2.4.1.3 Crypto_Sym_AesXts_Cipher

crypto_Sym_Status_E Crypto_Sym_AesXts_Cipher(
    st_Crypto_Sym_BlockCtx *ptr_aesCtx_st,
    uint8_t *ptr_inputData, 
    uint32_t dataLen, 
    uint8_t *ptr_outData, 
    uint8_t *ptr_tweak
    );

Description

This API performs AES encryption or decryption only for XTS Mode. Initialize context by calling Crypto_Sym_Aes_Init function before calling this API.

Parameters


No.	Argument Type	Argument Name	Type	Description
1	st_Crypto_Sym_BlockCtx*	ptr_aesCtx_st	Input	AES algorithm context
2	uint8_t*	ptr_inputData	Input	Input data to encrypt or decrypt
3	uint32_t	dataLen	Input	Input length of plain data or cipher data in bytes
4	uint8_t*	ptr_outData	Output	Pointer to store cipher text/plain text as output
5	uint8_t*	ptr_tweak	Input	Pointer for the tweak value

Returns


Return Type	Description
crypto_Sym_Status_E	Function returns the status of the API.

Example

#define sessionID 1
crypto_Sym_Status_E status;
st_Crypto_Sym_BlockCtx  aesCtx_st;
crypto_HandlerType_E handlerType_en = CRYPTO_HANDLER_HW_INTERNAL;
crypto_CipherOper_E cipherOpType_en = CRYPTO_CIOP_ENCRYPT;
crypto_Sym_OpModes_E opMode_en = CRYPTO_SYM_OPMODE_XTS;
uint8_t key[16] = {/*data*/};
uint32_t keyLen = sizeof(key);
uint8_t *ptr_initVect = NULL;
uint8_t inputData[64] = {/*data*/};
uint32_t dataLen = sizeof(inputData);
uint8_t outData[64];
uint8_t ptr_tweak[] = {/*data*/};

status = Crypto_Sym_Aes_Init(
    &aesCtx_st,
    handlerType_en,
    cipherOpType_en,
    opMode_en,
    key,
    keyLen,
    ptr_initVect,
    sessionID
);



status = Crypto_Sym_AesXts_Cipher(
    &aesCtx_st,
    inputData, 
    dataLen, 
    outData, 
    ptr_tweak
    );