Renaming _openssl files to _impl

net/socket/ssl_server_socket_openssl.cc

Index: net/socket/ssl_server_socket_openssl.cc
diff --git a/net/socket/ssl_server_socket_openssl.cc b/net/socket/ssl_server_socket_openssl.cc
deleted file mode 100644
index d931c5c361fd5823f3c73cb79cab2cfbe2310438..0000000000000000000000000000000000000000
--- a/net/socket/ssl_server_socket_openssl.cc
+++ /dev/null
@@ -1,957 +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/socket/ssl_server_socket_openssl.h"
-
-#include <openssl/err.h>
-#include <openssl/ssl.h>
-#include <utility>
-
-#include "base/callback_helpers.h"
-#include "base/logging.h"
-#include "base/strings/string_util.h"
-#include "crypto/openssl_util.h"
-#include "crypto/rsa_private_key.h"
-#include "crypto/scoped_openssl_types.h"
-#include "net/base/net_errors.h"
-#include "net/cert/cert_verify_result.h"
-#include "net/cert/client_cert_verifier.h"
-#include "net/cert/x509_util_openssl.h"
-#include "net/ssl/openssl_ssl_util.h"
-#include "net/ssl/ssl_connection_status_flags.h"
-#include "net/ssl/ssl_info.h"
-
-#define GotoState(s) next_handshake_state_ = s
-
-namespace net {
-
-namespace {
-
-// Creates an X509Certificate out of the concatenation of |cert|, if non-null,
-// with |chain|.
-scoped_refptr<X509Certificate> CreateX509Certificate(X509* cert,
-                                                     STACK_OF(X509) * chain) {
-  std::vector<base::StringPiece> der_chain;
-  base::StringPiece der_cert;
-  scoped_refptr<X509Certificate> client_cert;
-  if (cert) {
-    if (!x509_util::GetDER(cert, &der_cert))
-      return nullptr;
-    der_chain.push_back(der_cert);
-  }
-
-  for (size_t i = 0; i < sk_X509_num(chain); ++i) {
-    X509* x = sk_X509_value(chain, i);
-    if (!x509_util::GetDER(x, &der_cert))
-      return nullptr;
-    der_chain.push_back(der_cert);
-  }
-
-  return X509Certificate::CreateFromDERCertChain(der_chain);
-}
-
-class SSLServerSocketOpenSSL : public SSLServerSocket {
- public:
-  // See comments on CreateSSLServerSocket for details of how these
-  // parameters are used.
-  SSLServerSocketOpenSSL(std::unique_ptr<StreamSocket> socket, SSL* ssl);
-  ~SSLServerSocketOpenSSL() override;
-
-  // SSLServerSocket interface.
-  int Handshake(const CompletionCallback& callback) override;
-
-  // SSLSocket interface.
-  int ExportKeyingMaterial(const base::StringPiece& label,
-                           bool has_context,
-                           const base::StringPiece& context,
-                           unsigned char* out,
-                           unsigned int outlen) override;
-
-  // Socket interface (via StreamSocket).
-  int Read(IOBuffer* buf,
-           int buf_len,
-           const CompletionCallback& callback) override;
-  int Write(IOBuffer* buf,
-            int buf_len,
-            const CompletionCallback& callback) override;
-  int SetReceiveBufferSize(int32_t size) override;
-  int SetSendBufferSize(int32_t size) override;
-
-  // StreamSocket implementation.
-  int Connect(const CompletionCallback& callback) override;
-  void Disconnect() override;
-  bool IsConnected() const override;
-  bool IsConnectedAndIdle() const override;
-  int GetPeerAddress(IPEndPoint* address) const override;
-  int GetLocalAddress(IPEndPoint* address) const override;
-  const BoundNetLog& NetLog() const override;
-  void SetSubresourceSpeculation() override;
-  void SetOmniboxSpeculation() override;
-  bool WasEverUsed() const override;
-  bool WasNpnNegotiated() const override;
-  NextProto GetNegotiatedProtocol() const override;
-  bool GetSSLInfo(SSLInfo* ssl_info) override;
-  void GetConnectionAttempts(ConnectionAttempts* out) const override;
-  void ClearConnectionAttempts() override {}
-  void AddConnectionAttempts(const ConnectionAttempts& attempts) override {}
-  int64_t GetTotalReceivedBytes() const override;
-  static int CertVerifyCallback(X509_STORE_CTX* store_ctx, void* arg);
-
- private:
-  enum State {
-    STATE_NONE,
-    STATE_HANDSHAKE,
-  };
-
-  void OnSendComplete(int result);
-  void OnRecvComplete(int result);
-  void OnHandshakeIOComplete(int result);
-
-  int BufferSend();
-  void BufferSendComplete(int result);
-  void TransportWriteComplete(int result);
-  int BufferRecv();
-  void BufferRecvComplete(int result);
-  int TransportReadComplete(int result);
-  bool DoTransportIO();
-  int DoPayloadRead();
-  int DoPayloadWrite();
-
-  int DoHandshakeLoop(int last_io_result);
-  int DoReadLoop(int result);
-  int DoWriteLoop(int result);
-  int DoHandshake();
-  void DoHandshakeCallback(int result);
-  void DoReadCallback(int result);
-  void DoWriteCallback(int result);
-
-  int Init();
-  void ExtractClientCert();
-
-  // Members used to send and receive buffer.
