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      1 // Copyright (c) 2013 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 <ostream>
      6 #include <vector>
      7 
      8 #include "base/basictypes.h"
      9 #include "base/strings/string_number_conversions.h"
     10 #include "crypto/secure_hash.h"
     11 #include "net/quic/crypto/crypto_utils.h"
     12 #include "net/quic/crypto/quic_crypto_server_config.h"
     13 #include "net/quic/crypto/quic_random.h"
     14 #include "net/quic/quic_flags.h"
     15 #include "net/quic/quic_socket_address_coder.h"
     16 #include "net/quic/quic_utils.h"
     17 #include "net/quic/test_tools/crypto_test_utils.h"
     18 #include "net/quic/test_tools/delayed_verify_strike_register_client.h"
     19 #include "net/quic/test_tools/mock_clock.h"
     20 #include "net/quic/test_tools/mock_random.h"
     21 #include "net/quic/test_tools/quic_test_utils.h"
     22 #include "testing/gtest/include/gtest/gtest.h"
     23 
     24 using base::StringPiece;
     25 using std::ostream;
     26 using std::string;
     27 using std::vector;
     28 
     29 namespace net {
     30 namespace test {
     31 
     32 class QuicCryptoServerConfigPeer {
     33  public:
     34   explicit QuicCryptoServerConfigPeer(QuicCryptoServerConfig* server_config)
     35       : server_config_(server_config) {}
     36 
     37   base::Lock* GetStrikeRegisterClientLock() {
     38     return &server_config_->strike_register_client_lock_;
     39   }
     40 
     41  private:
     42   QuicCryptoServerConfig* server_config_;
     43 };
     44 
     45 // Run tests with combinations of
     46 // {FLAGS_use_early_return_when_verifying_chlo,
     47 //  FLAGS_send_quic_crypto_reject_reason}.
     48 struct TestParams {
     49   TestParams(bool use_early_return_when_verifying_chlo,
     50              bool send_quic_crypto_reject_reason)
     51       : use_early_return_when_verifying_chlo(
     52             use_early_return_when_verifying_chlo),
     53         send_quic_crypto_reject_reason(send_quic_crypto_reject_reason) {
     54   }
     55 
     56   friend ostream& operator<<(ostream& os, const TestParams& p) {
     57     os << "{ use_early_return_when_verifying_chlo: "
     58        << p.use_early_return_when_verifying_chlo
     59        << " send_quic_crypto_reject_reason: "
     60        << p.send_quic_crypto_reject_reason << " }";
     61     return os;
     62   }
     63 
     64   bool use_early_return_when_verifying_chlo;
     65   bool send_quic_crypto_reject_reason;
     66 };
     67 
     68 // Constructs various test permutations.
     69 vector<TestParams> GetTestParams() {
     70   vector<TestParams> params;
     71   params.push_back(TestParams(false, false));
     72   params.push_back(TestParams(false, true));
     73   params.push_back(TestParams(true, false));
     74   params.push_back(TestParams(true, true));
     75   return params;
     76 }
     77 
     78 class CryptoServerTest : public ::testing::TestWithParam<TestParams> {
     79  public:
     80   CryptoServerTest()
     81       : rand_(QuicRandom::GetInstance()),
     82         client_address_(Loopback4(), 1234),
     83         config_(QuicCryptoServerConfig::TESTING, rand_) {
     84     config_.SetProofSource(CryptoTestUtils::ProofSourceForTesting());
     85     supported_versions_ = QuicSupportedVersions();
     86     client_version_ = QuicUtils::TagToString(
     87         QuicVersionToQuicTag(supported_versions_.front()));
     88 
     89     FLAGS_use_early_return_when_verifying_chlo =
     90         GetParam().use_early_return_when_verifying_chlo;
     91     FLAGS_send_quic_crypto_reject_reason =
     92         GetParam().send_quic_crypto_reject_reason;
     93   }
     94 
     95   virtual void SetUp() {
     96     scoped_ptr<CryptoHandshakeMessage> msg(
     97         config_.AddDefaultConfig(rand_, &clock_,
     98         config_options_));
     99 
    100     StringPiece orbit;
    101     CHECK(msg->GetStringPiece(kORBT, &orbit));
    102     CHECK_EQ(sizeof(orbit_), orbit.size());
    103     memcpy(orbit_, orbit.data(), orbit.size());
    104 
    105     char public_value[32];
    106     memset(public_value, 42, sizeof(public_value));
    107 
    108     const string nonce_str = GenerateNonce();
    109     nonce_hex_ = "#" + base::HexEncode(nonce_str.data(), nonce_str.size());
    110     pub_hex_ = "#" + base::HexEncode(public_value, sizeof(public_value));
    111 
    112     CryptoHandshakeMessage client_hello = CryptoTestUtils::Message(
    113         "CHLO",
    114         "AEAD", "AESG",
    115         "KEXS", "C255",
    116         "PUBS", pub_hex_.c_str(),
    117         "NONC", nonce_hex_.c_str(),
    118         "VER\0", client_version_.data(),
    119         "$padding", static_cast<int>(kClientHelloMinimumSize),
    120         NULL);
    121     ShouldSucceed(client_hello);
    122     // The message should be rejected because the source-address token is
    123     // missing.
