# Security API Implementation Summary

## Overview
Successfully implemented comprehensive security monitoring APIs for tracking failed login attempts and password changes. This provides the Security Overview feature with real-time security analytics.

## What Was Created

### 1. Database Tables

#### `failed_login_attempts`
Tracks all failed login attempts with the following information:
- Login ID attempted
- IP address
- User agent (browser/client)
- Timestamp of attempt
- Reason for failure (invalid password, user not found, account deactivated)

#### `password_change_history`
Tracks all password changes with the following information:
- User who changed the password
- Who performed the change (self or admin)
- IP address
- User agent
- Timestamp of change
- Type of change (self, admin_reset, forced)

### 2. Backend Files Created/Modified

#### Created Files:
1. **`backend/src/controllers/securityController.js`**
   - `getFailedLogins()` - Get failed login attempts within specified hours
   - `getPasswordChanges()` - Get password changes within specified days
   - `getSecurityOverview()` - Get comprehensive security overview
   - Helper methods for logging security events

2. **`backend/src/routes/security.js`**
   - Three protected routes for security data access

3. **`backend/database/create_security_tables.sql`**
   - SQL script to create security tables manually

4. **`backend/setup_security_tables.js`**
   - Node.js script to automatically create tables

5. **`backend/SECURITY_API_DOCUMENTATION.md`**
   - Complete API documentation with examples

#### Modified Files:
1. **`backend/src/controllers/authController.js`**
   - Added failed login tracking to `login()` method
   - Added password change tracking to `changePassword()` method
   - Tracks IP address and user agent for all security events

2. **`backend/src/server.js`**
   - Registered `/api/security` routes

## API Endpoints

### 1. Failed Logins (24h default)
```
GET /api/security/failed-logins?hours=24
```

**Response:**
```json
{
  "status": "success",
  "data": {
    "attempts": [...],
    "summary": {
      "total_attempts": 45,
      "unique_users": 12,
      "unique_ips": 8
    },
    "period_hours": 24
  }
}
```

### 2. Password Changes (7d default)
```
GET /api/security/password-changes?days=7
```

**Response:**
```json
{
  "status": "success",
  "data": {
    "changes": [...],
    "summary": {
      "total_changes": 23,
      "unique_users": 18,
      "self_changes": 20,
      "admin_resets": 3
    },
    "period_days": 7
  }
}
```

### 3. Security Overview
```
GET /api/security/overview
```

**Response:**
```json
{
  "status": "success",
  "data": {
    "failed_logins_24h": {...},
    "password_changes_7d": {...},
    "recent_events": [...]
  }
}
```

## Features

### 1. Automatic Security Logging
- **Failed Login Attempts**: Automatically logged when:
  - User provides invalid login ID
  - User provides incorrect password
  - User account is deactivated

- **Password Changes**: Automatically logged when:
  - User successfully changes password
  - Admin resets a user's password
  - Forced password change occurs

### 2. Role-Based Access Control
- **Regular Users**: Can only view their own security events
- **Admins/Super_admins**: Can view all security events in their organization
- Organization-level data isolation maintained

### 3. Flexible Time Ranges
- **Failed Logins**: 1-720 hours (up to 30 days)
- **Password Changes**: 1-365 days (up to 1 year)

### 4. Comprehensive Data
Each security event includes:
- User information (name, email, login_id)
- Network information (IP address, user agent)
- Contextual details (reason for failure, change type)
- Timestamps for all events

### 5. Performance Optimized
- Indexed columns for fast queries
- Query result limits (1000 for admins, 100 for users)
- Efficient JOIN operations
- Proper database schema with foreign keys

## Setup Instructions

### Quick Setup (Recommended)

1. **Run the setup script:**
   ```bash
   cd backend
   node setup_security_tables.js
   ```

2. **Restart the backend server:**
   ```bash
   npm start
   ```

3. **Test the endpoints:**
   ```bash
   # Login to get a token
   curl -X POST http://localhost:3000/api/auth/login \
     -H "Content-Type: application/json" \
     -d '{"login_id":"your_login_id","password":"your_password"}'
   
   # Get failed logins
   curl -X GET http://localhost:3000/api/security/failed-logins \
     -H "Authorization: Bearer YOUR_TOKEN"
   ```

### Manual Setup

1. **Execute SQL script:**
   ```bash
   mysql -u root -p cms_db < backend/database/create_security_tables.sql
   ```

2. **Restart server and test** (same as above)

## Security Tracking Flow

### Failed Login Tracking

```
User Login Attempt
     ↓
AuthController.login()
     ↓
Validation Checks
     ↓
[If Failed] → SecurityController.logFailedLoginAttempt()
     ↓
Insert into failed_login_attempts table
     ↓
Return error response to user
```

### Password Change Tracking

```
User Change Password Request
     ↓
AuthController.changePassword()
     ↓
Validation & Password Update
     ↓
[If Success] → SecurityController.logPasswordChange()
     ↓
Insert into password_change_history table
     ↓
Return success response to user
```

