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llsec: Added AEAD mode to CCM*

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This commit is contained in:
Konrad Krentz 2015-07-15 06:11:42 -07:00 • committed by kkrentz
parent c656a4d1c5
commit 0a6b1cb646
7 changed files with 116 additions and 108 deletions
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50
core/net/llsec/ccm-star-packetbuf.c
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@ -39,7 +39,7 @@
*/
#include "llsec/ccm-star-packetbuf.h"
#include "lib/ccm-star.h"
#include "net/linkaddr.h"
#include "net/packetbuf.h"
#include <string.h>
@ -62,10 +62,12 @@ get_extended_address(const linkaddr_t *addr)
}
#endif /* LINKADDR_SIZE == 2 */
/*---------------------------------------------------------------------------*/
/* Inits the 13-byte CCM* nonce as of 802.15.4-2011. */
static void
set_nonce(uint8_t *nonce, const linkaddr_t *source_addr)
void
ccm_star_packetbuf_set_nonce(uint8_t *nonce, int forward)
{
const linkaddr_t *source_addr;
source_addr = forward ? &linkaddr_node_addr : packetbuf_addr(PACKETBUF_ADDR_SENDER);
memcpy(nonce, get_extended_address(source_addr), 8);
nonce[8] = packetbuf_attr(PACKETBUF_ATTR_FRAME_COUNTER_BYTES_2_3) >> 8;
nonce[9] = packetbuf_attr(PACKETBUF_ATTR_FRAME_COUNTER_BYTES_2_3) & 0xff;
@ -74,43 +76,3 @@ set_nonce(uint8_t *nonce, const linkaddr_t *source_addr)
nonce[12] = packetbuf_attr(PACKETBUF_ATTR_SECURITY_LEVEL);
}
/*---------------------------------------------------------------------------*/
void
ccm_star_packetbuf_mic(const linkaddr_t *source_addr,
uint8_t *result,
uint8_t mic_len)
{
uint8_t nonce[CCM_STAR_NONCE_LENGTH];
uint8_t *m;
uint8_t m_len;
uint8_t *a;
uint8_t a_len;
set_nonce(nonce, source_addr);
a = packetbuf_hdrptr();
if(packetbuf_attr(PACKETBUF_ATTR_SECURITY_LEVEL) & (1 << 2)) {
m = packetbuf_dataptr();
m_len = packetbuf_datalen();
a_len = packetbuf_hdrlen();
} else {
m = NULL;
m_len = 0;
a_len = packetbuf_totlen();
}
CCM_STAR.mic(nonce,
m, m_len,
a, a_len,
result,
mic_len);
}
/*---------------------------------------------------------------------------*/
void
ccm_star_packetbuf_ctr(const linkaddr_t *source_addr)
{
uint8_t nonce[CCM_STAR_NONCE_LENGTH];
set_nonce(nonce, source_addr);
CCM_STAR.ctr(nonce, packetbuf_dataptr(), packetbuf_datalen());
}
/*---------------------------------------------------------------------------*/