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CloverBootloader/Library/OpensslLib/openssl/util/perl/TLSProxy/Message.pm

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# Copyright 2016-2021 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::Message;
use TLSProxy::Alert;
use constant TLS_MESSAGE_HEADER_LENGTH => 4;
#Message types
use constant {
MT_HELLO_REQUEST => 0,
MT_CLIENT_HELLO => 1,
MT_SERVER_HELLO => 2,
MT_NEW_SESSION_TICKET => 4,
MT_ENCRYPTED_EXTENSIONS => 8,
MT_CERTIFICATE => 11,
MT_SERVER_KEY_EXCHANGE => 12,
MT_CERTIFICATE_REQUEST => 13,
MT_SERVER_HELLO_DONE => 14,
MT_CERTIFICATE_VERIFY => 15,
MT_CLIENT_KEY_EXCHANGE => 16,
MT_FINISHED => 20,
MT_CERTIFICATE_STATUS => 22,
MT_NEXT_PROTO => 67
};
#Alert levels
use constant {
AL_LEVEL_WARN => 1,
AL_LEVEL_FATAL => 2
};
#Alert descriptions
use constant {
AL_DESC_CLOSE_NOTIFY => 0,
AL_DESC_UNEXPECTED_MESSAGE => 10,
AL_DESC_ILLEGAL_PARAMETER => 47,
AL_DESC_NO_RENEGOTIATION => 100
};
my %message_type = (
MT_HELLO_REQUEST, "HelloRequest",
MT_CLIENT_HELLO, "ClientHello",
MT_SERVER_HELLO, "ServerHello",
MT_NEW_SESSION_TICKET, "NewSessionTicket",
MT_ENCRYPTED_EXTENSIONS, "EncryptedExtensions",
MT_CERTIFICATE, "Certificate",
MT_SERVER_KEY_EXCHANGE, "ServerKeyExchange",
MT_CERTIFICATE_REQUEST, "CertificateRequest",
MT_SERVER_HELLO_DONE, "ServerHelloDone",
MT_CERTIFICATE_VERIFY, "CertificateVerify",
MT_CLIENT_KEY_EXCHANGE, "ClientKeyExchange",
MT_FINISHED, "Finished",
MT_CERTIFICATE_STATUS, "CertificateStatus",
MT_NEXT_PROTO, "NextProto"
);
use constant {
EXT_SERVER_NAME => 0,
EXT_MAX_FRAGMENT_LENGTH => 1,
EXT_STATUS_REQUEST => 5,
EXT_SUPPORTED_GROUPS => 10,
EXT_EC_POINT_FORMATS => 11,
EXT_SRP => 12,
EXT_SIG_ALGS => 13,
EXT_USE_SRTP => 14,
EXT_ALPN => 16,
EXT_SCT => 18,
EXT_PADDING => 21,
EXT_ENCRYPT_THEN_MAC => 22,
EXT_EXTENDED_MASTER_SECRET => 23,
EXT_SESSION_TICKET => 35,
EXT_KEY_SHARE => 51,
EXT_PSK => 41,
EXT_SUPPORTED_VERSIONS => 43,
EXT_COOKIE => 44,
EXT_PSK_KEX_MODES => 45,
EXT_POST_HANDSHAKE_AUTH => 49,
EXT_SIG_ALGS_CERT => 50,
EXT_RENEGOTIATE => 65281,
EXT_NPN => 13172,
EXT_CRYPTOPRO_BUG_EXTENSION => 0xfde8,
EXT_UNKNOWN => 0xfffe,
#Unknown extension that should appear last
EXT_FORCE_LAST => 0xffff
};
# SignatureScheme of TLS 1.3 from:
# https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-signaturescheme
# We have to manually grab the SHA224 equivalents from the old registry
use constant {
SIG_ALG_RSA_PKCS1_SHA256 => 0x0401,
SIG_ALG_RSA_PKCS1_SHA384 => 0x0501,
SIG_ALG_RSA_PKCS1_SHA512 => 0x0601,
SIG_ALG_ECDSA_SECP256R1_SHA256 => 0x0403,
SIG_ALG_ECDSA_SECP384R1_SHA384 => 0x0503,
SIG_ALG_ECDSA_SECP521R1_SHA512 => 0x0603,
SIG_ALG_RSA_PSS_RSAE_SHA256 => 0x0804,
SIG_ALG_RSA_PSS_RSAE_SHA384 => 0x0805,
SIG_ALG_RSA_PSS_RSAE_SHA512 => 0x0806,
SIG_ALG_ED25519 => 0x0807,
SIG_ALG_ED448 => 0x0808,
SIG_ALG_RSA_PSS_PSS_SHA256 => 0x0809,
SIG_ALG_RSA_PSS_PSS_SHA384 => 0x080a,
SIG_ALG_RSA_PSS_PSS_SHA512 => 0x080b,
SIG_ALG_RSA_PKCS1_SHA1 => 0x0201,
SIG_ALG_ECDSA_SHA1 => 0x0203,
SIG_ALG_DSA_SHA1 => 0x0202,
SIG_ALG_DSA_SHA256 => 0x0402,
SIG_ALG_DSA_SHA384 => 0x0502,
SIG_ALG_DSA_SHA512 => 0x0602,
OSSL_SIG_ALG_RSA_PKCS1_SHA224 => 0x0301,
OSSL_SIG_ALG_DSA_SHA224 => 0x0302,
OSSL_SIG_ALG_ECDSA_SHA224 => 0x0303
};
use constant {
CIPHER_RSA_WITH_AES_128_CBC_SHA => 0x002f,
CIPHER_DHE_RSA_AES_128_SHA => 0x0033,
CIPHER_ADH_AES_128_SHA => 0x0034,
CIPHER_TLS13_AES_128_GCM_SHA256 => 0x1301,
CIPHER_TLS13_AES_256_GCM_SHA384 => 0x1302
};
use constant {
CLIENT => 0,
SERVER => 1
};
my $payload = "";
