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/*
*
* Copyright (c) 2022 Project CHIP Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @file
* Open IoT SDK key-value storage base on flash TDBStore.
*/
#pragma once
#include <functional>
#include <string.h>
#include <lib/core/CHIPPersistentStorageDelegate.h>
#include <platform/PersistedStorage.h>
#include <platform/internal/CHIPDeviceLayerInternal.h>
#include <platform/internal/testing/ConfigUnitTest.h>
#include <psa/protected_storage.h>
namespace chip {
namespace DeviceLayer {
namespace Internal {
using namespace chip::Platform::PersistedStorage;
// PSA Protected Storage interface provides 64-bit ID number,
// For Matter we reserved region ranges from 0x00010000 to 0x0001FFFF
// e.g. key = 0x010214
// '01' = Matter region
// '02' = the sub region group base offset (Factory, Config, Counter or KVS)
// '14' = the id offset inside the group.
constexpr Key kMatterPsaPaKeyRegion = 0x010000U;
constexpr inline Key GetPsaPaKey(Key group, uint8_t id)
{
return kMatterPsaPaKeyRegion | (group) << 8 | id;
}
#define KVS_MAX_ENTRIES 30
#define KVS_KEY_MAP_UPDATE_DELAY_SEC 5
/**
* This class provides access to configuration information for Open IoT SDK platform
* stored in PSA Protected Storage.
*/
class KVPsaPsStore
{
public:
using Key = chip::Platform::PersistedStorage::Key;
// Persistent config values set at manufacturing time. Retained during factory reset.
static const Key kMatterFactory_KeyOffset;
// Persistent config values set at runtime. Cleared during factory reset.
static const Key kMatterConfig_KeyOffset;
// Persistent counter values set at runtime. Retained during factory reset.
static const Key kMatterCounter_KeyOffset;
// Persistent config values set at runtime. Cleared during factory reset.
static const Key kMatterKvs_KeyOffset;
// Key definitions for well-known keys.
// Factory keys
static const Key kConfigKey_SerialNum;
static const Key kConfigKey_MfrDeviceId;
static const Key kConfigKey_MfrDeviceCert;
static const Key kConfigKey_MfrDeviceICACerts;
static const Key kConfigKey_MfrDevicePrivateKey;
static const Key kConfigKey_HardwareVersion;
static const Key kConfigKey_ManufacturingDate;
static const Key kConfigKey_SetupPinCode;
static const Key kConfigKey_SetupDiscriminator;
static const Key kConfigKey_Spake2pIterationCount;
static const Key kConfigKey_Spake2pSalt;
static const Key kConfigKey_Spake2pVerifier;
static const Key kConfigKey_VendorId;
static const Key kConfigKey_ProductId;
// Config Keys
static const Key kConfigKey_ServiceConfig;
static const Key kConfigKey_PairedAccountId;
static const Key kConfigKey_ServiceId;
static const Key kConfigKey_LastUsedEpochKeyId;
static const Key kConfigKey_FailSafeArmed;
static const Key kConfigKey_WiFiStationSecType;
static const Key kConfigKey_RegulatoryLocation;
static const Key kConfigKey_CountryCode;
static const Key kConfigKey_LocationCapability;
static const Key kConfigKey_UniqueId;
// Counter Keys
static const Key kCounterKey_RebootCount;
static const Key kCounterKey_UpTime;
static const Key kCounterKey_TotalOperationalHours;
static const Key kCounterKey_BootReason;
// KVS storage Keys
static const Key kConfigKey_KvsStringKeyMap;
static const Key kConfigKey_KvsFirstKeySlot;
static const Key kConfigKey_KvsLastKeySlot;
// NVS helper variables
static const Key kMinConfigKey_MatterConfig;
static const Key kMaxConfigKey_MatterConfig;
static const Key kMinConfigKey_MatterCounter;
static const Key kMaxConfigKey_MatterCounter;
static const Key kMinMatterPsaPaKeyRegion;
static const Key kMaxMatterPsaPaKeyRegion;
static CHIP_ERROR Init(void);
static CHIP_ERROR Shutdown(void);
// Config value accessors.
static CHIP_ERROR ReadConfigValue(Key key, bool & val);
static CHIP_ERROR ReadConfigValue(Key key, uint32_t & val);
static CHIP_ERROR ReadConfigValue(Key key, uint64_t & val);
static CHIP_ERROR ReadConfigValueStr(Key key, char * buf, size_t bufSize, size_t & outLen);
static CHIP_ERROR ReadConfigValueBin(Key key, uint8_t * buf, size_t bufSize, size_t & outLen);
static CHIP_ERROR ReadConfigValueBin(Key key, uint8_t * buf, size_t bufSize, size_t & outLen, size_t offset);
static CHIP_ERROR ReadConfigValueCounter(Key counterId, uint32_t & val);
static CHIP_ERROR WriteConfigValue(Key key, bool val);
static CHIP_ERROR WriteConfigValue(Key key, uint32_t val);
static CHIP_ERROR WriteConfigValue(Key key, uint64_t val);
static CHIP_ERROR WriteConfigValueStr(Key key, const char * str);
static CHIP_ERROR WriteConfigValueStr(Key key, const char * str, size_t strLen);
static CHIP_ERROR WriteConfigValueBin(Key key, const uint8_t * data, size_t dataLen);
static CHIP_ERROR WriteConfigValueCounter(Key counterId, uint32_t val);
static CHIP_ERROR ClearConfigValue(Key key);
// Additional functions
static CHIP_ERROR FactoryResetConfig(void);
static void RunConfigUnitTest(void);
static bool ConfigValueExists(Key key);
static bool ValidKvsKey(Key key);
static void KVSKeyMapUpdate(void);
static void ScheduleKVSKeyMapUpdate(void);
protected:
using ForEachObjectFunct = std::function<CHIP_ERROR(const Key & key, const size_t & size)>;
static CHIP_ERROR ForEachObject(Key firstKey, Key lastKey, bool addNewRecord, ForEachObjectFunct funct);
private:
// NVS helper functions.
static bool ValidConfigKey(Key key);
static bool ConfigValueExists(Key key, size_t & size);
static CHIP_ERROR PsaStatus2ChipError(psa_status_t status);
static void OnScheduleKVSKeyMapUpdate(System::Layer * systemLayer, void * appState);
static bool initialized;
};
class KVPsaPsStoreKeyBuilder
{
public:
KVPsaPsStoreKeyBuilder(const char * key);
~KVPsaPsStoreKeyBuilder();
void AddKey(void);
void RemoveKey(void);
KVPsaPsStore::Key GetKey() const;
private:
KVPsaPsStore::Key keyValue;
char buffer[PersistentStorageDelegate::kKeyLengthMax + 1];
bool valid;
bool existing;
};
inline KVPsaPsStore::Key KVPsaPsStoreKeyBuilder::GetKey() const
{
return valid ? keyValue : 0;
}
} // namespace Internal
} // namespace DeviceLayer
} // namespace chip
using KVStoreConfig = chip::DeviceLayer::Internal::KVPsaPsStore;
using KVStoreKeyBuilder = chip::DeviceLayer::Internal::KVPsaPsStoreKeyBuilder;