ipc/ipc_fuzzing_tests.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include <stdio.h>
   6 #include <string>
   7 #include <sstream>
   8
   9 #include "base/message_loop/message_loop.h"
  10 #include "base/strings/string16.h"
  11 #include "base/strings/utf_string_conversions.h"
  12 #include "base/threading/platform_thread.h"
  13 #include "ipc/ipc_test_base.h"
  14 #include "testing/gtest/include/gtest/gtest.h"
  15
  16 // IPC messages for testing ----------------------------------------------------
  17
  18 #define IPC_MESSAGE_IMPL
  19 #include "ipc/ipc_message_macros.h"
  20
  21 #define IPC_MESSAGE_START TestMsgStart
  22
  23 // Generic message class that is an int followed by a string16.
  24 IPC_MESSAGE_CONTROL2(MsgClassIS, int, base::string16)
  25
  26 // Generic message class that is a string16 followed by an int.
  27 IPC_MESSAGE_CONTROL2(MsgClassSI, base::string16, int)
  28
  29 // Message to create a mutex in the IPC server, using the received name.
  30 IPC_MESSAGE_CONTROL2(MsgDoMutex, base::string16, int)
  31
  32 // Used to generate an ID for a message that should not exist.
  33 IPC_MESSAGE_CONTROL0(MsgUnhandled)
  34
  35 // -----------------------------------------------------------------------------
  36
  37 namespace {
  38
  39 TEST(IPCMessageIntegrity, ReadBeyondBufferStr) {
  40   // This was BUG 984408.
  41   uint32 v1 = kuint32max - 1;
  42   int v2 = 666;
  43   IPC::Message m(0, 1, IPC::Message::PRIORITY_NORMAL);
  44   EXPECT_TRUE(m.WriteInt(v1));
  45   EXPECT_TRUE(m.WriteInt(v2));
  46
  47   base::PickleIterator iter(m);
  48   std::string vs;
  49   EXPECT_FALSE(iter.ReadString(&vs));
  50 }
  51
  52 TEST(IPCMessageIntegrity, ReadBeyondBufferStr16) {
  53   // This was BUG 984408.
  54   uint32 v1 = kuint32max - 1;
  55   int v2 = 777;
  56   IPC::Message m(0, 1, IPC::Message::PRIORITY_NORMAL);
  57   EXPECT_TRUE(m.WriteInt(v1));
  58   EXPECT_TRUE(m.WriteInt(v2));
  59
  60   base::PickleIterator iter(m);
  61   base::string16 vs;
  62   EXPECT_FALSE(iter.ReadString16(&vs));
  63 }
  64
  65 TEST(IPCMessageIntegrity, ReadBytesBadIterator) {
  66   // This was BUG 1035467.
  67   IPC::Message m(0, 1, IPC::Message::PRIORITY_NORMAL);
  68   EXPECT_TRUE(m.WriteInt(1));
  69   EXPECT_TRUE(m.WriteInt(2));
  70
  71   base::PickleIterator iter(m);
  72   const char* data = NULL;
  73   EXPECT_TRUE(iter.ReadBytes(&data, sizeof(int)));
  74 }
  75
  76 TEST(IPCMessageIntegrity, ReadVectorNegativeSize) {
  77   // A slight variation of BUG 984408. Note that the pickling of vector<char>
  78   // has a specialized template which is not vulnerable to this bug. So here
  79   // try to hit the non-specialized case vector<P>.
  80   IPC::Message m(0, 1, IPC::Message::PRIORITY_NORMAL);
  81   EXPECT_TRUE(m.WriteInt(-1));   // This is the count of elements.
  82   EXPECT_TRUE(m.WriteInt(1));
  83   EXPECT_TRUE(m.WriteInt(2));
  84   EXPECT_TRUE(m.WriteInt(3));
  85
  86   std::vector<double> vec;
  87   base::PickleIterator iter(m);
  88   EXPECT_FALSE(ReadParam(&m, &iter, &vec));
  89 }
  90
  91 TEST(IPCMessageIntegrity, ReadVectorTooLarge1) {
  92   // This was BUG 1006367. This is the large but positive length case. Again
  93   // we try to hit the non-specialized case vector<P>.
  94   IPC::Message m(0, 1, IPC::Message::PRIORITY_NORMAL);
  95   EXPECT_TRUE(m.WriteInt(0x21000003));   // This is the count of elements.
  96   EXPECT_TRUE(m.WriteInt64(1));
  97   EXPECT_TRUE(m.WriteInt64(2));
  98
  99   std::vector<int64> vec;
 100   base::PickleIterator iter(m);
 101   EXPECT_FALSE(ReadParam(&m, &iter, &vec));
 102 }
 103
 104 TEST(IPCMessageIntegrity, ReadVectorTooLarge2) {
 105   // This was BUG 1006367. This is the large but positive with an additional
 106   // integer overflow when computing the actual byte size. Again we try to hit
 107   // the non-specialized case vector<P>.
