ref: 27c85c0da4eff0e69d9482544cf217686b762d9c
dir: /third_party/boringssl/src/ssl/test/runner/handshake_messages.go/
// 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 (
"errors"
"fmt"
"golang.org/x/crypto/cryptobyte"
)
func readUint8LengthPrefixedBytes(s *cryptobyte.String, out *[]byte) bool {
var child cryptobyte.String
if !s.ReadUint8LengthPrefixed(&child) {
return false
}
*out = child
return true
}
func readUint16LengthPrefixedBytes(s *cryptobyte.String, out *[]byte) bool {
var child cryptobyte.String
if !s.ReadUint16LengthPrefixed(&child) {
return false
}
*out = child
return true
}
func readUint24LengthPrefixedBytes(s *cryptobyte.String, out *[]byte) bool {
var child cryptobyte.String
if !s.ReadUint24LengthPrefixed(&child) {
return false
}
*out = child
return true
}
func addUint8LengthPrefixedBytes(b *cryptobyte.Builder, v []byte) {
b.AddUint8LengthPrefixed(func(child *cryptobyte.Builder) { child.AddBytes(v) })
}
func addUint16LengthPrefixedBytes(b *cryptobyte.Builder, v []byte) {
b.AddUint16LengthPrefixed(func(child *cryptobyte.Builder) { child.AddBytes(v) })
}
func addUint24LengthPrefixedBytes(b *cryptobyte.Builder, v []byte) {
b.AddUint24LengthPrefixed(func(child *cryptobyte.Builder) { child.AddBytes(v) })
}
type keyShareEntry struct {
group CurveID
keyExchange []byte
}
type pskIdentity struct {
ticket []uint8
obfuscatedTicketAge uint32
}
type HPKECipherSuite struct {
KDF uint16
AEAD uint16
}
type ECHConfig struct {
Raw []byte
ConfigID uint8
KEM uint16
PublicKey []byte
MaxNameLen uint8
PublicName string
CipherSuites []HPKECipherSuite
// The following fields are only used by CreateECHConfig().
UnsupportedExtension bool
UnsupportedMandatoryExtension bool
}
func CreateECHConfig(template *ECHConfig) *ECHConfig {
bb := cryptobyte.NewBuilder(nil)
// ECHConfig reuses the encrypted_client_hello extension codepoint as a
// version identifier.
bb.AddUint16(extensionEncryptedClientHello)
bb.AddUint16LengthPrefixed(func(contents *cryptobyte.Builder) {
contents.AddUint8(template.ConfigID)
contents.AddUint16(template.KEM)
addUint16LengthPrefixedBytes(contents, template.PublicKey)
contents.AddUint16LengthPrefixed(func(cipherSuites *cryptobyte.Builder) {
for _, suite := range template.CipherSuites {
cipherSuites.AddUint16(suite.KDF)
cipherSuites.AddUint16(suite.AEAD)
}
})
contents.AddUint8(template.MaxNameLen)
addUint8LengthPrefixedBytes(contents, []byte(template.PublicName))
contents.AddUint16LengthPrefixed(func(extensions *cryptobyte.Builder) {
// Mandatory extensions have the high bit set.
if template.UnsupportedExtension {
extensions.AddUint16(0x1111)
addUint16LengthPrefixedBytes(extensions, []byte("test"))
}
if template.UnsupportedMandatoryExtension {
extensions.AddUint16(0xaaaa)
addUint16LengthPrefixedBytes(extensions, []byte("test"))
}
})
})
// This ought to be a call to a function like ParseECHConfig(bb.BytesOrPanic()),
// but this constrains us to constructing ECHConfigs we are willing to
// support. We need to test the client's behavior in response to unparsable
// or unsupported ECHConfigs, so populate fields from the template directly.
ret := *template
ret.Raw = bb.BytesOrPanic()
return &ret
}
func CreateECHConfigList(configs ...[]byte) []byte {
bb := cryptobyte.NewBuilder(nil)
bb.AddUint16LengthPrefixed(func(list *cryptobyte.Builder) {
for _, config := range configs {
list.AddBytes(config)
}
})
return bb.BytesOrPanic()
}
type ServerECHConfig struct {
ECHConfig *ECHConfig
Key []byte
}
const (
echClientTypeOuter byte = 0
echClientTypeInner byte = 1
)
type echClientOuter struct {
kdfID uint16
aeadID uint16
configID uint8
enc []byte
payload []byte
}
type clientHelloMsg struct {
raw []byte
isDTLS bool
isV2ClientHello bool
vers uint16
random []byte
v2Challenge []byte
sessionID []byte
cookie []byte
cipherSuites []uint16
compressionMethods []uint8
nextProtoNeg bool
serverName string
echOuter *echClientOuter
echInner bool
invalidECHInner []byte
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
quicTransportParamsLegacy []byte
duplicateExtension bool
channelIDSupported bool
extendedMasterSecret bool
srtpProtectionProfiles []uint16
srtpMasterKeyIdentifier string
sctListSupported bool
customExtension string
hasGREASEExtension bool
omitExtensions bool
emptyExtensions bool
pad int
compressedCertAlgs []uint16
delegatedCredential []signatureAlgorithm
alpsProtocols []string
alpsProtocolsOld []string
outerExtensions []uint16
reorderOuterExtensionsWithoutCompressing bool
prefixExtensions []uint16
// The following fields are only filled in by |unmarshal| and ignored when
// marshaling a new ClientHello.
echPayloadStart int
echPayloadEnd int
rawExtensions []byte
}
func (m *clientHelloMsg) marshalKeyShares(bb *cryptobyte.Builder) {
bb.AddUint16LengthPrefixed(func(keyShares *cryptobyte.Builder) {
for _, keyShare := range m.keyShares {
keyShares.AddUint16(uint16(keyShare.group))
addUint16LengthPrefixedBytes(keyShares, keyShare.keyExchange)
}
if m.trailingKeyShareData {
keyShares.AddUint8(0)
}
})
}
type clientHelloType int
const (
clientHelloNormal clientHelloType = iota
clientHelloEncodedInner
)
func (m *clientHelloMsg) marshalBody(hello *cryptobyte.Builder, typ clientHelloType) {
hello.AddUint16(m.vers)
hello.AddBytes(m.random)
hello.AddUint8LengthPrefixed(func(sessionID *cryptobyte.Builder) {
if typ != clientHelloEncodedInner {
sessionID.AddBytes(m.sessionID)
}
})
if m.isDTLS {
hello.AddUint8LengthPrefixed(func(cookie *cryptobyte.Builder) {
cookie.AddBytes(m.cookie)
})
}
hello.AddUint16LengthPrefixed(func(cipherSuites *cryptobyte.Builder) {
for _, suite := range m.cipherSuites {
cipherSuites.AddUint16(suite)
}
})
hello.AddUint8LengthPrefixed(func(compressionMethods *cryptobyte.Builder) {
compressionMethods.AddBytes(m.compressionMethods)
})
type extension struct {
id uint16
body []byte
}
var extensions []extension
if m.duplicateExtension {
// Add a duplicate bogus extension at the beginning and end.
extensions = append(extensions, extension{id: extensionDuplicate})
}
if m.nextProtoNeg {
extensions = append(extensions, extension{id: extensionNextProtoNeg})
}
if len(m.serverName) > 0 {
// 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;
serverNameList := cryptobyte.NewBuilder(nil)
serverNameList.AddUint16LengthPrefixed(func(serverName *cryptobyte.Builder) {
serverName.AddUint8(0) // NameType host_name(0)
addUint16LengthPrefixedBytes(serverName, []byte(m.serverName))
})
extensions = append(extensions, extension{
id: extensionServerName,
body: serverNameList.BytesOrPanic(),
})
}
if m.echOuter != nil {
body := cryptobyte.NewBuilder(nil)
body.AddUint8(echClientTypeOuter)
body.AddUint16(m.echOuter.kdfID)
body.AddUint16(m.echOuter.aeadID)
body.AddUint8(m.echOuter.configID)
addUint16LengthPrefixedBytes(body, m.echOuter.enc)
addUint16LengthPrefixedBytes(body, m.echOuter.payload)
extensions = append(extensions, extension{
id: extensionEncryptedClientHello,
body: body.BytesOrPanic(),
})
}
if m.echInner {
body := cryptobyte.NewBuilder(nil)
body.AddUint8(echClientTypeInner)
// If unset, invalidECHInner is empty, which is the correct serialization.
