使用MD5加密算法对用户密码进行安全保护
<div class="code_title"><div class="code_title"><div class="code_title"><div class="code_title"><div class="code_title"><div class="code_title"><div class="dp-highlighter"><div class="bar">[*]package com.seagar;
[*]import java.lang.reflect.*;
[*]public class MD5 {
[*] static final int S11 = 7;
[*] static final int S12 = 12;
[*] 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; // state (ABCD)
[*] private long[] count = new long;
[*] private byte[] buffer = new byte; // input buffer
[*] public String digestHexStr;
[*] private byte[] digest = new byte;
[*] public String getMD5ofStr(String inbuf) {
[*] md5Init();
[*] md5Update(inbuf.getBytes(), inbuf.length());
[*] md5Final();
[*] digestHexStr = "";
[*] for (int i = 0; i < 16; i++) {
[*] digestHexStr += byteHEX(digest);
[*] }
[*] return digestHexStr;
[*] }
[*] public MD5() {
[*] md5Init();
[*] return;
[*] }
[*] private void md5Init() {
[*] count = 0L;
[*] count = 0L;
[*] state = 0x67452301L;
[*] state = 0xefcdab89L;
[*] state = 0x98badcfeL;
[*] state = 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;
[*] index = (int) (count >>> 3) & 0x3F;
[*] if ((count += (inputLen << 3)) < (inputLen << 3))
[*] count++;
[*] count += (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;
[*] int index, padLen;
[*] Encode(bits, count, 8);
[*] index = (int) (count >>> 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 = input;
[*] }
[*] private void md5Transform(byte block[]) {
[*] long a = state, b = state, c = state, d = state;
[*] long[] x = new long;
[*] Decode(x, block, 64);
[*] /* Round 1 */
[*] a = FF(a, b, c, d, x, S11, 0xd76aa478L); /* 1 */
[*] d = FF(d, a, b, c, x, S12, 0xe8c7b756L); /* 2 */
[*] c = FF(c, d, a, b, x, S13, 0x242070dbL); /* 3 */
[*] b = FF(b, c, d, a, x, S14, 0xc1bdceeeL); /* 4 */
[*] a = FF(a, b, c, d, x, S11, 0xf57c0fafL); /* 5 */
[*] d = FF(d, a, b, c, x, S12, 0x4787c62aL); /* 6 */
[*] c = FF(c, d, a, b, x, S13, 0xa8304613L); /* 7 */
[*] b = FF(b, c, d, a, x, S14, 0xfd469501L); /* 8 */
[*] a = FF(a, b, c, d, x, S11, 0x698098d8L); /* 9 */
[*] d = FF(d, a, b, c, x, S12, 0x8b44f7afL); /* 10 */
[*] c = FF(c, d, a, b, x, S13, 0xffff5bb1L); /* 11 */
[*] b = FF(b, c, d, a, x, S14, 0x895cd7beL); /* 12 */
[*] a = FF(a, b, c, d, x, S11, 0x6b901122L); /* 13 */
[*] d = FF(d, a, b, c, x, S12, 0xfd987193L); /* 14 */
[*] c = FF(c, d, a, b, x, S13, 0xa679438eL); /* 15 */
[*] b = FF(b, c, d, a, x, S14, 0x49b40821L); /* 16 */
[*] /* Round 2 */
[*] a = GG(a, b, c, d, x, S21, 0xf61e2562L); /* 17 */
[*] d = GG(d, a, b, c, x, S22, 0xc040b340L); /* 18 */
[*] c = GG(c, d, a, b, x, S23, 0x265e5a51L); /* 19 */
[*] b = GG(b, c, d, a, x, S24, 0xe9b6c7aaL); /* 20 */
[*] a = GG(a, b, c, d, x, S21, 0xd62f105dL); /* 21 */
[*] d = GG(d, a, b, c, x, S22, 0x2441453L); /* 22 */
[*] c = GG(c, d, a, b, x, S23, 0xd8a1e681L); /* 23 */
[*] b = GG(b, c, d, a, x, S24, 0xe7d3fbc8L); /* 24 */
[*] a = GG(a, b, c, d, x, S21, 0x21e1cde6L); /* 25 */
[*] d = GG(d, a, b, c, x, S22, 0xc33707d6L); /* 26 */
[*] c = GG(c, d, a, b, x, S23, 0xf4d50d87L); /* 27 */
[*] b = GG(b, c, d, a, x, S24, 0x455a14edL); /* 28 */
