forked from mirrors/gecko-dev
00e98538aa
Differential Revision: https://phabricator.services.mozilla.com/D21106 --HG-- extra : rebase_source : ea3f51c2c11247114deccbc86e90fb02b8a97257
110 lines
3.1 KiB
C++
110 lines
3.1 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 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/. */
|
|
#include "Crypto.h"
|
|
#include "jsfriendapi.h"
|
|
#include "nsCOMPtr.h"
|
|
#include "nsIRandomGenerator.h"
|
|
#include "MainThreadUtils.h"
|
|
#include "nsXULAppAPI.h"
|
|
|
|
#include "mozilla/dom/ContentChild.h"
|
|
#include "mozilla/dom/CryptoBinding.h"
|
|
#include "nsServiceManagerUtils.h"
|
|
|
|
using mozilla::dom::ContentChild;
|
|
|
|
namespace mozilla {
|
|
namespace dom {
|
|
|
|
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Crypto)
|
|
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
|
|
NS_INTERFACE_MAP_ENTRY(nsISupports)
|
|
NS_INTERFACE_MAP_END
|
|
|
|
NS_IMPL_CYCLE_COLLECTING_ADDREF(Crypto)
|
|
NS_IMPL_CYCLE_COLLECTING_RELEASE(Crypto)
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(Crypto, mParent, mSubtle)
|
|
|
|
Crypto::Crypto(nsIGlobalObject* aParent) : mParent(aParent) {}
|
|
|
|
Crypto::~Crypto() {}
|
|
|
|
/* virtual */
|
|
JSObject* Crypto::WrapObject(JSContext* aCx,
|
|
JS::Handle<JSObject*> aGivenProto) {
|
|
return Crypto_Binding::Wrap(aCx, this, aGivenProto);
|
|
}
|
|
|
|
void Crypto::GetRandomValues(JSContext* aCx, const ArrayBufferView& aArray,
|
|
JS::MutableHandle<JSObject*> aRetval,
|
|
ErrorResult& aRv) {
|
|
JS::Rooted<JSObject*> view(aCx, aArray.Obj());
|
|
|
|
if (JS_IsTypedArrayObject(view) && JS_GetTypedArraySharedness(view)) {
|
|
// Throw if the object is mapping shared memory (must opt in).
|
|
aRv.ThrowTypeError<MSG_TYPEDARRAY_IS_SHARED>(
|
|
NS_LITERAL_STRING("Argument of Crypto.getRandomValues"));
|
|
return;
|
|
}
|
|
|
|
// Throw if the wrong type of ArrayBufferView is passed in
|
|
// (Part of the Web Crypto API spec)
|
|
switch (JS_GetArrayBufferViewType(view)) {
|
|
case js::Scalar::Int8:
|
|
case js::Scalar::Uint8:
|
|
case js::Scalar::Uint8Clamped:
|
|
case js::Scalar::Int16:
|
|
case js::Scalar::Uint16:
|
|
case js::Scalar::Int32:
|
|
case js::Scalar::Uint32:
|
|
break;
|
|
default:
|
|
aRv.Throw(NS_ERROR_DOM_TYPE_MISMATCH_ERR);
|
|
return;
|
|
}
|
|
|
|
aArray.ComputeLengthAndData();
|
|
uint32_t dataLen = aArray.Length();
|
|
if (dataLen == 0) {
|
|
NS_WARNING("ArrayBufferView length is 0, cannot continue");
|
|
aRetval.set(view);
|
|
return;
|
|
} else if (dataLen > 65536) {
|
|
aRv.Throw(NS_ERROR_DOM_QUOTA_EXCEEDED_ERR);
|
|
return;
|
|
}
|
|
|
|
nsCOMPtr<nsIRandomGenerator> randomGenerator =
|
|
do_GetService("@mozilla.org/security/random-generator;1");
|
|
if (!randomGenerator) {
|
|
aRv.Throw(NS_ERROR_DOM_OPERATION_ERR);
|
|
return;
|
|
}
|
|
|
|
uint8_t* buf;
|
|
nsresult rv = randomGenerator->GenerateRandomBytes(dataLen, &buf);
|
|
if (NS_FAILED(rv) || !buf) {
|
|
aRv.Throw(NS_ERROR_DOM_OPERATION_ERR);
|
|
return;
|
|
}
|
|
|
|
// Copy random bytes to ABV.
|
|
memcpy(aArray.Data(), buf, dataLen);
|
|
free(buf);
|
|
|
|
aRetval.set(view);
|
|
}
|
|
|
|
SubtleCrypto* Crypto::Subtle() {
|
|
if (!mSubtle) {
|
|
mSubtle = new SubtleCrypto(GetParentObject());
|
|
}
|
|
return mSubtle;
|
|
}
|
|
|
|
} // namespace dom
|
|
} // namespace mozilla
|