md5.java

在管理员表中初始插入数据 usn: admin, pwd: 21232F297A57A5A743894A0E4A801FC3 初始用户账号/密码: admin (密码为 md5 加密) SRC

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

public class MD5 {
    static final int S12 = 12;
    static final int S11 = 7;
    static final int S13 = 17;
    static final int S14 = 22;
    static final int S21 = 5;
    static final int S22 = 9;
    static final int S23 = 14;
    static final int S24 = 20;
    static final int S31 = 4;
    static final int S32 = 11;
    static final int S33 = 16;
    static final int S34 = 23;
    static final int S41 = 6;
    static final int S42 = 10;
    static final int S43 = 15;
    static final int S44 = 21;
    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 };

    private long[] state = new long[4];
    private long[] count = new long[2];
    private byte[] buffer = new byte[64];


    public String digestHexStr;

    private byte[] digest = new byte[16];

    public String hashOfStr(String inbuf) {
        md5Init();
        md5Update(inbuf.getBytes(), inbuf.length());
        md5Final();
        digestHexStr = "";
        for (int i = 0; i < 16; i++) {
            digestHexStr += byteHEX(digest[i]);
        }
        return digestHexStr;
    }
    
    public String hashOfFile(File f) {
        byte[] myByte;
        try {
			FileInputStream in = new FileInputStream(f);
			myByte = new byte[in.available()];
			in.read(myByte);
			in.close();
		} catch(IOException e) {
			e.printStackTrace();
			return "";
		}
        md5Init();
        md5Update(myByte, myByte.length);
        md5Final();
        digestHexStr = "";
        for (int i = 0; i < 16; i++) {
            digestHexStr += byteHEX(digest[i]);
        }
        return digestHexStr;
    }
    
    public MD5() {
        md5Init();
        return;
    }

    private void md5Init() {
        count[0] = 0L;
        count[1] = 0L;
        ///* Load magic initialization constants.
        state[0] = 0x67452301L;
        state[1] = 0xefcdab89L;
        state[2] = 0x98badcfeL;
        state[3] = 0x10325476L;
        return;
    }

    private long F(long x, long y, long z) { return (x & y) | ((~x) & z); }
    private long G(long x, long y, long z) { return (x & z) | (y & (~z)); }
    private long H(long x, long y, long z) { return x ^ y ^ z; }
    private long I(long x, long y, long z) { return y ^ (x | (~z)); }

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

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

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

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

    private void md5Update(byte[] inbuf, int inputLen) {
        int i, index, partLen;
        byte[] block = new byte[64];
        index = (int)(count[0] >>> 3) & 0x3F;
        if ((count[0] += (inputLen << 3)) < (inputLen << 3))
            count[1] ++;
        count[1] += (inputLen >>> 29);
        partLen = 64 - index;
        if (inputLen >= partLen) {
            md5Memcpy(buffer, inbuf, index, 0, partLen);
            md5Transform(buffer);
            for (i = partLen; i + 63 < inputLen; i += 64) {
                md5Memcpy(block, inbuf, 0, i, 64);
                md5Transform(block);
            }
            index = 0;
        } else
            i = 0;
        md5Memcpy(buffer, inbuf, index, i, inputLen - i);
    }

    private void md5Final() {
        byte[] bits = new byte[8];
        int index, padLen;
        Encode(bits, count, 8);
        index = (int)(count[0] >>> 3) & 0x3f;
        padLen = (index < 56) ? (56 - index) : (120 - index);
        md5Update(PADDING, padLen);
        md5Update(bits, 8);
        Encode(digest, state, 16);
    }

    private void md5Memcpy(byte[] output, byte[] input, int outpos, int inpos, int len) {
        int i;
        for (i = 0; i < len; i++)
            output[outpos + i] = input[inpos + i];
    }
    
    private void md5Transform(byte[] block) {
        long a = state[0], b = state[1], c = state[2], d = state[3];
        long[] x = new long[16];
        Decode(x, block, 64);

