In CAS 6.4, we used the Duo Security provider for two-factor 
authentication. This provider communicated with our own MFA solution. That 
worked great! When CAS was upgraded to version 6.6, it stopped working 
because the duo_client_java library, from version 0.5.0 (including), they 
introduced certificate pinning. Unfortunately, I don't have the option to 
use a certificate from those CAs.

I used cas-overlay gradle.  

Is there any possibility to set a custom certificate using the 
configuration file? Alternatively, how to replace duo-client-*.jar with a 
custom version of the duo-client-java library where certificate pinning is 
disabled?

I'm trying in build.gradle to add *exclude(group: "com.duosecurity", 
module: "duo-client")* and in dependencies to add *implementation 
files('customlibs/duo-client-0.5.0.jar')*. If I tried  built the library 
using the jitpack repo, still not working. I also tried on 
springboot.gradle file add *exclude WEB-INF/lib/duo-client-*.jar*, also 
without success. In war still not contain custom version of library.

Is there any way to do this?

Thanks

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