Cipher : AES

Software implementation of the AES algorithm. More...

Collaboration diagram for Cipher : AES:

Modules
	Internals
	Software implementation of the AES algorithm.

Functions
phStatus_t	phCryptoSym_Sw_Aes_KeyExpansion (phCryptoSym_Sw_DataParams_t *pDataParams, const uint8_t *pKey, uint8_t bNkCurrent, uint8_t bNkMax)
	Performs the key Expansion of the AES key (128, 192, 256 bits). More...
phStatus_t	phCryptoSym_Sw_Aes_EncryptBlock (phCryptoSym_Sw_DataParams_t *pDataParams, uint8_t PH_CRYTOSYM_SW_FAST_RAM *pBlock, uint8_t bNumRounds)
	Performs a encryption of an AES Block (16 byte) using an AES Key. More...
phStatus_t	phCryptoSym_Sw_Aes_DecryptBlock (phCryptoSym_Sw_DataParams_t *pDataParams, uint8_t PH_CRYTOSYM_SW_FAST_RAM *pBlock, uint8_t bNumRounds)
	Performs a decryption of an AES Block (16 byte) using an AES Key. More...

Detailed Description

Software implementation of the AES algorithm.

Function Documentation

phCryptoSym_Sw_Aes_KeyExpansion()

phStatus_t phCryptoSym_Sw_Aes_KeyExpansion	(	phCryptoSym_Sw_DataParams_t *	pDataParams,
		const uint8_t *	pKey,
		uint8_t	bNkCurrent,
		uint8_t	bNkMax
	)

Performs the key Expansion of the AES key (128, 192, 256 bits).

According to the size of the key specified, the pDataParams key array is filled up in the following sequence: pKey || pRk1 ..... ||pRkN

Returns

Status code

Return values

PH_ERR_SUCCESS

Operation successful.

Parameters

[in]	pDataParams	[In] Pointer to this layers parameter structure.
[in]	pKey	[In] Key array to be loaded into the AES engine.
[in]	bNkCurrent	[In] Size of the key provided (in 32 bit granularity).
[in]	bNkMax	[In] Total amount of 32 bit Values to be loaded.

phCryptoSym_Sw_Aes_EncryptBlock()

phStatus_t phCryptoSym_Sw_Aes_EncryptBlock	(	phCryptoSym_Sw_DataParams_t *	pDataParams,
		uint8_t PH_CRYTOSYM_SW_FAST_RAM *	pBlock,
		uint8_t	bNumRounds
	)

Performs a encryption of an AES Block (16 byte) using an AES Key.

The key needs to be provided in the pDataParams structure. By specifying the bNumRounds, the amount of AES rounds to be executed is defined.

Returns

Status code

Return values

PH_ERR_SUCCESS

Operation successful.

Parameters

[in]	pDataParams	[In] Pointer to this layers parameter structure.
[in,out]	pBlock	[InOut] Block to be enciphered in place.
[in]	bNumRounds	[In] Number of rounds according to AES algorithm.

phCryptoSym_Sw_Aes_DecryptBlock()

phStatus_t phCryptoSym_Sw_Aes_DecryptBlock	(	phCryptoSym_Sw_DataParams_t *	pDataParams,
		uint8_t PH_CRYTOSYM_SW_FAST_RAM *	pBlock,
		uint8_t	bNumRounds
	)

Performs a decryption of an AES Block (16 byte) using an AES Key.

The key needs to be provided in the pDataParams structure. By specifying the bNumRounds, the amount of AES rounds to be executed is defined.

Returns

Status code

Return values

PH_ERR_SUCCESS

Operation successful.

Parameters

[in]	pDataParams	[In] Pointer to this layers parameter structure.
[in,out]	pBlock	[InOut] Block to be deciphered in place.
[in]	bNumRounds	[In] Number of rounds according to AES algorithm.