JS常用加密编码与算法实例总结
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2022-05-28 21:22:09
本文实例讲述了js常用加密编码与算法。分享给大家供大家参考,具体如下:
一:utf8编码函数
function urlencode(str){
if(str...
本文实例讲述了js常用加密编码与算法。分享给大家供大家参考,具体如下:
一:utf8编码函数
function urlencode(str){ if(str==null||str=="") return ""; var newstr=""; function tocase(sstr){ return sstr.tostring(16).touppercase(); } for(var i=0,icode,len=str.length;i<len;i++){ icode=str.charcodeat(i); if( icode<0x10) newstr+="%0"+icode.tostring(16).touppercase(); else if(icode<0x80){ if(icode==0x20) newstr+="+"; else if((icode>=0x30&&icode<=0x39)||(icode>=0x41&&icode<=0x5a)||(icode>=0x61&&icode<=0x7a)) newstr+=str.charat(i); else newstr+="%"+tocase(icode); } else if(icode<0x800){ newstr+="%"+tocase(0xc0+(icode>>6)); newstr+="%"+tocase(0x80+icode%0x40); } else{ newstr+="%"+tocase(0xe0+(icode>>12)); newstr+="%"+tocase(0x80+(icode>>6)%0x40); newstr+="%"+tocase(0x80+icode%0x40); } } return newstr; }
二:base64编码,解码函数
var base64encodechars = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789+/"; var base64decodechars = new array( -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1); function base64encode(str) { var out, i, len; var c1, c2, c3; len = str.length; i = 0; out = ""; while(i < len) { c1 = str.charcodeat(i++) & 0xff; if(i == len) { out += base64encodechars.charat(c1 >> 2); out += base64encodechars.charat((c1 & 0x3) << 4); out += "=="; break; } c2 = str.charcodeat(i++); if(i == len) { out += base64encodechars.charat(c1 >> 2); out += base64encodechars.charat(((c1 & 0x3)<< 4) | ((c2 & 0xf0) >> 4)); out += base64encodechars.charat((c2 & 0xf) << 2); out += "="; break; } c3 = str.charcodeat(i++); out += base64encodechars.charat(c1 >> 2); out += base64encodechars.charat(((c1 & 0x3)<< 4) | ((c2 & 0xf0) >> 4)); out += base64encodechars.charat(((c2 & 0xf) << 2) | ((c3 & 0xc0) >>6)); out += base64encodechars.charat(c3 & 0x3f); } return out; } function base64decode(str) { var c1, c2, c3, c4; var i, len, out; len = str.length; i = 0; out = ""; while(i < len) { /* c1 */ do { c1 = base64decodechars[str.charcodeat(i++) & 0xff]; } while(i < len && c1 == -1); if(c1 == -1) break; /* c2 */ do { c2 = base64decodechars[str.charcodeat(i++) & 0xff]; } while(i < len && c2 == -1); if(c2 == -1) break; out += string.fromcharcode((c1 << 2) | ((c2 & 0x30) >> 4)); /* c3 */ do { c3 = str.charcodeat(i++) & 0xff; if(c3 == 61) return out; c3 = base64decodechars[c3]; } while(i < len && c3 == -1); if(c3 == -1) break; out += string.fromcharcode(((c2 & 0xf) << 4) | ((c3 & 0x3c) >> 2)); /* c4 */ do { c4 = str.charcodeat(i++) & 0xff; if(c4 == 61) return out; c4 = base64decodechars[c4]; } while(i < len && c4 == -1); if(c4 == -1) break; out += string.fromcharcode(((c3 & 0x03) << 6) | c4); } return out; } function utf16to8(str) { var out, i, len, c; out = ""; len = str.length; for(i = 0; i < len; i++) { c = str.charcodeat(i); if ((c >= 0x0001) && (c <= 0x007f)) { out += str.charat(i); } else if (c > 0x07ff) { out += string.fromcharcode(0xe0 | ((c >> 12) & 0x0f)); out += string.fromcharcode(0x80 | ((c >> 6) & 0x3f)); out += string.fromcharcode(0x80 | ((c >> 0) & 0x3f)); } else { out += string.fromcharcode(0xc0 | ((c >> 6) & 0x1f)); out += string.fromcharcode(0x80 | ((c >> 0) & 0x3f)); } } return out; } function utf8to16(str) { var out, i, len, c; var char2, char3; out = ""; len = str.length; i = 0; while(i < len) { c = str.charcodeat(i++); switch(c >> 4) { case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7: // 0xxxxxxx out += str.charat(i-1); break; case 12: case 13: // 110x xxxx 10xx xxxx char2 = str.charcodeat(i++); out += string.fromcharcode(((c & 0x1f) << 6) | (char2 & 0x3f)); break; case 14: // 1110 xxxx 10xx xxxx 10xx xxxx char2 = str.charcodeat(i++); char3 = str.charcodeat(i++); out += string.fromcharcode(((c & 0x0f) << 12) | ((char2 & 0x3f) << 6) | ((char3 & 0x3f) << 0)); break; } } return out; } function doit() { var f = document.f f.output.value = base64encode(utf16to8(f.source.value)) f.decode.value = utf8to16(base64decode(f.output.value)) }
三:md5
/* * 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 = 0; /* 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 b64_md5(s){ return binl2b64(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 b64_hmac_md5(key, data) { return binl2b64(core_hmac_md5(key, data)); } function str_hmac_md5(key, data) { return binl2str(core_hmac_md5(key, data)); } /* * perform a simple self-test to see if the vm is working */ function md5_vm_test() { return hex_md5("abc") == "900150983cd24fb0d6963f7d28e17f72"; } /* * 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; } /* * convert an array of little-endian words to a base-64 string */ function binl2b64(binarray) { var tab = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789+/"; var str = ""; for(var i = 0; i < binarray.length * 4; i += 3) { var triplet = (((binarray[i >> 2] >> 8 * ( i %4)) & 0xff) << 16) | (((binarray[i+1 >> 2] >> 8 * ((i+1)%4)) & 0xff) << 8 ) | ((binarray[i+2 >> 2] >> 8 * ((i+2)%4)) & 0xff); for(var j = 0; j < 4; j++) { if(i * 8 + j * 6 > binarray.length * 32) str += b64pad; else str += tab.charat((triplet >> 6*(3-j)) & 0x3f); } } return str; }
md4算法
/* * a javascript implementation of the rsa data security, inc. md4 message * digest algorithm, as defined in rfc 1320. * version 2.1 copyright (c) jerrad pierce, 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 = 0; /* 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 */ function hex_md4(s){ return binl2hex(core_md4(str2binl(s), s.length * chrsz));} function b64_md4(s){ return binl2b64(core_md4(str2binl(s), s.length * chrsz));} function str_md4(s){ return binl2str(core_md4(str2binl(s), s.length * chrsz));} function hex_hmac_md4(key, data) { return binl2hex(core_hmac_md4(key, data)); } function b64_hmac_md4(key, data) { return binl2b64(core_hmac_md4(key, data)); } function str_hmac_md4(key, data) { return binl2str(core_hmac_md4(key, data)); } /* * perform a simple self-test to see if the vm is working */ function md4_vm_test() { return hex_md4("abc") == "a448017aaf21d8525fc10ae87aa6729d"; } /* * calculate the md4 of an array of little-endian words, and a bit length */ function core_md4(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 = md4_ff(a, b, c, d, x[i+ 0], 3 ); d = md4_ff(d, a, b, c, x[i+ 1], 7 ); c = md4_ff(c, d, a, b, x[i+ 2], 11); b = md4_ff(b, c, d, a, x[i+ 3], 19); a = md4_ff(a, b, c, d, x[i+ 4], 3 ); d = md4_ff(d, a, b, c, x[i+ 5], 7 ); c = md4_ff(c, d, a, b, x[i+ 6], 11); b = md4_ff(b, c, d, a, x[i+ 7], 19); a = md4_ff(a, b, c, d, x[i+ 8], 3 ); d = md4_ff(d, a, b, c, x[i+ 9], 7 ); c = md4_ff(c, d, a, b, x[i+10], 11); b = md4_ff(b, c, d, a, x[i+11], 19); a = md4_ff(a, b, c, d, x[i+12], 3 ); d = md4_ff(d, a, b, c, x[i+13], 7 ); c = md4_ff(c, d, a, b, x[i+14], 11); b = md4_ff(b, c, d, a, x[i+15], 19); a = md4_gg(a, b, c, d, x[i+ 0], 3 ); d = md4_gg(d, a, b, c, x[i+ 4], 5 ); c = md4_gg(c, d, a, b, x[i+ 8], 9 ); b = md4_gg(b, c, d, a, x[i+12], 13); a = md4_gg(a, b, c, d, x[i+ 