package lwp;/** * * @author 梁WP MD5_Encoding{S11 = 7, S12 = 12, S13 = 17, S14 = 22;S21 = 5, S22 = 9, S23 = 14, S24 = 20;S31 = 4, S32 = 11, S33 = 16, S34 = 23;S41 = 6, S42 = 10, S43 = 15, S44 = 21;[] 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};[] state = [] buffer = [] count = new long[2]; // 位个数 String resultStr;[] digest = new byte[16]; String getMD5ofStr(String in){md5Init(); // 初始化md5Update(in.getBytes(), in.length());// 调用MD5的主计算过程md5Final(); (int i = 0; i < 16; i++){resultStr += byteToHEX(digest[i]); // 将digest数组中的每个byte型数据转为16进制形式的字符串}return resultStr;} MD5_Encoding(){md5Init();} md5Init(){state[0] = 0x67452301L; // 定义state为RFC1321中定义的标准幻数state[1] = 0xefcdab89L; // 定义state为RFC1321中定义的标准幻数state[2] = 0x98badcfeL; // 定义state为RFC1321中定义的标准幻数state[3] = 0x10325476L; // 定义state为RFC1321中定义的标准幻数count[0] = count[1] = 0L; // 初始化为0resultStr = “”;(int i = 0; i < 16; i++){digest[i] = 0;//初始化digest数组元素为0}}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));}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)); //这里long型数据右移时使用无符号右移运算符>>>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)); //这里long型数据右移时使用无符号右移运算符>>>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));//这里long型数据右移时使用无符号右移运算符>>>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));//这里long型数据右移时使用无符号右移运算符>>>a += b;return a;}md5Update(byte[] input, int inputLen){int i, index, partLen;byte[] block = new byte[64]; // 分配64个字节缓冲区//根据count计算index值。这里long型数据右移时使用无符号右移运算符>>>index = (int) (count[0] >>> 3) & 0x3F;if ((count[0] += (inputLen << 3)) < (inputLen << 3)){count[1]++;}count[1] += (inputLen >>> 29); //这里int型数据右移时使用无符号右移运算符>>>partLen = 64 – index; (inputLen >= partLen){md5Memcpy(buffer, input, index, 0, partLen);md5Transform(buffer);for (i = partLen; i + 63 < inputLen; i += 64){md5Memcpy(block, input, 0, i, 64);md5Transform(block);}index = 0;}else{i = 0;}md5Memcpy(buffer, input, index, i, inputLen – i);} md5Final(){byte[] bits = new byte[8];int index, padLen;Encode(bits, count, 8);index = (int) (count[0] >>> 3) & 0x3f; //这里long型数据右移时使用无符号右移运算符>>>padLen = (index < 56) ? (56 – index) : (120 – index);md5Update(PADDING, padLen);md5Update(bits, 8);Encode(digest, state, 16);}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];}}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);// 进行4级级联运算// 第1级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;}byteToul(byte b){return b > 0 ? b : (b & 0x7F + 128);}String byteToHEX(byte in){char[] DigitStr ={‘0’, ‘1’, ‘2’, ‘3’, ‘4’, ‘5’, ‘6’, ‘7’, ‘8’, ‘9’,’A’, ‘B’, ‘C’, ‘D’, ‘E’, ‘F’};char[] out = new char[2];out[0] = DigitStr[(in >> 4) & 0x0F]; //取高4位out[1] = DigitStr[in & 0x0F];//取低4位 String s = new String(out);return s;}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);}}Decode(long[] output, byte[] input, int len){int i, j;for (i = 0, j = 0; j < len; i++, j += 4){output[i] = byteToul(input[j])| (byteToul(input[j + 1]) << 8)| (byteToul(input[j + 2]) << 16)| (byteToul(input[j + 3]) << 24);}}}，美国服务器，网站空间，美国服务器用最少的悔恨面对过去
MD5加密 Java源代码
