1 /****************************************************************************** 2 * 3 * Copyright (C) 1999-2012 Broadcom Corporation 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at: 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 ******************************************************************************/ 18 19 /****************************************************************************** 20 * 21 * This file contains functions for BLE device control utilities, and LE 22 * security functions. 23 * 24 ******************************************************************************/ 25 26 #include <string.h> 27 28 #include "bt_types.h" 29 #include "hcimsgs.h" 30 #include "btu.h" 31 #include "btm_int.h" 32 #include "btm_ble_api.h" 33 #include "smp_api.h" 34 #include "l2c_int.h" 35 #include "gap_api.h" 36 37 #if SMP_INCLUDED == TRUE 38 extern BOOLEAN AES_CMAC ( BT_OCTET16 key, UINT8 *input, UINT16 length, UINT16 tlen, UINT8 *p_signature); 39 extern void smp_link_encrypted(BD_ADDR bda, UINT8 encr_enable); 40 extern BOOLEAN smp_proc_ltk_request(BD_ADDR bda); 41 #endif 42 extern void gatt_notify_enc_cmpl(BD_ADDR bd_addr); 43 44 /*******************************************************************************/ 45 /* External Function to be called by other modules */ 46 /*******************************************************************************/ 47 /******************************************************** 48 ** 49 ** Function BTM_SecAddBleDevice 50 ** 51 ** Description Add/modify device. This function will be normally called 52 ** during host startup to restore all required information 53 ** for a LE device stored in the NVRAM. 54 ** 55 ** Parameters: bd_addr - BD address of the peer 56 ** bd_name - Name of the peer device. NULL if unknown. 57 ** dev_type - Remote device's device type. 58 ** addr_type - LE device address type. 59 ** 60 ** Returns TRUE if added OK, else FALSE 61 ** 62 *******************************************************************************/ 63 BOOLEAN BTM_SecAddBleDevice (BD_ADDR bd_addr, BD_NAME bd_name, tBT_DEVICE_TYPE dev_type, 64 tBLE_ADDR_TYPE addr_type) 65 { 66 #if BLE_INCLUDED == TRUE 67 tBTM_SEC_DEV_REC *p_dev_rec; 68 UINT8 i = 0; 69 tBTM_INQ_INFO *p_info=NULL; 70 71 BTM_TRACE_DEBUG1 ("BTM_SecAddBleDevice dev_type=0x%x", dev_type); 72 p_dev_rec = btm_find_dev (bd_addr); 73 74 if (!p_dev_rec) 75 { 76 BTM_TRACE_DEBUG0("Add a new device"); 77 78 /* There is no device record, allocate one. 79 * If we can not find an empty spot for this one, let it fail. */ 80 for (i = 0; i < BTM_SEC_MAX_DEVICE_RECORDS; i++) 81 { 82 if (!(btm_cb.sec_dev_rec[i].sec_flags & BTM_SEC_IN_USE)) 83 { 84 BTM_TRACE_DEBUG1 ("allocate a new dev rec idx=0x%x ", i ); 85 p_dev_rec = &btm_cb.sec_dev_rec[i]; 86 87 /* Mark this record as in use and initialize */ 88 memset (p_dev_rec, 0, sizeof (tBTM_SEC_DEV_REC)); 89 p_dev_rec->sec_flags = BTM_SEC_IN_USE; 90 memcpy (p_dev_rec->bd_addr, bd_addr, BD_ADDR_LEN); 91 p_dev_rec->hci_handle = BTM_GetHCIConnHandle (bd_addr); 92 93 /* update conn params, use default value for background connection params */ 94 p_dev_rec->conn_params.min_conn_int = 95 p_dev_rec->conn_params.max_conn_int = 96 p_dev_rec->conn_params.supervision_tout = 97 p_dev_rec->conn_params.slave_latency = BTM_BLE_CONN_PARAM_UNDEF; 98 99 BTM_TRACE_DEBUG1 ("hci_handl=0x%x ", p_dev_rec->hci_handle ); 100 break; 101 } 102 } 103 104 if (!p_dev_rec) 105 return(FALSE); 106 } 107 else 108 { 109 BTM_TRACE_DEBUG0("Device already exist"); 110 } 111 112 memset(p_dev_rec->sec_bd_name, 0, sizeof(tBTM_BD_NAME)); 113 114 if (bd_name && bd_name[0]) 115 { 116 p_dev_rec->sec_flags |= BTM_SEC_NAME_KNOWN; 117 BCM_STRNCPY_S ((char *)p_dev_rec->sec_bd_name, sizeof (p_dev_rec->sec_bd_name), 118 (char *)bd_name, BTM_MAX_REM_BD_NAME_LEN); 119 } 120 p_dev_rec->device_type = dev_type; 121 p_dev_rec->ble.ble_addr_type = addr_type; 122 BTM_TRACE_DEBUG3 ("p_dev_rec->device_type =0x%x addr_type=0x%x sec_flags=0x%x", 123 dev_type, addr_type, p_dev_rec->sec_flags); 124 125 /* sync up with the Inq Data base*/ 126 p_info = BTM_InqDbRead(bd_addr); 127 if (p_info) 128 { 129 p_info->results.ble_addr_type = p_dev_rec->ble.ble_addr_type ; 130 p_info->results.device_type = p_dev_rec->device_type; 131 BTM_TRACE_DEBUG2 ("InqDb device_type =0x%x addr_type=0x%x", 132 p_info->results.device_type, p_info->results.ble_addr_type); 133 } 134 135 #endif 136 return(TRUE); 137 } 138 139 /******************************************************************************* 140 ** 141 ** Function BTM_SecAddBleKey 142 ** 143 ** Description Add/modify LE device information. This function will be 144 ** normally called during host startup to restore all required 145 ** information stored in the NVRAM. 146 ** 147 ** Parameters: bd_addr - BD address of the peer 148 ** p_le_key - LE key values. 149 ** key_type - LE SMP key type. 150 * 151 ** Returns TRUE if added OK, else FALSE 152 ** 153 *******************************************************************************/ 154 BOOLEAN BTM_SecAddBleKey (BD_ADDR bd_addr, tBTM_LE_KEY_VALUE *p_le_key, tBTM_LE_KEY_TYPE key_type) 155 { 156 #if (BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE) 157 tBTM_SEC_DEV_REC *p_dev_rec; 158 BTM_TRACE_DEBUG0 ("BTM_SecAddBleKey"); 159 p_dev_rec = btm_find_dev (bd_addr); 160 if (!p_dev_rec || !p_le_key || 161 (key_type != BTM_LE_KEY_PENC && key_type != BTM_LE_KEY_PID && 162 key_type != BTM_LE_KEY_PCSRK && key_type != BTM_LE_KEY_LENC && 163 key_type != BTM_LE_KEY_LCSRK)) 164 { 165 BTM_TRACE_WARNING3 ("BTM_SecAddBleKey() Wrong Type, or No Device record \ 166 for bdaddr: %08x%04x, Type: %d", 167 (bd_addr[0]<<24)+(bd_addr[1]<<16)+(bd_addr[2]<<8)+bd_addr[3], 168 (bd_addr[4]<<8)+bd_addr[5], key_type); 169 return(FALSE); 170 } 171 172 BTM_TRACE_DEBUG3 ("BTM_SecAddLeKey() BDA: %08x%04x, Type: 0x%02x", 173 (bd_addr[0]<<24)+(bd_addr[1]<<16)+(bd_addr[2]<<8)+bd_addr[3], 174 (bd_addr[4]<<8)+bd_addr[5], key_type); 175 176 if (key_type == BTM_LE_KEY_PENC || key_type == BTM_LE_KEY_PID || 177 key_type == BTM_LE_KEY_PCSRK || key_type == BTM_LE_KEY_LENC || 178 key_type == BTM_LE_KEY_LCSRK) 179 { 180 btm_sec_save_le_key (bd_addr, key_type, p_le_key, FALSE); 181 } 182 183 #endif 184 185 return(TRUE); 186 } 187 188 /******************************************************************************* 189 ** 190 ** Function BTM_BleLoadLocalKeys 191 ** 192 ** Description Local local identity key, encryption root or sign counter. 193 ** 194 ** Parameters: key_type: type of key, can be BTM_BLE_KEY_TYPE_ID, BTM_BLE_KEY_TYPE_ER 195 ** or BTM_BLE_KEY_TYPE_COUNTER. 196 ** p_key: pointer to the key. 197 * 198 ** Returns non2. 199 ** 200 *******************************************************************************/ 201 void BTM_BleLoadLocalKeys(UINT8 key_type, tBTM_BLE_LOCAL_KEYS *p_key) 202 { 203 #if BLE_INCLUDED == TRUE 204 tBTM_DEVCB *p_devcb = &btm_cb.devcb; 205 BTM_TRACE_DEBUG0 ("BTM_BleLoadLocalKeys"); 206 if (p_key != NULL) 207 { 208 switch (key_type) 209 { 210 case BTM_BLE_KEY_TYPE_ID: 211 memcpy(&p_devcb->id_keys, &p_key->id_keys, sizeof(tBTM_BLE_LOCAL_ID_KEYS)); 212 break; 213 214 case BTM_BLE_KEY_TYPE_ER: 215 memcpy(p_devcb->er, p_key->er, sizeof(BT_OCTET16)); 216 break; 217 218 default: 219 BTM_TRACE_ERROR1("unknow local key type: %d", key_type); 220 break; 221 } 222 } 223 #endif 224 } 225 226 /******************************************************************************* 227 ** 228 ** Function BTM_GetDeviceEncRoot 229 ** 230 ** Description This function is called to read the local device encryption 231 ** root. 232 ** 233 ** Returns void 234 ** the local device ER is copied into er 235 ** 236 *******************************************************************************/ 237 void BTM_GetDeviceEncRoot (BT_OCTET16 er) 238 { 239 BTM_TRACE_DEBUG0 ("BTM_GetDeviceEncRoot"); 240 241 #if BLE_INCLUDED == TRUE 242 memcpy (er, btm_cb.devcb.er, BT_OCTET16_LEN); 243 #endif 244 } 245 246 /******************************************************************************* 247 ** 248 ** Function BTM_GetDeviceIDRoot 249 ** 250 ** Description This function is called to read the local device identity 251 ** root. 252 ** 253 ** Returns void 254 ** the local device IR is copied into irk 255 ** 256 *******************************************************************************/ 257 void BTM_GetDeviceIDRoot (BT_OCTET16 irk) 258 { 259 BTM_TRACE_DEBUG0 ("BTM_GetDeviceIDRoot "); 260 261 #if BLE_INCLUDED == TRUE 262 memcpy (irk, btm_cb.devcb.id_keys.irk, BT_OCTET16_LEN); 263 #endif 264 } 265 266 /******************************************************************************* 267 ** 268 ** Function BTM_GetDeviceDHK 269 ** 270 ** Description This function is called to read the local device DHK. 271 ** 272 ** Returns void 273 ** the local device DHK is copied into dhk 274 ** 275 *******************************************************************************/ 276 void BTM_GetDeviceDHK (BT_OCTET16 dhk) 277 { 278 #if BLE_INCLUDED == TRUE 279 BTM_TRACE_DEBUG0 ("BTM_GetDeviceDHK"); 280 memcpy (dhk, btm_cb.devcb.id_keys.dhk, BT_OCTET16_LEN); 281 #endif 282 } 283 284 /******************************************************************************* 285 ** 286 ** Function BTM_ReadConnectionAddr 287 ** 288 ** Description This function is called to get the local device address information 289 ** . 