mirror of
https://github.com/yuzu-emu/mbedtls.git
synced 2024-11-27 10:04:25 +01:00
d50177fdf3
Fixed a bug in ssl_srv.c when parsing TLS_FALLBACK_SCSV in the ciphersuite list that caused it to miss it sometimes. Reported by Hugo Leisink as issue #810. Fix initially by @andreasag01; this commit isolates the bug fix and adds a non-regression test.
87 lines
2.6 KiB
Perl
Executable File
87 lines
2.6 KiB
Perl
Executable File
#!/usr/bin/env perl
|
|
|
|
# A simple TCP client that sends some data and expects a response.
|
|
# Usage: tcp_client.pl HOSTNAME PORT DATA1 RESPONSE1
|
|
# DATA: hex-encoded data to send to the server
|
|
# RESPONSE: regexp that must match the server's response
|
|
|
|
use warnings;
|
|
use strict;
|
|
use IO::Socket::INET;
|
|
|
|
# Pack hex digits into a binary string, ignoring whitespace.
|
|
sub parse_hex {
|
|
my ($hex) = @_;
|
|
$hex =~ s/\s+//g;
|
|
return pack('H*', $hex);
|
|
}
|
|
|
|
## Open a TCP connection to the specified host and port.
|
|
sub open_connection {
|
|
my ($host, $port) = @_;
|
|
my $socket = IO::Socket::INET->new(PeerAddr => $host,
|
|
PeerPort => $port,
|
|
Proto => 'tcp',
|
|
Timeout => 1);
|
|
die "Cannot connect to $host:$port: $!" unless $socket;
|
|
return $socket;
|
|
}
|
|
|
|
## Close the TCP connection.
|
|
sub close_connection {
|
|
my ($connection) = @_;
|
|
$connection->shutdown(2);
|
|
# Ignore shutdown failures (at least for now)
|
|
return 1;
|
|
}
|
|
|
|
## Write the given data, expressed as hexadecimal
|
|
sub write_data {
|
|
my ($connection, $hexdata) = @_;
|
|
my $data = parse_hex($hexdata);
|
|
my $total_sent = 0;
|
|
while ($total_sent < length($data)) {
|
|
my $sent = $connection->send($data, 0);
|
|
if (!defined $sent) {
|
|
die "Unable to send data: $!";
|
|
}
|
|
$total_sent += $sent;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
## Read a response and check it against an expected prefix
|
|
sub read_response {
|
|
my ($connection, $expected_hex) = @_;
|
|
my $expected_data = parse_hex($expected_hex);
|
|
my $start_offset = 0;
|
|
while ($start_offset < length($expected_data)) {
|
|
my $actual_data;
|
|
my $ok = $connection->recv($actual_data, length($expected_data));
|
|
if (!defined $ok) {
|
|
die "Unable to receive data: $!";
|
|
}
|
|
if (($actual_data ^ substr($expected_data, $start_offset)) =~ /[^\000]/) {
|
|
printf STDERR ("Received \\x%02x instead of \\x%02x at offset %d\n",
|
|
ord(substr($actual_data, $-[0], 1)),
|
|
ord(substr($expected_data, $start_offset + $-[0], 1)),
|
|
$start_offset + $-[0]);
|
|
return 0;
|
|
}
|
|
$start_offset += length($actual_data);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
if (@ARGV != 4) {
|
|
print STDERR "Usage: $0 HOSTNAME PORT DATA1 RESPONSE1\n";
|
|
exit(3);
|
|
}
|
|
my ($host, $port, $data1, $response1) = @ARGV;
|
|
my $connection = open_connection($host, $port);
|
|
write_data($connection, $data1);
|
|
if (!read_response($connection, $response1)) {
|
|
exit(1);
|
|
}
|
|
close_connection($connection);
|