-  bool transport_send_busy_;
-  bool transport_recv_busy_;
-  bool transport_recv_eof_;
-
-  scoped_refptr<DrainableIOBuffer> send_buffer_;
-  scoped_refptr<IOBuffer> recv_buffer_;
-
-  BoundNetLog net_log_;
-
-  CompletionCallback user_handshake_callback_;
-  CompletionCallback user_read_callback_;
-  CompletionCallback user_write_callback_;
-
-  // Used by Read function.
-  scoped_refptr<IOBuffer> user_read_buf_;
-  int user_read_buf_len_;
-
-  // Used by Write function.
-  scoped_refptr<IOBuffer> user_write_buf_;
-  int user_write_buf_len_;
-
-  // Used by TransportWriteComplete() and TransportReadComplete() to signify an
-  // error writing to the transport socket. A value of OK indicates no error.
-  int transport_write_error_;
-
-  // OpenSSL stuff
-  SSL* ssl_;
-  BIO* transport_bio_;
-
-  // StreamSocket for sending and receiving data.
-  std::unique_ptr<StreamSocket> transport_socket_;
-
-  // Certificate for the client.
-  scoped_refptr<X509Certificate> client_cert_;
-
-  State next_handshake_state_;
-  bool completed_handshake_;
-
-  DISALLOW_COPY_AND_ASSIGN(SSLServerSocketOpenSSL);
-};
-
-SSLServerSocketOpenSSL::SSLServerSocketOpenSSL(
-    std::unique_ptr<StreamSocket> transport_socket,
-    SSL* ssl)
-    : transport_send_busy_(false),
-      transport_recv_busy_(false),
-      transport_recv_eof_(false),
-      user_read_buf_len_(0),
-      user_write_buf_len_(0),
-      transport_write_error_(OK),
-      ssl_(ssl),
-      transport_bio_(NULL),
-      transport_socket_(std::move(transport_socket)),
-      next_handshake_state_(STATE_NONE),
-      completed_handshake_(false) {}
-
-SSLServerSocketOpenSSL::~SSLServerSocketOpenSSL() {
-  if (ssl_) {
-    // Calling SSL_shutdown prevents the session from being marked as
-    // unresumable.
-    SSL_shutdown(ssl_);
-    SSL_free(ssl_);
-    ssl_ = NULL;
-  }
-  if (transport_bio_) {
-    BIO_free_all(transport_bio_);
-    transport_bio_ = NULL;
-  }
-}
-
-int SSLServerSocketOpenSSL::Handshake(const CompletionCallback& callback) {
-  net_log_.BeginEvent(NetLog::TYPE_SSL_SERVER_HANDSHAKE);
-
-  // Set up new ssl object.
-  int rv = Init();
-  if (rv != OK) {
-    LOG(ERROR) << "Failed to initialize OpenSSL: rv=" << rv;
-    net_log_.EndEventWithNetErrorCode(NetLog::TYPE_SSL_SERVER_HANDSHAKE, rv);
-    return rv;
-  }
-
-  // Set SSL to server mode. Handshake happens in the loop below.
-  SSL_set_accept_state(ssl_);
-
-  GotoState(STATE_HANDSHAKE);
-  rv = DoHandshakeLoop(OK);
-  if (rv == ERR_IO_PENDING) {
-    user_handshake_callback_ = callback;
-  } else {
-    net_log_.EndEventWithNetErrorCode(NetLog::TYPE_SSL_SERVER_HANDSHAKE, rv);
-  }
-
-  return rv > OK ? OK : rv;
-}
-
-int SSLServerSocketOpenSSL::ExportKeyingMaterial(
-    const base::StringPiece& label,
-    bool has_context,
-    const base::StringPiece& context,
-    unsigned char* out,
-    unsigned int outlen) {
-  if (!IsConnected())
-    return ERR_SOCKET_NOT_CONNECTED;
-
-  crypto::OpenSSLErrStackTracer err_tracer(FROM_HERE);
-
-  int rv = SSL_export_keying_material(
-      ssl_, out, outlen, label.data(), label.size(),
-      reinterpret_cast<const unsigned char*>(context.data()),
-      context.length(), context.length() > 0);
-
-  if (rv != 1) {
-    int ssl_error = SSL_get_error(ssl_, rv);
-    LOG(ERROR) << "Failed to export keying material;"
-               << " returned " << rv
-               << ", SSL error code " << ssl_error;
-    return MapOpenSSLError(ssl_error, err_tracer);
-  }
-  return OK;
-}
-
-int SSLServerSocketOpenSSL::Read(IOBuffer* buf,
-                                 int buf_len,
-                                 const CompletionCallback& callback) {
-  DCHECK(user_read_callback_.is_null());
-  DCHECK(user_handshake_callback_.is_null());
-  DCHECK(!user_read_buf_);
-  DCHECK(!callback.is_null());
-
-  user_read_buf_ = buf;
-  user_read_buf_len_ = buf_len;