290 ** 291 ** Returns void 292 ** 293 *******************************************************************************/ 294 void BTM_ReadConnectionAddr (BD_ADDR remote_bda, BD_ADDR local_conn_addr, tBLE_ADDR_TYPE *p_addr_type) 295 { 296 #if BLE_INCLUDED == TRUE 297 tACL_CONN *p_acl = btm_bda_to_acl(remote_bda); 298 299 if (p_acl == NULL) 300 { 301 BTM_TRACE_ERROR0("No connection exist!"); 302 return; 303 } 304 memcpy(local_conn_addr, p_acl->conn_addr, BD_ADDR_LEN); 305 * p_addr_type = p_acl->conn_addr_type; 306 307 BTM_TRACE_DEBUG2 ("BTM_ReadConnectionAddr address type: %d addr: 0x%02x", 308 p_acl->conn_addr_type, p_acl->conn_addr[0]); 309 310 #endif 311 } 312 /******************************************************************************* 313 ** 314 ** Function BTM_IsBleConnection 315 ** 316 ** Description This function is called to check if the connection handle 317 ** for an LE link 318 ** 319 ** Returns TRUE if connection is LE link, otherwise FALSE. 320 ** 321 *******************************************************************************/ 322 BOOLEAN BTM_IsBleConnection (UINT16 conn_handle) 323 { 324 #if (BLE_INCLUDED == TRUE) 325 UINT8 xx; 326 tACL_CONN *p; 327 328 BTM_TRACE_API1 ("BTM_IsBleConnection: conn_handle: %d", conn_handle); 329 330 xx = btm_handle_to_acl_index (conn_handle); 331 if (xx >= MAX_L2CAP_LINKS) 332 return FALSE; 333 334 p = &btm_cb.acl_db[xx]; 335 336 return(p->is_le_link); 337 #else 338 return FALSE; 339 #endif 340 } 341 342 /******************************************************************************* 343 ** 344 ** Function BTM_ReadRemoteConnectionAddr 345 ** 346 ** Description This function is read the remote device address currently used 347 ** . 348 ** 349 ** Returns void 350 ** 351 *******************************************************************************/ 352 BOOLEAN BTM_ReadRemoteConnectionAddr(BD_ADDR pseudo_addr, BD_ADDR conn_addr, tBLE_ADDR_TYPE *p_addr_type) 353 { 354 BOOLEAN st = TRUE; 355 #if BLE_INCLUDED == TRUE 356 tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev(pseudo_addr); 357 358 memcpy(conn_addr, pseudo_addr, BD_ADDR_LEN); 359 if (p_dev_rec != NULL) 360 { 361 *p_addr_type = p_dev_rec->ble.ble_addr_type; 362 } 363 #endif 364 return st; 365 } 366 /******************************************************************************* 367 ** 368 ** Function BTM_SecurityGrant 369 ** 370 ** Description This function is called to grant security process. 371 ** 372 ** Parameters bd_addr - peer device bd address. 373 ** res - result of the operation BTM_SUCCESS if success. 374 ** Otherwise, BTM_REPEATED_ATTEMPTS is too many attempts. 375 ** 376 ** Returns None 377 ** 378 *******************************************************************************/ 379 void BTM_SecurityGrant(BD_ADDR bd_addr, UINT8 res) 380 { 381 #if (BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE) 382 tSMP_STATUS res_smp = (res == BTM_SUCCESS) ? SMP_SUCCESS : SMP_REPEATED_ATTEMPTS; 383 BTM_TRACE_DEBUG0 ("BTM_SecurityGrant"); 384 SMP_SecurityGrant(bd_addr, res_smp); 385 #endif 386 } 387 388 /******************************************************************************* 389 ** 390 ** Function BTM_BlePasskeyReply 391 ** 392 ** Description This function is called after Security Manager submitted 393 ** passkey request to the application. 394 ** 395 ** Parameters: bd_addr - Address of the device for which passkey was requested 396 ** res - result of the operation BTM_SUCCESS if success 397 ** key_len - length in bytes of the Passkey 398 ** p_passkey - pointer to array with the passkey 399 ** trusted_mask - bitwise OR of trusted services (array of UINT32) 400 ** 401 *******************************************************************************/ 402 void BTM_BlePasskeyReply (BD_ADDR bd_addr, UINT8 res, UINT32 passkey) 403 { 404 #if (BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE) 405 tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (bd_addr); 406 tSMP_STATUS res_smp = (res == BTM_SUCCESS) ? SMP_SUCCESS : SMP_PASSKEY_ENTRY_FAIL; 407 408 if (p_dev_rec == NULL) 409 { 410 BTM_TRACE_ERROR0("Passkey reply to Unknown device"); 411 return; 412 } 413 414 p_dev_rec->sec_flags |= BTM_SEC_LINK_KEY_AUTHED; 415 BTM_TRACE_DEBUG0 ("BTM_BlePasskeyReply"); 416 SMP_PasskeyReply(bd_addr, res_smp, passkey); 417 #endif 418 } 419 420 /******************************************************************************* 421 ** 422 ** Function BTM_BleOobDataReply 423 ** 424 ** Description This function is called to provide the OOB data for 425 ** SMP in response to BTM_LE_OOB_REQ_EVT 426 ** 427 ** Parameters: bd_addr - Address of the peer device 428 ** res - result of the operation SMP_SUCCESS if success 429 ** p_data - simple pairing Randomizer C. 430 ** 431 *******************************************************************************/ 432 void BTM_BleOobDataReply(BD_ADDR bd_addr, UINT8 res, UINT8 len, UINT8 *p_data) 433 { 434 #if (BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE) 435 tSMP_STATUS res_smp = (res == BTM_SUCCESS) ? SMP_SUCCESS : SMP_OOB_FAIL; 436 tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (bd_addr); 437 438 BTM_TRACE_DEBUG0 ("BTM_BleOobDataReply"); 439 440 if (p_dev_rec == NULL) 441 { 442 BTM_TRACE_ERROR0("BTM_BleOobDataReply() to Unknown device"); 443 return; 444 } 445 446 p_dev_rec->sec_flags |= BTM_SEC_LINK_KEY_AUTHED; 447 SMP_OobDataReply(bd_addr, res_smp, len, p_data); 448 #endif 449 } 450 451 /****************************************************************************** 452 ** 453 ** Function BTM_BleSetConnScanParams 454 ** 455 ** Description Set scan parameter used in BLE connection request 456 ** 457 ** Parameters: scan_interval: scan interval 458 ** scan_window: scan window 459 ** 460 ** Returns void 461 ** 462 *******************************************************************************/ 463 void BTM_BleSetConnScanParams (UINT16 scan_interval, UINT16 scan_window) 464 { 465 #if (BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE) 466 tBTM_BLE_CB *p_ble_cb = &btm_cb.ble_ctr_cb; 467 BOOLEAN new_param = FALSE; 468 469 if (BTM_BLE_VALID_PRAM(scan_interval, BTM_BLE_SCAN_INT_MIN, BTM_BLE_SCAN_INT_MAX) && 470 BTM_BLE_VALID_PRAM(scan_window, BTM_BLE_SCAN_WIN_MIN, BTM_BLE_SCAN_WIN_MAX)) 471 { 472 btu_stop_timer(&p_ble_cb->scan_param_idle_timer); 473 474 if (p_ble_cb->scan_int != scan_interval) 475 { 476 p_ble_cb->scan_int = scan_interval; 477 new_param = TRUE; 478 } 479 480 if (p_ble_cb->scan_win != scan_window) 481 { 482 p_ble_cb->scan_win = scan_window; 483 new_param = TRUE; 484 } 485 486 if (new_param && p_ble_cb->conn_state == BLE_BG_CONN) 487 { 488 btm_ble_suspend_bg_conn(); 489 } 490 } 491 else 492 { 493 BTM_TRACE_ERROR0("Illegal Connection Scan Parameters"); 494 } 495 #endif 496 } 497 498 /******************************************************** 499 ** 500 ** Function BTM_BleSetPrefConnParams 501 ** 502 ** Description Set a peripheral's preferred connection parameters 503 ** 504 ** Parameters: bd_addr - BD address of the peripheral 505 ** scan_interval: scan interval 506 ** scan_window: scan window 507 ** min_conn_int - minimum preferred connection interval 508 ** max_conn_int - maximum preferred connection interval 509 ** slave_latency - preferred slave latency 510 ** supervision_tout - preferred supervision timeout 511 ** 512 ** Returns void 513 ** 514 *******************************************************************************/ 515 void BTM_BleSetPrefConnParams (BD_ADDR bd_addr, 516 UINT16 min_conn_int, UINT16 max_conn_int, 517 UINT16 slave_latency, UINT16 supervision_tout) 518 { 519 #if BLE_INCLUDED == TRUE 520 tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (bd_addr); 521 522 BTM_TRACE_API4 ("BTM_BleSetPrefConnParams min: %u max: %u latency: %u \ 523 tout: %u", 524 min_conn_int, max_conn_int, slave_latency, supervision_tout); 525 526 if (BTM_BLE_VALID_PRAM(min_conn_int, BTM_BLE_CONN_INT_MIN, BTM_BLE_CONN_INT_MAX) && 527 BTM_BLE_VALID_PRAM(max_conn_int, BTM_BLE_CONN_INT_MIN, BTM_BLE_CONN_INT_MAX) && 528 BTM_BLE_VALID_PRAM(supervision_tout, BTM_BLE_CONN_SUP_TOUT_MIN, BTM_BLE_CONN_SUP_TOUT_MAX) && 529 (slave_latency <= BTM_BLE_CONN_LATENCY_MAX || slave_latency == BTM_BLE_CONN_PARAM_UNDEF)) 530 { 531 if (p_dev_rec) 532 { 533 /* expect conn int and stout and slave latency to be updated all together */ 534 if (min_conn_int != BTM_BLE_CONN_PARAM_UNDEF || max_conn_int != BTM_BLE_CONN_PARAM_UNDEF) 535 { 536 if (min_conn_int != BTM_BLE_CONN_PARAM_UNDEF) 537 p_dev_rec->conn_params.min_conn_int = min_conn_int; 538 else 539 p_dev_rec->conn_params.min_conn_int = max_conn_int; 540 541 if (max_conn_int != BTM_BLE_CONN_PARAM_UNDEF) 542 p_dev_rec->conn_params.max_conn_int = max_conn_int; 543 else 544 p_dev_rec->conn_params.max_conn_int = min_conn_int; 545 546 if (slave_latency != BTM_BLE_CONN_PARAM_UNDEF) 547 p_dev_rec->conn_params.slave_latency = slave_latency; 548 else 549 p_dev_rec->conn_params.slave_latency = BTM_BLE_CONN_SLAVE_LATENCY_DEF; 550 551 if (supervision_tout != BTM_BLE_CONN_PARAM_UNDEF) 552 p_dev_rec->conn_params.supervision_tout = supervision_tout; 553 else 554 p_dev_rec->conn_params.slave_latency = BTM_BLE_CONN_TIMEOUT_DEF; 555 556 } 557 558 } 559 else 560 { 561 BTM_TRACE_ERROR0("Unknown Device, setting rejected"); 562 } 563 } 564 else 565 { 566 BTM_TRACE_ERROR0("Illegal Connection Parameters"); 567 } 568 #endif /* BLE_INCLUDED */ 569 } 570 571 /******************************************************************************* 572 ** 573 ** Function BTM_ReadDevInfo 574 ** 575 ** Description This function is called to read the device/address type 576 ** of BD address. 