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Decrypt/lib/Filter/Crypto/Decrypt.pm  view on Meta::CPAN

may assist in retrieving the original unencrypted source code.

=item Can't run with Perl debugger

(F) The encrypted Perl file is being run by a perl with the Perl debugger
enabled, e.g. C<perl -d:ptkdb F<file>>.  This is not allowed since it may assist
in retrieving the original unencrypted source code.

=item Can't start decryption: %s

(F) The cipher context structure used to perform the source code decryption
could not be initialized so the decryption could not be started.  The last error
message from the decryption code is also given.

=item Found wrong MAGIC in decryption filter's SV: No valid mg_ptr

(F) The MAGIC found in the SV used by the source code decryption filter to
maintain state was not the correct MAGIC since it did not contain a valid
C<mg_ptr> member.

=item Found wrong MAGIC in decryption filter's SV: Wrong mg_ptr "signature"

(F) The MAGIC found in the SV used by the source code decryption filter to
maintain state was not the correct MAGIC since it did not contain the correct
"signature" in its C<mg_ptr> member.

=item No such package '%s'

(F) This module's bootstrap function was called on the specified package, which
does not exist.

=item Unknown crypto context mode '%d'

(I) The crypto context structure used internally when performing decryption has
been set-up with a crypt mode that it does not recognize.

=back

=head1 EXPORTS

I<None>.

=head1 KNOWN BUGS

=over

=item C<__DATA__> is not accessible when running encrypted files.

See L<https://rt.cpan.org/Ticket/Display.html?id=54370>.

=item Infinite loop when running a program using an encrypted Data::Alias.

See L<https://rt.cpan.org/Ticket/Display.html?id=122951>.

=back

=head1 SEE ALSO

L<Filter::Crypto>;

L<Filter::CBC>, L<Crypt::License>.

The latter two modules (in separate CPAN distributions, not related to the
Filter-Crypto distribution in any way) are both Perl-level source code filters
and are thus even less secure than this module is.  (This module's filter code
is written in XS and C.)

=head1 ACKNOWLEDGEMENTS

Much of the XS code is based on that in the Filter::decrypt module (version
1.49), written by Paul Marquess.

Thanks to Nick Ing-Simmons for help in getting the MAGIC attached to the
decryption filter's SV working.

=head1 AUTHOR

Steve Hay E<lt>L<shay@cpan.org|mailto:shay@cpan.org>E<gt>.

=head1 COPYRIGHT

Copyright (C) 2004-2009, 2012-2014 Steve Hay.  All rights reserved.

=head1 LICENCE

This module is free software; you can redistribute it and/or modify it under the
same terms as Perl itself, i.e. under the terms of either the GNU General Public
License or the Artistic License, as specified in the F<LICENCE> file.

=head1 VERSION

Version 2.10

=head1 DATE

02 Jul 2023

=head1 HISTORY

See the F<Changes> file.

=cut

#===============================================================================