Add missing functionality to new ECC encryption

utils/ECC/crypto.js

@@ -1,4 +1,5 @@
 const { Buffer } = require("buffer");
+const Crypto = require("crypto");
 const FieldError = require("../fieldError")
 
 /**
@@ -17,6 +18,19 @@ const FieldError = require("../fieldError")
  * @prop {string} ephemPublicKey
  */
 
+const generateRandomString = (length = 16) =>
+    new Promise((resolve, reject) => {
+      Crypto.randomBytes(length, (err, buffer) => {
+        if (err) {
+          reject(err)
+          return
+        }
+
+        const token = buffer.toString('hex')
+        resolve(token)
+      })
+    })
+
 /**
  * @param {string} value
  */
@@ -101,10 +115,11 @@ const convertToEncryptedMessage = (encryptedMessage) => {
 };
 
 module.exports = {
+  generateRandomString,
   convertUTF8ToBuffer,
   convertBase64ToBuffer,
   convertBufferToBase64,
   convertToEncryptedMessage,
   convertToEncryptedMessageResponse,
-  processKey
+  processKey,
 }

utils/ECC/index.js

@@ -4,6 +4,7 @@ const Storage = require('node-persist')
 const FieldError = require('../fieldError')
 const logger = require('../../config/log')
 const {
+  generateRandomString,
   convertBufferToBase64,
   processKey,
   convertToEncryptedMessageResponse,
@@ -182,5 +183,6 @@ module.exports = {
   generateKeyPair,
   encryptMessage,
   decryptMessage,
-  authorizeDevice
+  authorizeDevice,
+  generateRandomString
 }