hextranslator.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:   HexTranslator.java

package jit.util.encoders;


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

public class HexTranslator
    implements Translator
{

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

    public HexTranslator()
    {
    }

    public int getEncodedBlockSize()
    {
        return 2;
    }

    public int encode(byte in[], int inOff, int length, byte out[], int outOff)
    {
        int i = 0;
        for(int j = 0; i < length; j += 2)
        {
            out[outOff + j] = hexTable[in[inOff] >> 4 & 0xf];
            out[outOff + j + 1] = hexTable[in[inOff] & 0xf];
            inOff++;
            i++;
        }

        return length * 2;
    }

    public int getDecodedBlockSize()
    {
        return 1;
    }

    public int decode(byte in[], int inOff, int length, byte out[], int outOff)
    {
        int halfLength = length / 2;
        for(int i = 0; i < halfLength; i++)
        {
            byte left = in[inOff + i * 2];
            byte right = in[inOff + i * 2 + 1];
            if(left < 97)
                out[outOff] = (byte)(left - 48 << 4);
            else
                out[outOff] = (byte)((left - 97) + 10 << 4);
            if(right < 97)
                out[outOff] += (byte)(right - 48);
            else
                out[outOff] += (byte)((right - 97) + 10);
            outOff++;
        }

        return halfLength;
    }

}