-
-  DCHECK(completed_handshake_);
-
-  int rv = DoReadLoop(OK);
-
-  if (rv == ERR_IO_PENDING) {
-    user_read_callback_ = callback;
-  } else {
-    user_read_buf_ = NULL;
-    user_read_buf_len_ = 0;
-  }
-
-  return rv;
-}
-
-int SSLServerSocketOpenSSL::Write(IOBuffer* buf,
-                                  int buf_len,
-                                  const CompletionCallback& callback) {
-  DCHECK(user_write_callback_.is_null());
-  DCHECK(!user_write_buf_);
-  DCHECK(!callback.is_null());
-
-  user_write_buf_ = buf;
-  user_write_buf_len_ = buf_len;
-
-  int rv = DoWriteLoop(OK);
-
-  if (rv == ERR_IO_PENDING) {
-    user_write_callback_ = callback;
-  } else {
-    user_write_buf_ = NULL;
-    user_write_buf_len_ = 0;
-  }
-  return rv;
-}
-
-int SSLServerSocketOpenSSL::SetReceiveBufferSize(int32_t size) {
-  return transport_socket_->SetReceiveBufferSize(size);
-}
-
-int SSLServerSocketOpenSSL::SetSendBufferSize(int32_t size) {
-  return transport_socket_->SetSendBufferSize(size);
-}
-
-int SSLServerSocketOpenSSL::Connect(const CompletionCallback& callback) {
-  NOTIMPLEMENTED();
-  return ERR_NOT_IMPLEMENTED;
-}
-
-void SSLServerSocketOpenSSL::Disconnect() {
-  transport_socket_->Disconnect();
-}
-
-bool SSLServerSocketOpenSSL::IsConnected() const {
-  // TODO(wtc): Find out if we should check transport_socket_->IsConnected()
-  // as well.
-  return completed_handshake_;
-}
-
-bool SSLServerSocketOpenSSL::IsConnectedAndIdle() const {
-  return completed_handshake_ && transport_socket_->IsConnectedAndIdle();
-}
-
-int SSLServerSocketOpenSSL::GetPeerAddress(IPEndPoint* address) const {
-  if (!IsConnected())
-    return ERR_SOCKET_NOT_CONNECTED;
-  return transport_socket_->GetPeerAddress(address);
-}
-
-int SSLServerSocketOpenSSL::GetLocalAddress(IPEndPoint* address) const {
-  if (!IsConnected())
-    return ERR_SOCKET_NOT_CONNECTED;
-  return transport_socket_->GetLocalAddress(address);
-}
-
-const BoundNetLog& SSLServerSocketOpenSSL::NetLog() const {
-  return net_log_;
-}
-
-void SSLServerSocketOpenSSL::SetSubresourceSpeculation() {
-  transport_socket_->SetSubresourceSpeculation();
-}
-
-void SSLServerSocketOpenSSL::SetOmniboxSpeculation() {
-  transport_socket_->SetOmniboxSpeculation();
-}
-
-bool SSLServerSocketOpenSSL::WasEverUsed() const {
-  return transport_socket_->WasEverUsed();
-}
-
-bool SSLServerSocketOpenSSL::WasNpnNegotiated() const {
-  NOTIMPLEMENTED();
-  return false;
-}
-
-NextProto SSLServerSocketOpenSSL::GetNegotiatedProtocol() const {
-  // NPN is not supported by this class.
-  return kProtoUnknown;
-}
-
-bool SSLServerSocketOpenSSL::GetSSLInfo(SSLInfo* ssl_info) {
-  ssl_info->Reset();
-  if (!completed_handshake_)
-    return false;
-
-  ssl_info->cert = client_cert_;
-
-  const SSL_CIPHER* cipher = SSL_get_current_cipher(ssl_);
-  CHECK(cipher);
-  ssl_info->security_bits = SSL_CIPHER_get_bits(cipher, NULL);
-
-  SSLConnectionStatusSetCipherSuite(
-      static_cast<uint16_t>(SSL_CIPHER_get_id(cipher)),
-      &ssl_info->connection_status);
-  SSLConnectionStatusSetVersion(GetNetSSLVersion(ssl_),
-                                &ssl_info->connection_status);
-
-  if (!SSL_get_secure_renegotiation_support(ssl_))
-    ssl_info->connection_status |= SSL_CONNECTION_NO_RENEGOTIATION_EXTENSION;
-
-  ssl_info->handshake_type = SSL_session_reused(ssl_)
-                                 ? SSLInfo::HANDSHAKE_RESUME
-                                 : SSLInfo::HANDSHAKE_FULL;
-
-  return true;
-}
-
-void SSLServerSocketOpenSSL::GetConnectionAttempts(
-    ConnectionAttempts* out) const {
-  out->clear();
-}
-
-int64_t SSLServerSocketOpenSSL::GetTotalReceivedBytes() const {
-  return transport_socket_->GetTotalReceivedBytes();
-}
-
-void SSLServerSocketOpenSSL::OnSendComplete(int result) {
-  if (next_handshake_state_ == STATE_HANDSHAKE) {
-    // In handshake phase.
