143 lines
3.9 KiB
Perl
143 lines
3.9 KiB
Perl
#!perl -w
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=head1 NAME
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uvscan
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=head1 DESCRIPTION
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A qpsmtpd plugin for the McAfee commandline virus scanner, uvscan.
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=head1 INSTALL AND CONFIG
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Place this plugin in the plugin/virus directory beneath the standard
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qpsmtpd installation. If you installed uvscan with the default path, you
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can use this plugin with default options (nothing specified):
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=over 4
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=item B<uvscan_location>
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Full path to the uvscan binary and all signature files; defaults to
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/usr/local/bin/uvscan.
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=item B<deny_viruses>
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Whether the scanner will automatically delete messages which have viruses.
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Takes either 'yes' or 'no' (defaults to 'yes').
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=back
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=head1 AUTHOR
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John Peacock <jpeacock@cpan.org>
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=head1 COPYRIGHT AND LICENSE
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Copyright (c) 2004 John Peacock
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Based heavily on the clamav plugin
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This plugin is licensed under the same terms as the qpsmtpd package itself.
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Please see the LICENSE file included with qpsmtpd for details.
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=cut
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sub register {
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my ($self, $qp, @args) = @_;
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while (@args) {
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$self->{"_uvscan"}->{pop @args} = pop @args;
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}
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$self->{"_uvscan"}->{"uvscan_location"} ||= "/usr/local/bin/uvscan";
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}
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sub hook_data_post {
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my ($self, $transaction) = @_;
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return DECLINED
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if $transaction->data_size > 250_000;
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# Ignore non-multipart emails
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my $content_type = $transaction->header->get('Content-Type');
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$content_type =~ s/\s/ /g if defined $content_type;
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unless ( $content_type
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&& $content_type =~ m!\bmultipart/.*\bboundary="?([^"]+)!i)
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{
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$self->log(LOGWARN, "non-multipart mail - skipping");
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return DECLINED;
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}
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my $filename = $transaction->body_filename;
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return DECLINED if !$filename;
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# Now do the actual scanning!
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my @cmd = (
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$self->{"_uvscan"}->{"uvscan_location"},
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'--mime', '--unzip', '--secure', '--noboot', $filename, '2>&1 |'
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);
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$self->log(LOGINFO, "Running: ", join(' ', @cmd));
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open(FILE, join(' ', @cmd)); #perl 5.6 doesn't properly support the pipe
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# mode list form of open, but this is basically the same thing. This form
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# of exec is safe(ish).
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my $output;
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while (<FILE>) { $output .= $_; }
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close FILE;
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my $result = ($? >> 8);
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my $signal = ($? & 127);
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my $virus;
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if ($output && $output =~ m/.*\W+Found (.*)\n/m) {
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$virus = $1;
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}
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if ($output && $output =~ m/password-protected/m) {
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return DENY, 'We do not accept password-protected zip files!';
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}
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if ($signal) {
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$self->log(LOGWARN, "uvscan exited with signal: $signal");
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return DECLINED;
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}
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if ($result == 2) {
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$self->log(LOGERROR, "Integrity check for a DAT file failed.");
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return DECLINED;
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}
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elsif ($result == 6) {
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$self->log(LOGERROR, "A general problem has occurred.");
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return DECLINED;
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}
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elsif ($result == 8) {
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$self->log(LOGERROR, "The program could not find a DAT file.");
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return DECLINED;
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}
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elsif ($result == 15) {
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$self->log(LOGERROR, "The program self-check failed");
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return DECLINED;
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}
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elsif ($result) { # all of the possible virus returns
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if ($result == 12) {
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$self->log(LOGERROR,
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"The program tried to clean a file but failed.");
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}
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elsif ($result == 13) {
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$self->log(LOGERROR, "One or more virus(es) found");
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}
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elsif ($result == 19) {
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$self->log(LOGERROR, "Successfully cleaned the file");
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}
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if (lc($self->{"_uvscan"}->{"deny_viruses"}) eq "yes") {
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return DENY, "Virus Found: $virus";
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}
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$transaction->header->add('X-Virus-Found', 'Yes');
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$transaction->header->add('X-Virus-Details', $virus);
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return DECLINED;
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}
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$transaction->header->add('X-Virus-Checked',
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"Checked by McAfee uvscan on " . $self->qp->config("me"));
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return DECLINED;
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}
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