blob: 3de10eccb94eff1f8f9f6fb336efe9b5365c36dc [file] [log] [blame]
# Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
#
# Licensed under the Apache License 2.0 (the "License"). You may not use
# this file except in compliance with the License. You can obtain a copy
# in the file LICENSE in the source distribution or at
# https://www.openssl.org/source/license.html
use strict;
use POSIX ":sys_wait_h";
package TLSProxy::Proxy;
use File::Spec;
use IO::Socket;
use IO::Select;
use TLSProxy::Record;
use TLSProxy::Message;
use TLSProxy::ClientHello;
use TLSProxy::ServerHello;
use TLSProxy::EncryptedExtensions;
use TLSProxy::Certificate;
use TLSProxy::CertificateRequest;
use TLSProxy::CertificateVerify;
use TLSProxy::ServerKeyExchange;
use TLSProxy::NewSessionTicket;
my $have_IPv6;
my $IP_factory;
BEGIN
{
# IO::Socket::IP is on the core module list, IO::Socket::INET6 isn't.
# However, IO::Socket::INET6 is older and is said to be more widely
# deployed for the moment, and may have less bugs, so we try the latter
# first, then fall back on the core modules. Worst case scenario, we
# fall back to IO::Socket::INET, only supports IPv4.
eval {
require IO::Socket::INET6;
my $s = IO::Socket::INET6->new(
LocalAddr => "::1",
LocalPort => 0,
Listen=>1,
);
$s or die "\n";
$s->close();
};
if ($@ eq "") {
$IP_factory = sub { IO::Socket::INET6->new(Domain => AF_INET6, @_); };
$have_IPv6 = 1;
} else {
eval {
require IO::Socket::IP;
my $s = IO::Socket::IP->new(
LocalAddr => "::1",
LocalPort => 0,
Listen=>1,
);
$s or die "\n";
$s->close();
};
if ($@ eq "") {
$IP_factory = sub { IO::Socket::IP->new(@_); };
$have_IPv6 = 1;
} else {
$IP_factory = sub { IO::Socket::INET->new(@_); };
$have_IPv6 = 0;
}
}
}
my $is_tls13 = 0;
my $ciphersuite = undef;
sub new
{
my $class = shift;
my ($filter,
$execute,
$cert,
$debug) = @_;
my $self = {
#Public read/write
proxy_addr => $have_IPv6 ? "[::1]" : "127.0.0.1",
filter => $filter,
serverflags => "",
clientflags => "",
serverconnects => 1,
reneg => 0,
sessionfile => undef,
#Public read
proxy_port => 0,
server_port => 0,
serverpid => 0,
clientpid => 0,
execute => $execute,
cert => $cert,
debug => $debug,
cipherc => "",
ciphersuitesc => "",
ciphers => "AES128-SHA",
ciphersuitess => "TLS_AES_128_GCM_SHA256",
flight => -1,
direction => -1,
partial => ["", ""],
record_list => [],
message_list => [],
};
# Create the Proxy socket
my $proxaddr = $self->{proxy_addr};
$proxaddr =~ s/[\[\]]//g; # Remove [ and ]
my @proxyargs = (
LocalHost => $proxaddr,
LocalPort => 0,
Proto => "tcp",
Listen => SOMAXCONN,
);
if (my $sock = $IP_factory->(@proxyargs)) {
$self->{proxy_sock} = $sock;
$self->{proxy_port} = $sock->sockport();
$self->{proxy_addr} = $sock->sockhost();
$self->{proxy_addr} =~ s/(.*:.*)/[$1]/;
print "Proxy started on port ",
"$self->{proxy_addr}:$self->{proxy_port}\n";
# use same address for s_server
$self->{server_addr} = $self->{proxy_addr};
} else {
warn "Failed creating proxy socket (".$proxaddr.",0): $!\n";
}
return bless $self, $class;
}
sub DESTROY
{
my $self = shift;
$self->{proxy_sock}->close() if $self->{proxy_sock};
}
sub clearClient
{
my $self = shift;
$self->{cipherc} = "";
$self->{ciphersuitec} = "";
$self->{flight} = -1;
$self->{direction} = -1;
$self->{partial} = ["", ""];
$self->{record_list} = [];
$self->{message_list} = [];
$self->{clientflags} = "";
$self->{sessionfile} = undef;
$self->{clientpid} = 0;
$is_tls13 = 0;
$ciphersuite = undef;
TLSProxy::Message->clear();
TLSProxy::Record->clear();
}
sub clear
{
my $self = shift;
$self->clearClient;
$self->{ciphers} = "AES128-SHA";
$self->{ciphersuitess} = "TLS_AES_128_GCM_SHA256";
$self->{serverflags} = "";
$self->{serverconnects} = 1;
$self->{serverpid} = 0;
$self->{reneg} = 0;
}
sub restart
{