-    OnHandshakeIOComplete(result);
-    return;
-  }
-
-  // TODO(byungchul): This state machine is not correct. Copy the state machine
-  // of SSLClientSocketOpenSSL::OnSendComplete() which handles it better.
-  if (!completed_handshake_)
-    return;
-
-  if (user_write_buf_) {
-    int rv = DoWriteLoop(result);
-    if (rv != ERR_IO_PENDING)
-      DoWriteCallback(rv);
-  } else {
-    // Ensure that any queued ciphertext is flushed.
-    DoTransportIO();
-  }
-}
-
-void SSLServerSocketOpenSSL::OnRecvComplete(int result) {
-  if (next_handshake_state_ == STATE_HANDSHAKE) {
-    // In handshake phase.
-    OnHandshakeIOComplete(result);
-    return;
-  }
-
-  // Network layer received some data, check if client requested to read
-  // decrypted data.
-  if (!user_read_buf_ || !completed_handshake_)
-    return;
-
-  int rv = DoReadLoop(result);
-  if (rv != ERR_IO_PENDING)
-    DoReadCallback(rv);
-}
-
-void SSLServerSocketOpenSSL::OnHandshakeIOComplete(int result) {
-  int rv = DoHandshakeLoop(result);
-  if (rv == ERR_IO_PENDING)
-    return;
-
-  net_log_.EndEventWithNetErrorCode(NetLog::TYPE_SSL_SERVER_HANDSHAKE, rv);
-  if (!user_handshake_callback_.is_null())
-    DoHandshakeCallback(rv);
-}
-
-// Return 0 for EOF,
-// > 0 for bytes transferred immediately,
-// < 0 for error (or the non-error ERR_IO_PENDING).
-int SSLServerSocketOpenSSL::BufferSend() {
-  if (transport_send_busy_)
-    return ERR_IO_PENDING;
-
-  if (!send_buffer_) {
-    // Get a fresh send buffer out of the send BIO.
-    size_t max_read = BIO_pending(transport_bio_);
-    if (!max_read)
-      return 0;  // Nothing pending in the OpenSSL write BIO.
-    send_buffer_ = new DrainableIOBuffer(new IOBuffer(max_read), max_read);
-    int read_bytes = BIO_read(transport_bio_, send_buffer_->data(), max_read);
-    DCHECK_GT(read_bytes, 0);
-    CHECK_EQ(static_cast<int>(max_read), read_bytes);
-  }
-
-  int rv = transport_socket_->Write(
-      send_buffer_.get(), send_buffer_->BytesRemaining(),
-      base::Bind(&SSLServerSocketOpenSSL::BufferSendComplete,
-                 base::Unretained(this)));
-  if (rv == ERR_IO_PENDING) {
-    transport_send_busy_ = true;
-  } else {
-    TransportWriteComplete(rv);
-  }
-  return rv;
-}
-
-void SSLServerSocketOpenSSL::BufferSendComplete(int result) {
-  transport_send_busy_ = false;
-  TransportWriteComplete(result);
-  OnSendComplete(result);
-}
-
-void SSLServerSocketOpenSSL::TransportWriteComplete(int result) {
-  DCHECK(ERR_IO_PENDING != result);
-  if (result < 0) {
-    // Got a socket write error; close the BIO to indicate this upward.
-    //
-    // TODO(davidben): The value of |result| gets lost. Feed the error back into
-    // the BIO so it gets (re-)detected in OnSendComplete. Perhaps with
-    // BIO_set_callback.
-    DVLOG(1) << "TransportWriteComplete error " << result;
-    (void)BIO_shutdown_wr(SSL_get_wbio(ssl_));
-
-    // Match the fix for http://crbug.com/249848 in NSS by erroring future reads
-    // from the socket after a write error.
-    //
-    // TODO(davidben): Avoid having read and write ends interact this way.
-    transport_write_error_ = result;
-    (void)BIO_shutdown_wr(transport_bio_);
-    send_buffer_ = NULL;
-  } else {
-    DCHECK(send_buffer_);
-    send_buffer_->DidConsume(result);
-    DCHECK_GE(send_buffer_->BytesRemaining(), 0);
-    if (send_buffer_->BytesRemaining() <= 0)
-      send_buffer_ = NULL;
-  }
-}
-
-int SSLServerSocketOpenSSL::BufferRecv() {
-  if (transport_recv_busy_)
-    return ERR_IO_PENDING;
-
-  // Determine how much was requested from |transport_bio_| that was not
-  // actually available.
