1 // SPDX-License-Identifier: GPL-2.0 2 /* Author: Dmitry Safonov <dima@arista.com> */ 3 #include <inttypes.h> 4 #include "../../../../include/linux/kernel.h" 5 #include "aolib.h" 6 7 const size_t nr_packets = 20; 8 const size_t msg_len = 100; 9 const size_t quota = nr_packets * msg_len; 10 union tcp_addr wrong_addr; 11 #define SECOND_PASSWORD "at all times sincere friends of freedom have been rare" 12 #define fault(type) (inj == FAULT_ ## type) 13 14 static const int test_vrf_ifindex = 200; 15 static const uint8_t test_vrf_tabid = 42; 16 static void setup_vrfs(void) 17 { 18 int err; 19 20 if (!kernel_config_has(KCONFIG_NET_VRF)) 21 return; 22 23 err = add_vrf("ksft-vrf", test_vrf_tabid, test_vrf_ifindex, -1); 24 if (err) 25 test_error("Failed to add a VRF: %d", err); 26 27 err = link_set_up("ksft-vrf"); 28 if (err) 29 test_error("Failed to bring up a VRF"); 30 31 err = ip_route_add_vrf(veth_name, TEST_FAMILY, 32 this_ip_addr, this_ip_dest, test_vrf_tabid); 33 if (err) 34 test_error("Failed to add a route to VRF"); 35 } 36 37 38 static int prepare_sk(union tcp_addr *addr, uint8_t sndid, uint8_t rcvid) 39 { 40 int sk = socket(test_family, SOCK_STREAM, IPPROTO_TCP); 41 42 if (sk < 0) 43 test_error("socket()"); 44 45 if (test_add_key(sk, DEFAULT_TEST_PASSWORD, this_ip_dest, 46 DEFAULT_TEST_PREFIX, 100, 100)) 47 test_error("test_add_key()"); 48 49 if (addr && test_add_key(sk, SECOND_PASSWORD, *addr, 50 DEFAULT_TEST_PREFIX, sndid, rcvid)) 51 test_error("test_add_key()"); 52 53 return sk; 54 } 55 56 static int prepare_lsk(union tcp_addr *addr, uint8_t sndid, uint8_t rcvid) 57 { 58 int sk = prepare_sk(addr, sndid, rcvid); 59 60 if (listen(sk, 10)) 61 test_error("listen()"); 62 63 return sk; 64 } 65 66 static int test_del_key(int sk, uint8_t sndid, uint8_t rcvid, bool async, 67 int current_key, int rnext_key) 68 { 69 struct tcp_ao_info_opt ao_info = {}; 70 struct tcp_ao_getsockopt key = {}; 71 struct tcp_ao_del del = {}; 72 sockaddr_af sockaddr; 73 int err; 74 75 tcp_addr_to_sockaddr_in(&del.addr, &this_ip_dest, 0); 76 del.prefix = DEFAULT_TEST_PREFIX; 77 del.sndid = sndid; 78 del.rcvid = rcvid; 79 80 if (current_key >= 0) { 81 del.set_current = 1; 82 del.current_key = (uint8_t)current_key; 83 } 84 if (rnext_key >= 0) { 85 del.set_rnext = 1; 86 del.rnext = (uint8_t)rnext_key; 87 } 88 89 err = setsockopt(sk, IPPROTO_TCP, TCP_AO_DEL_KEY, &del, sizeof(del)); 90 if (err < 0) 91 return -errno; 92 93 if (async) 94 return 0; 95 96 tcp_addr_to_sockaddr_in(&sockaddr, &this_ip_dest, 0); 97 err = test_get_one_ao(sk, &key, &sockaddr, sizeof(sockaddr), 98 DEFAULT_TEST_PREFIX, sndid, rcvid); 99 if (!err) 100 return -EEXIST; 101 if (err != -E2BIG) 102 test_error("getsockopt()"); 103 if (current_key < 0 && rnext_key < 0) 104 return 0; 105 if (test_get_ao_info(sk, &ao_info)) 106 test_error("getsockopt(TCP_AO_INFO) failed"); 107 if (current_key >= 0 && ao_info.current_key != (uint8_t)current_key) 108 return -ENOTRECOVERABLE; 109 if (rnext_key >= 0 && ao_info.rnext != (uint8_t)rnext_key) 110 return -ENOTRECOVERABLE; 111 return 0; 112 } 113 114 static void try_delete_key(char *tst_name, int sk, uint8_t sndid, uint8_t rcvid, 115 bool async, int current_key, int rnext_key, 116 fault_t inj) 117 { 118 int err; 119 120 err = test_del_key(sk, sndid, rcvid, async, current_key, rnext_key); 121 if ((err == -EBUSY && fault(BUSY)) || (err == -EINVAL && fault(CURRNEXT))) { 122 test_ok("%s: key deletion was prevented", tst_name); 123 return; 124 } 125 if (err && fault(FIXME)) { 126 test_xfail("%s: failed to delete the key %u:%u %d", 127 tst_name, sndid, rcvid, err); 128 return; 129 } 130 if (!err) { 131 if (fault(BUSY) || fault(CURRNEXT)) { 132 test_fail("%s: the key was deleted %u:%u %d", tst_name, 133 sndid, rcvid, err); 134 } else { 135 test_ok("%s: the key was deleted", tst_name); 136 } 137 return; 138 } 139 test_fail("%s: can't delete the key %u:%u %d", tst_name, sndid, rcvid, err); 140 } 141 142 static int test_set_key(int sk, int current_keyid, int rnext_keyid) 143 { 144 struct tcp_ao_info_opt ao_info = {}; 145 int err; 146 147 if (current_keyid >= 0) { 148 ao_info.set_current = 1; 149 ao_info.current_key = (uint8_t)current_keyid; 150 } 151 if (rnext_keyid >= 0) { 152 ao_info.set_rnext = 1; 153 ao_info.rnext = (uint8_t)rnext_keyid; 154 } 155 156 err = test_set_ao_info(sk, &ao_info); 157 if (err) 158 return err; 159 if (test_get_ao_info(sk, &ao_info)) 160 test_error("getsockopt(TCP_AO_INFO) failed"); 161 if (current_keyid >= 0 && ao_info.current_key != (uint8_t)current_keyid) 162 return -ENOTRECOVERABLE; 163 if (rnext_keyid >= 0 && ao_info.rnext != (uint8_t)rnext_keyid) 164 return -ENOTRECOVERABLE; 165 return 0; 166 } 167 168 static int test_add_current_rnext_key(int sk, const char *key, uint8_t keyflags, 169 union tcp_addr in_addr, uint8_t prefix, 170 bool set_current, bool set_rnext, 171 uint8_t sndid, uint8_t rcvid) 172 { 173 struct tcp_ao_add tmp = {}; 174 int err; 175 176 err = test_prepare_key(&tmp, DEFAULT_TEST_ALGO, in_addr, 177 set_current, set_rnext, 178 prefix, 0, sndid, rcvid, 0, keyflags, 179 strlen(key), key); 180 if (err) 181 return err; 182 183 184 err = setsockopt(sk, IPPROTO_TCP, TCP_AO_ADD_KEY, &tmp, sizeof(tmp)); 185 if (err < 0) 186 return -errno; 187 188 return test_verify_socket_key(sk, &tmp); 189 } 190 191 static int __try_add_current_rnext_key(int sk, const char *key, uint8_t keyflags, 192 union tcp_addr in_addr, uint8_t prefix, 193 bool set_current, bool set_rnext, 194 uint8_t sndid, uint8_t rcvid) 195 { 196 struct tcp_ao_info_opt ao_info = {}; 197 int err; 198 199 err = test_add_current_rnext_key(sk, key, keyflags, in_addr, prefix, 200 set_current, set_rnext, sndid, rcvid); 201 if (err) 202 return err; 203 204 if (test_get_ao_info(sk, &ao_info)) 205 test_error("getsockopt(TCP_AO_INFO) failed"); 206 if (set_current && ao_info.current_key != sndid) 207 return -ENOTRECOVERABLE; 208 if (set_rnext && ao_info.rnext != rcvid) 209 return -ENOTRECOVERABLE; 210 return 0; 211 } 212 213 static void try_add_current_rnext_key(char *tst_name, int sk, const char *key, 214 uint8_t keyflags, 215 union tcp_addr in_addr, uint8_t prefix, 216 bool set_current, bool set_rnext, 217 uint8_t sndid, uint8_t rcvid, fault_t inj) 218 { 219 int err; 220 221 err = __try_add_current_rnext_key(sk, key, keyflags, in_addr, prefix, 222 set_current, set_rnext, sndid, rcvid); 223 if (!err && !fault(CURRNEXT)) { 224 test_ok("%s", tst_name); 225 return; 226 } 227 if (err == -EINVAL && fault(CURRNEXT)) { 228 test_ok("%s", tst_name); 229 return; 230 } 231 test_fail("%s", tst_name); 232 } 233 234 static void check_closed_socket(void) 235 { 236 int sk; 237 238 sk = prepare_sk(&this_ip_dest, 200, 200); 239 try_delete_key("closed socket, delete a key", sk, 200, 200, 0, -1, -1, 0); 240 try_delete_key("closed socket, delete all keys", sk, 100, 100, 0, -1, -1, 0); 241 close(sk); 242 243 sk = prepare_sk(&this_ip_dest, 200, 200); 244 if (test_set_key(sk, 100, 200)) 245 test_error("failed to set current/rnext keys"); 246 try_delete_key("closed socket, delete current key", sk, 100, 100, 0, -1, -1, FAULT_BUSY); 247 try_delete_key("closed socket, delete rnext key", sk, 200, 200, 0, -1, -1, FAULT_BUSY); 248 close(sk); 249 250 sk = prepare_sk(&this_ip_dest, 200, 200); 251 if (test_add_key(sk, "Glory to heros!", this_ip_dest, 252 DEFAULT_TEST_PREFIX, 10, 11)) 253 test_error("test_add_key()"); 254 if (test_add_key(sk, "Glory to Ukraine!", this_ip_dest, 255 DEFAULT_TEST_PREFIX, 12, 13)) 256 test_error("test_add_key()"); 257 try_delete_key("closed socket, delete a key + set current/rnext", sk, 100, 100, 0, 10, 13, 0); 258 try_delete_key("closed socket, force-delete current key", sk, 10, 11, 0, 200, -1, 0); 259 try_delete_key("closed socket, force-delete rnext key", sk, 12, 13, 0, -1, 200, 0); 260 try_delete_key("closed socket, delete current+rnext key", sk, 200, 200, 0, -1, -1, FAULT_BUSY); 261 close(sk); 262 263 sk = prepare_sk(&this_ip_dest, 200, 200); 264 if (test_set_key(sk, 100, 200)) 265 test_error("failed to set current/rnext keys"); 266 try_add_current_rnext_key("closed socket, add + change current key", 267 sk, "Laaaa! Lalala-la-la-lalala...", 0, 268 this_ip_dest, DEFAULT_TEST_PREFIX, 269 true, false, 10, 20, 0); 270 try_add_current_rnext_key("closed socket, add + change rnext key", 271 sk, "Laaaa! Lalala-la-la-lalala...", 0, 272 this_ip_dest, DEFAULT_TEST_PREFIX, 273 false, true, 20, 10, 0); 274 close(sk); 275 } 276 277 static void assert_no_current_rnext(const char *tst_msg, int sk) 278 { 279 struct tcp_ao_info_opt ao_info = {}; 280 281 if (test_get_ao_info(sk, &ao_info)) 282 test_error("getsockopt(TCP_AO_INFO) failed"); 283 284 errno = 0; 285 if (ao_info.set_current || ao_info.set_rnext) { 286 test_xfail("%s: the socket has current/rnext keys: %d:%d", 287 tst_msg, 288 (ao_info.set_current) ? ao_info.current_key : -1, 289 (ao_info.set_rnext) ? ao_info.rnext : -1); 290 } else { 291 test_ok("%s: the socket has no current/rnext keys", tst_msg); 292 } 293 } 294 295 static void assert_no_tcp_repair(void) 296 { 297 struct tcp_ao_repair ao_img = {}; 298 socklen_t len = sizeof(ao_img); 299 int sk, err; 300 301 sk = prepare_sk(&this_ip_dest, 200, 200); 