ssl/test/runner/runner.go

// Copyright (c) 2016, Google Inc.
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

package runner

import (
	"bytes"
	"crypto/ecdsa"
	"crypto/elliptic"
	"crypto/rand"
	"crypto/x509"
	"crypto/x509/pkix"
	"encoding/base64"
	"encoding/hex"
	"encoding/json"
	"encoding/pem"
	"errors"
	"flag"
	"fmt"
	"io"
	"io/ioutil"
	"math/big"
	"net"
	"os"
	"os/exec"
	"path"
	"path/filepath"
	"runtime"
	"strconv"
	"strings"
	"sync"
	"syscall"
	"time"
)

var (
	useValgrind        = flag.Bool("valgrind", false, "If true, run code under valgrind")
	useGDB             = flag.Bool("gdb", false, "If true, run BoringSSL code under gdb")
	useLLDB            = flag.Bool("lldb", false, "If true, run BoringSSL code under lldb")
	flagDebug          = flag.Bool("debug", false, "Hexdump the contents of the connection")
	mallocTest         = flag.Int64("malloc-test", -1, "If non-negative, run each test with each malloc in turn failing from the given number onwards.")
	mallocTestDebug    = flag.Bool("malloc-test-debug", false, "If true, ask bssl_shim to abort rather than fail a malloc. This can be used with a specific value for --malloc-test to identity the malloc failing that is causing problems.")
	jsonOutput         = flag.String("json-output", "", "The file to output JSON results to.")
	pipe               = flag.Bool("pipe", false, "If true, print status output suitable for piping into another program.")
	testToRun          = flag.String("test", "", "The pattern to filter tests to run, or empty to run all tests")
	numWorkers         = flag.Int("num-workers", runtime.NumCPU(), "The number of workers to run in parallel.")
	shimPath           = flag.String("shim-path", "../../../build/ssl/test/bssl_shim", "The location of the shim binary.")
	resourceDir        = flag.String("resource-dir", ".", "The directory in which to find certificate and key files.")
	fuzzer             = flag.Bool("fuzzer", false, "If true, tests against a BoringSSL built in fuzzer mode.")
	transcriptDir      = flag.String("transcript-dir", "", "The directory in which to write transcripts.")
	idleTimeout        = flag.Duration("idle-timeout", 15*time.Second, "The number of seconds to wait for a read or write to bssl_shim.")
	deterministic      = flag.Bool("deterministic", false, "If true, uses a deterministic PRNG in the runner.")
	allowUnimplemented = flag.Bool("allow-unimplemented", false, "If true, report pass even if some tests are unimplemented.")
	looseErrors        = flag.Bool("loose-errors", false, "If true, allow shims to report an untranslated error code.")
	shimConfigFile     = flag.String("shim-config", "", "A config file to use to configure the tests for this shim.")
	includeDisabled    = flag.Bool("include-disabled", false, "If true, also runs disabled tests.")
	repeatUntilFailure = flag.Bool("repeat-until-failure", false, "If true, the first selected test will be run repeatedly until failure.")
)

// ShimConfigurations is used with the “json” package and represents a shim
// config file.
type ShimConfiguration struct {
	// DisabledTests maps from a glob-based pattern to a freeform string.
	// The glob pattern is used to exclude tests from being run and the
	// freeform string is unparsed but expected to explain why the test is
	// disabled.
	DisabledTests map[string]string

	// ErrorMap maps from expected error strings to the correct error
	// string for the shim in question. For example, it might map
	// “:NO_SHARED_CIPHER:” (a BoringSSL error string) to something
	// like “SSL_ERROR_NO_CYPHER_OVERLAP”.
	ErrorMap map[string]string

	// HalfRTTTickets is the number of half-RTT tickets the client should
	// expect before half-RTT data when testing 0-RTT.
	HalfRTTTickets int
}

// Setup shimConfig defaults aligning with BoringSSL.
var shimConfig ShimConfiguration = ShimConfiguration{
	HalfRTTTickets: 2,
}

type testCert int

const (
	testCertRSA testCert = iota
	testCertRSA1024
	testCertRSAChain
	testCertECDSAP224
	testCertECDSAP256
	testCertECDSAP384
	testCertECDSAP521
	testCertEd25519
)

const (
	rsaCertificateFile       = "cert.pem"
	rsa1024CertificateFile   = "rsa_1024_cert.pem"
	rsaChainCertificateFile  = "rsa_chain_cert.pem"
	ecdsaP224CertificateFile = "ecdsa_p224_cert.pem"
	ecdsaP256CertificateFile = "ecdsa_p256_cert.pem"
	ecdsaP384CertificateFile = "ecdsa_p384_cert.pem"
	ecdsaP521CertificateFile = "ecdsa_p521_cert.pem"
	ed25519CertificateFile   = "ed25519_cert.pem"
)

const (
	rsaKeyFile       = "key.pem"
	rsa1024KeyFile   = "rsa_1024_key.pem"
	rsaChainKeyFile  = "rsa_chain_key.pem"
	ecdsaP224KeyFile = "ecdsa_p224_key.pem"
	ecdsaP256KeyFile = "ecdsa_p256_key.pem"
	ecdsaP384KeyFile = "ecdsa_p384_key.pem"
	ecdsaP521KeyFile = "ecdsa_p521_key.pem"
	ed25519KeyFile   = "ed25519_key.pem"
	channelIDKeyFile = "channel_id_key.pem"
)

var (
	rsaCertificate       Certificate
	rsa1024Certificate   Certificate
	rsaChainCertificate  Certificate
	ecdsaP224Certificate Certificate
	ecdsaP256Certificate Certificate
	ecdsaP384Certificate Certificate
	ecdsaP521Certificate Certificate
	ed25519Certificate   Certificate
	garbageCertificate   Certificate
)

var testCerts = []struct {
	id                testCert
	certFile, keyFile string
	cert              *Certificate
}{
	{
		id:       testCertRSA,
		certFile: rsaCertificateFile,
		keyFile:  rsaKeyFile,
		cert:     &rsaCertificate,
	},
	{
		id:       testCertRSA1024,
		certFile: rsa1024CertificateFile,
		keyFile:  rsa1024KeyFile,
		cert:     &rsa1024Certificate,
	},
	{
		id:       testCertRSAChain,
		certFile: rsaChainCertificateFile,
		keyFile:  rsaChainKeyFile,
		cert:     &rsaChainCertificate,
	},
	{
		id:       testCertECDSAP224,
		certFile: ecdsaP224CertificateFile,
		keyFile:  ecdsaP224KeyFile,
		cert:     &ecdsaP224Certificate,
	},
	{
		id:       testCertECDSAP256,
		certFile: ecdsaP256CertificateFile,
		keyFile:  ecdsaP256KeyFile,
		cert:     &ecdsaP256Certificate,
	},
	{
		id:       testCertECDSAP384,
		certFile: ecdsaP384CertificateFile,
		keyFile:  ecdsaP384KeyFile,
		cert:     &ecdsaP384Certificate,
	},
	{
		id:       testCertECDSAP521,
		certFile: ecdsaP521CertificateFile,
		keyFile:  ecdsaP521KeyFile,
		cert:     &ecdsaP521Certificate,
	},
	{
		id:       testCertEd25519,
		certFile: ed25519CertificateFile,
		keyFile:  ed25519KeyFile,
		cert:     &ed25519Certificate,
	},
}

var channelIDKey *ecdsa.PrivateKey
var channelIDBytes []byte

var testOCSPResponse = []byte{1, 2, 3, 4}
var testOCSPResponse2 = []byte{5, 6, 7, 8}
var testSCTList = []byte{0, 6, 0, 4, 5, 6, 7, 8}
var testSCTList2 = []byte{0, 6, 0, 4, 1, 2, 3, 4}

var testOCSPExtension = append([]byte{byte(extensionStatusRequest) >> 8, byte(extensionStatusRequest), 0, 8, statusTypeOCSP, 0, 0, 4}, testOCSPResponse...)
var testSCTExtension = append([]byte{byte(extensionSignedCertificateTimestamp) >> 8, byte(extensionSignedCertificateTimestamp), 0, byte(len(testSCTList))}, testSCTList...)

func initCertificates() {
	for i := range testCerts {
		cert, err := LoadX509KeyPair(path.Join(*resourceDir, testCerts[i].certFile), path.Join(*resourceDir, testCerts[i].keyFile))
		if err != nil {
			panic(err)
		}
		cert.OCSPStaple = testOCSPResponse
		cert.SignedCertificateTimestampList = testSCTList
		*testCerts[i].cert = cert
	}

	channelIDPEMBlock, err := ioutil.ReadFile(path.Join(*resourceDir, channelIDKeyFile))
	if err != nil {
		panic(err)
	}
	channelIDDERBlock, _ := pem.Decode(channelIDPEMBlock)
	if channelIDDERBlock.Type != "EC PRIVATE KEY" {
		panic("bad key type")
	}
	channelIDKey, err = x509.ParseECPrivateKey(channelIDDERBlock.Bytes)
	if err != nil {
		panic(err)
	}
	if channelIDKey.Curve != elliptic.P256() {
		panic("bad curve")
	}

	channelIDBytes = make([]byte, 64)
	writeIntPadded(channelIDBytes[:32], channelIDKey.X)
	writeIntPadded(channelIDBytes[32:], channelIDKey.Y)

	garbageCertificate.Certificate = [][]byte{[]byte("GARBAGE")}
	garbageCertificate.PrivateKey = rsaCertificate.PrivateKey
}

func getRunnerCertificate(t testCert) Certificate {
	for _, cert := range testCerts {
		if cert.id == t {
			return *cert.cert
		}
	}
	panic("Unknown test certificate")
}

func getShimCertificate(t testCert) string {
	for _, cert := range testCerts {
		if cert.id == t {
			return cert.certFile
		}
	}
	panic("Unknown test certificate")
}

func getShimKey(t testCert) string {
	for _, cert := range testCerts {
		if cert.id == t {
			return cert.keyFile
		}
	}
	panic("Unknown test certificate")
}

// recordVersionToWire maps a record-layer protocol version to its wire
// representation.
func recordVersionToWire(vers uint16, protocol protocol) uint16 {
	if protocol == dtls {
		switch vers {
		case VersionTLS12:
			return VersionDTLS12
		case VersionTLS10:
			return VersionDTLS10
		}
	} else {
		switch vers {
		case VersionSSL30, VersionTLS10, VersionTLS11, VersionTLS12:
			return vers
		}
	}

	panic("unknown version")
}

// encodeDERValues encodes a series of bytestrings in comma-separated-hex form.
func encodeDERValues(values [][]byte) string {
	var ret string
	for i, v := range values {
		if i > 0 {
			ret += ","
		}
		ret += hex.EncodeToString(v)
	}

	return ret
}

type testType int

const (
	clientTest testType = iota
	serverTest
)

type protocol int

const (
	tls protocol = iota
	dtls
)

const (
	alpn = 1
	npn  = 2
)

type testCase struct {
	testType      testType
	protocol      protocol
	name          string
	config        Config
	shouldFail    bool
	expectedError string
	// expectedLocalError, if not empty, contains a substring that must be
	// found in the local error.
	expectedLocalError string
	// expectedVersion, if non-zero, specifies the TLS version that must be
	// negotiated.
	expectedVersion uint16
	// expectedResumeVersion, if non-zero, specifies the TLS version that
	// must be negotiated on resumption. If zero, expectedVersion is used.
	expectedResumeVersion uint16
	// expectedCipher, if non-zero, specifies the TLS cipher suite that
	// should be negotiated.
	expectedCipher uint16
	// expectChannelID controls whether the connection should have
	// negotiated a Channel ID with channelIDKey.
	expectChannelID bool
	// expectedNextProto controls whether the connection should
	// negotiate a next protocol via NPN or ALPN.
	expectedNextProto string
	// expectNoNextProto, if true, means that no next protocol should be
	// negotiated.
	expectNoNextProto bool
	// expectedNextProtoType, if non-zero, is the expected next
	// protocol negotiation mechanism.
	expectedNextProtoType int
	// expectedSRTPProtectionProfile is the DTLS-SRTP profile that
	// should be negotiated. If zero, none should be negotiated.
	expectedSRTPProtectionProfile uint16
	// expectedOCSPResponse, if not nil, is the expected OCSP response to be received.
	expectedOCSPResponse []uint8
	// expectedSCTList, if not nil, is the expected SCT list to be received.
	expectedSCTList []uint8
	// expectedPeerSignatureAlgorithm, if not zero, is the signature
	// algorithm that the peer should have used in the handshake.
	expectedPeerSignatureAlgorithm signatureAlgorithm
	// expectedCurveID, if not zero, is the curve that the handshake should
	// have used.
	expectedCurveID CurveID
	// messageLen is the length, in bytes, of the test message that will be
	// sent.
	messageLen int
	// messageCount is the number of test messages that will be sent.
	messageCount int
	// certFile is the path to the certificate to use for the server.
	certFile string
	// keyFile is the path to the private key to use for the server.
	keyFile string
	// resumeSession controls whether a second connection should be tested
	// which attempts to resume the first session.
	resumeSession bool
	// resumeRenewedSession controls whether a third connection should be
	// tested which attempts to resume the second connection's session.
	resumeRenewedSession bool
	// expectResumeRejected, if true, specifies that the attempted
	// resumption must be rejected by the client. This is only valid for a
	// serverTest.
	expectResumeRejected bool
	// resumeConfig, if not nil, points to a Config to be used on
	// resumption. Unless newSessionsOnResume is set,
	// SessionTicketKey, ServerSessionCache, and
	// ClientSessionCache are copied from the initial connection's
	// config. If nil, the initial connection's config is used.
	resumeConfig *Config
	// newSessionsOnResume, if true, will cause resumeConfig to
	// use a different session resumption context.
	newSessionsOnResume bool
	// noSessionCache, if true, will cause the server to run without a
	// session cache.
	noSessionCache bool
	// sendPrefix sends a prefix on the socket before actually performing a
	// handshake.
	sendPrefix string
	// shimWritesFirst controls whether the shim sends an initial "hello"
	// message before doing a roundtrip with the runner.
	shimWritesFirst bool
	// readWithUnfinishedWrite behaves like shimWritesFirst, but the shim
	// does not complete the write until responding to the first runner
	// message.
	readWithUnfinishedWrite bool
	// shimShutsDown, if true, runs a test where the shim shuts down the
	// connection immediately after the handshake rather than echoing
	// messages from the runner.
	shimShutsDown bool
	// renegotiate indicates the number of times the connection should be
	// renegotiated during the exchange.
	renegotiate int
	// sendHalfHelloRequest, if true, causes the server to send half a
	// HelloRequest when the handshake completes.
	sendHalfHelloRequest bool
	// renegotiateCiphers is a list of ciphersuite ids that will be
	// switched in just before renegotiation.
	renegotiateCiphers []uint16
	// replayWrites, if true, configures the underlying transport
	// to replay every write it makes in DTLS tests.
	replayWrites bool
	// damageFirstWrite, if true, configures the underlying transport to
	// damage the final byte of the first application data write.
	damageFirstWrite bool
	// exportKeyingMaterial, if non-zero, configures the test to exchange
	// keying material and verify they match.
	exportKeyingMaterial int
	exportLabel          string
	exportContext        string
	useExportContext     bool
	// flags, if not empty, contains a list of command-line flags that will
	// be passed to the shim program.
	flags []string
	// testTLSUnique, if true, causes the shim to send the tls-unique value
	// which will be compared against the expected value.
	testTLSUnique bool
	// sendEmptyRecords is the number of consecutive empty records to send
	// before each test message.
	sendEmptyRecords int
	// sendWarningAlerts is the number of consecutive warning alerts to send
	// before each test message.
	sendWarningAlerts int
	// sendBogusAlertType, if true, causes a bogus alert of invalid type to
	// be sent before each test message.
	sendBogusAlertType bool
	// sendKeyUpdates is the number of consecutive key updates to send
	// before and after the test message.
	sendKeyUpdates int
	// keyUpdateRequest is the KeyUpdateRequest value to send in KeyUpdate messages.
	keyUpdateRequest byte
	// expectMessageDropped, if true, means the test message is expected to
	// be dropped by the client rather than echoed back.
	expectMessageDropped bool
	// expectPeerCertificate, if not nil, is the certificate chain the peer
	// is expected to send.
	expectPeerCertificate *Certificate
	// shimPrefix is the prefix that the shim will send to the server.
	shimPrefix string
	// resumeShimPrefix is the prefix that the shim will send to the server on a
	// resumption.
	resumeShimPrefix string
	// tls13Variant, if non-zero, causes both runner and shim to be
	// configured with the specified TLS 1.3 variant. This is a convenience
	// option for configuring both concurrently.
	tls13Variant int
}

var testCases []testCase

func writeTranscript(test *testCase, path string, data []byte) {
	if len(data) == 0 {
		return
	}

	settings, err := ioutil.ReadFile(path)
	if err != nil {
		fmt.Fprintf(os.Stderr, "Error reading %s: %s.\n", path, err)
		return
	}

	settings = append(settings, data...)
	if err := ioutil.WriteFile(path, settings, 0644); err != nil {
		fmt.Fprintf(os.Stderr, "Error writing %s: %s\n", path, err)
	}
}

