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Developer FAQs#

How to enable debug logs for jans-cli and TUI configuration tools#

By default, logging is not enabled for CLI or TUI tools on Janssen Server. Follow the steps below to enable and configure logging for CLI and TUI tools:

  • Log in as root user
  • open config file for editing ~/.config/jans-cli.ini
  • Update value for debug to true and add new entry for log_dir key with value pointing to directory where logs need to be generated. e.g
    debug = true
    log_dir = /opt/jans
  • Close currently open TUI session if any and open a new one
  • Logs should get available at location configured in log_dir in files cli_debug.log and dev-tui.log

How to get certificate from Let's encrypt#

Let's Encrypt is a CA that provides free CA certificates. You can use these certificates to enable HTTPS communication with Janssen Server. Refer to this guide from Let's Encrypt to know more. We have compiled a set of commands for different OS platforms to help you as a quick reference to generate Let's Encrypt CA certificates.


sudo zypper -n install certbot
sudo certbot certonly --webroot -w /srv/www/htdocs -d FQDN


sudo apt update && sudo apt install certbot python3-certbot-apache
sudo certbot --apache -d FQDN

To check certbot status

sudo systemctl status certbot.timer

To renew certificate run

sudo certbot renew --dry-run


sudo yum install certbot python3-certbot-apache
sudo certbot certonly --apache

How to install Janssen Server OpenBanking for testing?#


  • Use this installation for testing only
  • Good understanding of Janssen Server installation process in general is a prerequisite. Here we are just highlighting steps without a lot of details. Visit installation documentation for complete understanding.

This installation uses Gluu Testing certificate.

Download Installer#

wget -O

Execute Installer#

python3 --profile=openbanking --args="-ob-key-fn=/opt/jans/jans-setup/openbanking/static/ob-gluu-test.key -static-kid=ob-gluu-test -jwks-uri= --disable-ob-auth-script -ob-alias=ob-gluu-test"

Please enter defaults for the following questions (press just enter key), it will download certificate from jwksUri

Use external key? [Y|n] : y
  Openbanking Key File [/opt/jans/jans-setup/openbanking/static/ob-gluu-test.key] : 
  Openbanking Certificate File [/root/obsigning.pem] : 
  Openbanking Key Alias [ob-gluu-test] : 

Configure Certificate#

 /opt/jans/jans-cli/ -CC /opt/jans/jans-setup/output/CA/client.crt -CK /opt/jans/jans-setup/output/CA/client.key


This test uses Gluu Testing certificate.

device authentication#

After installation we have to complete device authentication to use openbanking.

Testing using IM mode#

launch jans-cli using below command

/opt/jans/jans-cli/ -CC /opt/jans/jans-setup/output/CA/client.crt -CK /opt/jans/jans-setup/output/CA/client.key
further testing is same as jans server

Testing using command line mode#

we can run below command at command line. for ex:

/opt/jans/jans-cli/ -CC /opt/jans/jans-setup/output/CA/client.crt -CK /opt/jans/jans-setup/output/CA/client.key –operation-id get-oauth-openid-clients

same way we can run other commands. rest is same for jans and openbanking

Last update: 2023-10-19
Created: 2022-05-18