| /* |
| * Copyright (c) 2005, 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.spnego; |
| |
| import com.sun.security.jgss.ExtendedGSSContext; |
| import com.sun.security.jgss.InquireType; |
| import java.io.*; |
| import java.security.Provider; |
| import org.ietf.jgss.*; |
| import sun.security.jgss.*; |
| import sun.security.jgss.spi.*; |
| import sun.security.util.*; |
| |
| /** |
| * Implements the mechanism specific context class for SPNEGO |
| * GSS-API mechanism |
| * |
| * @author Seema Malkani |
| * @since 1.6 |
| */ |
| public class SpNegoContext implements GSSContextSpi { |
| |
| /* |
| * The different states that this context can be in. |
| */ |
| private static final int STATE_NEW = 1; |
| private static final int STATE_IN_PROCESS = 2; |
| private static final int STATE_DONE = 3; |
| private static final int STATE_DELETED = 4; |
| |
| private int state = STATE_NEW; |
| |
| /* |
| * Optional features that the application can set and their default |
| * values. |
| */ |
| private boolean credDelegState = false; |
| private boolean mutualAuthState = true; |
| private boolean replayDetState = true; |
| private boolean sequenceDetState = true; |
| private boolean confState = true; |
| private boolean integState = true; |
| private boolean delegPolicyState = false; |
| |
| private GSSNameSpi peerName = null; |
| private GSSNameSpi myName = null; |
| private SpNegoCredElement myCred = null; |
| |
| private GSSContext mechContext = null; |
| private byte[] DER_mechTypes = null; |
| |
| private int lifetime; |
| private ChannelBinding channelBinding; |
| private boolean initiator; |
| |
| // the underlying negotiated mechanism |
| private Oid internal_mech = null; |
| |
| // the SpNegoMechFactory that creates this context |
| final private SpNegoMechFactory factory; |
| |
| // debug property |
| static final boolean DEBUG = |
| java.security.AccessController.doPrivileged( |
| new sun.security.action.GetBooleanAction |
| ("sun.security.spnego.debug")).booleanValue(); |
| |
| /** |
| * Constructor for SpNegoContext to be called on the context initiator's |
| * side. |
| */ |
| public SpNegoContext(SpNegoMechFactory factory, GSSNameSpi peerName, |
| GSSCredentialSpi myCred, |
| int lifetime) throws GSSException { |
| |
| if (peerName == null) |
| throw new IllegalArgumentException("Cannot have null peer name"); |
| if ((myCred != null) && !(myCred instanceof SpNegoCredElement)) { |
| throw new IllegalArgumentException("Wrong cred element type"); |
| } |
| this.peerName = peerName; |
| this.myCred = (SpNegoCredElement) myCred; |
| this.lifetime = lifetime; |
| this.initiator = true; |
| this.factory = factory; |
| } |
| |
| /** |
| * Constructor for SpNegoContext to be called on the context acceptor's |
| * side. |
| */ |
| public SpNegoContext(SpNegoMechFactory factory, GSSCredentialSpi myCred) |
| throws GSSException { |
| if ((myCred != null) && !(myCred instanceof SpNegoCredElement)) { |
| throw new IllegalArgumentException("Wrong cred element type"); |
| } |
| this.myCred = (SpNegoCredElement) myCred; |
| this.initiator = false; |
| this.factory = factory; |
| } |
| |
| /** |
| * Constructor for SpNegoContext to import a previously exported context. |
| */ |
| public SpNegoContext(SpNegoMechFactory factory, byte [] interProcessToken) |
| throws GSSException { |
| throw new GSSException(GSSException.UNAVAILABLE, |
| -1, "GSS Import Context not available"); |
| } |
| |
| /** |
| * Requests that confidentiality be available. |
| */ |
| public final void requestConf(boolean value) throws GSSException { |
| if (state == STATE_NEW && isInitiator()) |
| confState = value; |
| } |
| |
| /** |
| * Is confidentiality available? |
| */ |
| public final boolean getConfState() { |
| return confState; |
| } |
| |
| /** |
| * Requests that integrity be available. |
| */ |
| public final void requestInteg(boolean value) throws GSSException { |
| if (state == STATE_NEW && isInitiator()) |
| integState = value; |
| } |
| |
| /** |
| * Requests that deleg policy be respected. |
| */ |
| public final void requestDelegPolicy(boolean value) throws GSSException { |
| if (state == STATE_NEW && isInitiator()) |
| delegPolicyState = value; |
| } |
| |
| /** |
| * Is integrity available? |
| */ |
| public final boolean getIntegState() { |
