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gecko/security/nss/lib/certhigh/certvfy.c
Kai Engert 2b43284096 Bug 486182, Land NSS 3.12.3 final in mozilla-central 
r=nelson
2009-04-07 03:36:45 +02:00

1997 lines
58 KiB
C
Raw Blame History

/* ***** 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 ***** */
#include "nspr.h"
#include "secerr.h"
#include "secport.h"
#include "seccomon.h"
#include "secoid.h"
#include "sslerr.h"
#include "genname.h"
#include "keyhi.h"
#include "cert.h"
#include "certdb.h"
#include "certi.h"
#include "cryptohi.h"
#include "pkix.h"
/*#include "pkix_sample_modules.h" */
#include "pkix_pl_cert.h"
#include "nsspki.h"
#include "pkitm.h"
#include "pkim.h"
#include "pki3hack.h"
#include "base.h"
/*
* Check the validity times of a certificate
*/
SECStatus
CERT_CertTimesValid(CERTCertificate *c)
{
SECCertTimeValidity valid = CERT_CheckCertValidTimes(c, PR_Now(), PR_TRUE);
return (valid == secCertTimeValid) ? SECSuccess : SECFailure;
}
/*
* verify the signature of a signed data object with the given DER publickey
*/
SECStatus
CERT_VerifySignedDataWithPublicKey(CERTSignedData *sd,
SECKEYPublicKey *pubKey,
void *wincx)
{
SECStatus rv;
SECItem sig;
SECOidTag hashAlg = SEC_OID_UNKNOWN;
if ( !pubKey || !sd ) {
PORT_SetError(PR_INVALID_ARGUMENT_ERROR);
return SECFailure;
}
/* check the signature */
sig = sd->signature;
/* convert sig->len from bit counts to byte count. */
DER_ConvertBitString(&sig);
rv = VFY_VerifyDataWithAlgorithmID(sd->data.data, sd->data.len, pubKey,
&sig, &sd->signatureAlgorithm, &hashAlg, wincx);
if (rv == SECSuccess) {
/* Are we honoring signatures for this algorithm? */
PRUint32 policyFlags = 0;
rv = NSS_GetAlgorithmPolicy(hashAlg, &policyFlags);
if (rv == SECSuccess &&
!(policyFlags & NSS_USE_ALG_IN_CERT_SIGNATURE)) {
PORT_SetError(SEC_ERROR_INVALID_ALGORITHM);
rv = SECFailure;
}
}
return rv;
}
/*
* verify the signature of a signed data object with the given DER publickey
*/
SECStatus
CERT_VerifySignedDataWithPublicKeyInfo(CERTSignedData *sd,
CERTSubjectPublicKeyInfo *pubKeyInfo,
void *wincx)
{
SECKEYPublicKey *pubKey;
SECStatus rv = SECFailure;
/* get cert's public key */
pubKey = SECKEY_ExtractPublicKey(pubKeyInfo);
if (pubKey) {
rv = CERT_VerifySignedDataWithPublicKey(sd, pubKey, wincx);
SECKEY_DestroyPublicKey(pubKey);
}
return rv;
}
/*
* verify the signature of a signed data object with the given certificate
*/
SECStatus
CERT_VerifySignedData(CERTSignedData *sd, CERTCertificate *cert,
int64 t, void *wincx)
{
SECKEYPublicKey *pubKey = 0;
SECStatus rv = SECFailure;
SECCertTimeValidity validity;
/* check the certificate's validity */
validity = CERT_CheckCertValidTimes(cert, t, PR_FALSE);
if ( validity != secCertTimeValid ) {
return rv;
}
/* get cert's public key */
pubKey = CERT_ExtractPublicKey(cert);
if (pubKey) {
rv = CERT_VerifySignedDataWithPublicKey(sd, pubKey, wincx);
SECKEY_DestroyPublicKey(pubKey);
}
return rv;
}
/* Software FORTEZZA installation hack. The software fortezza installer does
* not have access to the krl and cert.db file. Accept FORTEZZA Certs without
* KRL's in this case.
*/
static int dont_use_krl = 0;
/* not a public exposed function... */
void sec_SetCheckKRLState(int value) { dont_use_krl = value; }
SECStatus
SEC_CheckKRL(CERTCertDBHandle *handle,SECKEYPublicKey *key,
CERTCertificate *rootCert, int64 t, void * wincx)
{
CERTSignedCrl *crl = NULL;
SECStatus rv = SECFailure;
SECStatus rv2;
CERTCrlEntry **crlEntry;
SECCertTimeValidity validity;
CERTCertificate *issuerCert = NULL;
if (dont_use_krl) return SECSuccess;
/* first look up the KRL */
crl = SEC_FindCrlByName(handle,&rootCert->derSubject, SEC_KRL_TYPE);
if (crl == NULL) {
PORT_SetError(SEC_ERROR_NO_KRL);
goto done;
}
/* get the issuing certificate */
issuerCert = CERT_FindCertByName(handle, &crl->crl.derName);
if (issuerCert == NULL) {
PORT_SetError(SEC_ERROR_KRL_BAD_SIGNATURE);
goto done;
}
/* now verify the KRL signature */
rv2 = CERT_VerifySignedData(&crl->signatureWrap, issuerCert, t, wincx);
if (rv2 != SECSuccess) {
PORT_SetError(SEC_ERROR_KRL_BAD_SIGNATURE);
goto done;
}
/* Verify the date validity of the KRL */
validity = SEC_CheckCrlTimes(&crl->crl, t);
if (validity == secCertTimeExpired) {
PORT_SetError(SEC_ERROR_KRL_EXPIRED);
goto done;
}
/* now make sure the key in this cert is still valid */
if (key->keyType != fortezzaKey) {
PORT_SetError(SSL_ERROR_BAD_CERT_DOMAIN);
goto done; /* This should be an assert? */
}
/* now make sure the key is not on the revocation list */
for (crlEntry = crl->crl.entries; crlEntry && *crlEntry; crlEntry++) {
if (PORT_Memcmp((*crlEntry)->serialNumber.data,
key->u.fortezza.KMID,
(*crlEntry)->serialNumber.len) == 0) {
PORT_SetError(SEC_ERROR_REVOKED_KEY);
goto done;
}
}
rv = SECSuccess;
done:
if (issuerCert) CERT_DestroyCertificate(issuerCert);
if (crl) SEC_DestroyCrl(crl);
return rv;
}
SECStatus
SEC_CheckCRL(CERTCertDBHandle *handle,CERTCertificate *cert,
CERTCertificate *caCert, int64 t, void * wincx)
{
return CERT_CheckCRL(cert, caCert, NULL, t, wincx);
}
/*
* Find the issuer of a cert. Use the authorityKeyID if it exists.