[*] a = GG(a, b, c, d, x, S21, 0xa9e3e905L); /* 29 */
[*] d = GG(d, a, b, c, x, S22, 0xfcefa3f8L); /* 30 */
[*] c = GG(c, d, a, b, x, S23, 0x676f02d9L); /* 31 */
[*] b = GG(b, c, d, a, x, S24, 0x8d2a4c8aL); /* 32 */
[*] /* Round 3 */
[*] a = HH(a, b, c, d, x, S31, 0xfffa3942L); /* 33 */
[*] d = HH(d, a, b, c, x, S32, 0x8771f681L); /* 34 */
[*] c = HH(c, d, a, b, x, S33, 0x6d9d6122L); /* 35 */
[*] b = HH(b, c, d, a, x, S34, 0xfde5380cL); /* 36 */
[*] a = HH(a, b, c, d, x, S31, 0xa4beea44L); /* 37 */
[*] d = HH(d, a, b, c, x, S32, 0x4bdecfa9L); /* 38 */
[*] c = HH(c, d, a, b, x, S33, 0xf6bb4b60L); /* 39 */
[*] b = HH(b, c, d, a, x, S34, 0xbebfbc70L); /* 40 */
[*] a = HH(a, b, c, d, x, S31, 0x289b7ec6L); /* 41 */
[*] d = HH(d, a, b, c, x, S32, 0xeaa127faL); /* 42 */
[*] c = HH(c, d, a, b, x, S33, 0xd4ef3085L); /* 43 */
[*] b = HH(b, c, d, a, x, S34, 0x4881d05L); /* 44 */
[*] a = HH(a, b, c, d, x, S31, 0xd9d4d039L); /* 45 */
[*] d = HH(d, a, b, c, x, S32, 0xe6db99e5L); /* 46 */
[*] c = HH(c, d, a, b, x, S33, 0x1fa27cf8L); /* 47 */
[*] b = HH(b, c, d, a, x, S34, 0xc4ac5665L); /* 48 */
[*] /* Round 4 */
[*] a = II(a, b, c, d, x, S41, 0xf4292244L); /* 49 */
[*] d = II(d, a, b, c, x, S42, 0x432aff97L); /* 50 */
[*] c = II(c, d, a, b, x, S43, 0xab9423a7L); /* 51 */
[*] b = II(b, c, d, a, x, S44, 0xfc93a039L); /* 52 */
[*] a = II(a, b, c, d, x, S41, 0x655b59c3L); /* 53 */
[*] d = II(d, a, b, c, x, S42, 0x8f0ccc92L); /* 54 */
[*] c = II(c, d, a, b, x, S43, 0xffeff47dL); /* 55 */
[*] b = II(b, c, d, a, x, S44, 0x85845dd1L); /* 56 */
[*] a = II(a, b, c, d, x, S41, 0x6fa87e4fL); /* 57 */
[*] d = II(d, a, b, c, x, S42, 0xfe2ce6e0L); /* 58 */
[*] c = II(c, d, a, b, x, S43, 0xa3014314L); /* 59 */
[*] b = II(b, c, d, a, x, S44, 0x4e0811a1L); /* 60 */
[*] a = II(a, b, c, d, x, S41, 0xf7537e82L); /* 61 */
[*] d = II(d, a, b, c, x, S42, 0xbd3af235L); /* 62 */
[*] c = II(c, d, a, b, x, S43, 0x2ad7d2bbL); /* 63 */
[*] b = II(b, c, d, a, x, S44, 0xeb86d391L); /* 64 */
[*] state += a;
[*] state += b;
[*] state += c;
[*] state += d;
[*] }
[*] private void Encode(byte[] output, long[] input, int len) {
[*] int i, j;
[*] for (i = 0, j = 0; j < len; i++, j += 4) {
[*] output = (byte) (input & 0xffL);
[*] output = (byte) ((input >>> 8) & 0xffL);
[*] output = (byte) ((input >>> 16) & 0xffL);
[*] output = (byte) ((input >>> 24) & 0xffL);
[*] }
[*] }
[*] private void Decode(long[] output, byte[] input, int len) {
[*] int i, j;
[*] for (i = 0, j = 0; j < len; i++, j += 4)
[*] output = b2iu(input) | (b2iu(input) << 8)
[*] | (b2iu(input) << 16) | (b2iu(input) << 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;
[*] ob = Digit[(ib >>> 4) & 0X0F];
[*] ob = Digit;
[*] String s = new String(ob);
[*] return s;
[*] }
[*] public static void main(String args[]) {
[*] MD5 m = new MD5();
[*] if (Array.getLength(args) == 0) { // 如果没有参数,执行标准的Test Suite
[*] System.out.println("MD5(" + "message digest" + "):"+ m.getMD5ofStr("message digest"));
[*] } else{System.out.println("MD5(" + args + ")=" + m.getMD5ofStr(args));}
[*] }
[*]}
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