| return integState; |
| } |
| |
| /** |
| * Is deleg policy respected? |
| */ |
| public final boolean getDelegPolicyState() { |
| if (isInitiator() && mechContext != null && |
| mechContext instanceof ExtendedGSSContext && |
| (state == STATE_IN_PROCESS || state == STATE_DONE)) { |
| return ((ExtendedGSSContext)mechContext).getDelegPolicyState(); |
| } else { |
| return delegPolicyState; |
| } |
| } |
| |
| /** |
| * Requests that credential delegation be done during context |
| * establishment. |
| */ |
| public final void requestCredDeleg(boolean value) throws GSSException { |
| if (state == STATE_NEW && isInitiator()) |
| credDelegState = value; |
| } |
| |
| /** |
| * Is credential delegation enabled? |
| */ |
| public final boolean getCredDelegState() { |
| if (isInitiator() && mechContext != null && |
| (state == STATE_IN_PROCESS || state == STATE_DONE)) { |
| return mechContext.getCredDelegState(); |
| } else { |
| return credDelegState; |
| } |
| } |
| |
| /** |
| * Requests that mutual authentication be done during context |
| * establishment. Since this is fromm the client's perspective, it |
| * essentially requests that the server be authenticated. |
| */ |
| public final void requestMutualAuth(boolean value) throws GSSException { |
| if (state == STATE_NEW && isInitiator()) { |
| mutualAuthState = value; |
| } |
| } |
| |
| /** |
| * Is mutual authentication enabled? Since this is from the client's |
| * perspective, it essentially meas that the server is being |
| * authenticated. |
| */ |
| public final boolean getMutualAuthState() { |
| return mutualAuthState; |
| } |
| |
| /** |
| * Returns the mechanism oid. |
| * |
| * @return the Oid of this context |
| */ |
| public final Oid getMech() { |
| if (isEstablished()) { |
| return getNegotiatedMech(); |
| } |
| return (SpNegoMechFactory.GSS_SPNEGO_MECH_OID); |
| } |
| |
| public final Oid getNegotiatedMech() { |
| return (internal_mech); |
| } |
| |
| public final Provider getProvider() { |
| return SpNegoMechFactory.PROVIDER; |
| } |
| |
| public final void dispose() throws GSSException { |
| mechContext = null; |
| state = STATE_DELETED; |
| } |
| |
| /** |
| * Tests if this is the initiator side of the context. |
| * |
| * @return boolean indicating if this is initiator (true) |
| * or target (false) |
| */ |
| public final boolean isInitiator() { |
| return initiator; |
| } |
| |
| /** |
| * Tests if the context can be used for per-message service. |
| * Context may allow the calls to the per-message service |
| * functions before being fully established. |
| * |
| * @return boolean indicating if per-message methods can |
| * be called. |
| */ |
| public final boolean isProtReady() { |
| return (state == STATE_DONE); |
| } |
| |
| /** |
| * Initiator context establishment call. This method may be |
| * required to be called several times. A CONTINUE_NEEDED return |
| * call indicates that more calls are needed after the next token |
| * is received from the peer. |
| * |
| * @param is contains the token received from the peer. On the |
| * first call it will be ignored. |
| * @return any token required to be sent to the peer |
| * It is responsibility of the caller to send the token |
| * to its peer for processing. |
| * @exception GSSException |
| */ |
| public final byte[] initSecContext(InputStream is, int mechTokenSize) |
| throws GSSException { |
| |
| byte[] retVal = null; |
| NegTokenInit initToken = null; |
| byte[] mechToken = null; |
| int errorCode = GSSException.FAILURE; |
| |
| if (DEBUG) { |
| System.out.println("Entered SpNego.initSecContext with " + |
| "state=" + printState(state)); |
| } |
| if (!isInitiator()) { |
| throw new GSSException(GSSException.FAILURE, -1, |
| "initSecContext on an acceptor GSSContext"); |
| } |
| |
| try { |
| if (state == STATE_NEW) { |
| state = STATE_IN_PROCESS; |
| |
| errorCode = GSSException.NO_CRED; |
| |
| // determine available mech set |
| Oid[] mechList = getAvailableMechs(); |
| DER_mechTypes = getEncodedMechs(mechList); |
| |
| // pull out first mechanism |
| internal_mech = mechList[0]; |
| |
| // get the token for first mechanism |
| mechToken = GSS_initSecContext(null); |
| |
| errorCode = GSSException.DEFECTIVE_TOKEN; |
| // generate SPNEGO token |
| initToken = new NegTokenInit(DER_mechTypes, getContextFlags(), |