my $self = shift;
$self->clear;
$self->start;
}
sub clientrestart
{
my $self = shift;
$self->clear;
$self->clientstart;
}
sub connect_to_server
{
my $self = shift;
my $servaddr = $self->{server_addr};
$servaddr =~ s/[\[\]]//g; # Remove [ and ]
my $sock = $IP_factory->(PeerAddr => $servaddr,
PeerPort => $self->{server_port},
Proto => 'tcp');
if (!defined($sock)) {
my $err = $!;
kill(3, $self->{real_serverpid});
die "unable to connect: $err\n";
}
$self->{server_sock} = $sock;
}
sub start
{
my ($self) = shift;
my $pid;
if ($self->{proxy_sock} == 0) {
return 0;
}
my $execcmd = $self->execute
." s_server -max_protocol TLSv1.3 -no_comp -rev -engine ossltest"
#In TLSv1.3 we issue two session tickets. The default session id
#callback gets confused because the ossltest engine causes the same
#session id to be created twice due to the changed random number
#generation. Using "-ext_cache" replaces the default callback with a
#different one that doesn't get confused.
." -ext_cache"
." -accept $self->{server_addr}:0"
." -cert ".$self->cert." -cert2 ".$self->cert
." -naccept ".$self->serverconnects;
if ($self->ciphers ne "") {
$execcmd .= " -cipher ".$self->ciphers;
}
if ($self->ciphersuitess ne "") {
$execcmd .= " -ciphersuites ".$self->ciphersuitess;
}
if ($self->serverflags ne "") {
$execcmd .= " ".$self->serverflags;
}
if ($self->debug) {
print STDERR "Server command: $execcmd\n";
}
open(my $savedin, "<&STDIN");
# Temporarily replace STDIN so that sink process can inherit it...
$pid = open(STDIN, "$execcmd 2>&1 |") or die "Failed to $execcmd: $!\n";
$self->{real_serverpid} = $pid;
# Process the output from s_server until we find the ACCEPT line, which
# tells us what the accepting address and port are.
while (<>) {
print;
s/\R$//; # Better chomp
next unless (/^ACCEPT\s.*:(\d+)$/);
$self->{server_port} = $1;
last;
}
if ($self->{server_port} == 0) {
# This actually means that s_server exited, because otherwise
# we would still searching for ACCEPT...
waitpid($pid, 0);
die "no ACCEPT detected in '$execcmd' output: $?\n";
}
# Just make sure everything else is simply printed [as separate lines].
# The sub process simply inherits our STD* and will keep consuming
# server's output and printing it as long as there is anything there,
# out of our way.
my $error;
$pid = undef;
if (eval { require Win32::Process; 1; }) {
if (Win32::Process::Create(my $h, $^X, "perl -ne print", 0, 0, ".")) {
$pid = $h->GetProcessID();
$self->{proc_handle} = $h; # hold handle till next round [or exit]
} else {
$error = Win32::FormatMessage(Win32::GetLastError());
}
} else {
if (defined($pid = fork)) {
$pid or exec("$^X -ne print") or exit($!);
} else {
$error = $!;
}
}
# Change back to original stdin
open(STDIN, "<&", $savedin);
close($savedin);
if (!defined($pid)) {
kill(3, $self->{real_serverpid});
die "Failed to capture s_server's output: $error\n";
}
$self->{serverpid} = $pid;
print STDERR "Server responds on ",
"$self->{server_addr}:$self->{server_port}\n";
# Connect right away...
$self->connect_to_server();
return $self->clientstart;
}
sub clientstart
{
my ($self) = shift;
if ($self->execute) {
my $pid;
my $execcmd = $self->execute
." s_client -max_protocol TLSv1.3 -engine ossltest"
." -connect $self->{proxy_addr}:$self->{proxy_port}";
if ($self->cipherc ne "") {
$execcmd .= " -cipher ".$self->cipherc;
}
if ($self->ciphersuitesc ne "") {
$execcmd .= " -ciphersuites ".$self->ciphersuitesc;
}
if ($self->clientflags ne "") {
$execcmd .= " ".$self->clientflags;
}
if ($self->clientflags !~ m/-(no)?servername/) {
$execcmd .= " -servername localhost";
}
if (defined $self->sessionfile) {
$execcmd .= " -ign_eof";
}
if ($self->debug) {
print STDERR "Client command: $execcmd\n";
}
open(my $savedout, ">&STDOUT");
