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Posted to commits@directory.apache.org by we...@apache.org on 2004/01/27 03:20:42 UTC
svn commit: rev 6311 - incubator/directory/snickers/trunk/ber/src/java/org/apache/snickers/ber/util
Author: wesmckean
Date: Mon Jan 26 18:20:42 2004
New Revision: 6311
Added:
incubator/directory/snickers/trunk/ber/src/java/org/apache/snickers/ber/util/
incubator/directory/snickers/trunk/ber/src/java/org/apache/snickers/ber/util/TLVParser.java
Log:
Utility class to parse TLVs from the stream. This will be the bases for our new parser.
Added: incubator/directory/snickers/trunk/ber/src/java/org/apache/snickers/ber/util/TLVParser.java
==============================================================================
--- (empty file)
+++ incubator/directory/snickers/trunk/ber/src/java/org/apache/snickers/ber/util/TLVParser.java Mon Jan 26 18:20:42 2004
@@ -0,0 +1,232 @@
+/*
+
+ ============================================================================
+ The Apache Software License, Version 1.1
+ ============================================================================
+
+ Copyright (C) 1999-2002 The Apache Software Foundation. All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without modifica-
+ tion, are permitted provided that the following conditions are met:
+
+ 1. Redistributions of source code must retain the above copyright notice,
+ this list of conditions and the following disclaimer.
+
+ 2. Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation
+ and/or other materials provided with the distribution.
+
+ 3. The end-user documentation included with the redistribution, if any, must
+ include the following acknowledgment: "This product includes software
+ developed by the Apache Software Foundation (http://www.apache.org/)."
+ Alternately, this acknowledgment may appear in the software itself, if
+ and wherever such third-party acknowledgments normally appear.
+
+ 4. The names "Eve Directory Server", "Apache Directory Project", "Apache Eve"
+ and "Apache Software Foundation" must not be used to endorse or promote
+ products derived from this software without prior written
+ permission. For written permission, please contact apache@apache.org.
+
+ 5. Products derived from this software may not be called "Apache", nor may
+ "Apache" appear in their name, without prior written permission of the
+ Apache Software Foundation.
+
+ THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
+ INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
+ DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ This software consists of voluntary contributions made by many individuals
+ on behalf of the Apache Software Foundation. For more information on the
+ Apache Software Foundation, please see <http://www.apache.org/>.
+
+*/
+package org.apache.snickers.ber.util;
+
+import java.io.InputStream;
+import java.io.IOException;
+import java.io.FileInputStream;
+
+import org.apache.commons.codec.binary.*;
+import org.apache.snickers.ber.*;
+
+/**
+ * @author Wes McKean
+ *
+ * A simply utility class to parse the ASN.1 TLVs out of a
+ * stream and display some useful information.
+ */
+public class TLVParser {
+
+ private InputStream m_is = null;
+
+ /**
+ * Basic constructor
+ */
+ public TLVParser( InputStream is ) {
+ super();
+ m_is = is;
+ }
+
+ public void execute() {
+
+ boolean finished = false;
+
+ while( decodeTLV(0) != -1 );
+ }
+
+ private int decodeTLV( int indent ) {
+
+ int count = 0;
+ StringBuffer sb = new StringBuffer();
+
+ for( int j = 0; j < indent; j++ ) {
+ sb.append(" ");
+ }
+
+ String strIndent = sb.toString();
+ int valueLen = 0;
+
+ try {
+ // Read the tag first
+ int tag = m_is.read();
+
+ if( tag == -1 ) return tag;
+
+ count++;
+
+ int id = tag & (Binary.BIT_4 | Binary.BIT_3 | Binary.BIT_2 | Binary.BIT_1 | Binary.BIT_0 );
+ boolean primative = BerUtils.isPrimitive(tag);
+ TypeClass tc = BerUtils.getTypeClass(tag);
+
+ System.out.println( strIndent + ">>>>>>>>>>>>>> TLV <<<<<<<<<<<<<" );
+ System.out.println( strIndent + "Tag: " + toBits(tag) );
+ System.out.println( strIndent + " class: " + tc );
+ System.out.println( strIndent + " id: " + id );
+ System.out.println( strIndent + " p/c: " + ( primative ? "primative" : "constructed" ) );
+
+ int length = m_is.read();
+ count++;
+
+ System.out.println( strIndent + " length: " + toBits( length ) );
+
+ // Try to determine the length value
+ if( ( length & Binary.BIT_7 ) == 0 ) {
+ valueLen = length & ~Binary.BIT_7;
+ System.out.println( strIndent + " SHORT FORM=" + (valueLen));
+ }
+ else {
+ // BIT 8 is set to one, and we therefore have
+ // a long form or an indefinite form
+ int lenlen = (length & ~Binary.BIT_7);
+
+ if( lenlen == 0 ) {
+ System.out.println( strIndent + " INDEFINITE FORM=" + (lenlen));
+ }
+ else {
+ valueLen = 0;
+
+ for( int i = 0; i < lenlen; i++ ) {
+ int b = m_is.read();
+ count++;
+ valueLen = (( valueLen << 8 ) | b );
+ }
+
+ System.out.println( strIndent + " LONG FORM=" + (valueLen));
+ }
+ }
+
+ System.out.println( strIndent+ " value: " );
+
+ if( primative ) {
+ if( tc.equals( TypeClass.PRIVATE )) {
+ while ( valueLen > 0 ) {
+ int t = decodeTLV( indent + 5 );
+ count += t;
+ valueLen -= t;
+ }
+ }
+ else {
+ decodePrimative( id, valueLen, strIndent );
+ count += valueLen;
+ }
+ }
+ else {
+ while ( valueLen > 0 ) {
+ int t = decodeTLV( indent + 5 );
+ count += t;
+ valueLen -= t;
+ }
+ }
+
+ System.out.println( strIndent + ">>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<" );
+
+ return count;
+ }
+ catch( IOException e ) {
+ e.printStackTrace();
+ }
+
+ return -1;
+ }
+
+ private void decodePrimative( int id, int len, String strIndent ) throws IOException {
+ byte[] b = new byte[len];
+ m_is.read(b, 0, len );
+ int value = 0;
+
+ switch( id ) {
+ case Primative.BOOLEAN:
+ boolean bVal = ( ((int)b[0] ) > 0 ) ? true : false;
+ System.out.println( strIndent + " BOOLEAN = " + true );
+ break;
+ case Primative.INTEGER:
+
+ for( int i = 0; i < len; i++ ) {
+ value = (value << 8) | (int)b[i];
+ }
+ System.out.println( strIndent + " INTEGER = " + value );
+ break;
+ case Primative.OCTETSTRING:
+ String svalue = new String(b);
+ System.out.println( strIndent + " String = " + svalue );
+ break;
+ case Primative.ENUMERATION:
+ for( int i = 0; i < len; i++ ) {
+ value = (value << 8) | (int)b[i];
+ }
+ System.out.println( strIndent + " ENUMERATION = " + value );
+ break;
+ default:
+ System.out.println( strIndent + " CONTEXT SPECIFIC = " + new String(b) );
+ }
+ }
+
+ private String toBits( int octet ) {
+ String result = "";
+
+ for( int i = 0; i < 8; i++ ) {
+ if( (( 1 << i ) & octet) != 0 ) {
+ result = "1" + result;
+ }
+ else
+ result = "0" + result;
+ }
+
+ return result;
+ }
+
+ public static void main(String[] args) throws Exception {
+ FileInputStream fis = new FileInputStream( args[0] );
+ TLVParser p = new TLVParser( fis );
+ p.execute();
+
+ fis.close();
+ }
+}