730 lines
18 KiB
Perl
730 lines
18 KiB
Perl
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# Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
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#
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# Licensed under the Apache License 2.0 (the "License"). You may not use
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# this file except in compliance with the License. You can obtain a copy
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# in the file LICENSE in the source distribution or at
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# https://www.openssl.org/source/license.html
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use strict;
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use POSIX ":sys_wait_h";
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package TLSProxy::Proxy;
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use File::Spec;
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use IO::Socket;
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use IO::Select;
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use TLSProxy::Record;
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use TLSProxy::Message;
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use TLSProxy::ClientHello;
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use TLSProxy::ServerHello;
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use TLSProxy::EncryptedExtensions;
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use TLSProxy::Certificate;
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use TLSProxy::CertificateRequest;
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use TLSProxy::CertificateVerify;
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use TLSProxy::ServerKeyExchange;
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use TLSProxy::NewSessionTicket;
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my $have_IPv6;
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my $IP_factory;
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BEGIN
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{
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# IO::Socket::IP is on the core module list, IO::Socket::INET6 isn't.
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# However, IO::Socket::INET6 is older and is said to be more widely
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# deployed for the moment, and may have less bugs, so we try the latter
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# first, then fall back on the core modules. Worst case scenario, we
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# fall back to IO::Socket::INET, only supports IPv4.
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eval {
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require IO::Socket::INET6;
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my $s = IO::Socket::INET6->new(
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LocalAddr => "::1",
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LocalPort => 0,
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Listen=>1,
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);
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$s or die "\n";
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$s->close();
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};
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if ($@ eq "") {
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$IP_factory = sub { IO::Socket::INET6->new(Domain => AF_INET6, @_); };
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$have_IPv6 = 1;
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} else {
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eval {
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require IO::Socket::IP;
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my $s = IO::Socket::IP->new(
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LocalAddr => "::1",
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LocalPort => 0,
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Listen=>1,
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);
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$s or die "\n";
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$s->close();
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};
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if ($@ eq "") {
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$IP_factory = sub { IO::Socket::IP->new(@_); };
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$have_IPv6 = 1;
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} else {
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$IP_factory = sub { IO::Socket::INET->new(@_); };
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$have_IPv6 = 0;
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}
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}
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}
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my $is_tls13 = 0;
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my $ciphersuite = undef;
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sub new
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{
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my $class = shift;
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my ($filter,
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$execute,
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$cert,
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$debug) = @_;
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my $self = {
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#Public read/write
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proxy_addr => $have_IPv6 ? "[::1]" : "127.0.0.1",
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filter => $filter,
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serverflags => "",
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clientflags => "",
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serverconnects => 1,
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reneg => 0,
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sessionfile => undef,
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#Public read
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proxy_port => 0,
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server_port => 0,
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serverpid => 0,
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clientpid => 0,
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execute => $execute,
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cert => $cert,
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debug => $debug,
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cipherc => "",
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ciphersuitesc => "",
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ciphers => "AES128-SHA",
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ciphersuitess => "TLS_AES_128_GCM_SHA256",
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flight => -1,
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direction => -1,
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partial => ["", ""],
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record_list => [],
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message_list => [],
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};
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# Create the Proxy socket
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my $proxaddr = $self->{proxy_addr};
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$proxaddr =~ s/[\[\]]//g; # Remove [ and ]
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my @proxyargs = (
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LocalHost => $proxaddr,
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LocalPort => 0,
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Proto => "tcp",
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Listen => SOMAXCONN,
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);
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if (my $sock = $IP_factory->(@proxyargs)) {
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$self->{proxy_sock} = $sock;
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$self->{proxy_port} = $sock->sockport();
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$self->{proxy_addr} = $sock->sockhost();
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$self->{proxy_addr} =~ s/(.*:.*)/[$1]/;
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print "Proxy started on port ",
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"$self->{proxy_addr}:$self->{proxy_port}\n";
