I can help you set up a Python server using GMSSL with the ECC_SM4_SM3 cipher suite (0xe0,0x13) and mutual certificate authentication. This setup uses Chinese national cryptographic standards, which are different from the more common SSL/TLS standards.

First, let's break down what we're dealing with:

1. GMSSL: This is an implementation of Chinese national cryptographic standards.

2. ECC_SM4_SM3 (0xe0,0x13): This is a cipher suite that uses:

   • ECC (Elliptic Curve Cryptography) for key exchange
   • SM4 for symmetric encryption
   • SM3 for hashing
3. Mutual (two-way) certificate authentication: Both the server and client need to verify each other's certificates.

Here's a Python script that demonstrates how to set up such a server:

This script does the following:

1. Imports necessary modules from GMSSL and Python's standard library.
2. Defines utility functions for key generation, SM4 encryption/decryption, and SM3 signing/verification.
3. Sets up a server socket that listens for incoming connections.

4. When a client connects:

   • The server sends its public key to the client.
   • The server receives the client's public key.
   • The server generates a session key, encrypts it with the client's public key, and sends it to the client.
   • The server signs some data, encrypts it with the session key, and sends both the signature and encrypted data to the client.

Note that this is a basic implementation and doesn't include all aspects of a production-ready server. In a real-world scenario, you would need to:

1. Implement proper error handling and logging.
2. Use actual certificates instead of just public keys.
3. Implement a full handshake protocol.
4. Handle multiple clients concurrently.
5. Implement session management and key rotation.

To run this server, you'll need to install the gmssl package:

Remember that using national cryptographic standards may have legal and regulatory implications, especially when used internationally. Always ensure you're complying with relevant laws and regulations.

For a complete system, you'd also need to implement a corresponding client that can connect to this server, verify the server's certificate, present its own certificate, and communicate using the agreed-upon cipher suite.