(function() { var nodeEnv = typeof require !== 'undefined' && typeof process !== 'undefined'; var __module = nodeEnv ? module : {exports:{}}; var __filename = 'preview-scripts/assets/script/mk/utils/EncryptUtil.js'; var __require = nodeEnv ? function (request) { return cc.require(request); } : function (request) { return __quick_compile_project__.require(request, __filename); }; function __define (exports, require, module) { if (!nodeEnv) {__quick_compile_project__.registerModule(__filename, module);}"use strict"; cc._RF.push(module, '4dd7c+x4MRMUpC9k5xzhEUq', 'EncryptUtil'); // script/mk/utils/EncryptUtil.ts "use strict"; Object.defineProperty(exports, "__esModule", { value: true }); exports.EncryptUtil = void 0; var hmacSha256_1 = require("./encrypt/hmacSha256"); var CryptoJS = require("./encrypt/aes.js"); /** * 加密解密工具类 * @author 邹勇 */ var EncryptUtil = /** @class */ (function () { function EncryptUtil() { this.options = { default_key_size: 2048, default_public_exponent: new Uint8Array([0x01, 0x00, 0x01]) }; } /** * 随机生成多位字符串 * @param len 字符串长度 * @returns */ EncryptUtil.prototype.randomString = function (len) { if (len === void 0) { len = 32; } var $chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnoprstuvwxyz123456789'; var maxPos = $chars.length; var pwd = ''; for (var i = 0; i < len; i++) { pwd += $chars.charAt(Math.floor(Math.random() * maxPos)); } return pwd; }; //说明: // 1.如果加密解密涉及到前端和后端,则这里的key要保持和后端的key一致 // 2.AES的算法模式有好几种(ECB,CBC,CFB,OFB),所以也要和后端保持一致 // 3.AES的补码方式有两种(PKS5,PKS7),所以也要和后端保持一致 // 4.AES的密钥长度有三种(128,192,256,默认是128),所以也要和后端保持一致 // 5.AES的加密结果编码方式有两种(base64和十六进制),具体怎么选择由自己定,但是加密和解密的编码方式要统一 //十六位十六进制数作为秘钥 // private public key = fun_aes.CryptoJS.enc.Utf8.parse("3454345434543454"); //十六位十六进制数作为秘钥偏移量 // private public iv = fun_aes.CryptoJS.enc.Utf8.parse('6666666666666666'); /** * 说明: * 1.如果加密解密涉及到前端和后端,则这里的key要保持和后端的key一致 * 2.AES的算法模式有好几种(ECB,CBC,CFB,OFB),所以也要和后端保持一致 * 3.AES的补码方式有两种(PKS5,PKS7),所以也要和后端保持一致 * 4.AES的密钥长度有三种(128,192,256,默认是128),所以也要和后端保持一致 * 5.AES的加密结果编码方式有两种(base64和十六进制),具体怎么选择由自己定,但是加密和解密的编码方式要统一 * 十六位十六进制数作为秘钥 * private public key = fun_aes.CryptoJS.enc.Utf8.parse("3454345434543454"); * 十六位十六进制数作为秘钥偏移量 * private public iv = fun_aes.CryptoJS.enc.Utf8.parse('6666666666666666'); * * aes加密 * @param word 需要加密的字符串 * @param tkey 加密key,一般为sessionkey * @param appid 游戏的appid * @param state true 存包长 false /r/n * @returns */ EncryptUtil.prototype.encrypt = function (word, tkey, appid, state) { if (state === void 0) { state = true; } var tiv = tkey.substr(0, 16); //明文拼接 var newStr = ''; if (state) { newStr = tiv + word + appid; } else { newStr = tiv + word + '\r\n' + appid; } //加密后 var key = CryptoJS.enc.Utf8.parse(tkey); var iv = CryptoJS.enc.Utf8.parse(tiv); newStr = CryptoJS.enc.Utf8.parse(newStr); var encrypted = CryptoJS.AES.encrypt(newStr, key, { iv: iv, mode: CryptoJS.mode.CBC, padding: CryptoJS.pad.Pkcs7 }); encrypted = encrypted.toString(); var mac = hmacSha256_1.hmacSha256.Instance.hex_hmac_sha256(tkey, encrypted); return CryptoJS.enc.Base64.stringify(CryptoJS.enc.Utf8.parse(tiv + encrypted + mac)); }; /** * aes解密 * @param word 需要加密的字符串 * @param tkey 加密key,一般为sessionkey * @param appid 游戏的appid * @param state true 存包长 false /r/n * @returns */ EncryptUtil.prototype.decrypt = function (word, tkey, appid, state) { if (state === void 0) { state = true; } var en = CryptoJS.enc.Base64.parse(word).toString(CryptoJS.enc.Utf8); var newStrOne = en.substr(16); var temp = newStrOne.substr(0, newStrOne.length - 64); var de = temp; var key = CryptoJS.enc.Utf8.parse(tkey); var iv = CryptoJS.enc.Utf8.parse(tkey.substr(0, 16)); var decrypt = CryptoJS.AES.decrypt(de, key, { iv: iv, mode: CryptoJS.mode.CBC, padding: CryptoJS.pad.Pkcs7 }); var decryptedStr = CryptoJS.enc.Utf8.stringify(decrypt); decryptedStr = decryptedStr.toString(); var newStrThree = ''; if (state) { newStrThree = decryptedStr.slice(16).replace(new RegExp("(.*)" + appid), '$1'); } else { newStrThree = decryptedStr.slice(16).split('\r\n')[0]; } return newStrThree; }; /** * rsa加密 * @param word 需要加密的字符串 * @param isLong 字符串加长版 * @returns */ EncryptUtil.prototype.rsaEncrypt = function (word, isLong) { if (isLong === void 0) { isLong = false; } var jsb = new window['JSEncrypt'](this.options); //公钥 var publicString = '-----BEGIN PUBLIC KEY-----\n' + 'MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuwz5V8wt525dMS+A9wOd\n' + 'NAjvKgxdyoXYuZSlAJEXLhvJlaXwFCKEsUg/qBBeo4nrRnwaFAjG7ItqbCWR9Ozv\n' + '6oY5tMYQnFFK82XkMGbKm1gG0z9vYKhcNYgHZHi+QKAw4tLLWXWO/QBTGelEXptD\n' + 'azlNmdM+8wHOknTcMuIyjc9Yo5qCoNsCJpA465vnREiBezBbKB3rSw+LmrRcZcFk\n' + 's8hmGtjpabcQ8sCxco7mRzVh6/DomNWfNm7hUP6shrrJirwjQtaS51grlScj8KhN\n' + 'h+kBoiI4Ad0Xz0GHasK5hAMf3sXDsN61r0An8KTfa/nsYSJDwogPIKkeKAsmw9Df\n' + 'EQIDAQAB\n' + '-----END PUBLIC KEY-----'; jsb.setPublicKey(publicString); // 加密内容 var encrypted = isLong ? jsb.encryptLong(word) : jsb.encrypt(word); return encrypted; }; /** * for php pack( N , length ) * @param len * @returns */ EncryptUtil.prototype.pack = function (len) { var buf = new ArrayBuffer(4); var dataView = new DataView(buf); dataView.setUint32(0, len); var str2 = this.ab2str(buf); return str2; }; /** * * @param array * @returns */ EncryptUtil.prototype.utf8ArrayToStr = function (array) { var out, i, len, c; var char2, char3; out = ""; len = array.length; i = 0; while (i < len) { c = array[i++]; switch (c >> 4) { case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7: // 0xxxxxxx out += String.fromCharCode(c); break; case 12: case 13: // 110x xxxx 10xx xxxx char2 = array[i++]; out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F)); break; case 14: // 1110 xxxx 10xx xxxx 10xx xxxx char2 = array[i++]; char3 = array[i++]; out += String.fromCharCode(((c & 0x0F) << 12) | ((char2 & 0x3F) << 6) | ((char3 & 0x3F) << 0)); break; } } return out; }; /** * UTF-16转UTF-8 * @param s * @returns */ EncryptUtil.prototype.utf16ToUtf8 = function (s) { if (!s) { return; } var i, code, ret = [], len = s.length; for (i = 0; i < len; i++) { code = s.charCodeAt(i); if (code > 0x0 && code <= 0x7f) { //单字节 //UTF-16 0000 - 007F //UTF-8 0xxxxxxx ret.push(s.charAt(i)); } else if (code >= 0x80 && code <= 0x7ff) { //双字节 //UTF-16 0080 - 07FF //UTF-8 110xxxxx 10xxxxxx ret.push( //110xxxxx String.fromCharCode(0xc0 | ((code >> 6) & 0x1f)), //10xxxxxx String.fromCharCode(0x80 | (code & 0x3f))); } else if (code >= 0x800 && code <= 0xffff) { //三字节 //UTF-16 0800 - FFFF //UTF-8 1110xxxx 10xxxxxx 10xxxxxx ret.push( //1110xxxx String.fromCharCode(0xe0 | ((code >> 12) & 0xf)), //10xxxxxx String.fromCharCode(0x80 | ((code >> 6) & 0x3f)), //10xxxxxx String.fromCharCode(0x80 | (code & 