How to generate sm2 certificates used in TLS communication?

[Yang-Ziyi-123987]

1. How can SM2 certificates used in TLS be generated by the SMbedTLS library?
2. Can TLS authentication communication be carried out using the SM2 certificate generated by gmssl?
3. Could you please take a look at the source code in the attachment for the SM2 certificate two-way identity authentication and SM4 encrypted communication and let me know how it can be improved?
   Thank you！

issues of smbedtls.zip