init

backend/apps/authentication/admin.py

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+from django.contrib import admin
+
+# Register your models here.

backend/apps/authentication/apps.py

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+from django.apps import AppConfig
+
+
+class AuthenticationConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'apps.authentication'

backend/apps/authentication/models.py

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+from django.db import models
+
+# Create your models here.

backend/apps/authentication/tests.py

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+from django.test import TestCase
+
+# Create your tests here.

backend/apps/authentication/urls.py

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+# authentication/urls.py - Authentication URL patterns
+from django.urls import path
+from . import views
+
+app_name = 'authentication'
+
+urlpatterns = [
+    path('login/', views.login_view, name='login'),
+    path('logout/', views.logout_view, name='logout'),
+    path('check/', views.check_auth_view, name='check'),
+]

backend/apps/authentication/views.py

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+# authentication/views.py - Authentication API views
+import hashlib
+from django.contrib.auth import login, logout
+from django.contrib.auth.models import User
+from django.contrib.sessions.models import Session
+from django.views.decorators.csrf import csrf_exempt
+from django.utils.decorators import method_decorator
+from django.utils import timezone
+from datetime import timedelta
+from rest_framework import status
+from rest_framework.decorators import api_view, permission_classes
+from rest_framework.permissions import AllowAny
+from rest_framework.response import Response
+from django_ratelimit.decorators import ratelimit
+from apps.core.models import SystemSettings
+import logging
+
+logger = logging.getLogger(__name__)
+
+
+def get_client_ip(request):
+    """Extract client IP address from request"""
+    x_forwarded_for = request.META.get('HTTP_X_FORWARDED_FOR')
+    if x_forwarded_for:
+        ip = x_forwarded_for.split(',')[0].strip()
+    else:
+        ip = request.META.get('REMOTE_ADDR')
+    return ip
+
+
+@api_view(['POST'])
+@permission_classes([AllowAny])
+@csrf_exempt
+@ratelimit(key='ip', rate='10/min', method='POST', block=True)
+def login_view(request):
+    """
+    Authenticate user with system password.
+    Rate limited to prevent brute force attacks.
+    """
+    try:
+        password = request.data.get('password')
+
+        if not password:
+            return Response(
+                {'error': 'Password is required'},
+                status=status.HTTP_400_BAD_REQUEST
+            )
+
+        settings_obj = SystemSettings.get_settings()
+
+        if settings_obj.check_password(password):
+            # Create or get session
+            if not request.session.session_key:
+                request.session.create()
+
+            # Store authentication in session
+            request.session['authenticated'] = True
+            request.session['auth_timestamp'] = timezone.now().isoformat()
+            request.session['client_ip'] = get_client_ip(request)
+            request.session.save()
+
+            logger.info(f"Successful login from IP: {get_client_ip(request)}")
+
+            return Response({
+                'success': True,
+                'message': 'Authentication successful',
+                'session_key': request.session.session_key
+            })
+        else:
+            logger.warning(f"Failed login attempt from IP: {get_client_ip(request)}")
+            return Response(
+                {'error': 'Invalid password'},
+                status=status.HTTP_401_UNAUTHORIZED
+            )
+
+    except Exception as e:
+        logger.error(f"Login failed: {e}")
+        return Response(
+            {'error': 'Authentication failed'},
+            status=status.HTTP_500_INTERNAL_SERVER_ERROR
+        )
+
+
+@api_view(['POST'])
+@permission_classes([AllowAny])
+@csrf_exempt
+def logout_view(request):
+    """Clear user session and log out"""
+    try:
+        request.session.flush()
+        logger.info("User logged out successfully")
+        return Response({
+            'success': True,
+            'message': 'Logged out successfully'
+        })
+    except Exception as e:
+        logger.error(f"Logout failed: {e}")
+        return Response(
+            {'error': 'Logout failed'},
+            status=status.HTTP_500_INTERNAL_SERVER_ERROR
+        )
+
+
+@api_view(['GET'])
+@permission_classes([AllowAny])
+@csrf_exempt
+def check_auth_view(request):
+    """Check if user is authenticated"""
+    is_authenticated = request.session.get('authenticated', False)
+
+    if is_authenticated:
+        # Optional: Check session age for additional security
+        auth_timestamp = request.session.get('auth_timestamp')
+        if auth_timestamp:
+            try:
+                auth_time = timezone.datetime.fromisoformat(auth_timestamp)
+                if timezone.now() - auth_time > timedelta(hours=24):
+                    request.session.flush()
+                    is_authenticated = False
+            except (ValueError, TypeError):
+                request.session.flush()
+                is_authenticated = False
+
+    return Response({
+        'authenticated': is_authenticated,
+        'session_key': request.session.session_key if is_authenticated else None
+    })