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';
15 my $hrrrandom = pack("C*", 0xCF, 0x21, 0xAD, 0x74, 0xE5, 0x9A, 0x61, 0x11, 0xBE,
16 0x1D, 0x8C, 0x02, 0x1E, 0x65, 0xB8, 0x91, 0xC2, 0xA2,
17 0x11, 0x16, 0x7A, 0xBB, 0x8C, 0x5E, 0x07, 0x9E, 0x09,
18 0xE2, 0xC8, 0xA8, 0x33, 0x9C);
27 $message_frag_lens) = @_;
29 my $self = $class->SUPER::new(
31 TLSProxy::Message::MT_SERVER_HELLO,
37 $self->{server_version} = 0;
39 $self->{session_id_len} = 0;
40 $self->{session} = "";
41 $self->{ciphersuite} = 0;
42 $self->{comp_meth} = 0;
43 $self->{extension_data} = "";
52 my ($server_version) = unpack('n', $self->data);
53 my $neg_version = $server_version;
55 my $random = substr($self->data, $ptr, 32);
57 my $session_id_len = 0;
59 $session_id_len = unpack('C', substr($self->data, $ptr));
61 $session = substr($self->data, $ptr, $session_id_len);
62 $ptr += $session_id_len;
64 my $ciphersuite = unpack('n', substr($self->data, $ptr));
67 $comp_meth = unpack('C', substr($self->data, $ptr));
70 my $extensions_len = unpack('n', substr($self->data, $ptr));
71 if (!defined $extensions_len) {
76 #For now we just deal with this as a block of data. In the future we will
79 if ($extensions_len != 0) {
80 $extension_data = substr($self->data, $ptr);
82 if (length($extension_data) != $extensions_len) {
83 die "Invalid extension length\n";
86 if (length($self->data) != $ptr) {
87 die "Invalid extension length\n";
92 while (length($extension_data) >= 4) {
93 my ($type, $size) = unpack("nn", $extension_data);
94 my $extdata = substr($extension_data, 4, $size);
95 $extension_data = substr($extension_data, 4 + $size);
96 $extensions{$type} = $extdata;
97 if ($type == TLSProxy::Message::EXT_SUPPORTED_VERSIONS) {
98 $neg_version = unpack('n', $extdata);
102 if ($random eq $hrrrandom) {
103 TLSProxy::Proxy->is_tls13(1);
104 # TODO(TLS1.3): Replace this reference to draft version before release
105 } elsif ($neg_version == TLSProxy::Record::VERS_TLS_1_3_DRAFT) {
106 $neg_version = TLSProxy::Record::VERS_TLS_1_3;
107 TLSProxy::Proxy->is_tls13(1);
109 TLSProxy::Record->server_encrypting(1);
110 TLSProxy::Record->client_encrypting(1);
113 $self->server_version($server_version);
114 $self->random($random);
115 $self->session_id_len($session_id_len);
116 $self->session($session);
117 $self->ciphersuite($ciphersuite);
118 TLSProxy::Proxy->ciphersuite($ciphersuite);
119 $self->comp_meth($comp_meth);
120 $self->extension_data(\%extensions);
122 $self->process_data();
125 print " Server Version:".$server_version."\n";
126 print " Session ID Len:".$session_id_len."\n";
127 print " Ciphersuite:".$ciphersuite."\n";
128 print " Compression Method:".$comp_meth."\n";
129 print " Extensions Len:".$extensions_len."\n";
132 #Perform any actions necessary based on the data we've seen
137 TLSProxy::Message->ciphersuite($self->ciphersuite);
140 #Reconstruct the on-the-wire message data following changes
141 sub set_message_contents
147 $data = pack('n', $self->server_version);
148 $data .= $self->random;
149 $data .= pack('C', $self->session_id_len);
150 $data .= $self->session;
151 $data .= pack('n', $self->ciphersuite);
152 $data .= pack('C', $self->comp_meth);
154 foreach my $key (keys %{$self->extension_data}) {
155 my $extdata = ${$self->extension_data}{$key};
156 $extensions .= pack("n", $key);
157 $extensions .= pack("n", length($extdata));
158 $extensions .= $extdata;
159 if ($key == TLSProxy::Message::EXT_DUPLICATE_EXTENSION) {
160 $extensions .= pack("n", $key);
161 $extensions .= pack("n", length($extdata));
162 $extensions .= $extdata;
166 $data .= pack('n', length($extensions));
167 $data .= $extensions;
171 #Read/write accessors
176 $self->{server_version} = shift;
178 return $self->{server_version};
184 $self->{random} = shift;
186 return $self->{random};
192 $self->{session_id_len} = shift;
194 return $self->{session_id_len};
200 $self->{session} = shift;
202 return $self->{session};
208 $self->{ciphersuite} = shift;
210 return $self->{ciphersuite};
216 $self->{comp_meth} = shift;
218 return $self->{comp_meth};
224 $self->{extension_data} = shift;
226 return $self->{extension_data};
230 my ($self, $ext_type, $ext_data) = @_;
231 $self->{extension_data}{$ext_type} = $ext_data;
235 my ($self, $ext_type) = @_;
236 delete $self->{extension_data}{$ext_type};