body.AddBytes(m.invalidECHInner)
extensions = append(extensions, extension{
id: extensionEncryptedClientHello,
body: body.BytesOrPanic(),
})
}
if m.ocspStapling {
certificateStatusRequest := cryptobyte.NewBuilder(nil)
// RFC 4366, section 3.6
certificateStatusRequest.AddUint8(1) // OCSP type
// Two zero valued uint16s for the two lengths.
certificateStatusRequest.AddUint16(0) // ResponderID length
certificateStatusRequest.AddUint16(0) // Extensions length
extensions = append(extensions, extension{
id: extensionStatusRequest,
body: certificateStatusRequest.BytesOrPanic(),
})
}
if len(m.supportedCurves) > 0 {
// http://tools.ietf.org/html/rfc4492#section-5.1.1
supportedCurvesList := cryptobyte.NewBuilder(nil)
supportedCurvesList.AddUint16LengthPrefixed(func(supportedCurves *cryptobyte.Builder) {
for _, curve := range m.supportedCurves {
supportedCurves.AddUint16(uint16(curve))
}
})
extensions = append(extensions, extension{
id: extensionSupportedCurves,
body: supportedCurvesList.BytesOrPanic(),
})
}
if len(m.supportedPoints) > 0 {
// http://tools.ietf.org/html/rfc4492#section-5.1.2
supportedPointsList := cryptobyte.NewBuilder(nil)
addUint8LengthPrefixedBytes(supportedPointsList, m.supportedPoints)
extensions = append(extensions, extension{
id: extensionSupportedPoints,
body: supportedPointsList.BytesOrPanic(),
})
}
if m.hasKeyShares {
keyShareList := cryptobyte.NewBuilder(nil)
m.marshalKeyShares(keyShareList)
extensions = append(extensions, extension{
id: extensionKeyShare,
body: keyShareList.BytesOrPanic(),
})
}
if len(m.pskKEModes) > 0 {
pskModesExtension := cryptobyte.NewBuilder(nil)
addUint8LengthPrefixedBytes(pskModesExtension, m.pskKEModes)
extensions = append(extensions, extension{
id: extensionPSKKeyExchangeModes,
body: pskModesExtension.BytesOrPanic(),
})
}
if m.hasEarlyData {
extensions = append(extensions, extension{id: extensionEarlyData})
}
if len(m.tls13Cookie) > 0 {
body := cryptobyte.NewBuilder(nil)
addUint16LengthPrefixedBytes(body, m.tls13Cookie)
extensions = append(extensions, extension{
id: extensionCookie,
body: body.BytesOrPanic(),
})
}
if m.ticketSupported {
// http://tools.ietf.org/html/rfc5077#section-3.2
extensions = append(extensions, extension{
id: extensionSessionTicket,
body: m.sessionTicket,
})
}
if len(m.signatureAlgorithms) > 0 {
// https://tools.ietf.org/html/rfc5246#section-7.4.1.4.1
signatureAlgorithmsExtension := cryptobyte.NewBuilder(nil)
signatureAlgorithmsExtension.AddUint16LengthPrefixed(func(signatureAlgorithms *cryptobyte.Builder) {
for _, sigAlg := range m.signatureAlgorithms {
signatureAlgorithms.AddUint16(uint16(sigAlg))
}
})
extensions = append(extensions, extension{
id: extensionSignatureAlgorithms,
body: signatureAlgorithmsExtension.BytesOrPanic(),
})
}
if len(m.signatureAlgorithmsCert) > 0 {
signatureAlgorithmsCertExtension := cryptobyte.NewBuilder(nil)
signatureAlgorithmsCertExtension.AddUint16LengthPrefixed(func(signatureAlgorithmsCert *cryptobyte.Builder) {
for _, sigAlg := range m.signatureAlgorithmsCert {
signatureAlgorithmsCert.AddUint16(uint16(sigAlg))
}
})
extensions = append(extensions, extension{
id: extensionSignatureAlgorithmsCert,
body: signatureAlgorithmsCertExtension.BytesOrPanic(),
})
}
if len(m.supportedVersions) > 0 {
supportedVersionsExtension := cryptobyte.NewBuilder(nil)
supportedVersionsExtension.AddUint8LengthPrefixed(func(supportedVersions *cryptobyte.Builder) {
for _, version := range m.supportedVersions {
supportedVersions.AddUint16(uint16(version))
}
})
extensions = append(extensions, extension{
id: extensionSupportedVersions,
body: supportedVersionsExtension.BytesOrPanic(),
})
}
if m.secureRenegotiation != nil {
secureRenegoExt := cryptobyte.NewBuilder(nil)
addUint8LengthPrefixedBytes(secureRenegoExt, m.secureRenegotiation)
extensions = append(extensions, extension{
id: extensionRenegotiationInfo,
body: secureRenegoExt.BytesOrPanic(),
})
}
if len(m.alpnProtocols) > 0 {
// https://tools.ietf.org/html/rfc7301#section-3.1
alpnExtension := cryptobyte.NewBuilder(nil)
alpnExtension.AddUint16LengthPrefixed(func(protocolNameList *cryptobyte.Builder) {
for _, s := range m.alpnProtocols {
addUint8LengthPrefixedBytes(protocolNameList, []byte(s))
}
})
extensions = append(extensions, extension{
id: extensionALPN,
body: alpnExtension.BytesOrPanic(),
})
}
if len(m.quicTransportParams) > 0 {
extensions = append(extensions, extension{
id: extensionQUICTransportParams,
body: m.quicTransportParams,
})
}
if len(m.quicTransportParamsLegacy) > 0 {
extensions = append(extensions, extension{
id: extensionQUICTransportParamsLegacy,
body: m.quicTransportParamsLegacy,
})
}
if m.channelIDSupported {
extensions = append(extensions, extension{id: extensionChannelID})
}
if m.duplicateExtension {
// Add a duplicate bogus extension at the beginning and end.
extensions = append(extensions, extension{id: extensionDuplicate})
}
if m.extendedMasterSecret {
// https://tools.ietf.org/html/rfc7627
extensions = append(extensions, extension{id: extensionExtendedMasterSecret})
}
if len(m.srtpProtectionProfiles) > 0 {
// https://tools.ietf.org/html/rfc5764#section-4.1.1
useSrtpExt := cryptobyte.NewBuilder(nil)
useSrtpExt.AddUint16LengthPrefixed(func(srtpProtectionProfiles *cryptobyte.Builder) {
for _, p := range m.srtpProtectionProfiles {
srtpProtectionProfiles.AddUint16(p)
}
})
addUint8LengthPrefixedBytes(useSrtpExt, []byte(m.srtpMasterKeyIdentifier))
extensions = append(extensions, extension{
id: extensionUseSRTP,
body: useSrtpExt.BytesOrPanic(),
})
}
if m.sctListSupported {
extensions = append(extensions, extension{id: extensionSignedCertificateTimestamp})
}
if len(m.customExtension) > 0 {
extensions = append(extensions, extension{
id: extensionCustom,
body: []byte(m.customExtension),
})
}
if len(m.compressedCertAlgs) > 0 {
body := cryptobyte.NewBuilder(nil)
body.AddUint8LengthPrefixed(func(algIDs *cryptobyte.Builder) {
for _, v := range m.compressedCertAlgs {
algIDs.AddUint16(v)
}
})
extensions = append(extensions, extension{
id: extensionCompressedCertAlgs,
body: body.BytesOrPanic(),
})
}
if len(m.delegatedCredential) > 0 {
body := cryptobyte.NewBuilder(nil)
body.AddUint16LengthPrefixed(func(signatureSchemeList *cryptobyte.Builder) {
for _, sigAlg := range m.delegatedCredential {
signatureSchemeList.AddUint16(uint16(sigAlg))
}
})
extensions = append(extensions, extension{
id: extensionDelegatedCredential,
body: body.BytesOrPanic(),
})
}
if len(m.alpsProtocols) > 0 {
body := cryptobyte.NewBuilder(nil)
body.AddUint16LengthPrefixed(func(protocolNameList *cryptobyte.Builder) {
for _, s := range m.alpsProtocols {
addUint8LengthPrefixedBytes(protocolNameList, []byte(s))
}
})
extensions = append(extensions, extension{
id: extensionApplicationSettings,
body: body.BytesOrPanic(),
})
}
if len(m.alpsProtocolsOld) > 0 {
body := cryptobyte.NewBuilder(nil)
body.AddUint16LengthPrefixed(func(protocolNameList *cryptobyte.Builder) {
for _, s := range m.alpsProtocolsOld {
addUint8LengthPrefixedBytes(protocolNameList, []byte(s))
}
})
extensions = append(extensions, extension{
id: extensionApplicationSettingsOld,
body: body.BytesOrPanic(),
})
}
// The PSK extension must be last. See https://tools.ietf.org/html/rfc8446#section-4.2.11
if len(m.pskIdentities) > 0 {
pskExtension := cryptobyte.NewBuilder(nil)
pskExtension.AddUint16LengthPrefixed(func(pskIdentities *cryptobyte.Builder) {
for _, psk := range m.pskIdentities {
addUint16LengthPrefixedBytes(pskIdentities, psk.ticket)
pskIdentities.AddUint32(psk.obfuscatedTicketAge)
}
})
pskExtension.AddUint16LengthPrefixed(func(pskBinders *cryptobyte.Builder) {
for _, binder := range m.pskBinders {
addUint8LengthPrefixedBytes(pskBinders, binder)
}
})
extensions = append(extensions, extension{
id: extensionPreSharedKey,
body: pskExtension.BytesOrPanic(),
})
}
if m.omitExtensions {
return
}
hello.AddUint16LengthPrefixed(func(extensionsBB *cryptobyte.Builder) {
if m.emptyExtensions {
return
}
extMap := make(map[uint16][]byte)
extsWritten := make(map[uint16]struct{})
for _, ext := range extensions {
extMap[ext.id] = ext.body
}
// Write each of the prefix extensions, if we have it.