// A timeoutConn implements an idle timeout on each Read and Write operation.
type timeoutConn struct {
	net.Conn
	timeout time.Duration
}

func (t *timeoutConn) Read(b []byte) (int, error) {
	if !*useGDB {
		if err := t.SetReadDeadline(time.Now().Add(t.timeout)); err != nil {
			return 0, err
		}
	}
	return t.Conn.Read(b)
}

func (t *timeoutConn) Write(b []byte) (int, error) {
	if !*useGDB {
		if err := t.SetWriteDeadline(time.Now().Add(t.timeout)); err != nil {
			return 0, err
		}
	}
	return t.Conn.Write(b)
}

func doExchange(test *testCase, config *Config, conn net.Conn, isResume bool, transcriptPrefix string, num int) error {
	if !test.noSessionCache {
		if config.ClientSessionCache == nil {
			config.ClientSessionCache = NewLRUClientSessionCache(1)
		}
		if config.ServerSessionCache == nil {
			config.ServerSessionCache = NewLRUServerSessionCache(1)
		}
	}
	if test.testType == clientTest {
		if len(config.Certificates) == 0 {
			config.Certificates = []Certificate{rsaCertificate}
		}
	} else {
		// Supply a ServerName to ensure a constant session cache key,
		// rather than falling back to net.Conn.RemoteAddr.
		if len(config.ServerName) == 0 {
			config.ServerName = "test"
		}
	}
	if *fuzzer {
		config.Bugs.NullAllCiphers = true
	}
	if *deterministic {
		config.Time = func() time.Time { return time.Unix(1234, 1234) }
	}
	if test.tls13Variant != 0 {
		config.TLS13Variant = test.tls13Variant
	}

	conn = &timeoutConn{conn, *idleTimeout}

	if test.protocol == dtls {
		config.Bugs.PacketAdaptor = newPacketAdaptor(conn)
		conn = config.Bugs.PacketAdaptor
	}

	if *flagDebug || len(*transcriptDir) != 0 {
		local, peer := "client", "server"
		if test.testType == clientTest {
			local, peer = peer, local
		}
		connDebug := &recordingConn{
			Conn:       conn,
			isDatagram: test.protocol == dtls,
			local:      local,
			peer:       peer,
		}
		conn = connDebug
		if *flagDebug {
			defer connDebug.WriteTo(os.Stdout)
		}
		if len(transcriptPrefix) != 0 {
			defer func() {
				path := transcriptPrefix + strconv.Itoa(num)
				writeTranscript(test, path, connDebug.Transcript())
			}()
		}

		if config.Bugs.PacketAdaptor != nil {
			config.Bugs.PacketAdaptor.debug = connDebug
		}
	}

	if test.replayWrites {
		conn = newReplayAdaptor(conn)
	}

	var connDamage *damageAdaptor
	if test.damageFirstWrite {
		connDamage = newDamageAdaptor(conn)
		conn = connDamage
	}

	if test.sendPrefix != "" {
		if _, err := conn.Write([]byte(test.sendPrefix)); err != nil {
			return err
		}
	}

	var tlsConn *Conn
	if test.testType == clientTest {
		if test.protocol == dtls {
			tlsConn = DTLSServer(conn, config)
		} else {
			tlsConn = Server(conn, config)
		}
	} else {
		config.InsecureSkipVerify = true
		if test.protocol == dtls {
			tlsConn = DTLSClient(conn, config)
		} else {
			tlsConn = Client(conn, config)
		}
	}
	defer tlsConn.Close()

	if err := tlsConn.Handshake(); err != nil {
		return err
	}

	// TODO(davidben): move all per-connection expectations into a dedicated
	// expectations struct that can be specified separately for the two
	// legs.
	expectedVersion := test.expectedVersion
	if isResume && test.expectedResumeVersion != 0 {
		expectedVersion = test.expectedResumeVersion
	}
	connState := tlsConn.ConnectionState()
	if vers := connState.Version; expectedVersion != 0 && vers != expectedVersion {
		return fmt.Errorf("got version %x, expected %x", vers, expectedVersion)
	}

	if cipher := connState.CipherSuite; test.expectedCipher != 0 && cipher != test.expectedCipher {
		return fmt.Errorf("got cipher %x, expected %x", cipher, test.expectedCipher)
	}
	if didResume := connState.DidResume; isResume && didResume == test.expectResumeRejected {
		return fmt.Errorf("didResume is %t, but we expected the opposite", didResume)
	}

	if test.expectChannelID {
		channelID := connState.ChannelID
		if channelID == nil {
			return fmt.Errorf("no channel ID negotiated")
		}
		if channelID.Curve != channelIDKey.Curve ||
			channelIDKey.X.Cmp(channelIDKey.X) != 0 ||
			channelIDKey.Y.Cmp(channelIDKey.Y) != 0 {
			return fmt.Errorf("incorrect channel ID")
		}
	} else if connState.ChannelID != nil {
		return fmt.Errorf("channel ID unexpectedly negotiated")
	}

	if expected := test.expectedNextProto; expected != "" {
		if actual := connState.NegotiatedProtocol; actual != expected {
			return fmt.Errorf("next proto mismatch: got %s, wanted %s", actual, expected)
		}
	}

	if test.expectNoNextProto {
		if actual := connState.NegotiatedProtocol; actual != "" {
			return fmt.Errorf("got unexpected next proto %s", actual)
		}
	}

	if test.expectedNextProtoType != 0 {
		if (test.expectedNextProtoType == alpn) != connState.NegotiatedProtocolFromALPN {
			return fmt.Errorf("next proto type mismatch")
		}
	}

	if p := connState.SRTPProtectionProfile; p != test.expectedSRTPProtectionProfile {
		return fmt.Errorf("SRTP profile mismatch: got %d, wanted %d", p, test.expectedSRTPProtectionProfile)
	}

	if test.expectedOCSPResponse != nil && !bytes.Equal(test.expectedOCSPResponse, tlsConn.OCSPResponse()) {
		return fmt.Errorf("OCSP Response mismatch: got %x, wanted %x", tlsConn.OCSPResponse(), test.expectedOCSPResponse)
	}

	if test.expectedSCTList != nil && !bytes.Equal(test.expectedSCTList, connState.SCTList) {
		return fmt.Errorf("SCT list mismatch")
	}

	if expected := test.expectedPeerSignatureAlgorithm; expected != 0 && expected != connState.PeerSignatureAlgorithm {
		return fmt.Errorf("expected peer to use signature algorithm %04x, but got %04x", expected, connState.PeerSignatureAlgorithm)
	}

	if expected := test.expectedCurveID; expected != 0 && expected != connState.CurveID {
		return fmt.Errorf("expected peer to use curve %04x, but got %04x", expected, connState.CurveID)
	}

	if test.expectPeerCertificate != nil {
		if len(connState.PeerCertificates) != len(test.expectPeerCertificate.Certificate) {
			return fmt.Errorf("expected peer to send %d certificates, but got %d", len(connState.PeerCertificates), len(test.expectPeerCertificate.Certificate))
		}
		for i, cert := range connState.PeerCertificates {
			if !bytes.Equal(cert.Raw, test.expectPeerCertificate.Certificate[i]) {
				return fmt.Errorf("peer certificate %d did not match", i+1)
			}
		}
	}

	if test.exportKeyingMaterial > 0 {
		actual := make([]byte, test.exportKeyingMaterial)
		if _, err := io.ReadFull(tlsConn, actual); err != nil {
			return err
		}
		expected, err := tlsConn.ExportKeyingMaterial(test.exportKeyingMaterial, []byte(test.exportLabel), []byte(test.exportContext), test.useExportContext)
		if err != nil {
			return err
		}
		if !bytes.Equal(actual, expected) {
			return fmt.Errorf("keying material mismatch")
		}
	}

	if test.testTLSUnique {
		var peersValue [12]byte
		if _, err := io.ReadFull(tlsConn, peersValue[:]); err != nil {
			return err
		}
		expected := tlsConn.ConnectionState().TLSUnique
		if !bytes.Equal(peersValue[:], expected) {
			return fmt.Errorf("tls-unique mismatch: peer sent %x, but %x was expected", peersValue[:], expected)
		}
	}

	if test.sendHalfHelloRequest {
		tlsConn.SendHalfHelloRequest()
	}

	shimPrefix := test.shimPrefix
	if isResume {
		shimPrefix = test.resumeShimPrefix
	}
	if test.shimWritesFirst || test.readWithUnfinishedWrite {
		shimPrefix = "hello"
	}
	if test.renegotiate > 0 {
		// If readWithUnfinishedWrite is set, the shim prefix will be
		// available later.
		if shimPrefix != "" && !test.readWithUnfinishedWrite {
			var buf = make([]byte, len(shimPrefix))
			_, err := io.ReadFull(tlsConn, buf)
			if err != nil {
				return err
			}
			if string(buf) != shimPrefix {
				return fmt.Errorf("bad initial message %v vs %v", string(buf), shimPrefix)
			}
			shimPrefix = ""
		}

		if test.renegotiateCiphers != nil {
			config.CipherSuites = test.renegotiateCiphers
		}
		for i := 0; i < test.renegotiate; i++ {
			if err := tlsConn.Renegotiate(); err != nil {
				return err
			}
		}
	} else if test.renegotiateCiphers != nil {
		panic("renegotiateCiphers without renegotiate")
	}

	if test.damageFirstWrite {
		connDamage.setDamage(true)
		tlsConn.Write([]byte("DAMAGED WRITE"))
		connDamage.setDamage(false)
	}

	messageLen := test.messageLen
	if messageLen < 0 {
		if test.protocol == dtls {
			return fmt.Errorf("messageLen < 0 not supported for DTLS tests")
		}
		// Read until EOF.
		_, err := io.Copy(ioutil.Discard, tlsConn)
		return err
	}
	if messageLen == 0 {
		messageLen = 32
	}

	messageCount := test.messageCount
	if messageCount == 0 {
		messageCount = 1
	}

	for j := 0; j < messageCount; j++ {
		for i := 0; i < test.sendKeyUpdates; i++ {
			tlsConn.SendKeyUpdate(test.keyUpdateRequest)
		}

		for i := 0; i < test.sendEmptyRecords; i++ {
			tlsConn.Write(nil)
		}

		for i := 0; i < test.sendWarningAlerts; i++ {
			tlsConn.SendAlert(alertLevelWarning, alertUnexpectedMessage)
		}

		if test.sendBogusAlertType {
			tlsConn.SendAlert(0x42, alertUnexpectedMessage)
		}

		testMessage := make([]byte, messageLen)
		for i := range testMessage {
			testMessage[i] = 0x42 ^ byte(j)
		}
		tlsConn.Write(testMessage)

		// Consume the shim prefix if needed.
		if shimPrefix != "" {
			var buf = make([]byte, len(shimPrefix))
			_, err := io.ReadFull(tlsConn, buf)
			if err != nil {
				return err
			}
			if string(buf) != shimPrefix {
				return fmt.Errorf("bad initial message %v vs %v", string(buf), shimPrefix)
			}
			shimPrefix = ""
		}

		if test.shimShutsDown || test.expectMessageDropped {
			// The shim will not respond.
			continue
		}

		// Process the KeyUpdate ACK. However many KeyUpdates the runner
		// sends, the shim should respond only once.
		if test.sendKeyUpdates > 0 && test.keyUpdateRequest == keyUpdateRequested {
			if err := tlsConn.ReadKeyUpdateACK(); err != nil {
				return err
			}
		}

		buf := make([]byte, len(testMessage))
		if test.protocol == dtls {
			bufTmp := make([]byte, len(buf)+1)
			n, err := tlsConn.Read(bufTmp)
			if err != nil {
				return err
			}
			if n != len(buf) {
				return fmt.Errorf("bad reply; length mismatch (%d vs %d)", n, len(buf))
			}
			copy(buf, bufTmp)
		} else {
			_, err := io.ReadFull(tlsConn, buf)
			if err != nil {
				return err
			}
		}

		for i, v := range buf {
			if v != testMessage[i]^0xff {
				return fmt.Errorf("bad reply contents at byte %d", i)
			}
		}
	}

	return nil
}

func valgrindOf(dbAttach bool, path string, args ...string) *exec.Cmd {
	valgrindArgs := []string{"--error-exitcode=99", "--track-origins=yes", "--leak-check=full", "--quiet"}
	if dbAttach {
		valgrindArgs = append(valgrindArgs, "--db-attach=yes", "--db-command=xterm -e gdb -nw %f %p")
	}
	valgrindArgs = append(valgrindArgs, path)
	valgrindArgs = append(valgrindArgs, args...)

	return exec.Command("valgrind", valgrindArgs...)
}

func gdbOf(path string, args ...string) *exec.Cmd {
	xtermArgs := []string{"-e", "gdb", "--args"}
	xtermArgs = append(xtermArgs, path)
	xtermArgs = append(xtermArgs, args...)

	return exec.Command("xterm", xtermArgs...)
}

func lldbOf(path string, args ...string) *exec.Cmd {
	xtermArgs := []string{"-e", "lldb", "--"}
	xtermArgs = append(xtermArgs, path)
	xtermArgs = append(xtermArgs, args...)

	return exec.Command("xterm", xtermArgs...)
}

var (
	errMoreMallocs   = errors.New("child process did not exhaust all allocation calls")
	errUnimplemented = errors.New("child process does not implement needed flags")
)

// accept accepts a connection from listener, unless waitChan signals a process
// exit first.
func acceptOrWait(listener *net.TCPListener, waitChan chan error) (net.Conn, error) {
	type connOrError struct {
		conn               net.Conn
		err                error
		startTime, endTime time.Time
	}
	connChan := make(chan connOrError, 1)
	go func() {
		startTime := time.Now()
		if !*useGDB {
			listener.SetDeadline(time.Now().Add(*idleTimeout))
		}
		conn, err := listener.Accept()
		endTime := time.Now()
		connChan <- connOrError{conn, err, startTime, endTime}
		close(connChan)
	}()
	select {
	case result := <-connChan:
		if result.err != nil {
			// TODO(davidben): Remove this logging when
			// https://crbug.com/boringssl/199 is resolved.
			fmt.Fprintf(os.Stderr, "acceptOrWait failed, startTime=%v, endTime=%v\n", result.startTime, result.endTime)
		}
		return result.conn, result.err
	case childErr := <-waitChan:
		waitChan <- childErr
		return nil, fmt.Errorf("child exited early: %s", childErr)
	}
}

func translateExpectedError(errorStr string) string {
	if translated, ok := shimConfig.ErrorMap[errorStr]; ok {
		return translated
	}

	if *looseErrors {
		return ""
	}

	return errorStr
}

func runTest(test *testCase, shimPath string, mallocNumToFail int64) error {
	// Help debugging panics on the Go side.
	defer func() {
		if r := recover(); r != nil {
			fmt.Fprintf(os.Stderr, "Test '%s' panicked.\n", test.name)
			panic(r)
		}
	}()

	if !test.shouldFail && (len(test.expectedError) > 0 || len(test.expectedLocalError) > 0) {
		panic("Error expected without shouldFail in " + test.name)
	}

	if test.expectResumeRejected && !test.resumeSession {
		panic("expectResumeRejected without resumeSession in " + test.name)
	}

	for _, ver := range tlsVersions {
		if !strings.Contains("-"+test.name+"-", "-"+ver.name+"-") {
			continue
		}

		if test.config.MaxVersion == 0 && test.config.MinVersion == 0 && test.expectedVersion == 0 {
			panic(fmt.Sprintf("The name of test %q suggests that it's version specific, but min/max version in the Config is %x/%x. One of them should probably be %x", test.name, test.config.MinVersion, test.config.MaxVersion, ver.version))
		}

		if ver.tls13Variant != 0 {
			var foundFlag bool
			for _, flag := range test.flags {
				if flag == "-tls13-variant" {
					foundFlag = true
					break
				}
			}
			if !foundFlag && test.config.TLS13Variant != ver.tls13Variant && test.tls13Variant != ver.tls13Variant {
				panic(fmt.Sprintf("The name of test %q suggests that uses an experimental TLS 1.3 variant, but neither the shim nor the runner configures it", test.name))
			}
		}

