caps/nsNullPrincipal.cpp
author Mike Hommey <mh+mozilla@glandium.org>
Tue, 22 Mar 2016 14:03:26 +0900
changeset 289943 aa4bcd9eadcb994886c14fd96d53aabeffe3f31c
parent 274177 0e4c4db3b90ff45937cc1eab4b7bbd61f4674326
child 295145 6b8afcb75d337366a6dd6d163adee7cc8385e66c
permissions -rw-r--r--
Bug 1258618 - Serialize substs/configs and defines bools as '1' or '' in config.status. r=nalexander This allows to use True and False as values given to set_config/set_define in moz.configure files, while postponing having to deal with the long tail of things depending on the values from substs and defines. Ideally, everything would handle the bools just fine, but there are too many things involved to deal with this right now: scripts using buildconfig.{substs,defines}, scripts using ConfigEnvironment (e.g. process_define_files.py), ConfigEnvironment itself, etc.

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set sw=2 sts=2 ts=2 et tw=80: */
/* 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/. */

/**
 * 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.
 */

#include "mozilla/ArrayUtils.h"

#include "nsNullPrincipal.h"
#include "nsNullPrincipalURI.h"
#include "nsMemory.h"
#include "nsIURIWithPrincipal.h"
#include "nsIClassInfoImpl.h"
#include "nsNetCID.h"
#include "nsError.h"
#include "nsIScriptSecurityManager.h"
#include "nsPrincipal.h"
#include "nsScriptSecurityManager.h"
#include "pratom.h"

using namespace mozilla;

NS_IMPL_CLASSINFO(nsNullPrincipal, nullptr, nsIClassInfo::MAIN_THREAD_ONLY,
                  NS_NULLPRINCIPAL_CID)
NS_IMPL_QUERY_INTERFACE_CI(nsNullPrincipal,
                           nsIPrincipal,
                           nsISerializable)
NS_IMPL_CI_INTERFACE_GETTER(nsNullPrincipal,
                            nsIPrincipal,
                            nsISerializable)

/* static */ already_AddRefed<nsNullPrincipal>
nsNullPrincipal::CreateWithInheritedAttributes(nsIPrincipal* aInheritFrom)
{
  RefPtr<nsNullPrincipal> nullPrin = new nsNullPrincipal();
  nsresult rv = nullPrin->Init(Cast(aInheritFrom)->OriginAttributesRef());
  return NS_SUCCEEDED(rv) ? nullPrin.forget() : nullptr;
}

/* static */ already_AddRefed<nsNullPrincipal>
nsNullPrincipal::Create(const PrincipalOriginAttributes& aOriginAttributes)
{
  RefPtr<nsNullPrincipal> nullPrin = new nsNullPrincipal();
  nsresult rv = nullPrin->Init(aOriginAttributes);
  NS_ENSURE_SUCCESS(rv, nullptr);

  return nullPrin.forget();
}

nsresult
nsNullPrincipal::Init(const PrincipalOriginAttributes& aOriginAttributes)
{
  mOriginAttributes = aOriginAttributes;

  mURI = nsNullPrincipalURI::Create();
  NS_ENSURE_TRUE(mURI, NS_ERROR_NOT_AVAILABLE);

  return NS_OK;
}

void
nsNullPrincipal::GetScriptLocation(nsACString &aStr)
{
  mURI->GetSpec(aStr);
}

/**
 * nsIPrincipal implementation
 */

NS_IMETHODIMP
nsNullPrincipal::GetHashValue(uint32_t *aResult)
{
  *aResult = (NS_PTR_TO_INT32(this) >> 2);
  return NS_OK;
}

NS_IMETHODIMP
nsNullPrincipal::GetURI(nsIURI** aURI)
{
  return NS_EnsureSafeToReturn(mURI, aURI);
}

NS_IMETHODIMP
nsNullPrincipal::GetDomain(nsIURI** aDomain)
{
  return NS_EnsureSafeToReturn(mURI, aDomain);
}

NS_IMETHODIMP
nsNullPrincipal::SetDomain(nsIURI* aDomain)
{
  // I think the right thing to do here is to just throw...  Silently failing
  // seems counterproductive.
  return NS_ERROR_NOT_AVAILABLE;
}

nsresult
nsNullPrincipal::GetOriginInternal(nsACString& aOrigin)
{
  return mURI->GetSpec(aOrigin);
}

bool
nsNullPrincipal::MayLoadInternal(nsIURI* aURI)
{
  // Also allow the load if we are the principal of the URI being checked.
  nsCOMPtr<nsIURIWithPrincipal> uriPrinc = do_QueryInterface(aURI);
  if (uriPrinc) {
    nsCOMPtr<nsIPrincipal> principal;
    uriPrinc->GetPrincipal(getter_AddRefs(principal));

    if (principal == this) {
      return true;
    }
  }

  return false;
}

NS_IMETHODIMP
nsNullPrincipal::GetBaseDomain(nsACString& aBaseDomain)
{
  // For a null principal, we use our unique uuid as the base domain.
  return mURI->GetPath(aBaseDomain);
}

/**
 * nsISerializable implementation
 */
NS_IMETHODIMP
nsNullPrincipal::Read(nsIObjectInputStream* aStream)
{
  // Note - nsNullPrincipal use NS_GENERIC_FACTORY_CONSTRUCTOR_INIT, which means
  // that the Init() method has already been invoked by the time we deserialize.
  // This is in contrast to nsPrincipal, which uses NS_GENERIC_FACTORY_CONSTRUCTOR,
  // in which case ::Read needs to invoke Init().
  nsAutoCString suffix;
  nsresult rv = aStream->ReadCString(suffix);
  NS_ENSURE_SUCCESS(rv, rv);

  bool ok = mOriginAttributes.PopulateFromSuffix(suffix);
  NS_ENSURE_TRUE(ok, NS_ERROR_FAILURE);

  return NS_OK;
}

NS_IMETHODIMP
nsNullPrincipal::Write(nsIObjectOutputStream* aStream)
{
  nsAutoCString suffix;
  OriginAttributesRef().CreateSuffix(suffix);

  nsresult rv = aStream->WriteStringZ(suffix.get());
  NS_ENSURE_SUCCESS(rv, rv);

  return NS_OK;
}