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package woxingwosu;
/************************************************
* MD5 算法 * @author 我行我素 * @Date 2007-07-01
*************************************************/public class MD5 {
static final String hexs[]={"0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F"}; //标准的幻数 private static final long A=0x67452301L; private static final long B=0xefcdab89L; private static final long C=0x98badcfeL; private static final long D=0x10325476L; //以下这些S11-S44实际上是一个4*4的矩阵，在四轮循环运算中用到 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; //java不支持无符号的基本数据（unsigned） private long [] result={A,B,C,D};//存储hash结果，共4×32=128位，初始化值为（幻数的级联） public static void main(String []args){ MD5 md=new MD5(); System.out.println("md5(abc)="+md.digest("abc"));
} private String digest(String inputStr){ byte [] inputBytes=inputStr.getBytes(); int byteLen=inputBytes.length;//长度（字节） int groupCount=0;//完整分组的个数 groupCount=byteLen/64;//每组512位（64字节） long []groups=null;//每一个小组(64字节)再细分后的16个小组(4字节) //处理每个完整 分组 for(int step=0;step<groupCount;step++){ groups=divGroup(inputBytes,step*64); trans(groups);//处理分组，核心算法 } //处理完整分组后的尾巴 int rest=byteLen%64;//512位分组后的余数 byte [] tempBytes=new byte[64]; if(rest<=56){ for(int i=0;i<rest;i++) tempBytes[i]=inputBytes[byteLen-rest+i]; if(rest<56){ tempBytes[rest]=(byte)(1<<7); for(int i=1;i<56-rest;i++) tempBytes[rest+i]=0; } long len=(long)(byteLen<<3); for(int i=0;i<8;i++){ tempBytes[56+i]=(byte)(len&0xFFL); len=len>>8; } groups=divGroup(tempBytes,0); trans(groups);//处理分组 }else{ for(int i=0;i<rest;i++) tempBytes[i]=inputBytes[byteLen-rest+i]; tempBytes[rest]=(byte)(1<<7); for(int i=rest+1;i<64;i++) tempBytes[i]=0; groups=divGroup(tempBytes,0); trans(groups);//处理分组 for(int i=0;i<56;i++) tempBytes[i]=0; long len=(long)(byteLen<<3); for(int i=0;i<8;i++){ tempBytes[56+i]=(byte)(len&0xFFL); len=len>>8; } groups=divGroup(tempBytes,0); trans(groups);//处理分组 } //将Hash值转换成十六进制的字符串 String resStr=""; long temp=0; for(int i=0;i<4;i++){ for(int j=0;j<4;j++){ temp=result[i]&0x0FL; String a=hexs[(int)(temp)]; result[i]=result[i]>>4; temp=result[i]&0x0FL; resStr+=hexs[(int)(temp)]+a; result[i]=result[i]>>4; } } return resStr; } /** * 从inputBytes的index開始取512位，作为新的分组 * 将每个512位的分组再细分成16个小组，每个小组64位（8个字节） * @param inputBytes * @param index * @return */ private static long[] divGroup(byte[] inputBytes,int index){ long [] temp=new long[16]; for(int i=0;i<16;i++){ temp[i]=b2iu(inputBytes[4*i+index])| (b2iu(inputBytes[4*i+1+index]))<<8| (b2iu(inputBytes[4*i+2+index]))<<16| (b2iu(inputBytes[4*i+3+index]))<<24; } return temp; } /** * 这时不存在符号位（符号位存储不再是代表正负），所以须要处理一下 * @param b * @return */ public static long b2iu(byte b){ return b < 0 ? b & 0x7F + 128 : b; } /** * 基本的操作，四轮循环 * @param groups[]--每个分组512位（64字节） */ private void trans(long[] groups) { long a = result[0], b = result[1], c = result[2], d = result[3]; /*第一轮*/ a = FF(a, b, c, d, groups[0], S11, 0xd76aa478L); /* 1 */ d = FF(d, a, b, c, groups[1], S12, 0xe8c7b756L); /* 2 */ c = FF(c, d, a, b, groups[2], S13, 0x242070dbL); /* 3 */ b = FF(b, c, d, a, groups[3], S14, 0xc1bdceeeL); /* 4 */ a = FF(a, b, c, d, groups[4], S11, 0xf57c0fafL); /* 5 */ d = FF(d, a, b, c, groups[5], S12, 0x4787c62aL); /* 6 */ c = FF(c, d, a, b, groups[6], S13, 0xa8304613L); /* 7 */ b = FF(b, c, d, a, groups[7], S14, 0xfd469501L); /* 8 */ a = FF(a, b, c, d, groups[8], S11, 0x698098d8L); /* 9 */ d = FF(d, a, b, c, groups[9], S12, 0x8b44f7afL); /* 10 */ c = FF(c, d, a, b, groups[10], S13, 0xffff5bb1L); /* 11 */ b = FF(b, c, d, a, groups[11], S14, 0x895cd7beL); /* 12 */ a = FF(a, b, c, d, groups[12], S11, 0x6b901122L); /* 13 */ d = FF(d, a, b, c, groups[13], S12, 0xfd987193L); /* 14 */ c = FF(c, d, a, b, groups[14], S13, 0xa679438eL); /* 15 */ b = FF(b, c, d, a, groups[15], S14, 0x49b40821L); /* 16 */ /*第二轮*/ a = GG(a, b, c, d, groups[1], S21, 0xf61e2562L); /* 17 */ d = GG(d, a, b, c, groups[6], S22, 0xc040b340L); /* 18 */ c = GG(c, d, a, b, groups[11], S23, 0x265e5a51L); /* 19 */ b = GG(b, c, d, a, groups[0], S24, 0xe9b6c7aaL); /* 20 */ a = GG(a, b, c, d, groups[5], S21, 0xd62f105dL); /* 21 */ d = GG(d, a, b, c, groups[10], S22, 0x2441453L); /* 22 */ c = GG(c, d, a, b, groups[15], S23, 0xd8a1e681L); /* 23 */ b = GG(b, c, d, a, groups[4], S24, 0xe7d3fbc8L); /* 24 */ a = GG(a, b, c, d, groups[9], S21, 0x21e1cde6L); /* 25 */ d = GG(d, a, b, c, groups[14], S22, 0xc33707d6L); /* 26 */ c = GG(c, d, a, b, groups[3], S23, 0xf4d50d87L); /* 27 */ b = GG(b, c, d, a, groups[8], S24, 0x455a14edL); /* 28 */ a = GG(a, b, c, d, groups[13], S21, 0xa9e3e905L); /* 29 */ d = GG(d, a, b, c, groups[2], S22, 0xfcefa3f8L); /* 30 */ c = GG(c, d, a, b, groups[7], S23, 0x676f02d9L); /* 31 */ b = GG(b, c, d, a, groups[12], S24, 0x8d2a4c8aL); /* 32 */ /*第三轮*/ a = HH(a, b, c, d, groups[5], S31, 0xfffa3942L); /* 33 */ d = HH(d, a, b, c, groups[8], S32, 0x8771f681L); /* 34 */ c = HH(c, d, a, b, groups[11], S33, 0x6d9d6122L); /* 35 */ b = HH(b, c, d, a, groups[14], S34, 0xfde5380cL); /* 36 */ a = HH(a, b, c, d, groups[1], S31, 0xa4beea44L); /* 37 */ d = HH(d, a, b, c, groups[4], S32, 0x4bdecfa9L); /* 38 */ c = HH(c, d, a, b, groups[7], S33, 0xf6bb4b60L); /* 39 */ b = HH(b, c, d, a, groups[10], S34, 0xbebfbc70L); /* 40 */ a = HH(a, b, c, d, groups[13], S31, 0x289b7ec6L); /* 41 */ d = HH(d, a, b, c, groups[0], S32, 0xeaa127faL); /* 42 */ c = HH(c, d, a, b, groups[3], S33, 0xd4ef3085L); /* 43 */ b = HH(b, c, d, a, groups[6], S34, 0x4881d05L); /* 44 */ a = HH(a, b, c, d, groups[9], S31, 0xd9d4d039L); /* 45 */ d = HH(d, a, b, c, groups[12], S32, 0xe6db99e5L); /* 46 */ c = HH(c, d, a, b, groups[15], S33, 0x1fa27cf8L); /* 47 */ b = HH(b, c, d, a, groups[2], S34, 0xc4ac5665L); /* 48 */ /*第四轮*/ a = II(a, b, c, d, groups[0], S41, 0xf4292244L); /* 49 */ d = II(d, a, b, c, groups[7], S42, 0x432aff97L); /* 50 */ c = II(c, d, a, b, groups[14], S43, 0xab9423a7L); /* 51 */ b = II(b, c, d, a, groups[5], S44, 0xfc93a039L); /* 52 */ a = II(a, b, c, d, groups[12], S41, 0x655b59c3L); /* 53 */ d = II(d, a, b, c, groups[3], S42, 0x8f0ccc92L); /* 54 */ c = II(c, d, a, b, groups[10], S43, 0xffeff47dL); /* 55 */ b = II(b, c, d, a, groups[1], S44, 0x85845dd1L); /* 56 */ a = II(a, b, c, d, groups[8], S41, 0x6fa87e4fL); /* 57 */ d = II(d, a, b, c, groups[15], S42, 0xfe2ce6e0L); /* 58 */ c = II(c, d, a, b, groups[6], S43, 0xa3014314L); /* 59 */ b = II(b, c, d, a, groups[13], S44, 0x4e0811a1L); /* 60 */ a = II(a, b, c, d, groups[4], S41, 0xf7537e82L); /* 61 */ d = II(d, a, b, c, groups[11], S42, 0xbd3af235L); /* 62 */ c = II(c, d, a, b, groups[2], S43, 0x2ad7d2bbL); /* 63 */ b = II(b, c, d, a, groups[9], S44, 0xeb86d391L); /* 64 */ /*增加到之前计算的结果其中*/ result[0] += a; result[1] += b; result[2] += c; result[3] += d; result[0]=result[0]&0xFFFFFFFFL; result[1]=result[1]&0xFFFFFFFFL; result[2]=result[2]&0xFFFFFFFFL; result[3]=result[3]&0xFFFFFFFFL; } /** * 以下是处理要用到的线性函数 */ private static long F(long x, long y, long z) { return (x & y) | ((~x) & z); } private static long G(long x, long y, long z) { return (x & z) | (y & (~z)); } private static long H(long x, long y, long z) { return x ^ y ^ z; } private static long I(long x, long y, long z) { return y ^ (x | (~z)); } private static long FF(long a, long b, long c, long d, long x, long s, long ac) { a += (F(b, c, d)&0xFFFFFFFFL) + x + ac; a = ((a&0xFFFFFFFFL)<< s) | ((a&0xFFFFFFFFL) >>> (32 - s)); a += b; return (a&0xFFFFFFFFL); } private static long GG(long a, long b, long c, long d, long x, long s, long ac) { a += (G(b, c, d)&0xFFFFFFFFL) + x + ac; a = ((a&0xFFFFFFFFL) << s) | ((a&0xFFFFFFFFL) >>> (32 - s)); a += b; return (a&0xFFFFFFFFL); } private static long HH(long a, long b, long c, long d, long x, long s, long ac) { a += (H(b, c, d)&0xFFFFFFFFL) + x + ac; a = ((a&0xFFFFFFFFL) << s) | ((a&0xFFFFFFFFL) >>> (32 - s)); a += b; return (a&0xFFFFFFFFL); } private static long II(long a, long b, long c, long d, long x, long s, long ac) { a += (I(b, c, d)&0xFFFFFFFFL) + x + ac; a = ((a&0xFFFFFFFFL) << s) | ((a&0xFFFFFFFFL) >>> (32 - s)); a += b; return (a&0xFFFFFFFFL); }}package woxingwosu;/************************************************ * MD5 算法 * @author 我行我素 * @Date 2007-07-06*************************************************/import java.security.MessageDigest;public class MyMD5 { static char[] hex = {‘0‘,‘1‘,‘2‘,‘3‘,‘4‘,‘5‘,‘6‘,‘7‘,‘8‘,‘9‘,‘A‘,‘B‘,‘C‘,‘D‘,‘E‘,‘F‘}; public static void main(String[] args) { try{ MessageDigest md5 = MessageDigest.getInstance("MD5");//申明使用MD5算法 md5.update("a".getBytes());// System.out.println("md5(a)="+byte2str(md5.digest())); md5.update("a".getBytes()); md5.update("bc".getBytes()); System.out.println("md5(abc)="+byte2str(md5.digest())); }catch(Exception e){ e.printStackTrace(); } } /** * 将字节数组转换成十六进制字符串 * @param bytes * @return */ private static String byte2str(byte []bytes){ int len = bytes.length; StringBuffer result = new StringBuffer(); for (int i = 0; i < len; i++) { byte byte0 = bytes[i]; result.append(hex[byte0 >>> 4 & 0xf]); result.append(hex[byte0 & 0xf]); } return result.toString(); }} /* * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message * Digest Algorithm, as defined in RFC 1321. * Version 2.1 Copyright (C) Paul Johnston 1999 - 2002. * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet * Distributed under the BSD License * See http://pajhome.org.uk/crypt/md5 for more info. *//* * Configurable variables. You may need to tweak these to be compatible with * the server-side, but the defaults work in most cases. */var hexcase = 1; /* hex output format. 0 - lowercase; 1 - uppercase */var b64pad = ""; /* base-64 pad character. "=" for strict RFC compliance */var chrsz = 8; /* bits per input character. 