mirror of git://gcc.gnu.org/git/gcc.git
296 lines
10 KiB
Java
296 lines
10 KiB
Java
/* AbstractCallbackHandler.java --
|
|
Copyright (C) 2005, 2006 Free Software Foundation, Inc.
|
|
|
|
This file is a part of GNU Classpath.
|
|
|
|
GNU Classpath is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or (at
|
|
your option) any later version.
|
|
|
|
GNU Classpath is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GNU Classpath; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
|
|
USA
|
|
|
|
Linking this library statically or dynamically with other modules is
|
|
making a combined work based on this library. Thus, the terms and
|
|
conditions of the GNU General Public License cover the whole
|
|
combination.
|
|
|
|
As a special exception, the copyright holders of this library give you
|
|
permission to link this library with independent modules to produce an
|
|
executable, regardless of the license terms of these independent
|
|
modules, and to copy and distribute the resulting executable under
|
|
terms of your choice, provided that you also meet, for each linked
|
|
independent module, the terms and conditions of the license of that
|
|
module. An independent module is a module which is not derived from
|
|
or based on this library. If you modify this library, you may extend
|
|
this exception to your version of the library, but you are not
|
|
obligated to do so. If you do not wish to do so, delete this
|
|
exception statement from your version. */
|
|
|
|
|
|
package gnu.javax.security.auth.callback;
|
|
|
|
import gnu.java.security.Engine;
|
|
|
|
import java.io.IOException;
|
|
import java.lang.reflect.InvocationTargetException;
|
|
import java.util.PropertyResourceBundle;
|
|
import java.util.ResourceBundle;
|
|
|
|
import java.security.NoSuchAlgorithmException;
|
|
import java.security.NoSuchProviderException;
|
|
import java.security.Provider;
|
|
import java.security.Security;
|
|
|
|
import javax.security.auth.callback.Callback;
|
|
import javax.security.auth.callback.CallbackHandler;
|
|
import javax.security.auth.callback.ChoiceCallback;
|
|
import javax.security.auth.callback.ConfirmationCallback;
|
|
import javax.security.auth.callback.LanguageCallback;
|
|
import javax.security.auth.callback.NameCallback;
|
|
import javax.security.auth.callback.PasswordCallback;
|
|
import javax.security.auth.callback.TextInputCallback;
|
|
import javax.security.auth.callback.TextOutputCallback;
|
|
import javax.security.auth.callback.UnsupportedCallbackException;
|
|
|
|
public abstract class AbstractCallbackHandler implements CallbackHandler
|
|
{
|
|
|
|
// Fields.
|
|
// -------------------------------------------------------------------------
|
|
|
|
private static final String SERVICE = "CallbackHandler";
|
|
|
|
protected final ResourceBundle messages;
|
|
|
|
private final String name;
|
|
|
|
// Constructors.
|
|
// -------------------------------------------------------------------------
|
|
|
|
protected AbstractCallbackHandler (final String name)
|
|
{
|
|
super();
|
|
messages = PropertyResourceBundle.getBundle("gnu/javax/security/auth/callback/MessagesBundle");
|
|
this.name = name;
|
|
}
|
|
|
|
/**
|
|
* Create an instance of <code>CallbackHandler</code> of the designated
|
|
* <code>type</code> from the first Security Provider which offers it.
|
|
*
|
|
* @param type the type of callback handler to create.
|
|
* @return a newly created instance of <code>ClassbackHandler</code>.
|
|
* @throws NoSuchAlgorithmException if no security provider is found to offer
|
|
* an implementation of <code>CallbackHandler</code> of the
|
|
* designated <code>type</code>.
|
|
*/
|
|
public static CallbackHandler getInstance(String type)
|
|
throws NoSuchAlgorithmException
|
|
{
|
|
Provider[] p = Security.getProviders();
|
|
NoSuchAlgorithmException lastException = null;
|
|
for (int i = 0; i < p.length; i++)
|
|
try
|
|
{
|
|
return getInstance(type, p[i]);
|
|
}
|
|
catch (NoSuchAlgorithmException x)
|
|
{
|
|
lastException = x;
|
|
}
|
|
if (lastException != null)
|
|
throw lastException;
|
|
throw new NoSuchAlgorithmException(type);
|
|
}
|
|
|
|
/**
|
|
* Create an instance of <code>CallbackHandler</code> of the designated
|
|
* <code>type</code> from the named security <code>provider</code>.
|
|
*
|
|
* @param type the type of callback handler to create.
|
|
* @param provider a named security provider to use.
|
|
* @return a newly created instance of <code>ClassbackHandler</code>.
|
|
* @throws NoSuchAlgorithmException if no security provider is found to offer
|
|
* an implementation of <code>CallbackHandler</code> of the
|
|
* designated <code>type</code>.
|
|
* @throws IllegalArgumentException if either <code>type</code> or
|
|
* <code>provider</code> is <code>null</code>, or if
|
|
* <code>type</code> is an empty string.
|
|
*/
|
|
public static CallbackHandler getInstance(String type, String provider)
|
|
throws NoSuchAlgorithmException, NoSuchProviderException
|
|
{
|
|
if (provider == null)
|
|
throw new IllegalArgumentException("provider MUST NOT be null");
|
|
Provider p = Security.getProvider(provider);
|
|
if (p == null)
|
|
throw new NoSuchProviderException(provider);
|
|
return getInstance(type, p);
|
|
}
|
|
|
|
/**
|
|
* Create an instance of <code>CallbackHandler</code> of the designated
|
|
* <code>type</code> from the designated security <code>provider</code>.
|
|
*
|
|
* @param type the type of callback handler to create.
|
|
* @param provider a security provider to use.
