AuthorizeRequest.pm 8.19 KB
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# -*- indent-tabs-mode: nil; -*-
# vim:ft=perl:et:sw=4
# $Id$

# Sympa - SYsteme de Multi-Postage Automatique
#
# Copyright (c) 1997, 1998, 1999 Institut Pasteur & Christophe Wolfhugel
# Copyright (c) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
# 2006, 2007, 2008, 2009, 2010, 2011 Comite Reseau des Universites
# Copyright (c) 2011, 2012, 2013, 2014, 2015, 2016 GIP RENATER
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

package Sympa::Spindle::AuthorizeRequest;

use strict;
use warnings;
use Time::HiRes qw();

use Sympa;
use Sympa::CommandDef;
use Sympa::Log;
use Sympa::Request;
use Sympa::Scenario;
use Sympa::Spool::Request;

use base qw(Sympa::Spindle);

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my $log = Sympa::Log->instance;
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sub _twist {
    my $self    = shift;
    my $request = shift;

    # Skip authorization unless specific scenario is defined.
    if (   $request->{error}
        or not $Sympa::CommandDef::comms{$request->{action}}
        or not $Sympa::CommandDef::comms{$request->{action}}->{scenario}) {
        return ['Sympa::Spindle::DispatchRequest'];
    }

    my $scenario = $Sympa::CommandDef::comms{$request->{action}}->{scenario};
    my $action_regexp =
        $Sympa::CommandDef::comms{$request->{action}}->{action_regexp}
        or die 'bug in logic. Ask developer';

    my $message = $request->{message};
    my $sender  = $request->{sender};

    # Check if required list argument is known.
    if ($request->{localpart} and ref $request->{context} ne 'Sympa::List') {
        $request->{error} = 'unknown_list';
        return ['Sympa::Spindle::DispatchRequest'];
    }
    my $that = $request->{context};

    my $context = {
        sender  => $sender,
        message => $message,
    };

    # Authorize requests.

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    return 'wrong_auth'
        unless defined _get_auth_method($self, $request);

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    my $action;
    my $result;

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    my $auth_method =
          $request->{smime_signed} ? 'smime'
        : $request->{md5_check}    ? 'md5'
        : $request->{dkim_pass}    ? 'dkim'
        :                            'smtp';
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    $result = Sympa::Scenario::request_action($that, $scenario, $auth_method,
        $context);
    $action = $result->{'action'} if ref $result eq 'HASH';

    unless (defined $action and $action =~ /\A(?:$action_regexp)\b/) {
        $log->syslog(
            'info',
            '%s for %s from %s aborted, unknown requested action "%s" in scenario "%s"',
            uc $request->{action},
            $that,
            $sender,
            $action,
            $scenario
        );
        my $error = sprintf 'Unknown requested action in scenario: %s',
            ($action || '');
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        Sympa::send_notify_to_listmaster(
            $request->{context},
            'mail_intern_error',
            {   error  => $error,
                who    => $sender,
                action => 'Command process',
            }
        );
        $self->add_stash($request, 'intern');
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        return undef;
    }

    # Special cases for subscribe & signoff: If membership is unsatisfactory,
    # force execute request and let it be rejected.
    unless ($action =~ /\Areject\b/i) {
        if ($request->{action} eq 'subscribe'
            and defined $that->get_list_member($request->{email})) {
            $action =~ s/\A\w+/do_it/;
        } elsif ($request->{action} eq 'signoff'
            and not defined $that->get_list_member($request->{email})) {
            $action =~ s/\A\w+/do_it/;
        }
    }

