updates

Backend/alembic/versions/08e2f866e131_add_mfa_fields_to_users.py

@@ -0,0 +1,31 @@
+"""add_mfa_fields_to_users
+
+Revision ID: 08e2f866e131
+Revises: add_badges_to_page_content
+Create Date: 2025-11-19 11:13:30.376194
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '08e2f866e131'
+down_revision = 'add_badges_to_page_content'
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # Add MFA fields to users table
+    op.add_column('users', sa.Column('mfa_enabled', sa.Boolean(), nullable=False, server_default='0'))
+    op.add_column('users', sa.Column('mfa_secret', sa.String(255), nullable=True))
+    op.add_column('users', sa.Column('mfa_backup_codes', sa.Text(), nullable=True))
+
+
+def downgrade() -> None:
+    # Remove MFA fields from users table
+    op.drop_column('users', 'mfa_backup_codes')
+    op.drop_column('users', 'mfa_secret')
+    op.drop_column('users', 'mfa_enabled')
+

Backend/alembic/versions/d9aff6c5f0d4_add_paypal_payment_method.py

@@ -0,0 +1,51 @@
+"""add_paypal_payment_method
+
+Revision ID: d9aff6c5f0d4
+Revises: 08e2f866e131
+Create Date: 2025-11-19 12:07:50.703320
+
+"""
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import mysql
+
+
+# revision identifiers, used by Alembic.
+revision = 'd9aff6c5f0d4'
+down_revision = '08e2f866e131'
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # Note: MySQL ENUM modifications can be tricky.
+    # If payments table already has data with existing enum values,
+    # we need to preserve them when adding 'paypal'
+    
+    # For MySQL, we need to alter the ENUM column to include the new value
+    # Check if we're using MySQL
+    bind = op.get_bind()
+    if bind.dialect.name == 'mysql':
+        # Alter the ENUM column to include 'paypal'
+        # This preserves existing values and adds 'paypal'
+        op.execute(
+            "ALTER TABLE payments MODIFY COLUMN payment_method ENUM('cash', 'credit_card', 'debit_card', 'bank_transfer', 'e_wallet', 'stripe', 'paypal') NOT NULL"
+        )
+    else:
+        # For other databases (PostgreSQL, SQLite), enum changes are handled differently
+        # For SQLite, this might not be needed as it doesn't enforce enum constraints
+        pass
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # Remove 'paypal' from the ENUM (be careful if there are existing paypal payments)
+    bind = op.get_bind()
+    if bind.dialect.name == 'mysql':
+        # First, check if there are any paypal payments - if so, this will fail
+        # In production, you'd want to migrate existing paypal payments first
+        op.execute(
+            "ALTER TABLE payments MODIFY COLUMN payment_method ENUM('cash', 'credit_card', 'debit_card', 'bank_transfer', 'e_wallet', 'stripe') NOT NULL"
+        )
+    # ### end Alembic commands ###
+

Backend/requirements.txt

@@ -3,7 +3,7 @@ uvicorn[standard]==0.24.0
 python-dotenv==1.0.0
 sqlalchemy==2.0.23
 pymysql==1.1.0
-cryptography==41.0.7
+cryptography>=41.0.7
 python-jose[cryptography]==3.3.0
 bcrypt==4.1.2
 python-multipart==0.0.6
@@ -17,6 +17,9 @@ aiosmtplib==3.0.1
 jinja2==3.1.2
 alembic==1.12.1
 stripe>=13.2.0
+paypal-checkout-serversdk>=1.0.3
+pyotp==2.9.0
+qrcode[pil]==7.4.2
 
 # Enterprise features (optional but recommended)
 # redis==5.0.1  # Uncomment if using Redis caching

Backend/src/config/settings.py

@@ -96,6 +96,11 @@ class Settings(BaseSettings):
     STRIPE_PUBLISHABLE_KEY: str = Field(default="", description="Stripe publishable key")
     STRIPE_WEBHOOK_SECRET: str = Field(default="", description="Stripe webhook secret")
     
+    # PayPal Payment Gateway
+    PAYPAL_CLIENT_ID: str = Field(default="", description="PayPal client ID")
+    PAYPAL_CLIENT_SECRET: str = Field(default="", description="PayPal client secret")
+    PAYPAL_MODE: str = Field(default="sandbox", description="PayPal mode: sandbox or live")
+    
     @property
     def database_url(self) -> str:
         """Construct database URL"""

Backend/src/models/payment.py

@@ -12,6 +12,7 @@ class PaymentMethod(str, enum.Enum):
     bank_transfer = "bank_transfer"
     e_wallet = "e_wallet"
     stripe = "stripe"
+    paypal = "paypal"
 
 
 class PaymentType(str, enum.Enum):

Backend/src/models/user.py

@@ -17,6 +17,9 @@ class User(Base):
     avatar = Column(String(255), nullable=True)
     currency = Column(String(3), nullable=False, default='VND')  # ISO 4217 currency code
     is_active = Column(Boolean, nullable=False, default=True)
+    mfa_enabled = Column(Boolean, nullable=False, default=False)
+    mfa_secret = Column(String(255), nullable=True)  # TOTP secret key (encrypted in production)
+    mfa_backup_codes = Column(Text, nullable=True)  # JSON array of backup codes (hashed)
     created_at = Column(DateTime, default=datetime.utcnow, nullable=False)
     updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow, nullable=False)
 

Backend/src/routes/auth_routes.py

@@ -1,6 +1,10 @@
-from fastapi import APIRouter, Depends, HTTPException, status, Cookie, Response
+from fastapi import APIRouter, Depends, HTTPException, status, Cookie, Response, Request, UploadFile, File
 from fastapi.responses import JSONResponse
 from sqlalchemy.orm import Session
+from pathlib import Path
+import aiofiles
+import uuid
+import os
 
 from ..config.database import get_db
 from ..services.auth_service import auth_service
@@ -12,7 +16,11 @@ from ..schemas.auth import (
     ResetPasswordRequest,
     AuthResponse,
     TokenResponse,
-    MessageResponse
+    MessageResponse,
+    MFAInitResponse,
+    EnableMFARequest,
+    VerifyMFARequest,
+    MFAStatusResponse
 )
 from ..middleware.auth import get_current_user
 from ..models.user import User
@@ -20,6 +28,22 @@ from ..models.user import User
 router = APIRouter(prefix="/auth", tags=["auth"])
 
 
+def get_base_url(request: Request) -> str:
+    """Get base URL for image normalization"""
+    return os.getenv("SERVER_URL") or f"http://{request.headers.get('host', 'localhost:8000')}"
+
+
+def normalize_image_url(image_url: str, base_url: str) -> str:
+    """Normalize image URL to absolute URL"""
+    if not image_url:
+        return image_url
+    if image_url.startswith('http://') or image_url.startswith('https://'):
+        return image_url
+    if image_url.startswith('/'):
+        return f"{base_url}{image_url}"
+    return f"{base_url}/{image_url}"
+
+
 @router.post("/register", status_code=status.HTTP_201_CREATED)
 async def register(
     request: RegisterRequest,
@@ -79,9 +103,18 @@ async def login(
             db=db,
             email=request.email,
             password=request.password,
-            remember_me=request.rememberMe or False
+            remember_me=request.rememberMe or False,
+            mfa_token=request.mfaToken
         )
 
+        # Check if MFA is required
+        if result.get("requires_mfa"):
+            return {
+                "status": "success",
+                "requires_mfa": True,
+                "user_id": result["user_id"]
+            }
+
         # Set refresh token as HttpOnly cookie
         max_age = 7 * 24 * 60 * 60 if request.rememberMe else 1 * 24 * 60 * 60
         response.set_cookie(
@@ -104,7 +137,7 @@ async def login(
         }
     except ValueError as e:
         error_message = str(e)
-        status_code = status.HTTP_401_UNAUTHORIZED if "Invalid email or password" in error_message else status.HTTP_400_BAD_REQUEST
+        status_code = status.HTTP_401_UNAUTHORIZED if "Invalid email or password" in error_message or "Invalid MFA token" in error_message else status.HTTP_400_BAD_REQUEST
         return JSONResponse(
             status_code=status_code,
             content={
@@ -260,3 +293,229 @@ async def reset_password(
             detail=str(e)
         )
 
+
+# MFA Routes
+from ..services.mfa_service import mfa_service
+from ..config.settings import settings
+
+
+@router.get("/mfa/init")
+async def init_mfa(
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db)
+):
+    """Initialize MFA setup - generate secret and QR code"""
+    try:
+        if current_user.mfa_enabled:
+            raise HTTPException(
+                status_code=status.HTTP_400_BAD_REQUEST,
+                detail="MFA is already enabled"
+            )
+
+        secret = mfa_service.generate_secret()
+        app_name = getattr(settings, 'APP_NAME', 'Hotel Booking')
+        qr_code = mfa_service.generate_qr_code(secret, current_user.email, app_name)
+
+        return {
+            "status": "success",
+            "data": {
+                "secret": secret,
+                "qr_code": qr_code
+            }
+        }
+    except HTTPException:
+        raise
+    except Exception as e:
+        raise HTTPException(
+            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+            detail=f"Error initializing MFA: {str(e)}"
+        )
+
+
+@router.post("/mfa/enable")
+async def enable_mfa(
+    request: EnableMFARequest,
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db)
+):
+    """Enable MFA after verifying token"""
+    try:
+        success, backup_codes = mfa_service.enable_mfa(
+            db=db,
+            user_id=current_user.id,
+            secret=request.secret,
+            verification_token=request.verification_token
+        )
+
+        return {
+            "status": "success",
+            "message": "MFA enabled successfully",
+            "data": {
+                "backup_codes": backup_codes
+            }
+        }
+    except ValueError as e:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail=str(e)
+        )
+    except Exception as e:
+        raise HTTPException(
+            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+            detail=f"Error enabling MFA: {str(e)}"
+        )
+
+
+@router.post("/mfa/disable")
+async def disable_mfa(
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db)
+):
+    """Disable MFA"""
+    try:
+        mfa_service.disable_mfa(db=db, user_id=current_user.id)
+        return {
+            "status": "success",
+            "message": "MFA disabled successfully"
+        }
+    except ValueError as e:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail=str(e)
+        )
+    except Exception as e:
+        raise HTTPException(
+            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+            detail=f"Error disabling MFA: {str(e)}"
+        )
+
+
+@router.get("/mfa/status", response_model=MFAStatusResponse)
+async def get_mfa_status(
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db)
+):
+    """Get MFA status for current user"""
+    try:
+        status_data = mfa_service.get_mfa_status(db=db, user_id=current_user.id)
+        return status_data
+    except ValueError as e:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail=str(e)
+        )
+    except Exception as e:
+        raise HTTPException(
+            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+            detail=f"Error getting MFA status: {str(e)}"
+        )
+
+
+@router.post("/mfa/regenerate-backup-codes")
+async def regenerate_backup_codes(
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db)
+):
+    """Regenerate backup codes for MFA"""
+    try:
+        backup_codes = mfa_service.regenerate_backup_codes(db=db, user_id=current_user.id)
+        return {
+            "status": "success",
+            "message": "Backup codes regenerated successfully",
+            "data": {
+                "backup_codes": backup_codes
+            }
+        }
+    except ValueError as e:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail=str(e)
+        )
+    except Exception as e:
+        raise HTTPException(
+            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+            detail=f"Error regenerating backup codes: {str(e)}"
+        )
+
+
+@router.post("/avatar/upload")
+async def upload_avatar(
+    request: Request,
+    image: UploadFile = File(...),
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db)
+):
+    """Upload user avatar"""
+    try:
+        # Validate file type
+        if not image.content_type or not image.content_type.startswith('image/'):
+            raise HTTPException(
+                status_code=status.HTTP_400_BAD_REQUEST,
+                detail="File must be an image"
+            )
+        
+        # Validate file size (max 2MB)
+        content = await image.read()
+        if len(content) > 2 * 1024 * 1024:  # 2MB
+            raise HTTPException(
+                status_code=status.HTTP_400_BAD_REQUEST,
+                detail="Avatar file size must be less than 2MB"
+            )
+        
+        # Create uploads directory
+        upload_dir = Path(__file__).parent.parent.parent / "uploads" / "avatars"
+        upload_dir.mkdir(parents=True, exist_ok=True)
+        
+        # Delete old avatar if exists
+        if current_user.avatar:
+            old_avatar_path = Path(__file__).parent.parent.parent / current_user.avatar.lstrip('/')
+            if old_avatar_path.exists() and old_avatar_path.is_file():
+                try:
+                    old_avatar_path.unlink()
+                except Exception:
+                    pass  # Ignore deletion errors
+        
+        # Generate filename
+        ext = Path(image.filename).suffix or '.png'
+        filename = f"avatar-{current_user.id}-{uuid.uuid4()}{ext}"
+        file_path = upload_dir / filename
+        
+        # Save file
+        async with aiofiles.open(file_path, 'wb') as f:
+            await f.write(content)
+        
+        # Update user avatar
+        image_url = f"/uploads/avatars/{filename}"
+        current_user.avatar = image_url
+        db.commit()
+        db.refresh(current_user)
+        
+        # Return the image URL
+        base_url = get_base_url(request)
+        full_url = normalize_image_url(image_url, base_url)
+        
+        return {
+            "status": "success",
+            "message": "Avatar uploaded successfully",
+            "data": {
+                "avatar_url": image_url,
+                "full_url": full_url,
+                "user": {
+                    "id": current_user.id,
+                    "name": current_user.full_name,
+                    "email": current_user.email,
+                    "phone": current_user.phone,
+                    "avatar": image_url,
+                    "role": current_user.role.name if current_user.role else "customer"
+                }
+            }
+        }
+    except HTTPException:
+        raise
+    except Exception as e:
+        db.rollback()
+        raise HTTPException(
+            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+            detail=f"Error uploading avatar: {str(e)}"
+        )
+

Backend/src/routes/booking_routes.py

@@ -202,6 +202,16 @@ async def create_booking(
 ):
     """Create new booking"""
     try:
+        import logging
+        logger = logging.getLogger(__name__)
+        
+        # Validate that booking_data is a dict
+        if not isinstance(booking_data, dict):
+            logger.error(f"Invalid booking_data type: {type(booking_data)}, value: {booking_data}")
+            raise HTTPException(status_code=400, detail="Invalid request body. Expected JSON object.")
+        
+        logger.info(f"Received booking request from user {current_user.id}: {booking_data}")
+        
         room_id = booking_data.get("room_id")
         check_in_date = booking_data.get("check_in_date")
         check_out_date = booking_data.get("check_out_date")
@@ -210,8 +220,21 @@ async def create_booking(
         notes = booking_data.get("notes")
         payment_method = booking_data.get("payment_method", "cash")
         
-        if not all([room_id, check_in_date, check_out_date, total_price]):
-            raise HTTPException(status_code=400, detail="Missing required booking fields")
+        # Detailed validation with specific error messages
+        missing_fields = []
+        if not room_id:
+            missing_fields.append("room_id")
+        if not check_in_date:
+            missing_fields.append("check_in_date")
+        if not check_out_date:
+            missing_fields.append("check_out_date")
+        if total_price is None:
+            missing_fields.append("total_price")
+        
+        if missing_fields:
+            error_msg = f"Missing required booking fields: {', '.join(missing_fields)}"
+            logger.error(error_msg)
+            raise HTTPException(status_code=400, detail=error_msg)
         
         # Check if room exists
         room = db.query(Room).filter(Room.id == room_id).first()
@@ -250,15 +273,15 @@ async def create_booking(
         booking_number = generate_booking_number()
         
         # Determine if deposit is required
-        # Cash requires deposit, Stripe doesn't require deposit (full payment or deposit handled via payment flow)
+        # Cash requires deposit, Stripe and PayPal don't require deposit (full payment or deposit handled via payment flow)
         requires_deposit = payment_method == "cash"
         deposit_percentage = 20 if requires_deposit else 0
         deposit_amount = (float(total_price) * deposit_percentage) / 100 if requires_deposit else 0
         
-        # For Stripe, booking can be confirmed immediately after payment
+        # For Stripe and PayPal, booking can be confirmed immediately after payment
         initial_status = BookingStatus.pending
-        if payment_method == "stripe":
-            # Will be confirmed after successful Stripe payment
+        if payment_method in ["stripe", "paypal"]:
+            # Will be confirmed after successful payment
             initial_status = BookingStatus.pending
         
         # Create booking
@@ -279,19 +302,32 @@ async def create_booking(
         db.add(booking)
         db.flush()
         
-        # Create payment record if Stripe payment method is selected
-        if payment_method == "stripe":
+        # Create payment record if Stripe or PayPal payment method is selected
+        if payment_method in ["stripe", "paypal"]:
             from ..models.payment import Payment, PaymentMethod, PaymentStatus, PaymentType
+            if payment_method == "stripe":
+                payment_method_enum = PaymentMethod.stripe
+            elif payment_method == "paypal":
+                payment_method_enum = PaymentMethod.paypal
+            else:
+                # This shouldn't happen, but just in case
+                logger.warning(f"Unexpected payment_method: {payment_method}, defaulting to stripe")
+                payment_method_enum = PaymentMethod.stripe
+            
+            logger.info(f"Creating payment for booking {booking.id} with payment_method: {payment_method} -> enum: {payment_method_enum.value}")
+            
             payment = Payment(
                 booking_id=booking.id,
                 amount=total_price,
-                payment_method=PaymentMethod.stripe,
+                payment_method=payment_method_enum,
                 payment_type=PaymentType.full,
                 payment_status=PaymentStatus.pending,
                 payment_date=None,
             )
             db.add(payment)
             db.flush()
+            
+            logger.info(f"Payment created: ID={payment.id}, method={payment.payment_method.value if hasattr(payment.payment_method, 'value') else payment.payment_method}")
         
         # Create deposit payment if required (for cash method)
         # Note: For cash payments, deposit is paid on arrival, so we don't create a pending payment record
@@ -301,7 +337,7 @@ async def create_booking(
         services = booking_data.get("services", [])
         if services:
             from ..models.service import Service
-            from ..models.service_usage import ServiceUsage
+            # ServiceUsage is already imported at the top of the file
             
             for service_item in services:
                 service_id = service_item.get("service_id")
@@ -354,8 +390,10 @@ async def create_booking(
         except Exception as e:
             # Log error but don't fail booking creation if invoice creation fails
             import logging
+            import traceback
             logger = logging.getLogger(__name__)
             logger.error(f"Failed to create invoice for booking {booking.id}: {str(e)}")
+            logger.error(f"Traceback: {traceback.format_exc()}")
         
         # Fetch with relations for proper serialization (eager load payments and service_usages)
         from sqlalchemy.orm import joinedload, selectinload
@@ -369,12 +407,25 @@ async def create_booking(
         payment_status_from_payments = "unpaid"
         if booking.payments:
             latest_payment = sorted(booking.payments, key=lambda p: p.created_at, reverse=True)[0]
-            payment_method_from_payments = latest_payment.payment_method.value if isinstance(latest_payment.payment_method, PaymentMethod) else latest_payment.payment_method
+            # Safely extract payment method value
+            if isinstance(latest_payment.payment_method, PaymentMethod):
+                payment_method_from_payments = latest_payment.payment_method.value
+            elif hasattr(latest_payment.payment_method, 'value'):
+                payment_method_from_payments = latest_payment.payment_method.value
+            else:
+                payment_method_from_payments = str(latest_payment.payment_method)
+            
+            logger.info(f"Booking {booking.id} - Latest payment method: {payment_method_from_payments}, raw: {latest_payment.payment_method}")
+            
             if latest_payment.payment_status == PaymentStatus.completed:
                 payment_status_from_payments = "paid"
             elif latest_payment.payment_status == PaymentStatus.refunded:
                 payment_status_from_payments = "refunded"
         
+        # Use payment_method from payments if available, otherwise fall back to request payment_method
+        final_payment_method = payment_method_from_payments if payment_method_from_payments else payment_method
+        logger.info(f"Booking {booking.id} - Final payment_method: {final_payment_method} (from_payments: {payment_method_from_payments}, request: {payment_method})")
+        
         # Serialize booking properly
         booking_dict = {
             "id": booking.id,
@@ -386,7 +437,7 @@ async def create_booking(
             "guest_count": booking.num_guests,
             "total_price": float(booking.total_price) if booking.total_price else 0.0,
             "status": booking.status.value if isinstance(booking.status, BookingStatus) else booking.status,
-            "payment_method": payment_method_from_payments or payment_method,
+            "payment_method": final_payment_method,
             "payment_status": payment_status_from_payments,
             "deposit_paid": booking.deposit_paid,
             "requires_deposit": booking.requires_deposit,
@@ -408,7 +459,7 @@ async def create_booking(
                     "id": p.id,
                     "booking_id": p.booking_id,
                     "amount": float(p.amount) if p.amount else 0.0,
-                    "payment_method": p.payment_method.value if isinstance(p.payment_method, PaymentMethod) else p.payment_method,
+                    "payment_method": p.payment_method.value if isinstance(p.payment_method, PaymentMethod) else (p.payment_method.value if hasattr(p.payment_method, 'value') else str(p.payment_method)),
                     "payment_type": p.payment_type.value if isinstance(p.payment_type, PaymentType) else p.payment_type,
                     "deposit_percentage": p.deposit_percentage,
                     "payment_status": p.payment_status.value if isinstance(p.payment_status, PaymentStatus) else p.payment_status,
@@ -495,6 +546,11 @@ async def create_booking(
     except HTTPException:
         raise
     except Exception as e:
+        import logging
+        import traceback
+        logger = logging.getLogger(__name__)
+        logger.error(f"Error creating booking (payment_method: {payment_method}): {str(e)}")
+        logger.error(f"Traceback: {traceback.format_exc()}")
         db.rollback()
         raise HTTPException(status_code=500, detail=str(e))
 
@@ -530,17 +586,33 @@ async def get_booking_by_id(
         
         # Determine payment_method and payment_status from payments
         # Get latest payment efficiently (already loaded via joinedload)
-        payment_method = None
+        import logging
+        logger = logging.getLogger(__name__)
+        
+        payment_method_from_payments = None
         payment_status = "unpaid"
         if booking.payments:
             # Find latest payment (payments are already loaded, so this is fast)
             latest_payment = max(booking.payments, key=lambda p: p.created_at if p.created_at else datetime.min)
-            payment_method = latest_payment.payment_method.value if isinstance(latest_payment.payment_method, PaymentMethod) else latest_payment.payment_method
+            # Safely extract payment method value
+            if isinstance(latest_payment.payment_method, PaymentMethod):
+                payment_method_from_payments = latest_payment.payment_method.value
+            elif hasattr(latest_payment.payment_method, 'value'):
+                payment_method_from_payments = latest_payment.payment_method.value
+            else:
+                payment_method_from_payments = str(latest_payment.payment_method)
+            
+            logger.info(f"Get booking {id} - Latest payment method: {payment_method_from_payments}, raw: {latest_payment.payment_method}")
+            
             if latest_payment.payment_status == PaymentStatus.completed:
                 payment_status = "paid"
             elif latest_payment.payment_status == PaymentStatus.refunded:
                 payment_status = "refunded"
         
+        # Use payment_method from payments, fallback to "cash" if no payments
+        final_payment_method = payment_method_from_payments if payment_method_from_payments else "cash"
+        logger.info(f"Get booking {id} - Final payment_method: {final_payment_method}")
+        
         booking_dict = {
             "id": booking.id,
             "booking_number": booking.booking_number,
@@ -551,7 +623,7 @@ async def get_booking_by_id(
             "guest_count": booking.num_guests,  # Frontend expects guest_count
             "total_price": float(booking.total_price) if booking.total_price else 0.0,
             "status": booking.status.value if isinstance(booking.status, BookingStatus) else booking.status,
-            "payment_method": payment_method or "cash",
+            "payment_method": final_payment_method,
             "payment_status": payment_status,
             "deposit_paid": booking.deposit_paid,
             "requires_deposit": booking.requires_deposit,
@@ -605,7 +677,7 @@ async def get_booking_by_id(
                 {
                     "id": p.id,
                     "amount": float(p.amount) if p.amount else 0.0,
-                    "payment_method": p.payment_method.value if isinstance(p.payment_method, PaymentMethod) else p.payment_method,
+                    "payment_method": p.payment_method.value if isinstance(p.payment_method, PaymentMethod) else (p.payment_method.value if hasattr(p.payment_method, 'value') else str(p.payment_method)),
                     "payment_status": p.payment_status.value if isinstance(p.payment_status, PaymentStatus) else p.payment_status,
                 }
                 for p in booking.payments

