/*
* JBoss, Home of Professional Open Source
* Copyright 2013 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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.wildfly.security.password.impl;
import java.io.NotSerializableException;
import java.io.ObjectInputStream;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.KeySpec;
import java.util.Arrays;
import javax.security.auth.DestroyFailedException;
import org.wildfly.security.password.interfaces.ClearPassword;
import org.wildfly.security.password.spec.ClearPasswordSpec;
final class ClearPasswordImpl extends AbstractPasswordImpl implements ClearPassword {
private static final long serialVersionUID = -3949572193624333918L;
private char[] password;
ClearPasswordImpl(final char[] password) {
this.password = password;
}
ClearPasswordImpl(ClearPassword clearPassword) {
password = clearPassword.getPassword().clone();
}
public String getAlgorithm() {
return "clear";
}
public char[] getPassword() throws IllegalStateException {
try {
return password.clone();
} catch (NullPointerException ignored) {
throw new IllegalStateException();
}
}
public void destroy() throws DestroyFailedException {
final char[] password = this.password;
this.password = null;
if (password != null) Arrays.fill(password, '\0');
}
public boolean isDestroyed() {
return password == null;
}
<S extends KeySpec> S getKeySpec(final Class<S> keySpecType) throws InvalidKeySpecException {
if (keySpecType.isAssignableFrom(ClearPasswordSpec.class)) {
final char[] password = getPassword();
return keySpecType.cast(new ClearPasswordSpec(password.clone()));
}
throw new InvalidKeySpecException();
}
boolean verify(final char[] guess) {
return Arrays.equals(getPassword(), guess);
}
<T extends KeySpec> boolean convertibleTo(final Class<T> keySpecType) {
return keySpecType.isAssignableFrom(ClearPasswordSpec.class);
}
private void readObject(ObjectInputStream ignored) throws NotSerializableException {
throw new NotSerializableException();
}
Object writeReplace() {
return ClearPassword.createRaw(getAlgorithm(), password);
}
public ClearPasswordImpl clone() {
final char[] password = this.password;
if (password == null) {
return this;
}
return new ClearPasswordImpl(password.clone());
}
public int hashCode() {
// hashcode becomes 0 when destroyed!
return Arrays.hashCode(password);
}
public boolean equals(final Object obj) {
final char[] password = this.password;
// destroyed passwords are equal to nothing
return obj instanceof ClearPasswordImpl && password != null && Arrays.equals(password, ((ClearPasswordImpl) obj).password);
}
}