5f209e6980
Note that this version does not have Widevine Provisioning 4.0 support. It is only suitable for device upgrades. A new patch with provisioning 4.0 support will be made later.
86 lines
3.0 KiB
C++
86 lines
3.0 KiB
C++
// Copyright 2018 Google LLC. All Rights Reserved. This file and proprietary
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// source code may only be used and distributed under the Widevine Master
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// License Agreement.
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#ifndef ECM_PARSER_V2_H
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#define ECM_PARSER_V2_H
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#include <memory>
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#include <vector>
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#include "cas_types.h"
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#include "ecm_parser.h"
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namespace wvcas {
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struct EcmKeyData;
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// EcmParserV2 allows random access to the fields of an ECM version 2 and under.
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// It should be initialized via EcmParser factory create only.
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class EcmParserV2 : public EcmParser {
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public:
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~EcmParserV2() override = default;
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EcmParserV2(const EcmParserV2&) = delete;
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EcmParserV2& operator=(const EcmParserV2&) = delete;
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// The EcmParserV2 factory method.
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// |ecm| must be Widevine ECM v2 or under without section header.
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// Validates the ecm. The only validation performed is to ensure that the ecm
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// passed in is large enough to hold a single key entry. If validations is
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// successful returns true and constructs an EcmParserV2 in |parser| using
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// |ecm|.
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static bool create(const CasEcm& cas_ecm,
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std::unique_ptr<EcmParserV2>* parser);
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// Accessor methods.
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uint8_t version() const override;
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CryptoMode crypto_mode() const override;
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bool rotation_enabled() const override;
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size_t content_iv_size() const override;
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uint8_t age_restriction() const override;
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std::vector<uint8_t> entitlement_key_id(KeySlotId id) const override;
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std::vector<uint8_t> content_key_id(KeySlotId id) const override;
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std::vector<uint8_t> wrapped_key_data(KeySlotId id) const override;
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std::vector<uint8_t> wrapped_key_iv(KeySlotId id) const override;
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std::vector<uint8_t> content_iv(KeySlotId id) const override;
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// Group keys not supported in v2.
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bool set_group_id(const std::string& group_id) override {
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return group_id.empty();
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};
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// ECM v2 or under does not have these fields.
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bool has_fingerprinting() const override { return false; }
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video_widevine::Fingerprinting fingerprinting() const override {
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video_widevine::Fingerprinting fingerprinting;
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return fingerprinting;
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}
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bool has_service_blocking() const override { return false; };
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video_widevine::ServiceBlocking service_blocking() const override {
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video_widevine::ServiceBlocking service_blocking;
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return service_blocking;
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}
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std::string ecm_serialized_payload() const override { return ""; }
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std::string signature() const override { return ""; }
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bool is_entitlement_rotation_enabled() const override { return false; }
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uint32_t entitlement_period_index() const override { return 0; }
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uint32_t entitlement_rotation_window_left() const override { return 0; }
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private:
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// Constructs an EcmParserV2 using |ecm|.
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explicit EcmParserV2(const CasEcm& ecm);
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size_t key_data_size() const;
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// Returns false if the ecm used to construct the object is not a valid size.
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// TODO(jfore): Add validation using the version field.
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bool is_valid_size() const;
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const EcmKeyData* key_slot_data(KeySlotId id) const;
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CasEcm ecm_;
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};
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} // namespace wvcas
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#endif // ECM_PARSER_V2_H
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