hex.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:   Hex.java

package jit.util.encoders;


// Referenced classes of package jit.util.encoders:
//            HexTranslator

public class Hex
{

    private static HexTranslator encoder = new HexTranslator();
    private static final byte hexTable[] = {
        48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 
        97, 98, 99, 100, 101, 102
    };

    public Hex()
    {
    }

    public static byte[] encode(byte array[])
    {
        return encode(array, 0, array.length);
    }

    public static byte[] encode(byte array[], int off, int length)
    {
        byte enc[] = new byte[length * 2];
        encoder.encode(array, off, length, enc, 0);
        return enc;
    }

    public static byte[] decode(String string)
    {
        byte bytes[] = new byte[string.length() / 2];
        String buf = string.toLowerCase();
        for(int i = 0; i < buf.length(); i += 2)
        {
            char left = buf.charAt(i);
            char right = buf.charAt(i + 1);
            int index = i / 2;
            if(left < 'a')
                bytes[index] = (byte)(left - 48 << 4);
            else
                bytes[index] = (byte)((left - 97) + 10 << 4);
            if(right < 'a')
                bytes[index] += (byte)(right - 48);
            else
                bytes[index] += (byte)((right - 97) + 10);
        }

        return bytes;
    }

    public static byte[] decode(byte array[])
    {
        byte bytes[] = new byte[array.length / 2];
        encoder.decode(array, 0, array.length, bytes, 0);
        return bytes;
    }

}