// Copyright 2015 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_HTTP_HTTP_AUTH_PREFERENCES_H_
#define NET_HTTP_HTTP_AUTH_PREFERENCES_H_

#include <memory>
#include <set>
#include <string>
#include <vector>

#include "base/macros.h"
#include "build/build_config.h"
#include "net/base/net_export.h"
#include "url/gurl.h"

namespace net {

class URLSecurityManager;

// Manage the preferences needed for authentication, and provide a cache of
// them accessible from the IO thread.
class NET_EXPORT HttpAuthPreferences {
 public:
  // Simplified ctor with empty |auth_schemes|, empty |gssapi_library_name|, and
  // |allow_gssapi_library_load| set to true.
  HttpAuthPreferences();

#if defined(OS_POSIX) && !defined(OS_ANDROID)
  // Simplified ctor with empty |gssapi_library_name| and
  // |allow_gssapi_library_load| set to true.
  // On platforms where this is not available, the ctor below is already
  // equivalent to this.
  explicit HttpAuthPreferences(const std::vector<std::string>& auth_schemes);
#endif

  HttpAuthPreferences(const std::vector<std::string>& auth_schemes
#if defined(OS_CHROMEOS)
                      ,
                      bool allow_gssapi_library_load
#elif defined(OS_POSIX) && !defined(OS_ANDROID)
                      ,
                      const std::string& gssapi_library_name
#endif
                      );
  virtual ~HttpAuthPreferences();

  virtual bool IsSupportedScheme(const std::string& scheme) const;
  virtual bool NegotiateDisableCnameLookup() const;
  virtual bool NegotiateEnablePort() const;
#if defined(OS_POSIX)
  virtual bool NtlmV2Enabled() const;
#endif
#if defined(OS_ANDROID)
  virtual std::string AuthAndroidNegotiateAccountType() const;
#elif defined(OS_CHROMEOS)
  virtual bool AllowGssapiLibraryLoad() const;
#elif defined(OS_POSIX)
  virtual std::string GssapiLibraryName() const;
#endif
  virtual bool CanUseDefaultCredentials(const GURL& auth_origin) const;
  virtual bool CanDelegate(const GURL& auth_origin) const;

  void set_negotiate_disable_cname_lookup(bool negotiate_disable_cname_lookup) {
    negotiate_disable_cname_lookup_ = negotiate_disable_cname_lookup;
  }

  void set_negotiate_enable_port(bool negotiate_enable_port) {
    negotiate_enable_port_ = negotiate_enable_port;
  }

#if defined(OS_POSIX)
  void set_ntlm_v2_enabled(bool ntlm_v2_enabled) {
    ntlm_v2_enabled_ = ntlm_v2_enabled;
  }
#endif

  void SetServerWhitelist(const std::string& server_whitelist);

  void SetDelegateWhitelist(const std::string& delegate_whitelist);

#if defined(OS_ANDROID)
  void set_auth_android_negotiate_account_type(
      const std::string& account_type) {
    auth_android_negotiate_account_type_ = account_type;
  }
#endif

 private:
  // TODO(aberent) allow changes to auth scheme set after startup.
  // See https://crbug/549273.
  const std::set<std::string> auth_schemes_;
  bool negotiate_disable_cname_lookup_;
  bool negotiate_enable_port_;

#if defined(OS_POSIX)
  bool ntlm_v2_enabled_;
#endif

#if defined(OS_ANDROID)
  std::string auth_android_negotiate_account_type_;
#elif defined(OS_CHROMEOS)
  const bool allow_gssapi_library_load_;
#elif defined(OS_POSIX)
  // GSSAPI library name cannot change after startup, since changing it
  // requires unloading the existing GSSAPI library, which could cause all
  // sorts of problems for, for example, active Negotiate transactions.
  const std::string gssapi_library_name_;
#endif

  std::unique_ptr<URLSecurityManager> security_manager_;
  DISALLOW_COPY_AND_ASSIGN(HttpAuthPreferences);
};

}  // namespace net

#endif  // NET_HTTP_HTTP_AUTH_PREFERENCES_H_