	}

	listener, err := net.ListenTCP("tcp", &net.TCPAddr{IP: net.IPv6loopback})
	if err != nil {
		listener, err = net.ListenTCP("tcp4", &net.TCPAddr{IP: net.IP{127, 0, 0, 1}})
	}
	if err != nil {
		panic(err)
	}
	defer func() {
		if listener != nil {
			listener.Close()
		}
	}()

	flags := []string{"-port", strconv.Itoa(listener.Addr().(*net.TCPAddr).Port)}
	if test.testType == serverTest {
		flags = append(flags, "-server")

		flags = append(flags, "-key-file")
		if test.keyFile == "" {
			flags = append(flags, path.Join(*resourceDir, rsaKeyFile))
		} else {
			flags = append(flags, path.Join(*resourceDir, test.keyFile))
		}

		flags = append(flags, "-cert-file")
		if test.certFile == "" {
			flags = append(flags, path.Join(*resourceDir, rsaCertificateFile))
		} else {
			flags = append(flags, path.Join(*resourceDir, test.certFile))
		}
	}

	if test.protocol == dtls {
		flags = append(flags, "-dtls")
	}

	var resumeCount int
	if test.resumeSession {
		resumeCount++
		if test.resumeRenewedSession {
			resumeCount++
		}
	}

	if resumeCount > 0 {
		flags = append(flags, "-resume-count", strconv.Itoa(resumeCount))
	}

	if test.shimWritesFirst {
		flags = append(flags, "-shim-writes-first")
	}

	if test.readWithUnfinishedWrite {
		flags = append(flags, "-read-with-unfinished-write")
	}

	if test.shimShutsDown {
		flags = append(flags, "-shim-shuts-down")
	}

	if test.exportKeyingMaterial > 0 {
		flags = append(flags, "-export-keying-material", strconv.Itoa(test.exportKeyingMaterial))
		flags = append(flags, "-export-label", test.exportLabel)
		flags = append(flags, "-export-context", test.exportContext)
		if test.useExportContext {
			flags = append(flags, "-use-export-context")
		}
	}
	if test.expectResumeRejected {
		flags = append(flags, "-expect-session-miss")
	}

	if test.testTLSUnique {
		flags = append(flags, "-tls-unique")
	}

	if test.tls13Variant != 0 {
		flags = append(flags, "-tls13-variant", strconv.Itoa(test.tls13Variant))
	}

	var transcriptPrefix string
	if len(*transcriptDir) != 0 {
		protocol := "tls"
		if test.protocol == dtls {
			protocol = "dtls"
		}

		side := "client"
		if test.testType == serverTest {
			side = "server"
		}

		dir := filepath.Join(*transcriptDir, protocol, side)
		if err := os.MkdirAll(dir, 0755); err != nil {
			return err
		}
		transcriptPrefix = filepath.Join(dir, test.name+"-")
		flags = append(flags, "-write-settings", transcriptPrefix)
	}

	flags = append(flags, test.flags...)

	var shim *exec.Cmd
	if *useValgrind {
		shim = valgrindOf(false, shimPath, flags...)
	} else if *useGDB {
		shim = gdbOf(shimPath, flags...)
	} else if *useLLDB {
		shim = lldbOf(shimPath, flags...)
	} else {
		shim = exec.Command(shimPath, flags...)
	}
	shim.Stdin = os.Stdin
	var stdoutBuf, stderrBuf bytes.Buffer
	shim.Stdout = &stdoutBuf
	shim.Stderr = &stderrBuf
	if mallocNumToFail >= 0 {
		shim.Env = os.Environ()
		shim.Env = append(shim.Env, "MALLOC_NUMBER_TO_FAIL="+strconv.FormatInt(mallocNumToFail, 10))
		if *mallocTestDebug {
			shim.Env = append(shim.Env, "MALLOC_BREAK_ON_FAIL=1")
		}
		shim.Env = append(shim.Env, "_MALLOC_CHECK=1")
	}

	if err := shim.Start(); err != nil {
		panic(err)
	}
	waitChan := make(chan error, 1)
	go func() { waitChan <- shim.Wait() }()

	config := test.config

	if *deterministic {
		config.Rand = &deterministicRand{}
	}

	conn, err := acceptOrWait(listener, waitChan)
	if err == nil {
		err = doExchange(test, &config, conn, false /* not a resumption */, transcriptPrefix, 0)
		conn.Close()
	}

	for i := 0; err == nil && i < resumeCount; i++ {
		var resumeConfig Config
		if test.resumeConfig != nil {
			resumeConfig = *test.resumeConfig
			if !test.newSessionsOnResume {
				resumeConfig.SessionTicketKey = config.SessionTicketKey
				resumeConfig.ClientSessionCache = config.ClientSessionCache
				resumeConfig.ServerSessionCache = config.ServerSessionCache
			}
			resumeConfig.Rand = config.Rand
		} else {
			resumeConfig = config
		}
		var connResume net.Conn
		connResume, err = acceptOrWait(listener, waitChan)
		if err == nil {
			err = doExchange(test, &resumeConfig, connResume, true /* resumption */, transcriptPrefix, i+1)
			connResume.Close()
		}
	}

	// Close the listener now. This is to avoid hangs should the shim try to
	// open more connections than expected.
	listener.Close()
	listener = nil

	var shimKilledLock sync.Mutex
	var shimKilled bool
	waitTimeout := time.AfterFunc(*idleTimeout, func() {
		shimKilledLock.Lock()
		shimKilled = true
		shimKilledLock.Unlock()
		shim.Process.Kill()
	})
	childErr := <-waitChan
	waitTimeout.Stop()
	shimKilledLock.Lock()
	if shimKilled && err == nil {
		err = errors.New("timeout waiting for the shim to exit.")
	}
	shimKilledLock.Unlock()
	var isValgrindError bool
	if exitError, ok := childErr.(*exec.ExitError); ok {
		switch exitError.Sys().(syscall.WaitStatus).ExitStatus() {
		case 88:
			return errMoreMallocs
		case 89:
			return errUnimplemented
		case 99:
			isValgrindError = true
		}
	}

	// Account for Windows line endings.
	stdout := strings.Replace(string(stdoutBuf.Bytes()), "\r\n", "\n", -1)
	stderr := strings.Replace(string(stderrBuf.Bytes()), "\r\n", "\n", -1)

	// Separate the errors from the shim and those from tools like
	// AddressSanitizer.
	var extraStderr string
	if stderrParts := strings.SplitN(stderr, "--- DONE ---\n", 2); len(stderrParts) == 2 {
		stderr = stderrParts[0]
		extraStderr = stderrParts[1]
	}

	failed := err != nil || childErr != nil
	expectedError := translateExpectedError(test.expectedError)
	correctFailure := len(expectedError) == 0 || strings.Contains(stderr, expectedError)

	localError := "none"
	if err != nil {
		localError = err.Error()
	}
	if len(test.expectedLocalError) != 0 {
		correctFailure = correctFailure && strings.Contains(localError, test.expectedLocalError)
	}

	if failed != test.shouldFail || failed && !correctFailure {
		childError := "none"
		if childErr != nil {
			childError = childErr.Error()
		}

		var msg string
		switch {
		case failed && !test.shouldFail:
			msg = "unexpected failure"
		case !failed && test.shouldFail:
			msg = "unexpected success"
		case failed && !correctFailure:
			msg = "bad error (wanted '" + expectedError + "' / '" + test.expectedLocalError + "')"
		default:
			panic("internal error")
		}

		return fmt.Errorf("%s: local error '%s', child error '%s', stdout:\n%s\nstderr:\n%s\n%s", msg, localError, childError, stdout, stderr, extraStderr)
	}

	if len(extraStderr) > 0 || (!failed && len(stderr) > 0) {
		return fmt.Errorf("unexpected error output:\n%s\n%s", stderr, extraStderr)
	}

	if *useValgrind && isValgrindError {
		return fmt.Errorf("valgrind error:\n%s\n%s", stderr, extraStderr)
	}

	return nil
}

type tlsVersion struct {
	name string
	// version is the protocol version.
	version uint16
	// excludeFlag is the legacy shim flag to disable the version.
	excludeFlag string
	hasDTLS     bool
	// versionDTLS, if non-zero, is the DTLS-specific representation of the version.
	versionDTLS uint16
	// versionWire, if non-zero, is the wire representation of the
	// version. Otherwise the wire version is the protocol version or
	// versionDTLS.
	versionWire  uint16
	tls13Variant int
}

func (vers tlsVersion) shimFlag(protocol protocol) string {
	// The shim uses the protocol version in its public API, but uses the
	// DTLS-specific version if it exists.
	if protocol == dtls && vers.versionDTLS != 0 {
		return strconv.Itoa(int(vers.versionDTLS))
	}
	return strconv.Itoa(int(vers.version))
}

func (vers tlsVersion) wire(protocol protocol) uint16 {
	if protocol == dtls && vers.versionDTLS != 0 {
		return vers.versionDTLS
	}
	if vers.versionWire != 0 {
		return vers.versionWire
	}
	return vers.version
}

var tlsVersions = []tlsVersion{
	{
		name:        "SSL3",
		version:     VersionSSL30,
		excludeFlag: "-no-ssl3",
	},
	{
		name:        "TLS1",
		version:     VersionTLS10,
		excludeFlag: "-no-tls1",
		hasDTLS:     true,
		versionDTLS: VersionDTLS10,
	},
	{
		name:        "TLS11",
		version:     VersionTLS11,
		excludeFlag: "-no-tls11",
	},
	{
		name:        "TLS12",
		version:     VersionTLS12,
		excludeFlag: "-no-tls12",
		hasDTLS:     true,
		versionDTLS: VersionDTLS12,
	},
	{
		name:         "TLS13",
		version:      VersionTLS13,
		excludeFlag:  "-no-tls13",
		versionWire:  tls13DraftVersion,
		tls13Variant: TLS13Default,
	},
	{
		name:         "TLS13Experiment",
		version:      VersionTLS13,
		excludeFlag:  "-no-tls13",
		versionWire:  tls13ExperimentVersion,
		tls13Variant: TLS13Experiment,
	},
	{
		name:         "TLS13Experiment2",
		version:      VersionTLS13,
		excludeFlag:  "-no-tls13",
		versionWire:  tls13Experiment2Version,
		tls13Variant: TLS13Experiment2,
	},
	{
		name:         "TLS13RecordTypeExperiment",
		version:      VersionTLS13,
		excludeFlag:  "-no-tls13",
		versionWire:  tls13RecordTypeExperimentVersion,
		tls13Variant: TLS13RecordTypeExperiment,
	},
}

func allVersions(protocol protocol) []tlsVersion {
	if protocol == tls {
		return tlsVersions
	}

	var ret []tlsVersion
	for _, vers := range tlsVersions {
		if vers.hasDTLS {
			ret = append(ret, vers)
		}
	}
	return ret
}

type testCipherSuite struct {
	name string
	id   uint16
}

var testCipherSuites = []testCipherSuite{
	{"3DES-SHA", TLS_RSA_WITH_3DES_EDE_CBC_SHA},
	{"AES128-GCM", TLS_RSA_WITH_AES_128_GCM_SHA256},
	{"AES128-SHA", TLS_RSA_WITH_AES_128_CBC_SHA},
	{"AES128-SHA256", TLS_RSA_WITH_AES_128_CBC_SHA256},
	{"AES256-GCM", TLS_RSA_WITH_AES_256_GCM_SHA384},
	{"AES256-SHA", TLS_RSA_WITH_AES_256_CBC_SHA},
	{"AES256-SHA256", TLS_RSA_WITH_AES_256_CBC_SHA256},
	{"ECDHE-ECDSA-AES128-GCM", TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256},
	{"ECDHE-ECDSA-AES128-SHA", TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA},
	{"ECDHE-ECDSA-AES128-SHA256", TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256},
	{"ECDHE-ECDSA-AES256-GCM", TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384},
	{"ECDHE-ECDSA-AES256-SHA", TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA},
	{"ECDHE-ECDSA-AES256-SHA384", TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384},
	{"ECDHE-ECDSA-CHACHA20-POLY1305", TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256},
	{"ECDHE-RSA-AES128-GCM", TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256},
	{"ECDHE-RSA-AES128-SHA", TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA},
	{"ECDHE-RSA-AES128-SHA256", TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256},
	{"ECDHE-RSA-AES256-GCM", TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384},
	{"ECDHE-RSA-AES256-SHA", TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA},
	{"ECDHE-RSA-AES256-SHA384", TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384},
	{"ECDHE-RSA-CHACHA20-POLY1305", TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256},
	{"PSK-AES128-CBC-SHA", TLS_PSK_WITH_AES_128_CBC_SHA},
	{"PSK-AES256-CBC-SHA", TLS_PSK_WITH_AES_256_CBC_SHA},
	{"ECDHE-PSK-AES128-CBC-SHA", TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA},
	{"ECDHE-PSK-AES256-CBC-SHA", TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA},
	{"ECDHE-PSK-CHACHA20-POLY1305", TLS_ECDHE_PSK_WITH_CHACHA20_POLY1305_SHA256},
	{"AEAD-CHACHA20-POLY1305", TLS_CHACHA20_POLY1305_SHA256},
	{"AEAD-AES128-GCM-SHA256", TLS_AES_128_GCM_SHA256},
	{"AEAD-AES256-GCM-SHA384", TLS_AES_256_GCM_SHA384},
	{"NULL-SHA", TLS_RSA_WITH_NULL_SHA},
}

func hasComponent(suiteName, component string) bool {
	return strings.Contains("-"+suiteName+"-", "-"+component+"-")
}

func isTLS12Only(suiteName string) bool {
	return hasComponent(suiteName, "GCM") ||
		hasComponent(suiteName, "SHA256") ||
		hasComponent(suiteName, "SHA384") ||
		hasComponent(suiteName, "POLY1305")
}

func isTLS13Suite(suiteName string) bool {
	return strings.HasPrefix(suiteName, "AEAD-")
}

func isDTLSCipher(suiteName string) bool {
	return !hasComponent(suiteName, "RC4") && !hasComponent(suiteName, "NULL")
}

func bigFromHex(hex string) *big.Int {
	ret, ok := new(big.Int).SetString(hex, 16)
	if !ok {
		panic("failed to parse hex number 0x" + hex)
	}
	return ret
}

