MinimalAuthentication

About the "MinimalAuthentication" sample

The "MinimalAuthentication" extension is the simplest possible authentication extension. It uses the "AuthListener" interface to handle authentication of a single hard-coded user account:

Username: "admin"
Password: "123"

Also, it uses the "RequestListener" interface to implement the "ListUsers" function symbol that all authentication extensions must implement.

Authentication extensions only handle authentication, whereas the HMI server handles account settings, permissions, auto-logout, and group memberships. This sample also showcases how extensions can register user accounts in the HMI server's configuration ("TcHmiSrv.Config").

First steps:

• Working with server extensions
• Interacting with a server extension

Example requests

1. Login request for the user account provided by the "MinimalAuthentication" extension.

   Request:

   {
       "requestType": "ReadWrite",
       "commands": [
           {
               "symbol": "Login",
               "writeValue": {
                   "userName": "MinimalAuthentication::admin",
                   "password": "123"
               },
               "commandOptions": [ "SendErrorMessage", "SendWriteValue" ]
           }
       ]
   }

2. List the names of all usernames provided by the "MinimalAuthentication" extension.

   Request:

   {
       "requestType": "ReadWrite",
       "commands": [
           {
               "symbol": "MinimalAuthentication.ListUsers",
               "commandOptions": [ "SendErrorMessage" ]
           }
       ]
   }

   Response:

   {
       "requestType": "ReadWrite",
       "commands": [
           {
               "symbol": "MinimalAuthentication.ListUsers",
               "readValue": [ "admin" ]
           }
       ]
   }

3. Show the account settings of the "MinimalAuthentication" accounts registered in the HMI server's configuration.

   Request:

   {
       "requestType": "ReadWrite",
       "commands": [
           {
               "symbol": "TcHmiSrv.Config::USERGROUPUSERS::MinimalAuthentication",
               "commandOptions": [ "SendErrorMessage" ]
           }
       ]
   }

   Response:

   {
       "requestType": "ReadWrite",
       "commands": [
           {
               "symbol": "TcHmiSrv.Config::USERGROUPUSERS::MinimalAuthentication",
               "readValue": {
                   "admin": {
                       "USERGROUPUSERS_AUTO_LOGOFF": "P30D",
                       "USERGROUPUSERS_GROUPS": [
                           "__SystemAdministrators"
                       ],
                       "USERGROUPUSERS_LOCALE": "client"
                   }
               }
           }
       ]
   }

4. Get the name of the current default authentication extension.

   Request:

   {
       "requestType": "ReadWrite",
       "commands": [
           {
               "symbol": "TcHmiSrv.Config::DEFAULTAUTHEXTENSION",
               "commandOptions": [ "SendErrorMessage" ]
           }
       ]
   }

   Response:

   {
       "requestType": "ReadWrite",
       "commands": [
           {
               "symbol": "TcHmiSrv.Config::DEFAULTAUTHEXTENSION",
               "readValue": "TcHmiUserManagement",
           }
       ]
   }

5. Make "MinimalAuthentication" the default authentication extension.

   Request:

   {
       "requestType": "ReadWrite",
       "commands": [
           {
               "symbol": "TcHmiSrv.Config::DEFAULTAUTHEXTENSION",
               "writeValue": "MinimalAuthentication",
               "commandOptions": [ "SendErrorMessage", "SendWriteValue" ]
           }
       ]
   }

   Response:

   {
       "requestType": "ReadWrite",
       "commands": [
           {
               "symbol": "TcHmiSrv.Config::DEFAULTAUTHEXTENSION",
               "readValue": "MinimalAuthentication"
           }
       ]
   }