# Security Checklist

## Frontend Security (✅ Implemented)

### Authentication & Authorization
- ✅ **Protected Routes**: All admin routes require authentication
- ✅ **Role-Based Access**: Checks for ADMIN role before granting access
- ✅ **Cookie Support**: `withCredentials: true` for httpOnly cookies
- ✅ **Token Refresh**: Automatic token refresh on 401 errors
- ✅ **Centralized Logout**: Calls backend to clear cookies
- ✅ **Secure Redirects**: Prevents redirect loops on login page
- ✅ **localStorage Fallback**: Works with backends without cookie support

### API Security
- ✅ **Separate API Instances**: Public vs authenticated endpoints
- ✅ **Bearer Token**: Proper Authorization header format
- ✅ **Error Handling**: Consistent error responses with user feedback
- ✅ **Request Retry**: Automatic retry after token refresh
- ✅ **CORS Credentials**: Enabled for cross-origin cookie sharing

### Code Security
- ✅ **TypeScript**: Type safety throughout the application
- ✅ **Input Validation**: Form validation on login
- ✅ **Error Messages**: Generic error messages (no sensitive info leak)
- ✅ **No Hardcoded Secrets**: Uses environment variables

## Backend Security (⚠️ Must Implement)

### Critical Requirements

#### 1. httpOnly Cookies (Recommended)
```javascript
// ⚠️ BACKEND MUST IMPLEMENT
res.cookie('access_token', token, {
  httpOnly: true,        // ✅ Prevents XSS attacks
  secure: true,          // ✅ HTTPS only (production)
  sameSite: 'strict',    // ✅ CSRF protection
  maxAge: 900000,        // ✅ 15 minutes
  path: '/'
})
```

**Why httpOnly?**
- Prevents JavaScript access to tokens
- Protects against XSS (Cross-Site Scripting) attacks
- Industry standard for authentication

#### 2. Token Management
- ⚠️ **Short-lived Access Tokens**: 15 minutes max
- ⚠️ **Long-lived Refresh Tokens**: 7 days max
- ⚠️ **Token Rotation**: Generate new refresh token on each refresh
- ⚠️ **Token Revocation**: Invalidate tokens on logout
- ⚠️ **Token Blacklist**: Store revoked tokens (Redis recommended)

#### 3. Password Security
- ⚠️ **Hashing**: Use bcrypt/argon2 (NOT MD5/SHA1)
- ⚠️ **Salt**: Unique salt per password
- ⚠️ **Cost Factor**: bcrypt rounds >= 12
- ⚠️ **Password Policy**: Min 8 chars, complexity requirements

```javascript
// ⚠️ BACKEND MUST IMPLEMENT
const bcrypt = require('bcrypt')
const saltRounds = 12
const hashedPassword = await bcrypt.hash(password, saltRounds)
```

#### 4. Rate Limiting
- ⚠️ **Login Endpoint**: 5 attempts per 15 minutes per IP
- ⚠️ **API Endpoints**: 100 requests per minute per user
- ⚠️ **Account Lockout**: Lock after 5 failed login attempts

```javascript
// ⚠️ BACKEND MUST IMPLEMENT
const rateLimit = require('express-rate-limit')

const loginLimiter = rateLimit({
  windowMs: 15 * 60 * 1000, // 15 minutes
  max: 5, // 5 requests per window
  message: 'Too many login attempts, please try again later'
})

app.post('/auth/login', loginLimiter, loginHandler)
```

#### 5. CORS Configuration
```javascript
// ⚠️ BACKEND MUST IMPLEMENT
app.use(cors({
  origin: process.env.FRONTEND_URL, // Specific origin, not '*'
  credentials: true,                 // Allow cookies
  methods: ['GET', 'POST', 'PUT', 'DELETE', 'PATCH'],
  allowedHeaders: ['Content-Type', 'Authorization']
}))
```

#### 6. Input Validation
- ⚠️ **Sanitize Inputs**: Prevent SQL injection, XSS
- ⚠️ **Validate Email**: Proper email format
- ⚠️ **Validate Types**: Check data types
- ⚠️ **Limit Payload Size**: Prevent DoS attacks

```javascript
// ⚠️ BACKEND MUST IMPLEMENT
const { body, validationResult } = require('express-validator')

app.post('/auth/login', [
  body('email').isEmail().normalizeEmail(),
  body('password').isLength({ min: 8 })
], (req, res) => {
  const errors = validationResult(req)
  if (!errors.isEmpty()) {
    return res.status(400).json({ errors: errors.array() })
  }
  // Process login
})
```

