hotfix: 토큰 생성 로직 수정

Author: Jihyun3478

src/services/__test__/qr.service.test.ts

@@ -17,7 +17,7 @@ jest.mock('@/modules/slack/slack.notifier', () => ({
 
 jest.mock('@/repositories/user.repository');
 
-describe('UserService', () => {
+describe('UserService 의 QRService', () => {
   let service: UserService;
   let repo: jest.Mocked<UserRepository>;
 
@@ -42,7 +42,7 @@ describe('UserService', () => {
 
       expect(typeof token).toBe('string');
       expect(token.length).toBe(10);
-      expect(/^[A-Za-z0-9]{10}$/.test(token)).toBe(true);
+      expect(/^[A-Za-z0-9\-_.~!]{10}$/.test(token)).toBe(true);
       expect(repo.createQRLoginToken).toHaveBeenCalledWith(token, userId, ip, userAgent);
     });
 

src/utils/generateRandomToken.util.ts

@@ -1,11 +1,15 @@
 import crypto from 'crypto';
 
+const CHARSET = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_.~!';
+const CHARSET_LENGTH = CHARSET.length;
+
 export function generateRandomToken(length: number = 10): string {
-    const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
-    let result = '';
-    const randomBytes = crypto.randomBytes(length);
-    for (let i = 0; i < length; i++) {
-      result += chars.charAt(randomBytes[i] % chars.length);
-    }
-    return result;
-  }
+  const randomBytes = crypto.randomBytes(length);
+  const result = new Array(length);
+
+  for (let i = 0; i < length; i++) {
+    result[i] = CHARSET[randomBytes[i] % CHARSET_LENGTH];
+  }
+
+  return result.join('');
+}