fix: impl quic listener

libp2p/transport/quic/security.py

@@ -0,0 +1,123 @@
+"""
+Basic QUIC Security implementation for Module 1.
+This provides minimal TLS configuration for QUIC transport.
+Full implementation will be in Module 5.
+"""
+
+from dataclasses import dataclass
+import os
+import tempfile
+from typing import Optional
+
+from libp2p.crypto.keys import PrivateKey
+from libp2p.peer.id import ID
+
+from .exceptions import QUICSecurityError
+
+
+@dataclass
+class TLSConfig:
+    """TLS configuration for QUIC transport."""
+
+    cert_file: str
+    key_file: str
+    ca_file: Optional[str] = None
+
+
+def generate_libp2p_tls_config(private_key: PrivateKey, peer_id: ID) -> TLSConfig:
+    """
+    Generate TLS configuration with libp2p peer identity.
+
+    This is a basic implementation for Module 1.
+    Full implementation with proper libp2p TLS spec compliance
+    will be provided in Module 5.
+
+    Args:
+        private_key: libp2p private key
+        peer_id: libp2p peer ID
+
+    Returns:
+        TLS configuration
+
+    Raises:
+        QUICSecurityError: If TLS configuration generation fails
+
+    """
+    try:
+        # TODO: Implement proper libp2p TLS certificate generation
+        # This should follow the libp2p TLS specification:
+        # https://github.com/libp2p/specs/blob/master/tls/tls.md
+
+        # For now, create a basic self-signed certificate
+        # This is a placeholder implementation
+
+        # Create temporary files for cert and key
+        with tempfile.NamedTemporaryFile(
+            mode="w", suffix=".pem", delete=False
+        ) as cert_file:
+            cert_path = cert_file.name
+            # Write placeholder certificate
+            cert_file.write(_generate_placeholder_cert(peer_id))
+
+        with tempfile.NamedTemporaryFile(
+            mode="w", suffix=".key", delete=False
+        ) as key_file:
+            key_path = key_file.name
+            # Write placeholder private key
+            key_file.write(_generate_placeholder_key(private_key))
+
+        return TLSConfig(cert_file=cert_path, key_file=key_path)
+
+    except Exception as e:
+        raise QUICSecurityError(f"Failed to generate TLS config: {e}") from e
+
+
+def _generate_placeholder_cert(peer_id: ID) -> str:
+    """
+    Generate a placeholder certificate.
+
+    This is a temporary implementation for Module 1.
+    Real implementation will embed the peer ID in the certificate
+    following the libp2p TLS specification.
+    """
+    # This is a placeholder - real implementation needed
+    return f"""-----BEGIN CERTIFICATE-----
+# Placeholder certificate for peer {peer_id}
+# TODO: Implement proper libp2p TLS certificate generation
+# This should embed the peer ID in a certificate extension
+# according to the libp2p TLS specification
+-----END CERTIFICATE-----"""
+
+
+def _generate_placeholder_key(private_key: PrivateKey) -> str:
+    """
+    Generate a placeholder private key.
+
+    This is a temporary implementation for Module 1.
+    Real implementation will use the actual libp2p private key.
+    """
+    # This is a placeholder - real implementation needed
+    return """-----BEGIN PRIVATE KEY-----
+# Placeholder private key
+# TODO: Convert libp2p private key to TLS-compatible format
+-----END PRIVATE KEY-----"""
+
+
+def cleanup_tls_config(config: TLSConfig) -> None:
+    """
+    Clean up temporary TLS files.
+
+    Args:
+        config: TLS configuration to clean up
+
+    """
+    try:
+        if os.path.exists(config.cert_file):
+            os.unlink(config.cert_file)
+        if os.path.exists(config.key_file):
+            os.unlink(config.key_file)
+        if config.ca_file and os.path.exists(config.ca_file):
+            os.unlink(config.ca_file)
+    except Exception:
+        # Ignore cleanup errors
+        pass