time we are verifying. This may cause a valid - CRL to be cached as bad. short-circuit to avoid this case. */ - PORT_SetError(SEC_ERROR_EXPIRED_ISSUER_CERTIFICATE); - return SECFailure; - } - - rv = AcquireDPCache(issuer, &issuer->derSubject, dp, t, wincx, &dpcache, - &lockedwrite); - - if (SECSuccess == rv) - { - /* now look up the certificate SN in the DP cache's CRL */ - CERTCrlEntry* entry = NULL; - rv = DPCache_Lookup(dpcache, &cert->serialNumber, &entry); - if (SECSuccess == rv && entry) - { - /* check the time if we have one */ - if (entry->revocationDate.data && entry->revocationDate.len) - { - int64 revocationDate = 0; - if (SECSuccess == DER_DecodeTimeChoice(&revocationDate, - &entry->revocationDate)) - { - /* we got a good revocation date, only consider the - certificate revoked if the time we are inquiring about - is past the revocation date */ - if (t>=revocationDate) - { - rv = SECFailure; - } - } else { - /* invalid revocation date, consider the certificate - permanently revoked */ - rv = SECFailure; - } - } else { - /* no revocation date, certificate is permanently revoked */ - rv = SECFailure; - } - if (SECFailure == rv) - { - PORT_SetError(SEC_ERROR_REVOKED_CERTIFICATE); - } - } - } - - ReleaseDPCache(dpcache, lockedwrite); - return rv; -} - -/* retrieve full CRL object that best matches the cache status */ -CERTSignedCrl * -SEC_FindCrlByName(CERTCertDBHandle *handle, SECItem *crlKey, int type) -{ - CERTSignedCrl* acrl = NULL; - CRLDPCache* dpcache = NULL; - SECStatus rv = SECSuccess; - PRBool writeLocked = PR_FALSE; - - if (!crlKey) - { - PORT_SetError(SEC_ERROR_INVALID_ARGS); - return NULL; - } - - rv = AcquireDPCache(NULL, crlKey, NULL, 0, NULL, &dpcache, &writeLocked); - if (SECSuccess == rv) - { - acrl = GetBestCRL(dpcache, PR_TRUE); /* decode entries, because - SEC_FindCrlByName always returned fully decoded CRLs in the past */ - ReleaseDPCache(dpcache, writeLocked); - } - return acrl; -} - -/* invalidate the CRL cache for a given issuer, which forces a refetch of - CRL objects from PKCS#11 tokens */ -void CERT_CRLCacheRefreshIssuer(CERTCertDBHandle* dbhandle, SECItem* crlKey) -{ - CRLDPCache* cache = NULL; - SECStatus rv = SECSuccess; - PRBool writeLocked = PR_FALSE; - PRBool readlocked; - - (void) dbhandle; /* silence compiler warnings */ - - /* XCRL we will need to refresh all the DPs of the issuer in the future, - not just the default one */ - rv = AcquireDPCache(NULL, crlKey, NULL, 0, NULL, &cache, &writeLocked); - if (SECSuccess != rv) - { - return; - } - /* we need to invalidate the DPCache here */ - readlocked = (writeLocked == PR_TRUE? PR_FALSE : PR_TRUE); - DPCache_LockWrite(); - cache->refresh = PR_TRUE; - DPCache_UnlockWrite(); - ReleaseDPCache(cache, writeLocked); - return; -} - -/* add the specified RAM CRL object to the cache */ -SECStatus CERT_CacheCRL(CERTCertDBHandle* dbhandle, SECItem* newdercrl) -{ - CRLDPCache* cache = NULL; - SECStatus rv = SECSuccess; - PRBool writeLocked = PR_FALSE; - PRBool readlocked; - CachedCrl* returned = NULL; - PRBool added = PR_FALSE; - CERTSignedCrl* newcrl = NULL; - int realerror = 0; - - if (!dbhandle || !newdercrl) - { - PORT_SetError(SEC_ERROR_INVALID_ARGS); - return SECFailure; - } - - /* first decode the DER CRL to make sure it's OK */ - newcrl = CERT_DecodeDERCrlWithFlags(NULL, newdercrl, SEC_CRL_TYPE, - CRL_DECODE_DONT_COPY_DER | - CRL_DECODE_SKIP_ENTRIES); - - if (!newcrl) - { - return SECFailure; - } - - rv = AcquireDPCache(NULL, - &newcrl->crl.derName, - NULL, 0, NULL, &cache, &writeLocked); - if (SECSuccess == rv) - { - readlocked = (writeLocked == PR_TRUE? PR_FALSE : PR_TRUE); - - rv = CachedCrl_Create(&returned, newcrl, CRL_OriginExplicit); - if (SECSuccess == rv && returned) - { - DPCache_LockWrite(); - rv = DPCache_AddCRL(cache, returned, &added); - if (PR_TRUE != added) - { - realerror = PORT_GetError(); - CachedCrl_Destroy(returned); - returned = NULL; - } - DPCache_UnlockWrite(); - } - - ReleaseDPCache(cache, writeLocked); - - if (!added) - { - rv = SECFailure; - } - } - SEC_DestroyCrl(newcrl); /* free the CRL. Either it got added to the cache - and the refcount got bumped, or not, and thus we need to free its - RAM */ - if (realerror) - { - PORT_SetError(realerror); - } - return rv; -} - -/* remove the specified RAM CRL object from the cache */ -SECStatus CERT_UncacheCRL(CERTCertDBHandle* dbhandle, SECItem* olddercrl) -{ - CRLDPCache* cache = NULL; - SECStatus rv = SECSuccess; - PRBool writeLocked = PR_FALSE; - PRBool readlocked; - PRBool removed = PR_FALSE; - PRUint32 i; - CERTSignedCrl* oldcrl = NULL; - - if (!dbhandle || !olddercrl) - { - PORT_SetError(SEC_ERROR_INVALID_ARGS); - return SECFailure; - } - - /* first decode the DER CRL to make sure it's OK */ - oldcrl = CERT_DecodeDERCrlWithFlags(NULL, olddercrl, SEC_CRL_TYPE, - CRL_DECODE_DONT_COPY_DER | - CRL_DECODE_SKIP_ENTRIES); - - if (!oldcrl) - { - /* if this DER CRL can't decode, it can't be in the cache */ - return SECFailure; - } - - rv = AcquireDPCache(NULL, - &oldcrl->crl.derName, - NULL, 0, NULL, &cache, &writeLocked); - if (SECSuccess == rv) - { - CachedCrl* returned = NULL; - - readlocked = (writeLocked == PR_TRUE? PR_FALSE : PR_TRUE); - - rv = CachedCrl_Create(&returned, oldcrl, CRL_OriginExplicit); - if (SECSuccess == rv && returned) - { - DPCache_LockWrite(); - for (i=0;i<cache->ncrls;i++) - { - PRBool dupe = PR_FALSE, updated = PR_FALSE; - rv = CachedCrl_Compare(returned, cache->crls[i], - &dupe, &updated); - if (SECSuccess != rv) - { - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - break; - } - if (PR_TRUE == dupe) - { - DPCache_RemoveCRL(cache, i); /* got a match */ - cache->mustchoose = PR_TRUE; - removed = PR_TRUE; - break; - } - } - - DPCache_UnlockWrite(); - } - - ReleaseDPCache(cache, writeLocked); - - if (PR_TRUE != removed) - { - rv = SECFailure; - } - } - SEC_DestroyCrl(oldcrl); /* need to do this because object is refcounted */ - if (PR_TRUE != removed) - { - PORT_SetError(SEC_ERROR_CRL_NOT_FOUND); - } - return rv; -} - -static SECStatus CachedCrl_Create(CachedCrl** returned, CERTSignedCrl* crl, - CRLOrigin origin) -{ - CachedCrl* newcrl = NULL; - if (!returned) - { - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; - } - newcrl = PORT_ZAlloc(sizeof(CachedCrl)); - if (!newcrl) - { - return SECFailure; - } - newcrl->crl = SEC_DupCrl(crl); - newcrl->origin = origin; - *returned = newcrl; - return SECSuccess; -} - -/* empty the cache content */ -static SECStatus CachedCrl_Depopulate(CachedCrl* crl) -{ - if (!crl) - { - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; - } - /* destroy the hash table */ - if (crl->entries) - { - PL_HashTableDestroy(crl->entries); - crl->entries = NULL; - } - - /* free the pre buffer */ - if (crl->prebuffer) - { - PreAllocator_Destroy(crl->prebuffer); - crl->prebuffer = NULL; - } - return SECSuccess; -} - -static SECStatus CachedCrl_Destroy(CachedCrl* crl) -{ - if (!crl) - { - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; - } - CachedCrl_Depopulate(crl); - SEC_DestroyCrl(crl->crl); - PORT_Free(crl); - return SECSuccess; -} - -/* create hash table of