Backend/src/routes/payment_routes.py

@@ -13,6 +13,7 @@ from ..models.booking import Booking, BookingStatus
 from ..utils.mailer import send_email
 from ..utils.email_templates import payment_confirmation_email_template
 from ..services.stripe_service import StripeService
+from ..services.paypal_service import PayPalService
 
 router = APIRouter(prefix="/payments", tags=["payments"])
 
@@ -588,3 +589,187 @@ async def stripe_webhook(
     except Exception as e:
         db.rollback()
         raise HTTPException(status_code=500, detail=str(e))
+
+
+@router.post("/paypal/create-order")
+async def create_paypal_order(
+    order_data: dict,
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db)
+):
+    """Create a PayPal order"""
+    try:
+        # Check if PayPal is configured
+        from ..services.paypal_service import get_paypal_client_id, get_paypal_client_secret
+        client_id = get_paypal_client_id(db)
+        if not client_id:
+            client_id = settings.PAYPAL_CLIENT_ID
+        
+        client_secret = get_paypal_client_secret(db)
+        if not client_secret:
+            client_secret = settings.PAYPAL_CLIENT_SECRET
+        
+        if not client_id or not client_secret:
+            raise HTTPException(
+                status_code=500,
+                detail="PayPal is not configured. Please configure PayPal settings in Admin Panel or set PAYPAL_CLIENT_ID and PAYPAL_CLIENT_SECRET environment variables."
+            )
+        
+        booking_id = order_data.get("booking_id")
+        amount = float(order_data.get("amount", 0))
+        currency = order_data.get("currency", "USD")
+        
+        if not booking_id or amount <= 0:
+            raise HTTPException(
+                status_code=400,
+                detail="booking_id and amount are required"
+            )
+        
+        # Validate amount
+        if amount > 100000:
+            raise HTTPException(
+                status_code=400,
+                detail=f"Amount ${amount:,.2f} exceeds PayPal's maximum of $100,000. Please contact support for large payments."
+            )
+        
+        # Verify booking exists and user has access
+        booking = db.query(Booking).filter(Booking.id == booking_id).first()
+        if not booking:
+            raise HTTPException(status_code=404, detail="Booking not found")
+        
+        if current_user.role_id != 1 and booking.user_id != current_user.id:
+            raise HTTPException(status_code=403, detail="Forbidden")
+        
+        # Get return URLs from request or use defaults
+        client_url = settings.CLIENT_URL or os.getenv("CLIENT_URL", "http://localhost:5173")
+        return_url = order_data.get("return_url", f"{client_url}/payment/paypal/return")
+        cancel_url = order_data.get("cancel_url", f"{client_url}/payment/paypal/cancel")
+        
+        # Create PayPal order
+        order = PayPalService.create_order(
+            amount=amount,
+            currency=currency,
+            metadata={
+                "booking_id": str(booking_id),
+                "booking_number": booking.booking_number,
+                "user_id": str(current_user.id),
+                "description": f"Hotel Booking Payment - {booking.booking_number}",
+                "return_url": return_url,
+                "cancel_url": cancel_url,
+            },
+            db=db
+        )
+        
+        if not order.get("approval_url"):
+            raise HTTPException(
+                status_code=500,
+                detail="Failed to create PayPal order. Approval URL is missing."
+            )
+        
+        return {
+            "status": "success",
+            "message": "PayPal order created successfully",
+            "data": {
+                "order_id": order["id"],
+                "approval_url": order["approval_url"],
+                "status": order["status"],
+            }
+        }
+    except HTTPException:
+        raise
+    except ValueError as e:
+        import logging
+        logger = logging.getLogger(__name__)
+        logger.error(f"PayPal order creation error: {str(e)}")
+        raise HTTPException(status_code=400, detail=str(e))
+    except Exception as e:
+        import logging
+        logger = logging.getLogger(__name__)
+        logger.error(f"Unexpected error creating PayPal order: {str(e)}", exc_info=True)
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+@router.post("/paypal/capture")
+async def capture_paypal_payment(
+    payment_data: dict,
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db)
+):
+    """Capture a PayPal payment"""
+    try:
+        order_id = payment_data.get("order_id")
+        booking_id = payment_data.get("booking_id")
+        
+        if not order_id:
+            raise HTTPException(
+                status_code=400,
+                detail="order_id is required"
+            )
+        
+        # Confirm payment (this commits the transaction internally)
+        payment = PayPalService.confirm_payment(
+            order_id=order_id,
+            db=db,
+            booking_id=booking_id
+        )
+        
+        # Ensure the transaction is committed
+        try:
+            db.commit()
+        except Exception:
+            pass
+        
+        # Get fresh booking from database
+        booking = db.query(Booking).filter(Booking.id == payment["booking_id"]).first()
+        if booking:
+            db.refresh(booking)
+        
+        # Send payment confirmation email (non-blocking)
+        if booking and booking.user:
+            try:
+                client_url = settings.CLIENT_URL or os.getenv("CLIENT_URL", "http://localhost:5173")
+                email_html = payment_confirmation_email_template(
+                    booking_number=booking.booking_number,
+                    guest_name=booking.user.full_name,
+                    amount=payment["amount"],
+                    payment_method="paypal",
+                    transaction_id=payment["transaction_id"],
+                    client_url=client_url
+                )
+                await send_email(
+                    to=booking.user.email,
+                    subject=f"Payment Confirmed - {booking.booking_number}",
+                    html=email_html
+                )
+            except Exception as e:
+                import logging
+                logger = logging.getLogger(__name__)
+                logger.warning(f"Failed to send payment confirmation email: {e}")
+        
+        return {
+            "status": "success",
+            "message": "Payment confirmed successfully",
+            "data": {
+                "payment": payment,
+                "booking": {
+                    "id": booking.id if booking else None,
+                    "booking_number": booking.booking_number if booking else None,
+                    "status": booking.status.value if booking else None,
+                }
+            }
+        }
+    except HTTPException:
+        db.rollback()
+        raise
+    except ValueError as e:
+        import logging
+        logger = logging.getLogger(__name__)
+        logger.error(f"PayPal payment confirmation error: {str(e)}")
+        db.rollback()
+        raise HTTPException(status_code=400, detail=str(e))
+    except Exception as e:
+        import logging
+        logger = logging.getLogger(__name__)
+        logger.error(f"Unexpected error confirming PayPal payment: {str(e)}", exc_info=True)
+        db.rollback()
+        raise HTTPException(status_code=500, detail=str(e))

Backend/src/routes/room_routes.py

@@ -122,17 +122,80 @@ async def search_available_rooms(
     request: Request,
     from_date: str = Query(..., alias="from"),
     to_date: str = Query(..., alias="to"),
+    roomId: Optional[int] = Query(None, alias="roomId"),
     type: Optional[str] = Query(None),
     capacity: Optional[int] = Query(None),
     page: int = Query(1, ge=1),
     limit: int = Query(12, ge=1, le=100),
     db: Session = Depends(get_db)
 ):
-    """Search for available rooms"""
+    """Search for available rooms or check specific room availability"""
     try:
-        check_in = datetime.fromisoformat(from_date.replace('Z', '+00:00'))
-        check_out = datetime.fromisoformat(to_date.replace('Z', '+00:00'))
+        # Parse dates - handle both date-only and datetime formats
+        try:
+            if 'T' in from_date or 'Z' in from_date or '+' in from_date:
+                check_in = datetime.fromisoformat(from_date.replace('Z', '+00:00'))
+            else:
+                check_in = datetime.strptime(from_date, '%Y-%m-%d')
+        except ValueError:
+            raise HTTPException(status_code=400, detail=f"Invalid from date format: {from_date}")
         
+        try:
+            if 'T' in to_date or 'Z' in to_date or '+' in to_date:
+                check_out = datetime.fromisoformat(to_date.replace('Z', '+00:00'))
+            else:
+                check_out = datetime.strptime(to_date, '%Y-%m-%d')
+        except ValueError:
+            raise HTTPException(status_code=400, detail=f"Invalid to date format: {to_date}")
+        
+        # If checking a specific room, handle it differently
+        if roomId:
+            # Check if room exists
+            room = db.query(Room).filter(Room.id == roomId).first()
+            if not room:
+                raise HTTPException(status_code=404, detail="Room not found")
+            
+            # Check if room is available
+            if room.status != RoomStatus.available:
+                return {
+                    "status": "success",
+                    "data": {
+                        "available": False,
+                        "message": "Room is not available",
+                        "room_id": roomId
+                    }
+                }
+            
+            # Check for overlapping bookings
+            overlapping = db.query(Booking).filter(
+                and_(
+                    Booking.room_id == roomId,
+                    Booking.status != BookingStatus.cancelled,
+                    Booking.check_in_date < check_out,
+                    Booking.check_out_date > check_in
+                )
+            ).first()
+            
+            if overlapping:
+                return {
+                    "status": "success",
+                    "data": {
+                        "available": False,
+                        "message": "Room is already booked for the selected dates",
+                        "room_id": roomId
+                    }
+                }
+            
+            return {
+                "status": "success",
+                "data": {
+                    "available": True,
+                    "message": "Room is available",
+                    "room_id": roomId
+                }
+            }
+        
+        # Original search functionality
         if check_in >= check_out:
             raise HTTPException(
                 status_code=400,

Backend/src/routes/system_settings_routes.py

@@ -323,6 +323,162 @@ async def update_stripe_settings(
         raise HTTPException(status_code=500, detail=str(e))
 
 
+@router.get("/paypal")
+async def get_paypal_settings(
+    current_user: User = Depends(authorize_roles("admin")),
+    db: Session = Depends(get_db)
+):
+    """Get PayPal payment settings (Admin only)"""
+    try:
+        client_id_setting = db.query(SystemSettings).filter(
+            SystemSettings.key == "paypal_client_id"
+        ).first()
+        
+        client_secret_setting = db.query(SystemSettings).filter(
+            SystemSettings.key == "paypal_client_secret"
+        ).first()
+        
+        mode_setting = db.query(SystemSettings).filter(
+            SystemSettings.key == "paypal_mode"
+        ).first()
+        
+        # Mask secret for security (only show last 4 characters)
+        def mask_key(key_value: str) -> str:
+            if not key_value or len(key_value) < 4:
+                return ""
+            return "*" * (len(key_value) - 4) + key_value[-4:]
+        
+        result = {
+            "paypal_client_id": "",
+            "paypal_client_secret": "",
+            "paypal_mode": "sandbox",
+            "paypal_client_secret_masked": "",
+            "has_client_id": False,
+            "has_client_secret": False,
+        }
+        
+        if client_id_setting:
+            result["paypal_client_id"] = client_id_setting.value
+            result["has_client_id"] = bool(client_id_setting.value)
+            result["updated_at"] = client_id_setting.updated_at.isoformat() if client_id_setting.updated_at else None
+            result["updated_by"] = client_id_setting.updated_by.full_name if client_id_setting.updated_by else None
+        
+        if client_secret_setting:
+            result["paypal_client_secret"] = client_secret_setting.value
+            result["paypal_client_secret_masked"] = mask_key(client_secret_setting.value)
+            result["has_client_secret"] = bool(client_secret_setting.value)
+        
+        if mode_setting:
+            result["paypal_mode"] = mode_setting.value or "sandbox"
+        
+        return {
+            "status": "success",
+            "data": result
+        }
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+@router.put("/paypal")
+async def update_paypal_settings(
+    paypal_data: dict,
+    current_user: User = Depends(authorize_roles("admin")),
+    db: Session = Depends(get_db)
+):
+    """Update PayPal payment settings (Admin only)"""
+    try:
+        client_id = paypal_data.get("paypal_client_id", "").strip()
+        client_secret = paypal_data.get("paypal_client_secret", "").strip()
+        mode = paypal_data.get("paypal_mode", "sandbox").strip().lower()
+        
+        # Validate mode
+        if mode and mode not in ["sandbox", "live"]:
+            raise HTTPException(
+                status_code=400,
+                detail="Invalid PayPal mode. Must be 'sandbox' or 'live'"
+            )
+        
+        # Update or create client ID setting
+        if client_id:
+            setting = db.query(SystemSettings).filter(
+                SystemSettings.key == "paypal_client_id"
+            ).first()
+            
+            if setting:
+                setting.value = client_id
+                setting.updated_by_id = current_user.id
+            else:
+                setting = SystemSettings(
+                    key="paypal_client_id",
+                    value=client_id,
+                    description="PayPal client ID for processing payments",
+                    updated_by_id=current_user.id
+                )
+                db.add(setting)
+        
+        # Update or create client secret setting
+        if client_secret:
+            setting = db.query(SystemSettings).filter(
+                SystemSettings.key == "paypal_client_secret"
+            ).first()
+            
+            if setting:
+                setting.value = client_secret
+                setting.updated_by_id = current_user.id
+            else:
+                setting = SystemSettings(
+                    key="paypal_client_secret",
+                    value=client_secret,
+                    description="PayPal client secret for processing payments",
+                    updated_by_id=current_user.id
+                )
+                db.add(setting)
+        
+        # Update or create mode setting
+        if mode:
+            setting = db.query(SystemSettings).filter(
+                SystemSettings.key == "paypal_mode"
+            ).first()
+            
+            if setting:
+                setting.value = mode
+                setting.updated_by_id = current_user.id
+            else:
+                setting = SystemSettings(
+                    key="paypal_mode",
+                    value=mode,
+                    description="PayPal mode: sandbox or live",
+                    updated_by_id=current_user.id
+                )
+                db.add(setting)
+        
+        db.commit()
+        
+        # Return masked values
+        def mask_key(key_value: str) -> str:
+            if not key_value or len(key_value) < 4:
+                return ""
+            return "*" * (len(key_value) - 4) + key_value[-4:]
+        
+        return {
+            "status": "success",
+            "message": "PayPal settings updated successfully",
+            "data": {
+                "paypal_client_id": client_id if client_id else "",
+                "paypal_client_secret": client_secret if client_secret else "",
+                "paypal_mode": mode,
+                "paypal_client_secret_masked": mask_key(client_secret) if client_secret else "",
+                "has_client_id": bool(client_id),
+                "has_client_secret": bool(client_secret),
+            }
+        }
+    except HTTPException:
+        raise
+    except Exception as e:
+        db.rollback()
+        raise HTTPException(status_code=500, detail=str(e))
+
+
 @router.get("/smtp")
 async def get_smtp_settings(
     current_user: User = Depends(authorize_roles("admin")),

Backend/src/schemas/auth.py

@@ -31,6 +31,7 @@ class LoginRequest(BaseModel):
     email: EmailStr
     password: str
     rememberMe: Optional[bool] = False
+    mfaToken: Optional[str] = None
 
 
 class RefreshTokenRequest(BaseModel):
@@ -85,3 +86,23 @@ class MessageResponse(BaseModel):
     status: str
     message: str
 
+
+class MFAInitResponse(BaseModel):
+    secret: str
+    qr_code: str  # Base64 data URL
+
+
+class EnableMFARequest(BaseModel):
+    secret: str
+    verification_token: str
+
+
+class VerifyMFARequest(BaseModel):
+    token: str
+    is_backup_code: Optional[bool] = False
+
+
+class MFAStatusResponse(BaseModel):
+    mfa_enabled: bool
+    backup_codes_count: int
+

Backend/src/services/auth_service.py

@@ -144,8 +144,8 @@ class AuthService:
             "refreshToken": tokens["refreshToken"]
         }
 
-    async def login(self, db: Session, email: str, password: str, remember_me: bool = False) -> dict:
-        """Login user"""
+    async def login(self, db: Session, email: str, password: str, remember_me: bool = False, mfa_token: str = None) -> dict:
+        """Login user with optional MFA verification"""
         # Find user with role and password
         user = db.query(User).filter(User.email == email).first()
         if not user:
@@ -158,6 +158,21 @@ class AuthService:
         if not self.verify_password(password, user.password):
             raise ValueError("Invalid email or password")
 
+        # Check if MFA is enabled
+        if user.mfa_enabled:
+            if not mfa_token:
+                # Return special response indicating MFA is required
+                return {
+                    "requires_mfa": True,
+                    "user_id": user.id
+                }
+            
+            # Verify MFA token
+            from ..services.mfa_service import mfa_service
+            is_backup_code = len(mfa_token) == 8  # Backup codes are 8 characters
+            if not mfa_service.verify_mfa(db, user.id, mfa_token, is_backup_code):
+                raise ValueError("Invalid MFA token")
+
         # Generate tokens
         tokens = self.generate_tokens(user.id)
 

Backend/src/services/invoice_service.py

@@ -66,7 +66,8 @@ class InvoiceService:
         
         booking = db.query(Booking).options(
             selectinload(Booking.service_usages).selectinload("service"),
-            selectinload(Booking.room).selectinload("room_type")
+            selectinload(Booking.room).selectinload("room_type"),
+            selectinload(Booking.payments)
         ).filter(Booking.id == booking_id).first()
         if not booking:
             raise ValueError("Booking not found")
@@ -82,6 +83,10 @@ class InvoiceService:
         # Initial subtotal is booking total (room + services)
         subtotal = float(booking.total_price)
         
+        # Calculate tax and total amounts
+        tax_amount = (subtotal - discount_amount) * (tax_rate / 100)
+        total_amount = subtotal + tax_amount - discount_amount
+        
         # Calculate amount paid from completed payments
         amount_paid = sum(
             float(p.amount) for p in booking.payments
@@ -134,6 +139,7 @@ class InvoiceService:
         )
         
         db.add(invoice)
+        db.flush()  # Flush to get invoice.id before creating invoice items
         
         # Create invoice items from booking
         # Calculate room price (total_price includes services, so subtract services)

Backend/src/services/mfa_service.py

@@ -0,0 +1,299 @@
+"""
+Multi-Factor Authentication (MFA) Service
+Handles TOTP-based MFA functionality
+"""
+import pyotp
+import qrcode
+import secrets
+import hashlib
+import json
+import base64
+import io
+from typing import List, Optional, Dict, Tuple
+from sqlalchemy.orm import Session
+from ..models.user import User
+import logging
+
+logger = logging.getLogger(__name__)
+
+
+class MFAService:
+    """Service for managing Multi-Factor Authentication"""
+
+    @staticmethod
+    def generate_secret() -> str:
+        """Generate a new TOTP secret"""
+        return pyotp.random_base32()
+
+    @staticmethod
+    def generate_qr_code(secret: str, email: str, app_name: str = "Hotel Booking") -> str:
+        """
+        Generate QR code data URL for TOTP setup
+        
+        Args:
+            secret: TOTP secret key
+            email: User's email address
+            app_name: Application name for the authenticator app
+            
+        Returns:
+            Base64 encoded QR code image data URL
+        """
+        # Create provisioning URI for authenticator apps
+        totp_uri = pyotp.totp.TOTP(secret).provisioning_uri(
+            name=email,
+            issuer_name=app_name
+        )
+        
+        # Generate QR code
+        qr = qrcode.QRCode(
+            version=1,
+            error_correction=qrcode.constants.ERROR_CORRECT_L,
+            box_size=10,
+            border=4,
+        )
+        qr.add_data(totp_uri)
+        qr.make(fit=True)
+        
+        # Create image
+        img = qr.make_image(fill_color="black", back_color="white")
+        
+        # Convert to base64 data URL
+        buffer = io.BytesIO()
+        img.save(buffer, format='PNG')
+        img_data = base64.b64encode(buffer.getvalue()).decode()
+        
+        return f"data:image/png;base64,{img_data}"
+
+    @staticmethod
+    def generate_backup_codes(count: int = 10) -> List[str]:
+        """
+        Generate backup codes for MFA recovery
+        
+        Args:
+            count: Number of backup codes to generate (default: 10)
+            
+        Returns:
+            List of backup codes (8-character alphanumeric)
+        """
+        codes = []
+        for _ in range(count):
+            # Generate 8-character alphanumeric code
+            code = secrets.token_urlsafe(6).upper()[:8]
+            codes.append(code)
+        return codes
+
+    @staticmethod
+    def hash_backup_code(code: str) -> str:
+        """
+        Hash a backup code for storage (SHA-256)
+        
+        Args:
+            code: Plain backup code
+            
+        Returns:
+            Hashed backup code
+        """
+        return hashlib.sha256(code.encode()).hexdigest()
+
+    @staticmethod
+    def verify_backup_code(code: str, hashed_codes: List[str]) -> bool:
+        """
+        Verify if a backup code matches any hashed code
+        
+        Args:
+            code: Plain backup code to verify
+            hashed_codes: List of hashed backup codes
+            
+        Returns:
+            True if code matches, False otherwise
+        """
+        code_hash = MFAService.hash_backup_code(code)
+        return code_hash in hashed_codes
+
+    @staticmethod
+    def verify_totp(token: str, secret: str) -> bool:
+        """
+        Verify a TOTP token
+        
+        Args:
+            token: 6-digit TOTP token from authenticator app
+            secret: User's TOTP secret
+            
+        Returns:
+            True if token is valid, False otherwise
+        """
+        try:
+            totp = pyotp.TOTP(secret)
+            # Allow tokens from current and previous/next time window for clock skew
+            return totp.verify(token, valid_window=1)
+        except Exception as e:
+            logger.error(f"Error verifying TOTP: {str(e)}")
+            return False
+
+    @staticmethod
+    def enable_mfa(
+        db: Session,
+        user_id: int,
+        secret: str,
+        verification_token: str
+    ) -> Tuple[bool, List[str]]:
+        """
+        Enable MFA for a user after verifying the token
+        
+        Args:
+            db: Database session
+            user_id: User ID
+            secret: TOTP secret
+            verification_token: Token from authenticator app to verify
+            
+        Returns:
+            Tuple of (success, backup_codes)
+        """
+        user = db.query(User).filter(User.id == user_id).first()
+        if not user:
+            raise ValueError("User not found")
+
+        # Verify the token before enabling
+        if not MFAService.verify_totp(verification_token, secret):
+            raise ValueError("Invalid verification token")
+
+        # Generate backup codes
+        backup_codes = MFAService.generate_backup_codes()
+        hashed_codes = [MFAService.hash_backup_code(code) for code in backup_codes]
+
+        # Update user
+        user.mfa_enabled = True
+        user.mfa_secret = secret
+        user.mfa_backup_codes = json.dumps(hashed_codes)
+
+        db.commit()
+
+        # Return plain backup codes (only shown once)
+        return True, backup_codes
+
+    @staticmethod
+    def disable_mfa(db: Session, user_id: int) -> bool:
+        """
+        Disable MFA for a user
+        
+        Args:
+            db: Database session
+            user_id: User ID
+            
+        Returns:
+            True if successful
+        """
+        user = db.query(User).filter(User.id == user_id).first()
+        if not user:
+            raise ValueError("User not found")
+
+        user.mfa_enabled = False
+        user.mfa_secret = None
+        user.mfa_backup_codes = None
+
+        db.commit()
+        return True
+
+    @staticmethod
+    def verify_mfa(
+        db: Session,
+        user_id: int,
+        token: str,
+        is_backup_code: bool = False
+    ) -> bool:
+        """
+        Verify MFA token or backup code for a user
+        
+        Args:
+            db: Database session
+            user_id: User ID
+            token: TOTP token or backup code
+            is_backup_code: Whether the token is a backup code
+            
+        Returns:
+            True if verification successful, False otherwise
+        """
+        user = db.query(User).filter(User.id == user_id).first()
+        if not user:
+            raise ValueError("User not found")
+
+        if not user.mfa_enabled or not user.mfa_secret:
+            raise ValueError("MFA is not enabled for this user")
+
+        if is_backup_code:
+            # Verify backup code
+            if not user.mfa_backup_codes:
+                return False
+
+            hashed_codes = json.loads(user.mfa_backup_codes)
+            if not MFAService.verify_backup_code(token, hashed_codes):
+                return False
+
+            # Remove used backup code
+            code_hash = MFAService.hash_backup_code(token)
+            hashed_codes.remove(code_hash)
+            user.mfa_backup_codes = json.dumps(hashed_codes) if hashed_codes else None
+            db.commit()
+            return True
+        else:
+            # Verify TOTP token
+            return MFAService.verify_totp(token, user.mfa_secret)
+
+    @staticmethod
+    def regenerate_backup_codes(db: Session, user_id: int) -> List[str]:
+        """
+        Regenerate backup codes for a user
+        
+        Args:
+            db: Database session
+            user_id: User ID
+            
+        Returns:
+            List of new backup codes (plain, shown once)
+        """
+        user = db.query(User).filter(User.id == user_id).first()
+        if not user:
+            raise ValueError("User not found")
+
+        if not user.mfa_enabled:
+            raise ValueError("MFA is not enabled for this user")
+
+        # Generate new backup codes
+        backup_codes = MFAService.generate_backup_codes()
+        hashed_codes = [MFAService.hash_backup_code(code) for code in backup_codes]
+
+        user.mfa_backup_codes = json.dumps(hashed_codes)
+        db.commit()
+
+        # Return plain backup codes (only shown once)
+        return backup_codes
+
+    @staticmethod
+    def get_mfa_status(db: Session, user_id: int) -> Dict:
+        """
+        Get MFA status for a user
+        
+        Args:
+            db: Database session
+            user_id: User ID
+            
+        Returns:
+            Dictionary with MFA status information
+        """
+        user = db.query(User).filter(User.id == user_id).first()
+        if not user:
+            raise ValueError("User not found")
+
+        backup_codes_count = 0
+        if user.mfa_backup_codes:
+            backup_codes_count = len(json.loads(user.mfa_backup_codes))
+
+        return {
+            "mfa_enabled": user.mfa_enabled,
+            "backup_codes_count": backup_codes_count
+        }
+
+
+# Create singleton instance
+mfa_service = MFAService()
+

