From e224949e9ff05985eff77b71ab7f09cd35dc4c4f Mon Sep 17 00:00:00 2001
From: emad-salah <emads14@gmail.com>
Date: Fri, 15 Oct 2021 09:21:36 +0100
Subject: [PATCH] Add missing functionality to new ECC encryption

---
 utils/ECC/crypto.js | 17 ++++++++++++++++-
 utils/ECC/index.js  |  4 +++-
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/utils/ECC/crypto.js b/utils/ECC/crypto.js
index 51acbdbe..2a734cb2 100644
--- a/utils/ECC/crypto.js
+++ b/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,
 }
\ No newline at end of file
diff --git a/utils/ECC/index.js b/utils/ECC/index.js
index 4ddac5d4..960067f5 100644
--- a/utils/ECC/index.js
+++ b/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
 }