for _, extID := range m.prefixExtensions {
if body, ok := extMap[extID]; ok {
extensionsBB.AddUint16(extID)
addUint16LengthPrefixedBytes(extensionsBB, body)
extsWritten[extID] = struct{}{}
}
}
// Write outer extensions, possibly in compressed form.
if m.outerExtensions != nil {
if typ == clientHelloEncodedInner && !m.reorderOuterExtensionsWithoutCompressing {
extensionsBB.AddUint16(extensionECHOuterExtensions)
extensionsBB.AddUint16LengthPrefixed(func(child *cryptobyte.Builder) {
child.AddUint8LengthPrefixed(func(list *cryptobyte.Builder) {
for _, extID := range m.outerExtensions {
list.AddUint16(extID)
extsWritten[extID] = struct{}{}
}
})
})
} else {
for _, extID := range m.outerExtensions {
// m.outerExtensions may intentionally contain duplicates to test the
// server's reaction. If m.reorderOuterExtensionsWithoutCompressing
// is set, we are targetting the second ClientHello and wish to send a
// valid first ClientHello. In that case, deduplicate so the error
// only appears later.
if _, written := extsWritten[extID]; m.reorderOuterExtensionsWithoutCompressing && written {
continue
}
if body, ok := extMap[extID]; ok {
extensionsBB.AddUint16(extID)
addUint16LengthPrefixedBytes(extensionsBB, body)
extsWritten[extID] = struct{}{}
}
}
}
}
// Write each of the remaining extensions in their original order.
for _, ext := range extensions {
if _, written := extsWritten[ext.id]; !written {
extensionsBB.AddUint16(ext.id)
addUint16LengthPrefixedBytes(extensionsBB, ext.body)
}
}
if m.pad != 0 && len(hello.BytesOrPanic())%m.pad != 0 {
extensionsBB.AddUint16(extensionPadding)
extensionsBB.AddUint16LengthPrefixed(func(padding *cryptobyte.Builder) {
// Note hello.len() has changed at this point from the length
// prefix.
if l := len(hello.BytesOrPanic()) % m.pad; l != 0 {
padding.AddBytes(make([]byte, m.pad-l))
}
})
}
})
}
func (m *clientHelloMsg) marshalForEncodedInner() []byte {
hello := cryptobyte.NewBuilder(nil)
m.marshalBody(hello, clientHelloEncodedInner)
return hello.BytesOrPanic()
}
func (m *clientHelloMsg) marshal() []byte {
if m.raw != nil {
return m.raw
}
if m.isV2ClientHello {
v2Msg := cryptobyte.NewBuilder(nil)
v2Msg.AddUint8(1)
v2Msg.AddUint16(m.vers)
v2Msg.AddUint16(uint16(len(m.cipherSuites) * 3))
v2Msg.AddUint16(uint16(len(m.sessionID)))
v2Msg.AddUint16(uint16(len(m.v2Challenge)))
for _, spec := range m.cipherSuites {
v2Msg.AddUint24(uint32(spec))
}
v2Msg.AddBytes(m.sessionID)
v2Msg.AddBytes(m.v2Challenge)
m.raw = v2Msg.BytesOrPanic()
return m.raw
}
handshakeMsg := cryptobyte.NewBuilder(nil)
handshakeMsg.AddUint8(typeClientHello)
handshakeMsg.AddUint24LengthPrefixed(func(hello *cryptobyte.Builder) {
m.marshalBody(hello, clientHelloNormal)
})
m.raw = handshakeMsg.BytesOrPanic()
// 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 *cryptobyte.String, out *[]signatureAlgorithm, allowEmpty bool) bool {
var sigAlgs cryptobyte.String
if !reader.ReadUint16LengthPrefixed(&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.ReadUint16(&v) {
return false
}
if signatureAlgorithm(v) == signatureRSAPKCS1WithMD5AndSHA1 {
// signatureRSAPKCS1WithMD5AndSHA1 is an internal value BoringSSL
// uses to represent the TLS 1.0 MD5/SHA-1 concatenation. It should
// never appear on the wire.
return false
}
*out = append(*out, signatureAlgorithm(v))
}
return true
}
func checkDuplicateExtensions(extensions cryptobyte.String) bool {
seen := make(map[uint16]struct{})
for len(extensions) > 0 {
var extension uint16
var body cryptobyte.String
if !extensions.ReadUint16(&extension) ||
!extensions.ReadUint16LengthPrefixed(&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 := cryptobyte.String(data[4:])
if !reader.ReadUint16(&m.vers) ||
!reader.ReadBytes(&m.random, 32) ||
!readUint8LengthPrefixedBytes(&reader, &m.sessionID) ||
len(m.sessionID) > 32 {
return false
}
if m.isDTLS && !readUint8LengthPrefixedBytes(&reader, &m.cookie) {
return false
}
var cipherSuites cryptobyte.String
if !reader.ReadUint16LengthPrefixed(&cipherSuites) ||
!readUint8LengthPrefixedBytes(&reader, &m.compressionMethods) {
return false
}
m.cipherSuites = make([]uint16, 0, len(cipherSuites)/2)
for len(cipherSuites) > 0 {
var v uint16
if !cipherSuites.ReadUint16(&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 = ""
m.delegatedCredential = nil
m.alpsProtocols = nil
m.alpsProtocolsOld = nil
if len(reader) == 0 {
// ClientHello is optionally followed by extension data
return true
}
var extensions cryptobyte.String
if !reader.ReadUint16LengthPrefixed(&extensions) || len(reader) != 0 || !checkDuplicateExtensions(extensions) {
return false
}
m.rawExtensions = extensions
for len(extensions) > 0 {
var extension uint16
var body cryptobyte.String
if !extensions.ReadUint16(&extension) ||
!extensions.ReadUint16LengthPrefixed(&body) {
return false
}
switch extension {
case extensionServerName:
var names cryptobyte.String
if !body.ReadUint16LengthPrefixed(&names) || len(body) != 0 {
return false
}
for len(names) > 0 {
var nameType byte
var name []byte
if !names.ReadUint8(&nameType) ||
!readUint16LengthPrefixedBytes(&names, &name) {
return false
}
if nameType == 0 {
m.serverName = string(name)
}
}
case extensionEncryptedClientHello:
var typ byte
if !body.ReadUint8(&typ) {
return false
}
switch typ {
case echClientTypeOuter:
var echOuter echClientOuter
if !body.ReadUint16(&echOuter.kdfID) ||
!body.ReadUint16(&echOuter.aeadID) ||
!body.ReadUint8(&echOuter.configID) ||
!readUint16LengthPrefixedBytes(&body, &echOuter.enc) ||
!readUint16LengthPrefixedBytes(&body, &echOuter.payload) ||
len(echOuter.payload) == 0 ||
len(body) > 0 {
return false
}
m.echOuter = &echOuter
m.echPayloadEnd = len(data) - len(extensions)
m.echPayloadStart = m.echPayloadEnd - len(echOuter.payload)
case echClientTypeInner:
if len(body) > 0 {
return false
}
m.echInner = true
default:
return false
}
case extensionNextProtoNeg:
if len(body) != 0 {
return false
}
m.nextProtoNeg = true
case extensionStatusRequest:
// This parse is stricter than a production implementation would
// use. The status_request extension has many layers of interior
// extensibility, but we expect our client to only send empty
// requests of type OCSP.
