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/**
 * @file n32g45x_hash.h
 * @author Nations
 * @version v1.0.1
 *
 * @copyright Copyright (c) 2019, Nations Technologies Inc. All rights reserved.
 */
#ifndef __N32G45X_HASH_H__
#define __N32G45X_HASH_H__

#include <stdint.h>
/** @addtogroup N32G45X_Algorithm_Library
 * @{
 */

/** @addtogroup HASH
 * @brief Message digest algorithms
 * @{
 */
#define  ALG_SHA1     (uint16_t)(0x0004)
#define  ALG_SHA224   (uint16_t)(0x000A)
#define  ALG_SHA256   (uint16_t)(0x000B)
#define  ALG_MD5      (uint16_t)(0x000C)
#define  ALG_SM3        (uint16_t)(0x0012)

enum
{
    HASH_SEQUENCE_TRUE = 0x0105A5A5,//save IV
    HASH_SEQUENCE_FALSE = 0x010A5A5A, //not save IV 
    HASH_Init_OK = 0,//hash init success
    HASH_Start_OK = 0,//hash update success
    HASH_Update_OK = 0,//hash update success
    HASH_Complete_OK = 0,//hash complete success
    HASH_Close_OK = 0,//hash close success
    HASH_ByteLenPlus_OK = 0,//byte length plus success
    HASH_PadMsg_OK = 0,//message padding success
    HASH_ProcMsgBuf_OK = 0, //message processing success
    SHA1_Hash_OK = 0,//sha1 operation success
    SM3_Hash_OK = 0,//sm3 operation success
    SHA224_Hash_OK = 0,//sha224 operation success
    SHA256_Hash_OK = 0,//sha256 operation success
    MD5_Hash_OK = 0,//MD5 operation success
    
    HASH_Init_ERROR = 0x01044400,//hash init error
    HASH_Start_ERROR, //hash start error
    HASH_Update_ERROR, //hash update error
    HASH_ByteLenPlus_ERROR,//hash byte plus error
};

struct _HASH_CTX_;

typedef struct
{
    const uint16_t HashAlgID;//choice hash algorithm
    const uint32_t * const K, KLen;//K and word length of K
    const uint32_t * const IV, IVLen;//IV and word length of IV
    const uint32_t HASH_SACCR, HASH_HASHCTRL;//relate registers
    const uint32_t BlockByteLen, BlockWordLen; //byte length of block, word length of block
    const uint32_t DigestByteLen, DigestWordLen; //byte length of digest,word length of digest
    const uint32_t Cycle; //interation times
    uint32_t (* const ByteLenPlus)(uint32_t *, uint32_t); //function pointer
    uint32_t (* const PadMsg)(struct _HASH_CTX_ *); //function pointer
}HASH_ALG;

typedef struct _HASH_CTX_
{
    const HASH_ALG  *hashAlg;//pointer to HASH_ALG
    uint32_t        sequence;   // TRUE if the IV should be saved
    uint32_t    IV[16]; 
    uint32_t    msgByteLen[4];
    uint8_t     msgBuf[128+4];
    uint32_t    msgIdx;
}HASH_CTX;

extern const HASH_ALG HASH_ALG_SHA1[1];
extern const HASH_ALG HASH_ALG_SHA224[1];
extern const HASH_ALG HASH_ALG_SHA256[1];
extern const HASH_ALG HASH_ALG_MD5[1];
extern const HASH_ALG HASH_ALG_SM3[1];

/**
 * @brief  Hash init
 * @param[in] ctx pointer to HASH_CTX struct
 * @return HASH_Init_OK,  Hash init success; othets:  Hash init fail
 * @note   1.Please refer to the demo in user guidance before using this function 
 */
uint32_t HASH_Init(HASH_CTX *ctx);

/**
 * @brief  Hash start
 * @param[in] ctx pointer to HASH_CTX struct
 * @return HASH_Start_OK,  Hash start success; othets:  Hash start fail
 * @note   1.Please refer to the demo in user guidance before using this function 
 *         2.HASH_Init() should be recalled before use this function 
 */
uint32_t HASH_Start(HASH_CTX *ctx);

