| [milo-dev] Create java a opc client using milo with an OPC UA Server with secure connection |
I am trying to create a opc ua client with java using milo library. I need to connect with an OPC Server which uses http://opcfoundation.org/UA/SecurityPolicy#Basic256Sha256 Security Policy in addition i need to authenticate the user with certificates.
I am having the following error in the client "The user identity token is valid but the server has rejected it" which corresponds with the opc ua error "UA_SCBADIDENTITYTOKENREJECTED 0x80210000". I can look for the server information and i have the following log information "Verification of UserTokenSignature failed".
I have investigate the topic and it seems that the UserTokenSignature has not been created properly, I think that it could be because of the nonce, but i am not sure, i have had a look to the wireshark information and in the startup of the communication the client does not include any nonce. In my tests using Ua Expert (which create the secure connection and authenticates the user) the first message from the client includes the nonce.
I do not know if it is necessary to configure any property in the client to include the nonce, i think that it should be included automatically.
Maybe the "Verification of UserTokenSignature failed" error is caused because of an error in the certificates, i do not know, but i have tested the connection with UA Expert and it works properly.