/*
* get the value of the X.509 v3 Key Usage Extension
*/
SECStatus
CERT_FindSubjectKeyIDExtension(CERTCertificate *cert, SECItem *retItem)
{
SECStatus rv;
SECItem encodedValue = {siBuffer, NULL, 0 };
SECItem decodedValue = {siBuffer, NULL, 0 };
rv = cert_FindExtension
(cert->extensions, SEC_OID_X509_SUBJECT_KEY_ID, &encodedValue);
if (rv == SECSuccess) {
PLArenaPool * tmpArena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
if (tmpArena) {
rv = SEC_QuickDERDecodeItem(tmpArena, &decodedValue,
SEC_ASN1_GET(SEC_OctetStringTemplate),
&encodedValue);
if (rv == SECSuccess) {
rv = SECITEM_CopyItem(NULL, retItem, &decodedValue);
}
PORT_FreeArena(tmpArena, PR_FALSE);
} else {
rv = SECFailure;
}
}
SECITEM_FreeItem(&encodedValue, PR_FALSE);
return rv;
}
SECStatus CERT_FindCRLNumberExten (PRArenaPool *arena, CERTCrl *crl,
SECItem *value)
{
SECItem encodedExtenValue;
SECItem *tmpItem = NULL;
SECStatus rv;
void *mark = NULL;
encodedExtenValue.data = NULL;
encodedExtenValue.len = 0;
rv = cert_FindExtension(crl->extensions, SEC_OID_X509_CRL_NUMBER,
&encodedExtenValue);
if ( rv != SECSuccess )
return (rv);
mark = PORT_ArenaMark(arena);
tmpItem = SECITEM_ArenaDupItem(arena, &encodedExtenValue);
if (tmpItem) {
rv = SEC_QuickDERDecodeItem (arena, value,
SEC_ASN1_GET(SEC_IntegerTemplate),
tmpItem);
} else {
rv = SECFailure;
}
PORT_Free (encodedExtenValue.data);
if (rv == SECFailure) {
PORT_ArenaRelease(arena, mark);
} else {
PORT_ArenaUnmark(arena, mark);
}
return (rv);
}
/*
* get the value of a string type extension
*/
char *
CERT_FindNSStringExtension(CERTCertificate *cert, int oidtag)
{
SECItem wrapperItem, tmpItem = {siBuffer,0};
SECStatus rv;
PLArenaPool *arena = NULL;
char *retstring = NULL;
wrapperItem.data = NULL;
tmpItem.data = NULL;
arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
if ( ! arena ) {
goto loser;
}
rv = cert_FindExtension(cert->extensions, oidtag,
&wrapperItem);
if ( rv != SECSuccess ) {
goto loser;
}
rv = SEC_QuickDERDecodeItem(arena, &tmpItem,
SEC_ASN1_GET(SEC_IA5StringTemplate), &wrapperItem);
if ( rv != SECSuccess ) {
goto loser;
}
retstring = (char *)PORT_Alloc(tmpItem.len + 1 );
if ( retstring == NULL ) {
goto loser;
}
PORT_Memcpy(retstring, tmpItem.data, tmpItem.len);
retstring[tmpItem.len] = '\0';
loser:
if ( arena ) {
PORT_FreeArena(arena, PR_FALSE);
}
if ( wrapperItem.data ) {
PORT_Free(wrapperItem.data);
}
return(retstring);
}
/* find the given extension in the certificate of the Issuer of 'cert' */
SECStatus
CERT_FindIssuerCertExtension(CERTCertificate *cert, int tag, SECItem *value)
{
CERTCertificate *issuercert;
SECStatus rv;
issuercert = CERT_FindCertByName(cert->dbhandle, &cert->derIssuer);
if ( issuercert ) {
rv = cert_FindExtension(issuercert->extensions, tag, value);
CERT_DestroyCertificate(issuercert);
} else {
rv = SECFailure;
}
return(rv);
}
SECStatus CERT_FindCRLEntryReasonExten (CERTCrlEntry *crlEntry,
CERTCRLEntryReasonCode *value)
{
SECItem wrapperItem = {siBuffer,0};
SECItem tmpItem = {siBuffer,0};
SECStatus rv;
PRArenaPool *arena = NULL;
arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
if ( ! arena ) {
return(SECFailure);
}
