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validate m_confirm

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This commit is contained in:
matthias.ringwald@gmail.com 2013-11-08 15:18:45 +00:00
parent 3eaa957fae
commit 0e1aa0ece6
1 changed files with 35 additions and 10 deletions
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45
example/libusb/ble_server.c
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@ -85,6 +85,15 @@ typedef enum {
#define SM_KEYDIST_ID_KEY 0x02
#define SM_KEYDIST_SIGN 0x04
// Pairing Failed Reasons
#define SM_REASON_RESERVED 0x00
#define SM_REASON_PASSKEYT_ENTRY_FAILED 0x01
#define SM_REASON_OOB_NOT_AVAILABLE 0x02
#define SM_REASON_AUTHENTHICATION_REQUIREMENTS 0x03
#define SM_REASON_CONFIRM_VALUE_FAILED 0x04
#define SM_REASON_PAIRING_NOT_SUPPORTED 0x05
#define SM_REASON_ENCRYPTION_KEY_SIZE 0x06
typedef uint8_t key_t[16];
typedef enum {
@ -120,6 +129,7 @@ static int sm_send_master_identification = 0;
static int sm_send_identity_information = 0;
static int sm_send_identity_address_information = 0;
static int sm_send_signing_identification = 0;
static int sm_send_pairing_failed = 0;
static int sm_received_encryption_information = 0;
static int sm_received_master_identification = 0;
@ -136,6 +146,8 @@ static uint8_t sm_pres[7];
static key_t sm_s_random;
static key_t sm_s_confirm;
static uint8_t sm_pairing_failed_reason = 0;
// key distribution, slave sends
static key_t sm_s_ltk;
static uint16_t sm_s_ediv;
@ -363,15 +375,16 @@ void sm_test2(){
printf("Confirm value correct :%u\n", memcmp(c1_flipped, c1_true, 16) == 0);
}
static void sm_validate(void){
printf("sm_validate\n");
static int sm_validate_m_confirm(void){
printf("sm_validate_m_confirm\n");
key_t c1;
sm_c1(sm_tk, sm_m_random, sm_preq, sm_pres, sm_m_addr_type, sm_s_addr_type, sm_m_address, sm_s_address, c1);
printf("mc: "); hexdump(sm_m_confirm, 16);
int m_confirm_valid = memcmp(c1, sm_m_confirm, 16) == 0;
printf("m_confirm_valid %u\n", m_confirm_valid);
printf("m_confirm_valid: %u\n", m_confirm_valid);
return m_confirm_valid;
}
static void sm_run(void){
@ -458,6 +471,14 @@ static void sm_run(void){
l2cap_send_connectionless(sm_response_handle, L2CAP_CID_SECURITY_MANAGER_PROTOCOL, (uint8_t*) buffer, sizeof(buffer));
return;
}
if (sm_send_pairing_failed){
sm_send_pairing_failed = 0;
uint8_t buffer[2];
buffer[0] = SM_CODE_PAIRING_FAILED;
buffer[1] = sm_pairing_failed_reason;
l2cap_send_connectionless(sm_response_handle, L2CAP_CID_SECURITY_MANAGER_PROTOCOL, (uint8_t*) buffer, sizeof(buffer));
return;
}
}
static void sm_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){
@ -465,7 +486,7 @@ static void sm_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *pac
if (packet_type != SM_DATA_PACKET) return;
printf("sm_packet_handler, request %0x\n", packet[0]);
switch (packet[0]){
case SM_CODE_PAIRING_REQUEST:
@ -509,14 +530,18 @@ static void sm_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *pac
case SM_CODE_PAIRING_RANDOM:
// received confirm value
memcpy(sm_m_random, &packet[1], 16);
sm_response_size = 17;
// validate
sm_validate();
//
// validate m confirm
if (!sm_validate_m_confirm()){
sm_send_pairing_failed = 1;
sm_pairing_failed_reason = SM_REASON_CONFIRM_VALUE_FAILED;
break;
}
// TODO: send our own random
memcpy(sm_response_buffer, packet, size);
break;
sm_response_size = 17;
break;
case SM_CODE_ENCRYPTION_INFORMATION:
sm_received_encryption_information = 1;