var statusType uint8
var responderIDList, innerExtensions cryptobyte.String
if !body.ReadUint8(&statusType) ||
statusType != statusTypeOCSP ||
!body.ReadUint16LengthPrefixed(&responderIDList) ||
!body.ReadUint16LengthPrefixed(&innerExtensions) ||
len(responderIDList) != 0 ||
len(innerExtensions) != 0 ||
len(body) != 0 {
return false
}
m.ocspStapling = true
case extensionSupportedCurves:
// http://tools.ietf.org/html/rfc4492#section-5.5.1
var curves cryptobyte.String
if !body.ReadUint16LengthPrefixed(&curves) || len(body) != 0 {
return false
}
m.supportedCurves = make([]CurveID, 0, len(curves)/2)
for len(curves) > 0 {
var v uint16
if !curves.ReadUint16(&v) {
return false
}
m.supportedCurves = append(m.supportedCurves, CurveID(v))
}
case extensionSupportedPoints:
// http://tools.ietf.org/html/rfc4492#section-5.1.2
if !readUint8LengthPrefixedBytes(&body, &m.supportedPoints) || len(m.supportedPoints) == 0 || 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 cryptobyte.String
if !body.ReadUint16LengthPrefixed(&keyShares) || len(body) != 0 {
return false
}
for len(keyShares) > 0 {
var entry keyShareEntry
var group uint16
if !keyShares.ReadUint16(&group) ||
!readUint16LengthPrefixedBytes(&keyShares, &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 cryptobyte.String
if !body.ReadUint16LengthPrefixed(&psks) ||
!body.ReadUint16LengthPrefixed(&binders) ||
len(body) != 0 {
return false
}
for len(psks) > 0 {
var psk pskIdentity
if !readUint16LengthPrefixedBytes(&psks, &psk.ticket) ||
!psks.ReadUint32(&psk.obfuscatedTicketAge) {
return false
}
m.pskIdentities = append(m.pskIdentities, psk)
}
for len(binders) > 0 {
var binder []byte
if !readUint8LengthPrefixedBytes(&binders, &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 !readUint8LengthPrefixedBytes(&body, &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 !readUint16LengthPrefixedBytes(&body, &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 cryptobyte.String
if !body.ReadUint8LengthPrefixed(&versions) || len(body) != 0 {
return false
}
m.supportedVersions = make([]uint16, 0, len(versions)/2)
for len(versions) > 0 {
var v uint16
if !versions.ReadUint16(&v) {
return false
}
m.supportedVersions = append(m.supportedVersions, v)
}
case extensionRenegotiationInfo:
if !readUint8LengthPrefixedBytes(&body, &m.secureRenegotiation) || len(body) != 0 {
return false
}
case extensionALPN:
var protocols cryptobyte.String
if !body.ReadUint16LengthPrefixed(&protocols) || len(body) != 0 {
return false
}
for len(protocols) > 0 {
var protocol []byte
if !readUint8LengthPrefixedBytes(&protocols, &protocol) || len(protocol) == 0 {
return false
}
m.alpnProtocols = append(m.alpnProtocols, string(protocol))
}
case extensionQUICTransportParams:
m.quicTransportParams = body
case extensionQUICTransportParamsLegacy:
m.quicTransportParamsLegacy = body
case extensionChannelID:
if len(body) != 0 {
return false
}
m.channelIDSupported = true
case extensionExtendedMasterSecret:
if len(body) != 0 {
return false
}
m.extendedMasterSecret = true
case extensionUseSRTP:
var profiles cryptobyte.String
var mki []byte
if !body.ReadUint16LengthPrefixed(&profiles) ||
!readUint8LengthPrefixedBytes(&body, &mki) ||
len(body) != 0 {
return false
}
m.srtpProtectionProfiles = make([]uint16, 0, len(profiles)/2)
for len(profiles) > 0 {
var v uint16
if !profiles.ReadUint16(&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 cryptobyte.String
if !body.ReadUint8LengthPrefixed(&algIDs) {
return false
}
seen := make(map[uint16]struct{})
for len(algIDs) > 0 {
var algID uint16
if !algIDs.ReadUint16(&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
}
}
case extensionDelegatedCredential:
if !parseSignatureAlgorithms(&body, &m.delegatedCredential, false) || len(body) != 0 {
return false
}
case extensionApplicationSettings:
var protocols cryptobyte.String
if !body.ReadUint16LengthPrefixed(&protocols) || len(body) != 0 {
return false
}
for len(protocols) > 0 {
var protocol []byte
if !readUint8LengthPrefixedBytes(&protocols, &protocol) || len(protocol) == 0 {
return false
}
m.alpsProtocols = append(m.alpsProtocols, string(protocol))
}
case extensionApplicationSettingsOld:
var protocols cryptobyte.String
if !body.ReadUint16LengthPrefixed(&protocols) || len(body) != 0 {
return false
}
for len(protocols) > 0 {
var protocol []byte
if !readUint8LengthPrefixedBytes(&protocols, &protocol) || len(protocol) == 0 {
return false
}
m.alpsProtocolsOld = append(m.alpsProtocolsOld, string(protocol))
}
}
if isGREASEValue(extension) {
m.hasGREASEExtension = true
}
}
return true
}
func decodeClientHelloInner(config *Config, encoded []byte, helloOuter *clientHelloMsg) (*clientHelloMsg, error) {
reader := cryptobyte.String(encoded)
var versAndRandom, sessionID, cipherSuites, compressionMethods []byte
var extensions cryptobyte.String
if !reader.ReadBytes(&versAndRandom, 2+32) ||
!readUint8LengthPrefixedBytes(&reader, &sessionID) ||
len(sessionID) != 0 || // Copied from |helloOuter|
!readUint16LengthPrefixedBytes(&reader, &cipherSuites) ||
!readUint8LengthPrefixedBytes(&reader, &compressionMethods) ||
!reader.ReadUint16LengthPrefixed(&extensions) {
return nil, errors.New("tls: error parsing EncodedClientHelloInner")
}
// The remainder of the structure is padding.
