Move shared files in net/quic/ into net/quic/core/

net/quic/quic_crypto_client_stream.cc

Index: net/quic/quic_crypto_client_stream.cc
diff --git a/net/quic/quic_crypto_client_stream.cc b/net/quic/quic_crypto_client_stream.cc
deleted file mode 100644
index 9300bc5007c36551d03869bdf355d8223fc18583..0000000000000000000000000000000000000000
--- a/net/quic/quic_crypto_client_stream.cc
+++ /dev/null
@@ -1,699 +0,0 @@
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "net/quic/quic_crypto_client_stream.h"
-
-#include <memory>
-#include <vector>
-
-#include "base/metrics/histogram_macros.h"
-#include "base/metrics/sparse_histogram.h"
-#include "base/strings/stringprintf.h"
-#include "net/quic/crypto/crypto_protocol.h"
-#include "net/quic/crypto/crypto_utils.h"
-#include "net/quic/crypto/null_encrypter.h"
-#include "net/quic/quic_flags.h"
-#include "net/quic/quic_protocol.h"
-#include "net/quic/quic_session.h"
-#include "net/quic/quic_utils.h"
-
-using std::string;
-using std::vector;
-
-namespace net {
-
-namespace {
-
-void AppendFixed(CryptoHandshakeMessage* message) {
-  if (FLAGS_quic_deprecate_kfixd) {
-    return;
-  }
-  vector<QuicTag> tags;
-  tags.push_back(kFIXD);
-
-  const QuicTag* received_tags;
-  size_t received_tags_length;
-  QuicErrorCode error =
-      message->GetTaglist(kCOPT, &received_tags, &received_tags_length);
-  if (error == QUIC_NO_ERROR) {
-    for (size_t i = 0; i < received_tags_length; ++i) {
-      tags.push_back(received_tags[i]);
-    }
-  }
-  message->SetVector(kCOPT, tags);
-}
-
-}  // namespace
-
-QuicCryptoClientStreamBase::QuicCryptoClientStreamBase(QuicSession* session)
-    : QuicCryptoStream(session) {}
-
-QuicCryptoClientStream::ChannelIDSourceCallbackImpl::
-    ChannelIDSourceCallbackImpl(QuicCryptoClientStream* stream)
-    : stream_(stream) {}
-
-QuicCryptoClientStream::ChannelIDSourceCallbackImpl::
-    ~ChannelIDSourceCallbackImpl() {}
-
-void QuicCryptoClientStream::ChannelIDSourceCallbackImpl::Run(
-    std::unique_ptr<ChannelIDKey>* channel_id_key) {
-  if (stream_ == nullptr) {
-    return;
-  }
-
-  stream_->channel_id_key_.reset(channel_id_key->release());
-  stream_->channel_id_source_callback_run_ = true;
-  stream_->channel_id_source_callback_ = nullptr;
-  stream_->DoHandshakeLoop(nullptr);
-
-  // The ChannelIDSource owns this object and will delete it when this method
-  // returns.
-}
-
-void QuicCryptoClientStream::ChannelIDSourceCallbackImpl::Cancel() {
-  stream_ = nullptr;
-}
-
-QuicCryptoClientStream::ProofVerifierCallbackImpl::ProofVerifierCallbackImpl(
-    QuicCryptoClientStream* stream)
-    : stream_(stream) {}
-
-QuicCryptoClientStream::ProofVerifierCallbackImpl::
-    ~ProofVerifierCallbackImpl() {}
-
-void QuicCryptoClientStream::ProofVerifierCallbackImpl::Run(
-    bool ok,
-    const string& error_details,
-    std::unique_ptr<ProofVerifyDetails>* details) {
-  if (stream_ == nullptr) {
-    return;
-  }
-
-  stream_->verify_ok_ = ok;
-  stream_->verify_error_details_ = error_details;
-  stream_->verify_details_.reset(details->release());
-  stream_->proof_verify_callback_ = nullptr;
-  stream_->DoHandshakeLoop(nullptr);
-
-  // The ProofVerifier owns this object and will delete it when this method
-  // returns.
