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cc2538: aes: Add support for generic operations

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Add generic AES functions that should be able to support all the modes
of operation of the hardware AES crypto engine, i.e. ECB, CBC, CTR,
CBC-MAC, GCM, and CCM.

This makes it possible to easily implement these modes of operation
without duplicating code.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau.dev@gmail.com>
This commit is contained in:
Benoît Thébaudeau 2015-12-20 22:04:49 +01:00
parent ca919ab0b0
commit baef75752e
4 changed files with 291 additions and 341 deletions
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10
cpu/cc2538/dev/ccm.h
View file

@ -54,12 +54,6 @@
#include <stdbool.h>
#include <stdint.h>
/*---------------------------------------------------------------------------*/
/** \name AES-CCM driver return codes
* @{
*/
#define CCM_AUTHENTICATION_FAILED 7
/** @} */
/*---------------------------------------------------------------------------*/
/** \name AES-CCM functions
* @{
*/
@ -86,7 +80,7 @@ uint8_t ccm_auth_encrypt_start(uint8_t len_len, uint8_t key_area,
* \retval false Result not yet available, and no error occurred
* \retval true Result available, or error occurred
*/
uint8_t ccm_auth_encrypt_check_status(void);
#define ccm_auth_encrypt_check_status aes_auth_crypt_check_status
/** \brief Gets the result of the CCM authentication and encryption operation
* \param mic Pointer to authentication field, or \c NULL
@ -118,7 +112,7 @@ uint8_t ccm_auth_decrypt_start(uint8_t len_len, uint8_t key_area,
* \retval false Result not yet available, and no error occurred
* \retval true Result available, or error occurred
*/
uint8_t ccm_auth_decrypt_check_status(void);
#define ccm_auth_decrypt_check_status aes_auth_crypt_check_status
/** \brief Gets the result of the CCM authentication checking and decryption operation
* \param cdata Pointer to encrypted and authenticated message