mirror of
https://codeberg.org/Mercury-IM/Smack
synced 2024-08-28 11:50:28 +02:00
git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/branches/smack_3_3_0@13620 b35dd754-fafc-0310-a699-88a17e54d16e
405 lines
16 KiB
Java
405 lines
16 KiB
Java
/**
|
|
* $RCSfile$
|
|
* $Revision$
|
|
* $Date$
|
|
*
|
|
* Copyright 2003-2007 Jive Software.
|
|
*
|
|
* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
package org.jivesoftware.smack.sasl;
|
|
|
|
import org.jivesoftware.smack.XMPPException;
|
|
import org.jivesoftware.smack.SASLAuthentication;
|
|
import org.jivesoftware.smack.packet.Packet;
|
|
import org.jivesoftware.smack.util.StringUtils;
|
|
|
|
import java.io.IOException;
|
|
import java.util.Map;
|
|
import java.util.HashMap;
|
|
import javax.security.auth.callback.CallbackHandler;
|
|
import javax.security.auth.callback.UnsupportedCallbackException;
|
|
import javax.security.auth.callback.Callback;
|
|
import javax.security.auth.callback.NameCallback;
|
|
import javax.security.auth.callback.PasswordCallback;
|
|
import javax.security.sasl.RealmCallback;
|
|
import javax.security.sasl.RealmChoiceCallback;
|
|
import javax.security.sasl.Sasl;
|
|
import javax.security.sasl.SaslClient;
|
|
import javax.security.sasl.SaslException;
|
|
|
|
/**
|
|
* Base class for SASL mechanisms. Subclasses must implement these methods:
|
|
* <ul>
|
|
* <li>{@link #getName()} -- returns the common name of the SASL mechanism.</li>
|
|
* </ul>
|
|
* Subclasses will likely want to implement their own versions of these mthods:
|
|
* <li>{@link #authenticate(String, String, String)} -- Initiate authentication stanza using the
|
|
* deprecated method.</li>
|
|
* <li>{@link #authenticate(String, String, CallbackHandler)} -- Initiate authentication stanza
|
|
* using the CallbackHandler method.</li>
|
|
* <li>{@link #challengeReceived(String)} -- Handle a challenge from the server.</li>
|
|
* </ul>
|
|
*
|
|
* Basic XMPP SASL authentication steps:
|
|
* 1. Client authentication initialization, stanza sent to the server (Base64 encoded):
|
|
* <auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl' mechanism='DIGEST-MD5'/>
|
|
* 2. Server sends back to the client the challenge response (Base64 encoded)
|
|
* sample:
|
|
* realm=<sasl server realm>,nonce="OA6MG9tEQGm2hh",qop="auth",charset=utf-8,algorithm=md5-sess
|
|
* 3. The client responds back to the server (Base 64 encoded):
|
|
* sample:
|
|
* username=<userid>,realm=<sasl server realm from above>,nonce="OA6MG9tEQGm2hh",
|
|
* cnonce="OA6MHXh6VqTrRk",nc=00000001,qop=auth,
|
|
* digest-uri=<digesturi>,
|
|
* response=d388dad90d4bbd760a152321f2143af7,
|
|
* charset=utf-8,
|
|
* authzid=<id>
|
|
* 4. The server evaluates if the user is present and contained in the REALM
|
|
* if successful it sends: <response xmlns='urn:ietf:params:xml:ns:xmpp-sasl'/> (Base64 encoded)
|
|
* if not successful it sends:
|
|
* sample:
|
|
* <challenge xmlns='urn:ietf:params:xml:ns:xmpp-sasl'>
|
|
* cnNwYXV0aD1lYTQwZjYwMzM1YzQyN2I1NTI3Yjg0ZGJhYmNkZmZmZA==
|
|
* </challenge>
|
|
*
|
|
|
|
*
|
|
* @author Jay Kline
|
|
*/
|
|
public abstract class SASLMechanism implements CallbackHandler {
|
|
|
|
private SASLAuthentication saslAuthentication;
|
|
protected SaslClient sc;
|
|
protected String authenticationId;
|
|
protected String password;
|
|
protected String hostname;
|
|
|
|
public SASLMechanism(SASLAuthentication saslAuthentication) {
|
|
this.saslAuthentication = saslAuthentication;
|
|
}
|
|
|
|
/**
|
|
* Builds and sends the <tt>auth</tt> stanza to the server. Note that this method of
|
|
* authentication is not recommended, since it is very inflexable. Use
|
|
* {@link #authenticate(String, String, CallbackHandler)} whenever possible.
