| /* |
| * Copyright (c) 2000, 2018, 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.action.GetPropertyAction; |
| import sun.security.krb5.*; |
| import java.net.InetAddress; |
| import sun.security.krb5.internal.AuthorizationData; |
| import sun.security.krb5.internal.KerberosTime; |
| |
| class InitSecContextToken extends InitialToken { |
| |
| // If non-mutual authentication is requested, there is no AP-REP message. |
| // The acceptor thus has no chance to send the seq-number field to the |
| // initiator. In this case, the initiator and acceptor should has an |
| // agreement to derive acceptor's initial seq-number if the acceptor wishes |
| // to send messages to the initiator. |
| |
| // If this flag is true, it will the same as the initiator's initial |
| // seq-number (as MIT krb5 and Windows SSPI do). Otherwise, it will be zero |
| // (as Heimdal does). The default value is true. |
| private static final boolean ACCEPTOR_USE_INITIATOR_SEQNUM; |
| |
| static { |
| // The ACCEPTOR_USE_INITIATOR_SEQNUM value is determined by the system |
| // property "sun.security.krb5.acceptor.sequence.number.nonmutual", |
| // which can be set to "initiator", "zero" or "0". |
| String propName = "sun.security.krb5.acceptor.sequence.number.nonmutual"; |
| String s = GetPropertyAction.privilegedGetProperty(propName, "initiator"); |
| if (s.equals("initiator")) { |
| ACCEPTOR_USE_INITIATOR_SEQNUM = true; |
| } else if (s.equals("zero") || s.equals("0")) { |
| ACCEPTOR_USE_INITIATOR_SEQNUM = false; |
| } else { |
| throw new AssertionError("Unrecognized value for " + propName |
| + ": " + s); |
| } |
| } |
| |
| 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.) |
| */ |
| 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(Krb5Context.INITIATOR_SUBKEY, subKey); |
| else |
| context.setKey(Krb5Context.SESSION_KEY, serviceTicket.getSessionKey()); |
| |
| if (!mutualRequired) |
| context.resetPeerSequenceNumber( |
| ACCEPTOR_USE_INITIATOR_SEQNUM |
| ? apReq.getSeqNumber().intValue() |
| : 0); |
| } |
| |
| /** |
| * For the context acceptor to call. It reads the bytes out of an |
| * InputStream and constructs an InitSecContextToken with them. |
| */ |
| InitSecContextToken(Krb5Context context, Krb5AcceptCredential cred, |
| 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, cred, 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(Krb5Context.INITIATOR_SUBKEY, subKey); |
| /* |
| System.out.println("Sub-Session key from authenticator is: " + |
| getHexBytes(subKey.getBytes()) + "\n"); |
| */ |
| } else { |
| context.setKey(Krb5Context.SESSION_KEY, sessionKey); |
| //System.out.println("Sub-Session Key Missing in Authenticator.\n"); |
| } |
| |
| OverloadedChecksum gssChecksum = new OverloadedChecksum( |
| context, apReq.getChecksum(), sessionKey, subKey); |
| 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()) { |
| context.resetMySequenceNumber( |
| ACCEPTOR_USE_INITIATOR_SEQNUM |
| ? peerSeqNumber |
| : 0); |
| } |
| 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; |
| } |
| } |
