add optional key and iv for AES-GSM encryption

dist/services/CryptoService/CryptoServiceNode.js

@@ -48,10 +48,12 @@ const getBytes = (value, encoding) => {
     return bytes;
 };
 class CryptoServiceNode {
-    encryptAESGCM(data) {
+    encryptAESGCM(data, key, iv) {
         return __awaiter(this, void 0, void 0, function* () {
-            const key = crypto.randomBytes(32);
-            const iv = crypto.randomBytes(12);
+            if (!key && !iv) {
+                key = crypto.randomBytes(32);
+                iv = crypto.randomBytes(12);
+            }
             const cipher = crypto.createCipheriv(AES_GCM_ALGO, key, iv);
             let encrypted;
             if (typeof data === "string") {

src/services/CryptoService/CryptoServiceNode.ts

@@ -26,10 +26,15 @@ class CryptoServiceNode implements ICryptoService {
   public async encryptAESGCM(data: string): Promise<AESGCMOutput>;
   public async encryptAESGCM(data: ArrayBuffer): Promise<AESGCMOutput>;
   public async encryptAESGCM(
-    data: string | ArrayBuffer
+    data: string | ArrayBuffer,
+    key?: Buffer,
+    iv?: Buffer
   ): Promise<AESGCMOutput> {
-    const key = crypto.randomBytes(32);
-    const iv = crypto.randomBytes(12);
+    if (!key && !iv) {
+      key = crypto.randomBytes(32);
+      iv = crypto.randomBytes(12);
+    }
+
     const cipher = crypto.createCipheriv(AES_GCM_ALGO, key, iv);
 
     let encrypted;