libgo/go/crypto/tls/handshake_messages_test.go

   1 // Copyright 2009 The Go Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style
   3 // license that can be found in the LICENSE file.
   4
   5 package tls
   6
   7 import (
   8         "math/rand"
   9         "reflect"
  10         "testing"
  11         "testing/quick"
  12 )
  13
  14 var tests = []interface{}{
  15         &clientHelloMsg{},
  16         &serverHelloMsg{},
  17         &finishedMsg{},
  18
  19         &certificateMsg{},
  20         &certificateRequestMsg{},
  21         &certificateVerifyMsg{},
  22         &certificateStatusMsg{},
  23         &clientKeyExchangeMsg{},
  24         &nextProtoMsg{},
  25         &newSessionTicketMsg{},
  26         &sessionState{},
  27 }
  28
  29 type testMessage interface {
  30         marshal() []byte
  31         unmarshal([]byte) bool
  32         equal(interface{}) bool
  33 }
  34
  35 func TestMarshalUnmarshal(t *testing.T) {
  36         rand := rand.New(rand.NewSource(0))
  37
  38         for i, iface := range tests {
  39                 ty := reflect.ValueOf(iface).Type()
  40
  41                 n := 100
  42                 if testing.Short() {
  43                         n = 5
  44                 }
  45                 for j := 0; j < n; j++ {
  46                         v, ok := quick.Value(ty, rand)
  47                         if !ok {
  48                                 t.Errorf("#%d: failed to create value", i)
  49                                 break
  50                         }
  51
  52                         m1 := v.Interface().(testMessage)
  53                         marshaled := m1.marshal()
  54                         m2 := iface.(testMessage)
  55                         if !m2.unmarshal(marshaled) {
  56                                 t.Errorf("#%d failed to unmarshal %#v %x", i, m1, marshaled)
  57                                 break
  58                         }
  59                         m2.marshal() // to fill any marshal cache in the message
  60
  61                         if !m1.equal(m2) {
  62                                 t.Errorf("#%d got:%#v want:%#v %x", i, m2, m1, marshaled)
  63                                 break
  64                         }
  65
  66                         if i >= 3 {
  67                                 // The first three message types (ClientHello,
  68                                 // ServerHello and Finished) are allowed to
  69                                 // have parsable prefixes because the extension
  70                                 // data is optional and the length of the
  71                                 // Finished varies across versions.
  72                                 for j := 0; j < len(marshaled); j++ {
  73                                         if m2.unmarshal(marshaled[0:j]) {
  74                                                 t.Errorf("#%d unmarshaled a prefix of length %d of %#v", i, j, m1)
  75                                                 break
  76                                         }
  77                                 }
  78                         }
  79                 }
  80         }
  81 }
  82
  83 func TestFuzz(t *testing.T) {
  84         rand := rand.New(rand.NewSource(0))
  85         for _, iface := range tests {
  86                 m := iface.(testMessage)
  87
  88                 for j := 0; j < 1000; j++ {
  89                         len := rand.Intn(100)
  90                         bytes := randomBytes(len, rand)
  91                         // This just looks for crashes due to bounds errors etc.
  92                         m.unmarshal(bytes)
  93                 }
  94         }
  95 }
  96
  97 func randomBytes(n int, rand *rand.Rand) []byte {
  98         r := make([]byte, n)
  99         for i := 0; i < n; i++ {
 100                 r[i] = byte(rand.Int31())
 101         }
 102         return r
 103 }
 104
 105 func randomString(n int, rand *rand.Rand) string {
 106         b := randomBytes(n, rand)
 107         return string(b)
 108 }
 109
 110 func (*clientHelloMsg) Generate(rand *rand.Rand, size int) reflect.Value {
 111         m := &clientHelloMsg{}
 112         m.vers = uint16(rand.Intn(65536))
 113         m.random = randomBytes(32, rand)
 114         m.sessionId = randomBytes(rand.Intn(32), rand)
 115         m.cipherSuites = make([]uint16, rand.Intn(63)+1)
 116         for i := 0; i < len(m.cipherSuites); i++ {
 117                 m.cipherSuites[i] = uint16(rand.Int31())
 118         }
 119         m.compressionMethods = randomBytes(rand.Intn(63)+1, rand)
 120         if rand.Intn(10) > 5 {
 121                 m.nextProtoNeg = true
 122         }
 123         if rand.Intn(10) > 5 {