Backend/src/services/paypal_service.py

@@ -0,0 +1,429 @@
+"""
+PayPal payment service for processing PayPal payments
+"""
+from paypalcheckoutsdk.core import PayPalHttpClient, SandboxEnvironment, LiveEnvironment
+from paypalcheckoutsdk.orders import OrdersCreateRequest, OrdersGetRequest, OrdersCaptureRequest
+from paypalcheckoutsdk.payments import CapturesRefundRequest
+from typing import Optional, Dict, Any
+from ..config.settings import settings
+from ..models.payment import Payment, PaymentMethod, PaymentType, PaymentStatus
+from ..models.booking import Booking, BookingStatus
+from ..models.system_settings import SystemSettings
+from sqlalchemy.orm import Session
+from datetime import datetime
+import json
+
+
+def get_paypal_client_id(db: Session) -> Optional[str]:
+    """Get PayPal client ID from database or environment variable"""
+    try:
+        setting = db.query(SystemSettings).filter(
+            SystemSettings.key == "paypal_client_id"
+        ).first()
+        if setting and setting.value:
+            return setting.value
+    except Exception:
+        pass
+    # Fallback to environment variable
+    return settings.PAYPAL_CLIENT_ID if settings.PAYPAL_CLIENT_ID else None
+
+
+def get_paypal_client_secret(db: Session) -> Optional[str]:
+    """Get PayPal client secret from database or environment variable"""
+    try:
+        setting = db.query(SystemSettings).filter(
+            SystemSettings.key == "paypal_client_secret"
+        ).first()
+        if setting and setting.value:
+            return setting.value
+    except Exception:
+        pass
+    # Fallback to environment variable
+    return settings.PAYPAL_CLIENT_SECRET if settings.PAYPAL_CLIENT_SECRET else None
+
+
+def get_paypal_mode(db: Session) -> str:
+    """Get PayPal mode from database or environment variable"""
+    try:
+        setting = db.query(SystemSettings).filter(
+            SystemSettings.key == "paypal_mode"
+        ).first()
+        if setting and setting.value:
+            return setting.value
+    except Exception:
+        pass
+    # Fallback to environment variable
+    return settings.PAYPAL_MODE if settings.PAYPAL_MODE else "sandbox"
+
+
+def get_paypal_client(db: Optional[Session] = None) -> PayPalHttpClient:
+    """
+    Get PayPal HTTP client
+    
+    Args:
+        db: Optional database session to get credentials from database
+        
+    Returns:
+        PayPalHttpClient instance
+    """
+    client_id = None
+    client_secret = None
+    mode = "sandbox"
+    
+    if db:
+        client_id = get_paypal_client_id(db)
+        client_secret = get_paypal_client_secret(db)
+        mode = get_paypal_mode(db)
+    
+    if not client_id:
+        client_id = settings.PAYPAL_CLIENT_ID
+    if not client_secret:
+        client_secret = settings.PAYPAL_CLIENT_SECRET
+    if not mode:
+        mode = settings.PAYPAL_MODE or "sandbox"
+    
+    if not client_id or not client_secret:
+        raise ValueError("PayPal credentials are not configured")
+    
+    # Create environment based on mode
+    if mode.lower() == "live":
+        environment = LiveEnvironment(client_id=client_id, client_secret=client_secret)
+    else:
+        environment = SandboxEnvironment(client_id=client_id, client_secret=client_secret)
+    
+    return PayPalHttpClient(environment)
+
+
+class PayPalService:
+    """Service for handling PayPal payments"""
+    
+    @staticmethod
+    def create_order(
+        amount: float,
+        currency: str = "USD",
+        metadata: Optional[Dict[str, Any]] = None,
+        db: Optional[Session] = None
+    ) -> Dict[str, Any]:
+        """
+        Create a PayPal order
+        
+        Args:
+            amount: Payment amount in currency units
+            currency: Currency code (default: USD)
+            metadata: Additional metadata to attach to the order
+            db: Optional database session to get credentials from database
+            
+        Returns:
+            Order object with approval URL and order ID
+        """
+        client = get_paypal_client(db)
+        
+        # Validate amount
+        if amount <= 0:
+            raise ValueError("Amount must be greater than 0")
+        if amount > 100000:
+            raise ValueError(f"Amount ${amount:,.2f} exceeds PayPal's maximum of $100,000")
+        
+        # Create order request
+        request = OrdersCreateRequest()
+        request.prefer("return=representation")
+        
+        # Build order body
+        order_data = {
+            "intent": "CAPTURE",
+            "purchase_units": [
+                {
+                    "amount": {
+                        "currency_code": currency.upper(),
+                        "value": f"{amount:.2f}"
+                    },
+                    "description": metadata.get("description", "Hotel Booking Payment") if metadata else "Hotel Booking Payment",
+                    "custom_id": metadata.get("booking_id") if metadata else None,
+                }
+            ],
+            "application_context": {
+                "brand_name": "Hotel Booking",
+                "landing_page": "BILLING",
+                "user_action": "PAY_NOW",
+                "return_url": metadata.get("return_url") if metadata else None,
+                "cancel_url": metadata.get("cancel_url") if metadata else None,
+            }
+        }
+        
+        # Add metadata if provided
+        if metadata:
+            order_data["purchase_units"][0]["invoice_id"] = metadata.get("booking_number")
+        
+        request.request_body(order_data)
+        
+        try:
+            response = client.execute(request)
+            order = response.result
+            
+            # Extract approval URL
+            approval_url = None
+            for link in order.links:
+                if link.rel == "approve":
+                    approval_url = link.href
+                    break
+            
+            return {
+                "id": order.id,
+                "status": order.status,
+                "approval_url": approval_url,
+                "amount": amount,
+                "currency": currency.upper(),
+            }
+        except Exception as e:
+            error_msg = str(e)
+            # Try to extract more details from PayPal error
+            if hasattr(e, 'message'):
+                error_msg = e.message
+            elif hasattr(e, 'details') and e.details:
+                error_msg = json.dumps(e.details)
+            raise ValueError(f"PayPal error: {error_msg}")
+    
+    @staticmethod
+    def get_order(
+        order_id: str,
+        db: Optional[Session] = None
+    ) -> Dict[str, Any]:
+        """
+        Retrieve an order by ID
+        
+        Args:
+            order_id: PayPal order ID
+            db: Optional database session to get credentials from database
+            
+        Returns:
+            Order object
+        """
+        client = get_paypal_client(db)
+        
+        request = OrdersGetRequest(order_id)
+        
+        try:
+            response = client.execute(request)
+            order = response.result
+            
+            # Extract amount from purchase units
+            amount = 0.0
+            currency = "USD"
+            if order.purchase_units and len(order.purchase_units) > 0:
+                amount_str = order.purchase_units[0].amount.value
+                currency = order.purchase_units[0].amount.currency_code
+                amount = float(amount_str)
+            
+            return {
+                "id": order.id,
+                "status": order.status,
+                "amount": amount,
+                "currency": currency,
+                "create_time": order.create_time,
+                "update_time": order.update_time,
+            }
+        except Exception as e:
+            error_msg = str(e)
+            if hasattr(e, 'message'):
+                error_msg = e.message
+            raise ValueError(f"PayPal error: {error_msg}")
+    
+    @staticmethod
+    def capture_order(
+        order_id: str,
+        db: Optional[Session] = None
+    ) -> Dict[str, Any]:
+        """
+        Capture a PayPal order
+        
+        Args:
+            order_id: PayPal order ID
+            db: Optional database session to get credentials from database
+            
+        Returns:
+            Capture details
+        """
+        client = get_paypal_client(db)
+        
+        request = OrdersCaptureRequest(order_id)
+        request.prefer("return=representation")
+        
+        try:
+            response = client.execute(request)
+            order = response.result
+            
+            # Extract capture details
+            capture_id = None
+            amount = 0.0
+            currency = "USD"
+            status = order.status
+            
+            if order.purchase_units and len(order.purchase_units) > 0:
+                payments = order.purchase_units[0].payments
+                if payments and payments.captures and len(payments.captures) > 0:
+                    capture = payments.captures[0]
+                    capture_id = capture.id
+                    amount_str = capture.amount.value
+                    currency = capture.amount.currency_code
+                    amount = float(amount_str)
+                    status = capture.status
+            
+            return {
+                "order_id": order.id,
+                "capture_id": capture_id,
+                "status": status,
+                "amount": amount,
+                "currency": currency,
+            }
+        except Exception as e:
+            error_msg = str(e)
+            if hasattr(e, 'message'):
+                error_msg = e.message
+            raise ValueError(f"PayPal error: {error_msg}")
+    
+    @staticmethod
+    def confirm_payment(
+        order_id: str,
+        db: Session,
+        booking_id: Optional[int] = None
+    ) -> Dict[str, Any]:
+        """
+        Confirm a payment and update database records
+        
+        Args:
+            order_id: PayPal order ID
+            db: Database session
+            booking_id: Optional booking ID for metadata lookup
+            
+        Returns:
+            Payment record dictionary
+        """
+        try:
+            # First capture the order
+            capture_data = PayPalService.capture_order(order_id, db)
+            
+            # Get order details to extract booking_id from metadata if not provided
+            if not booking_id:
+                order_data = PayPalService.get_order(order_id, db)
+                # Try to get booking_id from custom_id in purchase_units
+                # Note: We'll need to store booking_id in the order metadata when creating
+            
+            # For now, we'll require booking_id to be passed
+            if not booking_id:
+                raise ValueError("Booking ID is required")
+            
+            booking = db.query(Booking).filter(Booking.id == booking_id).first()
+            if not booking:
+                raise ValueError("Booking not found")
+            
+            # Check capture status
+            capture_status = capture_data.get("status")
+            if capture_status not in ["COMPLETED", "PENDING"]:
+                raise ValueError(f"Payment capture not in a valid state. Status: {capture_status}")
+            
+            # Find existing payment or create new one
+            # First try to find by transaction_id (for already captured payments)
+            payment = db.query(Payment).filter(
+                Payment.booking_id == booking_id,
+                Payment.transaction_id == order_id,
+                Payment.payment_method == PaymentMethod.paypal
+            ).first()
+            
+            # If not found, try to find pending PayPal payment for this booking
+            if not payment:
+                payment = db.query(Payment).filter(
+                    Payment.booking_id == booking_id,
+                    Payment.payment_method == PaymentMethod.paypal,
+                    Payment.payment_status == PaymentStatus.pending
+                ).order_by(Payment.created_at.desc()).first()
+            
+            amount = capture_data["amount"]
+            capture_id = capture_data.get("capture_id")
+            
+            if payment:
+                # Update existing payment
+                if capture_status == "COMPLETED":
+                    payment.payment_status = PaymentStatus.completed
+                    payment.payment_date = datetime.utcnow()
+                # If pending, keep as pending
+                payment.amount = amount
+                if capture_id:
+                    payment.transaction_id = f"{order_id}|{capture_id}"
+            else:
+                # Create new payment record
+                payment_type = PaymentType.full
+                if booking.requires_deposit and not booking.deposit_paid:
+                    payment_type = PaymentType.deposit
+                
+                payment_status_enum = PaymentStatus.completed if capture_status == "COMPLETED" else PaymentStatus.pending
+                payment_date = datetime.utcnow() if capture_status == "COMPLETED" else None
+                
+                transaction_id = f"{order_id}|{capture_id}" if capture_id else order_id
+                
+                payment = Payment(
+                    booking_id=booking_id,
+                    amount=amount,
+                    payment_method=PaymentMethod.paypal,
+                    payment_type=payment_type,
+                    payment_status=payment_status_enum,
+                    transaction_id=transaction_id,
+                    payment_date=payment_date,
+                    notes=f"PayPal payment - Order: {order_id}, Capture: {capture_id} (Status: {capture_status})",
+                )
+                db.add(payment)
+            
+            # Commit payment first
+            db.commit()
+            db.refresh(payment)
+            
+            # Update booking status only if payment is completed
+            if payment.payment_status == PaymentStatus.completed:
+                db.refresh(booking)
+                
+                if payment.payment_type == PaymentType.deposit:
+                    booking.deposit_paid = True
+                    if booking.status == BookingStatus.pending:
+                        booking.status = BookingStatus.confirmed
+                elif payment.payment_type == PaymentType.full:
+                    total_paid = sum(
+                        float(p.amount) for p in booking.payments
+                        if p.payment_status == PaymentStatus.completed
+                    )
+                    
+                    if total_paid >= float(booking.total_price) or float(payment.amount) >= float(booking.total_price):
+                        booking.status = BookingStatus.confirmed
+                
+                db.commit()
+                db.refresh(booking)
+            
+            # Safely get enum values
+            def get_enum_value(enum_obj):
+                if enum_obj is None:
+                    return None
+                if isinstance(enum_obj, (PaymentMethod, PaymentType, PaymentStatus)):
+                    return enum_obj.value
+                return enum_obj
+            
+            return {
+                "id": payment.id,
+                "booking_id": payment.booking_id,
+                "amount": float(payment.amount) if payment.amount else 0.0,
+                "payment_method": get_enum_value(payment.payment_method),
+                "payment_type": get_enum_value(payment.payment_type),
+                "payment_status": get_enum_value(payment.payment_status),
+                "transaction_id": payment.transaction_id,
+                "payment_date": payment.payment_date.isoformat() if payment.payment_date else None,
+            }
+            
+        except ValueError as e:
+            db.rollback()
+            raise
+        except Exception as e:
+            import traceback
+            error_details = traceback.format_exc()
+            error_msg = str(e) if str(e) else f"{type(e).__name__}: {repr(e)}"
+            print(f"Error in confirm_payment: {error_msg}")
+            print(f"Traceback: {error_details}")
+            db.rollback()
+            raise ValueError(f"Error confirming payment: {error_msg}")
+

Backend/venv/bin/prichunkpng

@@ -0,0 +1,266 @@
+#!/home/gnx/Desktop/Hotel-Booking/Backend/venv/bin/python3
+# prichunkpng
+# Chunk editing tool.
+
+"""
+Make a new PNG by adding, delete, or replacing particular chunks.
+"""
+
+import argparse
+import collections
+
+# https://docs.python.org/2.7/library/io.html
+import io
+import re
+import string
+import struct
+import sys
+import zlib
+
+# Local module.
+import png
+
+
+Chunk = collections.namedtuple("Chunk", "type content")
+
+
+class ArgumentError(Exception):
+    """A user problem with the command arguments."""
+
+
+def process(out, args):
+    """Process the PNG file args.input to the output, chunk by chunk.
+    Chunks can be inserted, removed, replaced, or sometimes edited.
+    Chunks are specified by their 4 byte Chunk Type;
+    see https://www.w3.org/TR/2003/REC-PNG-20031110/#5Chunk-layout .
+    The chunks in args.delete will be removed from the stream.
+    The chunks in args.chunk will be inserted into the stream
+    with their contents taken from the named files.
+
+    Other options on the args object will create particular
+    ancillary chunks.
+
+    .gamma -> gAMA chunk
+    .sigbit -> sBIT chunk
+
+    Chunk types need not be official PNG chunks at all.
+    Non-standard chunks can be created.
+    """
+
+    # Convert options to chunks in the args.chunk list
+    if args.gamma:
+        v = int(round(1e5 * args.gamma))
+        bs = io.BytesIO(struct.pack(">I", v))
+        args.chunk.insert(0, Chunk(b"gAMA", bs))
+    if args.sigbit:
+        v = struct.pack("%dB" % len(args.sigbit), *args.sigbit)
+        bs = io.BytesIO(v)
+        args.chunk.insert(0, Chunk(b"sBIT", bs))
+    if args.iccprofile:
+        # http://www.w3.org/TR/PNG/#11iCCP
+        v = b"a color profile\x00\x00" + zlib.compress(args.iccprofile.read())
+        bs = io.BytesIO(v)
+        args.chunk.insert(0, Chunk(b"iCCP", bs))
+    if args.transparent:
+        # https://www.w3.org/TR/2003/REC-PNG-20031110/#11tRNS
+        v = struct.pack(">%dH" % len(args.transparent), *args.transparent)
+        bs = io.BytesIO(v)
+        args.chunk.insert(0, Chunk(b"tRNS", bs))
+    if args.background:
+        # https://www.w3.org/TR/2003/REC-PNG-20031110/#11bKGD
+        v = struct.pack(">%dH" % len(args.background), *args.background)
+        bs = io.BytesIO(v)
+        args.chunk.insert(0, Chunk(b"bKGD", bs))
+    if args.physical:
+        # https://www.w3.org/TR/PNG/#11pHYs
+        numbers = re.findall(r"(\d+\.?\d*)", args.physical)
+        if len(numbers) not in {1, 2}:
+            raise ArgumentError("One or two numbers are required for --physical")
+        xppu = float(numbers[0])
+        if len(numbers) == 1:
+            yppu = xppu
+        else:
+            yppu = float(numbers[1])
+
+        unit_spec = 0
+        if args.physical.endswith("dpi"):
+            # Convert from DPI to Pixels Per Metre
+            # 1 inch is 0.0254 metres
+            l = 0.0254
+            xppu /= l
+            yppu /= l
+            unit_spec = 1
+        elif args.physical.endswith("ppm"):
+            unit_spec = 1
+
+        v = struct.pack("!LLB", round(xppu), round(yppu), unit_spec)
+        bs = io.BytesIO(v)
+        args.chunk.insert(0, Chunk(b"pHYs", bs))
+
+    # Create:
+    # - a set of chunks to delete
+    # - a dict of chunks to replace
+    # - a list of chunk to add
+
+    delete = set(args.delete)
+    # The set of chunks to replace are those where the specification says
+    # that there should be at most one of them.
+    replacing = set([b"gAMA", b"pHYs", b"sBIT", b"PLTE", b"tRNS", b"sPLT", b"IHDR"])
+    replace = dict()
+    add = []
+
+    for chunk in args.chunk:
+        if chunk.type in replacing:
+            replace[chunk.type] = chunk
+        else:
+            add.append(chunk)
+
+    input = png.Reader(file=args.input)
+
+    return png.write_chunks(out, edit_chunks(input.chunks(), delete, replace, add))
+
+
+def edit_chunks(chunks, delete, replace, add):
+    """
+    Iterate over chunks, yielding edited chunks.
+    Subtle: the new chunks have to have their contents .read().
+    """
+    for type, v in chunks:
+        if type in delete:
+            continue
+        if type in replace:
+            yield type, replace[type].content.read()
+            del replace[type]
+            continue
+
+        if b"IDAT" <= type <= b"IDAT" and replace:
+            # If there are any chunks on the replace list by
+            # the time we reach IDAT, add then all now.
+            # put them all on the add list.
+            for chunk in replace.values():
+                yield chunk.type, chunk.content.read()
+            replace = dict()
+
+        if b"IDAT" <= type <= b"IDAT" and add:
+            # We reached IDAT; add all remaining chunks now.
+            for chunk in add:
+                yield chunk.type, chunk.content.read()
+            add = []
+
+        yield type, v
+
+
+def chunk_name(s):
+    """
+    Type check a chunk name option value.
+    """
+
+    # See https://www.w3.org/TR/2003/REC-PNG-20031110/#table51
+    valid = len(s) == 4 and set(s) <= set(string.ascii_letters)
+    if not valid:
+        raise ValueError("Chunk name must be 4 ASCII letters")
+    return s.encode("ascii")
+
+
+def comma_list(s):
+    """
+    Convert s, a command separated list of whole numbers,
+    into a sequence of int.
+    """
+
+    return tuple(int(v) for v in s.split(","))
+
+
+def hex_color(s):
+    """
+    Type check and convert a hex color.
+    """
+
+    if s.startswith("#"):
+        s = s[1:]
+    valid = len(s) in [1, 2, 3, 4, 6, 12] and set(s) <= set(string.hexdigits)
+    if not valid:
+        raise ValueError("colour must be 1,2,3,4,6, or 12 hex-digits")
+
+    # For the 4-bit RGB, expand to 8-bit, by repeating digits.
+    if len(s) == 3:
+        s = "".join(c + c for c in s)
+
+    if len(s) in [1, 2, 4]:
+        # Single grey value.
+        return (int(s, 16),)
+
+    if len(s) in [6, 12]:
+        w = len(s) // 3
+        return tuple(int(s[i : i + w], 16) for i in range(0, len(s), w))
+
+
+def main(argv=None):
+    if argv is None:
+        argv = sys.argv
+
+    argv = argv[1:]
+
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--gamma", type=float, help="Gamma value for gAMA chunk")
+    parser.add_argument(
+        "--physical",
+        type=str,
+        metavar="x[,y][dpi|ppm]",
+        help="specify intended pixel size or aspect ratio",
+    )
+    parser.add_argument(
+        "--sigbit",
+        type=comma_list,
+        metavar="D[,D[,D[,D]]]",
+        help="Number of significant bits in each channel",
+    )
+    parser.add_argument(
+        "--iccprofile",
+        metavar="file.iccp",
+        type=argparse.FileType("rb"),
+        help="add an ICC Profile from a file",
+    )
+    parser.add_argument(
+        "--transparent",
+        type=hex_color,
+        metavar="#RRGGBB",
+        help="Specify the colour that is transparent (tRNS chunk)",
+    )
+    parser.add_argument(
+        "--background",
+        type=hex_color,
+        metavar="#RRGGBB",
+        help="background colour for bKGD chunk",
+    )
+    parser.add_argument(
+        "--delete",
+        action="append",
+        default=[],
+        type=chunk_name,
+        help="delete the chunk",
+    )
+    parser.add_argument(
+        "--chunk",
+        action="append",
+        nargs=2,
+        default=[],
+        type=str,
+        help="insert chunk, taking contents from file",
+    )
+    parser.add_argument(
+        "input", nargs="?", default="-", type=png.cli_open, metavar="PNG"
+    )
+
+    args = parser.parse_args(argv)
+
+    # Reprocess the chunk arguments, converting each pair into a Chunk.
+    args.chunk = [
+        Chunk(chunk_name(type), open(path, "rb")) for type, path in args.chunk
+    ]
+
+    return process(png.binary_stdout(), args)
+
+
+if __name__ == "__main__":
+    main()