rv = cert_FindExtension(crlEntry->extensions, SEC_OID_X509_REASON_CODE,
&wrapperItem);
if ( rv != SECSuccess ) {
goto loser;
}
rv = SEC_QuickDERDecodeItem(arena, &tmpItem,
SEC_ASN1_GET(SEC_EnumeratedTemplate),
&wrapperItem);
if ( rv != SECSuccess ) {
goto loser;
}
*value = (CERTCRLEntryReasonCode) DER_GetInteger(&tmpItem);
loser:
if ( arena ) {
PORT_FreeArena(arena, PR_FALSE);
}
if ( wrapperItem.data ) {
PORT_Free(wrapperItem.data);
}
return (rv);
}
CERTCrlDistributionPoints *
CERT_FindCRLDistributionPoints (CERTCertificate *cert)
{
SECItem encodedExtenValue;
SECStatus rv;
CERTCrlDistributionPoints *dps;
encodedExtenValue.data = NULL;
encodedExtenValue.len = 0;
rv = cert_FindExtension(cert->extensions, SEC_OID_X509_CRL_DIST_POINTS,
&encodedExtenValue);
if ( rv != SECSuccess ) {
return (NULL);
}
dps = CERT_DecodeCRLDistributionPoints(cert->arena, &encodedExtenValue);
PORT_Free(encodedExtenValue.data);
return dps;
}
CERTAuthKeyID *
CERT_FindAuthKeyIDExten (PLArenaPool *arena, CERTCertificate *cert)
{
SECItem encodedExtenValue;
SECStatus rv;
CERTAuthKeyID *ret;
encodedExtenValue.data = NULL;
encodedExtenValue.len = 0;
rv = cert_FindExtension(cert->extensions, SEC_OID_X509_AUTH_KEY_ID,
&encodedExtenValue);
if ( rv != SECSuccess ) {
return (NULL);
}
ret = CERT_DecodeAuthKeyID (arena, &encodedExtenValue);
PORT_Free(encodedExtenValue.data);
encodedExtenValue.data = NULL;
return(ret);
}
SECStatus CERT_FindInvalidDateExten (CERTCrl *crl, int64 *value)
{
SECItem encodedExtenValue;
SECItem decodedExtenValue = {siBuffer,0};
SECStatus rv;
encodedExtenValue.data = decodedExtenValue.data = NULL;
encodedExtenValue.len = decodedExtenValue.len = 0;
rv = cert_FindExtension
(crl->extensions, SEC_OID_X509_INVALID_DATE, &encodedExtenValue);
if ( rv != SECSuccess )
return (rv);
rv = SEC_ASN1DecodeItem (NULL, &decodedExtenValue,
SEC_ASN1_GET(SEC_GeneralizedTimeTemplate),
&encodedExtenValue);
if (rv == SECSuccess)
rv = DER_GeneralizedTimeToTime(value, &encodedExtenValue);
PORT_Free (decodedExtenValue.data);
PORT_Free (encodedExtenValue.data);
return (rv);
}
SECStatus
CERT_FindBasicConstraintExten(CERTCertificate *cert,
CERTBasicConstraints *value)
{
SECItem encodedExtenValue;
SECStatus rv;
encodedExtenValue.data = NULL;
encodedExtenValue.len = 0;
rv = cert_FindExtension(cert->extensions, SEC_OID_X509_BASIC_CONSTRAINTS,
&encodedExtenValue);
if ( rv != SECSuccess ) {
return (rv);
}
rv = CERT_DecodeBasicConstraintValue (value, &encodedExtenValue);
/* free the raw extension data */
PORT_Free(encodedExtenValue.data);
encodedExtenValue.data = NULL;
return(rv);
}
/* find a URL extension in the cert
*/
char *
CERT_FindCertURLExtension(CERTCertificate *cert, SECOidTag tag)
{
SECStatus rv;
SECItem urlitem = {siBuffer,0};
SECItem urlstringitem = {siBuffer,0};
PLArenaPool *arena = NULL;
char *urlstring = NULL;
char *str;
int len;
if (!cert) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return NULL;
}
arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
if ( ! arena ) {
goto loser;
}
rv = cert_FindExtension(cert->extensions, tag, &urlitem);
if ( rv != SECSuccess ) {
goto loser;
}
rv = SEC_QuickDERDecodeItem(arena, &urlstringitem,