 124                 m.serverName = randomString(rand.Intn(255), rand)
 125         }
 126         m.ocspStapling = rand.Intn(10) > 5
 127         m.supportedPoints = randomBytes(rand.Intn(5)+1, rand)
 128         m.supportedCurves = make([]CurveID, rand.Intn(5)+1)
 129         for i := range m.supportedCurves {
 130                 m.supportedCurves[i] = CurveID(rand.Intn(30000))
 131         }
 132         if rand.Intn(10) > 5 {
 133                 m.ticketSupported = true
 134                 if rand.Intn(10) > 5 {
 135                         m.sessionTicket = randomBytes(rand.Intn(300), rand)
 136                 }
 137         }
 138         if rand.Intn(10) > 5 {
 139                 m.signatureAndHashes = supportedSKXSignatureAlgorithms
 140         }
 141
 142         return reflect.ValueOf(m)
 143 }
 144
 145 func (*serverHelloMsg) Generate(rand *rand.Rand, size int) reflect.Value {
 146         m := &serverHelloMsg{}
 147         m.vers = uint16(rand.Intn(65536))
 148         m.random = randomBytes(32, rand)
 149         m.sessionId = randomBytes(rand.Intn(32), rand)
 150         m.cipherSuite = uint16(rand.Int31())
 151         m.compressionMethod = uint8(rand.Intn(256))
 152
 153         if rand.Intn(10) > 5 {
 154                 m.nextProtoNeg = true
 155
 156                 n := rand.Intn(10)
 157                 m.nextProtos = make([]string, n)
 158                 for i := 0; i < n; i++ {
 159                         m.nextProtos[i] = randomString(20, rand)
 160                 }
 161         }
 162
 163         if rand.Intn(10) > 5 {
 164                 m.ocspStapling = true
 165         }
 166         if rand.Intn(10) > 5 {
 167                 m.ticketSupported = true
 168         }
 169
 170         return reflect.ValueOf(m)
 171 }
 172
 173 func (*certificateMsg) Generate(rand *rand.Rand, size int) reflect.Value {
 174         m := &certificateMsg{}
 175         numCerts := rand.Intn(20)
 176         m.certificates = make([][]byte, numCerts)
 177         for i := 0; i < numCerts; i++ {
 178                 m.certificates[i] = randomBytes(rand.Intn(10)+1, rand)
 179         }
 180         return reflect.ValueOf(m)
 181 }
 182
 183 func (*certificateRequestMsg) Generate(rand *rand.Rand, size int) reflect.Value {
 184         m := &certificateRequestMsg{}
 185         m.certificateTypes = randomBytes(rand.Intn(5)+1, rand)
 186         numCAs := rand.Intn(100)
 187         m.certificateAuthorities = make([][]byte, numCAs)
 188         for i := 0; i < numCAs; i++ {
 189                 m.certificateAuthorities[i] = randomBytes(rand.Intn(15)+1, rand)
 190         }
 191         return reflect.ValueOf(m)
 192 }
 193
 194 func (*certificateVerifyMsg) Generate(rand *rand.Rand, size int) reflect.Value {
 195         m := &certificateVerifyMsg{}
 196         m.signature = randomBytes(rand.Intn(15)+1, rand)
 197         return reflect.ValueOf(m)
 198 }
 199
 200 func (*certificateStatusMsg) Generate(rand *rand.Rand, size int) reflect.Value {
 201         m := &certificateStatusMsg{}
 202         if rand.Intn(10) > 5 {
 203                 m.statusType = statusTypeOCSP
 204                 m.response = randomBytes(rand.Intn(10)+1, rand)
 205         } else {
 206                 m.statusType = 42
 207         }
 208         return reflect.ValueOf(m)
 209 }
 210
 211 func (*clientKeyExchangeMsg) Generate(rand *rand.Rand, size int) reflect.Value {
 212         m := &clientKeyExchangeMsg{}
 213         m.ciphertext = randomBytes(rand.Intn(1000)+1, rand)
 214         return reflect.ValueOf(m)
 215 }
 216
 217 func (*finishedMsg) Generate(rand *rand.Rand, size int) reflect.Value {
 218         m := &finishedMsg{}
 219         m.verifyData = randomBytes(12, rand)
 220         return reflect.ValueOf(m)
 221 }
 222
 223 func (*nextProtoMsg) Generate(rand *rand.Rand, size int) reflect.Value {
 224         m := &nextProtoMsg{}
 225         m.proto = randomString(rand.Intn(255), rand)
 226         return reflect.ValueOf(m)
 227 }
 228
 229 func (*newSessionTicketMsg) Generate(rand *rand.Rand, size int) reflect.Value {
 230         m := &newSessionTicketMsg{}
 231         m.ticket = randomBytes(rand.Intn(4), rand)
 232         return reflect.ValueOf(m)
 233 }
 234
 235 func (*sessionState) Generate(rand *rand.Rand, size int) reflect.Value {
 236         s := &sessionState{}
 237         s.vers = uint16(rand.Intn(10000))
 238         s.cipherSuite = uint16(rand.Intn(10000))
 239         s.masterSecret = randomBytes(rand.Intn(100), rand)
 240         numCerts := rand.Intn(20)
 241         s.certificates = make([][]byte, numCerts)
 242         for i := 0; i < numCerts; i++ {
 243                 s.certificates[i] = randomBytes(rand.Intn(10)+1, rand)
 244         }
 245         return reflect.ValueOf(s)
 246 }