| mechToken, null); |
| if (DEBUG) { |
| System.out.println("SpNegoContext.initSecContext: " + |
| "sending token of type = " + |
| SpNegoToken.getTokenName(initToken.getType())); |
| } |
| // get the encoded token |
| retVal = initToken.getEncoded(); |
| |
| } else if (state == STATE_IN_PROCESS) { |
| |
| errorCode = GSSException.FAILURE; |
| if (is == null) { |
| throw new GSSException(errorCode, -1, |
| "No token received from peer!"); |
| } |
| |
| errorCode = GSSException.DEFECTIVE_TOKEN; |
| byte[] server_token = new byte[is.available()]; |
| SpNegoToken.readFully(is, server_token); |
| if (DEBUG) { |
| System.out.println("SpNegoContext.initSecContext: " + |
| "process received token = " + |
| SpNegoToken.getHexBytes(server_token)); |
| } |
| |
| // read the SPNEGO token |
| // token will be validated when parsing |
| NegTokenTarg targToken = new NegTokenTarg(server_token); |
| |
| if (DEBUG) { |
| System.out.println("SpNegoContext.initSecContext: " + |
| "received token of type = " + |
| SpNegoToken.getTokenName(targToken.getType())); |
| } |
| |
| // pull out mechanism |
| internal_mech = targToken.getSupportedMech(); |
| if (internal_mech == null) { |
| // return wth failure |
| throw new GSSException(errorCode, -1, |
| "supported mechansim from server is null"); |
| } |
| |
| // get the negotiated result |
| SpNegoToken.NegoResult negoResult = null; |
| int result = targToken.getNegotiatedResult(); |
| switch (result) { |
| case 0: |
| negoResult = SpNegoToken.NegoResult.ACCEPT_COMPLETE; |
| state = STATE_DONE; |
| break; |
| case 1: |
| negoResult = SpNegoToken.NegoResult.ACCEPT_INCOMPLETE; |
| state = STATE_IN_PROCESS; |
| break; |
| case 2: |
| negoResult = SpNegoToken.NegoResult.REJECT; |
| state = STATE_DELETED; |
| break; |
| default: |
| state = STATE_DONE; |
| break; |
| } |
| |
| errorCode = GSSException.BAD_MECH; |
| |
| if (negoResult == SpNegoToken.NegoResult.REJECT) { |
| throw new GSSException(errorCode, -1, |
| internal_mech.toString()); |
| } |
| |
| errorCode = GSSException.DEFECTIVE_TOKEN; |
| |
| if ((negoResult == SpNegoToken.NegoResult.ACCEPT_COMPLETE) || |
| (negoResult == SpNegoToken.NegoResult.ACCEPT_INCOMPLETE)) { |
| |
| // pull out the mechanism token |
| byte[] accept_token = targToken.getResponseToken(); |
| if (accept_token == null) { |
| if (!isMechContextEstablished()) { |
| // return with failure |
| throw new GSSException(errorCode, -1, |
| "mechanism token from server is null"); |
| } |
| } else { |
| mechToken = GSS_initSecContext(accept_token); |
| } |
| // verify MIC |
| if (!GSSUtil.useMSInterop()) { |
| byte[] micToken = targToken.getMechListMIC(); |
| if (!verifyMechListMIC(DER_mechTypes, micToken)) { |
| throw new GSSException(errorCode, -1, |
| "verification of MIC on MechList Failed!"); |
| } |
| } |
| if (isMechContextEstablished()) { |
| state = STATE_DONE; |
| retVal = mechToken; |
| if (DEBUG) { |
| System.out.println("SPNEGO Negotiated Mechanism = " |
| + internal_mech + " " + |
| GSSUtil.getMechStr(internal_mech)); |
| } |
| } else { |
| // generate SPNEGO token |
| initToken = new NegTokenInit(null, null, |
| mechToken, null); |
| if (DEBUG) { |
| System.out.println("SpNegoContext.initSecContext:" + |
| " continue sending token of type = " + |
| SpNegoToken.getTokenName(initToken.getType())); |
| } |
| // get the encoded token |
| retVal = initToken.getEncoded(); |
| } |
| } |
| |
| } else { |
| // XXX Use logging API |
| if (DEBUG) { |
| System.out.println(state); |
| } |
| } |
| if (DEBUG) { |
| if (retVal != null) { |
| System.out.println("SNegoContext.initSecContext: " + |
| "sending token = " + SpNegoToken.getHexBytes(retVal)); |
| } |
| } |
| } catch (GSSException e) { |
| GSSException gssException = |
| new GSSException(errorCode, -1, e.getMessage()); |
| gssException.initCause(e); |
| throw gssException; |
| } catch (IOException e) { |
| GSSException gssException = |
| new GSSException(GSSException.FAILURE, -1, e.getMessage()); |
| gssException.initCause(e); |
| throw gssException; |
| } |
| |
| return retVal; |
| } |
| |
| |
| /** |
| * Acceptor's context establishment call. This method may be |
| * required to be called several times. A CONTINUE_NEEDED return |
| * call indicates that more calls are needed after the next token |
