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package Lemonldap::NG::Handler::Main::Jail;
use strict;
use Safe;
use Lemonldap::NG::Common::Safelib; #link protected safe Safe object
use constant SAFEWRAP => ( Safe->can("wrap_code_ref") ? 1 : 0 );
use Moose;
use Lemonldap::NG::Handler::Main::Logger;
has customFunctions => ( is => 'rw', isa => 'Maybe[Str]' );
has useSafeJail => ( is => 'rw', isa => 'Maybe[Int]' );
has jail => ( is => 'rw' );
has error => ( is => 'rw' );
our $VERSION = '1.9.1';
use Lemonldap::NG::Handler::Main '$datas', '$tsv';
use Lemonldap::NG::Handler::API ':functions';
## @imethod protected build_jail()
# Build and return the security jail used to compile rules and headers.
# @return Safe object
sub build_jail {
my $self = shift;
return $self->jail
if ( $self->jail
&& $self->jail->useSafeJail == $self->useSafeJail
&& $self->jail->customFunctions == $self->customFunctions );
$self->useSafeJail(1) unless defined $self->useSafeJail;
my @t =
$self->customFunctions ? split( /\s+/, $self->customFunctions ) : ();
foreach (@t) {
Lemonldap::NG::Handler::Main::Logger->lmLog( "Custom function : $_",
'debug' );
my $sub = $_;
unless (/::/) {
$sub = "$self\::$_";
}
else {
s/^.*:://;
}
next if ( $self->can($_) );
eval "sub $_ {
my \$uri = Lemonldap::NG::Handler::API::${Lemonldap::NG::Handler::API::mode}::uri_with_args();
return $sub(\$uri,\@_)
}";
Lemonldap::NG::Handler::Main::Logger->lmLog( $@, 'error' ) if ($@);
$_ = "&$_";
}
if ( $self->useSafeJail ) {
$self->jail( Safe->new );
$self->jail->share_from( 'main', ['%ENV'] );
}
else {
$self->jail($self);
}
# Share objects with Safe jail
$self->jail->share_from( 'Lemonldap::NG::Common::Safelib',
$Lemonldap::NG::Common::Safelib::functions );
$self->jail->share_from( 'Lemonldap::NG::Handler::Main',
[ '$tsv', '$datas' ] );
$self->jail->share_from(
'Lemonldap::NG::Handler::API',
[
qw( &hostname &remote_ip &uri &uri_with_args
&unparsed_uri &args &method &header_in )
]
);
$self->jail->share_from( __PACKAGE__, [ @t, '&encrypt' ] );
$self->jail->share_from( 'MIME::Base64', ['&encode_base64'] );
return $self->jail;
}
# Import crypto methods for jail
sub encrypt {
return $tsv->{cipher}->encrypt(@_);
}
## @method reval
# Fake reval method if useSafeJail is off
sub reval {
my ( $self, $e ) = @_;
my $res = eval $e;
if ($@) {
$self->error($@);
return undef;
}
return $res;
}
## @method wrap_code_ref
# Fake wrap_code_ref method if useSafeJail is off
sub wrap_code_ref {
my ( $self, $e ) = @_;
return $e;
}
## @method share
# Fake share method if useSafeJail is off
sub share {
my ( $self, @vars ) = @_;
$self->share_from( scalar(caller), \@vars );
}
## @method share_from
# Fake share_from method if useSafeJail is off
sub share_from {
my ( $self, $pkg, $vars ) = @_;
no strict 'refs';
foreach my $arg (@$vars) {
my ( $var, $type );
$type = $1 if ( $var = $arg ) =~ s/^(\W)//;
for ( 1 .. 2 ) { # assign twice to avoid any 'used once' warnings
*{$var} =
( !$type ) ? \&{ $pkg . "::$var" }
: ( $type eq '&' ) ? \&{ $pkg . "::$var" }
: ( $type eq '$' ) ? \${ $pkg . "::$var" }
: ( $type eq '@' ) ? \@{ $pkg . "::$var" }
: ( $type eq '%' ) ? \%{ $pkg . "::$var" }
: ( $type eq '*' ) ? *{ $pkg . "::$var" }
: undef;
}
}
}
## @imethod protected jail_reval()
# Build and return restricted eval command with SAFEWRAP, if activated
# @return evaluation of $reval or $reval2
sub jail_reval {
my ( $self, $reval ) = @_;
# if nothing is returned by reval, add the return statement to
# the "no safe wrap" reval
my $nosw_reval = $reval;
if ( $reval !~ /^sub\{return\(.*\}$/ ) {
$nosw_reval =~ s/^sub\{(.*)\}$/sub{return($1)}/;
}
my $res;
eval {
$res = (
SAFEWRAP
? $self->jail->wrap_code_ref( $self->jail->reval($reval) )
: $self->jail->reval($nosw_reval)
);
};
if ($@) {
$self->error($@);
return undef;
}
return $res;
}
1;
|
