# Regex to catch (GCC) compiler warnings.
my $warning_regex = qr/^(.+?):([0-9]+):[0-9]+: warning: (.+?) \[(.+?)\]$/;
-# Regex for source files which require preprocessing.
-my $source_preprocess_compile_regex = qr/
- # C
- c
- # Objective-C
- | m
+# List of source file extensions which require preprocessing.
+my @source_preprocess_compile_cpp = (
# C++
- | cc | cp | cxx | cpp | CPP | c\+\+ | C
+ qw( cc cp cxx cpp CPP c++ C ),
# Objective-C++
- | mm | M
+ qw( mm Mr),
+);
+my @source_preprocess_compile = (
+ # C
+ qw( c ),
+ # Objective-C
+ qw( m ),
+ # (Objective-)C++
+ @source_preprocess_compile_cpp,
# Fortran
- | F | FOR | fpp | FPP | FTN | F90 | F95 | F03 | F08
- /x;
-my $source_preprocess_no_compile_regex = qr/
+ qw( F FOR fpp FPP FTN F90 F95 F03 F08 ),
+);
+my @source_preprocess_no_compile = (
# Assembly
- s
- /x;
-my $source_preprocess_regex = qr/
- $source_preprocess_compile_regex
- | $source_preprocess_no_compile_regex
- /x;
-# Regex for source files which don't require preprocessing.
-my $source_no_preprocess_compile_regex = qr/
- # C
- i
+ qw( s ),
+);
+my @source_preprocess = (
+ @source_preprocess_compile,
+ @source_preprocess_no_compile,
+);
+# List of source file extensions which don't require preprocessing.
+my @source_no_preprocess_compile_cpp = (
# C++
- | ii
- # Objective-C
- | mi
+ qw( ii ),
# Objective-C++
- | mii
+ qw( mii ),
+);
+my @source_no_preprocess_compile = (
+ # C
+ qw( i ),
+ # (Objective-)C++
+ @source_no_preprocess_compile_cpp,
+ # Objective-C
+ qw( mi ),
# Fortran
- | f | for | ftn | f90 | f95 | f03 | f08
- /x;
-my $source_no_preprocess_no_compile_regex = qr/
+ qw( f for ftn f90 f95 f03 f08 ),
+);
+my @source_no_preprocess_no_compile = (
# Assembly
- S | sx
- /x;
-my $source_no_preprocess_regex = qr/
- $source_no_preprocess_compile_regex
- | $source_no_preprocess_no_compile_regex
- /x;
-# Regex for header files which require preprocessing.
-my $header_preprocess_regex = qr/
+ qw( S sx ),
+);
+my @source_no_preprocess = (
+ @source_no_preprocess_compile,
+ @source_no_preprocess_no_compile,
+);
+# List of header file extensions which require preprocessing.
+my @header_preprocess = (
# C, C++, Objective-C, Objective-C++
- h
+ qw( h ),
# C++
- | hh | H | hp | hxx | hpp | HPP | h\+\+ | tcc
- /x;
-# Regexps to match files with the given characteristics.
-my $file_no_preprocess_regex = qr/
- $cc_regex.+?
- \.(?: $source_no_preprocess_regex)\b
- /x;
-my $file_preprocess_regex = qr/
- $cc_regex.+?
- \.(?: $header_preprocess_regex
- | $source_preprocess_regex)\b
- /x;
-my $file_compile_link_regex = qr/
- $cc_regex.+?
- \.(?: $source_preprocess_regex
- | $source_no_preprocess_regex)\b
- /x;
-my $file_compile_regex = qr/
- $cc_regex.+?
- \.(?: $source_preprocess_compile_regex
- | $source_no_preprocess_compile_regex)\b
- /x;
-my $file_no_compile_regex = qr/
- $cc_regex.+
- \.(?: $source_preprocess_no_compile_regex
- | $source_no_preprocess_no_compile_regex)\b
+ qw( hh H hp hxx hpp HPP h++ tcc ),
+);
+
+# Hashes for fast extensions lookup to check if a file falls in one of these
+# categories.