-}
-
-void QuicCryptoClientStream::ProofVerifierCallbackImpl::Cancel() {
-  stream_ = nullptr;
-}
-
-QuicCryptoClientStream::QuicCryptoClientStream(
-    const QuicServerId& server_id,
-    QuicSession* session,
-    ProofVerifyContext* verify_context,
-    QuicCryptoClientConfig* crypto_config,
-    ProofHandler* proof_handler)
-    : QuicCryptoClientStreamBase(session),
-      next_state_(STATE_IDLE),
-      num_client_hellos_(0),
-      crypto_config_(crypto_config),
-      server_id_(server_id),
-      generation_counter_(0),
-      channel_id_sent_(false),
-      channel_id_source_callback_run_(false),
-      channel_id_source_callback_(nullptr),
-      verify_context_(verify_context),
-      proof_verify_callback_(nullptr),
-      proof_handler_(proof_handler),
-      stateless_reject_received_(false),
-      num_scup_messages_received_(0) {
-  DCHECK_EQ(Perspective::IS_CLIENT, session->connection()->perspective());
-}
-
-QuicCryptoClientStream::~QuicCryptoClientStream() {
-  if (channel_id_source_callback_) {
-    channel_id_source_callback_->Cancel();
-  }
-  if (proof_verify_callback_) {
-    proof_verify_callback_->Cancel();
-  }
-}
-
-void QuicCryptoClientStream::OnHandshakeMessage(
-    const CryptoHandshakeMessage& message) {
-  QuicCryptoClientStreamBase::OnHandshakeMessage(message);
-
-  if (message.tag() == kSCUP) {
-    if (!handshake_confirmed()) {
-      CloseConnectionWithDetails(QUIC_CRYPTO_UPDATE_BEFORE_HANDSHAKE_COMPLETE,
-                                 "Early SCUP disallowed");
-      return;
-    }
-
-    // |message| is an update from the server, so we treat it differently from a
-    // handshake message.
-    HandleServerConfigUpdateMessage(message);
-    num_scup_messages_received_++;
-    return;
-  }
-
-  // Do not process handshake messages after the handshake is confirmed.
-  if (handshake_confirmed()) {
-    CloseConnectionWithDetails(QUIC_CRYPTO_MESSAGE_AFTER_HANDSHAKE_COMPLETE,
-                               "Unexpected handshake message");
-    return;
-  }
-
-  DoHandshakeLoop(&message);
-}
-
-void QuicCryptoClientStream::CryptoConnect() {
-  next_state_ = STATE_INITIALIZE;
-  DoHandshakeLoop(nullptr);
-}
-
-int QuicCryptoClientStream::num_sent_client_hellos() const {
-  return num_client_hellos_;
-}
-
-int QuicCryptoClientStream::num_scup_messages_received() const {
-  return num_scup_messages_received_;
-}
-
-// Used in Chromium, but not in the server.
-bool QuicCryptoClientStream::WasChannelIDSent() const {
-  return channel_id_sent_;
-}
-
-bool QuicCryptoClientStream::WasChannelIDSourceCallbackRun() const {
-  return channel_id_source_callback_run_;
-}
-
-void QuicCryptoClientStream::HandleServerConfigUpdateMessage(
-    const CryptoHandshakeMessage& server_config_update) {
-  DCHECK(server_config_update.tag() == kSCUP);
-  string error_details;
-  QuicCryptoClientConfig::CachedState* cached =
-      crypto_config_->LookupOrCreate(server_id_);
-  QuicErrorCode error = crypto_config_->ProcessServerConfigUpdate(
-      server_config_update, session()->connection()->clock()->WallNow(),
-      session()->connection()->version(), cached->chlo_hash(), cached,
-      &crypto_negotiated_params_, &error_details);
-
-  if (error != QUIC_NO_ERROR) {
-    CloseConnectionWithDetails(
-        error, "Server config update invalid: " + error_details);
-    return;
-  }
-
-  DCHECK(handshake_confirmed());
-  if (proof_verify_callback_) {
-    proof_verify_callback_->Cancel();
-  }
-  next_state_ = STATE_INITIALIZE_SCUP;
-  DoHandshakeLoop(nullptr);
-}
-
-void QuicCryptoClientStream::DoHandshakeLoop(const CryptoHandshakeMessage* in) {
-  QuicCryptoClientConfig::CachedState* cached =
-      crypto_config_->LookupOrCreate(server_id_);
-
-  QuicAsyncStatus rv = QUIC_SUCCESS;
-  do {
-    CHECK_NE(STATE_NONE, next_state_);
-    const State state = next_state_;
-    next_state_ = STATE_IDLE;
-    rv = QUIC_SUCCESS;
-    switch (state) {
-      case STATE_INITIALIZE:
-        DoInitialize(cached);
-        break;
-      case STATE_SEND_CHLO:
-        DoSendCHLO(cached);
-        return;  // return waiting to hear from server.
