diff options
Diffstat (limited to 'openssl-1.1.0h/util/perl/TLSProxy/Record.pm')
| -rw-r--r-- | openssl-1.1.0h/util/perl/TLSProxy/Record.pm | 339 |
1 files changed, 339 insertions, 0 deletions
diff --git a/openssl-1.1.0h/util/perl/TLSProxy/Record.pm b/openssl-1.1.0h/util/perl/TLSProxy/Record.pm new file mode 100644 index 0000000..786ba0c --- /dev/null +++ b/openssl-1.1.0h/util/perl/TLSProxy/Record.pm @@ -0,0 +1,339 @@ +# Copyright 2016-2018 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; + +use TLSProxy::Proxy; + +package TLSProxy::Record; + +my $server_ccs_seen = 0; +my $client_ccs_seen = 0; +my $etm = 0; + +use constant TLS_RECORD_HEADER_LENGTH => 5; + +#Record types +use constant { + RT_APPLICATION_DATA => 23, + RT_HANDSHAKE => 22, + RT_ALERT => 21, + RT_CCS => 20, + RT_UNKNOWN => 100 +}; + +my %record_type = ( + RT_APPLICATION_DATA, "APPLICATION DATA", + RT_HANDSHAKE, "HANDSHAKE", + RT_ALERT, "ALERT", + RT_CCS, "CCS", + RT_UNKNOWN, "UNKNOWN" +); + +use constant { + VERS_TLS_1_3 => 772, + VERS_TLS_1_2 => 771, + VERS_TLS_1_1 => 770, + VERS_TLS_1_0 => 769, + VERS_SSL_3_0 => 768, + VERS_SSL_LT_3_0 => 767 +}; + +my %tls_version = ( + VERS_TLS_1_3, "TLS1.3", + VERS_TLS_1_2, "TLS1.2", + VERS_TLS_1_1, "TLS1.1", + VERS_TLS_1_0, "TLS1.0", + VERS_SSL_3_0, "SSL3", + VERS_SSL_LT_3_0, "SSL<3" +); + +#Class method to extract records from a packet of data +sub get_records +{ + my $class = shift; + my $server = shift; + my $flight = shift; + my $packet = shift; + my $partial = ""; + my @record_list = (); + my @message_list = (); + my $data; + my $content_type; + my $version; + my $len; + my $len_real; + my $decrypt_len; + + my $recnum = 1; + while (length ($packet) > 0) { + print " Record $recnum"; + if ($server) { + print " (server -> client)\n"; + } else { + print " (client -> server)\n"; + } + #Get the record header + if (length($packet) < TLS_RECORD_HEADER_LENGTH + || length($packet) < 5 + unpack("n", substr($packet, 3, 2))) { + print "Partial data : ".length($packet)." bytes\n"; + $partial = $packet; + $packet = ""; + } else { + ($content_type, $version, $len) = unpack('CnnC*', $packet); + $data = substr($packet, 5, $len); + + print " Content type: ".$record_type{$content_type}."\n"; + print " Version: $tls_version{$version}\n"; + print " Length: $len"; + if ($len == length($data)) { + print "\n"; + $decrypt_len = $len_real = $len; + } else { + print " (expected), ".length($data)." (actual)\n"; + $decrypt_len = $len_real = length($data); + } + + my $record = TLSProxy::Record->new( + $flight, + $content_type, + $version, + $len, + 0, + $len_real, + $decrypt_len, + substr($packet, TLS_RECORD_HEADER_LENGTH, $len_real), + substr($packet, TLS_RECORD_HEADER_LENGTH, $len_real) + ); + + if (($server && $server_ccs_seen) + || (!$server && $client_ccs_seen)) { + if ($etm) { + $record->decryptETM(); + } else { + $record->decrypt(); + } + } + + push @record_list, $record; + + #Now figure out what messages are contained within this record + my @messages = TLSProxy::Message->get_messages($server, $record); + push @message_list, @messages; + + $packet = substr($packet, TLS_RECORD_HEADER_LENGTH + $len_real); + $recnum++; + } + } + + return (\@record_list, \@message_list, $partial); +} + +sub clear +{ + $server_ccs_seen = 0; + $client_ccs_seen = 0; +} + +#Class level accessors +sub server_ccs_seen +{ + my $class = shift; + if (@_) { + $server_ccs_seen = shift; + } + return $server_ccs_seen; +} +sub client_ccs_seen +{ + my $class = shift; + if (@_) { + $client_ccs_seen = shift; + } + return $client_ccs_seen; +} +#Enable/Disable Encrypt-then-MAC +sub etm +{ + my $class = shift; + if (@_) { + $etm = shift; + } + return $etm; +} + +sub new +{ + my $class = shift; + my ($flight, + $content_type, + $version, + $len, + $sslv2, + $len_real, + $decrypt_len, + $data, + $decrypt_data) = @_; + + my $self = { + flight => $flight, + content_type => $content_type, + version => $version, + len => $len, + sslv2 => $sslv2, + len_real => $len_real, + decrypt_len => $decrypt_len, + data => $data, + decrypt_data => $decrypt_data, + orig_decrypt_data => $decrypt_data, + sent => 0 + }; + + return bless $self, $class; +} + +#Decrypt using encrypt-then-MAC +sub decryptETM +{ + my ($self) = shift; + + my $data = $self->data; + + if($self->version >= VERS_TLS_1_1()) { + #TLS1.1+ has an explicit IV. Throw it away + $data = substr($data, 16); + } + + #Throw away the MAC (assumes MAC is 20 bytes for now. FIXME) + $data = substr($data, 0, length($data) - 20); + + #Find out what the padding byte is + my $padval = unpack("C", substr($data, length($data) - 1)); + + #Throw away the padding + $data = substr($data, 0, length($data) - ($padval + 1)); + + $self->decrypt_data($data); + $self->decrypt_len(length($data)); + + return $data; +} + +#Standard decrypt +sub decrypt() +{ + my ($self) = shift; + + my $data = $self->data; + + if($self->version >= VERS_TLS_1_1()) { + #TLS1.1+ has an explicit IV. Throw it away + $data = substr($data, 16); + } + + #Find out what the padding byte is + my $padval = unpack("C", substr($data, length($data) - 1)); + + #Throw away the padding + $data = substr($data, 0, length($data) - ($padval + 1)); + + #Throw away the MAC (assumes MAC is 20 bytes for now. FIXME) + $data = substr($data, 0, length($data) - 20); + + $self->decrypt_data($data); + $self->decrypt_len(length($data)); + + return $data; +} + +#Reconstruct the on-the-wire record representation +sub reconstruct_record +{ + my $self = shift; + my $data; + + if ($self->{sent}) { + return ""; + } + $self->{sent} = 1; + + if ($self->sslv2) { + $data = pack('n', $self->len | 0x8000); + } else { + $data = pack('Cnn', $self->content_type, $self->version, $self->len); + } + $data .= $self->data; + + return $data; +} + +#Read only accessors +sub flight +{ + my $self = shift; + return $self->{flight}; +} +sub content_type +{ + my $self = shift; + return $self->{content_type}; +} +sub version +{ + my $self = shift; + return $self->{version}; +} +sub sslv2 +{ + my $self = shift; + return $self->{sslv2}; +} +sub len_real +{ + my $self = shift; + return $self->{len_real}; +} +sub orig_decrypt_data +{ + my $self = shift; + return $self->{orig_decrypt_data}; +} + +#Read/write accessors +sub decrypt_len +{ + my $self = shift; + if (@_) { + $self->{decrypt_len} = shift; + } + return $self->{decrypt_len}; +} +sub data +{ + my $self = shift; + if (@_) { + $self->{data} = shift; + } + return $self->{data}; +} +sub decrypt_data +{ + my $self = shift; + if (@_) { + $self->{decrypt_data} = shift; + } + return $self->{decrypt_data}; +} +sub len +{ + my $self = shift; + if (@_) { + $self->{len} = shift; + } + return $self->{len}; +} +1; |