# If we open pipe with new descriptor, attempt to close it,
# explicitly or implicitly, would incur waitpid and effectively
# dead-lock...
if (!($pid = open(STDOUT, "| $execcmd"))) {
my $err = $!;
kill(3, $self->{real_serverpid});
die "Failed to $execcmd: $err\n";
}
$self->{clientpid} = $pid;
# queue [magic] input
print $self->reneg ? "R" : "test";
# this closes client's stdin without waiting for its pid
open(STDOUT, ">&", $savedout);
close($savedout);
}
# Wait for incoming connection from client
my $fdset = IO::Select->new($self->{proxy_sock});
if (!$fdset->can_read(60)) {
kill(3, $self->{real_serverpid});
die "s_client didn't try to connect\n";
}
my $client_sock;
if(!($client_sock = $self->{proxy_sock}->accept())) {
warn "Failed accepting incoming connection: $!\n";
return 0;
}
print "Connection opened\n";
my $server_sock = $self->{server_sock};
my $indata;
#Wait for either the server socket or the client socket to become readable
$fdset = IO::Select->new($server_sock, $client_sock);
my @ready;
my $ctr = 0;
local $SIG{PIPE} = "IGNORE";
$self->{saw_session_ticket} = undef;
while($fdset->count && $ctr < 10) {
if (defined($self->{sessionfile})) {
# s_client got -ign_eof and won't be exiting voluntarily, so we
# look for data *and* session ticket...
last if TLSProxy::Message->success()
&& $self->{saw_session_ticket};
}
if (!(@ready = $fdset->can_read(1))) {
$ctr++;
next;
}
foreach my $hand (@ready) {
if ($hand == $server_sock) {
if ($server_sock->sysread($indata, 16384)) {
if ($indata = $self->process_packet(1, $indata)) {
$client_sock->syswrite($indata) or goto END;
}
$ctr = 0;
} else {
$fdset->remove($server_sock);
$client_sock->shutdown(SHUT_WR);
}
} elsif ($hand == $client_sock) {
if ($client_sock->sysread($indata, 16384)) {
if ($indata = $self->process_packet(0, $indata)) {
$server_sock->syswrite($indata) or goto END;
}
$ctr = 0;
} else {
$fdset->remove($client_sock);
$server_sock->shutdown(SHUT_WR);
}
} else {
kill(3, $self->{real_serverpid});
die "Unexpected handle";
}
}
}
if ($ctr >= 10) {
kill(3, $self->{real_serverpid});
die "No progress made";
}
END:
print "Connection closed\n";
if($server_sock) {
$server_sock->close();
$self->{server_sock} = undef;
}
if($client_sock) {
#Closing this also kills the child process
$client_sock->close();
}
my $pid;
if (--$self->{serverconnects} == 0) {
$pid = $self->{serverpid};
print "Waiting for 'perl -ne print' process to close: $pid...\n";
$pid = waitpid($pid, 0);
if ($pid > 0) {
die "exit code $? from 'perl -ne print' process\n" if $? != 0;
} elsif ($pid == 0) {
kill(3, $self->{real_serverpid});
die "lost control over $self->{serverpid}?";
}
$pid = $self->{real_serverpid};
print "Waiting for s_server process to close: $pid...\n";
# it's done already, just collect the exit code [and reap]...
waitpid($pid, 0);
die "exit code $? from s_server process\n" if $? != 0;
