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https://github.com/bluekitchen/btstack.git
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send c1 and random, calculation not correct yet
This commit is contained in:
matthias.ringwald
parent
6d85ed58f1
commit
71e40bc615
92
ble/sm.c
92
ble/sm.c
@ -56,22 +56,25 @@ typedef enum {
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SM_STATE_SEND_LTK_REQUESTED_NEGATIVE_REPLY,
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SM_STATE_TIMEOUT, // no other security messages are exchanged
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// get random number for TK if we show it
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// get random number for use as TK Passkey if we show it
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SM_STATE_PH2_GET_RANDOM_TK,
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SM_STATE_PH2_W4_RANDOM_TK,
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// get local random number for confirm
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// get local random number for confirm c1
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SM_STATE_PH2_C1_GET_RANDOM_A,
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SM_STATE_PH2_C1_W4_RANDOM_A,
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SM_STATE_PH2_C1_GET_RANDOM_B,
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SM_STATE_PH2_C1_W4_RANDOM_B,
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// calculate confirm c1
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SM_STATE_PH2_C1_GET_ENC_A,
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SM_STATE_PH2_C1_W4_ENC_A,
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SM_STATE_PH2_C1_GET_ENC_B,
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SM_STATE_PH2_C1_W4_ENC_B,
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// SLAVE ROLE
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SM_STATE_PH2_SEND_PAIRING_RANDOM,
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// RESPONDER ROLE
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SM_STATE_SEND_SECURITY_REQUEST,
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@ -82,11 +85,9 @@ typedef enum {
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SM_STATE_PH1_W4_PAIRING_CONFIRM,
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SM_STATE_PH1_W4_USER_RESPONSE,
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SM_STATE_SEND_PAIRING_RANDOM,
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// Phase 2: Authenticating and Encrypting
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// calculate confirm values for local and remote connection
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// calculate confirm values for remote connection
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SM_STATE_PH2_C1_SEND_PAIRING_CONFIRM,
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SM_STATE_PH2_W4_PAIRING_RANDOM,
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SM_STATE_PH2_C1_GET_ENC_C,
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@ -97,7 +98,7 @@ typedef enum {
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// calc STK
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SM_STATE_PH2_CALC_STK,
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SM_STATE_PH2_W4_STK,
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SM_STATE_PH2_SEND_STK,
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SM_STATE_PH2_ENCRYPT_WITH_STK,
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SM_STATE_PH2_W4_LTK_REQUEST,
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SM_STATE_PH2_W4_CONNECTION_ENCRYPTED,
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@ -124,7 +125,7 @@ typedef enum {
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SM_STATE_PH4_SEND_LTK,
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// MASTR ROLE
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// INITITIATOR ROLE
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SM_STATE_INITIATOR_CONNECTED,
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// PH1
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@ -133,7 +134,9 @@ typedef enum {
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// PH2
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SM_STATE_INITIATOR_PH2_W4_PAIRING_CONFIRM,
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SM_STATE_INITIATOR_PH2_W4_PAIRING_RANDOM,
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SM_STATE_INITIATOR_XXX,
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} security_manager_state_t;
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typedef enum {
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@ -1005,13 +1008,21 @@ static void sm_run(void){
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break;
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}
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case SM_STATE_SEND_PAIRING_RANDOM: {
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case SM_STATE_PH2_SEND_PAIRING_RANDOM: {
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uint8_t buffer[17];
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buffer[0] = SM_CODE_PAIRING_RANDOM;
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swap128(setup->sm_s_random, &buffer[1]);
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if (connection->sm_role){
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swap128(setup->sm_s_random, &buffer[1]);
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} else {
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swap128(setup->sm_m_random, &buffer[1]);
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}
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l2cap_send_connectionless(connection->sm_handle, L2CAP_CID_SECURITY_MANAGER_PROTOCOL, (uint8_t*) buffer, sizeof(buffer));
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sm_2timeout_reset();
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connection->sm_state_responding = SM_STATE_PH2_W4_LTK_REQUEST;
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if (connection->sm_role){
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connection->sm_state_responding = SM_STATE_PH2_W4_LTK_REQUEST;
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} else {
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connection->sm_state_responding = SM_STATE_INITIATOR_PH2_W4_PAIRING_RANDOM;
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}
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break;
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}
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@ -1044,7 +1055,11 @@ static void sm_run(void){
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// already busy?