## Database Schema

### failed_login_attempts
| Column | Type | Description |
|--------|------|-------------|
| id | int(11) | Primary key |
| login_id | varchar(100) | Login ID attempted |
| ip_address | varchar(45) | IP address of attempt |
| user_agent | text | Browser/client info |
| attempted_at | timestamp | When attempt occurred |
| reason | varchar(255) | Reason for failure |

**Indexes:**
- `idx_login_id` - Fast lookup by login ID
- `idx_attempted_at` - Fast time-based queries
- `idx_ip_address` - Fast IP-based queries

### password_change_history
| Column | Type | Description |
|--------|------|-------------|
| id | int(11) | Primary key |
| user_id | int(11) | User whose password changed |
| changed_by | int(11) | Who changed the password |
| ip_address | varchar(45) | IP address of change |
| user_agent | text | Browser/client info |
| changed_at | timestamp | When change occurred |
| change_type | enum | Type: self, admin_reset, forced |

**Indexes:**
- `idx_user_id` - Fast lookup by user
- `idx_changed_by` - Fast lookup by admin
- `idx_changed_at` - Fast time-based queries

**Foreign Keys:**
- `user_id` → `users(id)` ON DELETE CASCADE
- `changed_by` → `users(id)` ON DELETE CASCADE

## Usage Examples

### Get Failed Logins (Last 24 Hours)
```javascript
const response = await fetch('/api/security/failed-logins?hours=24', {
  headers: {
    'Authorization': `Bearer ${token}`
  }
});
const data = await response.json();
console.log(`Total failed logins: ${data.data.summary.total_attempts}`);
```

### Get Password Changes (Last 7 Days)
```javascript
const response = await fetch('/api/security/password-changes?days=7', {
  headers: {
    'Authorization': `Bearer ${token}`
  }
});
const data = await response.json();
console.log(`Total password changes: ${data.data.summary.total_changes}`);
```

### Get Security Overview
```javascript
const response = await fetch('/api/security/overview', {
  headers: {
    'Authorization': `Bearer ${token}`
  }
});
const data = await response.json();
console.log('Security Overview:', data.data);
```

## Integration Points

### For Frontend Dashboard

The Security Overview component can use these endpoints to display:

1. **Security Metrics Card:**
   - Failed login attempts in last 24h
   - Password changes in last 7d
   - Unique users affected
   - Unique IP addresses involved

2. **Recent Security Events:**
   - Combined timeline of failed logins and password changes
   - User information for each event
   - Event type and timestamp
   - IP address and user agent

3. **Detailed Views:**
   - Drill down into failed login attempts
   - View password change history
   - Filter by time range
   - Export to CSV/PDF (future enhancement)

### Example Dashboard Integration

```typescript
// In your Dashboard component
const [securityOverview, setSecurityOverview] = useState(null);

useEffect(() => {
  const fetchSecurityData = async () => {
    const response = await apiRequest('/security/overview');
    if (response.status === 'success') {
      setSecurityOverview(response.data);
    }
  };
  
  fetchSecurityData();
}, []);

// Display in UI
<SecurityMetrics 
  failedLogins={securityOverview?.failed_logins_24h}
  passwordChanges={securityOverview?.password_changes_7d}
/>
<RecentSecurityEvents events={securityOverview?.recent_events} />
```

## Error Handling

All endpoints handle errors gracefully:

- **Invalid Parameters**: Returns 400 with descriptive message
- **Authentication Errors**: Returns 401 if token missing/invalid
- **Database Errors**: Returns 500 with error logged to console
- **Logging Failures**: Non-blocking - won't break auth flow

## Performance Considerations

1. **Indexed Queries**: All time-based queries use indexed columns
2. **Result Limits**: Prevents excessive data transfer
3. **Async Logging**: Security logging doesn't block auth flow
4. **Connection Pooling**: Uses database connection pool efficiently

## Future Enhancements

Consider implementing:

1. **Rate Limiting**: Lock account after N failed attempts
2. **Real-time Alerts**: Email/SMS for suspicious activity
3. **Geolocation**: Track login locations on map
4. **Export Feature**: Download security reports
5. **Advanced Analytics**: Charts and trends
6. **Two-Factor Auth**: Enhanced security layer
7. **Session Management**: Active session tracking
8. **Anomaly Detection**: ML-based suspicious activity detection

## Testing

### Test Failed Login Tracking

1. Try to login with wrong password
2. Check failed_login_attempts table:
   ```sql
   SELECT * FROM failed_login_attempts ORDER BY attempted_at DESC LIMIT 10;
   ```
3. Call API endpoint to verify data appears

### Test Password Change Tracking

1. Change your password successfully
2. Check password_change_history table:
   ```sql
   SELECT * FROM password_change_history ORDER BY changed_at DESC LIMIT 10;
   ```
3. Call API endpoint to verify data appears

## Troubleshooting

### Tables Not Created
- Run `node setup_security_tables.js`
- Check database connection in config
- Verify database user has CREATE TABLE permission

### Data Not Appearing
- Check that authController has SecurityController imported
- Verify logging methods are called in login/changePassword
- Check database connection

### API Returns Empty Data
- Ensure tables are created
- Verify time range parameters are correct
- Check that security events have been logged

## Support

For detailed API documentation, see: `SECURITY_API_DOCUMENTATION.md`

For questions or issues, contact the development team.