-  size_t requested = BIO_ctrl_get_read_request(transport_bio_);
-  if (requested == 0) {
-    // This is not a perfect match of error codes, as no operation is
-    // actually pending. However, returning 0 would be interpreted as
-    // a possible sign of EOF, which is also an inappropriate match.
-    return ERR_IO_PENDING;
-  }
-
-  // Known Issue: While only reading |requested| data is the more correct
-  // implementation, it has the downside of resulting in frequent reads:
-  // One read for the SSL record header (~5 bytes) and one read for the SSL
-  // record body. Rather than issuing these reads to the underlying socket
-  // (and constantly allocating new IOBuffers), a single Read() request to
-  // fill |transport_bio_| is issued. As long as an SSL client socket cannot
-  // be gracefully shutdown (via SSL close alerts) and re-used for non-SSL
-  // traffic, this over-subscribed Read()ing will not cause issues.
-  size_t max_write = BIO_ctrl_get_write_guarantee(transport_bio_);
-  if (!max_write)
-    return ERR_IO_PENDING;
-
-  recv_buffer_ = new IOBuffer(max_write);
-  int rv = transport_socket_->Read(
-      recv_buffer_.get(), max_write,
-      base::Bind(&SSLServerSocketOpenSSL::BufferRecvComplete,
-                 base::Unretained(this)));
-  if (rv == ERR_IO_PENDING) {
-    transport_recv_busy_ = true;
-  } else {
-    rv = TransportReadComplete(rv);
-  }
-  return rv;
-}
-
-void SSLServerSocketOpenSSL::BufferRecvComplete(int result) {
-  result = TransportReadComplete(result);
-  OnRecvComplete(result);
-}
-
-int SSLServerSocketOpenSSL::TransportReadComplete(int result) {
-  DCHECK(ERR_IO_PENDING != result);
-  if (result <= 0) {
-    DVLOG(1) << "TransportReadComplete result " << result;
-    // Received 0 (end of file) or an error. Either way, bubble it up to the
-    // SSL layer via the BIO. TODO(joth): consider stashing the error code, to
-    // relay up to the SSL socket client (i.e. via DoReadCallback).
-    if (result == 0)
-      transport_recv_eof_ = true;
-    (void)BIO_shutdown_wr(transport_bio_);
-  } else if (transport_write_error_ < 0) {
-    // Mirror transport write errors as read failures; transport_bio_ has been
-    // shut down by TransportWriteComplete, so the BIO_write will fail, failing
-    // the CHECK. http://crbug.com/335557.
-    result = transport_write_error_;
-  } else {
-    DCHECK(recv_buffer_);
-    int ret = BIO_write(transport_bio_, recv_buffer_->data(), result);
-    // A write into a memory BIO should always succeed.
-    DCHECK_EQ(result, ret);
-  }
-  recv_buffer_ = NULL;
-  transport_recv_busy_ = false;
-  return result;
-}
-
-// Do as much network I/O as possible between the buffer and the
-// transport socket. Return true if some I/O performed, false
-// otherwise (error or ERR_IO_PENDING).
-bool SSLServerSocketOpenSSL::DoTransportIO() {
-  bool network_moved = false;
-  int rv;
-  // Read and write as much data as possible. The loop is necessary because
-  // Write() may return synchronously.
-  do {
-    rv = BufferSend();
-    if (rv != ERR_IO_PENDING && rv != 0)
-      network_moved = true;
-  } while (rv > 0);
-  if (!transport_recv_eof_ && BufferRecv() != ERR_IO_PENDING)
-    network_moved = true;
-  return network_moved;
-}
-
-int SSLServerSocketOpenSSL::DoPayloadRead() {
-  DCHECK(user_read_buf_);
-  DCHECK_GT(user_read_buf_len_, 0);
-  crypto::OpenSSLErrStackTracer err_tracer(FROM_HERE);
-  int rv = SSL_read(ssl_, user_read_buf_->data(), user_read_buf_len_);
-  if (rv >= 0)
-    return rv;
-  int ssl_error = SSL_get_error(ssl_, rv);
-  OpenSSLErrorInfo error_info;
-  int net_error = MapOpenSSLErrorWithDetails(ssl_error, err_tracer,
-                                             &error_info);
-  if (net_error != ERR_IO_PENDING) {
-    net_log_.AddEvent(
-        NetLog::TYPE_SSL_READ_ERROR,
-        CreateNetLogOpenSSLErrorCallback(net_error, ssl_error, error_info));
-  }
-  return net_error;
-}
-
-int SSLServerSocketOpenSSL::DoPayloadWrite() {
-  DCHECK(user_write_buf_);
-  crypto::OpenSSLErrStackTracer err_tracer(FROM_HERE);
-  int rv = SSL_write(ssl_, user_write_buf_->data(), user_write_buf_len_);
-  if (rv >= 0)
-    return rv;
-  int ssl_error = SSL_get_error(ssl_, rv);
-  OpenSSLErrorInfo error_info;
-  int net_error = MapOpenSSLErrorWithDetails(ssl_error, err_tracer,
-                                             &error_info);
-  if (net_error != ERR_IO_PENDING) {
-    net_log_.AddEvent(
-        NetLog::TYPE_SSL_WRITE_ERROR,
-        CreateNetLogOpenSSLErrorCallback(net_error, ssl_error, error_info));
-  }
-  return net_error;
-}
-
-int SSLServerSocketOpenSSL::DoHandshakeLoop(int last_io_result) {
-  int rv = last_io_result;
-  do {
-    // Default to STATE_NONE for next state.