|
|
*
|
|
* Explanation of auth stanza:
|
|
*
|
|
* The client authentication stanza needs to include the digest-uri of the form: xmpp/serverName
|
|
* From RFC-2831:
|
|
* digest-uri = "digest-uri" "=" digest-uri-value
|
|
* digest-uri-value = serv-type "/" host [ "/" serv-name ]
|
|
*
|
|
* digest-uri:
|
|
* Indicates the principal name of the service with which the client
|
|
* wishes to connect, formed from the serv-type, host, and serv-name.
|
|
* For example, the FTP service
|
|
* on "ftp.example.com" would have a "digest-uri" value of "ftp/ftp.example.com"; the SMTP
|
|
* server from the example above would have a "digest-uri" value of
|
|
* "smtp/mail3.example.com/example.com".
|
|
*
|
|
* host:
|
|
* The DNS host name or IP address for the service requested. The DNS host name
|
|
* must be the fully-qualified canonical name of the host. The DNS host name is the
|
|
* preferred form; see notes on server processing of the digest-uri.
|
|
*
|
|
* serv-name:
|
|
* Indicates the name of the service if it is replicated. The service is
|
|
* considered to be replicated if the client's service-location process involves resolution
|
|
* using standard DNS lookup operations, and if these operations involve DNS records (such
|
|
* as SRV, or MX) which resolve one DNS name into a set of other DNS names. In this case,
|
|
* the initial name used by the client is the "serv-name", and the final name is the "host"
|
|
* component. For example, the incoming mail service for "example.com" may be replicated
|
|
* through the use of MX records stored in the DNS, one of which points at an SMTP server
|
|
* called "mail3.example.com"; it's "serv-name" would be "example.com", it's "host" would be
|
|
* "mail3.example.com". If the service is not replicated, or the serv-name is identical to
|
|
* the host, then the serv-name component MUST be omitted
|
|
*
|
|
* digest-uri verification is needed for ejabberd 2.0.3 and higher
|
|
*
|
|
* @param username the username of the user being authenticated.
|
|
* @param host the hostname where the user account resides.
|
|
* @param serviceName the xmpp service location - used by the SASL client in digest-uri creation
|
|
* serviceName format is: host [ "/" serv-name ] as per RFC-2831
|
|
* @param password the password for this account.
|
|
* @throws IOException If a network error occurs while authenticating.
|
|
* @throws XMPPException If a protocol error occurs or the user is not authenticated.
|
|
*/
|
|
public void authenticate(String username, String host, String serviceName, String password) throws IOException, XMPPException {
|
|
//Since we were not provided with a CallbackHandler, we will use our own with the given
|
|
//information
|
|
|
|
//Set the authenticationID as the username, since they must be the same in this case.
|
|
this.authenticationId = username;
|
|
this.password = password;
|
|
this.hostname = host;
|
|
|
|
String[] mechanisms = { getName() };
|
|
Map<String,String> props = new HashMap<String,String>();
|
|
sc = Sasl.createSaslClient(mechanisms, username, "xmpp", serviceName, props, this);
|
|
authenticate();
|
|
}
|
|
|
|
/**
|
|
* Same as {@link #authenticate(String, String, String, String)}, but with the hostname used as the serviceName.
|
|
* <p>
|
|
* Kept for backward compatibility only.
|
|
*
|
|
* @param username the username of the user being authenticated.
|
|
* @param host the hostname where the user account resides.
|
|
* @param password the password for this account.
|
|
* @throws IOException If a network error occurs while authenticating.
|
|
* @throws XMPPException If a protocol error occurs or the user is not authenticated.
