// Copyright 2019 Google LLC. All rights reserved. This file and proprietary
// source code may only be used and distributed under the Widevine
// License Agreement.

#ifndef WIDEVINE_ODK_SRC_ODK_STRUCTS_PRIV_H_
#define WIDEVINE_ODK_SRC_ODK_STRUCTS_PRIV_H_

#include <stdint.h>

#include "OEMCryptoCENCCommon.h"
#include "odk_structs.h"

#ifdef __cplusplus
extern "C" {
#endif

typedef enum {
  ODK_License_Request_Type = 1,
  ODK_License_Response_Type = 2,
  ODK_Renewal_Request_Type = 3,
  ODK_Renewal_Response_Type = 4,
  ODK_Provisioning_Request_Type = 5,
  ODK_Provisioning_Response_Type = 6,

  // Reserve future message types to support forward compatibility.
  ODK_Release_Request_Type = 7,
  ODK_Release_Response_Type = 8,
  ODK_Common_Request_Type = 9,
  ODK_Common_Response_Type = 10,
} ODK_MessageType;

typedef struct {
  uint32_t message_type;
  uint32_t message_length;
  ODK_NonceValues nonce_values;
} ODK_CoreMessage;

typedef struct {
  ODK_CoreMessage core_message;
} ODK_PreparedLicenseRequest;

typedef struct {
  ODK_CoreMessage core_message;
  uint64_t playback_time;
} ODK_PreparedRenewalRequest;

typedef struct {
  ODK_CoreMessage core_message;
  uint32_t device_id_length;
  uint8_t device_id[ODK_DEVICE_ID_LEN_MAX];
} ODK_PreparedProvisioningRequest;

typedef struct {
  ODK_CoreMessage core_message;
} ODK_PreparedCommonRequest;

typedef struct {
  ODK_PreparedLicenseRequest request;
  ODK_ParsedLicense* parsed_license;
  uint8_t request_hash[ODK_SHA256_HASH_SIZE];
} ODK_LicenseResponse;

typedef struct {
  ODK_PreparedRenewalRequest request;
  uint64_t renewal_duration_seconds;
} ODK_RenewalResponse;

typedef struct {
  ODK_PreparedProvisioningRequest request;
  ODK_ParsedProvisioning* parsed_provisioning;
} ODK_ProvisioningResponse;

// These are the sum of sizeof of each individual member of the request structs
// without any padding added by the compiler. Make sure they get updated when
// request structs change. Refer to test suite OdkSizeTest in
// ../test/odk_test.cpp for validations of each of the defined request sizes.
#define ODK_LICENSE_REQUEST_SIZE 20u
#define ODK_RENEWAL_REQUEST_SIZE 28u
#define ODK_PROVISIONING_REQUEST_SIZE 88u

// These are the possible timer status values.
#define ODK_CLOCK_TIMER_STATUS_UNDEFINED 0u  // Should not happen.
// When the structure has been initialized, but no license is loaded.
#define ODK_CLOCK_TIMER_STATUS_LICENSE_NOT_LOADED 1u
// After the license is loaded, before a successful decrypt.
#define ODK_CLOCK_TIMER_STATUS_LICENSE_LOADED 2u
// After the license is loaded, if a renewal has also been loaded.
#define ODK_CLOCK_TIMER_STATUS_RENEWAL_LOADED 3u
// The first decrypt has occurred and the timer is active.
#define ODK_CLOCK_TIMER_STATUS_ACTIVE 4u
// The first decrypt has occurred and the timer is unlimited.
#define ODK_CLOCK_TIMER_STATUS_UNLIMITED 5u
// The timer has transitioned from active to expired.
#define ODK_CLOCK_TIMER_STATUS_EXPIRED 6u
// The license has been marked as inactive.
#define ODK_CLOCK_TIMER_STATUS_LICENSE_INACTIVE 7u

// A helper function for computing timer limits when a renewal is loaded.
OEMCryptoResult ODK_ComputeRenewalDuration(const ODK_TimerLimits* timer_limits,
                                           ODK_ClockValues* clock_values,
                                           uint64_t system_time_seconds,
                                           uint64_t new_renewal_duration,
                                           uint64_t* timer_value);

#ifdef __cplusplus
}
#endif

#endif  // WIDEVINE_ODK_SRC_ODK_STRUCTS_PRIV_H_