1], 3 ); d = md4_gg(d, a, b, c, x[i+ 5], 5 ); c = md4_gg(c, d, a, b, x[i+ 9], 9 ); b = md4_gg(b, c, d, a, x[i+13], 13); a = md4_gg(a, b, c, d, x[i+ 2], 3 ); d = md4_gg(d, a, b, c, x[i+ 6], 5 ); c = md4_gg(c, d, a, b, x[i+10], 9 ); b = md4_gg(b, c, d, a, x[i+14], 13); a = md4_gg(a, b, c, d, x[i+ 3], 3 ); d = md4_gg(d, a, b, c, x[i+ 7], 5 ); c = md4_gg(c, d, a, b, x[i+11], 9 ); b = md4_gg(b, c, d, a, x[i+15], 13); a = md4_hh(a, b, c, d, x[i+ 0], 3 ); d = md4_hh(d, a, b, c, x[i+ 8], 9 ); c = md4_hh(c, d, a, b, x[i+ 4], 11); b = md4_hh(b, c, d, a, x[i+12], 15); a = md4_hh(a, b, c, d, x[i+ 2], 3 ); d = md4_hh(d, a, b, c, x[i+10], 9 ); c = md4_hh(c, d, a, b, x[i+ 6], 11); b = md4_hh(b, c, d, a, x[i+14], 15); a = md4_hh(a, b, c, d, x[i+ 1], 3 ); d = md4_hh(d, a, b, c, x[i+ 9], 9 ); c = md4_hh(c, d, a, b, x[i+ 5], 11); b = md4_hh(b, c, d, a, x[i+13], 15); a = md4_hh(a, b, c, d, x[i+ 3], 3 ); d = md4_hh(d, a, b, c, x[i+11], 9 ); c = md4_hh(c, d, a, b, x[i+ 7], 11); b = md4_hh(b, c, d, a, x[i+15], 15); 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 basic operation for each round of the * algorithm. */ function md4_cmn(q, a, b, x, s, t) { return safe_add(rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b); } function md4_ff(a, b, c, d, x, s) { return md4_cmn((b & c) | ((~b) & d), a, 0, x, s, 0); } function md4_gg(a, b, c, d, x, s) { return md4_cmn((b & c) | (b & d) | (c & d), a, 0, x, s, 1518500249); } function md4_hh(a, b, c, d, x, s) { return md4_cmn(b ^ c ^ d, a, 0, x, s, 1859775393); } /* * calculate the hmac-md4, of a key and some data */ function core_hmac_md4(key, data) { var bkey = str2binl(key); if(bkey.length > 16) bkey = core_md4(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_md4(ipad.concat(str2binl(data)), 512 + data.length * chrsz); return core_md4(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 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; } /* * convert an array of little-endian words to a base-64 string */ function binl2b64(binarray) { var tab = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789+/"; var str = ""; for(var i = 0; i < binarray.length * 4; i += 3) { var triplet = (((binarray[i >> 2] >> 8 * ( i %4)) & 0xff) << 16) | (((binarray[i+1 >> 2] >> 8 * ((i+1)%4)) & 0xff) << 8 ) | ((binarray[i+2 >> 2] >> 8 * ((i+2)%4)) & 0xff); for(var j = 0; j < 4; j++) { if(i * 8 + j * 6 > binarray.length * 32) str += b64pad; else str += tab.charat((triplet >> 6*(3-j)) & 0x3f); } } return str; }
sha1算法
/* * a javascript implementation of the secure hash algorithm, sha-1, as defined * in fips pub 180-1 * version 2.1a copyright paul johnston 2000 - 2002. * other contributors: greg holt, andrew kepert, ydnar, lostinet * distributed under the bsd license * see http://pajhome.org.uk/crypt/md5 for details. */ /* * configurable variables. you may need to tweak these to be compatible with * the server-side, but the defaults work in most cases. */ var hexcase = 0; /* 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_sha1(s){return binb2hex(core_sha1(str2binb(s),s.length * chrsz));} function b64_sha1(s){return binb2b64(core_sha1(str2binb(s),s.length * chrsz));} function str_sha1(s){return binb2str(core_sha1(str2binb(s),s.length * chrsz));} function hex_hmac_sha1(key, data){ return binb2hex(core_hmac_sha1(key, data));} function b64_hmac_sha1(key, data){ return binb2b64(core_hmac_sha1(key, data));} function str_hmac_sha1(key, data){ return binb2str(core_hmac_sha1(key, data));} /* * perform a simple self-test to