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boringssl/ssl/test/runner/handshake_messages.go
David Benjamin 278b3120ee Validate ClientHellos in tests some more. 
This way we'll notice if we ever generate a bad padding extension or
duplicate an extension. This did require fixing one of the JDK11 test
vectors. When I manually added a padding extension, I forgot the
contents were all zeros and incorrectly put in "padding" instead.

Change-Id: Ifec5bb01a739014ed0fdf5b49b82a6b514646e9a
Reviewed-on: https://boringssl-review.googlesource.com/c/33444
Commit-Queue: David Benjamin <davidben@google.com>
Commit-Queue: Adam Langley <agl@google.com>
Reviewed-by: Adam Langley <agl@google.com>
2018-12-03 20:31:55 +00:00

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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package runner
import (
"bytes"
"encoding/binary"
"fmt"
)
func writeLen(buf []byte, v, size int) {
for i := 0; i < size; i++ {
buf[size-i-1] = byte(v)
v >>= 8
}
if v != 0 {
panic("length is too long")
}
}
type byteBuilder struct {
buf *[]byte
start int
prefixLen int
child *byteBuilder
}
func newByteBuilder() *byteBuilder {
buf := make([]byte, 0, 32)
return &byteBuilder{buf: &buf}
}
func (bb *byteBuilder) len() int {
return len(*bb.buf) - bb.start - bb.prefixLen
}
func (bb *byteBuilder) data() []byte {
bb.flush()
return (*bb.buf)[bb.start+bb.prefixLen:]
}
func (bb *byteBuilder) flush() {
if bb.child == nil {
return
}
bb.child.flush()
writeLen((*bb.buf)[bb.child.start:], bb.child.len(), bb.child.prefixLen)
bb.child = nil
return
}
func (bb *byteBuilder) finish() []byte {
bb.flush()
return *bb.buf
}
func (bb *byteBuilder) addU8(u uint8) {
bb.flush()
*bb.buf = append(*bb.buf, u)
}
func (bb *byteBuilder) addU16(u uint16) {
bb.flush()
*bb.buf = append(*bb.buf, byte(u>>8), byte(u))
}
func (bb *byteBuilder) addU24(u int) {
bb.flush()
*bb.buf = append(*bb.buf, byte(u>>16), byte(u>>8), byte(u))
}
func (bb *byteBuilder) addU32(u uint32) {
bb.flush()
*bb.buf = append(*bb.buf, byte(u>>24), byte(u>>16), byte(u>>8), byte(u))
}
func (bb *byteBuilder) addU64(u uint64) {
bb.flush()
var b [8]byte
binary.BigEndian.PutUint64(b[:], u)
*bb.buf = append(*bb.buf, b[:]...)
}
func (bb *byteBuilder) addU8LengthPrefixed() *byteBuilder {
return bb.createChild(1)
}
func (bb *byteBuilder) addU16LengthPrefixed() *byteBuilder {
return bb.createChild(2)
}
func (bb *byteBuilder) addU24LengthPrefixed() *byteBuilder {
return bb.createChild(3)
}
func (bb *byteBuilder) addU32LengthPrefixed() *byteBuilder {
return bb.createChild(4)
}
func (bb *byteBuilder) addBytes(b []byte) {
bb.flush()
*bb.buf = append(*bb.buf, b...)
}
func (bb *byteBuilder) createChild(lengthPrefixSize int) *byteBuilder {
bb.flush()
bb.child = &byteBuilder{
buf: bb.buf,
start: len(*bb.buf),
prefixLen: lengthPrefixSize,
}
for i := 0; i < lengthPrefixSize; i++ {
*bb.buf = append(*bb.buf, 0)
}
return bb.child
}
func (bb *byteBuilder) discardChild() {
if bb.child == nil {
return
}
*bb.buf = (*bb.buf)[:bb.child.start]
bb.child = nil
}
type byteReader []byte
func (br *byteReader) readInternal(out *byteReader, n int) bool {
if len(*br) < n {
return false
}
*out = (*br)[:n]
*br = (*br)[n:]
return true
}
func (br *byteReader) readBytes(out *[]byte, n int) bool {
var child byteReader
if !br.readInternal(&child, n) {
return false
}
*out = []byte(child)
return true
}
func (br *byteReader) readUint(out *uint64, n int) bool {
var b []byte
if !br.readBytes(&b, n) {
return false
}
*out = 0
for _, v := range b {
*out <<= 8
*out |= uint64(v)
}
return true
}
func (br *byteReader) readU8(out *uint8) bool {
var b []byte
if !br.readBytes(&b, 1) {
return false
}
*out = b[0]
return true
}
func (br *byteReader) readU16(out *uint16) bool {
var v uint64
if !br.readUint(&v, 2) {
return false
}
*out = uint16(v)
return true
}
func (br *byteReader) readU24(out *uint32) bool {
var v uint64
if !br.readUint(&v, 3) {
return false
}
*out = uint32(v)
return true
}
func (br *byteReader) readU32(out *uint32) bool {
var v uint64
if !br.readUint(&v, 4) {
return false
}
*out = uint32(v)
return true
}
func (br *byteReader) readU64(out *uint64) bool {
return br.readUint(out, 8)
}
func (br *byteReader) readLengthPrefixed(out *byteReader, n int) bool {
var length uint64
return br.readUint(&length, n) &&
uint64(len(*br)) >= length &&
br.readInternal(out, int(length))
}
func (br *byteReader) readLengthPrefixedBytes(out *[]byte, n int) bool {
var length uint64
return br.readUint(&length, n) &&
uint64(len(*br)) >= length &&
br.readBytes(out, int(length))
}
func (br *byteReader) readU8LengthPrefixed(out *byteReader) bool {
return br.readLengthPrefixed(out, 1)
}
func (br *byteReader) readU8LengthPrefixedBytes(out *[]byte) bool {
return br.readLengthPrefixedBytes(out, 1)
}
func (br *byteReader) readU16LengthPrefixed(out *byteReader) bool {
return br.readLengthPrefixed(out, 2)
}
func (br *byteReader) readU16LengthPrefixedBytes(out *[]byte) bool {
return br.readLengthPrefixedBytes(out, 2)
}
func (br *byteReader) readU24LengthPrefixed(out *byteReader) bool {
return br.readLengthPrefixed(out, 3)
}
func (br *byteReader) readU24LengthPrefixedBytes(out *[]byte) bool {
return br.readLengthPrefixedBytes(out, 3)
}
func (br *byteReader) readU32LengthPrefixed(out *byteReader) bool {
return br.readLengthPrefixed(out, 4)
}
func (br *byteReader) readU32LengthPrefixedBytes(out *[]byte) bool {
return br.readLengthPrefixedBytes(out, 4)
}
type keyShareEntry struct {
group CurveID
keyExchange []byte
}
type pskIdentity struct {
ticket []uint8
obfuscatedTicketAge uint32
}
type clientHelloMsg struct {
raw []byte
isDTLS bool
vers uint16
random []byte
sessionId []byte
cookie []byte
cipherSuites []uint16
compressionMethods []uint8
nextProtoNeg bool
serverName string
ocspStapling bool
supportedCurves []CurveID
supportedPoints []uint8
hasKeyShares bool
keyShares []keyShareEntry
keySharesRaw []byte
trailingKeyShareData bool
pskIdentities []pskIdentity
pskKEModes []byte
pskBinders [][]uint8
hasEarlyData bool
tls13Cookie []byte
ticketSupported bool
sessionTicket []uint8
signatureAlgorithms []signatureAlgorithm
signatureAlgorithmsCert []signatureAlgorithm
supportedVersions []uint16
secureRenegotiation []byte
alpnProtocols []string
quicTransportParams []byte
duplicateExtension bool
channelIDSupported bool
tokenBindingParams []byte
tokenBindingVersion uint16
npnAfterAlpn bool
extendedMasterSecret bool
srtpProtectionProfiles []uint16
srtpMasterKeyIdentifier string
sctListSupported bool
customExtension string
hasGREASEExtension bool
pskBinderFirst bool
omitExtensions bool
emptyExtensions bool
pad int
compressedCertAlgs []uint16
}
func (m *clientHelloMsg) equal(i interface{}) bool {
m1, ok := i.(*clientHelloMsg)
if !ok {
return false
}
return bytes.Equal(m.raw, m1.raw) &&
m.isDTLS == m1.isDTLS &&
m.vers == m1.vers &&
bytes.Equal(m.random, m1.random) &&
bytes.Equal(m.sessionId, m1.sessionId) &&
bytes.Equal(m.cookie, m1.cookie) &&
eqUint16s(m.cipherSuites, m1.cipherSuites) &&
bytes.Equal(m.compressionMethods, m1.compressionMethods) &&
m.nextProtoNeg == m1.nextProtoNeg &&
m.serverName == m1.serverName &&
m.ocspStapling == m1.ocspStapling &&
eqCurveIDs(m.supportedCurves, m1.supportedCurves) &&
bytes.Equal(m.supportedPoints, m1.supportedPoints) &&
m.hasKeyShares == m1.hasKeyShares &&
eqKeyShareEntryLists(m.keyShares, m1.keyShares) &&
m.trailingKeyShareData == m1.trailingKeyShareData &&
eqPSKIdentityLists(m.pskIdentities, m1.pskIdentities) &&
bytes.Equal(m.pskKEModes, m1.pskKEModes) &&
eqByteSlices(m.pskBinders, m1.pskBinders) &&
m.hasEarlyData == m1.hasEarlyData &&
bytes.Equal(m.tls13Cookie, m1.tls13Cookie) &&
m.ticketSupported == m1.ticketSupported &&
bytes.Equal(m.sessionTicket, m1.sessionTicket) &&
