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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/. */
/**
* 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 "nsNullPrincipal.h"
#include "nsNullPrincipalURI.h"
#include "nsMemory.h"
#include "nsIURIWithPrincipal.h"
#include "nsIClassInfoImpl.h"
#include "nsNetCID.h"
#include "nsError.h"
#include "nsIObjectInputStream.h"
#include "nsIObjectOutputStream.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());
MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
return nullPrin.forget();
}
/* static */ already_AddRefed<nsNullPrincipal>
nsNullPrincipal::CreateWithInheritedAttributes(nsIDocShell* aDocShell)
{
PrincipalOriginAttributes attrs;
attrs.InheritFromDocShellToDoc(nsDocShell::Cast(aDocShell)->GetOriginAttributes(), nullptr);
RefPtr<nsNullPrincipal> nullPrin = new nsNullPrincipal();
nsresult rv = nullPrin->Init(attrs);
MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
return nullPrin.forget();
}
/* static */ already_AddRefed<nsNullPrincipal>
nsNullPrincipal::Create(const PrincipalOriginAttributes& aOriginAttributes)
{
RefPtr<nsNullPrincipal> nullPrin = new nsNullPrincipal();
nsresult rv = nullPrin->Init(aOriginAttributes);
MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
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;
}
nsresult
nsNullPrincipal::GetScriptLocation(nsACString &aStr)
{
return 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::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
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;
}
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