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sm: introduce sm_passkey_entry

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This commit is contained in:
Matthias Ringwald 2018-04-04 22:34:29 +02:00
parent 7edd4211b0
commit 22cda2e10c
1 changed files with 22 additions and 3 deletions
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25
src/ble/sm.c
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@ -413,6 +413,7 @@ static void sm_handle_random_result_rau(void * arg);
static void sm_handle_random_result_sc_get_random(void * arg);
#endif
static void sm_notify_client_status_reason(sm_connection_t * sm_conn, uint8_t status, uint8_t reason);
static int sm_passkey_entry(stk_generation_method_t method);
static void log_info_hex16(const char * name, uint16_t value){
log_info("%-6s 0x%04x", name, value);
@ -1443,6 +1444,7 @@ static const uint8_t f5_key_id[] = { 0x62, 0x74, 0x6c, 0x65 };
static const uint8_t f5_length[] = { 0x01, 0x00};
static void f5_calculate_salt(sm_connection_t * sm_conn){
log_info("f5_calculate_salt");
// calculate salt for f5
const uint16_t message_len = 32;
sm_cmac_connection = sm_conn;
@ -1548,7 +1550,7 @@ static void g2_calculate(sm_connection_t * sm_conn) {
static void sm_sc_calculate_local_confirm(sm_connection_t * sm_conn){
uint8_t z = 0;
if (setup->sm_stk_generation_method != JUST_WORKS && setup->sm_stk_generation_method != NK_BOTH_INPUT){
if (sm_passkey_entry(setup->sm_stk_generation_method)){
// some form of passkey
uint32_t pk = big_endian_read_32(setup->sm_tk, 12);
z = 0x80 | ((pk >> setup->sm_passkey_bit) & 1);
@ -1569,7 +1571,7 @@ static void sm_sc_calculate_remote_confirm(sm_connection_t * sm_conn){
}
uint8_t z = 0;
if (setup->sm_stk_generation_method != JUST_WORKS && setup->sm_stk_generation_method != NK_BOTH_INPUT){
if (sm_passkey_entry(setup->sm_stk_generation_method)){
// some form of passkey
uint32_t pk = big_endian_read_32(setup->sm_tk, 12);
// sm_passkey_bit was increased before sending confirm value
@ -2237,7 +2239,9 @@ static void sm_run(void){
uint8_t buffer[17];
buffer[0] = SM_CODE_PAIRING_RANDOM;
reverse_128(setup->sm_local_nonce, &buffer[1]);
if (setup->sm_stk_generation_method != JUST_WORKS && setup->sm_stk_generation_method != NK_BOTH_INPUT && setup->sm_passkey_bit < 20){
log_info("stk method %u, num bits %u", setup->sm_stk_generation_method, setup->sm_passkey_bit);
if (sm_passkey_entry(setup->sm_stk_generation_method) && setup->sm_passkey_bit < 20){
log_info("SM_SC_SEND_PAIRING_RANDOM A");
if (IS_RESPONDER(connection->sm_role)){
// responder
connection->sm_engine_state = SM_SC_W4_CONFIRMATION;
@ -2246,11 +2250,14 @@ static void sm_run(void){
connection->sm_engine_state = SM_SC_W4_PAIRING_RANDOM;
}
} else {
log_info("SM_SC_SEND_PAIRING_RANDOM B");
if (IS_RESPONDER(connection->sm_role)){
// responder
if (setup->sm_stk_generation_method == NK_BOTH_INPUT){
log_info("SM_SC_SEND_PAIRING_RANDOM B1");
connection->sm_engine_state = SM_SC_W2_CALCULATE_G2;
} else {
log_info("SM_SC_SEND_PAIRING_RANDOM B2");
sm_sc_prepare_dhkey_check(connection);
}
} else {
@ -3061,6 +3068,18 @@ static int sm_passkey_used(stk_generation_method_t method){
return 0;
}
}
static int sm_passkey_entry(stk_generation_method_t method){
switch (method){
case PK_RESP_INPUT:
case PK_INIT_INPUT:
case OK_BOTH_INPUT:
return 1;
default:
return 0;
}
}
#endif
/**