+my %extensions_no_preprocess = map { $_ => 1 } (
+ @source_no_preprocess,
+);
+my %extensions_preprocess = map { $_ => 1 } (
+ @header_preprocess,
+ @source_preprocess,
+);
+my %extensions_compile_link = map { $_ => 1 } (
+ @source_preprocess,
+ @source_no_preprocess,
+);
+my %extensions_compile = map { $_ => 1 } (
+ @source_preprocess_compile,
+ @source_no_preprocess_compile,
+);
+my %extensions_no_compile = map { $_ => 1 } (
+ @source_preprocess_no_compile,
+ @source_no_preprocess_no_compile,
+);
+my %extensions_compile_cpp = map { $_ => 1 } (
+ @source_preprocess_compile_cpp,
+ @source_no_preprocess_compile_cpp,
+);
+my %extension = map { $_ => 1 } (
+ @source_no_preprocess,
+ @source_no_preprocess_compile,
+ @source_no_preprocess_compile_cpp,
+ @source_no_preprocess_no_compile,
+ @header_preprocess,
+ @source_preprocess,
+ @source_preprocess_compile,
+ @source_preprocess_compile_cpp,
+ @source_preprocess_no_compile,
+);
+
+# Regexp to match file extensions.
+my $file_extension_regex = qr/
+ \s
+ \S+ # Filename without extension.
+ \.
+ ([^\\.\s]+) # File extension.
+ (?=\s|\\) # At end of word. Can't use \b because some files have non
+ # word characters at the end and because \b matches double
+ # extensions (like .cpp.o). Works always as all lines are
+ # terminated with "\n".
/x;
# Expected (hardening) flags. All flags are used as regexps.
-my @cflags = (
+my @def_cflags = (
'-g',
'-O(?:2|3)',
);
-my @cflags_format = (
+my @def_cflags_format = (
'-Wformat',
'-Wformat-security',
'-Werror=format-security',
);
-my @cflags_fortify = (
+my @def_cflags_fortify = (
# fortify needs at least -O1, but -O2 is recommended anyway
);
-my @cflags_stack = (
+my @def_cflags_stack = (
'-fstack-protector',
'--param=ssp-buffer-size=4',
);
-my @cflags_pie = (
+my @def_cflags_pie = (
'-fPIE',
);
-my @cppflags = ();
-my @cppflags_fortify = (
+my @def_cxxflags = (
+ '-g',
+ '-O(?:2|3)',
+);
+# @def_cxxflags_* is the same as @def_cflags_*.
+my @def_cppflags = ();
+my @def_cppflags_fortify = (
'-D_FORTIFY_SOURCE=2',
);
-my @ldflags = ();
-my @ldflags_relro = (
+my @def_ldflags = ();
+my @def_ldflags_relro = (
'-Wl,(-z,)?relro',
);
-my @ldflags_bindnow = (
+my @def_ldflags_bindnow = (
'-Wl,(-z,)?now',
);
-my @ldflags_pie = (
+my @def_ldflags_pie = (
'-fPIE',
'-pie',
);
$file =~ m{/([a-zA-Z0-9._-]+)$};
$file = $1;
- if ($next_line =~ /\Q$file\E/ and $next_line =~ /$cc_regex/) {
+ if ($next_line =~ /\Q$file\E/ and $next_line =~ /$cc_regex/o) {
# We still have to skip the current line as it doesn't contain any
# compiler commands.
${$skip_ref} = 1;
return 1;
}
+sub extension_found {
+ my ($extensions_ref, @extensions) = @_;
-# MAIN
+ my $found = 0;
+ foreach my $extension (@extensions) {
+ if (exists $extensions_ref->{$extension}) {
+ $found = 1;
+ last;
+ }
+ }
+ return $found;
+}
-# Hardening options. Not all architectures support all hardening options.
-my $harden_format = 1;
-my $harden_fortify = 1;
-my $harden_stack = 1;
-my $harden_relro = 1;
-my $harden_bindnow = 0;
-my $harden_pie = 0;
+
+# MAIN
# Parse command line arguments.
my $option_help = 0;
my $option_version = 0;
+my $option_pie = 0;
+my $option_bindnow = 0;
my $option_all = 0;
my $option_arch = undef;
my $option_buildd = 0;
'help|h|?' => \$option_help,
'version' => \$option_version,
# Hardening options.
- 'pie' => \$harden_pie,
- 'bindnow' => \$harden_bindnow,
+ 'pie' => \$option_pie,
+ 'bindnow' => \$option_bindnow,
'all' => \$option_all,
# Misc.
'color' => \$option_color,
- 'arch' => \$option_arch,
+ 'arch=s' => \$option_arch,
'buildd' => \$option_buildd,
)) {
require Pod::Usage;
}
if ($option_all) {
- $harden_pie = 1;
- $harden_bindnow = 1;
+ $option_pie = 1;
+ $option_bindnow = 1;
}
# Final exit code.
my $exit = 0;
+FILE: foreach my $file (@ARGV) {
+open my $fh, '<', $file or die "$!: $file";
+
+# Hardening options. Not all architectures support all hardening options.
