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| 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 "net/quic/quic_crypto_client_stream.h" | |
| 6 | |
| 7 #include <memory> | |
| 8 #include <vector> | |
| 9 | |
| 10 #include "base/metrics/histogram_macros.h" | |
| 11 #include "base/metrics/sparse_histogram.h" | |
| 12 #include "base/strings/stringprintf.h" | |
| 13 #include "net/quic/crypto/crypto_protocol.h" | |
| 14 #include "net/quic/crypto/crypto_utils.h" | |
| 15 #include "net/quic/crypto/null_encrypter.h" | |
| 16 #include "net/quic/quic_flags.h" | |
| 17 #include "net/quic/quic_protocol.h" | |
| 18 #include "net/quic/quic_session.h" | |
| 19 #include "net/quic/quic_utils.h" | |
| 20 | |
| 21 using std::string; | |
| 22 using std::vector; | |
| 23 | |
| 24 namespace net { | |
| 25 | |
| 26 namespace { | |
| 27 | |
| 28 void AppendFixed(CryptoHandshakeMessage* message) { | |
| 29 if (FLAGS_quic_deprecate_kfixd) { | |
| 30 return; | |
| 31 } | |
| 32 vector<QuicTag> tags; | |
| 33 tags.push_back(kFIXD); | |
| 34 | |
| 35 const QuicTag* received_tags; | |
| 36 size_t received_tags_length; | |
| 37 QuicErrorCode error = | |
| 38 message->GetTaglist(kCOPT, &received_tags, &received_tags_length); | |
| 39 if (error == QUIC_NO_ERROR) { | |
| 40 for (size_t i = 0; i < received_tags_length; ++i) { | |
| 41 tags.push_back(received_tags[i]); | |
| 42 } | |
| 43 } | |
| 44 message->SetVector(kCOPT, tags); | |
| 45 } | |
| 46 | |
| 47 } // namespace | |
| 48 | |
| 49 QuicCryptoClientStreamBase::QuicCryptoClientStreamBase(QuicSession* session) | |
| 50 : QuicCryptoStream(session) {} | |
| 51 | |
| 52 QuicCryptoClientStream::ChannelIDSourceCallbackImpl:: | |
| 53 ChannelIDSourceCallbackImpl(QuicCryptoClientStream* stream) | |
| 54 : stream_(stream) {} | |
| 55 | |
| 56 QuicCryptoClientStream::ChannelIDSourceCallbackImpl:: | |
| 57 ~ChannelIDSourceCallbackImpl() {} | |
| 58 | |
| 59 void QuicCryptoClientStream::ChannelIDSourceCallbackImpl::Run( | |
| 60 std::unique_ptr<ChannelIDKey>* channel_id_key) { | |
| 61 if (stream_ == nullptr) { | |
| 62 return; | |
| 63 } | |
| 64 | |
| 65 stream_->channel_id_key_.reset(channel_id_key->release()); | |
| 66 stream_->channel_id_source_callback_run_ = true; | |
| 67 stream_->channel_id_source_callback_ = nullptr; | |
| 68 stream_->DoHandshakeLoop(nullptr); | |
| 69 | |
| 70 // The ChannelIDSource owns this object and will delete it when this method | |
| 71 // returns. | |
| 72 } | |
| 73 | |
| 74 void QuicCryptoClientStream::ChannelIDSourceCallbackImpl::Cancel() { | |
| 75 stream_ = nullptr; | |
| 76 } | |
| 77 | |
| 78 QuicCryptoClientStream::ProofVerifierCallbackImpl::ProofVerifierCallbackImpl( | |
| 79 QuicCryptoClientStream* stream) | |
| 80 : stream_(stream) {} | |
| 81 | |
| 82 QuicCryptoClientStream::ProofVerifierCallbackImpl:: | |
| 83 ~ProofVerifierCallbackImpl() {} | |
| 84 | |
| 85 void QuicCryptoClientStream::ProofVerifierCallbackImpl::Run( | |
| 86 bool ok, | |
| 87 const string& error_details, | |
| 88 std::unique_ptr<ProofVerifyDetails>* details) { | |
| 89 if (stream_ == nullptr) { | |
| 90 return; | |
| 91 } | |
| 92 | |
| 93 stream_->verify_ok_ = ok; | |
| 94 stream_->verify_error_details_ = error_details; | |
| 95 stream_->verify_details_.reset(details->release()); | |
| 96 stream_->proof_verify_callback_ = nullptr; | |
| 97 stream_->DoHandshakeLoop(nullptr); | |
| 98 | |
| 99 // The ProofVerifier owns this object and will delete it when this method | |
| 100 // returns. | |
| 101 } | |
| 102 | |
| 103 void QuicCryptoClientStream::ProofVerifierCallbackImpl::Cancel() { | |