eqSignatureAlgorithms(m.signatureAlgorithms, m1.signatureAlgorithms) &&
eqSignatureAlgorithms(m.signatureAlgorithmsCert, m1.signatureAlgorithmsCert) &&
eqUint16s(m.supportedVersions, m1.supportedVersions) &&
bytes.Equal(m.secureRenegotiation, m1.secureRenegotiation) &&
(m.secureRenegotiation == nil) == (m1.secureRenegotiation == nil) &&
eqStrings(m.alpnProtocols, m1.alpnProtocols) &&
bytes.Equal(m.quicTransportParams, m1.quicTransportParams) &&
m.duplicateExtension == m1.duplicateExtension &&
m.channelIDSupported == m1.channelIDSupported &&
bytes.Equal(m.tokenBindingParams, m1.tokenBindingParams) &&
m.tokenBindingVersion == m1.tokenBindingVersion &&
m.npnAfterAlpn == m1.npnAfterAlpn &&
m.extendedMasterSecret == m1.extendedMasterSecret &&
eqUint16s(m.srtpProtectionProfiles, m1.srtpProtectionProfiles) &&
m.srtpMasterKeyIdentifier == m1.srtpMasterKeyIdentifier &&
m.sctListSupported == m1.sctListSupported &&
m.customExtension == m1.customExtension &&
m.hasGREASEExtension == m1.hasGREASEExtension &&
m.pskBinderFirst == m1.pskBinderFirst &&
m.omitExtensions == m1.omitExtensions &&
m.emptyExtensions == m1.emptyExtensions &&
m.pad == m1.pad &&
eqUint16s(m.compressedCertAlgs, m1.compressedCertAlgs)
}
func (m *clientHelloMsg) marshalKeyShares(bb *byteBuilder) {
keyShares := bb.addU16LengthPrefixed()
for _, keyShare := range m.keyShares {
keyShares.addU16(uint16(keyShare.group))
keyExchange := keyShares.addU16LengthPrefixed()
keyExchange.addBytes(keyShare.keyExchange)
}
if m.trailingKeyShareData {
keyShares.addU8(0)
}
}
func (m *clientHelloMsg) marshal() []byte {
if m.raw != nil {
return m.raw
}
handshakeMsg := newByteBuilder()
handshakeMsg.addU8(typeClientHello)
hello := handshakeMsg.addU24LengthPrefixed()
hello.addU16(m.vers)
hello.addBytes(m.random)
sessionId := hello.addU8LengthPrefixed()
sessionId.addBytes(m.sessionId)
if m.isDTLS {
cookie := hello.addU8LengthPrefixed()
cookie.addBytes(m.cookie)
}
cipherSuites := hello.addU16LengthPrefixed()
for _, suite := range m.cipherSuites {
cipherSuites.addU16(suite)
}
compressionMethods := hello.addU8LengthPrefixed()
compressionMethods.addBytes(m.compressionMethods)
extensions := hello.addU16LengthPrefixed()
if len(m.pskIdentities) > 0 && m.pskBinderFirst {
extensions.addU16(extensionPreSharedKey)
pskExtension := extensions.addU16LengthPrefixed()
pskIdentities := pskExtension.addU16LengthPrefixed()
for _, psk := range m.pskIdentities {
pskIdentities.addU16LengthPrefixed().addBytes(psk.ticket)
pskIdentities.addU32(psk.obfuscatedTicketAge)
}
pskBinders := pskExtension.addU16LengthPrefixed()
for _, binder := range m.pskBinders {
pskBinders.addU8LengthPrefixed().addBytes(binder)
}
}
if m.duplicateExtension {
// Add a duplicate bogus extension at the beginning and end.
extensions.addU16(0xffff)
extensions.addU16(0) // 0-length for empty extension
}
if m.nextProtoNeg && !m.npnAfterAlpn {
extensions.addU16(extensionNextProtoNeg)
extensions.addU16(0) // The length is always 0
}
if len(m.serverName) > 0 {
extensions.addU16(extensionServerName)
serverNameList := extensions.addU16LengthPrefixed()
// RFC 3546, section 3.1
//
// struct {
// NameType name_type;
// select (name_type) {
// case host_name: HostName;
// } name;
// } ServerName;
//
// enum {
// host_name(0), (255)
// } NameType;
//
// opaque HostName<1..2^16-1>;
//
// struct {
// ServerName server_name_list<1..2^16-1>
// } ServerNameList;
serverName := serverNameList.addU16LengthPrefixed()
serverName.addU8(0) // NameType host_name(0)
hostName := serverName.addU16LengthPrefixed()
hostName.addBytes([]byte(m.serverName))
}
if m.ocspStapling {
extensions.addU16(extensionStatusRequest)
certificateStatusRequest := extensions.addU16LengthPrefixed()
// RFC 4366, section 3.6
certificateStatusRequest.addU8(1) // OCSP type
// Two zero valued uint16s for the two lengths.
certificateStatusRequest.addU16(0) // ResponderID length
certificateStatusRequest.addU16(0) // Extensions length
}
if len(m.supportedCurves) > 0 {
// http://tools.ietf.org/html/rfc4492#section-5.1.1
extensions.addU16(extensionSupportedCurves)
supportedCurvesList := extensions.addU16LengthPrefixed()
supportedCurves := supportedCurvesList.addU16LengthPrefixed()
for _, curve := range m.supportedCurves {
supportedCurves.addU16(uint16(curve))
}
}
if len(m.supportedPoints) > 0 {
// http://tools.ietf.org/html/rfc4492#section-5.1.2
extensions.addU16(extensionSupportedPoints)
supportedPointsList := extensions.addU16LengthPrefixed()
supportedPoints := supportedPointsList.addU8LengthPrefixed()
supportedPoints.addBytes(m.supportedPoints)
}
if m.hasKeyShares {
extensions.addU16(extensionKeyShare)
keyShareList := extensions.addU16LengthPrefixed()
m.marshalKeyShares(keyShareList)
}
if len(m.pskKEModes) > 0 {
extensions.addU16(extensionPSKKeyExchangeModes)
pskModesExtension := extensions.addU16LengthPrefixed()
pskModesExtension.addU8LengthPrefixed().addBytes(m.pskKEModes)
}
if m.hasEarlyData {
extensions.addU16(extensionEarlyData)
extensions.addU16(0) // The length is zero.
}
if len(m.tls13Cookie) > 0 {
extensions.addU16(extensionCookie)
body := extensions.addU16LengthPrefixed()
body.addU16LengthPrefixed().addBytes(m.tls13Cookie)
}
if m.ticketSupported {
// http://tools.ietf.org/html/rfc5077#section-3.2
extensions.addU16(extensionSessionTicket)
sessionTicketExtension := extensions.addU16LengthPrefixed()
sessionTicketExtension.addBytes(m.sessionTicket)
}
if len(m.signatureAlgorithms) > 0 {
// https://tools.ietf.org/html/rfc5246#section-7.4.1.4.1
extensions.addU16(extensionSignatureAlgorithms)
signatureAlgorithmsExtension := extensions.addU16LengthPrefixed()
signatureAlgorithms := signatureAlgorithmsExtension.addU16LengthPrefixed()
for _, sigAlg := range m.signatureAlgorithms {
signatureAlgorithms.addU16(uint16(sigAlg))
}
}
if len(m.signatureAlgorithmsCert) > 0 {
extensions.addU16(extensionSignatureAlgorithmsCert)
signatureAlgorithmsCertExtension := extensions.addU16LengthPrefixed()
signatureAlgorithmsCert := signatureAlgorithmsCertExtension.addU16LengthPrefixed()
for _, sigAlg := range m.signatureAlgorithmsCert {
signatureAlgorithmsCert.addU16(uint16(sigAlg))
}
}
if len(m.supportedVersions) > 0 {
extensions.addU16(extensionSupportedVersions)
supportedVersionsExtension := extensions.addU16LengthPrefixed()
supportedVersions := supportedVersionsExtension.addU8LengthPrefixed()
for _, version := range m.supportedVersions {
supportedVersions.addU16(uint16(version))
}
}
if m.secureRenegotiation != nil {
extensions.addU16(extensionRenegotiationInfo)
secureRenegoExt := extensions.addU16LengthPrefixed()
secureRenego := secureRenegoExt.addU8LengthPrefixed()
secureRenego.addBytes(m.secureRenegotiation)
}
if len(m.alpnProtocols) > 0 {
// https://tools.ietf.org/html/rfc7301#section-3.1
extensions.addU16(extensionALPN)
alpnExtension := extensions.addU16LengthPrefixed()
protocolNameList := alpnExtension.addU16LengthPrefixed()
for _, s := range m.alpnProtocols {
protocolName := protocolNameList.addU8LengthPrefixed()
protocolName.addBytes([]byte(s))
}
}
if len(m.quicTransportParams) > 0 {
extensions.addU16(extensionQUICTransportParams)
params := extensions.addU16LengthPrefixed()
params.addBytes(m.quicTransportParams)
}
if m.channelIDSupported {
extensions.addU16(extensionChannelID)
extensions.addU16(0) // Length is always 0
}
if m.tokenBindingParams != nil {
extensions.addU16(extensionTokenBinding)
tokbindExtension := extensions.addU16LengthPrefixed()
tokbindExtension.addU16(m.tokenBindingVersion)
tokbindParams := tokbindExtension.addU8LengthPrefixed()
tokbindParams.addBytes(m.tokenBindingParams)
}
if m.nextProtoNeg && m.npnAfterAlpn {
extensions.addU16(extensionNextProtoNeg)
extensions.addU16(0) // Length is always 0
}
if m.duplicateExtension {
// Add a duplicate bogus extension at the beginning and end.