0x3f))); } } return ret.join(''); }; /** * UTF-8转UTF-16 * @param s * @returns */ EncryptUtil.prototype.utf8ToUtf16 = function (s) { if (!s) { return; } var i, codes, bytes, ret = [], len = s.length; for (i = 0; i < len; i++) { codes = []; codes.push(s.charCodeAt(i)); if (((codes[0] >> 7) & 0xff) == 0x0) { //单字节 0xxxxxxx ret.push(s.charAt(i)); } else if (((codes[0] >> 5) & 0xff) == 0x6) { //双字节 110xxxxx 10xxxxxx codes.push(s.charCodeAt(++i)); bytes = []; bytes.push(codes[0] & 0x1f); bytes.push(codes[1] & 0x3f); ret.push(String.fromCharCode((bytes[0] << 6) | bytes[1])); } else if (((codes[0] >> 4) & 0xff) == 0xe) { //三字节 1110xxxx 10xxxxxx 10xxxxxx codes.push(s.charCodeAt(++i)); codes.push(s.charCodeAt(++i)); bytes = []; bytes.push((codes[0] << 4) | ((codes[1] >> 2) & 0xf)); bytes.push(((codes[1] & 0x3) << 6) | (codes[2] & 0x3f)); ret.push(String.fromCharCode((bytes[0] << 8) | bytes[1])); } } return ret.join(''); }; /** * ArrayBuffer转为字符串,参数为ArrayBuffer对象 * @param buf * @returns */ EncryptUtil.prototype.ab2str = function (buf) { return String.fromCharCode.apply(null, new Uint8Array(buf)); }; /** * * @param fileData * @returns */ EncryptUtil.prototype.uint8ArrayToString = function (fileData) { var dataString = ""; for (var i = 0; i < fileData.length; i++) { dataString += String.fromCharCode(fileData[i]); } return dataString; }; /** * * @param str * @returns */ EncryptUtil.prototype.stringToUint8Array = function (str) { var arr = []; for (var i = 0, j = str.length; i < j; ++i) { arr.push(str.charCodeAt(i)); } var tmpUint8Array = new Uint8Array(arr); return tmpUint8Array; }; /** * 字符串转为ArrayBuffer对象,参数为字符串 * @param str * @returns */ EncryptUtil.prototype.str2ab = function (str) { var buf = new ArrayBuffer(str.length); // 每个字符占用2个字节 var bufView = new Uint8Array(buf); for (var i = 0, strLen = str.length; i < strLen; i++) { bufView[i] = str.charCodeAt(i); } return buf; }; return EncryptUtil; }()); exports.EncryptUtil = EncryptUtil; cc._RF.pop(); } if (nodeEnv) { __define(__module.exports, __require, __module); } else { __quick_compile_project__.registerModuleFunc(__filename, function () { __define(__module.exports, __require, __module); }); } })(); //# 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{ hmacSha256 } from \"./encrypt/hmacSha256\"\r\nimport * as CryptoJS from \"./encrypt/aes.js\"\r\n\r\n/**\r\n * 加密解密工具类\r\n * @author 邹勇\r\n */\r\nexport class EncryptUtil {\r\n\r\n    /**\r\n     * 随机生成多位字符串\r\n     * @param   len    字符串长度\r\n     * @returns \r\n     */\r\n    public randomString(len = 32) {\r\n        let $chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnoprstuvwxyz123456789';\r\n        let maxPos = $chars.length;\r\n        let pwd = '';\r\n        for (let i = 0; i < len; i++) {\r\n            pwd += $chars.charAt(Math.floor(Math.random() * maxPos))\r\n        }\r\n        return pwd;\r\n    }\r\n\r\n    //说明：\r\n    //  1.如果加密解密涉及到前端和后端，则这里的key要保持和后端的key一致\r\n    //  2.AES的算法模式有好几种（ECB,CBC,CFB,OFB），所以也要和后端保持一致\r\n    //  3.AES的补码方式有两种（PKS5，PKS7），所以也要和后端保持一致\r\n    //  4.AES的密钥长度有三种（128,192,256，默认是128），所以也要和后端保持一致\r\n    //  5.AES的加密结果编码方式有两种（base64和十六进制），具体怎么选择由自己定，但是加密和解密的编码方式要统一\r\n    //十六位十六进制数作为秘钥\r\n    // private public key = fun_aes.CryptoJS.enc.Utf8.parse(\"3454345434543454\");\r\n    //十六位十六进制数作为秘钥偏移量\r\n    // private public iv = fun_aes.CryptoJS.enc.Utf8.parse('6666666666666666');\r\n\r\n    /**\r\n     * 说明：\r\n     * 1.