+my $harden_format = 1;
+my $harden_fortify = 1;
+my $harden_stack = 1;
+my $harden_relro = 1;
+my $harden_bindnow = $option_bindnow; # defaults to 0
+my $harden_pie = $option_pie; # defaults to 0
+
# Input lines, contain only the lines with compiler commands.
my @input = ();
my $start = 0;
my $continuation = 0;
my $complete_line = undef;
-while (my $line = <>) {
+while (my $line = <$fh>) {
# dpkg-buildflags only provides hardening flags since 1.16.1, don't check
# for hardening flags in buildd mode if an older dpkg-dev is used. Default
# flags (-g -O2) are still checked.
if (not $start and $line =~ /^Build-Depends: .*\bhardening-wrapper\b/) {
error_hardening_wrapper();
$exit |= 1 << 4;
- exit $exit;
+ next FILE;
}
# We skip over unimportant lines at the beginning of the log to prevent
}
# Ignore compiler warnings for now.
- next if $line =~ /$warning_regex/;
-
- # Remove all ANSI color sequences which are sometimes used in non-verbose
- # builds.
- $line = Term::ANSIColor::colorstrip($line);
- # Also strip '\0xf' (delete previous character), used by Elinks' build
- # system.
- $line =~ s/\x0f//g;
- # And "ESC(B" which seems to be used on armhf and hurd (not sure what it
- # does).
- $line =~ s/\033\(B//g;
+ next if $line =~ /$warning_regex/o;
+
+ if ($line =~ /\033/) { # esc
+ # Remove all ANSI color sequences which are sometimes used in
+ # non-verbose builds.
+ $line = Term::ANSIColor::colorstrip($line);
+ # Also strip '\0xf' (delete previous character), used by Elinks' build
+ # system.
+ $line =~ s/\x0f//g;
+ # And "ESC(B" which seems to be used on armhf and hurd (not sure what
+ # it does).
+ $line =~ s/\033\(B//g;
+ }
# Check if this line indicates a non verbose build.
my $non_verbose = is_non_verbose_build($line);
# line. parse_line() is slow, only use it when necessary.
my @line = (not $line =~ /;/)
? ($line)
- : Text::ParseWords::parse_line(';', 1, $line);
+ : map {
+ # Ensure newline at the line end - necessary for correct
+ # parsing later.
+ $_ =~ s/\s+$//;
+ $_ .= "\n";
+ } Text::ParseWords::parse_line(';', 1, $line);
foreach $line (@line) {
- # Add newline, drop all other whitespace at the end of a line.
- $line =~ s/\s+$//;
- $line .= "\n";
-
if ($continuation) {
$continuation = 0;
}
# Ignore lines with no compiler commands.
- next if $line !~ /\b$cc_regex(?:\s|\\)/ and not $non_verbose;
+ next if $line !~ /\b$cc_regex(?:\s|\\)/o and not $non_verbose;
# Ignore false positives.
#
(?:C|c)ompiler[\s.]*:?\s+
$cc_regex
(?:\s-std=[a-z0-9:+]+)?\s*$
- /x
- or $line =~ /^\s*(?:- )?(?:HOST_)?(?:CC|CXX)\s*=\s*$cc_regex\s*$/
+ /xo
+ or $line =~ /^\s*(?:- )?(?:HOST_)?(?:CC|CXX)\s*=\s*$cc_regex\s*$/o
or $line =~ /^\s*-- Check for working (?:C|CXX) compiler: /
or $line =~ /^\s*(?:echo )?Using [A-Z_]+\s*=\s*/;
+ # `make` output.
+ next if $line =~ /^Making [a-z]+ in \S+/; # e.g. "[...] in c++"
# Check if additional hardening options were used. Used to ensure
# they are used for the complete build.
- $harden_pie = 1 if any_flags_used($line, @cflags_pie, @ldflags_pie);
- $harden_bindnow = 1 if any_flags_used($line, @ldflags_bindnow);
+ $harden_pie = 1 if any_flags_used($line, @def_cflags_pie, @def_ldflags_pie);
+ $harden_bindnow = 1 if any_flags_used($line, @def_ldflags_bindnow);
push @input, $line;
}
}
}
+close $fh;
+
if (scalar @input == 0) {
print "No compiler commands!\n";
$exit |= 1;
- exit $exit;
+ next FILE;
}
# Option or auto detected.
}
}
+# Default values.