| * is received from the peer. |
| * |
| * @param is contains the token received from the peer. |
| * @return any token required to be sent to the peer |
| * It is responsibility of the caller to send the token |
| * to its peer for processing. |
| * @exception GSSException |
| */ |
| public final byte[] acceptSecContext(InputStream is, int mechTokenSize) |
| throws GSSException { |
| |
| byte[] retVal = null; |
| SpNegoToken.NegoResult negoResult; |
| boolean valid = true; |
| |
| if (DEBUG) { |
| System.out.println("Entered SpNegoContext.acceptSecContext with " + |
| "state=" + printState(state)); |
| } |
| |
| if (isInitiator()) { |
| throw new GSSException(GSSException.FAILURE, -1, |
| "acceptSecContext on an initiator " + |
| "GSSContext"); |
| } |
| try { |
| if (state == STATE_NEW) { |
| state = STATE_IN_PROCESS; |
| |
| // read data |
| byte[] token = new byte[is.available()]; |
| SpNegoToken.readFully(is, token); |
| if (DEBUG) { |
| System.out.println("SpNegoContext.acceptSecContext: " + |
| "receiving token = " + |
| SpNegoToken.getHexBytes(token)); |
| } |
| |
| // read the SPNEGO token |
| // token will be validated when parsing |
| NegTokenInit initToken = new NegTokenInit(token); |
| |
| if (DEBUG) { |
| System.out.println("SpNegoContext.acceptSecContext: " + |
| "received token of type = " + |
| SpNegoToken.getTokenName(initToken.getType())); |
| } |
| |
| Oid[] mechList = initToken.getMechTypeList(); |
| DER_mechTypes = initToken.getMechTypes(); |
| if (DER_mechTypes == null) { |
| valid = false; |
| } |
| |
| // get the mechanism token |
| byte[] mechToken = initToken.getMechToken(); |
| |
| /* |
| * Select the best match between the list of mechs |
| * that the initiator requested and the list that |
| * the acceptor will support. |
| */ |
| Oid[] supported_mechSet = getAvailableMechs(); |
| Oid mech_wanted = |
| negotiate_mech_type(supported_mechSet, mechList); |
| if (mech_wanted == null) { |
| valid = false; |
| } |
| // save the desired mechansim |
| internal_mech = mech_wanted; |
| |
| // get the token for mechanism |
| byte[] accept_token = GSS_acceptSecContext(mechToken); |
| |
| // verify MIC |
| if (!GSSUtil.useMSInterop() && valid) { |
| valid = verifyMechListMIC(DER_mechTypes, |
| initToken.getMechListMIC()); |
| } |
| |
| // determine negotiated result status |
| if (valid) { |
| if (isMechContextEstablished()) { |
| negoResult = SpNegoToken.NegoResult.ACCEPT_COMPLETE; |
| state = STATE_DONE; |
| // now set the context flags for acceptor |
| setContextFlags(); |
| // print the negotiated mech info |
| if (DEBUG) { |
| System.out.println("SPNEGO Negotiated Mechanism = " |
| + internal_mech + " " + |
| GSSUtil.getMechStr(internal_mech)); |
| } |
| } else { |
| negoResult = SpNegoToken.NegoResult.ACCEPT_INCOMPLETE; |
| state = STATE_IN_PROCESS; |
| } |
| } else { |
| negoResult = SpNegoToken.NegoResult.REJECT; |
| state = STATE_DONE; |
| } |
| |
| if (DEBUG) { |
| System.out.println("SpNegoContext.acceptSecContext: " + |
| "mechanism wanted = " + mech_wanted); |
| System.out.println("SpNegoContext.acceptSecContext: " + |
| "negotiated result = " + negoResult); |
| } |
| |
| // generate SPNEGO token |
| NegTokenTarg targToken = new NegTokenTarg(negoResult.ordinal(), |
| mech_wanted, accept_token, null); |
| if (DEBUG) { |
| System.out.println("SpNegoContext.acceptSecContext: " + |
| "sending token of type = " + |
| SpNegoToken.getTokenName(targToken.getType())); |
| } |
| // get the encoded token |
| retVal = targToken.getEncoded(); |
| |
| } else if (state == STATE_IN_PROCESS) { |
| // read the token |
| byte[] client_token = new byte[is.available()]; |
| SpNegoToken.readFully(is, client_token); |
| byte[] accept_token = GSS_acceptSecContext(client_token); |
| if (accept_token == null) { |
| valid = false; |
| } |
| |
| // determine negotiated result status |
| if (valid) { |
| if (isMechContextEstablished()) { |
| negoResult = SpNegoToken.NegoResult.ACCEPT_COMPLETE; |
| state = STATE_DONE; |
| } else { |
| negoResult = SpNegoToken.NegoResult.ACCEPT_INCOMPLETE; |
| state = STATE_IN_PROCESS; |
| } |
| } else { |
| negoResult = SpNegoToken.NegoResult.REJECT; |
| state = STATE_DONE; |
| } |
| |
| // generate SPNEGO token |
| NegTokenTarg targToken = new NegTokenTarg(negoResult.ordinal(), |
| null, accept_token, null); |
