md5.java

j2me写的google地图

// Decompiled by DJ v3.7.7.81 Copyright 2004 Atanas Neshkov  Date: 2008-6-16 11:25:26
// Home Page : http://members.fortunecity.com/neshkov/dj.html  - Check often for new version!
// Decompiler options: packimports(3) 
// Source File Name:   MD5.java

package com.eightmotions.util;

import java.io.*;

public class MD5
{
    private class MD5State
    {

        public void reset()
        {
            state[0] = 0x67452301;
            state[1] = 0xefcdab89;
            state[2] = 0x98badcfe;
            state[3] = 0x10325476;
            bitCount = 0L;
        }

        public void copy(MD5State from)
        {
            System.arraycopy(from.buffer, 0, buffer, 0, buffer.length);
            System.arraycopy(from.state, 0, state, 0, state.length);
            valid = from.valid;
            bitCount = from.bitCount;
        }

        public String toString()
        {
            return state[0] + " " + state[1] + " " + state[2] + " " + state[3];
        }

        public boolean valid;
        public int state[];
        public long bitCount;
        public byte buffer[];

        public MD5State()
        {
            valid = true;
            state = new int[4];
            buffer = new byte[64];
            reset();
        }
    }


    public MD5()
    {
        workingState = new MD5State();
        finalState = new MD5State();
        decodeBuffer = new int[16];
        reset();
    }

    public byte[] getHash()
    {
        if(!finalState.valid)
        {
            finalState.copy(workingState);
            long bitCount = finalState.bitCount;
            int leftOver = (int)(bitCount >>> 3 & 63L);
            int padlen = leftOver >= 56 ? 120 - leftOver : 56 - leftOver;
            update(finalState, padding, 0, padlen);
            update(finalState, encode(bitCount), 0, 8);
            finalState.valid = true;
        }
        return encode(finalState.state, 16);
    }

    public String getHashString()
    {
        return toHex(getHash());
    }

    public static byte[] getHash(byte b[])
    {
        MD5 md5 = new MD5();
        md5.update(b);
        return md5.getHash();
    }

    public static String getHashString(byte b[])
    {
        MD5 md5 = new MD5();
        md5.update(b);
        return md5.getHashString();
    }

    public static byte[] getHash(InputStream in)
        throws IOException
    {
        MD5 md5 = new MD5();
        byte buffer[] = new byte[1024];
        int read;
        while((read = in.read(buffer)) != -1) 
            md5.update(buffer, read);
        return md5.getHash();
    }

    public static String getHashString(InputStream in)
        throws IOException
    {
        MD5 md5 = new MD5();
        byte buffer[] = new byte[1024];
        int read;
        while((read = in.read(buffer)) != -1) 
            md5.update(buffer, read);
        return md5.getHashString();
    }

    public static byte[] getHash(String s)
    {
        MD5 md5 = new MD5();
        md5.update(s);
        return md5.getHash();
    }

    public static String getHashString(String s)
    {
        MD5 md5 = new MD5();
        md5.update(s);
        return md5.getHashString();
    }

    public static byte[] getHash(String s, String enc)
        throws UnsupportedEncodingException
    {
        MD5 md5 = new MD5();
        md5.update(s, enc);
        return md5.getHash();
    }

    public static String getHashString(String s, String enc)
        throws UnsupportedEncodingException
    {
        MD5 md5 = new MD5();
        md5.update(s, enc);
        return md5.getHashString();
    }

    public void reset()
    {
        workingState.reset();
        finalState.valid = false;
    }

    public String toString()
    {
        return getHashString();
    }

    private void update(MD5State state, byte buffer[], int offset, int length)
    {
        finalState.valid = false;
        if(length + offset > buffer.length)
            length = buffer.length - offset;
        int index = (int)(state.bitCount >>> 3) & 0x3f;
        state.bitCount += length << 3;
        int partlen = 64 - index;
        int i = 0;
        if(length >= partlen)
        {
            System.arraycopy(buffer, offset, state.buffer, index, partlen);
            transform(state, decode(state.buffer, 64, 0));
            for(i = partlen; i + 63 < length; i += 64)
                transform(state, decode(buffer, 64, i));

            index = 0;
        }
        if(i < length)
        {
            int start = i;
            for(; i < length; i++)
                state.buffer[(index + i) - start] = buffer[i + offset];

