JS的MD5加密

 ?1 /* ?2 ?* A JavaScript implementation of the RSA Data Security, Inc. MD5 Message ?3 ?* Digest Algorithm, as defined in RFC 1321. ?4 ?* Version 2.1 Copyright (C) Paul Johnston 1999 - 2002. ?5 ?* Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet ?6 ?* Distributed under the BSD License ?7 ?* See http://pajhome.org.uk/crypt/md5 for more info. ?8 ?*/ ?9 ?10 /* 11 ?* Configurable variables. You may need to tweak these to be compatible with 12 ?* the server-side, but the defaults work in most cases. 13 ?*/ 14 var hexcase = 0; ?/* hex output format. 0 - lowercase; 1 - uppercase ???????*/ 15 var b64pad ?= ""; /* base-64 pad character. "=" for strict RFC compliance ??*/ 16 var chrsz ??= 8; ?/* bits per input character. 8 - ASCII; 16 - Unicode ?????*/ 17 ?18 /* 19 ?* These are the functions you‘ll usually want to call 20 ?* They take string arguments and return either hex or base-64 encoded strings 21 ?*/ 22 function hex_md5(s){ return binl2hex(core_md5(str2binl(s), s.length * chrsz));} 23 function b64_md5(s){ return binl2b64(core_md5(str2binl(s), s.length * chrsz));} 24 function str_md5(s){ return binl2str(core_md5(str2binl(s), s.length * chrsz));} 25 function hex_hmac_md5(key, data) { return binl2hex(core_hmac_md5(key, data)); } 26 function b64_hmac_md5(key, data) { return binl2b64(core_hmac_md5(key, data)); } 27 function str_hmac_md5(key, data) { return binl2str(core_hmac_md5(key, data)); } 28 ?29 /* 30 ?* Perform a simple self-test to see if the VM is working 31 ?*/ 32 function md5_vm_test() 33 { 34 ??return hex_md5("abc") == "900150983cd24fb0d6963f7d28e17f72"; 35 } 36 ?37 /* 38 ?* Calculate the MD5 of an array of little-endian words, and a bit length 39 ?*/ 40 function core_md5(x, len) 41 { 42 ??/* append padding */ 43 ??x[len >> 5] |= 0x80 << ((len) % 32); 44 ??x[(((len + 64) >>> 9) << 4) + 14] = len; 45 ?46 ??var a = ?1732584193; 47 ??var b = -271733879; 48 ??var c = -1732584194; 49 ??var d = ?271733878; 50 ?51 ??for(var i = 0; i < x.length; i += 16) 52 ??{ 53 ????var olda = a; 54 ????var oldb = b; 55 ????var oldc = c; 56 ????var oldd = d; 57 ?58 ????a = md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936); 59 ????d = md5_ff(d, a, b, c, x[i+ 1], 12, -389564586); 60 ????c = md5_ff(c, d, a, b, x[i+ 2], 17, ?606105819); 61 ????b = md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330); 62 ????a = md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897); 63 ????d = md5_ff(d, a, b, c, x[i+ 5], 12, ?1200080426); 64 ????c = md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341); 65 ????b = md5_ff(b, c, d, a, x[i+ 7], 22, -45705983); 66 ????a = md5_ff(a, b, c, d, x[i+ 8], 7 , ?1770035416); 67 ????d = md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417); 68 ????c = md5_ff(c, d, a, b, x[i+10], 17, -42063); 69 ????b = md5_ff(b, c, d, a, x[i+11], 22, -1990404162); 70 ????a = md5_ff(a, b, c, d, x[i+12], 7 , ?1804603682); 71 ????d = md5_ff(d, a, b, c, x[i+13], 12, -40341101); 72 ????c = md5_ff(c, d, a, b, x[i+14], 17, -1502002290); 73 ????b = md5_ff(b, c, d, a, x[i+15], 22, ?1236535329); 74 ?75 ????a = md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510); 76 ????d = md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632); 