*/
CERTCertificate *
CERT_FindCertIssuer(CERTCertificate *cert, int64 validTime, SECCertUsage usage)
{
NSSCertificate *me;
NSSTime *nssTime;
NSSTrustDomain *td;
NSSCryptoContext *cc;
NSSCertificate *chain[3];
NSSUsage nssUsage;
PRStatus status;
me = STAN_GetNSSCertificate(cert);
if (!me) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
return NULL;
}
nssTime = NSSTime_SetPRTime(NULL, validTime);
nssUsage.anyUsage = PR_FALSE;
nssUsage.nss3usage = usage;
nssUsage.nss3lookingForCA = PR_TRUE;
memset(chain, 0, 3*sizeof(NSSCertificate *));
td = STAN_GetDefaultTrustDomain();
cc = STAN_GetDefaultCryptoContext();
(void)NSSCertificate_BuildChain(me, nssTime, &nssUsage, NULL,
chain, 2, NULL, &status, td, cc);
nss_ZFreeIf(nssTime);
if (status == PR_SUCCESS) {
PORT_Assert(me == chain[0]);
/* if it's a root, the chain will only have one cert */
if (!chain[1]) {
/* already has a reference from the call to BuildChain */
return cert;
}
NSSCertificate_Destroy(chain[0]); /* the first cert in the chain */
return STAN_GetCERTCertificate(chain[1]); /* return the 2nd */
}
if (chain[0]) {
PORT_Assert(me == chain[0]);
NSSCertificate_Destroy(chain[0]); /* the first cert in the chain */
}
PORT_SetError (SEC_ERROR_UNKNOWN_ISSUER);
return NULL;
}
/*
* return required trust flags for various cert usages for CAs
*/
SECStatus
CERT_TrustFlagsForCACertUsage(SECCertUsage usage,
unsigned int *retFlags,
SECTrustType *retTrustType)
{
unsigned int requiredFlags;
SECTrustType trustType;
switch ( usage ) {
case certUsageSSLClient:
requiredFlags = CERTDB_TRUSTED_CLIENT_CA;
trustType = trustSSL;
break;
case certUsageSSLServer:
case certUsageSSLCA:
requiredFlags = CERTDB_TRUSTED_CA;
trustType = trustSSL;
break;
case certUsageSSLServerWithStepUp:
requiredFlags = CERTDB_TRUSTED_CA | CERTDB_GOVT_APPROVED_CA;
trustType = trustSSL;
break;
case certUsageEmailSigner:
case certUsageEmailRecipient:
requiredFlags = CERTDB_TRUSTED_CA;
trustType = trustEmail;
break;
case certUsageObjectSigner:
requiredFlags = CERTDB_TRUSTED_CA;
trustType = trustObjectSigning;
break;
case certUsageVerifyCA:
case certUsageAnyCA:
case certUsageStatusResponder:
requiredFlags = CERTDB_TRUSTED_CA;
trustType = trustTypeNone;
break;
default:
PORT_Assert(0);
goto loser;
}
if ( retFlags != NULL ) {
*retFlags = requiredFlags;
}
if ( retTrustType != NULL ) {
*retTrustType = trustType;
}
return(SECSuccess);
loser:
return(SECFailure);
}
void
cert_AddToVerifyLog(CERTVerifyLog *log, CERTCertificate *cert, unsigned long error,
unsigned int depth, void *arg)
{
CERTVerifyLogNode *node, *tnode;
PORT_Assert(log != NULL);
node = (CERTVerifyLogNode *)PORT_ArenaAlloc(log->arena,
sizeof(CERTVerifyLogNode));
if ( node != NULL ) {
node->cert = CERT_DupCertificate(cert);
node->error = error;
node->depth = depth;
node->arg = arg;
if ( log->tail == NULL ) {
/* empty list */
log->head = log->tail = node;
node->prev = NULL;
node->next = NULL;
} else if ( depth >= log->tail->depth ) {
/* add to tail */
node->prev = log->tail;
log->tail->next = node;
log->tail = node;
node->next = NULL;
} else if ( depth < log->head->depth ) {
/* add at head */
node->prev = NULL;
node->next = log->head;
log->head->prev = node;
log->head = node;
} else {
/* add in middle */
tnode = log->tail;
while ( tnode != NULL ) {
if ( depth >= tnode->depth ) {
/* insert after tnode */
node->prev = tnode;
node->next = tnode->next;
tnode->next->prev = node;
tnode->next = node;
break;
}
tnode = tnode->prev;
}
}
log->count++;
}
return;
}
#define EXIT_IF_NOT_LOGGING(log) \
if ( log == NULL ) { \
goto loser; \
}
#define LOG_ERROR_OR_EXIT(log,cert,depth,arg) \
if ( log != NULL ) { \
cert_AddToVerifyLog(log, cert, PORT_GetError(), depth, (void *)arg); \
} else { \
goto loser; \
}
#define LOG_ERROR(log,cert,depth,arg) \
if ( log != NULL ) { \
cert_AddToVerifyLog(log, cert, PORT_GetError(), depth, (void *)arg); \
}
typedef enum { cbd_None, cbd_User, cbd_CA } cbd_FortezzaType;
static SECStatus
cert_VerifyFortezzaV1Cert(CERTCertDBHandle *handle, CERTCertificate *cert,
cbd_FortezzaType *next_type, cbd_FortezzaType last_type,
int64 t, void *wincx)
{
unsigned char priv = 0;
SECKEYPublicKey *key;
SECStatus rv;
*next_type = cbd_CA;
/* read the key */
key = CERT_ExtractPublicKey(cert);
/* Cant' get Key? fail. */
if (key == NULL) {
PORT_SetError(SEC_ERROR_BAD_KEY);
return SECFailure;
}
/* if the issuer is not an old fortezza cert, we bail */
if (key->keyType != fortezzaKey) {
SECKEY_DestroyPublicKey(key);
/* CA Cert not fortezza */
PORT_SetError(SEC_ERROR_NOT_FORTEZZA_ISSUER);
return SECFailure;
}
/* get the privilege mask */
if (key->u.fortezza.DSSpriviledge.len > 0) {
priv = key->u.fortezza.DSSpriviledge.data[0];
}
/*
* make sure the CA's keys are OK
*/
rv = SEC_CheckKRL(handle, key, NULL, t, wincx);
SECKEY_DestroyPublicKey(key);
if (rv != SECSuccess) {
return rv;
}
switch (last_type) {
case cbd_User:
/* first check for subordination */
/*rv = FortezzaSubordinateCheck(cert,issuerCert);*/
rv = SECSuccess;
/* now check for issuer privilege */
if ((rv != SECSuccess) || ((priv & 0x10) == 0)) {
/* bail */
PORT_SetError (SEC_ERROR_CA_CERT_INVALID);
return SECFailure;
}
break;
case cbd_CA:
if ((priv & 0x20) == 0) {
/* bail */
PORT_SetError (SEC_ERROR_CA_CERT_INVALID);
return SECFailure;
}
break;
case cbd_None:
*next_type = (priv & 0x30) ? cbd_CA : cbd_User;
break;
default:
/* bail */ /* shouldn't ever happen */
PORT_SetError(SEC_ERROR_UNKNOWN_ISSUER);
return SECFailure;
}
return SECSuccess;
}
static SECStatus
cert_VerifyCertChainOld(CERTCertDBHandle *handle, CERTCertificate *cert,
PRBool checkSig, PRBool* sigerror,
SECCertUsage certUsage, int64 t, void *wincx,
CERTVerifyLog *log, PRBool* revoked)
{
SECTrustType trustType;
CERTBasicConstraints basicConstraint;
CERTCertificate *issuerCert = NULL;
CERTCertificate *subjectCert = NULL;
CERTCertificate *badCert = NULL;
PRBool isca;
PRBool isFortezzaV1 = PR_FALSE;
SECStatus rv;
SECStatus rvFinal = SECSuccess;
int count;
int currentPathLen = 0;
int pathLengthLimit = CERT_UNLIMITED_PATH_CONSTRAINT;
unsigned int caCertType;
unsigned int requiredCAKeyUsage;
unsigned int requiredFlags;
PRArenaPool *arena = NULL;
CERTGeneralName *namesList = NULL;
CERTCertificate **certsList = NULL;
int certsListLen = 16;
int namesCount = 0;
PRBool subjectCertIsSelfIssued;
cbd_FortezzaType last_type = cbd_None;
if (revoked) {
*revoked = PR_FALSE;
}
if (CERT_KeyUsageAndTypeForCertUsage(certUsage, PR_TRUE,
&requiredCAKeyUsage,
&caCertType)
!= SECSuccess ) {
PORT_Assert(0);
EXIT_IF_NOT_LOGGING(log);
requiredCAKeyUsage = 0;
caCertType = 0;
}
switch ( certUsage ) {
case certUsageSSLClient:
case certUsageSSLServer:
case certUsageSSLCA:
case certUsageSSLServerWithStepUp:
case certUsageEmailSigner:
case certUsageEmailRecipient:
case certUsageObjectSigner:
case certUsageVerifyCA:
case certUsageAnyCA:
case certUsageStatusResponder:
if ( CERT_TrustFlagsForCACertUsage(certUsage, &requiredFlags,
&trustType) != SECSuccess ) {
PORT_Assert(0);
EXIT_IF_NOT_LOGGING(log);
requiredFlags = 0;
trustType = trustSSL;
}
break;
default:
PORT_Assert(0);
EXIT_IF_NOT_LOGGING(log);
requiredFlags = 0;
trustType = trustSSL;/* This used to be 0, but we need something
* that matches the enumeration type.