func addBasicTests() {
	basicTests := []testCase{
		{
			name: "NoFallbackSCSV",
			config: Config{
				Bugs: ProtocolBugs{
					FailIfNotFallbackSCSV: true,
				},
			},
			shouldFail:         true,
			expectedLocalError: "no fallback SCSV found",
		},
		{
			name: "SendFallbackSCSV",
			config: Config{
				Bugs: ProtocolBugs{
					FailIfNotFallbackSCSV: true,
				},
			},
			flags: []string{"-fallback-scsv"},
		},
		{
			name: "ClientCertificateTypes",
			config: Config{
				MaxVersion: VersionTLS12,
				ClientAuth: RequestClientCert,
				ClientCertificateTypes: []byte{
					CertTypeDSSSign,
					CertTypeRSASign,
					CertTypeECDSASign,
				},
			},
			flags: []string{
				"-expect-certificate-types",
				base64.StdEncoding.EncodeToString([]byte{
					CertTypeDSSSign,
					CertTypeRSASign,
					CertTypeECDSASign,
				}),
			},
		},
		{
			name: "UnauthenticatedECDH",
			config: Config{
				MaxVersion:   VersionTLS12,
				CipherSuites: []uint16{TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256},
				Bugs: ProtocolBugs{
					UnauthenticatedECDH: true,
				},
			},
			shouldFail:    true,
			expectedError: ":UNEXPECTED_MESSAGE:",
		},
		{
			name: "SkipCertificateStatus",
			config: Config{
				MaxVersion:   VersionTLS12,
				CipherSuites: []uint16{TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256},
				Bugs: ProtocolBugs{
					SkipCertificateStatus: true,
				},
			},
			flags: []string{
				"-enable-ocsp-stapling",
				// This test involves an optional message. Test the message callback
				// trace to ensure we do not miss or double-report any.
				"-expect-msg-callback",
				`write hs 1
read hs 2
read hs 11
read hs 12
read hs 14
write hs 16
write ccs
write hs 20
read hs 4
read ccs
read hs 20
read alert 1 0
`,
			},
		},
		{
			protocol: dtls,
			name:     "SkipCertificateStatus-DTLS",
			config: Config{
				MaxVersion:   VersionTLS12,
				CipherSuites: []uint16{TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256},
				Bugs: ProtocolBugs{
					SkipCertificateStatus: true,
				},
			},
			flags: []string{
				"-enable-ocsp-stapling",
				// This test involves an optional message. Test the message callback
				// trace to ensure we do not miss or double-report any.
				"-expect-msg-callback",
				`write hs 1
read hs 3
write hs 1
read hs 2
read hs 11
read hs 12
read hs 14
write hs 16
write ccs
write hs 20
read hs 4
read ccs
read hs 20
read alert 1 0
`,
			},
		},
		{
			name: "SkipServerKeyExchange",
			config: Config{
				MaxVersion:   VersionTLS12,
				CipherSuites: []uint16{TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256},
				Bugs: ProtocolBugs{
					SkipServerKeyExchange: true,
				},
			},
			shouldFail:    true,
			expectedError: ":UNEXPECTED_MESSAGE:",
		},
		{
			testType: serverTest,
			name:     "ServerSkipCertificateVerify",
			config: Config{
				MaxVersion:   VersionTLS12,
				Certificates: []Certificate{rsaChainCertificate},
				Bugs: ProtocolBugs{
					SkipCertificateVerify: true,
				},
			},
			expectPeerCertificate: &rsaChainCertificate,
			flags: []string{
				"-require-any-client-certificate",
			},
			shouldFail:         true,
			expectedError:      ":UNEXPECTED_RECORD:",
			expectedLocalError: "remote error: unexpected message",
		},
		{
			testType: serverTest,
			name:     "Alert",
			config: Config{
				Bugs: ProtocolBugs{
					SendSpuriousAlert: alertRecordOverflow,
				},
			},
			shouldFail:    true,
			expectedError: ":TLSV1_ALERT_RECORD_OVERFLOW:",
		},
		{
			protocol: dtls,
			testType: serverTest,
			name:     "Alert-DTLS",
			config: Config{
				Bugs: ProtocolBugs{
					SendSpuriousAlert: alertRecordOverflow,
				},
			},
			shouldFail:    true,
			expectedError: ":TLSV1_ALERT_RECORD_OVERFLOW:",
		},
		{
			testType: serverTest,
			name:     "FragmentAlert",
			config: Config{
				Bugs: ProtocolBugs{
					FragmentAlert:     true,
					SendSpuriousAlert: alertRecordOverflow,
				},
			},
			shouldFail:    true,
			expectedError: ":BAD_ALERT:",
		},
		{
			protocol: dtls,
			testType: serverTest,
			name:     "FragmentAlert-DTLS",
			config: Config{
				Bugs: ProtocolBugs{
					FragmentAlert:     true,
					SendSpuriousAlert: alertRecordOverflow,
				},
			},
			shouldFail:    true,
			expectedError: ":BAD_ALERT:",
		},
		{
			testType: serverTest,
			name:     "DoubleAlert",
			config: Config{
				Bugs: ProtocolBugs{
					DoubleAlert:       true,
					SendSpuriousAlert: alertRecordOverflow,
				},
			},
			shouldFail:    true,
			expectedError: ":BAD_ALERT:",
		},
		{
			protocol: dtls,
			testType: serverTest,
			name:     "DoubleAlert-DTLS",
			config: Config{
				Bugs: ProtocolBugs{
					DoubleAlert:       true,
					SendSpuriousAlert: alertRecordOverflow,
				},
			},
			shouldFail:    true,
			expectedError: ":BAD_ALERT:",
		},
		{
			name: "SkipNewSessionTicket",
			config: Config{
				MaxVersion: VersionTLS12,
				Bugs: ProtocolBugs{
					SkipNewSessionTicket: true,
				},
			},
			shouldFail:    true,
			expectedError: ":UNEXPECTED_RECORD:",
		},
		{
			testType: serverTest,
			name:     "FallbackSCSV",
			config: Config{
				MaxVersion: VersionTLS11,
				Bugs: ProtocolBugs{
					SendFallbackSCSV: true,
				},
			},
			shouldFail:         true,
			expectedError:      ":INAPPROPRIATE_FALLBACK:",
			expectedLocalError: "remote error: inappropriate fallback",
		},
		{
			testType: serverTest,
			name:     "FallbackSCSV-VersionMatch-TLS13",
			config: Config{
				MaxVersion: VersionTLS13,
				Bugs: ProtocolBugs{
					SendFallbackSCSV: true,
				},
			},
		},
		{
			testType: serverTest,
			name:     "FallbackSCSV-VersionMatch-TLS12",
			config: Config{
				MaxVersion: VersionTLS12,
				Bugs: ProtocolBugs{
					SendFallbackSCSV: true,
				},
			},
			flags: []string{"-max-version", strconv.Itoa(VersionTLS12)},
		},
		{
			testType: serverTest,
			name:     "FragmentedClientVersion",
			config: Config{
				Bugs: ProtocolBugs{
					MaxHandshakeRecordLength: 1,
					FragmentClientVersion:    true,
				},
			},
			expectedVersion: VersionTLS13,
		},
		{
			testType:      serverTest,
			name:          "HttpGET",
			sendPrefix:    "GET / HTTP/1.0\n",
			shouldFail:    true,
			expectedError: ":HTTP_REQUEST:",
		},
		{
			testType:      serverTest,
			name:          "HttpPOST",
			sendPrefix:    "POST / HTTP/1.0\n",
			shouldFail:    true,
			expectedError: ":HTTP_REQUEST:",
		},
		{
			testType:      serverTest,
			name:          "HttpHEAD",
			sendPrefix:    "HEAD / HTTP/1.0\n",
			shouldFail:    true,
			expectedError: ":HTTP_REQUEST:",
		},
		{
			testType:      serverTest,
			name:          "HttpPUT",
			sendPrefix:    "PUT / HTTP/1.0\n",
			shouldFail:    true,
			expectedError: ":HTTP_REQUEST:",
		},
		{
			testType:      serverTest,
			name:          "HttpCONNECT",
			sendPrefix:    "CONNECT www.google.com:443 HTTP/1.0\n",
			shouldFail:    true,
			expectedError: ":HTTPS_PROXY_REQUEST:",
		},
		{
			testType:      serverTest,
			name:          "Garbage",
			sendPrefix:    "blah",
			shouldFail:    true,
			expectedError: ":WRONG_VERSION_NUMBER:",
		},
		{
			name: "RSAEphemeralKey",
			config: Config{
				MaxVersion:   VersionTLS12,
				CipherSuites: []uint16{TLS_RSA_WITH_AES_128_CBC_SHA},
				Bugs: ProtocolBugs{
					RSAEphemeralKey: true,
				},
			},
			shouldFail:    true,
			expectedError: ":UNEXPECTED_MESSAGE:",
		},
		{
			name:          "DisableEverything",
			flags:         []string{"-no-tls13", "-no-tls12", "-no-tls11", "-no-tls1", "-no-ssl3"},
			shouldFail:    true,
			expectedError: ":NO_SUPPORTED_VERSIONS_ENABLED:",
		},
		{
			protocol:      dtls,
			name:          "DisableEverything-DTLS",
			flags:         []string{"-no-tls12", "-no-tls1"},
			shouldFail:    true,
			expectedError: ":NO_SUPPORTED_VERSIONS_ENABLED:",
		},
		{
			protocol: dtls,
			testType: serverTest,
			name:     "MTU",
			config: Config{
				Bugs: ProtocolBugs{
					MaxPacketLength: 256,
				},
			},
			flags: []string{"-mtu", "256"},
		},
		{
			protocol: dtls,
			testType: serverTest,
			name:     "MTUExceeded",
			config: Config{
				Bugs: ProtocolBugs{
					MaxPacketLength: 255,
				},
			},
			flags:              []string{"-mtu", "256"},
			shouldFail:         true,
			expectedLocalError: "dtls: exceeded maximum packet length",
		},
		{
			name: "EmptyCertificateList",
			config: Config{
				MaxVersion: VersionTLS12,
				Bugs: ProtocolBugs{
					EmptyCertificateList: true,
				},
			},
			shouldFail:    true,
			expectedError: ":DECODE_ERROR:",
		},
		{
			name: "EmptyCertificateList-TLS13",
			config: Config{
				MaxVersion: VersionTLS13,
				Bugs: ProtocolBugs{
					EmptyCertificateList: true,
				},
			},
			shouldFail:    true,
			expectedError: ":PEER_DID_NOT_RETURN_A_CERTIFICATE:",
		},
		{
			name:             "TLSFatalBadPackets",
			damageFirstWrite: true,
			shouldFail:       true,
			expectedError:    ":DECRYPTION_FAILED_OR_BAD_RECORD_MAC:",
		},
		{
			protocol:         dtls,
			name:             "DTLSIgnoreBadPackets",
			damageFirstWrite: true,
		},
		{
			protocol:         dtls,
			name:             "DTLSIgnoreBadPackets-Async",
			damageFirstWrite: true,
			flags:            []string{"-async"},
		},
		{
			name: "AppDataBeforeHandshake",
			config: Config{
				Bugs: ProtocolBugs{
					AppDataBeforeHandshake: []byte("TEST MESSAGE"),
				},
			},
			shouldFail:    true,
			expectedError: ":APPLICATION_DATA_INSTEAD_OF_HANDSHAKE:",
		},
		{
			name: "AppDataBeforeHandshake-Empty",
			config: Config{
				Bugs: ProtocolBugs{
					AppDataBeforeHandshake: []byte{},
				},
			},
			shouldFail:    true,
			expectedError: ":APPLICATION_DATA_INSTEAD_OF_HANDSHAKE:",
		},
		{
			protocol: dtls,
			name:     "AppDataBeforeHandshake-DTLS",
			config: Config{
				Bugs: ProtocolBugs{
					AppDataBeforeHandshake: []byte("TEST MESSAGE"),
				},
			},
			shouldFail:    true,
			expectedError: ":UNEXPECTED_RECORD:",
		},
		{
			protocol: dtls,
			name:     "AppDataBeforeHandshake-DTLS-Empty",
			config: Config{
				Bugs: ProtocolBugs{
					AppDataBeforeHandshake: []byte{},
				},
			},
			shouldFail:    true,
			expectedError: ":UNEXPECTED_RECORD:",
		},
		{
			name: "AppDataAfterChangeCipherSpec",
			config: Config{
				MaxVersion: VersionTLS12,
				Bugs: ProtocolBugs{
					AppDataAfterChangeCipherSpec: []byte("TEST MESSAGE"),
				},
			},
			shouldFail:    true,
			expectedError: ":UNEXPECTED_RECORD:",
		},
		{
			name: "AppDataAfterChangeCipherSpec-Empty",
			config: Config{
				MaxVersion: VersionTLS12,
				Bugs: ProtocolBugs{
					AppDataAfterChangeCipherSpec: []byte{},
				},
			},
			shouldFail:    true,
			expectedError: ":UNEXPECTED_RECORD:",
		},
		{
			protocol: dtls,
			name:     "AppDataAfterChangeCipherSpec-DTLS",
			config: Config{
				MaxVersion: VersionTLS12,
				Bugs: ProtocolBugs{
					AppDataAfterChangeCipherSpec: []byte("TEST MESSAGE"),
				},
			},
			// BoringSSL's DTLS implementation will drop the out-of-order
			// application data.
		},
		{
			protocol: dtls,
			name:     "AppDataAfterChangeCipherSpec-DTLS-Empty",
			config: Config{
				MaxVersion: VersionTLS12,
				Bugs: ProtocolBugs{
					AppDataAfterChangeCipherSpec: []byte{},
				},
			},
			// BoringSSL's DTLS implementation will drop the out-of-order
			// application data.
		},
		{
			name: "AlertAfterChangeCipherSpec",
			config: Config{
				MaxVersion: VersionTLS12,
				Bugs: ProtocolBugs{
					AlertAfterChangeCipherSpec: alertRecordOverflow,
				},
			},
			shouldFail:    true,
			expectedError: ":TLSV1_ALERT_RECORD_OVERFLOW:",
		},
		{
			protocol: dtls,
			name:     "AlertAfterChangeCipherSpec-DTLS",
			config: Config{
				MaxVersion: VersionTLS12,
				Bugs: ProtocolBugs{
					AlertAfterChangeCipherSpec: alertRecordOverflow,
				},
			},
			shouldFail:    true,
			expectedError: ":TLSV1_ALERT_RECORD_OVERFLOW:",
		},
		{
			protocol: dtls,
			name:     "ReorderHandshakeFragments-Small-DTLS",
			config: Config{
				Bugs: ProtocolBugs{
					ReorderHandshakeFragments: true,
					// Small enough that every handshake message is
					// fragmented.
					MaxHandshakeRecordLength: 2,
				},
			},
		},
		{
			protocol: dtls,
			name:     "ReorderHandshakeFragments-Large-DTLS",
			config: Config{
				Bugs: ProtocolBugs{
					ReorderHandshakeFragments: true,
					// Large enough that no handshake message is
					// fragmented.
					MaxHandshakeRecordLength: 2048,
				},
			},
		},
		{
			protocol: dtls,
			name:     "MixCompleteMessageWithFragments-DTLS",
			config: Config{
				Bugs: ProtocolBugs{
					ReorderHandshakeFragments:       true,
					MixCompleteMessageWithFragments: true,
					MaxHandshakeRecordLength:        2,
				},
			},
		},
		{
			name: "SendInvalidRecordType",
			config: Config{
				Bugs: ProtocolBugs{
					SendInvalidRecordType: true,
				},
			},
			shouldFail:    true,
			expectedError: ":UNEXPECTED_RECORD:",
		},
		{
			protocol: dtls,
			name:     "SendInvalidRecordType-DTLS",
			config: Config{
				Bugs: ProtocolBugs{
					SendInvalidRecordType: true,
				},
			},
			shouldFail:    true,
			expectedError: ":UNEXPECTED_RECORD:",
		},
		{
			name: "FalseStart-SkipServerSecondLeg",
			config: Config{
				MaxVersion:   VersionTLS12,
				CipherSuites: []uint16{TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256},
				NextProtos:   []string{"foo"},
				Bugs: ProtocolBugs{
					SkipNewSessionTicket: true,
					SkipChangeCipherSpec: true,
					SkipFinished:         true,
					ExpectFalseStart:     true,
				},
			},
			flags: []string{
				"-false-start",
				"-handshake-never-done",
				"-advertise-alpn", "\x03foo",
				"-expect-alpn", "foo",
			},
			shimWritesFirst: true,
			shouldFail:      true,
			expectedError:   ":APPLICATION_DATA_INSTEAD_OF_HANDSHAKE:",
		},
		{
			name: "FalseStart-SkipServerSecondLeg-Implicit",
			config: Config{
				MaxVersion:   VersionTLS12,
				CipherSuites: []uint16{TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256},
				NextProtos:   []string{"foo"},
				Bugs: ProtocolBugs{
					SkipNewSessionTicket: true,
					SkipChangeCipherSpec: true,
					SkipFinished:         true,
				},
			},
			flags: []string{
				"-implicit-handshake",
				"-false-start",
				"-handshake-never-done",
				"-advertise-alpn", "\x03foo",
			},
			shouldFail:    true,
			expectedError: ":APPLICATION_DATA_INSTEAD_OF_HANDSHAKE:",
		},
		{
			testType:           serverTest,
			name:               "FailEarlyCallback",
			flags:              []string{"-fail-early-callback"},
			shouldFail:         true,
			expectedError:      ":CONNECTION_REJECTED:",
			expectedLocalError: "remote error: handshake failure",
		},
		{
			name: "FailCertCallback-Client-TLS12",
			config: Config{
				MaxVersion: VersionTLS12,
				ClientAuth: RequestClientCert,
			},
			flags:              []string{"-fail-cert-callback"},
			shouldFail:         true,
			expectedError:      ":CERT_CB_ERROR:",
			expectedLocalError: "remote error: internal error",
		},
		{
			testType: serverTest,
			name:     "FailCertCallback-Server-TLS12",
			config: Config{
				MaxVersion: VersionTLS12,
			},
			flags:              []string{"-fail-cert-callback"},
			shouldFail:         true,
			expectedError:      ":CERT_CB_ERROR:",
			expectedLocalError: "remote error: internal error",
		},
		{
			name: "FailCertCallback-Client-TLS13",
			config: Config{
				MaxVersion: VersionTLS13,
				ClientAuth: RequestClientCert,
			},
			flags:              []string{"-fail-cert-callback"},
			shouldFail:         true,
			expectedError:      ":CERT_CB_ERROR:",
			expectedLocalError: "remote error: internal error",
		},
		{
			testType: serverTest,
			name:     "FailCertCallback-Server-TLS13",
			config: Config{
				MaxVersion: VersionTLS13,
			},
			flags:              []string{"-fail-cert-callback"},
			shouldFail:         true,
			expectedError:      ":CERT_CB_ERROR:",
			expectedLocalError: "remote error: internal error",
		},
		{
			protocol: dtls,
			name:     "FragmentMessageTypeMismatch-DTLS",
			config: Config{
				Bugs: ProtocolBugs{
					MaxHandshakeRecordLength:    2,
					FragmentMessageTypeMismatch: true,
				},
			},
			shouldFail:    true,
			expectedError: ":FRAGMENT_MISMATCH:",
		},
		{
			protocol: dtls,
			name:     "FragmentMessageLengthMismatch-DTLS",
			config: Config{
				Bugs: ProtocolBugs{
					MaxHandshakeRecordLength:      2,
					FragmentMessageLengthMismatch: true,
				},
			},
			shouldFail:    true,
			expectedError: ":FRAGMENT_MISMATCH:",
		},
		{
			protocol: dtls,
			name:     "SplitFragments-Header-DTLS",
			config: Config{
				Bugs: ProtocolBugs{
					SplitFragments: 2,
				},
			},
			shouldFail:    true,
			expectedError: ":BAD_HANDSHAKE_RECORD:",
		},
		{
			protocol: dtls,
			name:     "SplitFragments-Boundary-DTLS",
			config: Config{
				Bugs: ProtocolBugs{
					SplitFragments: dtlsRecordHeaderLen,
				},
			},
			shouldFail:    true,
			expectedError: ":BAD_HANDSHAKE_RECORD:",
		},
		{
			protocol: dtls,
			name:     "SplitFragments-Body-DTLS",
			config: Config{
				Bugs: ProtocolBugs{
