From 1e360f16fea69156ea9df3e314530f8e2fb15b2f Mon Sep 17 00:00:00 2001
From: Pointcheval Hugo <hugo@gitlab.pointcheval.fr>
Date: Sat, 19 Dec 2020 21:44:31 +0100
Subject: [PATCH] Add KeyDerivation implementation in swift

---
 ios/Classes/KeyGeneration.swift | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 ios/Classes/KeyGeneration.swift

diff --git a/ios/Classes/KeyGeneration.swift b/ios/Classes/KeyGeneration.swift
new file mode 100644
index 0000000..a918f9b
--- /dev/null
+++ b/ios/Classes/KeyGeneration.swift
@@ -0,0 +1,25 @@
+//
+//  KeyGeneration.swift
+//
+//  NativeCryptoPlugin
+//
+//  Copyright (c) 2020
+//  Author: Hugo Pointcheval
+//
+import Foundation
+
+class KeyGeneration {
+    func keygen(size : NSNumber) -> Data? {
+        var bytes = [Int8](repeating: 0, count: size.intValue / 8)
+        let status = SecRandomCopyBytes(kSecRandomDefault, bytes.count, &bytes)
+
+        if status == errSecSuccess {
+            let keyBytes = bytes.withUnsafeBytes {
+                return Data(Array($0))
+                
+            }
+            return keyBytes
+        }
+        return nil
+    }
+}