/*
* Copyright 2004,2005 The Apache Software Foundation.
*
* 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.apache.rampart;
import org.apache.rahas.EncryptedKeyToken;
import org.apache.rahas.Token;
import org.apache.rahas.TokenStorage;
import org.apache.rahas.TrustException;
import org.apache.ws.security.WSPasswordCallback;
import org.w3c.dom.Element;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.UnsupportedCallbackException;
import java.io.IOException;
public class TokenCallbackHandler implements CallbackHandler {
private TokenStorage store;
private CallbackHandler handler;
public TokenCallbackHandler(TokenStorage store, CallbackHandler handler) {
this.store = store;
this.handler = handler;
}
public void handle(Callback[] callbacks)
throws IOException, UnsupportedCallbackException {
for (int i = 0; i < callbacks.length; i++) {
if (callbacks[i] instanceof WSPasswordCallback) {
WSPasswordCallback pc = (WSPasswordCallback) callbacks[i];
String id = pc.getIdentifer();
if((pc.getUsage() == WSPasswordCallback.SECURITY_CONTEXT_TOKEN ||
pc.getUsage() == WSPasswordCallback.CUSTOM_TOKEN) &&
this.store != null) {
Token tok;
try {
//Pick up the token from the token store
tok = this.store.getToken(id);
if(tok != null) {
//Get the secret and set it in the callback object
pc.setKey(tok.getSecret());
pc.setCustomToken((Element)tok.getToken());
}
} catch (Exception e) {
e.printStackTrace();
throw new IOException(e.getMessage());
}
} else if (pc.getUsage() == WSPasswordCallback.ENCRYPTED_KEY_TOKEN){
try {
String[] tokenIdentifiers = this.store.getTokenIdentifiers();
Token tok;
for (int j = 0 ; j < tokenIdentifiers.length ; j++) {
tok = this.store.getToken(tokenIdentifiers[j]);
if (tok instanceof EncryptedKeyToken &&
((EncryptedKeyToken)tok).getSHA1().equals(id)){
pc.setKey(tok.getSecret());
pc.setCustomToken((Element)tok.getToken());
}
}
} catch (TrustException e) {
e.printStackTrace();
throw new IOException(e.getMessage());
}
} else {
//Handle other types of callbacks with the usual handler
if(this.handler != null) {
handler.handle(new Callback[]{pc});
}
}
} else {
throw new UnsupportedCallbackException(callbacks[i],
"Unrecognized Callback");
}
}
}
}