        }
    }

    public void update(byte buffer[], int offset, int length)
    {
        update(workingState, buffer, offset, length);
    }

    public void update(byte buffer[], int length)
    {
        update(buffer, 0, length);
    }

    public void update(byte buffer[])
    {
        update(buffer, 0, buffer.length);
    }

    public void update(byte b)
    {
        byte buffer[] = new byte[1];
        buffer[0] = b;
        update(buffer, 1);
    }

    private void update(MD5State state, long l)
    {
        update(state, new byte[] {
            (byte)(int)(l >>> 0 & 255L), (byte)(int)(l >>> 8 & 255L), (byte)(int)(l >>> 16 & 255L), (byte)(int)(l >>> 24 & 255L), (byte)(int)(l >>> 32 & 255L), (byte)(int)(l >>> 40 & 255L), (byte)(int)(l >>> 48 & 255L), (byte)(int)(l >>> 56 & 255L)
        }, 0, 8);
    }

    public void update(String s)
    {
        update(s.getBytes());
    }

    public void update(String s, String enc)
        throws UnsupportedEncodingException
    {
        update(s.getBytes(enc));
    }

    private static String toHex(byte hash[])
    {
        StringBuffer buf = new StringBuffer(hash.length * 2);
        for(int i = 0; i < hash.length; i++)
        {
            int intVal = hash[i] & 0xff;
            if(intVal < 16)
                buf.append("0");
            buf.append(Integer.toHexString(intVal));
        }

        return buf.toString();
    }

    private static int FF(int a, int b, int c, int d, int x, int s, int ac)
    {
        a += b & c | ~b & d;
        a += x;
        a += ac;
        a = a << s | a >>> 32 - s;
        return a + b;
    }

    private static int GG(int a, int b, int c, int d, int x, int s, int ac)
    {
        a += b & d | c & ~d;
        a += x;
        a += ac;
        a = a << s | a >>> 32 - s;
        return a + b;
    }

    private static int HH(int a, int b, int c, int d, int x, int s, int ac)
    {
        a += b ^ c ^ d;
        a += x;
        a += ac;
        a = a << s | a >>> 32 - s;
        return a + b;
    }

    private static int II(int a, int b, int c, int d, int x, int s, int ac)
    {
        a += c ^ (b | ~d);
        a += x;
        a += ac;
        a = a << s | a >>> 32 - s;
        return a + b;
    }

    private static byte[] encode(long l)
    {
        byte out[] = new byte[8];
        out[0] = (byte)(int)(l & 255L);
        out[1] = (byte)(int)(l >>> 8 & 255L);
        out[2] = (byte)(int)(l >>> 16 & 255L);
        out[3] = (byte)(int)(l >>> 24 & 255L);
        out[4] = (byte)(int)(l >>> 32 & 255L);
        out[5] = (byte)(int)(l >>> 40 & 255L);
        out[6] = (byte)(int)(l >>> 48 & 255L);
        out[7] = (byte)(int)(l >>> 56 & 255L);
        return out;
    }

    private static byte[] encode(int input[], int len)
    {
        byte out[] = new byte[len];
        int j;
        int i = j = 0;
        for(; j < len; j += 4)
        {
            out[j] = (byte)(input[i] & 0xff);
            out[j + 1] = (byte)(input[i] >>> 8 & 0xff);
            out[j + 2] = (byte)(input[i] >>> 16 & 0xff);
            out[j + 3] = (byte)(input[i] >>> 24 & 0xff);
            i++;
        }

        return out;
    }

    private int[] decode(byte buffer[], int len, int offset)
    {
        int j;
        int i = j = 0;
        for(; j < len; j += 4)
        {
            decodeBuffer[i] = buffer[j + offset] & 0xff | (buffer[j + 1 + offset] & 0xff) << 8 | (buffer[j + 2 + offset] & 0xff) << 16 | (buffer[j + 3 + offset] & 0xff) << 24;
            i++;
        }