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# use same address for s_server
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$self->{server_addr} = $self->{proxy_addr};
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} else {
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warn "Failed creating proxy socket (".$proxaddr.",0): $!\n";
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}
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return bless $self, $class;
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}
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sub DESTROY
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{
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my $self = shift;
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$self->{proxy_sock}->close() if $self->{proxy_sock};
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}
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sub clearClient
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{
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my $self = shift;
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$self->{cipherc} = "";
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$self->{ciphersuitec} = "";
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$self->{flight} = -1;
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$self->{direction} = -1;
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$self->{partial} = ["", ""];
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$self->{record_list} = [];
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$self->{message_list} = [];
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$self->{clientflags} = "";
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$self->{sessionfile} = undef;
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$self->{clientpid} = 0;
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$is_tls13 = 0;
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$ciphersuite = undef;
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TLSProxy::Message->clear();
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TLSProxy::Record->clear();
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}
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sub clear
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{
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my $self = shift;
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$self->clearClient;
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$self->{ciphers} = "AES128-SHA";
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$self->{ciphersuitess} = "TLS_AES_128_GCM_SHA256";
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$self->{serverflags} = "";
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$self->{serverconnects} = 1;
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$self->{serverpid} = 0;
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$self->{reneg} = 0;
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}
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sub restart
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{
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my $self = shift;
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$self->clear;
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$self->start;
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}
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sub clientrestart
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{
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my $self = shift;
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$self->clear;
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$self->clientstart;
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}
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sub connect_to_server
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{
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my $self = shift;
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my $servaddr = $self->{server_addr};
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$servaddr =~ s/[\[\]]//g; # Remove [ and ]
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my $sock = $IP_factory->(PeerAddr => $servaddr,
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PeerPort => $self->{server_port},
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Proto => 'tcp');
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if (!defined($sock)) {
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my $err = $!;
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kill(3, $self->{real_serverpid});
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die "unable to connect: $err\n";
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}
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$self->{server_sock} = $sock;
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}
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sub start
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{
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my ($self) = shift;
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my $pid;
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if ($self->{proxy_sock} == 0) {
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return 0;
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}
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my $execcmd = $self->execute
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." s_server -max_protocol TLSv1.3 -no_comp -rev -engine ossltest"
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#In TLSv1.3 we issue two session tickets. The default session id
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#callback gets confused because the ossltest engine causes the same
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#session id to be created twice due to the changed random number
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#generation. Using "-ext_cache" replaces the default callback with a
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#different one that doesn't get confused.
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." -ext_cache"
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." -accept $self->{server_addr}:0"
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." -cert ".$self->cert." -cert2 ".$self->cert
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." -naccept ".$self->serverconnects;
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if ($self->ciphers ne "") {
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$execcmd .= " -cipher ".$self->ciphers;
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}
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if ($self->ciphersuitess ne "") {
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$execcmd .= " -ciphersuites ".$self->ciphersuitess;
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}
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if ($self->serverflags ne "") {
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$execcmd .= " ".$self->serverflags;
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}
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if ($self->debug) {
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print STDERR "Server command: $execcmd\n";
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}
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open(my $savedin, "<&STDIN");
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# Temporarily replace STDIN so that sink process can inherit it...
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$pid = open(STDIN, "$execcmd 2>&1 |") or die "Failed to $execcmd: $!\n";
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$self->{real_serverpid} = $pid;
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# Process the output from s_server until we find the ACCEPT line, which
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# tells us what the accepting address and port are.
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while (<>) {
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print;
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s/\R$//; # Better chomp
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next unless (/^ACCEPT\s.*:(\d+)$/);
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$self->{server_port} = $1;
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last;
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}
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if ($self->{server_port} == 0) {
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# This actually means that s_server exited, because otherwise
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# we would still searching for ACCEPT...