302 test_enable_repair(sk); 303 if (listen(sk, 10)) 304 test_error("listen()"); 305 errno = 0; 306 err = getsockopt(sk, SOL_TCP, TCP_AO_REPAIR, &ao_img, &len); 307 if (err && errno == EPERM) 308 test_ok("listen socket, getsockopt(TCP_AO_REPAIR) is restricted"); 309 else 310 test_fail("listen socket, getsockopt(TCP_AO_REPAIR) works"); 311 errno = 0; 312 err = setsockopt(sk, SOL_TCP, TCP_AO_REPAIR, &ao_img, sizeof(ao_img)); 313 if (err && errno == EPERM) 314 test_ok("listen socket, setsockopt(TCP_AO_REPAIR) is restricted"); 315 else 316 test_fail("listen socket, setsockopt(TCP_AO_REPAIR) works"); 317 close(sk); 318 } 319 320 static void check_listen_socket(void) 321 { 322 int sk, err; 323 324 sk = prepare_lsk(&this_ip_dest, 200, 200); 325 try_delete_key("listen socket, delete a key", sk, 200, 200, 0, -1, -1, 0); 326 try_delete_key("listen socket, delete all keys", sk, 100, 100, 0, -1, -1, 0); 327 close(sk); 328 329 sk = prepare_lsk(&this_ip_dest, 200, 200); 330 err = test_set_key(sk, 100, -1); 331 if (err == -EINVAL) 332 test_ok("listen socket, setting current key not allowed"); 333 else 334 test_fail("listen socket, set current key"); 335 err = test_set_key(sk, -1, 200); 336 if (err == -EINVAL) 337 test_ok("listen socket, setting rnext key not allowed"); 338 else 339 test_fail("listen socket, set rnext key"); 340 close(sk); 341 342 sk = prepare_sk(&this_ip_dest, 200, 200); 343 if (test_set_key(sk, 100, 200)) 344 test_error("failed to set current/rnext keys"); 345 if (listen(sk, 10)) 346 test_error("listen()"); 347 assert_no_current_rnext("listen() after current/rnext keys set", sk); 348 try_delete_key("listen socket, delete current key from before listen()", sk, 100, 100, 0, -1, -1, FAULT_FIXME); 349 try_delete_key("listen socket, delete rnext key from before listen()", sk, 200, 200, 0, -1, -1, FAULT_FIXME); 350 close(sk); 351 352 assert_no_tcp_repair(); 353 354 sk = prepare_lsk(&this_ip_dest, 200, 200); 355 if (test_add_key(sk, "Glory to heros!", this_ip_dest, 356 DEFAULT_TEST_PREFIX, 10, 11)) 357 test_error("test_add_key()"); 358 if (test_add_key(sk, "Glory to Ukraine!", this_ip_dest, 359 DEFAULT_TEST_PREFIX, 12, 13)) 360 test_error("test_add_key()"); 361 try_delete_key("listen socket, delete a key + set current/rnext", sk, 362 100, 100, 0, 10, 13, FAULT_CURRNEXT); 363 try_delete_key("listen socket, force-delete current key", sk, 364 10, 11, 0, 200, -1, FAULT_CURRNEXT); 365 try_delete_key("listen socket, force-delete rnext key", sk, 366 12, 13, 0, -1, 200, FAULT_CURRNEXT); 367 try_delete_key("listen socket, delete a key", sk, 368 200, 200, 0, -1, -1, 0); 369 close(sk); 370 371 sk = prepare_lsk(&this_ip_dest, 200, 200); 372 try_add_current_rnext_key("listen socket, add + change current key", 373 sk, "Laaaa! Lalala-la-la-lalala...", 0, 374 this_ip_dest, DEFAULT_TEST_PREFIX, 375 true, false, 10, 20, FAULT_CURRNEXT); 376 try_add_current_rnext_key("listen socket, add + change rnext key", 377 sk, "Laaaa! Lalala-la-la-lalala...", 0, 378 this_ip_dest, DEFAULT_TEST_PREFIX, 379 false, true, 20, 10, FAULT_CURRNEXT); 380 close(sk); 381 } 382 383 struct test_key { 384 char password[TCP_AO_MAXKEYLEN]; 385 const char *alg; 386 unsigned int len; 387 uint8_t client_keyid; 388 uint8_t server_keyid; 389 uint8_t maclen; 390 uint8_t matches_client : 1, 391 matches_server : 1, 392 matches_vrf : 1, 393 is_current : 1, 394 is_rnext : 1, 395 used_on_server_tx : 1, 396 used_on_client_tx : 1, 397 skip_counters_checks : 1; 398 }; 399 400 struct key_collection { 401 unsigned int nr_keys; 402 struct test_key *keys; 403 }; 404 405 static struct key_collection collection; 406 407 #define TEST_MAX_MACLEN 16 408 const char *test_algos[] = { "cmac(aes128)", "hmac(sha1)", "hmac(sha256)" }; 409 const unsigned int test_maclens[] = { 1, 4, 12, 16 }; 410 #define MACLEN_SHIFT 2 411 #define ALGOS_SHIFT 4 412 413 static unsigned int make_mask(unsigned int shift, unsigned int prev_shift) 414 { 415 unsigned int ret = BIT(shift) - 1; 416 417 return ret << prev_shift; 418 } 419 420 static void init_key_in_collection(unsigned int index, bool randomized) 421 { 422 struct test_key *key = &collection.keys[index]; 423 unsigned int algos_index; 424 425 /* Same for randomized and non-randomized test flows */ 426 key->client_keyid = index; 427 key->server_keyid = 127 + index; 428 key->matches_client = 1; 429 key->matches_server = 1; 430 key->matches_vrf = 1; 431 /* not really even random, but good enough for a test */ 432 key->len = rand() % (TCP_AO_MAXKEYLEN - TEST_TCP_AO_MINKEYLEN); 433 key->len += TEST_TCP_AO_MINKEYLEN; 434 