1 # Written by Matt Caswell for the OpenSSL project.
2 # ====================================================================
3 # Copyright (c) 1998-2015 The OpenSSL Project. All rights reserved.
5 # Redistribution and use in source and binary forms, with or without
6 # modification, are permitted provided that the following conditions
9 # 1. Redistributions of source code must retain the above copyright
10 # notice, this list of conditions and the following disclaimer.
12 # 2. Redistributions in binary form must reproduce the above copyright
13 # notice, this list of conditions and the following disclaimer in
14 # the documentation and/or other materials provided with the
17 # 3. All advertising materials mentioning features or use of this
18 # software must display the following acknowledgment:
19 # "This product includes software developed by the OpenSSL Project
20 # for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
22 # 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
23 # endorse or promote products derived from this software without
24 # prior written permission. For written permission, please contact
25 # openssl-core@openssl.org.
27 # 5. Products derived from this software may not be called "OpenSSL"
28 # nor may "OpenSSL" appear in their names without prior written
29 # permission of the OpenSSL Project.
31 # 6. Redistributions of any form whatsoever must retain the following
33 # "This product includes software developed by the OpenSSL Project
34 # for use in the OpenSSL Toolkit (http://www.openssl.org/)"
36 # THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
37 # EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
38 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
39 # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
40 # ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
42 # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
43 # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
44 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
45 # STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
46 # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
47 # OF THE POSSIBILITY OF SUCH DAMAGE.
48 # ====================================================================
50 # This product includes cryptographic software written by Eric Young
51 # (eay@cryptsoft.com). This product includes software written by Tim
52 # Hudson (tjh@cryptsoft.com).
56 package TLSProxy::ClientHello;
59 push @ISA, 'TLSProxy::Message';
68 $message_frag_lens) = @_;
70 my $self = $class->SUPER::new(
78 $self->{client_version} = 0;
80 $self->{session_id_len} = 0;
81 $self->{session} = "";
82 $self->{ciphersuite_len} = 0;
83 $self->{ciphersuites} = [];
84 $self->{comp_meth_len} = 0;
85 $self->{comp_meths} = [];
86 $self->{extensions_len} = 0;
87 $self->{extension_data} = "";
96 my ($client_version) = unpack('n', $self->data);
97 my $random = substr($self->data, $ptr, 32);
99 my $session_id_len = unpack('C', substr($self->data, $ptr));
101 my $session = substr($self->data, $ptr, $session_id_len);
102 $ptr += $session_id_len;
103 my $ciphersuite_len = unpack('n', substr($self->data, $ptr));
105 my @ciphersuites = unpack('n*', substr($self->data, $ptr,
107 $ptr += $ciphersuite_len;
108 my $comp_meth_len = unpack('C', substr($self->data, $ptr));
110 my @comp_meths = unpack('C*', substr($self->data, $ptr, $comp_meth_len));
111 $ptr += $comp_meth_len;
112 my $extensions_len = unpack('n', substr($self->data, $ptr));
114 #For now we just deal with this as a block of data. In the future we will
116 my $extension_data = substr($self->data, $ptr);
118 if (length($extension_data) != $extensions_len) {
119 die "Invalid extension length\n";
122 while (length($extension_data) >= 4) {
123 my ($type, $size) = unpack("nn", $extension_data);
124 my $extdata = substr($extension_data, 4, $size);
125 $extension_data = substr($extension_data, 4 + $size);
126 $extensions{$type} = $extdata;
129 $self->client_version($client_version);
130 $self->random($random);
131 $self->session_id_len($session_id_len);
132 $self->session($session);
133 $self->ciphersuite_len($ciphersuite_len);
134 $self->ciphersuites(\@ciphersuites);
135 $self->comp_meth_len($comp_meth_len);
136 $self->comp_meths(\@comp_meths);
137 $self->extensions_len($extensions_len);
138 $self->extension_data(\%extensions);
140 $self->process_extensions();
142 print " Client Version:".$client_version."\n";
143 print " Session ID Len:".$session_id_len."\n";
144 print " Ciphersuite len:".$ciphersuite_len."\n";
145 print " Compression Method Len:".$comp_meth_len."\n";
146 print " Extensions Len:".$extensions_len."\n";
149 #Perform any actions necessary based on the extensions we've seen
150 sub process_extensions
153 my %extensions = %{$self->extension_data};
155 #Clear any state from a previous run
156 TLSProxy::Record->etm(0);
158 if (exists $extensions{TLSProxy::Message::EXT_ENCRYPT_THEN_MAC}) {
159 TLSProxy::Record->etm(1);
163 #Reconstruct the on-the-wire message data following changes
164 sub set_message_contents
170 $data = pack('n', $self->client_version);
171 $data .= $self->random;
172 $data .= pack('C', $self->session_id_len);
173 $data .= $self->session;
174 $data .= pack('n', $self->ciphersuite_len);
175 $data .= pack("n*", @{$self->ciphersuites});
176 $data .= pack('C', $self->comp_meth_len);
177 $data .= pack("C*", @{$self->comp_meths});
179 foreach my $key (keys %{$self->extension_data}) {
180 my $extdata = ${$self->extension_data}{$key};
181 $extensions .= pack("n", $key);
182 $extensions .= pack("n", length($extdata));
183 $extensions .= $extdata;
184 if ($key == TLSProxy::Message::EXT_DUPLICATE_EXTENSION) {
185 $extensions .= pack("n", $key);
186 $extensions .= pack("n", length($extdata));
187 $extensions .= $extdata;
191 $data .= pack('n', length($extensions));
192 $data .= $extensions;
197 #Read/write accessors
202 $self->{client_version} = shift;
204 return $self->{client_version};
210 $self->{random} = shift;
212 return $self->{random};
218 $self->{session_id_len} = shift;
220 return $self->{session_id_len};
226 $self->{session} = shift;
228 return $self->{session};
234 $self->{ciphersuite_len} = shift;
236 return $self->{ciphersuite_len};
242 $self->{ciphersuites} = shift;
244 return $self->{ciphersuites};
250 $self->{comp_meth_len} = shift;
252 return $self->{comp_meth_len};
258 $self->{comp_meths} = shift;
260 return $self->{comp_meths};
266 $self->{extensions_len} = shift;
268 return $self->{extensions_len};
274 $self->{extension_data} = shift;
276 return $self->{extension_data};
280 my ($self, $ext_type, $ext_data) = @_;
281 $self->{extension_data}{$ext_type} = $ext_data;
285 my ($self, $ext_type) = @_;
286 delete $self->{extension_data}{$ext_type};