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Extend TLSProxy capabilities

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Add ServerHello parsing to TLSProxy.
Also add some (very) limited ServerKeyExchange parsing.
Add the capability to set client and server cipher lists
Fix a bug with fragment lengths

Reviewed-by: Richard Levitte <levitte@openssl.org>
This commit is contained in:
Matt Caswell
2015-08-07 14:38:21 +01:00
parent 011467ee55
commit a1accbb1d7
4 changed files with 482 additions and 7 deletions
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176
util/TLSProxy/ServerKeyExchange.pm Normal file
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# Written by Matt Caswell for the OpenSSL project.
# ====================================================================
# Copyright (c) 1998-2015 The OpenSSL Project. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
#
# 3. All advertising materials mentioning features or use of this
# software must display the following acknowledgment:
# "This product includes software developed by the OpenSSL Project
# for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
#
# 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
# endorse or promote products derived from this software without
# prior written permission. For written permission, please contact
# openssl-core@openssl.org.
#
# 5. Products derived from this software may not be called "OpenSSL"
# nor may "OpenSSL" appear in their names without prior written
# permission of the OpenSSL Project.
#
# 6. Redistributions of any form whatsoever must retain the following
# acknowledgment:
# "This product includes software developed by the OpenSSL Project
# for use in the OpenSSL Toolkit (http://www.openssl.org/)"
#
# THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
# EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
# ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
# OF THE POSSIBILITY OF SUCH DAMAGE.
# ====================================================================
#
# This product includes cryptographic software written by Eric Young
# (eay@cryptsoft.com). This product includes software written by Tim
# Hudson (tjh@cryptsoft.com).
use strict;
package TLSProxy::ServerKeyExchange;
use parent 'TLSProxy::Message';
sub new
{
my $class = shift;
my ($server,
$data,
$records,
$startoffset,
$message_frag_lens) = @_;
my $self = $class->SUPER::new(
$server,
TLSProxy::Message::MT_SERVER_KEY_EXCHANGE,
$data,
$records,
$startoffset,
$message_frag_lens);
#DHE
$self->{p} = "";
$self->{g} = "";
$self->{pub_key} = "";
$self->{sig} = "";
return $self;
}
sub parse
{
my $self = shift;
#Minimal SKE parsing. Only supports DHE at the moment (if its not DHE
#the parsing data will be trash...which is ok as long as we don't try to
#use it)
my $p_len = unpack('n', $self->data);
my $ptr = 2;
my $p = substr($self->data, $ptr, $p_len);
$ptr += $p_len;
my $g_len = unpack('n', substr($self->data, $ptr));
$ptr += 2;
my $g = substr($self->data, $ptr, $g_len);
$ptr += $g_len;
my $pub_key_len = unpack('n', substr($self->data, $ptr));
$ptr += 2;
my $pub_key = substr($self->data, $ptr, $pub_key_len);
$ptr += $g_len;
#We assume its signed
my $sig_len = unpack('n', substr($self->data, $ptr));
$ptr += 2;
my $sig = substr($self->data, $ptr, $sig_len);
$ptr += $sig_len;
$self->p($p);
$self->g($g);
$self->pub_key($pub_key);
$self->sig($sig);
}
#Reconstruct the on-the-wire message data following changes
sub set_message_contents
{
my $self = shift;
my $data;
$data = pack('n', length($self->p));
$data .= $self->p;
$data .= pack('n', length($self->g));
$data .= $self->g;
$data .= pack('n', length($self->pub_key));
$data .= $self->pub_key;
if (length($self->sig) > 0) {
$data .= pack('n', length($self->sig));
$data .= $self->sig;
}
$self->data($data);
}
#Read/write accessors
#DHE
sub p
{
my $self = shift;
if (@_) {
$self->{p} = shift;
}
return $self->{p};
}
sub g
{
my $self = shift;
if (@_) {
$self->{g} = shift;
}
return $self->{g};
}
sub pub_key
{
my $self = shift;
if (@_) {
$self->{pub_key} = shift;
}
return $self->{pub_key};
}
sub sig
{
my $self = shift;
if (@_) {
$self->{sig} = shift;
}
return $self->{sig};
}
1;