    if ($action =~ /\Ado_it\b/i) {
        $request->{quiet} ||= ($action =~ /,\s*quiet\b/i);    # Overwrite.
        $request->{notify} = ($action =~ /,\s*notify\b/i);
        return ['Sympa::Spindle::DispatchRequest'];
    } elsif ($action =~ /\Arequest_auth\b(?:\s*[[]\s*(\S+)\s*[]])?/i) {
        my $to = $1;
        if ($to and $to eq 'email') {
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            $request->{sender_to_confirm} = $request->{email};
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        }
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        return ['Sympa::Spindle::ToAuth'];
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    } elsif ($action =~ /\Aowner\b/i and ref $that eq 'Sympa::List') {
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        $request->{quiet} ||= ($action =~ /,\s*quiet\b/i);
        return ['Sympa::Spindle::ToRequest'];
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    } elsif ($action =~ /\Areject\b/i) {
        if (defined $result->{'tt2'}) {
            unless (
                Sympa::send_file(
                    $that, $result->{'tt2'},
                    $sender, {'auto_submitted' => 'auto-replied'}
                )
                ) {
                $log->syslog('notice', 'Unable to send template "%s" to %s',
                    $result->{'tt2'}, $sender);
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                $self->add_stash($request, 'auth', $result->{'reason'});
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            }
        } else {
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            $self->add_stash($request, 'auth', $result->{'reason'});
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        }
        $log->syslog(
            'info',
            '%s for %s from %s refused (not allowed)',
            uc $request->{action},
            $that, $sender
        );
        return 'not_allowed';
    } else {
        #NOTREACHED
        die 'bug in logic. Ask developer';
    }
}

# Checks the authentication and return method
# used if authentication not failed.
# Returns 'smime', 'md5', 'dkim' or 'smtp' if authentication OK, undef else.
# Old name: Sympa::Commands::get_auth_method().
sub _get_auth_method {
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    my $self    = shift;
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    my $request = shift;

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    my $that   = $request->{context};
    my $sender = $request->{sender};
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    my $cmd   = $request->{action};
    my $email = $request->{email};

    my $auth = $request->{auth};

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    if ($request->{smime_signed}) {
        ;
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    } elsif ($auth) {
        $log->syslog('debug', 'Auth received from %s: %s', $sender, $auth);

        my $compute;
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        if (ref $that eq 'Sympa::List') {
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            $compute = Sympa::compute_auth(
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                context => $that,
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                email   => $email,
                action  => $cmd
            );
        } else {
            $compute = Sympa::compute_auth(
                context => '*',
                email   => $email,
                action  => $cmd
            );
        }
        if ($auth eq $compute) {
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            $request->{md5_check} = 1;
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        } else {
            $log->syslog('debug2', 'Auth should be %s', $compute);
            if (grep { $cmd eq $_ } qw(add del invite signoff subscribe)) {
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                $self->add_stash($request, 'user', 'wrong_email_confirm',
                    {command => $cmd});
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            } else {
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                Sympa::send_notify_to_listmaster(
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                    $that,
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                    'mail_intern_error',
                    {   error  => 'The authentication process failed',
                        who    => $sender,
                        action => 'Command process',
                    }
                );
                $self->add_stash($request, 'intern');
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            }
            $log->syslog('info', 'Command "%s" from %s refused, auth failed',
                $request->{cmd_line}, $sender);
            return undef;
        }
    }

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    return 1;
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}

1;
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__END__

=encoding utf-8

=head1 NAME

Sympa::Spindle::AuthorizeRequest -
Workflow to authorize requests in command messages

=head1 DESCRIPTION

L<Sympa::Spindle::AuthorizeRequest> authorizes requests and stores them
into request spool or dispatch them.

TBD

=head2 Public methods

See also L<Sympa::Spindle/"Public methods">.

=over

=item new ( key =E<gt> value, ... )

In most cases, L<Sympa::Spindle::ProcessMessage>
splices meessages to this class.  This method is not used in ordinal case.

=item spin ( )

Not implemented.

=back

=head1 SEE ALSO

L<Sympa::Request>, L<Sympa::Scenario>, L<Sympa::Spindle::DispatchRequest>,
L<Sympa::Spindle::ProcessMessage>, L<Sympa::Spindle::ProcessRequest>,
L<Sympa::Spindle::ToAuth>, L<Sympa::Spindle::ToRequest>.

=head1 HISTORY

L<Sympa::Spindle::AuthorizeRequest> appeared on Sympa 6.2.13.

=cut