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 my $random = substr($self->data, $ptr, 32);
51 my $session_id_len = 0;
53 $session_id_len = unpack('C', substr($self->data, $ptr));
55 $session = substr($self->data, $ptr, $session_id_len);
56 $ptr += $session_id_len;
58 my $ciphersuite = unpack('n', substr($self->data, $ptr));
61 $comp_meth = unpack('C', substr($self->data, $ptr));
64 my $extensions_len = unpack('n', substr($self->data, $ptr));
65 if (!defined $extensions_len) {
70 #For now we just deal with this as a block of data. In the future we will
73 if ($extensions_len != 0) {
74 $extension_data = substr($self->data, $ptr);
76 if (length($extension_data) != $extensions_len) {
77 die "Invalid extension length\n";
80 if (length($self->data) != $ptr) {
81 die "Invalid extension length\n";
86 while (length($extension_data) >= 4) {
87 my ($type, $size) = unpack("nn", $extension_data);
88 my $extdata = substr($extension_data, 4, $size);
89 $extension_data = substr($extension_data, 4 + $size);
90 $extensions{$type} = $extdata;
91 if ($type == TLSProxy::Message::EXT_SUPPORTED_VERSIONS) {
92 $server_version = unpack('n', $extdata);
96 # TODO(TLS1.3): Replace this reference to draft version before release
97 if ($server_version == TLSProxy::Record::VERS_TLS_1_3_DRAFT) {
98 $server_version = TLSProxy::Record::VERS_TLS_1_3;
99 TLSProxy::Proxy->is_tls13(1);
102 $self->server_version($server_version);
103 $self->random($random);
104 $self->session_id_len($session_id_len);
105 $self->session($session);
106 $self->ciphersuite($ciphersuite);
107 TLSProxy::Proxy->ciphersuite($ciphersuite);
108 $self->comp_meth($comp_meth);
109 $self->extension_data(\%extensions);
111 $self->process_data();
113 if (TLSProxy::Proxy->is_tls13()) {
114 TLSProxy::Record->server_encrypting(1);
115 TLSProxy::Record->client_encrypting(1);
118 print " Server Version:".$server_version."\n";
119 print " Session ID Len:".$session_id_len."\n";
120 print " Ciphersuite:".$ciphersuite."\n";
121 print " Compression Method:".$comp_meth."\n";
122 print " Extensions Len:".$extensions_len."\n";
125 #Perform any actions necessary based on the data we've seen
130 TLSProxy::Message->ciphersuite($self->ciphersuite);
133 #Reconstruct the on-the-wire message data following changes
134 sub set_message_contents
140 $data = pack('n', $self->server_version);
141 $data .= $self->random;
142 $data .= pack('C', $self->session_id_len);
143 $data .= $self->session;
144 $data .= pack('n', $self->ciphersuite);
145 $data .= pack('C', $self->comp_meth);
147 foreach my $key (keys %{$self->extension_data}) {
148 my $extdata = ${$self->extension_data}{$key};
149 $extensions .= pack("n", $key);
150 $extensions .= pack("n", length($extdata));
151 $extensions .= $extdata;
152 if ($key == TLSProxy::Message::EXT_DUPLICATE_EXTENSION) {
153 $extensions .= pack("n", $key);
154 $extensions .= pack("n", length($extdata));
155 $extensions .= $extdata;
159 $data .= pack('n', length($extensions));
160 $data .= $extensions;
164 #Read/write accessors
169 $self->{server_version} = shift;
171 return $self->{server_version};
177 $self->{random} = shift;
179 return $self->{random};
185 $self->{session_id_len} = shift;
187 return $self->{session_id_len};
193 $self->{session} = shift;
195 return $self->{session};
201 $self->{ciphersuite} = shift;
203 return $self->{ciphersuite};
209 $self->{comp_meth} = shift;
211 return $self->{comp_meth};
217 $self->{extension_data} = shift;
219 return $self->{extension_data};
223 my ($self, $ext_type, $ext_data) = @_;
224 $self->{extension_data}{$ext_type} = $ext_data;
228 my ($self, $ext_type) = @_;
229 delete $self->{extension_data}{$ext_type};