        a = FF(a, b, c, d, x[0], S11, 0xd76aa478L);
        d = FF(d, a, b, c, x[1], S12, 0xe8c7b756L);
        c = FF(c, d, a, b, x[2], S13, 0x242070dbL);
        b = FF(b, c, d, a, x[3], S14, 0xc1bdceeeL);
        a = FF(a, b, c, d, x[4], S11, 0xf57c0fafL);
        d = FF(d, a, b, c, x[5], S12, 0x4787c62aL);
        c = FF(c, d, a, b, x[6], S13, 0xa8304613L);
        b = FF(b, c, d, a, x[7], S14, 0xfd469501L);
        a = FF(a, b, c, d, x[8], S11, 0x698098d8L);
        d = FF(d, a, b, c, x[9], S12, 0x8b44f7afL);
        c = FF(c, d, a, b, x[10], S13, 0xffff5bb1L);
        b = FF(b, c, d, a, x[11], S14, 0x895cd7beL);
        a = FF(a, b, c, d, x[12], S11, 0x6b901122L);
        d = FF(d, a, b, c, x[13], S12, 0xfd987193L);
        c = FF(c, d, a, b, x[14], S13, 0xa679438eL);
        b = FF(b, c, d, a, x[15], S14, 0x49b40821L);
        a = GG(a, b, c, d, x[1], S21, 0xf61e2562L);
        d = GG(d, a, b, c, x[6], S22, 0xc040b340L);
        c = GG(c, d, a, b, x[11], S23, 0x265e5a51L);
        b = GG(b, c, d, a, x[0], S24, 0xe9b6c7aaL);
        a = GG(a, b, c, d, x[5], S21, 0xd62f105dL);
        d = GG(d, a, b, c, x[10], S22, 0x2441453L);
        c = GG(c, d, a, b, x[15], S23, 0xd8a1e681L);
        b = GG(b, c, d, a, x[4], S24, 0xe7d3fbc8L);
        a = GG(a, b, c, d, x[9], S21, 0x21e1cde6L);
        d = GG(d, a, b, c, x[14], S22, 0xc33707d6L);
        c = GG(c, d, a, b, x[3], S23, 0xf4d50d87L);
        b = GG(b, c, d, a, x[8], S24, 0x455a14edL);
        a = GG(a, b, c, d, x[13], S21, 0xa9e3e905L);
        d = GG(d, a, b, c, x[2], S22, 0xfcefa3f8L);
        c = GG(c, d, a, b, x[7], S23, 0x676f02d9L);
        b = GG(b, c, d, a, x[12], S24, 0x8d2a4c8aL);
        a = HH(a, b, c, d, x[5], S31, 0xfffa3942L);
        d = HH(d, a, b, c, x[8], S32, 0x8771f681L);
        c = HH(c, d, a, b, x[11], S33, 0x6d9d6122L);
        b = HH(b, c, d, a, x[14], S34, 0xfde5380cL);
        a = HH(a, b, c, d, x[1], S31, 0xa4beea44L);
        d = HH(d, a, b, c, x[4], S32, 0x4bdecfa9L);
        c = HH(c, d, a, b, x[7], S33, 0xf6bb4b60L);
        b = HH(b, c, d, a, x[10], S34, 0xbebfbc70L);
        a = HH(a, b, c, d, x[13], S31, 0x289b7ec6L);
        d = HH(d, a, b, c, x[0], S32, 0xeaa127faL);
        c = HH(c, d, a, b, x[3], S33, 0xd4ef3085L);
        b = HH(b, c, d, a, x[6], S34, 0x4881d05L);
        a = HH(a, b, c, d, x[9], S31, 0xd9d4d039L);
        d = HH(d, a, b, c, x[12], S32, 0xe6db99e5L);
        c = HH(c, d, a, b, x[15], S33, 0x1fa27cf8L);
        b = HH(b, c, d, a, x[2], S34, 0xc4ac5665L);
        a = II(a, b, c, d, x[0], S41, 0xf4292244L);
        d = II(d, a, b, c, x[7], S42, 0x432aff97L);
        c = II(c, d, a, b, x[14], S43, 0xab9423a7L);
        b = II(b, c, d, a, x[5], S44, 0xfc93a039L);
        a = II(a, b, c, d, x[12], S41, 0x655b59c3L);
        d = II(d, a, b, c, x[3], S42, 0x8f0ccc92L);
        c = II(c, d, a, b, x[10], S43, 0xffeff47dL);
        b = II(b, c, d, a, x[1], S44, 0x85845dd1L);
        a = II(a, b, c, d, x[8], S41, 0x6fa87e4fL);
        d = II(d, a, b, c, x[15], S42, 0xfe2ce6e0L);
        c = II(c, d, a, b, x[6], S43, 0xa3014314L);
        b = II(b, c, d, a, x[13], S44, 0x4e0811a1L);
        a = II(a, b, c, d, x[4], S41, 0xf7537e82L);
        d = II(d, a, b, c, x[11], S42, 0xbd3af235L);
        c = II(c, d, a, b, x[2], S43, 0x2ad7d2bbL);
        b = II(b, c, d, a, x[9], S44, 0xeb86d391L);

        state[0] += a;
        state[1] += b;
        state[2] += c;
        state[3] += d;
    }

    private void Encode(byte[] output, long[] input, int len) {
        int i, j;
        for (i = 0, j = 0; j < len; i++, j += 4) {
            output[j] = (byte)(input[i] & 0xffL);
            output[j + 1] = (byte)((input[i] >>> 8) & 0xffL);
            output[j + 2] = (byte)((input[i] >>> 16) & 0xffL);
            output[j + 3] = (byte)((input[i] >>> 24) & 0xffL);
        }
    }

    private void Decode(long[] output, byte[] input, int len) {
        int i = 0, j = 0;
        for (i = 0, j = 0; j < len; i++, j += 4)
            output[i] = b2iu(input[j]) | (b2iu(input[j + 1]) << 8) | (b2iu(input[j + 2]) << 16) | (b2iu(input[j + 3]) << 24);
        return;
    }


    public static long b2iu(byte b) {
        return b < 0 ? b & 0x7F + 128 : b;
    }

    public static String byteHEX(byte ib) {
        char[] Digit = { '0','1','2','3','4','5','6','7','8','9',
                'A','B','C','D','E','F' };
        char[] ob = new char[2];
        ob[0] = Digit[(ib >>> 4) & 0X0F];
        ob[1] = Digit[ib & 0X0F];
        String s = new String(ob);
        return s;
    }

    public String encode(String s) {
        return s;
    }

    public String decode(String s) {
        return hashOfStr(s);
    }
    
    public static void main(String[] args) {
    	System.out.println(new MD5().hashOfStr("admin"));
    }
        
}