util/perl/TLSProxy/CertificateVerify.pm

   1 # Copyright 2016-2024 The OpenSSL Project Authors. All Rights Reserved.
   2 #
   3 # Licensed under the Apache License 2.0 (the "License").  You may not use
   4 # this file except in compliance with the License.  You can obtain a copy
   5 # in the file LICENSE in the source distribution or at
   6 # https://www.openssl.org/source/license.html
   7
   8 use strict;
   9
  10 package TLSProxy::CertificateVerify;
  11
  12 use vars '@ISA';
  13 push @ISA, 'TLSProxy::Message';
  14
  15 sub new
  16 {
  17     my $class = shift;
  18     my ($isdtls,
  19         $server,
  20         $msgseq,
  21         $msgfrag,
  22         $msgfragoffs,
  23         $data,
  24         $records,
  25         $startoffset,
  26         $message_frag_lens) = @_;
  27
  28     my $self = $class->SUPER::new(
  29         $isdtls,
  30         $server,
  31         TLSProxy::Message::MT_CERTIFICATE_VERIFY,
  32         $msgseq,
  33         $msgfrag,
  34         $msgfragoffs,
  35         $data,
  36         $records,
  37         $startoffset,
  38         $message_frag_lens);
  39
  40     $self->{sigalg} = -1;
  41     $self->{signature} = "";
  42
  43     return $self;
  44 }
  45
  46 sub parse
  47 {
  48     my $self = shift;
  49
  50     my $sigalg = -1;
  51     my $remdata = $self->data;
  52     my $record = ${$self->records}[0];
  53
  54     if (TLSProxy::Proxy->is_tls13()
  55             || $record->version() == TLSProxy::Record::VERS_TLS_1_2
  56             || $record->version() == TLSProxy::Record::VERS_DTLS_1_2) {
  57         $sigalg = unpack('n', $remdata);
  58         $remdata = substr($remdata, 2);
  59     }
  60
  61     my $siglen = unpack('n', substr($remdata, 0, 2));
  62     my $sig = substr($remdata, 2);
  63
  64     die "Invalid CertificateVerify signature length" if length($sig) != $siglen;
  65
  66     print "    SigAlg:".$sigalg."\n";
  67     print "    Signature Len:".$siglen."\n";
  68
  69     $self->sigalg($sigalg);
  70     $self->signature($sig);
  71 }
  72
  73 #Reconstruct the on-the-wire message data following changes
  74 sub set_message_contents
  75 {
  76     my $self = shift;
  77     my $data = "";
  78     my $sig = $self->signature();
  79     my $olddata = $self->data();
  80
  81     $data .= pack("n", $self->sigalg()) if ($self->sigalg() != -1);
  82     $data .= pack("n", length($sig));
  83     $data .= $sig;
  84
  85     $self->data($data);
  86 }
  87
  88 #Read/write accessors
  89 sub sigalg
  90 {
  91     my $self = shift;
  92     if (@_) {
  93       $self->{sigalg} = shift;
  94     }
  95     return $self->{sigalg};
  96 }
  97 sub signature
  98 {
  99     my $self = shift;
 100     if (@_) {
 101       $self->{signature} = shift;
 102     }
 103     return $self->{signature};
 104 }
 105 1;