259 lines
9.3 KiB
Java
259 lines
9.3 KiB
Java
/**
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* $RCSfile$
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* $Revision: $
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* $Date: $
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*
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*
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* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smack.sasl;
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import javax.security.sasl.*;
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import java.util.*;
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import java.io.IOException;
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import org.jivesoftware.smack.SASLAuthentication;
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import org.jivesoftware.smack.util.Base64;
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/**
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* Implementation of the SASL GSSAPI mechanisn
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*
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*
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* @author Jay Kline
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*/
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public class SASLGSSAPIMechanism extends SASLMechanism {
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private static final String protocol = "xmpp";
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private static final String[] mechanisms = {"GSSAPI"};
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private SaslClient sc;
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public SASLGSSAPIMechanism(SASLAuthentication saslAuthentication) {
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super(saslAuthentication);
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System.setProperty("java.security.krb5.debug","true");
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System.setProperty("javax.security.auth.useSubjectCredsOnly","false");
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System.setProperty("java.security.auth.login.config","gss.conf");
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}
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protected String getName() {
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return "GSSAPI";
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}
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/**
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* Builds and sends the <tt>auth</tt> stanza to the server.
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* This overrides from the abstract class because the initial token
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* needed for GSSAPI is binary, and not safe to put in a string, thus
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* getAuthenticationText() cannot be used.
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*
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* @param username the username of the user being authenticated.
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* @param host the hostname where the user account resides.
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* @param password the password of the user (ignored for GSSAPI)
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* @throws IOException If a network error occures while authenticating.
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*/
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public void authenticate(String username, String host, String password) throws IOException {
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// Build the authentication stanza encoding the authentication text
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StringBuffer stanza = new StringBuffer();
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Map props = new HashMap();
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sc = Sasl.createSaslClient(mechanisms, username, protocol, host, props, null);
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stanza.append("<auth mechanism=\"").append(getName());
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stanza.append("\" xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\">");
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if(sc.hasInitialResponse()) {
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byte[] response = sc.evaluateChallenge(new byte[0]);
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String authenticationText = Base64.encodeBytes(response,Base64.DONT_BREAK_LINES);
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if(authenticationText != null && !authenticationText.equals("")) {
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stanza.append(authenticationText);
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}
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}
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stanza.append("</auth>");
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// Send the authentication to the server
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getSASLAuthentication().send(stanza.toString());
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}
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protected String getAuthenticationText(String username, String host, String password) {
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// Unused, see authenticate
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return null;
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}
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/**
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* The server is challenging the SASL mechanism for the stanza he just sent. Send a
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* response to the server's challenge. This overrieds from the abstract class because the
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* tokens needed for GSSAPI are binary, and not safe to put in a string, thus
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* getChallengeResponse() cannot be used.
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*
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* @param challenge a base64 encoded string representing the challenge.
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*/
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public void challengeReceived(String challenge) throws IOException {
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// Build the challenge response stanza encoding the response text
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StringBuffer stanza = new StringBuffer();
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byte response[];
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if(challenge != null) {
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response = sc.evaluateChallenge(Base64.decode(challenge));
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} else {
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response = sc.evaluateChallenge(null);
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}
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String authenticationText = Base64.encodeBytes(response,Base64.DONT_BREAK_LINES);
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if(authenticationText.equals("")) {
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authenticationText = "=";
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}
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stanza.append("<response xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\">");
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stanza.append(authenticationText);
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stanza.append("</response>");
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// Send the authentication to the server
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getSASLAuthentication().send(stanza.toString());
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}
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protected String getChallengeResponse(byte[] bytes) {
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// Unused, see challengeReceived
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return null;
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}
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}
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/**
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* $RCSfile$
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* $Revision: $
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* $Date: $
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*
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*
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* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smack.sasl;
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import javax.security.sasl.*;
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import java.util.*;
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import java.io.IOException;
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import org.jivesoftware.smack.SASLAuthentication;
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import org.jivesoftware.smack.util.Base64;
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/**
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* Implementation of the SASL GSSAPI mechanisn
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*
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*
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* @author Jay Kline
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*/
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public class SASLGSSAPIMechanism extends SASLMechanism {
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private static final String protocol = "xmpp";
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private static final String[] mechanisms = {"GSSAPI"};
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private SaslClient sc;
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public SASLGSSAPIMechanism(SASLAuthentication saslAuthentication) {
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super(saslAuthentication);
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System.setProperty("java.security.krb5.debug","true");
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System.setProperty("javax.security.auth.useSubjectCredsOnly","false");
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System.setProperty("java.security.auth.login.config","gss.conf");
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}
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protected String getName() {
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return "GSSAPI";
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}
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/**
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* Builds and sends the <tt>auth</tt> stanza to the server.
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* This overrides from the abstract class because the initial token
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* needed for GSSAPI is binary, and not safe to put in a string, thus
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* getAuthenticationText() cannot be used.
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*
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* @param username the username of the user being authenticated.
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* @param host the hostname where the user account resides.
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* @param password the password of the user (ignored for GSSAPI)
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* @throws IOException If a network error occures while authenticating.
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*/
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public void authenticate(String username, String host, String password) throws IOException {
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// Build the authentication stanza encoding the authentication text
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StringBuffer stanza = new StringBuffer();
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Map props = new HashMap();
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sc = Sasl.createSaslClient(mechanisms, username, protocol, host, props, null);
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stanza.append("<auth mechanism=\"").append(getName());
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stanza.append("\" xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\">");
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if(sc.hasInitialResponse()) {
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byte[] response = sc.evaluateChallenge(new byte[0]);
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String authenticationText = Base64.encodeBytes(response,Base64.DONT_BREAK_LINES);
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if(authenticationText != null && !authenticationText.equals("")) {
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stanza.append(authenticationText);
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}
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}
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stanza.append("</auth>");
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// Send the authentication to the server
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getSASLAuthentication().send(stanza.toString());
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}
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protected String getAuthenticationText(String username, String host, String password) {
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// Unused, see authenticate
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return null;
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}
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/**
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* The server is challenging the SASL mechanism for the stanza he just sent. Send a
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* response to the server's challenge. This overrieds from the abstract class because the
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* tokens needed for GSSAPI are binary, and not safe to put in a string, thus
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* getChallengeResponse() cannot be used.
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*
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* @param challenge a base64 encoded string representing the challenge.
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*/
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public void challengeReceived(String challenge) throws IOException {
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// Build the challenge response stanza encoding the response text
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StringBuffer stanza = new StringBuffer();
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byte response[];
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if(challenge != null) {
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response = sc.evaluateChallenge(Base64.decode(challenge));
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} else {
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response = sc.evaluateChallenge(null);
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}
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String authenticationText = Base64.encodeBytes(response,Base64.DONT_BREAK_LINES);
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if(authenticationText.equals("")) {
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authenticationText = "=";
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}
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stanza.append("<response xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\">");
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stanza.append(authenticationText);
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stanza.append("</response>");
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// Send the authentication to the server
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getSASLAuthentication().send(stanza.toString());
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}
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protected String getChallengeResponse(byte[] bytes) {
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// Unused, see challengeReceived
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return null;
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}
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}
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