| /* |
| * 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.shared.kerberos.messages; |
| |
| |
| import java.nio.BufferOverflowException; |
| import java.nio.ByteBuffer; |
| |
| import org.apache.directory.api.asn1.EncoderException; |
| import org.apache.directory.api.asn1.ber.tlv.BerValue; |
| import org.apache.directory.api.asn1.ber.tlv.TLV; |
| import org.apache.directory.api.asn1.ber.tlv.UniversalTag; |
| import org.apache.directory.api.util.Strings; |
| import org.apache.directory.server.i18n.I18n; |
| import org.apache.directory.shared.kerberos.KerberosConstants; |
| import org.apache.directory.shared.kerberos.KerberosMessageType; |
| import org.apache.directory.shared.kerberos.components.Checksum; |
| import org.apache.directory.shared.kerberos.components.KrbSafeBody; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| /** |
| * Class representing KRB-SAFE message |
| * |
| * <pre> |
| * KRB-SAFE ::= [APPLICATION 20] SEQUENCE { |
| * pvno [0] INTEGER (5), |
| * msg-type [1] INTEGER (20), |
| * safe-body [2] KRB-SAFE-BODY, |
| * cksum [3] Checksum |
| * } |
| * </pre> |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public class KrbSafe extends KerberosMessage |
| { |
| /** The logger */ |
| private static final Logger log = LoggerFactory.getLogger( KrbError.class ); |
| |
| /** Speedup for logs */ |
| private static final boolean IS_DEBUG = log.isDebugEnabled(); |
| |
| /** body of this message */ |
| private KrbSafeBody krbSafeBody; |
| |
| /** the checksum */ |
| private Checksum checksum; |
| |
| // Storage for computed lengths |
| private int pvnoLen; |
| private int msgTypeLength; |
| private int krbSafeBodyLen; |
| private int checksumLen; |
| private int krbSafeSeqLen; |
| private int krbSafeLen; |
| |
| |
| /** |
| * Creates a new instance of KrbSafe. |
| */ |
| public KrbSafe() |
| { |
| super( KerberosMessageType.KRB_SAFE ); |
| } |
| |
| |
| /** |
| * @return the krbSafeBody |
| */ |
| public KrbSafeBody getSafeBody() |
| { |
| return krbSafeBody; |
| } |
| |
| |
| /** |
| * @param safeBody the KrbSafeBody to set |
| */ |
| public void setSafeBody( KrbSafeBody safeBody ) |
| { |
| this.krbSafeBody = safeBody; |
| } |
| |
| |
| /** |
| * @return the checksum |
| */ |
| public Checksum getChecksum() |
| { |
| return checksum; |
| } |
| |
| |
| /** |
| * @param checksum the checksum to set |
| */ |
| public void setChecksum( Checksum checksum ) |
| { |
| this.checksum = checksum; |
| } |
| |
| |
| /** |
| * Compute the KRB-SAFE length |
| * <pre> |
| * KRB-SAFE : |
| * |
| * 0x74 L1 KRB-SAFE APPLICATION[20] |
| * | |
| * +--> 0x30 L2 KRB-ERROR sequence |
| * | |
| * +--> 0xA0 0x03 pvno tag |
| * | | |
| * | +--> 0x02 0x01 0x05 pvno (5) |
| * | |
| * +--> 0xA1 0x03 msg-type tag |
| * | | |
| * | +--> 0x02 0x01 0x14 msg-type (20) |
| * | |
| * +--> 0xA2 L3 safe-body tag |
| * | | |
| * | +--> 0x30 L3-1 safe-body (KRB-SAFE-BODY) |
| * | |
| * +--> 0xA3 L4 cksum tag |
| * | |
| * +--> 0x30 L4-1 cksum (CHECKSUM) |
| * </pre> |
| */ |
| @Override |