extensions.addU16(0xffff)
extensions.addU16(0)
}
if m.extendedMasterSecret {
// https://tools.ietf.org/html/rfc7627
extensions.addU16(extensionExtendedMasterSecret)
extensions.addU16(0) // Length is always 0
}
if len(m.srtpProtectionProfiles) > 0 {
// https://tools.ietf.org/html/rfc5764#section-4.1.1
extensions.addU16(extensionUseSRTP)
useSrtpExt := extensions.addU16LengthPrefixed()
srtpProtectionProfiles := useSrtpExt.addU16LengthPrefixed()
for _, p := range m.srtpProtectionProfiles {
srtpProtectionProfiles.addU16(p)
}
srtpMki := useSrtpExt.addU8LengthPrefixed()
srtpMki.addBytes([]byte(m.srtpMasterKeyIdentifier))
}
if m.sctListSupported {
extensions.addU16(extensionSignedCertificateTimestamp)
extensions.addU16(0) // Length is always 0
}
if l := len(m.customExtension); l > 0 {
extensions.addU16(extensionCustom)
customExt := extensions.addU16LengthPrefixed()
customExt.addBytes([]byte(m.customExtension))
}
if len(m.compressedCertAlgs) > 0 {
extensions.addU16(extensionCompressedCertAlgs)
body := extensions.addU16LengthPrefixed()
algIDs := body.addU8LengthPrefixed()
for _, v := range m.compressedCertAlgs {
algIDs.addU16(v)
}
}
// The PSK extension must be last. See https://tools.ietf.org/html/rfc8446#section-4.2.11
if len(m.pskIdentities) > 0 && !m.pskBinderFirst {
extensions.addU16(extensionPreSharedKey)
pskExtension := extensions.addU16LengthPrefixed()
pskIdentities := pskExtension.addU16LengthPrefixed()
for _, psk := range m.pskIdentities {
pskIdentities.addU16LengthPrefixed().addBytes(psk.ticket)
pskIdentities.addU32(psk.obfuscatedTicketAge)
}
pskBinders := pskExtension.addU16LengthPrefixed()
for _, binder := range m.pskBinders {
pskBinders.addU8LengthPrefixed().addBytes(binder)
}
}
if m.pad != 0 && hello.len()%m.pad != 0 {
extensions.addU16(extensionPadding)
padding := extensions.addU16LengthPrefixed()
// Note hello.len() has changed at this point from the length
// prefix.
if l := hello.len() % m.pad; l != 0 {
padding.addBytes(make([]byte, m.pad-l))
}
}
if m.omitExtensions || m.emptyExtensions {
// Silently erase any extensions which were sent.
hello.discardChild()
if m.emptyExtensions {
hello.addU16(0)
}
}
m.raw = handshakeMsg.finish()
// Sanity-check padding.
if m.pad != 0 && (len(m.raw)-4)%m.pad != 0 {
panic(fmt.Sprintf("%d is not a multiple of %d", len(m.raw)-4, m.pad))
}
return m.raw
}
func parseSignatureAlgorithms(reader *byteReader, out *[]signatureAlgorithm, allowEmpty bool) bool {
var sigAlgs byteReader
if !reader.readU16LengthPrefixed(&sigAlgs) {
return false
}
if !allowEmpty && len(sigAlgs) == 0 {
return false
}
*out = make([]signatureAlgorithm, 0, len(sigAlgs)/2)
for len(sigAlgs) > 0 {
var v uint16
if !sigAlgs.readU16(&v) {
return false
}
*out = append(*out, signatureAlgorithm(v))
}
return true
}
func checkDuplicateExtensions(extensions byteReader) bool {
seen := make(map[uint16]struct{})
for len(extensions) > 0 {
var extension uint16
var body byteReader
if !extensions.readU16(&extension) ||
!extensions.readU16LengthPrefixed(&body) {
return false
}
if _, ok := seen[extension]; ok {
return false
}
seen[extension] = struct{}{}
}
return true
}
func (m *clientHelloMsg) unmarshal(data []byte) bool {
m.raw = data
reader := byteReader(data[4:])
if !reader.readU16(&m.vers) ||
!reader.readBytes(&m.random, 32) ||
!reader.readU8LengthPrefixedBytes(&m.sessionId) ||
len(m.sessionId) > 32 {
return false
}
if m.isDTLS {
if !reader.readU8LengthPrefixedBytes(&m.cookie) ||
len(m.cookie) > 32 {
return false
}
}
var cipherSuites byteReader
if !reader.readU16LengthPrefixed(&cipherSuites) ||
!reader.readU8LengthPrefixedBytes(&m.compressionMethods) {
return false
}
m.cipherSuites = make([]uint16, 0, len(cipherSuites)/2)
for len(cipherSuites) > 0 {
var v uint16
if !cipherSuites.readU16(&v) {
return false
}
m.cipherSuites = append(m.cipherSuites, v)
if v == scsvRenegotiation {
m.secureRenegotiation = []byte{}
}
}
m.nextProtoNeg = false
m.serverName = ""
m.ocspStapling = false
m.keyShares = nil
m.pskIdentities = nil
m.hasEarlyData = false
m.ticketSupported = false
m.sessionTicket = nil
m.signatureAlgorithms = nil
m.signatureAlgorithmsCert = nil
m.supportedVersions = nil
m.alpnProtocols = nil
m.extendedMasterSecret = false
m.customExtension = ""
if len(reader) == 0 {
// ClientHello is optionally followed by extension data
return true
}
var extensions byteReader
if !reader.readU16LengthPrefixed(&extensions) || len(reader) != 0 || !checkDuplicateExtensions(extensions) {
return false
}
for len(extensions) > 0 {
var extension uint16
var body byteReader
if !extensions.readU16(&extension) ||
!extensions.readU16LengthPrefixed(&body) {
return false
}
switch extension {
case extensionServerName:
var names byteReader
if !body.readU16LengthPrefixed(&names) || len(body) != 0 {
return false
}
for len(names) > 0 {
var nameType byte
var name []byte
if !names.readU8(&nameType) ||
!names.readU16LengthPrefixedBytes(&name) {
return false
}
if nameType == 0 {
m.serverName = string(name)
}
}
case extensionNextProtoNeg:
if len(body) != 0 {
return false
}
m.nextProtoNeg = true
case extensionStatusRequest:
m.ocspStapling = len(body) > 0 && body[0] == statusTypeOCSP
case extensionSupportedCurves:
// http://tools.ietf.org/html/rfc4492#section-5.5.1
var curves byteReader
if !body.readU16LengthPrefixed(&curves) || len(body) != 0 {
return false
}
m.supportedCurves = make([]CurveID, 0, len(curves)/2)
for len(curves) > 0 {
var v uint16
if !curves.readU16(&v) {
return false
}
m.supportedCurves = append(m.supportedCurves, CurveID(v))
}
case extensionSupportedPoints:
// http://tools.ietf.org/html/rfc4492#section-5.5.2
if !body.readU8LengthPrefixedBytes(&m.supportedPoints) || len(body) != 0 {
return false
}
case extensionSessionTicket:
// http://tools.ietf.org/html/rfc5077#section-3.2
m.ticketSupported = true
m.sessionTicket = []byte(body)
case extensionKeyShare:
// https://tools.ietf.org/html/rfc8446#section-4.2.8
m.hasKeyShares = true
m.keySharesRaw = body
var keyShares byteReader
if !body.readU16LengthPrefixed(&keyShares) || len(body) != 0 {
return false
}
for len(keyShares) > 0 {
var entry keyShareEntry
var group uint16
if !keyShares.readU16(&group) ||
!keyShares.readU16LengthPrefixedBytes(&entry.keyExchange) {
return false
}
entry.group = CurveID(group)
m.keyShares = append(m.keyShares, entry)
}
case extensionPreSharedKey:
// https://tools.ietf.org/html/rfc8446#section-4.2.11
var psks, binders byteReader
if !body.readU16LengthPrefixed(&psks) ||
!body.readU16LengthPrefixed(&binders) ||
len(body) != 0 {
return false
}
for len(psks) > 0 {
var psk pskIdentity
if !psks.readU16LengthPrefixedBytes(&psk.ticket) ||
!psks.readU32(&psk.obfuscatedTicketAge) {
return false
}
m.pskIdentities = append(m.pskIdentities, psk)
}
for len(binders) > 0 {
var binder []byte
if !binders.readU8LengthPrefixedBytes(&binder) {
return false
}
m.pskBinders = append(m.pskBinders, binder)
}
// There must be the same number of identities as binders.