Backend/venv/bin/pricolpng

@@ -0,0 +1,81 @@
+#!/home/gnx/Desktop/Hotel-Booking/Backend/venv/bin/python3
+
+# http://www.python.org/doc/2.4.4/lib/module-itertools.html
+import itertools
+import sys
+
+import png
+
+Description = """Join PNG images in a column top-to-bottom."""
+
+
+class FormatError(Exception):
+    """
+    Some problem with the image format.
+    """
+
+
+def join_col(out, l):
+    """
+    Join the list of images.
+    All input images must be same width and
+    have the same number of channels.
+    They are joined top-to-bottom.
+    `out` is the (open file) destination for the output image.
+    `l` should be a list of open files (the input image files).
+    """
+
+    image = 0
+    stream = 0
+
+    # When the first image is read, this will be the reference width,
+    # which must be the same for all images.
+    width = None
+    # Total height (accumulated as images are read).
+    height = 0
+    # Accumulated rows.
+    rows = []
+
+    for f in l:
+        stream += 1
+        while True:
+            im = png.Reader(file=f)
+            try:
+                im.preamble()
+            except EOFError:
+                break
+            image += 1
+
+            if not width:
+                width = im.width
+            elif width != im.width:
+                raise FormatError('Image %d in stream %d has width %d; does not match %d.' %
+                  (image, stream, im.width, width))
+
+            height += im.height
+            # Various bugs here because different numbers of channels and depths go wrong.
+            w, h, p, info = im.asDirect()
+            rows.extend(p)
+
+    # Alarmingly re-use the last info object.
+    tinfo = dict(info)
+    del tinfo['size']
+    w = png.Writer(width, height, **tinfo)
+
+    w.write(out, rows)
+
+
+def main(argv):
+    import argparse
+
+    parser = argparse.ArgumentParser(description=Description)
+    parser.add_argument(
+        "input", nargs="*", default="-", type=png.cli_open, metavar="PNG"
+    )
+
+    args = parser.parse_args()
+
+    return join_col(png.binary_stdout(), args.input)
+
+if __name__ == '__main__':
+    main(sys.argv)

Backend/venv/bin/priditherpng

@@ -0,0 +1,254 @@
+#!/home/gnx/Desktop/Hotel-Booking/Backend/venv/bin/python3
+
+# pipdither
+# Error Diffusing image dithering.
+# Now with serpentine scanning.
+
+# See http://www.efg2.com/Lab/Library/ImageProcessing/DHALF.TXT
+
+# http://www.python.org/doc/2.4.4/lib/module-bisect.html
+from bisect import bisect_left
+
+
+import png
+
+
+def dither(
+    out,
+    input,
+    bitdepth=1,
+    linear=False,
+    defaultgamma=1.0,
+    targetgamma=None,
+    cutoff=0.5,  # see :cutoff:default
+):
+    """Dither the input PNG `inp` into an image with a smaller bit depth
+    and write the result image onto `out`.  `bitdepth` specifies the bit
+    depth of the new image.
+
+    Normally the source image gamma is honoured (the image is
+    converted into a linear light space before being dithered), but
+    if the `linear` argument is true then the image is treated as
+    being linear already: no gamma conversion is done (this is
+    quicker, and if you don't care much about accuracy, it won't
+    matter much).
+
+    Images with no gamma indication (no ``gAMA`` chunk) are normally
+    treated as linear (gamma = 1.0), but often it can be better
+    to assume a different gamma value: For example continuous tone
+    photographs intended for presentation on the web often carry
+    an implicit assumption of being encoded with a gamma of about
+    0.45 (because that's what you get if you just "blat the pixels"
+    onto a PC framebuffer), so ``defaultgamma=0.45`` might be a
+    good idea.  `defaultgamma` does not override a gamma value
+    specified in the file itself: It is only used when the file
+    does not specify a gamma.
+
+    If you (pointlessly) specify both `linear` and `defaultgamma`,
+    `linear` wins.
+
+    The gamma of the output image is, by default, the same as the input
+    image.  The `targetgamma` argument can be used to specify a
+    different gamma for the output image.  This effectively recodes the
+    image to a different gamma, dithering as we go.  The gamma specified
+    is the exponent used to encode the output file (and appears in the
+    output PNG's ``gAMA`` chunk); it is usually less than 1.
+
+    """
+
+    # Encoding is what happened when the PNG was made (and also what
+    # happens when we output the PNG).  Decoding is what we do to the
+    # source PNG in order to process it.
+
+    # The dithering algorithm is not completely general; it
+    # can only do bit depth reduction, not arbitrary palette changes.
+    import operator
+
+    maxval = 2 ** bitdepth - 1
+    r = png.Reader(file=input)
+
+    _, _, pixels, info = r.asDirect()
+    planes = info["planes"]
+    # :todo: make an Exception
+    assert planes == 1
+    width = info["size"][0]
+    sourcemaxval = 2 ** info["bitdepth"] - 1
+
+    if linear:
+        gamma = 1
+    else:
+        gamma = info.get("gamma") or defaultgamma
+
+    # Calculate an effective gamma for input and output;
+    # then build tables using those.
+
+    # `gamma` (whether it was obtained from the input file or an
+    # assumed value) is the encoding gamma.
+    # We need the decoding gamma, which is the reciprocal.
+    decode = 1.0 / gamma
+
+    # `targetdecode` is the assumed gamma that is going to be used
+    # to decoding the target PNG.
+    # Note that even though we will _encode_ the target PNG we
+    # still need the decoding gamma, because
+    # the table we use maps from PNG pixel value to linear light level.
+    if targetgamma is None:
+        targetdecode = decode
+    else:
+        targetdecode = 1.0 / targetgamma
+
+    incode = build_decode_table(sourcemaxval, decode)
+
+    # For encoding, we still build a decode table, because we
+    # use it inverted (searching with bisect).
+    outcode = build_decode_table(maxval, targetdecode)
+
+    # The table used for choosing output codes.  These values represent
+    # the cutoff points between two adjacent output codes.
+    # The cutoff parameter can be varied between 0 and 1 to
+    # preferentially choose lighter (when cutoff > 0.5) or
+    # darker (when cutoff < 0.5) values.
+    # :cutoff:default: The default for this used to be 0.75, but
+    # testing by drj on 2021-07-30 showed that this produces
+    # banding when dithering left-to-right gradients;
+    # test with:
+    # priforgepng grl | priditherpng | kitty icat
+    choosecode = list(zip(outcode[1:], outcode))
+    p = cutoff
+    choosecode = [x[0] * p + x[1] * (1.0 - p) for x in choosecode]
+
+    rows = repeat_header(pixels)
+    dithered_rows = run_dither(incode, choosecode, outcode, width, rows)
+    dithered_rows = remove_header(dithered_rows)
+
+    info["bitdepth"] = bitdepth
+    info["gamma"] = 1.0 / targetdecode
+    w = png.Writer(**info)
+    w.write(out, dithered_rows)
+
+
+def build_decode_table(maxval, gamma):
+    """Build a lookup table for decoding;
+    table converts from pixel values to linear space.
+    """
+
+    assert maxval == int(maxval)
+    assert maxval > 0
+
+    f = 1.0 / maxval
+    table = [f * v for v in range(maxval + 1)]
+    if gamma != 1.0:
+        table = [v ** gamma for v in table]
+    return table
+
+
+def run_dither(incode, choosecode, outcode, width, rows):
+    """
+    Run an serpentine dither.
+    Using the incode and choosecode tables.
+    """
+
+    # Errors diffused downwards (into next row)
+    ed = [0.0] * width
+    flipped = False
+    for row in rows:
+        # Convert to linear...
+        row = [incode[v] for v in row]
+        # Add errors...
+        row = [e + v for e, v in zip(ed, row)]
+
+        if flipped:
+            row = row[::-1]
+        targetrow = [0] * width
+
+        for i, v in enumerate(row):
+            # `it` will be the index of the chosen target colour;
+            it = bisect_left(choosecode, v)
+            targetrow[i] = it
+            t = outcode[it]
+            # err is the error that needs distributing.
+            err = v - t
+
+            # Sierra "Filter Lite" distributes          * 2
+            # as per this diagram.                    1 1
+            ef = err * 0.5
+            # :todo: consider making rows one wider at each end and
+            # removing "if"s
+            if i + 1 < width:
+                row[i + 1] += ef
+            ef *= 0.5
+            ed[i] = ef
+            if i:
+                ed[i - 1] += ef
+
+        if flipped:
+            ed = ed[::-1]
+            targetrow = targetrow[::-1]
+        yield targetrow
+        flipped = not flipped
+
+
+WARMUP_ROWS = 32
+
+
+def repeat_header(rows):
+    """Repeat the first row, to "warm up" the error register."""
+    for row in rows:
+        yield row
+        for _ in range(WARMUP_ROWS):
+            yield row
+        break
+    yield from rows
+
+
+def remove_header(rows):
+    """Remove the same number of rows that repeat_header added."""
+
+    for _ in range(WARMUP_ROWS):
+        next(rows)
+    yield from rows
+
+
+def main(argv=None):
+    import sys
+
+    # https://docs.python.org/3.5/library/argparse.html
+    import argparse
+
+    parser = argparse.ArgumentParser()
+
+    if argv is None:
+        argv = sys.argv
+
+    progname, *args = argv
+
+    parser.add_argument("--bitdepth", type=int, default=1, help="bitdepth of output")
+    parser.add_argument(
+        "--cutoff",
+        type=float,
+        default=0.5,
+        help="cutoff to select adjacent output values",
+    )
+    parser.add_argument(
+        "--defaultgamma",
+        type=float,
+        default=1.0,
+        help="gamma value to use when no gamma in input",
+    )
+    parser.add_argument("--linear", action="store_true", help="force linear input")
+    parser.add_argument(
+        "--targetgamma",
+        type=float,
+        help="gamma to use in output (target), defaults to input gamma",
+    )
+    parser.add_argument(
+        "input", nargs="?", default="-", type=png.cli_open, metavar="PNG"
+    )
+
+    ns = parser.parse_args(args)
+
+    return dither(png.binary_stdout(), **vars(ns))
+
+
+if __name__ == "__main__":
+    main()

Backend/venv/bin/priforgepng

@@ -0,0 +1,275 @@
+#!/home/gnx/Desktop/Hotel-Booking/Backend/venv/bin/python3
+# priforgepng
+
+"""Forge PNG image from raw computation."""
+
+from array import array
+from fractions import Fraction
+
+import argparse
+import re
+import sys
+
+import png
+
+
+def gen_glr(x):
+    """Gradient Left to Right"""
+    return x
+
+
+def gen_grl(x):
+    """Gradient Right to Left"""
+    return 1 - x
+
+
+def gen_gtb(x, y):
+    """Gradient Top to Bottom"""
+    return y
+
+
+def gen_gbt(x, y):
+    """Gradient Bottom to Top"""
+    return 1.0 - y
+
+
+def gen_rtl(x, y):
+    """Radial gradient, centred at Top-Left"""
+    return max(1 - (float(x) ** 2 + float(y) ** 2) ** 0.5, 0.0)
+
+
+def gen_rctr(x, y):
+    """Radial gradient, centred at Centre"""
+    return gen_rtl(float(x) - 0.5, float(y) - 0.5)
+
+
+def gen_rtr(x, y):
+    """Radial gradient, centred at Top-Right"""
+    return gen_rtl(1.0 - float(x), y)
+
+
+def gen_rbl(x, y):
+    """Radial gradient, centred at Bottom-Left"""
+    return gen_rtl(x, 1.0 - float(y))
+
+
+def gen_rbr(x, y):
+    """Radial gradient, centred at Bottom-Right"""
+    return gen_rtl(1.0 - float(x), 1.0 - float(y))
+
+
+def stripe(x, n):
+    return int(x * n) & 1
+
+
+def gen_vs2(x):
+    """2 Vertical Stripes"""
+    return stripe(x, 2)
+
+
+def gen_vs4(x):
+    """4 Vertical Stripes"""
+    return stripe(x, 4)
+
+
+def gen_vs10(x):
+    """10 Vertical Stripes"""
+    return stripe(x, 10)
+
+
+def gen_hs2(x, y):
+    """2 Horizontal Stripes"""
+    return stripe(float(y), 2)
+
+
+def gen_hs4(x, y):
+    """4 Horizontal Stripes"""
+    return stripe(float(y), 4)
+
+
+def gen_hs10(x, y):
+    """10 Horizontal Stripes"""
+    return stripe(float(y), 10)
+
+
+def gen_slr(x, y):
+    """10 diagonal stripes, rising from Left to Right"""
+    return stripe(x + y, 10)
+
+
+def gen_srl(x, y):
+    """10 diagonal stripes, rising from Right to Left"""
+    return stripe(1 + x - y, 10)
+
+
+def checker(x, y, n):
+    return stripe(x, n) ^ stripe(y, n)
+
+
+def gen_ck8(x, y):
+    """8 by 8 checkerboard"""
+    return checker(x, y, 8)
+
+
+def gen_ck15(x, y):
+    """15 by 15 checkerboard"""
+    return checker(x, y, 15)
+
+
+def gen_zero(x):
+    """All zero (black)"""
+    return 0
+
+
+def gen_one(x):
+    """All one (white)"""
+    return 1
+
+
+def yield_fun_rows(size, bitdepth, pattern):
+    """
+    Create a single channel (monochrome) test pattern.
+    Yield each row in turn.
+    """
+
+    width, height = size
+
+    maxval = 2 ** bitdepth - 1
+    if maxval > 255:
+        typecode = "H"
+    else:
+        typecode = "B"
+    pfun = pattern_function(pattern)
+
+    # The coordinates are an integer + 0.5,
+    # effectively sampling each pixel at its centre.
+    # This is morally better, and produces all 256 sample values
+    # in a 256-pixel wide gradient.
+
+    # We make a list of x coordinates here and re-use it,
+    # because Fraction instances are slow to allocate.
+    xs = [Fraction(x, 2 * width) for x in range(1, 2 * width, 2)]
+
+    # The general case is a function in x and y,
+    # but if the function only takes an x argument,
+    # it's handled in a special case that is a lot faster.
+    if n_args(pfun) == 2:
+        for y in range(height):
+            a = array(typecode)
+            fy = Fraction(Fraction(y + 0.5), height)
+            for fx in xs:
+                a.append(int(round(maxval * pfun(fx, fy))))
+            yield a
+        return
+
+    # For functions in x only, it's a _lot_ faster
+    # to generate a single row and repeatedly yield it
+    a = array(typecode)
+    for fx in xs:
+        a.append(int(round(maxval * pfun(x=fx))))
+    for y in range(height):
+        yield a
+    return
+
+
+def generate(args):
+    """
+    Create a PNG test image and write the file to stdout.
+
+    `args` should be an argparse Namespace instance or similar.
+    """
+
+    size = args.size
+    bitdepth = args.depth
+
+    out = png.binary_stdout()
+
+    for pattern in args.pattern:
+        rows = yield_fun_rows(size, bitdepth, pattern)
+        writer = png.Writer(
+            size[0], size[1], bitdepth=bitdepth, greyscale=True, alpha=False
+        )
+        writer.write(out, rows)
+
+
+def n_args(fun):
+    """Number of arguments in fun's argument list."""
+    return fun.__code__.co_argcount
+
+
+def pattern_function(pattern):
+    """From `pattern`, a string,
+    return the function for that pattern.
+    """
+
+    lpat = pattern.lower()
+    for name, fun in globals().items():
+        parts = name.split("_")
+        if parts[0] != "gen":
+            continue
+        if parts[1] == lpat:
+            return fun
+
+
+def patterns():
+    """
+    List the patterns.
+    """
+
+    for name, fun in globals().items():
+        parts = name.split("_")
+        if parts[0] == "gen":
+            yield parts[1], fun.__doc__
+
+
+def dimensions(s):
+    """
+    Typecheck the --size option, which should be
+    one or two comma separated numbers.
+    Example: "64,40".
+    """
+
+    tupl = re.findall(r"\d+", s)
+    if len(tupl) not in (1, 2):
+        raise ValueError("%r should be width or width,height" % s)
+    if len(tupl) == 1:
+        tupl *= 2
+    assert len(tupl) == 2
+    return list(map(int, tupl))
+
+
+def main(argv=None):
+    if argv is None:
+        argv = sys.argv
+    parser = argparse.ArgumentParser(description="Forge greyscale PNG patterns")
+
+    parser.add_argument(
+        "-l", "--list", action="store_true", help="print list of patterns and exit"
+    )
+    parser.add_argument(
+        "-d", "--depth", default=8, type=int, metavar="N", help="N bits per pixel"
+    )
+    parser.add_argument(
+        "-s",
+        "--size",
+        default=[256, 256],
+        type=dimensions,
+        metavar="w[,h]",
+        help="width and height of the image in pixels",
+    )
+    parser.add_argument("pattern", nargs="*", help="name of pattern")
+
+    args = parser.parse_args(argv[1:])
+
+    if args.list:
+        for name, doc in sorted(patterns()):
+            print(name, doc, sep="\t")
+        return
+
+    if not args.pattern:
+        parser.error("--list or pattern is required")
+    return generate(args)
+
+
+if __name__ == "__main__":
+    main()

Backend/venv/bin/prigreypng

@@ -0,0 +1,72 @@
+#!/home/gnx/Desktop/Hotel-Booking/Backend/venv/bin/python3
+
+# prigreypng
+
+# Convert image to grey (L, or LA), but only if that involves no colour change.
+
+import argparse
+import array
+
+
+import png
+
+
+def as_grey(out, inp):
+    """
+    Convert image to greyscale, but only when no colour change.
+    This works by using the input G channel (green) as
+    the output L channel (luminance) and
+    checking that every pixel is grey as we go.
+    A non-grey pixel will raise an error.
+    """
+
+    r = png.Reader(file=inp)
+    _, _, rows, info = r.asDirect()
+    if info["greyscale"]:
+        w = png.Writer(**info)
+        return w.write(out, rows)
+
+    planes = info["planes"]
+    targetplanes = planes - 2
+    alpha = info["alpha"]
+    width, height = info["size"]
+    typecode = "BH"[info["bitdepth"] > 8]
+
+    # Values per target row
+    vpr = width * targetplanes
+
+    def iterasgrey():
+        for i, row in enumerate(rows):
+            row = array.array(typecode, row)
+            targetrow = array.array(typecode, [0] * vpr)
+            # Copy G (and possibly A) channel.
+            green = row[0::planes]
+            if alpha:
+                targetrow[0::2] = green
+                targetrow[1::2] = row[3::4]
+            else:
+                targetrow = green
+            # Check R and B channel match.
+            if green != row[0::planes] or green != row[2::planes]:
+                raise ValueError("Row %i contains non-grey pixel." % i)
+            yield targetrow
+
+    info["greyscale"] = True
+    del info["planes"]
+    w = png.Writer(**info)
+    return w.write(out, iterasgrey())
+
+
+def main(argv=None):
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        "input", nargs="?", default="-", type=png.cli_open, metavar="PNG"
+    )
+    args = parser.parse_args()
+    return as_grey(png.binary_stdout(), args.input)
+
+
+if __name__ == "__main__":
+    import sys
+
+    sys.exit(main())

Backend/venv/bin/pripalpng

@@ -0,0 +1,111 @@
+#!/home/gnx/Desktop/Hotel-Booking/Backend/venv/bin/python3
+# pripalpng
+
+
+"""Convert to Palette PNG (without changing colours)"""
+
+import argparse
+import collections
+
+# https://docs.python.org/2.7/library/io.html
+import io
+import string
+import zlib
+
+# Local module.
+import png
+
+
+def make_inverse_palette(rows, channels):
+    """
+    The inverse palette maps from tuple to palette index.
+    """
+
+    palette = {}
+
+    for row in rows:
+        for pixel in png.group(row, channels):
+            if pixel in palette:
+                continue
+            palette[pixel] = len(palette)
+    return palette
+
+
+def palette_convert(out, inp, palette_file):
+    """
+    Convert PNG image in `inp` to use a palette, colour type 3,
+    and write converted image to `out`.
+
+    `palette_file` is a file descriptor for the palette to use.
+
+    If `palette_file` is None, then `inp` is used as the palette.
+    """
+
+    if palette_file is None:
+        inp, palette_file = palette_file, inp
+
+    reader = png.Reader(file=palette_file)
+    w, h, rows, info = asRGBorA8(reader)
+    channels = info["planes"]
+    if not inp:
+        rows = list(rows)
+
+    palette_map = make_inverse_palette(rows, channels)
+
+    if inp:
+        reader = png.Reader(file=inp)
+        w, h, rows, info = asRGBorA8(reader)
+        channels = info["planes"]
+
+    # Default for colours not in palette is to use last entry.
+    last = len(palette_map) - 1
+
+    def map_pixel(p):
+        return palette_map.get(p, last)
+
+    def convert_rows():
+        for row in rows:
+            yield [map_pixel(p) for p in png.group(row, channels)]
+
+    # Make a palette by sorting the pixels according to their index.
+    palette = sorted(palette_map.keys(), key=palette_map.get)
+    pal_info = dict(size=info["size"], palette=palette)
+
+    w = png.Writer(**pal_info)
+    w.write(out, convert_rows())
+
+
+def asRGBorA8(reader):
+    """
+    Return (width, height, rows, info) converting to RGB,
+    or RGBA if original has an alpha channel.
+    """
+    _, _, _, info = reader.read()
+    if info["alpha"]:
+        return reader.asRGBA8()
+    else:
+        return reader.asRGB8()
+
+
+def main(argv=None):
+    import sys
+    import re
+
+    if argv is None:
+        argv = sys.argv
+
+    argv = argv[1:]
+
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument("--palette", type=png.cli_open)
+    parser.add_argument(
+        "input", nargs="?", default="-", type=png.cli_open, metavar="PNG"
+    )
+
+    args = parser.parse_args(argv)
+
+    palette_convert(png.binary_stdout(), args.input, args.palette)
+
+
+if __name__ == "__main__":
+    main()

