public String getRadiusCAType() throws GuacamoleException {
        return environment.getProperty(
            RadiusGuacamoleProperties.RADIUS_CA_TYPE,
            "pem"
        );
    }
Returns the type of store that the CA file represents
so that it can be correctly processed by the RADIUS
library, as configured in guacamole.properties.  By
default the pem type is used.

@return
    The type of store that the CA file is encoded
    as, as configured in guacamole.properties.

@throws GuacamoleException
    If guacamole.properties cannot be parsed.
extensions/guacamole-auth-radius/src/main/java/org/apache/guacamole/auth/radius/conf/ConfigurationService.java