my $messlen = -1;
my $mt;
my $startoffset = -1;
my $server = 0;
my $success = 0;
my $end = 0;
my @message_rec_list = ();
my @message_frag_lens = ();
my $ciphersuite = 0;
my $successondata = 0;
my $alert;
sub clear
{
$payload = "";
$messlen = -1;
$startoffset = -1;
$server = 0;
$success = 0;
$end = 0;
$successondata = 0;
@message_rec_list = ();
@message_frag_lens = ();
$alert = undef;
}
#Class method to extract messages from a record
sub get_messages
{
my $class = shift;
my $serverin = shift;
my $record = shift;
my @messages = ();
my $message;
@message_frag_lens = ();
if ($serverin != $server && length($payload) != 0) {
die "Changed peer, but we still have fragment data\n";
}
$server = $serverin;
if ($record->content_type == TLSProxy::Record::RT_CCS) {
if ($payload ne "") {
#We can't handle this yet
die "CCS received before message data complete\n";
}
if (!TLSProxy::Proxy->is_tls13()) {
if ($server) {
TLSProxy::Record->server_encrypting(1);
} else {
TLSProxy::Record->client_encrypting(1);
}
}
} elsif ($record->content_type == TLSProxy::Record::RT_HANDSHAKE) {
if ($record->len == 0 || $record->len_real == 0) {
print " Message truncated\n";
} else {
my $recoffset = 0;
if (length $payload > 0) {
#We are continuing processing a message started in a previous
#record. Add this record to the list associated with this
#message
push @message_rec_list, $record;
if ($messlen <= length($payload)) {
#Shouldn't happen
die "Internal error: invalid messlen: ".$messlen
." payload length:".length($payload)."\n";
}
if (length($payload) + $record->decrypt_len >= $messlen) {
#We can complete the message with this record
$recoffset = $messlen - length($payload);
$payload .= substr($record->decrypt_data, 0, $recoffset);
push @message_frag_lens, $recoffset;
$message = create_message($server, $mt, $payload,
$startoffset);
push @messages, $message;
$payload = "";
} else {
#This is just part of the total message
$payload .= $record->decrypt_data;
$recoffset = $record->decrypt_len;
push @message_frag_lens, $record->decrypt_len;
}
print " Partial message data read: ".$recoffset." bytes\n";
}
while ($record->decrypt_len > $recoffset) {
#We are at the start of a new message
if ($record->decrypt_len - $recoffset < 4) {
#Whilst technically probably valid we can't cope with this
die "End of record in the middle of a message header\n";
}
@message_rec_list = ($record);
my $lenhi;
my $lenlo;
($mt, $lenhi, $lenlo) = unpack('CnC',
substr($record->decrypt_data,
$recoffset));
$messlen = ($lenhi << 8) | $lenlo;
print " Message type: $message_type{$mt}\n";
print " Message Length: $messlen\n";
$startoffset = $recoffset;
$recoffset += 4;
$payload = "";
if ($recoffset <= $record->decrypt_len) {
#Some payload data is present in this record
if ($record->decrypt_len - $recoffset >= $messlen) {
#We can complete the message with this record
$payload .= substr($record->decrypt_data, $recoffset,
$messlen);
$recoffset += $messlen;
push @message_frag_lens, $messlen;
$message = create_message($server, $mt, $payload,
$startoffset);
push @messages, $message;
$payload = "";
} else {
#This is just part of the total message
$payload .= substr($record->decrypt_data, $recoffset,
$record->decrypt_len - $recoffset);
$recoffset = $record->decrypt_len;
push @message_frag_lens, $recoffset;
}
}
}
}
} elsif ($record->content_type == TLSProxy::Record::RT_APPLICATION_DATA) {
print " [ENCRYPTED APPLICATION DATA]\n";
print " [".$record->decrypt_data."]\n";
if ($successondata) {
$success = 1;
$end = 1;
}