-      case STATE_RECV_REJ:
-        DoReceiveREJ(in, cached);
-        break;
-      case STATE_VERIFY_PROOF:
-        rv = DoVerifyProof(cached);
-        break;
-      case STATE_VERIFY_PROOF_COMPLETE:
-        DoVerifyProofComplete(cached);
-        break;
-      case STATE_GET_CHANNEL_ID:
-        rv = DoGetChannelID(cached);
-        break;
-      case STATE_GET_CHANNEL_ID_COMPLETE:
-        DoGetChannelIDComplete();
-        break;
-      case STATE_RECV_SHLO:
-        DoReceiveSHLO(in, cached);
-        break;
-      case STATE_IDLE:
-        // This means that the peer sent us a message that we weren't expecting.
-        CloseConnectionWithDetails(QUIC_INVALID_CRYPTO_MESSAGE_TYPE,
-                                   "Handshake in idle state");
-        return;
-      case STATE_INITIALIZE_SCUP:
-        DoInitializeServerConfigUpdate(cached);
-        break;
-      case STATE_NONE:
-        NOTREACHED();
-        return;  // We are done.
-    }
-  } while (rv != QUIC_PENDING && next_state_ != STATE_NONE);
-}
-
-void QuicCryptoClientStream::DoInitialize(
-    QuicCryptoClientConfig::CachedState* cached) {
-  if (!cached->IsEmpty() && !cached->signature().empty()) {
-    // Note that we verify the proof even if the cached proof is valid.
-    // This allows us to respond to CA trust changes or certificate
-    // expiration because it may have been a while since we last verified
-    // the proof.
-    DCHECK(crypto_config_->proof_verifier());
-    // Track proof verification time when cached server config is used.
-    proof_verify_start_time_ = base::TimeTicks::Now();
-    chlo_hash_ = cached->chlo_hash();
-    // If the cached state needs to be verified, do it now.
-    next_state_ = STATE_VERIFY_PROOF;
-  } else {
-    next_state_ = STATE_GET_CHANNEL_ID;
-  }
-}
-
-void QuicCryptoClientStream::DoSendCHLO(
-    QuicCryptoClientConfig::CachedState* cached) {
-  if (stateless_reject_received_) {
-    // If we've gotten to this point, we've sent at least one hello
-    // and received a stateless reject in response.  We cannot
-    // continue to send hellos because the server has abandoned state
-    // for this connection.  Abandon further handshakes.
-    next_state_ = STATE_NONE;
-    if (session()->connection()->connected()) {
-      session()->connection()->CloseConnection(
-          QUIC_CRYPTO_HANDSHAKE_STATELESS_REJECT, "stateless reject received",
-          ConnectionCloseBehavior::SILENT_CLOSE);
-    }
-    return;
-  }
-
-  // Send the client hello in plaintext.
-  session()->connection()->SetDefaultEncryptionLevel(ENCRYPTION_NONE);
-  encryption_established_ = false;
-  if (num_client_hellos_ > kMaxClientHellos) {
-    CloseConnectionWithDetails(
-        QUIC_CRYPTO_TOO_MANY_REJECTS,
-        base::StringPrintf("More than %u rejects", kMaxClientHellos).c_str());
-    return;
-  }
-  num_client_hellos_++;
-
-  CryptoHandshakeMessage out;
-  DCHECK(session() != nullptr);
-  DCHECK(session()->config() != nullptr);
-  // Send all the options, regardless of whether we're sending an
-  // inchoate or subsequent hello.
-  session()->config()->ToHandshakeMessage(&out);
-
-  // This call and function should be removed when
-  // FLAGS_quic_deprecate_kfixd is removed.
-  AppendFixed(&out);
-
-  // Send a local timestamp to the server.
