Add API user and callback URL in Hermod

This article describes how to add a new API user in Hermod to get a unique API key for authentication to the API.

Prerequisites

• Installed Hermod, see Deploy Smart ID.

Step-by-step instruction

Edit configuration file for Hermod docker image

To configure Hermod, do the following:

1. Open Hermod Config file. 

2. Navigate to the top-level directory where docker-compose.yml is located. The configuration file should then be found in a config/ directory.

   Example: File structure

   CODE

   mydir/ 
   |-- cacerts 
   |-- certificates 
   |-- config 
   | 
   |-- application.yml -> cod-hermod.yml 
   | `-- cod-hermod.yml 
   `-- docker-compose.yml

3. Open the configuration file for editing.

   Example: Command to edit configuration file

   TEXT

   vi config/cod-hermod.yml

Application.yml is a link to cod-hermod.yml. 
Application.yml is the actual file used by the server. 

Edit configuration file for Hermod WAR file

1. Navigate to and open for editing application.yml.
   Default file path: /wbapps/hermod/WEB-INF/classes/application.yml 

2. Open a browser and go to the following URL, using a unique <myclientid>:

   Example: Generate client URL

   TEXT

   http://localhost:20400/<contextPath>/<uriBase>/util/generateclient/<myclientid>
   
   The default value for /<contextPath>/<uriBase> is /hermod/rest

   
   Find port number

   All requests below are triggered from the host itself, thus localhost is used.

   The port number (20400 in the example above) might have been assigned a different value. To find out the current port number, do the following:
   For docker:
   Type the command

   CODE

   docker ps | grep hermod_hermod

   For tomcat:
   Check server.xml

3. Copy the content from the resulting web page and paste it into the allowed-clients section of the configuration file. 

The username and password must match the username and password for the dedicated user that has been added in Identity Manager, see Integrate Identity Manager with Smart ID Messaging.

Example: Generate client

# X-Api-Key: a2Fyb2xpbjpmZDA0ZGUyZjFlNTU0NGIyOTE1ZDFhNjUwOThjNDkwNjM3YTA3MTVmNWM5ODQzNDU5ZjA1ZGZjMjk4MzQyOTM2 
- client-id: <myclientid> 
    key: fd04de2f1e5544b2915d1a65098c490637a0715f5c9843459f05dfc298342936
    # Optional username:password to be supplied for basic authentication in callbacks
    callback-basic-auth: username:password
    # The callback URL base for this specific client
    callback-url: http://localhost:20400/hermod/rest

X-API-Key, which is the base64-encoded value of client-id:key, is the key you need to configure in clients, such as Smart ID Identity Manager. 

Do not add any extra spaces in the configuration file, the .yml file format is space sensitive.

4. Edit callback-url to receive the callbacks from the Hermod API.
   Also edit username and password if the callback URL requires basic authentication.

5. Optional - If visual data is to be fetched from an external content provider:

   1. Configure content-provider-url to point to the Content provider API.

   2. Also edit user and pwd if the content provider requires basic authentication.

      CODE

          # Optional: username and password to be supplied for basic authentication to the content provider
          content-provider-basic-auth: user:pwd
          # Optional: The URL to the content provider API
          # When Identity Manager is used as content provider, the URL will look like this: https://<IDM-OPERATOR>/ws/hermod/contentprovider/getcontent
          content-provider-url: https://myprovider/getcontent

6. Save and exit the configuration file.

Refresh configuration and test API key

1. Refresh the configuration:

   Example: Refresh configuration

   TEXT

   curl -X POST http://localhost:20400/<contextPath>/refresh

2. Test the new key by sending a request using curl (set THE-NEW-KEY below):
   
   Example: Test API key

   CODE

   curl -w%{http_code} -X POST \
     http://localhost:20400/<contextPath>/<uriBase>/command/ping \
     -H 'cache-control: no-cache' \
     -H 'content-type: application/json' \
     -H 'x-api-key: THE-NEW-KEY' \
     -d '{
     "commandHeader" : {
       "to": ["api-test"]
     }
   }'

3. Check the response.

   • If you get a 403 response, you have the wrong API key.

   • If you get a 404 response, then you have the correct API key. A 404 response means that the user api-test isn't found, which is expected at this point.