577 ** 578 ** Parameter remote_bda: remote device address 579 ** p_dev_type: output parameter to read the device type. 580 ** p_addr_type: output parameter to read the address type. 581 ** 582 *******************************************************************************/ 583 void BTM_ReadDevInfo (BD_ADDR remote_bda, tBT_DEVICE_TYPE *p_dev_type, tBLE_ADDR_TYPE *p_addr_type) 584 { 585 #if BLE_INCLUDED == TRUE 586 tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (remote_bda); 587 tBTM_INQ_INFO *p_inq_info = BTM_InqDbRead(remote_bda); 588 589 *p_dev_type = BT_DEVICE_TYPE_BREDR; 590 *p_addr_type = BLE_ADDR_PUBLIC; 591 592 if (!p_dev_rec) 593 { 594 /* Check with the BT manager if details about remote device are known */ 595 if (p_inq_info != NULL) 596 { 597 *p_dev_type = p_inq_info->results.device_type ; 598 *p_addr_type = p_inq_info->results.ble_addr_type; 599 } 600 /* unknown device, assume BR/EDR */ 601 } 602 else /* there is a security device record exisitng */ 603 { 604 /* new inquiry result, overwrite device type in security device record */ 605 if (p_inq_info) 606 { 607 p_dev_rec->device_type = p_inq_info->results.device_type; 608 p_dev_rec->ble.ble_addr_type = p_inq_info->results.ble_addr_type; 609 } 610 *p_dev_type = p_dev_rec->device_type; 611 *p_addr_type = p_dev_rec->ble.ble_addr_type; 612 613 } 614 615 BTM_TRACE_DEBUG2 ("btm_find_dev_type - device_type = %d addr_type = %d", *p_dev_type , *p_addr_type); 616 #endif 617 618 return; 619 } 620 621 #if BLE_INCLUDED == TRUE 622 623 /******************************************************************************* 624 ** 625 ** Function BTM_BleReceiverTest 626 ** 627 ** Description This function is called to start the LE Receiver test 628 ** 629 ** Parameter rx_freq - Frequency Range 630 ** p_cmd_cmpl_cback - Command Complete callback 631 ** 632 *******************************************************************************/ 633 void BTM_BleReceiverTest(UINT8 rx_freq, tBTM_CMPL_CB *p_cmd_cmpl_cback) 634 { 635 btm_cb.devcb.p_le_test_cmd_cmpl_cb = p_cmd_cmpl_cback; 636 637 if (btsnd_hcic_ble_receiver_test(rx_freq) == FALSE) 638 { 639 BTM_TRACE_ERROR1("%s: Unable to Trigger LE receiver test", __FUNCTION__); 640 } 641 } 642 643 /******************************************************************************* 644 ** 645 ** Function BTM_BleTransmitterTest 646 ** 647 ** Description This function is called to start the LE Transmitter test 648 ** 649 ** Parameter tx_freq - Frequency Range 650 ** test_data_len - Length in bytes of payload data in each packet 651 ** packet_payload - Pattern to use in the payload 652 ** p_cmd_cmpl_cback - Command Complete callback 653 ** 654 *******************************************************************************/ 655 void BTM_BleTransmitterTest(UINT8 tx_freq, UINT8 test_data_len, 656 UINT8 packet_payload, tBTM_CMPL_CB *p_cmd_cmpl_cback) 657 { 658 btm_cb.devcb.p_le_test_cmd_cmpl_cb = p_cmd_cmpl_cback; 659 if (btsnd_hcic_ble_transmitter_test(tx_freq, test_data_len, packet_payload) == FALSE) 660 { 661 BTM_TRACE_ERROR1("%s: Unable to Trigger LE transmitter test", __FUNCTION__); 662 } 663 } 664 665 /******************************************************************************* 666 ** 667 ** Function BTM_BleTestEnd 668 ** 669 ** Description This function is called to stop the in-progress TX or RX test 670 ** 671 ** Parameter p_cmd_cmpl_cback - Command complete callback 672 ** 673 *******************************************************************************/ 674 void BTM_BleTestEnd(tBTM_CMPL_CB *p_cmd_cmpl_cback) 675 { 676 btm_cb.devcb.p_le_test_cmd_cmpl_cb = p_cmd_cmpl_cback; 677 678 if (btsnd_hcic_ble_test_end() == FALSE) 679 { 680 BTM_TRACE_ERROR1("%s: Unable to End the LE TX/RX test", __FUNCTION__); 681 } 682 } 683 684 #endif 685 686 /******************************************************************************* 687 ** Internal Functions 688 *******************************************************************************/ 689 #if BLE_INCLUDED == TRUE 690 691 void btm_ble_test_command_complete(UINT8 *p) 692 { 693 tBTM_CMPL_CB *p_cb = btm_cb.devcb.p_le_test_cmd_cmpl_cb; 694 UINT8 status; 695 696 btm_cb.devcb.p_le_test_cmd_cmpl_cb = NULL; 697 698 if (p_cb) 699 { 700 (*p_cb)(p); 701 } 702 } 703 704 /******************************************************************************* 705 ** 706 ** Function BTM_IsBleLink 707 ** 708 ** Description This function is to check the link type is BLE or BR/EDR. 709 ** 710 ** Returns TRUE if BLE link; FALSE if BR/EDR. 711 ** 712 *******************************************************************************/ 713 BOOLEAN BTM_IsBleLink (BD_ADDR bd_addr) 714 { 715 #if (BLE_INCLUDED == TRUE) 716 tACL_CONN *p; 717 BTM_TRACE_DEBUG0 ("BTM_IsBleLink"); 718 if ((p = btm_bda_to_acl(bd_addr)) != NULL) 719 return p->is_le_link; 720 else 721 #endif 722 return FALSE; 723 } 724 /******************************************************************************* 725 ** 726 ** Function BTM_UseLeLink 727 ** 728 ** Description This function is to select the underneath physical link to use. 729 ** 730 ** Returns TRUE to use LE, FALSE use BR/EDR. 731 ** 732 *******************************************************************************/ 733 BOOLEAN BTM_UseLeLink (BD_ADDR bd_addr) 734 { 735 tACL_CONN *p; 736 tBT_DEVICE_TYPE dev_type; 737 tBLE_ADDR_TYPE addr_type; 738 BOOLEAN use_le = FALSE; 739 740 if ((p = btm_bda_to_acl(bd_addr)) != NULL) 741 { 742 #if (BLE_INCLUDED == TRUE) 743 use_le = (p->is_le_link); 744 #endif 745 } 746 else 747 { 748 BTM_ReadDevInfo(bd_addr, &dev_type, &addr_type); 749 use_le = (dev_type == BT_DEVICE_TYPE_BLE); 750 } 751 return use_le; 752 } 753 /******************************************************************************* 754 ** 755 ** Function btm_ble_rand_enc_complete 756 ** 757 ** Description This function is the callback functions for HCI_Rand command 758 ** and HCI_Encrypt command is completed. 759 ** This message is received from the HCI. 760 ** 761 ** Returns void 762 ** 763 *******************************************************************************/ 764 void btm_ble_rand_enc_complete (UINT8 *p, UINT16 op_code, tBTM_RAND_ENC_CB *p_enc_cplt_cback) 765 { 766 tBTM_RAND_ENC params; 767 UINT8 *p_dest = params.param_buf; 768 769 BTM_TRACE_DEBUG0 ("btm_ble_rand_enc_complete"); 770 771 memset(¶ms, 0, sizeof(tBTM_RAND_ENC)); 772 773 /* If there was a callback address for vcs complete, call it */ 774 if (p_enc_cplt_cback && p) 775 { 776 /* Pass paramters to the callback function */ 777 STREAM_TO_UINT8(params.status, p); /* command status */ 778 779 if (params.status == HCI_SUCCESS) 780 { 781 params.opcode = op_code; 782 783 if (op_code == HCI_BLE_RAND) 784 params.param_len = BT_OCTET8_LEN; 785 else 786 params.param_len = BT_OCTET16_LEN; 787 788 memcpy(p_dest, p, params.param_len); /* Fetch return info from HCI event message */ 789 } 790 if (p_enc_cplt_cback) 791 (*p_enc_cplt_cback)(¶ms); /* Call the Encryption complete callback function */ 792 } 793 } 794 795 796 #if (SMP_INCLUDED == TRUE) 797 798 /******************************************************************************* 799 ** 800 ** Function btm_ble_get_enc_key_type 801 ** 802 ** Description This function is to increment local sign counter 803 ** Returns None 804 ** 805 *******************************************************************************/ 806 void btm_ble_increment_sign_ctr(BD_ADDR bd_addr, BOOLEAN is_local ) 807 { 808 tBTM_SEC_DEV_REC *p_dev_rec; 809 810 BTM_TRACE_DEBUG1 ("btm_ble_increment_sign_ctr is_local=%d", is_local); 811 812 if ((p_dev_rec = btm_find_dev (bd_addr)) != NULL) 813 { 814 if (is_local) 815 p_dev_rec->ble.keys.local_counter++; 816 else 817 p_dev_rec->ble.keys.counter++; 818 BTM_TRACE_DEBUG3 ("is_local=%d local sign counter=%d peer sign counter=%d", 819 is_local, 820 p_dev_rec->ble.keys.local_counter, 821 p_dev_rec->ble.keys.counter); 822 } 823 } 824 825 /******************************************************************************* 826 ** 827 ** Function btm_ble_get_enc_key_type 828 ** 829 ** Description This function is to get the BLE key type that has been exchanged 830 ** in betweem local device and peer device. 831 ** 832 ** Returns p_key_type: output parameter to carry the key type value. 