# Copyright 2016-2019 The OpenSSL Project Authors. All Rights Reserved.

#

# Licensed under the Apache License 2.0 (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::CertificateRequest;

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_CERTIFICATE_REQUEST,

        $data,

        $records,

        $startoffset,

        $message_frag_lens);

    $self->{extension_data} = "";

    return $self;

}

sub parse

{

    my $self = shift;

    my $ptr = 1;

    if (TLSProxy::Proxy->is_tls13()) {

        my $request_ctx_len = unpack('C', $self->data);

        my $request_ctx = substr($self->data, $ptr, $request_ctx_len);

        $ptr += $request_ctx_len;

        my $extensions_len = unpack('n', substr($self->data, $ptr));

        $ptr += 2;

        my $extension_data = substr($self->data, $ptr);

        if (length($extension_data) != $extensions_len) {

            die "Invalid extension length\n";

        }

        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->extension_data(\%extensions);

        print "    Extensions Len:".$extensions_len."\n";

    }

    # else parse TLSv1.2 version - we don't support that at the moment

}

#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;

    }

    $data = pack('n', length($extensions));

    $data .= $extensions;

    $self->data($data);

}

#Read/write accessors

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;