+my @cflags = @def_cflags;
+my @cxxflags = @def_cxxflags;
+my @cppflags = @def_cppflags;
+my @ldflags = @def_ldflags;
# Check the specified hardening options, same order as dpkg-buildflags.
if ($harden_pie) {
- @cflags = (@cflags, @cflags_pie);
- @ldflags = (@ldflags, @ldflags_pie);
+ @cflags = (@cflags, @def_cflags_pie);
+ @cxxflags = (@cxxflags, @def_cflags_pie);
+ @ldflags = (@ldflags, @def_ldflags_pie);
}
if ($harden_stack) {
- @cflags = (@cflags, @cflags_stack);
+ @cflags = (@cflags, @def_cflags_stack);
+ @cxxflags = (@cxxflags, @def_cflags_stack);
}
if ($harden_fortify) {
- @cflags = (@cflags, @cflags_fortify);
- @cppflags = (@cppflags, @cppflags_fortify);
+ @cflags = (@cflags, @def_cflags_fortify);
+ @cxxflags = (@cxxflags, @def_cflags_fortify);
+ @cppflags = (@cppflags, @def_cppflags_fortify);
}
if ($harden_format) {
- @cflags = (@cflags, @cflags_format);
+ @cflags = (@cflags, @def_cflags_format);
+ @cxxflags = (@cxxflags, @def_cflags_format);
}
if ($harden_relro) {
- @ldflags = (@ldflags, @ldflags_relro);
+ @ldflags = (@ldflags, @def_ldflags_relro);
}
if ($harden_bindnow) {
- @ldflags = (@ldflags, @ldflags_bindnow);
+ @ldflags = (@ldflags, @def_ldflags_bindnow);
}
for (my $i = 0; $i < scalar @input; $i++) {
# Even if it's a verbose build, we might have to skip this line.
next if $skip;
+ # Remove everything until and including the compiler command. Makes checks
+ # easier and faster.
+ $line =~ s/^.*?$cc_regex//o;
+
# Skip unnecessary tests when only preprocessing.
my $flag_preprocess = 0;
my $link = 0;
# Preprocess, compile, assemble.
- if ($line =~ /$cc_regex.*?\s(-E|-S|-c)\b/) {
+ if ($line =~ /\s(-E|-S|-c)\b/) {
$preprocess = 1;
$flag_preprocess = 1 if $1 eq '-E';
$compile = 1 if $1 eq '-S' or $1 eq '-c';
$link = 1;
}
+ # Get all file extensions on this line.
+ my @extensions = $line =~ /$file_extension_regex/go;
+ # Ignore all unknown extensions to speedup the search below.
+ @extensions = grep { exists $extension{$_} } @extensions;
+
# These file types don't require preprocessing.
- if ($line =~ /$file_no_preprocess_regex/) {
+ if (extension_found(\%extensions_no_preprocess, @extensions)) {
$preprocess = 0;
}
# These file types require preprocessing.
- if ($line =~ /$file_preprocess_regex/) {
+ if (extension_found(\%extensions_preprocess, @extensions)) {
$preprocess = 1;
}
# If there are source files then it's compiling/linking in one step and we
# must check both. We only check for source files here, because header
# files cause too many false positives.
- if (not $flag_preprocess and $line =~ /$file_compile_link_regex/) {
+ if (not $flag_preprocess
+ and extension_found(\%extensions_compile_link, @extensions)) {
# Assembly files don't need CFLAGS.
- if (not $line =~ /$file_compile_regex/
- and $line =~ /$file_no_compile_regex/) {
+ if (not extension_found(\%extensions_compile, @extensions)
+ and extension_found(\%extensions_no_compile, @extensions)) {
$compile = 0;
# But the rest does.
} else {
}
}
+ # Assume CXXFLAGS are required when a C++ file is specified in the
+ # compiler line.