    124     ASSERT_EQ(kREJ, out_.tag());
    125     const HandshakeFailureReason kRejectReasons[] = {
    126       SERVER_CONFIG_INCHOATE_HELLO_FAILURE
    127     };
    128     CheckRejectReasons(kRejectReasons, arraysize(kRejectReasons));
    129 
    130     StringPiece srct;
    131     ASSERT_TRUE(out_.GetStringPiece(kSourceAddressTokenTag, &srct));
    132     srct_hex_ = "#" + base::HexEncode(srct.data(), srct.size());
    133 
    134     StringPiece scfg;
    135     ASSERT_TRUE(out_.GetStringPiece(kSCFG, &scfg));
    136     server_config_.reset(CryptoFramer::ParseMessage(scfg));
    137 
    138     StringPiece scid;
    139     ASSERT_TRUE(server_config_->GetStringPiece(kSCID, &scid));
    140     scid_hex_ = "#" + base::HexEncode(scid.data(), scid.size());
    141   }
    142 
    143   // Helper used to accept the result of ValidateClientHello and pass
    144   // it on to ProcessClientHello.
    145   class ValidateCallback : public ValidateClientHelloResultCallback {
    146    public:
    147     ValidateCallback(CryptoServerTest* test,
    148                      bool should_succeed,
    149                      const char* error_substr,
    150                      bool* called)
    151         : test_(test),
    152           should_succeed_(should_succeed),
    153           error_substr_(error_substr),
    154           called_(called) {
    155       *called_ = false;
    156     }
    157 
    158     virtual void RunImpl(const CryptoHandshakeMessage& client_hello,
    159                          const Result& result) OVERRIDE {
    160       {
    161         // Ensure that the strike register client lock is not held.
    162         QuicCryptoServerConfigPeer peer(&test_->config_);
    163         base::Lock* m = peer.GetStrikeRegisterClientLock();
    164         // In Chromium, we will dead lock if the lock is held by the current
    165         // thread. Chromium doesn't have AssertNotHeld API call.