|
|
* @deprecated Please use {@link #authenticate(String, String, String, String)} instead.
|
|
*/
|
|
public void authenticate(String username, String host, String password) throws IOException, XMPPException {
|
|
authenticate(username, host, host, password);
|
|
}
|
|
|
|
/**
|
|
* Builds and sends the <tt>auth</tt> stanza to the server. The callback handler will handle
|
|
* any additional information, such as the authentication ID or realm, if it is needed.
|
|
*
|
|
* @param username the username of the user being authenticated.
|
|
* @param host the hostname where the user account resides.
|
|
* @param cbh the CallbackHandler to obtain user information.
|
|
* @throws IOException If a network error occures while authenticating.
|
|
* @throws XMPPException If a protocol error occurs or the user is not authenticated.
|
|
*/
|
|
public void authenticate(String username, String host, CallbackHandler cbh) throws IOException, XMPPException {
|
|
String[] mechanisms = { getName() };
|
|
Map<String,String> props = new HashMap<String,String>();
|
|
sc = Sasl.createSaslClient(mechanisms, username, "xmpp", host, props, cbh);
|
|
authenticate();
|
|
}
|
|
|
|
protected void authenticate() throws IOException, XMPPException {
|
|
String authenticationText = null;
|
|
try {
|
|
if(sc.hasInitialResponse()) {
|
|
byte[] response = sc.evaluateChallenge(new byte[0]);
|
|
authenticationText = StringUtils.encodeBase64(response, false);
|
|
}
|
|
} catch (SaslException e) {
|
|
throw new XMPPException("SASL authentication failed", e);
|
|
}
|
|
|
|
// Send the authentication to the server
|
|
getSASLAuthentication().send(new AuthMechanism(getName(), authenticationText));
|
|
}
|
|
|
|
|
|
/**
|
|
* The server is challenging the SASL mechanism for the stanza he just sent. Send a
|
|
* response to the server's challenge.
|
|
*
|
|
* @param challenge a base64 encoded string representing the challenge.
|
|
* @throws IOException if an exception sending the response occurs.
|
|
*/
|
|
public void challengeReceived(String challenge) throws IOException {
|
|
byte response[];
|
|
if(challenge != null) {
|
|
response = sc.evaluateChallenge(StringUtils.decodeBase64(challenge));
|
|
} else {
|
|
response = sc.evaluateChallenge(new byte[0]);
|
|
}
|
|
|
|
Packet responseStanza;
|
|
if (response == null) {
|
|
responseStanza = new Response();
|
|
}
|
|
else {
|
|
responseStanza = new Response(StringUtils.encodeBase64(response, false));
|
|
}
|
|
|
|
// Send the authentication to the server
|
|
getSASLAuthentication().send(responseStanza);
|
|
}
|
|
|
|
/**
|
|
* Returns the common name of the SASL mechanism. E.g.: PLAIN, DIGEST-MD5 or GSSAPI.
|
|
*
|
|
* @return the common name of the SASL mechanism.
|
|
*/
|
|
protected abstract String getName();
|
|
|
|
|
|
protected SASLAuthentication getSASLAuthentication() {
|
|
return saslAuthentication;
|
|
}
|
|
|
|
/**
|
|
*
|
|
*/
|
|
public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
|
|
for (int i = 0; i < callbacks.length; i++) {
|
|
if (callbacks[i] instanceof NameCallback) {
|
|
NameCallback ncb = (NameCallback)callbacks[i];
|
|
ncb.setName(authenticationId);
|
|
} else if(callbacks[i] instanceof PasswordCallback) {
|
|
PasswordCallback pcb = (PasswordCallback)callbacks[i];
|
|
pcb.setPassword(password.toCharArray());
|
|
} else if(callbacks[i] instanceof RealmCallback) {
|
|
RealmCallback rcb = (RealmCallback)callbacks[i];
|
|
//Retrieve the REALM from the challenge response that the server returned when the client initiated the authentication
|
|
//exchange. If this value is not null or empty, *this value* has to be sent back to the server in the client's response
|
|
//to the server's challenge
|
|
String text = rcb.getDefaultText();
|
|
//The SASL client (sc) created in smack uses rcb.getText when creating the negotiatedRealm to send it back to the server
|
|
//Make sure that this value matches the server's realm
|
|
rcb.setText(text);
|
|
} else if(callbacks[i] instanceof RealmChoiceCallback){
|
|
//unused
|
|
//RealmChoiceCallback rccb = (RealmChoiceCallback)callbacks[i];
|
|
} else {
|
|
throw new UnsupportedCallbackException(callbacks[i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Initiating SASL authentication by select a mechanism.
