I've made the recommended change and recompiled the JARs, but I'm still getting this same error when trying to connect to Facebook chat. Would you mind sharing some snippets of code? I think I have everything (server/port/etc) correct, but it's not authenticating.

EDIT: Making the changes in this thread:

http://www.igniterealtime.org/community/thread/35976

and recompiling seems to have fixed my problem. Thanks a ton for this thread!

Hey, I'm having a real trouble connecting to Facebook chat via asmack... with smack 3.1 i could connect by using the MySASLMD5DigestMechanism that a member posted here, but since I can't use javax.security on a Android environment I needed to use the asmack lib, that as a built in SASLM5DigestMechanism. Whenever I try to use it i get a no class found exception... this is my code for connecting

import java.util.logging.Level;
import java.util.logging.Logger;
import org.jivesoftware.smack.ConnectionConfiguration;
import org.jivesoftware.smack.SASLAuthentication;
import org.jivesoftware.smack.XMPPConnection;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smack.sasl.SASLDigestMD5Mechanism;

/**
*
* @author Pedro
*/
public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {

        SASLAuthentication.registerSASLMechanism("DIGEST-MD5", SASLDigestMD5Mechanism.class);
        ConnectionConfiguration connConfig = new ConnectionConfiguration("chat.facebook.com");

        XMPPConnection connection = new XMPPConnection(connConfig);

        try {
            connection.connect();
            connection.login("BentoElGaton", "UwishUknew:P");
        } catch (XMPPException ex) {
            Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
        }

this is the result of build and run......

run:
Exception in thread "main" java.lang.NoClassDefFoundError: org/xmlpull/v1/XmlPullParser
        at org.jivesoftware.smack.Connection.<clinit>(Connection.java:118)
        at org.jivesoftware.smack.ConnectionConfiguration.<init>(ConnectionConfiguration.j ava:73)
        at Threads.Main.main(Main.java:30)
Caused by: java.lang.ClassNotFoundException: org.xmlpull.v1.XmlPullParser
        at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
        ... 3 more
Java Result: 1
BUILD SUCCESSFUL (total time: 0 seconds)

Please help, since I don't understand anything about security, thanks

I'm working on desktop with the asmack lib...

hello kees...i had this problem just a few days ago...now i have solved it & my app is working too fine!

u dont need SASL md5 for google.U need it only for facebook.here's the code snippet:

try
        {

            if(frameName=="Facebook")
            {

                SASLAuthentication.registerSASLMechanism("DIGEST-MD5",MySASLDigestMD5Mechanism. class);

                config = new ConnectionConfiguration("chat.facebook.com",5222);
                config.setSASLAuthenticationEnabled(true);
                config.setRosterLoadedAtLogin (true);
            }
            if(frameName=="gTalk")
            {
                config = new ConnectionConfiguration("talk.google.com",5222, "gmail.com");
                config.setSASLAuthenticationEnabled(false);
                config.setRosterLoadedAtLogin (true);
            }

}

catch(Exception ex)

{ex.printStackTrace();}

////ur code proceeds

if u do ur code in jcreator or netbeans u have to include this jar SASLin ur project.

Hello, I'm just an amateur with smack api, and I'm trying hard to connect to facebook chat using x-facebook platform.

I am using the custom SASL mechanism class for facebook authentication described above. But getting errors, actually I do not know exactly how to perform this.

public class SASLXFacebookPlatformMechanism extends SASLMechanism {
    public static final String NAME = "X-FACEBOOK-PLATFORM";
 
 
    private String apiKey = "";
    private String applicationSecret = "";
    private String sessionKey = "";
 
 
    /**
     * Constructor.
     */
    public SASLXFacebookPlatformMechanism1(SASLAuthentication saslAuthentication) {
        super(saslAuthentication);
    }
 
    @Override
    protected void authenticate() throws IOException, XMPPException {
        StringBuilder stanza = new StringBuilder();
        stanza.append("<auth mechanism=\"").append(getName());
        stanza.append("\" xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\">");
        stanza.append("</auth>");
 
        // Send the authentication to the server
        getSASLAuthentication().send(stanza.toString());
    }
 
    @Override
    public void authenticate(String apiKeyAndSessionKey, String host, String applicationSecret) throws IOException, XMPPException {
        if (apiKeyAndSessionKey == null || applicationSecret == null)
            throw new IllegalArgumentException("Invalid parameters");
 
        String[] keyArray = apiKeyAndSessionKey.split("\\|", 2);
        if (keyArray.length < 2)
            throw new IllegalArgumentException("API key or session key is not present");
 
        this.apiKey = keyArray[0];
        this.applicationSecret = applicationSecret;
        this.sessionKey = keyArray[1];
 
        this.authenticationId = sessionKey;
        this.password = applicationSecret;
        this.hostname = host;
 
        String[] mechanisms = { "DIGEST-MD5" };
        Map<String, String> props = new HashMap<String, String>();
        this.sc = Sasl.createSaslClient(mechanisms, null, "xmpp", host, props, this);
        authenticate();
    }
 
    @Override
    public void authenticate(String username, String host, CallbackHandler cbh) throws IOException, XMPPException {
        String[] mechanisms = { "DIGEST-MD5" };
        Map<String, String> props = new HashMap<String, String>();
        this.sc = Sasl.createSaslClient(mechanisms, null, "xmpp", host, props, cbh);
        authenticate();
    }
 