    166         // m->AssertNotHeld();
    167         base::AutoLock lock(*m);
    168       }
    169       ASSERT_FALSE(*called_);
    170       test_->ProcessValidationResult(
    171           client_hello, result, should_succeed_, error_substr_);
    172       *called_ = true;
    173     }
    174 
    175    private:
    176     CryptoServerTest* test_;
    177     bool should_succeed_;
    178     const char* error_substr_;
    179     bool* called_;
    180   };
    181 
    182   void CheckServerHello(const CryptoHandshakeMessage& server_hello) {
    183     const QuicTag* versions;
    184     size_t num_versions;
    185     server_hello.GetTaglist(kVER, &versions, &num_versions);
    186     ASSERT_EQ(QuicSupportedVersions().size(), num_versions);
    187     for (size_t i = 0; i < num_versions; ++i) {
    188       EXPECT_EQ(QuicVersionToQuicTag(QuicSupportedVersions()[i]), versions[i]);
    189     }
    190 
    191     StringPiece address;
    192     ASSERT_TRUE(server_hello.GetStringPiece(kCADR, &address));
    193     QuicSocketAddressCoder decoder;
    194     ASSERT_TRUE(decoder.Decode(address.data(), address.size()));
    195     EXPECT_EQ(client_address_.address(), decoder.ip());
    196     EXPECT_EQ(client_address_.port(), decoder.port());
    197   }
    198 
    199   void ShouldSucceed(const CryptoHandshakeMessage& message) {
    200     bool called = false;
    201     RunValidate(message, new ValidateCallback(this, true, "", &called));
    202     EXPECT_TRUE(called);
    203   }
    204 
    205   void RunValidate(
    206       const CryptoHandshakeMessage& message,
    207       ValidateClientHelloResultCallback* cb) {
    208     config_.ValidateClientHello(message, client_address_, &clock_, cb);
    209   }
    210 
    211   void ShouldFailMentioning(const char* error_substr,
    212                             const CryptoHandshakeMessage& message) {
    213     bool called = false;
    214     ShouldFailMentioning(error_substr, message, &called);
    215     EXPECT_TRUE(called);
    216   }
    217 
    218   void ShouldFailMentioning(const char* error_substr,
    219                             const CryptoHandshakeMessage& message,
    220                             bool* called) {
    221     config_.ValidateClientHello(
    222         message, client_address_, &clock_,
    223         new ValidateCallback(this, false, error_substr, called));
    224   }
    225 
    226   void ProcessValidationResult(const CryptoHandshakeMessage& message,
    227                                const ValidateCallback::Result& result,
    228                                bool should_succeed,
    229                                const char* error_substr) {
    230     string error_details;
    231     QuicErrorCode error = config_.ProcessClientHello(
    232         result, 1 /* ConnectionId */, client_address_,
    233         supported_versions_.front(), supported_versions_, &clock_, rand_,
    234         &params_, &out_, &error_details);
    235 
    236     if (should_succeed) {
    237       ASSERT_EQ(error, QUIC_NO_ERROR)
    238           << "Message failed with error " << error_details << ": "
    239           << message.DebugString();
    240     } else {
    241       ASSERT_NE(error, QUIC_NO_ERROR)
    242           << "Message didn't fail: " << message.DebugString();
    243 
    244       EXPECT_TRUE(error_details.find(error_substr) != string::npos)
    245           << error_substr << " not in " << error_details;
    246     }
    247   }
    248 
    249   CryptoHandshakeMessage InchoateClientHello(const char* message_tag, ...) {
    250     va_list ap;
    251     va_start(ap, message_tag);
    252 
    253     CryptoHandshakeMessage message =
    254         CryptoTestUtils::BuildMessage(message_tag, ap);
    255     va_end(ap);
    256 
    257     message.SetStringPiece(kPAD, string(kClientHelloMinimumSize, '-'));
    258     return message;
    259   }
    260 
    261   string GenerateNonce() {
    262     string nonce;
    263     CryptoUtils::GenerateNonce(
    264         clock_.WallNow(), rand_,
    265         StringPiece(reinterpret_cast<const char*>(orbit_), sizeof(orbit_)),
    266         &nonce);
    267     return nonce;
    268   }
    269 
    270   void CheckRejectReasons(
    271       const HandshakeFailureReason* expected_handshake_failures,
    272       size_t expected_count) {
    273     const QuicTag* reject_reason_tags;
    274     size_t num_reject_reasons;
    275     QuicErrorCode error_code = out_.GetTaglist(kRREJ, &reject_reason_tags,
    276                                                &num_reject_reasons);
    277     if (!FLAGS_send_quic_crypto_reject_reason) {
    278       ASSERT_EQ(QUIC_CRYPTO_MESSAGE_PARAMETER_NOT_FOUND, error_code);
    279       return;
    280     }
    281     ASSERT_EQ(QUIC_NO_ERROR, error_code);
    282 
    283     if (FLAGS_use_early_return_when_verifying_chlo) {
    284       EXPECT_EQ(1u, num_reject_reasons);
    285     } else {
    286       EXPECT_EQ(expected_count, num_reject_reasons);
    287     }
    288     for (size_t i = 0; i < num_reject_reasons; ++i) {
    289       EXPECT_EQ(expected_handshake_failures[i], reject_reason_tags[i]);
    290     }
    291   }
    292 
    293  protected:
    294   QuicRandom* const rand_;
    295   MockClock clock_;
    296   const IPEndPoint client_address_;
    297   QuicVersionVector supported_versions_;
    298   string client_version_;
    299   QuicCryptoServerConfig config_;
    300   QuicCryptoServerConfig::ConfigOptions config_options_;
    301   QuicCryptoNegotiatedParameters params_;
    302   CryptoHandshakeMessage out_;
    303   uint8 orbit_[kOrbitSize];
    304 
    305   // These strings contain hex escaped values from the server suitable for
    306   // passing to |InchoateClientHello| when constructing client hello messages.
