1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
|
# Copyright 2016-2024 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::EncryptedExtensions;
use vars '@ISA';
push @ISA, 'TLSProxy::Message';
sub new
{
my $class = shift;
my ($isdtls,
$server,
$msgseq,
$msgfrag,
$msgfragoffs,
$data,
$records,
$startoffset,
$message_frag_lens) = @_;
my $self = $class->SUPER::new(
$isdtls,
$server,
TLSProxy::Message::MT_ENCRYPTED_EXTENSIONS,
$msgseq,
$msgfrag,
$msgfragoffs,
$data,
$records,
$startoffset,
$message_frag_lens);
$self->{extension_data} = "";
return $self;
}
sub parse
{
my $self = shift;
my $extensions_len = unpack('n', $self->data);
if (!defined $extensions_len) {
$extensions_len = 0;
}
my $extension_data;
if ($extensions_len != 0) {
$extension_data = substr($self->data, 2);
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;
}
$self->extension_data(\%extensions);
print " Extensions Len:".$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;
}
$data = pack('n', length($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;
|
