| /* |
| * 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.KerberosTime; |
| import org.apache.directory.shared.kerberos.components.EncryptionKey; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| /** |
| * Encrypted part of the application response. |
| * It will store the object described by the ASN.1 grammar : |
| * <pre> |
| * EncAPRepPart ::= [APPLICATION 27] SEQUENCE { |
| * ctime [0] KerberosTime, |
| * cusec [1] Microseconds, |
| * subkey [2] <EncryptionKey> OPTIONAL, |
| * seq-number [3] UInt32 OPTIONAL |
| * } |
| * </pre> |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public class EncApRepPart extends KerberosMessage |
| { |
| /** The logger */ |
| private static final Logger LOG = LoggerFactory.getLogger( EncApRepPart.class ); |
| |
| /** Speedup for logs */ |
| private static final boolean IS_DEBUG = LOG.isDebugEnabled(); |
| |
| /** The client time */ |
| private KerberosTime ctime; |
| |
| /** the microsecond part of the client's timestamp */ |
| private int cusec; |
| |
| /** Encryption key */ |
| private EncryptionKey subkey; //optional |
| |
| /** Sequence number */ |
| private Integer seqNumber; //optional |
| |
| // Storage for computed lengths |
| private int ctimeLength; |
| private int cusecLength; |
| private int subKeyLength; |
| private int seqNumberLength; |
| private int encApRepPartSeqLength; |
| private int encApRepPartLength; |
| |
| |
| /** |
| * Creates a new instance of EncApRepPart. |
| */ |
| public EncApRepPart() |
| { |
| super( KerberosMessageType.ENC_AP_REP_PART ); |
| } |
| |
| |
| /** |
| * Returns the client {@link KerberosTime}. |
| * |
| * @return The client {@link KerberosTime}. |
| */ |
| public KerberosTime getCTime() |
| { |
| return ctime; |
| } |
| |
| |
| /** |
| * @param ctime the ctime to set |
| */ |
| public void setCTime( KerberosTime ctime ) |
| { |
| this.ctime = ctime; |
| } |
| |
| |
| /** |
| * @return the cusec |
| */ |
| public int getCusec() |
| { |
| return cusec; |
| } |
| |
| |
| /** |
| * @param cusec the cusec to set |
| */ |
| public void setCusec( int cusec ) |
| { |
| this.cusec = cusec; |
| } |
| |
| |
| /** |
| * @return the subkey |
| */ |
| public EncryptionKey getSubkey() |
| { |
| return subkey; |
| } |
| |
| |
| /** |
| * @param subkey the subkey to set |
| */ |
| public void setSubkey( EncryptionKey subkey ) |
| { |
| this.subkey = subkey; |
| } |
| |
| |
| /** |
| * @return the seqNumber |
| */ |
| public Integer getSeqNumber() |
| { |
| return seqNumber; |
| } |
| |
| |
| /** |
| * @param seqNumber the seqNumber to set |
| */ |
| public void setSeqNumber( Integer seqNumber ) |
| { |
| this.seqNumber = seqNumber; |
| } |
| |
| |
| /** |
| * Compute the Authenticator length |
| * <pre> |
| * Authenticator : |
| * |
| * 0x7B L1 EncApRepPart [APPLICATION 27] |
| * | |
| * +--> 0x30 L2 SEQ |
| * | |
| * +--> 0xA0 11 ctime tag |
| * | | |
| * | +--> 0x18 0x0F ttt ctime (KerberosTime) |
| * | |
| * +--> 0xA1 L3 cusec tag |
| * | | |
| * | +--> 0x02 L3-1 cusec (INTEGER) |
| * | |
| * +--> 0xA2 L4 subkey (EncryptionKey) |
| * | |
| * +--> 0xA3 L5 seq-number tag |
| * | |
| * +--> 0x02 L5-1 NN seq-number (INTEGER) |
| * </pre> |
| */ |
| @Override |
| public int computeLength() |
| { |
| // Compute the ctime length. |
| ctimeLength = 1 + 1 + 0x0F; |
| encApRepPartSeqLength = 1 + TLV.getNbBytes( ctimeLength ) + ctimeLength; |
| |
| // Compute the cusec length |
| cusecLength = 1 + 1 + BerValue.getNbBytes( cusec ); |
| encApRepPartSeqLength += 1 + TLV.getNbBytes( cusecLength ) + cusecLength; |
| |
| // Compute the subkey length, if any |
| if ( subkey != null ) |
| { |
| subKeyLength = subkey.computeLength(); |
