# Build log hardening check, checks build logs for missing hardening flags.
-# Copyright (C) 2012-2013 Simon Ruderich
+# Copyright (C) 2012-2015 Simon Ruderich
#
# 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
use Getopt::Long ();
use Text::ParseWords ();
-our $VERSION = '0.04';
+our $VERSION = '0.05';
# CONSTANTS/VARIABLES
/x;
# Full regex which matches the complete compiler name. Used in a few places to
# prevent false negatives.
+my $cc_regex_full_prefix = qr/
+ [a-z0-9_]+-(?:linux-|kfreebsd-)?gnu(?:eabi|eabihf)?
+ /x;
my $cc_regex_full = qr/
- (?:[a-z0-9_]+-(?:linux-|kfreebsd-)?gnu(?:eabi|eabihf)?-)?
+ (?:$cc_regex_full_prefix-)?
$cc_regex
/x;
# Regex to check if a line contains a compiler command.
# Regex to catch libtool commands and not lines which show commands executed
# by libtool (e.g. libtool: link: ...).
my $libtool_regex = qr/\blibtool\s.*--mode=/;
+my $libtool_link_regex = qr/\blibtool: link: /;
# List of source file extensions which require preprocessing.
my @source_preprocess_compile_cpp = (
}
if ($option_version) {
print <<"EOF";
-blhc $VERSION Copyright (C) 2012-2013 Simon Ruderich
+blhc $VERSION Copyright (C) 2012-2015 Simon Ruderich
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
my $harden_pie = $option_pie; # defaults to 0
# Does this build log use ada? Ada also uses gcc as compiler but uses
- # different CFLAGS. But only perform ada checks if an ada compiler used
+ # different CFLAGS. But only perform ada checks if an ada compiler is used
# for performance reasons.
my $ada = 0;
next if not $before =~ /$cc_regex_normal/o
and not $after =~ /$cc_regex_normal/o;
}
+ # Ignore false positives caused by gcc -v. It outputs a line
+ # looking like a normal compiler line but which is sometimes
+ # missing hardening flags, although the normal compiler line
+ # contains them.
+ next if $line =~ m{^\s+/usr/lib/gcc/$cc_regex_full_prefix/
+ [0-9.]+/cc1(?:plus)?}xo;
+ # Ignore false positive with `rm` which may remove files which
+ # look like a compiler executable thus causing the line to be
+ # treated as a normal compiler line.
+ next if $line =~ m{^\s*rm\s+};
# Check if additional hardening options were used. Used to ensure
# they are used for the complete build.
# Option or auto detected.
if ($arch) {
- # The following was partially copied from dpkg-dev 1.17.11
+ # The following was partially copied from dpkg-dev 1.18.2
# (/usr/share/perl5/Dpkg/Vendor/Debian.pm, add_hardening_flags()),
# copyright Raphaƫl Hertzog <hertzog@debian.org>, Kees Cook
# <kees@debian.org>, Canonical, Ltd. licensed under GPL version 2 or
my ($abi, $os, $cpu) = Dpkg::Arch::debarch_to_debtriplet($arch);
# Disable unsupported hardening options.
- if ($os !~ /^(?:linux|knetbsd|hurd)$/ or
- $cpu =~ /^(?:hppa|mips|mipsel|avr32)$/) {
+ if ($os !~ /^(?:linux|knetbsd|hurd)$/ or $cpu =~ /^(?:hppa|avr32)$/) {
$harden_pie = 0;
}
- if ($cpu =~ /^(?:ia64|alpha|mips|mipsel|hppa)$/ or $arch eq 'arm') {
+ if ($cpu =~ /^(?:ia64|alpha|hppa)$/ or $arch eq 'arm') {
$harden_stack = 0;
$harden_stack_strong = 0;
}
- if ($arch =~ /^(?:m68k|or1k|powerpcspe|sh4|x32)$/) {
- $harden_stack_strong = 0;
- }
if ($cpu =~ /^(?:ia64|hppa|avr32)$/) {
$harden_relro = 0;
$harden_bindnow = 0;
# is_non_verbose_build()).
next if $skip;
+ my $orig_line = $line;
+
# Remove everything until and including the compiler command. Makes
# checks easier and faster.
$line =~ s/^.*?$cc_regex//o;
}
# These file types require preprocessing.
if (extension_found(\%extensions_preprocess, @extensions)) {
- $preprocess = 1;
+ # Prevent false positives with "libtool: link: g++ -include test.h
+ # .." compiler lines.
+ if ($orig_line !~ /$libtool_link_regex/o) {
+ $preprocess = 1;
+ }
}
if (not $flag_preprocess) {
=head1 LICENSE AND COPYRIGHT
-Copyright (C) 2012-2013 by Simon Ruderich
+Copyright (C) 2012-2015 by Simon Ruderich
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