caps/NullPrincipal.cpp
author Mike Hommey <mh+mozilla@glandium.org>
Thu, 20 Jul 2017 14:06:23 +0900
changeset 612007 499490d18b16ae716794ae027179cce6cb20147c
parent 560481 4ce695cd46dcba0f5ee7838cd24e978b6cea5afc
child 618204 87af56846608166575c27f7c0356e09c4527dc19
permissions -rw-r--r--
Bug 1382525 - Move LLVM_CONFIG out of mozconfig.common. r?chmanchester LLVM_CONFIG, per the contents of toolkit/moz.configure, is tied to --enable-stylo, but it currently is set on all types of builds. It currently happens to work, but it's actually not meant to, and sure enough, the fix for bug 1374727 exacerbates that. So we create a new mozconfig.stylo file that enables stylo and sets LLVM_CONFIG, such that only build types that do enable stylo have LLVM_CONFIG set.

/* -*- 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 "nsDocShell.h"
#include "NullPrincipal.h"
#include "NullPrincipalURI.h"
#include "nsMemory.h"
#include "nsIURIWithPrincipal.h"
#include "nsIClassInfoImpl.h"
#include "nsNetCID.h"
#include "nsError.h"
#include "nsIScriptSecurityManager.h"
#include "ContentPrincipal.h"
#include "nsScriptSecurityManager.h"
#include "pratom.h"

using namespace mozilla;

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

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

/* static */ already_AddRefed<NullPrincipal>
NullPrincipal::CreateWithInheritedAttributes(nsIDocShell* aDocShell, bool aIsFirstParty)
{
  OriginAttributes attrs = nsDocShell::Cast(aDocShell)->GetOriginAttributes();

  RefPtr<NullPrincipal> nullPrin = new NullPrincipal();
  nsresult rv = nullPrin->Init(attrs, aIsFirstParty);
  MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
  return nullPrin.forget();
}

/* static */ already_AddRefed<NullPrincipal>
NullPrincipal::Create(const OriginAttributes& aOriginAttributes, nsIURI* aURI)
{
  RefPtr<NullPrincipal> nullPrin = new NullPrincipal();
  nsresult rv = nullPrin->Init(aOriginAttributes, aURI);
  MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));

  return nullPrin.forget();
}

nsresult
NullPrincipal::Init(const OriginAttributes& aOriginAttributes, nsIURI* aURI)
{
  if (aURI) {
    nsAutoCString scheme;
    nsresult rv = aURI->GetScheme(scheme);
    NS_ENSURE_SUCCESS(rv, rv);

    NS_ENSURE_TRUE(scheme.EqualsLiteral(NS_NULLPRINCIPAL_SCHEME),
                   NS_ERROR_NOT_AVAILABLE);

    mURI = aURI;
  } else {
    mURI = NullPrincipalURI::Create();
    NS_ENSURE_TRUE(mURI, NS_ERROR_NOT_AVAILABLE);
  }

  nsAutoCString originNoSuffix;
  DebugOnly<nsresult> rv = mURI->GetSpec(originNoSuffix);
  MOZ_ASSERT(NS_SUCCEEDED(rv));

  FinishInit(originNoSuffix, aOriginAttributes);

  return NS_OK;
}

nsresult
NullPrincipal::Init(const OriginAttributes& aOriginAttributes, bool aIsFirstParty)
{
  mURI = NullPrincipalURI::Create();
  NS_ENSURE_TRUE(mURI, NS_ERROR_NOT_AVAILABLE);

  nsAutoCString originNoSuffix;
  DebugOnly<nsresult> rv = mURI->GetSpec(originNoSuffix);
  MOZ_ASSERT(NS_SUCCEEDED(rv));

  nsAutoCString path;
  rv = mURI->GetPath(path);
  MOZ_ASSERT(NS_SUCCEEDED(rv));

  OriginAttributes attrs(aOriginAttributes);
  if (aIsFirstParty) {
    // remove the '{}' characters from both ends.
    path.Mid(path, 1, path.Length() - 2);
    path.AppendLiteral(".mozilla");
    attrs.SetFirstPartyDomain(true, path);
  }

  FinishInit(originNoSuffix, attrs);

  return NS_OK;
}

nsresult
NullPrincipal::GetScriptLocation(nsACString &aStr)
{
  return mURI->GetSpec(aStr);
}

/**
 * nsIPrincipal implementation
 */

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

NS_IMETHODIMP
NullPrincipal::SetCsp(nsIContentSecurityPolicy* aCsp)
{
  // Never destroy an existing CSP on the principal.
  // This method should only be called in rare cases.

  MOZ_ASSERT(!mCSP, "do not destroy an existing CSP");
  if (mCSP) {
    return NS_ERROR_ALREADY_INITIALIZED;
  }

  mCSP = aCsp;
  return NS_OK;
}

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

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

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

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

NS_IMETHODIMP
NullPrincipal::GetAddonId(nsAString& aAddonId)
{
  aAddonId.Truncate();
  return NS_OK;
};

/**
 * nsISerializable implementation
 */
NS_IMETHODIMP
NullPrincipal::Read(nsIObjectInputStream* aStream)
{
  // Note - NullPrincipal 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 ContentPrincipal, which uses NS_GENERIC_FACTORY_CONSTRUCTOR,
  // in which case ::Read needs to invoke Init().

  nsAutoCString spec;
  nsresult rv = aStream->ReadCString(spec);
  NS_ENSURE_SUCCESS(rv, rv);

  nsCOMPtr<nsIURI> uri;
  rv = NS_NewURI(getter_AddRefs(uri), spec);
  NS_ENSURE_SUCCESS(rv, rv);

  nsAutoCString suffix;
  rv = aStream->ReadCString(suffix);
  NS_ENSURE_SUCCESS(rv, rv);

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

  return Init(attrs, uri);
}

NS_IMETHODIMP
NullPrincipal::Write(nsIObjectOutputStream* aStream)
{
  NS_ENSURE_STATE(mURI);

  nsAutoCString spec;
  nsresult rv = mURI->GetSpec(spec);
  NS_ENSURE_SUCCESS(rv, rv);

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

  nsAutoCString suffix;
  OriginAttributesRef().CreateSuffix(suffix);

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

  return NS_OK;
}