-    // (This is a quirk carried over from the windows
-    // implementation.  It makes reading the logs a bit harder.)
-    // State handlers can and often do call GotoState just
-    // to stay in the current state.
-    State state = next_handshake_state_;
-    GotoState(STATE_NONE);
-    switch (state) {
-      case STATE_HANDSHAKE:
-        rv = DoHandshake();
-        break;
-      case STATE_NONE:
-      default:
-        rv = ERR_UNEXPECTED;
-        LOG(DFATAL) << "unexpected state " << state;
-        break;
-    }
-
-    // Do the actual network I/O
-    bool network_moved = DoTransportIO();
-    if (network_moved && next_handshake_state_ == STATE_HANDSHAKE) {
-      // In general we exit the loop if rv is ERR_IO_PENDING.  In this
-      // special case we keep looping even if rv is ERR_IO_PENDING because
-      // the transport IO may allow DoHandshake to make progress.
-      rv = OK;  // This causes us to stay in the loop.
-    }
-  } while (rv != ERR_IO_PENDING && next_handshake_state_ != STATE_NONE);
-  return rv;
-}
-
-int SSLServerSocketOpenSSL::DoReadLoop(int result) {
-  DCHECK(completed_handshake_);
-  DCHECK(next_handshake_state_ == STATE_NONE);
-
-  if (result < 0)
-    return result;
-
-  bool network_moved;
-  int rv;
-  do {
-    rv = DoPayloadRead();
-    network_moved = DoTransportIO();
-  } while (rv == ERR_IO_PENDING && network_moved);
-  return rv;
-}
-
-int SSLServerSocketOpenSSL::DoWriteLoop(int result) {
-  DCHECK(completed_handshake_);
-  DCHECK_EQ(next_handshake_state_, STATE_NONE);
-
-  if (result < 0)
-    return result;
-
-  bool network_moved;
-  int rv;
-  do {
-    rv = DoPayloadWrite();
-    network_moved = DoTransportIO();
-  } while (rv == ERR_IO_PENDING && network_moved);
-  return rv;
-}
-
-int SSLServerSocketOpenSSL::DoHandshake() {
-  crypto::OpenSSLErrStackTracer err_tracer(FROM_HERE);
-  int net_error = OK;
-  int rv = SSL_do_handshake(ssl_);
-
-  if (rv == 1) {
-    completed_handshake_ = true;
-    // The results of SSL_get_peer_certificate() must be explicitly freed.
-    ScopedX509 cert(SSL_get_peer_certificate(ssl_));
-    if (cert) {
-      // The caller does not take ownership of SSL_get_peer_cert_chain's
-      // results.
-      STACK_OF(X509)* chain = SSL_get_peer_cert_chain(ssl_);
-      client_cert_ = CreateX509Certificate(cert.get(), chain);
-      if (!client_cert_.get())
-        return ERR_SSL_CLIENT_AUTH_CERT_BAD_FORMAT;
-    }
-  } else {
-    int ssl_error = SSL_get_error(ssl_, rv);
-    OpenSSLErrorInfo error_info;
-    net_error = MapOpenSSLErrorWithDetails(ssl_error, err_tracer, &error_info);
-
-    // This hack is necessary because the mapping of SSL error codes to
-    // net_errors assumes (correctly for client sockets, but erroneously for
-    // server sockets) that peer cert verification failure can only occur if
-    // the cert changed during a renego. crbug.com/570351
-    if (net_error == ERR_SSL_SERVER_CERT_CHANGED)
-      net_error = ERR_BAD_SSL_CLIENT_AUTH_CERT;
-
-    // If not done, stay in this state
-    if (net_error == ERR_IO_PENDING) {
-      GotoState(STATE_HANDSHAKE);
-    } else {
-      LOG(ERROR) << "handshake failed; returned " << rv
-                 << ", SSL error code " << ssl_error
-                 << ", net_error " << net_error;
-      net_log_.AddEvent(
-          NetLog::TYPE_SSL_HANDSHAKE_ERROR,
-          CreateNetLogOpenSSLErrorCallback(net_error, ssl_error, error_info));
-    }
-  }
-  return net_error;
-}
-
-void SSLServerSocketOpenSSL::DoHandshakeCallback(int rv) {
-  DCHECK_NE(rv, ERR_IO_PENDING);
-  base::ResetAndReturn(&user_handshake_callback_).Run(rv > OK ? OK : rv);
-}
-
-void SSLServerSocketOpenSSL::DoReadCallback(int rv) {
-  DCHECK(rv != ERR_IO_PENDING);
-  DCHECK(!user_read_callback_.is_null());
-
-  user_read_buf_ = NULL;
-  user_read_buf_len_ = 0;
-  base::ResetAndReturn(&user_read_callback_).Run(rv);
-}
-
-void SSLServerSocketOpenSSL::DoWriteCallback(int rv) {
-  DCHECK(rv != ERR_IO_PENDING);
-  DCHECK(!user_write_callback_.is_null());
-
-  user_write_buf_ = NULL;
-  user_write_buf_len_ = 0;
-  base::ResetAndReturn(&user_write_callback_).Run(rv);
-}
-
-int SSLServerSocketOpenSSL::Init() {
-  DCHECK(!transport_bio_);
-
-  crypto::OpenSSLErrStackTracer err_tracer(FROM_HERE);
-
-  if (!ssl_)
-    return ERR_UNEXPECTED;
-
-  BIO* ssl_bio = NULL;
-  // 0 => use default buffer sizes.