        return decodeBuffer;
    }

    private static void transform(MD5State state, int x[])
    {
        int a = state.state[0];
        int b = state.state[1];
        int c = state.state[2];
        int d = state.state[3];
        a = FF(a, b, c, d, x[0], 7, 0xd76aa478);
        d = FF(d, a, b, c, x[1], 12, 0xe8c7b756);
        c = FF(c, d, a, b, x[2], 17, 0x242070db);
        b = FF(b, c, d, a, x[3], 22, 0xc1bdceee);
        a = FF(a, b, c, d, x[4], 7, 0xf57c0faf);
        d = FF(d, a, b, c, x[5], 12, 0x4787c62a);
        c = FF(c, d, a, b, x[6], 17, 0xa8304613);
        b = FF(b, c, d, a, x[7], 22, 0xfd469501);
        a = FF(a, b, c, d, x[8], 7, 0x698098d8);
        d = FF(d, a, b, c, x[9], 12, 0x8b44f7af);
        c = FF(c, d, a, b, x[10], 17, -42063);
        b = FF(b, c, d, a, x[11], 22, 0x895cd7be);
        a = FF(a, b, c, d, x[12], 7, 0x6b901122);
        d = FF(d, a, b, c, x[13], 12, 0xfd987193);
        c = FF(c, d, a, b, x[14], 17, 0xa679438e);
        b = FF(b, c, d, a, x[15], 22, 0x49b40821);
        a = GG(a, b, c, d, x[1], 5, 0xf61e2562);
        d = GG(d, a, b, c, x[6], 9, 0xc040b340);
        c = GG(c, d, a, b, x[11], 14, 0x265e5a51);
        b = GG(b, c, d, a, x[0], 20, 0xe9b6c7aa);
        a = GG(a, b, c, d, x[5], 5, 0xd62f105d);
        d = GG(d, a, b, c, x[10], 9, 0x2441453);
        c = GG(c, d, a, b, x[15], 14, 0xd8a1e681);
        b = GG(b, c, d, a, x[4], 20, 0xe7d3fbc8);
        a = GG(a, b, c, d, x[9], 5, 0x21e1cde6);
        d = GG(d, a, b, c, x[14], 9, 0xc33707d6);
        c = GG(c, d, a, b, x[3], 14, 0xf4d50d87);
        b = GG(b, c, d, a, x[8], 20, 0x455a14ed);
        a = GG(a, b, c, d, x[13], 5, 0xa9e3e905);
        d = GG(d, a, b, c, x[2], 9, 0xfcefa3f8);
        c = GG(c, d, a, b, x[7], 14, 0x676f02d9);
        b = GG(b, c, d, a, x[12], 20, 0x8d2a4c8a);
        a = HH(a, b, c, d, x[5], 4, 0xfffa3942);
        d = HH(d, a, b, c, x[8], 11, 0x8771f681);
        c = HH(c, d, a, b, x[11], 16, 0x6d9d6122);
        b = HH(b, c, d, a, x[14], 23, 0xfde5380c);
        a = HH(a, b, c, d, x[1], 4, 0xa4beea44);
        d = HH(d, a, b, c, x[4], 11, 0x4bdecfa9);
        c = HH(c, d, a, b, x[7], 16, 0xf6bb4b60);
        b = HH(b, c, d, a, x[10], 23, 0xbebfbc70);
        a = HH(a, b, c, d, x[13], 4, 0x289b7ec6);
        d = HH(d, a, b, c, x[0], 11, 0xeaa127fa);
        c = HH(c, d, a, b, x[3], 16, 0xd4ef3085);
        b = HH(b, c, d, a, x[6], 23, 0x4881d05);
        a = HH(a, b, c, d, x[9], 4, 0xd9d4d039);
        d = HH(d, a, b, c, x[12], 11, 0xe6db99e5);
        c = HH(c, d, a, b, x[15], 16, 0x1fa27cf8);
        b = HH(b, c, d, a, x[2], 23, 0xc4ac5665);
        a = II(a, b, c, d, x[0], 6, 0xf4292244);
        d = II(d, a, b, c, x[7], 10, 0x432aff97);
        c = II(c, d, a, b, x[14], 15, 0xab9423a7);
        b = II(b, c, d, a, x[5], 21, 0xfc93a039);
        a = II(a, b, c, d, x[12], 6, 0x655b59c3);
        d = II(d, a, b, c, x[3], 10, 0x8f0ccc92);
        c = II(c, d, a, b, x[10], 15, 0xffeff47d);
        b = II(b, c, d, a, x[1], 21, 0x85845dd1);
        a = II(a, b, c, d, x[8], 6, 0x6fa87e4f);
        d = II(d, a, b, c, x[15], 10, 0xfe2ce6e0);
        c = II(c, d, a, b, x[6], 15, 0xa3014314);
        b = II(b, c, d, a, x[13], 21, 0x4e0811a1);
        a = II(a, b, c, d, x[4], 6, 0xf7537e82);
        d = II(d, a, b, c, x[11], 10, 0xbd3af235);
        c = II(c, d, a, b, x[2], 15, 0x2ad7d2bb);
        b = II(b, c, d, a, x[9], 21, 0xeb86d391);
        state.state[0] += a;
        state.state[1] += b;
        state.state[2] += c;
        state.state[3] += d;
    }

    private MD5State workingState;
    private MD5State finalState;
    private int decodeBuffer[];
    private static final byte padding[] = {
        -128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
        0, 0, 0, 0
    };

}