for _, padding := range reader {
if padding != 0 {
return nil, errors.New("tls: non-zero padding in EncodedClientHelloInner")
}
}
copied := make(map[uint16]struct{})
builder := cryptobyte.NewBuilder(nil)
builder.AddUint8(typeClientHello)
builder.AddUint24LengthPrefixed(func(body *cryptobyte.Builder) {
body.AddBytes(versAndRandom)
addUint8LengthPrefixedBytes(body, helloOuter.sessionID)
addUint16LengthPrefixedBytes(body, cipherSuites)
addUint8LengthPrefixedBytes(body, compressionMethods)
body.AddUint16LengthPrefixed(func(newExtensions *cryptobyte.Builder) {
var seenOuterExtensions bool
outerExtensions := cryptobyte.String(helloOuter.rawExtensions)
for len(extensions) > 0 {
var extType uint16
var extBody cryptobyte.String
if !extensions.ReadUint16(&extType) ||
!extensions.ReadUint16LengthPrefixed(&extBody) {
newExtensions.SetError(errors.New("tls: error parsing EncodedClientHelloInner"))
return
}
if extType != extensionECHOuterExtensions {
newExtensions.AddUint16(extType)
addUint16LengthPrefixedBytes(newExtensions, extBody)
continue
}
if seenOuterExtensions {
newExtensions.SetError(errors.New("tls: duplicate ech_outer_extensions extension"))
return
}
seenOuterExtensions = true
var extList cryptobyte.String
if !extBody.ReadUint8LengthPrefixed(&extList) || len(extList) == 0 || len(extBody) != 0 {
newExtensions.SetError(errors.New("tls: error parsing ech_outer_extensions"))
return
}
for len(extList) != 0 {
var newExtType uint16
if !extList.ReadUint16(&newExtType) {
newExtensions.SetError(errors.New("tls: error parsing ech_outer_extensions"))
return
}
if newExtType == extensionEncryptedClientHello {
newExtensions.SetError(errors.New("tls: error parsing ech_outer_extensions"))
return
}
for {
if len(outerExtensions) == 0 {
newExtensions.SetError(fmt.Errorf("tls: extension %d not found in ClientHelloOuter", newExtType))
return
}
var foundExt uint16
var newExtBody []byte
if !outerExtensions.ReadUint16(&foundExt) ||
!readUint16LengthPrefixedBytes(&outerExtensions, &newExtBody) {
newExtensions.SetError(errors.New("tls: error parsing ClientHelloOuter"))
return
}
if foundExt == newExtType {
newExtensions.AddUint16(newExtType)
addUint16LengthPrefixedBytes(newExtensions, newExtBody)
copied[newExtType] = struct{}{}
break
}
}
}
}
})
})
bytes, err := builder.Bytes()
if err != nil {
return nil, err
}
for _, expected := range config.Bugs.ExpectECHOuterExtensions {
if _, ok := copied[expected]; !ok {
return nil, fmt.Errorf("tls: extension %d not found in ech_outer_extensions", expected)
}
}
for _, expected := range config.Bugs.ExpectECHUncompressedExtensions {
if _, ok := copied[expected]; ok {
return nil, fmt.Errorf("tls: extension %d unexpectedly found in ech_outer_extensions", expected)
}
}
ret := new(clientHelloMsg)
if !ret.unmarshal(bytes) {
return nil, errors.New("tls: error parsing reconstructed ClientHello")
}
return ret, nil
}
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 := cryptobyte.NewBuilder(nil)
handshakeMsg.AddUint8(typeServerHello)
handshakeMsg.AddUint24LengthPrefixed(func(hello *cryptobyte.Builder) {
// 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.AddUint16(m.versOverride)
} else if vers >= VersionTLS13 {
legacyVersion := uint16(VersionTLS12)
if m.isDTLS {
legacyVersion = VersionDTLS12
}
hello.AddUint16(legacyVersion)
} else {
hello.AddUint16(m.vers)
}
hello.AddBytes(m.random)
addUint8LengthPrefixedBytes(hello, m.sessionID)
hello.AddUint16(m.cipherSuite)
hello.AddUint8(m.compressionMethod)
hello.AddUint16LengthPrefixed(func(extensions *cryptobyte.Builder) {
if vers >= VersionTLS13 {
if m.hasKeyShare {
extensions.AddUint16(extensionKeyShare)
extensions.AddUint16LengthPrefixed(func(keyShare *cryptobyte.Builder) {
keyShare.AddUint16(uint16(m.keyShare.group))
addUint16LengthPrefixedBytes(keyShare, m.keyShare.keyExchange)
})
}
if m.hasPSKIdentity {
extensions.AddUint16(extensionPreSharedKey)
extensions.AddUint16(2) // Length
extensions.AddUint16(m.pskIdentity)
}
if !m.omitSupportedVers {
extensions.AddUint16(extensionSupportedVersions)
extensions.AddUint16(2) // Length
if m.supportedVersOverride != 0 {
extensions.AddUint16(m.supportedVersOverride)
} else {
extensions.AddUint16(m.vers)
}
}
if len(m.customExtension) > 0 {
extensions.AddUint16(extensionCustom)
addUint16LengthPrefixedBytes(extensions, []byte(m.customExtension))
}
if len(m.unencryptedALPN) > 0 {
extensions.AddUint16(extensionALPN)
extensions.AddUint16LengthPrefixed(func(extension *cryptobyte.Builder) {
extension.AddUint16LengthPrefixed(func(protocolNameList *cryptobyte.Builder) {
addUint8LengthPrefixedBytes(protocolNameList, []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. Note the length includes the length prefix.
if b := extensions.BytesOrPanic(); len(b) != 2 {
panic(fmt.Sprintf("ServerHello unexpectedly contained extensions: %x, %+v", b, m))
}
}
})
// Remove the length prefix.
if m.omitExtensions {
hello.Unwrite(2)
}
})
m.raw = handshakeMsg.BytesOrPanic()
return m.raw
}
func (m *serverHelloMsg) unmarshal(data []byte) bool {
m.raw = data
reader := cryptobyte.String(data[4:])
if !reader.ReadUint16(&m.vers) ||
!reader.ReadBytes(&m.random, 32) {
return false
}
vers, ok := wireToVersion(m.vers, m.isDTLS)
if !ok {
return false
}
if !readUint8LengthPrefixedBytes(&reader, &m.sessionID) ||
!reader.ReadUint16(&m.cipherSuite) ||
!reader.ReadUint8(&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 cryptobyte.String
if !reader.ReadUint16LengthPrefixed(&extensions) || len(reader) != 0 || !checkDuplicateExtensions(extensions) {
return false
}
// Parse out the version from supported_versions if available.
if vers == VersionTLS12 {
extensionsCopy := extensions
for len(extensionsCopy) > 0 {
var extension uint16
var body cryptobyte.String
if !extensionsCopy.ReadUint16(&extension) ||
!extensionsCopy.ReadUint16LengthPrefixed(&body) {
return false
}
if extension == extensionSupportedVersions {
if !body.ReadUint16(&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 cryptobyte.String
if !extensions.ReadUint16(&extension) ||
!extensions.ReadUint16LengthPrefixed(&body) {
return false
}
switch extension {
case extensionKeyShare:
m.hasKeyShare = true
var group uint16
if !body.ReadUint16(&group) ||
!readUint16LengthPrefixedBytes(&body, &m.keyShare.keyExchange) ||
len(body) != 0 {
return false
}
m.keyShare.group = CurveID(group)
case extensionPreSharedKey:
if !body.ReadUint16(&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 := cryptobyte.NewBuilder(nil)
encryptedExtensionsMsg.AddUint8(typeEncryptedExtensions)
encryptedExtensionsMsg.AddUint24LengthPrefixed(func(encryptedExtensions *cryptobyte.Builder) {
if !m.empty {
encryptedExtensions.AddUint16LengthPrefixed(func(extensions *cryptobyte.Builder) {
m.extensions.marshal(extensions)
})
}
})
m.raw = encryptedExtensionsMsg.BytesOrPanic()
return m.raw
}
func (m *encryptedExtensionsMsg) unmarshal(data []byte) bool {
m.raw = data
reader := cryptobyte.String(data[4:])
var extensions cryptobyte.String
if !reader.ReadUint16LengthPrefixed(&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
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
quicTransportParamsLegacy []byte
serverNameAck bool
applicationSettings []byte
hasApplicationSettings bool
applicationSettingsOld []byte
hasApplicationSettingsOld bool
echRetryConfigs []byte
}
func (m *serverExtensions) marshal(extensions *cryptobyte.Builder) {
if m.duplicateExtension {
// Add a duplicate bogus extension at the beginning and end.
extensions.AddUint16(extensionDuplicate)
extensions.AddUint16(0) // length = 0 for empty extension
}
if m.nextProtoNeg && !m.npnAfterAlpn {
extensions.AddUint16(extensionNextProtoNeg)
extensions.AddUint16LengthPrefixed(func(extension *cryptobyte.Builder) {
for _, v := range m.nextProtos {
addUint8LengthPrefixedBytes(extension, []byte(v))
}
})
}
if m.ocspStapling {
extensions.AddUint16(extensionStatusRequest)
extensions.AddUint16(0)
}
if m.ticketSupported {
extensions.AddUint16(extensionSessionTicket)
extensions.AddUint16(0)
}
if m.secureRenegotiation != nil {
extensions.AddUint16(extensionRenegotiationInfo)
extensions.AddUint16LengthPrefixed(func(extension *cryptobyte.Builder) {
addUint8LengthPrefixedBytes(extension, m.secureRenegotiation)
})
}
if len(m.alpnProtocol) > 0 || m.alpnProtocolEmpty {
extensions.AddUint16(extensionALPN)
extensions.AddUint16LengthPrefixed(func(extension *cryptobyte.Builder) {
extension.AddUint16LengthPrefixed(func(protocolNameList *cryptobyte.Builder) {
addUint8LengthPrefixedBytes(protocolNameList, []byte(m.alpnProtocol))
})
})
}
if m.channelIDRequested {
extensions.AddUint16(extensionChannelID)
extensions.AddUint16(0)
}
if m.duplicateExtension {
// Add a duplicate bogus extension at the beginning and end.
