cs_KeysAndAccess.h

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/*
 * Author: Crownstone Team
 * Copyright: Crownstone (https://crownstone.rocks)
 * Date: Oct 16, 2020
 * License: LGPLv3+, Apache License 2.0, and/or MIT (triple-licensed)
 */
 
#pragma once
 
#include <common/cs_Types.h>
#include <protocol/cs_Packets.h>
 
class KeysAndAccess {
public:
    static KeysAndAccess& getInstance() {
        static KeysAndAccess instance;
        return instance;
    }
 
    void init();
 
    bool allowAccess(EncryptionAccessLevel minimum, EncryptionAccessLevel provided);
 
    bool getKey(EncryptionAccessLevel accessLevel, buffer_ptr_t outBuf, cs_buffer_size_t outBufSize);
 
    cs_data_t getSetupKey();
 
    void generateSetupKey();
 
    cs_ret_code_t setSetupKey(cs_data_t data);
 
    void invalidateSetupKey();
 
private:
    // This class is singleton, make constructor private.
    KeysAndAccess();
 
    // This class is singleton, deny implementation
    KeysAndAccess(KeysAndAccess const&);
 
    // This class is singleton, deny implementation
    void operator=(KeysAndAccess const&);
 
    OperationMode _operationMode = OperationMode::OPERATION_MODE_UNINITIALIZED;
 
    bool _encryptionEnabled      = true;
 
    uint8_t _setupKey[ENCRYPTION_KEY_LENGTH];
 
    bool _setupKeyValid = false;
};