Security policy in OPCUA

[vidyarao123]

I have included all 3 levels of security in my code. None, Sign, Sign and Encrypt.

server = Server()
url = "opc.tcp://127.0.0.1:4840"
server.set_endpoint(url)
security_policy = [ua.SecurityPolicyType.NoSecurity, ua.SecurityPolicyType.Basic256Sha256_SignAndEncrypt, ua.SecurityPolicyType.Basic256Sha256_Sign]
server.set_security_policy(security_policy)

But when I browse through UA Expert. Only none option displays. I am not able to see the other two security policies (Sign , Sign and Encrypt). Can somebody tell me if I am missing anything here.

[AndreasHeine]

Do you have a certificate and a privatekey for you application? u cant run sign or sign and encrypt without it!!!

[AndreasHeine]

https://github.com/FreeOpcUa/python-opcua/blob/master/examples/server-with-encryption.py

but please dont use the example certificate and key in production!

[vidyarao123]

Hi,
sorry for my late reply. I do not have a certificate or a private key. Could you please tell me how do I generate one ?

I did search on google on how to generate these but it was not successful.

[AndreasHeine]

https://github.com/FreeOpcUa/python-opcua/blob/master/examples/generate_certificate.sh

you should study the examples and most opc ua related stuff you can find here: https://reference.opcfoundation.org/v104/

get the basics of opcua first (makes dev life easier)