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# Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
#
# Licensed under the OpenSSL license (the "License"). You may not use
# this file except in compliance with the License. You can obtain a copy
# in the file LICENSE in the source distribution or at
# https://www.openssl.org/source/license.html
use strict;
package TLSProxy::HelloRetryRequest;
use vars '@ISA';
push @ISA, 'TLSProxy::Message';
sub new
{
my $class = shift;
my ($server,
$data,
$records,
$startoffset,
$message_frag_lens) = @_;
my $self = $class->SUPER::new(
$server,
TLSProxy::Message::MT_HELLO_RETRY_REQUEST,
$data,
$records,
$startoffset,
$message_frag_lens);
$self->{extension_data} = "";
return $self;
}
sub parse
{
my $self = shift;
my $ptr = 2;
TLSProxy::Proxy->is_tls13(1);
my ($server_version) = unpack('n', $self->data);
# TODO(TLS1.3): Replace this reference to draft version before release
if ($server_version == TLSProxy::Record::VERS_TLS_1_3_DRAFT) {
$server_version = TLSProxy::Record::VERS_TLS_1_3;
}
my $extensions_len = unpack('n', substr($self->data, $ptr));
if (!defined $extensions_len) {
$extensions_len = 0;
}
$ptr += 2;
my $extension_data;
if ($extensions_len != 0) {
$extension_data = substr($self->data, $ptr);
if (length($extension_data) != $extensions_len) {
die "Invalid extension length\n";
}
} else {
if (length($self->data) != 2) {
die "Invalid extension length\n";
}
$extension_data = "";
}
my %extensions = ();
while (length($extension_data) >= 4) {
my ($type, $size) = unpack("nn", $extension_data);
my $extdata = substr($extension_data, 4, $size);
$extension_data = substr($extension_data, 4 + $size);
$extensions{$type} = $extdata;
}
$self->server_version($server_version);
$self->extension_data(\%extensions);
print " Extensions Len:".$extensions_len."\n";
}
#Reconstruct the on-the-wire message data following changes
sub set_message_contents
{
my $self = shift;
my $data;
my $extensions = "";
foreach my $key (keys %{$self->extension_data}) {
my $extdata = ${$self->extension_data}{$key};
$extensions .= pack("n", $key);
$extensions .= pack("n", length($extdata));
$extensions .= $extdata;
if ($key == TLSProxy::Message::EXT_DUPLICATE_EXTENSION) {
$extensions .= pack("n", $key);
$extensions .= pack("n", length($extdata));
$extensions .= $extdata;
}
}
$data = pack('n', $self->server_version);
$data .= pack('n', length($extensions));
$data .= $extensions;
$self->data($data);
}
#Read/write accessors
sub server_version
{
my $self = shift;
if (@_) {
$self->{server_version} = shift;
}
return $self->{server_version};
}
sub extension_data
{
my $self = shift;
if (@_) {
$self->{extension_data} = shift;
}
return $self->{extension_data};
}
sub set_extension
{
my ($self, $ext_type, $ext_data) = @_;
$self->{extension_data}{$ext_type} = $ext_data;
}
sub delete_extension
{
my ($self, $ext_type) = @_;
delete $self->{extension_data}{$ext_type};
}
1;
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