Cipher : DES

Software implementation of the DES algorithm. More...

Collaboration diagram for Cipher : DES:

Modules
	Internals
	Software implementation of the DES algorithm.

Functions
phStatus_t	phCryptoSym_Sw_Des_DecryptBlock (phCryptoSym_Sw_DataParams_t *pDataParams, uint8_t PH_CRYTOSYM_SW_FAST_RAM *pBlock, uint8_t bKeyNumber)
	Performs a decryption of a DES Block (8 byte) using a DES Key. More...
phStatus_t	phCryptoSym_Sw_Des_EncryptBlock (phCryptoSym_Sw_DataParams_t *pDataParams, uint8_t PH_CRYTOSYM_SW_FAST_RAM *pBlock, uint8_t bKeyNumber)
	Performs an encryption of a DES Block (8 byte) using a DES Key. More...
phStatus_t	phCryptoSym_Sw_Des_KeyInit (phCryptoSym_Sw_DataParams_t *pDataParams, const uint8_t *pKey, uint8_t bNumKeys)
	Performs the key Expansion of the DES key(s) According to the number of keys specified, the pDataParams key array is filled up in the following sequence: Expanded KEY1 [128] || Expanded KEY2 [128] || Expanded KEY3 [128]. More...
phStatus_t	phCryptoSym_Sw_Des_DecodeVersion (uint8_t *pKey, uint16_t *pKeyVersion)
	Decode the KeyVersion of a DES key. More...
phStatus_t	phCryptoSym_Sw_Des_EncodeVersion (uint8_t *pKey, uint16_t wKeyVersion, uint16_t wKeyType, uint8_t *pEncodedKey)
	Encode the KeyVersion in a DES key. More...

Detailed Description

Software implementation of the DES algorithm.

Function Documentation

phCryptoSym_Sw_Des_DecryptBlock()

phStatus_t phCryptoSym_Sw_Des_DecryptBlock	(	phCryptoSym_Sw_DataParams_t *	pDataParams,
		uint8_t PH_CRYTOSYM_SW_FAST_RAM *	pBlock,
		uint8_t	bKeyNumber
	)

Performs a decryption of a DES Block (8 byte) using a DES Key.

The key needs to be provided in the pDataParams structure. By specifying the bKeyNumber, either the first, the second or the third key is used.

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]	bKeyNumber	[In] Number of the key to be used (0, 1 or 2)

phCryptoSym_Sw_Des_EncryptBlock()

phStatus_t phCryptoSym_Sw_Des_EncryptBlock	(	phCryptoSym_Sw_DataParams_t *	pDataParams,
		uint8_t PH_CRYTOSYM_SW_FAST_RAM *	pBlock,
		uint8_t	bKeyNumber
	)

Performs an encryption of a DES Block (8 byte) using a DES Key.

The key needs to be provided in the pDataParams structure. By specifying the bKeyNumber, either the first, the second or the third key is used.

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]	bKeyNumber	[In] Number of the key to be used (0, 1 or 2)

phCryptoSym_Sw_Des_KeyInit()

phStatus_t phCryptoSym_Sw_Des_KeyInit	(	phCryptoSym_Sw_DataParams_t *	pDataParams,
		const uint8_t *	pKey,
		uint8_t	bNumKeys
	)

Performs the key Expansion of the DES key(s) According to the number of keys specified, the pDataParams key array is filled up in the following sequence: Expanded KEY1 [128] || Expanded KEY2 [128] || Expanded KEY3 [128].

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 DES engine.
[in]	bNumKeys	[In] Amount of keys provided (1, 2 or 3)

phCryptoSym_Sw_Des_DecodeVersion()

phStatus_t phCryptoSym_Sw_Des_DecodeVersion	(	uint8_t *	pKey,
		uint16_t *	pKeyVersion
	)

Decode the KeyVersion of a DES key.

Returns

Status code

Return values

PH_ERR_SUCCESS	Operation successful.
Other	Depending on implementation and underlaying component.

Parameters

[in]	pKey	[In] Key to decode.
[out]	pKeyVersion	[Out] Version of the key.

phCryptoSym_Sw_Des_EncodeVersion()

phStatus_t phCryptoSym_Sw_Des_EncodeVersion	(	uint8_t *	pKey,
		uint16_t	wKeyVersion,
		uint16_t	wKeyType,
		uint8_t *	pEncodedKey
	)

Encode the KeyVersion in a DES key.

Returns

Status code

Return values

PH_ERR_SUCCESS	Operation successful.
PH_ERR_INVALID_PARAMETER	Operation aborted.
Other	Depending on implementation and underlaying component.

Parameters

[in]	pKey	[In] Key to encode.
[in]	wKeyVersion	[In] Version of the key.
[in]	wKeyType	[In] Type of Key.
[out]	pEncodedKey	[Out] Encoded key.