/*
* Copyright (c) 2000, 2009, 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.
*/
package sun.security.jgss.krb5;
import com.sun.security.jgss.AuthorizationDataEntry;
import org.ietf.jgss.*;
import java.io.InputStream;
import java.io.IOException;
import sun.security.krb5.*;
import java.net.InetAddress;
import sun.security.krb5.internal.AuthorizationData;
import sun.security.krb5.internal.KerberosTime;
class InitSecContextToken extends InitialToken {
private KrbApReq apReq = null;
For the context initiator to call. It constructs a new
InitSecContextToken to send over to the peer containing the desired
flags and the AP-REQ. It also updates the context with the local
sequence number and shared context key.
(When mutual auth is enabled the peer has an opportunity to
renegotiate the session key in the followup AcceptSecContextToken
that it sends.)
/**
* For the context initiator to call. It constructs a new
* InitSecContextToken to send over to the peer containing the desired
* flags and the AP-REQ. It also updates the context with the local
* sequence number and shared context key.
* (When mutual auth is enabled the peer has an opportunity to
* renegotiate the session key in the followup AcceptSecContextToken
* that it sends.)
*/
InitSecContextToken(Krb5Context context,
Credentials tgt,
Credentials serviceTicket)
throws KrbException, IOException, GSSException {
boolean mutualRequired = context.getMutualAuthState();
boolean useSubkey = true; // MIT Impl will crash if this is not set!
boolean useSequenceNumber = true;
OverloadedChecksum gssChecksum =
new OverloadedChecksum(context, tgt, serviceTicket);
Checksum checksum = gssChecksum.getChecksum();
context.setTktFlags(serviceTicket.getFlags());
context.setAuthTime(
new KerberosTime(serviceTicket.getAuthTime()).toString());
apReq = new KrbApReq(serviceTicket,
mutualRequired,
useSubkey,
useSequenceNumber,
checksum);
context.resetMySequenceNumber(apReq.getSeqNumber().intValue());
EncryptionKey subKey = apReq.getSubKey();
if (subKey != null)
context.setKey(subKey);
else
context.setKey(serviceTicket.getSessionKey());
if (!mutualRequired)
context.resetPeerSequenceNumber(0);
}
For the context acceptor to call. It reads the bytes out of an
InputStream and constructs an InitSecContextToken with them.
/**
* For the context acceptor to call. It reads the bytes out of an
* InputStream and constructs an InitSecContextToken with them.
*/
InitSecContextToken(Krb5Context context, EncryptionKey[] keys,
InputStream is)
throws IOException, GSSException, KrbException {
int tokenId = ((is.read()<<8) | is.read());
if (tokenId != Krb5Token.AP_REQ_ID)
throw new GSSException(GSSException.DEFECTIVE_TOKEN, -1,
"AP_REQ token id does not match!");
// XXX Modify KrbApReq cons to take an InputStream
byte[] apReqBytes =
new sun.security.util.DerValue(is).toByteArray();
//debug("=====ApReqBytes: [" + getHexBytes(apReqBytes) + "]\n");
InetAddress addr = null;
if (context.getChannelBinding() != null) {
addr = context.getChannelBinding().getInitiatorAddress();
}
apReq = new KrbApReq(apReqBytes, keys, addr);
//debug("\nReceived AP-REQ and authenticated it.\n");
EncryptionKey sessionKey = apReq.getCreds().getSessionKey();
/*
System.out.println("\n\nSession key from service ticket is: " +
getHexBytes(sessionKey.getBytes()));
*/
EncryptionKey subKey = apReq.getSubKey();
if (subKey != null) {
context.setKey(subKey);
/*
System.out.println("Sub-Session key from authenticator is: " +
getHexBytes(subKey.getBytes()) + "\n");
*/
} else {
context.setKey(sessionKey);
//System.out.println("Sub-Session Key Missing in Authenticator.\n");
}
OverloadedChecksum gssChecksum =
new OverloadedChecksum(context, apReq.getChecksum(), sessionKey);
gssChecksum.setContextFlags(context);
Credentials delegCred = gssChecksum.getDelegatedCreds();
if (delegCred != null) {
Krb5CredElement credElement =
Krb5InitCredential.getInstance(
(Krb5NameElement)context.getSrcName(),
delegCred);
context.setDelegCred(credElement);
}
Integer apReqSeqNumber = apReq.getSeqNumber();
int peerSeqNumber = (apReqSeqNumber != null ?
apReqSeqNumber.intValue() :
0);
context.resetPeerSequenceNumber(peerSeqNumber);
if (!context.getMutualAuthState())
// Use the same sequence number as the peer
// (Behaviour exhibited by the Windows SSPI server)
context.resetMySequenceNumber(peerSeqNumber);
context.setAuthTime(
new KerberosTime(apReq.getCreds().getAuthTime()).toString());
context.setTktFlags(apReq.getCreds().getFlags());
AuthorizationData ad = apReq.getCreds().getAuthzData();
if (ad == null) {
context.setAuthzData(null);
} else {
AuthorizationDataEntry[] authzData =
new AuthorizationDataEntry[ad.count()];
for (int i=0; i<ad.count(); i++) {
authzData[i] = new AuthorizationDataEntry(
ad.item(i).adType, ad.item(i).adData);
}
context.setAuthzData(authzData);
}
}
public final KrbApReq getKrbApReq() {
return apReq;
}
public final byte[] encode() throws IOException {
byte[] apReqBytes = apReq.getMessage();
byte[] retVal = new byte[2 + apReqBytes.length];
writeInt(Krb5Token.AP_REQ_ID, retVal, 0);
System.arraycopy(apReqBytes, 0, retVal, 2, apReqBytes.length);
// System.out.println("GSS-Token with AP_REQ is:");
// System.out.println(getHexBytes(retVal));
return retVal;
}
}