| 104 stream_ = nullptr; | |
| 105 } | |
| 106 | |
| 107 QuicCryptoClientStream::QuicCryptoClientStream( | |
| 108 const QuicServerId& server_id, | |
| 109 QuicSession* session, | |
| 110 ProofVerifyContext* verify_context, | |
| 111 QuicCryptoClientConfig* crypto_config, | |
| 112 ProofHandler* proof_handler) | |
| 113 : QuicCryptoClientStreamBase(session), | |
| 114 next_state_(STATE_IDLE), | |
| 115 num_client_hellos_(0), | |
| 116 crypto_config_(crypto_config), | |
| 117 server_id_(server_id), | |
| 118 generation_counter_(0), | |
| 119 channel_id_sent_(false), | |
| 120 channel_id_source_callback_run_(false), | |
| 121 channel_id_source_callback_(nullptr), | |
| 122 verify_context_(verify_context), | |
| 123 proof_verify_callback_(nullptr), | |
| 124 proof_handler_(proof_handler), | |
| 125 stateless_reject_received_(false), | |
| 126 num_scup_messages_received_(0) { | |
| 127 DCHECK_EQ(Perspective::IS_CLIENT, session->connection()->perspective()); | |
| 128 } | |
| 129 | |
| 130 QuicCryptoClientStream::~QuicCryptoClientStream() { | |
| 131 if (channel_id_source_callback_) { | |
| 132 channel_id_source_callback_->Cancel(); | |
| 133 } | |
| 134 if (proof_verify_callback_) { | |
| 135 proof_verify_callback_->Cancel(); | |
| 136 } | |
| 137 } | |
| 138 | |
| 139 void QuicCryptoClientStream::OnHandshakeMessage( | |
| 140 const CryptoHandshakeMessage& message) { | |
| 141 QuicCryptoClientStreamBase::OnHandshakeMessage(message); | |
| 142 | |
| 143 if (message.tag() == kSCUP) { | |
| 144 if (!handshake_confirmed()) { | |
| 145 CloseConnectionWithDetails(QUIC_CRYPTO_UPDATE_BEFORE_HANDSHAKE_COMPLETE, | |
| 146 "Early SCUP disallowed"); | |
| 147 return; | |
| 148 } | |
| 149 | |
| 150 // |message| is an update from the server, so we treat it differently from a | |
| 151 // handshake message. | |
| 152 HandleServerConfigUpdateMessage(message); | |
| 153 num_scup_messages_received_++; | |
| 154 return; | |
| 155 } | |
| 156 | |
| 157 // Do not process handshake messages after the handshake is confirmed. | |
| 158 if (handshake_confirmed()) { | |
| 159 CloseConnectionWithDetails(QUIC_CRYPTO_MESSAGE_AFTER_HANDSHAKE_COMPLETE, | |
| 160 "Unexpected handshake message"); | |
| 161 return; | |
| 162 } | |
| 163 | |
| 164 DoHandshakeLoop(&message); | |
| 165 } | |
| 166 | |
| 167 void QuicCryptoClientStream::CryptoConnect() { | |
| 168 next_state_ = STATE_INITIALIZE; | |
| 169 DoHandshakeLoop(nullptr); | |
| 170 } | |
| 171 | |
| 172 int QuicCryptoClientStream::num_sent_client_hellos() const { | |
| 173 return num_client_hellos_; | |
| 174 } | |
| 175 | |
| 176 int QuicCryptoClientStream::num_scup_messages_received() const { | |
| 177 return num_scup_messages_received_; | |
| 178 } | |
| 179 | |
| 180 // Used in Chromium, but not in the server. | |
| 181 bool QuicCryptoClientStream::WasChannelIDSent() const { | |
| 182 return channel_id_sent_; | |
| 183 } | |
| 184 | |
| 185 bool QuicCryptoClientStream::WasChannelIDSourceCallbackRun() const { | |
| 186 return channel_id_source_callback_run_; | |
| 187 } | |
| 188 | |
| 189 void QuicCryptoClientStream::HandleServerConfigUpdateMessage( | |
| 190 const CryptoHandshakeMessage& server_config_update) { | |
| 191 DCHECK(server_config_update.tag() == kSCUP); | |
| 192 string error_details; | |
| 193 QuicCryptoClientConfig::CachedState* cached = | |
| 194 crypto_config_->LookupOrCreate(server_id_); | |
| 195 QuicErrorCode error = crypto_config_->ProcessServerConfigUpdate( | |
| 196 server_config_update, session()->connection()->clock()->WallNow(), | |
| 197 session()->connection()->version(), cached->chlo_hash(), cached, | |