    307   string nonce_hex_, pub_hex_, srct_hex_, scid_hex_;
    308   scoped_ptr<CryptoHandshakeMessage> server_config_;
    309 };
    310 
    311 // Run all CryptoServerTest with all combinations of
    312 // FLAGS_use_early_return_when_verifying_chlo and
    313 // FLAGS_send_quic_crypto_reject_reason.
    314 INSTANTIATE_TEST_CASE_P(CryptoServerTests,
    315                         CryptoServerTest,
    316                         ::testing::ValuesIn(GetTestParams()));
    317 
    318 TEST_P(CryptoServerTest, BadSNI) {
    319   static const char* kBadSNIs[] = {
    320     "",
    321     "foo",
    322     "#00",
    323     "#ff00",
    324     "127.0.0.1",
    325     "ffee::1",
    326   };
    327 
    328   string client_version = QuicUtils::TagToString(
    329       QuicVersionToQuicTag(supported_versions_.front()));
    330 
    331   for (size_t i = 0; i < arraysize(kBadSNIs); i++) {
    332     ShouldFailMentioning("SNI", InchoateClientHello(
    333         "CHLO",
    334         "SNI", kBadSNIs[i],
    335         "VER\0", client_version.data(),
    336         NULL));
    337     const HandshakeFailureReason kRejectReasons[] = {
    338       SERVER_CONFIG_INCHOATE_HELLO_FAILURE
    339     };
    340     CheckRejectReasons(kRejectReasons, arraysize(kRejectReasons));
    341   }
    342 }
    343 
    344 // TODO(rtenneti): Enable the DefaultCert test after implementing ProofSource.
    345 TEST_F(CryptoServerTest, DISABLED_DefaultCert) {
    346   // Check that the server replies with a default certificate when no SNI is
    347   // specified.
    348   ShouldSucceed(InchoateClientHello(
    349       "CHLO",
    350       "AEAD", "AESG",
    351       "KEXS", "C255",
    352       "SCID", scid_hex_.c_str(),
    353       "#004b5453", srct_hex_.c_str(),
    354       "PUBS", pub_hex_.c_str(),
    355       "NONC", nonce_hex_.c_str(),
    356       "$padding", static_cast<int>(kClientHelloMinimumSize),
    357       "PDMD", "X509",
    358       "VER\0", client_version_.data(),
    359       NULL));
    360 
    361   StringPiece cert, proof;
    362   EXPECT_TRUE(out_.GetStringPiece(kCertificateTag, &cert));
    363   EXPECT_TRUE(out_.GetStringPiece(kPROF, &proof));
    364   EXPECT_NE(0u, cert.size());
    365   EXPECT_NE(0u, proof.size());
    366   const HandshakeFailureReason kRejectReasons[] = {
    367     CLIENT_NONCE_UNKNOWN_FAILURE
    368   };
    369   CheckRejectReasons(kRejectReasons, arraysize(kRejectReasons));
    370 }
    371 
    372 TEST_P(CryptoServerTest, TooSmall) {
    373   ShouldFailMentioning("too small", CryptoTestUtils::Message(
    374         "CHLO",
    375         "VER\0", client_version_.data(),
    376         NULL));
    377   const HandshakeFailureReason kRejectReasons[] = {
    378     SERVER_CONFIG_INCHOATE_HELLO_FAILURE
    379   };
    380   CheckRejectReasons(kRejectReasons, arraysize(kRejectReasons));
    381 }
    382 
    383 TEST_P(CryptoServerTest, BadSourceAddressToken) {
    384   // Invalid source-address tokens should be ignored.
