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CustomCallbackHandler.java

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package net.threebit.utils.sosc;

import javax.security.auth.*;
import javax.security.auth.callback.*;
import javax.security.auth.login.*;
import org.jboss.security.auth.callback.SecurityAssociationCallback;
import org.jboss.security.SimplePrincipal;

public class CustomCallbackHandler implements CallbackHandler {

        private String userName = null;
        private String password = null;

        public CustomCallbackHandler (String userName, String password) {
                this.userName = userName;
                this.password = password;
        }

        public void handle (Callback[] callbacks) {

                for (int i = 0; i < callbacks.length; i++) {

                        if (callbacks[i] instanceof TextOutputCallback) {

                                // TODO: this callback can probably be ignored?
                                TextOutputCallback toc = (TextOutputCallback)callbacks[i];
                                switch (toc.getMessageType()) {
                                        case TextOutputCallback.INFORMATION:
                                                System.out.println(toc.getMessage());
                                                break;
                                        case TextOutputCallback.ERROR:
                                                System.out.println("ERROR: " + toc.getMessage());
                                                break;
                                        case TextOutputCallback.WARNING:
                                                System.out.println("WARNING: " + toc.getMessage());
                                                break;
                                        default:
                                                throw new RuntimeException("Unsupported message type: " + toc.getMessageType());
                                }

                        } else if (callbacks[i] instanceof NameCallback) {

                                NameCallback nc = (NameCallback) callbacks[i];
                                nc.setName(userName);

                        } else if (callbacks[i] instanceof PasswordCallback) {

                                PasswordCallback pc = (PasswordCallback)callbacks[i];
                                pc.setPassword(password.toCharArray());

                        } else if (callbacks[i] instanceof SecurityAssociationCallback) {

                                SecurityAssociationCallback sac = (SecurityAssociationCallback) callbacks[i];
                                sac.setPrincipal( new SimplePrincipal( userName ));
                                sac.setCredential( password );

                        } else {
                                throw new RuntimeException("Unrecognized Callback: " + callbacks[i]);
                        }
                }
        }

}

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