+ my $compile_cpp = 0;
+ if ($compile
+ and extension_found(\%extensions_compile_cpp, @extensions)) {
+ $compile = 0;
+ $compile_cpp = 1;
+ }
+
# Check hardening flags.
my @missing;
if ($compile and not all_flags_used($line, \@missing, @cflags)
# Libraries linked with -fPIC don't have to (and can't) be linked
# with -fPIE as well. It's no error if only PIE flags are missing.
- and not pic_pie_conflict($line, $harden_pie, \@missing, @cflags_pie)
+ and not pic_pie_conflict($line, $harden_pie, \@missing, @def_cflags_pie)
# Assume dpkg-buildflags returns the correct flags.
- and not $line =~ /`dpkg-buildflags --get (?:CFLAGS|CXXFLAGS)`/) {
- error_flags('CFLAGS missing', \@missing, \%flag_renames, $line);
+ and not $line =~ /`dpkg-buildflags --get CFLAGS`/) {
+ error_flags('CFLAGS missing', \@missing, \%flag_renames, $input[$i]);
+ $exit |= 1 << 3;
+ } elsif ($compile_cpp and not all_flags_used($line, \@missing, @cflags)
+ # Libraries linked with -fPIC don't have to (and can't) be linked
+ # with -fPIE as well. It's no error if only PIE flags are missing.
+ and not pic_pie_conflict($line, $harden_pie, \@missing, @def_cflags_pie)
+ # Assume dpkg-buildflags returns the correct flags.
+ and not $line =~ /`dpkg-buildflags --get CXXFLAGS`/) {
+ error_flags('CXXFLAGS missing', \@missing, \%flag_renames, $input[$i]);
$exit |= 1 << 3;
}
if ($preprocess and not all_flags_used($line, \@missing, @cppflags)
# Assume dpkg-buildflags returns the correct flags.
and not $line =~ /`dpkg-buildflags --get CPPFLAGS`/) {
- error_flags('CPPFLAGS missing', \@missing, \%flag_renames, $line);
+ error_flags('CPPFLAGS missing', \@missing, \%flag_renames, $input[$i]);
$exit |= 1 << 3;
}
if ($link and not all_flags_used($line, \@missing, @ldflags)
# Same here, -fPIC conflicts with -fPIE.
- and not pic_pie_conflict($line, $harden_pie, \@missing, @ldflags_pie)
+ and not pic_pie_conflict($line, $harden_pie, \@missing, @def_ldflags_pie)
# Assume dpkg-buildflags returns the correct flags.
and not $line =~ /`dpkg-buildflags --get LDFLAGS`/) {
- error_flags('LDFLAGS missing', \@missing, \%flag_renames, $line);
+ error_flags('LDFLAGS missing', \@missing, \%flag_renames, $input[$i]);
$exit |= 1 << 3;
}
}
+}
exit $exit;
=head1 SYNOPSIS
-B<blhc> [-h -? --help]
+B<blhc> [options] <dpkg-buildpackage build log file>..
-B<blhc> [--pie] [--bindnow] [--all]
-
- --help available options
- --version version number and license
- --pie force +pie check
- --bindnow force +bindbow check
--all force +all (+pie, +bindnow) check
--arch set architecture (autodetected)
+ --bindnow force +bindbow check
--buildd parser mode for buildds
--color use colored output
+ --pie force +pie check
+ --help available options
+ --version version number and license
=head1 DESCRIPTION
=over 8
-=item B<-h -? --help>
-
-Print available options.
-
-=item B<--version>
-
-Print version number and license.
-
-=item B<--pie>
-
-Force check for all +pie hardening flags. By default it's auto detected.
-
-=item B<--bindnow>
-
-Force check for all +bindnow hardening flags. By default it's auto detected.
-
=item B<--all>
Force check for all +all (+pie, +bindnow) hardening flags. By default it's
disables hardening flags not available on this architecture. Is detected
automatically if dpkg-buildpackage is used.
+=item B<--bindnow>
+
+Force check for all +bindnow hardening flags. By default it's auto detected.
+
=item B<--buildd>
Special mode for buildds when automatically parsing log files. The following
Use colored (ANSI) output for warning messages.
+=item B<--pie>
+
+Force check for all +pie hardening flags. By default it's auto detected.
+
+=item B<-h -? --help>
+
+Print available options.
+
+=item B<--version>
+
+Print version number and license.
+
=back
Auto detection for B<--pie> and B<--bindnow> only works if at least one
The exit status is a "bit mask", each listed status is ORed when the error
condition occurs to get the result.
-=over 8
+=over 4
=item B<0>
ruderich.org/simon / blhc / blhc.git / blobdiff