#### 7. SQL Injection Prevention
- ⚠️ **Parameterized Queries**: Use prepared statements
- ⚠️ **ORM**: Use Prisma, TypeORM, Sequelize
- ⚠️ **Never**: Concatenate user input into SQL

```javascript
// ❌ VULNERABLE
const query = `SELECT * FROM users WHERE email = '${email}'`

// ✅ SAFE
const query = 'SELECT * FROM users WHERE email = ?'
db.query(query, [email])
```

#### 8. XSS Prevention
- ⚠️ **Escape Output**: Sanitize data before rendering
- ⚠️ **Content Security Policy**: Set CSP headers
- ⚠️ **httpOnly Cookies**: Prevent JavaScript access to tokens

```javascript
// ⚠️ BACKEND MUST IMPLEMENT
const helmet = require('helmet')
app.use(helmet.contentSecurityPolicy({
  directives: {
    defaultSrc: ["'self'"],
    scriptSrc: ["'self'"],
    styleSrc: ["'self'", "'unsafe-inline'"],
    imgSrc: ["'self'", "data:", "https:"],
  }
}))
```

#### 9. HTTPS/TLS
- ⚠️ **Production**: HTTPS only (no HTTP)
- ⚠️ **TLS 1.2+**: Disable older versions
- ⚠️ **HSTS Header**: Force HTTPS

```javascript
// ⚠️ BACKEND MUST IMPLEMENT
app.use(helmet.hsts({
  maxAge: 31536000, // 1 year
  includeSubDomains: true,
  preload: true
}))
```

#### 10. Security Headers
```javascript
// ⚠️ BACKEND MUST IMPLEMENT
const helmet = require('helmet')
app.use(helmet()) // Sets multiple security headers

// Or manually:
app.use((req, res, next) => {
  res.setHeader('X-Content-Type-Options', 'nosniff')
  res.setHeader('X-Frame-Options', 'DENY')
  res.setHeader('X-XSS-Protection', '1; mode=block')
  res.setHeader('Strict-Transport-Security', 'max-age=31536000')
  next()
})
```

#### 11. Audit Logging
- ⚠️ **Log All Admin Actions**: Who, what, when, where
- ⚠️ **Log Failed Logins**: Track suspicious activity
- ⚠️ **Log Sensitive Operations**: User deletion, role changes
- ⚠️ **Secure Logs**: Store in separate database/service

```javascript
// ⚠️ BACKEND MUST IMPLEMENT
const auditLog = async (userId, action, resource, details) => {
  await db.auditLogs.create({
    userId,
    action,
    resource,
    details,
    ipAddress: req.ip,
    userAgent: req.headers['user-agent'],
    timestamp: new Date()
  })
}
```

#### 12. Database Security
- ⚠️ **Least Privilege**: Database user with minimal permissions
- ⚠️ **Encrypted Connections**: Use SSL/TLS for database
- ⚠️ **Backup Encryption**: Encrypt database backups
- ⚠️ **Sensitive Data**: Encrypt PII at rest

#### 13. Environment Variables
- ⚠️ **Never Commit**: .env files in .gitignore
- ⚠️ **Secrets Management**: Use vault (AWS Secrets Manager, etc.)
- ⚠️ **Rotate Secrets**: Regular rotation of API keys, tokens

```bash
# ⚠️ BACKEND MUST CONFIGURE
JWT_SECRET=<strong-random-secret-256-bits>
JWT_REFRESH_SECRET=<different-strong-secret>
DATABASE_URL=<encrypted-connection-string>
FRONTEND_URL=https://admin.yourdomain.com
NODE_ENV=production
```

#### 14. Session Management
- ⚠️ **Session Timeout**: Auto-logout after inactivity
- ⚠️ **Concurrent Sessions**: Limit or track multiple sessions
- ⚠️ **Session Invalidation**: Clear on logout, password change

## Additional Security Measures

### Frontend (Optional Improvements)

#### 1. Content Security Policy (CSP)
```html
<!-- Add to index.html -->
<meta http-equiv="Content-Security-Policy" 
      content="default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'">
```

#### 2. Subresource Integrity (SRI)
```html
<!-- For CDN resources -->
<script src="https://cdn.example.com/lib.js" 
        integrity="sha384-..." 
        crossorigin="anonymous"></script>
```

#### 3. Input Sanitization
```typescript
// Install DOMPurify
import DOMPurify from 'dompurify'

const sanitizedInput = DOMPurify.sanitize(userInput)
```