extensions.AddUint16(extensionDuplicate)
extensions.AddUint16(0)
}
if m.extendedMasterSecret {
extensions.AddUint16(extensionExtendedMasterSecret)
extensions.AddUint16(0)
}
if m.srtpProtectionProfile != 0 {
extensions.AddUint16(extensionUseSRTP)
extensions.AddUint16LengthPrefixed(func(extension *cryptobyte.Builder) {
extension.AddUint16LengthPrefixed(func(srtpProtectionProfiles *cryptobyte.Builder) {
srtpProtectionProfiles.AddUint16(m.srtpProtectionProfile)
})
addUint8LengthPrefixedBytes(extension, []byte(m.srtpMasterKeyIdentifier))
})
}
if m.sctList != nil {
extensions.AddUint16(extensionSignedCertificateTimestamp)
addUint16LengthPrefixedBytes(extensions, m.sctList)
}
if l := len(m.customExtension); l > 0 {
extensions.AddUint16(extensionCustom)
addUint16LengthPrefixedBytes(extensions, []byte(m.customExtension))
}
if m.nextProtoNeg && m.npnAfterAlpn {
extensions.AddUint16(extensionNextProtoNeg)
extensions.AddUint16LengthPrefixed(func(extension *cryptobyte.Builder) {
for _, v := range m.nextProtos {
addUint8LengthPrefixedBytes(extension, []byte(v))
}
})
}
if m.hasKeyShare {
extensions.AddUint16(extensionKeyShare)
extensions.AddUint16LengthPrefixed(func(keyShare *cryptobyte.Builder) {
keyShare.AddUint16(uint16(m.keyShare.group))
addUint16LengthPrefixedBytes(keyShare, m.keyShare.keyExchange)
})
}
if m.supportedVersion != 0 {
extensions.AddUint16(extensionSupportedVersions)
extensions.AddUint16(2) // Length
extensions.AddUint16(m.supportedVersion)
}
if len(m.supportedPoints) > 0 {
// http://tools.ietf.org/html/rfc4492#section-5.1.2
extensions.AddUint16(extensionSupportedPoints)
extensions.AddUint16LengthPrefixed(func(supportedPointsList *cryptobyte.Builder) {
addUint8LengthPrefixedBytes(supportedPointsList, m.supportedPoints)
})
}
if len(m.supportedCurves) > 0 {
// https://tools.ietf.org/html/rfc8446#section-4.2.7
extensions.AddUint16(extensionSupportedCurves)
extensions.AddUint16LengthPrefixed(func(supportedCurvesList *cryptobyte.Builder) {
supportedCurvesList.AddUint16LengthPrefixed(func(supportedCurves *cryptobyte.Builder) {
for _, curve := range m.supportedCurves {
supportedCurves.AddUint16(uint16(curve))
}
})
})
}
if len(m.quicTransportParams) > 0 {
extensions.AddUint16(extensionQUICTransportParams)
addUint16LengthPrefixedBytes(extensions, m.quicTransportParams)
}
if len(m.quicTransportParamsLegacy) > 0 {
extensions.AddUint16(extensionQUICTransportParamsLegacy)
addUint16LengthPrefixedBytes(extensions, m.quicTransportParamsLegacy)
}
if m.hasEarlyData {
extensions.AddUint16(extensionEarlyData)
extensions.AddBytes([]byte{0, 0})
}
if m.serverNameAck {
extensions.AddUint16(extensionServerName)
extensions.AddUint16(0) // zero length
}
if m.hasApplicationSettings {
extensions.AddUint16(extensionApplicationSettings)
addUint16LengthPrefixedBytes(extensions, m.applicationSettings)
}
if m.hasApplicationSettingsOld {
extensions.AddUint16(extensionApplicationSettingsOld)
addUint16LengthPrefixedBytes(extensions, m.applicationSettingsOld)
}
if len(m.echRetryConfigs) > 0 {
extensions.AddUint16(extensionEncryptedClientHello)
addUint16LengthPrefixedBytes(extensions, m.echRetryConfigs)
}
}
func (m *serverExtensions) unmarshal(data cryptobyte.String, version uint16) bool {
// Reset all fields.
*m = serverExtensions{}
if !checkDuplicateExtensions(data) {
return false
}
for len(data) > 0 {
var extension uint16
var body cryptobyte.String
if !data.ReadUint16(&extension) ||
!data.ReadUint16LengthPrefixed(&body) {
return false
}
switch extension {
case extensionNextProtoNeg:
m.nextProtoNeg = true
for len(body) > 0 {
var protocol []byte
if !readUint8LengthPrefixedBytes(&body, &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 !readUint8LengthPrefixedBytes(&body, &m.secureRenegotiation) || len(body) != 0 {
return false
}
case extensionALPN:
var protocols, protocol cryptobyte.String
if !body.ReadUint16LengthPrefixed(&protocols) ||
len(body) != 0 ||
!protocols.ReadUint8LengthPrefixed(&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 extensionExtendedMasterSecret:
if len(body) != 0 {
return false
}
m.extendedMasterSecret = true
case extensionUseSRTP:
var profiles, mki cryptobyte.String
if !body.ReadUint16LengthPrefixed(&profiles) ||
!profiles.ReadUint16(&m.srtpProtectionProfile) ||
len(profiles) != 0 ||
!body.ReadUint8LengthPrefixed(&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 !readUint8LengthPrefixedBytes(&body, &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 extensionQUICTransportParamsLegacy:
m.quicTransportParamsLegacy = body
case extensionEarlyData:
if version < VersionTLS13 || len(body) != 0 {
return false
}
m.hasEarlyData = true
case extensionApplicationSettings:
m.hasApplicationSettings = true
m.applicationSettings = body
case extensionApplicationSettingsOld:
m.hasApplicationSettingsOld = true
m.applicationSettingsOld = body
case extensionEncryptedClientHello:
if version < VersionTLS13 {
return false
}
m.echRetryConfigs = body
// Validate the ECHConfig with a top-level parse.
var echConfigs cryptobyte.String
if !body.ReadUint16LengthPrefixed(&echConfigs) {
return false
}
for len(echConfigs) > 0 {
var version uint16
var contents cryptobyte.String
if !echConfigs.ReadUint16(&version) ||
!echConfigs.ReadUint16LengthPrefixed(&contents) {
return false
}
}
if len(body) > 0 {
return false
}
default:
// Unknown extensions are illegal from the server.
return false
}
}
return true
}
type clientEncryptedExtensionsMsg struct {
raw []byte
applicationSettings []byte
hasApplicationSettings bool
applicationSettingsOld []byte
hasApplicationSettingsOld bool
customExtension []byte
}
func (m *clientEncryptedExtensionsMsg) marshal() (x []byte) {
if m.raw != nil {
return m.raw
}
builder := cryptobyte.NewBuilder(nil)
builder.AddUint8(typeEncryptedExtensions)
builder.AddUint24LengthPrefixed(func(body *cryptobyte.Builder) {
body.AddUint16LengthPrefixed(func(extensions *cryptobyte.Builder) {
if m.hasApplicationSettings {
extensions.AddUint16(extensionApplicationSettings)
addUint16LengthPrefixedBytes(extensions, m.applicationSettings)
}
if m.hasApplicationSettingsOld {
extensions.AddUint16(extensionApplicationSettingsOld)
addUint16LengthPrefixedBytes(extensions, m.applicationSettingsOld)
}
if len(m.customExtension) > 0 {
extensions.AddUint16(extensionCustom)
addUint16LengthPrefixedBytes(extensions, m.customExtension)
}
})
})
m.raw = builder.BytesOrPanic()
return m.raw
}
func (m *clientEncryptedExtensionsMsg) unmarshal(data []byte) bool {
m.raw = data
reader := cryptobyte.String(data[4:])
var extensions cryptobyte.String
if !reader.ReadUint16LengthPrefixed(&extensions) ||
len(reader) != 0 {
return false
}
if !checkDuplicateExtensions(extensions) {
return false
}
for len(extensions) > 0 {
var extension uint16
var body cryptobyte.String
if !extensions.ReadUint16(&extension) ||
!extensions.ReadUint16LengthPrefixed(&body) {
return false
}
switch extension {
case extensionApplicationSettings:
m.hasApplicationSettings = true
m.applicationSettings = body
case extensionApplicationSettingsOld:
m.hasApplicationSettingsOld = true
m.applicationSettingsOld = body
default:
// Unknown extensions are illegal in EncryptedExtensions.
