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20 package org.apache.directory.shared.kerberos.codec.actions;
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23 import org.apache.directory.api.asn1.DecoderException;
24 import org.apache.directory.api.asn1.ber.Asn1Container;
25 import org.apache.directory.api.asn1.ber.Asn1Decoder;
26 import org.apache.directory.api.asn1.ber.grammar.GrammarAction;
27 import org.apache.directory.api.asn1.ber.tlv.TLV;
28 import org.apache.directory.api.i18n.I18n;
29 import org.apache.directory.shared.kerberos.codec.encryptedData.EncryptedDataContainer;
30 import org.apache.directory.shared.kerberos.components.EncryptedData;
31 import org.slf4j.Logger;
32 import org.slf4j.LoggerFactory;
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40 public abstract class AbstractReadEncryptedPart<E extends Asn1Container> extends GrammarAction<E>
41 {
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43 private static final Logger LOG = LoggerFactory.getLogger( AbstractReadEncryptedPart.class );
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46 private static final boolean IS_DEBUG = LOG.isDebugEnabled();
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52 public AbstractReadEncryptedPart( String name )
53 {
54 super( name );
55 }
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65 protected abstract void setEncryptedData( EncryptedData encryptedData, E container );
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71 public final void action( E container ) throws DecoderException
72 {
73 TLV tlv = container.getCurrentTLV();
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76 if ( tlv.getLength() == 0 )
77 {
78 LOG.error( I18n.err( I18n.ERR_04066 ) );
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81 throw new DecoderException( I18n.err( I18n.ERR_04067 ) );
82 }
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85 Asn1Decoder encryptedDataDecoder = new Asn1Decoder();
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87 EncryptedDataContainer encryptedDataContainer = new EncryptedDataContainer();
88 encryptedDataContainer.setStream( container.getStream() );
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91 try
92 {
93 encryptedDataDecoder.decode( container.getStream(), encryptedDataContainer );
94 }
95 catch ( DecoderException de )
96 {
97 throw de;
98 }
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100 EncryptedData encryptedData = encryptedDataContainer.getEncryptedData();
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102 if ( IS_DEBUG )
103 {
104 LOG.debug( "EncryptedData : " + encryptedData );
105 }
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107 setEncryptedData( encryptedData, container );
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110 tlv.setExpectedLength( tlv.getExpectedLength() - tlv.getLength() );
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113 container.updateParent();
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115 container.setGrammarEndAllowed( true );
116 }
117 }