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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef __NSCLIENTAUTHREMEMBER_H__
#define __NSCLIENTAUTHREMEMBER_H__

#include "mozilla/HashFunctions.h"
#include "mozilla/Move.h"
#include "mozilla/ReentrantMonitor.h"
#include "nsTHashtable.h"
#include "nsIObserver.h"
#include "nsIX509Cert.h"
#include "nsNSSCertificate.h"
#include "nsString.h"
#include "nsWeakReference.h"
#include "mozilla/Attributes.h"

namespace mozilla {
class OriginAttributes;
}

using mozilla::OriginAttributes;

class nsClientAuthRemember {
 public:
  nsClientAuthRemember() {}

  nsClientAuthRemember(const nsClientAuthRemember& aOther) {
    this->operator=(aOther);
  }

  nsClientAuthRemember& operator=(const nsClientAuthRemember& aOther) {
    mAsciiHost = aOther.mAsciiHost;
    mFingerprint = aOther.mFingerprint;
    mDBKey = aOther.mDBKey;
    return *this;
  }

  nsCString mAsciiHost;
  nsCString mFingerprint;
  nsCString mDBKey;
};

// hash entry class
class nsClientAuthRememberEntry final : public PLDHashEntryHdr {
 public:
  // Hash methods
  typedef const char* KeyType;
  typedef const char* KeyTypePointer;

  // do nothing with aHost - we require mHead to be set before we're live!
  explicit nsClientAuthRememberEntry(KeyTypePointer aHostWithCertUTF8) {}

  nsClientAuthRememberEntry(nsClientAuthRememberEntry&& aToMove)
      : mSettings(mozilla::Move(aToMove.mSettings)),
        mEntryKey(mozilla::Move(aToMove.mEntryKey)) {}

  ~nsClientAuthRememberEntry() {}

  KeyType GetKey() const { return EntryKeyPtr(); }

  KeyTypePointer GetKeyPointer() const { return EntryKeyPtr(); }

  bool KeyEquals(KeyTypePointer aKey) const {
    return !strcmp(EntryKeyPtr(), aKey);
  }

  static KeyTypePointer KeyToPointer(KeyType aKey) { return aKey; }

  static PLDHashNumber HashKey(KeyTypePointer aKey) {
    return mozilla::HashString(aKey);
  }

  enum { ALLOW_MEMMOVE = false };

  // get methods
  inline const nsCString& GetEntryKey() const { return mEntryKey; }

  inline KeyTypePointer EntryKeyPtr() const { return mEntryKey.get(); }

  nsClientAuthRemember mSettings;
  nsCString mEntryKey;
};

class nsClientAuthRememberService final : public nsIObserver,
                                          public nsSupportsWeakReference {
 public:
  NS_DECL_THREADSAFE_ISUPPORTS
  NS_DECL_NSIOBSERVER

  nsClientAuthRememberService();

  nsresult Init();

  static void GetEntryKey(const nsACString& aHostName,
                          const OriginAttributes& aOriginAttributes,
                          const nsACString& aFingerprint,
                          /*out*/ nsACString& aEntryKey);

  nsresult RememberDecision(const nsACString& aHostName,
                            const OriginAttributes& aOriginAttributes,
                            CERTCertificate* aServerCert,
                            CERTCertificate* aClientCert);

  nsresult HasRememberedDecision(const nsACString& aHostName,
                                 const OriginAttributes& aOriginAttributes,
                                 CERTCertificate* aServerCert,
                                 nsACString& aCertDBKey, bool* aRetVal);

  void ClearRememberedDecisions();
  static void ClearAllRememberedDecisions();

 protected:
  ~nsClientAuthRememberService();

  mozilla::ReentrantMonitor monitor;
  nsTHashtable<nsClientAuthRememberEntry> mSettingsTable;

  void RemoveAllFromMemory();
  nsresult AddEntryToList(const nsACString& aHost,
                          const OriginAttributes& aOriginAttributes,
                          const nsACString& aServerFingerprint,
                          const nsACString& aDBKey);
};

#endif