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d6743b5aff
We're failing in the "Very rough kill-switch" case in GMPVideoDecoderParent::Decode() we find that too many shmems are in use when we come to send a "Decode" message to the GMP, and that causes an error which percolates up to cause the test failure. This patch changes gmp-clearkey to copy the input encrypted and compressed sample and immediately return the shmem to the parent process. We are copying the data anyway when we decrypt, so we can rejigg things so that we don't actually end up doing a second copy.
114 lines
2.9 KiB
C++
114 lines
2.9 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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#include "gmp-api/gmp-decryption.h"
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#define CLEARKEY_KEY_LEN ((size_t)16)
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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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#else
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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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#endif
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struct GMPPlatformAPI;
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extern GMPPlatformAPI* GetPlatform();
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typedef std::vector<uint8_t> KeyId;
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typedef std::vector<uint8_t> Key;
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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 void ParseCENCInitData(const uint8_t* aInitData,
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uint32_t aInitDataSize,
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std::vector<Key>& aOutKeyIds);
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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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std::string& aOutSessionType);
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static void MakeKeyRequest(const std::vector<KeyId>& aKeyIds,
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std::string& aOutRequest,
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GMPSessionType 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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GMPSessionType aSessionType);
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static const char* SessionTypeToString(GMPSessionType aSessionType);
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static bool IsValidSessionId(const char* aBuff, 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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class AutoLock {
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public:
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explicit AutoLock(GMPMutex* aMutex)
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: mMutex(aMutex)
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{
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assert(aMutex);
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if (mMutex) {
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mMutex->Acquire();
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}
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}
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~AutoLock() {
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if (mMutex) {
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mMutex->Release();
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}
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}
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private:
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GMPMutex* mMutex;
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};
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GMPMutex* GMPCreateMutex();
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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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