*/
caCertType = 0;
}
subjectCert = CERT_DupCertificate(cert);
if ( subjectCert == NULL ) {
goto loser;
}
/* determine if the cert is fortezza.
*/
isFortezzaV1 = (PRBool)
(CERT_GetCertKeyType(&subjectCert->subjectPublicKeyInfo)
== fortezzaKey);
if (isFortezzaV1) {
rv = cert_VerifyFortezzaV1Cert(handle, subjectCert, &last_type,
cbd_None, t, wincx);
if (rv == SECFailure) {
/**** PORT_SetError is already set by cert_VerifyFortezzaV1Cert **/
LOG_ERROR_OR_EXIT(log,subjectCert,0,0);
}
}
arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
if (arena == NULL) {
goto loser;
}
certsList = PORT_ZNewArray(CERTCertificate *, certsListLen);
if (certsList == NULL)
goto loser;
/* RFC 3280 says that the name constraints will apply to the names
** in the leaf (EE) cert, whether it is self issued or not, so
** we pretend that it is not.
*/
subjectCertIsSelfIssued = PR_FALSE;
for ( count = 0; count < CERT_MAX_CERT_CHAIN; count++ ) {
PRBool validCAOverride = PR_FALSE;
/* Construct a list of names for the current and all previous
* certifcates (except leaf (EE) certs, root CAs, and self-issued
* intermediate CAs) to be verified against the name constraints
* extension of the issuer certificate.
*/
if (subjectCertIsSelfIssued == PR_FALSE) {
CERTGeneralName *subjectNameList;
int subjectNameListLen;
int i;
subjectNameList = CERT_GetCertificateNames(subjectCert, arena);
if (!subjectNameList)
goto loser;
subjectNameListLen = CERT_GetNamesLength(subjectNameList);
if (!subjectNameListLen)
goto loser;
if (certsListLen <= namesCount + subjectNameListLen) {
CERTCertificate **tmpCertsList;
certsListLen = (namesCount + subjectNameListLen) * 2;
tmpCertsList =
(CERTCertificate **)PORT_Realloc(certsList,
certsListLen * sizeof(CERTCertificate *));
if (tmpCertsList == NULL) {
goto loser;
}
certsList = tmpCertsList;
}
for (i = 0; i < subjectNameListLen; i++) {
certsList[namesCount + i] = subjectCert;
}
namesCount += subjectNameListLen;
namesList = cert_CombineNamesLists(namesList, subjectNameList);
}
/* check if the cert has an unsupported critical extension */
if ( subjectCert->options.bits.hasUnsupportedCriticalExt ) {
PORT_SetError(SEC_ERROR_UNKNOWN_CRITICAL_EXTENSION);
LOG_ERROR_OR_EXIT(log,subjectCert,count,0);
}
/* find the certificate of the issuer */
issuerCert = CERT_FindCertIssuer(subjectCert, t, certUsage);
if ( ! issuerCert ) {
PORT_SetError(SEC_ERROR_UNKNOWN_ISSUER);
LOG_ERROR(log,subjectCert,count,0);
goto loser;
}
/* verify the signature on the cert */
if ( checkSig ) {
rv = CERT_VerifySignedData(&subjectCert->signatureWrap,
issuerCert, t, wincx);
if ( rv != SECSuccess ) {
if (sigerror) {
*sigerror = PR_TRUE;
}
if ( PORT_GetError() == SEC_ERROR_EXPIRED_CERTIFICATE ) {
PORT_SetError(SEC_ERROR_EXPIRED_ISSUER_CERTIFICATE);
LOG_ERROR_OR_EXIT(log,issuerCert,count+1,0);
} else {
PORT_SetError(SEC_ERROR_BAD_SIGNATURE);
LOG_ERROR_OR_EXIT(log,subjectCert,count,0);
}
}
}
/*
* XXX - fortezza may need error logging stuff added
*/
if (isFortezzaV1) {
rv = cert_VerifyFortezzaV1Cert(handle, issuerCert, &last_type,
last_type, t, wincx);
if (rv == SECFailure) {
/**** PORT_SetError is already set by *
* cert_VerifyFortezzaV1Cert **/
LOG_ERROR_OR_EXIT(log,subjectCert,0,0);
}
}
/* If the basicConstraint extension is included in an immediate CA
* certificate, make sure that the isCA flag is on. If the
* pathLenConstraint component exists, it must be greater than the
* number of CA certificates we have seen so far. If the extension
* is omitted, we will assume that this is a CA certificate with
* an unlimited pathLenConstraint (since it already passes the
* netscape-cert-type extension checking).
*
* In the fortezza (V1) case, we've already checked the CA bits
* in the key, so we're presumed to be a CA; however we really don't
* want to bypass Basic constraint or netscape extension parsing.
*
* In Fortezza V2, basicConstraint will be set for every CA,PCA,PAA
*/
rv = CERT_FindBasicConstraintExten(issuerCert, &basicConstraint);
if ( rv != SECSuccess ) {
if (PORT_GetError() != SEC_ERROR_EXTENSION_NOT_FOUND) {
LOG_ERROR_OR_EXIT(log,issuerCert,count+1,0);
}
pathLengthLimit = CERT_UNLIMITED_PATH_CONSTRAINT;
/* no basic constraints found, if we're fortezza, CA bit is already
* verified (isca = PR_TRUE). otherwise, we aren't (yet) a ca
* isca = PR_FALSE */
isca = isFortezzaV1;
} else {
if ( basicConstraint.isCA == PR_FALSE ) {
PORT_SetError (SEC_ERROR_CA_CERT_INVALID);
LOG_ERROR_OR_EXIT(log,issuerCert,count+1,0);
}
pathLengthLimit = basicConstraint.pathLenConstraint;
isca = PR_TRUE;
}
/* make sure that the path len constraint is properly set.*/
if (pathLengthLimit >= 0 && currentPathLen > pathLengthLimit) {
PORT_SetError (SEC_ERROR_PATH_LEN_CONSTRAINT_INVALID);
LOG_ERROR_OR_EXIT(log, issuerCert, count+1, pathLengthLimit);
}
/* XXX - the error logging may need to go down into CRL stuff at some
* point
*/
/* check revoked list (issuer) */
rv = SEC_CheckCRL(handle, subjectCert, issuerCert, t, wincx);
if (rv == SECFailure) {
if (revoked) {
*revoked = PR_TRUE;
}
LOG_ERROR_OR_EXIT(log,subjectCert,count,0);
} else if (rv == SECWouldBlock) {
/* We found something fishy, so we intend to issue an
* error to the user, but the user may wish to continue
* processing, in which case we better make sure nothing
* worse has happened... so keep cranking the loop */
rvFinal = SECFailure;
if (revoked) {
*revoked = PR_TRUE;
}
LOG_ERROR(log,subjectCert,count,0);
}
if ( issuerCert->trust ) {
/* we have some trust info, but this does NOT imply that this
* cert is actually trusted for any purpose. The cert may be
* explicitly UNtrusted. We won't know until we examine the
* trust bits.