| 198 &crypto_negotiated_params_, &error_details); | |
| 199 | |
| 200 if (error != QUIC_NO_ERROR) { | |
| 201 CloseConnectionWithDetails( | |
| 202 error, "Server config update invalid: " + error_details); | |
| 203 return; | |
| 204 } | |
| 205 | |
| 206 DCHECK(handshake_confirmed()); | |
| 207 if (proof_verify_callback_) { | |
| 208 proof_verify_callback_->Cancel(); | |
| 209 } | |
| 210 next_state_ = STATE_INITIALIZE_SCUP; | |
| 211 DoHandshakeLoop(nullptr); | |
| 212 } | |
| 213 | |
| 214 void QuicCryptoClientStream::DoHandshakeLoop(const CryptoHandshakeMessage* in) { | |
| 215 QuicCryptoClientConfig::CachedState* cached = | |
| 216 crypto_config_->LookupOrCreate(server_id_); | |
| 217 | |
| 218 QuicAsyncStatus rv = QUIC_SUCCESS; | |
| 219 do { | |
| 220 CHECK_NE(STATE_NONE, next_state_); | |
| 221 const State state = next_state_; | |
| 222 next_state_ = STATE_IDLE; | |
| 223 rv = QUIC_SUCCESS; | |
| 224 switch (state) { | |
| 225 case STATE_INITIALIZE: | |
| 226 DoInitialize(cached); | |
| 227 break; | |
| 228 case STATE_SEND_CHLO: | |
| 229 DoSendCHLO(cached); | |
| 230 return; // return waiting to hear from server. | |
| 231 case STATE_RECV_REJ: | |
| 232 DoReceiveREJ(in, cached); | |
| 233 break; | |
| 234 case STATE_VERIFY_PROOF: | |
| 235 rv = DoVerifyProof(cached); | |
| 236 break; | |
| 237 case STATE_VERIFY_PROOF_COMPLETE: | |
| 238 DoVerifyProofComplete(cached); | |
| 239 break; | |
| 240 case STATE_GET_CHANNEL_ID: | |
| 241 rv = DoGetChannelID(cached); | |
| 242 break; | |
| 243 case STATE_GET_CHANNEL_ID_COMPLETE: | |
| 244 DoGetChannelIDComplete(); | |
| 245 break; | |
| 246 case STATE_RECV_SHLO: | |
| 247 DoReceiveSHLO(in, cached); | |
| 248 break; | |
| 249 case STATE_IDLE: | |
| 250 // This means that the peer sent us a message that we weren't expecting. | |
| 251 CloseConnectionWithDetails(QUIC_INVALID_CRYPTO_MESSAGE_TYPE, | |
| 252 "Handshake in idle state"); | |
| 253 return; | |
| 254 case STATE_INITIALIZE_SCUP: | |
| 255 DoInitializeServerConfigUpdate(cached); | |
| 256 break; | |
| 257 case STATE_NONE: | |
| 258 NOTREACHED(); | |
| 259 return; // We are done. | |
| 260 } | |
| 261 } while (rv != QUIC_PENDING && next_state_ != STATE_NONE); | |
| 262 } | |
| 263 | |
| 264 void QuicCryptoClientStream::DoInitialize( | |
| 265 QuicCryptoClientConfig::CachedState* cached) { | |
| 266 if (!cached->IsEmpty() && !cached->signature().empty()) { | |
| 267 // Note that we verify the proof even if the cached proof is valid. | |
| 268 // This allows us to respond to CA trust changes or certificate | |
| 269 // expiration because it may have been a while since we last verified | |
| 270 // the proof. | |
| 271 DCHECK(crypto_config_->proof_verifier()); | |
| 272 // Track proof verification time when cached server config is used. | |
| 273 proof_verify_start_time_ = base::TimeTicks::Now(); | |
| 274 chlo_hash_ = cached->chlo_hash(); | |
| 275 // If the cached state needs to be verified, do it now. | |
| 276 next_state_ = STATE_VERIFY_PROOF; | |
| 277 } else { | |
| 278 next_state_ = STATE_GET_CHANNEL_ID; | |
| 279 } | |
| 280 } | |
| 281 | |
| 282 void QuicCryptoClientStream::DoSendCHLO( | |
| 283 QuicCryptoClientConfig::CachedState* cached) { | |
| 284 if (stateless_reject_received_) { | |
| 285 // If we've gotten to this point, we've sent at least one hello | |
| 286 // and received a stateless reject in response. We cannot | |
| 287 // continue to send hellos because the server has abandoned state | |
| 288 // for this connection. Abandon further handshakes. | |
| 289 next_state_ = STATE_NONE; | |