randomize_buffer(key->password, key->len); 435 436 if (randomized) { 437 key->maclen = (rand() % TEST_MAX_MACLEN) + 1; 438 algos_index = rand(); 439 } else { 440 unsigned int shift = MACLEN_SHIFT; 441 442 key->maclen = test_maclens[index & make_mask(shift, 0)]; 443 algos_index = index & make_mask(ALGOS_SHIFT, shift); 444 } 445 key->alg = test_algos[algos_index % ARRAY_SIZE(test_algos)]; 446 } 447 448 static int init_default_key_collection(unsigned int nr_keys, bool randomized) 449 { 450 size_t key_sz = sizeof(collection.keys[0]); 451 452 if (!nr_keys) { 453 free(collection.keys); 454 collection.keys = NULL; 455 return 0; 456 } 457 458 /* 459 * All keys have uniq sndid/rcvid and sndid != rcvid in order to 460 * check for any bugs/issues for different keyids, visible to both 461 * peers. Keyid == 254 is unused. 462 */ 463 if (nr_keys > 127) 464 test_error("Test requires too many keys, correct the source"); 465 466 collection.keys = reallocarray(collection.keys, nr_keys, key_sz); 467 if (!collection.keys) 468 return -ENOMEM; 469 470 memset(collection.keys, 0, nr_keys * key_sz); 471 collection.nr_keys = nr_keys; 472 while (nr_keys--) 473 init_key_in_collection(nr_keys, randomized); 474 475 return 0; 476 } 477 478 static void test_key_error(const char *msg, struct test_key *key) 479 { 480 test_error("%s: key: { %s, %u:%u, %u, %u:%u:%u:%u:%u (%u)}", 481 msg, key->alg, key->client_keyid, key->server_keyid, 482 key->maclen, key->matches_client, key->matches_server, 483 key->matches_vrf, key->is_current, key->is_rnext, key->len); 484 } 485 486 static int test_add_key_cr(int sk, const char *pwd, unsigned int pwd_len, 487 union tcp_addr addr, uint8_t vrf, 488 uint8_t sndid, uint8_t rcvid, 489 uint8_t maclen, const char *alg, 490 bool set_current, bool set_rnext) 491 { 492 struct tcp_ao_add tmp = {}; 493 uint8_t keyflags = 0; 494 int err; 495 496 if (!alg) 497 alg = DEFAULT_TEST_ALGO; 498 499 if (vrf) 500 keyflags |= TCP_AO_KEYF_IFINDEX; 501 err = test_prepare_key(&tmp, alg, addr, set_current, set_rnext, 502 DEFAULT_TEST_PREFIX, vrf, sndid, rcvid, maclen, 503 keyflags, pwd_len, pwd); 504 if (err) 505 return err; 506 507 err = setsockopt(sk, IPPROTO_TCP, TCP_AO_ADD_KEY, &tmp, sizeof(tmp)); 508 if (err < 0) 509 return -errno; 510 511 return test_verify_socket_key(sk, &tmp); 512 } 513 514 static void verify_current_rnext(const char *tst, int sk, 515 int current_keyid, int rnext_keyid) 516 { 517 struct tcp_ao_info_opt ao_info = {}; 518 519 if (test_get_ao_info(sk, &ao_info)) 520 test_error("getsockopt(TCP_AO_INFO) failed"); 521 522 errno = 0; 523 if (current_keyid >= 0) { 524 if (!ao_info.set_current) 525 test_fail("%s: the socket doesn't have current key", tst); 526 else if (ao_info.current_key != current_keyid) 527 test_fail("%s: current key is not the expected one %d != %u", 528 tst, current_keyid, ao_info.current_key); 529 else 530 test_ok("%s: current key %u as expected", 531 tst, ao_info.current_key); 532 } 533 if (rnext_keyid >= 0) { 534 if (!ao_info.set_rnext) 535 test_fail("%s: the socket doesn't have rnext key", tst); 536 else if (ao_info.rnext != rnext_keyid) 537 test_fail("%s: rnext key is not the expected one %d != %u", 538 tst, rnext_keyid, ao_info.rnext); 539 else 540 test_ok("%s: rnext key %u as expected", tst, ao_info.rnext); 541 } 542 } 543 544 545 static int key_collection_socket(bool server, unsigned int port) 546 { 547 unsigned int i; 548 int sk; 549 550 if (server) 551 sk = test_listen_socket(this_ip_addr, port, 1); 552 else 553 sk = socket(test_family, SOCK_STREAM, IPPROTO_TCP); 554 if (sk < 0) 555 test_error("socket()"); 556 557 for (i = 0; i < collection.nr_keys; i++) { 558 struct test_key *key = &collection.keys[i]; 559 union tcp_addr *addr = &wrong_addr; 560 uint8_t sndid, rcvid, vrf; 561 bool set_current = false, set_rnext = false; 562 563 if (key->matches_vrf) 564 vrf = 0; 565 else 566 vrf = test_vrf_ifindex; 567 if (server) { 568 if (key->matches_client) 569 addr = &this_ip_dest; 570 sndid = key->server_keyid; 571 rcvid = key->client_keyid; 572 } else { 573 if (key->matches_server) 574 addr = &this_ip_dest; 575 sndid = key->client_keyid; 576 rcvid = key->server_keyid; 577 key->used_on_client_tx = set_current = key->is_current; 578 key->used_on_server_tx = set_rnext = key->is_rnext; 579 } 580 581 if (test_add_key_cr(sk, key->password, key->len, 582 *addr, vrf, sndid, rcvid, key->maclen, 583 key->alg, set_current, set_rnext)) 584 test_key_error("setsockopt(TCP_AO_ADD_KEY)", key); 585 #ifdef DEBUG 586 test_print("%s [%u/%u] key: { %s, %u:%u, %u, %u:%u:%u:%u (%u)}", 587 server ? "server" : "client", i, collection.nr_keys, 