*/
unsigned int flags;
if (certUsage != certUsageAnyCA &&
certUsage != certUsageStatusResponder) {
/*
* XXX This choice of trustType seems arbitrary.
*/
if ( certUsage == certUsageVerifyCA ) {
if ( subjectCert->nsCertType & NS_CERT_TYPE_EMAIL_CA ) {
trustType = trustEmail;
} else if ( subjectCert->nsCertType & NS_CERT_TYPE_SSL_CA ) {
trustType = trustSSL;
} else {
trustType = trustObjectSigning;
}
}
flags = SEC_GET_TRUST_FLAGS(issuerCert->trust, trustType);
if (( flags & requiredFlags ) == requiredFlags) {
/* we found a trusted one, so return */
rv = rvFinal;
goto done;
}
if (flags & CERTDB_VALID_CA) {
validCAOverride = PR_TRUE;
}
} else {
/* Check if we have any valid trust when cheching for
* certUsageAnyCA or certUsageStatusResponder. */
for (trustType = trustSSL; trustType < trustTypeNone;
trustType++) {
flags = SEC_GET_TRUST_FLAGS(issuerCert->trust, trustType);
if ((flags & requiredFlags) == requiredFlags) {
rv = rvFinal;
goto done;
}
if (flags & CERTDB_VALID_CA)
validCAOverride = PR_TRUE;
}
}
}
if (!validCAOverride) {
/*
* Make sure that if this is an intermediate CA in the chain that
* it was given permission by its signer to be a CA.
*/
/*
* if basicConstraints says it is a ca, then we check the
* nsCertType. If the nsCertType has any CA bits set, then
* it must have the right one.
*/
if (!isca || (issuerCert->nsCertType & NS_CERT_TYPE_CA)) {
isca = (issuerCert->nsCertType & caCertType) ? PR_TRUE : PR_FALSE;
}
if ( !isca ) {
PORT_SetError(SEC_ERROR_CA_CERT_INVALID);
LOG_ERROR_OR_EXIT(log,issuerCert,count+1,0);
}
/* make sure key usage allows cert signing */
if (CERT_CheckKeyUsage(issuerCert, requiredCAKeyUsage) != SECSuccess) {
PORT_SetError(SEC_ERROR_INADEQUATE_KEY_USAGE);
LOG_ERROR_OR_EXIT(log,issuerCert,count+1,requiredCAKeyUsage);
}
}
/* make sure that the entire chain is within the name space of the
** current issuer certificate.
*/
rv = CERT_CompareNameSpace(issuerCert, namesList, certsList,
arena, &badCert);
if (rv != SECSuccess || badCert != NULL) {
PORT_SetError(SEC_ERROR_CERT_NOT_IN_NAME_SPACE);
LOG_ERROR_OR_EXIT(log, badCert, count + 1, 0);
goto loser;
}
/* make sure that the issuer is not self signed. If it is, then
* stop here to prevent looping.
*/
if (issuerCert->isRoot) {
PORT_SetError(SEC_ERROR_UNTRUSTED_ISSUER);
LOG_ERROR(log, issuerCert, count+1, 0);
goto loser;
}
/* The issuer cert will be the subject cert in the next loop.
* A cert is self-issued if its subject and issuer are equal and
* both are of non-zero length.
*/
subjectCertIsSelfIssued = (PRBool)
SECITEM_ItemsAreEqual(&issuerCert->derIssuer,
&issuerCert->derSubject) &&
issuerCert->derSubject.len > 0;
if (subjectCertIsSelfIssued == PR_FALSE) {
/* RFC 3280 says only non-self-issued intermediate CA certs
* count in path length.
*/
++currentPathLen;
}
CERT_DestroyCertificate(subjectCert);
subjectCert = issuerCert;
issuerCert = NULL;
}
PORT_SetError(SEC_ERROR_UNKNOWN_ISSUER);
LOG_ERROR(log,subjectCert,count,0);
loser:
rv = SECFailure;
done:
if (certsList != NULL) {
PORT_Free(certsList);
}
if ( issuerCert ) {
CERT_DestroyCertificate(issuerCert);
}
if ( subjectCert ) {
CERT_DestroyCertificate(subjectCert);
}
if ( arena != NULL ) {
PORT_FreeArena(arena, PR_FALSE);
}
return rv;
}
SECStatus
cert_VerifyCertChain(CERTCertDBHandle *handle, CERTCertificate *cert,
PRBool checkSig, PRBool* sigerror,
SECCertUsage certUsage, int64 t, void *wincx,
CERTVerifyLog *log, PRBool* revoked)
{
if (CERT_GetUsePKIXForValidation()) {
return cert_VerifyCertChainPkix(cert, checkSig, certUsage, t,
wincx, log, sigerror, revoked);
}
return cert_VerifyCertChainOld(handle, cert, checkSig, sigerror,
certUsage, t, wincx, log, revoked);
}
SECStatus
CERT_VerifyCertChain(CERTCertDBHandle *handle, CERTCertificate *cert,
PRBool checkSig, SECCertUsage certUsage, int64 t,
void *wincx, CERTVerifyLog *log)
{
return cert_VerifyCertChain(handle, cert, checkSig, NULL, certUsage, t,
wincx, log, NULL);
}
/*
* verify that a CA can sign a certificate with the requested usage.
*/
SECStatus
CERT_VerifyCACertForUsage(CERTCertDBHandle *handle, CERTCertificate *cert,
PRBool checkSig, SECCertUsage certUsage, int64 t,
void *wincx, CERTVerifyLog *log)
{
SECTrustType trustType;
CERTBasicConstraints basicConstraint;
PRBool isca;
PRBool validCAOverride = PR_FALSE;
SECStatus rv;
SECStatus rvFinal = SECSuccess;
int flags;
unsigned int caCertType;
unsigned int requiredCAKeyUsage;
unsigned int requiredFlags;
CERTCertificate *issuerCert;
if (CERT_KeyUsageAndTypeForCertUsage(certUsage, PR_TRUE,
&requiredCAKeyUsage,
&caCertType) != SECSuccess ) {
PORT_Assert(0);
EXIT_IF_NOT_LOGGING(log);
requiredCAKeyUsage = 0;
caCertType = 0;
}
switch ( certUsage ) {
case certUsageSSLClient:
case certUsageSSLServer:
case certUsageSSLCA:
case certUsageSSLServerWithStepUp:
case certUsageEmailSigner:
case certUsageEmailRecipient:
case certUsageObjectSigner:
case certUsageVerifyCA:
case certUsageStatusResponder:
if ( CERT_TrustFlagsForCACertUsage(certUsage, &requiredFlags,
&trustType) != SECSuccess ) {
PORT_Assert(0);
EXIT_IF_NOT_LOGGING(log);
requiredFlags = 0;
trustType = trustSSL;
}
break;
default:
PORT_Assert(0);
EXIT_IF_NOT_LOGGING(log);
requiredFlags = 0;
trustType = trustSSL;/* This used to be 0, but we need something
* that matches the enumeration type.
*/
caCertType = 0;
}
/* If the basicConstraint extension is included in an intermmediate CA
* certificate, make sure that the isCA flag is on. If the
* pathLenConstraint component exists, it must be greater than the
* number of CA certificates we have seen so far. If the extension
* is omitted, we will assume that this is a CA certificate with
* an unlimited pathLenConstraint (since it already passes the
* netscape-cert-type extension checking).
*
* In the fortezza (V1) case, we've already checked the CA bits
* in the key, so we're presumed to be a CA; however we really don't
* want to bypass Basic constraint or netscape extension parsing.