 108   IPC::Message m(0, 1, IPC::Message::PRIORITY_NORMAL);
 109   EXPECT_TRUE(m.WriteInt(0x71000000));   // This is the count of elements.
 110   EXPECT_TRUE(m.WriteInt64(1));
 111   EXPECT_TRUE(m.WriteInt64(2));
 112
 113   std::vector<int64> vec;
 114   base::PickleIterator iter(m);
 115   EXPECT_FALSE(ReadParam(&m, &iter, &vec));
 116 }
 117
 118 class SimpleListener : public IPC::Listener {
 119  public:
 120   SimpleListener() : other_(NULL) {
 121   }
 122   void Init(IPC::Sender* s) {
 123     other_ = s;
 124   }
 125  protected:
 126   IPC::Sender* other_;
 127 };
 128
 129 enum {
 130   FUZZER_ROUTING_ID = 5
 131 };
 132
 133 // The fuzzer server class. It runs in a child process and expects
 134 // only two IPC calls; after that it exits the message loop which
 135 // terminates the child process.
 136 class FuzzerServerListener : public SimpleListener {
 137  public:
 138   FuzzerServerListener() : message_count_(2), pending_messages_(0) {
 139   }
 140   bool OnMessageReceived(const IPC::Message& msg) override {
 141     if (msg.routing_id() == MSG_ROUTING_CONTROL) {
 142       ++pending_messages_;
 143       IPC_BEGIN_MESSAGE_MAP(FuzzerServerListener, msg)
 144         IPC_MESSAGE_HANDLER(MsgClassIS, OnMsgClassISMessage)
 145         IPC_MESSAGE_HANDLER(MsgClassSI, OnMsgClassSIMessage)
 146       IPC_END_MESSAGE_MAP()
 147       if (pending_messages_) {
 148         // Probably a problem de-serializing the message.
 149         ReplyMsgNotHandled(msg.type());
 150       }
 151     }
 152     return true;
 153   }
 154
 155  private:
 156   void OnMsgClassISMessage(int value, const base::string16& text) {
 157     UseData(MsgClassIS::ID, value, text);
 158     RoundtripAckReply(FUZZER_ROUTING_ID, MsgClassIS::ID, value);
 159     Cleanup();
 160   }
 161
 162   void OnMsgClassSIMessage(const base::string16& text, int value) {
 163     UseData(MsgClassSI::ID, value, text);
 164     RoundtripAckReply(FUZZER_ROUTING_ID, MsgClassSI::ID, value);
 165     Cleanup();
 166   }
 167
 168   bool RoundtripAckReply(int routing, uint32 type_id, int reply) {
 169     IPC::Message* message = new IPC::Message(routing, type_id,
 170                                              IPC::Message::PRIORITY_NORMAL);
 171     message->WriteInt(reply + 1);
 172     message->WriteInt(reply);
 173     return other_->Send(message);
 174   }
 175
 176   void Cleanup() {
 177     --message_count_;
 178     --pending_messages_;
 179     if (0 == message_count_)
 180       base::MessageLoop::current()->Quit();
 181   }
 182
 183   void ReplyMsgNotHandled(uint32 type_id) {
 184     RoundtripAckReply(FUZZER_ROUTING_ID, MsgUnhandled::ID, type_id);
 185     Cleanup();
 186   }
 187
 188   void UseData(int caller, int value, const base::string16& text) {
 189     std::ostringstream os;
 190     os << "IPC fuzzer:" << caller << " [" << value << " "
 191        << base::UTF16ToUTF8(text) << "]\n";
 192     std::string output = os.str();
 193     LOG(WARNING) << output;
 194   }
 195
 196   int message_count_;
 197   int pending_messages_;
 198 };
 199
 200 class FuzzerClientListener : public SimpleListener {
 201  public:
 202   FuzzerClientListener() : last_msg_(NULL) {
 203   }
 204
 205   bool OnMessageReceived(const IPC::Message& msg) override {
 206     last_msg_ = new IPC::Message(msg);
 207     base::MessageLoop::current()->Quit();
 208     return true;
 209   }
 210
 211   bool ExpectMessage(int value, uint32 type_id) {
 212     if (!MsgHandlerInternal(type_id))
 213       return false;
 214     int msg_value1 = 0;
 215     int msg_value2 = 0;
 216     base::PickleIterator iter(*last_msg_);
 217     if (!iter.ReadInt(&msg_value1))
 218       return false;
 219     if (!iter.ReadInt(&msg_value2))
 220       return false;
 221     if ((msg_value2 + 1) != msg_value1)
 222       return false;
 223     if (msg_value2 != value)
 224       return false;
 225
 226     delete last_msg_;
 227     last_msg_ = NULL;
 228     return true;
 229   }
 230
 231   bool ExpectMsgNotHandled(uint32 type_id) {
 232     return ExpectMessage(type_id, MsgUnhandled::ID);
 233   }
 234
 235  private:
 236   bool MsgHandlerInternal(uint32 type_id) {
 237     base::MessageLoop::current()->Run();
 238     if (NULL == last_msg_)
 239       return false;
 240     if (FUZZER_ROUTING_ID != last_msg_->routing_id())
 241       return false;
 242     return (type_id == last_msg_->type());
 243   }
 244
 245   IPC::Message* last_msg_;
 246 };
 247
 248 // Runs the fuzzing server child mode. Returns when the preset number of
 249 // messages have been received.