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if (sm_aes128_state == SM_AES128_ACTIVE) break;
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// calculate m_confirm using aes128 engine - step 1
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sm_c1_t1(setup->sm_m_random, (uint8_t*) &setup->sm_m_preq, (uint8_t*) &setup->sm_s_pres, setup->sm_m_addr_type, setup->sm_s_addr_type, plaintext);
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if (connection->sm_role){
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sm_c1_t1(setup->sm_m_random, (uint8_t*) &setup->sm_m_preq, (uint8_t*) &setup->sm_s_pres, setup->sm_m_addr_type, setup->sm_s_addr_type, plaintext);
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} else {
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sm_c1_t1(setup->sm_s_random, (uint8_t*) &setup->sm_m_preq, (uint8_t*) &setup->sm_s_pres, setup->sm_m_addr_type, setup->sm_s_addr_type, plaintext);
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}
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sm_aes128_start(setup->sm_tk, plaintext);
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sm_next_responding_state();
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break;
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@ -1094,7 +1109,7 @@ static void sm_run(void){
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}
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return;
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}
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case SM_STATE_PH2_SEND_STK: {
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case SM_STATE_PH2_ENCRYPT_WITH_STK: {
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sm_key_t stk_flipped;
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swap128(setup->sm_s_ltk, stk_flipped);
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hci_send_cmd(&hci_le_long_term_key_request_reply, connection->sm_handle, stk_flipped);
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@ -1272,13 +1287,20 @@ static void sm_handle_encryption_result(uint8_t * data){
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return;
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case SM_STATE_PH2_C1_W4_ENC_D:
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{
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sm_key_t m_confirm_test;
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swap128(data, m_confirm_test);
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print_key("c1!", m_confirm_test);
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if (memcmp(setup->sm_m_confirm, m_confirm_test, 16) == 0){
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// send s_random
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connection->sm_state_responding = SM_STATE_SEND_PAIRING_RANDOM;
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return;
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sm_key_t remote_confirm_test;
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swap128(data, remote_confirm_test);
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print_key("c1!", remote_confirm_test);
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if (connection->sm_role){
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if (memcmp(setup->sm_m_confirm, remote_confirm_test, 16) == 0){
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// send s_random
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connection->sm_state_responding = SM_STATE_PH2_SEND_PAIRING_RANDOM;
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return;
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}
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} else {
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if (memcmp(setup->sm_s_confirm, remote_confirm_test, 16) == 0){
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connection->sm_state_responding = SM_STATE_PH2_CALC_STK;
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return;
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}
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}
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setup->sm_pairing_failed_reason = SM_REASON_CONFIRM_VALUE_FAILED;
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connection->sm_state_responding = SM_STATE_SEND_PAIRING_FAILED;
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@ -1288,7 +1310,7 @@ static void sm_handle_encryption_result(uint8_t * data){
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swap128(data, setup->sm_s_ltk);
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sm_truncate_key(setup->sm_s_ltk, connection->sm_actual_encryption_key_size);
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print_key("stk", setup->sm_s_ltk);
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connection->sm_state_responding = SM_STATE_PH2_SEND_STK;
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connection->sm_state_responding = SM_STATE_PH2_ENCRYPT_WITH_STK;
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return;
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case SM_STATE_PH3_Y_W4_ENC:{
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sm_key_t y128;
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@ -1554,7 +1576,11 @@ static void sm_event_packet_handler (uint8_t packet_type, uint16_t channel, uint
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log_info("Eencryption state change: %u", connection->sm_connection_encrypted);
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if (!connection->sm_connection_encrypted) break;
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if (connection->sm_state_responding == SM_STATE_PH2_W4_CONNECTION_ENCRYPTED) {
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connection->sm_state_responding = SM_STATE_PH3_GET_RANDOM;
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if (connection->sm_role){
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connection->sm_state_responding = SM_STATE_PH3_GET_RANDOM;
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} else {
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connection->sm_state_responding = SM_STATE_INITIATOR_XXX;
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}
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}
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break;
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@ -1680,6 +1706,28 @@ static void sm_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *pac
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connection->sm_state_responding = SM_STATE_PH2_C1_GET_RANDOM_A;
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break;
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case SM_STATE_INITIATOR_PH2_W4_PAIRING_CONFIRM:
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if (packet[0] != SM_CODE_PAIRING_CONFIRM){
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sm_pdu_received_in_wrong_state();
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break;
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}
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// store s_confirm
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memcpy(setup->sm_s_confirm, &packet[1], 16);
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connection->sm_state_responding = SM_STATE_PH2_SEND_PAIRING_RANDOM;
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break;
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case SM_STATE_INITIATOR_PH2_W4_PAIRING_RANDOM:
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if (packet[0] != SM_CODE_PAIRING_RANDOM){
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sm_pdu_received_in_wrong_state();
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break;;
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}
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// received random value
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swap128(&packet[1], setup->sm_s_random);
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connection->sm_state_responding = SM_STATE_PH2_C1_GET_ENC_C;
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break;
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// Responder
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case SM_STATE_IDLE:
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case SM_STATE_W4_PAIRING_REQUEST:
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