CRL entries */ -static SECStatus CachedCrl_Populate(CachedCrl* crlobject) -{ - SECStatus rv = SECFailure; - CERTCrlEntry** crlEntry = NULL; - PRUint32 numEntries = 0; - - if (!crlobject) - { - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; - } - /* complete the entry decoding . XXX thread-safety of CRL object */ - rv = CERT_CompleteCRLDecodeEntries(crlobject->crl); - if (SECSuccess != rv) - { - return SECFailure; - } - - if (crlobject->entries && crlobject->prebuffer) - { - /* cache is already built */ - return SECSuccess; - } - - /* build the hash table from the full CRL */ - /* count CRL entries so we can pre-allocate space for hash table entries */ - for (crlEntry = crlobject->crl->crl.entries; crlEntry && *crlEntry; - crlEntry++) - { - numEntries++; - } - crlobject->prebuffer = PreAllocator_Create(numEntries*sizeof(PLHashEntry)); - PORT_Assert(crlobject->prebuffer); - if (!crlobject->prebuffer) - { - return SECFailure; - } - /* create a new hash table */ - crlobject->entries = PL_NewHashTable(0, SECITEM_Hash, SECITEM_HashCompare, - PL_CompareValues, &preAllocOps, crlobject->prebuffer); - PORT_Assert(crlobject->entries); - if (!crlobject->entries) - { - return SECFailure; - } - /* add all serial numbers to the hash table */ - for (crlEntry = crlobject->crl->crl.entries; crlEntry && *crlEntry; - crlEntry++) - { - PL_HashTableAdd(crlobject->entries, &(*crlEntry)->serialNumber, - *crlEntry); - } - - return SECSuccess; -} - -/* returns true if there are CRLs from PKCS#11 slots */ -static PRBool DPCache_HasTokenCRLs(CRLDPCache* cache) -{ - PRBool answer = PR_FALSE; - PRUint32 i; - for (i=0;i<cache->ncrls;i++) - { - if (cache->crls[i] && (CRL_OriginToken == cache->crls[i]->origin) ) - { - answer = PR_TRUE; - break; - } - } - return answer; -} - -/* are these CRLs the same, as far as the cache is concerned ? */ -/* are these CRLs the same token object but with different DER ? - This can happen if the DER CRL got updated in the token, but the PKCS#11 - object ID did not change. NSS softoken has the unfortunate property to - never change the object ID for CRL objects. */ -static SECStatus CachedCrl_Compare(CachedCrl* a, CachedCrl* b, PRBool* isDupe, - PRBool* isUpdated) -{ - PORT_Assert(a); - PORT_Assert(b); - PORT_Assert(isDupe); - PORT_Assert(isUpdated); - if (!a || !b || !isDupe || !isUpdated || !a->crl || !b->crl) - { - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; - } - - *isDupe = *isUpdated = PR_FALSE; - - if (a == b) - { - /* dupe */ - *isDupe = PR_TRUE; - *isUpdated = PR_FALSE; - return SECSuccess; - } - if (b->origin != a->origin) - { - /* CRLs of different origins are not considered dupes, - and can't be updated either */ - return SECSuccess; - } - if (CRL_OriginToken == b->origin) - { - /* for token CRLs, slot and PKCS#11 object handle must match for CRL - to truly be a dupe */ - if ( (b->crl->slot == a->crl->slot) && - (b->crl->pkcs11ID == a->crl->pkcs11ID) ) - { - /* ASN.1 DER needs to match for dupe check */ - /* could optimize by just checking a few fields like thisUpdate */ - if ( SECEqual == SECITEM_CompareItem(b->crl->derCrl, - a->crl->derCrl) ) - { - *isDupe = PR_TRUE; - } - else - { - *isUpdated = PR_TRUE; - } - } - return SECSuccess; - } - if (CRL_OriginExplicit == b->origin) - { - /* We need to make sure this is the same object that the user provided - to CERT_CacheCRL previously. That API takes a SECItem*, thus, we - just do a pointer comparison here. - */ - if (b->crl->derCrl == a->crl->derCrl) - { - *isDupe = PR_TRUE; - } - } - return SECSuccess; -} - - - |