-  out.SetValue(kCTIM,
-               session()->connection()->clock()->WallNow().ToUNIXSeconds());
-
-  if (!cached->IsComplete(session()->connection()->clock()->WallNow())) {
-    crypto_config_->FillInchoateClientHello(
-        server_id_, session()->connection()->supported_versions().front(),
-        cached, session()->connection()->random_generator(),
-        /* demand_x509_proof= */ true, &crypto_negotiated_params_, &out);
-    // Pad the inchoate client hello to fill up a packet.
-    const QuicByteCount kFramingOverhead = 50;  // A rough estimate.
-    const QuicByteCount max_packet_size =
-        session()->connection()->max_packet_length();
-    if (max_packet_size <= kFramingOverhead) {
-      DLOG(DFATAL) << "max_packet_length (" << max_packet_size
-                   << ") has no room for framing overhead.";
-      CloseConnectionWithDetails(QUIC_INTERNAL_ERROR,
-                                 "max_packet_size too smalll");
-      return;
-    }
-    if (kClientHelloMinimumSize > max_packet_size - kFramingOverhead) {
-      DLOG(DFATAL) << "Client hello won't fit in a single packet.";
-      CloseConnectionWithDetails(QUIC_INTERNAL_ERROR, "CHLO too large");
-      return;
-    }
-    out.set_minimum_size(
-        static_cast<size_t>(max_packet_size - kFramingOverhead));
-    next_state_ = STATE_RECV_REJ;
-    CryptoUtils::HashHandshakeMessage(out, &chlo_hash_);
-    SendHandshakeMessage(out);
-    return;
-  }
-
-  // If the server nonce is empty, copy over the server nonce from a previous
-  // SREJ, if there is one.
-  if (FLAGS_enable_quic_stateless_reject_support &&
-      crypto_negotiated_params_.server_nonce.empty() &&
-      cached->has_server_nonce()) {
-    crypto_negotiated_params_.server_nonce = cached->GetNextServerNonce();
-    DCHECK(!crypto_negotiated_params_.server_nonce.empty());
-  }
-
-  string error_details;
-  QuicErrorCode error = crypto_config_->FillClientHello(
-      server_id_, session()->connection()->connection_id(),
-      session()->connection()->version(),
-      session()->connection()->supported_versions().front(), cached,
-      session()->connection()->clock()->WallNow(),
-      session()->connection()->random_generator(), channel_id_key_.get(),
-      &crypto_negotiated_params_, &out, &error_details);
-  if (error != QUIC_NO_ERROR) {
-    // Flush the cached config so that, if it's bad, the server has a
-    // chance to send us another in the future.
-    cached->InvalidateServerConfig();
-    CloseConnectionWithDetails(error, error_details);
-    return;
-  }
-  CryptoUtils::HashHandshakeMessage(out, &chlo_hash_);
-  channel_id_sent_ = (channel_id_key_.get() != nullptr);
-  if (cached->proof_verify_details()) {
-    proof_handler_->OnProofVerifyDetailsAvailable(
-        *cached->proof_verify_details());
-  }
-  next_state_ = STATE_RECV_SHLO;
-  SendHandshakeMessage(out);
-  // Be prepared to decrypt with the new server write key.
-  session()->connection()->SetAlternativeDecrypter(
-      ENCRYPTION_INITIAL,
-      crypto_negotiated_params_.initial_crypters.decrypter.release(),
-      true /* latch once used */);
-  // Send subsequent packets under encryption on the assumption that the
-  // server will accept the handshake.
-  session()->connection()->SetEncrypter(
-      ENCRYPTION_INITIAL,
-      crypto_negotiated_params_.initial_crypters.encrypter.release());
-  session()->connection()->SetDefaultEncryptionLevel(ENCRYPTION_INITIAL);
-
-  // TODO(ianswett): Merge ENCRYPTION_REESTABLISHED and
-  // ENCRYPTION_FIRST_ESTABLSIHED
-  encryption_established_ = true;
-  session()->OnCryptoHandshakeEvent(QuicSession::ENCRYPTION_REESTABLISHED);
-}
-
-void QuicCryptoClientStream::DoReceiveREJ(
-    const CryptoHandshakeMessage* in,
-    QuicCryptoClientConfig::CachedState* cached) {
-  // We sent a dummy CHLO because we didn't have enough information to
-  // perform a handshake, or we sent a full hello that the server
-  // rejected. Here we hope to have a REJ that contains the information
-  // that we need.
