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ssl_alths_unittest.cc
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ssl_alths_unittest.cc
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include <memory>
#include <vector>
#include "ssl.h"
#include "sslerr.h"
#include "sslproto.h"
#include "gtest_utils.h"
#include "tls_connect.h"
#include "tls_filter.h"
#include "tls_parser.h"
namespace nss_test {
static const uint32_t kServerHelloVersionAlt = SSL_LIBRARY_VERSION_TLS_1_2;
static const uint16_t kServerHelloVersionRegular =
0x7f00 | TLS_1_3_DRAFT_VERSION;
class AltHandshakeTest : public TlsConnectStreamTls13 {
protected:
void SetUp() {
TlsConnectStreamTls13::SetUp();
client_ccs_recorder_ =
std::make_shared<TlsRecordRecorder>(kTlsChangeCipherSpecType);
server_handshake_recorder_ =
std::make_shared<TlsRecordRecorder>(kTlsHandshakeType);
server_ccs_recorder_ =
std::make_shared<TlsRecordRecorder>(kTlsChangeCipherSpecType);
server_hello_recorder_ =
std::make_shared<TlsInspectorRecordHandshakeMessage>(
kTlsHandshakeServerHello);
}
void SetAltHandshakeTypeEnabled() {
client_->SetAltHandshakeTypeEnabled();
server_->SetAltHandshakeTypeEnabled();
}
void InstallFilters() {
client_->SetPacketFilter(client_ccs_recorder_);
auto chain = std::make_shared<ChainedPacketFilter>(ChainedPacketFilterInit(
{server_handshake_recorder_, server_ccs_recorder_,
server_hello_recorder_}));
server_->SetPacketFilter(chain);
}
void CheckServerHelloRecordVersion(uint16_t record_version) {
ASSERT_EQ(record_version,
server_handshake_recorder_->record(0).header.version());
}
void CheckServerHelloVersion(uint16_t server_hello_version) {
uint32_t ver;
ASSERT_TRUE(server_hello_recorder_->buffer().Read(0, 2, &ver));
ASSERT_EQ(server_hello_version, ver);
}
void CheckForRegularHandshake() {
EXPECT_EQ(0U, client_ccs_recorder_->count());
EXPECT_EQ(0U, server_ccs_recorder_->count());
CheckServerHelloVersion(kServerHelloVersionRegular);
CheckServerHelloRecordVersion(SSL_LIBRARY_VERSION_TLS_1_0);
}
void CheckForAltHandshake() {
EXPECT_EQ(1U, client_ccs_recorder_->count());
EXPECT_EQ(1U, server_ccs_recorder_->count());
CheckServerHelloVersion(kServerHelloVersionAlt);
CheckServerHelloRecordVersion(SSL_LIBRARY_VERSION_TLS_1_2);
}
std::shared_ptr<TlsRecordRecorder> client_ccs_recorder_;
std::shared_ptr<TlsRecordRecorder> server_handshake_recorder_;
std::shared_ptr<TlsRecordRecorder> server_ccs_recorder_;
std::shared_ptr<TlsInspectorRecordHandshakeMessage> server_hello_recorder_;
};
TEST_F(AltHandshakeTest, ClientOnly) {
client_->SetAltHandshakeTypeEnabled();
InstallFilters();
Connect();
CheckForRegularHandshake();
}
TEST_F(AltHandshakeTest, ServerOnly) {
server_->SetAltHandshakeTypeEnabled();
InstallFilters();
Connect();
CheckForRegularHandshake();
}
TEST_F(AltHandshakeTest, Enabled) {
SetAltHandshakeTypeEnabled();
InstallFilters();
Connect();
CheckForAltHandshake();
}
TEST_F(AltHandshakeTest, ZeroRtt) {
SetAltHandshakeTypeEnabled();
SetupForZeroRtt();
SetAltHandshakeTypeEnabled();
client_->Set0RttEnabled(true);
server_->Set0RttEnabled(true);
InstallFilters();
ExpectResumption(RESUME_TICKET);
ZeroRttSendReceive(true, true);
Handshake();
ExpectEarlyDataAccepted(true);
CheckConnected();
CheckForAltHandshake();
}
// Neither client nor server has the extension prior to resumption, so the
// client doesn't send a CCS before its 0-RTT data.
TEST_F(AltHandshakeTest, DisabledBeforeZeroRtt) {
SetupForZeroRtt();
SetAltHandshakeTypeEnabled();
client_->Set0RttEnabled(true);
server_->Set0RttEnabled(true);
InstallFilters();
ExpectResumption(RESUME_TICKET);
ZeroRttSendReceive(true, true);
Handshake();
ExpectEarlyDataAccepted(true);
CheckConnected();
EXPECT_EQ(0U, client_ccs_recorder_->count());
EXPECT_EQ(1U, server_ccs_recorder_->count());
CheckServerHelloVersion(kServerHelloVersionAlt);
}
// Both use the alternative in the initial handshake but only the server enables
// it on resumption.
TEST_F(AltHandshakeTest, ClientDisabledAfterZeroRtt) {
SetAltHandshakeTypeEnabled();
SetupForZeroRtt();
server_->SetAltHandshakeTypeEnabled();
client_->Set0RttEnabled(true);
server_->Set0RttEnabled(true);
InstallFilters();
ExpectResumption(RESUME_TICKET);
ZeroRttSendReceive(true, true);
Handshake();
ExpectEarlyDataAccepted(true);
CheckConnected();
CheckForRegularHandshake();
}
// If the alternative handshake isn't negotiated after 0-RTT, and the client has
// it enabled, it will send a ChangeCipherSpec. The server chokes on it if it
// hasn't negotiated the alternative handshake.
TEST_F(AltHandshakeTest, ServerDisabledAfterZeroRtt) {
SetAltHandshakeTypeEnabled();
SetupForZeroRtt();
client_->SetAltHandshakeTypeEnabled();
client_->Set0RttEnabled(true);
server_->Set0RttEnabled(true);
client_->Handshake(); // Send ClientHello (and CCS)
server_->Handshake(); // Consume the ClientHello, which is OK.
client_->ExpectResumption();
client_->Handshake(); // Read the server handshake.
EXPECT_EQ(TlsAgent::STATE_CONNECTED, client_->state());
// Now the server reads the CCS instead of more handshake messages.
ExpectAlert(server_, kTlsAlertBadRecordMac);
server_->Handshake();
EXPECT_EQ(TlsAgent::STATE_ERROR, server_->state());
client_->Handshake(); // Consume the alert.
EXPECT_EQ(TlsAgent::STATE_ERROR, client_->state());
}
} // nss_test