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sm: enable support for LE Secure Connection debug keys for testing

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This commit is contained in:
Matthias Ringwald 2023-11-20 14:08:30 +01:00
parent c2cab3fe94
commit db88441f67
3 changed files with 46 additions and 3 deletions
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1
doc/manual/docs-template/how_to.md
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@ -98,6 +98,7 @@ BTstack properties:
| ENABLE_LE_PERIPHERAL | Enable support for LE Peripheral Role in HCI and Security Manager |
| ENABLE_LE_CENTRAL | Enable support for LE Central Role in HCI and Security Manager |
| ENABLE_LE_SECURE_CONNECTIONS | Enable LE Secure Connections |
| ENABLE_LE_SECURE_CONNECTIONS_DEBUG_KEY | Enable support for LE Secure Connection debug keys for testing |
| ENABLE_LE_PROACTIVE_AUTHENTICATION | Enable automatic encryption for bonded devices on re-connect |
| ENABLE_GATT_CLIENT_PAIRING | Enable GATT Client to start pairing and retry operation on security error |
| ENABLE_MICRO_ECC_FOR_LE_SECURE_CONNECTIONS | Use [micro-ecc library](https://github.com/kmackay/micro-ecc) for ECC operations |

41
src/ble/sm.c
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@ -206,6 +206,9 @@ static bool sm_sc_only_mode;
static uint8_t sm_sc_oob_random[16];
static void (*sm_sc_oob_callback)(const uint8_t * confirm_value, const uint8_t * random_value);
static sm_sc_oob_state_t sm_sc_oob_state;
#ifdef ENABLE_LE_SECURE_CONNECTIONS_DEBUG_KEY
static bool sm_sc_debug_keys_enabled;
#endif
#endif
@ -4964,10 +4967,30 @@ static void sm_ec_generated(void * arg){
// trigger pairing if pending for ec key
sm_trigger_run();
}
static void sm_ec_generate_new_key(void){
static void sm_ec_generate_new_key(void) {
log_info("sm: generate new ec key");
ec_key_generation_state = EC_KEY_GENERATION_ACTIVE;
btstack_crypto_ecc_p256_generate_key(&sm_crypto_ecc_p256_request, ec_q, &sm_ec_generated, NULL);
#ifdef ENABLE_LE_SECURE_CONNECTIONS_DEBUG_KEY
// LE Secure Connections Debug Key
const uint8_t debug_key_public[64] = {
0x20, 0xb0, 0x03, 0xd2, 0xf2, 0x97, 0xbe, 0x2c, 0x5e, 0x2c, 0x83, 0xa7, 0xe9, 0xf9, 0xa5, 0xb9,
0xef, 0xf4, 0x91, 0x11, 0xac, 0xf4, 0xfd, 0xdb, 0xcc, 0x03, 0x01, 0x48, 0x0e, 0x35, 0x9d, 0xe6,
0xdc, 0x80, 0x9c, 0x49, 0x65, 0x2a, 0xeb, 0x6d, 0x63, 0x32, 0x9a, 0xbf, 0x5a, 0x52, 0x15, 0x5c,
0x76, 0x63, 0x45, 0xc2, 0x8f, 0xed, 0x30, 0x24, 0x74, 0x1c, 0x8e, 0xd0, 0x15, 0x89, 0xd2, 0x8b
};
const uint8_t debug_key_private[32] = {
0x3f, 0x49, 0xf6, 0xd4, 0xa3, 0xc5, 0x5f, 0x38, 0x74, 0xc9, 0xb3, 0xe3, 0xd2, 0x10, 0x3f, 0x50,
0x4a, 0xff, 0x60, 0x7b, 0xeb, 0x40, 0xb7, 0x99, 0x58, 0x99, 0xb8, 0xa6, 0xcd, 0x3c, 0x1a, 0xbd
};
if (sm_sc_debug_keys_enabled) {
memcpy(ec_q, debug_key_public, 64);
btstack_crypto_ecc_p256_set_key(debug_key_public, debug_key_private);
ec_key_generation_state = EC_KEY_GENERATION_DONE;
} else
#endif
{
ec_key_generation_state = EC_KEY_GENERATION_ACTIVE;
btstack_crypto_ecc_p256_generate_key(&sm_crypto_ecc_p256_request, ec_q, &sm_ec_generated, NULL);
}
}
#endif
@ -5051,6 +5074,9 @@ void sm_init(void){
void sm_deinit(void){
sm_initialized = false;
btstack_run_loop_remove_timer(&sm_run_timer);
#if defined(ENABLE_LE_SECURE_CONNECTIONS) || defined (ENABLE_LE_SECURE_CONNECTION_DEBUG_KEY)
sm_sc_debug_keys_enabled = false;
#endif
}
void sm_use_fixed_passkey_in_display_role(uint32_t passkey){
@ -5474,6 +5500,15 @@ void sm_set_secure_connections_only_mode(bool enable){
#endif
}
#if defined(ENABLE_LE_SECURE_CONNECTIONS) || defined (ENABLE_LE_SECURE_CONNECTION_DEBUG_KEY)
void sm_test_enable_secure_connections_debug_keys(void) {
log_info("Enable LE Secure Connection Debug Keys for testing");
sm_sc_debug_keys_enabled = true;
// set debug key
sm_ec_generate_new_key();
}
#endif
const uint8_t * gap_get_persistent_irk(void){
return sm_persistent_irk;
}

7
src/ble/sm.h
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@ -291,10 +291,17 @@ void sm_register_ltk_callback( bool (*get_ltk_callback)(hci_con_handle_t con_han
*/
void sm_deinit(void);
/**
* @brief Use Debug Keys for LE Secure Connections for testing until restart
* @note Requires ENABLE_LE_SECURE_CONNECTIONS and ENABLE_LE_SECURE_CONNECTIONS_DEBUG_KEY
*/
void sm_test_enable_secure_connections_debug_keys(void);
// PTS testing
void sm_test_set_irk(sm_key_t irk);
void sm_test_use_fixed_local_csrk(void);
#ifdef ENABLE_TESTING_SUPPORT
void sm_test_set_pairing_failure(int reason);
#endif