no message

+logs/
+npm-debug.log
+yarn-error.log
+node_modules/
+package-lock.json
+yarn.lock
+coverage/
+.idea/
+run/
+.DS_Store
+*.sw*
+*.un~
+typings/
+.nyc_output/

+'use strict';
+
+class DingTalkEncryptException {
+  constructor(code) {
+    // super();
+    this.msgMap = new Map([
+      [ 0, '成功' ],
+      [ 900001, '加密明文文本非法' ],
+      [ 900002, '加密时间戳参数非法' ],
+      [ 900003, '加密随机字符串参数非法' ],
+      [ 900005, '签名不匹配' ],
+      [ 900006, '签名计算失败' ],
+      [ 900004, '不合法的 encodingAesKey' ],
+      [ 900007, '计算加密文字错误' ],
+      [ 900008, '计算解密文字错误' ],
+      [ 900009, '计算解密文字长度不匹配' ],
+      [ 900010, '计算解密文字corpid不匹配' ],
+    ]);
+    this.code = code;
+    this.message = this.msgMap.get(code);
+  }
+
+  toString(){
+    return `DingTalkEncryptException: [${this.code}], ${this.message}\n`;
+  }
+}
+
+module.exports = DingTalkEncryptException;

+/* eslint-disable no-bitwise */
+'use strict';
+
+const CryptoJS  = require("crypto-js");
+const Crypto = require('crypto');
+const DingTalkEncryptException = require('./DingTalkEncryptException');
+
+class DingTalkEncryptor {
+  constructor(token, encodingAesKey, corpIdOrSuiteKey) {
+    this.utf8 = 'utf-8';
+    this.base64 = 'base64';
+    this.AES_ENCODE_KEY_LENGTH = 43;
+    this.RANDOM_LENGTH = 16;
+
+    this.token = token;
+    this.encodingAesKey = encodingAesKey;
+    this.aesKey =  CryptoJS.enc.Base64.parse(encodingAesKey+'=');
+    this.corpId = corpIdOrSuiteKey;
+    this.keySpec = this.aesKey;
+    this.iv =  CryptoJS.enc.Base64.parse((encodingAesKey+'=').substring(0,22));
+  }
+
+  // verify encodingAesKey
+  set encodingAesKey(val) {
+    if (!val || val.length !== this.AES_ENCODE_KEY_LENGTH) {
+      throw new DingTalkEncryptException(900004);
+    }
+  }
+
+  encrypt(random, plainText) {
+    try {
+      const randomBuf = Buffer.from(random);
+      const plainTextBuf = Buffer.from(plainText);
+      const textLen = plainTextBuf.length;
+      const textLenBuf = Buffer.from([(textLen >> 24 & 255), (textLen >> 16 & 255), (textLen >> 8 & 255), (textLen & 255)]);
+      const cropIdBuf = Buffer.from(this.corpId);
+      const padCount = 32 - (randomBuf.length + textLenBuf.length + plainTextBuf.length + cropIdBuf.length) % 32;
+      const padBuf = Buffer.from(new Array(padCount).fill(padCount));
+      const finalBuf = Buffer.concat([randomBuf, textLenBuf, plainTextBuf, cropIdBuf, padBuf]);
+      console.log("randomBuf@@@",randomBuf.toString('utf-8'))
+      console.log("plainTextBuf@@@",plainTextBuf.toString('utf-8'))
+      console.log("textLenBuf@@@",textLen,textLenBuf.toString('hex'))
+      console.log("cropIdBuf@@@",cropIdBuf.toString('utf-8'))
+      console.log("padCount@@@",padCount )
+      console.log("padBuf@@@",padBuf)
+      console.log("finalBuf@@@",finalBuf.toString('hex'))
+ 
+      const encrypted = CryptoJS.AES.encrypt(finalBuf.toString('hex'), this.keySpec, {   
+          iv: this.iv,
+          mode: CryptoJS.mode.CBC,
