Java Encode encodeOID(byte[] in, OutputStream os)

Description

encode OID

License

Open Source License

Declaration

public static void encodeOID(byte[] in, OutputStream os) throws IOException

Method Source Code

//package com.java2s;
/**//  w w  w .j  a v a  2 s.c  o m
   DERUtils.java
    
   Copyright (C) 1999, Claymore Systems, Inc.
   All Rights Reserved.
    
   ekr@rtfm.com  Sat Jul 24 21:24:06 1999
    
   This package is a SSLv3/TLS implementation written by Eric Rescorla
   <ekr\@rtfm.com> and licensed by Claymore Systems, Inc.
    
   Redistribution and use in source and binary forms, with or without
   modification, 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. All advertising materials mentioning features or use of this software
  must display the following acknowledgement:
  This product includes software developed by Claymore Systems, Inc.
   4. Neither the name of Claymore Systems, Inc. nor the name of Eric
  Rescorla may be used to endorse or promote products derived from this
  software without specific prior written permission.
    
   THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   ANY EXPRESS 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 REGENTS OR CONTRIBUTORS BE LIABLE
   FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   DAMAGES (INCLUDING, 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.
    
    
   $Id: DERUtils.java,v 1.1.1.1 2003/05/09 20:36:14 gawor Exp $
    
*/

import java.util.StringTokenizer;

import java.io.*;

public class Main {
    public static final byte OID = 6;

    public static void encodeOID(byte[] in, OutputStream os) throws IOException {
        encodeBytes(OID, in, os);
    }

    public static void encodeOID(String oid, OutputStream os) throws IOException {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();

        StringTokenizer tok = new StringTokenizer(oid, ".");
        int[] components = new int[tok.countTokens()];
        for (int i = 0; i < components.length; i++) {
            components[i] = Integer.parseInt(tok.nextToken());
        }

        bos.write(components[0] * 40 + components[1]); // Yuck!

        for (int i = 2; i < components.length; i++) {
            encodeBase128(components[i], bos);
        }

        byte[] tmp = bos.toByteArray();
        encodeOID(tmp, os);
    }

    private static void encodeBytes(byte type, byte[] in, OutputStream os) throws IOException {
        os.write(type);
        writeLength(in.length, os);
        os.write(in);
    }

    private static void encodeBase128(int num, OutputStream os) throws IOException {
        byte tmp[] = new byte[6];
        int i;

        for (i = 0; i < 6; i++) {
            tmp[i] = (byte) (num & 0x7f);
            num >>= 7;

            if (num == 0)
                break;
        }

        for (int j = i; j >= 0; j--) {
            if (j == 0) {
                os.write(tmp[j]);
            } else {
                os.write(tmp[j] | 0x80);
            }
        }
    }

    private static void writeLength(int length, OutputStream os) throws IOException {
        if (length < 128) {
            os.write((byte) length);
        } else {
            ByteArrayOutputStream bs = new ByteArrayOutputStream();
            int i;

            for (i = 1; length > 0; i++) {
                bs.write((byte) (length & 0xff));
                length >>= 8;
            }

            byte[] b = bs.toByteArray();
            os.write((byte) (0x80 | b.length));

            for (i = 0; i < b.length; i++) {
                os.write(b[b.length - (i + 1)]);
            }
        }
    }
}

Java Encode encodeOID(byte[] in, OutputStream os)

Description

License

Declaration

Method Source Code

Related