mirror of
https://github.com/pineappleEA/pineapple-src.git
synced 2024-11-26 11:08:26 -05:00
45 lines
1.1 KiB
Perl
45 lines
1.1 KiB
Perl
|
#!/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
|
||
|
|
|
||
|
|
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;
|