NAME

    FTN::Crypt - Encryption of the FTN messages.

 VERSION

    0.5.1

SYNOPSIS

        use FTN::Crypt;

        my $obj = FTN::Crypt->new(
            Nodelist => 'NODELIST.*',
            Pointlist => [
                'pointlist_1.*',
                'pointlist_2',
            ],
        ) or die FTN::Crypt->error;

        $obj->encrypt_message(
            Address => $ftn_address,
            Message => $msg,
        ) or die $obj->error;

DESCRIPTION

    The possibility of FTN netmail encryption may be sometimes a useful
    option. Corresponding nodelist flag was proposed in FSC-0073.

    Although current FidoNet Policy (version 4.07 dated June 9, 1989)
    clearly forbids routing of encrypted traffic without the express
    permission of all the links in the delivery system, it's still possible
    to deliver such messages directly. And, obviously, such routing may be
    allowed in FTN networks other than FidoNet.

    The proposed nodelist userflag is ENCRYPT:[TYPE], where [TYPE] is one
    of 'PGP2', 'PGP5', 'GnuPG'. So encryption-capable node should have
    something like U,ENCRYPT:PGP5 in his nodelist record.

METHODS

 new()

    Constructor.

  Parameters:

      * Nodelist: Path to nodelist file(s), either scalar or arrayref. If
      contains wildcard, file with maximum number in digital extension will
      be selected.

      * Optional Pointlist: Path to pointlist file(s), either scalar or
      arrayref. If contains wildcard, file with maximum number in digital
      extension will be selected.

      * Optional Keyserver Keyserver (defaults to
      'https://zimmermann.mayfirst.org/pks/lookup').

      * Optional Pubring Public keyring file.

      * Optional Secring Secret keyring file.

  Returns:

    Created object or error in FTN::Crypt->error.

    Sample:

        my $obj = FTN::Crypt->new(
            Nodelist => 'NODELIST.*',
            Pointlist => [
                'pointlist_1.*',
                'pointlist_2',
            ],
        ) or die FTN::Crypt->error;

 encrypt_message()

    Message encryption.

  Parameters:

      * Address: Recipient's FTN address.

      * Message: FTN message text with kludges.

  Returns:

    Encrypted message or error in $obj->error.

    Sample:

        my $res = $obj->encrypt_message(
            Address => $ftn_address,
            Message => $msg,
        ) or die $obj->error;

 decrypt_message()

    Message decryption.

  Parameters:

      * Address: Recipient's FTN address.

      * Message: FTN message text with kludges.

      * Passphrase: Key passphrase.

  Returns:

    Decrypted message or error in $obj->error.

    Sample:

        my $res = $obj->decrypt_message(
            Address => $ftn_address,
            Message => $msg,
            Passphrase => $pass,
        ) or die $obj->error;

AUTHOR

    Petr Antonov, <pietro@cpan.org>

COPYRIGHT AND LICENSE

    Copyright (C) 2019 by Petr Antonov

    This library is free software; you can redistribute it and/or modify it
    under the same terms as Perl 5.10.0. For more details, see the full
    text of the licenses at https://opensource.org/licenses/Artistic-1.0,
    and http://www.gnu.org/licenses/gpl-2.0.html.

    This package is provided "as is" and without any express or implied
    warranties, including, without limitation, the implied warranties of
    merchantability and fitness for a particular purpose.

INSTALLATION

    Using cpan:

        $ cpan FTN::Crypt

    Manual install:

        $ perl Makefile.PL
        $ make
        $ make test
        $ make install

REFERENCES

    1 FidoNet Policy Document Version 4.07
    <https://www.fidonet.org/policy4.txt>

    2 FTS-5001 - Nodelist flags and userflags
    <http://ftsc.org/docs/fts-5001.006>

    3 FSC-0073 - Encrypted message identification for FidoNet *Draft I*
    <http://ftsc.org/docs/fsc-0073.001>