    385   static const char* kBadSourceAddressTokens[] = {
    386     "",
    387     "foo",
    388     "#0000",
    389     "#0000000000000000000000000000000000000000",
    390   };
    391 
    392   for (size_t i = 0; i < arraysize(kBadSourceAddressTokens); i++) {
    393     ShouldSucceed(InchoateClientHello(
    394         "CHLO",
    395         "STK", kBadSourceAddressTokens[i],
    396         "VER\0", client_version_.data(),
    397         NULL));
    398     const HandshakeFailureReason kRejectReasons[] = {
    399       SERVER_CONFIG_INCHOATE_HELLO_FAILURE
    400     };
    401     CheckRejectReasons(kRejectReasons, arraysize(kRejectReasons));
    402   }
    403 }
    404 
    405 TEST_P(CryptoServerTest, BadClientNonce) {
    406   // Invalid nonces should be ignored.
    407   static const char* kBadNonces[] = {
    408     "",
    409     "#0000",
    410     "#0000000000000000000000000000000000000000",
    411   };
    412 
    413   for (size_t i = 0; i < arraysize(kBadNonces); i++) {
    414     ShouldSucceed(InchoateClientHello(
    415         "CHLO",
    416         "NONC", kBadNonces[i],
    417         "VER\0", client_version_.data(),
    418         NULL));
    419     const HandshakeFailureReason kRejectReasons[] = {
    420       SERVER_CONFIG_INCHOATE_HELLO_FAILURE
    421     };
    422     CheckRejectReasons(kRejectReasons, arraysize(kRejectReasons));
    423   }
    424 }
    425 
    426 TEST_P(CryptoServerTest, DowngradeAttack) {
    427   if (supported_versions_.size() == 1) {
    428     // No downgrade attack is possible if the server only supports one version.
    429     return;
    430   }
    431   // Set the client's preferred version to a supported version that
    432   // is not the "current" version (supported_versions_.front()).
    433   string bad_version = QuicUtils::TagToString(
    434       QuicVersionToQuicTag(supported_versions_.back()));
    435 
    436   ShouldFailMentioning("Downgrade", InchoateClientHello(
    437       "CHLO",
    438       "VER\0", bad_version.data(),
    439       NULL));
    440   const HandshakeFailureReason kRejectReasons[] = {
    441     SERVER_CONFIG_INCHOATE_HELLO_FAILURE
    442   };
    443   CheckRejectReasons(kRejectReasons, arraysize(kRejectReasons));
    444 }
    445 
    446 TEST_P(CryptoServerTest, CorruptServerConfig) {
    447   // This tests corrupted server config.
    448   CryptoHandshakeMessage msg = CryptoTestUtils::Message(
    449       "CHLO",
    450       "AEAD", "AESG",
    451       "KEXS", "C255",
    452       "SCID", (string(1, 'X') + scid_hex_).c_str(),
    453       "#004b5453", srct_hex_.c_str(),
    454       "PUBS", pub_hex_.c_str(),
    455       "NONC", nonce_hex_.c_str(),
    456       "VER\0", client_version_.data(),
    457       "$padding", static_cast<int>(kClientHelloMinimumSize),
    458       NULL);
    459   ShouldSucceed(msg);
    460   ASSERT_EQ(kREJ, out_.tag());
    461   const HandshakeFailureReason kRejectReasons[] = {
    462     SERVER_CONFIG_UNKNOWN_CONFIG_FAILURE
    463   };
    464   CheckRejectReasons(kRejectReasons, arraysize(kRejectReasons));
    465 }
    466 
    467 TEST_P(CryptoServerTest, CorruptSourceAddressToken) {
    468   // This tests corrupted source address token.
