зеркало из https://github.com/mozilla/gecko-dev.git
115 строки
3.2 KiB
C++
115 строки
3.2 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 "js/ScalarType.h"
|
|
#include "js/experimental/TypedData.h" // JS_GetArrayBufferViewType
|
|
#include "nsCOMPtr.h"
|
|
#include "nsIRandomGenerator.h"
|
|
#include "nsReadableUtils.h"
|
|
|
|
#include "mozilla/dom/CryptoBinding.h"
|
|
#include "mozilla/dom/SubtleCrypto.h"
|
|
#include "nsServiceManagerUtils.h"
|
|
|
|
namespace mozilla::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() = default;
|
|
|
|
/* 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());
|
|
|
|
// 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:
|
|
case js::Scalar::BigInt64:
|
|
case js::Scalar::BigUint64:
|
|
break;
|
|
default:
|
|
aRv.Throw(NS_ERROR_DOM_TYPE_MISMATCH_ERR);
|
|
return;
|
|
}
|
|
|
|
aArray.ComputeState();
|
|
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);
|
|
}
|
|
|
|
void Crypto::RandomUUID(nsACString& aRetVal) {
|
|
// NSID_LENGTH == 39 == 36 UUID chars + 2 curly braces + 1 NUL byte
|
|
static_assert(NSID_LENGTH == 39);
|
|
|
|
nsIDToCString uuidString(nsID::GenerateUUID());
|
|
MOZ_ASSERT(strlen(uuidString.get()) == NSID_LENGTH - 1);
|
|
|
|
// Omit the curly braces and NUL.
|
|
aRetVal = Substring(uuidString.get() + 1, NSID_LENGTH - 3);
|
|
MOZ_ASSERT(aRetVal.Length() == NSID_LENGTH - 3);
|
|
}
|
|
|
|
SubtleCrypto* Crypto::Subtle() {
|
|
if (!mSubtle) {
|
|
mSubtle = new SubtleCrypto(GetParentObject());
|
|
}
|
|
return mSubtle;
|
|
}
|
|
|
|
} // namespace mozilla::dom
|