/*---------------------------------------------------------------------------*/
void
adaptivesec_aead(uint8_t *key, int shall_encrypt, uint8_t *result, int forward)
{
uint8_t nonce[CCM_STAR_NONCE_LENGTH];
uint8_t *m;
uint8_t m_len;
uint8_t *a;
uint8_t a_len;
ccm_star_packetbuf_set_nonce(nonce, forward);
a = packetbuf_hdrptr();
if(shall_encrypt) {
#if AKES_NBR_WITH_GROUP_KEYS && PACKETBUF_WITH_UNENCRYPTED_BYTES
a_len = packetbuf_hdrlen() + packetbuf_attr(PACKETBUF_ATTR_UNENCRYPTED_BYTES);
#else /* AKES_NBR_WITH_GROUP_KEYS && PACKETBUF_WITH_UNENCRYPTED_BYTES */
a_len = packetbuf_hdrlen();
#endif /* AKES_NBR_WITH_GROUP_KEYS && PACKETBUF_WITH_UNENCRYPTED_BYTES */
m = a + a_len;
m_len = packetbuf_totlen() - a_len;
} else {
a_len = packetbuf_totlen();
m = NULL;
m_len = 0;
}
AES_128_GET_LOCK();
ADAPTIVESEC_SET_KEY(key);
CCM_STAR.aead(nonce,
m, m_len,
a, a_len,
result, adaptivesec_mic_len(),
forward);
AES_128_RELEASE_LOCK();
}
/*---------------------------------------------------------------------------*/
static int
aead(uint8_t hdrlen, int forward)
{
uint8_t totlen;
uint8_t nonce[CCM_STAR_NONCE_LENGTH];
uint8_t *m;
uint8_t m_len;
uint8_t *a;
uint8_t a_len;
uint8_t *result;
uint8_t generated_mic[MIC_LEN];
uint8_t *mic;
ccm_star_packetbuf_set_nonce(nonce, forward);
totlen = packetbuf_totlen();
a = packetbuf_hdrptr();
#if WITH_ENCRYPTION
a_len = hdrlen;
m = a + a_len;
m_len = totlen - hdrlen;
#else /* WITH_ENCRYPTION */
a_len = totlen;
m = NULL;
m_len = 0;
#endif /* WITH_ENCRYPTION */
mic = a + totlen;
result = forward ? mic : generated_mic;
CCM_STAR.aead(nonce,
m, m_len,
a, a_len,
result, MIC_LEN,
forward);
if(forward) {
packetbuf_set_datalen(packetbuf_datalen() + MIC_LEN);
return 1;
} else {
return (memcmp(generated_mic, mic, MIC_LEN) == 0);
}
}