| 290 if (session()->connection()->connected()) { | |
| 291 session()->connection()->CloseConnection( | |
| 292 QUIC_CRYPTO_HANDSHAKE_STATELESS_REJECT, "stateless reject received", | |
| 293 ConnectionCloseBehavior::SILENT_CLOSE); | |
| 294 } | |
| 295 return; | |
| 296 } | |
| 297 | |
| 298 // Send the client hello in plaintext. | |
| 299 session()->connection()->SetDefaultEncryptionLevel(ENCRYPTION_NONE); | |
| 300 encryption_established_ = false; | |
| 301 if (num_client_hellos_ > kMaxClientHellos) { | |
| 302 CloseConnectionWithDetails( | |
| 303 QUIC_CRYPTO_TOO_MANY_REJECTS, | |
| 304 base::StringPrintf("More than %u rejects", kMaxClientHellos).c_str()); | |
| 305 return; | |
| 306 } | |
| 307 num_client_hellos_++; | |
| 308 | |
| 309 CryptoHandshakeMessage out; | |
| 310 DCHECK(session() != nullptr); | |
| 311 DCHECK(session()->config() != nullptr); | |
| 312 // Send all the options, regardless of whether we're sending an | |
| 313 // inchoate or subsequent hello. | |
| 314 session()->config()->ToHandshakeMessage(&out); | |
| 315 | |
| 316 // This call and function should be removed when | |
| 317 // FLAGS_quic_deprecate_kfixd is removed. | |
| 318 AppendFixed(&out); | |
| 319 | |
| 320 // Send a local timestamp to the server. | |
| 321 out.SetValue(kCTIM, | |
| 322 session()->connection()->clock()->WallNow().ToUNIXSeconds()); | |
| 323 | |
| 324 if (!cached->IsComplete(session()->connection()->clock()->WallNow())) { | |
| 325 crypto_config_->FillInchoateClientHello( | |
| 326 server_id_, session()->connection()->supported_versions().front(), | |
| 327 cached, session()->connection()->random_generator(), | |
| 328 /* demand_x509_proof= */ true, &crypto_negotiated_params_, &out); | |
| 329 // Pad the inchoate client hello to fill up a packet. | |
| 330 const QuicByteCount kFramingOverhead = 50; // A rough estimate. | |
| 331 const QuicByteCount max_packet_size = | |
| 332 session()->connection()->max_packet_length(); | |
| 333 if (max_packet_size <= kFramingOverhead) { | |
| 334 DLOG(DFATAL) << "max_packet_length (" << max_packet_size | |
| 335 << ") has no room for framing overhead."; | |
| 336 CloseConnectionWithDetails(QUIC_INTERNAL_ERROR, | |
| 337 "max_packet_size too smalll"); | |
| 338 return; | |
| 339 } | |
| 340 if (kClientHelloMinimumSize > max_packet_size - kFramingOverhead) { | |
| 341 DLOG(DFATAL) << "Client hello won't fit in a single packet."; | |
| 342 CloseConnectionWithDetails(QUIC_INTERNAL_ERROR, "CHLO too large"); | |
| 343 return; | |
| 344 } | |
| 345 out.set_minimum_size( | |
| 346 static_cast<size_t>(max_packet_size - kFramingOverhead)); | |
| 347 next_state_ = STATE_RECV_REJ; | |
| 348 CryptoUtils::HashHandshakeMessage(out, &chlo_hash_); | |
| 349 SendHandshakeMessage(out); | |
| 350 return; | |
| 351 } | |
| 352 | |
| 353 // If the server nonce is empty, copy over the server nonce from a previous | |
| 354 // SREJ, if there is one. | |
| 355 if (FLAGS_enable_quic_stateless_reject_support && | |
| 356 crypto_negotiated_params_.server_nonce.empty() && | |
| 357 cached->has_server_nonce()) { | |
| 358 crypto_negotiated_params_.server_nonce = cached->GetNextServerNonce(); | |
| 359 DCHECK(!crypto_negotiated_params_.server_nonce.empty()); | |
| 360 } | |
| 361 | |
| 362 string error_details; | |
| 363 QuicErrorCode error = crypto_config_->FillClientHello( | |
| 364 server_id_, session()->connection()->connection_id(), | |
| 365 session()->connection()->version(), | |
| 366 session()->connection()->supported_versions().front(), cached, | |
| 367 session()->connection()->clock()->WallNow(), | |