833 ** 834 *******************************************************************************/ 835 BOOLEAN btm_ble_get_enc_key_type(BD_ADDR bd_addr, UINT8 *p_key_types) 836 { 837 tBTM_SEC_DEV_REC *p_dev_rec; 838 839 BTM_TRACE_DEBUG0 ("btm_ble_get_enc_key_type"); 840 841 if ((p_dev_rec = btm_find_dev (bd_addr)) != NULL) 842 { 843 *p_key_types = p_dev_rec->ble.key_type; 844 return TRUE; 845 } 846 return FALSE; 847 } 848 849 /******************************************************************************* 850 ** 851 ** Function btm_get_local_div 852 ** 853 ** Description This function is called to read the local DIV 854 ** 855 ** Returns TURE - if a valid DIV is availavle 856 *******************************************************************************/ 857 BOOLEAN btm_get_local_div (BD_ADDR bd_addr, UINT16 *p_div) 858 { 859 tBTM_SEC_DEV_REC *p_dev_rec; 860 BOOLEAN status = FALSE; 861 BTM_TRACE_DEBUG0 ("btm_get_local_div"); 862 863 BTM_TRACE_DEBUG6("bd_addr:%02x-%02x-%02x-%02x-%02x-%02x", 864 bd_addr[0],bd_addr[1], 865 bd_addr[2],bd_addr[3], 866 bd_addr[4],bd_addr[5]); 867 868 p_dev_rec = btm_find_dev (bd_addr); 869 870 if (p_dev_rec && p_dev_rec->ble.keys.div) 871 { 872 status = TRUE; 873 *p_div = p_dev_rec->ble.keys.div; 874 } 875 BTM_TRACE_DEBUG2 ("btm_get_local_div status=%d (1-OK) DIV=0x%x", status, *p_div); 876 return status; 877 } 878 879 /******************************************************************************* 880 ** 881 ** Function btm_sec_save_le_key 882 ** 883 ** Description This function is called by the SMP to update 884 ** an BLE key. SMP is internal, whereas all the keys shall 885 ** be sent to the application. The function is also called 886 ** when application passes ble key stored in NVRAM to the btm_sec. 887 ** pass_to_application parameter is false in this case. 888 ** 889 ** Returns void 890 ** 891 *******************************************************************************/ 892 void btm_sec_save_le_key(BD_ADDR bd_addr, tBTM_LE_KEY_TYPE key_type, tBTM_LE_KEY_VALUE *p_keys, 893 BOOLEAN pass_to_application) 894 { 895 tBTM_SEC_DEV_REC *p_rec; 896 tBTM_LE_EVT_DATA cb_data; 897 UINT8 i; 898 899 BTM_TRACE_DEBUG2 ("btm_sec_save_le_key key_type=0x%x pass_to_application=%d",key_type, pass_to_application); 900 /* Store the updated key in the device database */ 901 902 BTM_TRACE_DEBUG6("bd_addr:%02x-%02x-%02x-%02x-%02x-%02x", 903 bd_addr[0],bd_addr[1], 904 bd_addr[2],bd_addr[3], 905 bd_addr[4],bd_addr[5]); 906 907 if ((p_rec = btm_find_dev (bd_addr)) != NULL && p_keys) 908 { 909 switch (key_type) 910 { 911 case BTM_LE_KEY_PENC: 912 memcpy(p_rec->ble.keys.ltk, p_keys->penc_key.ltk, BT_OCTET16_LEN); 913 memcpy(p_rec->ble.keys.rand, p_keys->penc_key.rand, BT_OCTET8_LEN); 914 p_rec->ble.keys.sec_level = p_keys->penc_key.sec_level; 915 p_rec->ble.keys.ediv = p_keys->penc_key.ediv; 916 p_rec->ble.keys.key_size = p_keys->penc_key.key_size; 917 p_rec->ble.key_type |= BTM_LE_KEY_PENC; 918 p_rec->sec_flags |= BTM_SEC_LINK_KEY_KNOWN; 919 if (p_keys->penc_key.sec_level == SMP_SEC_AUTHENTICATED) 920 p_rec->sec_flags |= BTM_SEC_LINK_KEY_AUTHED; 921 else 922 p_rec->sec_flags &= ~BTM_SEC_LINK_KEY_AUTHED; 923 BTM_TRACE_DEBUG3("BTM_LE_KEY_PENC key_type=0x%x sec_flags=0x%x sec_leve=0x%x", 924 p_rec->ble.key_type, 925 p_rec->sec_flags, 926 p_rec->ble.keys.sec_level); 927 break; 928 929 case BTM_LE_KEY_PID: 930 for (i=0; i<BT_OCTET16_LEN; i++) 931 { 932 p_rec->ble.keys.irk[i] = p_keys->pid_key.irk[i]; 933 } 934 935 //memcpy( p_rec->ble.keys.irk, p_keys->pid_key, BT_OCTET16_LEN); todo will crash the system 936 memcpy(p_rec->ble.static_addr, p_keys->pid_key.static_addr, BD_ADDR_LEN); 937 p_rec->ble.static_addr_type = p_keys->pid_key.addr_type; 938 p_rec->ble.key_type |= BTM_LE_KEY_PID; 939 BTM_TRACE_DEBUG1("BTM_LE_KEY_PID key_type=0x%x save peer IRK", p_rec->ble.key_type); 940 break; 941 942 case BTM_LE_KEY_PCSRK: 943 memcpy(p_rec->ble.keys.csrk, p_keys->pcsrk_key.csrk, BT_OCTET16_LEN); 944 p_rec->ble.keys.srk_sec_level = p_keys->pcsrk_key.sec_level; 945 p_rec->ble.keys.counter = p_keys->pcsrk_key.counter; 946 p_rec->ble.key_type |= BTM_LE_KEY_PCSRK; 947 p_rec->sec_flags |= BTM_SEC_LINK_KEY_KNOWN; 948 if ( p_keys->pcsrk_key.sec_level== SMP_SEC_AUTHENTICATED) 949 p_rec->sec_flags |= BTM_SEC_LINK_KEY_AUTHED; 950 else 951 p_rec->sec_flags &= ~BTM_SEC_LINK_KEY_AUTHED; 952 953 BTM_TRACE_DEBUG4("BTM_LE_KEY_PCSRK key_type=0x%x sec_flags=0x%x sec_level=0x%x peer_counter=%d", 954 p_rec->ble.key_type, 955 p_rec->sec_flags, 956 p_rec->ble.keys.srk_sec_level, 957 p_rec->ble.keys.counter ); 958 break; 959 960 case BTM_LE_KEY_LENC: 961 p_rec->ble.keys.div = p_keys->lenc_key.div; /* update DIV */ 962 p_rec->ble.keys.sec_level = p_keys->lenc_key.sec_level; 963 p_rec->ble.keys.key_size = p_keys->lenc_key.key_size; 964 p_rec->ble.key_type |= BTM_LE_KEY_LENC; 965 966 BTM_TRACE_DEBUG4("BTM_LE_KEY_LENC key_type=0x%x DIV=0x%x key_size=0x%x sec_level=0x%x", 967 p_rec->ble.key_type, 968 p_rec->ble.keys.div, 969 p_rec->ble.keys.key_size, 970 p_rec->ble.keys.sec_level ); 971 break; 972 973 case BTM_LE_KEY_LCSRK:/* local CSRK has been delivered */ 974 p_rec->ble.keys.div = p_keys->lcsrk_key.div; /* update DIV */ 975 p_rec->ble.keys.local_csrk_sec_level = p_keys->lcsrk_key.sec_level; 976 p_rec->ble.keys.local_counter = p_keys->lcsrk_key.counter; 977 p_rec->ble.key_type |= BTM_LE_KEY_LCSRK; 978 BTM_TRACE_DEBUG4("BTM_LE_KEY_LCSRK key_type=0x%x DIV=0x%x scrk_sec_level=0x%x local_counter=%d", 979 p_rec->ble.key_type, 980 p_rec->ble.keys.div, 981 p_rec->ble.keys.local_csrk_sec_level, 982 p_rec->ble.keys.local_counter ); 983 break; 984 985 default: 986 BTM_TRACE_WARNING1("btm_sec_save_le_key (Bad key_type 0x%02x)", key_type); 987 return; 988 } 989 990 BTM_TRACE_DEBUG3 ("BLE key type 0x%02x updated for BDA: %08x%04x (btm_sec_save_le_key)", key_type, 991 (bd_addr[0]<<24)+(bd_addr[1]<<16)+(bd_addr[2]<<8)+bd_addr[3], 992 (bd_addr[4]<<8)+bd_addr[5]); 993 994 /* Notify the application that one of the BLE keys has been updated 995 If link key is in progress, it will get sent later.*/ 996 if (pass_to_application && btm_cb.api.p_le_callback) 997 { 998 cb_data.key.p_key_value = p_keys; 999 cb_data.key.key_type = key_type; 1000 (*btm_cb.api.p_le_callback) (BTM_LE_KEY_EVT, bd_addr, &cb_data); 1001 } 1002 return; 1003 } 1004 1005 BTM_TRACE_WARNING3 ("BLE key type 0x%02x called for Unknown BDA or type: %08x%04x !! (btm_sec_save_le_key)", key_type, 1006 (bd_addr[0]<<24)+(bd_addr[1]<<16)+(bd_addr[2]<<8)+bd_addr[3], 1007 (bd_addr[4]<<8)+bd_addr[5]); 1008 1009 if (p_rec) 1010 { 1011 BTM_TRACE_DEBUG1 ("sec_flags=0x%x", p_rec->sec_flags); 1012 } 1013 } 1014 1015 /******************************************************************************* 1016 ** 1017 ** Function btm_ble_update_sec_key_size 1018 ** 1019 ** Description update the current lin kencryption key size 1020 ** 1021 ** Returns void 1022 ** 1023 *******************************************************************************/ 1024 void btm_ble_update_sec_key_size(BD_ADDR bd_addr, UINT8 enc_key_size) 1025 { 1026 tBTM_SEC_DEV_REC *p_rec; 1027 1028 BTM_TRACE_DEBUG1("btm_ble_update_sec_key_size enc_key_size = %d", enc_key_size); 1029 1030 if ((p_rec = btm_find_dev (bd_addr)) != NULL ) 1031 { 1032 p_rec->enc_key_size = enc_key_size; 1033 } 1034 } 1035 1036 /******************************************************************************* 1037 ** 1038 ** Function btm_ble_read_sec_key_size 1039 ** 1040 ** Description update the current lin kencryption key size 1041 ** 1042 ** Returns void 1043 ** 1044 *******************************************************************************/ 1045 UINT8 btm_ble_read_sec_key_size(BD_ADDR bd_addr) 1046 { 1047 tBTM_SEC_DEV_REC *p_rec; 1048 1049 if ((p_rec = btm_find_dev (bd_addr)) != NULL ) 1050 { 1051 return p_rec->enc_key_size; 1052 } 1053 else 1054 return 0; 1055 } 1056 1057 /******************************************************************************* 1058 ** 1059 ** Function btm_ble_link_sec_check 1060 ** 1061 ** Description Check BLE link security level match. 