| /* |
| * Copyright (c) 2000, 2006, 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 org.ietf.jgss.*; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.io.IOException; |
| import java.io.ByteArrayInputStream; |
| import sun.security.krb5.*; |
| |
| class AcceptSecContextToken extends InitialToken { |
| |
| private KrbApRep apRep = null; |
| |
| /** |
| * Creates an AcceptSecContextToken for the context acceptor to send to |
| * the context initiator. |
| */ |
| public AcceptSecContextToken(Krb5Context context, |
| KrbApReq apReq) |
| throws KrbException, IOException { |
| |
| /* |
| * RFC 1964, section 1.2 states: |
| * (1) context key: uses Kerberos session key (or subkey, if |
| * present in authenticator emitted by context initiator) directly |
| * |
| * This does not mention context acceptor. Hence we will not |
| * generate a subkey on the acceptor side. Note: Our initiator will |
| * still allow another acceptor to generate a subkey, even though |
| * our acceptor does not do so. |
| */ |
| boolean useSubkey = false; |
| |
| boolean useSequenceNumber = true; |
| |
| apRep = new KrbApRep(apReq, useSequenceNumber, useSubkey); |
| |
| context.resetMySequenceNumber(apRep.getSeqNumber().intValue()); |
| |
| /* |
| * Note: The acceptor side context key was set when the |
| * InitSecContextToken was received. |
| */ |
| } |
| |
| /** |
| * Creates an AcceptSecContextToken at the context initiator's side |
| * using the bytes received from the acceptor. |
| */ |
| public AcceptSecContextToken(Krb5Context context, |
| Credentials serviceCreds, KrbApReq apReq, |
| InputStream is) |
| throws IOException, GSSException, KrbException { |
| |
| int tokenId = ((is.read()<<8) | is.read()); |
| |
| if (tokenId != Krb5Token.AP_REP_ID) |
| throw new GSSException(GSSException.DEFECTIVE_TOKEN, -1, |
| "AP_REP token id does not match!"); |
| |
| byte[] apRepBytes = |
| new sun.security.util.DerValue(is).toByteArray(); |
| |
| KrbApRep apRep = new KrbApRep(apRepBytes, serviceCreds, apReq); |
| |
| /* |
| * Allow the context acceptor to set a subkey if desired, even |
| * though our context acceptor will not do so. |
| */ |
| EncryptionKey subKey = apRep.getSubKey(); |
| if (subKey != null) { |
| context.setKey(Krb5Context.ACCEPTOR_SUBKEY, subKey); |
| /* |
| System.out.println("\n\nSub-Session key from AP-REP is: " + |
| getHexBytes(subKey.getBytes()) + "\n"); |
| */ |
| } |
| |
| Integer apRepSeqNumber = apRep.getSeqNumber(); |
| int peerSeqNumber = (apRepSeqNumber != null ? |
| apRepSeqNumber.intValue() : |
| 0); |
| context.resetPeerSequenceNumber(peerSeqNumber); |
| } |
| |
| public final byte[] encode() throws IOException { |
| byte[] apRepBytes = apRep.getMessage(); |
| byte[] retVal = new byte[2 + apRepBytes.length]; |
| writeInt(Krb5Token.AP_REP_ID, retVal, 0); |
| System.arraycopy(apRepBytes, 0, retVal, 2, apRepBytes.length); |
| return retVal; |
| } |
| } |