Backend/venv/bin/pripamtopng

@@ -0,0 +1,355 @@
+#!/home/gnx/Desktop/Hotel-Booking/Backend/venv/bin/python3
+
+# pripamtopng
+#
+# Python Raster Image PAM to PNG
+
+import array
+import struct
+import sys
+
+import png
+
+Description = """Convert NetPBM PAM/PNM format files to PNG."""
+
+
+def read_pam_header(infile):
+    """
+    Read (the rest of a) PAM header.
+    `infile` should be positioned immediately after the initial 'P7' line
+    (at the beginning of the second line).
+    Returns are as for `read_pnm_header`.
+    """
+
+    # Unlike PBM, PGM, and PPM, we can read the header a line at a time.
+    header = dict()
+    while True:
+        line = infile.readline().strip()
+        if line == b"ENDHDR":
+            break
+        if not line:
+            raise EOFError("PAM ended prematurely")
+        if line[0] == b"#":
+            continue
+        line = line.split(None, 1)
+        key = line[0]
+        if key not in header:
+            header[key] = line[1]
+        else:
+            header[key] += b" " + line[1]
+
+    required = [b"WIDTH", b"HEIGHT", b"DEPTH", b"MAXVAL"]
+    required_str = b", ".join(required).decode("ascii")
+    result = []
+    for token in required:
+        if token not in header:
+            raise png.Error("PAM file must specify " + required_str)
+        try:
+            x = int(header[token])
+        except ValueError:
+            raise png.Error(required_str + " must all be valid integers")
+        if x <= 0:
+            raise png.Error(required_str + " must all be positive integers")
+        result.append(x)
+
+    return (b"P7",) + tuple(result)
+
+
+def read_pnm_header(infile):
+    """
+    Read a PNM header, returning (format,width,height,depth,maxval).
+    Also reads a PAM header (by using a helper function).
+    `width` and `height` are in pixels.
+    `depth` is the number of channels in the image;
+    for PBM and PGM it is synthesized as 1, for PPM as 3;
+    for PAM images it is read from the header.
+    `maxval` is synthesized (as 1) for PBM images.
+    """
+
+    # Generally, see http://netpbm.sourceforge.net/doc/ppm.html
+    # and http://netpbm.sourceforge.net/doc/pam.html
+
+    # Technically 'P7' must be followed by a newline,
+    # so by using rstrip() we are being liberal in what we accept.
+    # I think this is acceptable.
+    magic = infile.read(3).rstrip()
+    if magic == b"P7":
+        # PAM header parsing is completely different.
+        return read_pam_header(infile)
+
+    # Expected number of tokens in header (3 for P4, 4 for P6)
+    expected = 4
+    pbm = (b"P1", b"P4")
+    if magic in pbm:
+        expected = 3
+    header = [magic]
+
+    # We must read the rest of the header byte by byte because
+    # the final whitespace character may not be a newline.
+    # Of course all PNM files in the wild use a newline at this point,
+    # but we are strong and so we avoid
+    # the temptation to use readline.
+    bs = bytearray()
+    backs = bytearray()
+
+    def next():
+        if backs:
+            c = bytes(backs[0:1])
+            del backs[0]
+        else:
+            c = infile.read(1)
+            if not c:
+                raise png.Error("premature EOF reading PNM header")
+        bs.extend(c)
+        return c
+
+    def backup():
+        """Push last byte of token onto front of backs."""
+        backs.insert(0, bs[-1])
+        del bs[-1]
+
+    def ignore():
+        del bs[:]
+
+    def tokens():
+        ls = lexInit
+        while True:
+            token, ls = ls()
+            if token:
+                yield token
+
+    def lexInit():
+        c = next()
+        # Skip comments
+        if b"#" <= c <= b"#":
+            while c not in b"\n\r":
+                c = next()
+            ignore()
+            return None, lexInit
+        # Skip whitespace (that precedes a token)
+        if c.isspace():
+            ignore()
+            return None, lexInit
+        if not c.isdigit():
+            raise png.Error("unexpected byte %r found in header" % c)
+        return None, lexNumber
+
+    def lexNumber():
+        # According to the specification it is legal to have comments
+        # that appear in the middle of a token.
+        # I've never seen it; and,
+        # it's a bit awkward to code good lexers in Python (no goto).
+        # So we break on such cases.
+        c = next()
+        while c.isdigit():
+            c = next()
+        backup()
+        token = bs[:]
+        ignore()
+        return token, lexInit
+
+    for token in tokens():
+        # All "tokens" are decimal integers, so convert them here.
+        header.append(int(token))
+        if len(header) == expected:
+            break
+
+    final = next()
+    if not final.isspace():
+        raise png.Error("expected header to end with whitespace, not %r" % final)
+
+    if magic in pbm:
+        # synthesize a MAXVAL
+        header.append(1)
+    depth = (1, 3)[magic == b"P6"]
+    return header[0], header[1], header[2], depth, header[3]
+
+
+def convert_pnm_plain(w, infile, outfile):
+    """
+    Convert a plain PNM file containing raw pixel data into
+    a PNG file with the parameters set in the writer object.
+    Works for plain PGM formats.
+    """
+
+    # See convert_pnm_binary for the corresponding function for
+    # binary PNM formats.
+
+    rows = scan_rows_from_file_plain(infile, w.width, w.height, w.planes)
+    w.write(outfile, rows)
+
+
+def scan_rows_from_file_plain(infile, width, height, planes):
+    """
+    Generate a sequence of rows from the input file `infile`.
+    The input file should be in a "Netpbm-like" plain format.
+    The input file should be positioned at the beginning of the
+    first value (that is, immediately after the header).
+    The number of pixels to read is taken from
+    the image dimensions (`width`, `height`, `planes`).
+
+    Each row is yielded as a single sequence of values.
+    """
+
+    # Values per row
+    vpr = width * planes
+
+    values = []
+    rows_output = 0
+
+    # The core problem is that input lines (text lines) may not
+    # correspond with pixel rows. We use two nested loops.
+    # The outer loop reads the input one text line at a time;
+    # this will contain a whole number of values, which are
+    # added to the `values` list.
+    # The inner loop strips the first `vpr` values from the
+    # list, until there aren't enough.
+    # Note we can't tell how many iterations the inner loop will
+    # run for, it could be 0 (if not enough values were read to
+    # make a whole pixel row) or many (if the entire image were
+    # on one input line), or somewhere in between.
+    # In PNM there is in general no requirement to have
+    # correspondence between text lines and pixel rows.
+
+    for inp in infile:
+        values.extend(map(int, inp.split()))
+        while len(values) >= vpr:
+            yield values[:vpr]
+            del values[:vpr]
+            rows_output += 1
+            if rows_output >= height:
+                # Diagnostic here if there are spare values?
+                return
+    # Diagnostic here for early EOF?
+
+
+def convert_pnm_binary(w, infile, outfile):
+    """
+    Convert a PNM file containing raw pixel data into
+    a PNG file with the parameters set in the writer object.
+    Works for (binary) PGM, PPM, and PAM formats.
+    """
+
+    rows = scan_rows_from_file(infile, w.width, w.height, w.planes, w.bitdepth)
+    w.write(outfile, rows)
+
+
+def scan_rows_from_file(infile, width, height, planes, bitdepth):
+    """
+    Generate a sequence of rows from the input file `infile`.
+    The input file should be in a "Netpbm-like" binary format.
+    The input file should be positioned at the beginning of the first pixel.
+    The number of pixels to read is taken from
+    the image dimensions (`width`, `height`, `planes`);
+    the number of bytes per value is implied by `bitdepth`.
+    Each row is yielded as a single sequence of values.
+    """
+
+    # Values per row
+    vpr = width * planes
+    # Bytes per row
+    bpr = vpr
+    if bitdepth > 8:
+        assert bitdepth == 16
+        bpr *= 2
+        fmt = ">%dH" % vpr
+
+        def line():
+            return array.array("H", struct.unpack(fmt, infile.read(bpr)))
+
+    else:
+
+        def line():
+            return array.array("B", infile.read(bpr))
+
+    for y in range(height):
+        yield line()
+
+
+def parse_args(args):
+    """
+    Create a parser and parse the command line arguments.
+    """
+    from argparse import ArgumentParser
+
+    parser = ArgumentParser(description=Description)
+    version = "%(prog)s " + png.__version__
+    parser.add_argument("--version", action="version", version=version)
+    parser.add_argument(
+        "-c",
+        "--compression",
+        type=int,
+        metavar="level",
+        help="zlib compression level (0-9)",
+    )
+    parser.add_argument(
+        "input",
+        nargs="?",
+        default="-",
+        type=png.cli_open,
+        metavar="PAM/PNM",
+        help="input PAM/PNM file to convert",
+    )
+    args = parser.parse_args(args)
+    return args
+
+
+def main(argv=None):
+    if argv is None:
+        argv = sys.argv
+
+    args = parse_args(argv[1:])
+
+    # Prepare input and output files
+    infile = args.input
+
+    # Call after parsing, so that --version and --help work.
+    outfile = png.binary_stdout()
+
+    # Encode PNM to PNG
+    format, width, height, depth, maxval = read_pnm_header(infile)
+
+    ok_formats = (b"P2", b"P5", b"P6", b"P7")
+    if format not in ok_formats:
+        raise NotImplementedError("file format %s not supported" % format)
+
+    # The NetPBM depth (number of channels) completely
+    # determines the PNG format.
+    # Observe:
+    # - L, LA, RGB, RGBA are the 4 modes supported by PNG;
+    # - they correspond to 1, 2, 3, 4 channels respectively.
+    # We use the number of channels in the source image to
+    # determine which one we have.
+    # We ignore the NetPBM image type and the PAM TUPLTYPE.
+    greyscale = depth <= 2
+    pamalpha = depth in (2, 4)
+    supported = [2 ** x - 1 for x in range(1, 17)]
+    try:
+        mi = supported.index(maxval)
+    except ValueError:
+        raise NotImplementedError(
+            "input maxval (%s) not in supported list %s" % (maxval, str(supported))
+        )
+    bitdepth = mi + 1
+    writer = png.Writer(
+        width,
+        height,
+        greyscale=greyscale,
+        bitdepth=bitdepth,
+        alpha=pamalpha,
+        compression=args.compression,
+    )
+
+    plain = format in (b"P1", b"P2", b"P3")
+    if plain:
+        convert_pnm_plain(writer, infile, outfile)
+    else:
+        convert_pnm_binary(writer, infile, outfile)
+
+
+if __name__ == "__main__":
+    try:
+        sys.exit(main())
+    except png.Error as e:
+        print(e, file=sys.stderr)
+        sys.exit(99)

Backend/venv/bin/priplan9topng

@@ -0,0 +1,540 @@
+#!/home/gnx/Desktop/Hotel-Booking/Backend/venv/bin/python3
+
+# Imported from //depot/prj/plan9topam/master/code/plan9topam.py#4 on
+# 2009-06-15.
+
+"""Command line tool to convert from Plan 9 image format to PNG format.
+
+Plan 9 image format description:
+https://plan9.io/magic/man2html/6/image
+
+Where possible this tool will use unbuffered read() calls,
+so that when finished the file offset is exactly at the end of
+the image data.
+This is useful for Plan9 subfont files which place font metric
+data immediately after the image.
+"""
+
+# Test materials
+
+# asset/left.bit is a Plan 9 image file, a leftwards facing Glenda.
+# Other materials have to be scrounged from the internet.
+# https://plan9.io/sources/plan9/sys/games/lib/sokoban/images/cargo.bit
+
+import array
+import collections
+import io
+
+# http://www.python.org/doc/2.3.5/lib/module-itertools.html
+import itertools
+import os
+
+# http://www.python.org/doc/2.3.5/lib/module-re.html
+import re
+import struct
+
+# http://www.python.org/doc/2.3.5/lib/module-sys.html
+import sys
+
+# https://docs.python.org/3/library/tarfile.html
+import tarfile
+
+
+# https://pypi.org/project/pypng/
+import png
+
+# internal
+import prix
+
+
+class Error(Exception):
+    """Some sort of Plan 9 image error."""
+
+
+def block(s, n):
+    return zip(*[iter(s)] * n)
+
+
+def plan9_as_image(inp):
+    """Represent a Plan 9 image file as a png.Image instance, so
+    that it can be written as a PNG file.
+    Works with compressed input files and may work with uncompressed files.
+    """
+
+    # Use inp.raw if available.
+    # This avoids buffering and means that when the image is processed,
+    # the resulting input stream is cued up exactly at the end
+    # of the image.
+    inp = getattr(inp, "raw", inp)
+
+    info, blocks = plan9_open_image(inp)
+
+    rows, infodict = plan9_image_rows(blocks, info)
+
+    return png.Image(rows, infodict)
+
+
+def plan9_open_image(inp):
+    """Open a Plan9 image file (`inp` should be an already open
+    file object), and return (`info`, `blocks`) pair.
+    `info` should be a Plan9 5-tuple;
+    `blocks` is the input, and it should yield (`row`, `data`)
+    pairs (see :meth:`pixmeta`).
+    """
+
+    r = inp.read(11)
+    if r == b"compressed\n":
+        info, blocks = decompress(inp)
+    else:
+        # Since Python 3, there is a good chance that this path
+        # doesn't work.
+        info, blocks = glue(inp, r)
+
+    return info, blocks
+
+
+def glue(f, r):
+    """Return (info, stream) pair, given `r` the initial portion of
+    the metadata that has already been read from the stream `f`.
+    """
+
+    r = r + f.read(60 - len(r))
+    return (meta(r), f)
+
+
+def meta(r):
+    """Convert 60 byte bytestring `r`, the metadata from an image file.
+    Returns a 5-tuple (*chan*,*minx*,*miny*,*limx*,*limy*).
+    5-tuples may settle into lists in transit.
+
+    As per https://plan9.io/magic/man2html/6/image the metadata
+    comprises 5 words separated by blanks.
+    As it happens each word starts at an index that is a multiple of 12,
+    but this routine does not care about that.
+    """
+
+    r = r.split()
+    # :todo: raise FormatError
+    if 5 != len(r):
+        raise Error("Expected 5 space-separated words in metadata")
+    r = [r[0]] + [int(x) for x in r[1:]]
+    return r
+
+
+def bitdepthof(chan):
+    """Return the bitdepth for a Plan9 pixel format string."""
+
+    maxd = 0
+    for c in re.findall(rb"[a-z]\d*", chan):
+        if c[0] != "x":
+            maxd = max(maxd, int(c[1:]))
+    return maxd
+
+
+def maxvalof(chan):
+    """Return the netpbm MAXVAL for a Plan9 pixel format string."""
+
+    bitdepth = bitdepthof(chan)
+    return (2 ** bitdepth) - 1
+
+
+def plan9_image_rows(blocks, metadata):
+    """
+    Convert (uncompressed) Plan 9 image file to pair of (*rows*, *info*).
+    This is intended to be used by PyPNG format.
+    *info* is the image info (metadata) returned in a dictionary,
+    *rows* is an iterator that yields each row in
+    boxed row flat pixel format.
+
+    `blocks`, should be an iterator of (`row`, `data`) pairs.
+    """
+
+    chan, minx, miny, limx, limy = metadata
+    rows = limy - miny
+    width = limx - minx
+    nchans = len(re.findall(b"[a-wyz]", chan))
+    alpha = b"a" in chan
+    # Iverson's convention for the win!
+    ncolour = nchans - alpha
+    greyscale = ncolour == 1
+    bitdepth = bitdepthof(chan)
+    maxval = maxvalof(chan)
+
+    # PNG style info dict.
+    meta = dict(
+        size=(width, rows),
+        bitdepth=bitdepth,
+        greyscale=greyscale,
+        alpha=alpha,
+        planes=nchans,
+    )
+
+    arraycode = "BH"[bitdepth > 8]
+
+    return (
+        map(
+            lambda x: array.array(arraycode, itertools.chain(*x)),
+            block(unpack(blocks, rows, width, chan, maxval), width),
+        ),
+        meta,
+    )
+
+
+def unpack(f, rows, width, chan, maxval):
+    """Unpack `f` into pixels.
+    `chan` describes the pixel format using
+    the Plan9 syntax ("k8", "r8g8b8", and so on).
+    Assumes the pixel format has a total channel bit depth
+    that is either a multiple or a divisor of 8
+    (the Plan9 image specification requires this).
+    `f` should be an iterator that returns blocks of input such that
+    each block contains a whole number of pixels.
+    The return value is an iterator that yields each pixel as an n-tuple.
+    """
+
+    def mask(w):
+        """An integer, to be used as a mask, with bottom `w` bits set to 1."""
+
+        return (1 << w) - 1
+
+    def deblock(f, depth, width):
+        """A "packer" used to convert multiple bytes into single pixels.
+        `depth` is the pixel depth in bits (>= 8), `width` is the row width in
+        pixels.
+        """
+
+        w = depth // 8
+        i = 0
+        for block in f:
+            for i in range(len(block) // w):
+                p = block[w * i : w * (i + 1)]
+                i += w
+                # Convert little-endian p to integer x
+                x = 0
+                s = 1  # scale
+                for j in p:
+                    x += s * j
+                    s <<= 8
+                yield x
+
+    def bitfunge(f, depth, width):
+        """A "packer" used to convert single bytes into multiple pixels.
+        Depth is the pixel depth (< 8), width is the row width in pixels.
+        """
+
+        assert 8 / depth == 8 // depth
+
+        for block in f:
+            col = 0
+            for x in block:
+                for j in range(8 // depth):
+                    yield x >> (8 - depth)
+                    col += 1
+                    if col == width:
+                        # A row-end forces a new byte even if
+                        # we haven't consumed all of the current byte.
+                        # Effectively rows are bit-padded to make
+                        # a whole number of bytes.
+                        col = 0
+                        break
+                    x <<= depth
+
+    # number of bits in each channel
+    bits = [int(d) for d in re.findall(rb"\d+", chan)]
+    # colr of each channel
+    # (r, g, b, k for actual colours, and
+    # a, m, x for alpha, map-index, and unused)
+    colr = re.findall(b"[a-z]", chan)
+
+    depth = sum(bits)
+
+    # Select a "packer" that either:
+    # - gathers multiple bytes into a single pixel (for depth >= 8); or,
+    # - splits bytes into several pixels (for depth < 8).
+    if depth >= 8:
+        assert depth % 8 == 0
+        packer = deblock
+    else:
+        assert 8 % depth == 0
+        packer = bitfunge
+
+    for x in packer(f, depth, width):
+        # x is the pixel as an unsigned integer
+        o = []
+        # This is a bit yucky.
+        # Extract each channel from the _most_ significant part of x.
+        for b, col in zip(bits, colr):
+            v = (x >> (depth - b)) & mask(b)
+            x <<= b
+            if col != "x":
+                # scale to maxval
+                v = v * float(maxval) / mask(b)
+                v = int(v + 0.5)
+                o.append(v)
+        yield o
+
+
+def decompress(f):
+    """Decompress a Plan 9 image file.
+    The input `f` should be a binary file object that
+    is already cued past the initial 'compressed\n' string.
+    The return result is (`info`, `blocks`);
+    `info` is a 5-tuple of the Plan 9 image metadata;
+    `blocks` is an iterator that yields a (row, data) pair
+    for each block of data.
+    """
+
+    r = meta(f.read(60))
+    return r, decomprest(f, r[4])
+
+
+def decomprest(f, rows):
+    """Iterator that decompresses the rest of a file once the metadata
+    have been consumed."""
+
+    row = 0
+    while row < rows:
+        row, o = deblock(f)
+        yield o
+
+
+def deblock(f):
+    """Decompress a single block from a compressed Plan 9 image file.
+    Each block starts with 2 decimal strings of 12 bytes each.
+    Yields a sequence of (row, data) pairs where
+    `row` is the total number of rows processed
+    (according to the file format) and
+    `data` is the decompressed data for this block.
+    """
+
+    row = int(f.read(12))
+    size = int(f.read(12))
+    if not (0 <= size <= 6000):
+        raise Error("block has invalid size; not a Plan 9 image file?")
+
+    # Since each block is at most 6000 bytes we may as well read it all in
+    # one go.
+    d = f.read(size)
+    i = 0
+    o = []
+
+    while i < size:
+        x = d[i]
+        i += 1
+        if x & 0x80:
+            x = (x & 0x7F) + 1
+            lit = d[i : i + x]
+            i += x
+            o.extend(lit)
+            continue
+        # x's high-order bit is 0
+        length = (x >> 2) + 3
+        # Offset is made from bottom 2 bits of x and 8 bits of next byte.
+        #     MSByte                                 LSByte
+        #   +---------------------+-------------------------+
+        #   | - - - - - - | x1 x0 | d7 d6 d5 d4 d3 d2 d1 d0 |
+        #   +-----------------------------------------------+
+        # Had to discover by inspection which way round the bits go,
+        # because https://plan9.io/magic/man2html/6/image doesn't say.
+        # that x's 2 bits are most significant.
+        offset = (x & 3) << 8
+        offset |= d[i]
+        i += 1
+        # Note: complement operator neatly maps (0 to 1023) to (-1 to
+        # -1024).  Adding len(o) gives a (non-negative) offset into o from
+        # which to start indexing.
+        offset = ~offset + len(o)
+        if offset < 0:
+            raise Error(
+                "byte offset indexes off the begininning of "
+                "the output buffer; not a Plan 9 image file?"
+            )
+        for j in range(length):
+            o.append(o[offset + j])
+    return row, bytes(o)
+
+
+FontChar = collections.namedtuple("FontChar", "x top bottom left width")
+
+
+def font_copy(inp, image, out, control):
+    """
+    Convert a Plan 9 font (`inp`, `image`) to a series of PNG images,
+    and write them out as a tar file to the file object `out`.
+    Write a text control file out to the file object `control`.
+
+    Each valid glyph in the font becomes a single PNG image;
+    the output is a tar file of all the images.
+
+    A Plan 9 font consists of a Plan 9 image immediately
+    followed by font data.
+    The image for the font should be the `image` argument,
+    the file containing the rest of the font data should be the
+    file object `inp` which should be cued up to the start of
+    the font data that immediately follows the image.
+
+    https://plan9.io/magic/man2html/6/font
+    """
+
+    # The format is a little unusual, and isn't completely
+    # clearly documented.
+    # Each 6-byte structure (see FontChar above) defines
+    # a rectangular region of the image that is used for each
+    # glyph.
+    # The source image region that is used may be strictly
+    # smaller than the rectangle for the target glyph.
+    # This seems like a micro-optimisation.
+    # For each glyph,
+    # rows above `top` and below `bottom` will not be copied
+    # from the source (they can be assumed to be blank).
+    # No space is saved in the source image, since the rows must
+    # be present.
+    # `x` is always non-decreasing, so the glyphs appear strictly
+    # left-to-image in the source image.
+    # The x of the next glyph is used to
+    # infer the width of the source rectangle.
+    # `top` and `bottom` give the y-coordinate of the top- and
+    # bottom- sides of the rectangle in both source and targets.
+    # `left` is the x-coordinate of the left-side of the
+    # rectangle in the target glyph. (equivalently, the amount
+    # of padding that should be added on the left).
+    # `width` is the advance-width of the glyph; by convention
+    # it is 0 for an undefined glyph.
+
+    name = getattr(inp, "name", "*subfont*name*not*supplied*")
+
+    header = inp.read(36)
+    n, height, ascent = [int(x) for x in header.split()]
+    print("baseline", name, ascent, file=control, sep=",")
+
+    chs = []
+    for i in range(n + 1):
+        bs = inp.read(6)
+        ch = FontChar(*struct.unpack("<HBBBB", bs))
+        chs.append(ch)
+
+    tar = tarfile.open(mode="w|", fileobj=out)
+
+    # Start at 0, increment for every image output
+    # (recall that not every input glyph has an output image)
+    output_index = 0
+    for i in range(n):
+        ch = chs[i]
+        if ch.width == 0:
+            continue
+
+        print("png", "index", output_index, "glyph", name, i, file=control, sep=",")
+
+        info = dict(image.info, size=(ch.width, height))
+        target = new_image(info)
+
+        source_width = chs[i + 1].x - ch.x
+        rect = ((ch.left, ch.top), (ch.left + source_width, ch.bottom))
+        image_draw(target, rect, image, (ch.x, ch.top))
+
+        # :todo: add source, glyph, and baseline data here (as a
+        # private tag?)
+        o = io.BytesIO()
+        target.write(o)
+        binary_size = o.tell()
+        o.seek(0)
+
+        tarinfo = tar.gettarinfo(arcname="%s/glyph%d.png" % (name, i), fileobj=inp)
+        tarinfo.size = binary_size
+        tar.addfile(tarinfo, fileobj=o)
+
+        output_index += 1
+
+    tar.close()
+
+
+def new_image(info):
+    """Return a fresh png.Image instance."""
+
+    width, height = info["size"]
+    vpr = width * info["planes"]
+    row = lambda: [0] * vpr
+    rows = [row() for _ in range(height)]
+    return png.Image(rows, info)
+
+
+def image_draw(target, rect, source, point):
+    """The point `point` in the source image is aligned with the
+    top-left of rect in the target image, and then the rectangle
+    in target is replaced with the pixels from `source`.
+
+    This routine assumes that both source and target can have
+    their rows objects indexed (not streamed).
+    """
+
+    # :todo: there is no attempt to do clipping or channel or
+    # colour conversion. But maybe later?
+
+    if target.info["planes"] != source.info["planes"]:
+        raise NotImplementedError(
+            "source and target must have the same number of planes"
+        )
+
+    if target.info["bitdepth"] != source.info["bitdepth"]:
+        raise NotImplementedError("source and target must have the same bitdepth")
+
+    tl, br = rect
+    left, top = tl
+    right, bottom = br
+    height = bottom - top
+
+    planes = source.info["planes"]
+
+    vpr = (right - left) * planes
+    source_left, source_top = point
+
+    source_l = source_left * planes
+    source_r = source_l + vpr
+
+    target_l = left * planes
+    target_r = target_l + vpr
+
+    for y in range(height):
+        row = source.rows[y + source_top]
+        row = row[source_l:source_r]
+        target.rows[top + y][target_l:target_r] = row
+
+
+def main(argv=None):
+    import argparse
+
+    parser = argparse.ArgumentParser(description="Convert Plan9 image to PNG")
+    parser.add_argument(
+        "input",
+        nargs="?",
+        default="-",
+        type=png.cli_open,
+        metavar="image",
+        help="image file in Plan 9 format",
+    )
+    parser.add_argument(
+        "--control",
+        default=os.path.devnull,
+        type=argparse.FileType("w"),
+        metavar="ControlCSV",
+        help="(when using --font) write a control CSV file to named file",
+    )
+    parser.add_argument(
+        "--font",
+        action="store_true",
+        help="process as Plan 9 subfont: output a tar file of PNGs",
+    )
+
+    args = parser.parse_args()
+
+    image = plan9_as_image(args.input)
+    image.stream()
+
+    if not args.font:
+        image.write(png.binary_stdout())
+    else:
+        font_copy(args.input, image, png.binary_stdout(), args.control)
+
+
+if __name__ == "__main__":
+    sys.exit(main())

