1 2 #include <linux/ceph/ceph_debug.h> 3 4 #include <linux/err.h> 5 #include <linux/module.h> 6 #include <linux/random.h> 7 #include <linux/slab.h> 8 9 #include <linux/ceph/decode.h> 10 #include <linux/ceph/auth.h> 11 #include <linux/ceph/libceph.h> 12 #include <linux/ceph/messenger.h> 13 14 #include "crypto.h" 15 #include "auth_x.h" 16 #include "auth_x_protocol.h" 17 18 static void ceph_x_validate_tickets(struct ceph_auth_client *ac, int *pneed); 19 20 static int ceph_x_is_authenticated(struct ceph_auth_client *ac) 21 { 22 struct ceph_x_info *xi = ac->private; 23 int need; 24 25 ceph_x_validate_tickets(ac, &need); 26 dout("ceph_x_is_authenticated want=%d need=%d have=%d\n", 27 ac->want_keys, need, xi->have_keys); 28 return (ac->want_keys & xi->have_keys) == ac->want_keys; 29 } 30 31 static int ceph_x_should_authenticate(struct ceph_auth_client *ac) 32 { 33 struct ceph_x_info *xi = ac->private; 34 int need; 35 36 ceph_x_validate_tickets(ac, &need); 37 dout("ceph_x_should_authenticate want=%d need=%d have=%d\n", 38 ac->want_keys, need, xi->have_keys); 39 return need != 0; 40 } 41 42 static int ceph_x_encrypt_buflen(int ilen) 43 { 44 return sizeof(struct ceph_x_encrypt_header) + ilen + 16 + 45 sizeof(u32); 46 } 47 48 static int ceph_x_encrypt(struct ceph_crypto_key *secret, 49 void *ibuf, int ilen, void *obuf, size_t olen) 50 { 51 struct ceph_x_encrypt_header head = { 52 .struct_v = 1, 53 .magic = cpu_to_le64(CEPHX_ENC_MAGIC) 54 }; 55 size_t len = olen - sizeof(u32); 56 int ret; 57 58 ret = ceph_encrypt2(secret, obuf + sizeof(u32), &len, 59 &head, sizeof(head), ibuf, ilen); 60 if (ret) 61 return ret; 62 ceph_encode_32(&obuf, len); 63 return len + sizeof(u32); 64 } 65 66 static int ceph_x_decrypt(struct ceph_crypto_key *secret, 67 void **p, void *end, void **obuf, size_t olen) 68 { 69 struct ceph_x_encrypt_header head; 70 size_t head_len = sizeof(head); 71 int len, ret; 72 73 len = ceph_decode_32(p); 74 if (*p + len > end) 75 return -EINVAL; 76 77 dout("ceph_x_decrypt len %d\n", len); 78 if (*obuf == NULL) { 79 *obuf = kmalloc(len, GFP_NOFS); 80 if (!*obuf) 81 return -ENOMEM; 82 olen = len; 83 } 84 85 ret = ceph_decrypt2(secret, &head, &head_len, *obuf, &olen, *p, len); 86 if (ret) 87 return ret; 88 if (head.struct_v != 1 || le64_to_cpu(head.magic) != CEPHX_ENC_MAGIC) 89 return -EPERM; 90 *p += len; 91 return olen; 92 } 93 94 /* 95 * get existing (or insert new) ticket handler 96 */ 97 static struct ceph_x_ticket_handler * 98 get_ticket_handler(struct ceph_auth_client *ac, int service) 99 { 100 struct ceph_x_ticket_handler *th; 101 struct ceph_x_info *xi = ac->private; 102 struct rb_node *parent = NULL, **p = &xi->ticket_handlers.rb_node; 103 104 while (*p) { 105 parent = *p; 106 th = rb_entry(parent, struct ceph_x_ticket_handler, node); 107 if (service < th->service) 108 p = &(*p)->rb_left; 109 else if (service > th->service) 110 p = &(*p)->rb_right; 111 else 112 return th; 113 } 114 115 /* add it */ 116 th = kzalloc(sizeof(*th), GFP_NOFS); 117 if (!th) 118 return ERR_PTR(-ENOMEM); 119 th->service = service; 120 rb_link_node(&th->node, parent, p); 121 rb_insert_color(&th->node, &xi->ticket_handlers); 122 return th; 123 } 124 125 static void remove_ticket_handler(struct ceph_auth_client *ac, 126 struct