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/* -*- Mode: C++; tab-width: 8; 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/. */
#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_ENTRY(nsIDOMCrypto)
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()
{
MOZ_COUNT_CTOR(Crypto);
}
Crypto::~Crypto()
{
MOZ_COUNT_DTOR(Crypto);
}
void
Crypto::Init(nsIGlobalObject* aParent)
{
mParent = do_QueryInterface(aParent);
MOZ_ASSERT(mParent);
}
/* virtual */ JSObject*
Crypto::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
return CryptoBinding::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:
case js::Scalar::BigInt64:
case js::Scalar::BigUint64:
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);
}
void Crypto::RandomUUID(nsAString& aRetVal)
{
// NSID_LENGTH == 39 == 36 UUID chars + 2 curly braces + 1 NUL byte
static_assert(NSID_LENGTH == 39, "Crypto:RandomUUID: NSID_LENGTH must be 39");
nsCOMPtr<nsIUUIDGenerator> uuidgen =
do_GetService("@mozilla.org/uuid-generator;1");
nsID uuid;
nsresult rv = uuidgen->GenerateUUIDInPlace(&uuid);
char uuidBuffer[NSID_LENGTH];
uuid.ToProvidedString(uuidBuffer);
nsCString asciiString(uuidBuffer);
// Convert UUID chars to UTF-16 retval, omitting the curly braces and NUL
CopyASCIItoUTF16(Substring(asciiString, 1, NSID_LENGTH - 3), aRetVal);
}
SubtleCrypto*
Crypto::Subtle()
{
if(!mSubtle) {
mSubtle = new SubtleCrypto(GetParentObject());
}
return mSubtle;
}
} // namespace dom
} // namespace mozilla
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