-  if ((in->tag() != kREJ) && (in->tag() != kSREJ)) {
-    next_state_ = STATE_NONE;
-    CloseConnectionWithDetails(QUIC_INVALID_CRYPTO_MESSAGE_TYPE,
-                               "Expected REJ");
-    return;
-  }
-
-  const uint32_t* reject_reasons;
-  size_t num_reject_reasons;
-  static_assert(sizeof(QuicTag) == sizeof(uint32_t), "header out of sync");
-  if (in->GetTaglist(kRREJ, &reject_reasons, &num_reject_reasons) ==
-      QUIC_NO_ERROR) {
-    uint32_t packed_error = 0;
-    for (size_t i = 0; i < num_reject_reasons; ++i) {
-      // HANDSHAKE_OK is 0 and don't report that as error.
-      if (reject_reasons[i] == HANDSHAKE_OK || reject_reasons[i] >= 32) {
-        continue;
-      }
-      HandshakeFailureReason reason =
-          static_cast<HandshakeFailureReason>(reject_reasons[i]);
-      packed_error |= 1 << (reason - 1);
-    }
-    DVLOG(1) << "Reasons for rejection: " << packed_error;
-    if (num_client_hellos_ == kMaxClientHellos) {
-      UMA_HISTOGRAM_SPARSE_SLOWLY("Net.QuicClientHelloRejectReasons.TooMany",
-                                  packed_error);
-    }
-    UMA_HISTOGRAM_SPARSE_SLOWLY("Net.QuicClientHelloRejectReasons.Secure",
-                                packed_error);
-  }
-
-  stateless_reject_received_ = in->tag() == kSREJ;
-  string error_details;
-  QuicErrorCode error = crypto_config_->ProcessRejection(
-      *in, session()->connection()->clock()->WallNow(),
-      session()->connection()->version(), chlo_hash_, cached,
-      &crypto_negotiated_params_, &error_details);
-
-  if (error != QUIC_NO_ERROR) {
-    next_state_ = STATE_NONE;
-    CloseConnectionWithDetails(error, error_details);
-    return;
-  }
-  if (!cached->proof_valid()) {
-    if (!cached->signature().empty()) {
-      // Note that we only verify the proof if the cached proof is not
-      // valid. If the cached proof is valid here, someone else must have
-      // just added the server config to the cache and verified the proof,
-      // so we can assume no CA trust changes or certificate expiration
-      // has happened since then.
-      next_state_ = STATE_VERIFY_PROOF;
-      return;
-    }
-  }
-  next_state_ = STATE_GET_CHANNEL_ID;
-}
-
-QuicAsyncStatus QuicCryptoClientStream::DoVerifyProof(
-    QuicCryptoClientConfig::CachedState* cached) {
-  ProofVerifier* verifier = crypto_config_->proof_verifier();
-  DCHECK(verifier);
-  next_state_ = STATE_VERIFY_PROOF_COMPLETE;
-  generation_counter_ = cached->generation_counter();
-
-  ProofVerifierCallbackImpl* proof_verify_callback =
-      new ProofVerifierCallbackImpl(this);
-
-  verify_ok_ = false;
-
-  QuicAsyncStatus status = verifier->VerifyProof(
-      server_id_.host(), server_id_.port(), cached->server_config(),
-      session()->connection()->version(), chlo_hash_, cached->certs(),
-      cached->cert_sct(), cached->signature(), verify_context_.get(),
-      &verify_error_details_, &verify_details_,
-      std::unique_ptr<ProofVerifierCallback>(proof_verify_callback));
-
-  switch (status) {
-    case QUIC_PENDING:
-      proof_verify_callback_ = proof_verify_callback;
-      DVLOG(1) << "Doing VerifyProof";
-      break;
-    case QUIC_FAILURE:
-      break;
-    case QUIC_SUCCESS:
-      verify_ok_ = true;
-      break;
-  }
-  return status;
-}
-
-void QuicCryptoClientStream::DoVerifyProofComplete(
-    QuicCryptoClientConfig::CachedState* cached) {
-  if (!proof_verify_start_time_.is_null()) {
-    UMA_HISTOGRAM_TIMES("Net.QuicSession.VerifyProofTime.CachedServerConfig",
-                        base::TimeTicks::Now() - proof_verify_start_time_);
-  }
-  if (!verify_ok_) {
-    if (verify_details_.get()) {
-      proof_handler_->OnProofVerifyDetailsAvailable(*verify_details_);
-    }
-    if (num_client_hellos_ == 0) {
-      cached->Clear();
-      next_state_ = STATE_INITIALIZE;
-      return;
-    }
-    next_state_ = STATE_NONE;
-    UMA_HISTOGRAM_BOOLEAN("Net.QuicVerifyProofFailed.HandshakeConfirmed",
-                          handshake_confirmed());
-    CloseConnectionWithDetails(QUIC_PROOF_INVALID,
-                               "Proof invalid: " + verify_error_details_);
-    return;
-  }
-
-  // Check if generation_counter has changed between STATE_VERIFY_PROOF and
-  // STATE_VERIFY_PROOF_COMPLETE state changes.