if len(m.pskIdentities) != len(m.pskBinders) {
return false
}
case extensionPSKKeyExchangeModes:
// https://tools.ietf.org/html/rfc8446#section-4.2.9
if !body.readU8LengthPrefixedBytes(&m.pskKEModes) || len(body) != 0 {
return false
}
case extensionEarlyData:
// https://tools.ietf.org/html/rfc8446#section-4.2.10
if len(body) != 0 {
return false
}
m.hasEarlyData = true
case extensionCookie:
if !body.readU16LengthPrefixedBytes(&m.tls13Cookie) || len(body) != 0 {
return false
}
case extensionSignatureAlgorithms:
// https://tools.ietf.org/html/rfc5246#section-7.4.1.4.1
if !parseSignatureAlgorithms(&body, &m.signatureAlgorithms, false) || len(body) != 0 {
return false
}
case extensionSignatureAlgorithmsCert:
if !parseSignatureAlgorithms(&body, &m.signatureAlgorithmsCert, false) || len(body) != 0 {
return false
}
case extensionSupportedVersions:
var versions byteReader
if !body.readU8LengthPrefixed(&versions) || len(body) != 0 {
return false
}
m.supportedVersions = make([]uint16, 0, len(versions)/2)
for len(versions) > 0 {
var v uint16
if !versions.readU16(&v) {
return false
}
m.supportedVersions = append(m.supportedVersions, v)
}
case extensionRenegotiationInfo:
if !body.readU8LengthPrefixedBytes(&m.secureRenegotiation) || len(body) != 0 {
return false
}
case extensionALPN:
var protocols byteReader
if !body.readU16LengthPrefixed(&protocols) || len(body) != 0 {
return false
}
for len(protocols) > 0 {
var protocol []byte
if !protocols.readU8LengthPrefixedBytes(&protocol) {
return false
}
m.alpnProtocols = append(m.alpnProtocols, string(protocol))
}
case extensionQUICTransportParams:
m.quicTransportParams = body
case extensionChannelID:
if len(body) != 0 {
return false
}
m.channelIDSupported = true
case extensionTokenBinding:
if !body.readU16(&m.tokenBindingVersion) ||
!body.readU8LengthPrefixedBytes(&m.tokenBindingParams) ||
len(body) != 0 {
return false
}
case extensionExtendedMasterSecret:
if len(body) != 0 {
return false
}
m.extendedMasterSecret = true
case extensionUseSRTP:
var profiles byteReader
var mki []byte
if !body.readU16LengthPrefixed(&profiles) ||
!body.readU8LengthPrefixedBytes(&mki) ||
len(body) != 0 {
return false
}
m.srtpProtectionProfiles = make([]uint16, 0, len(profiles)/2)
for len(profiles) > 0 {
var v uint16
if !profiles.readU16(&v) {
return false
}
m.srtpProtectionProfiles = append(m.srtpProtectionProfiles, v)
}
m.srtpMasterKeyIdentifier = string(mki)
case extensionSignedCertificateTimestamp:
if len(body) != 0 {
return false
}
m.sctListSupported = true
case extensionCustom:
m.customExtension = string(body)
case extensionCompressedCertAlgs:
var algIDs byteReader
if !body.readU8LengthPrefixed(&algIDs) {
return false
}
seen := make(map[uint16]struct{})
for len(algIDs) > 0 {
var algID uint16
if !algIDs.readU16(&algID) {
return false
}
if _, ok := seen[algID]; ok {
return false
}
seen[algID] = struct{}{}
m.compressedCertAlgs = append(m.compressedCertAlgs, algID)
}
case extensionPadding:
// Padding bytes must be all zero.
for _, b := range body {
if b != 0 {
return false
}
}
}
if isGREASEValue(extension) {
m.hasGREASEExtension = true
}
}
return true
}
type serverHelloMsg struct {
raw []byte
isDTLS bool
vers uint16
versOverride uint16
supportedVersOverride uint16
omitSupportedVers bool
random []byte
sessionId []byte
cipherSuite uint16
hasKeyShare bool
keyShare keyShareEntry
hasPSKIdentity bool
pskIdentity uint16
compressionMethod uint8
customExtension string
unencryptedALPN string
omitExtensions bool
emptyExtensions bool
extensions serverExtensions
}
func (m *serverHelloMsg) marshal() []byte {
if m.raw != nil {
return m.raw
}
handshakeMsg := newByteBuilder()
handshakeMsg.addU8(typeServerHello)
hello := handshakeMsg.addU24LengthPrefixed()
// m.vers is used both to determine the format of the rest of the
// ServerHello and to override the value, so include a second version
// field.
vers, ok := wireToVersion(m.vers, m.isDTLS)
if !ok {
panic("unknown version")
}
if m.versOverride != 0 {
hello.addU16(m.versOverride)
} else if vers >= VersionTLS13 {
hello.addU16(VersionTLS12)
} else {
hello.addU16(m.vers)
}
hello.addBytes(m.random)
sessionId := hello.addU8LengthPrefixed()
sessionId.addBytes(m.sessionId)
hello.addU16(m.cipherSuite)
hello.addU8(m.compressionMethod)
extensions := hello.addU16LengthPrefixed()
if vers >= VersionTLS13 {
if m.hasKeyShare {
extensions.addU16(extensionKeyShare)
keyShare := extensions.addU16LengthPrefixed()
keyShare.addU16(uint16(m.keyShare.group))
keyExchange := keyShare.addU16LengthPrefixed()
keyExchange.addBytes(m.keyShare.keyExchange)
}
if m.hasPSKIdentity {
extensions.addU16(extensionPreSharedKey)
extensions.addU16(2) // Length
extensions.addU16(m.pskIdentity)
}
if !m.omitSupportedVers {
extensions.addU16(extensionSupportedVersions)
extensions.addU16(2) // Length
if m.supportedVersOverride != 0 {
extensions.addU16(m.supportedVersOverride)
} else {
extensions.addU16(m.vers)
}
}
if len(m.customExtension) > 0 {
extensions.addU16(extensionCustom)
customExt := extensions.addU16LengthPrefixed()
customExt.addBytes([]byte(m.customExtension))
}
if len(m.unencryptedALPN) > 0 {
extensions.addU16(extensionALPN)
extension := extensions.addU16LengthPrefixed()
protocolNameList := extension.addU16LengthPrefixed()
protocolName := protocolNameList.addU8LengthPrefixed()
protocolName.addBytes([]byte(m.unencryptedALPN))
}
} else {
m.extensions.marshal(extensions)
if m.omitExtensions || m.emptyExtensions {
// Silently erasing server extensions will break the handshake. Instead,
// assert that tests which use this field also disable all features which
// would write an extension.
if extensions.len() != 0 {
panic(fmt.Sprintf("ServerHello unexpectedly contained extensions: %x, %+v", extensions.data(), m))
}
hello.discardChild()
if m.emptyExtensions {
hello.addU16(0)
}
}
}
m.raw = handshakeMsg.finish()
return m.raw
}
func (m *serverHelloMsg) unmarshal(data []byte) bool {
m.raw = data
reader := byteReader(data[4:])
if !reader.readU16(&m.vers) ||
!reader.readBytes(&m.random, 32) {
return false
}
vers, ok := wireToVersion(m.vers, m.isDTLS)
if !ok {
return false
}
if !reader.readU8LengthPrefixedBytes(&m.sessionId) ||
!reader.readU16(&m.cipherSuite) ||
!reader.readU8(&m.compressionMethod) {
return false
}
if len(reader) == 0 && m.vers < VersionTLS13 {
// Extension data is optional before TLS 1.3.
m.extensions = serverExtensions{}
m.omitExtensions = true
return true
}
var extensions byteReader
if !reader.readU16LengthPrefixed(&extensions) || len(reader) != 0 || !checkDuplicateExtensions(extensions) {
return false
}
// Parse out the version from supported_versions if available.
if m.vers == VersionTLS12 {
extensionsCopy := extensions
for len(extensionsCopy) > 0 {
var extension uint16
var body byteReader
if !extensionsCopy.readU16(&extension) ||
!extensionsCopy.readU16LengthPrefixed(&body) {
return false
}
if extension == extensionSupportedVersions {
if !body.readU16(&m.vers) || len(body) != 0 {
return false
}
vers, ok = wireToVersion(m.vers, m.isDTLS)
if !ok {
return false
}
}
}
}
if vers >= VersionTLS13 {
for len(extensions) > 0 {
var extension uint16
var body byteReader
if !extensions.readU16(&extension) ||
!extensions.readU16LengthPrefixed(&body) {
return false
}
switch extension {
case extensionKeyShare:
m.hasKeyShare = true
var group uint16
if !body.readU16(&group) ||
!body.readU16LengthPrefixedBytes(&m.keyShare.keyExchange) ||
len(body) != 0 {
return false
}
m.keyShare.group = CurveID(group)
case extensionPreSharedKey:
if !body.readU16(&m.pskIdentity) || len(body) != 0 {
return false
}
m.hasPSKIdentity = true
case extensionSupportedVersions:
// Parsed above.
default:
// Only allow the 3 extensions that are sent in
// the clear in TLS 1.3.
