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);
48 my $random = substr($self->data, $ptr, 32);
50 my $session_id_len = unpack('C', substr($self->data, $ptr));
52 my $session = substr($self->data, $ptr, $session_id_len);
53 $ptr += $session_id_len;
54 my $ciphersuite = unpack('n', substr($self->data, $ptr));
56 my $comp_meth = unpack('C', substr($self->data, $ptr));
58 my $extensions_len = unpack('n', substr($self->data, $ptr));
59 if (!defined $extensions_len) {
64 #For now we just deal with this as a block of data. In the future we will
67 if ($extensions_len != 0) {
68 $extension_data = substr($self->data, $ptr);
70 if (length($extension_data) != $extensions_len) {
71 die "Invalid extension length\n";
74 if (length($self->data) != $ptr) {
75 die "Invalid extension length\n";
80 while (length($extension_data) >= 4) {
81 my ($type, $size) = unpack("nn", $extension_data);
82 my $extdata = substr($extension_data, 4, $size);
83 $extension_data = substr($extension_data, 4 + $size);
84 $extensions{$type} = $extdata;
87 $self->server_version($server_version);
88 $self->random($random);
89 $self->session_id_len($session_id_len);
90 $self->session($session);
91 $self->ciphersuite($ciphersuite);
92 $self->comp_meth($comp_meth);
93 $self->extension_data(\%extensions);
95 $self->process_data();
97 # TODO(TLS1.3): Replace this reference to draft version before release
98 if ($server_version == TLSProxy::Record::VERS_TLS_1_3_DRAFT) {
99 TLSProxy::Record->server_encrypting(1);
100 TLSProxy::Record->client_encrypting(1);
101 TLSProxy::Proxy->is_tls13(1);
104 print " Server Version:".$server_version."\n";
105 print " Session ID Len:".$session_id_len."\n";
106 print " Ciphersuite:".$ciphersuite."\n";
107 print " Compression Method:".$comp_meth."\n";
108 print " Extensions Len:".$extensions_len."\n";
111 #Perform any actions necessary based on the data we've seen
116 TLSProxy::Message->ciphersuite($self->ciphersuite);
119 #Reconstruct the on-the-wire message data following changes
120 sub set_message_contents
126 $data = pack('n', $self->server_version);
127 $data .= $self->random;
128 $data .= pack('C', $self->session_id_len);
129 $data .= $self->session;
130 $data .= pack('n', $self->ciphersuite);
131 $data .= pack('C', $self->comp_meth);
133 foreach my $key (keys %{$self->extension_data}) {
134 my $extdata = ${$self->extension_data}{$key};
135 $extensions .= pack("n", $key);
136 $extensions .= pack("n", length($extdata));
137 $extensions .= $extdata;
138 if ($key == TLSProxy::Message::EXT_DUPLICATE_EXTENSION) {
139 $extensions .= pack("n", $key);
140 $extensions .= pack("n", length($extdata));
141 $extensions .= $extdata;
145 $data .= pack('n', length($extensions));
146 $data .= $extensions;
150 #Read/write accessors
155 $self->{client_version} = shift;
157 return $self->{client_version};
163 $self->{random} = shift;
165 return $self->{random};
171 $self->{session_id_len} = shift;
173 return $self->{session_id_len};
179 $self->{session} = shift;
181 return $self->{session};
187 $self->{ciphersuite} = shift;
189 return $self->{ciphersuite};
195 $self->{comp_meth} = shift;
197 return $self->{comp_meth};
203 $self->{extension_data} = shift;
205 return $self->{extension_data};
209 my ($self, $ext_type, $ext_data) = @_;
210 $self->{extension_data}{$ext_type} = $ext_data;
214 my ($self, $ext_type) = @_;
215 delete $self->{extension_data}{$ext_type};