return false
}
}
return true
}
type helloRetryRequestMsg struct {
raw []byte
vers uint16
sessionID []byte
cipherSuite uint16
compressionMethod uint8
hasSelectedGroup bool
selectedGroup CurveID
cookie []byte
customExtension string
echConfirmation []byte
echConfirmationOffset int
duplicateExtensions bool
}
func (m *helloRetryRequestMsg) marshal() []byte {
if m.raw != nil {
return m.raw
}
retryRequestMsg := cryptobyte.NewBuilder(nil)
retryRequestMsg.AddUint8(typeServerHello)
retryRequestMsg.AddUint24LengthPrefixed(func(retryRequest *cryptobyte.Builder) {
retryRequest.AddUint16(VersionTLS12)
retryRequest.AddBytes(tls13HelloRetryRequest)
addUint8LengthPrefixedBytes(retryRequest, m.sessionID)
retryRequest.AddUint16(m.cipherSuite)
retryRequest.AddUint8(m.compressionMethod)
retryRequest.AddUint16LengthPrefixed(func(extensions *cryptobyte.Builder) {
count := 1
if m.duplicateExtensions {
count = 2
}
for i := 0; i < count; i++ {
extensions.AddUint16(extensionSupportedVersions)
extensions.AddUint16(2) // Length
extensions.AddUint16(m.vers)
if m.hasSelectedGroup {
extensions.AddUint16(extensionKeyShare)
extensions.AddUint16(2) // length
extensions.AddUint16(uint16(m.selectedGroup))
}
// m.cookie may be a non-nil empty slice for empty cookie tests.
if m.cookie != nil {
extensions.AddUint16(extensionCookie)
extensions.AddUint16LengthPrefixed(func(body *cryptobyte.Builder) {
addUint16LengthPrefixedBytes(body, m.cookie)
})
}
if len(m.customExtension) > 0 {
extensions.AddUint16(extensionCustom)
addUint16LengthPrefixedBytes(extensions, []byte(m.customExtension))
}
if len(m.echConfirmation) > 0 {
extensions.AddUint16(extensionEncryptedClientHello)
addUint16LengthPrefixedBytes(extensions, m.echConfirmation)
}
}
})
})
m.raw = retryRequestMsg.BytesOrPanic()
return m.raw
}
func (m *helloRetryRequestMsg) unmarshal(data []byte) bool {
m.raw = data
reader := cryptobyte.String(data[4:])
var legacyVers uint16
var random []byte
var compressionMethod byte
var extensions cryptobyte.String
if !reader.ReadUint16(&legacyVers) ||
legacyVers != VersionTLS12 ||
!reader.ReadBytes(&random, 32) ||
!readUint8LengthPrefixedBytes(&reader, &m.sessionID) ||
!reader.ReadUint16(&m.cipherSuite) ||
!reader.ReadUint8(&compressionMethod) ||
compressionMethod != 0 ||
!reader.ReadUint16LengthPrefixed(&extensions) ||
len(reader) != 0 {
return false
}
for len(extensions) > 0 {
var extension uint16
var body cryptobyte.String
if !extensions.ReadUint16(&extension) ||
!extensions.ReadUint16LengthPrefixed(&body) {
return false
}
switch extension {
case extensionSupportedVersions:
if !body.ReadUint16(&m.vers) ||
len(body) != 0 {
return false
}
case extensionKeyShare:
var v uint16
if !body.ReadUint16(&v) || len(body) != 0 {
return false
}
m.hasSelectedGroup = true
m.selectedGroup = CurveID(v)
case extensionCookie:
if !readUint16LengthPrefixedBytes(&body, &m.cookie) ||
len(m.cookie) == 0 ||
len(body) != 0 {
return false
}
case extensionEncryptedClientHello:
if len(body) != echAcceptConfirmationLength {
return false
}
m.echConfirmation = body
m.echConfirmationOffset = len(m.raw) - len(extensions) - len(body)
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
delegatedCredential *delegatedCredential
}
type delegatedCredential struct {
// https://www.rfc-editor.org/rfc/rfc9345.html#section-4
raw []byte
signedBytes []byte
lifetimeSecs uint32
dcCertVerifyAlgo signatureAlgorithm
pkixPublicKey []byte
algorithm signatureAlgorithm
signature []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 := cryptobyte.NewBuilder(nil)
certMsg.AddUint8(typeCertificate)
certMsg.AddUint24LengthPrefixed(func(certificate *cryptobyte.Builder) {
if m.hasRequestContext {
addUint8LengthPrefixedBytes(certificate, m.requestContext)
}
certificate.AddUint24LengthPrefixed(func(certificateList *cryptobyte.Builder) {
for _, cert := range m.certificates {
addUint24LengthPrefixedBytes(certificateList, cert.data)
if m.hasRequestContext {
certificateList.AddUint16LengthPrefixed(func(extensions *cryptobyte.Builder) {
count := 1
if cert.duplicateExtensions {
count = 2
}
for i := 0; i < count; i++ {
if cert.ocspResponse != nil {
extensions.AddUint16(extensionStatusRequest)
extensions.AddUint16LengthPrefixed(func(body *cryptobyte.Builder) {
body.AddUint8(statusTypeOCSP)
addUint24LengthPrefixedBytes(body, cert.ocspResponse)
})
}
if cert.sctList != nil {
extensions.AddUint16(extensionSignedCertificateTimestamp)
addUint16LengthPrefixedBytes(extensions, cert.sctList)
}
}
if cert.extraExtension != nil {
extensions.AddBytes(cert.extraExtension)
}
})
}
}
})
})
m.raw = certMsg.BytesOrPanic()
return m.raw
}
func (m *certificateMsg) unmarshal(data []byte) bool {
m.raw = data
reader := cryptobyte.String(data[4:])
if m.hasRequestContext && !readUint8LengthPrefixedBytes(&reader, &m.requestContext) {
return false
}
var certs cryptobyte.String
if !reader.ReadUint24LengthPrefixed(&certs) || len(reader) != 0 {
return false
}
m.certificates = nil
for len(certs) > 0 {
var cert certificateEntry
if !readUint24LengthPrefixedBytes(&certs, &cert.data) {
return false
}
if m.hasRequestContext {
var extensions cryptobyte.String
if !certs.ReadUint16LengthPrefixed(&extensions) || !checkDuplicateExtensions(extensions) {
return false
}
for len(extensions) > 0 {
var extension uint16
var body cryptobyte.String
if !extensions.ReadUint16(&extension) ||
!extensions.ReadUint16LengthPrefixed(&body) {
return false
}
switch extension {
case extensionStatusRequest:
var statusType byte
if !body.ReadUint8(&statusType) ||
statusType != statusTypeOCSP ||
!readUint24LengthPrefixedBytes(&body, &cert.ocspResponse) ||
len(body) != 0 {
return false
}
case extensionSignedCertificateTimestamp:
cert.sctList = []byte(body)
case extensionDelegatedCredential:
// https://www.rfc-editor.org/rfc/rfc9345.html#section-4
if cert.delegatedCredential != nil {
return false
}
dc := new(delegatedCredential)
origBody := body
var dcCertVerifyAlgo, algorithm uint16
if !body.ReadUint32(&dc.lifetimeSecs) ||
!body.ReadUint16(&dcCertVerifyAlgo) ||
!readUint24LengthPrefixedBytes(&body, &dc.pkixPublicKey) ||
!body.ReadUint16(&algorithm) ||
!readUint16LengthPrefixedBytes(&body, &dc.signature) ||
len(body) != 0 {
return false
}
dc.dcCertVerifyAlgo = signatureAlgorithm(dcCertVerifyAlgo)
dc.algorithm = signatureAlgorithm(algorithm)
dc.raw = origBody
dc.signedBytes = []byte(origBody)[:4+2+3+len(dc.pkixPublicKey)]
cert.delegatedCredential = dc
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 := cryptobyte.NewBuilder(nil)
certMsg.AddUint8(typeCompressedCertificate)
certMsg.AddUint24LengthPrefixed(func(certificate *cryptobyte.Builder) {
certificate.AddUint16(m.algID)
certificate.AddUint24(m.uncompressedLength)
addUint24LengthPrefixedBytes(certificate, m.compressed)
})
m.raw = certMsg.BytesOrPanic()
return m.raw
}
func (m *compressedCertificateMsg) unmarshal(data []byte) bool {
m.raw = data
reader := cryptobyte.String(data[4:])
if !reader.ReadUint16(&m.algID) ||
!reader.ReadUint24(&m.uncompressedLength) ||
!readUint24LengthPrefixedBytes(&reader, &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 := cryptobyte.NewBuilder(nil)
msg.AddUint8(typeServerKeyExchange)
addUint24LengthPrefixedBytes(msg, m.key)
m.raw = msg.BytesOrPanic()