588 key->alg, rcvid, sndid, key->maclen, 589 key->matches_client, key->matches_server, 590 key->is_current, key->is_rnext, key->len); 591 #endif 592 } 593 return sk; 594 } 595 596 static void verify_counters(const char *tst_name, bool is_listen_sk, bool server, 597 struct tcp_counters *a, struct tcp_counters *b) 598 { 599 unsigned int i; 600 601 test_assert_counters_sk(tst_name, a, b, TEST_CNT_GOOD); 602 603 for (i = 0; i < collection.nr_keys; i++) { 604 struct test_key *key = &collection.keys[i]; 605 uint8_t sndid, rcvid; 606 bool rx_cnt_expected; 607 608 if (key->skip_counters_checks) 609 continue; 610 if (server) { 611 sndid = key->server_keyid; 612 rcvid = key->client_keyid; 613 rx_cnt_expected = key->used_on_client_tx; 614 } else { 615 sndid = key->client_keyid; 616 rcvid = key->server_keyid; 617 rx_cnt_expected = key->used_on_server_tx; 618 } 619 620 test_assert_counters_key(tst_name, &a->ao, &b->ao, 621 rx_cnt_expected ? TEST_CNT_KEY_GOOD : 0, 622 sndid, rcvid); 623 } 624 test_tcp_counters_free(a); 625 test_tcp_counters_free(b); 626 test_ok("%s: passed counters checks", tst_name); 627 } 628 629 static struct tcp_ao_getsockopt *lookup_key(struct tcp_ao_getsockopt *buf, 630 size_t len, int sndid, int rcvid) 631 { 632 size_t i; 633 634 for (i = 0; i < len; i++) { 635 if (sndid >= 0 && buf[i].sndid != sndid) 636 continue; 637 if (rcvid >= 0 && buf[i].rcvid != rcvid) 638 continue; 639 return &buf[i]; 640 } 641 return NULL; 642 } 643 644 static void verify_keys(const char *tst_name, int sk, 645 bool is_listen_sk, bool server) 646 { 647 socklen_t len = sizeof(struct tcp_ao_getsockopt); 648 struct tcp_ao_getsockopt *keys; 649 bool passed_test = true; 650 unsigned int i; 651 652 keys = calloc(collection.nr_keys, len); 653 if (!keys) 654 test_error("calloc()"); 655 656 keys->nkeys = collection.nr_keys; 657 keys->get_all = 1; 658 659 if (getsockopt(sk, IPPROTO_TCP, TCP_AO_GET_KEYS, keys, &len)) { 660 free(keys); 661 test_error("getsockopt(TCP_AO_GET_KEYS)"); 662 } 663 664 for (i = 0; i < collection.nr_keys; i++) { 665 struct test_key *key = &collection.keys[i]; 666 struct tcp_ao_getsockopt *dump_key; 667 bool is_kdf_aes_128_cmac = false; 668 bool is_cmac_aes = false; 669 uint8_t sndid, rcvid; 670 bool matches = false; 671 672 if (server) { 673 if (key->matches_client) 674 matches = true; 675 sndid = key->server_keyid; 676 rcvid = key->client_keyid; 677 } else { 678 if (key->matches_server) 679 matches = true; 680 sndid = key->client_keyid; 681 rcvid = key->server_keyid; 682 } 683 if (!key->matches_vrf) 684 matches = false; 685 /* no keys get removed on the original listener socket */ 686 if (is_listen_sk) 687 matches = true; 688 689 dump_key = lookup_key(keys, keys->nkeys, sndid, rcvid); 690 if (matches != !!dump_key) { 691 test_fail("%s: key %u:%u %s%s on the socket", 692 tst_name, sndid, rcvid, 693 key->matches_vrf ? "" : "[vrf] ", 694 matches ? "disappeared" : "yet present"); 695 passed_test = false; 696 goto out; 697 } 698 if (!dump_key) 699 continue; 700 701 if (!strcmp("cmac(aes128)", key->alg)) { 702 is_kdf_aes_128_cmac = (key->len != 16); 703 is_cmac_aes = true; 704 } 705 706 if (is_cmac_aes) { 707 if (strcmp(dump_key->alg_name, "cmac(aes)")) { 708 test_fail("%s: key %u:%u cmac(aes) has unexpected alg %s", 709 tst_name, sndid, rcvid, 710 dump_key->alg_name); 711 passed_test = false; 712 continue; 713 } 714 } else if (strcmp(dump_key->alg_name, key->alg)) { 715 test_fail("%s: key %u:%u has unexpected alg %s != %s", 716 tst_name, sndid, rcvid, 717 dump_key->alg_name, key->alg); 718 passed_test = false; 719 continue; 720 } 721 if (is_kdf_aes_128_cmac) { 722 if (dump_key->keylen != 16) { 723 test_fail("%s: key %u:%u cmac(aes128) has unexpected len %u", 724 tst_name, sndid, rcvid, 725 dump_key->keylen); 726 continue; 727 } 728 } else if (dump_key->keylen != key->len) { 729 test_fail("%s: key %u:%u changed password len %u != %u", 730 tst_name, sndid, rcvid, 731 dump_key->keylen, key->len); 732 passed_test = false; 733 continue; 734 } 735 if (!is_kdf_aes_128_cmac && 736 memcmp(dump_key->key, key->password, key->len)) { 737 test_fail("%s: key %u:%u has different password", 738 tst_name, sndid, rcvid); 739 passed_test = false; 740 continue; 741 } 742 if (dump_key->maclen != key->maclen) { 743 test_fail("%s: key %u:%u changed maclen %u != %u", 744 tst_name, sndid, rcvid, 745 dump_key->maclen, key->maclen); 746 passed_test = false; 747 continue; 748 } 749 } 750 751 if (passed_test) 752 test_ok("%s: The socket keys are consistent with the expectations", 753 tst_name); 754 out: 755 