74 lines
2.5 KiB
C++
74 lines
2.5 KiB
C++
// Copyright 2016 Google Inc. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file or at
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// https://developers.google.com/open-source/licenses/bsd
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#ifndef MEDIA_BASE_FIXED_KEY_SOURCE_H_
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#define MEDIA_BASE_FIXED_KEY_SOURCE_H_
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#include <memory>
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#include <string>
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#include <vector>
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#include "packager/media/base/key_source.h"
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namespace shaka {
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namespace media {
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// Common SystemID defined by EME, which requires Key System implementations
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// supporting ISO Common Encryption to support this SystemID and format.
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// https://goo.gl/kUv2Xd
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const uint8_t kCommonSystemId[] = {0x10, 0x77, 0xef, 0xec, 0xc0, 0xb2,
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0x4d, 0x02, 0xac, 0xe3, 0x3c, 0x1e,
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0x52, 0xe2, 0xfb, 0x4b};
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/// A key source that uses fixed keys for encryption.
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class FixedKeySource : public KeySource {
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public:
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~FixedKeySource() override;
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/// @name KeySource implementation overrides.
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/// @{
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Status FetchKeys(EmeInitDataType init_data_type,
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const std::vector<uint8_t>& init_data) override;
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Status GetKey(const std::string& stream_label, EncryptionKey* key) override;
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Status GetKey(const std::vector<uint8_t>& key_id,
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EncryptionKey* key) override;
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Status GetCryptoPeriodKey(uint32_t crypto_period_index,
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const std::string& stream_label,
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EncryptionKey* key) override;
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/// @}
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/// Creates a new FixedKeySource from the given data. Returns null
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/// if the strings are invalid.
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/// @param key_id is the key identifier. Must be 16 bytes.
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/// @param key is the encryption / decryption key. Must be 16 bytes.
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/// @param pssh_boxes is the concatenated pssh boxes.
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/// @param iv is the initialization vector. If not specified, a randomly
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/// generated IV with the default length will be used.
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/// Note: GetKey on the created key source will always return the same key for
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/// all track types.
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static std::unique_ptr<FixedKeySource> Create(
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const std::vector<uint8_t>& key_id,
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const std::vector<uint8_t>& key,
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const std::vector<uint8_t>& pssh_boxes,
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const std::vector<uint8_t>& iv);
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protected:
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// Allow default constructor for mock key sources.
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FixedKeySource();
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private:
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explicit FixedKeySource(std::unique_ptr<EncryptionKey> key);
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std::unique_ptr<EncryptionKey> encryption_key_;
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DISALLOW_COPY_AND_ASSIGN(FixedKeySource);
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};
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} // namespace media
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} // namespace shaka
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#endif // MEDIA_BASE_FIXED_KEY_SOURCE_H_
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