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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef MEDIA_CRYPTO_AES_DECRYPTOR_H_ | 5 #ifndef MEDIA_CRYPTO_AES_DECRYPTOR_H_ |
6 #define MEDIA_CRYPTO_AES_DECRYPTOR_H_ | 6 #define MEDIA_CRYPTO_AES_DECRYPTOR_H_ |
7 | 7 |
8 #include <set> | 8 #include <set> |
9 #include <string> | 9 #include <string> |
10 | 10 |
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23 | 23 |
24 namespace media { | 24 namespace media { |
25 | 25 |
26 // Decrypts an AES encrypted buffer into an unencrypted buffer. The AES | 26 // Decrypts an AES encrypted buffer into an unencrypted buffer. The AES |
27 // encryption must be CTR with a key size of 128bits. | 27 // encryption must be CTR with a key size of 128bits. |
28 class MEDIA_EXPORT AesDecryptor : public MediaKeys, public Decryptor { | 28 class MEDIA_EXPORT AesDecryptor : public MediaKeys, public Decryptor { |
29 public: | 29 public: |
30 AesDecryptor(const SessionMessageCB& session_message_cb, | 30 AesDecryptor(const SessionMessageCB& session_message_cb, |
31 const SessionClosedCB& session_closed_cb, | 31 const SessionClosedCB& session_closed_cb, |
32 const SessionKeysChangeCB& session_keys_change_cb); | 32 const SessionKeysChangeCB& session_keys_change_cb); |
33 virtual ~AesDecryptor(); | 33 ~AesDecryptor() override; |
34 | 34 |
35 // MediaKeys implementation. | 35 // MediaKeys implementation. |
36 virtual void SetServerCertificate( | 36 void SetServerCertificate(const uint8* certificate_data, |
37 const uint8* certificate_data, | 37 int certificate_data_length, |
38 int certificate_data_length, | |
39 scoped_ptr<SimpleCdmPromise> promise) override; | |
40 virtual void CreateSession(const std::string& init_data_type, | |
41 const uint8* init_data, | |
42 int init_data_length, | |
43 SessionType session_type, | |
44 scoped_ptr<NewSessionCdmPromise> promise) override; | |
45 virtual void LoadSession(const std::string& web_session_id, | |
46 scoped_ptr<NewSessionCdmPromise> promise) override; | |
47 virtual void UpdateSession(const std::string& web_session_id, | |
48 const uint8* response, | |
49 int response_length, | |
50 scoped_ptr<SimpleCdmPromise> promise) override; | |
51 virtual void CloseSession(const std::string& web_session_id, | |
52 scoped_ptr<SimpleCdmPromise> promise) override; | 38 scoped_ptr<SimpleCdmPromise> promise) override; |
53 virtual void RemoveSession(const std::string& web_session_id, | 39 void CreateSession(const std::string& init_data_type, |
54 scoped_ptr<SimpleCdmPromise> promise) override; | 40 const uint8* init_data, |
55 virtual void GetUsableKeyIds(const std::string& web_session_id, | 41 int init_data_length, |
56 scoped_ptr<KeyIdsPromise> promise) override; | 42 SessionType session_type, |
57 virtual Decryptor* GetDecryptor() override; | 43 scoped_ptr<NewSessionCdmPromise> promise) override; |
| 44 void LoadSession(const std::string& web_session_id, |
| 45 scoped_ptr<NewSessionCdmPromise> promise) override; |
| 46 void UpdateSession(const std::string& web_session_id, |
| 47 const uint8* response, |
| 48 int response_length, |
| 49 scoped_ptr<SimpleCdmPromise> promise) override; |
| 50 void CloseSession(const std::string& web_session_id, |
| 51 scoped_ptr<SimpleCdmPromise> promise) override; |
| 52 void RemoveSession(const std::string& web_session_id, |
| 53 scoped_ptr<SimpleCdmPromise> promise) override; |
| 54 void GetUsableKeyIds(const std::string& web_session_id, |
| 55 scoped_ptr<KeyIdsPromise> promise) override; |
| 56 Decryptor* GetDecryptor() override; |
58 #if defined(ENABLE_BROWSER_CDMS) | 57 #if defined(ENABLE_BROWSER_CDMS) |
