635 lines
18 KiB
Perl
635 lines
18 KiB
Perl
# Copyright 2016-2023 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_COMPRESSED_CERTIFICATE => 25,
|
|
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_COMPRESSED_CERTIFICATE, "CompressedCertificate",
|
|
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_CLIENT_CERT_TYPE => 19,
|
|
EXT_SERVER_CERT_TYPE => 20,
|
|
EXT_PADDING => 21,
|
|
EXT_ENCRYPT_THEN_MAC => 22,
|
|
EXT_EXTENDED_MASTER_SECRET => 23,
|
|
EXT_COMPRESS_CERTIFICATE => 27,
|
|
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;
|
|
}
|
|
1;
|