SEC_ASN1_GET(SEC_IA5StringTemplate), &urlitem);
if ( rv != SECSuccess ) {
goto loser;
}
len = urlstringitem.len + 1;
str = urlstring = (char *)PORT_Alloc(len);
if ( urlstring == NULL ) {
goto loser;
}
/* copy the URL */
PORT_Memcpy(str, urlstringitem.data, urlstringitem.len);
str += urlstringitem.len;
*str = '\0';
goto done;
loser:
if ( urlstring ) {
PORT_Free(urlstring);
}
urlstring = NULL;
done:
if ( arena ) {
PORT_FreeArena(arena, PR_FALSE);
}
if ( urlitem.data ) {
PORT_Free(urlitem.data);
}
return(urlstring);
}
SECStatus
CERT_FindCertExtension(const CERTCertificate *cert, int tag, SECItem *value)
{
return (cert_FindExtension (cert->extensions, tag, value));
}
SECStatus
CERT_FindCRLExtension(CERTCrl *crl, int tag, SECItem *value)
{
return (cert_FindExtension (crl->extensions, tag, value));
}
/* find a URL extension in the cert or its CA
* apply the base URL string if it exists
*/
char *
CERT_FindCertURLExtension(CERTCertificate *cert, int tag, int catag)
{
SECStatus rv;
SECItem urlitem = {siBuffer,0};
SECItem baseitem = {siBuffer,0};
SECItem urlstringitem = {siBuffer,0};
SECItem basestringitem = {siBuffer,0};
PRArenaPool *arena = NULL;
PRBool hasbase;
char *urlstring;
char *str;
int len;
unsigned int i;
urlstring = NULL;
arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
if ( ! arena ) {
goto loser;
}
hasbase = PR_FALSE;
rv = cert_FindExtension(cert->extensions, tag, &urlitem);
if ( rv == SECSuccess ) {
rv = cert_FindExtension(cert->extensions, SEC_OID_NS_CERT_EXT_BASE_URL,
&baseitem);
if ( rv == SECSuccess ) {
hasbase = PR_TRUE;
}
} else if ( catag ) {
/* if the cert doesn't have the extensions, see if the issuer does */
rv = CERT_FindIssuerCertExtension(cert, catag, &urlitem);
if ( rv != SECSuccess ) {
goto loser;
}
rv = CERT_FindIssuerCertExtension(cert, SEC_OID_NS_CERT_EXT_BASE_URL,
&baseitem);
if ( rv == SECSuccess ) {
hasbase = PR_TRUE;
}
} else {
goto loser;
}
rv = SEC_QuickDERDecodeItem(arena, &urlstringitem,
SEC_ASN1_GET(SEC_IA5StringTemplate), &urlitem);
if ( rv != SECSuccess ) {
goto loser;
}
if ( hasbase ) {
rv = SEC_QuickDERDecodeItem(arena, &basestringitem,
SEC_ASN1_GET(SEC_IA5StringTemplate),
&baseitem);
if ( rv != SECSuccess ) {
goto loser;
}
}
len = urlstringitem.len + ( hasbase ? basestringitem.len : 0 ) + 1;
str = urlstring = (char *)PORT_Alloc(len);
if ( urlstring == NULL ) {
goto loser;
}
/* copy the URL base first */
if ( hasbase ) {
/* if the urlstring has a : in it, then we assume it is an absolute
* URL, and will not get the base string pre-pended
*/
for ( i = 0; i < urlstringitem.len; i++ ) {
if ( urlstringitem.data[i] == ':' ) {
goto nobase;
}
}
PORT_Memcpy(str, basestringitem.data, basestringitem.len);
str += basestringitem.len;
}
nobase:
/* copy the rest (or all) of the URL */
PORT_Memcpy(str, urlstringitem.data, urlstringitem.len);
str += urlstringitem.len;
*str = '\0';
goto done;
loser:
if ( urlstring ) {
PORT_Free(urlstring);
}
urlstring = NULL;
done:
if ( arena ) {
PORT_FreeArena(arena, PR_FALSE);
}
if ( baseitem.data ) {
PORT_Free(baseitem.data);
}
if ( urlitem.data ) {
PORT_Free(urlitem.data);
}
return(urlstring);
}