ceph_x_ticket_handler *th) 127 { 128 struct ceph_x_info *xi = ac->private; 129 130 dout("remove_ticket_handler %p %d\n", th, th->service); 131 rb_erase(&th->node, &xi->ticket_handlers); 132 ceph_crypto_key_destroy(&th->session_key); 133 if (th->ticket_blob) 134 ceph_buffer_put(th->ticket_blob); 135 kfree(th); 136 } 137 138 static int process_one_ticket(struct ceph_auth_client *ac, 139 struct ceph_crypto_key *secret, 140 void **p, void *end) 141 { 142 struct ceph_x_info *xi = ac->private; 143 int type; 144 u8 tkt_struct_v, blob_struct_v; 145 struct ceph_x_ticket_handler *th; 146 void *dbuf = NULL; 147 void *dp, *dend; 148 int dlen; 149 char is_enc; 150 struct timespec validity; 151 struct ceph_crypto_key old_key; 152 void *ticket_buf = NULL; 153 void *tp, *tpend; 154 void **ptp; 155 struct ceph_timespec new_validity; 156 struct ceph_crypto_key new_session_key; 157 struct ceph_buffer *new_ticket_blob; 158 unsigned long new_expires, new_renew_after; 159 u64 new_secret_id; 160 int ret; 161 162 ceph_decode_need(p, end, sizeof(u32) + 1, bad); 163 164 type = ceph_decode_32(p); 165 dout(" ticket type %d %s\n", type, ceph_entity_type_name(type)); 166 167 tkt_struct_v = ceph_decode_8(p); 168 if (tkt_struct_v != 1) 169 goto bad; 170 171 th = get_ticket_handler(ac, type); 172 if (IS_ERR(th)) { 173 ret = PTR_ERR(th); 174 goto out; 175 } 176 177 /* blob for me */ 178 dlen = ceph_x_decrypt(secret, p, end, &dbuf, 0); 179 if (dlen <= 0) { 180 ret = dlen; 181 goto out; 182 } 183 dout(" decrypted %d bytes\n", dlen); 184 dp = dbuf; 185 dend = dp + dlen; 186 187 tkt_struct_v = ceph_decode_8(&dp); 188 if (tkt_struct_v != 1) 189 goto bad; 190 191 memcpy(&old_key, &th->session_key, sizeof(old_key)); 192 ret = ceph_crypto_key_decode(&new_session_key, &dp, dend); 193 if (ret) 194 goto out; 195 196 ceph_decode_copy(&dp, &new_validity, sizeof(new_validity)); 197 ceph_decode_timespec(&validity, &new_validity); 198 new_expires = get_seconds() + validity.tv_sec; 199 new_renew_after = new_expires - (validity.tv_sec / 4); 200 dout(" expires=%lu renew_after=%lu\n", new_expires, 201 new_renew_after); 202 203 /* ticket blob for service */ 204 ceph_decode_8_safe(p, end, is_enc, bad); 205 if (is_enc) { 206 /* encrypted */ 207 dout(" encrypted ticket\n"); 208 dlen = ceph_x_decrypt(&old_key, p, end, &ticket_buf, 0); 209 if (dlen < 0) { 210 ret = dlen; 211 goto out; 212 } 213 tp = ticket_buf; 214 ptp = &tp; 215 tpend = *ptp + dlen; 216 } else { 217 /* unencrypted */ 218 ptp = p; 219 tpend = end; 220 } 221 ceph_decode_32_safe(ptp, tpend, dlen, bad); 222 dout(" ticket blob is %d bytes\n", dlen); 223 ceph_decode_need(ptp, tpend, 1 + sizeof(u64), bad); 224 blob_struct_v = ceph_decode_8(ptp); 225 new_secret_id = ceph_decode_64(ptp); 226 ret = ceph_decode_buffer(&new_ticket_blob, ptp, tpend); 227 if (ret) 228 goto out; 229 230 /* all is well, update our ticket */ 231 ceph_crypto_key_destroy(&th->session_key); 232 if (th->ticket_blob) 233 ceph_buffer_put(th->ticket_blob); 234 th->session_key = new_session_key; 235 th->ticket_blob = new_ticket_blob; 236 th->validity = new_validity; 237 th->secret_id = new_secret_id; 238 th->expires = new_expires; 239 th->renew_after = new_renew_after; 240 dout(" got ticket service %d (%s) secret_id %lld len %d\n", 241 