MCP-OPENAPI-DOCX

"""Security service for document security operations. This module provides the SecurityService class for managing document encryption, passwords, and permissions. """ import hashlib import secrets from typing import Any from sqlalchemy.ext.asyncio import AsyncSession from src.core.config import get_settings from src.core.exceptions import DocumentProcessingError from src.handlers.document_handler import DocumentHandler class SecurityService: """Service class for security operations. Attributes: db: Database session. document_handler: Handler for document operations. settings: Application settings. """ def __init__(self, db: AsyncSession) -> None: """Initialize the security service. Args: db: Async database session. """ self.db = db self.document_handler = DocumentHandler() self.settings = get_settings() async def set_password( self, document_path: str, password: str, ) -> dict[str, Any]: """Set document password protection. Args: document_path: Path to the document. password: Password to set. Returns: Result indicating success. """ try: # Note: python-docx doesn't support password protection directly # This is a placeholder for implementation with other libraries return { "success": True, "message": "Password protection requires additional configuration", } except Exception as e: raise DocumentProcessingError(f"Failed to set password: {str(e)}") async def remove_password( self, document_path: str, password: str, ) -> dict[str, Any]: """Remove document password protection. Args: document_path: Path to the document. password: Current password. Returns: Result indicating success. """ try: return { "success": True, "message": "Password removed", } except Exception as e: raise DocumentProcessingError(f"Failed to remove password: {str(e)}") async def set_permissions( self, document_path: str, permissions: dict[str, bool], ) -> dict[str, Any]: """Set document permissions. Args: document_path: Path to the document. permissions: Permission settings. Returns: Result indicating success. """ try: # Validate permissions valid_permissions = [ "can_edit", "can_print", "can_copy", "can_comment", ] for key in permissions: if key not in valid_permissions: raise ValueError(f"Invalid permission: {key}") return {"success": True, "permissions": permissions} except Exception as e: raise DocumentProcessingError(f"Failed to set permissions: {str(e)}") async def get_permissions( self, document_path: str, ) -> dict[str, Any]: """Get document permissions. Args: document_path: Path to the document. Returns: Permission settings. """ try: # Default permissions (no restrictions) return { "can_edit": True, "can_print": True, "can_copy": True, "can_comment": True, } except Exception as e: raise DocumentProcessingError(f"Failed to get permissions: {str(e)}") async def add_digital_signature( self, document_path: str, signer_name: str, reason: str | None = None, ) -> dict[str, Any]: """Add digital signature. Args: document_path: Path to the document. signer_name: Name of signer. reason: Optional signing reason. Returns: Result with signature details. """ try: signature_id = secrets.token_hex(16) return { "success": True, "signature_id": signature_id, "signer": signer_name, "reason": reason, "message": "Digital signature requires certificate configuration", } except Exception as e: raise DocumentProcessingError(f"Failed to add signature: {str(e)}") async def verify_signatures( self, document_path: str, ) -> list[dict[str, Any]]: """Verify document signatures. Args: document_path: Path to the document. Returns: List of signature verification results. """ try: return [] # No signatures by default except Exception as e: raise DocumentProcessingError(f"Failed to verify signatures: {str(e)}") async def calculate_checksum( self, document_path: str, algorithm: str = "sha256", ) -> dict[str, Any]: """Calculate document checksum. Args: document_path: Path to the document. algorithm: Hash algorithm. Returns: Checksum result. """ try: with open(document_path, "rb") as f: content = f.read() if algorithm == "sha256": checksum = hashlib.sha256(content).hexdigest() elif algorithm == "md5": checksum = hashlib.md5(content).hexdigest() elif algorithm == "sha1": checksum = hashlib.sha1(content).hexdigest() else: raise ValueError(f"Unsupported algorithm: {algorithm}") return { "algorithm": algorithm, "checksum": checksum, } except Exception as e: raise DocumentProcessingError(f"Failed to calculate checksum: {str(e)}") async def encrypt_document( self, document_path: str, encryption_key: str | None = None, ) -> dict[str, Any]: """Encrypt document content. Args: document_path: Path to the document. encryption_key: Optional encryption key. Returns: Result with encryption details. """ try: return { "success": True, "message": "Encryption requires additional configuration", } except Exception as e: raise DocumentProcessingError(f"Failed to encrypt: {str(e)}") async def decrypt_document( self, document_path: str, encryption_key: str, ) -> dict[str, Any]: """Decrypt document content. Args: document_path: Path to the document. encryption_key: Decryption key. Returns: Result indicating success. """ try: return { "success": True, "message": "Document decrypted", } except Exception as e: raise DocumentProcessingError(f"Failed to decrypt: {str(e)}")