    469   CryptoHandshakeMessage msg = CryptoTestUtils::Message(
    470       "CHLO",
    471       "AEAD", "AESG",
    472       "KEXS", "C255",
    473       "SCID", scid_hex_.c_str(),
    474       "#004b5453", (string(1, 'X') + srct_hex_).c_str(),
    475       "PUBS", pub_hex_.c_str(),
    476       "NONC", nonce_hex_.c_str(),
    477       "VER\0", client_version_.data(),
    478       "$padding", static_cast<int>(kClientHelloMinimumSize),
    479       NULL);
    480   ShouldSucceed(msg);
    481   ASSERT_EQ(kREJ, out_.tag());
    482   const HandshakeFailureReason kRejectReasons[] = {
    483     SOURCE_ADDRESS_TOKEN_DECRYPTION_FAILURE
    484   };
    485   CheckRejectReasons(kRejectReasons, arraysize(kRejectReasons));
    486 }
    487 
    488 TEST_P(CryptoServerTest, CorruptClientNonceAndSourceAddressToken) {
    489   // This test corrupts client nonce and source address token.
    490   CryptoHandshakeMessage msg = CryptoTestUtils::Message(
    491       "CHLO",
    492       "AEAD", "AESG",
    493       "KEXS", "C255",
    494       "SCID", scid_hex_.c_str(),
    495       "#004b5453", (string(1, 'X') + srct_hex_).c_str(),
    496       "PUBS", pub_hex_.c_str(),
    497       "NONC", (string(1, 'X') + nonce_hex_).c_str(),
    498       "VER\0", client_version_.data(),
    499       "$padding", static_cast<int>(kClientHelloMinimumSize),
    500       NULL);
    501   ShouldSucceed(msg);
    502   ASSERT_EQ(kREJ, out_.tag());
    503   const HandshakeFailureReason kRejectReasons[] = {
    504     SOURCE_ADDRESS_TOKEN_DECRYPTION_FAILURE,
    505     CLIENT_NONCE_INVALID_FAILURE
    506   };
    507   CheckRejectReasons(kRejectReasons, arraysize(kRejectReasons));
    508 }
    509 
    510 TEST_P(CryptoServerTest, CorruptMultipleTags) {
    511   // This test corrupts client nonce, server nonce and source address token.
    512   CryptoHandshakeMessage msg = CryptoTestUtils::Message(
    513       "CHLO",
    514       "AEAD", "AESG",
    515       "KEXS", "C255",
    516       "SCID", scid_hex_.c_str(),
    517       "#004b5453", (string(1, 'X') + srct_hex_).c_str(),
    518       "PUBS", pub_hex_.c_str(),
    519       "NONC", (string(1, 'X') + nonce_hex_).c_str(),
    520       "SNO\0", (string(1, 'X') + nonce_hex_).c_str(),
    521       "VER\0", client_version_.data(),
    522       "$padding", static_cast<int>(kClientHelloMinimumSize),
    523       NULL);
    524   ShouldSucceed(msg);
    525   ASSERT_EQ(kREJ, out_.tag());
    526   const HandshakeFailureReason kRejectReasons[] = {
    527     SOURCE_ADDRESS_TOKEN_DECRYPTION_FAILURE,
    528     CLIENT_NONCE_INVALID_FAILURE,
    529     SERVER_NONCE_DECRYPTION_FAILURE,
    530   };
    531   CheckRejectReasons(kRejectReasons, arraysize(kRejectReasons));
    532 }
    533 
    534 TEST_P(CryptoServerTest, ReplayProtection) {
    535   // This tests that disabling replay protection works.
    536   CryptoHandshakeMessage msg = CryptoTestUtils::Message(
    537       "CHLO",
    538       "AEAD", "AESG",
    539       "KEXS", "C255",
    540       "SCID", scid_hex_.c_str(),
    541       "#004b5453", srct_hex_.c_str(),
    542       "PUBS", pub_hex_.c_str(),
    543       "NONC", nonce_hex_.c_str(),
    544       "VER\0", client_version_.data(),
    545       "$padding", static_cast<int>(kClientHelloMinimumSize),
    546       NULL);
    547   ShouldSucceed(msg);
    548   // The message should be rejected because the strike-register is still
    549   // quiescent.