-  if (!BIO_new_bio_pair(&ssl_bio, 0, &transport_bio_, 0))
-    return ERR_UNEXPECTED;
-  DCHECK(ssl_bio);
-  DCHECK(transport_bio_);
-
-  SSL_set_bio(ssl_, ssl_bio, ssl_bio);
-
-  return OK;
-}
-
-// static
-int SSLServerSocketOpenSSL::CertVerifyCallback(X509_STORE_CTX* store_ctx,
-                                               void* arg) {
-  ClientCertVerifier* verifier = reinterpret_cast<ClientCertVerifier*>(arg);
-  // If a verifier was not supplied, all certificates are accepted.
-  if (!verifier)
-    return 1;
-  STACK_OF(X509)* chain = store_ctx->untrusted;
-  scoped_refptr<X509Certificate> client_cert(
-      CreateX509Certificate(nullptr, chain));
-  if (!client_cert.get()) {
-    X509_STORE_CTX_set_error(store_ctx, X509_V_ERR_CERT_REJECTED);
-    return 0;
-  }
-  // Asynchronous completion of Verify is currently not supported.
-  // http://crbug.com/347402
-  // The API for Verify supports the parts needed for async completion
-  // but is currently expected to complete synchronously.
-  std::unique_ptr<ClientCertVerifier::Request> ignore_async;
-  int res =
-      verifier->Verify(client_cert.get(), CompletionCallback(), &ignore_async);
-  DCHECK_NE(res, ERR_IO_PENDING);
-
-  if (res != OK) {
-    X509_STORE_CTX_set_error(store_ctx, X509_V_ERR_CERT_REJECTED);
-    return 0;
-  }
-  return 1;
-}
-
-}  // namespace
-
-std::unique_ptr<SSLServerContext> CreateSSLServerContext(
-    X509Certificate* certificate,
-    const crypto::RSAPrivateKey& key,
-    const SSLServerConfig& ssl_server_config) {
-  return std::unique_ptr<SSLServerContext>(
-      new SSLServerContextOpenSSL(certificate, key, ssl_server_config));
-}
-
-SSLServerContextOpenSSL::SSLServerContextOpenSSL(
-    X509Certificate* certificate,
-    const crypto::RSAPrivateKey& key,
-    const SSLServerConfig& ssl_server_config)
-    : ssl_server_config_(ssl_server_config),
-      cert_(certificate),
-      key_(key.Copy()) {
-  CHECK(key_);
-  crypto::EnsureOpenSSLInit();
-  ssl_ctx_.reset(SSL_CTX_new(TLS_method()));
-  SSL_CTX_set_session_cache_mode(ssl_ctx_.get(), SSL_SESS_CACHE_SERVER);
-  uint8_t session_ctx_id = 0;
-  SSL_CTX_set_session_id_context(ssl_ctx_.get(), &session_ctx_id,
-                                 sizeof(session_ctx_id));
-
-  int verify_mode = 0;
-  switch (ssl_server_config_.client_cert_type) {
-    case SSLServerConfig::ClientCertType::REQUIRE_CLIENT_CERT:
-      verify_mode |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
-    // Fall-through
-    case SSLServerConfig::ClientCertType::OPTIONAL_CLIENT_CERT:
-      verify_mode |= SSL_VERIFY_PEER;
-      SSL_CTX_set_verify(ssl_ctx_.get(), verify_mode, nullptr);
-      SSL_CTX_set_cert_verify_callback(
-          ssl_ctx_.get(), SSLServerSocketOpenSSL::CertVerifyCallback,
-          ssl_server_config_.client_cert_verifier);
-      break;
-    case SSLServerConfig::ClientCertType::NO_CLIENT_CERT:
-      break;
-  }
-
-  // Set certificate and private key.