see if the vm is working */ function sha1_vm_test() { return hex_sha1("abc") == "a9993e364706816aba3e25717850c26c9cd0d89d"; } /* * calculate the sha-1 of an array of big-endian words, and a bit length */ function core_sha1(x, len) { /* append padding */ x[len >> 5] |= 0x80 << (24 - len % 32); x[((len + 64 >> 9) << 4) + 15] = len; var w = array(80); var a = 1732584193; var b = -271733879; var c = -1732584194; var d = 271733878; var e = -1009589776; for(var i = 0; i < x.length; i += 16) { var olda = a; var oldb = b; var oldc = c; var oldd = d; var olde = e; for(var j = 0; j < 80; j++) { if(j < 16) w[j] = x[i + j]; else w[j] = rol(w[j-3] ^ w[j-8] ^ w[j-14] ^ w[j-16], 1); var t = safe_add(safe_add(rol(a, 5), sha1_ft(j, b, c, d)), safe_add(safe_add(e, w[j]), sha1_kt(j))); e = d; d = c; c = rol(b, 30); b = a; a = t; } a = safe_add(a, olda); b = safe_add(b, oldb); c = safe_add(c, oldc); d = safe_add(d, oldd); e = safe_add(e, olde); } return array(a, b, c, d, e); } /* * perform the appropriate triplet combination function for the current * iteration */ function sha1_ft(t, b, c, d) { if(t < 20) return (b & c) | ((~b) & d); if(t < 40) return b ^ c ^ d; if(t < 60) return (b & c) | (b & d) | (c & d); return b ^ c ^ d; } /* * determine the appropriate additive constant for the current iteration */ function sha1_kt(t) { return (t < 20) ? 1518500249 : (t < 40) ? 1859775393 : (t < 60) ? -1894007588 : -899497514; } /* * calculate the hmac-sha1 of a key and some data */ function core_hmac_sha1(key, data) { var bkey = str2binb(key); if(bkey.length > 16) bkey = core_sha1(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_sha1(ipad.concat(str2binb(data)), 512 + data.length * chrsz); return core_sha1(opad.concat(hash), 512 + 160); } /* * 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 rol(num, cnt) { return (num << cnt) | (num >>> (32 - cnt)); } /* * convert an 8-bit or 16-bit string to an array of big-endian words * in 8-bit function, characters >255 have their hi-byte silently ignored. */ function str2binb(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) << (32 - chrsz - i%32); return bin; } /* * convert an array of big-endian words to a string */ function binb2str(bin) { var str = ""; var mask = (1 << chrsz) - 1; for(var i = 0; i < bin.length * 32; i += chrsz) str += string.fromcharcode((bin[i>>5] >>> (32 - chrsz - i%32)) & mask); return str; } /* * convert an array of big-endian words to a hex string. */ function binb2hex(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] >> ((3 - i%4)*8+4)) & 0xf) + hex_tab.charat((binarray[i>>2] >> ((3 - i%4)*8 )) & 0xf); } return str; } /* * convert an array of big-endian words to a base-64 string */ function binb2b64(binarray) { var tab = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789+/"; var str = ""; for(var i = 0; i < binarray.length * 4; i += 3) { var triplet = (((binarray[i >> 2] >> 8 * (3 - i %4)) & 0xff) << 16) | (((binarray[i+1 >> 2] >> 8 * (3 - (i+1)%4)) & 0xff) << 8 ) | ((binarray[i+2 >> 2] >> 8 * (3 - (i+2)%4)) & 0xff); for(var j = 0; j < 4; j++) { if(i * 8 + j * 6 > binarray.length * 32) str += b64pad; else str += tab.charat((triplet >> 6*(3-j)) & 0x3f); } } return str; }
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更多关于javascript相关内容可查看本站专题:《javascript加密解密技巧汇总》、《javascript切换特效与技巧总结》、《javascript查找算法技巧总结》、《javascript动画特效与技巧汇总》、《javascript错误与调试技巧总结》、《javascript数据结构与算法技巧总结》、《javascript遍历算法与技巧总结》及《javascript数学运算用法总结》
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