*
* In Fortezza V2, basicConstraint will be set for every CA,PCA,PAA
*/
rv = CERT_FindBasicConstraintExten(cert, &basicConstraint);
if ( rv != SECSuccess ) {
if (PORT_GetError() != SEC_ERROR_EXTENSION_NOT_FOUND) {
LOG_ERROR_OR_EXIT(log,cert,0,0);
}
/* no basic constraints found, if we're fortezza, CA bit is already
* verified (isca = PR_TRUE). otherwise, we aren't (yet) a ca
* isca = PR_FALSE */
isca = PR_FALSE;
} else {
if ( basicConstraint.isCA == PR_FALSE ) {
PORT_SetError (SEC_ERROR_CA_CERT_INVALID);
LOG_ERROR_OR_EXIT(log,cert,0,0);
}
/* can't check path length if we don't know the previous path */
isca = PR_TRUE;
}
if ( cert->trust ) {
/* we have some trust info, but this does NOT imply that this
* cert is actually trusted for any purpose. The cert may be
* explicitly UNtrusted. We won't know until we examine the
* trust bits.
*/
if (certUsage == certUsageStatusResponder) {
/* Check the special case of certUsageStatusResponder */
issuerCert = CERT_FindCertIssuer(cert, t, certUsage);
if (issuerCert) {
if (SEC_CheckCRL(handle, cert, issuerCert, t, wincx)
!= SECSuccess) {
PORT_SetError(SEC_ERROR_REVOKED_CERTIFICATE);
CERT_DestroyCertificate(issuerCert);
goto loser;
}
CERT_DestroyCertificate(issuerCert);
}
/* XXX We have NOT determined that this cert is trusted.
* For years, NSS has treated this as trusted,
* but it seems incorrect.
*/
rv = rvFinal;
goto done;
}
/*
* check the trust parms of the issuer
*/
flags = SEC_GET_TRUST_FLAGS(cert->trust, trustType);
if ( ( flags & requiredFlags ) == requiredFlags) {
/* we found a trusted one, so return */
rv = rvFinal;
goto done;
}
if (flags & CERTDB_VALID_CA) {
validCAOverride = PR_TRUE;
}
}
if (!validCAOverride) {
/*
* Make sure that if this is an intermediate CA in the chain that
* it was given permission by its signer to be a CA.
*/
/*
* if basicConstraints says it is a ca, then we check the
* nsCertType. If the nsCertType has any CA bits set, then
* it must have the right one.
*/
if (!isca || (cert->nsCertType & NS_CERT_TYPE_CA)) {
isca = (cert->nsCertType & caCertType) ? PR_TRUE : PR_FALSE;
}
if (!isca) {
PORT_SetError(SEC_ERROR_CA_CERT_INVALID);
LOG_ERROR_OR_EXIT(log,cert,0,0);
}
/* make sure key usage allows cert signing */
if (CERT_CheckKeyUsage(cert, requiredCAKeyUsage) != SECSuccess) {
PORT_SetError(SEC_ERROR_INADEQUATE_KEY_USAGE);
LOG_ERROR_OR_EXIT(log,cert,0,requiredCAKeyUsage);
}
}
/* make sure that the issuer is not self signed. If it is, then
* stop here to prevent looping.
*/
if (cert->isRoot) {
PORT_SetError(SEC_ERROR_UNTRUSTED_ISSUER);
LOG_ERROR(log, cert, 0, 0);
goto loser;
}
return CERT_VerifyCertChain(handle, cert, checkSig, certUsage, t,
wincx, log);
loser:
rv = SECFailure;
done:
return rv;
}
#define NEXT_USAGE() { \
i*=2; \
certUsage++; \
continue; \
}
#define VALID_USAGE() { \
NEXT_USAGE(); \
}
#define INVALID_USAGE() { \
if (returnedUsages) { \
*returnedUsages &= (~i); \
} \
if (PR_TRUE == requiredUsage) { \
valid = SECFailure; \
} \
NEXT_USAGE(); \
}
/*
* verify a certificate by checking if it's valid and that we
* trust the issuer.
*
* certificateUsage contains a bitfield of all cert usages that are
* required for verification to succeed
*
* a bitfield of cert usages is returned in *returnedUsages
* if requiredUsages is non-zero, the returned bitmap is only
* for those required usages, otherwise it is for all usages
*
*/
SECStatus
CERT_VerifyCertificate(CERTCertDBHandle *handle, CERTCertificate *cert,
PRBool checkSig, SECCertificateUsage requiredUsages, int64 t,
void *wincx, CERTVerifyLog *log, SECCertificateUsage* returnedUsages)
{
SECStatus rv;
SECStatus valid;
unsigned int requiredKeyUsage;
unsigned int requiredCertType;
unsigned int flags;
unsigned int certType;
PRBool allowOverride;
SECCertTimeValidity validity;
CERTStatusConfig *statusConfig;
PRInt32 i;
SECCertUsage certUsage = 0;
PRBool checkedOCSP = PR_FALSE;
PRBool checkAllUsages = PR_FALSE;
PRBool revoked = PR_FALSE;
PRBool sigerror = PR_FALSE;
if (!requiredUsages) {
/* there are no required usages, so the user probably wants to
get status for all usages */
checkAllUsages = PR_TRUE;
}
if (returnedUsages) {
*returnedUsages = 0;
} else {
/* we don't have a place to return status for all usages,
so we can skip checks for usages that aren't required */
checkAllUsages = PR_FALSE;
}
valid = SECSuccess ; /* start off assuming cert is valid */
/* make sure that the cert is valid at time t */
allowOverride = (PRBool)((requiredUsages & certificateUsageSSLServer) ||
(requiredUsages & certificateUsageSSLServerWithStepUp));
validity = CERT_CheckCertValidTimes(cert, t, allowOverride);
if ( validity != secCertTimeValid ) {
valid = SECFailure;
LOG_ERROR_OR_EXIT(log,cert,0,validity);
}
/* check key usage and netscape cert type */
cert_GetCertType(cert);
certType = cert->nsCertType;
for (i=1; i<=certificateUsageHighest &&
(SECSuccess == valid || returnedUsages || log) ; ) {
PRBool requiredUsage = (i & requiredUsages) ? PR_TRUE : PR_FALSE;
if (PR_FALSE == requiredUsage && PR_FALSE == checkAllUsages) {
NEXT_USAGE();
}
if (returnedUsages) {
*returnedUsages |= i; /* start off assuming this usage is valid */
}
switch ( certUsage ) {
case certUsageSSLClient:
case certUsageSSLServer:
case certUsageSSLServerWithStepUp:
case certUsageSSLCA:
case certUsageEmailSigner:
case certUsageEmailRecipient:
case certUsageObjectSigner:
case certUsageStatusResponder:
rv = CERT_KeyUsageAndTypeForCertUsage(certUsage, PR_FALSE,
&requiredKeyUsage,
&requiredCertType);
if ( rv != SECSuccess ) {
PORT_Assert(0);
/* EXIT_IF_NOT_LOGGING(log); XXX ??? */
requiredKeyUsage = 0;
requiredCertType = 0;
INVALID_USAGE();
}
break;
case certUsageAnyCA:
case certUsageProtectedObjectSigner:
case certUsageUserCertImport:
case certUsageVerifyCA:
/* these usages cannot be verified */
NEXT_USAGE();
default:
PORT_Assert(0);
requiredKeyUsage = 0;
requiredCertType = 0;
INVALID_USAGE();
}
if ( CERT_CheckKeyUsage(cert, requiredKeyUsage) != SECSuccess ) {
if (PR_TRUE == requiredUsage) {
PORT_SetError(SEC_ERROR_INADEQUATE_KEY_USAGE);
}
LOG_ERROR(log,cert,0,requiredKeyUsage);
INVALID_USAGE();
}
if ( !( certType & requiredCertType ) ) {
if (PR_TRUE == requiredUsage) {
PORT_SetError(SEC_ERROR_INADEQUATE_CERT_TYPE);
}
LOG_ERROR(log,cert,0,requiredCertType);
INVALID_USAGE();
}
/* check trust flags to see if this cert is directly trusted */
if ( cert->trust ) { /* the cert is in the DB */
switch ( certUsage ) {
case certUsageSSLClient:
case certUsageSSLServer:
flags = cert->trust->sslFlags;
/* is the cert directly trusted or not trusted ? */
if ( flags & CERTDB_VALID_PEER ) {/*the trust record is valid*/
if ( flags & CERTDB_TRUSTED ) { /* trust this cert */
VALID_USAGE();
} else { /* don't trust this cert */
if (PR_TRUE == requiredUsage) {
PORT_SetError(SEC_ERROR_UNTRUSTED_CERT);
}
LOG_ERROR(log,cert,0,flags);
INVALID_USAGE();
}
}
break;