type, ceph_entity_type_name(type), th->secret_id, 242 (int)th->ticket_blob->vec.iov_len); 243 xi->have_keys |= th->service; 244 245 out: 246 kfree(ticket_buf); 247 kfree(dbuf); 248 return ret; 249 250 bad: 251 ret = -EINVAL; 252 goto out; 253 } 254 255 static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac, 256 struct ceph_crypto_key *secret, 257 void *buf, void *end) 258 { 259 void *p = buf; 260 u8 reply_struct_v; 261 u32 num; 262 int ret; 263 264 ceph_decode_8_safe(&p, end, reply_struct_v, bad); 265 if (reply_struct_v != 1) 266 return -EINVAL; 267 268 ceph_decode_32_safe(&p, end, num, bad); 269 dout("%d tickets\n", num); 270 271 while (num--) { 272 ret = process_one_ticket(ac, secret, &p, end); 273 if (ret) 274 return ret; 275 } 276 277 return 0; 278 279 bad: 280 return -EINVAL; 281 } 282 283 static void ceph_x_authorizer_cleanup(struct ceph_x_authorizer *au) 284 { 285 ceph_crypto_key_destroy(&au->session_key); 286 if (au->buf) { 287 ceph_buffer_put(au->buf); 288 au->buf = NULL; 289 } 290 } 291 292 static int ceph_x_build_authorizer(struct ceph_auth_client *ac, 293 struct ceph_x_ticket_handler *th, 294 struct ceph_x_authorizer *au) 295 { 296 int maxlen; 297 struct ceph_x_authorize_a *msg_a; 298 struct ceph_x_authorize_b msg_b; 299 void *p, *end; 300 int ret; 301 int ticket_blob_len = 302 (th->ticket_blob ? th->ticket_blob->vec.iov_len : 0); 303 304 dout("build_authorizer for %s %p\n", 305 ceph_entity_type_name(th->service), au); 306 307 ceph_crypto_key_destroy(&au->session_key); 308 ret = ceph_crypto_key_clone(&au->session_key, &th->session_key); 309 if (ret) 310 goto out_au; 311 312 maxlen = sizeof(*msg_a) + sizeof(msg_b) + 313 ceph_x_encrypt_buflen(ticket_blob_len); 314 dout(" need len %d\n", maxlen); 315 if (au->buf && au->buf->alloc_len < maxlen) { 316 ceph_buffer_put(au->buf); 317 au->buf = NULL; 318 } 319 if (!au->buf) { 320 au->buf = ceph_buffer_new(maxlen, GFP_NOFS); 321 if (!au->buf) { 322 ret = -ENOMEM; 323 goto out_au; 324 } 325 } 326 au->service = th->service; 327 au->secret_id = th->secret_id; 328 329 msg_a = au->buf->vec.iov_base; 330 msg_a->struct_v = 1; 331 msg_a->global_id = cpu_to_le64(ac->global_id); 332 msg_a->service_id = cpu_to_le32(th->service); 333 msg_a->ticket_blob.struct_v = 1; 334 msg_a->ticket_blob.secret_id = cpu_to_le64(th->secret_id); 335 msg_a->ticket_blob.blob_len = cpu_to_le32(ticket_blob_len); 336 if (ticket_blob_len) { 337 memcpy(msg_a->ticket_blob.blob, th->ticket_blob->vec.iov_base, 338 th->ticket_blob->vec.iov_len); 339 } 340 dout(" th %p secret_id %lld %lld\n", th, th->secret_id, 341 le64_to_cpu(msg_a->ticket_blob.secret_id)); 342 343 p = msg_a + 1; 344 p += ticket_blob_len; 345 end = au->buf->vec.iov_base + au->buf->vec.iov_len; 346 347 get_random_bytes(&au->nonce, sizeof(au->nonce)); 348 msg_b.struct_v = 1; 349 msg_b.nonce = cpu_to_le64(au->nonce); 350 ret = ceph_x_encrypt(&au->session_key, &msg_b, sizeof(msg_b), 351 p, end - p); 352 if (ret < 0) 353 goto out_au; 354 p += ret; 355 au->buf->vec.iov_len = p - au->buf->vec.iov_base; 356 dout(" built authorizer nonce %llx len %d\n", au->nonce, 357 (int)au->buf->vec.iov_len); 358 BUG_ON(au->buf->vec.iov_len > maxlen); 359 return 0; 360 361 out_au: 362 ceph_x_authorizer_cleanup(au); 363 return ret; 364 } 365 366 static