+          padding:CryptoJS.pad.Pkcs7 
+      }); 
+      return encrypted.toString(CryptoJS.enc.Base64);
+    } catch (e) {
+      console.log(e)
+      throw new DingTalkEncryptException(900007);
+    }
+  }
+
+  decrypt(encrypted) {
+    let decrypt;
+    try {
+      // decrypt   
+      const ciphertext =  CryptoJS.enc.Base64.parse(encrypted);
+      decrypt = CryptoJS.AES.decrypt( {ciphertext}, this.keySpec, {   
+          iv: this.iv,
+          mode: CryptoJS.mode.CBC,
+          padding:CryptoJS.pad.Pkcs7 
+      }); 
+    } catch (e) {
+      throw new DingTalkEncryptException(900008);
+    }
+    //encrypt = Base64_Encode(AES_Encrypt[random(16B) + msg_len(4B) + msg + $key]) 钉钉加密消息格式
+    let cropId;
+    let plainText;  
+    try { 
+
+      const finalDecrypt =  decrypt.toString(CryptoJS.enc.Hex);
+      const textLen = parseInt(finalDecrypt.substring(32,8+32), 16) ;
+      plainText = CryptoJS.enc.Hex.parse(finalDecrypt.substring(40, 40 + textLen*2)).toString( CryptoJS.enc.Utf8);
+      cropId =   CryptoJS.enc.Hex.parse(finalDecrypt.substring(40 + textLen*2)).toString(CryptoJS.enc.Utf8);
+
+    } catch (e) { 
+      throw new DingTalkEncryptException(900009);
+    }
+
+    if (cropId != this.corpId) {
+      console.log(cropId, this.corpId)
+      throw new DingTalkEncryptException(900010);
+    } else {
+      return plainText;
+    }
+  }
+
+  getSignature(token, timestamp, nonce, encrypt) {
+    timestamp = timestamp + '';
+    const strArr = [token, timestamp, nonce, encrypt];
+    strArr.sort();
+    const sha1 = CryptoJS.SHA1(strArr.join('')); 
+    return sha1.toString(CryptoJS.enc.Hex);
+  }
+
+  getEncryptedMap(plaintext, timeStamp, nonce) {
+    timeStamp = timeStamp + '';
+    if (plaintext == null) {
+      throw new DingTalkEncryptException(900001);
+    } else if (timeStamp == null) {
+      throw new DingTalkEncryptException(900002);
+    } else if (nonce == null) {
+      throw new DingTalkEncryptException(900003);
+    } else {
+      const encrypt = this.encrypt(this.getRandomStr(this.RANDOM_LENGTH), plaintext);
+      const signature = this.getSignature(this.token, timeStamp, nonce, encrypt);
+      return {
+        msg_signature: signature,
+        encrypt: encrypt,
+        timeStamp: timeStamp,
+        nonce: nonce
+      };
+    }
+  }
+
+  getDecryptMsg(msgSignature, timeStamp, nonce, encryptMsg) {
+    const signature = this.getSignature(this.token, timeStamp, nonce, encryptMsg);
+    if (signature !== msgSignature) {
+      throw new DingTalkEncryptException(900006);
+    } else {
+      return this.decrypt(encryptMsg);
+    }
+  }
+
+  getRandomStr(size) {
+    const base = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
+    let randomStr = '';
+    for (let i = size; i > 0; --i) {
+      randomStr += base[Math.floor(Math.random() * base.length)];
+    }
+    return randomStr;
+  };
+}
+
+module.exports = DingTalkEncryptor;