free(keys); 756 } 757 758 static int start_server(const char *tst_name, unsigned int port, size_t quota, 759 struct tcp_counters *begin, 760 unsigned int current_index, unsigned int rnext_index) 761 { 762 struct tcp_counters lsk_c1, lsk_c2; 763 ssize_t bytes; 764 int sk, lsk; 765 766 synchronize_threads(); /* 1: key collection initialized */ 767 lsk = key_collection_socket(true, port); 768 if (test_get_tcp_counters(lsk, &lsk_c1)) 769 test_error("test_get_tcp_counters()"); 770 synchronize_threads(); /* 2: MKTs added => connect() */ 771 if (test_wait_fd(lsk, TEST_TIMEOUT_SEC, 0)) 772 test_error("test_wait_fd()"); 773 774 sk = accept(lsk, NULL, NULL); 775 if (sk < 0) 776 test_error("accept()"); 777 if (test_get_tcp_counters(sk, begin)) 778 test_error("test_get_tcp_counters()"); 779 780 synchronize_threads(); /* 3: accepted => send data */ 781 if (test_get_tcp_counters(lsk, &lsk_c2)) 782 test_error("test_get_tcp_counters()"); 783 verify_keys(tst_name, lsk, true, true); 784 close(lsk); 785 786 bytes = test_server_run(sk, quota, TEST_TIMEOUT_SEC); 787 if (bytes != quota) 788 test_fail("%s: server served: %zd", tst_name, bytes); 789 else 790 test_ok("%s: server alive", tst_name); 791 792 verify_counters(tst_name, true, true, &lsk_c1, &lsk_c2); 793 794 return sk; 795 } 796 797 static void end_server(const char *tst_name, int sk, 798 struct tcp_counters *begin) 799 { 800 struct tcp_counters end; 801 802 if (test_get_tcp_counters(sk, &end)) 803 test_error("test_get_tcp_counters()"); 804 verify_keys(tst_name, sk, false, true); 805 806 synchronize_threads(); /* 4: verified => closed */ 807 close(sk); 808 809 verify_counters(tst_name, false, true, begin, &end); 810 synchronize_threads(); /* 5: counters */ 811 } 812 813 static void try_server_run(const char *tst_name, unsigned int port, size_t quota, 814 unsigned int current_index, unsigned int rnext_index) 815 { 816 struct tcp_counters tmp; 817 int sk; 818 819 sk = start_server(tst_name, port, quota, &tmp, 820 current_index, rnext_index); 821 end_server(tst_name, sk, &tmp); 822 } 823 824 static void server_rotations(const char *tst_name, unsigned int port, 825 size_t quota, unsigned int rotations, 826 unsigned int current_index, unsigned int rnext_index) 827 { 828 struct tcp_counters tmp; 829 unsigned int i; 830 int sk; 831 832 sk = start_server(tst_name, port, quota, &tmp, 833 current_index, rnext_index); 834 835 for (i = current_index + 1; rotations > 0; i++, rotations--) { 836 ssize_t bytes; 837 838 if (i >= collection.nr_keys) 839 i = 0; 840 bytes = test_server_run(sk, quota, TEST_TIMEOUT_SEC); 841 if (bytes != quota) { 842 test_fail("%s: server served: %zd", tst_name, bytes); 843 return; 844 } 845 verify_current_rnext(tst_name, sk, 846 collection.keys[i].server_keyid, -1); 847 synchronize_threads(); /* verify current/rnext */ 848 } 849 end_server(tst_name, sk, &tmp); 850 } 851 852 static int run_client(const char *tst_name, unsigned int port, 853 unsigned int nr_keys, int current_index, int rnext_index, 854 struct tcp_counters *before, 855 const size_t msg_sz, const size_t msg_nr) 856 { 857 int sk; 858 859 synchronize_threads(); /* 1: key collection initialized */ 860 sk = key_collection_socket(false, port); 861 862 if (current_index >= 0 || rnext_index >= 0) { 863 int sndid = -1, rcvid = -1; 864 865 if (current_index >= 0) 866 sndid = collection.keys[current_index].client_keyid; 867 if (rnext_index >= 0) 868 rcvid = collection.keys[rnext_index].server_keyid; 869 if (test_set_key(sk, sndid, rcvid)) 870 test_error("failed to set current/rnext keys"); 871 } 872 if (before && test_get_tcp_counters(sk, before)) 873 test_error("test_get_tcp_counters()"); 874 875 synchronize_threads(); /* 2: MKTs added => connect() */ 876 if (test_connect_socket(sk, this_ip_dest, port++) <= 0) 877 test_error("failed to connect()"); 878 if (current_index < 0) 879 current_index = nr_keys - 1; 880 if (rnext_index < 0) 881 rnext_index = nr_keys - 1; 882 collection.keys[current_index].used_on_client_tx = 1; 883 collection.keys[rnext_index].used_on_server_tx = 1; 884 885 synchronize_threads(); /* 3: accepted => send data */ 886 if (test_client_verify(sk, msg_sz, msg_nr)) { 887 test_fail("verify failed"); 888 close(sk); 889 if (before) 890 test_tcp_counters_free(before); 891 return -1; 892 } 893 894 return sk; 895 } 896 897 static int start_client(const char *tst_name, unsigned int port, 898 unsigned int nr_keys, int current_index, int rnext_index, 899 struct tcp_counters *before, 900 const size_t msg_sz, const size_t msg_nr) 901 { 902 if (init_default_key_collection(nr_keys, true)) 903 