如果加密解密涉及到前端和后端，则这里的key要保持和后端的key一致\r\n     * 2.AES的算法模式有好几种（ECB,CBC,CFB,OFB），所以也要和后端保持一致\r\n     * 3.AES的补码方式有两种（PKS5，PKS7），所以也要和后端保持一致\r\n     * 4.AES的密钥长度有三种（128,192,256，默认是128），所以也要和后端保持一致\r\n     * 5.AES的加密结果编码方式有两种（base64和十六进制），具体怎么选择由自己定，但是加密和解密的编码方式要统一\r\n     * 十六位十六进制数作为秘钥\r\n     * private public key = fun_aes.CryptoJS.enc.Utf8.parse(\"3454345434543454\");\r\n     * 十六位十六进制数作为秘钥偏移量\r\n     * private public iv = fun_aes.CryptoJS.enc.Utf8.parse('6666666666666666');\r\n     * \r\n     * aes加密\r\n     * @param   word    需要加密的字符串\r\n     * @param   tkey    加密key，一般为sessionkey\r\n     * @param   appid   游戏的appid\r\n     * @param   state   true 存包长 false /r/n\r\n     * @returns \r\n    */\r\n    public encrypt(word, tkey, appid, state = true) {\r\n        let tiv = tkey.substr(0, 16);\r\n\r\n        //明文拼接\r\n        let newStr = '';\r\n        if (state) {\r\n            newStr = tiv + word + appid;\r\n        }\r\n        else {\r\n            newStr = tiv + word + '\\r\\n' + appid;\r\n        }\r\n\r\n        //加密后\r\n        let key = CryptoJS.enc.Utf8.parse(tkey);\r\n        let iv = CryptoJS.enc.Utf8.parse(tiv);\r\n\r\n        newStr = CryptoJS.enc.Utf8.parse(newStr);\r\n        let encrypted = CryptoJS.AES.encrypt(newStr, key, { iv: iv, mode: CryptoJS.mode.CBC, padding: CryptoJS.pad.Pkcs7 });\r\n        encrypted = encrypted.toString();\r\n        let mac = hmacSha256.Instance.hex_hmac_sha256(tkey, encrypted);\r\n        return CryptoJS.enc.Base64.stringify(CryptoJS.enc.Utf8.parse(tiv + encrypted + mac));\r\n    }\r\n\r\n    /**\r\n     * aes解密\r\n     * @param   word    需要加密的字符串\r\n     * @param   tkey    加密key，一般为sessionkey\r\n     * @param   appid   游戏的appid\r\n     * @param   state   true 存包长 false /r/n\r\n     * @returns \r\n     */\r\n    public decrypt(word, tkey, appid, state = true) {\r\n        let en = CryptoJS.enc.Base64.parse(word).toString(CryptoJS.enc.Utf8);\r\n        let newStrOne = en.substr(16);\r\n        let temp = newStrOne.substr(0, newStrOne.length - 64);\r\n        let de = temp;\r\n\r\n        let key = CryptoJS.enc.Utf8.parse(tkey);\r\n        let iv = CryptoJS.enc.Utf8.parse(tkey.substr(0, 16));\r\n\r\n        let decrypt = CryptoJS.AES.decrypt(de, key, { iv: iv, mode: CryptoJS.mode.CBC, padding: CryptoJS.pad.Pkcs7 });\r\n        let decryptedStr = CryptoJS.enc.Utf8.stringify(decrypt);\r\n        decryptedStr = decryptedStr.toString();\r\n\r\n        let newStrThree = '';\r\n        if (state) {\r\n            newStrThree = decryptedStr.slice(16).replace(new RegExp(\"(.*)\" + appid), '$1');\r\n        }\r\n        else {\r\n            newStrThree = decryptedStr.slice(16).split('\\r\\n')[0];\r\n        }\r\n        return newStrThree;\r\n    }\r\n\r\n    private options = {\r\n        default_key_size: 2048,\r\n        default_public_exponent: new Uint8Array([0x01, 0x00, 0x01])\r\n    }\r\n    /**\r\n     * rsa加密\r\n     * @param   word        需要加密的字符串\r\n     * @param   isLong      字符串加长版\r\n     * @returns \r\n     */\r\n    public rsaEncrypt(word, isLong: boolean = false) {\r\n        let jsb = new window['JSEncrypt'](this.options);\r\n\r\n        //公钥\r\n        let publicString = '-----BEGIN PUBLIC KEY-----\\n' +\r\n            'MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuwz5V8wt525dMS+A9wOd\\n' +\r\n            'NAjvKgxdyoXYuZSlAJEXLhvJlaXwFCKEsUg/qBBeo4nrRnwaFAjG7ItqbCWR9Ozv\\n' +\r\n            '6oY5tMYQnFFK82XkMGbKm1gG0z9vYKhcNYgHZHi+QKAw4tLLWXWO/QBTGelEXptD\\n' +\r\n            'azlNmdM+8wHOknTcMuIyjc9Yo5qCoNsCJpA465vnREiBezBbKB3rSw+LmrRcZcFk\\n' +\r\n            's8hmGtjpabcQ8sCxco7mRzVh6/DomNWfNm7hUP6shrrJirwjQtaS51grlScj8KhN\\n' +\r\n            'h+kBoiI4Ad0Xz0GHasK5hAMf3sXDsN61r0An8KTfa/nsYSJDwogPIKkeKAsmw9Df\\n' +\r\n            'EQIDAQAB\\n' +\r\n            '-----END PUBLIC KEY-----'\r\n        jsb.setPublicKey(publicString);\r\n        // 加密内容\r\n        let encrypted = isLong ? jsb.encryptLong(word) : jsb.encrypt(word);\r\n        return encrypted;\r\n    }\r\n\r\n    /**\r\n     * for php pack( N , length )\r\n     * @param   len    \r\n     * @returns \r\n     */\r\n    public pack(len: number) {\r\n        let buf: ArrayBuffer = new ArrayBuffer(4);\r\n        let dataView = new DataView(buf);\r\n        dataView.setUint32(0, len);\r\n        let str2 = this.ab2str(buf);\r\n        return str2;\r\n    }\r\n\r\n    /**\r\n     * \r\n     * @param array \r\n     * @returns \r\n     */\r\n    public utf8ArrayToStr(array) {\r\n        let out, i, len, c;\r\n        let char2, char3;\r\n\r\n        out = \"\";\r\n        len = array.length;\r\n        i = 0;\r\n        while (i < len) {\r\n            c = array[i++];\r\n            switch (c >> 4) {\r\n                case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:\r\n                    // 0xxxxxxx\r\n                    out += String.fromCharCode(c);\r\n                    break;\r\n                case 12: case 13:\r\n                    // 110x xxxx   10xx xxxx\r\n                    char2 = array[i++];\r\n                    out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F));\r\n                    break;\r\n                case 14:\r\n                    // 1110 xxxx  10xx xxxx  10xx xxxx\r\n                    char2 = array[i++];\r\n                    char3 = array[i++];\r\n                    out += String.fromCharCode(((c & 0x0F) << 12) |\r\n                        ((char2 & 0x3F) << 6) |\r\n                        ((char3 & 0x3F) << 0));\r\n                    break;\r\n            }\r\n        }\r\n\r\n        return out;\r\n    }\r\n\r\n    /**\r\n     * UTF-16转UTF-8\r\n     * @param   s \r\n     * @returns \r\n     */\r\n    public utf16ToUtf8(s) {\r\n        if (!s) {\r\n            return;\r\n        }\r\n\r\n        let i, code, ret = [], len = s.length;\r\n        for (i = 0; i < len; i++) {\r\n            code = s.charCodeAt(i);\r\n            if (code > 0x0 && code <= 0x7f) {\r\n                //单字节\r\n                //UTF-16 0000 - 007F\r\n                //UTF-8  0xxxxxxx\r\n                ret.push(s.charAt(i));\r\n            } else if (code >= 0x80 && code <= 0x7ff) {\r\n                //双字节\r\n                //UTF-16 0080 - 07FF\r\n                //UTF-8  110xxxxx 10xxxxxx\r\n                ret.push(\r\n                    //110xxxxx\r\n                    String.fromCharCode(0xc0 | ((code >> 6) & 0x1f)),\r\n                    //10xxxxxx\r\n                    String.fromCharCode(0x80 | (code & 0x3f))\r\n                );\r\n            } else if (code >= 0x800 && code <= 0xffff) {\r\n                //三字节\r\n                //UTF-16 0800 - FFFF\r\n                //UTF-8  1110xxxx 10xxxxxx 10xxxxxx\r\n                ret.push(\r\n                    //1110xxxx\r\n                    String.fromCharCode(0xe0 | ((code >> 12) & 0xf)),\r\n                    //10xxxxxx\r\n                    String.fromCharCode(0x80 | ((code >> 6) & 0x3f)),\r\n                    //10xxxxxx\r\n                    String.fromCharCode(0x80 | (code & 0x3f))\r\n                );\r\n            }\r\n        }\r\n\r\n        return ret.join('');\r\n    }\r\n\r\n    /**\r\n     * UTF-8转UTF-16\r\n     * @param s \r\n     * @returns \r\n     */\r\n    public utf8ToUtf16(s) {\r\n        if (!s) {\r\n            return;\r\n        }\r\n\r\n        let i, codes, bytes, ret = [], len = s.length;\r\n        for (i = 0; i < len; i++) {\r\n            codes = [];\r\n            codes.push(s.charCodeAt(i));\r\n            if (((codes[0] >> 7) & 0xff) == 0x0) {\r\n                //单字节  0xxxxxxx\r\n                ret.push(s.charAt(i));\r\n            } else if (((codes[0] >> 5) & 0xff) == 0x6) {\r\n                //双字节  110xxxxx 10xxxxxx\r\n                codes.push(s.charCodeAt(++i));\r\n                bytes = [];\r\n                bytes.push(codes[0] & 0x1f);\r\n                bytes.push(codes[1] & 0x3f);\r\n                ret.push(String.fromCharCode((bytes[0] << 6) | bytes[1]));\r\n            } else if (((codes[0] >> 4) & 0xff) == 0xe) {\r\n                //三字节  1110xxxx 10xxxxxx 10xxxxxx\r\n                codes.push(s.charCodeAt(++i));\r\n                codes.push(s.charCodeAt(++i));\r\n                bytes = [];\r\n                bytes.push((codes[0] << 4) | ((codes[1] >> 2) & 0xf));\r\n                bytes.push(((codes[1] & 0x3) << 6) | (codes[2] & 0x3f));\r\n                ret.push(String.fromCharCode((bytes[0] << 8) | bytes[1]));\r\n            }\r\n        }\r\n        return ret.join('');\r\n    }\r\n\r\n    /**\r\n     * ArrayBuffer转为字符串，参数为ArrayBuffer对象\r\n     * @param buf \r\n     * @returns \r\n     */\r\n    public ab2str(buf: ArrayBuffer) {\r\n        return String.fromCharCode.apply(null, new Uint8Array(buf));\r\n    }\r\n\r\n    /**\r\n     * \r\n     * @param fileData \r\n     * @returns \r\n     */\r\n    public uint8ArrayToString(fileData) {\r\n        let dataString = \"\";\r\n        for (let i = 0; i < fileData.length; i++) {\r\n            dataString += String.fromCharCode(fileData[i]);\r\n        }\r\n\r\n        return dataString\r\n    }\r\n\r\n    /**\r\n     * \r\n     * @param str \r\n     * @returns \r\n     */\r\n    public stringToUint8Array(str) {\r\n        let arr = [];\r\n        for (let i = 0, j = str.length; i < j; ++i) {\r\n            arr.push(str.charCodeAt(i));\r\n        }\r\n\r\n        let tmpUint8Array = new Uint8Array(arr);\r\n        return tmpUint8Array\r\n    }\r\n\r\n    /**\r\n     * 字符串转为ArrayBuffer对象，参数为字符串\r\n     * @param str \r\n     * @returns \r\n     */\r\n    public str2ab(str) {\r\n        let buf = new ArrayBuffer(str.length); // 每个字符占用2个字节\r\n        let bufView = new Uint8Array(buf);\r\n        for (let i = 0, strLen = str.length; i < strLen; i++) {\r\n            bufView[i] = str.charCodeAt(i);\r\n        }\r\n        return buf;\r\n    }\r\n\r\n}"]}