зеркало из https://github.com/mozilla/gecko-dev.git
107 строки
3.2 KiB
C++
107 строки
3.2 KiB
C++
/*
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* Copyright 2015, Mozilla Foundation and contributors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __ClearKeyUtils_h__
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#define __ClearKeyUtils_h__
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#include <stdint.h>
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#include <string>
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#include <vector>
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#include <assert.h>
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// This include is required in order for content_decryption_module to work
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// on Unix systems.
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#include "stddef.h"
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#include "content_decryption_module.h"
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#if 0
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void CK_Log(const char* aFmt, ...);
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#define CK_LOGE(...) CK_Log(__VA_ARGS__)
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#define CK_LOGD(...) CK_Log(__VA_ARGS__)
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#define CK_LOGW(...) CK_Log(__VA_ARGS__)
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#define CK_LOGARRAY(APREPEND, ADATA, ADATA_SIZE) CK_LogArray(APREPEND, \
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ADATA, \
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ADATA_SIZE)
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#else
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// Note: Enabling logging slows things down a LOT, especially when logging to
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// a file.
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#define CK_LOGE(...)
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#define CK_LOGD(...)
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#define CK_LOGW(...)
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#define CK_LOGARRAY(APREPEND, ADATA, ADATA_SIZE)
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#endif
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typedef std::vector<uint8_t> KeyId;
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typedef std::vector<uint8_t> Key;
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// The session response size should be within a reasonable limit.
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// The size 64 KB is referenced from web-platform-test.
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static const uint32_t kMaxSessionResponseLength = 65536;
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// Provide limitation for KeyIds length and webm initData size.
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static const uint32_t kMaxWebmInitDataSize = 65536;
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static const uint32_t kMaxKeyIdsLength = 512;
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void CK_LogArray(const char* aPrepend,
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const uint8_t* aData,
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const uint32_t aDataSize);
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struct KeyIdPair
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{
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KeyId mKeyId;
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Key mKey;
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};
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class ClearKeyUtils
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{
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public:
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static void DecryptAES(const std::vector<uint8_t>& aKey,
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std::vector<uint8_t>& aData, std::vector<uint8_t>& aIV);
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static bool ParseKeyIdsInitData(const uint8_t* aInitData,
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uint32_t aInitDataSize,
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std::vector<KeyId>& aOutKeyIds);
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static void MakeKeyRequest(const std::vector<KeyId>& aKeyIds,
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std::string& aOutRequest,
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cdm::SessionType aSessionType);
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static bool ParseJWK(const uint8_t* aKeyData, uint32_t aKeyDataSize,
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std::vector<KeyIdPair>& aOutKeys,
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cdm::SessionType aSessionType);
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static const char* SessionTypeToString(cdm::SessionType aSessionType);
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static bool IsValidSessionId(const char* aBuff, uint32_t aLength);
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static std::string ToHexString(const uint8_t * aBytes, uint32_t aLength);
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};
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template<class Container, class Element>
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inline bool
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Contains(const Container& aContainer, const Element& aElement)
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{
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return aContainer.find(aElement) != aContainer.end();
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}
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template<typename T>
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inline void
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Assign(std::vector<T>& aVec, const T* aData, size_t aLength)
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{
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aVec.assign(aData, aData + aLength);
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}
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#endif // __ClearKeyUtils_h__
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