[keycloak-user] Adding an attribute "context" to org.keycloak.representations.idm.authorization.Permission

Hi, I'm quite new to keycloak and not sure if it is a keycloak-user or keycloak-dev question, please route to the right place if somebody knows. Is is about the authz part of Keycloak. Our security policy includes a concept of "context" for a permission scope. It is a String that should be evaluated by the resource owner application, it can be a time restriction, or a rule applying on a business bean (eg invoice.amount < 1000), or some other global situation (eg env.emergency == true). Current implementation uses a SpringEL expression to evaluate the permission context. It allows to modelize quite complex security policies using few rules. Somewhat in an ABAC way, but Keycloak is only responsible to distribute user permission with allowed resource and scope, resource owner is responsible to evaluate the context of the scope to allow the user to do an action. I have a Keycloak server plugin that adds a PolicyProviderFactory and PolicyProvider, and stores the context for the scopes. I have an extended keycloak-spring-security-adapter which can evaluate SpringEL contexts when SpringSecurity evaluates permissions. The problem is how the context string can be sent from my policy plugin to the keycloak authz client ? Without modifying too much Keycloak code, the Permission class is used many differents places, but currently i see no other way. Any ideas ? Thanks.