pjs/security/nss/lib/certdb/crl.c

730 строки
19 KiB
C

/*
* 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 Netscape are
* Copyright (C) 1994-2000 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU General Public License Version 2 or later (the
* "GPL"), in which case the provisions of the GPL are applicable
* instead of those above. If you wish to allow use of your
* version of this file only under the terms of the GPL and not to
* allow others to use your version of this file under the MPL,
* indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by
* the GPL. If you do not delete the provisions above, a recipient
* may use your version of this file under either the MPL or the
* GPL.
*/
/*
* Moved from secpkcs7.c
*
* $Id: crl.c,v 1.14 2002-08-08 01:55:34 jpierre%netscape.com Exp $
*/
#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"
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_UTC_TIME,
offsetof(CERTCrlEntry,revocationDate) },
{ 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_UTC_TIME,
offsetof(CERTCrl,lastUpdate) },
{ SEC_ASN1_OPTIONAL | SEC_ASN1_UTC_TIME,
offsetof(CERTCrl,nextUpdate) },
{ 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_UTC_TIME,
offsetof(CERTCrl,lastUpdate) },
{ SEC_ASN1_OPTIONAL | SEC_ASN1_UTC_TIME,
offsetof(CERTCrl,nextUpdate) },
{ 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_UTC_TIME },
{ SEC_ASN1_SKIP | SEC_ASN1_OPTIONAL | SEC_ASN1_UTC_TIME },
{ SEC_ASN1_OPTIONAL | SEC_ASN1_SEQUENCE_OF,
offsetof(CERTCrl,entries),
cert_CrlEntryTemplate }, /* decode entries */
{ SEC_ASN1_SKIP_REST },
{ 0 }
};
static 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 },
};
/* 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)
{
CERTCrlEntry **entries;
CERTCrlEntry *entry;
PRBool hasCriticalExten = PR_FALSE;
SECStatus rv = SECSuccess;
int version;
/* CRL version is defaulted to v1 */
version = SEC_CRL_VERSION_1;
if (crl->version.data != 0)
version = (int)DER_GetUInteger (&crl->version);
if (version > SEC_CRL_VERSION_2) {
PORT_SetError (SEC_ERROR_BAD_DER);
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)
return (SECFailure);
/* make sure that there is no unknown critical extension */
if (cert_HasUnknownCriticalExten (crl->extensions) == PR_TRUE) {
PORT_SetError (SEC_ERROR_UNKNOWN_CRITICAL_EXTENSION);
return (SECFailure);
}
}
}
if (crl->entries == NULL) {
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 && version != SEC_CRL_VERSION_2) {
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_UNKNOWN_CRITICAL_EXTENSION);
rv = SECFailure;
break;
}
}
++entries;
}
if (rv == SECFailure)
return (rv);
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);
}
SECStatus CERT_CompleteCRLDecodeEntries(CERTSignedCrl* crl)
{
SECStatus rv = SECSuccess;
SECItem* crldata = NULL;
OpaqueCRLFields* extended = NULL;
if ( (!crl) ||
(!(extended = (OpaqueCRLFields*) crl->opaque)) ) {
rv = SECFailure;
} else {
if (PR_FALSE == extended->partial) {
/* the CRL has already been fully decoded */
return SECSuccess;
}
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;
}
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_DecodeDERCrlEx(PRArenaPool *narena, SECItem *derSignedCrl, int type,
PRInt32 options)
{
PRArenaPool *arena;
CERTSignedCrl *crl;
SECStatus rv;
OpaqueCRLFields* extended = NULL;
const SEC_ASN1Template* crlTemplate = cert_SignedCrlTemplate;
/* make a new arena */
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 ) {
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_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)
break;
/* check for critical extentions */
rv = cert_check_crl_version (&crl->crl);
break;
case SEC_KRL_TYPE:
rv = SEC_ASN1DecodeItem
(arena, crl, cert_SignedKrlTemplate, derSignedCrl);
break;
default:
rv = SECFailure;
break;
}
if (rv != SECSuccess) {
goto loser;
}
crl->referenceCount = 1;
return(crl);
loser:
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_DecodeDERCrlEx(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....?
*/
CERTSignedCrl *
SEC_FindCrlByKeyOnSlot(PK11SlotInfo *slot, SECItem *crlKey, int type)
{
CERTSignedCrl *crl = NULL;
SECItem *derCrl;
CK_OBJECT_HANDLE crlHandle;
char *url = NULL;
if (slot) {
PK11_ReferenceSlot(slot);
}
derCrl = PK11_FindCrlByName(&slot, &crlHandle, crlKey, type, &url);
if (derCrl == NULL) {
goto loser;
}
PORT_Assert(crlHandle != CK_INVALID_HANDLE);
crl = CERT_DecodeDERCrl(NULL, derCrl, type);
if (crl) {
crl->slot = slot;
slot = NULL; /* adopt it */
crl->pkcs11ID = crlHandle;
if (url) {
crl->url = PORT_ArenaStrdup(crl->arena,url);
}
}
if (url) {
PORT_Free(url);
}
loser:
if (slot) {
PK11_FreeSlot(slot);
}
if (derCrl) {
SECITEM_FreeItem(derCrl,PR_TRUE);
}
return(crl);
}
SECStatus SEC_DestroyCrl(CERTSignedCrl *crl);
CERTSignedCrl *
crl_storeCRL (PK11SlotInfo *slot,char *url,
CERTSignedCrl *newCrl, SECItem *derCrl, int type)
{
CERTSignedCrl *oldCrl = NULL, *crl = NULL;
CK_OBJECT_HANDLE crlHandle;
oldCrl = SEC_FindCrlByKeyOnSlot(slot, &newCrl->crl.derName, type);
/* if there is an old crl, 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 */
SEC_DeletePermCRL(oldCrl);
}
/* 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) SEC_DestroyCrl(oldCrl);
return crl;
}
CERTSignedCrl *
SEC_FindCrlByName(CERTCertDBHandle *handle, SECItem *crlKey, int type)
{
return SEC_FindCrlByKeyOnSlot(NULL,crlKey,type);
}
/*
*
* 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);
}
SECStatus
SEC_DestroyCrl(CERTSignedCrl *crl)
{
if (crl) {
if (crl->referenceCount-- <= 1) {
if (crl->slot) {
PK11_FreeSlot(crl->slot);
}
PORT_FreeArena(crl->arena, PR_FALSE);
}
}
return SECSuccess;
}
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_SetOfSignedCrlTemplate)