test_error("Failed to init the key collection"); 904 905 return run_client(tst_name, port, nr_keys, current_index, 906 rnext_index, before, msg_sz, msg_nr); 907 } 908 909 static void end_client(const char *tst_name, int sk, unsigned int nr_keys, 910 int current_index, int rnext_index, 911 struct tcp_counters *start) 912 { 913 struct tcp_counters end; 914 915 /* Some application may become dependent on this kernel choice */ 916 if (current_index < 0) 917 current_index = nr_keys - 1; 918 if (rnext_index < 0) 919 rnext_index = nr_keys - 1; 920 verify_current_rnext(tst_name, sk, 921 collection.keys[current_index].client_keyid, 922 collection.keys[rnext_index].server_keyid); 923 if (start && test_get_tcp_counters(sk, &end)) 924 test_error("test_get_tcp_counters()"); 925 verify_keys(tst_name, sk, false, false); 926 synchronize_threads(); /* 4: verify => closed */ 927 close(sk); 928 if (start) 929 verify_counters(tst_name, false, false, start, &end); 930 synchronize_threads(); /* 5: counters */ 931 } 932 933 static void try_unmatched_keys(int sk, int *rnext_index, unsigned int port) 934 { 935 struct test_key *key; 936 unsigned int i = 0; 937 int err; 938 939 do { 940 key = &collection.keys[i]; 941 if (!key->matches_server) 942 break; 943 } while (++i < collection.nr_keys); 944 if (key->matches_server) 945 test_error("all keys on client match the server"); 946 947 err = test_add_key_cr(sk, key->password, key->len, wrong_addr, 948 0, key->client_keyid, key->server_keyid, 949 key->maclen, key->alg, 0, 0); 950 if (!err) { 951 test_fail("Added a key with non-matching ip-address for established sk"); 952 return; 953 } 954 if (err == -EINVAL) 955 test_ok("Can't add a key with non-matching ip-address for established sk"); 956 else 957 test_error("Failed to add a key"); 958 959 err = test_add_key_cr(sk, key->password, key->len, this_ip_dest, 960 test_vrf_ifindex, 961 key->client_keyid, key->server_keyid, 962 key->maclen, key->alg, 0, 0); 963 if (!err) { 964 test_fail("Added a key with non-matching VRF for established sk"); 965 return; 966 } 967 if (err == -EINVAL) 968 test_ok("Can't add a key with non-matching VRF for established sk"); 969 else 970 test_error("Failed to add a key"); 971 972 for (i = 0; i < collection.nr_keys; i++) { 973 key = &collection.keys[i]; 974 if (!key->matches_client) 975 break; 976 } 977 if (key->matches_client) 978 test_error("all keys on server match the client"); 979 if (test_set_key(sk, -1, key->server_keyid)) 980 test_error("Can't change the current key"); 981 trace_ao_event_expect(TCP_AO_RNEXT_REQUEST, this_ip_addr, this_ip_dest, 982 -1, port, 0, -1, -1, -1, -1, -1, 983 -1, key->server_keyid, -1); 984 if (test_client_verify(sk, msg_len, nr_packets)) 985 test_fail("verify failed"); 986 *rnext_index = i; 987 } 988 989 static int client_non_matching(const char *tst_name, unsigned int port, 990 unsigned int nr_keys, 991 int current_index, int rnext_index, 992 const size_t msg_sz, const size_t msg_nr) 993 { 994 unsigned int i; 995 996 if (init_default_key_collection(nr_keys, true)) 997 test_error("Failed to init the key collection"); 998 999 for (i = 0; i < nr_keys; i++) { 1000 /* key (0, 0) matches */ 1001 collection.keys[i].matches_client = !!((i + 3) % 4); 1002 collection.keys[i].matches_server = !!((i + 2) % 4); 1003 if (kernel_config_has(KCONFIG_NET_VRF)) 1004 collection.keys[i].matches_vrf = !!((i + 1) % 4); 1005 } 1006 1007 return run_client(tst_name, port, nr_keys, current_index, 1008 rnext_index, NULL, msg_sz, msg_nr); 1009 } 1010 1011 static void check_current_back(const char *tst_name, unsigned int port, 1012 unsigned int nr_keys, 1013 unsigned int current_index, unsigned int rnext_index, 1014 unsigned int rotate_to_index) 1015 { 1016 struct tcp_counters tmp; 1017 int sk; 1018 1019 sk = start_client(tst_name, port, nr_keys, current_index, rnext_index, 1020 &tmp, msg_len, nr_packets); 1021 if (sk < 0) 1022 return; 1023 if (test_set_key(sk, collection.keys[rotate_to_index].client_keyid, -1)) 1024 test_error("Can't change the current key"); 1025 trace_ao_event_expect(TCP_AO_RNEXT_REQUEST, this_ip_dest, this_ip_addr, 1026 port, -1, 0, -1, -1, -1, -1, -1, 1027 collection.keys[rotate_to_index].client_keyid, 1028 collection.keys[current_index].client_keyid, -1); 1029 if (test_client_verify(sk, msg_len, nr_packets)) 1030 test_fail("verify failed"); 1031 /* There is a race here: between setting the current_key with 1032 * setsockopt(TCP_AO_INFO) and starting to send some data - there 1033 * might have been a segment received with the desired 1034 * RNext_key set. In turn that would mean that the first outgoing 1035 * segment will have the desired current_key (flipped back). 