| if (DEBUG) { |
| System.out.println("SpNegoContext.acceptSecContext: " + |
| "sending token of type = " + |
| SpNegoToken.getTokenName(targToken.getType())); |
| } |
| // get the encoded token |
| retVal = targToken.getEncoded(); |
| |
| } else { |
| // XXX Use logging API |
| if (DEBUG) { |
| System.out.println("AcceptSecContext: state = " + state); |
| } |
| } |
| if (DEBUG) { |
| System.out.println("SpNegoContext.acceptSecContext: " + |
| "sending token = " + SpNegoToken.getHexBytes(retVal)); |
| } |
| } catch (IOException e) { |
| GSSException gssException = |
| new GSSException(GSSException.FAILURE, -1, e.getMessage()); |
| gssException.initCause(e); |
| throw gssException; |
| } |
| |
| if (state == STATE_DONE) { |
| // now set the context flags for acceptor |
| setContextFlags(); |
| } |
| return retVal; |
| } |
| |
| /** |
| * obtain the available mechanisms |
| */ |
| private Oid[] getAvailableMechs() { |
| if (myCred != null) { |
| Oid[] mechs = new Oid[1]; |
| mechs[0] = myCred.getInternalMech(); |
| return mechs; |
| } else { |
| return factory.availableMechs; |
| } |
| } |
| |
| /** |
| * get ther DER encoded MechList |
| */ |
| private byte[] getEncodedMechs(Oid[] mechSet) |
| throws IOException, GSSException { |
| |
| DerOutputStream mech = new DerOutputStream(); |
| for (int i = 0; i < mechSet.length; i++) { |
| byte[] mechType = mechSet[i].getDER(); |
| mech.write(mechType); |
| } |
| // insert in SEQUENCE |
| DerOutputStream mechTypeList = new DerOutputStream(); |
| mechTypeList.write(DerValue.tag_Sequence, mech); |
| byte[] encoded = mechTypeList.toByteArray(); |
| return encoded; |
| } |
| |
| /** |
| * get the context flags |
| */ |
| private BitArray getContextFlags() { |
| BitArray out = new BitArray(7); |
| |
| if (getCredDelegState()) out.set(0, true); |
| if (getMutualAuthState()) out.set(1, true); |
| if (getReplayDetState()) out.set(2, true); |
| if (getSequenceDetState()) out.set(3, true); |
| if (getConfState()) out.set(5, true); |
| if (getIntegState()) out.set(6, true); |
| |
| return out; |
| } |
| |
| // Only called on acceptor side. On the initiator side, most flags |
| // are already set at request. For those that might get chanegd, |
| // state from mech below is used. |
| private void setContextFlags() { |
| |
| if (mechContext != null) { |
| // default for cred delegation is false |
| if (mechContext.getCredDelegState()) { |
| credDelegState = true; |
| } |
| // default for the following are true |
| if (!mechContext.getMutualAuthState()) { |
| mutualAuthState = false; |
| } |
| if (!mechContext.getReplayDetState()) { |
| replayDetState = false; |
| } |
| if (!mechContext.getSequenceDetState()) { |
| sequenceDetState = false; |
| } |
| if (!mechContext.getIntegState()) { |
| integState = false; |
| } |
| if (!mechContext.getConfState()) { |
| confState = false; |
| } |
| } |
| } |
| |
| /** |
| * generate MIC on mechList. Not used at the moment. |
| */ |
| /*private byte[] generateMechListMIC(byte[] mechTypes) |
| throws GSSException { |
| |
| // sanity check the required input |
| if (mechTypes == null) { |
| if (DEBUG) { |
| System.out.println("SpNegoContext: no MIC token included"); |
| } |
| return null; |
| } |
| |
| // check if mechansim supports integrity |
| if (!mechContext.getIntegState()) { |
| if (DEBUG) { |
| System.out.println("SpNegoContext: no MIC token included" + |
| " - mechanism does not support integrity"); |
| } |
| return null; |
| } |
| |
| // compute MIC on DER encoded mechanism list |
| byte[] mic = null; |
| try { |
| MessageProp prop = new MessageProp(0, true); |
| mic = getMIC(mechTypes, 0, mechTypes.length, prop); |
| if (DEBUG) { |
| System.out.println("SpNegoContext: getMIC = " + |
| SpNegoToken.getHexBytes(mic)); |
| } |
| } catch (GSSException e) { |
| mic = null; |
| if (DEBUG) { |
| System.out.println("SpNegoContext: no MIC token included" + |
| " - getMIC failed : " + e.getMessage()); |
| } |
| } |
| return mic; |
| }*/ |
| |
| /** |
| * verify MIC on MechList |
| */ |
| private boolean verifyMechListMIC(byte[] mechTypes, byte[] token) |
| throws GSSException { |
| |
| // sanity check the input |
| if (token == null) { |
| if (DEBUG) { |
| System.out.println("SpNegoContext: no MIC token validation"); |
| } |
| return true; |
| } |
| |
