AES Block Cipher

Description

Interface to the block cipher defined in FIPS-197.

Functions
void	MODA_AES_Init (struct aes_ctxt *aes, enum aes_key_size keySize, const uint8_t *key)
	Initialise an AES block cipher by expanding a key. More...
void	MODA_AES_Encrypt (const struct aes_ctxt *aes, uint8_t *s)
	Encrypt a block of memory called state. More...
void	MODA_AES_Decrypt (const struct aes_ctxt *aes, uint8_t *s)
	Decrypt a block of memory called state. More...

Data Structures
struct	aes_ctxt
	Stores the expanded key. More...

Macros
#define	AES_BLOCK_SIZE   16U
	block cipher block size in bytes

Enumerations
enum	aes_key_size { AES_KEY_128 = 16U, AES_KEY_192 = 24U, AES_KEY_256 = 32U }
	Supported key sizes. More...

---

Data Structure Documentation

struct aes_ctxt

Stores the expanded key.

Examples:

test_aes.c, test_aes_cmac.c, test_aes_gcm.c, and test_aes_wrap.c.

Data Fields
uint8_t	k[240U]	expanded key
uint8_t	r	number of rounds

Enumeration Type Documentation

enum aes_key_size

Supported key sizes.

Enumerator
AES_KEY_128	AES-128.
AES_KEY_192	AES-198.
AES_KEY_256	AES-256.

Function Documentation

void MODA_AES_Decrypt	(	const struct aes_ctxt *	aes,
		uint8_t *	s
	)

Decrypt a block of memory called state.

Parameters

[in]	aes	expanded key
[in]	s	pointer to AES_BLOCK_SIZE bytes of state (any alignment)

Examples:

test_aes.c.

void MODA_AES_Encrypt	(	const struct aes_ctxt *	aes,
		uint8_t *	s
	)

Encrypt a block of memory called state.

Parameters

[in]	aes	expanded key
[in]	s	pointer to AES_BLOCK_SIZE bytes of state (any alignment)

Examples:

test_aes.c.

void MODA_AES_Init	(	struct aes_ctxt *	aes,
		enum aes_key_size	keySize,
		const uint8_t *	key
	)

Initialise an AES block cipher by expanding a key.

Parameters

[in]	aes	expanded key
[in]	keySize	enumerated size of key
[in]	key	pointer to the key (any alignment)

Examples:

test_aes.c, test_aes_cmac.c, test_aes_gcm.c, and test_aes_wrap.c.