| 368 session()->connection()->random_generator(), channel_id_key_.get(), | |
| 369 &crypto_negotiated_params_, &out, &error_details); | |
| 370 if (error != QUIC_NO_ERROR) { | |
| 371 // Flush the cached config so that, if it's bad, the server has a | |
| 372 // chance to send us another in the future. | |
| 373 cached->InvalidateServerConfig(); | |
| 374 CloseConnectionWithDetails(error, error_details); | |
| 375 return; | |
| 376 } | |
| 377 CryptoUtils::HashHandshakeMessage(out, &chlo_hash_); | |
| 378 channel_id_sent_ = (channel_id_key_.get() != nullptr); | |
| 379 if (cached->proof_verify_details()) { | |
| 380 proof_handler_->OnProofVerifyDetailsAvailable( | |
| 381 *cached->proof_verify_details()); | |
| 382 } | |
| 383 next_state_ = STATE_RECV_SHLO; | |
| 384 SendHandshakeMessage(out); | |
| 385 // Be prepared to decrypt with the new server write key. | |
| 386 session()->connection()->SetAlternativeDecrypter( | |
| 387 ENCRYPTION_INITIAL, | |
| 388 crypto_negotiated_params_.initial_crypters.decrypter.release(), | |
| 389 true /* latch once used */); | |
| 390 // Send subsequent packets under encryption on the assumption that the | |
| 391 // server will accept the handshake. | |
| 392 session()->connection()->SetEncrypter( | |
| 393 ENCRYPTION_INITIAL, | |
| 394 crypto_negotiated_params_.initial_crypters.encrypter.release()); | |
| 395 session()->connection()->SetDefaultEncryptionLevel(ENCRYPTION_INITIAL); | |
| 396 | |
| 397 // TODO(ianswett): Merge ENCRYPTION_REESTABLISHED and | |
| 398 // ENCRYPTION_FIRST_ESTABLSIHED | |
| 399 encryption_established_ = true; | |
| 400 session()->OnCryptoHandshakeEvent(QuicSession::ENCRYPTION_REESTABLISHED); | |
| 401 } | |
| 402 | |
| 403 void QuicCryptoClientStream::DoReceiveREJ( | |
| 404 const CryptoHandshakeMessage* in, | |
| 405 QuicCryptoClientConfig::CachedState* cached) { | |
| 406 // We sent a dummy CHLO because we didn't have enough information to | |
| 407 // perform a handshake, or we sent a full hello that the server | |
| 408 // rejected. Here we hope to have a REJ that contains the information | |
| 409 // that we need. | |
| 410 if ((in->tag() != kREJ) && (in->tag() != kSREJ)) { | |
| 411 next_state_ = STATE_NONE; | |
| 412 CloseConnectionWithDetails(QUIC_INVALID_CRYPTO_MESSAGE_TYPE, | |
| 413 "Expected REJ"); | |
| 414 return; | |
| 415 } | |
| 416 | |
| 417 const uint32_t* reject_reasons; | |
| 418 size_t num_reject_reasons; | |
| 419 static_assert(sizeof(QuicTag) == sizeof(uint32_t), "header out of sync"); | |
| 420 if (in->GetTaglist(kRREJ, &reject_reasons, &num_reject_reasons) == | |
| 421 QUIC_NO_ERROR) { | |
| 422 uint32_t packed_error = 0; | |
| 423 for (size_t i = 0; i < num_reject_reasons; ++i) { | |
| 424 // HANDSHAKE_OK is 0 and don't report that as error. | |
| 425 if (reject_reasons[i] == HANDSHAKE_OK || reject_reasons[i] >= 32) { | |
| 426 continue; | |
| 427 } | |
| 428 HandshakeFailureReason reason = | |
| 429 static_cast<HandshakeFailureReason>(reject_reasons[i]); | |
| 430 packed_error |= 1 << (reason - 1); | |
| 431 } | |
| 432 DVLOG(1) << "Reasons for rejection: " << packed_error; | |
| 433 if (num_client_hellos_ == kMaxClientHellos) { | |
| 434 UMA_HISTOGRAM_SPARSE_SLOWLY("Net.QuicClientHelloRejectReasons.TooMany", | |
| 435 packed_error); | |
| 436 } | |
| 437 UMA_HISTOGRAM_SPARSE_SLOWLY("Net.QuicClientHelloRejectReasons.Secure", | |
| 438 packed_error); | |
| 439 } | |
| 440 | |
| 441 stateless_reject_received_ = in->tag() == kSREJ; | |
| 442 string error_details; | |
| 443 QuicErrorCode error = crypto_config_->ProcessRejection( | |
| 444 *in, session()->connection()->clock()->WallNow(), | |
