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sm: use LE Random for initiator/jw_nk

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This commit is contained in:
Matthias Ringwald 2016-05-29 20:22:11 +02:00
parent 945888f5ea
commit f1c1783e41
2 changed files with 36 additions and 4 deletions
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36
src/ble/sm.c
View File

@ -1317,6 +1317,7 @@ static inline void sm_pdu_received_in_wrong_state(sm_connection_t * sm_conn){
static void sm_sc_prepare_dhkey_check(sm_connection_t * sm_conn);
static int sm_passkey_used(stk_generation_method_t method);
static int sm_just_works_or_numeric_comparison(stk_generation_method_t method);
static void sm_sc_state_after_receiving_random(sm_connection_t * sm_conn){
if (sm_conn->sm_role){
@ -1937,6 +1938,16 @@ static void sm_run(void){
}
#ifdef ENABLE_LE_SECURE_CONNECTIONS
case SM_SC_W2_GET_RANDOM_A:
sm_random_start(connection);
connection->sm_engine_state = SM_SC_W4_GET_RANDOM_A;
break;
case SM_SC_W2_GET_RANDOM_B:
sm_random_start(connection);
connection->sm_engine_state = SM_SC_W4_GET_RANDOM_B;
break;
case SM_SC_W2_CMAC_FOR_CONFIRMATION:
if (!sm_cmac_ready()) break;
@ -2604,6 +2615,24 @@ static void sm_handle_random_result(uint8_t * data){
sm_connection_t * connection = (sm_connection_t *) sm_random_context;
if (!connection) return;
switch (connection->sm_engine_state){
#ifdef ENABLE_LE_SECURE_CONNECTIONS
case SM_SC_W4_GET_RANDOM_A:
memcpy(&setup->sm_local_nonce[0], data, 8);
connection->sm_engine_state = SM_SC_W2_GET_RANDOM_B;
break;
case SM_SC_W4_GET_RANDOM_B:
memcpy(&setup->sm_local_nonce[8], data, 8);
// TODO: next state
// initiator & jw/nc -> send pairing random
if (connection->sm_role == 0 && sm_just_works_or_numeric_comparison(setup->sm_stk_generation_method)){
connection->sm_engine_state = SM_SC_SEND_PAIRING_RANDOM;
break;
}
log_error("SM_SC_W4_GET_RANDOM_B: next state not defined");
break;
#endif
case SM_PH2_W4_RANDOM_TK:
{
// map random to 0-999999 without speding much cycles on a modulus operation
@ -3107,12 +3136,11 @@ static void sm_pdu_handler(uint8_t packet_type, hci_con_handle_t con_handle, uin
sm_conn->sm_engine_state = SM_SC_W2_CMAC_FOR_CONFIRMATION;
} else {
// initiator
if (sm_just_works_or_numeric_comparison(setup->sm_stk_generation_method)){
sm_sc_generate_local_nonce(sm_conn);
sm_conn->sm_engine_state = SM_SC_W2_GET_RANDOM_A;
} else {
sm_conn->sm_engine_state = SM_SC_SEND_PAIRING_RANDOM;
}
sm_conn->sm_engine_state = SM_SC_SEND_PAIRING_RANDOM;
}
break;

4
src/hci.h
View File

@ -305,6 +305,10 @@ typedef enum {
// LE Secure Connections
SM_SC_SEND_PUBLIC_KEY_COMMAND,
SM_SC_W4_PUBLIC_KEY_COMMAND,
SM_SC_W2_GET_RANDOM_A,
SM_SC_W4_GET_RANDOM_A,
SM_SC_W2_GET_RANDOM_B,
SM_SC_W4_GET_RANDOM_B,
SM_SC_W2_CMAC_FOR_CONFIRMATION,
SM_SC_W4_CMAC_FOR_CONFIRMATION,
SM_SC_SEND_CONFIRMATION,