| /* |
| * 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.components; |
| |
| |
| import java.nio.BufferOverflowException; |
| import java.nio.ByteBuffer; |
| |
| import org.apache.directory.api.asn1.Asn1Object; |
| 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.KerberosTime; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| /** |
| * The PaEncTsEnc structure is used to store a PA-ENC-TS-ENC associated to a type. |
| * |
| * The ASN.1 grammar is : |
| * <pre> |
| * PA-ENC-TS-ENC ::= SEQUENCE { |
| * patimestamp [0] KerberosTime -- client's time --, |
| * pausec [1] Microseconds OPTIONAL |
| * } |
| * </pre> |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public class PaEncTsEnc implements Asn1Object |
| { |
| /** The logger */ |
| private static final Logger log = LoggerFactory.getLogger( PaEncTsEnc.class ); |
| |
| /** Speedup for logs */ |
| private static final boolean IS_DEBUG = log.isDebugEnabled(); |
| |
| /** The patimestamp */ |
| private KerberosTime patimestamp; |
| |
| /** The pausec */ |
| private Integer pausec; |
| |
| // Storage for computed lengths |
| private int paTimestampLength; |
| private int paUsecLength; |
| private int paEncTsEncLength; |
| |
| |
| /** |
| * Creates a new instance of PaEncTsEnc. |
| */ |
| public PaEncTsEnc() |
| { |
| } |
| |
| |
| /** |
| * Creates a new instance of PaEncTsEnc. |
| */ |
| public PaEncTsEnc( KerberosTime paTimestamp, int pausec ) |
| { |
| this.patimestamp = paTimestamp; |
| this.pausec = pausec; |
| } |
| |
| |
| /** |
| * Returns the patimestamp value. |
| * |
| * @return The patimestamp value. |
| */ |
| public KerberosTime getPaTimestamp() |
| { |
| return patimestamp; |
| } |
| |
| |
| /** |
| * Set the patimestamp. |
| * |
| * @param patimestamp The patimestamp value |
| */ |
| public void setPaTimestamp( KerberosTime patimestamp ) |
| { |
| this.patimestamp = patimestamp; |
| } |
| |
| |
| /** |
| * @return the pausec |
| */ |
| public int getPausec() |
| { |
| if ( pausec == null ) |
| { |
| return -1; |
| } |
| |
| return pausec; |
| } |
| |
| |
| /** |
| * @param pausec the pausec to set |
| */ |
| public void setPausec( int pausec ) |
| { |
| this.pausec = pausec; |
| } |
| |
| |
| /** |
| * Compute the PA-ENC-TS-ENC length |
| * <pre> |
| * PA-ENC-TS-ENC : |
| * |
| * 0x30 L1 PA-ENC-TS-ENC sequence |
| * | |
| * +--> 0xA0 0x11 patimestamp tag |
| * | | |
| * | +--> 0x18 0x0F patimestamp value (KerberosTime) |
| * | |
| * +--> 0xA1 L2 pausec tag |
| * | |
| * +--> 0x02 L2-1 pausec (INTEGER) |
| * |
| * </pre> |
| */ |
| public int computeLength() |
| { |
| // The paTimestamp |
| paTimestampLength = 0x11; |
| |
| paEncTsEncLength = 1 + TLV.getNbBytes( paTimestampLength ) + paTimestampLength; |
| |
| // The pausec, if any |
| if ( pausec != null ) |
| { |
| int pausecLength = BerValue.getNbBytes( pausec ); |
| paUsecLength = 1 + TLV.getNbBytes( pausecLength ) + pausecLength; |
| paEncTsEncLength += 1 + TLV.getNbBytes( paUsecLength ) + paUsecLength; |
| } |
| |
| // Compute the whole sequence length |
| return 1 + TLV.getNbBytes( paEncTsEncLength ) + paEncTsEncLength; |
| } |
| |
| |
| /** |
| * Encode the PA-ENC-TS-ENC message to a PDU. |
| * |
| * <pre> |
| * PA-ENC-TS-ENC : |
| * |
| * 0x30 LL |
| * 0xA0 0x11 |
| * 0x18 0x0F patimestamp |
| * [0xA1 LL |
| * 0x02 LL pausec] |
| * </pre> |
| * @param buffer The buffer where to put the PDU. It should have been allocated |
| * before, with the right size. |
| * @return The constructed PDU. |
| */ |
| public ByteBuffer encode( ByteBuffer buffer ) throws EncoderException |
| { |
| if ( buffer == null ) |
| { |
| throw new EncoderException( I18n.err( I18n.ERR_148 ) ); |
| } |
| |
| try |
| { |
| // The PA-ENC-TS-ENC SEQ Tag |
| buffer.put( UniversalTag.SEQUENCE.getValue() ); |
| buffer.put( TLV.getBytes( paEncTsEncLength ) ); |
| |
| // The patimestamp, first the tag, then the value |
| buffer.put( ( byte ) KerberosConstants.PA_ENC_TS_ENC_PA_TIMESTAMP_TAG ); |
| buffer.put( ( byte ) 0x11 ); |
| |
| buffer.put( UniversalTag.GENERALIZED_TIME.getValue() ); |
| buffer.put( ( byte ) 0x0F ); |
| buffer.put( patimestamp.getBytes() ); |
| |
| // The pausec, first the tag, then the value, if any |
| if ( pausec != null ) |
| { |
| buffer.put( ( byte ) KerberosConstants.PA_ENC_TS_ENC_PA_USEC_TAG ); |
| buffer.put( TLV.getBytes( paUsecLength ) ); |
| BerValue.encode( buffer, pausec ); |
| } |
| } |
| catch ( BufferOverflowException boe ) |
| { |
| log.error( I18n.err( I18n.ERR_140, 1 + TLV.getNbBytes( paEncTsEncLength ) + paEncTsEncLength, |
| buffer.capacity() ) ); |
| throw new EncoderException( I18n.err( I18n.ERR_138 ) ); |
| } |
| |
| if ( IS_DEBUG ) |
| { |
| log.debug( "Checksum encoding : {}", Strings.dumpBytes( buffer.array() ) ); |
| log.debug( "Checksum initial value : {}", toString() ); |
| } |
| |
| return buffer; |
| } |
| |
| |
| /** |
| * @see Object#toString() |
| */ |
| public String toString() |
| { |
| return toString( "" ); |
| } |
| |
| |
| /** |
| * @see Object#toString() |
| */ |
| public String toString( String tabs ) |
| { |
| StringBuilder sb = new StringBuilder(); |
| |
| sb.append( tabs ).append( "PA-ENC-TS-ENC : {\n" ); |
| sb.append( tabs ).append( " patimestamp : " ).append( patimestamp ).append( '\n' ); |
| |
| if ( pausec != null ) |
| { |
| sb.append( tabs + " pausec :" ).append( pausec ).append( '\n' ); |
| } |
| |
| sb.append( tabs + "}\n" ); |
| |
| return sb.toString(); |
| } |
| } |