<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>www.jb51.net aes.js</title> </head> <body> <script> // Create Base64 Objectvar Base64 = { _keyStr: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=", encode: function (e) { var t = ""; var n, r, i, s, o, u, a; var f = 0; e = Base64._utf8_encode(e); while (f < e.length) { n = e.charCodeAt(f++); r = e.charCodeAt(f++); i = e.charCodeAt(f++); s = n >> 2; o = (n & 3) << 4 | r >> 4; u = (r & 15) << 2 | i >> 6; a = i & 63; if (isNaN(r)) { u = a = 64 } else if (isNaN(i)) { a = 64 } t = t + this._keyStr.charAt(s) + this._keyStr.charAt(o) + this._keyStr.charAt(u) + this._keyStr.charAt(a) } return t }, decode: function (e) { var t = ""; var n, r, i; var s, o, u, a; var f = 0; e = e.replace(/[^A-Za-z0-9+/=]/g, ""); while (f < e.length) { s = this._keyStr.indexOf(e.charAt(f++)); o = this._keyStr.indexOf(e.charAt(f++)); u = this._keyStr.indexOf(e.charAt(f++)); a = this._keyStr.indexOf(e.charAt(f++)); n = s << 2 | o >> 4; r = (o & 15) << 4 | u >> 2; i = (u & 3) << 6 | a; t = t + String.fromCharCode(n); if (u != 64) { t = t + String.fromCharCode(r) } if (a != 64) { t = t + String.fromCharCode(i) } } t = Base64._utf8_decode(t); return t }, _utf8_encode: function (e) { e = e.replace(/rn/g, "n"); var t = ""; for (var n = 0; n < e.length; n++) { var r = e.charCodeAt(n); if (r < 128) { t += String.fromCharCode(r) } else if (r > 127 && r < 2048) { t += String.fromCharCode(r >> 6 | 192); t += String.fromCharCode(r & 63 | 128) } else { t += String.fromCharCode(r >> 12 | 224); t += String.fromCharCode(r >> 6 & 63 | 128); t += String.fromCharCode(r & 63 | 128) } } return t }, _utf8_decode: function (e) { var t = ""; var n = 0; var r = c1 = c2 = 0; while (n < e.length) { r = e.charCodeAt(n); if (r < 128) { t += String.fromCharCode(r); n++ } else if (r > 191 && r < 224) { c2 = e.charCodeAt(n + 1); t += String.fromCharCode((r & 31) << 6 | c2 & 63); n += 2 } else { c2 = e.charCodeAt(n + 1); c3 = e.charCodeAt(n + 2); t += String.fromCharCode((r & 15) << 12 | (c2 & 63) << 6 | c3 & 63); n += 3 } } return t } } // Define the string var string = 'Hello World!'; // Encode the String var encodedString = Base64.encode(string); console.log(encodedString); // Outputs: "SGVsbG8gV29ybGQh" // Decode the String var decodedString = Base64.decode(encodedString); console.log(decodedString); // Outputs: "Hello World!" //这个自定义的Base64对象可以转码的字符也不仅限于Latin1字符; var string = "Hello, ccccc！"; var encodedString = Base64.encode(string);//"SGVsbG8sIOS4reWbve+8gQ==" console.log(encodedString); var decodedString = Base64.decode(encodedString); console.log(decodedString); console.log("hahahhaha"); </script> </body> </html>
使用python解密
>>> import base64 >>> base64.b64decode("SGVsbG8sIGNjY2Nj77yB").decode() 'Hello, ccccc！' >>> base64.b64decode("SGVsbG8sIGNjY2Nj77yB").decode("utf-8") 'Hello, ccccc！'
参考：
https://www.cnblogs.com/songzhixue/p/11253243.html