59 virtual int GetCdmId() const override; | 58 virtual int GetCdmId() const override; |
60 #endif // defined(ENABLE_BROWSER_CDMS) | 59 #endif // defined(ENABLE_BROWSER_CDMS) |
61 | 60 |
62 // Decryptor implementation. | 61 // Decryptor implementation. |
63 virtual void RegisterNewKeyCB(StreamType stream_type, | 62 void RegisterNewKeyCB(StreamType stream_type, |
64 const NewKeyCB& key_added_cb) override; | 63 const NewKeyCB& key_added_cb) override; |
65 virtual void Decrypt(StreamType stream_type, | 64 void Decrypt(StreamType stream_type, |
66 const scoped_refptr<DecoderBuffer>& encrypted, | 65 const scoped_refptr<DecoderBuffer>& encrypted, |
67 const DecryptCB& decrypt_cb) override; | 66 const DecryptCB& decrypt_cb) override; |
68 virtual void CancelDecrypt(StreamType stream_type) override; | 67 void CancelDecrypt(StreamType stream_type) override; |
69 virtual void InitializeAudioDecoder(const AudioDecoderConfig& config, | 68 void InitializeAudioDecoder(const AudioDecoderConfig& config, |
70 const DecoderInitCB& init_cb) override; | 69 const DecoderInitCB& init_cb) override; |
71 virtual void InitializeVideoDecoder(const VideoDecoderConfig& config, | 70 void InitializeVideoDecoder(const VideoDecoderConfig& config, |
72 const DecoderInitCB& init_cb) override; | 71 const DecoderInitCB& init_cb) override; |
73 virtual void DecryptAndDecodeAudio( | 72 void DecryptAndDecodeAudio(const scoped_refptr<DecoderBuffer>& encrypted, |
74 const scoped_refptr<DecoderBuffer>& encrypted, | 73 const AudioDecodeCB& audio_decode_cb) override; |
75 const AudioDecodeCB& audio_decode_cb) override; | 74 void DecryptAndDecodeVideo(const scoped_refptr<DecoderBuffer>& encrypted, |
76 virtual void DecryptAndDecodeVideo( | 75 const VideoDecodeCB& video_decode_cb) override; |
77 const scoped_refptr<DecoderBuffer>& encrypted, | 76 void ResetDecoder(StreamType stream_type) override; |
78 const VideoDecodeCB& video_decode_cb) override; | 77 void DeinitializeDecoder(StreamType stream_type) override; |
79 virtual void ResetDecoder(StreamType stream_type) override; | |
80 virtual void DeinitializeDecoder(StreamType stream_type) override; | |
81 | 78 |
82 private: | 79 private: |
83 // TODO(fgalligan): Remove this and change KeyMap to use crypto::SymmetricKey | 80 // TODO(fgalligan): Remove this and change KeyMap to use crypto::SymmetricKey |
84 // as there are no decryptors that are performing an integrity check. | 81 // as there are no decryptors that are performing an integrity check. |
85 // Helper class that manages the decryption key. | 82 // Helper class that manages the decryption key. |
86 class DecryptionKey { | 83 class DecryptionKey { |
87 public: | 84 public: |
88 explicit DecryptionKey(const std::string& secret); | 85 explicit DecryptionKey(const std::string& secret); |
89 ~DecryptionKey(); | 86 ~DecryptionKey(); |
90 | 87 |
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150 // Protect |new_audio_key_cb_| and |new_video_key_cb_| as they are set on the | 147 // Protect |new_audio_key_cb_| and |new_video_key_cb_| as they are set on the |
151 // main thread but called on the media thread. | 148 // main thread but called on the media thread. |
152 mutable base::Lock new_key_cb_lock_; | 149 mutable base::Lock new_key_cb_lock_; |
153 | 150 |
154 DISALLOW_COPY_AND_ASSIGN(AesDecryptor); | 151 DISALLOW_COPY_AND_ASSIGN(AesDecryptor); |
155 }; | 152 }; |
156 | 153 |
157 } // namespace media | 154 } // namespace media |
158 | 155 |
159 #endif // MEDIA_CRYPTO_AES_DECRYPTOR_H_ | 156 #endif // MEDIA_CRYPTO_AES_DECRYPTOR_H_ |
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