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 := cryptobyte.NewBuilder(nil)
msg.AddUint8(typeCertificateStatus)
msg.AddUint24LengthPrefixed(func(body *cryptobyte.Builder) {
body.AddUint8(statusTypeOCSP)
addUint24LengthPrefixedBytes(body, m.response)
})
x = msg.BytesOrPanic()
} 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 := cryptobyte.String(data[4:])
if !reader.ReadUint8(&m.statusType) ||
m.statusType != statusTypeOCSP ||
!readUint24LengthPrefixedBytes(&reader, &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 := cryptobyte.NewBuilder(nil)
msg.AddUint8(typeClientKeyExchange)
addUint24LengthPrefixedBytes(msg, m.ciphertext)
m.raw = msg.BytesOrPanic()
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 := cryptobyte.NewBuilder(nil)
msg.AddUint8(typeFinished)
addUint24LengthPrefixedBytes(msg, m.verifyData)
m.raw = msg.BytesOrPanic()
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 := cryptobyte.NewBuilder(nil)
msg.AddUint8(typeNextProtocol)
msg.AddUint24LengthPrefixed(func(body *cryptobyte.Builder) {
addUint8LengthPrefixedBytes(body, []byte(m.proto))
addUint8LengthPrefixedBytes(body, make([]byte, padding))
})
m.raw = msg.BytesOrPanic()
return m.raw
}
func (m *nextProtoMsg) unmarshal(data []byte) bool {
m.raw = data
reader := cryptobyte.String(data[4:])
var proto, padding []byte
if !readUint8LengthPrefixedBytes(&reader, &proto) ||
!readUint8LengthPrefixedBytes(&reader, &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 := cryptobyte.NewBuilder(nil)
builder.AddUint8(typeCertificateRequest)
builder.AddUint24LengthPrefixed(func(body *cryptobyte.Builder) {
if m.hasRequestContext {
addUint8LengthPrefixedBytes(body, m.requestContext)
body.AddUint16LengthPrefixed(func(extensions *cryptobyte.Builder) {
if m.hasSignatureAlgorithm {
extensions.AddUint16(extensionSignatureAlgorithms)
extensions.AddUint16LengthPrefixed(func(extension *cryptobyte.Builder) {
extension.AddUint16LengthPrefixed(func(signatureAlgorithms *cryptobyte.Builder) {
for _, sigAlg := range m.signatureAlgorithms {
signatureAlgorithms.AddUint16(uint16(sigAlg))
}
})
})
}
if len(m.signatureAlgorithmsCert) > 0 {
extensions.AddUint16(extensionSignatureAlgorithmsCert)
extensions.AddUint16LengthPrefixed(func(extension *cryptobyte.Builder) {
extension.AddUint16LengthPrefixed(func(signatureAlgorithmsCert *cryptobyte.Builder) {
for _, sigAlg := range m.signatureAlgorithmsCert {
signatureAlgorithmsCert.AddUint16(uint16(sigAlg))
}
})
})
}
if len(m.certificateAuthorities) > 0 {
extensions.AddUint16(extensionCertificateAuthorities)
extensions.AddUint16LengthPrefixed(func(extension *cryptobyte.Builder) {
extension.AddUint16LengthPrefixed(func(certificateAuthorities *cryptobyte.Builder) {
for _, ca := range m.certificateAuthorities {
addUint16LengthPrefixedBytes(certificateAuthorities, ca)
}
})
})
}
if m.customExtension > 0 {
extensions.AddUint16(m.customExtension)
extensions.AddUint16(0) // Empty extension
}
})
} else {
addUint8LengthPrefixedBytes(body, m.certificateTypes)
if m.hasSignatureAlgorithm {
body.AddUint16LengthPrefixed(func(signatureAlgorithms *cryptobyte.Builder) {
for _, sigAlg := range m.signatureAlgorithms {
signatureAlgorithms.AddUint16(uint16(sigAlg))
}
})
}
body.AddUint16LengthPrefixed(func(certificateAuthorities *cryptobyte.Builder) {
for _, ca := range m.certificateAuthorities {
addUint16LengthPrefixedBytes(certificateAuthorities, ca)
}
})
}
})
m.raw = builder.BytesOrPanic()
return m.raw
}
func parseCAs(reader *cryptobyte.String, out *[][]byte) bool {
var cas cryptobyte.String
if !reader.ReadUint16LengthPrefixed(&cas) {
return false
}
for len(cas) > 0 {
var ca []byte
if !readUint16LengthPrefixedBytes(&cas, &ca) {
return false
}
*out = append(*out, ca)
}
return true
}
func (m *certificateRequestMsg) unmarshal(data []byte) bool {
m.raw = data
reader := cryptobyte.String(data[4:])
if m.hasRequestContext {
var extensions cryptobyte.String
if !readUint8LengthPrefixedBytes(&reader, &m.requestContext) ||
!reader.ReadUint16LengthPrefixed(&extensions) ||
len(reader) != 0 ||
!checkDuplicateExtensions(extensions) {
return false
}
for len(extensions) > 0 {
var extension uint16
var body cryptobyte.String
if !extensions.ReadUint16(&extension) ||
!extensions.ReadUint16LengthPrefixed(&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 !readUint8LengthPrefixedBytes(&reader, &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() []byte {
if m.raw != nil {
return m.raw
}
// See http://tools.ietf.org/html/rfc4346#section-7.4.8
msg := cryptobyte.NewBuilder(nil)
msg.AddUint8(typeCertificateVerify)
msg.AddUint24LengthPrefixed(func(body *cryptobyte.Builder) {
if m.hasSignatureAlgorithm {
body.AddUint16(uint16(m.signatureAlgorithm))
}
addUint16LengthPrefixedBytes(body, m.signature)
})
m.raw = msg.BytesOrPanic()
return m.raw
}
func (m *certificateVerifyMsg) unmarshal(data []byte) bool {
m.raw = data
reader := cryptobyte.String(data[4:])
if m.hasSignatureAlgorithm {
var v uint16
if !reader.ReadUint16(&v) {
return false
}
m.signatureAlgorithm = signatureAlgorithm(v)
}
if !readUint16LengthPrefixedBytes(&reader, &m.signature) ||
!reader.Empty() {
return false
}
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 := cryptobyte.NewBuilder(nil)
ticketMsg.AddUint8(typeNewSessionTicket)
ticketMsg.AddUint24LengthPrefixed(func(body *cryptobyte.Builder) {
body.AddUint32(m.ticketLifetime)
if version >= VersionTLS13 {
body.AddUint32(m.ticketAgeAdd)
addUint8LengthPrefixedBytes(body, m.ticketNonce)
}
addUint16LengthPrefixedBytes(body, m.ticket)
if version >= VersionTLS13 {
body.AddUint16LengthPrefixed(func(extensions *cryptobyte.Builder) {
if m.maxEarlyDataSize > 0 {
extensions.AddUint16(extensionEarlyData)
extensions.AddUint16LengthPrefixed(func(child *cryptobyte.Builder) {
child.AddUint32(m.maxEarlyDataSize)
})
if m.duplicateEarlyDataExtension {
extensions.AddUint16(extensionEarlyData)
extensions.AddUint16LengthPrefixed(func(child *cryptobyte.Builder) {
child.AddUint32(m.maxEarlyDataSize)
})
}
}
if len(m.customExtension) > 0 {
extensions.AddUint16(extensionCustom)
addUint16LengthPrefixedBytes(extensions, []byte(m.customExtension))
}
})
}
})
m.raw = ticketMsg.BytesOrPanic()
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")
}
reader := cryptobyte.String(data[4:])
if !reader.ReadUint32(&m.ticketLifetime) {
return false
}
if version >= VersionTLS13 {
if !reader.ReadUint32(&m.ticketAgeAdd) ||
!readUint8LengthPrefixedBytes(&reader, &m.ticketNonce) {
return false
}
}
if !readUint16LengthPrefixedBytes(&reader, &m.ticket) ||
(version >= VersionTLS13 && len(m.ticket) == 0) {
return false
}
if version >= VersionTLS13 {
var extensions cryptobyte.String
if !reader.ReadUint16LengthPrefixed(&extensions) || !reader.Empty() {
return false
}
for !extensions.Empty() {
var extension uint16
var body cryptobyte.String
if !extensions.ReadUint16(&extension) ||
!extensions.ReadUint16LengthPrefixed(&body) {
return false
}
switch extension {
case extensionEarlyData:
if !body.ReadUint32(&m.maxEarlyDataSize) || !body.Empty() {
return false
}
default:
if isGREASEValue(extension) {
m.hasGREASEExtension = true
}
}
}
}
return reader.Empty()
}
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
}