|
|
* @return a newly created instance of <code>ClassbackHandler</code>.
|
|
* @throws NoSuchAlgorithmException if no security provider is found to offer
|
|
* an implementation of <code>CallbackHandler</code> of the
|
|
* designated <code>type</code>.
|
|
* @throws IllegalArgumentException if either <code>type</code> or
|
|
* <code>provider</code> is <code>null</code>, or if
|
|
* <code>type</code> is an empty string.
|
|
*/
|
|
public static CallbackHandler getInstance(String type, Provider provider)
|
|
throws NoSuchAlgorithmException
|
|
{
|
|
StringBuilder sb = new StringBuilder("CallbackHandler of type [")
|
|
.append(type).append("] from provider[")
|
|
.append(provider).append("] could not be created");
|
|
Throwable cause;
|
|
try
|
|
{
|
|
return (CallbackHandler) Engine.getInstance(SERVICE, type, provider);
|
|
}
|
|
catch (InvocationTargetException x)
|
|
{
|
|
cause = x.getCause();
|
|
if (cause instanceof NoSuchAlgorithmException)
|
|
throw (NoSuchAlgorithmException) cause;
|
|
if (cause == null)
|
|
cause = x;
|
|
}
|
|
catch (ClassCastException x)
|
|
{
|
|
cause = x;
|
|
}
|
|
NoSuchAlgorithmException x = new NoSuchAlgorithmException(sb.toString());
|
|
x.initCause(cause);
|
|
throw x;
|
|
}
|
|
|
|
public void handle(Callback[] callbacks)
|
|
throws IOException, UnsupportedCallbackException
|
|
{
|
|
if (callbacks == null)
|
|
throw new NullPointerException();
|
|
for (int i = 0; i < callbacks.length; i++)
|
|
{
|
|
if (callbacks[i] == null)
|
|
continue;
|
|
if (callbacks[i] instanceof ChoiceCallback)
|
|
handleChoice((ChoiceCallback) callbacks[i]);
|
|
else if (callbacks[i] instanceof ConfirmationCallback)
|
|
handleConfirmation((ConfirmationCallback) callbacks[i]);
|
|
else if (callbacks[i] instanceof LanguageCallback)
|
|
handleLanguage((LanguageCallback) callbacks[i]);
|
|
else if (callbacks[i] instanceof NameCallback)
|
|
handleName((NameCallback) callbacks[i]);
|
|
else if (callbacks[i] instanceof PasswordCallback)
|
|
handlePassword((PasswordCallback) callbacks[i]);
|
|
else if (callbacks[i] instanceof TextInputCallback)
|
|
handleTextInput((TextInputCallback) callbacks[i]);
|
|
else if (callbacks[i] instanceof TextOutputCallback)
|
|
handleTextOutput((TextOutputCallback) callbacks[i]);
|
|
else
|
|
handleOther(callbacks[i]);
|
|
}
|
|
}
|
|
|
|
public final String getName ()
|
|
{
|
|
return name;
|
|
}
|
|
|
|
// Abstract methods.
|
|
// -------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Handles a {@link ChoiceCallback}.
|
|
*
|
|
* @param callback The choice callback.
|
|
* @throws IOException If an I/O error occurs.
|
|
*/
|
|
protected abstract void handleChoice(ChoiceCallback callback)
|
|
throws IOException;
|
|
|
|
/**
|
|
* Handles a {@link ConfirmationCallback}.
|
|
*
|
|
* @param callback The confirmation callback.
|
|
* @throws IOException If an I/O error occurs.
|
|
*/
|
|
protected abstract void handleConfirmation(ConfirmationCallback callback)
|
|
throws IOException;
|
|
|
|
/**
|
|
* Handles a {@link LanguageCallback}.
|
|
*
|
|
* @param callback The language callback.
|
|
* @throws IOException If an I/O error occurs.
|
|
*/
|
|
protected abstract void handleLanguage(LanguageCallback callback)
|
|
throws IOException;
|
|
|
|
/**
|
|
* Handles a {@link NameCallback}.
|
|
*
|
|
* @param callback The name callback.
|
|
* @throws IOException If an I/O error occurs.
|
|
*/
|
|
protected abstract void handleName(NameCallback callback)
|
|
throws IOException;
|
|
|
|
/**
|
|
* Handles a {@link PasswordCallback}.
|
|
*
|
|
* @param callback The password callback.
|
|
* @throws IOException If an I/O error occurs.
|
|
*/
|
|
protected abstract void handlePassword(PasswordCallback callback)
|
|
throws IOException;
|
|
|
|
/**
|
|
* Handles a {@link TextInputCallback}.
|
|
*
|
|
* @param callback The text input callback.
|
|
* @throws IOException If an I/O error occurs.
|
|
*/
|
|
protected abstract void handleTextInput(TextInputCallback callback)
|
|
throws IOException;
|
|
|
|
/**
|
|
* Handles a {@link TextOutputCallback}.
|
|
*
|
|
* @param callback The text output callback.
|
|
* @throws IOException If an I/O error occurs.
|
|
*/
|
|
protected abstract void handleTextOutput(TextOutputCallback callback)
|
|
throws IOException;
|
|
|
|
/**
|
|
* Handles an unknown callback. The default implementation simply throws
|
|
* an {@link UnsupportedCallbackException}.
|
|
*
|
|
* @param callback The callback to handle.
|
|
* @throws IOException If an I/O error occurs.
|
|
* @throws UnsupportedCallbackException If the specified callback is not
|
|
* supported.
|
|
*/
|
|
protected void handleOther(Callback callback)
|
|
throws IOException, UnsupportedCallbackException
|
|
{
|
|
throw new UnsupportedCallbackException(callback);
|
|
}
|
|
}
|