1、base64加密
在页面中引入base64.js文件,调用方法为:
<!DOCTYPE HTML> <html> <head> <meta charset="utf-8"> <title>base64加密</title> <script type="text/javascript" src="http://t.zoukankan.com/base64.js"></script> <script type="text/javascript"> var b = newBase64(); var str = b.encode("admin:admin"); alert("base64 encode:" +str); //解密 str =b.decode(str); alert("base64 decode:" +str); </script> </head> <body> </body> </html>
base64.js
functionBase64() { //private property _keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="; //public method for encoding this.encode = function(input) { var output = ""; varchr1, chr2, chr3, enc1, enc2, enc3, enc4; var i = 0; input =_utf8_encode(input); while (i <input.length) { chr1 = input.charCodeAt(i++); chr2 = input.charCodeAt(i++); chr3 = input.charCodeAt(i++); enc1 = chr1 >> 2; enc2 = ((chr1 & 3) << 4) | (chr2 >> 4); enc3 = ((chr2 & 15) << 2) | (chr3 >> 6); enc4 = chr3 & 63; if(isNaN(chr2)) { enc3 = enc4 = 64; } else if(isNaN(chr3)) { enc4 = 64; } output = output + _keyStr.charAt(enc1) + _keyStr.charAt(enc2) + _keyStr.charAt(enc3) +_keyStr.charAt(enc4); } returnoutput; } //public method for decoding this.decode = function(input) { var output = ""; varchr1, chr2, chr3; varenc1, enc2, enc3, enc4; var i = 0; input = input.replace(/[^A-Za-z0-9+/=]/g, ""); while (i <input.length) { enc1 = _keyStr.indexOf(input.charAt(i++)); enc2 = _keyStr.indexOf(input.charAt(i++)); enc3 = _keyStr.indexOf(input.charAt(i++)); enc4 = _keyStr.indexOf(input.charAt(i++)); chr1 = (enc1 << 2) | (enc2 >> 4); chr2 = ((enc2 & 15) << 4) | (enc3 >> 2); chr3 = ((enc3 & 3) << 6) |enc4; output = output +String.fromCharCode(chr1); if (enc3 != 64) { output = output +String.fromCharCode(chr2); } if (enc4 != 64) { output = output +String.fromCharCode(chr3); } } output =_utf8_decode(output); returnoutput; } //private method for UTF-8 encoding _utf8_encode = function(string) { string = string.replace(/ /g," "); var utftext = ""; for (var n = 0; n < string.length; n++) { var c =string.charCodeAt(n); if (c < 128) { utftext +=String.fromCharCode(c); } else if((c > 127) && (c < 2048)) { utftext += String.fromCharCode((c >> 6) | 192); utftext += String.fromCharCode((c & 63) | 128); } else{ utftext += String.fromCharCode((c >> 12) | 224); utftext += String.fromCharCode(((c >> 6) & 63) | 128); utftext += String.fromCharCode((c & 63) | 128); } } returnutftext; } //private method for UTF-8 decoding _utf8_decode = function(utftext) { var string = ""; var i = 0; var c = c1 = c2 = 0; while ( i <utftext.length ) { c =utftext.charCodeAt(i); if (c < 128) { string +=String.fromCharCode(c); i++; } else if((c > 191) && (c < 224)) { c2 = utftext.charCodeAt(i+1); string += String.fromCharCode(((c & 31) << 6) | (c2 & 63)); i += 2; } else{ c2 = utftext.charCodeAt(i+1); c3 = utftext.charCodeAt(i+2); string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63)); i += 3; } } returnstring; } }
原文:http://www.cnblogs.com/mofish/archive/2012/02/25/2367858.html