| public int computeLength() |
| { |
| pvnoLen = 1 + 1 + 1; |
| krbSafeSeqLen = 1 + TLV.getNbBytes( pvnoLen ) + pvnoLen; |
| |
| msgTypeLength = 1 + 1 + BerValue.getNbBytes( getMessageType().getValue() ); |
| krbSafeSeqLen += 1 + TLV.getNbBytes( msgTypeLength ) + msgTypeLength; |
| |
| krbSafeBodyLen = krbSafeBody.computeLength(); |
| krbSafeSeqLen += 1 + TLV.getNbBytes( krbSafeBodyLen ) + krbSafeBodyLen; |
| |
| checksumLen = checksum.computeLength(); |
| krbSafeSeqLen += 1 + TLV.getNbBytes( checksumLen ) + checksumLen; |
| |
| krbSafeLen = 1 + TLV.getNbBytes( krbSafeSeqLen ) + krbSafeSeqLen; |
| |
| return 1 + TLV.getNbBytes( krbSafeLen ) + krbSafeLen; |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public ByteBuffer encode( ByteBuffer buffer ) throws EncoderException |
| { |
| if ( buffer == null ) |
| { |
| throw new EncoderException( I18n.err( I18n.ERR_148 ) ); |
| } |
| |
| try |
| { |
| // The KRB-SAFE APPLICATION tag |
| buffer.put( ( byte ) KerberosConstants.KRB_SAFE_TAG ); |
| buffer.put( TLV.getBytes( krbSafeLen ) ); |
| |
| // The KRB-SAFE sequence |
| buffer.put( UniversalTag.SEQUENCE.getValue() ); |
| buffer.put( TLV.getBytes( krbSafeSeqLen ) ); |
| |
| // pvno tag and value |
| buffer.put( ( byte ) KerberosConstants.KRB_SAFE_PVNO_TAG ); |
| buffer.put( TLV.getBytes( pvnoLen ) ); |
| BerValue.encode( buffer, getProtocolVersionNumber() ); |
| |
| // msg-type tag and value |
| buffer.put( ( byte ) KerberosConstants.KRB_SAFE_MSGTYPE_TAG ); |
| buffer.put( TLV.getBytes( msgTypeLength ) ); |
| BerValue.encode( buffer, getMessageType().getValue() ); |
| |
| // safe-body tag and value |
| buffer.put( ( byte ) KerberosConstants.KRB_SAFE_SAFE_BODY_TAG ); |
| buffer.put( TLV.getBytes( krbSafeBodyLen ) ); |
| krbSafeBody.encode( buffer ); |
| |
| // cksum tag and value |
| buffer.put( ( byte ) KerberosConstants.KRB_SAFE_CKSUM_TAG ); |
| buffer.put( TLV.getBytes( checksumLen ) ); |
| checksum.encode( buffer ); |
| } |
| catch ( BufferOverflowException boe ) |
| { |
| log.error( I18n.err( I18n.ERR_736_CANNOT_ENCODE_KRBSAFE, 1 + TLV.getNbBytes( krbSafeLen ) |
| + krbSafeLen, buffer.capacity() ) ); |
| throw new EncoderException( I18n.err( I18n.ERR_138 ) ); |
| } |
| |
| if ( IS_DEBUG ) |
| { |
| log.debug( "KrbSafe encoding : {}", Strings.dumpBytes( buffer.array() ) ); |
| log.debug( "KrbSafe initial value : {}", toString() ); |
| } |
| |
| return buffer; |
| } |
| |
| |
| /** |
| * @see Object#toString() |
| */ |
| public String toString() |
| { |
| StringBuilder sb = new StringBuilder(); |
| |
| sb.append( "KRB-SAFE : {\n" ); |
| sb.append( " pvno: " ).append( getProtocolVersionNumber() ).append( '\n' ); |
| sb.append( " msgType: " ).append( getMessageType() ).append( '\n' ); |
| |
| if ( krbSafeBody != null ) |
| { |
| sb.append( " safe-body: " ).append( krbSafeBody ).append( '\n' ); |
| } |
| |
| if ( checksum != null ) |
| { |
| sb.append( " cusec: " ).append( checksum ).append( '\n' ); |
| } |
| |
| sb.append( "}\n" ); |
| |
| return sb.toString(); |
| } |
| } |