60d010d18d
Merge from Widevine repo of http://go/wvgerrit/54540 Addressing comments in http://go/ag/4448747 Test: tested as part of http://go/ag/4674759 Change-Id: I29005397efcc2e982e635581cc68c8293cea6243
96 lines
2.7 KiB
C++
96 lines
2.7 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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//
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// Reference implementation of OEMCrypto APIs
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//
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// This is from the v12 version of oemcrypto usage tables. It is used for
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// devices that upgrade from v12 to v13 in the field, and need to convert from
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// the old type of usage table to the new.
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#ifndef OEMCRYPTO_OLD_USAGE_TABLE_REF_H_
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#define OEMCRYPTO_OLD_USAGE_TABLE_REF_H_
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#include <stdint.h>
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#include <map>
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#include <string>
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#include <vector>
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#include "OEMCryptoCENC.h"
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#include "lock.h"
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#include "oemcrypto_types.h"
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#include "openssl/sha.h"
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namespace wvoec_ref {
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class CryptoEngine;
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class UsagetTableEntry;
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struct OldStoredUsageEntry {
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// To save disk space, we only store a hash of the pst.
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uint8_t pst_hash[SHA256_DIGEST_LENGTH];
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int64_t time_of_license_received;
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int64_t time_of_first_decrypt;
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int64_t time_of_last_decrypt;
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enum OEMCrypto_Usage_Entry_Status status;
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uint8_t mac_key_server[wvoec::MAC_KEY_SIZE];
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uint8_t mac_key_client[wvoec::MAC_KEY_SIZE];
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};
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typedef union {
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struct OldStoredUsageEntry entry;
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uint8_t padding[128]; // multiple of block size and bigger than entry size.
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} AlignedOldStoredUsageEntry;
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struct OldStoredUsageTable {
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uint8_t signature[SHA256_DIGEST_LENGTH];
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uint8_t iv[wvoec::KEY_IV_SIZE];
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int64_t generation;
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uint64_t count;
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AlignedOldStoredUsageEntry entries[];
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};
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class OldUsageTableEntry {
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public:
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OldUsageTableEntry(const std::vector<uint8_t> &pst_hash);
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OldUsageTableEntry(const OldStoredUsageEntry *buffer);
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~OldUsageTableEntry();
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const std::vector<uint8_t> &pst_hash() const { return pst_hash_; }
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private:
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std::vector<uint8_t> pst_hash_;
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int64_t time_of_license_received_;
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int64_t time_of_first_decrypt_;
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int64_t time_of_last_decrypt_;
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enum OEMCrypto_Usage_Entry_Status status_;
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std::vector<uint8_t> mac_key_server_;
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std::vector<uint8_t> mac_key_client_;
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friend class UsageTableEntry;
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friend class UsageTable;
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};
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class OldUsageTable {
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public:
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OldUsageTable(CryptoEngine *ce);
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~OldUsageTable() { Clear(); }
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OldUsageTableEntry *FindEntry(const std::vector<uint8_t> &pst);
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OldUsageTableEntry *CreateEntry(const std::vector<uint8_t> &pst);
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void Clear();
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static void DeleteFile(CryptoEngine *ce);
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private:
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OldUsageTableEntry *FindEntryLocked(const std::vector<uint8_t> &pst);
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bool ComputeHash(const std::vector<uint8_t> &pst,
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std::vector<uint8_t> &pst_hash);
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typedef std::map<std::vector<uint8_t>, OldUsageTableEntry *> EntryMap;
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EntryMap table_;
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wvcdm::Lock lock_;
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int64_t generation_;
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CryptoEngine *ce_;
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};
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} // namespace wvoec_ref
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#endif // OEMCRYPTO_OLD_USAGE_TABLE_REF_H_
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