case certUsageSSLServerWithStepUp:
/* XXX - step up certs can't be directly trusted */
break;
case certUsageSSLCA:
break;
case certUsageEmailSigner:
case certUsageEmailRecipient:
flags = cert->trust->emailFlags;
/* is the cert directly trusted or not trusted ? */
if ( ( flags & ( CERTDB_VALID_PEER | CERTDB_TRUSTED ) ) ==
( CERTDB_VALID_PEER | CERTDB_TRUSTED ) ) {
VALID_USAGE();
}
break;
case certUsageObjectSigner:
flags = cert->trust->objectSigningFlags;
/* is the cert directly trusted or not trusted ? */
if ( flags & CERTDB_VALID_PEER ) {/*the trust record is valid*/
if ( flags & CERTDB_TRUSTED ) { /* trust this cert */
VALID_USAGE();
} else { /* don't trust this cert */
if (PR_TRUE == requiredUsage) {
PORT_SetError(SEC_ERROR_UNTRUSTED_CERT);
}
LOG_ERROR(log,cert,0,flags);
INVALID_USAGE();
}
}
break;
case certUsageVerifyCA:
case certUsageStatusResponder:
flags = cert->trust->sslFlags;
/* is the cert directly trusted or not trusted ? */
if ( ( flags & ( CERTDB_VALID_CA | CERTDB_TRUSTED_CA ) ) ==
( CERTDB_VALID_CA | CERTDB_TRUSTED_CA ) ) {
VALID_USAGE();
}
flags = cert->trust->emailFlags;
/* is the cert directly trusted or not trusted ? */
if ( ( flags & ( CERTDB_VALID_CA | CERTDB_TRUSTED_CA ) ) ==
( CERTDB_VALID_CA | CERTDB_TRUSTED_CA ) ) {
VALID_USAGE();
}
flags = cert->trust->objectSigningFlags;
/* is the cert directly trusted or not trusted ? */
if ( ( flags & ( CERTDB_VALID_CA | CERTDB_TRUSTED_CA ) ) ==
( CERTDB_VALID_CA | CERTDB_TRUSTED_CA ) ) {
VALID_USAGE();
}
break;
case certUsageAnyCA:
case certUsageProtectedObjectSigner:
case certUsageUserCertImport:
/* XXX to make the compiler happy. Should these be
* explicitly handled?
*/
break;
}
}
if (PR_TRUE == revoked || PR_TRUE == sigerror) {
INVALID_USAGE();
}
rv = cert_VerifyCertChain(handle, cert,
checkSig, &sigerror,
certUsage, t, wincx, log,
&revoked);
if (rv != SECSuccess) {
/* EXIT_IF_NOT_LOGGING(log); XXX ???? */
INVALID_USAGE();
}
/*
* Check OCSP revocation status, but only if the cert we are checking
* is not a status reponder itself. We only do this in the case
* where we checked the cert chain (above); explicit trust "wins"
* (avoids status checking, just as it avoids CRL checking) by
* bypassing this code.
*/
if (PR_FALSE == checkedOCSP) {
checkedOCSP = PR_TRUE; /* only check OCSP once */
statusConfig = CERT_GetStatusConfig(handle);
if (requiredUsages != certificateUsageStatusResponder &&
statusConfig != NULL) {
if (statusConfig->statusChecker != NULL) {
rv = (* statusConfig->statusChecker)(handle, cert,
t, wincx);
if (rv != SECSuccess) {
LOG_ERROR(log,cert,0,0);
revoked = PR_TRUE;
INVALID_USAGE();
}
}
}
}
NEXT_USAGE();
}
loser:
return(valid);
}
SECStatus
CERT_VerifyCert(CERTCertDBHandle *handle, CERTCertificate *cert,
PRBool checkSig, SECCertUsage certUsage, int64 t,
void *wincx, CERTVerifyLog *log)
{
SECStatus rv;
unsigned int requiredKeyUsage;
unsigned int requiredCertType;
unsigned int flags;
unsigned int certType;
PRBool allowOverride;
SECCertTimeValidity validity;
CERTStatusConfig *statusConfig;
#ifdef notdef
/* check if this cert is in the Evil list */
rv = CERT_CheckForEvilCert(cert);
if ( rv != SECSuccess ) {
PORT_SetError(SEC_ERROR_REVOKED_CERTIFICATE);
LOG_ERROR_OR_EXIT(log,cert,0,0);
}
#endif
/* make sure that the cert is valid at time t */
allowOverride = (PRBool)((certUsage == certUsageSSLServer) ||
(certUsage == certUsageSSLServerWithStepUp));
validity = CERT_CheckCertValidTimes(cert, t, allowOverride);
if ( validity != secCertTimeValid ) {
LOG_ERROR_OR_EXIT(log,cert,0,validity);
}
/* check key usage and netscape cert type */
cert_GetCertType(cert);
certType = cert->nsCertType;
switch ( certUsage ) {
case certUsageSSLClient:
case certUsageSSLServer:
case certUsageSSLServerWithStepUp:
case certUsageSSLCA:
case certUsageEmailSigner:
case certUsageEmailRecipient:
case certUsageObjectSigner:
case certUsageStatusResponder:
rv = CERT_KeyUsageAndTypeForCertUsage(certUsage, PR_FALSE,
&requiredKeyUsage,
&requiredCertType);
if ( rv != SECSuccess ) {
PORT_Assert(0);
EXIT_IF_NOT_LOGGING(log);
requiredKeyUsage = 0;
requiredCertType = 0;
}
break;
case certUsageVerifyCA:
case certUsageAnyCA:
requiredKeyUsage = KU_KEY_CERT_SIGN;
requiredCertType = NS_CERT_TYPE_CA;
if ( ! ( certType & NS_CERT_TYPE_CA ) ) {
certType |= NS_CERT_TYPE_CA;
}
break;
default:
PORT_Assert(0);
EXIT_IF_NOT_LOGGING(log);
requiredKeyUsage = 0;
requiredCertType = 0;
}
if ( CERT_CheckKeyUsage(cert, requiredKeyUsage) != SECSuccess ) {
PORT_SetError(SEC_ERROR_INADEQUATE_KEY_USAGE);
LOG_ERROR_OR_EXIT(log,cert,0,requiredKeyUsage);
}
if ( !( certType & requiredCertType ) ) {
PORT_SetError(SEC_ERROR_INADEQUATE_CERT_TYPE);
LOG_ERROR_OR_EXIT(log,cert,0,requiredCertType);
}
/* check trust flags to see if this cert is directly trusted */
if ( cert->trust ) { /* the cert is in the DB */
switch ( certUsage ) {
case certUsageSSLClient:
case certUsageSSLServer:
flags = cert->trust->sslFlags;
/* is the cert directly trusted or not trusted ? */
if ( flags & CERTDB_VALID_PEER ) {/*the trust record is valid*/
if ( flags & CERTDB_TRUSTED ) { /* trust this cert */
goto winner;
} else { /* don't trust this cert */
PORT_SetError(SEC_ERROR_UNTRUSTED_CERT);
LOG_ERROR_OR_EXIT(log,cert,0,flags);
}
}
break;
case certUsageSSLServerWithStepUp:
/* XXX - step up certs can't be directly trusted */
break;
case certUsageSSLCA:
break;
case certUsageEmailSigner:
case certUsageEmailRecipient:
flags = cert->trust->emailFlags;
/* is the cert directly trusted or not trusted ? */
if ( ( flags & ( CERTDB_VALID_PEER | CERTDB_TRUSTED ) ) ==
( CERTDB_VALID_PEER | CERTDB_TRUSTED ) ) {
goto winner;
}
break;
case certUsageObjectSigner:
flags = cert->trust->objectSigningFlags;
/* is the cert directly trusted or not trusted ? */
if ( flags & CERTDB_VALID_PEER ) {/*the trust record is valid*/
if ( flags & CERTDB_TRUSTED ) { /* trust this cert */
goto winner;
} else { /* don't trust this cert */
PORT_SetError(SEC_ERROR_UNTRUSTED_CERT);
LOG_ERROR_OR_EXIT(log,cert,0,flags);
}
}
break;
case certUsageVerifyCA:
case certUsageStatusResponder:
flags = cert->trust->sslFlags;
/* is the cert directly trusted or not trusted ? */
if ( ( flags & ( CERTDB_VALID_CA | CERTDB_TRUSTED_CA ) ) ==
( CERTDB_VALID_CA | CERTDB_TRUSTED_CA ) ) {
goto winner;
}
flags = cert->trust->emailFlags;
/* is the cert directly trusted or not trusted ? */
if ( ( flags & ( CERTDB_VALID_CA | CERTDB_TRUSTED_CA ) ) ==
( CERTDB_VALID_CA | CERTDB_TRUSTED_CA ) ) {
goto winner;
}
flags = cert->trust->objectSigningFlags;
/* is the cert directly trusted or not trusted ? */
if ( ( flags & ( CERTDB_VALID_CA | CERTDB_TRUSTED_CA ) ) ==
( CERTDB_VALID_CA | CERTDB_TRUSTED_CA ) ) {
goto winner;
}
break;
case certUsageAnyCA:
case certUsageProtectedObjectSigner:
case certUsageUserCertImport:
/* XXX to make the compiler happy. Should these be
* explicitly handled?
