86 lines
2.7 KiB
Perl
Executable file
86 lines
2.7 KiB
Perl
Executable file
#!/usr/bin/env perl
|
|
|
|
# Find functions making recursive calls to themselves.
|
|
# (Multiple recursion where a() calls b() which calls a() not covered.)
|
|
#
|
|
# When the recursion depth might depend on data controlled by the attacker in
|
|
# an unbounded way, those functions should use interation instead.
|
|
#
|
|
# Typical usage: scripts/recursion.pl library/*.c
|
|
#
|
|
# Copyright The Mbed TLS Contributors
|
|
# SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
|
|
#
|
|
# This file is provided under the Apache License 2.0, or the
|
|
# GNU General Public License v2.0 or later.
|
|
#
|
|
# **********
|
|
# Apache License 2.0:
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
# not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
#
|
|
# **********
|
|
#
|
|
# **********
|
|
# GNU General Public License v2.0 or later:
|
|
#
|
|
# 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
|
|
# the Free Software Foundation; either version 2 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License along
|
|
# with this program; if not, write to the Free Software Foundation, Inc.,
|
|
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
#
|
|
# **********
|
|
|
|
use warnings;
|
|
use strict;
|
|
|
|
use utf8;
|
|
use open qw(:std utf8);
|
|
|
|
# exclude functions that are ok:
|
|
# - mpi_write_hlp: bounded by size of mbedtls_mpi, a compile-time constant
|
|
# - x509_crt_verify_child: bounded by MBEDTLS_X509_MAX_INTERMEDIATE_CA
|
|
my $known_ok = qr/mpi_write_hlp|x509_crt_verify_child/;
|
|
|
|
my $cur_name;
|
|
my $inside;
|
|
my @funcs;
|
|
|
|
die "Usage: $0 file.c [...]\n" unless @ARGV;
|
|
|
|
while (<>)
|
|
{
|
|
if( /^[^\/#{}\s]/ && ! /\[.*]/ ) {
|
|
chomp( $cur_name = $_ ) unless $inside;
|
|
} elsif( /^{/ && $cur_name ) {
|
|
$inside = 1;
|
|
$cur_name =~ s/.* ([^ ]*)\(.*/$1/;
|
|
} elsif( /^}/ && $inside ) {
|
|
undef $inside;
|
|
undef $cur_name;
|
|
} elsif( $inside && /\b\Q$cur_name\E\([^)]/ ) {
|
|
push @funcs, $cur_name unless /$known_ok/;
|
|
}
|
|
}
|
|
|
|
print "$_\n" for @funcs;
|
|
exit @funcs;
|