deroctetstring.java

来自「《移动Agent技术》一书的所有章节源代码。」· Java 代码 · 共 98 行

package org.bouncycastle.asn1;

import java.io.*;

public class DEROctetString
    extends DERObject
{
    byte[]  string;

    /**
     * @param string the octets making up the octet string.
     */
    public DEROctetString(
        byte[]  string)
    {
        this.string = string;
    }

    public DEROctetString(
        DERObject  obj)
    {
        try
        {
            ByteArrayOutputStream   bOut = new ByteArrayOutputStream();
            DEROutputStream         dOut = new DEROutputStream(bOut);

            dOut.writeObject(obj);
            dOut.close();

            this.string = bOut.toByteArray();
        }
        catch (IOException e)
        {
            throw new IllegalArgumentException("Error processing object : " + e.toString());
        }
    }

    public DEROctetString(
        DEREncodable  obj)
    {
        this(obj.getDERObject());
    }

    public byte[] getOctets()
    {
        return string;
    }

    void encode(
        DEROutputStream out)
        throws IOException
    {
        out.writeEncoded(OCTET_STRING, string);
    }

    public int hashCode()
    {
        byte[]  b = this.getOctets();
        int     value = 0;

        for (int i = 0; i != b.length; i++)
        {
            value ^= (b[i] & 0xff) << (i % 4);
        }

        return value;
    }

    public boolean equals(
        Object  o)
    {
        if (o == null || !(o instanceof DEROctetString))
        {
            return false;
        }

        DEROctetString  other = (DEROctetString)o;

        if (other.getOctets().length != this.getOctets().length)
        {
            return false;
        }

        byte[]  b1 = other.getOctets();
        byte[]  b2 = this.getOctets();

        for (int i = 0; i != b1.length; i++)
        {
            if (b1[i] != b2[i])
            {
                return false;
            }
        }

        return true;
    }
}