return false
}
}
} else if !m.extensions.unmarshal(extensions, vers) {
return false
}
return true
}
type encryptedExtensionsMsg struct {
raw []byte
extensions serverExtensions
empty bool
}
func (m *encryptedExtensionsMsg) marshal() []byte {
if m.raw != nil {
return m.raw
}
encryptedExtensionsMsg := newByteBuilder()
encryptedExtensionsMsg.addU8(typeEncryptedExtensions)
encryptedExtensions := encryptedExtensionsMsg.addU24LengthPrefixed()
if !m.empty {
extensions := encryptedExtensions.addU16LengthPrefixed()
m.extensions.marshal(extensions)
}
m.raw = encryptedExtensionsMsg.finish()
return m.raw
}
func (m *encryptedExtensionsMsg) unmarshal(data []byte) bool {
m.raw = data
reader := byteReader(data[4:])
var extensions byteReader
if !reader.readU16LengthPrefixed(&extensions) || len(reader) != 0 {
return false
}
return m.extensions.unmarshal(extensions, VersionTLS13)
}
type serverExtensions struct {
nextProtoNeg bool
nextProtos []string
ocspStapling bool
ticketSupported bool
secureRenegotiation []byte
alpnProtocol string
alpnProtocolEmpty bool
duplicateExtension bool
channelIDRequested bool
tokenBindingParams []byte
tokenBindingVersion uint16
extendedMasterSecret bool
srtpProtectionProfile uint16
srtpMasterKeyIdentifier string
sctList []byte
customExtension string
npnAfterAlpn bool
hasKeyShare bool
hasEarlyData bool
keyShare keyShareEntry
supportedVersion uint16
supportedPoints []uint8
supportedCurves []CurveID
quicTransportParams []byte
serverNameAck bool
}
func (m *serverExtensions) marshal(extensions *byteBuilder) {
if m.duplicateExtension {
// Add a duplicate bogus extension at the beginning and end.
extensions.addU16(0xffff)
extensions.addU16(0) // length = 0 for empty extension
}
if m.nextProtoNeg && !m.npnAfterAlpn {
extensions.addU16(extensionNextProtoNeg)
extension := extensions.addU16LengthPrefixed()
for _, v := range m.nextProtos {
if len(v) > 255 {
v = v[:255]
}
npn := extension.addU8LengthPrefixed()
npn.addBytes([]byte(v))
}
}
if m.ocspStapling {
extensions.addU16(extensionStatusRequest)
extensions.addU16(0)
}
if m.ticketSupported {
extensions.addU16(extensionSessionTicket)
extensions.addU16(0)
}
if m.secureRenegotiation != nil {
extensions.addU16(extensionRenegotiationInfo)
extension := extensions.addU16LengthPrefixed()
secureRenego := extension.addU8LengthPrefixed()
secureRenego.addBytes(m.secureRenegotiation)
}
if len(m.alpnProtocol) > 0 || m.alpnProtocolEmpty {
extensions.addU16(extensionALPN)
extension := extensions.addU16LengthPrefixed()
protocolNameList := extension.addU16LengthPrefixed()
protocolName := protocolNameList.addU8LengthPrefixed()
protocolName.addBytes([]byte(m.alpnProtocol))
}
if m.channelIDRequested {
extensions.addU16(extensionChannelID)
extensions.addU16(0)
}
if m.tokenBindingParams != nil {
extensions.addU16(extensionTokenBinding)
tokbindExtension := extensions.addU16LengthPrefixed()
tokbindExtension.addU16(m.tokenBindingVersion)
tokbindParams := tokbindExtension.addU8LengthPrefixed()
tokbindParams.addBytes(m.tokenBindingParams)
}
if m.duplicateExtension {
// Add a duplicate bogus extension at the beginning and end.
extensions.addU16(0xffff)
extensions.addU16(0)
}
if m.extendedMasterSecret {
extensions.addU16(extensionExtendedMasterSecret)
extensions.addU16(0)
}
if m.srtpProtectionProfile != 0 {
extensions.addU16(extensionUseSRTP)
extension := extensions.addU16LengthPrefixed()
srtpProtectionProfiles := extension.addU16LengthPrefixed()
srtpProtectionProfiles.addU16(m.srtpProtectionProfile)
srtpMki := extension.addU8LengthPrefixed()
srtpMki.addBytes([]byte(m.srtpMasterKeyIdentifier))
}
if m.sctList != nil {
extensions.addU16(extensionSignedCertificateTimestamp)
extension := extensions.addU16LengthPrefixed()
extension.addBytes(m.sctList)
}
if l := len(m.customExtension); l > 0 {
extensions.addU16(extensionCustom)
customExt := extensions.addU16LengthPrefixed()
customExt.addBytes([]byte(m.customExtension))
}
if m.nextProtoNeg && m.npnAfterAlpn {
extensions.addU16(extensionNextProtoNeg)
extension := extensions.addU16LengthPrefixed()
for _, v := range m.nextProtos {
if len(v) > 255 {
v = v[0:255]
}
npn := extension.addU8LengthPrefixed()
npn.addBytes([]byte(v))
}
}
if m.hasKeyShare {
extensions.addU16(extensionKeyShare)
keyShare := extensions.addU16LengthPrefixed()
keyShare.addU16(uint16(m.keyShare.group))
keyExchange := keyShare.addU16LengthPrefixed()
keyExchange.addBytes(m.keyShare.keyExchange)
}
if m.supportedVersion != 0 {
extensions.addU16(extensionSupportedVersions)
extensions.addU16(2) // Length
extensions.addU16(m.supportedVersion)
}
if len(m.supportedPoints) > 0 {
// http://tools.ietf.org/html/rfc4492#section-5.1.2
extensions.addU16(extensionSupportedPoints)
supportedPointsList := extensions.addU16LengthPrefixed()
supportedPoints := supportedPointsList.addU8LengthPrefixed()
supportedPoints.addBytes(m.supportedPoints)
}
if len(m.supportedCurves) > 0 {
// https://tools.ietf.org/html/rfc8446#section-4.2.7
extensions.addU16(extensionSupportedCurves)
supportedCurvesList := extensions.addU16LengthPrefixed()
supportedCurves := supportedCurvesList.addU16LengthPrefixed()
for _, curve := range m.supportedCurves {
supportedCurves.addU16(uint16(curve))
}
}
if len(m.quicTransportParams) > 0 {
extensions.addU16(extensionQUICTransportParams)
params := extensions.addU16LengthPrefixed()
params.addBytes(m.quicTransportParams)
}
if m.hasEarlyData {
extensions.addU16(extensionEarlyData)
extensions.addBytes([]byte{0, 0})
}
if m.serverNameAck {
extensions.addU16(extensionServerName)
extensions.addU16(0) // zero length
}
}
func (m *serverExtensions) unmarshal(data byteReader, version uint16) bool {
// Reset all fields.
*m = serverExtensions{}
if !checkDuplicateExtensions(data) {
return false
}
for len(data) > 0 {
var extension uint16
var body byteReader
if !data.readU16(&extension) ||
!data.readU16LengthPrefixed(&body) {
return false
}
switch extension {
case extensionNextProtoNeg:
m.nextProtoNeg = true
for len(body) > 0 {
var protocol []byte
if !body.readU8LengthPrefixedBytes(&protocol) {
return false
}
m.nextProtos = append(m.nextProtos, string(protocol))
}
case extensionStatusRequest:
if len(body) != 0 {
return false
}
m.ocspStapling = true
case extensionSessionTicket:
if len(body) != 0 {
return false
}
m.ticketSupported = true
case extensionRenegotiationInfo:
if !body.readU8LengthPrefixedBytes(&m.secureRenegotiation) || len(body) != 0 {
return false
}
case extensionALPN:
var protocols, protocol byteReader
if !body.readU16LengthPrefixed(&protocols) ||
len(body) != 0 ||
!protocols.readU8LengthPrefixed(&protocol) ||
len(protocols) != 0 {
return false
}
m.alpnProtocol = string(protocol)
m.alpnProtocolEmpty = len(protocol) == 0
case extensionChannelID:
if len(body) != 0 {
return false
}
m.channelIDRequested = true
case extensionTokenBinding:
if !body.readU16(&m.tokenBindingVersion) ||
!body.readU8LengthPrefixedBytes(&m.tokenBindingParams) ||
len(m.tokenBindingParams) != 1 ||
len(body) != 0 {
return false
}
case extensionExtendedMasterSecret:
if len(body) != 0 {
return false
}
m.extendedMasterSecret = true
case extensionUseSRTP:
var profiles, mki byteReader
if !body.readU16LengthPrefixed(&profiles) ||
!profiles.readU16(&m.srtpProtectionProfile) ||
len(profiles) != 0 ||
!body.readU8LengthPrefixed(&mki) ||
len(body) != 0 {
return false
}
m.srtpMasterKeyIdentifier = string(mki)
case extensionSignedCertificateTimestamp:
m.sctList = []byte(body)
case extensionCustom:
m.customExtension = string(body)
case extensionServerName:
if len(body) != 0 {
return false
}
m.serverNameAck = true
case extensionSupportedPoints:
// supported_points is illegal in TLS 1.3.
if version >= VersionTLS13 {
return false
}
// http://tools.ietf.org/html/rfc4492#section-5.5.2
if !body.readU8LengthPrefixedBytes(&m.supportedPoints) || len(body) != 0 {
return false
}
case extensionSupportedCurves:
// The server can only send supported_curves in TLS 1.3.
if version < VersionTLS13 {
return false
}
case extensionQUICTransportParams:
m.quicTransportParams = body
case extensionEarlyData:
if version < VersionTLS13 || len(body) != 0 {
return false
}
m.hasEarlyData = true
default:
// Unknown extensions are illegal from the server.