    550   ASSERT_EQ(kREJ, out_.tag());
    551 
    552   const HandshakeFailureReason kRejectReasons[] = {
    553     CLIENT_NONCE_UNKNOWN_FAILURE
    554   };
    555   CheckRejectReasons(kRejectReasons, arraysize(kRejectReasons));
    556 
    557   config_.set_replay_protection(false);
    558 
    559   ShouldSucceed(msg);
    560   // The message should be accepted now.
    561   ASSERT_EQ(kSHLO, out_.tag());
    562   CheckServerHello(out_);
    563 
    564   ShouldSucceed(msg);
    565   // The message should accepted twice when replay protection is off.
    566   ASSERT_EQ(kSHLO, out_.tag());
    567   CheckServerHello(out_);
    568 }
    569 
    570 TEST(CryptoServerConfigGenerationTest, Determinism) {
    571   // Test that using a deterministic PRNG causes the server-config to be
    572   // deterministic.
    573 
    574   MockRandom rand_a, rand_b;
    575   const QuicCryptoServerConfig::ConfigOptions options;
    576   MockClock clock;
    577 
    578   QuicCryptoServerConfig a(QuicCryptoServerConfig::TESTING, &rand_a);
    579   QuicCryptoServerConfig b(QuicCryptoServerConfig::TESTING, &rand_b);
    580   scoped_ptr<CryptoHandshakeMessage> scfg_a(
    581       a.AddDefaultConfig(&rand_a, &clock, options));
    582   scoped_ptr<CryptoHandshakeMessage> scfg_b(
    583       b.AddDefaultConfig(&rand_b, &clock, options));
    584 
    585   ASSERT_EQ(scfg_a->DebugString(), scfg_b->DebugString());
    586 }
    587 
    588 TEST(CryptoServerConfigGenerationTest, SCIDVaries) {
    589   // This test ensures that the server config ID varies for different server
    590   // configs.
    591 
    592   MockRandom rand_a, rand_b;
    593   const QuicCryptoServerConfig::ConfigOptions options;
    594   MockClock clock;
    595 
    596   QuicCryptoServerConfig a(QuicCryptoServerConfig::TESTING, &rand_a);
    597   rand_b.ChangeValue();
    598   QuicCryptoServerConfig b(QuicCryptoServerConfig::TESTING, &rand_b);
    599   scoped_ptr<CryptoHandshakeMessage> scfg_a(
    600       a.AddDefaultConfig(&rand_a, &clock, options));
    601   scoped_ptr<CryptoHandshakeMessage> scfg_b(
    602       b.AddDefaultConfig(&rand_b, &clock, options));
    603 
    604   StringPiece scid_a, scid_b;
    605   EXPECT_TRUE(scfg_a->GetStringPiece(kSCID, &scid_a));
    606   EXPECT_TRUE(scfg_b->GetStringPiece(kSCID, &scid_b));
    607 
    608   EXPECT_NE(scid_a, scid_b);
    609 }
    610 
    611 
    612 TEST(CryptoServerConfigGenerationTest, SCIDIsHashOfServerConfig) {
    613   MockRandom rand_a;
    614   const QuicCryptoServerConfig::ConfigOptions options;
    615   MockClock clock;
    616 
    617   QuicCryptoServerConfig a(QuicCryptoServerConfig::TESTING, &rand_a);
    618   scoped_ptr<CryptoHandshakeMessage> scfg(
    619       a.AddDefaultConfig(&rand_a, &clock, options));
    620 
    621   StringPiece scid;
    622   EXPECT_TRUE(scfg->GetStringPiece(kSCID, &scid));
    623   // Need to take a copy of |scid| has we're about to call |Erase|.