1062 ** 1063 ** Returns TRUE: check is OK and the *p_sec_req_act contain the action 1064 ** 1065 *******************************************************************************/ 1066 void btm_ble_link_sec_check(BD_ADDR bd_addr, tBTM_LE_AUTH_REQ auth_req, tBTM_BLE_SEC_REQ_ACT *p_sec_req_act) 1067 { 1068 tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (bd_addr); 1069 UINT8 req_sec_level = BTM_LE_SEC_NONE, cur_sec_level = BTM_LE_SEC_NONE; 1070 1071 BTM_TRACE_DEBUG1 ("btm_ble_link_sec_check auth_req =0x%x", auth_req); 1072 1073 if (p_dev_rec == NULL) 1074 { 1075 BTM_TRACE_ERROR0 ("btm_ble_link_sec_check received for unknown device"); 1076 return; 1077 } 1078 1079 if (p_dev_rec->sec_state == BTM_SEC_STATE_ENCRYPTING || 1080 p_dev_rec->sec_state == BTM_SEC_STATE_AUTHENTICATING) 1081 { 1082 /* race condition: discard the security request while master is encrypting the link */ 1083 *p_sec_req_act = BTM_BLE_SEC_REQ_ACT_DISCARD; 1084 } 1085 else 1086 { 1087 req_sec_level = BTM_LE_SEC_UNAUTHENTICATE; 1088 if ((auth_req == (BTM_LE_AUTH_REQ_BOND|BTM_LE_AUTH_REQ_MITM)) || 1089 (auth_req == (BTM_LE_AUTH_REQ_MITM)) ) 1090 { 1091 req_sec_level = BTM_LE_SEC_AUTHENTICATED; 1092 } 1093 1094 BTM_TRACE_DEBUG1 ("dev_rec sec_flags=0x%x", p_dev_rec->sec_flags); 1095 1096 /* currently encrpted */ 1097 if (p_dev_rec->sec_flags & BTM_SEC_ENCRYPTED) 1098 { 1099 if (p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_AUTHED) 1100 cur_sec_level = BTM_LE_SEC_AUTHENTICATED; 1101 else 1102 cur_sec_level = BTM_LE_SEC_UNAUTHENTICATE; 1103 } 1104 else /* unencrypted link */ 1105 { 1106 /* if bonded, get the key security level */ 1107 if (p_dev_rec->ble.key_type & BTM_LE_KEY_PENC) 1108 cur_sec_level = p_dev_rec->ble.keys.sec_level; 1109 else 1110 cur_sec_level = BTM_LE_SEC_NONE; 1111 } 1112 1113 if (cur_sec_level >= req_sec_level) 1114 { 1115 if (cur_sec_level == BTM_LE_SEC_NONE) 1116 { 1117 *p_sec_req_act = BTM_BLE_SEC_REQ_ACT_NONE; 1118 } 1119 else 1120 { 1121 /* To avoid re-encryption on an encrypted link for an equal condition encryption */ 1122 /* if link has been encrypted, do nothing, go straight to furhter action 1123 if (p_dev_rec->sec_flags & BTM_SEC_ENCRYPTED) 1124 *p_sec_req_act = BTM_BLE_SEC_REQ_ACT_DISCARD; 1125 else 1126 */ 1127 *p_sec_req_act = BTM_BLE_SEC_REQ_ACT_ENCRYPT; 1128 } 1129 } 1130 else 1131 { 1132 *p_sec_req_act = BTM_BLE_SEC_REQ_ACT_PAIR; /* start the pariring process to upgrade the keys*/ 1133 } 1134 } 1135 1136 BTM_TRACE_DEBUG3("cur_sec_level=%d req_sec_level=%d sec_req_act=%d", 1137 cur_sec_level, 1138 req_sec_level, 1139 *p_sec_req_act); 1140 1141 } 1142 1143 /******************************************************************************* 1144 ** 1145 ** Function btm_ble_set_encryption 1146 ** 1147 ** Description This function is called to ensure that LE connection is 1148 ** encrypted. Should be called only on an open connection. 1149 ** Typically only needed for connections that first want to 1150 ** bring up unencrypted links, then later encrypt them. 1151 ** 1152 ** Returns void 1153 ** the local device ER is copied into er 1154 ** 1155 *******************************************************************************/ 1156 tBTM_STATUS btm_ble_set_encryption (BD_ADDR bd_addr, void *p_ref_data, UINT8 link_role) 1157 { 1158 tBTM_STATUS cmd = BTM_NO_RESOURCES; 1159 tBTM_BLE_SEC_ACT sec_act = *(tBTM_BLE_SEC_ACT *)p_ref_data ; 1160 tBTM_SEC_DEV_REC *p_rec = btm_find_dev (bd_addr); 1161 1162 if (p_rec == NULL) 1163 { 1164 BTM_TRACE_WARNING1 ("btm_ble_set_encryption (NULL device record!! sec_act=0x%x", sec_act); 1165 return(BTM_WRONG_MODE); 1166 } 1167 1168 BTM_TRACE_DEBUG2 ("btm_ble_set_encryption sec_act=0x%x role_master=%d", sec_act, p_rec->role_master); 1169 1170 if (sec_act == BTM_BLE_SEC_ENCRYPT_MITM) 1171 { 1172 p_rec->security_required |= BTM_SEC_IN_MITM; 1173 } 1174 1175 switch (sec_act) 1176 { 1177 case BTM_BLE_SEC_ENCRYPT: 1178 if (link_role == BTM_ROLE_MASTER) 1179 { 1180 /* start link layer encryption using the security info stored */ 1181 if (btm_ble_start_encrypt(bd_addr, FALSE, NULL)) 1182 { 1183 p_rec->sec_state = BTM_SEC_STATE_ENCRYPTING; 1184 cmd = BTM_CMD_STARTED; 1185 } 1186 break; 1187 } 1188 /* if salve role then fall through to call SMP_Pair below which will send a 1189 sec_request to request the master to encrypt the link */ 1190 case BTM_BLE_SEC_ENCRYPT_NO_MITM: 1191 case BTM_BLE_SEC_ENCRYPT_MITM: 1192 1193 if (SMP_Pair(bd_addr) == SMP_STARTED) 1194 { 1195 cmd = BTM_CMD_STARTED; 1196 p_rec->sec_state = BTM_SEC_STATE_AUTHENTICATING; 1197 } 1198 break; 1199 1200 default: 1201 cmd = BTM_SUCCESS; 1202 break; 1203 } 1204 return cmd; 1205 } 1206 1207 /******************************************************************************* 1208 ** 1209 ** Function btm_ble_ltk_request 1210 ** 1211 ** Description This function is called when encryption request is received 1212 ** on a slave device. 1213 ** 1214 ** 1215 ** Returns void 1216 ** 1217 *******************************************************************************/ 1218 void btm_ble_ltk_request(UINT16 handle, UINT8 rand[8], UINT16 ediv) 1219 { 1220 tBTM_CB *p_cb = &btm_cb; 1221 tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev_by_handle (handle); 1222 BT_OCTET8 dummy_stk = {0}; 1223 1224 BTM_TRACE_DEBUG0 ("btm_ble_ltk_request"); 1225 1226 p_cb->ediv = ediv; 1227 1228 memcpy(p_cb->enc_rand, rand, BT_OCTET8_LEN); 1229 1230 if (p_dev_rec != NULL) 1231 { 1232 if (!smp_proc_ltk_request(p_dev_rec->bd_addr)) 1233 btm_ble_ltk_request_reply(p_dev_rec->bd_addr, FALSE, dummy_stk); 1234 } 1235 1236 } 1237 1238 /******************************************************************************* 1239 ** 1240 ** Function btm_ble_start_encrypt 1241 ** 1242 ** Description This function is called to start LE encryption. 1243 ** 1244 ** 1245 ** Returns void 1246 ** 1247 *******************************************************************************/ 1248 BOOLEAN btm_ble_start_encrypt(BD_ADDR bda, BOOLEAN use_stk, BT_OCTET16 stk) 1249 { 1250 tBTM_CB *p_cb = &btm_cb; 1251 tBTM_SEC_DEV_REC *p_rec = btm_find_dev (bda); 1252 BT_OCTET8 dummy_rand = {0}; 1253 BOOLEAN rt = FALSE; 1254 1255 BTM_TRACE_DEBUG0 ("btm_ble_start_encrypt"); 1256 1257 if (!p_rec || 1258 (p_rec && p_rec->sec_state == BTM_SEC_STATE_ENCRYPTING)) 1259 return FALSE; 1260 1261 p_cb->enc_handle = p_rec->hci_handle; 1262 1263 if (use_stk) 1264 { 1265 if (btsnd_hcic_ble_start_enc(p_rec->hci_handle, dummy_rand, 0, stk)) 1266 rt = TRUE; 1267 } 1268 else if (p_rec->ble.key_type & BTM_LE_KEY_PENC) 1269 { 1270 if (btsnd_hcic_ble_start_enc(p_rec->hci_handle, p_rec->ble.keys.rand, 1271 p_rec->ble.keys.ediv, p_rec->ble.keys.ltk)) 1272 rt = TRUE; 1273 } 1274 else 1275 { 1276 BTM_TRACE_ERROR0("No key available to encrypt the link"); 1277 } 1278 if (rt) 1279 { 1280 if (p_rec->sec_state == BTM_SEC_STATE_IDLE) 1281 p_rec->sec_state = BTM_SEC_STATE_ENCRYPTING; 1282 } 1283 1284 return rt; 1285 } 1286 1287 /******************************************************************************* 1288 ** 1289 ** Function btm_ble_link_encrypted 1290 ** 1291 ** Description This function is called when LE link encrption status is changed. 1292 ** 1293 ** Returns void 1294 ** 1295 *******************************************************************************/ 1296 void btm_ble_link_encrypted(BD_ADDR bd_addr, UINT8 encr_enable) 1297 { 1298 tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (bd_addr); 1299 BOOLEAN enc_cback; 1300 1301 if (!p_dev_rec) 1302 { 1303 BTM_TRACE_WARNING1 ("btm_ble_link_encrypted (No Device Found!) encr_enable=%d", encr_enable); 1304 return; 1305 } 1306 1307 BTM_TRACE_DEBUG1 ("btm_ble_link_encrypted encr_enable=%d", encr_enable); 1308 1309 enc_cback = (p_dev_rec->sec_state == BTM_SEC_STATE_ENCRYPTING); 1310 1311 smp_link_encrypted(bd_addr, encr_enable); 1312 1313 BTM_TRACE_DEBUG1(" p_dev_rec->sec_flags=0x%x", p_dev_rec->sec_flags); 1314 1315 if (encr_enable && p_dev_rec->enc_key_size == 0) 1316 p_dev_rec->enc_key_size = p_dev_rec->ble.keys.key_size; 1317 1318 p_dev_rec->sec_state = BTM_SEC_STATE_IDLE; 1319 if (p_dev_rec->p_callback && enc_cback) 1320 { 1321 if (encr_enable) 1322 btm_sec_dev_rec_cback_event(p_dev_rec, BTM_SUCCESS); 1323 else if (p_dev_rec->role_master) 1324 btm_sec_dev_rec_cback_event(p_dev_rec, BTM_ERR_PROCESSING); 1325 1326 } 1327 /* to notify GATT to send data if any request is pending */ 1328 gatt_notify_enc_cmpl(p_dev_rec->bd_addr); 1329 } 1330 1331 /******************************************************************************* 1332 ** Function btm_enc_proc_ltk 1333 ** Description send LTK reply when it's ready. 1334 *******************************************************************************/ 1335 static void btm_enc_proc_ltk(tSMP_ENC *p) 1336 { 1337 UINT8 i; 1338 BTM_TRACE_DEBUG0 ("btm_enc_proc_ltk"); 1339 if (p && p->param_len == BT_OCTET16_LEN) 1340 { 1341 for (i = 0; i < (BT_OCTET16_LEN - btm_cb.key_size); i ++) 1342 p->param_buf[BT_OCTET16_LEN - i - 1] = 0; 1343 btsnd_hcic_ble_ltk_req_reply(btm_cb.enc_handle, p->param_buf); 1344 } 1345 } 1346 1347 /******************************************************************************* 1348 ** Function btm_enc_proc_slave_y 1349 ** Description calculate LTK when Y is ready 1350 *******************************************************************************/ 1351 static void btm_enc_proc_slave_y(tSMP_ENC *p) 1352 { 1353 UINT16 div, y; 1354 UINT8 *pp = p->param_buf; 1355 tBTM_CB *p_cb = &btm_cb; 1356 tSMP_ENC output; 1357 tBTM_SEC_DEV_REC *p_dev_rec; 1358 1359 BTM_TRACE_DEBUG0 ("btm_enc_proc_slave_y"); 1360 if (p != NULL) 1361 { 1362 STREAM_TO_UINT16(y, pp); 1363 1364 div = p_cb->ediv ^ y; 1365 p_dev_rec = btm_find_dev_by_handle (p_cb->enc_handle); 1366 1367 if ( p_dev_rec && 1368 p_dev_rec->ble.keys.div == div ) 1369 { 1370 BTM_TRACE_DEBUG0 ("LTK request OK"); 1371 /* calculating LTK , LTK = E er(div) */ 1372 SMP_Encrypt(p_cb->devcb.er, BT_OCTET16_LEN, (UINT8 *)&div, 2, &output); 1373 btm_enc_proc_ltk(&output); 1374 } 1375 else 1376 { 1377 BTM_TRACE_DEBUG0 ("LTK request failed - send negative reply"); 1378 btsnd_hcic_ble_ltk_req_neg_reply(p_cb->enc_handle); 1379 if (p_dev_rec) 1380 btm_ble_link_encrypted(p_dev_rec->bd_addr, 0); 1381 1382 } 1383 } 1384 } 1385 1386 /******************************************************************************* 1387 ** 1388 ** Function btm_ble_ltk_request_reply 1389 ** 1390 ** Description This function is called to send a LTK request reply on a slave 1391 ** device. 