*/
break;
}
}
rv = CERT_VerifyCertChain(handle, cert, checkSig, certUsage,
t, wincx, log);
if (rv != SECSuccess) {
EXIT_IF_NOT_LOGGING(log);
}
/*
* Check revocation status, but only if the cert we are checking
* is not a status reponder itself. We only do this in the case
* where we checked the cert chain (above); explicit trust "wins"
* (avoids status checking, just as it avoids CRL checking, which
* is all done inside VerifyCertChain) by bypassing this code.
*/
statusConfig = CERT_GetStatusConfig(handle);
if (certUsage != certUsageStatusResponder && statusConfig != NULL) {
if (statusConfig->statusChecker != NULL) {
rv = (* statusConfig->statusChecker)(handle, cert,
t, wincx);
if (rv != SECSuccess) {
LOG_ERROR_OR_EXIT(log,cert,0,0);
}
}
}
winner:
return(SECSuccess);
loser:
rv = SECFailure;
return(rv);
}
/*
* verify a certificate by checking if its valid and that we
* trust the issuer. Verify time against now.
*/
SECStatus
CERT_VerifyCertificateNow(CERTCertDBHandle *handle, CERTCertificate *cert,
PRBool checkSig, SECCertificateUsage requiredUsages,
void *wincx, SECCertificateUsage* returnedUsages)
{
return(CERT_VerifyCertificate(handle, cert, checkSig,
requiredUsages, PR_Now(), wincx, NULL, returnedUsages));
}
/* obsolete, do not use for new code */
SECStatus
CERT_VerifyCertNow(CERTCertDBHandle *handle, CERTCertificate *cert,
PRBool checkSig, SECCertUsage certUsage, void *wincx)
{
return(CERT_VerifyCert(handle, cert, checkSig,
certUsage, PR_Now(), wincx, NULL));
}
/* [ FROM pcertdb.c ] */
/*
* Supported usage values and types:
* certUsageSSLClient
* certUsageSSLServer
* certUsageSSLServerWithStepUp
* certUsageEmailSigner
* certUsageEmailRecipient
* certUsageObjectSigner
*/
CERTCertificate *
CERT_FindMatchingCert(CERTCertDBHandle *handle, SECItem *derName,
CERTCertOwner owner, SECCertUsage usage,
PRBool preferTrusted, int64 validTime, PRBool validOnly)
{
CERTCertList *certList = NULL;
CERTCertificate *cert = NULL;
unsigned int requiredTrustFlags;
SECTrustType requiredTrustType;
unsigned int flags;
PRBool lookingForCA = PR_FALSE;
SECStatus rv;
CERTCertListNode *node;
CERTCertificate *saveUntrustedCA = NULL;
/* if preferTrusted is set, must be a CA cert */
PORT_Assert( ! ( preferTrusted && ( owner != certOwnerCA ) ) );
if ( owner == certOwnerCA ) {
lookingForCA = PR_TRUE;
if ( preferTrusted ) {
rv = CERT_TrustFlagsForCACertUsage(usage, &requiredTrustFlags,
&requiredTrustType);
if ( rv != SECSuccess ) {
goto loser;
}
requiredTrustFlags |= CERTDB_VALID_CA;
}
}
certList = CERT_CreateSubjectCertList(NULL, handle, derName, validTime,
validOnly);
if ( certList != NULL ) {
rv = CERT_FilterCertListByUsage(certList, usage, lookingForCA);
if ( rv != SECSuccess ) {
goto loser;
}
node = CERT_LIST_HEAD(certList);
while ( !CERT_LIST_END(node, certList) ) {
cert = node->cert;
/* looking for a trusted CA cert */
if ( ( owner == certOwnerCA ) && preferTrusted &&
( requiredTrustType != trustTypeNone ) ) {
if ( cert->trust == NULL ) {
flags = 0;
} else {
flags = SEC_GET_TRUST_FLAGS(cert->trust, requiredTrustType);
}
if ( ( flags & requiredTrustFlags ) != requiredTrustFlags ) {
/* cert is not trusted */
/* if this is the first cert to get this far, then save
* it, so we can use it if we can't find a trusted one
*/
if ( saveUntrustedCA == NULL ) {
saveUntrustedCA = cert;
}
goto endloop;
}
}
/* if we got this far, then this cert meets all criteria */
break;
endloop:
node = CERT_LIST_NEXT(node);
cert = NULL;
}
/* use the saved one if we have it */
if ( cert == NULL ) {
cert = saveUntrustedCA;
}
/* if we found one then bump the ref count before freeing the list */
if ( cert != NULL ) {
/* bump the ref count */
cert = CERT_DupCertificate(cert);
}
CERT_DestroyCertList(certList);
}
return(cert);
loser:
if ( certList != NULL ) {
CERT_DestroyCertList(certList);
}
return(NULL);
}
/* [ From certdb.c ] */
/*
* Filter a list of certificates, removing those certs that do not have
* one of the named CA certs somewhere in their cert chain.
