| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.directory.server.kerberos.changepwd.messages; |
| |
| |
| import java.nio.ByteBuffer; |
| |
| import org.apache.directory.api.asn1.DecoderException; |
| import org.apache.directory.api.asn1.EncoderException; |
| import org.apache.directory.api.asn1.ber.Asn1Decoder; |
| import org.apache.directory.api.util.Strings; |
| import org.apache.directory.server.kerberos.changepwd.exceptions.ChangePasswdErrorType; |
| import org.apache.directory.server.kerberos.changepwd.exceptions.ChangePasswordException; |
| import org.apache.directory.shared.kerberos.codec.krbError.KrbErrorContainer; |
| import org.apache.directory.shared.kerberos.messages.KrbError; |
| |
| |
| /** |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public class ChangePasswordError extends AbstractPasswordMessage |
| { |
| private KrbError krbError; |
| |
| private short krbErrorLen; |
| private short messageLength; |
| |
| public ChangePasswordError( KrbError krbError ) |
| { |
| this( PVNO, krbError ); |
| } |
| |
| /** |
| * Creates a new instance of ChangePasswordError. |
| * |
| * @param versionNumber |
| * @param krbError The KRB-ERROR |
| */ |
| public ChangePasswordError( short versionNumber, KrbError krbError ) |
| { |
| super( versionNumber ); |
| |
| this.krbError = krbError; |
| } |
| |
| |
| /** |
| * Returns the {@link KrbError}. |
| * |
| * @return The {@link KrbError}. |
| */ |
| public KrbError getKrbError() |
| { |
| return krbError; |
| } |
| |
| |
| @Override |
| public short computeLength() |
| { |
| krbErrorLen = ( short ) krbError.computeLength(); |
| messageLength = ( short ) ( HEADER_LENGTH + krbErrorLen ); |
| |
| return messageLength; |
| } |
| |
| @Override |
| public ByteBuffer encode( ByteBuffer buf ) throws EncoderException |
| { |
| buf.putShort( messageLength ); |
| |
| buf.putShort( getVersionNumber() ); |
| |
| buf.putShort( ( short )0 ); // zero means, what follows is an error |
| |
| krbError.encode( buf ); |
| |
| return buf; |
| } |
| |
| /** |
| * Decodes a {@link ByteBuffer} into a {@link ChangePasswordError}. |
| * |
| * @param buf |
| * @return The {@link ChangePasswordError}. |
| * @throws ChangePasswordException |
| */ |
| public static ChangePasswordError decode( ByteBuffer buf ) throws ChangePasswordException |
| { |
| short messageLength = buf.getShort(); |
| |
| short pvno = buf.getShort(); |
| |
| // AP_REQ length will be 0 for error messages |
| buf.getShort(); // authHeader length |
| |
| int errorLength = messageLength - HEADER_LENGTH; |
| |
| byte[] errorBytes = new byte[errorLength]; |
| |
| buf.get( errorBytes ); |
| ByteBuffer errorBuffer = ByteBuffer.wrap( errorBytes ); |
| |
| KrbErrorContainer container = new KrbErrorContainer( errorBuffer ); |
| Asn1Decoder decoder = new Asn1Decoder(); |
| |
| try |
| { |
| decoder.decode( errorBuffer, container ); |
| } |
| catch( DecoderException e ) |
| { |
| throw new ChangePasswordException( ChangePasswdErrorType.KRB5_KPASSWD_MALFORMED, e ); |
| } |
| |
| KrbError errorMessage = container.getKrbError(); |
| |
| return new ChangePasswordError( pvno, errorMessage ); |
| } |
| |
| public ChangePasswdErrorType getResultCode() |
| { |
| ByteBuffer buf = ByteBuffer.wrap( krbError.getEData() ); |
| |
| return ChangePasswdErrorType.getTypeByValue( buf.getShort() ); |
| } |
| |
| public String getResultString() |
| { |
| byte[] edata = krbError.getEData(); |
| |
| // first two bytes contain the result code |
| return Strings.utf8ToString( edata, 2, edata.length - 2 ); |
| } |
| } |