/**
 * @brief  Hash update
 * @param[in] ctx pointer to HASH_CTX struct
 * @param[in] in pointer to message
 * @param[out] out pointer tohash result,digest
 * @return HASH_Update_OK,  Hash update success; othets:  Hash update fail
 * @note   1.Please refer to the demo in user guidance before using this function 
 *         2.HASH_Init() and HASH_Start() should be recalled before use this function 
 */
uint32_t HASH_Update(HASH_CTX *ctx, uint8_t *in, uint32_t byteLen);

/**
 * @brief  Hash complete
 * @param[in] ctx pointer to HASH_CTX struct
 * @param[out] out pointer tohash result,digest
 * @return HASH_Complete_OK,  Hash complete success; othets:  Hash complete fail
 * @note   1.Please refer to the demo in user guidance before using this function 
 *         2.HASH_Init(), HASH_Start() and HASH_Update() should be recalled before use this function 
 */
uint32_t HASH_Complete(HASH_CTX *ctx, uint8_t *out);

/**
 * @brief  Hash close
 * @return HASH_Close_OK, Hash close success; othets: Hash close fail
 * @note   1.Please refer to the demo in user guidance before using this function  
 */
uint32_t HASH_Close(void);

/**
 * @brief  SM3 Hash for 256bits digest
 * @param[in] in pointer to message
 * @param[in] byte length of in
 * @param[out] out pointer tohash result,digest
 * @return SM3_Hash_OK, SM3 hash success; othets: SM3 hash fail
 * @note   1.Please refer to the demo in user guidance before using this function  
 */
uint32_t SM3_Hash(uint8_t* in,uint32_t byteLen, uint8_t* out);


/**
 * @brief  SHA1 Hash
 * @param[in] in pointer to message
 * @param[in] byte length of in
 * @param[out] out pointer tohash result,digest
 * @return SHA1_Hash_OK, SHA1 hash success; othets: SHA1 hash fail
 * @note   1.Please refer to the demo in user guidance before using this function  
 */
uint32_t SHA1_Hash(uint8_t* in,uint32_t byteLen, uint8_t* out);

/**
 * @brief  SHA224 Hash
 * @param[in] in pointer to message
 * @param[in] byte length of in
 * @param[out] out pointer tohash result,digest
 * @return SHA224_Hash_OK, SHA224 hash success; othets: SHA224 hash fail
 * @note   1.Please refer to the demo in user guidance before using this function  
 */
uint32_t SHA224_Hash(uint8_t* in,uint32_t byteLen, uint8_t* out);


/**
 * @brief  SHA256 Hash
 * @param[in] in pointer to message
 * @param[in] byte length of in
 * @param[out] out pointer tohash result,digest
 * @return SHA256_Hash_OK, SHA256 hash success; othets: SHA256 hash fail
 * @note   1.Please refer to the demo in user guidance before using this function  
 */
uint32_t SHA256_Hash(uint8_t* in,uint32_t byteLen, uint8_t* out);

/**
 * @brief  MD5 Hash
 * @param[in] in pointer to message
 * @param[in] byte length of in
 * @param[in] out pointer tohash result,digest
 * @return MD5_Hash_OK, MD5 hash success; othets: MD5 hash fail
 * @note   1.Please refer to the demo in user guidance before using this function  
 */
uint32_t MD5_Hash(uint8_t* in,uint32_t byteLen, uint8_t* out);

/**
 * @brief Get HASH lib version
 * @param[out] type pointer one byte type information represents the type of the lib, like Commercial version.\
 * @Bits 0~4 stands for Commercial (C), Security (S), Normal (N), Evaluation (E), Test (T), Bits 5~7 are reserved. e.g. 0x09 stands for CE version.
 * @param[out] customer pointer one byte customer information represents customer ID. for example, 0x00 stands for standard version, 0x01 is for Tianyu customized version...
 * @param[out] date pointer array which include three bytes date information. If the returned bytes are 18,9,13,this denotes September 13,2018 
 * @param[out] version pointer one byte version information represents develop version of the lib. e.g. 0x12 denotes version 1.2.
 * @return none
 * @1.You can recall this function to get RSA lib information
 */
void HASH_Version(uint8_t *type, uint8_t *customer, uint8_t date[3], uint8_t *version);


#endif
