File::KDBX::Key::ChallengeResponse - A challenge-response key

       Charles McGarvey <ccm@cpan.org>

       Please report any bugs or feature requests on the bugtracker website
       <https://github.com/chazmcgarvey/File-KDBX/issues>

       When submitting a bug or request, please include a test-file or a patch to an existing test-file that
       illustrates the bug or desired feature.

       This software is copyright (c) 2022 by Charles McGarvey.

       This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5
       programming language system itself.

perl v5.40.1                                       2025-05-04             File::KDBX::Key...allengeResponse(3pm)

       A challenge-response key is kind of like multifactor authentication, except you don't really authenticate
       to a KDBX database because it's not a service. Specifically it would be the "what you have" component. It
       assumes there is some device that can store a key that is only known to the owner of a database. A
       challenge is made to the device and the response generated based on the key is used as the raw key.

       Inherets methods and attributes from File::KDBX::Key.

       This is a generic implementation where a responder subroutine is provided to provide the response. There
       is also File::KDBX::Key::YubiKey which is a subclass that allows YubiKeys to be responder devices.

raw_key
           $raw_key = $key->raw_key;
           $raw_key = $key->raw_key($challenge);

       Get the raw key which is the response to a challenge. The response will be saved so that subsequent calls
       (with or without the challenge) can provide the response without challenging the responder again. Only
       one response is saved at a time; if you call this with a different challenge, the new response is saved
       over any previous response.

   challenge
           $response = $key->challenge($challenge, @options);

       Issue a challenge and get a response, or throw if the responder failed to provide one.

       File::KDBX::Key::ChallengeResponse - A challenge-response key

           use File::KDBX::Key::ChallengeResponse;

           my $responder = sub {
               my $challenge = shift;
               ...;    # generate a response based on a secret of some sort
               return $response;
           };
           my $key = File::KDBX::Key::ChallengeResponse->new($responder);

       version 0.906