AES
[Symmetric Ciphers]

Defines
#define	C4E_AES128_CTX_SIZE
#define	C4E_AES192_CTX_SIZE
#define	C4E_AES256_CTX_SIZE
#define	C4E_AES_MAX_CTX_SIZE
#define	C4E_AES128_KEY_SIZE
#define	C4E_AES192_KEY_SIZE
#define	C4E_AES256_KEY_SIZE
#define	C4E_AES_BLOCK_SIZE
Typedefs
typedef C4eArchUint8	C4eAesState
	AES state element.
Functions
void	c4e_aes_setup (C4eCipherId algo, C4E_CONST C4eArchUint8 *key, C4eAesState *ctx)
	KeyExpansion primitive according to FIPS 197, 5.2
void	c4e_aes_encrypt (C4eCipherId algo, C4eAesState *C4E_RESTRICT ctx, C4E_CONST C4eArchUint8 *C4E_RESTRICT plain, C4eArchUint8 *C4E_RESTRICT cipher)
	AES encryption algorithm according to FIPS 197.
void	c4e_aes_decrypt (C4eCipherId algo, C4eAesState *C4E_RESTRICT ctx, C4E_CONST C4eArchUint8 *C4E_RESTRICT cipher, C4eArchUint8 *C4E_RESTRICT plain)
	AES decryption algorithm according to FIPS 197.

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Define Documentation

#define C4E_AES128_CTX_SIZE

AES-128 context size in C4eAesState elements.

Definition at line 66 of file c4e_aes.h.

#define C4E_AES192_CTX_SIZE

AES-192 context size in C4eAesState elements.

Definition at line 71 of file c4e_aes.h.

#define C4E_AES256_CTX_SIZE

AES-256 context size in C4eAesState elements.

Definition at line 76 of file c4e_aes.h.

#define C4E_AES_MAX_CTX_SIZE

Maximum size of an AES context.

Definition at line 81 of file c4e_aes.h.

#define C4E_AES128_KEY_SIZE

AES-128 key size in bytes.

Definition at line 84 of file c4e_aes.h.

#define C4E_AES192_KEY_SIZE

AES-192 key size in bytes.

Definition at line 85 of file c4e_aes.h.

#define C4E_AES256_KEY_SIZE

AES-256 key size in bytes.

Definition at line 86 of file c4e_aes.h.

#define C4E_AES_BLOCK_SIZE

AES block size in bytes.

Definition at line 89 of file c4e_aes.h.

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Typedef Documentation

C4eAesState

AES state element.

This type corresponds to AES state element with 32-bit width. Without a 32-bit data type available this type holds , with in the least significant byte and in the most significant byte.

Definition at line 107 of file c4e_aes.h.

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Function Documentation

void c4e_aes_setup	(	C4eCipherId	algo,
		C4E_CONST C4eArchUint8 *	key,
		C4eAesState *	ctx
	)

KeyExpansion primitive according to FIPS 197, 5.2

Parameters:

[in]	algo	AES algorithm type (with respect to key length)
[in]	key	Key, with implicit length: C4E_AES128_KEY_SIZE byte for AES-128 C4E_AES192_KEY_SIZE byte for AES-192 C4E_AES256_KEY_SIZE byte for AES-256
[out]	ctx	Context to be supplied to c4e_aes_encrypt() or c4e_aes_decrypt().

See also:

C4E_AES128_CTX_SIZE, C4E_AES192_CTX_SIZE, C4E_AES256_CTX_SIZE, C4E_AES_MAX_CTX_SIZE

void c4e_aes_encrypt	(	C4eCipherId	algo,
		C4eAesState *C4E_RESTRICT	ctx,
		C4E_CONST C4eArchUint8 *C4E_RESTRICT	plain,
		C4eArchUint8 *C4E_RESTRICT	cipher
	)

AES encryption algorithm according to FIPS 197.

Precondition:

c4e_aes_setup()

Bibliography:

Advanced Encryption Standard (AES). FIPS Publication 197, National Institute of Standards and Technology, 2001.

Parameters:

[in]	algo	One of the AES algorithm identifiers.
[in,out]	ctx	Context as prepared by c4e_aes_setup()
[in]	plain	Pointer to plaintext block of C4E_AES_BLOCK_SIZE bytes
[out]	cipher	Pointer to memory buffer of C4E_AES_BLOCK_SIZE bytes, which gets the ciphertext block.

void c4e_aes_decrypt	(	C4eCipherId	algo,
		C4eAesState *C4E_RESTRICT	ctx,
		C4E_CONST C4eArchUint8 *C4E_RESTRICT	cipher,
		C4eArchUint8 *C4E_RESTRICT	plain
	)

AES decryption algorithm according to FIPS 197.

Precondition:

c4e_aes_setup()

Bibliography:

Advanced Encryption Standard (AES). FIPS Publication 197, National Institute of Standards and Technology, 2001.

Parameters:

[in]	algo	One of the AES algorithm identifiers.
[in,out]	ctx	Context as prepared by c4e_aes_setup()
[in]	cipher	Pointer to ciphertext block of C4E_AES_BLOCK_SIZE bytes
[out]	plain	Pointer to memory buffer of C4E_AES_BLOCK_SIZE bytes, which gets the plaintext block.