Backend/venv/bin/pripnglsch

@@ -0,0 +1,33 @@
+#!/home/gnx/Desktop/Hotel-Booking/Backend/venv/bin/python3
+# pripnglsch
+# PNG List Chunks
+
+import png
+
+
+def list_chunks(out, inp):
+    r = png.Reader(file=inp)
+    for t, v in r.chunks():
+        add = ""
+        if len(v) <= 28:
+            add = " " + v.hex()
+        else:
+            add = " " + v[:26].hex() + "..."
+        t = t.decode("ascii")
+        print("%s %10d%s" % (t, len(v), add), file=out)
+
+
+def main(argv=None):
+    import argparse
+    import sys
+
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        "input", nargs="?", default="-", type=png.cli_open, metavar="PNG"
+    )
+    args = parser.parse_args()
+    return list_chunks(sys.stdout, args.input)
+
+
+if __name__ == "__main__":
+    main()

Backend/venv/bin/pripngtopam

@@ -0,0 +1,101 @@
+#!/home/gnx/Desktop/Hotel-Booking/Backend/venv/bin/python3
+
+import struct
+
+import png
+
+
+def write_pnm(file, plain, rows, meta):
+    """
+    Write a Netpbm PNM (or PAM) file.
+    *file* output file object;
+    *plain* (a bool) true if writing plain format (not possible for PAM);
+    *rows* an iterator for the rows;
+    *meta* the info dictionary.
+    """
+
+    meta = dict(meta)
+    meta["maxval"] = 2 ** meta["bitdepth"] - 1
+    meta["width"], meta["height"] = meta["size"]
+
+    # Number of planes determines both image formats:
+    # 1 : L to PGM
+    # 2 : LA to PAM
+    # 3 : RGB to PPM
+    # 4 : RGBA to PAM
+    planes = meta["planes"]
+
+    # Assume inputs are from a PNG file.
+    assert planes in (1, 2, 3, 4)
+    if planes in (1, 3):
+        if 1 == planes:
+            # PGM
+            # Even if maxval is 1 we use PGM instead of PBM,
+            # to avoid converting data.
+            magic = "P5"
+            if plain:
+                magic = "P2"
+        else:
+            # PPM
+            magic = "P6"
+            if plain:
+                magic = "P3"
+        header = "{magic} {width:d} {height:d} {maxval:d}\n".format(magic=magic, **meta)
+    if planes in (2, 4):
+        # PAM
+        # See http://netpbm.sourceforge.net/doc/pam.html
+        if plain:
+            raise Exception("PAM (%d-plane) does not support plain format" % planes)
+        if 2 == planes:
+            tupltype = "GRAYSCALE_ALPHA"
+        else:
+            tupltype = "RGB_ALPHA"
+        header = (
+            "P7\nWIDTH {width:d}\nHEIGHT {height:d}\n"
+            "DEPTH {planes:d}\nMAXVAL {maxval:d}\n"
+            "TUPLTYPE {tupltype}\nENDHDR\n".format(tupltype=tupltype, **meta)
+        )
+    file.write(header.encode("ascii"))
+
+    # Values per row
+    vpr = planes * meta["width"]
+
+    if plain:
+        for row in rows:
+            row_b = b" ".join([b"%d" % v for v in row])
+            file.write(row_b)
+            file.write(b"\n")
+    else:
+        # format for struct.pack
+        fmt = ">%d" % vpr
+        if meta["maxval"] > 0xFF:
+            fmt = fmt + "H"
+        else:
+            fmt = fmt + "B"
+        for row in rows:
+            file.write(struct.pack(fmt, *row))
+
+    file.flush()
+
+
+def main(argv=None):
+    import argparse
+
+    parser = argparse.ArgumentParser(description="Convert PNG to PAM")
+    parser.add_argument("--plain", action="store_true")
+    parser.add_argument(
+        "input", nargs="?", default="-", type=png.cli_open, metavar="PNG"
+    )
+
+    args = parser.parse_args()
+
+    # Encode PNG to PNM (or PAM)
+    image = png.Reader(file=args.input)
+    _, _, rows, info = image.asDirect()
+    write_pnm(png.binary_stdout(), args.plain, rows, info)
+
+
+if __name__ == "__main__":
+    import sys
+
+    sys.exit(main())

Backend/venv/bin/prirowpng

@@ -0,0 +1,71 @@
+#!/home/gnx/Desktop/Hotel-Booking/Backend/venv/bin/python3
+
+# http://www.python.org/doc/2.4.4/lib/module-itertools.html
+import itertools
+import sys
+
+import png
+
+Description = """Join PNG images in a row left-to-right."""
+
+
+class FormatError(Exception):
+    """
+    Some problem with the image format.
+    """
+
+
+def join_row(out, l):
+    """
+    Concatenate the list of images.
+    All input images must be same height and
+    have the same number of channels.
+    They are concatenated left-to-right.
+    `out` is the (open file) destination for the output image.
+    `l` should be a list of open files (the input image files).
+    """
+
+    l = [png.Reader(file=f) for f in l]
+
+    # Ewgh, side effects.
+    for r in l:
+        r.preamble()
+
+    # The reference height; from the first image.
+    height = l[0].height
+    # The total target width
+    width = 0
+    for i,r in enumerate(l):
+        if r.height != height:
+            raise FormatError('Image %d, height %d, does not match %d.' %
+              (i, r.height, height))
+        width += r.width
+
+    # Various bugs here because different numbers of channels and depths go wrong.
+    pixel, info = zip(*[r.asDirect()[2:4] for r in l])
+    tinfo = dict(info[0])
+    del tinfo['size']
+    w = png.Writer(width, height, **tinfo)
+
+    def iter_all_rows():
+        for row in zip(*pixel):
+            # `row` is a sequence that has one row from each input image.
+            # list() is required here to hasten the lazy row building;
+            # not sure if that's a bug in PyPNG or not.
+            yield list(itertools.chain(*row))
+    w.write(out, iter_all_rows())
+
+def main(argv):
+    import argparse
+
+    parser = argparse.ArgumentParser(description=Description)
+    parser.add_argument(
+        "input", nargs="*", default="-", type=png.cli_open, metavar="PNG"
+    )
+
+    args = parser.parse_args()
+
+    return join_row(png.binary_stdout(), args.input)
+
+if __name__ == '__main__':
+    main(sys.argv)

Backend/venv/bin/priweavepng

@@ -0,0 +1,215 @@
+#!/home/gnx/Desktop/Hotel-Booking/Backend/venv/bin/python3
+
+# priweavepng
+# Weave selected channels from input PNG files into
+# a multi-channel output PNG.
+
+import collections
+import re
+
+from array import array
+
+import png
+
+"""
+priweavepng file1.png [file2.png ...]
+
+The `priweavepng` tool combines channels from the input images and
+weaves a selection of those channels into an output image.
+
+Conceptually an intermediate image is formed consisting of
+all channels of all input images in the order given on the command line
+and in the order of each channel in its image.
+Then from 1 to 4 channels are selected and
+an image is output with those channels.
+The limit on the number of selected channels is
+imposed by the PNG image format.
+
+The `-c n` option selects channel `n`.
+Further channels can be selected either by repeating the `-c` option,
+or using a comma separated list.
+For example `-c 3,2,1` will select channels 3, 2, and 1 in that order;
+if the input is an RGB PNG, this will swop the Red and Blue channels.
+The order is significant, the order in which the options are given is
+the order of the output channels.
+It is permissible, and sometimes useful
+(for example, grey to colour expansion, see below),
+to repeat the same channel.
+
+If no `-c` option is used the default is
+to select all of the input channels, up to the first 4.
+
+`priweavepng` does not care about the meaning of the channels
+and treats them as a matrix of values.
+
+The numer of output channels determines the colour mode of the PNG file:
+L (1-channel, Grey), LA (2-channel, Grey+Alpha),
+RGB (3-channel, Red+Green+Blue), RGBA (4-channel, Red+Green+Blue+Alpha).
+
+The `priweavepng` tool can be used for a variety of
+channel building, swopping, and extraction effects:
+
+Combine 3 grayscale images into RGB colour:
+    priweavepng grey1.png grey2.png grey3.png
+
+Swop Red and Blue channels in colour image:
+    priweavepng -c 3 -c 2 -c 1 rgb.png
+
+Extract Green channel as a greyscale image:
+    priweavepng -c 2 rgb.png
+
+Convert a greyscale image to a colour image (all grey):
+    priweavepng -c 1 -c 1 -c 1 grey.png
+
+Add alpha mask from a separate (greyscale) image:
+    priweavepng rgb.png grey.png
+
+Extract alpha mask into a separate (greyscale) image:
+    priweavepng -c 4 rgba.png
+
+Steal alpha mask from second file and add to first.
+Note that the intermediate image in this example has 7 channels:
+    priweavepng -c 1 -c 2 -c 3 -c 7 rgb.png rgba.png
+
+Take Green channel from 3 successive colour images to make a new RGB image:
+    priweavepng -c 2 -c 5 -c 8 rgb1.png rgb2.png rgb3.png
+
+"""
+
+Image = collections.namedtuple("Image", "rows info")
+
+# For each channel in the intermediate raster,
+# model:
+# - image: the input image (0-based);
+# - i: the channel index within that image (0-based);
+# - bitdepth: the bitdepth of this channel.
+Channel = collections.namedtuple("Channel", "image i bitdepth")
+
+
+class Error(Exception):
+    pass
+
+
+def weave(out, args):
+    """Stack the input PNG files and extract channels
+    into a single output PNG.
+    """
+
+    paths = args.input
+
+    if len(paths) < 1:
+        raise Error("Required input is missing.")
+
+    # List of Image instances
+    images = []
+    # Channel map. Maps from channel number (starting from 1)
+    # to an (image_index, channel_index) pair.
+    channel_map = dict()
+    channel = 1
+
+    for image_index, path in enumerate(paths):
+        inp = png.cli_open(path)
+        rows, info = png.Reader(file=inp).asDirect()[2:]
+        rows = list(rows)
+        image = Image(rows, info)
+        images.append(image)
+        # A later version of PyPNG may intelligently support
+        # PNG files with heterogenous bitdepths.
+        # For now, assumes bitdepth of all channels in image
+        # is the same.
+        channel_bitdepth = (image.info["bitdepth"],) * image.info["planes"]
+        for i in range(image.info["planes"]):
+            channel_map[channel + i] = Channel(image_index, i, channel_bitdepth[i])
+        channel += image.info["planes"]
+
+    assert channel - 1 == sum(image.info["planes"] for image in images)
+
+    # If no channels, select up to first 4 as default.
+    if not args.channel:
+        args.channel = range(1, channel)[:4]
+
+    out_channels = len(args.channel)
+    if not (0 < out_channels <= 4):
+        raise Error("Too many channels selected (must be 1 to 4)")
+    alpha = out_channels in (2, 4)
+    greyscale = out_channels in (1, 2)
+
+    bitdepth = tuple(image.info["bitdepth"] for image in images)
+    arraytype = "BH"[max(bitdepth) > 8]
+
+    size = [image.info["size"] for image in images]
+    # Currently, fail unless all images same size.
+    if len(set(size)) > 1:
+        raise NotImplementedError("Cannot cope when sizes differ - sorry!")
+    size = size[0]
+
+    # Values per row, of output image
+    vpr = out_channels * size[0]
+
+    def weave_row_iter():
+        """
+        Yield each woven row in turn.
+        """
+        # The zip call creates an iterator that yields
+        # a tuple with each element containing the next row
+        # for each of the input images.
+        for row_tuple in zip(*(image.rows for image in images)):
+            # output row
+            row = array(arraytype, [0] * vpr)
+            # for each output channel select correct input channel
+            for out_channel_i, selection in enumerate(args.channel):
+                channel = channel_map[selection]
+                # incoming row (make it an array)
+                irow = array(arraytype, row_tuple[channel.image])
+                n = images[channel.image].info["planes"]
+                row[out_channel_i::out_channels] = irow[channel.i :: n]
+            yield row
+
+    w = png.Writer(
+        size[0],
+        size[1],
+        greyscale=greyscale,
+        alpha=alpha,
+        bitdepth=bitdepth,
+        interlace=args.interlace,
+    )
+    w.write(out, weave_row_iter())
+
+
+def comma_list(s):
+    """
+    Type and return a list of integers.
+    """
+
+    return [int(c) for c in re.findall(r"\d+", s)]
+
+
+def main(argv=None):
+    import argparse
+    import itertools
+    import sys
+
+    if argv is None:
+        argv = sys.argv
+    argv = argv[1:]
+
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        "-c",
+        "--channel",
+        action="append",
+        type=comma_list,
+        help="list of channels to extract",
+    )
+    parser.add_argument("--interlace", action="store_true", help="write interlaced PNG")
+    parser.add_argument("input", nargs="+")
+    args = parser.parse_args(argv)
+
+    if args.channel:
+        args.channel = list(itertools.chain(*args.channel))
+
+    return weave(png.binary_stdout(), args)
+
+
+if __name__ == "__main__":
+    main()

Backend/venv/bin/qr

@@ -0,0 +1,7 @@
+#!/home/gnx/Desktop/Hotel-Booking/Backend/venv/bin/python3
+import sys
+from qrcode.console_scripts import main
+if __name__ == '__main__':
+    if sys.argv[0].endswith('.exe'):
+        sys.argv[0] = sys.argv[0][:-4]
+    sys.exit(main())

Backend/venv/lib/python3.12/site-packages/OpenSSL/__init__.py

@@ -0,0 +1,31 @@
+# Copyright (C) AB Strakt
+# See LICENSE for details.
+
+"""
+pyOpenSSL - A simple wrapper around the OpenSSL library
+"""
+
+from OpenSSL import SSL, crypto
+from OpenSSL.version import (
+    __author__,
+    __copyright__,
+    __email__,
+    __license__,
+    __summary__,
+    __title__,
+    __uri__,
+    __version__,
+)
+
+__all__ = [
+    "SSL",
+    "__author__",
+    "__copyright__",
+    "__email__",
+    "__license__",
+    "__summary__",
+    "__title__",
+    "__uri__",
+    "__version__",
+    "crypto",
+]

Backend/venv/lib/python3.12/site-packages/OpenSSL/_util.py

@@ -0,0 +1,129 @@
+from __future__ import annotations
+
+import os
+import sys
+import warnings
+from typing import Any, Callable, NoReturn, Union
+
+from cryptography.hazmat.bindings.openssl.binding import Binding
+
+if sys.version_info >= (3, 9):
+    StrOrBytesPath = Union[str, bytes, os.PathLike[str], os.PathLike[bytes]]
+else:
+    StrOrBytesPath = Union[str, bytes, os.PathLike]
+
+binding = Binding()
+ffi = binding.ffi
+lib: Any = binding.lib
+
+
+# This is a special CFFI allocator that does not bother to zero its memory
+# after allocation. This has vastly better performance on large allocations and
+# so should be used whenever we don't need the memory zeroed out.
+no_zero_allocator = ffi.new_allocator(should_clear_after_alloc=False)
+
+
+def text(charp: Any) -> str:
+    """
+    Get a native string type representing of the given CFFI ``char*`` object.
+
+    :param charp: A C-style string represented using CFFI.
+
+    :return: :class:`str`
+    """
+    if not charp:
+        return ""
+    return ffi.string(charp).decode("utf-8")
+
+
+def exception_from_error_queue(exception_type: type[Exception]) -> NoReturn:
+    """
+    Convert an OpenSSL library failure into a Python exception.
+
+    When a call to the native OpenSSL library fails, this is usually signalled
+    by the return value, and an error code is stored in an error queue
+    associated with the current thread. The err library provides functions to
+    obtain these error codes and textual error messages.
+    """
+    errors = []
+
+    while True:
+        error = lib.ERR_get_error()
+        if error == 0:
+            break
+        errors.append(
+            (
+                text(lib.ERR_lib_error_string(error)),
+                text(lib.ERR_func_error_string(error)),
+                text(lib.ERR_reason_error_string(error)),
+            )
+        )
+
+    raise exception_type(errors)
+
+
+def make_assert(error: type[Exception]) -> Callable[[bool], Any]:
+    """
+    Create an assert function that uses :func:`exception_from_error_queue` to
+    raise an exception wrapped by *error*.
+    """
+
+    def openssl_assert(ok: bool) -> None:
+        """
+        If *ok* is not True, retrieve the error from OpenSSL and raise it.
+        """
+        if ok is not True:
+            exception_from_error_queue(error)
+
+    return openssl_assert
+
+
+def path_bytes(s: StrOrBytesPath) -> bytes:
+    """
+    Convert a Python path to a :py:class:`bytes` for the path which can be
+    passed into an OpenSSL API accepting a filename.
+
+    :param s: A path (valid for os.fspath).
+
+    :return: An instance of :py:class:`bytes`.
+    """
+    b = os.fspath(s)
+
+    if isinstance(b, str):
+        return b.encode(sys.getfilesystemencoding())
+    else:
+        return b
+
+
+def byte_string(s: str) -> bytes:
+    return s.encode("charmap")
+
+
+# A marker object to observe whether some optional arguments are passed any
+# value or not.
+UNSPECIFIED = object()
+
+_TEXT_WARNING = "str for {0} is no longer accepted, use bytes"
+
+
+def text_to_bytes_and_warn(label: str, obj: Any) -> Any:
+    """
+    If ``obj`` is text, emit a warning that it should be bytes instead and try
+    to convert it to bytes automatically.
+
+    :param str label: The name of the parameter from which ``obj`` was taken
+        (so a developer can easily find the source of the problem and correct
+        it).
+
+    :return: If ``obj`` is the text string type, a ``bytes`` object giving the
+        UTF-8 encoding of that text is returned.  Otherwise, ``obj`` itself is
+        returned.
+    """
+    if isinstance(obj, str):
+        warnings.warn(
+            _TEXT_WARNING.format(label),
+            category=DeprecationWarning,
+            stacklevel=3,
+        )
+        return obj.encode("utf-8")
+    return obj

Backend/venv/lib/python3.12/site-packages/OpenSSL/debug.py

@@ -0,0 +1,40 @@
+import ssl
+import sys
+
+import cffi
+import cryptography
+
+import OpenSSL.SSL
+
+from . import version
+
+_env_info = """\
+pyOpenSSL: {pyopenssl}
+cryptography: {cryptography}
+cffi: {cffi}
+cryptography's compiled against OpenSSL: {crypto_openssl_compile}
+cryptography's linked OpenSSL: {crypto_openssl_link}
+Python's OpenSSL: {python_openssl}
+Python executable: {python}
+Python version: {python_version}
+Platform: {platform}
+sys.path: {sys_path}""".format(
+    pyopenssl=version.__version__,
+    crypto_openssl_compile=OpenSSL._util.ffi.string(
+        OpenSSL._util.lib.OPENSSL_VERSION_TEXT,
+    ).decode("ascii"),
+    crypto_openssl_link=OpenSSL.SSL.SSLeay_version(
+        OpenSSL.SSL.SSLEAY_VERSION
+    ).decode("ascii"),
+    python_openssl=getattr(ssl, "OPENSSL_VERSION", "n/a"),
+    cryptography=cryptography.__version__,
+    cffi=cffi.__version__,
+    python=sys.executable,
+    python_version=sys.version,
+    platform=sys.platform,
+    sys_path=sys.path,
+)
+
+
+if __name__ == "__main__":
+    print(_env_info)

Backend/venv/lib/python3.12/site-packages/OpenSSL/rand.py

@@ -0,0 +1,50 @@
+"""
+PRNG management routines, thin wrappers.
+"""
+
+from __future__ import annotations
+
+import warnings
+
+from OpenSSL._util import lib as _lib
+
+warnings.warn(
+    "OpenSSL.rand is deprecated - you should use os.urandom instead",
+    DeprecationWarning,
+    stacklevel=3,
+)
+
+
+def add(buffer: bytes, entropy: int) -> None:
+    """
+    Mix bytes from *string* into the PRNG state.
+
+    The *entropy* argument is (the lower bound of) an estimate of how much
+    randomness is contained in *string*, measured in bytes.
+
+    For more information, see e.g. :rfc:`1750`.
+
+    This function is only relevant if you are forking Python processes and
+    need to reseed the CSPRNG after fork.
+
+    :param buffer: Buffer with random data.
+    :param entropy: The entropy (in bytes) measurement of the buffer.
+
+    :return: :obj:`None`
+    """
+    if not isinstance(buffer, bytes):
+        raise TypeError("buffer must be a byte string")
+
+    if not isinstance(entropy, int):
+        raise TypeError("entropy must be an integer")
+
+    _lib.RAND_add(buffer, len(buffer), entropy)
+
+
+def status() -> int:
+    """
+    Check whether the PRNG has been seeded with enough data.
+
+    :return: 1 if the PRNG is seeded enough, 0 otherwise.
+    """
+    return _lib.RAND_status()

Backend/venv/lib/python3.12/site-packages/OpenSSL/version.py

@@ -0,0 +1,28 @@
+# Copyright (C) AB Strakt
+# Copyright (C) Jean-Paul Calderone
+# See LICENSE for details.
+
+"""
+pyOpenSSL - A simple wrapper around the OpenSSL library
+"""
+
+__all__ = [
+    "__author__",
+    "__copyright__",
+    "__email__",
+    "__license__",
+    "__summary__",
+    "__title__",
+    "__uri__",
+    "__version__",
+]
+
+__version__ = "25.3.0"
+
+__title__ = "pyOpenSSL"
+__uri__ = "https://pyopenssl.org/"
+__summary__ = "Python wrapper module around the OpenSSL library"
+__author__ = "The pyOpenSSL developers"
+__email__ = "cryptography-dev@python.org"
+__license__ = "Apache License, Version 2.0"
+__copyright__ = f"Copyright 2001-2025 {__author__}"

Backend/venv/lib/python3.12/site-packages/cryptography-41.0.7.dist-info/RECORD

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Backend/venv/lib/python3.12/site-packages/cryptography-41.0.7.dist-info/top_level.txt

