package org.bouncycastle.asn1;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Enumeration;
import java.util.Vector;

public class BERConstructedOctetString
    extends DEROctetString
{
    private static final int MAX_LENGTH = 1000;

    
convert a vector of octet strings into a single byte string
/** * convert a vector of octet strings into a single byte string */
static private byte[] toBytes( Vector octs) { ByteArrayOutputStream bOut = new ByteArrayOutputStream(); for (int i = 0; i != octs.size(); i++) { try { DEROctetString o = (DEROctetString)octs.elementAt(i); bOut.write(o.getOctets()); } catch (ClassCastException e) { throw new IllegalArgumentException(octs.elementAt(i).getClass().getName() + " found in input should only contain DEROctetString"); } catch (IOException e) { throw new IllegalArgumentException("exception converting octets " + e.toString()); } } return bOut.toByteArray(); } private Vector octs;
Params:
  • string – the octets making up the octet string.
/** * @param string the octets making up the octet string. */
public BERConstructedOctetString( byte[] string) { super(string); } public BERConstructedOctetString( Vector octs) { super(toBytes(octs)); this.octs = octs; } public BERConstructedOctetString( DERObject obj) { super(obj); } public BERConstructedOctetString( DEREncodable obj) { super(obj.getDERObject()); } public byte[] getOctets() { return string; }
return the DER octets that make up this string.
/** * return the DER octets that make up this string. */
public Enumeration getObjects() { if (octs == null) { return generateOcts().elements(); } return octs.elements(); } private Vector generateOcts() { Vector vec = new Vector(); for (int i = 0; i < string.length; i += MAX_LENGTH) { int end; if (i + MAX_LENGTH > string.length) { end = string.length; } else { end = i + MAX_LENGTH; } byte[] nStr = new byte[end - i]; System.arraycopy(string, i, nStr, 0, nStr.length); vec.addElement(new DEROctetString(nStr)); } return vec; } public void encode( DEROutputStream out) throws IOException { if (out instanceof ASN1OutputStream || out instanceof BEROutputStream) { out.write(CONSTRUCTED | OCTET_STRING); out.write(0x80); // // write out the octet array // Enumeration e = getObjects(); while (e.hasMoreElements()) { out.writeObject(e.nextElement()); } out.write(0x00); out.write(0x00); } else { super.encode(out); } } public static BERConstructedOctetString fromSequence(ASN1Sequence seq) { Vector v = new Vector(); Enumeration e = seq.getObjects(); while (e.hasMoreElements()) { v.addElement(e.nextElement()); } return new BERConstructedOctetString(v); } }