msoffcrypto-tool

import io import os from msoffcrypto import OfficeFile, exceptions # --- IMPORTANT --- # This example demonstrates the API usage. The `encrypted_content` below is # NOT a real encrypted MS Office file and will not successfully decrypt. # For actual decryption, replace it with content read from a real encrypted file. # A minimal OLE header (not a full encrypted file) for API demonstration. # A real encrypted file starts with this and contains specific crypto structures. encrypted_content = b"\xD0\xCF\x11\xE0\xA1\xB1\x1A\xE1\x00\x00\x00\x00\x00\x00\x00\x00" \ + b"\x00" * 4000 # Placeholder for file content # Simulate reading an encrypted file encrypted_file_stream = io.BytesIO(encrypted_content) # Simulate an output file for decrypted content decrypted_file_stream = io.BytesIO() # Get password from environment variable or set a default placeholder password = os.environ.get('MSOFFCRYPTO_PASSWORD', 'YourStrongPassword') try: # Initialize OfficeFile with the encrypted stream office_file = OfficeFile(encrypted_file_stream) # Load the decryption key using the password office_file.load_key(password=password) # Decrypt the file to the output stream office_file.decrypt(decrypted_file_stream) print("API usage demonstrated successfully. Output stream has data.") # In a real scenario, decrypted_file_stream.getvalue() would contain the decrypted file content. except exceptions.InvalidKeyError: print("Decryption failed: Invalid password.") except exceptions.FileFormatError as e: print(f"Decryption failed: Invalid file format. {e}") except Exception as e: print(f"An unexpected error occurred: {e}") # Reset stream position if you want to read it again encrypted_file_stream.seek(0) decrypted_file_stream.seek(0)