berconstructedoctetstring.java

进行与数字证书相关开发必须的java源码

// Decompiled by Jad v1.5.7g. Copyright 2000 Pavel Kouznetsov.
// Jad home page: http://www.geocities.com/SiliconValley/Bridge/8617/jad.html
// Decompiler options: packimports(3) fieldsfirst ansi 
// Source File Name:   BERConstructedOctetString.java

package jit.asn1;

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

// Referenced classes of package jit.asn1:
//            DEROctetString, ASN1OutputStream, BEROutputStream, DEREncodable, 
//            ASN1OctetString, DEROutputStream, DERObject

public class BERConstructedOctetString extends DEROctetString
{

    private Vector octs;

    private static byte[] toBytes(Vector octs)
    {
        ByteArrayOutputStream bOut = new ByteArrayOutputStream();
        for(int i = 0; i != octs.size(); i++)
        {
            DEROctetString o = (DEROctetString)octs.elementAt(i);
            try
            {
                bOut.write(o.getOctets());
            }
            catch(IOException e)
            {
                throw new RuntimeException("exception converting octets ".concat(String.valueOf(String.valueOf(e.toString()))));
            }
        }

        return bOut.toByteArray();
    }

    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;
    }

    public Enumeration getObjects()
    {
        if(octs == null)
            return generateOcts().elements();
        else
            return octs.elements();
    }

    private Vector generateOcts()
    {
        int start = 0;
        int end = 0;
        Vector vec = new Vector();
        byte nStr[];
        for(; end + 1 < string.length; end++)
            if(string[end] == 0 && string[end + 1] == 0)
            {
                nStr = new byte[(end - start) + 1];
                System.arraycopy(string, start, nStr, 0, nStr.length);
                vec.addElement(new DEROctetString(nStr));
                start = end + 1;
            }

        nStr = new byte[string.length - start];
        System.arraycopy(string, start, 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(36);
            out.write(128);
            if(octs != null)
            {
                for(int i = 0; i != octs.size(); i++)
                    out.writeObject(octs.elementAt(i));

            } else
            {
                int start = 0;
                byte nStr[];
                for(int end = 0; end + 1 < string.length; end++)
                    if(string[end] == 0 && string[end + 1] == 0)
                    {
                        nStr = new byte[(end - start) + 1];
                        System.arraycopy(string, start, nStr, 0, nStr.length);
                        out.writeObject(new DEROctetString(nStr));
                        start = end + 1;
                    }

                nStr = new byte[string.length - start];
                System.arraycopy(string, start, nStr, 0, nStr.length);
                out.writeObject(new DEROctetString(nStr));
            }
            out.write(0);
            out.write(0);
        } else
        {
            super.encode(out);
        }
    }
}