| 445 session()->connection()->version(), chlo_hash_, cached, | |
| 446 &crypto_negotiated_params_, &error_details); | |
| 447 | |
| 448 if (error != QUIC_NO_ERROR) { | |
| 449 next_state_ = STATE_NONE; | |
| 450 CloseConnectionWithDetails(error, error_details); | |
| 451 return; | |
| 452 } | |
| 453 if (!cached->proof_valid()) { | |
| 454 if (!cached->signature().empty()) { | |
| 455 // Note that we only verify the proof if the cached proof is not | |
| 456 // valid. If the cached proof is valid here, someone else must have | |
| 457 // just added the server config to the cache and verified the proof, | |
| 458 // so we can assume no CA trust changes or certificate expiration | |
| 459 // has happened since then. | |
| 460 next_state_ = STATE_VERIFY_PROOF; | |
| 461 return; | |
| 462 } | |
| 463 } | |
| 464 next_state_ = STATE_GET_CHANNEL_ID; | |
| 465 } | |
| 466 | |
| 467 QuicAsyncStatus QuicCryptoClientStream::DoVerifyProof( | |
| 468 QuicCryptoClientConfig::CachedState* cached) { | |
| 469 ProofVerifier* verifier = crypto_config_->proof_verifier(); | |
| 470 DCHECK(verifier); | |
| 471 next_state_ = STATE_VERIFY_PROOF_COMPLETE; | |
| 472 generation_counter_ = cached->generation_counter(); | |
| 473 | |
| 474 ProofVerifierCallbackImpl* proof_verify_callback = | |
| 475 new ProofVerifierCallbackImpl(this); | |
| 476 | |
| 477 verify_ok_ = false; | |
| 478 | |
| 479 QuicAsyncStatus status = verifier->VerifyProof( | |
| 480 server_id_.host(), server_id_.port(), cached->server_config(), | |
| 481 session()->connection()->version(), chlo_hash_, cached->certs(), | |
| 482 cached->cert_sct(), cached->signature(), verify_context_.get(), | |
| 483 &verify_error_details_, &verify_details_, | |
| 484 std::unique_ptr<ProofVerifierCallback>(proof_verify_callback)); | |
| 485 | |
| 486 switch (status) { | |
| 487 case QUIC_PENDING: | |
| 488 proof_verify_callback_ = proof_verify_callback; | |
| 489 DVLOG(1) << "Doing VerifyProof"; | |
| 490 break; | |
| 491 case QUIC_FAILURE: | |
| 492 break; | |
| 493 case QUIC_SUCCESS: | |
| 494 verify_ok_ = true; | |
| 495 break; | |
| 496 } | |
| 497 return status; | |
| 498 } | |
| 499 | |
| 500 void QuicCryptoClientStream::DoVerifyProofComplete( | |
| 501 QuicCryptoClientConfig::CachedState* cached) { | |
| 502 if (!proof_verify_start_time_.is_null()) { | |
| 503 UMA_HISTOGRAM_TIMES("Net.QuicSession.VerifyProofTime.CachedServerConfig", | |
| 504 base::TimeTicks::Now() - proof_verify_start_time_); | |
| 505 } | |
| 506 if (!verify_ok_) { | |
| 507 if (verify_details_.get()) { | |
| 508 proof_handler_->OnProofVerifyDetailsAvailable(*verify_details_); | |
| 509 } | |
| 510 if (num_client_hellos_ == 0) { | |
| 511 cached->Clear(); | |
| 512 next_state_ = STATE_INITIALIZE; | |
| 513 return; | |
| 514 } | |
| 515 next_state_ = STATE_NONE; | |
| 516 UMA_HISTOGRAM_BOOLEAN("Net.QuicVerifyProofFailed.HandshakeConfirmed", | |
| 517 handshake_confirmed()); | |
| 518 CloseConnectionWithDetails(QUIC_PROOF_INVALID, | |
| 519 "Proof invalid: " + verify_error_details_); | |
| 520 return; | |
| 521 } | |
| 522 | |
| 523 // Check if generation_counter has changed between STATE_VERIFY_PROOF and | |
| 524 // STATE_VERIFY_PROOF_COMPLETE state changes. | |
| 525 if (generation_counter_ != cached->generation_counter()) { | |
| 526 next_state_ = STATE_VERIFY_PROOF; | |
| 527 } else { | |
| 528 SetCachedProofValid(cached); | |
| 529 cached->SetProofVerifyDetails(verify_details_.release()); | |
| 530 if (!handshake_confirmed()) { | |
| 531 next_state_ = STATE_GET_CHANNEL_ID; | |
| 532 } else { | |