return false
}
}
return true
}
type helloRetryRequestMsg struct {
raw []byte
vers uint16
isServerHello bool
sessionId []byte
cipherSuite uint16
compressionMethod uint8
hasSelectedGroup bool
selectedGroup CurveID
cookie []byte
customExtension string
duplicateExtensions bool
}
func (m *helloRetryRequestMsg) marshal() []byte {
if m.raw != nil {
return m.raw
}
retryRequestMsg := newByteBuilder()
retryRequestMsg.addU8(typeServerHello)
retryRequest := retryRequestMsg.addU24LengthPrefixed()
retryRequest.addU16(VersionTLS12)
retryRequest.addBytes(tls13HelloRetryRequest)
sessionId := retryRequest.addU8LengthPrefixed()
sessionId.addBytes(m.sessionId)
retryRequest.addU16(m.cipherSuite)
retryRequest.addU8(m.compressionMethod)
extensions := retryRequest.addU16LengthPrefixed()
count := 1
if m.duplicateExtensions {
count = 2
}
for i := 0; i < count; i++ {
extensions.addU16(extensionSupportedVersions)
extensions.addU16(2) // Length
extensions.addU16(m.vers)
if m.hasSelectedGroup {
extensions.addU16(extensionKeyShare)
extensions.addU16(2) // length
extensions.addU16(uint16(m.selectedGroup))
}
// m.cookie may be a non-nil empty slice for empty cookie tests.
if m.cookie != nil {
extensions.addU16(extensionCookie)
body := extensions.addU16LengthPrefixed()
body.addU16LengthPrefixed().addBytes(m.cookie)
}
if len(m.customExtension) > 0 {
extensions.addU16(extensionCustom)
extensions.addU16LengthPrefixed().addBytes([]byte(m.customExtension))
}
}
m.raw = retryRequestMsg.finish()
return m.raw
}
func (m *helloRetryRequestMsg) unmarshal(data []byte) bool {
m.raw = data
reader := byteReader(data[4:])
if !reader.readU16(&m.vers) {
return false
}
if m.isServerHello {
var random []byte
var compressionMethod byte
if !reader.readBytes(&random, 32) ||
!reader.readU8LengthPrefixedBytes(&m.sessionId) ||
!reader.readU16(&m.cipherSuite) ||
!reader.readU8(&compressionMethod) ||
compressionMethod != 0 {
return false
}
} else if !reader.readU16(&m.cipherSuite) {
return false
}
var extensions byteReader
if !reader.readU16LengthPrefixed(&extensions) || len(reader) != 0 {
return false
}
extensionsCopy := extensions
for len(extensionsCopy) > 0 {
var extension uint16
var body byteReader
if !extensionsCopy.readU16(&extension) ||
!extensionsCopy.readU16LengthPrefixed(&body) {
return false
}
switch extension {
case extensionSupportedVersions:
if !m.isServerHello ||
!body.readU16(&m.vers) ||
len(body) != 0 {
return false
}
default:
}
}
for len(extensions) > 0 {
var extension uint16
var body byteReader
if !extensions.readU16(&extension) ||
!extensions.readU16LengthPrefixed(&body) {
return false
}
switch extension {
case extensionSupportedVersions:
// Parsed above.
case extensionKeyShare:
var v uint16
if !body.readU16(&v) || len(body) != 0 {
return false
}
m.hasSelectedGroup = true
m.selectedGroup = CurveID(v)
case extensionCookie:
if !body.readU16LengthPrefixedBytes(&m.cookie) || len(body) != 0 {
return false
}
default:
// Unknown extensions are illegal from the server.
return false
}
}
return true
}
type certificateEntry struct {
data []byte
ocspResponse []byte
sctList []byte
duplicateExtensions bool
extraExtension []byte
}
type certificateMsg struct {
raw []byte
hasRequestContext bool
requestContext []byte
certificates []certificateEntry
}
func (m *certificateMsg) marshal() (x []byte) {
if m.raw != nil {
return m.raw
}
certMsg := newByteBuilder()
certMsg.addU8(typeCertificate)
certificate := certMsg.addU24LengthPrefixed()
if m.hasRequestContext {
context := certificate.addU8LengthPrefixed()
context.addBytes(m.requestContext)
}
certificateList := certificate.addU24LengthPrefixed()
for _, cert := range m.certificates {
certEntry := certificateList.addU24LengthPrefixed()
certEntry.addBytes(cert.data)
if m.hasRequestContext {
extensions := certificateList.addU16LengthPrefixed()
count := 1
if cert.duplicateExtensions {
count = 2
}
for i := 0; i < count; i++ {
if cert.ocspResponse != nil {
extensions.addU16(extensionStatusRequest)
body := extensions.addU16LengthPrefixed()
body.addU8(statusTypeOCSP)
response := body.addU24LengthPrefixed()
response.addBytes(cert.ocspResponse)
}
if cert.sctList != nil {
extensions.addU16(extensionSignedCertificateTimestamp)
extension := extensions.addU16LengthPrefixed()
extension.addBytes(cert.sctList)
}
}
if cert.extraExtension != nil {
extensions.addBytes(cert.extraExtension)
}
}
}
m.raw = certMsg.finish()
return m.raw
}
func (m *certificateMsg) unmarshal(data []byte) bool {
m.raw = data
reader := byteReader(data[4:])
if m.hasRequestContext && !reader.readU8LengthPrefixedBytes(&m.requestContext) {
return false
}
var certs byteReader
if !reader.readU24LengthPrefixed(&certs) || len(reader) != 0 {
return false
}
m.certificates = nil
for len(certs) > 0 {
var cert certificateEntry
if !certs.readU24LengthPrefixedBytes(&cert.data) {
return false
}
if m.hasRequestContext {
var extensions byteReader
if !certs.readU16LengthPrefixed(&extensions) || !checkDuplicateExtensions(extensions) {
return false
}
for len(extensions) > 0 {
var extension uint16
var body byteReader
if !extensions.readU16(&extension) ||
!extensions.readU16LengthPrefixed(&body) {
return false
}
switch extension {
case extensionStatusRequest:
var statusType byte
if !body.readU8(&statusType) ||
statusType != statusTypeOCSP ||
!body.readU24LengthPrefixedBytes(&cert.ocspResponse) ||
len(body) != 0 {
return false
}
case extensionSignedCertificateTimestamp:
cert.sctList = []byte(body)
default:
return false
}
}
}
m.certificates = append(m.certificates, cert)
}
return true
}
type compressedCertificateMsg struct {
raw []byte
algID uint16
uncompressedLength uint32
compressed []byte
}
func (m *compressedCertificateMsg) marshal() (x []byte) {
if m.raw != nil {
return m.raw
}
certMsg := newByteBuilder()
certMsg.addU8(typeCompressedCertificate)
certificate := certMsg.addU24LengthPrefixed()
certificate.addU16(m.algID)
certificate.addU24(int(m.uncompressedLength))
compressed := certificate.addU24LengthPrefixed()
compressed.addBytes(m.compressed)
m.raw = certMsg.finish()
return m.raw
}
func (m *compressedCertificateMsg) unmarshal(data []byte) bool {
m.raw = data
reader := byteReader(data[4:])
if !reader.readU16(&m.algID) ||
!reader.readU24(&m.uncompressedLength) ||
!reader.readU24LengthPrefixedBytes(&m.compressed) ||
len(reader) != 0 {
return false
}
if m.uncompressedLength >= 1<<17 {
return false
}
return true
}
type serverKeyExchangeMsg struct {
raw []byte
key []byte
}
func (m *serverKeyExchangeMsg) marshal() []byte {
if m.raw != nil {
return m.raw
}
msg := newByteBuilder()
msg.addU8(typeServerKeyExchange)
msg.addU24LengthPrefixed().addBytes(m.key)
m.raw = msg.finish()
return m.raw
}
func (m *serverKeyExchangeMsg) unmarshal(data []byte) bool {
m.raw = data
if len(data) < 4 {
return false
}
m.key = data[4:]
return true
}
type certificateStatusMsg struct {
raw []byte
statusType uint8
response []byte
}
func (m *certificateStatusMsg) marshal() []byte {
if m.raw != nil {
return m.raw
}
var x []byte
if m.statusType == statusTypeOCSP {
msg := newByteBuilder()
msg.addU8(typeCertificateStatus)
body := msg.addU24LengthPrefixed()
body.addU8(statusTypeOCSP)
body.addU24LengthPrefixed().addBytes(m.response)
x = msg.finish()
} else {
x = []byte{typeCertificateStatus, 0, 0, 1, m.statusType}
}
m.raw = x
return x
}
func (m *certificateStatusMsg) unmarshal(data []byte) bool {
m.raw = data
reader := byteReader(data[4:])
if !reader.readU8(&m.statusType) ||
m.statusType != statusTypeOCSP ||
!reader.readU24LengthPrefixedBytes(&m.response) ||
len(reader) != 0 {
return false
}
return true
}
type serverHelloDoneMsg struct{}
func (m *serverHelloDoneMsg) marshal() []byte {
x := make([]byte, 4)
x[0] = typeServerHelloDone
return x
}
func (m *serverHelloDoneMsg) unmarshal(data []byte) bool {
return len(data) == 4
}
type clientKeyExchangeMsg struct {
raw []byte
ciphertext []byte
}
func (m *clientKeyExchangeMsg) marshal() []byte {
if m.raw != nil {
return m.raw
}
msg := newByteBuilder()
msg.addU8(typeClientKeyExchange)
msg.addU24LengthPrefixed().addBytes(m.ciphertext)
m.raw = msg.finish()
return m.raw
}
func (m *clientKeyExchangeMsg) unmarshal(data []byte) bool {
m.raw = data
if len(data) < 4 {
return false
}
l := int(data[1])<<16 | int(data[2])<<8 | int(data[3])
if l != len(data)-4 {
return false
}
m.ciphertext = data[4:]
return true
}
type finishedMsg struct {
raw []byte
verifyData []byte
}
func (m *finishedMsg) marshal() []byte {
if m.raw != nil {
return m.raw
}
msg := newByteBuilder()
msg.addU8(typeFinished)
msg.addU24LengthPrefixed().addBytes(m.verifyData)
m.raw = msg.finish()
return m.raw
}
func (m *finishedMsg) unmarshal(data []byte) bool {
m.raw = data
if len(data) < 4 {
return false
}
m.verifyData = data[4:]
return true
}
type nextProtoMsg struct {
raw []byte
proto string
}
func (m *nextProtoMsg) marshal() []byte {
if m.raw != nil {
return m.raw
}
padding := 32 - (len(m.proto)+2)%32
msg := newByteBuilder()
msg.addU8(typeNextProtocol)
body := msg.addU24LengthPrefixed()
body.addU8LengthPrefixed().addBytes([]byte(m.proto))
body.addU8LengthPrefixed().addBytes(make([]byte, padding))
m.raw = msg.finish()
return m.raw
}
func (m *nextProtoMsg) unmarshal(data []byte) bool {
m.raw = data
reader := byteReader(data[4:])
var proto, padding []byte
if !reader.readU8LengthPrefixedBytes(&proto) ||
!reader.readU8LengthPrefixedBytes(&padding) ||
len(reader) != 0 {
return false
}
m.proto = string(proto)
// Padding is not meant to be checked normally, but as this is a testing
// implementation, we check the padding is as expected.