77 ????c = md5_gg(c, d, a, b, x[i+11], 14, ?643717713); 78 ????b = md5_gg(b, c, d, a, x[i+ 0], 20, -373897302); 79 ????a = md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691); 80 ????d = md5_gg(d, a, b, c, x[i+10], 9 , ?38016083); 81 ????c = md5_gg(c, d, a, b, x[i+15], 14, -660478335); 82 ????b = md5_gg(b, c, d, a, x[i+ 4], 20, -405537848); 83 ????a = md5_gg(a, b, c, d, x[i+ 9], 5 , ?568446438); 84 ????d = md5_gg(d, a, b, c, x[i+14], 9 , -1019803690); 85 ????c = md5_gg(c, d, a, b, x[i+ 3], 14, -187363961); 86 ????b = md5_gg(b, c, d, a, x[i+ 8], 20, ?1163531501); 87 ????a = md5_gg(a, b, c, d, x[i+13], 5 , -1444681467); 88 ????d = md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784); 89 ????c = md5_gg(c, d, a, b, x[i+ 7], 14, ?1735328473); 90 ????b = md5_gg(b, c, d, a, x[i+12], 20, -1926607734); 91 ?92 ????a = md5_hh(a, b, c, d, x[i+ 5], 4 , -378558); 93 ????d = md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463); 94 ????c = md5_hh(c, d, a, b, x[i+11], 16, ?1839030562); 95 ????b = md5_hh(b, c, d, a, x[i+14], 23, -35309556); 96 ????a = md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060); 97 ????d = md5_hh(d, a, b, c, x[i+ 4], 11, ?1272893353); 98 ????c = md5_hh(c, d, a, b, x[i+ 7], 16, -155497632); 99 ????b = md5_hh(b, c, d, a, x[i+10], 23, -1094730640);100 ????a = md5_hh(a, b, c, d, x[i+13], 4 , ?681279174);101 ????d = md5_hh(d, a, b, c, x[i+ 0], 11, -358537222);102 ????c = md5_hh(c, d, a, b, x[i+ 3], 16, -722521979);103 ????b = md5_hh(b, c, d, a, x[i+ 6], 23, ?76029189);104 ????a = md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487);105 ????d = md5_hh(d, a, b, c, x[i+12], 11, -421815835);106 ????c = md5_hh(c, d, a, b, x[i+15], 16, ?530742520);107 ????b = md5_hh(b, c, d, a, x[i+ 2], 23, -995338651);108 109 ????a = md5_ii(a, b, c, d, x[i+ 0], 6 , -198630844);110 ????d = md5_ii(d, a, b, c, x[i+ 7], 10, ?1126891415);111 ????c = md5_ii(c, d, a, b, x[i+14], 15, -1416354905);112 ????b = md5_ii(b, c, d, a, x[i+ 5], 21, -57434055);113 ????a = md5_ii(a, b, c, d, x[i+12], 6 , ?1700485571);114 ????d = md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606);115 ????c = md5_ii(c, d, a, b, x[i+10], 15, -1051523);116 ????b = md5_ii(b, c, d, a, x[i+ 1], 21, -2054922799);117 ????a = md5_ii(a, b, c, d, x[i+ 8], 6 , ?1873313359);118 ????d = md5_ii(d, a, b, c, x[i+15], 10, -30611744);119 ????c = md5_ii(c, d, a, b, x[i+ 6], 15, -1560198380);120 ????b = md5_ii(b, c, d, a, x[i+13], 21, ?1309151649);121 ????a = md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070);122 ????d = md5_ii(d, a, b, c, x[i+11], 10, -1120210379);123 ????c = md5_ii(c, d, a, b, x[i+ 2], 15, ?718787259);124 ????b = md5_ii(b, c, d, a, x[i+ 9], 21, -343485551);125 126 ????a = safe_add(a, olda);127 ????b = safe_add(b, oldb);128 ????c = safe_add(c, oldc);129 ????d = safe_add(d, oldd);130 ??}131 ??return Array(a, b, c, d);132 133 }134 135 /*136 ?* These functions implement the four basic operations the algorithm uses.137 ?