115 lines
3.0 KiB
C++
115 lines
3.0 KiB
C++
/*
|
|
* Copyright 2015, Mozilla Foundation and contributors
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#ifndef __ClearKeyUtils_h__
|
|
#define __ClearKeyUtils_h__
|
|
|
|
#include <stdint.h>
|
|
#include <string>
|
|
#include <vector>
|
|
#include <assert.h>
|
|
#include "gmp-api/gmp-decryption.h"
|
|
|
|
#if 0
|
|
void CK_Log(const char* aFmt, ...);
|
|
#define CK_LOGE(...) CK_Log(__VA_ARGS__)
|
|
#define CK_LOGD(...) CK_Log(__VA_ARGS__)
|
|
#define CK_LOGW(...) CK_Log(__VA_ARGS__)
|
|
#else
|
|
#define CK_LOGE(...)
|
|
#define CK_LOGD(...)
|
|
#define CK_LOGW(...)
|
|
#endif
|
|
|
|
struct GMPPlatformAPI;
|
|
extern GMPPlatformAPI* GetPlatform();
|
|
|
|
typedef std::vector<uint8_t> KeyId;
|
|
typedef std::vector<uint8_t> Key;
|
|
|
|
// The session response size should be within a reasonable limit.
|
|
// The size 64 KB is referenced from web-platform-test.
|
|
static const uint32_t kMaxSessionResponseLength = 65536;
|
|
|
|
// Provide limitation for KeyIds length and webm initData size.
|
|
static const uint32_t kMaxWebmInitDataSize = 65536;
|
|
static const uint32_t kMaxKeyIdsLength = 512;
|
|
|
|
struct KeyIdPair
|
|
{
|
|
KeyId mKeyId;
|
|
Key mKey;
|
|
};
|
|
|
|
class ClearKeyUtils
|
|
{
|
|
public:
|
|
static void DecryptAES(const std::vector<uint8_t>& aKey,
|
|
std::vector<uint8_t>& aData, std::vector<uint8_t>& aIV);
|
|
|
|
static bool ParseKeyIdsInitData(const uint8_t* aInitData,
|
|
uint32_t aInitDataSize,
|
|
std::vector<KeyId>& aOutKeyIds);
|
|
|
|
static void MakeKeyRequest(const std::vector<KeyId>& aKeyIds,
|
|
std::string& aOutRequest,
|
|
GMPSessionType aSessionType);
|
|
|
|
static bool ParseJWK(const uint8_t* aKeyData, uint32_t aKeyDataSize,
|
|
std::vector<KeyIdPair>& aOutKeys,
|
|
GMPSessionType aSessionType);
|
|
static const char* SessionTypeToString(GMPSessionType aSessionType);
|
|
|
|
static bool IsValidSessionId(const char* aBuff, uint32_t aLength);
|
|
};
|
|
|
|
template<class Container, class Element>
|
|
inline bool
|
|
Contains(const Container& aContainer, const Element& aElement)
|
|
{
|
|
return aContainer.find(aElement) != aContainer.end();
|
|
}
|
|
|
|
class AutoLock {
|
|
public:
|
|
explicit AutoLock(GMPMutex* aMutex)
|
|
: mMutex(aMutex)
|
|
{
|
|
assert(aMutex);
|
|
if (mMutex) {
|
|
mMutex->Acquire();
|
|
}
|
|
}
|
|
~AutoLock() {
|
|
if (mMutex) {
|
|
mMutex->Release();
|
|
}
|
|
}
|
|
private:
|
|
GMPMutex* mMutex;
|
|
};
|
|
|
|
GMPMutex* GMPCreateMutex();
|
|
|
|
template<typename T>
|
|
inline void
|
|
Assign(std::vector<T>& aVec, const T* aData, size_t aLength)
|
|
{
|
|
aVec.assign(aData, aData + aLength);
|
|
}
|
|
|
|
#endif // __ClearKeyUtils_h__
|