/*===========================================================================
                    Combined Charging System (CCS): SECC
                                 NidNmk.h

                        initiated by Vern, Joseph
                           (since 2019/07/19)
=============================================================================*/

#include <stdint.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>

#if FIRMWARE_VERSION_COMPILE_SETTING_RELEASE_MODE == ENABLE
//Saving System Log
#define SAVE_SYS_LOG_MSG_NIDNMK_SWITCH         DISABLE      //ENABLE, DISABLE

//Configuration for Debug Print Messages
#define DEBUG_PRINTF_NIDNMK_SHOW               DISABLE      //ENABLE, DISABLE
#define DEBUG_PRINTF_NIDNMK_BRIEF_SHOW         DISABLE      //ENABLE, DISABLE
#define DEBUG_PRINTF_NIDNMK_DETAIL_SHOW        DISABLE      //ENABLE, DISABLE
#define DEBUG_PRINTF_NIDNMK_SYSTEM_LOG_SHOW    DISABLE      //ENABLE, DISABLE
#else //debug mode
//Saving System Log
#define SAVE_SYS_LOG_MSG_NIDNMK_SWITCH         ENABLE      //ENABLE, DISABLE

//Configuration for Debug Print Messages
#define DEBUG_PRINTF_NIDNMK_SHOW               ENABLE      //ENABLE, DISABLE
#define DEBUG_PRINTF_NIDNMK_BRIEF_SHOW         ENABLE      //ENABLE, DISABLE
#define DEBUG_PRINTF_NIDNMK_DETAIL_SHOW        ENABLE      //ENABLE, DISABLE
#define DEBUG_PRINTF_NIDNMK_SYSTEM_LOG_SHOW    ENABLE      //ENABLE, DISABLE
#endif

typedef struct sha256
{

    uint32_t count [2];
    uint32_t state [8];
    uint8_t block [64];
    uint8_t extra [64];

} NidSHA256;

#define SHA256_DIGEST_LENGTH 256 / 8
#define HPAVKEY_NMK_LEN 16
#define HPAVKEY_NID_LEN 7
#define SHR(word, bits) ((word & 0xFFFFFFFF) >> bits)
#define ROTR(word, bits) (SHR(word, bits) | (word << (32 - bits)))
#define DEFAULT_LEVEL 0
//--------------------------------------------------------------------------
/* Functions -----------------------------------------------------------*/
//--------------------------------------------------------------------------
void HPAVKeyNMK(uint8_t NMK [], const char *string);
void HPAVKeyNID(uint8_t NID [], const uint8_t NMK [], uint8_t level);
void SHA256Reset(struct sha256 *sha256);
void SHA256Block(struct sha256 *sha256, void const *memory);
void SHA256Write(struct sha256 *sha256, void const *memory, uint16_t extent);
void SHAEncode(uint8_t memory [], uint32_t number);
void SHA256Fetch(struct sha256 *sha256, uint8_t digest []);

//System Log
#if SAVE_SYS_LOG_MSG_NIDNMK_SWITCH == ENABLE
    #define SAVE_SYS_LOG_MSG_NIDNMK     StoreLogMsg
#else
    #define SAVE_SYS_LOG_MSG_NIDNMK(...)
#endif

//Debug Message
#if DEBUG_PRINTF_NIDNMK_SHOW == ENABLE
    //Brief Messages
    #if DEBUG_PRINTF_NIDNMK_BRIEF_SHOW == ENABLE
        #define DEBUG_PRINTF_NIDNMK_BRIEF      printf
    #else
        #define DEBUG_PRINTF_NIDNMK_BRIEF(...)
    #endif

    //Detail Messages
    #if DEBUG_PRINTF_NIDNMK_DETAIL_SHOW == ENABLE
        #define DEBUG_PRINTF_NIDNMK_DETAIL     printf
    #else
        #define DEBUG_PRINTF_NIDNMK_DETAIL(...)
    #endif

    //System Log Messages
    #if DEBUG_PRINTF_NIDNMK_SYSTEM_LOG_SHOW == ENABLE
        #define DEBUG_PRINTF_NIDNMK_SYSTEM_LOG    printf
    #else
        #define DEBUG_PRINTF_NIDNMK_SYSTEM_LOG(...)
    #endif
#else
    #define DEBUG_PRINTF_NIDNMK_BRIEF(...)
    #define DEBUG_PRINTF_NIDNMK_DETAIL(...)
    #define DEBUG_PRINTF_NIDNMK_SYSTEM_LOG(...)
#endif