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96575de147
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.
102 lines
2.7 KiB
C++
102 lines
2.7 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 __ClearKeyDecryptionManager_h__
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#define __ClearKeyDecryptionManager_h__
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#include <map>
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#include "ClearKeyUtils.h"
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#include "RefCounted.h"
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class ClearKeyDecryptor;
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class CryptoMetaData {
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public:
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CryptoMetaData() {}
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explicit CryptoMetaData(const GMPEncryptedBufferMetadata* aCrypto)
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{
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Init(aCrypto);
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}
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void Init(const GMPEncryptedBufferMetadata* aCrypto)
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{
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if (!aCrypto) {
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assert(!IsValid());
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return;
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}
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Assign(mKeyId, aCrypto->KeyId(), aCrypto->KeyIdSize());
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Assign(mIV, aCrypto->IV(), aCrypto->IVSize());
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Assign(mClearBytes, aCrypto->ClearBytes(), aCrypto->NumSubsamples());
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Assign(mCipherBytes, aCrypto->CipherBytes(), aCrypto->NumSubsamples());
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}
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bool IsValid() const {
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return !mKeyId.empty() &&
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!mIV.empty() &&
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!mCipherBytes.empty() &&
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!mClearBytes.empty();
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}
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size_t NumSubsamples() const {
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assert(mClearBytes.size() == mCipherBytes.size());
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return mClearBytes.size();
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}
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std::vector<uint8_t> mKeyId;
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std::vector<uint8_t> mIV;
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std::vector<uint16_t> mClearBytes;
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std::vector<uint32_t> mCipherBytes;
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};
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class ClearKeyDecryptionManager : public RefCounted
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{
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private:
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ClearKeyDecryptionManager();
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~ClearKeyDecryptionManager();
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static ClearKeyDecryptionManager* sInstance;
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public:
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static ClearKeyDecryptionManager* Get();
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bool HasSeenKeyId(const KeyId& aKeyId) const;
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bool HasKeyForKeyId(const KeyId& aKeyId) const;
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const Key& GetDecryptionKey(const KeyId& aKeyId);
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// Create a decryptor for the given KeyId if one does not already exist.
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void InitKey(KeyId aKeyId, Key aKey);
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void ExpectKeyId(KeyId aKeyId);
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void ReleaseKeyId(KeyId aKeyId);
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// Decrypts buffer *in place*.
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GMPErr Decrypt(uint8_t* aBuffer, uint32_t aBufferSize,
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const CryptoMetaData& aMetadata);
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GMPErr Decrypt(std::vector<uint8_t>& aBuffer,
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const CryptoMetaData& aMetadata);
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void Shutdown();
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private:
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bool IsExpectingKeyForKeyId(const KeyId& aKeyId) const;
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std::map<KeyId, ClearKeyDecryptor*> mDecryptors;
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};
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#endif // __ClearKeyDecryptionManager_h__
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