twr_aes

Driver for AES. More...

Macros
#define	TWR_AES_KEYLEN   128
#define	TWR_AES_IVLEN   128

Typedefs
typedef uint32_t	twr_aes_key_t[TWR_AES_KEYLEN/8/4]
	AES 128-bit Key.
typedef uint32_t	twr_aes_iv_t[TWR_AES_IVLEN/8/4]
	AES 128-bit Initialization vector.

Functions
void	twr_aes_init (void)
	Initialize AES.
bool	twr_aes_key_derivation (twr_aes_key_t decryption_key, const twr_aes_key_t key)
	AES derivation decryption key from encryption key. More...
bool	twr_aes_ecb_encrypt (void *buffer_out, const void *buffer_in, const size_t length, const twr_aes_key_t key)
	AES encryption Electronic CodeBook (ECB) More...
bool	twr_aes_ecb_decrypt (void *buffer_out, const void *buffer_in, size_t length, twr_aes_key_t key)
	AES decryption Electronic CodeBook (ECB) More...
bool	twr_aes_ctwr_encrypt (void *buffer_out, const void *buffer_in, size_t length, twr_aes_key_t key, twr_aes_iv_t iv)
	AES Cipher block chaining (CBC) More...
bool	twr_aes_ctwr_decrypt (void *buffer_out, const void *buffer_in, size_t length, twr_aes_key_t key, twr_aes_iv_t iv)
	AES Cipher block chaining (CBC) More...
void	twr_aes_key_from_uint8 (twr_aes_key_t key, const uint8_t *buffer)
	Create key from uint8 array. More...
void	twr_aes_iv_from_uint8 (twr_aes_iv_t iv, const uint8_t *buffer)
	Create Initialization vector from uint8 array. More...

Detailed Description

Driver for AES.

Function Documentation

twr_aes_ctwr_decrypt()

bool twr_aes_ctwr_decrypt	(	void *	buffer_out,
		const void *	buffer_in,
		size_t	length,
		twr_aes_key_t	key,
		twr_aes_iv_t	iv
	)

AES Cipher block chaining (CBC)

Parameters

[out]	buffer_out	Pointer to destination buffer
[in]	buffer_in	Pointer to source buffer
[in]	length	Number of bytes
[in]	key	128-bit decryption key
[in]	iv	128-bit Initialization vector

Returns

true On success

false On failure

Definition at line 96 of file twr_aes.c.

twr_aes_ctwr_encrypt()

bool twr_aes_ctwr_encrypt	(	void *	buffer_out,
		const void *	buffer_in,
		size_t	length,
		twr_aes_key_t	key,
		twr_aes_iv_t	iv
	)

AES Cipher block chaining (CBC)

Parameters

[out]	buffer_out	Pointer to destination buffer
[in]	buffer_in	Pointer to source buffer
[in]	length	Number of bytes
[in]	key	128-bit encryption key
[in]	iv	128-bit Initialization vector

Returns

true On success

false On failure

Definition at line 80 of file twr_aes.c.

twr_aes_ecb_decrypt()

bool twr_aes_ecb_decrypt	(	void *	buffer_out,
		const void *	buffer_in,
		size_t	length,
		twr_aes_key_t	key
	)

AES decryption Electronic CodeBook (ECB)

Parameters

[out]	buffer_out	Pointer to destination buffer
[in]	buffer_in	Pointer to source buffer
[in]	length	Number of bytes
[in]	key	128-bit decryption key

Returns

true On success

false On failure

Definition at line 66 of file twr_aes.c.

twr_aes_ecb_encrypt()

bool twr_aes_ecb_encrypt	(	void *	buffer_out,
		const void *	buffer_in,
		const size_t	length,
		const twr_aes_key_t	key
	)

AES encryption Electronic CodeBook (ECB)

Parameters

[out]	buffer_out	Pointer to destination buffer
[in]	buffer_in	Pointer to source buffer
[in]	length	Number of bytes
[in]	key	128-bit encryption key

Returns

true On success

false On failure

Definition at line 52 of file twr_aes.c.

twr_aes_iv_from_uint8()

void twr_aes_iv_from_uint8	(	twr_aes_iv_t	iv,
		const uint8_t *	buffer
	)

Create Initialization vector from uint8 array.

Parameters

[out]	iv	128-bit Initialization vector
[in]	buffer	Pointer to source buffer

Definition at line 122 of file twr_aes.c.

twr_aes_key_derivation()

bool twr_aes_key_derivation	(	twr_aes_key_t	decryption_key,
		const twr_aes_key_t	key
	)

AES derivation decryption key from encryption key.

Parameters

[out]	key	128-bit decryption key
[in]	key	128-bit encryption key

Returns

true On success

false On failure

Definition at line 19 of file twr_aes.c.

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twr_aes_key_from_uint8()

void twr_aes_key_from_uint8	(	twr_aes_key_t	key,
		const uint8_t *	buffer
	)

Create key from uint8 array.

Parameters

[out]	key	key 128-bit encryption key
[in]	buffer	Pointer to source buffer

Definition at line 112 of file twr_aes.c.