233 lines
6.7 KiB
Perl
233 lines
6.7 KiB
Perl
# Written by Matt Caswell for the OpenSSL project.
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# ====================================================================
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# Copyright (c) 1998-2015 The OpenSSL Project. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in
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# the documentation and/or other materials provided with the
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# distribution.
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#
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# 3. All advertising materials mentioning features or use of this
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# software must display the following acknowledgment:
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# "This product includes software developed by the OpenSSL Project
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# for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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#
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# 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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# endorse or promote products derived from this software without
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# prior written permission. For written permission, please contact
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# openssl-core@openssl.org.
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#
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# 5. Products derived from this software may not be called "OpenSSL"
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# nor may "OpenSSL" appear in their names without prior written
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# permission of the OpenSSL Project.
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#
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# 6. Redistributions of any form whatsoever must retain the following
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# acknowledgment:
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# "This product includes software developed by the OpenSSL Project
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# for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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#
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# THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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# EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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# ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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# OF THE POSSIBILITY OF SUCH DAMAGE.
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# ====================================================================
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#
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# This product includes cryptographic software written by Eric Young
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# (eay@cryptsoft.com). This product includes software written by Tim
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# Hudson (tjh@cryptsoft.com).
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use strict;
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package TLSProxy::ServerHello;
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use parent 'TLSProxy::Message';
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sub new
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{
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my $class = shift;
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my ($server,
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$data,
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$records,
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$startoffset,
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$message_frag_lens) = @_;
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my $self = $class->SUPER::new(
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$server,
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TLSProxy::Message::MT_SERVER_HELLO,
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$data,
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$records,
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$startoffset,
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$message_frag_lens);
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$self->{server_version} = 0;
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$self->{random} = [];
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$self->{session_id_len} = 0;
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$self->{session} = "";
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$self->{ciphersuite} = 0;
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$self->{comp_meth} = 0;
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$self->{extensions_data} = "";
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return $self;
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}
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sub parse
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{
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my $self = shift;
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my $ptr = 2;
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my ($server_version) = unpack('n', $self->data);
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my $random = substr($self->data, $ptr, 32);
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$ptr += 32;
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my $session_id_len = unpack('C', substr($self->data, $ptr));
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$ptr++;
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my $session = substr($self->data, $ptr, $session_id_len);
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$ptr += $session_id_len;
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my $ciphersuite = unpack('n', substr($self->data, $ptr));
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$ptr += 2;
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my $comp_meth = unpack('C', substr($self->data, $ptr));
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$ptr++;
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my $extensions_len = unpack('n', substr($self->data, $ptr));
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$ptr += 2;
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#For now we just deal with this as a block of data. In the future we will
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#want to parse this
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my $extension_data = substr($self->data, $ptr);
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if (length($extension_data) != $extensions_len) {
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die "Invalid extension length\n";
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}
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my %extensions = ();
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while (length($extension_data) >= 4) {
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my ($type, $size) = unpack("nn", $extension_data);
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my $extdata = substr($extension_data, 4, $size);
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$extension_data = substr($extension_data, 4 + $size);
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$extensions{$type} = $extdata;
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}
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$self->server_version($server_version);
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$self->random($random);
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$self->session_id_len($session_id_len);
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$self->session($session);
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$self->ciphersuite($ciphersuite);
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$self->comp_meth($comp_meth);
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$self->extension_data(\%extensions);
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$self->process_data();
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print " Server Version:".$server_version."\n";
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print " Session ID Len:".$session_id_len."\n";
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print " Ciphersuite:".$ciphersuite."\n";
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print " Compression Method:".$comp_meth."\n";
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print " Extensions Len:".$extensions_len."\n";
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}
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#Perform any actions necessary based on the data we've seen
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sub process_data
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{
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my $self = shift;
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TLSProxy::Message->ciphersuite($self->ciphersuite);
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}
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#Reconstruct the on-the-wire message data following changes
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sub set_message_contents
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{
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my $self = shift;
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my $data;
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my $extensions = "";
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$data = pack('n', $self->server_version);
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$data .= $self->random;
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$data .= pack('C', $self->session_id_len);
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$data .= $self->session;
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$data .= pack('n', $self->ciphersuite);
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$data .= pack('C', $self->comp_meth);
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foreach my $key (keys %{$self->extension_data}) {
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my $extdata = ${$self->extension_data}{$key};
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$extensions .= pack("n", $key);
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$extensions .= pack("n", length($extdata));
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$extensions .= $extdata;
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}
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$data .= pack('n', length($extensions));
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$data .= $extensions;
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$self->data($data);
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}
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#Read/write accessors
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sub server_version
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{
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my $self = shift;
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if (@_) {
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$self->{client_version} = shift;
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}
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return $self->{client_version};
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}
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sub random
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{
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my $self = shift;
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if (@_) {
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$self->{random} = shift;
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}
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return $self->{random};
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}
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sub session_id_len
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{
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my $self = shift;
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if (@_) {
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$self->{session_id_len} = shift;
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}
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return $self->{session_id_len};
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}
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sub session
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{
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my $self = shift;
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if (@_) {
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$self->{session} = shift;
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}
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return $self->{session};
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}
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sub ciphersuite
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{
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my $self = shift;
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if (@_) {
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$self->{ciphersuite} = shift;
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}
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return $self->{ciphersuite};
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}
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sub comp_meth
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{
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my $self = shift;
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if (@_) {
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$self->{comp_meth} = shift;
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}
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return $self->{comp_meth};
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}
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sub extension_data
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{
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my $self = shift;
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if (@_) {
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$self->{extension_data} = shift;
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}
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return $self->{extension_data};
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}
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sub set_extension
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{
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my ($self, $ext_type, $ext_data) = @_;
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$self->{extension_data}{$ext_type} = $ext_data;
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}
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1;
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