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-cryptography

Backend/venv/lib/python3.12/site-packages/cryptography-46.0.3.dist-info/METADATA

@@ -1,18 +1,8 @@
-Metadata-Version: 2.1
+Metadata-Version: 2.4
 Name: cryptography
-Version: 41.0.7
-Summary: cryptography is a package which provides cryptographic recipes and primitives to Python developers.
-Author-email: The Python Cryptographic Authority and individual contributors <cryptography-dev@python.org>
-License: Apache-2.0 OR BSD-3-Clause
-Project-URL: homepage, https://github.com/pyca/cryptography
-Project-URL: documentation, https://cryptography.io/
-Project-URL: source, https://github.com/pyca/cryptography/
-Project-URL: issues, https://github.com/pyca/cryptography/issues
-Project-URL: changelog, https://cryptography.io/en/latest/changelog/
+Version: 46.0.3
 Classifier: Development Status :: 5 - Production/Stable
 Classifier: Intended Audience :: Developers
-Classifier: License :: OSI Approved :: Apache Software License
-Classifier: License :: OSI Approved :: BSD License
 Classifier: Natural Language :: English
 Classifier: Operating System :: MacOS :: MacOS X
 Classifier: Operating System :: POSIX
@@ -22,46 +12,62 @@ Classifier: Operating System :: Microsoft :: Windows
 Classifier: Programming Language :: Python
 Classifier: Programming Language :: Python :: 3
 Classifier: Programming Language :: Python :: 3 :: Only
-Classifier: Programming Language :: Python :: 3.7
 Classifier: Programming Language :: Python :: 3.8
 Classifier: Programming Language :: Python :: 3.9
 Classifier: Programming Language :: Python :: 3.10
 Classifier: Programming Language :: Python :: 3.11
+Classifier: Programming Language :: Python :: 3.12
+Classifier: Programming Language :: Python :: 3.13
+Classifier: Programming Language :: Python :: 3.14
 Classifier: Programming Language :: Python :: Implementation :: CPython
 Classifier: Programming Language :: Python :: Implementation :: PyPy
+Classifier: Programming Language :: Python :: Free Threading :: 3 - Stable
 Classifier: Topic :: Security :: Cryptography
-Requires-Python: >=3.7
-Description-Content-Type: text/x-rst
+Requires-Dist: cffi>=1.14 ; python_full_version == '3.8.*' and platform_python_implementation != 'PyPy'
+Requires-Dist: cffi>=2.0.0 ; python_full_version >= '3.9' and platform_python_implementation != 'PyPy'
+Requires-Dist: typing-extensions>=4.13.2 ; python_full_version < '3.11'
+Requires-Dist: bcrypt>=3.1.5 ; extra == 'ssh'
+Requires-Dist: nox[uv]>=2024.4.15 ; extra == 'nox'
+Requires-Dist: cryptography-vectors==46.0.3 ; extra == 'test'
+Requires-Dist: pytest>=7.4.0 ; extra == 'test'
+Requires-Dist: pytest-benchmark>=4.0 ; extra == 'test'
+Requires-Dist: pytest-cov>=2.10.1 ; extra == 'test'
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+Requires-Dist: pretend>=0.7 ; extra == 'test'
+Requires-Dist: certifi>=2024 ; extra == 'test'
+Requires-Dist: pytest-randomly ; extra == 'test-randomorder'
+Requires-Dist: sphinx>=5.3.0 ; extra == 'docs'
+Requires-Dist: sphinx-rtd-theme>=3.0.0 ; extra == 'docs'
+Requires-Dist: sphinx-inline-tabs ; extra == 'docs'
+Requires-Dist: pyenchant>=3 ; extra == 'docstest'
+Requires-Dist: readme-renderer>=30.0 ; extra == 'docstest'
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+Requires-Dist: check-sdist ; extra == 'pep8test'
+Requires-Dist: click>=8.0.1 ; extra == 'pep8test'
+Provides-Extra: ssh
+Provides-Extra: nox
+Provides-Extra: test
+Provides-Extra: test-randomorder
+Provides-Extra: docs
+Provides-Extra: docstest
+Provides-Extra: sdist
+Provides-Extra: pep8test
 License-File: LICENSE
 License-File: LICENSE.APACHE
 License-File: LICENSE.BSD
-Requires-Dist: cffi >=1.12
-Provides-Extra: docs
-Requires-Dist: sphinx >=5.3.0 ; extra == 'docs'
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-Requires-Dist: pretend ; extra == 'test'
-Provides-Extra: test-randomorder
-Requires-Dist: pytest-randomly ; extra == 'test-randomorder'
+Summary: cryptography is a package which provides cryptographic recipes and primitives to Python developers.
+Author-email: The Python Cryptographic Authority and individual contributors <cryptography-dev@python.org>
+License-Expression: Apache-2.0 OR BSD-3-Clause
+Requires-Python: >=3.8, !=3.9.0, !=3.9.1
+Description-Content-Type: text/x-rst; charset=UTF-8
+Project-URL: homepage, https://github.com/pyca/cryptography
+Project-URL: documentation, https://cryptography.io/
+Project-URL: source, https://github.com/pyca/cryptography/
+Project-URL: issues, https://github.com/pyca/cryptography/issues
+Project-URL: changelog, https://cryptography.io/en/latest/changelog/
 
 pyca/cryptography
 =================
@@ -74,13 +80,12 @@ pyca/cryptography
     :target: https://cryptography.io
     :alt: Latest Docs
 
-.. image:: https://github.com/pyca/cryptography/workflows/CI/badge.svg?branch=main
-    :target: https://github.com/pyca/cryptography/actions?query=workflow%3ACI+branch%3Amain
-
+.. image:: https://github.com/pyca/cryptography/actions/workflows/ci.yml/badge.svg
+    :target: https://github.com/pyca/cryptography/actions/workflows/ci.yml?query=branch%3Amain
 
 ``cryptography`` is a package which provides cryptographic recipes and
 primitives to Python developers. Our goal is for it to be your "cryptographic
-standard library". It supports Python 3.7+ and PyPy3 7.3.10+.
+standard library". It supports Python 3.8+ and PyPy3 7.3.11+.
 
 ``cryptography`` includes both high level recipes and low level interfaces to
 common cryptographic algorithms such as symmetric ciphers, message digests, and
@@ -131,3 +136,4 @@ documentation.
 .. _`issue tracker`: https://github.com/pyca/cryptography/issues
 .. _`cryptography-dev`: https://mail.python.org/mailman/listinfo/cryptography-dev
 .. _`security reporting`: https://cryptography.io/en/latest/security/
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Backend/venv/lib/python3.12/site-packages/cryptography-46.0.3.dist-info/WHEEL

@@ -0,0 +1,5 @@
+Wheel-Version: 1.0
+Generator: maturin (1.9.4)
+Root-Is-Purelib: false
+Tag: cp311-abi3-manylinux_2_34_x86_64
+

Backend/venv/lib/python3.12/site-packages/cryptography/__about__.py

@@ -5,13 +5,13 @@
 from __future__ import annotations
 
 __all__ = [
-    "__version__",
     "__author__",
     "__copyright__",
+    "__version__",
 ]
 
-__version__ = "41.0.7"
+__version__ = "46.0.3"
 
 
 __author__ = "The Python Cryptographic Authority and individual contributors"
-__copyright__ = f"Copyright 2013-2023 {__author__}"
+__copyright__ = f"Copyright 2013-2025 {__author__}"

Backend/venv/lib/python3.12/site-packages/cryptography/__init__.py

@@ -7,7 +7,7 @@ from __future__ import annotations
 from cryptography.__about__ import __author__, __copyright__, __version__
 
 __all__ = [
-    "__version__",
     "__author__",
     "__copyright__",
+    "__version__",
 ]

Backend/venv/lib/python3.12/site-packages/cryptography/exceptions.py

@@ -15,9 +15,7 @@ _Reasons = rust_exceptions._Reasons
 
 
 class UnsupportedAlgorithm(Exception):
-    def __init__(
-        self, message: str, reason: typing.Optional[_Reasons] = None
-    ) -> None:
+    def __init__(self, message: str, reason: _Reasons | None = None) -> None:
         super().__init__(message)
         self._reason = reason
 
@@ -44,7 +42,7 @@ class InvalidSignature(Exception):
 
 class InternalError(Exception):
     def __init__(
-        self, msg: str, err_code: typing.List[rust_openssl.OpenSSLError]
+        self, msg: str, err_code: list[rust_openssl.OpenSSLError]
     ) -> None:
         super().__init__(msg)
         self.err_code = err_code

Backend/venv/lib/python3.12/site-packages/cryptography/fernet.py

@@ -9,6 +9,7 @@ import binascii
 import os
 import time
 import typing
+from collections.abc import Iterable
 
 from cryptography import utils
 from cryptography.exceptions import InvalidSignature
@@ -27,7 +28,7 @@ _MAX_CLOCK_SKEW = 60
 class Fernet:
     def __init__(
         self,
-        key: typing.Union[bytes, str],
+        key: bytes | str,
         backend: typing.Any = None,
     ) -> None:
         try:
@@ -80,9 +81,7 @@ class Fernet:
         hmac = h.finalize()
         return base64.urlsafe_b64encode(basic_parts + hmac)
 
-    def decrypt(
-        self, token: typing.Union[bytes, str], ttl: typing.Optional[int] = None
-    ) -> bytes:
+    def decrypt(self, token: bytes | str, ttl: int | None = None) -> bytes:
         timestamp, data = Fernet._get_unverified_token_data(token)
         if ttl is None:
             time_info = None
@@ -91,7 +90,7 @@ class Fernet:
         return self._decrypt_data(data, timestamp, time_info)
 
     def decrypt_at_time(
-        self, token: typing.Union[bytes, str], ttl: int, current_time: int
+        self, token: bytes | str, ttl: int, current_time: int
     ) -> bytes:
         if ttl is None:
             raise ValueError(
@@ -100,16 +99,14 @@ class Fernet:
         timestamp, data = Fernet._get_unverified_token_data(token)
         return self._decrypt_data(data, timestamp, (ttl, current_time))
 
-    def extract_timestamp(self, token: typing.Union[bytes, str]) -> int:
+    def extract_timestamp(self, token: bytes | str) -> int:
         timestamp, data = Fernet._get_unverified_token_data(token)
         # Verify the token was not tampered with.
         self._verify_signature(data)
         return timestamp
 
     @staticmethod
-    def _get_unverified_token_data(
-        token: typing.Union[bytes, str]
-    ) -> typing.Tuple[int, bytes]:
+    def _get_unverified_token_data(token: bytes | str) -> tuple[int, bytes]:
         if not isinstance(token, (str, bytes)):
             raise TypeError("token must be bytes or str")
 
@@ -139,7 +136,7 @@ class Fernet:
         self,
         data: bytes,
         timestamp: int,
-        time_info: typing.Optional[typing.Tuple[int, int]],
+        time_info: tuple[int, int] | None,
     ) -> bytes:
         if time_info is not None:
             ttl, current_time = time_info
@@ -172,7 +169,7 @@ class Fernet:
 
 
 class MultiFernet:
-    def __init__(self, fernets: typing.Iterable[Fernet]):
+    def __init__(self, fernets: Iterable[Fernet]):
         fernets = list(fernets)
         if not fernets:
             raise ValueError(
@@ -186,7 +183,7 @@ class MultiFernet:
     def encrypt_at_time(self, msg: bytes, current_time: int) -> bytes:
         return self._fernets[0].encrypt_at_time(msg, current_time)
 
-    def rotate(self, msg: typing.Union[bytes, str]) -> bytes:
+    def rotate(self, msg: bytes | str) -> bytes:
         timestamp, data = Fernet._get_unverified_token_data(msg)
         for f in self._fernets:
             try:
@@ -200,9 +197,7 @@ class MultiFernet:
         iv = os.urandom(16)
         return self._fernets[0]._encrypt_from_parts(p, timestamp, iv)
 
-    def decrypt(
-        self, msg: typing.Union[bytes, str], ttl: typing.Optional[int] = None
-    ) -> bytes:
+    def decrypt(self, msg: bytes | str, ttl: int | None = None) -> bytes:
         for f in self._fernets:
             try:
                 return f.decrypt(msg, ttl)
@@ -211,7 +206,7 @@ class MultiFernet:
         raise InvalidToken
 
     def decrypt_at_time(
-        self, msg: typing.Union[bytes, str], ttl: int, current_time: int
+        self, msg: bytes | str, ttl: int, current_time: int
     ) -> bytes:
         for f in self._fernets:
             try:
@@ -219,3 +214,11 @@ class MultiFernet:
             except InvalidToken:
                 pass
         raise InvalidToken
+
+    def extract_timestamp(self, msg: bytes | str) -> int:
+        for f in self._fernets:
+            try:
+                return f.extract_timestamp(msg)
+            except InvalidToken:
+                pass
+        raise InvalidToken

Backend/venv/lib/python3.12/site-packages/cryptography/hazmat/_oid.py

@@ -4,8 +4,6 @@
 
 from __future__ import annotations
 
-import typing
-
 from cryptography.hazmat.bindings._rust import (
     ObjectIdentifier as ObjectIdentifier,
 )
@@ -16,6 +14,7 @@ class ExtensionOID:
     SUBJECT_DIRECTORY_ATTRIBUTES = ObjectIdentifier("2.5.29.9")
     SUBJECT_KEY_IDENTIFIER = ObjectIdentifier("2.5.29.14")
     KEY_USAGE = ObjectIdentifier("2.5.29.15")
+    PRIVATE_KEY_USAGE_PERIOD = ObjectIdentifier("2.5.29.16")
     SUBJECT_ALTERNATIVE_NAME = ObjectIdentifier("2.5.29.17")
     ISSUER_ALTERNATIVE_NAME = ObjectIdentifier("2.5.29.18")
     BASIC_CONSTRAINTS = ObjectIdentifier("2.5.29.19")
@@ -41,6 +40,7 @@ class ExtensionOID:
     PRECERT_POISON = ObjectIdentifier("1.3.6.1.4.1.11129.2.4.3")
     SIGNED_CERTIFICATE_TIMESTAMPS = ObjectIdentifier("1.3.6.1.4.1.11129.2.4.5")
     MS_CERTIFICATE_TEMPLATE = ObjectIdentifier("1.3.6.1.4.1.311.21.7")
+    ADMISSIONS = ObjectIdentifier("1.3.36.8.3.3")
 
 
 class OCSPExtensionOID:
@@ -60,6 +60,7 @@ class NameOID:
     LOCALITY_NAME = ObjectIdentifier("2.5.4.7")
     STATE_OR_PROVINCE_NAME = ObjectIdentifier("2.5.4.8")
     STREET_ADDRESS = ObjectIdentifier("2.5.4.9")
+    ORGANIZATION_IDENTIFIER = ObjectIdentifier("2.5.4.97")
     ORGANIZATION_NAME = ObjectIdentifier("2.5.4.10")
     ORGANIZATIONAL_UNIT_NAME = ObjectIdentifier("2.5.4.11")
     SERIAL_NUMBER = ObjectIdentifier("2.5.4.5")
@@ -123,9 +124,7 @@ class SignatureAlgorithmOID:
     GOSTR3410_2012_WITH_3411_2012_512 = ObjectIdentifier("1.2.643.7.1.1.3.3")
 
 
-_SIG_OIDS_TO_HASH: typing.Dict[
-    ObjectIdentifier, typing.Optional[hashes.HashAlgorithm]
-] = {
+_SIG_OIDS_TO_HASH: dict[ObjectIdentifier, hashes.HashAlgorithm | None] = {
     SignatureAlgorithmOID.RSA_WITH_MD5: hashes.MD5(),
     SignatureAlgorithmOID.RSA_WITH_SHA1: hashes.SHA1(),
     SignatureAlgorithmOID._RSA_WITH_SHA1: hashes.SHA1(),
@@ -157,6 +156,33 @@ _SIG_OIDS_TO_HASH: typing.Dict[
 }
 
 
+class HashAlgorithmOID:
+    SHA1 = ObjectIdentifier("1.3.14.3.2.26")
+    SHA224 = ObjectIdentifier("2.16.840.1.101.3.4.2.4")
+    SHA256 = ObjectIdentifier("2.16.840.1.101.3.4.2.1")
+    SHA384 = ObjectIdentifier("2.16.840.1.101.3.4.2.2")
+    SHA512 = ObjectIdentifier("2.16.840.1.101.3.4.2.3")
+    SHA3_224 = ObjectIdentifier("1.3.6.1.4.1.37476.3.2.1.99.7.224")
+    SHA3_256 = ObjectIdentifier("1.3.6.1.4.1.37476.3.2.1.99.7.256")
+    SHA3_384 = ObjectIdentifier("1.3.6.1.4.1.37476.3.2.1.99.7.384")
+    SHA3_512 = ObjectIdentifier("1.3.6.1.4.1.37476.3.2.1.99.7.512")
+    SHA3_224_NIST = ObjectIdentifier("2.16.840.1.101.3.4.2.7")
+    SHA3_256_NIST = ObjectIdentifier("2.16.840.1.101.3.4.2.8")
+    SHA3_384_NIST = ObjectIdentifier("2.16.840.1.101.3.4.2.9")
+    SHA3_512_NIST = ObjectIdentifier("2.16.840.1.101.3.4.2.10")
+
+
+class PublicKeyAlgorithmOID:
+    DSA = ObjectIdentifier("1.2.840.10040.4.1")
+    EC_PUBLIC_KEY = ObjectIdentifier("1.2.840.10045.2.1")
+    RSAES_PKCS1_v1_5 = ObjectIdentifier("1.2.840.113549.1.1.1")
+    RSASSA_PSS = ObjectIdentifier("1.2.840.113549.1.1.10")
+    X25519 = ObjectIdentifier("1.3.101.110")
+    X448 = ObjectIdentifier("1.3.101.111")
+    ED25519 = ObjectIdentifier("1.3.101.112")
+    ED448 = ObjectIdentifier("1.3.101.113")
+
+
 class ExtendedKeyUsageOID:
     SERVER_AUTH = ObjectIdentifier("1.3.6.1.5.5.7.3.1")
     CLIENT_AUTH = ObjectIdentifier("1.3.6.1.5.5.7.3.2")
@@ -168,9 +194,20 @@ class ExtendedKeyUsageOID:
     SMARTCARD_LOGON = ObjectIdentifier("1.3.6.1.4.1.311.20.2.2")
     KERBEROS_PKINIT_KDC = ObjectIdentifier("1.3.6.1.5.2.3.5")
     IPSEC_IKE = ObjectIdentifier("1.3.6.1.5.5.7.3.17")
+    BUNDLE_SECURITY = ObjectIdentifier("1.3.6.1.5.5.7.3.35")
     CERTIFICATE_TRANSPARENCY = ObjectIdentifier("1.3.6.1.4.1.11129.2.4.4")
 
 
+class OtherNameFormOID:
+    PERMANENT_IDENTIFIER = ObjectIdentifier("1.3.6.1.5.5.7.8.3")
+    HW_MODULE_NAME = ObjectIdentifier("1.3.6.1.5.5.7.8.4")
+    DNS_SRV = ObjectIdentifier("1.3.6.1.5.5.7.8.7")
+    NAI_REALM = ObjectIdentifier("1.3.6.1.5.5.7.8.8")
+    SMTP_UTF8_MAILBOX = ObjectIdentifier("1.3.6.1.5.5.7.8.9")
+    ACP_NODE_NAME = ObjectIdentifier("1.3.6.1.5.5.7.8.10")
+    BUNDLE_EID = ObjectIdentifier("1.3.6.1.5.5.7.8.11")
+
+
 class AuthorityInformationAccessOID:
     CA_ISSUERS = ObjectIdentifier("1.3.6.1.5.5.7.48.2")
     OCSP = ObjectIdentifier("1.3.6.1.5.5.7.48.1")
@@ -228,7 +265,7 @@ _OID_NAMES = {
     SignatureAlgorithmOID.RSA_WITH_SHA256: "sha256WithRSAEncryption",
     SignatureAlgorithmOID.RSA_WITH_SHA384: "sha384WithRSAEncryption",
     SignatureAlgorithmOID.RSA_WITH_SHA512: "sha512WithRSAEncryption",
-    SignatureAlgorithmOID.RSASSA_PSS: "RSASSA-PSS",
+    SignatureAlgorithmOID.RSASSA_PSS: "rsassaPss",
     SignatureAlgorithmOID.ECDSA_WITH_SHA1: "ecdsa-with-SHA1",
     SignatureAlgorithmOID.ECDSA_WITH_SHA224: "ecdsa-with-SHA224",
     SignatureAlgorithmOID.ECDSA_WITH_SHA256: "ecdsa-with-SHA256",
@@ -248,6 +285,24 @@ _OID_NAMES = {
     SignatureAlgorithmOID.GOSTR3410_2012_WITH_3411_2012_512: (
         "GOST R 34.10-2012 with GOST R 34.11-2012 (512 bit)"
     ),
+    HashAlgorithmOID.SHA1: "sha1",
+    HashAlgorithmOID.SHA224: "sha224",
+    HashAlgorithmOID.SHA256: "sha256",
+    HashAlgorithmOID.SHA384: "sha384",
+    HashAlgorithmOID.SHA512: "sha512",
+    HashAlgorithmOID.SHA3_224: "sha3_224",
+    HashAlgorithmOID.SHA3_256: "sha3_256",
+    HashAlgorithmOID.SHA3_384: "sha3_384",
+    HashAlgorithmOID.SHA3_512: "sha3_512",
+    HashAlgorithmOID.SHA3_224_NIST: "sha3_224",
+    HashAlgorithmOID.SHA3_256_NIST: "sha3_256",
+    HashAlgorithmOID.SHA3_384_NIST: "sha3_384",
+    HashAlgorithmOID.SHA3_512_NIST: "sha3_512",
+    PublicKeyAlgorithmOID.DSA: "dsaEncryption",
+    PublicKeyAlgorithmOID.EC_PUBLIC_KEY: "id-ecPublicKey",
+    PublicKeyAlgorithmOID.RSAES_PKCS1_v1_5: "rsaEncryption",
+    PublicKeyAlgorithmOID.X25519: "X25519",
+    PublicKeyAlgorithmOID.X448: "X448",
     ExtendedKeyUsageOID.SERVER_AUTH: "serverAuth",
     ExtendedKeyUsageOID.CLIENT_AUTH: "clientAuth",
     ExtendedKeyUsageOID.CODE_SIGNING: "codeSigning",
@@ -259,6 +314,7 @@ _OID_NAMES = {
     ExtensionOID.SUBJECT_DIRECTORY_ATTRIBUTES: "subjectDirectoryAttributes",
     ExtensionOID.SUBJECT_KEY_IDENTIFIER: "subjectKeyIdentifier",
     ExtensionOID.KEY_USAGE: "keyUsage",
+    ExtensionOID.PRIVATE_KEY_USAGE_PERIOD: "privateKeyUsagePeriod",
     ExtensionOID.SUBJECT_ALTERNATIVE_NAME: "subjectAltName",
     ExtensionOID.ISSUER_ALTERNATIVE_NAME: "issuerAltName",
     ExtensionOID.BASIC_CONSTRAINTS: "basicConstraints",
@@ -270,6 +326,7 @@ _OID_NAMES = {
     ),
     ExtensionOID.PRECERT_POISON: "ctPoison",
     ExtensionOID.MS_CERTIFICATE_TEMPLATE: "msCertificateTemplate",
+    ExtensionOID.ADMISSIONS: "Admissions",
     CRLEntryExtensionOID.CRL_REASON: "cRLReason",
     CRLEntryExtensionOID.INVALIDITY_DATE: "invalidityDate",
     CRLEntryExtensionOID.CERTIFICATE_ISSUER: "certificateIssuer",
@@ -282,7 +339,7 @@ _OID_NAMES = {
     ExtensionOID.EXTENDED_KEY_USAGE: "extendedKeyUsage",
     ExtensionOID.FRESHEST_CRL: "freshestCRL",
     ExtensionOID.INHIBIT_ANY_POLICY: "inhibitAnyPolicy",
-    ExtensionOID.ISSUING_DISTRIBUTION_POINT: ("issuingDistributionPoint"),
+    ExtensionOID.ISSUING_DISTRIBUTION_POINT: "issuingDistributionPoint",
     ExtensionOID.AUTHORITY_INFORMATION_ACCESS: "authorityInfoAccess",
     ExtensionOID.SUBJECT_INFORMATION_ACCESS: "subjectInfoAccess",
     ExtensionOID.OCSP_NO_CHECK: "OCSPNoCheck",

