asp.net Base64加解密
1.前端
JS:
/* * base64.js * * Licensed under the BSD 3-Clause License. * http://opensource.org/licenses/BSD-3-Clause * * References: * http://en.wikipedia.org/wiki/Base64 */ ; (function (global, factory) { typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory(global) : typeof define === 'function' && define.amd ? define(factory) : factory(global) }(( typeof self !== 'undefined' ? self : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : this ), function (global) { 'use strict'; // existing version for noConflict() global = global || {}; var _Base64 = global.Base64; var version = "2.5.1"; // if node.js and NOT React Native, we use Buffer var buffer; if (typeof module !== 'undefined' && module.exports) { try { buffer = eval("require('buffer').Buffer"); } catch (err) { buffer = undefined; } } // constants var b64chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'; var b64tab = function (bin) { var t = {}; for (var i = 0, l = bin.length; i < l; i++) t[bin.charAt(i)] = i; return t; }(b64chars); var fromCharCode = String.fromCharCode; // encoder stuff var cb_utob = function (c) { if (c.length < 2) { var cc = c.charCodeAt(0); return cc < 0x80 ? c : cc < 0x800 ? (fromCharCode(0xc0 | (cc >>> 6)) + fromCharCode(0x80 | (cc & 0x3f))) : (fromCharCode(0xe0 | ((cc >>> 12) & 0x0f)) + fromCharCode(0x80 | ((cc >>> 6) & 0x3f)) + fromCharCode(0x80 | (cc & 0x3f))); } else { var cc = 0x10000 + (c.charCodeAt(0) - 0xD800) * 0x400 + (c.charCodeAt(1) - 0xDC00); return (fromCharCode(0xf0 | ((cc >>> 18) & 0x07)) + fromCharCode(0x80 | ((cc >>> 12) & 0x3f)) + fromCharCode(0x80 | ((cc >>> 6) & 0x3f)) + fromCharCode(0x80 | (cc & 0x3f))); } }; var re_utob = /[\uD800-\uDBFF][\uDC00-\uDFFFF]|[^\x00-\x7F]/g; var utob = function (u) { return u.replace(re_utob, cb_utob); }; var cb_encode = function (ccc) { var padlen = [0, 2, 1][ccc.length % 3], ord = ccc.charCodeAt(0) << 16 | ((ccc.length > 1 ? ccc.charCodeAt(1) : 0) << 8) | ((ccc.length > 2 ? ccc.charCodeAt(2) : 0)), chars = [ b64chars.charAt(ord >>> 18), b64chars.charAt((ord >>> 12) & 63), padlen >= 2 ? '=' : b64chars.charAt((ord >>> 6) & 63), padlen >= 1 ? '=' : b64chars.charAt(ord & 63) ]; return chars.join(''); }; var btoa = global.btoa ? function (b) { return global.btoa(b); } : function (b) { return b.replace(/[\s\S]{1,3}/g, cb_encode); }; var _encode = function (u) { const isUint8Array = Object.prototype.toString.call(u) === '[object Uint8Array]'; return isUint8Array ? u.toString('base64') : btoa(utob(String(u))); } var encode = function (u, urisafe) { return !urisafe ? _encode(u) : _encode(String(u)).replace(/[+\/]/g, function (m0) { return m0 == '+' ? '-' : '_'; }).replace(/=/g, ''); }; var encodeURI = function (u) { return encode(u, true) }; // decoder stuff var re_btou = new RegExp([ '[\xC0-\xDF][\x80-\xBF]', '[\xE0-\xEF][\x80-\xBF]{2}', '[\xF0-\xF7][\x80-\xBF]{3}' ].join('|'), 'g'); var cb_btou = function (cccc) { switch (cccc.length) { case 4: var cp = ((0x07 & cccc.charCodeAt(0)) << 18) | ((0x3f & cccc.charCodeAt(1)) << 12) | ((0x3f & cccc.charCodeAt(2)) << 6) | (0x3f & cccc.charCodeAt(3)), offset = cp - 0x10000; return (fromCharCode((offset >>> 10) + 0xD800) + fromCharCode((offset & 0x3FF) + 0xDC00)); case 3: return fromCharCode( ((0x0f & cccc.charCodeAt(0)) << 12) | ((0x3f & cccc.charCodeAt(1)) << 6) | (0x3f & cccc.charCodeAt(2)) ); default: return fromCharCode( ((0x1f & cccc.charCodeAt(0)) << 6) | (0x3f & cccc.charCodeAt(1)) ); } }; var btou = function (b) { return b.replace(re_btou, cb_btou); }; var cb_decode = function (cccc) { var len = cccc.length, padlen = len % 4, n = (len > 0 ? b64tab[cccc.charAt(0)] << 18 : 0) | (len > 1 ? b64tab[cccc.charAt(1)] << 12 : 0) | (len > 2 ? b64tab[cccc.charAt(2)] << 6 : 0) | (len > 3 ? b64tab[cccc.charAt(3)] : 0), chars = [ fromCharCode(n >>> 16), fromCharCode((n >>> 8) & 0xff), fromCharCode(n & 0xff) ]; chars.length -= [0, 0, 2, 1][padlen]; return chars.join(''); }; var _atob = global.atob ? function (a) { return global.atob(a); } : function (a) { return a.replace(/\S{1,4}/g, cb_decode); }; var atob = function (a) { return _atob(String(a).replace(/[^A-Za-z0-9\+\/]/g, '')); }; var _decode = buffer ? buffer.from && Uint8Array && buffer.from !== Uint8Array.from ? function (a) { return (a.constructor === buffer.constructor ? a : buffer.from(a, 'base64')).toString(); } : function (a) { return (a.constructor === buffer.constructor ? a : new buffer(a, 'base64')).toString(); } : function (a) { return btou(_atob(a)) }; var decode = function (a) { return _decode( String(a).replace(/[-_]/g, function (m0) { return m0 == '-' ? '+' : '/' }) .replace(/[^A-Za-z0-9\+\/]/g, '') ); }; var noConflict = function () { var Base64 = global.Base64; global.Base64 = _Base64; return Base64; }; // export Base64 global.Base64 = { VERSION: version, atob: atob, btoa: btoa, fromBase64: decode, toBase64: encode, utob: utob, encode: encode, encodeURI: encodeURI, btou: btou, decode: decode, noConflict: noConflict, __buffer__: buffer }; // if ES5 is available, make Base64.extendString() available if (typeof Object.defineProperty === 'function') { var noEnum = function (v) { return { value: v, enumerable: false, writable: true, configurable: true }; }; global.Base64.extendString = function () { Object.defineProperty( String.prototype, 'fromBase64', noEnum(function () { return decode(this) })); Object.defineProperty( String.prototype, 'toBase64', noEnum(function (urisafe) { return encode(this, urisafe) })); Object.defineProperty( String.prototype, 'toBase64URI', noEnum(function () { return encode(this, true) })); }; } // // export Base64 to the namespace // if (global['Meteor']) { // Meteor.js Base64 = global.Base64; } // module.exports and AMD are mutually exclusive. // module.exports has precedence. if (typeof module !== 'undefined' && module.exports) { module.exports.Base64 = global.Base64; } else if (typeof define === 'function' && define.amd) { // AMD. Register as an anonymous module. define([], function () { return global.Base64 }); } // that's it! return { Base64: global.Base64 } }));
使用
Base64.encode(str)
2.后台
帮助类:
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
public static class Base64Helper { /// <summary> /// URL的操作类 /// </summary> static System.Text.Encoding encoding = System.Text.Encoding.UTF8; //public static string Base64DesEncrypt(string strPath) //{ // Encoding encode = Encoding.ASCII; // byte[] bytedata = encode.GetBytes(strPath); // string returnData = Convert.ToBase64String(bytedata, 0, bytedata.Length); // return returnData; //} #region URL的64位编码 public static string Base64Encrypt(string sourthUrl) { string eurl = HttpUtility.UrlEncode(sourthUrl); eurl = Convert.ToBase64String(encoding.GetBytes(eurl)); return eurl; } #endregion #region URL的64位解码 public static string Base64Decrypt(string eStr) { if (!IsBase64(eStr)) { return eStr; } byte[] buffer = Convert.FromBase64String(eStr); string sourthUrl = encoding.GetString(buffer); sourthUrl = HttpUtility.UrlDecode(sourthUrl); return sourthUrl; } /// <summary> /// 是否是Base64字符串 /// </summary> /// <param name="eStr"></param> /// <returns></returns> public static bool IsBase64(string eStr) { if ((eStr.Length % 4) != 0) { return false; } if (!Regex.IsMatch(eStr, "^[A-Z0-9/+=]*$", RegexOptions.IgnoreCase)) { return false; } return true; } #endregion /// <summary> /// 添加URL参数 /// </summary> public static string AddParam(string url, string paramName, string value) { Uri uri = new Uri(url); if (string.IsNullOrEmpty(uri.Query)) { string eval = HttpContext.Current.Server.UrlEncode(value); return String.Concat(url, "?" + paramName + "=" + eval); } else { string eval = HttpContext.Current.Server.UrlEncode(value); return String.Concat(url, "&" + paramName + "=" + eval); } } /// <summary> /// 更新URL参数 /// </summary> public static string UpdateParam(string url, string paramName, string value) { string keyWord = paramName + "="; int index = url.IndexOf(keyWord) + keyWord.Length; int index1 = url.IndexOf("&", index); if (index1 == -1) { url = url.Remove(index, url.Length - index); url = string.Concat(url, value); return url; } url = url.Remove(index, index1 - index); url = url.Insert(index, value); return url; } #region 分析URL所属的域 public static void GetDomain(string fromUrl, out string domain, out string subDomain) { domain = ""; subDomain = ""; try { if (fromUrl.IndexOf("的名片") > -1) { subDomain = fromUrl; domain = "名片"; return; } UriBuilder builder = new UriBuilder(fromUrl); fromUrl = builder.ToString(); Uri u = new Uri(fromUrl); if (u.IsWellFormedOriginalString()) { if (u.IsFile) { subDomain = domain = "客户端本地文件路径"; } else { string Authority = u.Authority; string[] ss = u.Authority.Split('.'); if (ss.Length == 2) { Authority = "www." + Authority; } int index = Authority.IndexOf('.', 0); domain = Authority.Substring(index + 1, Authority.Length - index - 1) .Replace("comhttp", "com"); subDomain = Authority.Replace("comhttp", "com"); if (ss.Length < 2) { domain = "不明路径"; subDomain = "不明路径"; } } } else { if (u.IsFile) { subDomain = domain = "客户端本地文件路径"; } else { subDomain = domain = "不明路径"; } } } catch { subDomain = domain = "不明路径"; } } /// <summary> /// 分析 url 字符串中的参数信息 /// </summary> /// <param name="url">输入的 URL</param> /// <param name="baseUrl">输出 URL 的基础部分</param> /// <param name="nvc">输出分析后得到的 (参数名,参数值) 的集合</param> public static void ParseUrl(string url, out string baseUrl, out NameValueCollection nvc) { if (url == null) throw new ArgumentNullException("url"); nvc = new NameValueCollection(); baseUrl = ""; if (url == "") return; int questionMarkIndex = url.IndexOf('?'); if (questionMarkIndex == -1) { baseUrl = url; return; } baseUrl = url.Substring(0, questionMarkIndex); if (questionMarkIndex == url.Length - 1) return; string ps = url.Substring(questionMarkIndex + 1); // 开始分析参数对 Regex re = new Regex(@"(^|&)?(\w+)=([^&]+)(&|$)?", RegexOptions.Compiled); MatchCollection mc = re.Matches(ps); foreach (Match m in mc) { nvc.Add(m.Result("$2").ToLower(), m.Result("$3")); } } #endregion }