| // check if mechansim supports integrity |
| if (!mechContext.getIntegState()) { |
| if (DEBUG) { |
| System.out.println("SpNegoContext: no MIC token validation" + |
| " - mechanism does not support integrity"); |
| } |
| return true; |
| } |
| |
| // now verify the token |
| boolean valid = false; |
| try { |
| MessageProp prop = new MessageProp(0, true); |
| verifyMIC(token, 0, token.length, mechTypes, |
| 0, mechTypes.length, prop); |
| valid = true; |
| } catch (GSSException e) { |
| valid = false; |
| if (DEBUG) { |
| System.out.println("SpNegoContext: MIC validation failed! " + |
| e.getMessage()); |
| } |
| } |
| return valid; |
| } |
| |
| /** |
| * call gss_init_sec_context for the corresponding underlying mechanism |
| */ |
| private byte[] GSS_initSecContext(byte[] token) throws GSSException { |
| byte[] tok = null; |
| |
| if (mechContext == null) { |
| // initialize mech context |
| GSSName serverName = |
| factory.manager.createName(peerName.toString(), |
| peerName.getStringNameType(), internal_mech); |
| GSSCredential cred = null; |
| if (myCred != null) { |
| // create context with provided credential |
| cred = new GSSCredentialImpl(factory.manager, |
| myCred.getInternalCred()); |
| } |
| mechContext = |
| factory.manager.createContext(serverName, |
| internal_mech, cred, GSSContext.DEFAULT_LIFETIME); |
| mechContext.requestConf(confState); |
| mechContext.requestInteg(integState); |
| mechContext.requestCredDeleg(credDelegState); |
| mechContext.requestMutualAuth(mutualAuthState); |
| mechContext.requestReplayDet(replayDetState); |
| mechContext.requestSequenceDet(sequenceDetState); |
| if (mechContext instanceof ExtendedGSSContext) { |
| ((ExtendedGSSContext)mechContext).requestDelegPolicy( |
| delegPolicyState); |
| } |
| } |
| |
| // pass token |
| if (token != null) { |
| tok = token; |
| } else { |
| tok = new byte[0]; |
| } |
| |
| // pass token to mechanism initSecContext |
| byte[] init_token = mechContext.initSecContext(tok, 0, tok.length); |
| |
| return init_token; |
| } |
| |
| /** |
| * call gss_accept_sec_context for the corresponding underlying mechanism |
| */ |
| private byte[] GSS_acceptSecContext(byte[] token) throws GSSException { |
| |
| if (mechContext == null) { |
| // initialize mech context |
| GSSCredential cred = null; |
| if (myCred != null) { |
| // create context with provided credential |
| cred = new GSSCredentialImpl(factory.manager, |
| myCred.getInternalCred()); |
| } |
| mechContext = |
| factory.manager.createContext(cred); |
| } |
| |
| // pass token to mechanism acceptSecContext |
| byte[] accept_token = |
| mechContext.acceptSecContext(token, 0, token.length); |
| |
| return accept_token; |
| } |
| |
| /** |
| * This routine compares the recieved mechset to the mechset that |
| * this server can support. It looks sequentially through the mechset |
| * and the first one that matches what the server can support is |
| * chosen as the negotiated mechanism. If one is found, negResult |
| * is set to ACCEPT_COMPLETE, otherwise we return NULL and negResult |
| * is set to REJECT. |
| */ |
| private static Oid negotiate_mech_type(Oid[] supported_mechSet, |
| Oid[] mechSet) { |
| for (int i = 0; i < supported_mechSet.length; i++) { |
| for (int j = 0; j < mechSet.length; j++) { |
| if (mechSet[j].equals(supported_mechSet[i])) { |
| if (DEBUG) { |
| System.out.println("SpNegoContext: " + |
| "negotiated mechanism = " + mechSet[j]); |
| } |
| return (mechSet[j]); |
| } |
| } |
| } |
| return null; |
| } |
| |
| public final boolean isEstablished() { |
| return (state == STATE_DONE); |
| } |
| |
| public final boolean isMechContextEstablished() { |
| if (mechContext != null) { |
| return mechContext.isEstablished(); |
| } else { |
| if (DEBUG) { |
| System.out.println("The underlying mechansim context has " + |
| "not been initialized"); |
| } |
| return false; |
| } |
| } |
| |
| public final byte [] export() throws GSSException { |
| throw new GSSException(GSSException.UNAVAILABLE, -1, |
| "GSS Export Context not available"); |
| } |
| |
| /** |
| * Sets the channel bindings to be used during context |
| * establishment. |
| */ |
| public final void setChannelBinding(ChannelBinding channelBinding) |
| throws GSSException { |
| this.channelBinding = channelBinding; |
| } |
| |