1036 * Which is what the user/test wants. As it's racy, skip checking 1037 * the counters, yet check what are the resulting current/rnext 1038 * keys on both sides. 1039 */ 1040 collection.keys[rotate_to_index].skip_counters_checks = 1; 1041 1042 end_client(tst_name, sk, nr_keys, current_index, rnext_index, &tmp); 1043 } 1044 1045 static void roll_over_keys(const char *tst_name, unsigned int port, 1046 unsigned int nr_keys, unsigned int rotations, 1047 unsigned int current_index, unsigned int rnext_index) 1048 { 1049 struct tcp_counters tmp; 1050 unsigned int i; 1051 int sk; 1052 1053 sk = start_client(tst_name, port, nr_keys, current_index, rnext_index, 1054 &tmp, msg_len, nr_packets); 1055 if (sk < 0) 1056 return; 1057 for (i = rnext_index + 1; rotations > 0; i++, rotations--) { 1058 if (i >= collection.nr_keys) 1059 i = 0; 1060 trace_ao_event_expect(TCP_AO_RNEXT_REQUEST, 1061 this_ip_addr, this_ip_dest, 1062 -1, port, 0, -1, -1, -1, -1, -1, 1063 i == 0 ? -1 : collection.keys[i - 1].server_keyid, 1064 collection.keys[i].server_keyid, -1); 1065 if (test_set_key(sk, -1, collection.keys[i].server_keyid)) 1066 test_error("Can't change the Rnext key"); 1067 if (test_client_verify(sk, msg_len, nr_packets)) { 1068 test_fail("verify failed"); 1069 close(sk); 1070 test_tcp_counters_free(&tmp); 1071 return; 1072 } 1073 verify_current_rnext(tst_name, sk, -1, 1074 collection.keys[i].server_keyid); 1075 collection.keys[i].used_on_server_tx = 1; 1076 synchronize_threads(); /* verify current/rnext */ 1077 } 1078 end_client(tst_name, sk, nr_keys, current_index, rnext_index, &tmp); 1079 } 1080 1081 static void try_client_run(const char *tst_name, unsigned int port, 1082 unsigned int nr_keys, int current_index, int rnext_index) 1083 { 1084 struct tcp_counters tmp; 1085 int sk; 1086 1087 sk = start_client(tst_name, port, nr_keys, current_index, rnext_index, 1088 &tmp, msg_len, nr_packets); 1089 if (sk < 0) 1090 return; 1091 end_client(tst_name, sk, nr_keys, current_index, rnext_index, &tmp); 1092 } 1093 1094 static void try_client_match(const char *tst_name, unsigned int port, 1095 unsigned int nr_keys, 1096 int current_index, int rnext_index) 1097 { 1098 int sk; 1099 1100 sk = client_non_matching(tst_name, port, nr_keys, current_index, 1101 rnext_index, msg_len, nr_packets); 1102 if (sk < 0) 1103 return; 1104 try_unmatched_keys(sk, &rnext_index, port); 1105 end_client(tst_name, sk, nr_keys, current_index, rnext_index, NULL); 1106 } 1107 1108 static void *server_fn(void *arg) 1109 { 1110 unsigned int port = test_server_port; 1111 1112 setup_vrfs(); 1113 try_server_run("server: Check current/rnext keys unset before connect()", 1114 port++, quota, 19, 19); 1115 try_server_run("server: Check current/rnext keys set before connect()", 1116 port++, quota, 10, 10); 1117 try_server_run("server: Check current != rnext keys set before connect()", 1118 port++, quota, 5, 10); 1119 try_server_run("server: Check current flapping back on peer's RnextKey request", 1120 port++, quota * 2, 5, 10); 1121 server_rotations("server: Rotate over all different keys", port++, 1122 quota, 20, 0, 0); 1123 try_server_run("server: Check accept() => established key matching", 1124 port++, quota * 2, 0, 0); 1125 1126 synchronize_threads(); /* don't race to exit: client exits */ 1127 return NULL; 1128 } 1129 1130 static void check_established_socket(void) 1131 { 1132 unsigned int port = test_server_port; 1133 1134 setup_vrfs(); 1135 try_client_run("client: Check current/rnext keys unset before connect()", 1136 port++, 20, -1, -1); 1137 try_client_run("client: Check current/rnext keys set before connect()", 1138 port++, 20, 10, 10); 1139 try_client_run("client: Check current != rnext keys set before connect()", 1140 port++, 20, 10, 5); 1141 check_current_back("client: Check current flapping back on peer's RnextKey request", 1142 port++, 20, 10, 5, 2); 1143 roll_over_keys("client: Rotate over all different keys", port++, 1144 20, 20, 0, 0); 1145 try_client_match("client: Check connect() => established key matching", 1146 port++, 20, 0, 0); 1147 } 1148 1149 static void *client_fn(void *arg) 1150 { 1151 if (inet_pton(TEST_FAMILY, TEST_WRONG_IP, &wrong_addr) != 1) 1152 test_error("Can't convert ip address %s", TEST_WRONG_IP); 1153 check_closed_socket(); 1154 check_listen_socket(); 1155 check_established_socket(); 1156 return NULL; 1157 } 1158 1159 int main(int argc, char *argv[]) 1160 { 1161 test_init(121, server_fn, client_fn); 1162 return 0; 1163 } 1164