Author: erodriguez
Date: Tue Nov 2 20:36:19 2004
New Revision: 56475
Added:
incubator/directory/kerberos/trunk/source/main/org/apache/kerberos/io/decoder/EncKrbPrivPartDecoder.java
Log:
ASN.1 decoder for the encrypted payload of Kerberos Private Messages.
Added:
incubator/directory/kerberos/trunk/source/main/org/apache/kerberos/io/decoder/EncKrbPrivPartDecoder.java
==============================================================================
--- (empty file)
+++
incubator/directory/kerberos/trunk/source/main/org/apache/kerberos/io/decoder/EncKrbPrivPartDecoder.java
Tue Nov 2 20:36:19 2004
@@ -0,0 +1,80 @@
+/*
+ * Copyright 2004 The Apache Software Foundation
+ *
+ * Licensed 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.kerberos.io.decoder;
+
+import org.apache.kerberos.messages.components.*;
+import org.bouncycastle.asn1.*;
+
+import java.io.*;
+import java.util.*;
+
+public class EncKrbPrivPartDecoder extends KerberosMessageDecoder {
+
+ public EncKrbPrivPart decode(byte[] encodedPrivatePart) throws
IOException {
+
+ ByteArrayInputStream bais = new
ByteArrayInputStream(encodedPrivatePart);
+ ASN1InputStream ais = new ASN1InputStream(bais);
+
+ DERApplicationSpecific app = (DERApplicationSpecific)
ais.readObject();
+
+ DERSequence privatePart = (DERSequence) app.getObject();
+
+ return decodePrivatePartSequence(privatePart);
+ }
+
+ private EncKrbPrivPart decodePrivatePartSequence(DERSequence sequence) {
+
+ EncKrbPrivPartModifier modifier = new EncKrbPrivPartModifier();
+
+ for (Enumeration e = sequence.getObjects();
e.hasMoreElements();) {
+ DERTaggedObject object = ((DERTaggedObject)
e.nextElement());
+ int tag = object.getTagNo();
+ DERObject derObject = object.getObject();
+ switch (tag) {
+ case 0:
+ DEROctetString tag0 = (DEROctetString)
derObject;
+ modifier.setUserData(tag0.getOctets());
+ break;
+ case 1:
+ DERGeneralizedTime tag1 =
(DERGeneralizedTime) derObject;
+
modifier.setTimestamp(decodeKerberosTime(tag1));
+ break;
+ case 2:
+ DERInteger tag2 = (DERInteger)derObject;
+ modifier.setMicroSecond(new
Integer(tag2.getValue().intValue()));
+ break;
+ case 3:
+ DERInteger tag3 = (DERInteger)derObject;
+ modifier.setSequenceNumber(new
Integer(tag3.getValue().intValue()));
+ break;
+ case 4:
+ DERSequence tag4 =
(DERSequence)derObject;
+
modifier.setSenderAddress(decodeHostAddress(tag4));
+ break;
+ case 5:
+ DERSequence tag5 =
(DERSequence)derObject;
+
modifier.setRecipientAddress(decodeHostAddress(tag5));
+ break;
+ default:
+ System.out.println(derObject);
+ break;
+ }
+ }
+ return modifier.getEncKrbPrivPart();
+ }
+}
+