1392 ** 1393 ** Returns void 1394 ** 1395 *******************************************************************************/ 1396 void btm_ble_ltk_request_reply(BD_ADDR bda, BOOLEAN use_stk, BT_OCTET16 stk) 1397 { 1398 tBTM_SEC_DEV_REC *p_rec = btm_find_dev (bda); 1399 tBTM_CB *p_cb = &btm_cb; 1400 tSMP_ENC output; 1401 1402 if (p_rec == NULL) 1403 { 1404 BTM_TRACE_ERROR0("btm_ble_ltk_request_reply received for unknown device"); 1405 return; 1406 } 1407 1408 BTM_TRACE_DEBUG0 ("btm_ble_ltk_request_reply"); 1409 p_cb->enc_handle = p_rec->hci_handle; 1410 p_cb->key_size = p_rec->ble.keys.key_size; 1411 1412 BTM_TRACE_ERROR1("key size = %d", p_rec->ble.keys.key_size); 1413 if (use_stk) 1414 { 1415 btsnd_hcic_ble_ltk_req_reply(btm_cb.enc_handle, stk); 1416 } 1417 else /* calculate LTK using peer device */ 1418 { 1419 /* generate Y= Encrypt(DHK, Rand) received from encrypt request */ 1420 SMP_Encrypt(p_cb->devcb.id_keys.dhk, BT_OCTET16_LEN, p_cb->enc_rand, 1421 BT_OCTET8_LEN, &output); 1422 btm_enc_proc_slave_y(&output); 1423 } 1424 } 1425 1426 /******************************************************************************* 1427 ** 1428 ** Function btm_ble_io_capabilities_req 1429 ** 1430 ** Description This function is called to handle SMP get IO capability request. 1431 ** 1432 ** Returns void 1433 ** 1434 *******************************************************************************/ 1435 UINT8 btm_ble_io_capabilities_req(tBTM_SEC_DEV_REC *p_dev_rec, tBTM_LE_IO_REQ *p_data) 1436 { 1437 UINT8 callback_rc = BTM_SUCCESS; 1438 BTM_TRACE_DEBUG0 ("btm_ble_io_capabilities_req"); 1439 if (btm_cb.api.p_le_callback) 1440 { 1441 /* the callback function implementation may change the IO capability... */ 1442 callback_rc = (*btm_cb.api.p_le_callback) (BTM_LE_IO_REQ_EVT, p_dev_rec->bd_addr, (tBTM_LE_EVT_DATA *)p_data); 1443 } 1444 #if BTM_OOB_INCLUDED == TRUE 1445 if ((callback_rc == BTM_SUCCESS) || (BTM_OOB_UNKNOWN != p_data->oob_data)) 1446 #else 1447 if (callback_rc == BTM_SUCCESS) 1448 #endif 1449 { 1450 p_data->auth_req &= BTM_LE_AUTH_REQ_MASK; 1451 1452 BTM_TRACE_DEBUG2 ("btm_ble_io_capabilities_req 1: p_dev_rec->security_required = %d auth_req:%d", 1453 p_dev_rec->security_required, p_data->auth_req); 1454 BTM_TRACE_DEBUG2 ("btm_ble_io_capabilities_req 2: i_keys=0x%x r_keys=0x%x (bit 0-LTK 1-IRK 2-CSRK)", 1455 p_data->init_keys, 1456 p_data->resp_keys); 1457 1458 /* if authentication requires MITM protection, put on the mask */ 1459 if (p_dev_rec->security_required & BTM_SEC_IN_MITM) 1460 p_data->auth_req |= BTM_LE_AUTH_REQ_MITM; 1461 1462 if (!(p_data->auth_req & SMP_AUTH_BOND)) 1463 { 1464 BTM_TRACE_DEBUG0("Non bonding: No keys should be exchanged"); 1465 p_data->init_keys = 0; 1466 p_data->resp_keys = 0; 1467 } 1468 1469 BTM_TRACE_DEBUG1 ("btm_ble_io_capabilities_req 3: auth_req:%d", p_data->auth_req); 1470 BTM_TRACE_DEBUG2 ("btm_ble_io_capabilities_req 4: i_keys=0x%x r_keys=0x%x", 1471 p_data->init_keys, 1472 p_data->resp_keys); 1473 1474 BTM_TRACE_DEBUG2 ("btm_ble_io_capabilities_req 5: p_data->io_cap = %d auth_req:%d", 1475 p_data->io_cap, p_data->auth_req); 1476 1477 /* remove MITM protection requirement if IO cap does not allow it */ 1478 if ((p_data->io_cap == BTM_IO_CAP_NONE) && p_data->oob_data == SMP_OOB_NONE) 1479 p_data->auth_req &= ~BTM_LE_AUTH_REQ_MITM; 1480 1481 BTM_TRACE_DEBUG3 ("btm_ble_io_capabilities_req 6: IO_CAP:%d oob_data:%d auth_req:%d", 1482 p_data->io_cap, p_data->oob_data, p_data->auth_req); 1483 } 1484 return callback_rc; 1485 } 1486 1487 /******************************************************************************* 1488 ** 1489 ** Function btm_ble_connected 1490 ** 1491 ** Description This function is when a LE connection to the peer device is 1492 ** establsihed 1493 ** 1494 ** Returns void 1495 ** 1496 *******************************************************************************/ 1497 void btm_ble_connected (UINT8 *bda, UINT16 handle, UINT8 enc_mode, UINT8 role, 1498 tBLE_ADDR_TYPE addr_type, BOOLEAN addr_matched) 1499 { 1500 tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (bda); 1501 tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb; 1502 1503 BTM_TRACE_EVENT0 ("btm_ble_connected"); 1504 1505 /* Commenting out trace due to obf/compilation problems. 1506 */ 1507 #if (BT_USE_TRACES == TRUE) 1508 if (p_dev_rec) 1509 { 1510 BTM_TRACE_EVENT4 ("Security Manager: btm_sec_connected : handle:%d enc_mode:%d bda:%x RName:%s", 1511 handle, enc_mode, 1512 (bda[2]<<24)+(bda[3]<<16)+(bda[4]<<8)+bda[5], 1513 p_dev_rec->sec_bd_name); 1514 1515 BTM_TRACE_DEBUG1 ("btm_ble_connected sec_flags=0x%x",p_dev_rec->sec_flags); 1516 } 1517 else 1518 { 1519 BTM_TRACE_EVENT3 ("Security Manager: btm_sec_connected: handle:%d enc_mode:%d bda:%x ", 1520 handle, enc_mode, 1521 (bda[2]<<24)+(bda[3]<<16)+(bda[4]<<8)+bda[5]); 1522 } 1523 #endif 1524 1525 if (!p_dev_rec) 1526 { 1527 /* There is no device record for new connection. Allocate one */ 1528 p_dev_rec = btm_sec_alloc_dev (bda); 1529 } 1530 else /* Update the timestamp for this device */ 1531 { 1532 p_dev_rec->timestamp = btm_cb.dev_rec_count++; 1533 } 1534 1535 /* update device information */ 1536 p_dev_rec->device_type |= BT_DEVICE_TYPE_BLE; 1537 p_dev_rec->hci_handle = handle; 1538 p_dev_rec->ble.ble_addr_type = addr_type; 1539 1540 if (role == HCI_ROLE_MASTER) 1541 p_dev_rec->role_master = TRUE; 1542 1543 if (role == HCI_ROLE_SLAVE) 1544 p_cb->inq_var.adv_mode = BTM_BLE_ADV_DISABLE; 1545 p_cb->inq_var.directed_conn = FALSE; 1546 1547 return; 1548 } 1549 1550 /***************************************************************************** 1551 ** Function btm_ble_conn_complete 1552 ** 1553 ** Description LE connection complete. 1554 ** 1555 ******************************************************************************/ 1556 void btm_ble_conn_complete(UINT8 *p, UINT16 evt_len) 1557 { 1558 UINT8 role, status, bda_type; 1559 UINT16 handle; 1560 BD_ADDR bda; 1561 UINT16 conn_interval, conn_latency, conn_timeout; 1562 BOOLEAN match = FALSE; 1563 1564 STREAM_TO_UINT8 (status, p); 1565 STREAM_TO_UINT16 (handle, p); 1566 STREAM_TO_UINT8 (role, p); 1567 STREAM_TO_UINT8 (bda_type, p); 1568 STREAM_TO_BDADDR (bda, p); 1569 1570 if (status == 0) 1571 { 1572 STREAM_TO_UINT16 (conn_interval, p); 1573 STREAM_TO_UINT16 (conn_latency, p); 1574 STREAM_TO_UINT16 (conn_timeout, p); 1575 handle = HCID_GET_HANDLE (handle); 1576 1577 btm_ble_connected(bda, handle, HCI_ENCRYPT_MODE_DISABLED, role, bda_type, match); 1578 l2cble_conn_comp (handle, role, bda, bda_type, conn_interval, 1579 conn_latency, conn_timeout); 1580 } 1581 else 1582 { 1583 role = HCI_ROLE_UNKNOWN; 1584 1585 if (status == HCI_ERR_DIRECTED_ADVERTISING_TIMEOUT) 1586 btm_ble_dir_adv_tout(); 1587 } 1588 1589 btm_ble_set_conn_st(BLE_CONN_IDLE); 1590 1591 btm_ble_update_mode_operation(role, bda, TRUE); 1592 } 1593 1594 /***************************************************************************** 1595 ** Function btm_proc_smp_cback 1596 ** 1597 ** Description This function is the SMP callback handler. 1598 ** 1599 ******************************************************************************/ 1600 UINT8 btm_proc_smp_cback(tSMP_EVT event, BD_ADDR bd_addr, tSMP_EVT_DATA *p_data) 1601 { 1602 tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (bd_addr); 1603 UINT8 res = 0; 1604 1605 BTM_TRACE_DEBUG1 ("btm_proc_smp_cback event = %d", event); 1606 1607 if (p_dev_rec != NULL) 1608 { 1609 switch (event) 1610 { 1611 case SMP_IO_CAP_REQ_EVT: 1612 btm_ble_io_capabilities_req(p_dev_rec, (tBTM_LE_IO_REQ *)&p_data->io_req); 1613 break; 1614 1615 case SMP_PASSKEY_REQ_EVT: 1616 case SMP_PASSKEY_NOTIF_EVT: 1617 case SMP_OOB_REQ_EVT: 1618 p_dev_rec->sec_flags |= BTM_SEC_LINK_KEY_AUTHED; 1619 case SMP_SEC_REQUEST_EVT: 1620 memcpy (btm_cb.pairing_bda, bd_addr, BD_ADDR_LEN); 1621 p_dev_rec->sec_state = BTM_SEC_STATE_AUTHENTICATING; 1622 /* fall through */ 1623 case SMP_COMPLT_EVT: 1624 if (btm_cb.api.p_le_callback) 1625 { 1626 /* the callback function implementation may change the IO capability... */ 1627 BTM_TRACE_DEBUG1 ("btm_cb.api.p_le_callback=0x%x", btm_cb.api.p_le_callback ); 1628 (*btm_cb.api.p_le_callback) (event, bd_addr, (tBTM_LE_EVT_DATA *)p_data); 1629 } 1630 1631 if (event == SMP_COMPLT_EVT) 1632 { 1633 BTM_TRACE_DEBUG2 ("evt=SMP_COMPLT_EVT before update sec_level=0x%x sec_flags=0x%x", p_data->cmplt.sec_level , p_dev_rec->sec_flags ); 1634 1635 res = (p_data->cmplt.reason == SMP_SUCCESS) ? BTM_SUCCESS : BTM_ERR_PROCESSING; 1636 1637 BTM_TRACE_DEBUG3 ("after update result=%d sec_level=0x%x sec_flags=0x%x", 1638 res, p_data->cmplt.sec_level , p_dev_rec->sec_flags ); 1639 1640 