Refactor client cert private key handling.

net/ssl/openssl_client_key_store.h

-// Copyright (c) 2013 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.
-
-#ifndef NET_SSL_OPENSSL_CLIENT_KEY_STORE_H_
-#define NET_SSL_OPENSSL_CLIENT_KEY_STORE_H_
-
-#include <map>
-#include <string>
-
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/singleton.h"
-#include "net/base/net_export.h"
-#include "third_party/boringssl/src/include/openssl/base.h"
-
-namespace net {
-
-class SSLPrivateKey;
-class X509Certificate;
-
-// OpenSSLClientKeyStore implements an in-memory store for client
-// certificate private keys, because the platforms where OpenSSL is
-// used do not provide a way to retrieve the private key of a known
-// certificate.
-//
-// This class is not thread-safe and should only be used from the network
-// thread.
-class NET_EXPORT OpenSSLClientKeyStore {
- public:
-  // Platforms must define this factory function as appropriate.
-  static OpenSSLClientKeyStore* GetInstance();
-
-  // Record the association between a certificate and its
-  // private key. This method should be called _before_
-  // FetchClientCertPrivateKey to ensure that the private key is returned
-  // when it is called later. The association is recorded in memory
-  // exclusively.
-  // |cert| is a handle to a certificate object.
-  // |private_key| is an SSLPrivateKey that corresponds to the certificate's
-  // private key.
-  // Returns false if an error occured.
-  bool RecordClientCertPrivateKey(const X509Certificate* cert,
-                                  scoped_refptr<SSLPrivateKey> key);
-
-  // Given a certificate's |public_key|, return the corresponding private
-  // key that has been recorded previously by RecordClientCertPrivateKey().
-  // |cert| is a client certificate.
-  // Returns its matching private key on success, NULL otherwise.
-  scoped_refptr<SSLPrivateKey> FetchClientCertPrivateKey(
-      const X509Certificate* cert);
-
-  // Flush all recorded keys.
-  void Flush();
-
- private:
-  OpenSSLClientKeyStore();
-  ~OpenSSLClientKeyStore();
-
-  // Maps from the serialized SubjectPublicKeyInfo structure to the
-  // corresponding private key.
-  std::map<std::string, scoped_refptr<net::SSLPrivateKey>> key_map_;
-
-  friend struct base::DefaultSingletonTraits<OpenSSLClientKeyStore>;
-
-  DISALLOW_COPY_AND_ASSIGN(OpenSSLClientKeyStore);
-};
-
-}  // namespace net
-
-#endif  // NET_SSL_OPENSSL_CLIENT_KEY_STORE_H_