*
* "certList" - the list of certificates to filter
* "nCANames" - number of CA names
* "caNames" - array of CA names in string(rfc 1485) form
* "usage" - what use the certs are for, this is used when
* selecting CA certs
*/
SECStatus
CERT_FilterCertListByCANames(CERTCertList *certList, int nCANames,
char **caNames, SECCertUsage usage)
{
CERTCertificate *issuerCert = NULL;
CERTCertificate *subjectCert;
CERTCertListNode *node, *freenode;
CERTCertificate *cert;
int n;
char **names;
PRBool found;
int64 time;
if ( nCANames <= 0 ) {
return(SECSuccess);
}
time = PR_Now();
node = CERT_LIST_HEAD(certList);
while ( ! CERT_LIST_END(node, certList) ) {
cert = node->cert;
subjectCert = CERT_DupCertificate(cert);
/* traverse the CA certs for this cert */
found = PR_FALSE;
while ( subjectCert != NULL ) {
n = nCANames;
names = caNames;
if (subjectCert->issuerName != NULL) {
while ( n > 0 ) {
if ( PORT_Strcmp(*names, subjectCert->issuerName) == 0 ) {
found = PR_TRUE;
break;
}
n--;
names++;
}
}
if ( found ) {
break;
}
issuerCert = CERT_FindCertIssuer(subjectCert, time, usage);
if ( issuerCert == subjectCert ) {
CERT_DestroyCertificate(issuerCert);
issuerCert = NULL;
break;
}
CERT_DestroyCertificate(subjectCert);
subjectCert = issuerCert;
}
CERT_DestroyCertificate(subjectCert);
if ( !found ) {
/* CA was not found, so remove this cert from the list */
freenode = node;
node = CERT_LIST_NEXT(node);
CERT_RemoveCertListNode(freenode);
} else {
/* CA was found, so leave it in the list */
node = CERT_LIST_NEXT(node);
}
}
return(SECSuccess);
}
/*
* Given a certificate, return a string containing the nickname, and possibly
* one of the validity strings, based on the current validity state of the
* certificate.
*
* "arena" - arena to allocate returned string from. If NULL, then heap
* is used.
* "cert" - the cert to get nickname from
* "expiredString" - the string to append to the nickname if the cert is
* expired.
* "notYetGoodString" - the string to append to the nickname if the cert is
* not yet good.
*/
char *
CERT_GetCertNicknameWithValidity(PRArenaPool *arena, CERTCertificate *cert,
char *expiredString, char *notYetGoodString)
{
SECCertTimeValidity validity;
char *nickname = NULL, *tmpstr = NULL;
validity = CERT_CheckCertValidTimes(cert, PR_Now(), PR_FALSE);
/* if the cert is good, then just use the nickname directly */
if ( validity == secCertTimeValid ) {
if ( arena == NULL ) {
nickname = PORT_Strdup(cert->nickname);
} else {
nickname = PORT_ArenaStrdup(arena, cert->nickname);
}
if ( nickname == NULL ) {
goto loser;
}
} else {
/* if the cert is not valid, then tack one of the strings on the
* end
*/
if ( validity == secCertTimeExpired ) {
tmpstr = PR_smprintf("%s%s", cert->nickname,
expiredString);
} else if ( validity == secCertTimeNotValidYet ) {
/* not yet valid */
tmpstr = PR_smprintf("%s%s", cert->nickname,
notYetGoodString);
} else {
/* undetermined */
tmpstr = PR_smprintf("%s",
"(NULL) (Validity Unknown)");
}
if ( tmpstr == NULL ) {
goto loser;
}
if ( arena ) {
/* copy the string into the arena and free the malloc'd one */
nickname = PORT_ArenaStrdup(arena, tmpstr);
PORT_Free(tmpstr);
} else {
nickname = tmpstr;
}
if ( nickname == NULL ) {
goto loser;
}
}
return(nickname);
loser:
return(NULL);
}
/*
* Collect the nicknames from all certs in a CertList. If the cert is not
* valid, append a string to that nickname.
*
* "certList" - the list of certificates
* "expiredString" - the string to append to the nickname of any expired cert
* "notYetGoodString" - the string to append to the nickname of any cert
* that is not yet valid
*/
CERTCertNicknames *
CERT_NicknameStringsFromCertList(CERTCertList *certList, char *expiredString,
char *notYetGoodString)
{
CERTCertNicknames *names;
PRArenaPool *arena;
CERTCertListNode *node;
char **nn;
/* allocate an arena */
arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
if ( arena == NULL ) {
return(NULL);
}
/* allocate the structure */
names = PORT_ArenaAlloc(arena, sizeof(CERTCertNicknames));
if ( names == NULL ) {
goto loser;
}
/* init the structure */
names->arena = arena;
names->head = NULL;
names->numnicknames = 0;
names->nicknames = NULL;
names->totallen = 0;
/* count the certs in the list */
node = CERT_LIST_HEAD(certList);
while ( ! CERT_LIST_END(node, certList) ) {
names->numnicknames++;
node = CERT_LIST_NEXT(node);
}
/* allocate nicknames array */
names->nicknames = PORT_ArenaAlloc(arena,
sizeof(char *) * names->numnicknames);
if ( names->nicknames == NULL ) {
goto loser;
}
/* just in case printf can't deal with null strings */
if (expiredString == NULL ) {
expiredString = "";
}
if ( notYetGoodString == NULL ) {
notYetGoodString = "";
}
/* traverse the list of certs and collect the nicknames */
nn = names->nicknames;
node = CERT_LIST_HEAD(certList);
while ( ! CERT_LIST_END(node, certList) ) {
*nn = CERT_GetCertNicknameWithValidity(arena, node->cert,
expiredString,
notYetGoodString);
if ( *nn == NULL ) {
goto loser;
}
names->totallen += PORT_Strlen(*nn);
nn++;
node = CERT_LIST_NEXT(node);
}
return(names);
loser:
PORT_FreeArena(arena, PR_FALSE);
return(NULL);
}
/*
* Extract the nickname from a nickmake string that may have either
* expiredString or notYetGoodString appended.
*
* Args:
* "namestring" - the string containing the nickname, and possibly
* one of the validity label strings
* "expiredString" - the expired validity label string
* "notYetGoodString" - the not yet good validity label string
*
* Returns the raw nickname
*/
char *
CERT_ExtractNicknameString(char *namestring, char *expiredString,
char *notYetGoodString)
{
int explen, nyglen, namelen;
int retlen;
char *retstr;
namelen = PORT_Strlen(namestring);
explen = PORT_Strlen(expiredString);
nyglen = PORT_Strlen(notYetGoodString);
if ( namelen > explen ) {
if ( PORT_Strcmp(expiredString, &namestring[namelen-explen]) == 0 ) {
retlen = namelen - explen;
retstr = (char *)PORT_Alloc(retlen+1);
if ( retstr == NULL ) {
goto loser;
}
PORT_Memcpy(retstr, namestring, retlen);
retstr[retlen] = '\0';
goto done;
}
}
if ( namelen > nyglen ) {
if ( PORT_Strcmp(notYetGoodString, &namestring[namelen-nyglen]) == 0) {
retlen = namelen - nyglen;
retstr = (char *)PORT_Alloc(retlen+1);
if ( retstr == NULL ) {
goto loser;
}
PORT_Memcpy(retstr, namestring, retlen);
retstr[retlen] = '\0';
goto done;
}
}
/* if name string is shorter than either invalid string, then it must
* be a raw nickname
*/
retstr = PORT_Strdup(namestring);
done:
return(retstr);
loser:
return(NULL);
}
CERTCertList *
CERT_GetCertChainFromCert(CERTCertificate *cert, int64 time, SECCertUsage usage)
{
CERTCertList *chain = NULL;
int count = 0;
if (NULL == cert) {
return NULL;
}
cert = CERT_DupCertificate(cert);
if (NULL == cert) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
return NULL;
}
chain = CERT_NewCertList();
if (NULL == chain) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
return NULL;
}
while (cert != NULL && ++count <= CERT_MAX_CERT_CHAIN) {
if (SECSuccess != CERT_AddCertToListTail(chain, cert)) {
/* return partial chain */
PORT_SetError(SEC_ERROR_NO_MEMORY);
return chain;
}
if (cert->isRoot) {
/* return complete chain */
return chain;
}
cert = CERT_FindCertIssuer(cert, time, usage);
}
/* return partial chain */
PORT_SetError(SEC_ERROR_UNKNOWN_ISSUER);
return chain;
}
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