author Mozilla Releng Treescript <>
Mon, 30 Mar 2020 09:14:12 +0000
changeset 580725 aae70d505c4e193448a8934ee952bfb6174cdff5
parent 567978 73820a049c644c3f3af58cece3bdb7cd0e4b2185
permissions -rw-r--r--
"No bug - tagging src with FIREFOX_RELEASE_75_BASE a=release DONTBUILD CLOSED TREE"

/* -*- 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 */

 * This is the principal that has no rights and can't be accessed by
 * anything other than itself and chrome; null principals are not
 * same-origin with anything but themselves.

#ifndef mozilla_NullPrincipal_h
#define mozilla_NullPrincipal_h

#include "nsIPrincipal.h"
#include "nsJSPrincipals.h"
#include "nsCOMPtr.h"

#include "mozilla/BasePrincipal.h"

class nsIDocShell;
class nsIURI;
namespace Json {
class Value;

#define NS_NULLPRINCIPAL_CID                         \
  {                                                  \
    0xbd066e5f, 0x146f, 0x4472, {                    \
      0x83, 0x31, 0x7b, 0xfd, 0x05, 0xb1, 0xed, 0x90 \
    }                                                \

#define NS_NULLPRINCIPAL_SCHEME "moz-nullprincipal"

namespace mozilla {

class NullPrincipal final : public BasePrincipal {
  // This should only be used by deserialization, and the factory constructor.
  // Other consumers should use the Create and CreateWithInheritedAttributes
  // methods.
  NullPrincipal() : BasePrincipal(eNullPrincipal) {}

  static PrincipalKind Kind() { return eNullPrincipal; }


  NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr) override;
  uint32_t GetHashValue() override;
  NS_IMETHOD GetURI(nsIURI** aURI) override;
  NS_IMETHOD GetIsOriginPotentiallyTrustworthy(bool* aResult) override;
  NS_IMETHOD GetDomain(nsIURI** aDomain) override;
  NS_IMETHOD SetDomain(nsIURI* aDomain) override;
  NS_IMETHOD GetBaseDomain(nsACString& aBaseDomain) override;
  NS_IMETHOD GetAddonId(nsAString& aAddonId) override;

  static already_AddRefed<NullPrincipal> CreateWithInheritedAttributes(
      nsIPrincipal* aInheritFrom);

  // Create NullPrincipal with origin attributes from docshell.
  // If aIsFirstParty is true, and the pref 'privacy.firstparty.isolate' is also
  // enabled, the mFirstPartyDomain value of the origin attributes will be set
  // to an unique value.
  static already_AddRefed<NullPrincipal> CreateWithInheritedAttributes(
      nsIDocShell* aDocShell, bool aIsFirstParty = false);
  static already_AddRefed<NullPrincipal> CreateWithInheritedAttributes(
      const OriginAttributes& aOriginAttributes, bool aIsFirstParty = false);

  static already_AddRefed<NullPrincipal> Create(
      const OriginAttributes& aOriginAttributes, nsIURI* aURI = nullptr);

  static already_AddRefed<NullPrincipal> CreateWithoutOriginAttributes();

  nsresult Init(const OriginAttributes& aOriginAttributes = OriginAttributes(),
                nsIURI* aURI = nullptr);

  virtual nsresult GetScriptLocation(nsACString& aStr) override;

  nsresult GetSiteIdentifier(SiteIdentifier& aSite) override {
    return NS_OK;

  virtual nsresult PopulateJSONObject(Json::Value& aObject) override;

  // Serializable keys are the valid enum fields the serialization supports
  enum SerializableKeys : uint8_t { eSpec = 0, eSuffix, eMax = eSuffix };
  typedef mozilla::BasePrincipal::KeyValT<SerializableKeys> KeyVal;

  static already_AddRefed<BasePrincipal> FromProperties(
      nsTArray<NullPrincipal::KeyVal>& aFields);

  virtual ~NullPrincipal() = default;

  bool SubsumesInternal(nsIPrincipal* aOther,
                        DocumentDomainConsideration aConsideration) override {
    return FastEquals(aOther);

  bool MayLoadInternal(nsIURI* aURI) override;

  nsCOMPtr<nsIURI> mURI;

  // If aIsFirstParty is true, this NullPrincipal will be initialized based on
  // the aOriginAttributes with FirstPartyDomain set to a unique value.
  // This value is generated from mURI.path, with ".mozilla" appended at the
  // end.
  void Init(const OriginAttributes& aOriginAttributes, bool aIsFirstParty);

}  // namespace mozilla

#endif  // mozilla_NullPrincipal_h