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|
use strict;
use File::Copy;
# base directory where dump_info() will put its stuff
my $dump_info_tempdir = '/tmp';
# dump_info creates a .info file for every processed attachment that contains
# internal meta information determined by amavis. It can be used by
# av_scanners. E.g. for behavioural analysis checking in sandboxes where the
# original file extension is required.
#
# example: p002.info
#
# [attachment]
# full_name: : /var/lib/amavis/tmp/amavis-20170427T174709-03863-dIJwSsyE/parts/p002
# name_declared: : hugo.txt
# type_declared: : text/plain
# type_long: : ASCII text
# type_short: : asc
# size: : 14
# digest: : fecf3151ca5ce7b9d24defdc140edc0eefaaeaed:text/plain
# attributes: :
# queue_id: : 96C866A02E4
sub dump_info($$$) {
my ($part, $tempdir, $own_tempdir) = @_;
my $full_name = $part->full_name;
my $base_name = $part->base_name;
my $dir_name = $part->dir_name;
# redirect amavis tempdir into our tempdir but keep intermediate path
# components ->/var/lib/amavis/tmp/amavis-20180822T155830-07760-4DfB2yxI/parts ->
# /tmp/amavis-20180822T155830-07760-4DfB2yxI/parts
$dir_name =~ s|^$tempdir/|$own_tempdir/|;
# remove /parts subdir component from end
$dir_name =~ s|/parts$||;
unless (-d $dir_name || mkdir($dir_name, 0770)) {
Amavis::Util::do_log(-1, "WARN: Couldn't create info dir $dir_name: $!");
return 0;
}
my $info_file = "$dir_name/$base_name.info";
my $info_fh;
unless (open($info_fh, ">:encoding(UTF-8)", $info_file)) {
Amavis::Util::do_log(-1, "WARN: Couldn't create info file $info_file: $!");
return 0;
}
printf $info_fh "[attachment]\n";
for my $field (qw(
full_name
name_declared
type_declared
type_long
type_short
size
digest
attributes
queue_id
)) {
my $val = $part->can($field) ? $part->$field() : $Amavis::MSGINFO->$field();
$val = ref $val eq 'ARRAY' ? $val->[-1] : $val;
$val = Amavis::Util::safe_decode_mime($val) if $field eq "name_declared";
printf $info_fh "%-15s: %s\n", "$field", $val;
}
close $info_fh;
unless (copy($full_name, $dir_name)) {
Amavis::Util::do_log(-1, "WARN: couldn't copy $full_name to $dir_name");
return 0;
}
return 1;
}
sub ask_peekaboo {
my($bare_fnames, $names_to_parts, $tempdir, $dummy) = @_;
# default to /tmp but let dump_info_tempdir override
my $own_tempdir = '/tmp';
$own_tempdir = $dump_info_tempdir if defined $dump_info_tempdir;
# remove everything after and including last slash (job identifier in e.g.
# /var/lib/amavis/tmp/amavis-20180822T155830-07760-4DfB2yxI) to get amavis
# tempdir
$tempdir =~ s|/+[^/]+$||;
# dump out some additional info for peekaboo
foreach my $part (values %{$names_to_parts}) {
unless (dump_info($part, $tempdir, $own_tempdir)) {
# signal virus scanning failure if info can't be dumped
return (undef, '', undef);
}
}
# use standard daemon socket communication to trigger peekaboo
ask_daemon(@_);
}
1; # ensure a defined return value
|
