[BUG] OPC UA identification by user/password fails 'uacrypto' is not defined

[ysimonx]

I am trying to connect an OPCUA Server configured with an user/password access : the connexion fails

while I am able to connect anonymously, when i configure the opcua connexion with a username and a password

 "identity": {
      "username": "operator",
      "password": "operator"
    },

the OPC UA connexion is not done beetween thingsboard-gateway and OPC UA Server (loytec device)

when I Try this connexion with another OPC UA client (prosys) : the connexion is ok

so this is really a thingsboard-gateway issue

OPC-UA Connector:

Error traceback:

""2022-02-09 16:58:56" - |ERROR| - [opcua_connector.py] - opcua_connector - __connect - 130 - name 'uacrypto' is not defined"
""2022-02-09 16:59:07" - |ERROR| - [opcua_connector.py] - opcua_connector - __connect - 130 - name 'uacrypto' is not defined"
""2022-02-09 16:59:17" - |ERROR| - [opcua_connector.py] - opcua_connector - __connect - 130 - name 'uacrypto' is not defined"
""2022-02-09 16:59:27" - |ERROR| - [opcua_connector.py] - opcua_connector - __connect - 130 - name 'uacrypto' is not defined"
""2022-02-09 16:59:38" - |ERROR| - [opcua_connector.py] - opcua_connector - __connect - 130 - name 'uacrypto' is not defined"

Versions from master branch of thingsboard-gateway :

• OS: MAC OSx
• Thingsboard IoT Gateway version 3.0.1
• Python version 3.9

[imbeacon]

Hi @ysimonx ,

Please try to install the package cryptography. You can do this with the following command:

pip3 install cryptography

[ysimonx]

Yes, I just found this solution

I will propose a fix like this :

try:   
    from opcua.crypto import uacrypto
except ImportError:
    TBUtility.install_package("cryptography")
    from opcua.crypto import uacrypto

With this code, i manage to connect !

Thank you @zbeacon

[imbeacon]

Yes, It is probably the best solution for issues like this. Cryptography should installs during setup and it is strange that it wasn't install.

[ysimonx]

@zbeacon : PR https://github.com/thingsboard/thingsboard-gateway/pull/742 ;-)

thank you

[imbeacon]

@ysimonx Thank you for your participating in the project life. We appreciate it.