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waitpid($pid, 0);
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die "no ACCEPT detected in '$execcmd' output: $?\n";
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}
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# Just make sure everything else is simply printed [as separate lines].
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# The sub process simply inherits our STD* and will keep consuming
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# server's output and printing it as long as there is anything there,
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# out of our way.
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my $error;
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$pid = undef;
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if (eval { require Win32::Process; 1; }) {
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if (Win32::Process::Create(my $h, $^X, "perl -ne print", 0, 0, ".")) {
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$pid = $h->GetProcessID();
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$self->{proc_handle} = $h; # hold handle till next round [or exit]
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} else {
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$error = Win32::FormatMessage(Win32::GetLastError());
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}
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} else {
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if (defined($pid = fork)) {
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$pid or exec("$^X -ne print") or exit($!);
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} else {
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$error = $!;
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}
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}
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# Change back to original stdin
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open(STDIN, "<&", $savedin);
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close($savedin);
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if (!defined($pid)) {
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kill(3, $self->{real_serverpid});
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die "Failed to capture s_server's output: $error\n";
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}
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$self->{serverpid} = $pid;
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print STDERR "Server responds on ",
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"$self->{server_addr}:$self->{server_port}\n";
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# Connect right away...
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$self->connect_to_server();
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return $self->clientstart;
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}
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sub clientstart
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{
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my ($self) = shift;
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if ($self->execute) {
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my $pid;
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my $execcmd = $self->execute
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." s_client -max_protocol TLSv1.3 -engine ossltest"
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." -connect $self->{proxy_addr}:$self->{proxy_port}";
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if ($self->cipherc ne "") {
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$execcmd .= " -cipher ".$self->cipherc;
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}
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if ($self->ciphersuitesc ne "") {
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$execcmd .= " -ciphersuites ".$self->ciphersuitesc;
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}
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if ($self->clientflags ne "") {
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$execcmd .= " ".$self->clientflags;
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}
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if ($self->clientflags !~ m/-(no)?servername/) {
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$execcmd .= " -servername localhost";
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}
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if (defined $self->sessionfile) {
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$execcmd .= " -ign_eof";
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}
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if ($self->debug) {
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print STDERR "Client command: $execcmd\n";
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}
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open(my $savedout, ">&STDOUT");
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# If we open pipe with new descriptor, attempt to close it,
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# explicitly or implicitly, would incur waitpid and effectively
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# dead-lock...
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if (!($pid = open(STDOUT, "| $execcmd"))) {
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my $err = $!;
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kill(3, $self->{real_serverpid});
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die "Failed to $execcmd: $err\n";
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}
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$self->{clientpid} = $pid;
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# queue [magic] input
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print $self->reneg ? "R" : "test";
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# this closes client's stdin without waiting for its pid
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open(STDOUT, ">&", $savedout);
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close($savedout);
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}
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# Wait for incoming connection from client
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my $fdset = IO::Select->new($self->{proxy_sock});
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if (!$fdset->can_read(60)) {
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kill(3, $self->{real_serverpid});
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die "s_client didn't try to connect\n";
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}
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my $client_sock;
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if(!($client_sock = $self->{proxy_sock}->accept())) {
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warn "Failed accepting incoming connection: $!\n";
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return 0;
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}
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print "Connection opened\n";
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my $server_sock = $self->{server_sock};
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my $indata;
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#Wait for either the server socket or the client socket to become readable
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$fdset = IO::Select->new($server_sock, $client_sock);
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my @ready;
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my $ctr = 0;
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local $SIG{PIPE} = "IGNORE";
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$self->{saw_session_ticket} = undef;
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while($fdset->count && $ctr < 10) {
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if (defined($self->{sessionfile})) {
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# s_client got -ign_eof and won't be exiting voluntarily, so we
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# look for data *and* session ticket...
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last if TLSProxy::Message->success()
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&& $self->{saw_session_ticket};
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|
}
|
||
|
|
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;
|