+'use strict';
+
+const DingTalkEncryptor = require('./DingTalkEncryptor');
+const utils = require('./Utils');
+
+
+// const DingTalkEncryptException = require('./DingTalkEncryptException');
+
+/** 加解密需要，可以随机填写。如 "12345" */
+const TOKEN = 'OUOdEgcMFxNDqoiADrf';
+/** 加密密钥，用于回调数据的加密，固定为43个字符，从[a-z, A-Z, 0-9]共62个字符中随机生成*/
+// const ENCODING_AES_KEY = 'TXpRMU5qYzRPVEF4TWpNME5UWTNPRGt3TVRJek5EVTI';
+// const ENCODING_AES_KEY = utils.getRandomStr(43);
+const ENCODING_AES_KEY = 'FRArTXHBSiMuyPjOjk4RqhOLuQ54d75A6PyYbFrShJy';
+// console.log('ENCODING_AES_KEY:\n' + ENCODING_AES_KEY);
+// let buffer = Buffer.from(ENCODING_AES_KEY + '=', 'base64');
+// const base64Str  = buffer.toString('base64');
+// console.log(":::::ZZ",buffer.length,base64Str.length,base64Str,(Buffer.from(ENCODING_AES_KEY + '=', 'base64')));
+/** 企业corpid, 可以在钉钉企业管理后台查看（https://oa.dingtalk.com/） */
+// const CORP_ID = 'ding12345678901234567890123456789012';
+const CORP_ID ='dingkuvhxslusd5hkjem';
+/** 实例化加密类 */
+// console.log('\nEncryptor Test:');
+const encryptor = new DingTalkEncryptor(TOKEN, ENCODING_AES_KEY, CORP_ID);
+
+// const plainText = 'success';
+const ENCRYPT_RANDOM_16 = 'aaaabbbbccccdddd';
+// const timeStamp = (new Date().getTime()).toString();
+// const nonce = utils.getRandomStr(8);
+const timeStamp = '1648014018742';
+const nonce = 'AU1FFNAK';
+
+/** 测试加解密响应报文或者字符串 */
+// const testJson = {
+//   EventType: 'bpms_instance_change',
+//   processInstanceId: 'ad253df6-e175caf-68085c60ba8a',
+//   corpId: 'ding2c4d8175651',
+//   createTime: 1495592259000,
+//   title: '自测-1016',
+//   type: 'start',
+//   staffId: 'er5875',
+//   url: 'https://aflow.dingtalk.com/dingtalk/mobile/homepage.htm',
+//   processCode: 'xxx',
+// };
+// const testJson = '中文乱码测试/abc/123dddd';
+
+// // console.log(JSON.parse(JSON.stringify(testJson)));
+const unencryptedJson = 'success';
+// const unencryptedJson = JSON.stringify(testJson);
+// console.log(`  node unencryptedJson:\n ${unencryptedJson}`);
+// const encryptedJson = encryptor.encrypt(ENCRYPT_RANDOM_16, unencryptedJson);
+// console.log(`  \nnode encryptedJson:\n ${encryptedJson}`);
+// const decryptedJson = encryptor.decrypt(encryptedJson);
+// console.log(`  \nnode decryptedJson:\n ${decryptedJson}, (${decryptedJson.length})`);
+// console.log('  \nnode sign:\n ' + encryptor.getSignature(TOKEN, timeStamp, nonce, encryptedJson));
+const signature =  '99011aff26fe6eea2aea3b9f1c17620483e8495d'; 
+const encryptMsg =  'kKCIt2zJ1xPfCex1h3d4ZULhLvXi3RBbht1GxAsYK/Y9iZcw06P20xGTq8Lb9bskrd7fypdzcqo0GHvk+9zLonIXPFNKRTRkswZaH+t1A5683FoDYlXOsBRgpCsjSljo';
+
+const plainText = encryptor.getDecryptMsg(signature, timeStamp, nonce, encryptMsg)
+
+
+console.log("plainText::",plainText)
+
+const result = encryptor.getEncryptedMap(unencryptedJson, timeStamp, utils.getRandomStr(8));
+
+
+console.log("result::",result)
\ No newline at end of file

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+   limitations under the License.

