1 # Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
3 # Licensed under the OpenSSL license (the "License"). You may not use
4 # this file except in compliance with the License. You can obtain a copy
5 # in the file LICENSE in the source distribution or at
6 # https://www.openssl.org/source/license.html
10 package TLSProxy::ServerHello;
13 push @ISA, 'TLSProxy::Message';
22 $message_frag_lens) = @_;
24 my $self = $class->SUPER::new(
26 TLSProxy::Message::MT_SERVER_HELLO,
32 $self->{server_version} = 0;
34 $self->{session_id_len} = 0;
35 $self->{session} = "";
36 $self->{ciphersuite} = 0;
37 $self->{comp_meth} = 0;
38 $self->{extension_data} = "";
47 my ($server_version) = unpack('n', $self->data);
49 # TODO(TLS1.3): Replace this reference to draft version before release
50 if ($server_version == TLSProxy::Record::VERS_TLS_1_3_DRAFT) {
51 $server_version = TLSProxy::Record::VERS_TLS_1_3;
52 TLSProxy::Proxy->is_tls13(1);
55 my $random = substr($self->data, $ptr, 32);
57 my $session_id_len = 0;
59 if (!TLSProxy::Proxy->is_tls13()) {
60 $session_id_len = unpack('C', substr($self->data, $ptr));
62 $session = substr($self->data, $ptr, $session_id_len);
63 $ptr += $session_id_len;
65 my $ciphersuite = unpack('n', substr($self->data, $ptr));
68 if (!TLSProxy::Proxy->is_tls13()) {
69 $comp_meth = unpack('C', substr($self->data, $ptr));
72 my $extensions_len = unpack('n', substr($self->data, $ptr));
73 if (!defined $extensions_len) {
78 #For now we just deal with this as a block of data. In the future we will
81 if ($extensions_len != 0) {
82 $extension_data = substr($self->data, $ptr);
84 if (length($extension_data) != $extensions_len) {
85 die "Invalid extension length\n";
88 if (length($self->data) != $ptr) {
89 die "Invalid extension length\n";
94 while (length($extension_data) >= 4) {
95 my ($type, $size) = unpack("nn", $extension_data);
96 my $extdata = substr($extension_data, 4, $size);
97 $extension_data = substr($extension_data, 4 + $size);
98 $extensions{$type} = $extdata;
101 $self->server_version($server_version);
102 $self->random($random);
103 $self->session_id_len($session_id_len);
104 $self->session($session);
105 $self->ciphersuite($ciphersuite);
106 TLSProxy::Proxy->ciphersuite($ciphersuite);
107 $self->comp_meth($comp_meth);
108 $self->extension_data(\%extensions);
110 $self->process_data();
112 if (TLSProxy::Proxy->is_tls13()) {
113 TLSProxy::Record->server_encrypting(1);
114 TLSProxy::Record->client_encrypting(1);
117 print " Server Version:".$server_version."\n";
118 print " Session ID Len:".$session_id_len."\n";
119 print " Ciphersuite:".$ciphersuite."\n";
120 print " Compression Method:".$comp_meth."\n";
121 print " Extensions Len:".$extensions_len."\n";
124 #Perform any actions necessary based on the data we've seen
129 TLSProxy::Message->ciphersuite($self->ciphersuite);
132 #Reconstruct the on-the-wire message data following changes
133 sub set_message_contents
139 $data = pack('n', $self->server_version);
140 $data .= $self->random;
141 if (!TLSProxy::Proxy->is_tls13()) {
142 $data .= pack('C', $self->session_id_len);
143 $data .= $self->session;
145 $data .= pack('n', $self->ciphersuite);
146 if (!TLSProxy::Proxy->is_tls13()) {
147 $data .= pack('C', $self->comp_meth);
150 foreach my $key (keys %{$self->extension_data}) {
151 my $extdata = ${$self->extension_data}{$key};
152 $extensions .= pack("n", $key);
153 $extensions .= pack("n", length($extdata));
154 $extensions .= $extdata;
155 if ($key == TLSProxy::Message::EXT_DUPLICATE_EXTENSION) {
156 $extensions .= pack("n", $key);
157 $extensions .= pack("n", length($extdata));
158 $extensions .= $extdata;
162 $data .= pack('n', length($extensions));
163 $data .= $extensions;
167 #Read/write accessors
172 $self->{server_version} = shift;
174 return $self->{server_version};
180 $self->{random} = shift;
182 return $self->{random};
188 $self->{session_id_len} = shift;
190 return $self->{session_id_len};
196 $self->{session} = shift;
198 return $self->{session};
204 $self->{ciphersuite} = shift;
206 return $self->{ciphersuite};
212 $self->{comp_meth} = shift;
214 return $self->{comp_meth};
220 $self->{extension_data} = shift;
222 return $self->{extension_data};
226 my ($self, $ext_type, $ext_data) = @_;
227 $self->{extension_data}{$ext_type} = $ext_data;
231 my ($self, $ext_type) = @_;
232 delete $self->{extension_data}{$ext_type};