8 - ASCII; 16 - Unicode *//* * These are the functions you‘ll usually want to call * They take string arguments and return either hex or base-64 encoded strings */function hex_md5(s){ return binl2hex(core_md5(str2binl(s), s.length * chrsz));}function str_md5(s){ return binl2str(core_md5(str2binl(s), s.length * chrsz));}function hex_hmac_md5(key, data) { return binl2hex(core_hmac_md5(key, data)); }function str_hmac_md5(key, data) { return binl2str(core_hmac_md5(key, data)); }/* * Calculate the MD5 of an array of little-endian words, and a bit length */function core_md5(x, len){ /* append padding */ x[len >> 5] |= 0x80 << ((len) % 32); x[(((len + 64) >>> 9) << 4) + 14] = len; var a = 1732584193; var b = -271733879; var c = -1732584194; var d = 271733878; for(var i = 0; i < x.length; i += 16) { var olda = a; var oldb = b; var oldc = c; var oldd = d; a = md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936); d = md5_ff(d, a, b, c, x[i+ 1], 12, -389564586); c = md5_ff(c, d, a, b, x[i+ 2], 17, 606105819); b = md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330); a = md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897); d = md5_ff(d, a, b, c, x[i+ 5], 12, 1200080426); c = md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341); b = md5_ff(b, c, d, a, x[i+ 7], 22, -45705983); a = md5_ff(a, b, c, d, x[i+ 8], 7 , 1770035416); d = md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417); c = md5_ff(c, d, a, b, x[i+10], 17, -42063); b = md5_ff(b, c, d, a, x[i+11], 22, -1990404162); a = md5_ff(a, b, c, d, x[i+12], 7 , 1804603682); d = md5_ff(d, a, b, c, x[i+13], 12, -40341101); c = md5_ff(c, d, a, b, x[i+14], 17, -1502002290); b = md5_ff(b, c, d, a, x[i+15], 22, 1236535329); a = md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510); d = md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632); c = md5_gg(c, d, a, b, x[i+11], 14, 643717713); b = md5_gg(b, c, d, a, x[i+ 0], 20, -373897302); a = md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691); d = md5_gg(d, a, b, c, x[i+10], 9 , 38016083); c = md5_gg(c, d, a, b, x[i+15], 14, -660478335); b = md5_gg(b, c, d, a, x[i+ 4], 20, -405537848); a = md5_gg(a, b, c, d, x[i+ 9], 5 , 568446438); d = md5_gg(d, a, b, c, x[i+14], 9 , -1019803690); c = md5_gg(c, d, a, b, x[i+ 3], 14, -187363961); b = md5_gg(b, c, d, a, x[i+ 8], 20, 1163531501); a = md5_gg(a, b, c, d, x[i+13], 5 , -1444681467); d = md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784); c = md5_gg(c, d, a, b, x[i+ 7], 14, 1735328473); b = md5_gg(b, c, d, a, x[i+12], 20, -1926607734); a = md5_hh(a, b, c, d, x[i+ 5], 4 , -378558); d = md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463); c = md5_hh(c, d, a, b, x[i+11], 16, 1839030562); b = md5_hh(b, c, d, a, x[i+14], 23, -35309556); a = md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060); d = md5_hh(d, a, b, c, x[i+ 4], 11, 1272893353); c = md5_hh(c, d, a, b, x[i+ 7], 16, -155497632); b = md5_hh(b, c, d, a, x[i+10], 23, -1094730640); a = md5_hh(a, b, c, d, x[i+13], 4 , 681279174); d = md5_hh(d, a, b, c, x[i+ 0], 11, -358537222); c = md5_hh(c, d, a, b, x[i+ 3], 16, -722521979); b = md5_hh(b, c, d, a, x[i+ 6], 23, 76029189); a = md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487); d = md5_hh(d, a, b, c, x[i+12], 11, -421815835); c = md5_hh(c, d, a, b, x[i+15], 16, 530742520); b = md5_hh(b, c, d, a, x[i+ 2], 23, -995338651); a = md5_ii(a, b, c, d, x[i+ 0], 6 , -198630844); d = md5_ii(d, a, b, c, x[i+ 7], 10, 1126891415); c = md5_ii(c, d, a, b, x[i+14], 15, -1416354905); b = md5_ii(b, c, d, a, x[i+ 5], 21, -57434055); a = md5_ii(a, b, c, d, x[i+12], 6 , 1700485571); d = md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606); c = md5_ii(c, d, a, b, x[i+10], 15, -1051523); b = md5_ii(b, c, d, a, x[i+ 1], 21, -2054922799); a = md5_ii(a, b, c, d, x[i+ 8], 6 , 1873313359); d = md5_ii(d, a, b, c, x[i+15], 10, -30611744); c = md5_ii(c, d, a, b, x[i+ 6], 15, -1560198380); b = md5_ii(b, c, d, a, x[i+13], 21, 1309151649); a = md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070); d = md5_ii(d, a, b, c, x[i+11], 10, -1120210379); c = md5_ii(c, d, a, b, x[i+ 2], 15, 718787259); b = md5_ii(b, c, d, a, x[i+ 9], 21, -343485551); a = safe_add(a, olda); b = safe_add(b, oldb); c = safe_add(c, oldc); d = safe_add(d, oldd); } return Array(a, b, c, d);}/* * These functions implement the four basic operations the algorithm uses. */function md5_cmn(q, a, b, x, s, t){ return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s),b);}function md5_ff(a, b, c, d, x, s, t){ return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);}function md5_gg(a, b, c, d, x, s, t){ return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);}function md5_hh(a, b, c, d, x, s, t){ return md5_cmn(b ^ c ^ d, a, b, x, s, t);}function md5_ii(a, b, c, d, x, s, t){ return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);}/* * Calculate the HMAC-MD5, of a key and some data */function core_hmac_md5(key, data){ var bkey = str2binl(key); if(bkey.length > 16) bkey = core_md5(bkey, key.length * chrsz); var ipad = Array(16), opad = Array(16); for(var i = 0; i < 16; i++) { ipad[i] = bkey[i] ^ 0x36363636; opad[i] = bkey[i] ^ 0x5C5C5C5C; } var hash = core_md5(ipad.concat(str2binl(data)), 512 + data.length * chrsz); return core_md5(opad.concat(hash), 512 + 128);}/* * Add integers, wrapping at 2^32. This uses 16-bit operations internally * to work around bugs in some JS interpreters. */function safe_add(x, y){ var lsw = (x & 0xFFFF) + (y & 0xFFFF); var msw = (x >> 16) + (y >> 16) + (lsw >> 16); return (msw << 16) | (lsw & 0xFFFF);}/* * Bitwise rotate a 32-bit number to the left. */function bit_rol(num, cnt){ return (num << cnt) | (num >>> (32 - cnt));}/* * Convert a string to an array of little-endian words * If chrsz is ASCII, characters >255 have their hi-byte silently ignored. */function str2binl(str){ var bin = Array(); var mask = (1 << chrsz) - 1; for(var i = 0; i < str.length * chrsz; i += chrsz) bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (i%32); return bin;}/* * Convert an array of little-endian words to a string */function binl2str(bin){ var str = ""; var mask = (1 << chrsz) - 1; for(var i = 0; i < bin.length * 32; i += chrsz) str += String.fromCharCode((bin[i>>5] >>> (i % 32)) & mask); return str;}/* * Convert an array of little-endian words to a hex string. */function binl2hex(binarray){ var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef"; var str = ""; for(var i = 0; i < binarray.length * 4; i++) { str += hex_tab.charAt((binarray[i>>2] >> ((i%4)*8+4)) & 0xF) + hex_tab.charAt((binarray[i>>2] >> ((i%4)*8 )) & 0xF); } return str;}String.prototype.trim = function(){return this.replace(/(^s*)|(s*$)/g, "");}function md5(text) { return hex_md5(text.trim());}标签：
原文地址：http://www.cnblogs.com/gcczhongduan/p/4309605.html