| encApRepPartSeqLength += 1 + TLV.getNbBytes( subKeyLength ) + subKeyLength; |
| } |
| |
| // Compute the sequence size, if any |
| if ( seqNumber != null ) |
| { |
| seqNumberLength = 1 + 1 + BerValue.getNbBytes( seqNumber ); |
| encApRepPartSeqLength += 1 + TLV.getNbBytes( seqNumberLength ) + seqNumberLength; |
| } |
| |
| encApRepPartLength = 1 + TLV.getNbBytes( encApRepPartSeqLength ) + encApRepPartSeqLength; |
| |
| return 1 + TLV.getNbBytes( encApRepPartLength ) + encApRepPartLength; |
| } |
| |
| |
| /** |
| * Encode the EncApRepPart message to a PDU. |
| * <pre> |
| * EncApRepPart : |
| * |
| * 0x7B LL |
| * 0x30 LL |
| * 0xA0 0x11 |
| * 0x18 0x0F ttt ctime |
| * 0xA1 LL |
| * 0x02 LL NN cusec |
| * [0xA2 LL |
| * 0x30 LL abcd] subkey |
| * [0xA3 LL |
| * 0x02 LL NN] seq-number |
| * </pre> |
| * @return The constructed PDU. |
| */ |
| @Override |
| public ByteBuffer encode( ByteBuffer buffer ) throws EncoderException |
| { |
| if ( buffer == null ) |
| { |
| buffer = ByteBuffer.allocate( computeLength() ); |
| } |
| |
| try |
| { |
| // The EncApRepPart APPLICATION Tag |
| buffer.put( ( byte ) KerberosConstants.ENC_AP_REP_PART_TAG ); |
| buffer.put( TLV.getBytes( encApRepPartLength ) ); |
| |
| // The EncApRepPart SEQ Tag |
| buffer.put( ( byte ) UniversalTag.SEQUENCE.getValue() ); |
| buffer.put( TLV.getBytes( encApRepPartSeqLength ) ); |
| |
| // The ctime ------------------------------------------------------ |
| // The tag |
| buffer.put( ( byte ) KerberosConstants.ENC_AP_REP_PART_CTIME_TAG ); |
| buffer.put( ( byte ) 0x11 ); |
| |
| // The value |
| buffer.put( ( byte ) UniversalTag.GENERALIZED_TIME.getValue() ); |
| buffer.put( ( byte ) 0x0F ); |
| buffer.put( ctime.getBytes() ); |
| |
| // The cusec ------------------------------------------------------ |
| // The tag |
| buffer.put( ( byte ) KerberosConstants.ENC_AP_REP_PART_CUSEC_TAG ); |
| buffer.put( TLV.getBytes( cusecLength ) ); |
| |
| // The value |
| BerValue.encode( buffer, cusec ); |
| |
| // The subkey if any ---------------------------------------------- |
| if ( subkey != null ) |
| { |
| // The tag |
| buffer.put( ( byte ) KerberosConstants.ENC_AP_REP_PART_SUB_KEY_TAG ); |
| buffer.put( TLV.getBytes( subKeyLength ) ); |
| |
| // The value |
| subkey.encode( buffer ); |
| } |
| |
| // The seq-number, if any ----------------------------------------- |
| if ( seqNumber != null ) |
| { |
| // The tag |
| buffer.put( ( byte ) KerberosConstants.ENC_AP_REP_PART_SEQ_NUMBER_TAG ); |
| buffer.put( TLV.getBytes( seqNumberLength ) ); |
| |
| // The value |
| BerValue.encode( buffer, seqNumber ); |
| } |
| |
| } |
| catch ( BufferOverflowException boe ) |
| { |
| LOG.error( I18n.err( I18n.ERR_139, 1 + TLV.getNbBytes( encApRepPartLength ) |
| + encApRepPartLength, buffer.capacity() ) ); |
| throw new EncoderException( I18n.err( I18n.ERR_138 ) ); |
| } |
| |
| if ( IS_DEBUG ) |
| { |
| LOG.debug( "EncApRepPart encoding : {}", Strings.dumpBytes( buffer.array() ) ); |
| LOG.debug( "EncApRepPart initial value : {}", toString() ); |
| } |
| |
| return buffer; |
| } |
| |
| |
| /** |
| * @see Object#toString() |
| */ |
| public String toString() |
| { |
| StringBuilder sb = new StringBuilder(); |
| |
| sb.append( "EncApRepPart : \n" ); |
| |
| sb.append( " ctime : " ).append( ctime ).append( '\n' ); |
| sb.append( " cusec : " ).append( cusec ).append( '\n' ); |
| |
| if ( subkey != null ) |
| { |
| sb.append( " subkey : " ).append( subkey ).append( '\n' ); |
| } |
| |
| if ( seqNumber != null ) |
| { |
| sb.append( " seq-number : " ).append( seqNumber ).append( '\n' ); |
| } |
| |
| return sb.toString(); |
| } |
| } |