|
|
*/
|
|
public class AuthMechanism extends Packet {
|
|
final private String name;
|
|
final private String authenticationText;
|
|
|
|
public AuthMechanism(String name, String authenticationText) {
|
|
if (name == null) {
|
|
throw new NullPointerException("SASL mechanism name shouldn't be null.");
|
|
}
|
|
this.name = name;
|
|
this.authenticationText = authenticationText;
|
|
}
|
|
|
|
public String toXML() {
|
|
StringBuilder stanza = new StringBuilder();
|
|
stanza.append("<auth mechanism=\"").append(name);
|
|
stanza.append("\" xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\">");
|
|
if (authenticationText != null &&
|
|
authenticationText.trim().length() > 0) {
|
|
stanza.append(authenticationText);
|
|
}
|
|
stanza.append("</auth>");
|
|
return stanza.toString();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* A SASL challenge stanza.
|
|
*/
|
|
public static class Challenge extends Packet {
|
|
final private String data;
|
|
|
|
public Challenge(String data) {
|
|
this.data = data;
|
|
}
|
|
|
|
public String toXML() {
|
|
StringBuilder stanza = new StringBuilder();
|
|
stanza.append("<challenge xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\">");
|
|
if (data != null &&
|
|
data.trim().length() > 0) {
|
|
stanza.append(data);
|
|
}
|
|
stanza.append("</challenge>");
|
|
return stanza.toString();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* A SASL response stanza.
|
|
*/
|
|
public class Response extends Packet {
|
|
final private String authenticationText;
|
|
|
|
public Response() {
|
|
authenticationText = null;
|
|
}
|
|
|
|
public Response(String authenticationText) {
|
|
if (authenticationText == null || authenticationText.trim().length() == 0) {
|
|
this.authenticationText = null;
|
|
}
|
|
else {
|
|
this.authenticationText = authenticationText;
|
|
}
|
|
}
|
|
|
|
public String toXML() {
|
|
StringBuilder stanza = new StringBuilder();
|
|
stanza.append("<response xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\">");
|
|
if (authenticationText != null) {
|
|
stanza.append(authenticationText);
|
|
}
|
|
stanza.append("</response>");
|
|
return stanza.toString();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* A SASL success stanza.
|
|
*/
|
|
public static class Success extends Packet {
|
|
final private String data;
|
|
|
|
public Success(String data) {
|
|
this.data = data;
|
|
}
|
|
|
|
public String toXML() {
|
|
StringBuilder stanza = new StringBuilder();
|
|
stanza.append("<success xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\">");
|
|
if (data != null &&
|
|
data.trim().length() > 0) {
|
|
stanza.append(data);
|
|
}
|
|
stanza.append("</success>");
|
|
return stanza.toString();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* A SASL failure stanza.
|
|
*/
|
|
public static class Failure extends Packet {
|
|
final private String condition;
|
|
|
|
public Failure(String condition) {
|
|
this.condition = condition;
|
|
}
|
|
|
|
/**
|
|
* Get the SASL related error condition.
|
|
*
|
|
* @return the SASL related error condition.
|
|
*/
|
|
public String getCondition() {
|
|
return condition;
|
|
}
|
|
|
|
public String toXML() {
|
|
StringBuilder stanza = new StringBuilder();
|
|
stanza.append("<failure xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\">");
|
|
if (condition != null &&
|
|
condition.trim().length() > 0) {
|
|
stanza.append("<").append(condition).append("/>");
|
|
}
|
|
stanza.append("</failure>");
|
|
return stanza.toString();
|
|
}
|
|
}
|
|
}
|