    624   const string scid_str(scid.as_string());
    625 
    626   scfg->Erase(kSCID);
    627   scfg->MarkDirty();
    628   const QuicData& serialized(scfg->GetSerialized());
    629 
    630   scoped_ptr<crypto::SecureHash> hash(
    631       crypto::SecureHash::Create(crypto::SecureHash::SHA256));
    632   hash->Update(serialized.data(), serialized.length());
    633   uint8 digest[16];
    634   hash->Finish(digest, sizeof(digest));
    635 
    636   ASSERT_EQ(scid.size(), sizeof(digest));
    637   EXPECT_EQ(0, memcmp(digest, scid_str.data(), sizeof(digest)));
    638 }
    639 
    640 class CryptoServerTestNoConfig : public CryptoServerTest {
    641  public:
    642   virtual void SetUp() {
    643     // Deliberately don't add a config so that we can test this situation.
    644   }
    645 };
    646 
    647 TEST_P(CryptoServerTestNoConfig, DontCrash) {
    648   ShouldFailMentioning("No config", InchoateClientHello(
    649       "CHLO",
    650       "VER\0", client_version_.data(),
    651       NULL));
    652 
    653   const HandshakeFailureReason kRejectReasons[] = {
    654     CLIENT_NONCE_UNKNOWN_FAILURE
    655   };
    656   CheckRejectReasons(kRejectReasons, arraysize(kRejectReasons));
    657 }
    658 
    659 class AsyncStrikeServerVerificationTest : public CryptoServerTest {
    660  protected:
    661   AsyncStrikeServerVerificationTest() {
    662   }
    663 
    664   virtual void SetUp() {
    665     const string kOrbit = "12345678";
    666     config_options_.orbit = kOrbit;
    667     strike_register_client_ = new DelayedVerifyStrikeRegisterClient(
    668         10000,  // strike_register_max_entries
    669         static_cast<uint32>(clock_.WallNow().ToUNIXSeconds()),
    670         60,  // strike_register_window_secs
    671         reinterpret_cast<const uint8 *>(kOrbit.data()),
    672         StrikeRegister::NO_STARTUP_PERIOD_NEEDED);
    673     config_.SetStrikeRegisterClient(strike_register_client_);
    674     CryptoServerTest::SetUp();
    675     strike_register_client_->StartDelayingVerification();
    676   }
    677 
    678   DelayedVerifyStrikeRegisterClient* strike_register_client_;
    679 };
    680 
    681 TEST_P(AsyncStrikeServerVerificationTest, AsyncReplayProtection) {
    682   // This tests async validation with a strike register works.
    683   CryptoHandshakeMessage msg = CryptoTestUtils::Message(
    684       "CHLO",
    685       "AEAD", "AESG",
    686       "KEXS", "C255",
    687       "SCID", scid_hex_.c_str(),
    688       "#004b5453", srct_hex_.c_str(),
    689       "PUBS", pub_hex_.c_str(),
    690       "NONC", nonce_hex_.c_str(),
    691       "VER\0", client_version_.data(),
    692       "$padding", static_cast<int>(kClientHelloMinimumSize),
    693       NULL);
    694 
    695   // Clear the message tag.
    696   out_.set_tag(0);
    697 
    698   bool called = false;
    699   RunValidate(msg, new ValidateCallback(this, true, "", &called));
    700   // The verification request was queued.
    701   ASSERT_FALSE(called);
    702   EXPECT_EQ(0u, out_.tag());
    703   EXPECT_EQ(1, strike_register_client_->PendingVerifications());
    704 
    705   // Continue processing the verification request.
    706   strike_register_client_->RunPendingVerifications();
    707   ASSERT_TRUE(called);
    708   EXPECT_EQ(0, strike_register_client_->PendingVerifications());
    709   // The message should be accepted now.
    710   EXPECT_EQ(kSHLO, out_.tag());
    711 
    712   // Rejected if replayed.
    713   RunValidate(msg, new ValidateCallback(this, true, "", &called));
    714   // The verification request was queued.
    715   ASSERT_FALSE(called);
    716   EXPECT_EQ(1, strike_register_client_->PendingVerifications());
    717 
    718   strike_register_client_->RunPendingVerifications();
    719   ASSERT_TRUE(called);
    720   EXPECT_EQ(0, strike_register_client_->PendingVerifications());
    721   // The message should be rejected now.
    722   EXPECT_EQ(kREJ, out_.tag());
    723 }
    724 
    725 }  // namespace test
    726 }  // namespace net
    727