					SplitFragments: dtlsRecordHeaderLen + 1,
				},
			},
			shouldFail:    true,
			expectedError: ":BAD_HANDSHAKE_RECORD:",
		},
		{
			protocol: dtls,
			name:     "SendEmptyFragments-DTLS",
			config: Config{
				Bugs: ProtocolBugs{
					SendEmptyFragments: true,
				},
			},
		},
		{
			testType: serverTest,
			protocol: dtls,
			name:     "SendEmptyFragments-Padded-DTLS",
			config: Config{
				Bugs: ProtocolBugs{
					// Test empty fragments for a message with a
					// nice power-of-two length.
					PadClientHello:     64,
					SendEmptyFragments: true,
				},
			},
		},
		{
			name: "BadFinished-Client",
			config: Config{
				MaxVersion: VersionTLS12,
				Bugs: ProtocolBugs{
					BadFinished: true,
				},
			},
			shouldFail:    true,
			expectedError: ":DIGEST_CHECK_FAILED:",
		},
		{
			name: "BadFinished-Client-TLS13",
			config: Config{
				MaxVersion: VersionTLS13,
				Bugs: ProtocolBugs{
					BadFinished: true,
				},
			},
			shouldFail:    true,
			expectedError: ":DIGEST_CHECK_FAILED:",
		},
		{
			testType: serverTest,
			name:     "BadFinished-Server",
			config: Config{
				MaxVersion: VersionTLS12,
				Bugs: ProtocolBugs{
					BadFinished: true,
				},
			},
			shouldFail:    true,
			expectedError: ":DIGEST_CHECK_FAILED:",
		},
		{
			testType: serverTest,
			name:     "BadFinished-Server-TLS13",
			config: Config{
				MaxVersion: VersionTLS13,
				Bugs: ProtocolBugs{
					BadFinished: true,
				},
			},
			shouldFail:    true,
			expectedError: ":DIGEST_CHECK_FAILED:",
		},
		{
			name: "FalseStart-BadFinished",
			config: Config{
				MaxVersion:   VersionTLS12,
				CipherSuites: []uint16{TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256},
				NextProtos:   []string{"foo"},
				Bugs: ProtocolBugs{
					BadFinished:      true,
					ExpectFalseStart: true,
				},
			},
			flags: []string{
				"-false-start",
				"-handshake-never-done",
				"-advertise-alpn", "\x03foo",
				"-expect-alpn", "foo",
			},
			shimWritesFirst: true,
			shouldFail:      true,
			expectedError:   ":DIGEST_CHECK_FAILED:",
		},
		{
			name: "NoFalseStart-NoALPN",
			config: Config{
				MaxVersion:   VersionTLS12,
				CipherSuites: []uint16{TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256},
				Bugs: ProtocolBugs{
					ExpectFalseStart:          true,
					AlertBeforeFalseStartTest: alertAccessDenied,
				},
			},
			flags: []string{
				"-false-start",
			},
			shimWritesFirst:    true,
			shouldFail:         true,
			expectedError:      ":TLSV1_ALERT_ACCESS_DENIED:",
			expectedLocalError: "tls: peer did not false start: EOF",
		},
		{
			name: "NoFalseStart-NoAEAD",
			config: Config{
				MaxVersion:   VersionTLS12,
				CipherSuites: []uint16{TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA},
				NextProtos:   []string{"foo"},
				Bugs: ProtocolBugs{
					ExpectFalseStart:          true,
					AlertBeforeFalseStartTest: alertAccessDenied,
				},
			},
			flags: []string{
				"-false-start",
				"-advertise-alpn", "\x03foo",
			},
			shimWritesFirst:    true,
			shouldFail:         true,
			expectedError:      ":TLSV1_ALERT_ACCESS_DENIED:",
			expectedLocalError: "tls: peer did not false start: EOF",
		},
		{
			name: "NoFalseStart-RSA",
			config: Config{
				MaxVersion:   VersionTLS12,
				CipherSuites: []uint16{TLS_RSA_WITH_AES_128_GCM_SHA256},
				NextProtos:   []string{"foo"},
				Bugs: ProtocolBugs{
					ExpectFalseStart:          true,
					AlertBeforeFalseStartTest: alertAccessDenied,
				},
			},
			flags: []string{
				"-false-start",
				"-advertise-alpn", "\x03foo",
			},
			shimWritesFirst:    true,
			shouldFail:         true,
			expectedError:      ":TLSV1_ALERT_ACCESS_DENIED:",
			expectedLocalError: "tls: peer did not false start: EOF",
		},
		{
			protocol: dtls,
			name:     "SendSplitAlert-Sync",
			config: Config{
				Bugs: ProtocolBugs{
					SendSplitAlert: true,
				},
			},
		},
		{
			protocol: dtls,
			name:     "SendSplitAlert-Async",
			config: Config{
				Bugs: ProtocolBugs{
					SendSplitAlert: true,
				},
			},
			flags: []string{"-async"},
		},
		{
			protocol: dtls,
			name:     "PackDTLSHandshake",
			config: Config{
				Bugs: ProtocolBugs{
					MaxHandshakeRecordLength: 2,
					PackHandshakeFragments:   20,
					PackHandshakeRecords:     200,
				},
			},
		},
		{
			name:             "SendEmptyRecords-Pass",
			sendEmptyRecords: 32,
		},
		{
			name:             "SendEmptyRecords",
			sendEmptyRecords: 33,
			shouldFail:       true,
			expectedError:    ":TOO_MANY_EMPTY_FRAGMENTS:",
		},
		{
			name:             "SendEmptyRecords-Async",
			sendEmptyRecords: 33,
			flags:            []string{"-async"},
			shouldFail:       true,
			expectedError:    ":TOO_MANY_EMPTY_FRAGMENTS:",
		},
		{
			name: "SendWarningAlerts-Pass",
			config: Config{
				MaxVersion: VersionTLS12,
			},
			sendWarningAlerts: 4,
		},
		{
			protocol: dtls,
			name:     "SendWarningAlerts-DTLS-Pass",
			config: Config{
				MaxVersion: VersionTLS12,
			},
			sendWarningAlerts: 4,
		},
		{
			name: "SendWarningAlerts-TLS13",
			config: Config{
				MaxVersion: VersionTLS13,
			},
			sendWarningAlerts:  4,
			shouldFail:         true,
			expectedError:      ":BAD_ALERT:",
			expectedLocalError: "remote error: error decoding message",
		},
		{
			name: "SendWarningAlerts",
			config: Config{
				MaxVersion: VersionTLS12,
			},
			sendWarningAlerts: 5,
			shouldFail:        true,
			expectedError:     ":TOO_MANY_WARNING_ALERTS:",
		},
		{
			name: "SendWarningAlerts-Async",
			config: Config{
				MaxVersion: VersionTLS12,
			},
			sendWarningAlerts: 5,
			flags:             []string{"-async"},
			shouldFail:        true,
			expectedError:     ":TOO_MANY_WARNING_ALERTS:",
		},
		{
			name:               "SendBogusAlertType",
			sendBogusAlertType: true,
			shouldFail:         true,
			expectedError:      ":UNKNOWN_ALERT_TYPE:",
			expectedLocalError: "remote error: illegal parameter",
		},
		{
			protocol:           dtls,
			name:               "SendBogusAlertType-DTLS",
			sendBogusAlertType: true,
			shouldFail:         true,
			expectedError:      ":UNKNOWN_ALERT_TYPE:",
			expectedLocalError: "remote error: illegal parameter",
		},
		{
			name: "TooManyKeyUpdates",
			config: Config{
				MaxVersion: VersionTLS13,
			},
			sendKeyUpdates:   33,
			keyUpdateRequest: keyUpdateNotRequested,
			shouldFail:       true,
			expectedError:    ":TOO_MANY_KEY_UPDATES:",
		},
		{
			name: "EmptySessionID",
			config: Config{
				MaxVersion:             VersionTLS12,
				SessionTicketsDisabled: true,
			},
			noSessionCache: true,
			flags:          []string{"-expect-no-session"},
		},
		{
			name: "Unclean-Shutdown",
			config: Config{
				Bugs: ProtocolBugs{
					NoCloseNotify:     true,
					ExpectCloseNotify: true,
				},
			},
			shimShutsDown: true,
			flags:         []string{"-check-close-notify"},
			shouldFail:    true,
			expectedError: "Unexpected SSL_shutdown result: -1 != 1",
		},
		{
			name: "Unclean-Shutdown-Ignored",
			config: Config{
				Bugs: ProtocolBugs{
					NoCloseNotify: true,
				},
			},
			shimShutsDown: true,
		},
		{
			name: "Unclean-Shutdown-Alert",
			config: Config{
				Bugs: ProtocolBugs{
					SendAlertOnShutdown: alertDecompressionFailure,
					ExpectCloseNotify:   true,
				},
			},
			shimShutsDown: true,
			flags:         []string{"-check-close-notify"},
			shouldFail:    true,
			expectedError: ":SSLV3_ALERT_DECOMPRESSION_FAILURE:",
		},
		{
			name: "LargePlaintext",
			config: Config{
				Bugs: ProtocolBugs{
					SendLargeRecords: true,
				},
			},
			messageLen:    maxPlaintext + 1,
			shouldFail:    true,
			expectedError: ":DATA_LENGTH_TOO_LONG:",
		},
		{
			protocol: dtls,
			name:     "LargePlaintext-DTLS",
			config: Config{
				Bugs: ProtocolBugs{
					SendLargeRecords: true,
				},
			},
			messageLen:    maxPlaintext + 1,
			shouldFail:    true,
			expectedError: ":DATA_LENGTH_TOO_LONG:",
		},
		{
			name: "LargeCiphertext",
			config: Config{
				Bugs: ProtocolBugs{
					SendLargeRecords: true,
				},
			},
			messageLen:    maxPlaintext * 2,
			shouldFail:    true,
			expectedError: ":ENCRYPTED_LENGTH_TOO_LONG:",
		},
		{
			protocol: dtls,
			name:     "LargeCiphertext-DTLS",
			config: Config{
				Bugs: ProtocolBugs{
					SendLargeRecords: true,
				},
			},
			messageLen: maxPlaintext * 2,
			// Unlike the other four cases, DTLS drops records which
			// are invalid before authentication, so the connection
			// does not fail.
			expectMessageDropped: true,
		},
		{
			name:        "BadHelloRequest-1",
			renegotiate: 1,
			config: Config{
				MaxVersion: VersionTLS12,
				Bugs: ProtocolBugs{
					BadHelloRequest: []byte{typeHelloRequest, 0, 0, 1, 1},
				},
			},
			flags: []string{
				"-renegotiate-freely",
				"-expect-total-renegotiations", "1",
			},
			shouldFail:    true,
			expectedError: ":EXCESSIVE_MESSAGE_SIZE:",
		},
		{
			name:        "BadHelloRequest-2",
			renegotiate: 1,
			config: Config{
				MaxVersion: VersionTLS12,
				Bugs: ProtocolBugs{
					BadHelloRequest: []byte{typeServerKeyExchange, 0, 0, 0},
				},
			},
			flags: []string{
				"-renegotiate-freely",
				"-expect-total-renegotiations", "1",
			},
			shouldFail:    true,
			expectedError: ":BAD_HELLO_REQUEST:",
		},
		{
			testType: serverTest,
			name:     "SupportTicketsWithSessionID",
			config: Config{
				MaxVersion:             VersionTLS12,
				SessionTicketsDisabled: true,
			},
			resumeConfig: &Config{
				MaxVersion: VersionTLS12,
			},
			resumeSession: true,
		},
		{
			protocol: dtls,
			name:     "DTLS-SendExtraFinished",
			config: Config{
				Bugs: ProtocolBugs{
					SendExtraFinished: true,
				},
			},
			shouldFail:    true,
			expectedError: ":UNEXPECTED_RECORD:",
		},
		{
			protocol: dtls,
			name:     "DTLS-SendExtraFinished-Reordered",
			config: Config{
				Bugs: ProtocolBugs{
					MaxHandshakeRecordLength:  2,
					ReorderHandshakeFragments: true,
					SendExtraFinished:         true,
				},
			},
			shouldFail:    true,
			expectedError: ":UNEXPECTED_RECORD:",
		},
		{
			testType: serverTest,
			name:     "V2ClientHello-EmptyRecordPrefix",
			config: Config{
				// Choose a cipher suite that does not involve
				// elliptic curves, so no extensions are
				// involved.
				MaxVersion:   VersionTLS12,
				CipherSuites: []uint16{TLS_RSA_WITH_3DES_EDE_CBC_SHA},
				Bugs: ProtocolBugs{
					SendV2ClientHello: true,
				},
			},
			sendPrefix: string([]byte{
				byte(recordTypeHandshake),
				3, 1, // version
				0, 0, // length
			}),
			// A no-op empty record may not be sent before V2ClientHello.
			shouldFail:    true,
			expectedError: ":WRONG_VERSION_NUMBER:",
		},
		{
			testType: serverTest,
			name:     "V2ClientHello-WarningAlertPrefix",
			config: Config{
				// Choose a cipher suite that does not involve
				// elliptic curves, so no extensions are
				// involved.
				MaxVersion:   VersionTLS12,
				CipherSuites: []uint16{TLS_RSA_WITH_3DES_EDE_CBC_SHA},
				Bugs: ProtocolBugs{
					SendV2ClientHello: true,
				},
			},
			sendPrefix: string([]byte{
				byte(recordTypeAlert),
				3, 1, // version
				0, 2, // length
				alertLevelWarning, byte(alertDecompressionFailure),
			}),
			// A no-op warning alert may not be sent before V2ClientHello.
			shouldFail:    true,
			expectedError: ":WRONG_VERSION_NUMBER:",
		},
		{
			name: "KeyUpdate-Client",
			config: Config{
				MaxVersion: VersionTLS13,
			},
			sendKeyUpdates:   1,
			keyUpdateRequest: keyUpdateNotRequested,
		},
		{
			testType: serverTest,
			name:     "KeyUpdate-Server",
			config: Config{
				MaxVersion: VersionTLS13,
			},
			sendKeyUpdates:   1,
			keyUpdateRequest: keyUpdateNotRequested,
		},
		{
			name: "KeyUpdate-InvalidRequestMode",
			config: Config{
				MaxVersion: VersionTLS13,
			},
			sendKeyUpdates:   1,
			keyUpdateRequest: 42,
			shouldFail:       true,
			expectedError:    ":DECODE_ERROR:",
		},
		{
			// Test that KeyUpdates are acknowledged properly.
			name: "KeyUpdate-RequestACK",
			config: Config{
				MaxVersion: VersionTLS13,
				Bugs: ProtocolBugs{
					RejectUnsolicitedKeyUpdate: true,
				},
			},
			// Test the shim receiving many KeyUpdates in a row.
			sendKeyUpdates:   5,
			messageCount:     5,
			keyUpdateRequest: keyUpdateRequested,
		},
		{
			// Test that KeyUpdates are acknowledged properly if the
			// peer's KeyUpdate is discovered while a write is
			// pending.
			name: "KeyUpdate-RequestACK-UnfinishedWrite",
			config: Config{
				MaxVersion: VersionTLS13,
				Bugs: ProtocolBugs{
					RejectUnsolicitedKeyUpdate: true,
				},
			},
			// Test the shim receiving many KeyUpdates in a row.
			sendKeyUpdates:          5,
			messageCount:            5,
			keyUpdateRequest:        keyUpdateRequested,
			readWithUnfinishedWrite: true,
			flags: []string{"-async"},
		},
		{
			name: "SendSNIWarningAlert",
			config: Config{
				MaxVersion: VersionTLS12,
				Bugs: ProtocolBugs{
					SendSNIWarningAlert: true,
				},
			},
		},
		{
			testType: serverTest,
			name:     "ExtraCompressionMethods-TLS12",
			config: Config{
				MaxVersion: VersionTLS12,
				Bugs: ProtocolBugs{
					SendCompressionMethods: []byte{1, 2, 3, compressionNone, 4, 5, 6},
				},
			},
		},
		{
			testType: serverTest,
			name:     "ExtraCompressionMethods-TLS13",
			config: Config{
				MaxVersion: VersionTLS13,
				Bugs: ProtocolBugs{
					SendCompressionMethods: []byte{1, 2, 3, compressionNone, 4, 5, 6},
				},
			},
			shouldFail:         true,
			expectedError:      ":INVALID_COMPRESSION_LIST:",
			expectedLocalError: "remote error: illegal parameter",
		},
		{
			testType: serverTest,
			name:     "NoNullCompression-TLS12",
			config: Config{
				MaxVersion: VersionTLS12,
				Bugs: ProtocolBugs{
					SendCompressionMethods: []byte{1, 2, 3, 4, 5, 6},
				},
			},
			shouldFail:         true,
			expectedError:      ":INVALID_COMPRESSION_LIST:",
			expectedLocalError: "remote error: illegal parameter",
		},
		{
			testType: serverTest,
			name:     "NoNullCompression-TLS13",
			config: Config{
				MaxVersion: VersionTLS13,
				Bugs: ProtocolBugs{
					SendCompressionMethods: []byte{1, 2, 3, 4, 5, 6},
				},
			},
			shouldFail:         true,
			expectedError:      ":INVALID_COMPRESSION_LIST:",
			expectedLocalError: "remote error: illegal parameter",
		},
		// Test that the client rejects invalid compression methods
		// from the server.
		{
			testType: clientTest,
			name:     "InvalidCompressionMethod",
			config: Config{
				MaxVersion: VersionTLS12,
				Bugs: ProtocolBugs{
					SendCompressionMethod: 1,
				},
			},
			shouldFail:         true,
			expectedError:      ":UNSUPPORTED_COMPRESSION_ALGORITHM:",
			expectedLocalError: "remote error: illegal parameter",
		},
		{
			name: "GREASE-Client-TLS12",
			config: Config{
				MaxVersion: VersionTLS12,
				Bugs: ProtocolBugs{
					ExpectGREASE: true,
				},
			},
			flags: []string{"-enable-grease"},
		},
		{
			name: "GREASE-Client-TLS13",
			config: Config{
				MaxVersion: VersionTLS13,
				Bugs: ProtocolBugs{
					ExpectGREASE: true,
				},
			},
			flags: []string{"-enable-grease"},
		},
		{
			testType: serverTest,
			name:     "GREASE-Server-TLS13",
			config: Config{
				MaxVersion: VersionTLS13,
				Bugs: ProtocolBugs{
					// TLS 1.3 servers are expected to
					// always enable GREASE. TLS 1.3 is new,
					// so there is no existing ecosystem to
					// worry about.
					ExpectGREASE: true,
				},
			},
		},
		{
			// Test the server so there is a large certificate as
			// well as application data.
			testType: serverTest,
			name:     "MaxSendFragment",
			config: Config{
				Bugs: ProtocolBugs{
					MaxReceivePlaintext: 512,
				},
			},
			messageLen: 1024,
			flags: []string{
				"-max-send-fragment", "512",
				"-read-size", "1024",
			},
		},
		{
			// Test the server so there is a large certificate as
			// well as application data.
			testType: serverTest,
			name:     "MaxSendFragment-TooLarge",
			config: Config{
				Bugs: ProtocolBugs{
					// Ensure that some of the records are
					// 512.
					MaxReceivePlaintext: 511,
				},
			},
			messageLen: 1024,
			flags: []string{
				"-max-send-fragment", "512",
				"-read-size", "1024",
			},
			shouldFail:         true,
			expectedLocalError: "local error: record overflow",
		},
		{
			// Test that Java-like ClientHellos are provided session
			// IDs but resumption is always declined. This is to
			// workaround a bug that causes connection failures when
			// certificates rotate.
			testType: serverTest,
			name:     "JavaWorkaround",
			config: Config{
				MaxVersion:             VersionTLS12,
				CurvePreferences:       []CurveID{CurveP256, CurveP384, CurveP521},
				SessionTicketsDisabled: true,
				Bugs: ProtocolBugs{
					SendOnlyECExtensions: true,
				},
			},
			flags:                []string{"-expect-session-id"},
			resumeSession:        true,
			expectResumeRejected: true,
		},
	}
	testCases = append(testCases, basicTests...)