} elsif ($record->content_type == TLSProxy::Record::RT_ALERT) {
my ($alertlev, $alertdesc) = unpack('CC', $record->decrypt_data);
print " [$alertlev, $alertdesc]\n";
#A CloseNotify from the client indicates we have finished successfully
#(we assume)
if (!$end && !$server && $alertlev == AL_LEVEL_WARN
&& $alertdesc == AL_DESC_CLOSE_NOTIFY) {
$success = 1;
}
#Fatal or close notify alerts end the test
if ($alertlev == AL_LEVEL_FATAL || $alertdesc == AL_DESC_CLOSE_NOTIFY) {
$end = 1;
}
$alert = TLSProxy::Alert->new(
$server,
$record->encrypted,
$alertlev,
$alertdesc);
}
return @messages;
}
#Function to work out which sub-class we need to create and then
#construct it
sub create_message
{
my ($server, $mt, $data, $startoffset) = @_;
my $message;
#We only support ClientHello in this version...needs to be extended for
#others
if ($mt == MT_CLIENT_HELLO) {
$message = TLSProxy::ClientHello->new(
$server,
$data,
[@message_rec_list],
$startoffset,
[@message_frag_lens]
);
$message->parse();
} elsif ($mt == MT_SERVER_HELLO) {
$message = TLSProxy::ServerHello->new(
$server,
$data,
[@message_rec_list],
$startoffset,
[@message_frag_lens]
);
$message->parse();
} elsif ($mt == MT_ENCRYPTED_EXTENSIONS) {
$message = TLSProxy::EncryptedExtensions->new(
$server,
$data,
[@message_rec_list],
$startoffset,
[@message_frag_lens]
);
$message->parse();
} elsif ($mt == MT_CERTIFICATE) {
$message = TLSProxy::Certificate->new(
$server,
$data,
[@message_rec_list],
$startoffset,
[@message_frag_lens]
);
$message->parse();
} elsif ($mt == MT_CERTIFICATE_REQUEST) {
$message = TLSProxy::CertificateRequest->new(
$server,
$data,
[@message_rec_list],
$startoffset,
[@message_frag_lens]
);
$message->parse();
} elsif ($mt == MT_CERTIFICATE_VERIFY) {
$message = TLSProxy::CertificateVerify->new(
$server,
$data,
[@message_rec_list],
$startoffset,
[@message_frag_lens]
);
$message->parse();
} elsif ($mt == MT_SERVER_KEY_EXCHANGE) {
$message = TLSProxy::ServerKeyExchange->new(
$server,
$data,
[@message_rec_list],
$startoffset,
[@message_frag_lens]
);
$message->parse();
} elsif ($mt == MT_NEW_SESSION_TICKET) {
$message = TLSProxy::NewSessionTicket->new(
$server,
$data,
[@message_rec_list],
$startoffset,
[@message_frag_lens]
);
$message->parse();
} else {
#Unknown message type
$message = TLSProxy::Message->new(
$server,
$mt,
$data,
[@message_rec_list],
$startoffset,
[@message_frag_lens]
);
}
return $message;
}
sub end
{
my $class = shift;
return $end;
}
sub success
{
my $class = shift;
return $success;
}
sub fail
{
my $class = shift;
return !$success && $end;
}
sub alert
{
return $alert;
}
sub new
{
my $class = shift;
my ($server,
$mt,
$data,
$records,
$startoffset,
$message_frag_lens) = @_;
my $self = {
server => $server,
data => $data,
records => $records,
mt => $mt,
startoffset => $startoffset,
message_frag_lens => $message_frag_lens,
dupext => -1
};
return bless $self, $class;
}
sub ciphersuite
{
my $class = shift;
if (@_) {
$ciphersuite = shift;
}
return $ciphersuite;
}
#Update all the underlying records with the modified data from this message
#Note: Only supports TLSv1.3 and ETM encryption
sub repack
{
my $self = shift;
my $msgdata;
my $numrecs = $#{$self->records};
$self->set_message_contents();
my $lenhi;
my $lenlo;
$lenlo = length($self->data) & 0xff;
$lenhi = length($self->data) >> 8;
$msgdata = pack('CnC', $self->mt, $lenhi, $lenlo).$self->data;
if ($numrecs == 0) {
#The message is fully contained within one record
my ($rec) = @{$self->records};
my $recdata = $rec->decrypt_data;
my $old_length;