int ceph_x_encode_ticket(struct ceph_x_ticket_handler *th, 367 void **p, void *end) 368 { 369 ceph_decode_need(p, end, 1 + sizeof(u64), bad); 370 ceph_encode_8(p, 1); 371 ceph_encode_64(p, th->secret_id); 372 if (th->ticket_blob) { 373 const char *buf = th->ticket_blob->vec.iov_base; 374 u32 len = th->ticket_blob->vec.iov_len; 375 376 ceph_encode_32_safe(p, end, len, bad); 377 ceph_encode_copy_safe(p, end, buf, len, bad); 378 } else { 379 ceph_encode_32_safe(p, end, 0, bad); 380 } 381 382 return 0; 383 bad: 384 return -ERANGE; 385 } 386 387 static void ceph_x_validate_tickets(struct ceph_auth_client *ac, int *pneed) 388 { 389 int want = ac->want_keys; 390 struct ceph_x_info *xi = ac->private; 391 int service; 392 393 *pneed = ac->want_keys & ~(xi->have_keys); 394 395 for (service = 1; service <= want; service <<= 1) { 396 struct ceph_x_ticket_handler *th; 397 398 if (!(ac->want_keys & service)) 399 continue; 400 401 if (*pneed & service) 402 continue; 403 404 th = get_ticket_handler(ac, service); 405 406 if (IS_ERR(th)) { 407 *pneed |= service; 408 continue; 409 } 410 411 if (get_seconds() >= th->renew_after) 412 *pneed |= service; 413 if (get_seconds() >= th->expires) 414 xi->have_keys &= ~service; 415 } 416 } 417 418 419 static int ceph_x_build_request(struct ceph_auth_client *ac, 420 void *buf, void *end) 421 { 422 struct ceph_x_info *xi = ac->private; 423 int need; 424 struct ceph_x_request_header *head = buf; 425 int ret; 426 struct ceph_x_ticket_handler *th = 427 get_ticket_handler(ac, CEPH_ENTITY_TYPE_AUTH); 428 429 if (IS_ERR(th)) 430 return PTR_ERR(th); 431 432 ceph_x_validate_tickets(ac, &need); 433 434 dout("build_request want %x have %x need %x\n", 435 ac->want_keys, xi->have_keys, need); 436 437 if (need & CEPH_ENTITY_TYPE_AUTH) { 438 struct ceph_x_authenticate *auth = (void *)(head + 1); 439 void *p = auth + 1; 440 struct ceph_x_challenge_blob tmp; 441 char tmp_enc[40]; 442 u64 *u; 443 444 if (p > end) 445 return -ERANGE; 446 447 dout(" get_auth_session_key\n"); 448 head->op = cpu_to_le16(CEPHX_GET_AUTH_SESSION_KEY); 449 450 /* encrypt and hash */ 451 get_random_bytes(&auth->client_challenge, sizeof(u64)); 452 tmp.client_challenge = auth->client_challenge; 453 tmp.server_challenge = cpu_to_le64(xi->server_challenge); 454 ret = ceph_x_encrypt(&xi->secret, &tmp, sizeof(tmp), 455 tmp_enc, sizeof(tmp_enc)); 456 if (ret < 0) 457 return ret; 458 459 auth->struct_v = 1; 460 auth->key = 0; 461 for (u = (u64 *)tmp_enc; u + 1 <= (u64 *)(tmp_enc + ret); u++) 462 auth->key ^= *(__le64 *)u; 463 dout(" server_challenge %llx client_challenge %llx key %llx\n", 464 xi->server_challenge, le64_to_cpu(auth->client_challenge), 465 le64_to_cpu(auth->key)); 466 467 /* now encode the old ticket if exists */ 468 ret = ceph_x_encode_ticket(th, &p, end); 469 if (ret < 0) 470 return ret; 471 472 return p - buf; 473 } 474 475 if (need) { 476 void *p = head + 1; 477 struct ceph_x_service_ticket_request *req; 478 479 if (p > end) 480 return -ERANGE; 481 head->op = cpu_to_le16(CEPHX_GET_PRINCIPAL_SESSION_KEY); 482 483 ret = ceph_x_build_authorizer(ac, th, &xi->auth_authorizer); 484 if (ret) 485 return ret; 486 ceph_encode_copy(&p, xi->auth_authorizer.buf->vec.iov_base, 487 xi->auth_authorizer.buf->vec.iov_len); 488 489 req = p; 490 req->keys = cpu_to_le32(need); 491 p += sizeof(*req); 492 return p - buf; 493 } 494 495 return 0; 496 } 497 498 static int ceph_x_handle_reply(struct ceph_auth_client *ac, int result, 499 void *buf, void *end) 500 { 501 struct ceph_x_info *xi = ac->private; 502 struct ceph_x_reply_header *head = buf; 503 struct ceph_x_ticket_handler *th; 504 int len = end - buf; 505 int op; 506 int ret; 507 508 if (result) 509 return result; /* XXX hmm? */ 510 511 if (xi->starting) { 512 /* it's a hello */ 513 struct ceph_x_server_challenge *sc = buf; 514 515 if (len != sizeof(*sc)) 516 return -EINVAL; 517 xi->server_challenge = le64_to_cpu(sc->server_challenge); 518 dout("handle_reply got server challenge %llx\n", 519 xi->server_challenge); 520 xi->starting = false; 521 xi->have_keys &= ~CEPH_ENTITY_TYPE_AUTH; 522 return -EAGAIN; 523 } 524 525 op = le16_to_cpu(head->op); 526 result = le32_to_cpu(head->result); 527 dout("handle_reply op %d result %d\n", op, result); 528 switch (op) { 529 case CEPHX_GET_AUTH_SESSION_KEY: 530 /* verify auth key */ 531 ret = ceph_x_proc_ticket_reply(ac, &xi->secret, 532 buf + sizeof(*head), end); 533 break; 534 535 case CEPHX_GET_PRINCIPAL_SESSION_KEY: 536 th = get_ticket_handler(ac, CEPH_ENTITY_TYPE_AUTH); 537 if (IS_ERR(th)) 538 return PTR_ERR(th); 539 ret = ceph_x_proc_ticket_reply(ac, &th->session_key, 540 buf + sizeof(*head), end); 541 break; 542 543 default: 544 return -EINVAL; 545 } 546 if (ret) 547 return ret; 548 if (ac->want_keys == xi->have_keys) 549 return 0; 550 return -EAGAIN; 551 } 552 553 static int ceph_x_create_authorizer( 554 struct ceph_auth_client *ac, int peer_type, 555 struct ceph_auth_handshake *auth) 556 { 557 struct ceph_x_authorizer *au; 558 struct ceph_x_ticket_handler *th; 559 int ret; 560 561 th = get_ticket_handler(ac, peer_type); 562 if (IS_ERR(th)) 563 return PTR_ERR(th); 564 565 au = kzalloc(sizeof(*au), GFP_NOFS); 566 if (!au) 567 return -ENOMEM; 568 569 ret = ceph_x_build_authorizer(ac, th, au); 570 if (ret) { 571 kfree(au); 572 return ret; 573 } 574 575 auth->authorizer = (struct ceph_authorizer *) au; 576 auth->authorizer_buf = au->buf->vec.iov_base; 577 auth->authorizer_buf_len = au->buf->vec.iov_len; 578 auth->authorizer_reply_buf = au->reply_buf; 579 auth->authorizer_reply_buf_len = sizeof (au->reply_buf); 580 auth->sign_message = ac->ops->sign_message; 581 auth->check_message_signature = ac->ops->check_message_signature; 582 583 return 0; 584 } 585 586 static int ceph_x_update_authorizer( 587 struct ceph_auth_client *ac, int peer_type, 588 struct ceph_auth_handshake *auth) 589 { 590 struct ceph_x_authorizer *au; 591 struct ceph_x_ticket_handler *th; 592 593 th = get_ticket_handler(ac, peer_type); 594 if (IS_ERR(th)) 595 return PTR_ERR(th); 596 597 au = (struct ceph_x_authorizer *)auth->authorizer; 598 if (au->secret_id < th->secret_id) { 599 dout("ceph_x_update_authorizer service %u secret %llu < %llu\n", 600 au->service, au->secret_id, th->secret_id); 601 return ceph_x_build_authorizer(ac, th, au); 602 } 603 return 0; 604 } 605 606 static int ceph_x_verify_authorizer_reply(struct ceph_auth_client *ac, 607 struct ceph_authorizer *a, size_t len) 608 { 609 struct ceph_x_authorizer *au = (void *)a; 610 int ret = 0; 611 struct ceph_x_authorize_reply