	// Test that very large messages can be received.
	cert := rsaCertificate
	for i := 0; i < 50; i++ {
		cert.Certificate = append(cert.Certificate, cert.Certificate[0])
	}
	testCases = append(testCases, testCase{
		name: "LargeMessage",
		config: Config{
			Certificates: []Certificate{cert},
		},
	})
	testCases = append(testCases, testCase{
		protocol: dtls,
		name:     "LargeMessage-DTLS",
		config: Config{
			Certificates: []Certificate{cert},
		},
	})

	// They are rejected if the maximum certificate chain length is capped.
	testCases = append(testCases, testCase{
		name: "LargeMessage-Reject",
		config: Config{
			Certificates: []Certificate{cert},
		},
		flags:         []string{"-max-cert-list", "16384"},
		shouldFail:    true,
		expectedError: ":EXCESSIVE_MESSAGE_SIZE:",
	})
	testCases = append(testCases, testCase{
		protocol: dtls,
		name:     "LargeMessage-Reject-DTLS",
		config: Config{
			Certificates: []Certificate{cert},
		},
		flags:         []string{"-max-cert-list", "16384"},
		shouldFail:    true,
		expectedError: ":EXCESSIVE_MESSAGE_SIZE:",
	})
}

func addTestForCipherSuite(suite testCipherSuite, ver tlsVersion, protocol protocol) {
	const psk = "12345"
	const pskIdentity = "luggage combo"

	var prefix string
	if protocol == dtls {
		if !ver.hasDTLS {
			return
		}
		prefix = "D"
	}

	var cert Certificate
	var certFile string
	var keyFile string
	if hasComponent(suite.name, "ECDSA") {
		cert = ecdsaP256Certificate
		certFile = ecdsaP256CertificateFile
		keyFile = ecdsaP256KeyFile
	} else {
		cert = rsaCertificate
		certFile = rsaCertificateFile
		keyFile = rsaKeyFile
	}

	var flags []string
	if hasComponent(suite.name, "PSK") {
		flags = append(flags,
			"-psk", psk,
			"-psk-identity", pskIdentity)
	}
	if hasComponent(suite.name, "NULL") {
		// NULL ciphers must be explicitly enabled.
		flags = append(flags, "-cipher", "DEFAULT:NULL-SHA")
	}

	var shouldServerFail, shouldClientFail bool
	if hasComponent(suite.name, "ECDHE") && ver.version == VersionSSL30 {
		// BoringSSL clients accept ECDHE on SSLv3, but
		// a BoringSSL server will never select it
		// because the extension is missing.
		shouldServerFail = true
	}
	if isTLS12Only(suite.name) && ver.version < VersionTLS12 {
		shouldClientFail = true
		shouldServerFail = true
	}
	if !isTLS13Suite(suite.name) && ver.version >= VersionTLS13 {
		shouldClientFail = true
		shouldServerFail = true
	}
	if isTLS13Suite(suite.name) && ver.version < VersionTLS13 {
		shouldClientFail = true
		shouldServerFail = true
	}
	if !isDTLSCipher(suite.name) && protocol == dtls {
		shouldClientFail = true
		shouldServerFail = true
	}

	var sendCipherSuite uint16
	var expectedServerError, expectedClientError string
	serverCipherSuites := []uint16{suite.id}
	if shouldServerFail {
		expectedServerError = ":NO_SHARED_CIPHER:"
	}
	if shouldClientFail {
		expectedClientError = ":WRONG_CIPHER_RETURNED:"
		// Configure the server to select ciphers as normal but
		// select an incompatible cipher in ServerHello.
		serverCipherSuites = nil
		sendCipherSuite = suite.id
	}

	// For cipher suites and versions where exporters are defined, verify
	// that they interoperate.
	var exportKeyingMaterial int
	if ver.version > VersionSSL30 {
		exportKeyingMaterial = 1024
	}

	testCases = append(testCases, testCase{
		testType: serverTest,
		protocol: protocol,
		name:     prefix + ver.name + "-" + suite.name + "-server",
		config: Config{
			MinVersion:           ver.version,
			MaxVersion:           ver.version,
			CipherSuites:         []uint16{suite.id},
			Certificates:         []Certificate{cert},
			PreSharedKey:         []byte(psk),
			PreSharedKeyIdentity: pskIdentity,
			Bugs: ProtocolBugs{
				AdvertiseAllConfiguredCiphers: true,
			},
		},
		tls13Variant:         ver.tls13Variant,
		certFile:             certFile,
		keyFile:              keyFile,
		flags:                flags,
		resumeSession:        true,
		shouldFail:           shouldServerFail,
		expectedError:        expectedServerError,
		exportKeyingMaterial: exportKeyingMaterial,
	})

	testCases = append(testCases, testCase{
		testType: clientTest,
		protocol: protocol,
		name:     prefix + ver.name + "-" + suite.name + "-client",
		config: Config{
			MinVersion:           ver.version,
			MaxVersion:           ver.version,
			CipherSuites:         serverCipherSuites,
			Certificates:         []Certificate{cert},
			PreSharedKey:         []byte(psk),
			PreSharedKeyIdentity: pskIdentity,
			Bugs: ProtocolBugs{
				IgnorePeerCipherPreferences: shouldClientFail,
				SendCipherSuite:             sendCipherSuite,
			},
		},
		tls13Variant:         ver.tls13Variant,
		flags:                flags,
		resumeSession:        true,
		shouldFail:           shouldClientFail,
		expectedError:        expectedClientError,
		exportKeyingMaterial: exportKeyingMaterial,
	})

	if shouldClientFail {
		return
	}

	// Ensure the maximum record size is accepted.
	testCases = append(testCases, testCase{
		protocol: protocol,
		name:     prefix + ver.name + "-" + suite.name + "-LargeRecord",
		config: Config{
			MinVersion:           ver.version,
			MaxVersion:           ver.version,
			CipherSuites:         []uint16{suite.id},
			Certificates:         []Certificate{cert},
			PreSharedKey:         []byte(psk),
			PreSharedKeyIdentity: pskIdentity,
		},
		tls13Variant: ver.tls13Variant,
		flags:        flags,
		messageLen:   maxPlaintext,
	})

	// Test bad records for all ciphers. Bad records are fatal in TLS
	// and ignored in DTLS.
	var shouldFail bool
	var expectedError string
	if protocol == tls {
		shouldFail = true
		expectedError = ":DECRYPTION_FAILED_OR_BAD_RECORD_MAC:"
	}

	testCases = append(testCases, testCase{
		protocol: protocol,
		name:     prefix + ver.name + "-" + suite.name + "-BadRecord",
		config: Config{
			MinVersion:           ver.version,
			MaxVersion:           ver.version,
			CipherSuites:         []uint16{suite.id},
			Certificates:         []Certificate{cert},
			PreSharedKey:         []byte(psk),
			PreSharedKeyIdentity: pskIdentity,
		},
		tls13Variant:     ver.tls13Variant,
		flags:            flags,
		damageFirstWrite: true,
		messageLen:       maxPlaintext,
		shouldFail:       shouldFail,
		expectedError:    expectedError,
	})
}

func addCipherSuiteTests() {
	const bogusCipher = 0xfe00

	for _, suite := range testCipherSuites {
		for _, ver := range tlsVersions {
			for _, protocol := range []protocol{tls, dtls} {
				addTestForCipherSuite(suite, ver, protocol)
			}
		}
	}

	testCases = append(testCases, testCase{
		name: "NoSharedCipher",
		config: Config{
			MaxVersion:   VersionTLS12,
			CipherSuites: []uint16{},
		},
		shouldFail:    true,
		expectedError: ":HANDSHAKE_FAILURE_ON_CLIENT_HELLO:",
	})

	testCases = append(testCases, testCase{
		name: "NoSharedCipher-TLS13",
		config: Config{
			MaxVersion:   VersionTLS13,
			CipherSuites: []uint16{},
		},
		shouldFail:    true,
		expectedError: ":HANDSHAKE_FAILURE_ON_CLIENT_HELLO:",
	})

	testCases = append(testCases, testCase{
		name: "UnsupportedCipherSuite",
		config: Config{
			MaxVersion:   VersionTLS12,
			CipherSuites: []uint16{TLS_RSA_WITH_AES_128_CBC_SHA},
			Bugs: ProtocolBugs{
				IgnorePeerCipherPreferences: true,
			},
		},
		flags:         []string{"-cipher", "DEFAULT:!AES"},
		shouldFail:    true,
		expectedError: ":WRONG_CIPHER_RETURNED:",
	})

	testCases = append(testCases, testCase{
		name: "ServerHelloBogusCipher",
		config: Config{
			MaxVersion: VersionTLS12,
			Bugs: ProtocolBugs{
				SendCipherSuite: bogusCipher,
			},
		},
		shouldFail:    true,
		expectedError: ":UNKNOWN_CIPHER_RETURNED:",
	})
	testCases = append(testCases, testCase{
		name: "ServerHelloBogusCipher-TLS13",
		config: Config{
			MaxVersion: VersionTLS13,
			Bugs: ProtocolBugs{
				SendCipherSuite: bogusCipher,
			},
		},
		shouldFail:    true,
		expectedError: ":UNKNOWN_CIPHER_RETURNED:",
	})

	// The server must be tolerant to bogus ciphers.
	testCases = append(testCases, testCase{
		testType: serverTest,
		name:     "UnknownCipher",
		config: Config{
			MaxVersion:   VersionTLS12,
			CipherSuites: []uint16{bogusCipher, TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256},
			Bugs: ProtocolBugs{
				AdvertiseAllConfiguredCiphers: true,
			},
		},
	})

	// The server must be tolerant to bogus ciphers.
	testCases = append(testCases, testCase{
		testType: serverTest,
		name:     "UnknownCipher-TLS13",
		config: Config{
			MaxVersion:   VersionTLS13,
			CipherSuites: []uint16{bogusCipher, TLS_AES_128_GCM_SHA256},
			Bugs: ProtocolBugs{
				AdvertiseAllConfiguredCiphers: true,
			},
		},
	})

	// Test empty ECDHE_PSK identity hints work as expected.
	testCases = append(testCases, testCase{
		name: "EmptyECDHEPSKHint",
		config: Config{
			MaxVersion:   VersionTLS12,
			CipherSuites: []uint16{TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA},
			PreSharedKey: []byte("secret"),
		},
		flags: []string{"-psk", "secret"},
	})

	// Test empty PSK identity hints work as expected, even if an explicit
	// ServerKeyExchange is sent.
	testCases = append(testCases, testCase{
		name: "ExplicitEmptyPSKHint",
		config: Config{
			MaxVersion:   VersionTLS12,
			CipherSuites: []uint16{TLS_PSK_WITH_AES_128_CBC_SHA},
			PreSharedKey: []byte("secret"),
			Bugs: ProtocolBugs{
				AlwaysSendPreSharedKeyIdentityHint: true,
			},
		},
		flags: []string{"-psk", "secret"},
	})

	// Test that clients enforce that the server-sent certificate and cipher
	// suite match in TLS 1.2.
	testCases = append(testCases, testCase{
		name: "CertificateCipherMismatch-RSA",
		config: Config{
			MaxVersion:   VersionTLS12,
			CipherSuites: []uint16{TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256},
			Certificates: []Certificate{rsaCertificate},
			Bugs: ProtocolBugs{
				SendCipherSuite: TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
			},
		},
		shouldFail:    true,
		expectedError: ":WRONG_CERTIFICATE_TYPE:",
	})
	testCases = append(testCases, testCase{
		name: "CertificateCipherMismatch-ECDSA",
		config: Config{
			MaxVersion:   VersionTLS12,
			CipherSuites: []uint16{TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256},
			Certificates: []Certificate{ecdsaP256Certificate},
			Bugs: ProtocolBugs{
				SendCipherSuite: TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
			},
		},
		shouldFail:    true,
		expectedError: ":WRONG_CERTIFICATE_TYPE:",
	})
	testCases = append(testCases, testCase{
		name: "CertificateCipherMismatch-Ed25519",
		config: Config{
			MaxVersion:   VersionTLS12,
			CipherSuites: []uint16{TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256},
			Certificates: []Certificate{ed25519Certificate},
			Bugs: ProtocolBugs{
				SendCipherSuite: TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
			},
		},
		shouldFail:    true,
		expectedError: ":WRONG_CERTIFICATE_TYPE:",
	})

	// Test that servers decline to select a cipher suite which is
	// inconsistent with their configured certificate.
	testCases = append(testCases, testCase{
		testType: serverTest,
		name:     "ServerCipherFilter-RSA",
		config: Config{
			MaxVersion:   VersionTLS12,
			CipherSuites: []uint16{TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256},
		},
		flags: []string{
			"-cert-file", path.Join(*resourceDir, rsaCertificateFile),
			"-key-file", path.Join(*resourceDir, rsaKeyFile),
		},
		shouldFail:    true,
		expectedError: ":NO_SHARED_CIPHER:",
	})
	testCases = append(testCases, testCase{
		testType: serverTest,
		name:     "ServerCipherFilter-ECDSA",
		config: Config{
			MaxVersion:   VersionTLS12,
			CipherSuites: []uint16{TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256},
		},
		flags: []string{
			"-cert-file", path.Join(*resourceDir, ecdsaP256CertificateFile),
			"-key-file", path.Join(*resourceDir, ecdsaP256KeyFile),
		},
		shouldFail:    true,
		expectedError: ":NO_SHARED_CIPHER:",
	})
	testCases = append(testCases, testCase{
		testType: serverTest,
		name:     "ServerCipherFilter-Ed25519",
		config: Config{
			MaxVersion:   VersionTLS12,
			CipherSuites: []uint16{TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256},
		},
		flags: []string{
			"-cert-file", path.Join(*resourceDir, ed25519CertificateFile),
			"-key-file", path.Join(*resourceDir, ed25519KeyFile),
		},
		shouldFail:    true,
		expectedError: ":NO_SHARED_CIPHER:",
	})

