wp_cassify_login_with_redirect
Shortcode is used to add link to CAS server login url with redirect parameter filled with service callback url.
Examples
You can use in template file like this :
<div><a href="<?php echo do_shortcode( '[wp_cassify_login_with_redirect service_redirect_url="' . wp_login_url() . '"]' ); ?>">CAS Authentication</a></div>
Or in a post like this :
<a href="[wp_cassify_login_with_redirect service_redirect_url="http://www.dev.lan/sandbox01/wp-login.php"]">CAS Authentication</a></div>
Output
This is the html output in my case :
https://cas.dev.lan/cas/login?service=http://www.dev.lan/sandbox01/wp-login.php