btm_sec_dev_rec_cback_event(p_dev_rec, res); 1641 1642 if (p_data->cmplt.is_pair_cancel && btm_cb.api.p_bond_cancel_cmpl_callback ) 1643 { 1644 BTM_TRACE_DEBUG0 ("Pairing Cancel completed"); 1645 (*btm_cb.api.p_bond_cancel_cmpl_callback)(BTM_SUCCESS); 1646 } 1647 #if BTM_BLE_CONFORMANCE_TESTING == TRUE 1648 if (res != BTM_SUCCESS) 1649 { 1650 if (!btm_cb.devcb.no_disc_if_pair_fail && p_data->cmplt.reason != SMP_CONN_TOUT) 1651 { 1652 BTM_TRACE_DEBUG0 ("Pairing failed - Remove ACL"); 1653 btm_remove_acl(bd_addr); 1654 } 1655 else 1656 { 1657 BTM_TRACE_DEBUG0 ("Pairing failed - Not Removing ACL"); 1658 p_dev_rec->sec_state = BTM_SEC_STATE_IDLE; 1659 } 1660 } 1661 #else 1662 if (res != BTM_SUCCESS && p_data->cmplt.reason != SMP_CONN_TOUT) 1663 btm_remove_acl(bd_addr); 1664 #endif 1665 1666 BTM_TRACE_DEBUG3 ("btm_cb pairing_state=%x pairing_flags=%x pin_code_len=%x", 1667 btm_cb.pairing_state, 1668 btm_cb.pairing_flags, 1669 btm_cb.pin_code_len ); 1670 BTM_TRACE_DEBUG6 ("btm_cb.pairing_bda %02x:%02x:%02x:%02x:%02x:%02x", 1671 btm_cb.pairing_bda[0], btm_cb.pairing_bda[1], btm_cb.pairing_bda[2], 1672 btm_cb.pairing_bda[3], btm_cb.pairing_bda[4], btm_cb.pairing_bda[5]); 1673 1674 memset (btm_cb.pairing_bda, 0xff, BD_ADDR_LEN); 1675 btm_cb.pairing_state = BTM_PAIR_STATE_IDLE; 1676 btm_cb.pairing_flags = 0; 1677 } 1678 break; 1679 1680 default: 1681 BTM_TRACE_DEBUG1 ("unknown event = %d", event); 1682 break; 1683 1684 1685 } 1686 } 1687 else 1688 { 1689 BTM_TRACE_ERROR0("btm_proc_smp_cback received for unknown device"); 1690 } 1691 1692 return 0; 1693 } 1694 1695 #endif /* SMP_INCLUDED */ 1696 #endif /* BLE_INCLUDED */ 1697 1698 1699 /******************************************************************************* 1700 ** 1701 ** Function BTM_BleDataSignature 1702 ** 1703 ** Description This function is called to sign the data using AES128 CMAC 1704 ** algorith. 1705 ** 1706 ** Parameter bd_addr: target device the data to be signed for. 1707 ** p_text: singing data 1708 ** len: length of the data to be signed. 1709 ** signature: output parameter where data signature is going to 1710 ** be stored. 1711 ** 1712 ** Returns TRUE if signing sucessul, otherwise FALSE. 1713 ** 1714 *******************************************************************************/ 1715 BOOLEAN BTM_BleDataSignature (BD_ADDR bd_addr, UINT8 *p_text, UINT16 len, 1716 BLE_SIGNATURE signature) 1717 { 1718 BOOLEAN ret = FALSE; 1719 #if (BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE) 1720 tBTM_SEC_DEV_REC *p_rec = btm_find_dev (bd_addr); 1721 UINT8 *p_buf, *pp; 1722 1723 BT_OCTET16 er; 1724 UINT16 div; 1725 UINT8 temp[4]; /* for (r || DIV) r=1*/ 1726 UINT16 r=1; 1727 UINT8 *p=temp, *p_mac = (UINT8 *)signature; 1728 tSMP_ENC output; 1729 BT_OCTET16 local_csrk; 1730 1731 BTM_TRACE_DEBUG0 ("BTM_BleDataSignature"); 1732 if (p_rec == NULL) 1733 { 1734 BTM_TRACE_ERROR0("data signing can not be done from unknow device"); 1735 } 1736 else 1737 { 1738 if ((p_buf = (UINT8 *)GKI_getbuf((UINT16)(len + 4))) != NULL) 1739 { 1740 BTM_TRACE_DEBUG0("Start to generate Local CSRK"); 1741 pp = p_buf; 1742 /* prepare plain text */ 1743 if (p_text) 1744 { 1745 memcpy(p_buf, p_text, len); 1746 pp = (p_buf + len); 1747 } 1748 1749 #if BTM_BLE_CONFORMANCE_TESTING == TRUE 1750 if ( btm_cb.devcb.enable_test_local_sign_cntr) 1751 { 1752 BTM_TRACE_DEBUG1 ("Use Test local counter value from script counter_val=%d", btm_cb.devcb.test_local_sign_cntr); 1753 UINT32_TO_STREAM(pp, btm_cb.devcb.test_local_sign_cntr); 1754 } 1755 else 1756 { 1757 UINT32_TO_STREAM(pp, p_rec->ble.keys.local_counter); 1758 } 1759 #else 1760 UINT32_TO_STREAM(pp, p_rec->ble.keys.local_counter); 1761 #endif 1762 /* compute local csrk */ 1763 if (btm_get_local_div(bd_addr, &div)) 1764 { 1765 BTM_TRACE_DEBUG1 ("compute_csrk div=%x", div); 1766 BTM_GetDeviceEncRoot(er); 1767 1768 /* CSRK = d1(ER, DIV, 1) */ 1769 UINT16_TO_STREAM(p, div); 1770 UINT16_TO_STREAM(p, r); 1771 1772 if (!SMP_Encrypt(er, BT_OCTET16_LEN, temp, 4, &output)) 1773 { 1774 BTM_TRACE_ERROR0("Local CSRK generation failed "); 1775 } 1776 else 1777 { 1778 BTM_TRACE_DEBUG0("local CSRK generation success"); 1779 memcpy((void *)local_csrk, output.param_buf, BT_OCTET16_LEN); 1780 1781 1782 #if BTM_BLE_CONFORMANCE_TESTING == TRUE 1783 if (btm_cb.devcb.enable_test_local_sign_cntr) 1784 { 1785 UINT32_TO_STREAM(p_mac, btm_cb.devcb.test_local_sign_cntr); 1786 } 1787 else 1788 { 1789 UINT32_TO_STREAM(p_mac, p_rec->ble.keys.local_counter); 1790 } 1791 #else 1792 UINT32_TO_STREAM(p_mac, p_rec->ble.keys.local_counter); 1793 #endif 1794 1795 if ((ret = AES_CMAC(local_csrk, p_buf, (UINT16)(len + 4), BTM_CMAC_TLEN_SIZE, p_mac)) == TRUE) 1796 { 1797 btm_ble_increment_sign_ctr(bd_addr, TRUE); 1798 1799 #if BTM_BLE_CONFORMANCE_TESTING == TRUE 1800 if ( btm_cb.devcb.enable_test_mac_val) 1801 { 1802 BTM_TRACE_DEBUG0 ("Use MAC value from script"); 1803 memcpy(p_mac, btm_cb.devcb.test_mac, BTM_CMAC_TLEN_SIZE); 1804 } 1805 #endif 1806 } 1807 BTM_TRACE_DEBUG1("BTM_BleDataSignature p_mac = %d", p_mac); 1808 BTM_TRACE_DEBUG4("p_mac[0] = 0x%02x p_mac[1] = 0x%02x p_mac[2] = 0x%02x p_mac[3] = 0x%02x", 1809 *p_mac, *(p_mac + 1), *(p_mac + 2), *(p_mac + 3)); 1810 BTM_TRACE_DEBUG4("p_mac[4] = 0x%02x p_mac[5] = 0x%02x p_mac[6] = 0x%02x p_mac[7] = 0x%02x", 1811 *(p_mac + 4), *(p_mac + 5), *(p_mac + 6), *(p_mac + 7)); 1812 1813 GKI_freebuf(p_buf); 1814 } 1815 } 1816 } 1817 } 1818 #endif /* BLE_INCLUDED */ 1819 return ret; 1820 } 1821 1822 /******************************************************************************* 1823 ** 1824 ** Function BTM_BleVerifySignature 1825 ** 1826 ** Description This function is called to verify the data signature 1827 ** 1828 ** Parameter bd_addr: target device the data to be signed for. 1829 ** p_orig: original data before signature. 1830 ** len: length of the signing data 1831 ** counter: counter used when doing data signing 1832 ** p_comp: signature to be compared against. 1833 1834 ** Returns TRUE if signature verified correctly; otherwise FALSE. 1835 ** 1836 *******************************************************************************/ 1837 BOOLEAN BTM_BleVerifySignature (BD_ADDR bd_addr, UINT8 *p_orig, UINT16 len, UINT32 counter, 1838 UINT8 *p_comp) 1839 { 1840 BOOLEAN verified = FALSE; 1841 #if (BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE) 1842 tBTM_SEC_DEV_REC *p_rec = btm_find_dev (bd_addr); 1843 UINT8 p_mac[BTM_CMAC_TLEN_SIZE]; 1844 1845 if (p_rec == NULL || (p_rec && !(p_rec->ble.key_type & BTM_LE_KEY_PCSRK))) 1846 { 1847 BTM_TRACE_ERROR0("can not verify signature for unknown device"); 1848 } 1849 else if (counter < p_rec->ble.keys.counter) 1850 { 1851 BTM_TRACE_ERROR0("signature received with out dated sign counter"); 1852 } 1853 else if (p_orig == NULL) 1854 { 1855 BTM_TRACE_ERROR0("No signature to verify"); 1856 } 1857 else 1858 { 1859 BTM_TRACE_DEBUG2 ("BTM_BleVerifySignature rcv_cnt=%d >= expected_cnt=%d", counter, p_rec->ble.keys.counter); 1860 1861 if (AES_CMAC(p_rec->ble.keys.csrk, p_orig, len, BTM_CMAC_TLEN_SIZE, p_mac)) 1862 { 1863 if (memcmp(p_mac, p_comp, BTM_CMAC_TLEN_SIZE) == 0) 1864 { 1865 btm_ble_increment_sign_ctr(bd_addr, FALSE); 1866 verified = TRUE; 1867 } 1868 } 1869 } 1870 #endif /* BLE_INCLUDED */ 1871 return verified; 1872 } 1873 1874 #if BLE_INCLUDED == TRUE 1875 /******************************************************************************* 1876 ** Utility functions for LE device IR/ER generation 1877 *******************************************************************************/ 1878 /******************************************************************************* 1879 ** 1880 ** Function btm_notify_new_key 1881 ** 1882 ** Description This function is to notify application new keys have been 1883 ** generated. 1884 ** 1885 ** Returns void 1886 ** 1887 *******************************************************************************/ 1888 static void btm_notify_new_key(UINT8 key_type) 1889 { 1890 tBTM_BLE_LOCAL_KEYS *p_locak_keys = NULL; 1891 1892 BTM_TRACE_DEBUG1 ("btm_notify_new_key key_type=%d", key_type); 1893 1894 if (btm_cb.api.p_le_key_callback) 1895 { 1896 switch (key_type) 1897 { 1898 case BTM_BLE_KEY_TYPE_ID: 1899 BTM_TRACE_DEBUG0 ("BTM_BLE_KEY_TYPE_ID"); 1900 p_locak_keys = (tBTM_BLE_LOCAL_KEYS *)&btm_cb.devcb.id_keys; 1901 break; 1902 1903 case BTM_BLE_KEY_TYPE_ER: 1904 BTM_TRACE_DEBUG0 ("BTM_BLE_KEY_TYPE_ER"); 1905 p_locak_keys = (tBTM_BLE_LOCAL_KEYS *)&btm_cb.devcb.er; 1906 break; 1907 1908 default: 1909 BTM_TRACE_ERROR1("unknown key type: %d", key_type); 1910 break; 1911 } 1912 if (p_locak_keys != NULL) 1913 (*btm_cb.api.p_le_key_callback) (key_type, p_locak_keys); 1914 } 1915 } 1916 1917 /******************************************************************************* 1918 ** 1919 ** Function btm_ble_process_er2 1920 ** 1921 ** Description This function is called when ER is generated, store it in 1922 ** local control block. 