# We use empty message_frag_lens to indicates that pre-repacking,
# the message wasn't present. The first fragment length doesn't include
# the TLS header, so we need to check and compute the right length.
if (@{$self->message_frag_lens}) {
$old_length = ${$self->message_frag_lens}[0] +
TLS_MESSAGE_HEADER_LENGTH;
} else {
$old_length = 0;
}
my $prefix = substr($recdata, 0, $self->startoffset);
my $suffix = substr($recdata, $self->startoffset + $old_length);
$rec->decrypt_data($prefix.($msgdata).($suffix));
# TODO(openssl-team): don't keep explicit lengths.
# (If a length override is ever needed to construct invalid packets,
# use an explicit override field instead.)
$rec->decrypt_len(length($rec->decrypt_data));
# Only support re-encryption for TLSv1.3 and ETM.
if ($rec->encrypted()) {
if (TLSProxy::Proxy->is_tls13()) {
#Add content type (1 byte) and 16 tag bytes
$rec->data($rec->decrypt_data
.pack("C", TLSProxy::Record::RT_HANDSHAKE).("\0"x16));
} elsif ($rec->etm()) {
my $data = $rec->decrypt_data;
#Add padding
my $padval = length($data) % 16;
$padval = 15 - $padval;
for (0..$padval) {
$data .= pack("C", $padval);
}
#Add MAC. Assumed to be 20 bytes
foreach my $macval (0..19) {
$data .= pack("C", $macval);
}
if ($rec->version() >= TLSProxy::Record::VERS_TLS_1_1) {
#Explicit IV
$data = ("\0"x16).$data;
}
$rec->data($data);
} else {
die "Unsupported encryption: No ETM";
}
} else {
$rec->data($rec->decrypt_data);
}
$rec->len(length($rec->data));
#Update the fragment len in case we changed it above
${$self->message_frag_lens}[0] = length($msgdata)
- TLS_MESSAGE_HEADER_LENGTH;
return;
}
#Note we don't currently support changing a fragmented message length
my $recctr = 0;
my $datadone = 0;
foreach my $rec (@{$self->records}) {
my $recdata = $rec->decrypt_data;
if ($recctr == 0) {
#This is the first record
my $remainlen = length($recdata) - $self->startoffset;
$rec->data(substr($recdata, 0, $self->startoffset)
.substr(($msgdata), 0, $remainlen));
$datadone += $remainlen;
} elsif ($recctr + 1 == $numrecs) {
#This is the last record
$rec->data(substr($msgdata, $datadone));
} else {
#This is a middle record
$rec->data(substr($msgdata, $datadone, length($rec->data)));
$datadone += length($rec->data);
}
$recctr++;
}
}
#To be overridden by sub-classes
sub set_message_contents
{
}
#Read only accessors
sub server
{
my $self = shift;
return $self->{server};
}
#Read/write accessors
sub mt
{
my $self = shift;
if (@_) {
$self->{mt} = shift;
}
return $self->{mt};
}
sub data
{
my $self = shift;
if (@_) {
$self->{data} = shift;
}
return $self->{data};
}
sub records
{
my $self = shift;
if (@_) {
$self->{records} = shift;
}
return $self->{records};
}
sub startoffset
{
my $self = shift;
if (@_) {
$self->{startoffset} = shift;
}
return $self->{startoffset};
}
sub message_frag_lens
{
my $self = shift;
if (@_) {
$self->{message_frag_lens} = shift;
}
return $self->{message_frag_lens};
}
sub encoded_length
{
my $self = shift;
return TLS_MESSAGE_HEADER_LENGTH + length($self->data);
}
sub dupext
{
my $self = shift;
if (@_) {
$self->{dupext} = shift;
}
return $self->{dupext};
}
sub successondata
{
my $class = shift;
if (@_) {
$successondata = shift;
}
return $successondata;
}
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