#### 4. Two-Factor Authentication (2FA)
- Add TOTP support (Google Authenticator)
- SMS verification
- Backup codes

#### 5. Password Strength Meter
```typescript
// Install zxcvbn
import zxcvbn from 'zxcvbn'

const strength = zxcvbn(password)
// Show strength indicator to user
```

### Backend (Additional)

#### 1. API Versioning
```javascript
app.use('/api/v1', v1Routes)
app.use('/api/v2', v2Routes)
```

#### 2. Request Signing
- Sign requests with HMAC
- Verify signature on backend
- Prevents request tampering

#### 3. IP Whitelisting (Admin Panel)
```javascript
const adminIpWhitelist = ['192.168.1.1', '10.0.0.1']

const ipWhitelistMiddleware = (req, res, next) => {
  if (!adminIpWhitelist.includes(req.ip)) {
    return res.status(403).json({ message: 'Access denied' })
  }
  next()
}

app.use('/admin', ipWhitelistMiddleware)
```

#### 4. Geo-blocking
- Block requests from certain countries
- Use CloudFlare or similar service

#### 5. DDoS Protection
- Use CloudFlare, AWS Shield
- Rate limiting at infrastructure level
- CDN for static assets

## Security Testing

### Automated Testing
- ⚠️ **OWASP ZAP**: Automated security scanning
- ⚠️ **npm audit**: Check for vulnerable dependencies
- ⚠️ **Snyk**: Continuous security monitoring
- ⚠️ **SonarQube**: Code quality and security

```bash
# Run security audit
npm audit
npm audit fix

# Check for outdated packages
npm outdated
```

### Manual Testing
- ⚠️ **Penetration Testing**: Hire security experts
- ⚠️ **Code Review**: Security-focused code reviews
- ⚠️ **Vulnerability Scanning**: Regular scans

## Compliance

### GDPR (EU)
- ⚠️ **Data Minimization**: Collect only necessary data
- ⚠️ **Right to Erasure**: Allow users to delete their data
- ⚠️ **Data Portability**: Export user data
- ⚠️ **Consent**: Explicit consent for data processing
- ⚠️ **Privacy Policy**: Clear privacy policy

### HIPAA (Healthcare - US)
- ⚠️ **Encryption**: Encrypt PHI at rest and in transit
- ⚠️ **Access Controls**: Role-based access
- ⚠️ **Audit Logs**: Track all PHI access
- ⚠️ **Business Associate Agreement**: With third parties

### PCI DSS (Payment Cards)
- ⚠️ **Never Store**: CVV, full card numbers
- ⚠️ **Tokenization**: Use payment gateway tokens
- ⚠️ **Encryption**: Encrypt cardholder data

## Monitoring & Alerting

### What to Monitor
- ⚠️ **Failed Login Attempts**: Alert on threshold
- ⚠️ **Unusual Activity**: Large data exports, bulk deletions
- ⚠️ **API Errors**: Spike in 401/403/500 errors
- ⚠️ **Performance**: Slow queries, high CPU
- ⚠️ **Security Events**: Unauthorized access attempts

### Tools
- **Sentry**: Error tracking
- **DataDog**: Application monitoring
- **CloudWatch**: AWS monitoring
- **Prometheus + Grafana**: Metrics and dashboards

## Incident Response Plan

### Steps
1. **Detect**: Identify security incident
2. **Contain**: Isolate affected systems
3. **Investigate**: Determine scope and impact
4. **Remediate**: Fix vulnerability
5. **Recover**: Restore normal operations
6. **Review**: Post-incident analysis

### Contacts
- Security team email
- On-call engineer
- Legal team (for data breaches)
- PR team (for public disclosure)

## Summary

### Current Status
✅ **Frontend**: Implements industry-standard security patterns
⚠️ **Backend**: Must implement security measures listed above

### Priority Actions (Backend)
1. 🔴 **Critical**: Implement httpOnly cookies
2. 🔴 **Critical**: Hash passwords with bcrypt
3. 🔴 **Critical**: Add rate limiting
4. 🔴 **Critical**: Enable HTTPS in production
5. 🟡 **High**: Implement token refresh
6. 🟡 **High**: Add input validation
7. 🟡 **High**: Configure CORS properly
8. 🟡 **High**: Add security headers
9. 🟢 **Medium**: Implement audit logging
10. 🟢 **Medium**: Add 2FA support

### Security Score
- **Frontend**: 9/10 ✅
- **Backend**: Depends on implementation ⚠️
- **Overall**: Requires backend security implementation

### Next Steps
1. Review this checklist with backend team
2. Implement critical security measures
3. Conduct security audit
4. Set up monitoring and alerting
5. Create incident response plan
6. Regular security reviews and updates