126 lines
4.8 KiB
C++
126 lines
4.8 KiB
C++
// Copyright 2014 Google Inc. All rights reserved.
|
|
//
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file or at
|
|
// https://developers.google.com/open-source/licenses/bsd
|
|
|
|
#ifndef MEDIA_BASE_WIDEVINE_KEY_SOURCE_H_
|
|
#define MEDIA_BASE_WIDEVINE_KEY_SOURCE_H_
|
|
|
|
#include <map>
|
|
|
|
#include "packager/base/memory/scoped_ptr.h"
|
|
#include "packager/base/synchronization/waitable_event.h"
|
|
#include "packager/base/values.h"
|
|
#include "packager/media/base/closure_thread.h"
|
|
#include "packager/media/base/key_source.h"
|
|
|
|
namespace edash_packager {
|
|
namespace media {
|
|
class KeyFetcher;
|
|
class RequestSigner;
|
|
template <class T> class ProducerConsumerQueue;
|
|
|
|
/// WidevineKeySource talks to the Widevine encryption service to
|
|
/// acquire the encryption keys.
|
|
class WidevineKeySource : public KeySource {
|
|
public:
|
|
/// @param server_url is the Widevine common encryption server url.
|
|
explicit WidevineKeySource(const std::string& server_url);
|
|
|
|
~WidevineKeySource() override;
|
|
|
|
/// @name KeySource implementation overrides.
|
|
/// @{
|
|
Status FetchKeys(const std::vector<uint8_t>& content_id,
|
|
const std::string& policy) override;
|
|
Status FetchKeys(const std::vector<uint8_t>& pssh_box) override;
|
|
Status FetchKeys(const std::vector<std::vector<uint8_t>>& key_ids) override;
|
|
Status FetchKeys(uint32_t asset_id) override;
|
|
|
|
Status GetKey(TrackType track_type, EncryptionKey* key) override;
|
|
Status GetKey(const std::vector<uint8_t>& key_id,
|
|
EncryptionKey* key) override;
|
|
Status GetCryptoPeriodKey(uint32_t crypto_period_index,
|
|
TrackType track_type,
|
|
EncryptionKey* key) override;
|
|
std::string UUID() override;
|
|
/// @}
|
|
|
|
/// Set signer for the key source.
|
|
/// @param signer signs the request message.
|
|
void set_signer(scoped_ptr<RequestSigner> signer);
|
|
|
|
/// Inject an @b KeyFetcher object, mainly used for testing.
|
|
/// @param key_fetcher points to the @b KeyFetcher object to be injected.
|
|
void set_key_fetcher(scoped_ptr<KeyFetcher> key_fetcher);
|
|
|
|
protected:
|
|
ClosureThread key_production_thread_;
|
|
|
|
private:
|
|
typedef std::map<TrackType, EncryptionKey*> EncryptionKeyMap;
|
|
class RefCountedEncryptionKeyMap;
|
|
typedef ProducerConsumerQueue<scoped_refptr<RefCountedEncryptionKeyMap> >
|
|
EncryptionKeyQueue;
|
|
|
|
// Internal routine for getting keys.
|
|
Status GetKeyInternal(uint32_t crypto_period_index,
|
|
TrackType track_type,
|
|
EncryptionKey* key);
|
|
|
|
// The closure task to fetch keys repeatedly.
|
|
void FetchKeysTask();
|
|
|
|
// Fetch keys from server.
|
|
Status FetchKeysInternal(bool enable_key_rotation,
|
|
uint32_t first_crypto_period_index,
|
|
bool widevine_classic);
|
|
|
|
// Fill |request| with necessary fields for Widevine encryption request.
|
|
// |request| should not be NULL.
|
|
void FillRequest(bool enable_key_rotation,
|
|
uint32_t first_crypto_period_index,
|
|
std::string* request);
|
|
// Base64 escape and format the request. Optionally sign the request if a
|
|
// signer is provided. |message| should not be NULL. Return OK on success.
|
|
Status GenerateKeyMessage(const std::string& request, std::string* message);
|
|
// Decode |response| from JSON formatted |raw_response|.
|
|
// |response| should not be NULL.
|
|
bool DecodeResponse(const std::string& raw_response, std::string* response);
|
|
// Extract encryption key from |response|, which is expected to be properly
|
|
// formatted. |transient_error| will be set to true if it fails and the
|
|
// failure is because of a transient error from the server. |transient_error|
|
|
// should not be NULL.
|
|
bool ExtractEncryptionKey(bool enable_key_rotation,
|
|
bool widevine_classic,
|
|
const std::string& response,
|
|
bool* transient_error);
|
|
// Push the keys to the key pool.
|
|
bool PushToKeyPool(EncryptionKeyMap* encryption_key_map);
|
|
|
|
// The fetcher object used to fetch keys from the license service.
|
|
// It is initialized to a default fetcher on class initialization.
|
|
// Can be overridden using set_key_fetcher for testing or other purposes.
|
|
scoped_ptr<KeyFetcher> key_fetcher_;
|
|
std::string server_url_;
|
|
scoped_ptr<RequestSigner> signer_;
|
|
base::DictionaryValue request_dict_;
|
|
|
|
const uint32_t crypto_period_count_;
|
|
base::Lock lock_;
|
|
bool key_production_started_;
|
|
base::WaitableEvent start_key_production_;
|
|
uint32_t first_crypto_period_index_;
|
|
scoped_ptr<EncryptionKeyQueue> key_pool_;
|
|
EncryptionKeyMap encryption_key_map_; // For non key rotation request.
|
|
Status common_encryption_request_status_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(WidevineKeySource);
|
|
};
|
|
|
|
} // namespace media
|
|
} // namespace edash_packager
|
|
|
|
#endif // MEDIA_BASE_WIDEVINE_KEY_SOURCE_H_
|