feat(core): support one time password (#9798)

packages/backend/server/src/base/helpers/crypto.ts

@@ -5,6 +5,7 @@ import {
   createSign,
   createVerify,
   randomBytes,
+  randomInt,
   timingSafeEqual,
 } from 'node:crypto';
 
@@ -109,6 +110,20 @@ export class CryptoHelper {
     return randomBytes(length);
   }
 
+  randomInt(min: number, max: number) {
+    return randomInt(min, max);
+  }
+
+  otp(length = 6) {
+    let otp = '';
+
+    for (let i = 0; i < length; i++) {
+      otp += this.randomInt(0, 9).toString();
+    }
+
+    return otp;
+  }
+
   sha256(data: string) {
     return createHash('sha256').update(data).digest();
   }