зеркало из https://github.com/mozilla/gecko-dev.git
193 строки
6.0 KiB
Java
193 строки
6.0 KiB
Java
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1999 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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package netscape.ldap.ber.stream;
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import java.util.*;
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import java.util.StringTokenizer;
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import java.io.*;
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/**
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* This class is for the Object ID object.
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*
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* @version 1.0
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* @seeAlso CCITT X.209
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*/
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public class BERObjectId extends BERElement {
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/**
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* Values of each component of the OID
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*/
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private int[] m_value = null;
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/**
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* Constructs an object ID element from an array of values.
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* @param value object ID value as array of components
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*/
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public BERObjectId(int[] value) {
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m_value = new int[value.length];
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System.arraycopy(value,0,m_value,0,value.length);
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}
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/**
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* Constructs an object id element from a string.
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* @param value object id value in format "2.100.3"
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*/
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public BERObjectId(String value) {
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StringTokenizer tokenizer = new StringTokenizer(value, ".");
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m_value = new int[tokenizer.countTokens()];
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for (int i=0; i<m_value.length; i++)
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m_value[i] = Integer.parseInt(tokenizer.nextToken());
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}
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/**
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* Constructs an object id element from an input stream.
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* @param stream source
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* @param bytes_read array of 1 int; value incremented by
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* number of bytes read from stream
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* @exception IOException failed to construct
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*/
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public BERObjectId(InputStream stream, int[] bytes_read) throws IOException {
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int contents_length = super.readLengthOctets(stream, bytes_read);
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bytes_read[0] += contents_length;
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int[] contents_read = new int[1];
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Vector oid = new Vector(10);
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contents_read[0] = 0;
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int sub_id = readSubIdentifier(stream, contents_read);
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contents_length -= contents_read[0];
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if (sub_id < 40)
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oid.addElement(new Integer(0));
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else if (sub_id < 80)
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oid.addElement(new Integer(1));
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else
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oid.addElement(new Integer(2));
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oid.addElement(new Integer(
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sub_id - (((Integer)oid.elementAt(
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oid.size()-1)).intValue() * 40)));
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while (contents_length > 0) {
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contents_read[0] = 0;
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sub_id = readSubIdentifier(stream, contents_read);
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contents_length -= contents_read[0];
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oid.addElement(new Integer(sub_id));
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}
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m_value = new int[oid.size()];
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for (int i = 0; i<oid.size(); i++)
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m_value[i] = ((Integer)oid.elementAt(i)).intValue();
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}
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/**
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* Sends the BER encoding directly to a stream. Note that OID must
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* have >= 2 identifier components (values).
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* @param stream output stream
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* @exception IOException failed to write
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*/
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public void write(OutputStream stream) throws IOException {
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stream.write(BERElement.OBJECTID);
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ByteArrayOutputStream contents_stream = new ByteArrayOutputStream();
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/* first subidentifier packs two component values */
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writeSubIdentifier(contents_stream,m_value[0]*40 + m_value[1]);
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for (int i = 2; i < m_value.length; i++) {
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writeSubIdentifier(contents_stream,m_value[i]);
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}
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byte[] contents_buffer = contents_stream.toByteArray();
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sendDefiniteLength(stream, contents_buffer.length);
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stream.write(contents_buffer);
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}
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/**
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* Reads a sub identifier from stream.
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* @param stream input stream
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* @param bytes_read array of 1 int; value incremented by
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* number of bytes read from stream
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*/
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private int readSubIdentifier(InputStream stream, int[] bytes_read)
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throws IOException {
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int octet;
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int sub_id = 0;
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do {
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octet = stream.read();
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bytes_read[0]++;
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sub_id = (sub_id << 7) | (octet & 0x7F);
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} while ((octet & 0x80) > 0);
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return sub_id;
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}
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/**
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* Sends the BER encoding of a sub identifier directly to stream.
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* @param stream output stream
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* @param value sub-identifier value
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*/
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private void writeSubIdentifier(OutputStream stream, int value)
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throws IOException {
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ByteArrayOutputStream sub_id_stream = new ByteArrayOutputStream();
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/* gather octets in reverse order */
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while (value > 0) {
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sub_id_stream.write(value & 0x7F);
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value = value >> 7;
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}
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byte[] sub_id_buffer = sub_id_stream.toByteArray();
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for (int i=sub_id_buffer.length-1; i>0; i--) {
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/* all but last octet have bit 8 = 1 */
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stream.write(sub_id_buffer[i] | 0x80);
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}
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stream.write(sub_id_buffer[0]); /* last octet has bit 8 = 0 */
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}
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/**
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* Gets the element value.
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* @return element value.
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*/
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public int[] getValue() {
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return m_value;
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}
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/**
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* Gets the element type.
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* @return element type.
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*/
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public int getType() {
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return BERElement.OBJECTID;
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}
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/**
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* Gets the string representation.
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* @return string representation of element.
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*/
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public String toString() {
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if (m_value == null)
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return "ObjectIdentifier (null)";
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String oid = "";
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for (int i = 0; i < m_value.length; i++) {
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if (i != 0)
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oid = oid + " ";
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oid = oid + m_value[i];
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}
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return "ObjectIdentifier {" + oid + "}";
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}
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}
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