| final ChannelBinding getChannelBinding() { |
| return channelBinding; |
| } |
| |
| /* |
| * Anonymity is a little different in that after an application |
| * requests anonymity it will want to know whether the mechanism |
| * can support it or not, prior to sending any tokens across for |
| * context establishment. Since this is from the initiator's |
| * perspective, it essentially requests that the initiator be |
| * anonymous. |
| */ |
| public final void requestAnonymity(boolean value) throws GSSException { |
| // Ignore silently. Application will check back with |
| // getAnonymityState. |
| } |
| |
| // RFC 2853 actually calls for this to be called after context |
| // establishment to get the right answer, but that is |
| // incorrect. The application may not want to send over any |
| // tokens if anonymity is not available. |
| public final boolean getAnonymityState() { |
| return false; |
| } |
| |
| /** |
| * Requests the desired lifetime. Can only be used on the context |
| * initiator's side. |
| */ |
| public void requestLifetime(int lifetime) throws GSSException { |
| if (state == STATE_NEW && isInitiator()) |
| this.lifetime = lifetime; |
| } |
| |
| /** |
| * The lifetime remaining for this context. |
| */ |
| public final int getLifetime() { |
| if (mechContext != null) { |
| return mechContext.getLifetime(); |
| } else { |
| return GSSContext.INDEFINITE_LIFETIME; |
| } |
| } |
| |
| public final boolean isTransferable() throws GSSException { |
| return false; |
| } |
| |
| /** |
| * Requests that sequence checking be done on the GSS wrap and MIC |
| * tokens. |
| */ |
| public final void requestSequenceDet(boolean value) throws GSSException { |
| if (state == STATE_NEW && isInitiator()) |
| sequenceDetState = value; |
| } |
| |
| /** |
| * Is sequence checking enabled on the GSS Wrap and MIC tokens? |
| * We enable sequence checking if replay detection is enabled. |
| */ |
| public final boolean getSequenceDetState() { |
| return sequenceDetState || replayDetState; |
| } |
| |
| /** |
| * Requests that replay detection be done on the GSS wrap and MIC |
| * tokens. |
| */ |
| public final void requestReplayDet(boolean value) throws GSSException { |
| if (state == STATE_NEW && isInitiator()) |
| replayDetState = value; |
| } |
| |
| /** |
| * Is replay detection enabled on the GSS wrap and MIC tokens? |
| * We enable replay detection if sequence checking is enabled. |
| */ |
| public final boolean getReplayDetState() { |
| return replayDetState || sequenceDetState; |
| } |
| |
| public final GSSNameSpi getTargName() throws GSSException { |
| // fill-in the GSSName |
| // get the peer name for the mechanism |
| if (mechContext != null) { |
| GSSNameImpl targName = (GSSNameImpl)mechContext.getTargName(); |
| peerName = (GSSNameSpi) targName.getElement(internal_mech); |
| return peerName; |
| } else { |
| if (DEBUG) { |
| System.out.println("The underlying mechansim context has " + |
| "not been initialized"); |
| } |
| return null; |
| } |
| } |
| |
| public final GSSNameSpi getSrcName() throws GSSException { |
| // fill-in the GSSName |
| // get the src name for the mechanism |
| if (mechContext != null) { |
| GSSNameImpl srcName = (GSSNameImpl)mechContext.getSrcName(); |
| myName = (GSSNameSpi) srcName.getElement(internal_mech); |
| return myName; |
| } else { |
| if (DEBUG) { |
| System.out.println("The underlying mechansim context has " + |
| "not been initialized"); |
| } |
| return null; |
| } |
| } |
| |
| /** |
| * Returns the delegated credential for the context. This |
| * is an optional feature of contexts which not all |
| * mechanisms will support. A context can be requested to |
| * support credential delegation by using the <b>CRED_DELEG</b>. |
| * This is only valid on the acceptor side of the context. |
| * @return GSSCredentialSpi object for the delegated credential |
| * @exception GSSException |
| * @see GSSContext#getDelegCredState |
| */ |
| public final GSSCredentialSpi getDelegCred() throws GSSException { |
| if (state != STATE_IN_PROCESS && state != STATE_DONE) |
| throw new GSSException(GSSException.NO_CONTEXT); |
| if (mechContext != null) { |
| GSSCredentialImpl delegCred = |
| (GSSCredentialImpl)mechContext.getDelegCred(); |
| // determine delegated cred element usage |
| boolean initiate = false; |
