{"library":"pyspnego","title":"Python SPNEGO Authentication Library","description":"pyspnego is a Python library designed to handle SPNEGO (Negotiate, NTLM, Kerberos) and CredSSP authentication, offering a unified interface across different operating systems. It leverages SSPI on Windows and GSSAPI on Linux, and also includes a utility for parsing raw NTLM/SPNEGO/Kerberos tokens. The library is actively maintained, with version 0.12.1 released on March 2, 2026, and follows a regular release cadence.","language":"python","status":"active","last_verified":"Tue May 19","install":{"commands":["pip install pyspnego","pip install pyspnego[kerberos]"],"cli":null},"imports":["import spnego.client","import spnego.server"],"auth":{"required":false,"env_vars":[]},"quickstart":{"code":"import spnego\nimport os\n\n# Example for a client initiating a Negotiate (SPNEGO) context\n# Replace with actual credentials or environment variables\nusername = os.environ.get('SPNEGO_USERNAME', 'testuser')\npassword = os.environ.get('SPNEGO_PASSWORD', 'testpassword')\nservice_principal_name = os.environ.get('SPNEGO_SPN', 'HTTP@myservice.example.com')\n\ntry:\n    # Create a client context. 'negotiate' is the default protocol.\n    # For NTLM: protocol='ntlm'\n    # For Kerberos: protocol='kerberos' (requires system GSSAPI/Kerberos libs on Linux)\n    client_context = spnego.client.Context(\n        username=username,\n        password=password,\n        hostname=service_principal_name.split('@')[1] if '@' in service_principal_name else None,\n        service=service_principal_name.split('@')[0] if '@' in service_principal_name else None,\n        protocol='negotiate'\n    )\n\n    # The client typically sends an initial token\n    initial_token = client_context.step()\n\n    print(f\"Initial SPNEGO token (base64 encoded): {initial_token.decode('utf-8')}\")\n\n    # In a real scenario, this token would be sent to the server,\n    # which would then return a response token. The client would then\n    # call client_context.step(server_response_token) until complete.\n\nexcept spnego.exceptions.NegotiateError as e:\n    print(f\"Authentication error: {e}\")\nexcept Exception as e:\n    print(f\"An unexpected error occurred: {e}\")","lang":"python","description":"This quickstart demonstrates how to create a client-side SPNEGO authentication context using `pyspnego`. It initializes a client context with provided (or environment variable sourced) credentials and generates an initial authentication token. 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