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/*
* Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
*
* (C) Copyright IBM Corp. 1999 All Rights Reserved.
* Copyright 1997 The Open Group Research Institute. All rights reserved.
*/
package sun.security.krb5;
import sun.security.krb5.internal.*;
import sun.security.krb5.internal.crypto.KeyUsage;
import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;
import sun.security.util.DerValue;
/**
* This class encapsulates the KRB-CRED message that a client uses to
* send its delegated credentials to a server.
*
* Supports delegation of one ticket only.
* @author Mayank Upadhyay
*/
public class KrbCred {
private static boolean DEBUG = Krb5.DEBUG;
private byte[] obuf = null;
private KRBCred credMessg = null;
private Ticket ticket = null;
private EncKrbCredPart encPart = null;
private Credentials creds = null;
private KerberosTime timeStamp = null;
// Used in InitialToken with null key
public KrbCred(Credentials tgt,
Credentials serviceTicket,
EncryptionKey key)
throws KrbException, IOException {
PrincipalName client = tgt.getClient();
PrincipalName tgService = tgt.getServer();
PrincipalName server = serviceTicket.getServer();
if (!serviceTicket.getClient().equals(client))
throw new KrbException(Krb5.KRB_ERR_GENERIC,
"Client principal does not match");
// XXX Check Windows flag OK-TO-FORWARD-TO
// Invoke TGS-REQ to get a forwarded TGT for the peer
KDCOptions options = new KDCOptions();
options.set(KDCOptions.FORWARDED, true);
options.set(KDCOptions.FORWARDABLE, true);
HostAddresses sAddrs = null;
// GSSName.NT_HOSTBASED_SERVICE should display with KRB_NT_SRV_HST
if (server.getNameType() == PrincipalName.KRB_NT_SRV_HST) {
sAddrs = new HostAddresses(server);
} else if (server.getNameType() == PrincipalName.KRB_NT_UNKNOWN) {
// Sometimes this is also a server
if (server.getNameStrings().length >= 2) {
String host = server.getNameStrings()[1];
try {
InetAddress[] addr = InetAddress.getAllByName(host);
if (addr != null && addr.length > 0) {
sAddrs = new HostAddresses(addr);
}
} catch (UnknownHostException ioe) {
// maybe we guessed wrong, let sAddrs be null
}
}
}
KrbTgsReq tgsReq = new KrbTgsReq(options, tgt, tgService,
null, null, null, null, null,
sAddrs, // Only non-null for KRB_NT_SRV_HST, see JDK-8132111
null, null, null);
credMessg = createMessage(tgsReq.sendAndGetCreds(), key);
obuf = credMessg.asn1Encode();
}
KRBCred createMessage(Credentials delegatedCreds, EncryptionKey key)
throws KrbException, IOException {
EncryptionKey sessionKey
= delegatedCreds.getSessionKey();
PrincipalName princ = delegatedCreds.getClient();
Realm realm = princ.getRealm();
PrincipalName tgService = delegatedCreds.getServer();
KrbCredInfo credInfo = new KrbCredInfo(sessionKey,
princ, delegatedCreds.flags, delegatedCreds.authTime,
delegatedCreds.startTime, delegatedCreds.endTime,
delegatedCreds.renewTill, tgService,
delegatedCreds.cAddr);
timeStamp = KerberosTime.now();
KrbCredInfo[] credInfos = {credInfo};
EncKrbCredPart encPart =
new EncKrbCredPart(credInfos,
timeStamp, null, null, null, null);
EncryptedData encEncPart = new EncryptedData(key,
encPart.asn1Encode(), KeyUsage.KU_ENC_KRB_CRED_PART);
Ticket[] tickets = {delegatedCreds.ticket};
credMessg = new KRBCred(tickets, encEncPart);
return credMessg;
}
// Used in InitialToken, NULL_KEY might be used
public KrbCred(byte[] asn1Message, EncryptionKey key)
throws KrbException, IOException {
credMessg = new KRBCred(asn1Message);
ticket = credMessg.tickets[0];
if (credMessg.encPart.getEType() == 0) {
key = EncryptionKey.NULL_KEY;
}
byte[] temp = credMessg.encPart.decrypt(key,
KeyUsage.KU_ENC_KRB_CRED_PART);
byte[] plainText = credMessg.encPart.reset(temp);
DerValue encoding = new DerValue(plainText);
EncKrbCredPart encPart = new EncKrbCredPart(encoding);
timeStamp = encPart.timeStamp;
KrbCredInfo credInfo = encPart.ticketInfo[0];
EncryptionKey credInfoKey = credInfo.key;
PrincipalName pname = credInfo.pname;
TicketFlags flags = credInfo.flags;
KerberosTime authtime = credInfo.authtime;
KerberosTime starttime = credInfo.starttime;
KerberosTime endtime = credInfo.endtime;
KerberosTime renewTill = credInfo.renewTill;
PrincipalName sname = credInfo.sname;
HostAddresses caddr = credInfo.caddr;
if (DEBUG) {
System.out.println(">>>Delegated Creds have pname=" + pname
+ " sname=" + sname
+ " authtime=" + authtime
+ " starttime=" + starttime
+ " endtime=" + endtime
+ "renewTill=" + renewTill);
}
creds = new Credentials(ticket, pname, null, sname, null, credInfoKey,
flags, authtime, starttime, endtime, renewTill, caddr);
}
/**
* Returns the delegated credentials from the peer.
*/
public Credentials[] getDelegatedCreds() {
Credentials[] allCreds = {creds};
return allCreds;
}
/**
* Returns the ASN.1 encoding that should be sent to the peer.
*/
public byte[] getMessage() {
return obuf;
}
}
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