} else {
# It's a bit counter-intuitive spot to make next connection to
# the s_server. Rationale is that established connection works
# as synchronization point, in sense that this way we know that
# s_server is actually done with current session...
$self->connect_to_server();
}
$pid = $self->{clientpid};
print "Waiting for s_client process to close: $pid...\n";
waitpid($pid, 0);
return 1;
}
sub process_packet
{
my ($self, $server, $packet) = @_;
my $len_real;
my $decrypt_len;
my $data;
my $recnum;
if ($server) {
print "Received server packet\n";
} else {
print "Received client packet\n";
}
if ($self->{direction} != $server) {
$self->{flight} = $self->{flight} + 1;
$self->{direction} = $server;
}
print "Packet length = ".length($packet)."\n";
print "Processing flight ".$self->flight."\n";
#Return contains the list of record found in the packet followed by the
#list of messages in those records and any partial message
my @ret = TLSProxy::Record->get_records($server, $self->flight,
$self->{partial}[$server].$packet);
$self->{partial}[$server] = $ret[2];
push @{$self->{record_list}}, @{$ret[0]};
push @{$self->{message_list}}, @{$ret[1]};
print "\n";
if (scalar(@{$ret[0]}) == 0 or length($ret[2]) != 0) {
return "";
}
#Finished parsing. Call user provided filter here
if (defined $self->filter) {
$self->filter->($self);
}
#Take a note on NewSessionTicket
foreach my $message (reverse @{$self->{message_list}}) {
if ($message->{mt} == TLSProxy::Message::MT_NEW_SESSION_TICKET) {
$self->{saw_session_ticket} = 1;
last;
}
}
#Reconstruct the packet
$packet = "";
foreach my $record (@{$self->record_list}) {
$packet .= $record->reconstruct_record($server);
}
print "Forwarded packet length = ".length($packet)."\n\n";
return $packet;
}
#Read accessors
sub execute
{
my $self = shift;
return $self->{execute};
}
sub cert
{
my $self = shift;
return $self->{cert};
}
sub debug
{
my $self = shift;
return $self->{debug};
}
sub flight
{
my $self = shift;
return $self->{flight};
}
sub record_list
{
my $self = shift;
return $self->{record_list};
}
sub success
{
my $self = shift;
return $self->{success};
}
sub end
{
my $self = shift;
return $self->{end};
}
sub supports_IPv6
{
my $self = shift;
return $have_IPv6;
}
sub proxy_addr
{
my $self = shift;
return $self->{proxy_addr};
}
sub proxy_port
{
my $self = shift;
return $self->{proxy_port};
}
sub server_addr
{
my $self = shift;
return $self->{server_addr};
}
sub server_port
{
my $self = shift;
return $self->{server_port};
}
sub serverpid
{
my $self = shift;
return $self->{serverpid};
}
sub clientpid
{
my $self = shift;
return $self->{clientpid};
}
#Read/write accessors
sub filter
{
my $self = shift;
if (@_) {
$self->{filter} = shift;
}
return $self->{filter};
}
sub cipherc
{
my $self = shift;
if (@_) {
$self->{cipherc} = shift;
}
return $self->{cipherc};
}
sub ciphersuitesc
{
my $self = shift;
if (@_) {
$self->{ciphersuitesc} = shift;
}
return $self->{ciphersuitesc};
}
sub ciphers
{
my $self = shift;
if (@_) {
$self->{ciphers} = shift;
}
return $self->{ciphers};
}
sub ciphersuitess
{
my $self = shift;
if (@_) {
$self->{ciphersuitess} = shift;
}
return $self->{ciphersuitess};
}
sub serverflags
{
my $self = shift;
if (@_) {
$self->{serverflags} = shift;
}
return $self->{serverflags};
}
sub clientflags
{
my $self = shift;
if (@_) {
$self->{clientflags} = shift;
}
return $self->{clientflags};
}
sub serverconnects
{
my $self = shift;
if (@_) {
$self->{serverconnects} = shift;
}
return $self->{serverconnects};
}
# This is a bit ugly because the caller is responsible for keeping the records
# in sync with the updated message list; simply updating the message list isn't
# sufficient to get the proxy to forward the new message.
# But it does the trick for the one test (test_sslsessiontick) that needs it.
sub message_list
{
my $self = shift;
if (@_) {
$self->{message_list} = shift;
}
return $self->{message_list};
}
sub fill_known_data
{
my $length = shift;
my $ret = "";
for (my $i = 0; $i < $length; $i++) {
$ret .= chr($i);
}
return $ret;
}
sub is_tls13
{
my $class = shift;
if (@_) {
$is_tls13 = shift;
}
return $is_tls13;
}
sub reneg
{
my $self = shift;
if (@_) {
$self->{reneg} = shift;
}
return $self->{reneg};
}
#Setting a sessionfile means that the client will not close until the given
#file exists. This is useful in TLSv1.3 where otherwise s_client will close
#immediately at the end of the handshake, but before the session has been
#received from the server. A side effect of this is that s_client never sends
#a close_notify, so instead we consider success to be when it sends application
#data over the connection.
sub sessionfile
{
my $self = shift;
if (@_) {
$self->{sessionfile} = shift;
TLSProxy::Message->successondata(1);
}
return $self->{sessionfile};
}
sub ciphersuite
{
my $class = shift;
if (@_) {
$ciphersuite = shift;
}
return $ciphersuite;
}
1;