Accelerated AES Block Cipher
Cryptography Hardware Acceleration Plugins > Silicon Labs Cryptography Hardware Acceleration Plugins for mbed TLS

Detailed Description

Accelerated AES block cipher for the mbed TLS API using the AES, CRYPTO, CRYPTOACC or SE peripheral.

Data Structures

struct  mbedtls_aes_context
 AES context structure.
 

Functions

void mbedtls_aes_init (mbedtls_aes_context *ctx)
 Initialize AES context.
 
void mbedtls_aes_free (mbedtls_aes_context *ctx)
 Clear AES context.
 
int mbedtls_aes_setkey_enc (mbedtls_aes_context *ctx, const unsigned char *key, unsigned int keybits)
 AES key schedule (encryption)
 
int mbedtls_aes_setkey_dec (mbedtls_aes_context *ctx, const unsigned char *key, unsigned int keybits)
 AES key schedule (decryption)
 
int mbedtls_aes_crypt_ecb (mbedtls_aes_context *ctx, int mode, const unsigned char input[16], unsigned char output[16])
 AES-ECB block encryption/decryption.
 
int mbedtls_internal_aes_encrypt (mbedtls_aes_context *ctx, const unsigned char input[16], unsigned char output[16])
 Internal AES block encryption function (Only exposed to allow overriding it, see MBEDTLS_AES_ENCRYPT_ALT)
 
int mbedtls_internal_aes_decrypt (mbedtls_aes_context *ctx, const unsigned char input[16], unsigned char output[16])
 Internal AES block decryption function (Only exposed to allow overriding it, see MBEDTLS_AES_DECRYPT_ALT)
 

Function Documentation

int mbedtls_aes_crypt_ecb ( mbedtls_aes_context *  ctx,
int  mode,
const unsigned char  input[16],
unsigned char  output[16] 
)

AES-ECB block encryption/decryption.

Parameters
ctxAES context
modeMBEDTLS_AES_ENCRYPT or MBEDTLS_AES_DECRYPT
input16-byte input block
output16-byte output block
Returns
0 if successful
void mbedtls_aes_free ( mbedtls_aes_context *  ctx)

Clear AES context.

Parameters
ctxAES context to be cleared
void mbedtls_aes_init ( mbedtls_aes_context *  ctx)

Initialize AES context.

Parameters
ctxAES context to be initialized
int mbedtls_aes_setkey_dec ( mbedtls_aes_context *  ctx,
const unsigned char *  key,
unsigned int  keybits 
)

AES key schedule (decryption)

Parameters
ctxAES context to be initialized
keydecryption key
keybitsmust be 128, 192 or 256
Returns
0 if successful, or MBEDTLS_ERR_AES_INVALID_KEY_LENGTH
int mbedtls_aes_setkey_enc ( mbedtls_aes_context *  ctx,
const unsigned char *  key,
unsigned int  keybits 
)

AES key schedule (encryption)

Parameters
ctxAES context to be initialized
keyencryption key
keybitsmust be 128, 192 or 256
Returns
0 if successful, or MBEDTLS_ERR_AES_INVALID_KEY_LENGTH
int mbedtls_internal_aes_decrypt ( mbedtls_aes_context *  ctx,
const unsigned char  input[16],
unsigned char  output[16] 
)

Internal AES block decryption function (Only exposed to allow overriding it, see MBEDTLS_AES_DECRYPT_ALT)

Parameters
ctxAES context
inputCiphertext block
outputOutput (plaintext) block
Returns
0 if successful
int mbedtls_internal_aes_encrypt ( mbedtls_aes_context *  ctx,
const unsigned char  input[16],
unsigned char  output[16] 
)

Internal AES block encryption function (Only exposed to allow overriding it, see MBEDTLS_AES_ENCRYPT_ALT)

Parameters
ctxAES context
inputPlaintext block
outputOutput (ciphertext) block
Returns
0 if successful