+# dingtalk-encrypt
+DingTalk Encrypt Node Version.  
+Refer to [Java version](https://github.com/opendingtalk/eapp-corp-project.git): 
+
+**Issues:** It's your turn!
+
+# Usage
+## this repository
+- git clone
+- npm install
+- run 'EncryptTest.js' for main APIs.
+
+## npm module
+- npm install --save dingtalk-encrypt
+- use APIs as follows API Doc.
+
+# API Doc
+- Need constants:
+> TOKEN - Random string for signature, unrestricted, such as "123456".  
+  ENCODING_AES_KEY - Secret key for callback data, random 43 characters of [a-z, A-Z, 0-9].  
+  CORP_ID - DingTalk corpId from the [Official OA](https://oa.dingtalk.com).  
+
+- Main APIs([Usage Example](https://open-doc.dingtalk.com/microapp/serverapi2/lo5n6i)):
+  - getEncryptedMap
+  - getDecryptMsg
+  - getSignature
+  - encrypt
+  - decrypt
+
+- Example
+  - 处理钉钉回调
+  ```
+  // 参考：钉钉开发文档-业务事件回调 
+  const DingTalkEncryptor = require('dingtalk-encrypt');
+  const utils = require('dingtalk-encrypt/Utils');
+  /** 加解密需要，可以随机填写。如 "12345" */
+  const TOKEN = '666666';
+  /** 加密密钥，用于回调数据的加密，固定为43个字符，从[a-z, A-Z, 0-9]共62个字符中随机生成*/
+  const ENCODING_AES_KEY = 'TXpRMU5qYzRPVEF4TWpNME5UWTNPRGt3TVRJek5EVTI';
+  // const ENCODING_AES_KEY = utils.getRandomStr(43);
+  /** 企业corpid, 可以在钉钉企业管理后台查看（https://oa.dingtalk.com/） */
+  const CORP_ID = 'ding12345678901234567890123456789012';
+  /** 实例化加密类 */
+  console.log('\nEncryptor Test:');
+  const encryptor = new DingTalkEncryptor(TOKEN, ENCODING_AES_KEY, CORP_ID);
+
+  // 解密钉钉回调数据 
+  const plainText = encryptor.getDecryptMsg(signature, timestamp, nonce, encryptMsg);
+  console.log('DEBUG plainText: ' + plainText);
+  const obj = JSON.parse(plainText);
+  // 回调事件类型，根据事件类型和业务数据处理相应业务
+  const eventType = obj.EventType;
+  // 响应数据：加密'success'，签名等等
+  encryptor.getEncryptedMap('success', timestamp, utils.getRandomStr(8));
+  ```
+  - 单独使用加/解密
+  ```
+  /** 测试加解密响应报文或者字符串 */
+  const testJson = {
+    EventType: 'bpms_instance_change',
+    processInstanceId: 'ad253df6-e175caf-68085c60ba8a',
+    corpId: 'ding2c4d8175651',
+    createTime: 1495592259000,
+    title: '自测-1016',
+    type: 'start',
+    staffId: 'er5875',
+    url: 'https://aflow.dingtalk.com/dingtalk/mobile/homepage.htm',
+    processCode: 'xxx',
+  };
+  // console.log(JSON.parse(JSON.stringify(testJson)));
+  // const unencryptedJson = 'success';
+  const unencryptedJson = JSON.stringify(testJson);
+  console.log(`  node unencryptedJson:\n ${unencryptedJson}`);
+  const encryptedJson = encryptor.encrypt(ENCRYPT_RANDOM_16, unencryptedJson);
+  console.log(`  \nnode encryptedJson:\n ${encryptedJson}`);
+  const decryptedJson = encryptor.decrypt(encryptedJson);
+  console.log(`  \nnode decryptedJson:\n ${decryptedJson}, (${decryptedJson.length})`);
+  console.log('  \nnode sign:\n ' + encryptor.getSignature(TOKEN, timeStamp, nonce, encryptedJson));
+
+  ```
+
+# Thanks To
+- [Authors of crypto-js](https://github.com/brix/crypto-js)
+- [Authors of eapp-corp-project](https://github.com/opendingtalk/eapp-corp-project)