-  if (generation_counter_ != cached->generation_counter()) {
-    next_state_ = STATE_VERIFY_PROOF;
-  } else {
-    SetCachedProofValid(cached);
-    cached->SetProofVerifyDetails(verify_details_.release());
-    if (!handshake_confirmed()) {
-      next_state_ = STATE_GET_CHANNEL_ID;
-    } else {
-      // TODO: Enable Expect-Staple. https://crbug.com/631101
-      next_state_ = STATE_NONE;
-    }
-  }
-}
-
-QuicAsyncStatus QuicCryptoClientStream::DoGetChannelID(
-    QuicCryptoClientConfig::CachedState* cached) {
-  next_state_ = STATE_GET_CHANNEL_ID_COMPLETE;
-  channel_id_key_.reset();
-  if (!RequiresChannelID(cached)) {
-    next_state_ = STATE_SEND_CHLO;
-    return QUIC_SUCCESS;
-  }
-
-  ChannelIDSourceCallbackImpl* channel_id_source_callback =
-      new ChannelIDSourceCallbackImpl(this);
-  QuicAsyncStatus status = crypto_config_->channel_id_source()->GetChannelIDKey(
-      server_id_.host(), &channel_id_key_, channel_id_source_callback);
-
-  switch (status) {
-    case QUIC_PENDING:
-      channel_id_source_callback_ = channel_id_source_callback;
-      DVLOG(1) << "Looking up channel ID";
-      break;
-    case QUIC_FAILURE:
-      next_state_ = STATE_NONE;
-      delete channel_id_source_callback;
-      CloseConnectionWithDetails(QUIC_INVALID_CHANNEL_ID_SIGNATURE,
-                                 "Channel ID lookup failed");
-      break;
-    case QUIC_SUCCESS:
-      delete channel_id_source_callback;
-      break;
-  }
-  return status;
-}
-
-void QuicCryptoClientStream::DoGetChannelIDComplete() {
-  if (!channel_id_key_.get()) {
-    next_state_ = STATE_NONE;
-    CloseConnectionWithDetails(QUIC_INVALID_CHANNEL_ID_SIGNATURE,
-                               "Channel ID lookup failed");
-    return;
-  }
-  next_state_ = STATE_SEND_CHLO;
-}
-
-void QuicCryptoClientStream::DoReceiveSHLO(
-    const CryptoHandshakeMessage* in,
-    QuicCryptoClientConfig::CachedState* cached) {
-  next_state_ = STATE_NONE;
-  // We sent a CHLO that we expected to be accepted and now we're
-  // hoping for a SHLO from the server to confirm that.  First check
-  // to see whether the response was a reject, and if so, move on to
-  // the reject-processing state.
-  if ((in->tag() == kREJ) || (in->tag() == kSREJ)) {
-    // alternative_decrypter will be nullptr if the original alternative
-    // decrypter latched and became the primary decrypter. That happens
-    // if we received a message encrypted with the INITIAL key.
-    if (session()->connection()->alternative_decrypter() == nullptr) {
-      // The rejection was sent encrypted!