1923 ** 1924 ** Returns void 1925 ** 1926 *******************************************************************************/ 1927 static void btm_ble_process_er2(tBTM_RAND_ENC *p) 1928 { 1929 BTM_TRACE_DEBUG0 ("btm_ble_process_er2"); 1930 1931 if (p &&p->opcode == HCI_BLE_RAND) 1932 { 1933 memcpy(&btm_cb.devcb.er[8], p->param_buf, BT_OCTET8_LEN); 1934 btm_notify_new_key(BTM_BLE_KEY_TYPE_ER); 1935 } 1936 else 1937 { 1938 BTM_TRACE_ERROR0("Generating ER2 exception."); 1939 memset(&btm_cb.devcb.er, 0, sizeof(BT_OCTET16)); 1940 } 1941 } 1942 1943 /******************************************************************************* 1944 ** 1945 ** Function btm_ble_process_er 1946 ** 1947 ** Description This function is called when ER is generated, store it in 1948 ** local control block. 1949 ** 1950 ** Returns void 1951 ** 1952 *******************************************************************************/ 1953 static void btm_ble_process_er(tBTM_RAND_ENC *p) 1954 { 1955 BTM_TRACE_DEBUG0 ("btm_ble_process_er"); 1956 1957 if (p &&p->opcode == HCI_BLE_RAND) 1958 { 1959 memcpy(&btm_cb.devcb.er[0], p->param_buf, BT_OCTET8_LEN); 1960 1961 if (!btsnd_hcic_ble_rand((void *)btm_ble_process_er2)) 1962 { 1963 memset(&btm_cb.devcb.er, 0, sizeof(BT_OCTET16)); 1964 BTM_TRACE_ERROR0("Generating ER2 failed."); 1965 } 1966 } 1967 else 1968 { 1969 BTM_TRACE_ERROR0("Generating ER1 exception."); 1970 } 1971 } 1972 1973 /******************************************************************************* 1974 ** 1975 ** Function btm_ble_process_irk 1976 ** 1977 ** Description This function is called when IRK is generated, store it in 1978 ** local control block. 1979 ** 1980 ** Returns void 1981 ** 1982 *******************************************************************************/ 1983 static void btm_ble_process_irk(tSMP_ENC *p) 1984 { 1985 BTM_TRACE_DEBUG0 ("btm_ble_process_irk"); 1986 if (p &&p->opcode == HCI_BLE_ENCRYPT) 1987 { 1988 memcpy(btm_cb.devcb.id_keys.irk, p->param_buf, BT_OCTET16_LEN); 1989 btm_notify_new_key(BTM_BLE_KEY_TYPE_ID); 1990 } 1991 else 1992 { 1993 BTM_TRACE_ERROR0("Generating IRK exception."); 1994 } 1995 1996 /* proceed generate ER */ 1997 if (!btsnd_hcic_ble_rand((void *)btm_ble_process_er)) 1998 { 1999 BTM_TRACE_ERROR0("Generating ER failed."); 2000 } 2001 } 2002 2003 /******************************************************************************* 2004 ** 2005 ** Function btm_ble_process_dhk 2006 ** 2007 ** Description This function is called when DHK is calculated, store it in 2008 ** local control block, and proceed to generate ER, a 128-bits 2009 ** random number. 2010 ** 2011 ** Returns void 2012 ** 2013 *******************************************************************************/ 2014 static void btm_ble_process_dhk(tSMP_ENC *p) 2015 { 2016 #if SMP_INCLUDED == TRUE 2017 UINT8 btm_ble_irk_pt = 0x01; 2018 tSMP_ENC output; 2019 2020 BTM_TRACE_DEBUG0 ("btm_ble_process_dhk"); 2021 2022 if (p && p->opcode == HCI_BLE_ENCRYPT) 2023 { 2024 memcpy(btm_cb.devcb.id_keys.dhk, p->param_buf, BT_OCTET16_LEN); 2025 BTM_TRACE_DEBUG0("BLE DHK generated."); 2026 2027 /* IRK = D1(IR, 1) */ 2028 if (!SMP_Encrypt(btm_cb.devcb.id_keys.ir, BT_OCTET16_LEN, &btm_ble_irk_pt, 2029 1, &output)) 2030 { 2031 /* reset all identity root related key */ 2032 memset(&btm_cb.devcb.id_keys, 0, sizeof(tBTM_BLE_LOCAL_ID_KEYS)); 2033 } 2034 else 2035 { 2036 btm_ble_process_irk(&output); 2037 } 2038 } 2039 else 2040 { 2041 /* reset all identity root related key */ 2042 memset(&btm_cb.devcb.id_keys, 0, sizeof(tBTM_BLE_LOCAL_ID_KEYS)); 2043 } 2044 #endif 2045 } 2046 2047 /******************************************************************************* 2048 ** 2049 ** Function btm_ble_process_ir2 2050 ** 2051 ** Description This function is called when IR is generated, proceed to calculate 2052 ** DHK = Eir({0x03, 0, 0 ...}) 2053 ** 2054 ** 2055 ** Returns void 2056 ** 2057 *******************************************************************************/ 2058 static void btm_ble_process_ir2(tBTM_RAND_ENC *p) 2059 { 2060 #if SMP_INCLUDED == TRUE 2061 UINT8 btm_ble_dhk_pt = 0x03; 2062 tSMP_ENC output; 2063 2064 BTM_TRACE_DEBUG0 ("btm_ble_process_ir2"); 2065 2066 if (p && p->opcode == HCI_BLE_RAND) 2067 { 2068 /* remembering in control block */ 2069 memcpy(&btm_cb.devcb.id_keys.ir[8], p->param_buf, BT_OCTET8_LEN); 2070 /* generate DHK= Eir({0x03, 0x00, 0x00 ...}) */ 2071 2072 2073 SMP_Encrypt(btm_cb.devcb.id_keys.ir, BT_OCTET16_LEN, &btm_ble_dhk_pt, 2074 1, &output); 2075 btm_ble_process_dhk(&output); 2076 2077 BTM_TRACE_DEBUG0("BLE IR generated."); 2078 } 2079 else 2080 { 2081 memset(&btm_cb.devcb.id_keys, 0, sizeof(tBTM_BLE_LOCAL_ID_KEYS)); 2082 } 2083 #endif 2084 } 2085 2086 /******************************************************************************* 2087 ** 2088 ** Function btm_ble_process_ir 2089 ** 2090 ** Description This function is called when IR is generated, proceed to calculate 2091 ** DHK = Eir({0x02, 0, 0 ...}) 2092 ** 2093 ** 2094 ** Returns void 2095 ** 2096 *******************************************************************************/ 2097 static void btm_ble_process_ir(tBTM_RAND_ENC *p) 2098 { 2099 BTM_TRACE_DEBUG0 ("btm_ble_process_ir"); 2100 2101 if (p && p->opcode == HCI_BLE_RAND) 2102 { 2103 /* remembering in control block */ 2104 memcpy(btm_cb.devcb.id_keys.ir, p->param_buf, BT_OCTET8_LEN); 2105 2106 if (!btsnd_hcic_ble_rand((void *)btm_ble_process_ir2)) 2107 { 2108 BTM_TRACE_ERROR0("Generating IR2 failed."); 2109 memset(&btm_cb.devcb.id_keys, 0, sizeof(tBTM_BLE_LOCAL_ID_KEYS)); 2110 } 2111 } 2112 } 2113 2114 /******************************************************************************* 2115 ** 2116 ** Function btm_ble_reset_id 2117 ** 2118 ** Description This function is called to reset LE device identity. 2119 ** 2120 ** Returns void 2121 ** 2122 *******************************************************************************/ 2123 void btm_ble_reset_id( void ) 2124 { 2125 BTM_TRACE_DEBUG0 ("btm_ble_reset_id"); 2126 2127 /* regenrate Identity Root*/ 2128 if (!btsnd_hcic_ble_rand((void *)btm_ble_process_ir)) 2129 { 2130 BTM_TRACE_DEBUG0("Generating IR failed."); 2131 } 2132 } 2133 2134 #if BTM_BLE_CONFORMANCE_TESTING == TRUE 2135 /******************************************************************************* 2136 ** 2137 ** Function btm_ble_set_no_disc_if_pair_fail 2138 ** 2139 ** Description This function indicates that whether no disconnect of the ACL 2140 ** should be used if pairing failed 2141 ** 2142 ** Returns void 2143 ** 2144 *******************************************************************************/ 2145 void btm_ble_set_no_disc_if_pair_fail(BOOLEAN disable_disc ) 2146 { 2147 BTM_TRACE_DEBUG1 ("btm_ble_set_disc_enable_if_pair_fail disable_disc=%d", disable_disc); 2148 btm_cb.devcb.no_disc_if_pair_fail = disable_disc; 2149 } 2150 2151 /******************************************************************************* 2152 ** 2153 ** Function btm_ble_set_test_mac_value 2154 ** 2155 ** Description This function set test MAC value 2156 ** 2157 ** Returns void 2158 ** 2159 *******************************************************************************/ 2160 void btm_ble_set_test_mac_value(BOOLEAN enable, UINT8 *p_test_mac_val ) 2161 { 2162 BTM_TRACE_DEBUG1 ("btm_ble_set_test_mac_value enable=%d", enable); 2163 btm_cb.devcb.enable_test_mac_val = enable; 2164 memcpy(btm_cb.devcb.test_mac, p_test_mac_val, BT_OCTET8_LEN); 2165 } 2166 2167 /******************************************************************************* 2168 ** 2169 ** Function btm_ble_set_test_local_sign_cntr_value 2170 ** 2171 ** Description This function set test local sign counter value 2172 ** 2173 ** Returns void 2174 ** 2175 *******************************************************************************/ 2176 void btm_ble_set_test_local_sign_cntr_value(BOOLEAN enable, UINT32 test_local_sign_cntr ) 2177 { 2178 BTM_TRACE_DEBUG2 ("btm_ble_set_test_local_sign_cntr_value enable=%d local_sign_cntr=%d", 2179 enable, test_local_sign_cntr); 2180 btm_cb.devcb.enable_test_local_sign_cntr = enable; 2181 btm_cb.devcb.test_local_sign_cntr = test_local_sign_cntr; 2182 } 2183 2184 /******************************************************************************* 2185 ** 2186 ** Function btm_set_random_address 2187 ** 2188 ** Description This function set a random address to local controller. 2189 ** 2190 ** Returns void 2191 ** 2192 *******************************************************************************/ 2193 void btm_set_random_address(BD_ADDR random_bda) 2194 { 2195 tBTM_LE_RANDOM_CB *p_cb = &btm_cb.ble_ctr_cb.addr_mgnt_cb; 2196 BOOLEAN adv_mode = btm_cb.ble_ctr_cb.inq_var.adv_mode ; 2197 2198 BTM_TRACE_DEBUG0 ("btm_set_random_address"); 2199 2200 if (adv_mode == BTM_BLE_ADV_ENABLE) 2201 btsnd_hcic_ble_set_adv_enable (BTM_BLE_ADV_DISABLE); 2202 2203 memcpy(p_cb->private_addr, random_bda, BD_ADDR_LEN); 2204 btsnd_hcic_ble_set_random_addr(p_cb->private_addr); 2205 2206 if (adv_mode == BTM_BLE_ADV_ENABLE) 2207 btsnd_hcic_ble_set_adv_enable (BTM_BLE_ADV_ENABLE); 2208 2209 2210 } 2211 #endif /* BTM_BLE_CONFORMANCE_TESTING */ 2212 2213 2214 #endif /* BLE_INCLUDED */ 2215