| if (delegCred.getUsage() == GSSCredential.INITIATE_ONLY) { |
| initiate = true; |
| } |
| GSSCredentialSpi mechCred = (GSSCredentialSpi) |
| delegCred.getElement(internal_mech, initiate); |
| SpNegoCredElement cred = new SpNegoCredElement(mechCred); |
| return cred.getInternalCred(); |
| } else { |
| throw new GSSException(GSSException.NO_CONTEXT, -1, |
| "getDelegCred called in invalid state!"); |
| } |
| } |
| |
| public final int getWrapSizeLimit(int qop, boolean confReq, |
| int maxTokSize) throws GSSException { |
| if (mechContext != null) { |
| return mechContext.getWrapSizeLimit(qop, confReq, maxTokSize); |
| } else { |
| throw new GSSException(GSSException.NO_CONTEXT, -1, |
| "getWrapSizeLimit called in invalid state!"); |
| } |
| } |
| |
| public final byte[] wrap(byte inBuf[], int offset, int len, |
| MessageProp msgProp) throws GSSException { |
| if (mechContext != null) { |
| return mechContext.wrap(inBuf, offset, len, msgProp); |
| } else { |
| throw new GSSException(GSSException.NO_CONTEXT, -1, |
| "Wrap called in invalid state!"); |
| } |
| } |
| |
| public final void wrap(InputStream is, OutputStream os, |
| MessageProp msgProp) throws GSSException { |
| if (mechContext != null) { |
| mechContext.wrap(is, os, msgProp); |
| } else { |
| throw new GSSException(GSSException.NO_CONTEXT, -1, |
| "Wrap called in invalid state!"); |
| } |
| } |
| |
| public final byte[] unwrap(byte inBuf[], int offset, int len, |
| MessageProp msgProp) |
| throws GSSException { |
| if (mechContext != null) { |
| return mechContext.unwrap(inBuf, offset, len, msgProp); |
| } else { |
| throw new GSSException(GSSException.NO_CONTEXT, -1, |
| "UnWrap called in invalid state!"); |
| } |
| } |
| |
| public final void unwrap(InputStream is, OutputStream os, |
| MessageProp msgProp) throws GSSException { |
| if (mechContext != null) { |
| mechContext.unwrap(is, os, msgProp); |
| } else { |
| throw new GSSException(GSSException.NO_CONTEXT, -1, |
| "UnWrap called in invalid state!"); |
| } |
| } |
| |
| public final byte[] getMIC(byte []inMsg, int offset, int len, |
| MessageProp msgProp) |
| throws GSSException { |
| if (mechContext != null) { |
| return mechContext.getMIC(inMsg, offset, len, msgProp); |
| } else { |
| throw new GSSException(GSSException.NO_CONTEXT, -1, |
| "getMIC called in invalid state!"); |
| } |
| } |
| |
| public final void getMIC(InputStream is, OutputStream os, |
| MessageProp msgProp) throws GSSException { |
| if (mechContext != null) { |
| mechContext.getMIC(is, os, msgProp); |
| } else { |
| throw new GSSException(GSSException.NO_CONTEXT, -1, |
| "getMIC called in invalid state!"); |
| } |
| } |
| |
| public final void verifyMIC(byte []inTok, int tokOffset, int tokLen, |
| byte[] inMsg, int msgOffset, int msgLen, |
| MessageProp msgProp) |
| throws GSSException { |
| if (mechContext != null) { |
| mechContext.verifyMIC(inTok, tokOffset, tokLen, inMsg, msgOffset, |
| msgLen, msgProp); |
| } else { |
| throw new GSSException(GSSException.NO_CONTEXT, -1, |
| "verifyMIC called in invalid state!"); |
| } |
| } |
| |
| public final void verifyMIC(InputStream is, InputStream msgStr, |
| MessageProp msgProp) throws GSSException { |
| if (mechContext != null) { |
| mechContext.verifyMIC(is, msgStr, msgProp); |
| } else { |
| throw new GSSException(GSSException.NO_CONTEXT, -1, |
| "verifyMIC called in invalid state!"); |
| } |
| } |
| |
| private static String printState(int state) { |
| switch (state) { |
| case STATE_NEW: |
| return ("STATE_NEW"); |
| case STATE_IN_PROCESS: |
| return ("STATE_IN_PROCESS"); |
| case STATE_DONE: |
| return ("STATE_DONE"); |
| case STATE_DELETED: |
| return ("STATE_DELETED"); |
| default: |
| return ("Unknown state " + state); |
| } |
| } |
| |
| /** |
| * Retrieve attribute of the context for {@code type}. |
| */ |
| public Object inquireSecContext(InquireType type) |
| throws GSSException { |
| if (mechContext == null) { |
| throw new GSSException(GSSException.NO_CONTEXT, -1, |
| "Underlying mech not established."); |
| } |
| if (mechContext instanceof ExtendedGSSContext) { |
| return ((ExtendedGSSContext)mechContext).inquireSecContext(type); |
| } else { |
| throw new GSSException(GSSException.BAD_MECH, -1, |
| "inquireSecContext not supported by underlying mech."); |
| } |
| } |
| } |
| |