| 533 // TODO: Enable Expect-Staple. https://crbug.com/631101 | |
| 534 next_state_ = STATE_NONE; | |
| 535 } | |
| 536 } | |
| 537 } | |
| 538 | |
| 539 QuicAsyncStatus QuicCryptoClientStream::DoGetChannelID( | |
| 540 QuicCryptoClientConfig::CachedState* cached) { | |
| 541 next_state_ = STATE_GET_CHANNEL_ID_COMPLETE; | |
| 542 channel_id_key_.reset(); | |
| 543 if (!RequiresChannelID(cached)) { | |
| 544 next_state_ = STATE_SEND_CHLO; | |
| 545 return QUIC_SUCCESS; | |
| 546 } | |
| 547 | |
| 548 ChannelIDSourceCallbackImpl* channel_id_source_callback = | |
| 549 new ChannelIDSourceCallbackImpl(this); | |
| 550 QuicAsyncStatus status = crypto_config_->channel_id_source()->GetChannelIDKey( | |
| 551 server_id_.host(), &channel_id_key_, channel_id_source_callback); | |
| 552 | |
| 553 switch (status) { | |
| 554 case QUIC_PENDING: | |
| 555 channel_id_source_callback_ = channel_id_source_callback; | |
| 556 DVLOG(1) << "Looking up channel ID"; | |
| 557 break; | |
| 558 case QUIC_FAILURE: | |
| 559 next_state_ = STATE_NONE; | |
| 560 delete channel_id_source_callback; | |
| 561 CloseConnectionWithDetails(QUIC_INVALID_CHANNEL_ID_SIGNATURE, | |
| 562 "Channel ID lookup failed"); | |
| 563 break; | |
| 564 case QUIC_SUCCESS: | |
| 565 delete channel_id_source_callback; | |
| 566 break; | |
| 567 } | |
| 568 return status; | |
| 569 } | |
| 570 | |
| 571 void QuicCryptoClientStream::DoGetChannelIDComplete() { | |
| 572 if (!channel_id_key_.get()) { | |
| 573 next_state_ = STATE_NONE; | |
| 574 CloseConnectionWithDetails(QUIC_INVALID_CHANNEL_ID_SIGNATURE, | |
| 575 "Channel ID lookup failed"); | |
| 576 return; | |
| 577 } | |
| 578 next_state_ = STATE_SEND_CHLO; | |
| 579 } | |
| 580 | |
| 581 void QuicCryptoClientStream::DoReceiveSHLO( | |
| 582 const CryptoHandshakeMessage* in, | |
| 583 QuicCryptoClientConfig::CachedState* cached) { | |
| 584 next_state_ = STATE_NONE; | |
| 585 // We sent a CHLO that we expected to be accepted and now we're | |
| 586 // hoping for a SHLO from the server to confirm that. First check | |
| 587 // to see whether the response was a reject, and if so, move on to | |
| 588 // the reject-processing state. | |
| 589 if ((in->tag() == kREJ) || (in->tag() == kSREJ)) { | |
| 590 // alternative_decrypter will be nullptr if the original alternative | |
| 591 // decrypter latched and became the primary decrypter. That happens | |
| 592 // if we received a message encrypted with the INITIAL key. | |
| 593 if (session()->connection()->alternative_decrypter() == nullptr) { | |
| 594 // The rejection was sent encrypted! | |
| 595 CloseConnectionWithDetails(QUIC_CRYPTO_ENCRYPTION_LEVEL_INCORRECT, | |
| 596 "encrypted REJ message"); | |
| 597 return; | |
| 598 } | |
| 599 next_state_ = STATE_RECV_REJ; | |
| 600 return; | |
| 601 } | |
| 602 | |
| 603 if (in->tag() != kSHLO) { | |
| 604 CloseConnectionWithDetails(QUIC_INVALID_CRYPTO_MESSAGE_TYPE, | |
| 605 "Expected SHLO or REJ"); | |
| 606 return; | |
| 607 } | |
| 608 | |
| 609 // alternative_decrypter will be nullptr if the original alternative | |
| 610 // decrypter latched and became the primary decrypter. That happens | |
| 611 // if we received a message encrypted with the INITIAL key. | |
| 612 if (session()->connection()->alternative_decrypter() != nullptr) { | |
| 613 // The server hello was sent without encryption. | |
| 614 CloseConnectionWithDetails(QUIC_CRYPTO_ENCRYPTION_LEVEL_INCORRECT, | |
| 615 "unencrypted SHLO message"); | |
| 616 return; | |
| 617 } | |
| 618 | |
| 619 string error_details; | |
| 620 QuicErrorCode error = crypto_config_->ProcessServerHello( | |
