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20 package org.apache.directory.server.kerberos.shared.messages.components;
21
22
23 import java.nio.BufferOverflowException;
24 import java.nio.ByteBuffer;
25 import java.text.ParseException;
26
27 import javax.security.auth.kerberos.KerberosPrincipal;
28
29 import org.apache.directory.server.kerberos.shared.KerberosConstants;
30 import org.apache.directory.server.kerberos.shared.KerberosUtils;
31 import org.apache.directory.server.kerberos.shared.exceptions.ErrorType;
32 import org.apache.directory.server.kerberos.shared.messages.value.AuthorizationData;
33 import org.apache.directory.server.kerberos.shared.messages.value.EncryptedData;
34 import org.apache.directory.server.kerberos.shared.messages.value.EncryptionKey;
35 import org.apache.directory.server.kerberos.shared.messages.value.HostAddresses;
36 import org.apache.directory.server.kerberos.shared.messages.value.KerberosTime;
37 import org.apache.directory.server.kerberos.shared.messages.value.PrincipalName;
38 import org.apache.directory.server.kerberos.shared.messages.value.TransitedEncoding;
39 import org.apache.directory.server.kerberos.shared.messages.value.flags.TicketFlags;
40 import org.apache.directory.shared.asn1.AbstractAsn1Object;
41 import org.apache.directory.shared.asn1.ber.tlv.TLV;
42 import org.apache.directory.shared.asn1.ber.tlv.UniversalTag;
43 import org.apache.directory.shared.asn1.ber.tlv.Value;
44 import org.apache.directory.shared.asn1.codec.EncoderException;
45 import org.apache.directory.shared.ldap.util.StringTools;
46 import org.slf4j.Logger;
47 import org.slf4j.LoggerFactory;
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56 public class Ticket extends AbstractAsn1Object
57 {
58
59 private static final Logger LOG = LoggerFactory.getLogger( Ticket.class );
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62 private static final boolean IS_DEBUG = LOG.isDebugEnabled();
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65 public static final int TICKET_VNO = KerberosConstants.KERBEROS_V5;
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68 private int tktvno;
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71 private byte[] realmBytes;
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74 private PrincipalName sName;
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77 private String realm;
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80 private EncryptedData encPart;
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83 private EncTicketPart encTicketPart;
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86 private transient int tktvnoLength;
87 private transient int realmLength;
88 private transient int sNameLength;
89 private transient int encPartLength;
90 private transient int ticketSeqLength;
91 private transient int ticketLength;
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99 public Ticket( KerberosPrincipal serverPrincipal, EncryptedData encPart ) throws InvalidTicketException
100 {
101 this( TICKET_VNO, serverPrincipal, encPart );
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103 setServerPrincipal( serverPrincipal );
104 }
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110 public Ticket()
111 {
112 }
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122 public Ticket( int tktvno, KerberosPrincipal serverPrincipal, EncryptedData encPart ) throws InvalidTicketException
123 {
124 this.tktvno = tktvno;
125 this.encPart = encPart;
126 setServerPrincipal( serverPrincipal );
127 }
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135 public void setEncTicketPart( EncTicketPart decryptedPart )
136 {
137 encTicketPart = decryptedPart;
138 }
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146 public int getTktVno()
147 {
148 return tktvno;
149 }
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156 public void setTktVno( int tktvno )
157 {
158 this.tktvno = tktvno;
159 }
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167 public PrincipalName getSName()
168 {
169 return sName;
170 }
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178 public KerberosPrincipal getServerPrincipal()
179 {
