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.\" ========================================================================
.\"
.IX Title "File::KDBX::Key::ChallengeResponse 3pm"
.TH File::KDBX::Key::ChallengeResponse 3pm "2022-11-20" "perl v5.36.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
File::KDBX::Key::ChallengeResponse \- A challenge\-response key
.SH "VERSION"
.IX Header "VERSION"
version 0.906
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&    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);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
A challenge-response key is kind of like multifactor authentication, except you don't really \fIauthenticate\fR
to a \s-1KDBX\s0 database because it's not a service. Specifically it would be the \*(L"what you have\*(R" 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.
.PP
Inherets methods and attributes from File::KDBX::Key.
.PP
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.
.SH "METHODS"
.IX Header "METHODS"
.SS "raw_key"
.IX Subsection "raw_key"
.Vb 2
\&    $raw_key = $key\->raw_key;
\&    $raw_key = $key\->raw_key($challenge);
.Ve
.PP
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.
.SS "challenge"
.IX Subsection "challenge"
.Vb 1
\&    $response = $key\->challenge($challenge, @options);
.Ve
.PP
Issue a challenge and get a response, or throw if the responder failed to provide one.
.SH "BUGS"
.IX Header "BUGS"
Please report any bugs or feature requests on the bugtracker website
<https://github.com/chazmcgarvey/File\-KDBX/issues>
.PP
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.
.SH "AUTHOR"
.IX Header "AUTHOR"
Charles McGarvey <ccm@cpan.org>
.SH "COPYRIGHT AND LICENSE"
.IX Header "COPYRIGHT AND LICENSE"
This software is copyright (c) 2022 by Charles McGarvey.
.PP
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.