Re: [I] [Bug]: Umati Sample Server BadIdentityTokenInvalid

["iho-sar (via GitHub)" <gi...@apache.org>]

iho-sar commented on issue #2154:
URL: https://github.com/apache/plc4x/issues/2154#issuecomment-4923105915

   Hello, I think I am seeing the same or a very similar problem here.
   
   I already tried a lot of different variants, but I still cannot connect to our Siemens SPS Simulation Server via PLC4X, while UaExpert works without issues.
   
   In my case:
   - OPC UA server security policy is set to `None`
   - authentication is done via `UserName`
   - PLC4X fails with `BadIdentityTokenInvalid (0x80200000)`
   
   From the PLC4X debug logs it looks like endpoint discovery, SecureChannel, and CreateSession work correctly, but `ActivateSession` fails.
   
   What looks suspicious in the logs is that PLC4X sends a `UserName` token with a policy like `UserName_Basic128Rsa15_Token`, and then the server rejects it with `BadIdentityTokenInvalid`.
   
   UaExpert can connect to the same server with the same credentials.
   
   So from my perspective this may not only be a special character issue, but possibly also a problem with how PLC4X selects or encodes the OPC UA `UserIdentityToken` for some servers, especially Siemens.
   
   If helpful, I can also share my debug logs.


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