| 621 *in, session()->connection()->connection_id(), | |
| 622 session()->connection()->version(), | |
| 623 session()->connection()->server_supported_versions(), cached, | |
| 624 &crypto_negotiated_params_, &error_details); | |
| 625 | |
| 626 if (error != QUIC_NO_ERROR) { | |
| 627 CloseConnectionWithDetails(error, "Server hello invalid: " + error_details); | |
| 628 return; | |
| 629 } | |
| 630 error = session()->config()->ProcessPeerHello(*in, SERVER, &error_details); | |
| 631 if (error != QUIC_NO_ERROR) { | |
| 632 CloseConnectionWithDetails(error, "Server hello invalid: " + error_details); | |
| 633 return; | |
| 634 } | |
| 635 session()->OnConfigNegotiated(); | |
| 636 | |
| 637 CrypterPair* crypters = &crypto_negotiated_params_.forward_secure_crypters; | |
| 638 // TODO(agl): we don't currently latch this decrypter because the idea | |
| 639 // has been floated that the server shouldn't send packets encrypted | |
| 640 // with the FORWARD_SECURE key until it receives a FORWARD_SECURE | |
| 641 // packet from the client. | |
| 642 session()->connection()->SetAlternativeDecrypter( | |
| 643 ENCRYPTION_FORWARD_SECURE, crypters->decrypter.release(), | |
| 644 false /* don't latch */); | |
| 645 session()->connection()->SetEncrypter(ENCRYPTION_FORWARD_SECURE, | |
| 646 crypters->encrypter.release()); | |
| 647 session()->connection()->SetDefaultEncryptionLevel(ENCRYPTION_FORWARD_SECURE); | |
| 648 | |
| 649 handshake_confirmed_ = true; | |
| 650 session()->OnCryptoHandshakeEvent(QuicSession::HANDSHAKE_CONFIRMED); | |
| 651 session()->connection()->OnHandshakeComplete(); | |
| 652 } | |
| 653 | |
| 654 void QuicCryptoClientStream::DoInitializeServerConfigUpdate( | |
| 655 QuicCryptoClientConfig::CachedState* cached) { | |
| 656 bool update_ignored = false; | |
| 657 if (!cached->IsEmpty() && !cached->signature().empty()) { | |
| 658 // Note that we verify the proof even if the cached proof is valid. | |
| 659 DCHECK(crypto_config_->proof_verifier()); | |
| 660 next_state_ = STATE_VERIFY_PROOF; | |
| 661 } else { | |
| 662 update_ignored = true; | |
| 663 next_state_ = STATE_NONE; | |
| 664 } | |
| 665 UMA_HISTOGRAM_COUNTS("Net.QuicNumServerConfig.UpdateMessagesIgnored", | |
| 666 update_ignored); | |
| 667 } | |
| 668 | |
| 669 void QuicCryptoClientStream::SetCachedProofValid( | |
| 670 QuicCryptoClientConfig::CachedState* cached) { | |
| 671 cached->SetProofValid(); | |
| 672 proof_handler_->OnProofValid(*cached); | |
| 673 } | |
| 674 | |
| 675 bool QuicCryptoClientStream::RequiresChannelID( | |
| 676 QuicCryptoClientConfig::CachedState* cached) { | |
| 677 if (server_id_.privacy_mode() == PRIVACY_MODE_ENABLED || | |
| 678 !crypto_config_->channel_id_source()) { | |
| 679 return false; | |
| 680 } | |
| 681 const CryptoHandshakeMessage* scfg = cached->GetServerConfig(); | |
| 682 if (!scfg) { // scfg may be null then we send an inchoate CHLO. | |
| 683 return false; | |
| 684 } | |
| 685 const QuicTag* their_proof_demands; | |
| 686 size_t num_their_proof_demands; | |
| 687 if (scfg->GetTaglist(kPDMD, &their_proof_demands, &num_their_proof_demands) != | |
| 688 QUIC_NO_ERROR) { | |
| 689 return false; | |
| 690 } | |
| 691 for (size_t i = 0; i < num_their_proof_demands; i++) { | |
| 692 if (their_proof_demands[i] == kCHID) { | |
| 693 return true; | |
| 694 } | |
| 695 } | |
| 696 return false; | |
| 697 } | |
| 698 | |
| 699 } // namespace net | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2193073003:
Move shared files in net/quic/ into net/quic/core/ (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master