    @Override
    protected String getName() {
        return NAME;
    }
 
    @Override
    public void challengeReceived(String challenge) throws IOException {
        StringBuilder stanza = new StringBuilder();
        byte[] response = null;
 
        if (challenge != null) {
            String decodedChallenge = new String(Base64.decode(challenge));
            Map<String, String> parameters = getQueryMap(decodedChallenge);
 
            String version = "1.0";
            String nonce = parameters.get("nonce");
            String method = parameters.get("method");
 
            long callId = new GregorianCalendar().getTimeInMillis() / 1000L;
 
            String sig = "api_key=" + apiKey
                            + "call_id=" + callId
                            + "method=" + method
                            + "nonce=" + nonce
                            + "session_key=" + sessionKey
                            + "v=" + version
                            + applicationSecret;
 
            try {
                sig = md5(sig);
            }
            catch (NoSuchAlgorithmException e) {
                throw new IllegalStateException(e);
            }
 
            String composedResponse = "api_key=" + URLEncoder.encode(apiKey, "utf-8")
                                        + "&call_id=" + callId
                                        + "&method=" + URLEncoder.encode(method, "utf-8")
                                        + "&nonce=" + URLEncoder.encode(nonce, "utf-8")
                                        + "&session_key=" + URLEncoder.encode(sessionKey, "utf-8")
                                        + "&v=" + URLEncoder.encode(version, "utf-8")
                                        + "&sig=" + URLEncoder.encode(sig, "utf-8");
 
            response = composedResponse.getBytes("utf-8");
        }
 
        String authenticationText = "";
 
        if (response != null)
            authenticationText = Base64.encodeBytes(response, Base64.DONT_BREAK_LINES);
 
        stanza.append("<response xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\">");
        stanza.append(authenticationText);
        stanza.append("</response>");
 
        // Send the authentication to the server
        getSASLAuthentication().send(stanza.toString());
    }
 
    private Map<String, String> getQueryMap(String query) {
        Map<String, String> map = new HashMap<String, String>();
        String[] params = query.split("\\&");
 
        for (String param : params) {
            String[] fields = param.split("=", 2);
            map.put(fields[0], (fields.length > 1 ? fields[1] : null));
        }
 
        return map;
    }
 
    private String md5(String text) throws NoSuchAlgorithmException, UnsupportedEncodingException {
        MessageDigest md = MessageDigest.getInstance("MD5");
        md.update(text.getBytes("utf-8"), 0, text.length());
        return convertToHex(md.digest());
    }
 
    private String convertToHex(byte[] data) {
        StringBuilder buf = new StringBuilder();
        int len = data.length;
 
        for (int i = 0; i < len; i++) {
            int halfByte = (data[i] >>> 4) & 0xF;
            int twoHalfs = 0;
 
            do {
                if (0 <= halfByte && halfByte <= 9)
                    buf.append((char) ('0' + halfByte));
                else
                    buf.append((char) ('a' + halfByte - 10));
                halfByte = data[i] & 0xF;
            }
            while (twoHalfs++ < 1);
        }
 
        return buf.toString();
    }
}

So now I have this class, but I don't know where I am doing wrong, may be I'm calling it in wrong manner, here is how I made use of this class.

ConnectionConfiguration config = new ConnectionConfiguration("chat.facebook.com", 5222);
config.setSASLAuthenticationEnabled(true);
config.setDebuggerEnabled(true);
 
SASLAuthentication.registerSASLMechanism(SASLXFacebookPlatformMechanism.NAME, SASLXFacebookPlatformMechanism.class);
SASLAuthentication.supportSASLMechanism(SASLXFacebookPlatformMechanism.NAME, 0); 
 
XMPPConnection connection = new XMPPConnection(config);
try {
    connection.connect();
} catch (XMPPException ex) {
    Logger.getLogger(FB.class.getName()).log(Level.SEVERE, null, ex);
}
SASLXFacebookPlatformMechanism1 mech=new SASLXFacebookPlatformMechanism1(connection.getSASLAuthentication());
try {
    mech.authenticate();
} catch (IOException ex) {
    Logger.getLogger(FB.class.getName()).log(Level.SEVERE, null, ex);
} catch (XMPPException ex) {
    Logger.getLogger(FB.class.getName()).log(Level.SEVERE, null, ex);
}

When I execute this code, I get a NullPointerException

java.lang.NullPointerException
    at org.jivesoftware.smack.SASLAuthentication.challengeReceived(SASLAuthentication.java:514)
    at org.jivesoftware.smack.PacketReader.parsePackets(PacketReader.java:296)
    at org.jivesoftware.smack.PacketReader.access$000(PacketReader.java:43)
    at org.jivesoftware.smack.PacketReader$1.run(PacketReader.java:70)

So to reply to the ORIGINAL discussion at hand, for those who are NOT trying to do X-Facebook, but just DIGEST-MD5, if you seemingly tried EVERYTHING you've found online without any luck like I did for hours while banging my head into the keyboard, I did finally get facebook chat working with asmack.

If you're getting a failed not authorized for DIGEST-MD5 and are using the asmack library try the following:  go to facebook.com/username, make sure you have a username chosen first, then LOGOUT and log back in using ONLY your username and password.  If you're like me, and hate facebook, but somehow found themselves coding a chat client, you might have had an old account when they used to be based on purely email addresses, so technically before doing the above steps, my userid was xxx@email.com@chat.facebook.com which is retarded on facebooks part.

I'm logged into facebook now from my client using only the asmack lib, no custom mysaslmechanism classes or anything.

Hope that helps some of your frustrated devs out there.