if len(padding) != 32-(len(m.proto)+2)%32 {
return false
}
for _, v := range padding {
if v != 0 {
return false
}
}
return true
}
type certificateRequestMsg struct {
raw []byte
vers uint16
// hasSignatureAlgorithm indicates whether this message includes a list
// of signature and hash functions. This change was introduced with TLS
// 1.2.
hasSignatureAlgorithm bool
// hasRequestContext indicates whether this message includes a context
// field instead of certificateTypes. This change was introduced with
// TLS 1.3.
hasRequestContext bool
certificateTypes []byte
requestContext []byte
signatureAlgorithms []signatureAlgorithm
signatureAlgorithmsCert []signatureAlgorithm
certificateAuthorities [][]byte
hasCAExtension bool
customExtension uint16
}
func (m *certificateRequestMsg) marshal() []byte {
if m.raw != nil {
return m.raw
}
// See http://tools.ietf.org/html/rfc4346#section-7.4.4
builder := newByteBuilder()
builder.addU8(typeCertificateRequest)
body := builder.addU24LengthPrefixed()
if m.hasRequestContext {
requestContext := body.addU8LengthPrefixed()
requestContext.addBytes(m.requestContext)
extensions := newByteBuilder()
extensions = body.addU16LengthPrefixed()
if m.hasSignatureAlgorithm {
extensions.addU16(extensionSignatureAlgorithms)
signatureAlgorithms := extensions.addU16LengthPrefixed().addU16LengthPrefixed()
for _, sigAlg := range m.signatureAlgorithms {
signatureAlgorithms.addU16(uint16(sigAlg))
}
}
if len(m.signatureAlgorithmsCert) > 0 {
extensions.addU16(extensionSignatureAlgorithmsCert)
signatureAlgorithmsCert := extensions.addU16LengthPrefixed().addU16LengthPrefixed()
for _, sigAlg := range m.signatureAlgorithmsCert {
signatureAlgorithmsCert.addU16(uint16(sigAlg))
}
}
if len(m.certificateAuthorities) > 0 {
extensions.addU16(extensionCertificateAuthorities)
certificateAuthorities := extensions.addU16LengthPrefixed().addU16LengthPrefixed()
for _, ca := range m.certificateAuthorities {
caEntry := certificateAuthorities.addU16LengthPrefixed()
caEntry.addBytes(ca)
}
}
if m.customExtension > 0 {
extensions.addU16(m.customExtension)
extensions.addU16LengthPrefixed()
}
} else {
certificateTypes := body.addU8LengthPrefixed()
certificateTypes.addBytes(m.certificateTypes)
if m.hasSignatureAlgorithm {
signatureAlgorithms := body.addU16LengthPrefixed()
for _, sigAlg := range m.signatureAlgorithms {
signatureAlgorithms.addU16(uint16(sigAlg))
}
}
certificateAuthorities := body.addU16LengthPrefixed()
for _, ca := range m.certificateAuthorities {
caEntry := certificateAuthorities.addU16LengthPrefixed()
caEntry.addBytes(ca)
}
}
m.raw = builder.finish()
return m.raw
}
func parseCAs(reader *byteReader, out *[][]byte) bool {
var cas byteReader
if !reader.readU16LengthPrefixed(&cas) {
return false
}
for len(cas) > 0 {
var ca []byte
if !cas.readU16LengthPrefixedBytes(&ca) {
return false
}
*out = append(*out, ca)
}
return true
}
func (m *certificateRequestMsg) unmarshal(data []byte) bool {
m.raw = data
reader := byteReader(data[4:])
if m.hasRequestContext {
var extensions byteReader
if !reader.readU8LengthPrefixedBytes(&m.requestContext) ||
!reader.readU16LengthPrefixed(&extensions) ||
len(reader) != 0 ||
!checkDuplicateExtensions(extensions) {
return false
}
for len(extensions) > 0 {
var extension uint16
var body byteReader
if !extensions.readU16(&extension) ||
!extensions.readU16LengthPrefixed(&body) {
return false
}
switch extension {
case extensionSignatureAlgorithms:
if !parseSignatureAlgorithms(&body, &m.signatureAlgorithms, false) || len(body) != 0 {
return false
}
case extensionSignatureAlgorithmsCert:
if !parseSignatureAlgorithms(&body, &m.signatureAlgorithmsCert, false) || len(body) != 0 {
return false
}
case extensionCertificateAuthorities:
if !parseCAs(&body, &m.certificateAuthorities) || len(body) != 0 {
return false
}
m.hasCAExtension = true
}
}
} else {
if !reader.readU8LengthPrefixedBytes(&m.certificateTypes) {
return false
}
// In TLS 1.2, the supported_signature_algorithms field in
// CertificateRequest may be empty.