-  DCHECK(cert_->os_cert_handle());
-#if defined(USE_OPENSSL_CERTS)
-  CHECK(SSL_CTX_use_certificate(ssl_ctx_.get(), cert_->os_cert_handle()));
-#else
-  // Convert OSCertHandle to X509 structure.
-  std::string der_string;
-  CHECK(X509Certificate::GetDEREncoded(cert_->os_cert_handle(), &der_string));
-
-  const unsigned char* der_string_array =
-      reinterpret_cast<const unsigned char*>(der_string.data());
-
-  ScopedX509 x509(d2i_X509(NULL, &der_string_array, der_string.length()));
-  CHECK(x509);
-
-  // On success, SSL_CTX_use_certificate acquires a reference to |x509|.
-  CHECK(SSL_CTX_use_certificate(ssl_ctx_.get(), x509.get()));
-#endif  // USE_OPENSSL_CERTS
-
-  DCHECK(key_->key());
-  CHECK(SSL_CTX_use_PrivateKey(ssl_ctx_.get(), key_->key()));
-
-  DCHECK_LT(SSL3_VERSION, ssl_server_config_.version_min);
-  DCHECK_LT(SSL3_VERSION, ssl_server_config_.version_max);
-  SSL_CTX_set_min_version(ssl_ctx_.get(), ssl_server_config_.version_min);
-  SSL_CTX_set_max_version(ssl_ctx_.get(), ssl_server_config_.version_max);
-
-  // OpenSSL defaults some options to on, others to off. To avoid ambiguity,
-  // set everything we care about to an absolute value.
-  SslSetClearMask options;
-  options.ConfigureFlag(SSL_OP_NO_COMPRESSION, true);
-
-  SSL_CTX_set_options(ssl_ctx_.get(), options.set_mask);
-  SSL_CTX_clear_options(ssl_ctx_.get(), options.clear_mask);
-
-  // Same as above, this time for the SSL mode.
-  SslSetClearMask mode;
-
-  mode.ConfigureFlag(SSL_MODE_RELEASE_BUFFERS, true);
-
-  SSL_CTX_set_mode(ssl_ctx_.get(), mode.set_mask);
-  SSL_CTX_clear_mode(ssl_ctx_.get(), mode.clear_mask);
-
-  // See SSLServerConfig::disabled_cipher_suites for description of the suites
-  // disabled by default. Note that !SHA256 and !SHA384 only remove HMAC-SHA256
-  // and HMAC-SHA384 cipher suites, not GCM cipher suites with SHA256 or SHA384
-  // as the handshake hash.
-  std::string command("DEFAULT:!SHA256:!SHA384:!AESGCM+AES256:!aPSK");
-
-  if (ssl_server_config_.require_ecdhe)
-    command.append(":!kRSA:!kDHE");
-
-  // Remove any disabled ciphers.
-  for (uint16_t id : ssl_server_config_.disabled_cipher_suites) {
-    const SSL_CIPHER* cipher = SSL_get_cipher_by_value(id);
-    if (cipher) {
-      command.append(":!");
-      command.append(SSL_CIPHER_get_name(cipher));
-    }
-  }
-
-  int rv = SSL_CTX_set_cipher_list(ssl_ctx_.get(), command.c_str());
-  // If this fails (rv = 0) it means there are no ciphers enabled on this SSL.
-  // This will almost certainly result in the socket failing to complete the
-  // handshake at which point the appropriate error is bubbled up to the client.
-  LOG_IF(WARNING, rv != 1) << "SSL_set_cipher_list('" << command
-                           << "') returned " << rv;
-
-  if (ssl_server_config_.client_cert_type !=
-          SSLServerConfig::ClientCertType::NO_CLIENT_CERT &&
-      !ssl_server_config_.cert_authorities_.empty()) {
-    ScopedX509NameStack stack(sk_X509_NAME_new_null());
-    for (const auto& authority : ssl_server_config_.cert_authorities_) {
-      const uint8_t* name = reinterpret_cast<const uint8_t*>(authority.c_str());
-      const uint8_t* name_start = name;
-      ScopedX509_NAME subj(d2i_X509_NAME(nullptr, &name, authority.length()));
-      CHECK(subj && name == name_start + authority.length());
-      sk_X509_NAME_push(stack.get(), subj.release());
-    }
-    SSL_CTX_set_client_CA_list(ssl_ctx_.get(), stack.release());
-  }
-}
-
-SSLServerContextOpenSSL::~SSLServerContextOpenSSL() {}
-
-std::unique_ptr<SSLServerSocket> SSLServerContextOpenSSL::CreateSSLServerSocket(
-    std::unique_ptr<StreamSocket> socket) {
-  SSL* ssl = SSL_new(ssl_ctx_.get());
-  return std::unique_ptr<SSLServerSocket>(
-      new SSLServerSocketOpenSSL(std::move(socket), ssl));
-}
-
-void EnableSSLServerSockets() {
-  // No-op because CreateSSLServerSocket() calls crypto::EnsureOpenSSLInit().
-}
-
-}  // namespace net