-      CloseConnectionWithDetails(QUIC_CRYPTO_ENCRYPTION_LEVEL_INCORRECT,
-                                 "encrypted REJ message");
-      return;
-    }
-    next_state_ = STATE_RECV_REJ;
-    return;
-  }
-
-  if (in->tag() != kSHLO) {
-    CloseConnectionWithDetails(QUIC_INVALID_CRYPTO_MESSAGE_TYPE,
-                               "Expected SHLO or REJ");
-    return;
-  }
-
-  // alternative_decrypter will be nullptr if the original alternative
-  // decrypter latched and became the primary decrypter. That happens
-  // if we received a message encrypted with the INITIAL key.
-  if (session()->connection()->alternative_decrypter() != nullptr) {
-    // The server hello was sent without encryption.
-    CloseConnectionWithDetails(QUIC_CRYPTO_ENCRYPTION_LEVEL_INCORRECT,
-                               "unencrypted SHLO message");
-    return;
-  }
-
-  string error_details;
-  QuicErrorCode error = crypto_config_->ProcessServerHello(
-      *in, session()->connection()->connection_id(),
-      session()->connection()->version(),
-      session()->connection()->server_supported_versions(), cached,
-      &crypto_negotiated_params_, &error_details);
-
-  if (error != QUIC_NO_ERROR) {
-    CloseConnectionWithDetails(error, "Server hello invalid: " + error_details);
-    return;
-  }
-  error = session()->config()->ProcessPeerHello(*in, SERVER, &error_details);
-  if (error != QUIC_NO_ERROR) {
-    CloseConnectionWithDetails(error, "Server hello invalid: " + error_details);
-    return;
-  }
-  session()->OnConfigNegotiated();
-
-  CrypterPair* crypters = &crypto_negotiated_params_.forward_secure_crypters;
-  // TODO(agl): we don't currently latch this decrypter because the idea
-  // has been floated that the server shouldn't send packets encrypted
-  // with the FORWARD_SECURE key until it receives a FORWARD_SECURE
-  // packet from the client.
-  session()->connection()->SetAlternativeDecrypter(
-      ENCRYPTION_FORWARD_SECURE, crypters->decrypter.release(),
-      false /* don't latch */);
-  session()->connection()->SetEncrypter(ENCRYPTION_FORWARD_SECURE,
-                                        crypters->encrypter.release());
-  session()->connection()->SetDefaultEncryptionLevel(ENCRYPTION_FORWARD_SECURE);
-
-  handshake_confirmed_ = true;
-  session()->OnCryptoHandshakeEvent(QuicSession::HANDSHAKE_CONFIRMED);
-  session()->connection()->OnHandshakeComplete();
-}
-
-void QuicCryptoClientStream::DoInitializeServerConfigUpdate(
-    QuicCryptoClientConfig::CachedState* cached) {
-  bool update_ignored = false;
-  if (!cached->IsEmpty() && !cached->signature().empty()) {
-    // Note that we verify the proof even if the cached proof is valid.
-    DCHECK(crypto_config_->proof_verifier());
-    next_state_ = STATE_VERIFY_PROOF;
-  } else {
-    update_ignored = true;
-    next_state_ = STATE_NONE;
-  }
-  UMA_HISTOGRAM_COUNTS("Net.QuicNumServerConfig.UpdateMessagesIgnored",
-                       update_ignored);
-}
-
-void QuicCryptoClientStream::SetCachedProofValid(
-    QuicCryptoClientConfig::CachedState* cached) {
-  cached->SetProofValid();
-  proof_handler_->OnProofValid(*cached);
-}
-
-bool QuicCryptoClientStream::RequiresChannelID(
-    QuicCryptoClientConfig::CachedState* cached) {
-  if (server_id_.privacy_mode() == PRIVACY_MODE_ENABLED ||
-      !crypto_config_->channel_id_source()) {
-    return false;
-  }
-  const CryptoHandshakeMessage* scfg = cached->GetServerConfig();
-  if (!scfg) {  // scfg may be null then we send an inchoate CHLO.
-    return false;
-  }
-  const QuicTag* their_proof_demands;
-  size_t num_their_proof_demands;
-  if (scfg->GetTaglist(kPDMD, &their_proof_demands, &num_their_proof_demands) !=
-      QUIC_NO_ERROR) {
-    return false;
-  }
-  for (size_t i = 0; i < num_their_proof_demands; i++) {
-    if (their_proof_demands[i] == kCHID) {
-      return true;
-    }
-  }
-  return false;
-}
-
-}  // namespace net