if m.hasSignatureAlgorithm && !parseSignatureAlgorithms(&reader, &m.signatureAlgorithms, true) {
return false
}
if !parseCAs(&reader, &m.certificateAuthorities) ||
len(reader) != 0 {
return false
}
}
return true
}
type certificateVerifyMsg struct {
raw []byte
hasSignatureAlgorithm bool
signatureAlgorithm signatureAlgorithm
signature []byte
}
func (m *certificateVerifyMsg) marshal() (x []byte) {
if m.raw != nil {
return m.raw
}
// See http://tools.ietf.org/html/rfc4346#section-7.4.8
siglength := len(m.signature)
length := 2 + siglength
if m.hasSignatureAlgorithm {
length += 2
}
x = make([]byte, 4+length)
x[0] = typeCertificateVerify
x[1] = uint8(length >> 16)
x[2] = uint8(length >> 8)
x[3] = uint8(length)
y := x[4:]
if m.hasSignatureAlgorithm {
y[0] = byte(m.signatureAlgorithm >> 8)
y[1] = byte(m.signatureAlgorithm)
y = y[2:]
}
y[0] = uint8(siglength >> 8)
y[1] = uint8(siglength)
copy(y[2:], m.signature)
m.raw = x
return
}
func (m *certificateVerifyMsg) unmarshal(data []byte) bool {
m.raw = data
if len(data) < 6 {
return false
}
length := uint32(data[1])<<16 | uint32(data[2])<<8 | uint32(data[3])
if uint32(len(data))-4 != length {
return false
}
data = data[4:]
if m.hasSignatureAlgorithm {
m.signatureAlgorithm = signatureAlgorithm(data[0])<<8 | signatureAlgorithm(data[1])
data = data[2:]
}
if len(data) < 2 {
return false
}
siglength := int(data[0])<<8 + int(data[1])
data = data[2:]
if len(data) != siglength {
return false
}
m.signature = data
return true
}
type newSessionTicketMsg struct {
raw []byte
vers uint16
isDTLS bool
ticketLifetime uint32
ticketAgeAdd uint32
ticketNonce []byte
ticket []byte
maxEarlyDataSize uint32
customExtension string
duplicateEarlyDataExtension bool
hasGREASEExtension bool
}
func (m *newSessionTicketMsg) marshal() []byte {
if m.raw != nil {
return m.raw
}
version, ok := wireToVersion(m.vers, m.isDTLS)
if !ok {
panic("unknown version")
}
// See http://tools.ietf.org/html/rfc5077#section-3.3
ticketMsg := newByteBuilder()
ticketMsg.addU8(typeNewSessionTicket)
body := ticketMsg.addU24LengthPrefixed()
body.addU32(m.ticketLifetime)
if version >= VersionTLS13 {
body.addU32(m.ticketAgeAdd)
body.addU8LengthPrefixed().addBytes(m.ticketNonce)
}
ticket := body.addU16LengthPrefixed()
ticket.addBytes(m.ticket)
if version >= VersionTLS13 {
extensions := body.addU16LengthPrefixed()
if m.maxEarlyDataSize > 0 {
extensions.addU16(extensionEarlyData)
extensions.addU16LengthPrefixed().addU32(m.maxEarlyDataSize)
if m.duplicateEarlyDataExtension {
extensions.addU16(extensionEarlyData)
extensions.addU16LengthPrefixed().addU32(m.maxEarlyDataSize)
}
}
if len(m.customExtension) > 0 {
extensions.addU16(extensionCustom)
extensions.addU16LengthPrefixed().addBytes([]byte(m.customExtension))
}
}
m.raw = ticketMsg.finish()
return m.raw
}
func (m *newSessionTicketMsg) unmarshal(data []byte) bool {
m.raw = data
version, ok := wireToVersion(m.vers, m.isDTLS)
if !ok {
panic("unknown version")
}
if len(data) < 8 {
return false
}
m.ticketLifetime = uint32(data[4])<<24 | uint32(data[5])<<16 | uint32(data[6])<<8 | uint32(data[7])
data = data[8:]
if version >= VersionTLS13 {
if len(data) < 4 {
return false
}
m.ticketAgeAdd = uint32(data[0])<<24 | uint32(data[1])<<16 | uint32(data[2])<<8 | uint32(data[3])
data = data[4:]
nonceLen := int(data[0])
data = data[1:]
if len(data) < nonceLen {
return false
}
m.ticketNonce = data[:nonceLen]
data = data[nonceLen:]
}
if len(data) < 2 {
return false
}
ticketLen := int(data[0])<<8 + int(data[1])
data = data[2:]
if len(data) < ticketLen {
return false
}
if version >= VersionTLS13 && ticketLen == 0 {
return false
}
m.ticket = data[:ticketLen]
data = data[ticketLen:]
if version >= VersionTLS13 {
if len(data) < 2 {
return false
}
extensionsLength := int(data[0])<<8 | int(data[1])
data = data[2:]
if extensionsLength != len(data) {
return false
}
for len(data) != 0 {
if len(data) < 4 {
return false
}
extension := uint16(data[0])<<8 | uint16(data[1])
length := int(data[2])<<8 | int(data[3])
data = data[4:]
if len(data) < length {
return false
}
switch extension {
case extensionEarlyData:
if length != 4 {
return false
}
m.maxEarlyDataSize = uint32(data[0])<<24 | uint32(data[1])<<16 | uint32(data[2])<<8 | uint32(data[3])
default:
if isGREASEValue(extension) {
m.hasGREASEExtension = true
}
}
data = data[length:]
}
}
if len(data) > 0 {
return false
}
return true
}
type v2ClientHelloMsg struct {
raw []byte
vers uint16
cipherSuites []uint16
sessionId []byte
challenge []byte
}
func (m *v2ClientHelloMsg) marshal() []byte {
if m.raw != nil {
return m.raw
}
length := 1 + 2 + 2 + 2 + 2 + len(m.cipherSuites)*3 + len(m.sessionId) + len(m.challenge)
x := make([]byte, length)
x[0] = 1
x[1] = uint8(m.vers >> 8)
x[2] = uint8(m.vers)
x[3] = uint8((len(m.cipherSuites) * 3) >> 8)
x[4] = uint8(len(m.cipherSuites) * 3)
x[5] = uint8(len(m.sessionId) >> 8)
x[6] = uint8(len(m.sessionId))
x[7] = uint8(len(m.challenge) >> 8)
x[8] = uint8(len(m.challenge))
y := x[9:]
for i, spec := range m.cipherSuites {
y[i*3] = 0
y[i*3+1] = uint8(spec >> 8)
y[i*3+2] = uint8(spec)
}
y = y[len(m.cipherSuites)*3:]
copy(y, m.sessionId)
y = y[len(m.sessionId):]
copy(y, m.challenge)
m.raw = x
return x
}
type helloVerifyRequestMsg struct {
raw []byte
vers uint16
cookie []byte
}
func (m *helloVerifyRequestMsg) marshal() []byte {
if m.raw != nil {
return m.raw
}
length := 2 + 1 + len(m.cookie)
x := make([]byte, 4+length)
x[0] = typeHelloVerifyRequest
x[1] = uint8(length >> 16)
x[2] = uint8(length >> 8)
x[3] = uint8(length)
vers := m.vers
x[4] = uint8(vers >> 8)
x[5] = uint8(vers)
x[6] = uint8(len(m.cookie))
copy(x[7:7+len(m.cookie)], m.cookie)
return x
}
func (m *helloVerifyRequestMsg) unmarshal(data []byte) bool {
if len(data) < 4+2+1 {
return false
}
m.raw = data
m.vers = uint16(data[4])<<8 | uint16(data[5])
cookieLen := int(data[6])
if cookieLen > 32 || len(data) != 7+cookieLen {
return false
}
m.cookie = data[7 : 7+cookieLen]
return true
}
type channelIDMsg struct {
raw []byte
channelID []byte
}
func (m *channelIDMsg) marshal() []byte {
if m.raw != nil {
return m.raw
}
length := 2 + 2 + len(m.channelID)
x := make([]byte, 4+length)
x[0] = typeChannelID
x[1] = uint8(length >> 16)
x[2] = uint8(length >> 8)
x[3] = uint8(length)
x[4] = uint8(extensionChannelID >> 8)
x[5] = uint8(extensionChannelID & 0xff)
x[6] = uint8(len(m.channelID) >> 8)
x[7] = uint8(len(m.channelID) & 0xff)
copy(x[8:], m.channelID)
return x
}
func (m *channelIDMsg) unmarshal(data []byte) bool {
if len(data) != 4+2+2+128 {
return false
}
m.raw = data
if (uint16(data[4])<<8)|uint16(data[5]) != extensionChannelID {
return false
}
if int(data[6])<<8|int(data[7]) != 128 {
return false
}
m.channelID = data[4+2+2:]
return true
}
type helloRequestMsg struct {
}
func (*helloRequestMsg) marshal() []byte {
return []byte{typeHelloRequest, 0, 0, 0}
}
func (*helloRequestMsg) unmarshal(data []byte) bool {
return len(data) == 4
}
type keyUpdateMsg struct {
raw []byte
keyUpdateRequest byte
}
func (m *keyUpdateMsg) marshal() []byte {
if m.raw != nil {
return m.raw
}
return []byte{typeKeyUpdate, 0, 0, 1, m.keyUpdateRequest}
}
func (m *keyUpdateMsg) unmarshal(data []byte) bool {
m.raw = data
if len(data) != 5 {
return false
}
length := int(data[1])<<16 | int(data[2])<<8 | int(data[3])
if len(data)-4 != length {
return false
}
m.keyUpdateRequest = data[4]
return m.keyUpdateRequest == keyUpdateNotRequested || m.keyUpdateRequest == keyUpdateRequested
}
type endOfEarlyDataMsg struct {
nonEmpty bool
}
func (m *endOfEarlyDataMsg) marshal() []byte {
if m.nonEmpty {
return []byte{typeEndOfEarlyData, 0, 0, 1, 42}
}
return []byte{typeEndOfEarlyData, 0, 0, 0}
}
func (*endOfEarlyDataMsg) unmarshal(data []byte) bool {
return len(data) == 4
}
// ssl3NoCertificateMsg is a dummy message to handle SSL 3.0 using a warning
// alert in the handshake.
type ssl3NoCertificateMsg struct{}
func eqUint16s(x, y []uint16) bool {
if len(x) != len(y) {
return false
}
for i, v := range x {
if y[i] != v {
return false
}
}
return true
}
func eqCurveIDs(x, y []CurveID) bool {
if len(x) != len(y) {
return false
}
for i, v := range x {
if y[i] != v {
return false
}
}
return true
}
func eqStrings(x, y []string) bool {
if len(x) != len(y) {
return false
}
for i, v := range x {
if y[i] != v {
return false
}
}
return true
}
func eqByteSlices(x, y [][]byte) bool {
if len(x) != len(y) {
return false
}
for i, v := range x {
if !bytes.Equal(v, y[i]) {
return false
}
}
return true
}
func eqSignatureAlgorithms(x, y []signatureAlgorithm) bool {
if len(x) != len(y) {
return false
}
for i, v := range x {
v2 := y[i]
if v != v2 {
return false
}
}
return true
}
func eqKeyShareEntryLists(x, y []keyShareEntry) bool {
if len(x) != len(y) {
return false
}
for i, v := range x {
if y[i].group != v.group || !bytes.Equal(y[i].keyExchange, v.keyExchange) {
return false
}
}
return true
}
func eqPSKIdentityLists(x, y []pskIdentity) bool {
if len(x) != len(y) {
return false
}
for i, v := range x {
if !bytes.Equal(y[i].ticket, v.ticket) || y[i].obfuscatedTicketAge != v.obfuscatedTicketAge {
return false
}
}
return true
}
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