*/138 function md5_cmn(q, a, b, x, s, t)139 {140 ??return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s),b);141 }142 function md5_ff(a, b, c, d, x, s, t)143 {144 ??return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);145 }146 function md5_gg(a, b, c, d, x, s, t)147 {148 ??return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);149 }150 function md5_hh(a, b, c, d, x, s, t)151 {152 ??return md5_cmn(b ^ c ^ d, a, b, x, s, t);153 }154 function md5_ii(a, b, c, d, x, s, t)155 {156 ??return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);157 }158 159 /*160 ?* Calculate the HMAC-MD5, of a key and some data161 ?*/162 function core_hmac_md5(key, data)163 {164 ??var bkey = str2binl(key);165 ??if(bkey.length > 16) bkey = core_md5(bkey, key.length * chrsz);166 167 ??var ipad = Array(16), opad = Array(16);168 ??for(var i = 0; i < 16; i++)169 ??{170 ????ipad[i] = bkey[i] ^ 0x36363636;171 ????opad[i] = bkey[i] ^ 0x5C5C5C5C;172 ??}173 174 ??var hash = core_md5(ipad.concat(str2binl(data)), 512 + data.length * chrsz);175 ??return core_md5(opad.concat(hash), 512 + 128);176 }177 178 /*179 ?* Add integers, wrapping at 2^32. This uses 16-bit operations internally180 ?* to work around bugs in some JS interpreters.181 ?*/182 function safe_add(x, y)183 {184 ??var lsw = (x & 0xFFFF) + (y & 0xFFFF);185 ??var msw = (x >> 16) + (y >> 16) + (lsw >> 16);186 ??return (msw << 16) | (lsw & 0xFFFF);187 }188 189 /*190 ?* Bitwise rotate a 32-bit number to the left.191 ?*/192 function bit_rol(num, cnt)193 {194 ??return (num << cnt) | (num >>> (32 - cnt));195 }196 197 /*198 ?* Convert a string to an array of little-endian words199 ?* If chrsz is ASCII, characters >255 have their hi-byte silently ignored.200 ?*/201 function str2binl(str)202 {203 ??var bin = Array();204 ??var mask = (1 << chrsz) - 1;205 ??for(var i = 0; i < str.length * chrsz; i += chrsz)206 ????bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (i%32);207 ??return bin;208 }209 210 /*211 ?* Convert an array of little-endian words to a string212 ?*/213 function binl2str(bin)214 {215 ??var str = "";216 ??var mask = (1 << chrsz) - 1;217 ??for(var i = 0; i < bin.length * 32; i += chrsz)218 ????str += String.fromCharCode((bin[i>>5] >>> (i % 32)) & mask);219 ??return str;220 }221 222 /*223 ?* Convert an array of little-endian words to a hex string.224 ?*/225 function binl2hex(binarray)226 {227 ??var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";228 ??var str = "";229 ??for(var i = 0; i < binarray.length * 4; i++)230 ??{231 ????str += hex_tab.charAt((binarray[i>>2] >> ((i%4)*8+4)) & 0xF) +232 ???????????hex_tab.charAt((binarray[i>>2] >> ((i%4)*8 ?)) & 0xF);233 ??}234 ??return str;235 }236 237 /*238 ?* Convert an array of little-endian words to a base-64 string239 ?*/240 function binl2b64(binarray)241 {242 ??var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";243 ??var str = "";244 ??for(var i = 0; i < binarray.length * 4; i += 3)245 ??{246 ????var triplet = (((binarray[i ??>> 2] >> 8 * ( i ??%4)) & 0xFF) << 16)247 ????????????????| (((binarray[i+1 >> 2] >> 8 * ((i+1)%4)) & 0xFF) << 8 )248 ????????????????| ?((binarray[i+2 >> 2] >> 8 * ((i+2)%4)) & 0xFF);249 ????for(var j = 0; j < 4; j++)250 ????{251 ??????if(i * 8 + j * 6 > binarray.length * 32) str += b64pad;252 ??????else str += tab.charAt((triplet >> 6*(3-j)) & 0x3F);253 ????}254 ??}255 ??return str;256 }