365 lines
9.2 KiB
Perl
365 lines
9.2 KiB
Perl
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# Written by Matt Caswell for the OpenSSL project.
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# ====================================================================
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# Copyright (c) 1998-2015 The OpenSSL Project. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in
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# the documentation and/or other materials provided with the
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# distribution.
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#
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# 3. All advertising materials mentioning features or use of this
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# software must display the following acknowledgment:
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# "This product includes software developed by the OpenSSL Project
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# for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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#
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# 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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# endorse or promote products derived from this software without
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# prior written permission. For written permission, please contact
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# openssl-core@openssl.org.
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#
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# 5. Products derived from this software may not be called "OpenSSL"
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# nor may "OpenSSL" appear in their names without prior written
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# permission of the OpenSSL Project.
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#
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# 6. Redistributions of any form whatsoever must retain the following
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# acknowledgment:
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# "This product includes software developed by the OpenSSL Project
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# for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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#
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# THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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# EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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# ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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# OF THE POSSIBILITY OF SUCH DAMAGE.
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# ====================================================================
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#
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# This product includes cryptographic software written by Eric Young
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# (eay@cryptsoft.com). This product includes software written by Tim
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# Hudson (tjh@cryptsoft.com).
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use strict;
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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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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 => "localhost",
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proxy_port => 4453,
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server_addr => "localhost",
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server_port => 4443,
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filter => $filter,
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#Public read
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execute => $execute,
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cert => $cert,
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debug => $debug,
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flight => 0,
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record_list => [],
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message_list => [],
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#Private
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message_rec_list => []
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};
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return bless $self, $class;
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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->{flight} = 0;
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$self->{record_list} = [];
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$self->{message_list} = [];
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$self->{message_rec_list} = [];
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TLSProxy::Message->clear();
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TLSProxy::Record->clear();
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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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$self->start;
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}
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sub start
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{
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my ($self) = shift;
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my $pid;
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$pid = fork();
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if ($pid == 0) {
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open(STDOUT, ">", File::Spec->devnull())
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or die "Failed to redirect stdout";
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open(STDERR, ">&STDOUT");
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exec($self->execute." s_server -testmode -accept ".($self->server_port)
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." -cert ".$self->cert." -naccept 1");
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}
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my $oldstdout;
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if(!$self->debug) {
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$oldstdout = select(File::Spec->devnull());
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}
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# Create the Proxy socket
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my $proxy_sock = new IO::Socket::INET(
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LocalHost => $self->proxy_addr,
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LocalPort => $self->proxy_port,
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Proto => "tcp",
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Listen => SOMAXCONN,
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Reuse => 1
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);
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if ($proxy_sock) {
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print "Proxy started on port ".$self->proxy_port."\n";
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} else {
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die "Failed creating proxy socket\n";
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}
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if ($self->execute) {
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my $pid = fork();
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if ($pid == 0) {
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open(STDOUT, ">", File::Spec->devnull())
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or die "Failed to redirect stdout";
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open(STDERR, ">&STDOUT");
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exec($self->execute
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." s_client -cipher AES128-SHA -testmode -connect "
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.($self->proxy_addr).":".($self->proxy_port));
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}
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}
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# Wait for incoming connection from client
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my $client_sock = $proxy_sock->accept()
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or die "Failed accepting incoming connection\n";
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print "Connection opened\n";
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# Now connect to the server
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my $retry = 3;
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my $server_sock;
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#We loop over this a few times because sometimes s_server can take a while
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#to start up
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do {
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$server_sock = new IO::Socket::INET(
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PeerAddr => $self->server_addr,
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PeerPort => $self->server_port,
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Proto => 'tcp'
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);
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$retry--;
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if (!$server_sock) {
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if ($retry) {
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#Sleep for a short while
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select(undef, undef, undef, 0.1);
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} else {
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die "Failed to start up server\n";
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}
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}
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} while (!$server_sock);
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my $sel = IO::Select->new($server_sock, $client_sock);
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my $indata;
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my @handles = ($server_sock, $client_sock);
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#Wait for either the server socket or the client socket to become readable
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my @ready;
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while(!(TLSProxy::Message->end) && (@ready = $sel->can_read)) {
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foreach my $hand (@ready) {
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if ($hand == $server_sock) {
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$server_sock->sysread($indata, 16384) or goto END;
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$indata = $self->process_packet(1, $indata);
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$client_sock->syswrite($indata);
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} elsif ($hand == $client_sock) {
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$client_sock->sysread($indata, 16384) or goto END;
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$indata = $self->process_packet(0, $indata);
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$server_sock->syswrite($indata);
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} else {
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print "Err\n";
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goto END;
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}
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}
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}
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END:
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print "Connection closed\n";
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if($server_sock) {
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$server_sock->close();
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}
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if($client_sock) {
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#Closing this also kills the child process
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$client_sock->close();
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}
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if($proxy_sock) {
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$proxy_sock->close();
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}
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if(!$self->debug) {
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select($oldstdout);
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}
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}
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sub process_packet
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{
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my ($self, $server, $packet) = @_;
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my $len_real;
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my $decrypt_len;
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my $data;
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my $recnum;
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if ($server) {
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print "Received server packet\n";
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} else {
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print "Received client packet\n";
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}
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print "Packet length = ".length($packet)."\n";
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print "Processing flight ".$self->flight."\n";
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#Return contains the list of record found in the packet followed by the
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#list of messages in those records
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my @ret = TLSProxy::Record->get_records($server, $self->flight, $packet);
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push @{$self->record_list}, @{$ret[0]};
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$self->{message_rec_list} = $ret[0];
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push @{$self->{message_list}}, @{$ret[1]};
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print "\n";
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#Finished parsing. Call user provided filter here
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$self->filter->($self);
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#Reconstruct the packet
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$packet = "";
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foreach my $record (@{$self->record_list}) {
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#We only replay the records for the current flight
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if ($record->flight != $self->flight) {
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next;
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}
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$packet .= $record->reconstruct_record();
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}
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$self->{flight} = $self->{flight} + 1;
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print "Forwarded packet length = ".length($packet)."\n\n";
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return $packet;
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}
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#Read accessors
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sub execute
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{
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my $self = shift;
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return $self->{execute};
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}
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sub cert
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{
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my $self = shift;
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return $self->{cert};
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}
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sub debug
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{
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my $self = shift;
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return $self->{debug};
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}
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sub flight
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{
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my $self = shift;
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return $self->{flight};
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}
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sub record_list
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{
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my $self = shift;
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return $self->{record_list};
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}
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sub message_list
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{
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my $self = shift;
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return $self->{message_list};
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}
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sub success
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{
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my $self = shift;
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return $self->{success};
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}
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sub end
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{
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my $self = shift;
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return $self->{end};
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}
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#Read/write accessors
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sub proxy_addr
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{
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my $self = shift;
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if (@_) {
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$self->{proxy_addr} = shift;
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}
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return $self->{proxy_addr};
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}
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sub proxy_port
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{
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my $self = shift;
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if (@_) {
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$self->{proxy_port} = shift;
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}
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return $self->{proxy_port};
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}
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sub server_addr
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{
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my $self = shift;
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if (@_) {
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$self->{server_addr} = shift;
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}
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return $self->{server_addr};
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}
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sub server_port
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{
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my $self = shift;
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if (@_) {
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$self->{server_port} = shift;
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}
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return $self->{server_port};
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}
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sub filter
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{
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my $self = shift;
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if (@_) {
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$self->{filter} = shift;
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}
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return $self->{filter};
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}
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1;
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