180 return KerberosUtils.getKerberosPrincipal( sName, realm );
181 }
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188 public void setSName( PrincipalName sName )
189 {
190 this.sName = sName;
191 }
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198 public void setServerPrincipal( KerberosPrincipal serverPrincipal ) throws InvalidTicketException
199 {
200 try
201 {
202 sName = new PrincipalName( serverPrincipal.getName(), serverPrincipal.getNameType() );
203 realm = serverPrincipal.getRealm();
204 }
205 catch ( ParseException pe )
206 {
207 LOG.error( "Cannot create a ticket for the {} KerberosPrincipal, error : {}", serverPrincipal, pe.getMessage() );
208 throw new InvalidTicketException( ErrorType.KRB_ERR_GENERIC, "Cannot create a ticket : " + pe.getMessage() );
209 }
210 }
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218 public String getRealm()
219 {
220 return realm;
221 }
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228 public void setRealm( String realm )
229 {
230 this.realm = realm;
231 }
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239 public EncryptedData getEncPart()
240 {
241 return encPart;
242 }
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249 public void setEncPart( EncryptedData encPart )
250 {
251 this.encPart = encPart;
252 }
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260 public EncTicketPart getEncTicketPart()
261 {
262 return encTicketPart;
263 }
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442 public int computeLength()
443 {
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445 tktvnoLength = 1 + TLV.getNbBytes( tktvno ) + Value.getNbBytes( tktvno );
446
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448 realmBytes = StringTools.getBytesUtf8( realm );
449 realmLength = 1 + TLV.getNbBytes( realmBytes.length ) + realmBytes.length;
450
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452 sNameLength = sName.computeLength();
453
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455 encPartLength = encPart.computeLength();
456
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458 ticketSeqLength =
459 1 + TLV.getNbBytes( tktvnoLength ) + tktvnoLength +
460 1 + TLV.getNbBytes( realmLength ) + realmLength +
461 1 + TLV.getNbBytes( sNameLength ) + sNameLength +
462 1 + TLV.getNbBytes( encPartLength ) + encPartLength;
463
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465 ticketLength = 1 + TLV.getNbBytes( ticketSeqLength ) + ticketSeqLength;
466
467 return 1 + TLV.getNbBytes( ticketLength ) + ticketLength;
468 }
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488 public ByteBuffer encode( ByteBuffer buffer ) throws EncoderException
489 {
490 if ( buffer == null )
491 {
492 buffer = ByteBuffer.allocate( computeLength() );
493 }
494
495 try
496 {
497
498 buffer.put( (byte)0x61 );
499 buffer.put( TLV.getBytes( ticketLength ) );
500
501
502 buffer.put( UniversalTag.SEQUENCE_TAG );
503 buffer.put( TLV.getBytes( ticketSeqLength ) );
504
505
506 buffer.put( ( byte ) 0xA0 );
507 buffer.put( TLV.getBytes( tktvnoLength ) );
508 Value.encode( buffer, tktvno );
509
510
511 buffer.put( ( byte ) 0xA1 );
512 buffer.put( TLV.getBytes( realmLength ) );
513 buffer.put( UniversalTag.GENERALIZED_STRING_TAG );
514 buffer.put( TLV.getBytes( realmBytes.length ) );
515 buffer.put( realmBytes );
516
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518 buffer.put( ( byte ) 0xA2 );
519 buffer.put( TLV.getBytes( sNameLength ) );
520 sName.encode( buffer );
521
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523 buffer.put( ( byte ) 0xA3 );
524 buffer.put( TLV.getBytes( encPartLength ) );
525 encPart.encode( buffer );
526 }
527 catch ( BufferOverflowException boe )
528 {
529 LOG.error( "Cannot encode the Ticket object, the PDU size is {} when only {} bytes has been allocated", 1
530 + TLV.getNbBytes( ticketLength ) + ticketLength, buffer.capacity() );
531 throw new EncoderException( "The PDU buffer size is too small !" );
532 }
533
534 if ( IS_DEBUG )
535 {
536 LOG.debug( "Ticket encoding : {}", StringTools.dumpBytes( buffer.array() ) );
537 LOG.debug( "Ticket initial value : {}", toString() );
538 }
539
540 return buffer;
541 }
542 }