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// Copyright (c) 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/third_party/quiche/src/quic/core/chlo_extractor.h"
#include <memory>
#include <string>
#include <utility>
#include "absl/base/macros.h"
#include "absl/strings/string_view.h"
#include "net/third_party/quiche/src/quic/core/quic_framer.h"
#include "net/third_party/quiche/src/quic/core/quic_utils.h"
#include "net/third_party/quiche/src/quic/platform/api/quic_test.h"
#include "net/third_party/quiche/src/quic/test_tools/crypto_test_utils.h"
#include "net/third_party/quiche/src/quic/test_tools/first_flight.h"
#include "net/third_party/quiche/src/quic/test_tools/quic_test_utils.h"
namespace quic {
namespace test {
namespace {
class TestDelegate : public ChloExtractor::Delegate {
public:
TestDelegate() = default;
~TestDelegate() override = default;
// ChloExtractor::Delegate implementation
void OnChlo(QuicTransportVersion version,
QuicConnectionId connection_id,
const CryptoHandshakeMessage& chlo) override {
version_ = version;
connection_id_ = connection_id;
chlo_ = chlo.DebugString();
absl::string_view alpn_value;
if (chlo.GetStringPiece(kALPN, &alpn_value)) {
alpn_ = std::string(alpn_value);
}
}
QuicConnectionId connection_id() const { return connection_id_; }
QuicTransportVersion transport_version() const { return version_; }
const std::string& chlo() const { return chlo_; }
const std::string& alpn() const { return alpn_; }
private:
QuicConnectionId connection_id_;
QuicTransportVersion version_;
std::string chlo_;
std::string alpn_;
};
class ChloExtractorTest : public QuicTestWithParam<ParsedQuicVersion> {
public:
ChloExtractorTest() : version_(GetParam()) {}
void MakePacket(absl::string_view data,
bool munge_offset,
bool munge_stream_id) {
QuicPacketHeader header;
header.destination_connection_id = TestConnectionId();
header.destination_connection_id_included = CONNECTION_ID_PRESENT;
header.version_flag = true;
header.version = version_;
header.reset_flag = false;
header.packet_number_length = PACKET_4BYTE_PACKET_NUMBER;
header.packet_number = QuicPacketNumber(1);
if (version_.HasLongHeaderLengths()) {
header.retry_token_length_length = VARIABLE_LENGTH_INTEGER_LENGTH_1;
header.length_length = VARIABLE_LENGTH_INTEGER_LENGTH_2;
}
QuicFrames frames;
size_t offset = 0;
if (munge_offset) {
offset++;
}
QuicFramer framer(SupportedVersions(version_), QuicTime::Zero(),
Perspective::IS_CLIENT, kQuicDefaultConnectionIdLength);
framer.SetInitialObfuscators(TestConnectionId());
if (!version_.UsesCryptoFrames() || munge_stream_id) {
QuicStreamId stream_id =
QuicUtils::GetCryptoStreamId(version_.transport_version);
if (munge_stream_id) {
stream_id++;
}
frames.push_back(
QuicFrame(QuicStreamFrame(stream_id, false, offset, data)));
} else {
frames.push_back(
QuicFrame(new QuicCryptoFrame(ENCRYPTION_INITIAL, offset, data)));
}
std::unique_ptr<QuicPacket> packet(
BuildUnsizedDataPacket(&framer, header, frames));
EXPECT_TRUE(packet != nullptr);
size_t encrypted_length =
framer.EncryptPayload(ENCRYPTION_INITIAL, header.packet_number, *packet,
buffer_, ABSL_ARRAYSIZE(buffer_));
ASSERT_NE(0u, encrypted_length);
packet_ = std::make_unique<QuicEncryptedPacket>(buffer_, encrypted_length);
EXPECT_TRUE(packet_ != nullptr);
DeleteFrames(&frames);
}
protected:
ParsedQuicVersion version_;
TestDelegate delegate_;
std::unique_ptr<QuicEncryptedPacket> packet_;
char buffer_[kMaxOutgoingPacketSize];
};
INSTANTIATE_TEST_SUITE_P(
ChloExtractorTests,
ChloExtractorTest,
::testing::ValuesIn(AllSupportedVersionsWithQuicCrypto()),
::testing::PrintToStringParamName());
TEST_P(ChloExtractorTest, FindsValidChlo) {
CryptoHandshakeMessage client_hello;
client_hello.set_tag(kCHLO);
std::string client_hello_str(client_hello.GetSerialized().AsStringPiece());
MakePacket(client_hello_str, /*munge_offset=*/false,
/*munge_stream_id=*/false);
EXPECT_TRUE(ChloExtractor::Extract(*packet_, version_, {}, &delegate_,
kQuicDefaultConnectionIdLength));
EXPECT_EQ(version_.transport_version, delegate_.transport_version());
EXPECT_EQ(TestConnectionId(), delegate_.connection_id());
EXPECT_EQ(client_hello.DebugString(), delegate_.chlo());
}
TEST_P(ChloExtractorTest, DoesNotFindValidChloOnWrongStream) {
if (version_.UsesCryptoFrames()) {
// When crypto frames are in use we do not use stream frames.
return;
}
CryptoHandshakeMessage client_hello;
client_hello.set_tag(kCHLO);
std::string client_hello_str(client_hello.GetSerialized().AsStringPiece());
MakePacket(client_hello_str,
/*munge_offset=*/false, /*munge_stream_id=*/true);
EXPECT_FALSE(ChloExtractor::Extract(*packet_, version_, {}, &delegate_,
kQuicDefaultConnectionIdLength));
}
TEST_P(ChloExtractorTest, DoesNotFindValidChloOnWrongOffset) {
CryptoHandshakeMessage client_hello;
client_hello.set_tag(kCHLO);
std::string client_hello_str(client_hello.GetSerialized().AsStringPiece());
MakePacket(client_hello_str, /*munge_offset=*/true,
/*munge_stream_id=*/false);
EXPECT_FALSE(ChloExtractor::Extract(*packet_, version_, {}, &delegate_,
kQuicDefaultConnectionIdLength));
}
TEST_P(ChloExtractorTest, DoesNotFindInvalidChlo) {
MakePacket("foo", /*munge_offset=*/false,
/*munge_stream_id=*/false);
EXPECT_FALSE(ChloExtractor::Extract(*packet_, version_, {}, &delegate_,
kQuicDefaultConnectionIdLength));
}
TEST_P(ChloExtractorTest, FirstFlight) {
std::vector<std::unique_ptr<QuicReceivedPacket>> packets =
GetFirstFlightOfPackets(version_);
ASSERT_EQ(packets.size(), 1u);
EXPECT_TRUE(ChloExtractor::Extract(*packets[0], version_, {}, &delegate_,
kQuicDefaultConnectionIdLength));
EXPECT_EQ(version_.transport_version, delegate_.transport_version());
EXPECT_EQ(TestConnectionId(), delegate_.connection_id());
EXPECT_EQ(AlpnForVersion(version_), delegate_.alpn());
}
} // namespace
} // namespace test
} // namespace quic
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