	// Test cipher suite negotiation works as expected. Configure a
	// complicated cipher suite configuration.
	const negotiationTestCiphers = "" +
		"TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256:" +
		"[TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384|TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256|TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA]:" +
		"TLS_RSA_WITH_AES_128_GCM_SHA256:" +
		"TLS_RSA_WITH_AES_128_CBC_SHA:" +
		"[TLS_RSA_WITH_AES_256_GCM_SHA384|TLS_RSA_WITH_AES_256_CBC_SHA]"
	negotiationTests := []struct {
		ciphers  []uint16
		expected uint16
	}{
		// Server preferences are honored, including when
		// equipreference groups are involved.
		{
			[]uint16{
				TLS_RSA_WITH_AES_256_GCM_SHA384,
				TLS_RSA_WITH_AES_128_CBC_SHA,
				TLS_RSA_WITH_AES_128_GCM_SHA256,
				TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
				TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
			},
			TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
		},
		{
			[]uint16{
				TLS_RSA_WITH_AES_256_GCM_SHA384,
				TLS_RSA_WITH_AES_128_CBC_SHA,
				TLS_RSA_WITH_AES_128_GCM_SHA256,
				TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
			},
			TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
		},
		{
			[]uint16{
				TLS_RSA_WITH_AES_256_GCM_SHA384,
				TLS_RSA_WITH_AES_128_CBC_SHA,
				TLS_RSA_WITH_AES_128_GCM_SHA256,
			},
			TLS_RSA_WITH_AES_128_GCM_SHA256,
		},
		{
			[]uint16{
				TLS_RSA_WITH_AES_256_GCM_SHA384,
				TLS_RSA_WITH_AES_128_CBC_SHA,
			},
			TLS_RSA_WITH_AES_128_CBC_SHA,
		},
		// Equipreference groups use the client preference.
		{
			[]uint16{
				TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
				TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
				TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
			},
			TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
		},
		{
			[]uint16{
				TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
				TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
			},
			TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
		},
		{
			[]uint16{
				TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
				TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
			},
			TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
		},
		{
			[]uint16{
				TLS_RSA_WITH_AES_256_GCM_SHA384,
				TLS_RSA_WITH_AES_256_CBC_SHA,
			},
			TLS_RSA_WITH_AES_256_GCM_SHA384,
		},
		{
			[]uint16{
				TLS_RSA_WITH_AES_256_CBC_SHA,
				TLS_RSA_WITH_AES_256_GCM_SHA384,
			},
			TLS_RSA_WITH_AES_256_CBC_SHA,
		},
		// If there are two equipreference groups, the preferred one
		// takes precedence.
		{
			[]uint16{
				TLS_RSA_WITH_AES_256_GCM_SHA384,
				TLS_RSA_WITH_AES_256_CBC_SHA,
				TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
				TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
			},
			TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
		},
	}
	for i, t := range negotiationTests {
		testCases = append(testCases, testCase{
			testType: serverTest,
			name:     "CipherNegotiation-" + strconv.Itoa(i),
			config: Config{
				MaxVersion:   VersionTLS12,
				CipherSuites: t.ciphers,
			},
			flags:          []string{"-cipher", negotiationTestCiphers},
			expectedCipher: t.expected,
		})
	}
}

func addBadECDSASignatureTests() {
	for badR := BadValue(1); badR < NumBadValues; badR++ {
		for badS := BadValue(1); badS < NumBadValues; badS++ {
			testCases = append(testCases, testCase{
				name: fmt.Sprintf("BadECDSA-%d-%d", badR, badS),
				config: Config{
					MaxVersion:   VersionTLS12,
					CipherSuites: []uint16{TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256},
					Certificates: []Certificate{ecdsaP256Certificate},
					Bugs: ProtocolBugs{
						BadECDSAR: badR,
						BadECDSAS: badS,
					},
				},
				shouldFail:    true,
				expectedError: ":BAD_SIGNATURE:",
			})
			testCases = append(testCases, testCase{
				name: fmt.Sprintf("BadECDSA-%d-%d-TLS13", badR, badS),
				config: Config{
					MaxVersion:   VersionTLS13,
					Certificates: []Certificate{ecdsaP256Certificate},
					Bugs: ProtocolBugs{
						BadECDSAR: badR,
						BadECDSAS: badS,
					},
				},
				shouldFail:    true,
				expectedError: ":BAD_SIGNATURE:",
			})
		}
	}
}

func addCBCPaddingTests() {
	testCases = append(testCases, testCase{
		name: "MaxCBCPadding",
		config: Config{
			MaxVersion:   VersionTLS12,
			CipherSuites: []uint16{TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA},
			Bugs: ProtocolBugs{
				MaxPadding: true,
			},
		},
		messageLen: 12, // 20 bytes of SHA-1 + 12 == 0 % block size
	})
	testCases = append(testCases, testCase{
		name: "BadCBCPadding",
		config: Config{
			MaxVersion:   VersionTLS12,
			CipherSuites: []uint16{TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA},
			Bugs: ProtocolBugs{
				PaddingFirstByteBad: true,
			},
		},
		shouldFail:    true,
		expectedError: ":DECRYPTION_FAILED_OR_BAD_RECORD_MAC:",
	})
	// OpenSSL previously had an issue where the first byte of padding in
	// 255 bytes of padding wasn't checked.
	testCases = append(testCases, testCase{
		name: "BadCBCPadding255",
		config: Config{
			MaxVersion:   VersionTLS12,
			CipherSuites: []uint16{TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA},
			Bugs: ProtocolBugs{
				MaxPadding:               true,
				PaddingFirstByteBadIf255: true,
			},
		},
		messageLen:    12, // 20 bytes of SHA-1 + 12 == 0 % block size
		shouldFail:    true,
		expectedError: ":DECRYPTION_FAILED_OR_BAD_RECORD_MAC:",
	})
}

func addCBCSplittingTests() {
	var cbcCiphers = []struct {
		name   string
		cipher uint16
	}{
		{"3DES", TLS_RSA_WITH_3DES_EDE_CBC_SHA},
		{"AES128", TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA},
		{"AES256", TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA},
	}
	for _, t := range cbcCiphers {
		testCases = append(testCases, testCase{
			name: "CBCRecordSplitting-" + t.name,
			config: Config{
				MaxVersion:   VersionTLS10,
				MinVersion:   VersionTLS10,
				CipherSuites: []uint16{t.cipher},
				Bugs: ProtocolBugs{
					ExpectRecordSplitting: true,
				},
			},
			messageLen:    -1, // read until EOF
			resumeSession: true,
			flags: []string{
				"-async",
				"-write-different-record-sizes",
				"-cbc-record-splitting",
			},
		})
		testCases = append(testCases, testCase{
			name: "CBCRecordSplittingPartialWrite-" + t.name,
			config: Config{
				MaxVersion:   VersionTLS10,
				MinVersion:   VersionTLS10,
				CipherSuites: []uint16{t.cipher},
				Bugs: ProtocolBugs{
					ExpectRecordSplitting: true,
				},
			},
			messageLen: -1, // read until EOF
			flags: []string{
				"-async",
				"-write-different-record-sizes",
				"-cbc-record-splitting",
				"-partial-write",
			},
		})
	}
}

func addClientAuthTests() {
	// Add a dummy cert pool to stress certificate authority parsing.
	certPool := x509.NewCertPool()
	for _, cert := range []Certificate{rsaCertificate, rsa1024Certificate} {
		cert, err := x509.ParseCertificate(cert.Certificate[0])
		if err != nil {
			panic(err)
		}
		certPool.AddCert(cert)
	}
	caNames := certPool.Subjects()

	for _, ver := range tlsVersions {
		testCases = append(testCases, testCase{
			testType: clientTest,
			name:     ver.name + "-Client-ClientAuth-RSA",
			config: Config{
				MinVersion: ver.version,
				MaxVersion: ver.version,
				ClientAuth: RequireAnyClientCert,
				ClientCAs:  certPool,
			},
			tls13Variant: ver.tls13Variant,
			flags: []string{
				"-cert-file", path.Join(*resourceDir, rsaCertificateFile),
				"-key-file", path.Join(*resourceDir, rsaKeyFile),
			},
		})
		testCases = append(testCases, testCase{
			testType: serverTest,
			name:     ver.name + "-Server-ClientAuth-RSA",
			config: Config{
				MinVersion:   ver.version,
				MaxVersion:   ver.version,
				Certificates: []Certificate{rsaCertificate},
			},
			tls13Variant: ver.tls13Variant,
			flags:        []string{"-require-any-client-certificate"},
		})
		if ver.version != VersionSSL30 {
			testCases = append(testCases, testCase{
				testType: serverTest,
				name:     ver.name + "-Server-ClientAuth-ECDSA",
				config: Config{
					MinVersion:   ver.version,
					MaxVersion:   ver.version,
					Certificates: []Certificate{ecdsaP256Certificate},
				},
				tls13Variant: ver.tls13Variant,
				flags:        []string{"-require-any-client-certificate"},
			})
			testCases = append(testCases, testCase{
				testType: clientTest,
				name:     ver.name + "-Client-ClientAuth-ECDSA",
				config: Config{
					MinVersion: ver.version,
					MaxVersion: ver.version,
					ClientAuth: RequireAnyClientCert,
					ClientCAs:  certPool,
				},
				tls13Variant: ver.tls13Variant,
				flags: []string{
					"-cert-file", path.Join(*resourceDir, ecdsaP256CertificateFile),
					"-key-file", path.Join(*resourceDir, ecdsaP256KeyFile),
				},
			})
		}

		testCases = append(testCases, testCase{
			name: "NoClientCertificate-" + ver.name,
			config: Config{
				MinVersion: ver.version,
				MaxVersion: ver.version,
				ClientAuth: RequireAnyClientCert,
			},
			tls13Variant:       ver.tls13Variant,
			shouldFail:         true,
			expectedLocalError: "client didn't provide a certificate",
		})

		testCases = append(testCases, testCase{
			// Even if not configured to expect a certificate, OpenSSL will
			// return X509_V_OK as the verify_result.
			testType: serverTest,
			name:     "NoClientCertificateRequested-Server-" + ver.name,
			config: Config{
				MinVersion: ver.version,
				MaxVersion: ver.version,
			},
			tls13Variant: ver.tls13Variant,
			flags: []string{
				"-expect-verify-result",
			},
			resumeSession: true,
		})

		testCases = append(testCases, testCase{
			// If a client certificate is not provided, OpenSSL will still
			// return X509_V_OK as the verify_result.
			testType: serverTest,
			name:     "NoClientCertificate-Server-" + ver.name,
			config: Config{
				MinVersion: ver.version,
				MaxVersion: ver.version,
			},
			tls13Variant: ver.tls13Variant,
			flags: []string{
				"-expect-verify-result",
				"-verify-peer",
			},
			resumeSession: true,
		})

		certificateRequired := "remote error: certificate required"
		if ver.version < VersionTLS13 {
			// Prior to TLS 1.3, the generic handshake_failure alert
			// was used.
			certificateRequired = "remote error: handshake failure"
		}
		testCases = append(testCases, testCase{
			testType: serverTest,
			name:     "RequireAnyClientCertificate-" + ver.name,
			config: Config{
				MinVersion: ver.version,
				MaxVersion: ver.version,
			},
			flags:              []string{"-require-any-client-certificate"},
			tls13Variant:       ver.tls13Variant,
			shouldFail:         true,
			expectedError:      ":PEER_DID_NOT_RETURN_A_CERTIFICATE:",
			expectedLocalError: certificateRequired,
		})

		if ver.version != VersionSSL30 {
			testCases = append(testCases, testCase{
				testType: serverTest,
				name:     "SkipClientCertificate-" + ver.name,
				config: Config{
					MinVersion: ver.version,
					MaxVersion: ver.version,
					Bugs: ProtocolBugs{
						SkipClientCertificate: true,
					},
				},
				// Setting SSL_VERIFY_PEER allows anonymous clients.
				flags:         []string{"-verify-peer"},
				tls13Variant:  ver.tls13Variant,
				shouldFail:    true,
				expectedError: ":UNEXPECTED_MESSAGE:",
			})

			testCases = append(testCases, testCase{
				testType: serverTest,
				name:     "VerifyPeerIfNoOBC-NoChannelID-" + ver.name,
				config: Config{
					MinVersion: ver.version,
					MaxVersion: ver.version,
				},
				flags: []string{
					"-enable-channel-id",
					"-verify-peer-if-no-obc",
				},
				tls13Variant:       ver.tls13Variant,
				shouldFail:         true,
				expectedError:      ":PEER_DID_NOT_RETURN_A_CERTIFICATE:",
				expectedLocalError: certificateRequired,
			})

			testCases = append(testCases, testCase{
				testType: serverTest,
				name:     "VerifyPeerIfNoOBC-ChannelID-" + ver.name,
				config: Config{
					MinVersion: ver.version,
					MaxVersion: ver.version,
					ChannelID:  channelIDKey,
				},
				expectChannelID: true,
				tls13Variant:    ver.tls13Variant,
				flags: []string{
					"-enable-channel-id",
					"-verify-peer-if-no-obc",
				},
			})
		}

		testCases = append(testCases, testCase{
			testType: serverTest,
			name:     ver.name + "-Server-CertReq-CA-List",
			config: Config{
				MinVersion:   ver.version,
				MaxVersion:   ver.version,
				Certificates: []Certificate{rsaCertificate},
				Bugs: ProtocolBugs{
					ExpectCertificateReqNames: caNames,
				},
			},
			tls13Variant: ver.tls13Variant,
			flags: []string{
				"-require-any-client-certificate",
				"-use-client-ca-list", encodeDERValues(caNames),
			},
		})

		testCases = append(testCases, testCase{
			testType: clientTest,
			name:     ver.name + "-Client-CertReq-CA-List",
			config: Config{
				MinVersion:   ver.version,
				MaxVersion:   ver.version,
				Certificates: []Certificate{rsaCertificate},
				ClientAuth:   RequireAnyClientCert,
				ClientCAs:    certPool,
			},
			tls13Variant: ver.tls13Variant,
			flags: []string{
				"-cert-file", path.Join(*resourceDir, rsaCertificateFile),
				"-key-file", path.Join(*resourceDir, rsaKeyFile),
				"-expect-client-ca-list", encodeDERValues(caNames),
			},
		})
	}

	// Client auth is only legal in certificate-based ciphers.
	testCases = append(testCases, testCase{
		testType: clientTest,
		name:     "ClientAuth-PSK",
		config: Config{
			MaxVersion:   VersionTLS12,
			CipherSuites: []uint16{TLS_PSK_WITH_AES_128_CBC_SHA},
			PreSharedKey: []byte("secret"),
			ClientAuth:   RequireAnyClientCert,
		},
		flags: []string{
			"-cert-file", path.Join(*resourceDir, rsaCertificateFile),
			"-key-file", path.Join(*resourceDir, rsaKeyFile),
			"-psk", "secret",
		},
		shouldFail:    true,
		expectedError: ":UNEXPECTED_MESSAGE:",
	})
	testCases = append(testCases, testCase{
		testType: clientTest,
		name:     "ClientAuth-ECDHE_PSK",
		config: Config{
			MaxVersion:   VersionTLS12,
			CipherSuites: []uint16{TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA},
			PreSharedKey: []byte("secret"),
			ClientAuth:   RequireAnyClientCert,
		},
		flags: []string{
			"-cert-file", path.Join(*resourceDir, rsaCertificateFile),
			"-key-file", path.Join(*resourceDir, rsaKeyFile),
			"-psk", "secret",
		},
		shouldFail:    true,
		expectedError: ":UNEXPECTED_MESSAGE:",
	})