+'use strict';
+
+const int2Bytes = function(count) {
+  const byteArr = [ (count >> 24 & 255), (count >> 16 & 255), (count >> 8 & 255), (count & 255) ];
+  // console.log(`debug int2Bytes: ${count} -> ${byteArr}`);
+  return byteArr;
+};
+const bytes2int = function(byteArr) {
+  let count = 0;
+  for (let i = 0; i < 4; ++i) {
+    count <<= 8;
+    count |= byteArr[i] & 255;
+  }
+  // console.log(`debug bytes2int: ${byteArr} -> ${count}`);
+  return count;
+};
+
+// https://stackoverflow.com/questions/3195865/converting-byte-array-to-string-in-javascript
+const string2Bin = function(str) {
+  const binaryArr = [];
+  for (let i = 0; i < str.length; i++) {
+    binaryArr.push(str.charCodeAt(i));
+  }
+  // console.log(`debug string2Bin: ${str} -> ${binaryArr}`);
+  return binaryArr;
+};
+const bin2String = function(array) {
+  const str = String.fromCharCode.apply(String, array);
+  // console.log(`debug bin2String: ${array} -> ${str}`);
+  return str;
+};
+
+const getRandomStr = function(size) {
+  const base = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
+  let randomStr = '';
+  for (let i = size; i > 0; --i) {
+    randomStr += base[Math.floor(Math.random() * base.length)];
+  }
+  return randomStr;
+};
+
+module.exports = {
+  int2Bytes,
+  bytes2int,
+  string2Bin,
+  bin2String,
+  getRandomStr,
+};
\ No newline at end of file

+'use strict';
+
+(function(root, factory, undef) {
+  if (typeof exports === 'object') {
+    // CommonJS
+    module.exports = exports = factory(require('./DingTalkEncryptor'));
+  }
+}(this, function(DingTalkEncryptor) {
+  return DingTalkEncryptor;
+}));

+{
+  "name": "dingtalk-encrypt",
+  "version": "2.0.0",
+  "description": "dingTalk Encrypt Nodejs Version.",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [
+    "nodejs",
+    "dingtalk",
+    "crypto",
+    "encrypt",
+    "decrypt"
+  ],
+  "author": "senique,zhubg520",
+  "license": "Apache-2.0",
+  "homepage": "http://gitlab.workai.com.cn/fanwh/dingtalk-encrypt",
+  "dependencies": {
+    "crypto-js": "^4.1.1"
+  }
+}

+/*
+* 可以
+*/
+http://www.mytju.com/classcode/tools/encode_utf8.asp
+https://www.qqxiuzi.cn/bianma/Unicode-UTF.php
+https://www.qqxiuzi.cn/bianma/base64.htm
+
+'TXpRMU5qYzRPVEF4TWpNME5UWTNPRGt3TVRJek5EVTI'
+
+Buffer.from(ENCODING_AES_KEY + '=', 'base64')
+
+4d 7a 51 31 4e 6a 63 34 4f 54 41 78 4d 6a 4d 30 4e 54 59 33 4f 44 6b 77 4d 54 49 7a 4e 44 55 32   Unicode编码16进制
+
+4d7a51314e6a63344f5441784d6a4d304e5459334f446b774d54497a4e445532
+
+MzQ1Njc4OTAxMjM0NTY3ODkwMTIzNDU2       UTF8编码
+
+
+/*
+*  随机
+*/
+
+'Q2fHd7jP6f9P20HWFsGmTm8V56srrPVTpvw3q1ESSfv'
+
+43 67 c7 77 b8 cf e9 ff 4f db 41 d6 16 c1 a6 4e 6f 15 e7 ab 2b ac f5 53 a6 fc 37 ab 51 12 49 fb
+
+4367c777b8cfe9ff4fdb41d616c1a64e6f15e7ab2bacf553a6fc37ab511249fb
\ No newline at end of file