 250 MULTIPROCESS_IPC_TEST_CLIENT_MAIN(FuzzServerClient) {
 251   base::MessageLoopForIO main_message_loop;
 252   FuzzerServerListener listener;
 253   scoped_ptr<IPC::Channel> channel(IPC::Channel::CreateClient(
 254       IPCTestBase::GetChannelName("FuzzServerClient"),
 255       &listener));
 256   CHECK(channel->Connect());
 257   listener.Init(channel.get());
 258   base::MessageLoop::current()->Run();
 259   return 0;
 260 }
 261
 262 class IPCFuzzingTest : public IPCTestBase {
 263 };
 264
 265 // This test makes sure that the FuzzerClientListener and FuzzerServerListener
 266 // are working properly by generating two well formed IPC calls.
 267 TEST_F(IPCFuzzingTest, SanityTest) {
 268   Init("FuzzServerClient");
 269
 270   FuzzerClientListener listener;
 271   CreateChannel(&listener);
 272   listener.Init(channel());
 273   ASSERT_TRUE(ConnectChannel());
 274   ASSERT_TRUE(StartClient());
 275
 276   IPC::Message* msg = NULL;
 277   int value = 43;
 278   msg = new MsgClassIS(value, base::ASCIIToUTF16("expect 43"));
 279   sender()->Send(msg);
 280   EXPECT_TRUE(listener.ExpectMessage(value, MsgClassIS::ID));
 281
 282   msg = new MsgClassSI(base::ASCIIToUTF16("expect 44"), ++value);
 283   sender()->Send(msg);
 284   EXPECT_TRUE(listener.ExpectMessage(value, MsgClassSI::ID));
 285
 286   EXPECT_TRUE(WaitForClientShutdown());
 287   DestroyChannel();
 288 }
 289
 290 // This test uses a payload that is smaller than expected. This generates an
 291 // error while unpacking the IPC buffer which in debug trigger an assertion and
 292 // in release is ignored (!). Right after we generate another valid IPC to make
 293 // sure framing is working properly.
 294 #if defined(NDEBUG) && !defined(DCHECK_ALWAYS_ON)
 295 TEST_F(IPCFuzzingTest, MsgBadPayloadShort) {
 296   Init("FuzzServerClient");
 297
 298   FuzzerClientListener listener;
 299   CreateChannel(&listener);
 300   listener.Init(channel());
 301   ASSERT_TRUE(ConnectChannel());
 302   ASSERT_TRUE(StartClient());
 303
 304   IPC::Message* msg = new IPC::Message(MSG_ROUTING_CONTROL, MsgClassIS::ID,
 305                                        IPC::Message::PRIORITY_NORMAL);
 306   msg->WriteInt(666);
 307   sender()->Send(msg);
 308   EXPECT_TRUE(listener.ExpectMsgNotHandled(MsgClassIS::ID));
 309
 310   msg = new MsgClassSI(base::ASCIIToUTF16("expect one"), 1);
 311   sender()->Send(msg);
 312   EXPECT_TRUE(listener.ExpectMessage(1, MsgClassSI::ID));
 313
 314   EXPECT_TRUE(WaitForClientShutdown());
 315   DestroyChannel();
 316 }
 317 #endif
 318
 319 // This test uses a payload that has too many arguments, but so the payload size
 320 // is big enough so the unpacking routine does not generate an error as in the
 321 // case of MsgBadPayloadShort test. This test does not pinpoint a flaw (per se)
 322 // as by design we don't carry type information on the IPC message.
 323 TEST_F(IPCFuzzingTest, MsgBadPayloadArgs) {
 324   Init("FuzzServerClient");
 325
 326   FuzzerClientListener listener;
 327   CreateChannel(&listener);
 328   listener.Init(channel());
 329   ASSERT_TRUE(ConnectChannel());
 330   ASSERT_TRUE(StartClient());
 331
 332   IPC::Message* msg = new IPC::Message(MSG_ROUTING_CONTROL, MsgClassSI::ID,
 333                                        IPC::Message::PRIORITY_NORMAL);
 334   msg->WriteString16(base::ASCIIToUTF16("d"));
 335   msg->WriteInt(0);
 336   msg->WriteInt(0x65);  // Extra argument.
 337
 338   sender()->Send(msg);
 339   EXPECT_TRUE(listener.ExpectMessage(0, MsgClassSI::ID));
 340
 341   // Now send a well formed message to make sure the receiver wasn't
 342   // thrown out of sync by the extra argument.
 343   msg = new MsgClassIS(3, base::ASCIIToUTF16("expect three"));
 344   sender()->Send(msg);
 345   EXPECT_TRUE(listener.ExpectMessage(3, MsgClassIS::ID));
 346
 347   EXPECT_TRUE(WaitForClientShutdown());
 348   DestroyChannel();
 349 }
 350
 351 }  // namespace