Backend/venv/lib/python3.12/site-packages/cryptography/hazmat/asn1/__init__.py

@@ -0,0 +1,10 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from cryptography.hazmat.asn1.asn1 import encode_der, sequence
+
+__all__ = [
+    "encode_der",
+    "sequence",
+]

Backend/venv/lib/python3.12/site-packages/cryptography/hazmat/asn1/asn1.py

@@ -0,0 +1,116 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+import dataclasses
+import sys
+import typing
+
+if sys.version_info < (3, 11):
+    import typing_extensions
+
+    # We use the `include_extras` parameter of `get_type_hints`, which was
+    # added in Python 3.9. This can be replaced by the `typing` version
+    # once the min version is >= 3.9
+    if sys.version_info < (3, 9):
+        get_type_hints = typing_extensions.get_type_hints
+    else:
+        get_type_hints = typing.get_type_hints
+else:
+    get_type_hints = typing.get_type_hints
+
+from cryptography.hazmat.bindings._rust import declarative_asn1
+
+T = typing.TypeVar("T", covariant=True)
+U = typing.TypeVar("U")
+
+
+encode_der = declarative_asn1.encode_der
+
+
+def _normalize_field_type(
+    field_type: typing.Any, field_name: str
+) -> declarative_asn1.AnnotatedType:
+    annotation = declarative_asn1.Annotation()
+
+    if hasattr(field_type, "__asn1_root__"):
+        annotated_root = field_type.__asn1_root__
+        if not isinstance(annotated_root, declarative_asn1.AnnotatedType):
+            raise TypeError(f"unsupported root type: {annotated_root}")
+        return annotated_root
+    else:
+        rust_field_type = declarative_asn1.non_root_python_to_rust(field_type)
+
+    return declarative_asn1.AnnotatedType(rust_field_type, annotation)
+
+
+def _annotate_fields(
+    raw_fields: dict[str, type],
+) -> dict[str, declarative_asn1.AnnotatedType]:
+    fields = {}
+    for field_name, field_type in raw_fields.items():
+        # Recursively normalize the field type into something that the
+        # Rust code can understand.
+        annotated_field_type = _normalize_field_type(field_type, field_name)
+        fields[field_name] = annotated_field_type
+
+    return fields
+
+
+def _register_asn1_sequence(cls: type[U]) -> None:
+    raw_fields = get_type_hints(cls, include_extras=True)
+    root = declarative_asn1.AnnotatedType(
+        declarative_asn1.Type.Sequence(cls, _annotate_fields(raw_fields)),
+        declarative_asn1.Annotation(),
+    )
+
+    setattr(cls, "__asn1_root__", root)
+
+
+# Due to https://github.com/python/mypy/issues/19731, we can't define an alias
+# for `dataclass_transform` that conditionally points to `typing` or
+# `typing_extensions` depending on the Python version (like we do for
+# `get_type_hints`).
+# We work around it by making the whole decorated class conditional on the
+# Python version.
+if sys.version_info < (3, 11):
+
+    @typing_extensions.dataclass_transform(kw_only_default=True)
+    def sequence(cls: type[U]) -> type[U]:
+        # We use `dataclasses.dataclass` to add an __init__ method
+        # to the class with keyword-only parameters.
+        if sys.version_info >= (3, 10):
+            dataclass_cls = dataclasses.dataclass(
+                repr=False,
+                eq=False,
+                # `match_args` was added in Python 3.10 and defaults
+                # to True
+                match_args=False,
+                # `kw_only` was added in Python 3.10 and defaults to
+                # False
+                kw_only=True,
+            )(cls)
+        else:
+            dataclass_cls = dataclasses.dataclass(
+                repr=False,
+                eq=False,
+            )(cls)
+        _register_asn1_sequence(dataclass_cls)
+        return dataclass_cls
+
+else:
+
+    @typing.dataclass_transform(kw_only_default=True)
+    def sequence(cls: type[U]) -> type[U]:
+        # Only add an __init__ method, with keyword-only
+        # parameters.
+        dataclass_cls = dataclasses.dataclass(
+            repr=False,
+            eq=False,
+            match_args=False,
+            kw_only=True,
+        )(cls)
+        _register_asn1_sequence(dataclass_cls)
+        return dataclass_cls

Backend/venv/lib/python3.12/site-packages/cryptography/hazmat/backends/openssl/aead.py

@@ -1,527 +0,0 @@
-# This file is dual licensed under the terms of the Apache License, Version
-# 2.0, and the BSD License. See the LICENSE file in the root of this repository
-# for complete details.
-
-from __future__ import annotations
-
-import typing
-
-from cryptography.exceptions import InvalidTag
-
-if typing.TYPE_CHECKING:
-    from cryptography.hazmat.backends.openssl.backend import Backend
-    from cryptography.hazmat.primitives.ciphers.aead import (
-        AESCCM,
-        AESGCM,
-        AESOCB3,
-        AESSIV,
-        ChaCha20Poly1305,
-    )
-
-    _AEADTypes = typing.Union[
-        AESCCM, AESGCM, AESOCB3, AESSIV, ChaCha20Poly1305
-    ]
-
-
-def _is_evp_aead_supported_cipher(
-    backend: Backend, cipher: _AEADTypes
-) -> bool:
-    """
-    Checks whether the given cipher is supported through
-    EVP_AEAD rather than the normal OpenSSL EVP_CIPHER API.
-    """
-    from cryptography.hazmat.primitives.ciphers.aead import ChaCha20Poly1305
-
-    return backend._lib.Cryptography_HAS_EVP_AEAD and isinstance(
-        cipher, ChaCha20Poly1305
-    )
-
-
-def _aead_cipher_supported(backend: Backend, cipher: _AEADTypes) -> bool:
-    if _is_evp_aead_supported_cipher(backend, cipher):
-        return True
-    else:
-        cipher_name = _evp_cipher_cipher_name(cipher)
-        if backend._fips_enabled and cipher_name not in backend._fips_aead:
-            return False
-        # SIV isn't loaded through get_cipherbyname but instead a new fetch API
-        # only available in 3.0+. But if we know we're on 3.0+ then we know
-        # it's supported.
-        if cipher_name.endswith(b"-siv"):
-            return backend._lib.CRYPTOGRAPHY_OPENSSL_300_OR_GREATER == 1
-        else:
-            return (
-                backend._lib.EVP_get_cipherbyname(cipher_name)
-                != backend._ffi.NULL
-            )
-
-
-def _aead_create_ctx(
-    backend: Backend,
-    cipher: _AEADTypes,
-    key: bytes,
-):
-    if _is_evp_aead_supported_cipher(backend, cipher):
-        return _evp_aead_create_ctx(backend, cipher, key)
-    else:
-        return _evp_cipher_create_ctx(backend, cipher, key)
-
-
-def _encrypt(
-    backend: Backend,
-    cipher: _AEADTypes,
-    nonce: bytes,
-    data: bytes,
-    associated_data: typing.List[bytes],
-    tag_length: int,
-    ctx: typing.Any = None,
-) -> bytes:
-    if _is_evp_aead_supported_cipher(backend, cipher):
-        return _evp_aead_encrypt(
-            backend, cipher, nonce, data, associated_data, tag_length, ctx
-        )
-    else:
-        return _evp_cipher_encrypt(
-            backend, cipher, nonce, data, associated_data, tag_length, ctx
-        )
-
-
-def _decrypt(
-    backend: Backend,
-    cipher: _AEADTypes,
-    nonce: bytes,
-    data: bytes,
-    associated_data: typing.List[bytes],
-    tag_length: int,
-    ctx: typing.Any = None,
-) -> bytes:
-    if _is_evp_aead_supported_cipher(backend, cipher):
-        return _evp_aead_decrypt(
-            backend, cipher, nonce, data, associated_data, tag_length, ctx
-        )
-    else:
-        return _evp_cipher_decrypt(
-            backend, cipher, nonce, data, associated_data, tag_length, ctx
-        )
-
-
-def _evp_aead_create_ctx(
-    backend: Backend,
-    cipher: _AEADTypes,
-    key: bytes,
-    tag_len: typing.Optional[int] = None,
-):
-    aead_cipher = _evp_aead_get_cipher(backend, cipher)
-    assert aead_cipher is not None
-    key_ptr = backend._ffi.from_buffer(key)
-    tag_len = (
-        backend._lib.EVP_AEAD_DEFAULT_TAG_LENGTH
-        if tag_len is None
-        else tag_len
-    )
-    ctx = backend._lib.Cryptography_EVP_AEAD_CTX_new(
-        aead_cipher, key_ptr, len(key), tag_len
-    )
-    backend.openssl_assert(ctx != backend._ffi.NULL)
-    ctx = backend._ffi.gc(ctx, backend._lib.EVP_AEAD_CTX_free)
-    return ctx
-
-
-def _evp_aead_get_cipher(backend: Backend, cipher: _AEADTypes):
-    from cryptography.hazmat.primitives.ciphers.aead import (
-        ChaCha20Poly1305,
-    )
-
-    # Currently only ChaCha20-Poly1305 is supported using this API
-    assert isinstance(cipher, ChaCha20Poly1305)
-    return backend._lib.EVP_aead_chacha20_poly1305()
-
-
-def _evp_aead_encrypt(
-    backend: Backend,
-    cipher: _AEADTypes,
-    nonce: bytes,
-    data: bytes,
-    associated_data: typing.List[bytes],
-    tag_length: int,
-    ctx: typing.Any,
-) -> bytes:
-    assert ctx is not None
-
-    aead_cipher = _evp_aead_get_cipher(backend, cipher)
-    assert aead_cipher is not None
-
-    out_len = backend._ffi.new("size_t *")
-    # max_out_len should be in_len plus the result of
-    # EVP_AEAD_max_overhead.
-    max_out_len = len(data) + backend._lib.EVP_AEAD_max_overhead(aead_cipher)
-    out_buf = backend._ffi.new("uint8_t[]", max_out_len)
-    data_ptr = backend._ffi.from_buffer(data)
-    nonce_ptr = backend._ffi.from_buffer(nonce)
-    aad = b"".join(associated_data)
-    aad_ptr = backend._ffi.from_buffer(aad)
-
-    res = backend._lib.EVP_AEAD_CTX_seal(
-        ctx,
-        out_buf,
-        out_len,
-        max_out_len,
-        nonce_ptr,
-        len(nonce),
-        data_ptr,
-        len(data),
-        aad_ptr,
-        len(aad),
-    )
-    backend.openssl_assert(res == 1)
-    encrypted_data = backend._ffi.buffer(out_buf, out_len[0])[:]
-    return encrypted_data
-
-
-def _evp_aead_decrypt(
-    backend: Backend,
-    cipher: _AEADTypes,
-    nonce: bytes,
-    data: bytes,
-    associated_data: typing.List[bytes],
-    tag_length: int,
-    ctx: typing.Any,
-) -> bytes:
-    if len(data) < tag_length:
-        raise InvalidTag
-
-    assert ctx is not None
-
-    out_len = backend._ffi.new("size_t *")
-    #  max_out_len should at least in_len
-    max_out_len = len(data)
-    out_buf = backend._ffi.new("uint8_t[]", max_out_len)
-    data_ptr = backend._ffi.from_buffer(data)
-    nonce_ptr = backend._ffi.from_buffer(nonce)
-    aad = b"".join(associated_data)
-    aad_ptr = backend._ffi.from_buffer(aad)
-
-    res = backend._lib.EVP_AEAD_CTX_open(
-        ctx,
-        out_buf,
-        out_len,
-        max_out_len,
-        nonce_ptr,
-        len(nonce),
-        data_ptr,
-        len(data),
-        aad_ptr,
-        len(aad),
-    )
-
-    if res == 0:
-        backend._consume_errors()
-        raise InvalidTag
-
-    decrypted_data = backend._ffi.buffer(out_buf, out_len[0])[:]
-    return decrypted_data
-
-
-_ENCRYPT = 1
-_DECRYPT = 0
-
-
-def _evp_cipher_cipher_name(cipher: _AEADTypes) -> bytes:
-    from cryptography.hazmat.primitives.ciphers.aead import (
-        AESCCM,
-        AESGCM,
-        AESOCB3,
-        AESSIV,
-        ChaCha20Poly1305,
-    )
-
-    if isinstance(cipher, ChaCha20Poly1305):
-        return b"chacha20-poly1305"
-    elif isinstance(cipher, AESCCM):
-        return f"aes-{len(cipher._key) * 8}-ccm".encode("ascii")
-    elif isinstance(cipher, AESOCB3):
-        return f"aes-{len(cipher._key) * 8}-ocb".encode("ascii")
-    elif isinstance(cipher, AESSIV):
-        return f"aes-{len(cipher._key) * 8 // 2}-siv".encode("ascii")
-    else:
-        assert isinstance(cipher, AESGCM)
-        return f"aes-{len(cipher._key) * 8}-gcm".encode("ascii")
-
-
-def _evp_cipher(cipher_name: bytes, backend: Backend):
-    if cipher_name.endswith(b"-siv"):
-        evp_cipher = backend._lib.EVP_CIPHER_fetch(
-            backend._ffi.NULL,
-            cipher_name,
-            backend._ffi.NULL,
-        )
-        backend.openssl_assert(evp_cipher != backend._ffi.NULL)
-        evp_cipher = backend._ffi.gc(evp_cipher, backend._lib.EVP_CIPHER_free)
-    else:
-        evp_cipher = backend._lib.EVP_get_cipherbyname(cipher_name)
-        backend.openssl_assert(evp_cipher != backend._ffi.NULL)
-
-    return evp_cipher
-
-
-def _evp_cipher_create_ctx(
-    backend: Backend,
-    cipher: _AEADTypes,
-    key: bytes,
-):
-    ctx = backend._lib.EVP_CIPHER_CTX_new()
-    backend.openssl_assert(ctx != backend._ffi.NULL)
-    ctx = backend._ffi.gc(ctx, backend._lib.EVP_CIPHER_CTX_free)
-    cipher_name = _evp_cipher_cipher_name(cipher)
-    evp_cipher = _evp_cipher(cipher_name, backend)
-    key_ptr = backend._ffi.from_buffer(key)
-    res = backend._lib.EVP_CipherInit_ex(
-        ctx,
-        evp_cipher,
-        backend._ffi.NULL,
-        key_ptr,
-        backend._ffi.NULL,
-        0,
-    )
-    backend.openssl_assert(res != 0)
-    return ctx
-
-
-def _evp_cipher_aead_setup(
-    backend: Backend,
-    cipher_name: bytes,
-    key: bytes,
-    nonce: bytes,
-    tag: typing.Optional[bytes],
-    tag_len: int,
-    operation: int,
-):
-    evp_cipher = _evp_cipher(cipher_name, backend)
-    ctx = backend._lib.EVP_CIPHER_CTX_new()
-    ctx = backend._ffi.gc(ctx, backend._lib.EVP_CIPHER_CTX_free)
-    res = backend._lib.EVP_CipherInit_ex(
-        ctx,
-        evp_cipher,
-        backend._ffi.NULL,
-        backend._ffi.NULL,
-        backend._ffi.NULL,
-        int(operation == _ENCRYPT),
-    )
-    backend.openssl_assert(res != 0)
-    # CCM requires the IVLEN to be set before calling SET_TAG on decrypt
-    res = backend._lib.EVP_CIPHER_CTX_ctrl(
-        ctx,
-        backend._lib.EVP_CTRL_AEAD_SET_IVLEN,
-        len(nonce),
-        backend._ffi.NULL,
-    )
-    backend.openssl_assert(res != 0)
-    if operation == _DECRYPT:
-        assert tag is not None
-        _evp_cipher_set_tag(backend, ctx, tag)
-    elif cipher_name.endswith(b"-ccm"):
-        res = backend._lib.EVP_CIPHER_CTX_ctrl(
-            ctx,
-            backend._lib.EVP_CTRL_AEAD_SET_TAG,
-            tag_len,
-            backend._ffi.NULL,
-        )
-        backend.openssl_assert(res != 0)
-
-    nonce_ptr = backend._ffi.from_buffer(nonce)
-    key_ptr = backend._ffi.from_buffer(key)
-    res = backend._lib.EVP_CipherInit_ex(
-        ctx,
-        backend._ffi.NULL,
-        backend._ffi.NULL,
-        key_ptr,
-        nonce_ptr,
-        int(operation == _ENCRYPT),
-    )
-    backend.openssl_assert(res != 0)
-    return ctx
-
-
-def _evp_cipher_set_tag(backend, ctx, tag: bytes) -> None:
-    tag_ptr = backend._ffi.from_buffer(tag)
-    res = backend._lib.EVP_CIPHER_CTX_ctrl(
-        ctx, backend._lib.EVP_CTRL_AEAD_SET_TAG, len(tag), tag_ptr
-    )
-    backend.openssl_assert(res != 0)
-
-
-def _evp_cipher_set_nonce_operation(
-    backend, ctx, nonce: bytes, operation: int
-) -> None:
-    nonce_ptr = backend._ffi.from_buffer(nonce)
-    res = backend._lib.EVP_CipherInit_ex(
-        ctx,
-        backend._ffi.NULL,
-        backend._ffi.NULL,
-        backend._ffi.NULL,
-        nonce_ptr,
-        int(operation == _ENCRYPT),
-    )
-    backend.openssl_assert(res != 0)
-
-
-def _evp_cipher_set_length(backend: Backend, ctx, data_len: int) -> None:
-    intptr = backend._ffi.new("int *")
-    res = backend._lib.EVP_CipherUpdate(
-        ctx, backend._ffi.NULL, intptr, backend._ffi.NULL, data_len
-    )
-    backend.openssl_assert(res != 0)
-
-
-def _evp_cipher_process_aad(
-    backend: Backend, ctx, associated_data: bytes
-) -> None:
-    outlen = backend._ffi.new("int *")
-    a_data_ptr = backend._ffi.from_buffer(associated_data)
-    res = backend._lib.EVP_CipherUpdate(
-        ctx, backend._ffi.NULL, outlen, a_data_ptr, len(associated_data)
-    )
-    backend.openssl_assert(res != 0)
-
-
-def _evp_cipher_process_data(backend: Backend, ctx, data: bytes) -> bytes:
-    outlen = backend._ffi.new("int *")
-    buf = backend._ffi.new("unsigned char[]", len(data))
-    data_ptr = backend._ffi.from_buffer(data)
-    res = backend._lib.EVP_CipherUpdate(ctx, buf, outlen, data_ptr, len(data))
-    if res == 0:
-        # AES SIV can error here if the data is invalid on decrypt
-        backend._consume_errors()
-        raise InvalidTag
-    return backend._ffi.buffer(buf, outlen[0])[:]
-
-
-def _evp_cipher_encrypt(
-    backend: Backend,
-    cipher: _AEADTypes,
-    nonce: bytes,
-    data: bytes,
-    associated_data: typing.List[bytes],
-    tag_length: int,
-    ctx: typing.Any = None,
-) -> bytes:
-    from cryptography.hazmat.primitives.ciphers.aead import AESCCM, AESSIV
-
-    if ctx is None:
-        cipher_name = _evp_cipher_cipher_name(cipher)
-        ctx = _evp_cipher_aead_setup(
-            backend,
-            cipher_name,
-            cipher._key,
-            nonce,
-            None,
-            tag_length,
-            _ENCRYPT,
-        )
-    else:
-        _evp_cipher_set_nonce_operation(backend, ctx, nonce, _ENCRYPT)
-
-    # CCM requires us to pass the length of the data before processing
-    # anything.
-    # However calling this with any other AEAD results in an error
-    if isinstance(cipher, AESCCM):
-        _evp_cipher_set_length(backend, ctx, len(data))
-
-    for ad in associated_data:
-        _evp_cipher_process_aad(backend, ctx, ad)
-    processed_data = _evp_cipher_process_data(backend, ctx, data)
-    outlen = backend._ffi.new("int *")
-    # All AEADs we support besides OCB are streaming so they return nothing
-    # in finalization. OCB can return up to (16 byte block - 1) bytes so
-    # we need a buffer here too.
-    buf = backend._ffi.new("unsigned char[]", 16)
-    res = backend._lib.EVP_CipherFinal_ex(ctx, buf, outlen)
-    backend.openssl_assert(res != 0)
-    processed_data += backend._ffi.buffer(buf, outlen[0])[:]
-    tag_buf = backend._ffi.new("unsigned char[]", tag_length)
-    res = backend._lib.EVP_CIPHER_CTX_ctrl(
-        ctx, backend._lib.EVP_CTRL_AEAD_GET_TAG, tag_length, tag_buf
-    )
-    backend.openssl_assert(res != 0)
-    tag = backend._ffi.buffer(tag_buf)[:]
-
-    if isinstance(cipher, AESSIV):
-        # RFC 5297 defines the output as IV || C, where the tag we generate
-        # is the "IV" and C is the ciphertext. This is the opposite of our
-        # other AEADs, which are Ciphertext || Tag
-        backend.openssl_assert(len(tag) == 16)
-        return tag + processed_data
-    else:
-        return processed_data + tag
-
-
-def _evp_cipher_decrypt(
-    backend: Backend,
-    cipher: _AEADTypes,
-    nonce: bytes,
-    data: bytes,
-    associated_data: typing.List[bytes],
-    tag_length: int,
-    ctx: typing.Any = None,
-) -> bytes:
-    from cryptography.hazmat.primitives.ciphers.aead import AESCCM, AESSIV
-
-    if len(data) < tag_length:
-        raise InvalidTag
-
-    if isinstance(cipher, AESSIV):
-        # RFC 5297 defines the output as IV || C, where the tag we generate
-        # is the "IV" and C is the ciphertext. This is the opposite of our
-        # other AEADs, which are Ciphertext || Tag
-        tag = data[:tag_length]
-        data = data[tag_length:]
-    else:
-        tag = data[-tag_length:]
-        data = data[:-tag_length]
-    if ctx is None:
-        cipher_name = _evp_cipher_cipher_name(cipher)
-        ctx = _evp_cipher_aead_setup(
-            backend,
-            cipher_name,
-            cipher._key,
-            nonce,
-            tag,
-            tag_length,
-            _DECRYPT,
-        )
-    else:
-        _evp_cipher_set_nonce_operation(backend, ctx, nonce, _DECRYPT)
-        _evp_cipher_set_tag(backend, ctx, tag)
-
-    # CCM requires us to pass the length of the data before processing
-    # anything.
-    # However calling this with any other AEAD results in an error
-    if isinstance(cipher, AESCCM):
-        _evp_cipher_set_length(backend, ctx, len(data))
-
-    for ad in associated_data:
-        _evp_cipher_process_aad(backend, ctx, ad)
-    # CCM has a different error path if the tag doesn't match. Errors are
-    # raised in Update and Final is irrelevant.
-    if isinstance(cipher, AESCCM):
-        outlen = backend._ffi.new("int *")
-        buf = backend._ffi.new("unsigned char[]", len(data))
-        d_ptr = backend._ffi.from_buffer(data)
-        res = backend._lib.EVP_CipherUpdate(ctx, buf, outlen, d_ptr, len(data))
-        if res != 1:
-            backend._consume_errors()
-            raise InvalidTag
-
-        processed_data = backend._ffi.buffer(buf, outlen[0])[:]
-    else:
-        processed_data = _evp_cipher_process_data(backend, ctx, data)
-        outlen = backend._ffi.new("int *")
-        # OCB can return up to 15 bytes (16 byte block - 1) in finalization
-        buf = backend._ffi.new("unsigned char[]", 16)
-        res = backend._lib.EVP_CipherFinal_ex(ctx, buf, outlen)
-        processed_data += backend._ffi.buffer(buf, outlen[0])[:]
-        if res == 0:
-            backend._consume_errors()
-            raise InvalidTag
-
-    return processed_data