	// Regression test for a bug where the client CA list, if explicitly
	// set to NULL, was mis-encoded.
	testCases = append(testCases, testCase{
		testType: serverTest,
		name:     "Null-Client-CA-List",
		config: Config{
			MaxVersion:   VersionTLS12,
			Certificates: []Certificate{rsaCertificate},
			Bugs: ProtocolBugs{
				ExpectCertificateReqNames: [][]byte{},
			},
		},
		flags: []string{
			"-require-any-client-certificate",
			"-use-client-ca-list", "<NULL>",
		},
	})
}

func addExtendedMasterSecretTests() {
	const expectEMSFlag = "-expect-extended-master-secret"

	for _, with := range []bool{false, true} {
		prefix := "No"
		if with {
			prefix = ""
		}

		for _, isClient := range []bool{false, true} {
			suffix := "-Server"
			testType := serverTest
			if isClient {
				suffix = "-Client"
				testType = clientTest
			}

			for _, ver := range tlsVersions {
				// In TLS 1.3, the extension is irrelevant and
				// always reports as enabled.
				var flags []string
				if with || ver.version >= VersionTLS13 {
					flags = []string{expectEMSFlag}
				}

				test := testCase{
					testType: testType,
					name:     prefix + "ExtendedMasterSecret-" + ver.name + suffix,
					config: Config{
						MinVersion: ver.version,
						MaxVersion: ver.version,
						Bugs: ProtocolBugs{
							NoExtendedMasterSecret:      !with,
							RequireExtendedMasterSecret: with,
						},
					},
					tls13Variant: ver.tls13Variant,
					flags:        flags,
					shouldFail:   ver.version == VersionSSL30 && with,
				}
				if test.shouldFail {
					test.expectedLocalError = "extended master secret required but not supported by peer"
				}
				testCases = append(testCases, test)
			}
		}
	}

	for _, isClient := range []bool{false, true} {
		for _, supportedInFirstConnection := range []bool{false, true} {
			for _, supportedInResumeConnection := range []bool{false, true} {
				boolToWord := func(b bool) string {
					if b {
						return "Yes"
					}
					return "No"
				}
				suffix := boolToWord(supportedInFirstConnection) + "To" + boolToWord(supportedInResumeConnection) + "-"
				if isClient {
					suffix += "Client"
				} else {
					suffix += "Server"
				}

				supportedConfig := Config{
					MaxVersion: VersionTLS12,
					Bugs: ProtocolBugs{
						RequireExtendedMasterSecret: true,
					},
				}

				noSupportConfig := Config{
					MaxVersion: VersionTLS12,
					Bugs: ProtocolBugs{
						NoExtendedMasterSecret: true,
					},
				}

				test := testCase{
					name:          "ExtendedMasterSecret-" + suffix,
					resumeSession: true,
				}

				if !isClient {
					test.testType = serverTest
				}

				if supportedInFirstConnection {
					test.config = supportedConfig
				} else {
					test.config = noSupportConfig
				}

				if supportedInResumeConnection {
					test.resumeConfig = &supportedConfig
				} else {
					test.resumeConfig = &noSupportConfig
				}

				switch suffix {
				case "YesToYes-Client", "YesToYes-Server":
					// When a session is resumed, it should
					// still be aware that its master
					// secret was generated via EMS and
					// thus it's safe to use tls-unique.
					test.flags = []string{expectEMSFlag}
				case "NoToYes-Server":
					// If an original connection did not
					// contain EMS, but a resumption
					// handshake does, then a server should
					// not resume the session.
					test.expectResumeRejected = true
				case "YesToNo-Server":
					// Resuming an EMS session without the
					// EMS extension should cause the
					// server to abort the connection.
					test.shouldFail = true
					test.expectedError = ":RESUMED_EMS_SESSION_WITHOUT_EMS_EXTENSION:"
				case "NoToYes-Client":
					// A client should abort a connection
					// where the server resumed a non-EMS
					// session but echoed the EMS
					// extension.
					test.shouldFail = true
					test.expectedError = ":RESUMED_NON_EMS_SESSION_WITH_EMS_EXTENSION:"
				case "YesToNo-Client":
					// A client should abort a connection
					// where the server didn't echo EMS
					// when the session used it.
					test.shouldFail = true
					test.expectedError = ":RESUMED_EMS_SESSION_WITHOUT_EMS_EXTENSION:"
				}

				testCases = append(testCases, test)
			}
		}
	}

	// Switching EMS on renegotiation is forbidden.
	testCases = append(testCases, testCase{
		name: "ExtendedMasterSecret-Renego-NoEMS",
		config: Config{
			MaxVersion: VersionTLS12,
			Bugs: ProtocolBugs{
				NoExtendedMasterSecret:                true,
				NoExtendedMasterSecretOnRenegotiation: true,
			},
		},
		renegotiate: 1,
		flags: []string{
			"-renegotiate-freely",
			"-expect-total-renegotiations", "1",
		},
	})

	testCases = append(testCases, testCase{
		name: "ExtendedMasterSecret-Renego-Upgrade",
		config: Config{
			MaxVersion: VersionTLS12,
			Bugs: ProtocolBugs{
				NoExtendedMasterSecret: true,
			},
		},
		renegotiate: 1,
		flags: []string{
			"-renegotiate-freely",
			"-expect-total-renegotiations", "1",
		},
		shouldFail:    true,
		expectedError: ":RENEGOTIATION_EMS_MISMATCH:",
	})

	testCases = append(testCases, testCase{
		name: "ExtendedMasterSecret-Renego-Downgrade",
		config: Config{
			MaxVersion: VersionTLS12,
			Bugs: ProtocolBugs{
				NoExtendedMasterSecretOnRenegotiation: true,
			},
		},
		renegotiate: 1,
		flags: []string{
			"-renegotiate-freely",
			"-expect-total-renegotiations", "1",
		},
		shouldFail:    true,
		expectedError: ":RENEGOTIATION_EMS_MISMATCH:",
	})
}

type stateMachineTestConfig struct {
	protocol            protocol
	async               bool
	splitHandshake      bool
	packHandshakeFlight bool
	implicitHandshake   bool
}

// Adds tests that try to cover the range of the handshake state machine, under
// various conditions. Some of these are redundant with other tests, but they
// only cover the synchronous case.
func addAllStateMachineCoverageTests() {
	for _, async := range []bool{false, true} {
		for _, protocol := range []protocol{tls, dtls} {
			addStateMachineCoverageTests(stateMachineTestConfig{
				protocol: protocol,
				async:    async,
			})
			addStateMachineCoverageTests(stateMachineTestConfig{
				protocol:          protocol,
				async:             async,
				implicitHandshake: true,
			})
			addStateMachineCoverageTests(stateMachineTestConfig{
				protocol:       protocol,
				async:          async,
				splitHandshake: true,
			})
			if protocol == tls {
				addStateMachineCoverageTests(stateMachineTestConfig{
					protocol:            protocol,
					async:               async,
					packHandshakeFlight: true,
				})
			}
		}
	}
}

func addStateMachineCoverageTests(config stateMachineTestConfig) {
	var tests []testCase

	// Basic handshake, with resumption. Client and server,
	// session ID and session ticket.
	tests = append(tests, testCase{
		name: "Basic-Client",
		config: Config{
			MaxVersion: VersionTLS12,
		},
		resumeSession: true,
		// Ensure session tickets are used, not session IDs.
		noSessionCache: true,
	})
	tests = append(tests, testCase{
		name: "Basic-Client-RenewTicket",
		config: Config{
			MaxVersion: VersionTLS12,
			Bugs: ProtocolBugs{
				RenewTicketOnResume: true,
			},
		},
		flags:                []string{"-expect-ticket-renewal"},
		resumeSession:        true,
		resumeRenewedSession: true,
	})
	tests = append(tests, testCase{
		name: "Basic-Client-NoTicket",
		config: Config{
			MaxVersion:             VersionTLS12,
			SessionTicketsDisabled: true,
		},
		resumeSession: true,
	})
	tests = append(tests, testCase{
		testType: serverTest,
		name:     "Basic-Server",
		config: Config{
			MaxVersion: VersionTLS12,
			Bugs: ProtocolBugs{
				RequireSessionTickets: true,
			},
		},
		resumeSession: true,
		flags:         []string{"-expect-no-session-id"},
	})
	tests = append(tests, testCase{
		testType: serverTest,
		name:     "Basic-Server-NoTickets",
		config: Config{
			MaxVersion:             VersionTLS12,
			SessionTicketsDisabled: true,
		},
		resumeSession: true,
		flags:         []string{"-expect-session-id"},
	})
	tests = append(tests, testCase{
		testType: serverTest,
		name:     "Basic-Server-EarlyCallback",
		config: Config{
			MaxVersion: VersionTLS12,
		},
		flags:         []string{"-use-early-callback"},
		resumeSession: true,
	})

	// TLS 1.3 basic handshake shapes.
	if config.protocol == tls {
		tests = append(tests, testCase{
			name: "TLS13-1RTT-Client",
			config: Config{
				MaxVersion: VersionTLS13,
				MinVersion: VersionTLS13,
			},
			resumeSession:        true,
			resumeRenewedSession: true,
		})

		tests = append(tests, testCase{
			testType: serverTest,
			name:     "TLS13-1RTT-Server",
			config: Config{
				MaxVersion: VersionTLS13,
				MinVersion: VersionTLS13,
			},
			resumeSession:        true,
			resumeRenewedSession: true,
			// TLS 1.3 uses tickets, so the session should not be
			// cached statefully.
			flags: []string{"-expect-no-session-id"},
		})

		tests = append(tests, testCase{
			name: "TLS13-HelloRetryRequest-Client",
			config: Config{
				MaxVersion: VersionTLS13,
				MinVersion: VersionTLS13,
				// P-384 requires a HelloRetryRequest against BoringSSL's default
				// configuration. Assert this with ExpectMissingKeyShare.
				CurvePreferences: []CurveID{CurveP384},
				Bugs: ProtocolBugs{
					ExpectMissingKeyShare: true,
				},
			},
			// Cover HelloRetryRequest during an ECDHE-PSK resumption.
			resumeSession: true,
		})

		tests = append(tests, testCase{
			testType: serverTest,
			name:     "TLS13-HelloRetryRequest-Server",
			config: Config{
				MaxVersion: VersionTLS13,
				MinVersion: VersionTLS13,
				// Require a HelloRetryRequest for every curve.
				DefaultCurves: []CurveID{},
			},
			// Cover HelloRetryRequest during an ECDHE-PSK resumption.
			resumeSession: true,
		})

		tests = append(tests, testCase{
			testType: clientTest,
			name:     "TLS13-EarlyData-Client",
			config: Config{
				MaxVersion:       VersionTLS13,
				MinVersion:       VersionTLS13,
				MaxEarlyDataSize: 16384,
			},
			resumeConfig: &Config{
				MaxVersion:       VersionTLS13,
				MinVersion:       VersionTLS13,
				MaxEarlyDataSize: 16384,
				Bugs: ProtocolBugs{
					ExpectEarlyData: [][]byte{{'h', 'e', 'l', 'l', 'o'}},
				},
			},
			resumeSession: true,
			flags: []string{
				"-enable-early-data",
				"-expect-early-data-info",
				"-expect-accept-early-data",
				"-on-resume-shim-writes-first",
			},
		})

		tests = append(tests, testCase{
			testType: clientTest,
			name:     "TLS13Experiment-EarlyData-Client",
			config: Config{
				MaxVersion:       VersionTLS13,
				MinVersion:       VersionTLS13,
				MaxEarlyDataSize: 16384,
			},
			resumeConfig: &Config{
				MaxVersion:       VersionTLS13,
				MinVersion:       VersionTLS13,
				MaxEarlyDataSize: 16384,
				Bugs: ProtocolBugs{
					ExpectEarlyData: [][]byte{{'h', 'e', 'l', 'l', 'o'}},
				},
			},
			tls13Variant:  TLS13Experiment,
			resumeSession: true,
			flags: []string{
				"-enable-early-data",
				"-expect-early-data-info",
				"-expect-accept-early-data",
				"-on-resume-shim-writes-first",
			},
		})

		tests = append(tests, testCase{
			testType: clientTest,
			name:     "TLS13RecordTypeExperiment-EarlyData-Client",
			config: Config{
				MaxVersion:       VersionTLS13,
				MinVersion:       VersionTLS13,
				TLS13Variant:     TLS13RecordTypeExperiment,
				MaxEarlyDataSize: 16384,
			},
			resumeConfig: &Config{
				MaxVersion:       VersionTLS13,
				MinVersion:       VersionTLS13,
				TLS13Variant:     TLS13RecordTypeExperiment,
				MaxEarlyDataSize: 16384,
				Bugs: ProtocolBugs{
					ExpectEarlyData: [][]byte{{'h', 'e', 'l', 'l', 'o'}},
				},
			},
			tls13Variant:  TLS13RecordTypeExperiment,
			resumeSession: true,
			flags: []string{
				"-enable-early-data",
				"-expect-early-data-info",
				"-expect-accept-early-data",
				"-on-resume-shim-writes-first",
			},
		})

		tests = append(tests, testCase{
			testType: clientTest,
			name:     "TLS13-EarlyData-TooMuchData-Client",
			config: Config{
				MaxVersion:       VersionTLS13,
				MinVersion:       VersionTLS13,
				MaxEarlyDataSize: 2,
			},
			resumeConfig: &Config{
				MaxVersion:       VersionTLS13,
				MinVersion:       VersionTLS13,
				MaxEarlyDataSize: 2,
				Bugs: ProtocolBugs{
					ExpectEarlyData: [][]byte{{'h', 'e'}},
				},
			},
			resumeShimPrefix: "llo",
			resumeSession:    true,
			flags: []string{
				"-enable-early-data",
				"-expect-early-data-info",
				"-expect-accept-early-data",
				"-on-resume-shim-writes-first",
			},
		})

		// Unfinished writes can only be tested when operations are async. EarlyData
		// can't be tested as part of an ImplicitHandshake in this case since
		// otherwise the early data will be sent as normal data.
		if config.async && !config.implicitHandshake {
			tests = append(tests, testCase{
				testType: clientTest,
				name:     "TLS13-EarlyData-UnfinishedWrite-Client",
				config: Config{
					MaxVersion:       VersionTLS13,
					MinVersion:       VersionTLS13,
					MaxEarlyDataSize: 16384,
				},
				resumeConfig: &Config{
					MaxVersion:       VersionTLS13,
					MinVersion:       VersionTLS13,
					MaxEarlyDataSize: 16384,
					Bugs: ProtocolBugs{
						ExpectLateEarlyData: [][]byte{{'h', 'e', 'l', 'l', 'o'}},
					},
				},
				resumeSession: true,
				flags: []string{
					"-enable-early-data",
					"-expect-early-data-info",
					"-expect-accept-early-data",
					"-on-resume-read-with-unfinished-write",
					"-on-resume-shim-writes-first",
				},
			})

			// Rejected unfinished writes are discarded (from the
			// perspective of the calling application) on 0-RTT
			// reject.
			tests = append(tests, testCase{
				testType: clientTest,
				name:     "TLS13-EarlyData-RejectUnfinishedWrite-Client",
				config: Config{
					MaxVersion:       VersionTLS13,
					MinVersion:       VersionTLS13,
					MaxEarlyDataSize: 16384,
				},
				resumeConfig: &Config{
					MaxVersion:       VersionTLS13,
					MinVersion:       VersionTLS13,
					MaxEarlyDataSize: 16384,
					Bugs: ProtocolBugs{
						AlwaysRejectEarlyData: true,
					},
				},
				resumeSession: true,
				flags: []string{
					"-enable-early-data",
					"-expect-early-data-info",
					"-expect-reject-early-data",
					"-on-resume-read-with-unfinished-write",
					"-on-resume-shim-writes-first",
				},
			})
		}

		tests = append(tests, testCase{
			testType: serverTest,
			name:     "TLS13-EarlyData-Server",
			config: Config{
				MaxVersion: VersionTLS13,
				MinVersion: VersionTLS13,
				Bugs: ProtocolBugs{
					SendEarlyData:           [][]byte{{1, 2, 3, 4}},
					ExpectEarlyDataAccepted: true,
					ExpectHalfRTTData:       [][]byte{{254, 253, 252, 251}},
				},
			},
			messageCount:  2,
			resumeSession: true,
			flags: []string{
				"-enable-early-data",
				"-expect-accept-early-data",
			},
		})

		tests = append(tests, testCase{
			testType: serverTest,
			name:     "TLS13Experiment-EarlyData-Server",
			config: Config{
				MaxVersion: VersionTLS13,
				MinVersion: VersionTLS13,
				Bugs: ProtocolBugs{
					SendEarlyData:           [][]byte{{1, 2, 3, 4}},
					ExpectEarlyDataAccepted: true,
					ExpectHalfRTTData:       [][]byte{{254, 253, 252, 251}},
				},
			},
			tls13Variant:  TLS13Experiment,
			messageCount:  2,
			resumeSession: true,
			flags: []string{
				"-enable-early-data",
				"-expect-accept-early-data",
			},
		})

		tests = append(tests, testCase{
			testType: serverTest,
			name:     "TLS13RecordTypeExperiment-EarlyData-Server",
			config: Config{
				MaxVersion: VersionTLS13,
				MinVersion: VersionTLS13,
				Bugs: ProtocolBugs{
					SendEarlyData:           [][]byte{{1, 2, 3, 4}},
					ExpectEarlyDataAccepted: true,
					ExpectHalfRTTData:       [][]byte{{254, 253, 252, 251}},
				},
			},
			tls13Variant:  TLS13RecordTypeExperiment,
			messageCount:  2,
			resumeSession: true,
			flags: []string{
				"-enable-early-data",
				"-expect-accept-early-data",
			},
		})

		tests = append(tests, testCase{
			testType: serverTest,
			name:     "TLS13-MaxEarlyData-Server",
			config: Config{
				MaxVersion: VersionTLS13,
				MinVersion: VersionTLS13,
				Bugs: ProtocolBugs{
					SendEarlyData:           [][]byte{bytes.Repeat([]byte{1}, 14336+1)},
					ExpectEarlyDataAccepted: true,
				},
			},
			messageCount:  2,
			resumeSession: true,
			flags: []string{
				"-enable-early-data",
				"-expect-accept-early-data",
			},
			shouldFail:    true,