reply; 612 void *preply = &reply; 613 void *p = au->reply_buf; 614 void *end = p + sizeof(au->reply_buf); 615 616 ret = ceph_x_decrypt(&au->session_key, &p, end, &preply, sizeof(reply)); 617 if (ret < 0) 618 return ret; 619 if (ret != sizeof(reply)) 620 return -EPERM; 621 622 if (au->nonce + 1 != le64_to_cpu(reply.nonce_plus_one)) 623 ret = -EPERM; 624 else 625 ret = 0; 626 dout("verify_authorizer_reply nonce %llx got %llx ret %d\n", 627 au->nonce, le64_to_cpu(reply.nonce_plus_one), ret); 628 return ret; 629 } 630 631 static void ceph_x_destroy_authorizer(struct ceph_auth_client *ac, 632 struct ceph_authorizer *a) 633 { 634 struct ceph_x_authorizer *au = (void *)a; 635 636 ceph_x_authorizer_cleanup(au); 637 kfree(au); 638 } 639 640 641 static void ceph_x_reset(struct ceph_auth_client *ac) 642 { 643 struct ceph_x_info *xi = ac->private; 644 645 dout("reset\n"); 646 xi->starting = true; 647 xi->server_challenge = 0; 648 } 649 650 static void ceph_x_destroy(struct ceph_auth_client *ac) 651 { 652 struct ceph_x_info *xi = ac->private; 653 struct rb_node *p; 654 655 dout("ceph_x_destroy %p\n", ac); 656 ceph_crypto_key_destroy(&xi->secret); 657 658 while ((p = rb_first(&xi->ticket_handlers)) != NULL) { 659 struct ceph_x_ticket_handler *th = 660 rb_entry(p, struct ceph_x_ticket_handler, node); 661 remove_ticket_handler(ac, th); 662 } 663 664 ceph_x_authorizer_cleanup(&xi->auth_authorizer); 665 666 kfree(ac->private); 667 ac->private = NULL; 668 } 669 670 static void ceph_x_invalidate_authorizer(struct ceph_auth_client *ac, 671 int peer_type) 672 { 673 struct ceph_x_ticket_handler *th; 674 675 th = get_ticket_handler(ac, peer_type); 676 if (!IS_ERR(th)) 677 memset(&th->validity, 0, sizeof(th->validity)); 678 } 679 680 static int calcu_signature(struct ceph_x_authorizer *au, 681 struct ceph_msg *msg, __le64 *sig) 682 { 683 int ret; 684 char tmp_enc[40]; 685 __le32 tmp[5] = { 686 cpu_to_le32(16), msg->hdr.crc, msg->footer.front_crc, 687 msg->footer.middle_crc, msg->footer.data_crc, 688 }; 689 ret = ceph_x_encrypt(&au->session_key, &tmp, sizeof(tmp), 690 tmp_enc, sizeof(tmp_enc)); 691 if (ret < 0) 692 return ret; 693 *sig = *(__le64*)(tmp_enc + 4); 694 return 0; 695 } 696 697 static int ceph_x_sign_message(struct ceph_auth_handshake *auth, 698 struct ceph_msg *msg) 699 { 700 int ret; 701 702 if (ceph_test_opt(from_msgr(msg->con->msgr), NOMSGSIGN)) 703 return 0; 704 705 ret = calcu_signature((struct ceph_x_authorizer *)auth->authorizer, 706 msg, &msg->footer.sig); 707 if (ret < 0) 708 return ret; 709 msg->footer.flags |= CEPH_MSG_FOOTER_SIGNED; 710 return 0; 711 } 712 713 static int ceph_x_check_message_signature(struct ceph_auth_handshake *auth, 714 struct ceph_msg *msg) 715 { 716 __le64 sig_check; 717 int ret; 718 719 if (ceph_test_opt(from_msgr(msg->con->msgr), NOMSGSIGN)) 720 return 0; 721 722 ret = calcu_signature((struct ceph_x_authorizer *)auth->authorizer, 723 msg, &sig_check); 724 if (ret < 0) 725 return ret; 726 if (sig_check == msg->footer.sig) 727 return 0; 728 if (msg->footer.flags & CEPH_MSG_FOOTER_SIGNED) 729 dout("ceph_x_check_message_signature %p has signature %llx " 730 "expect %llx\n", msg, msg->footer.sig, sig_check); 731 else 732 dout("ceph_x_check_message_signature %p sender did not set " 733 "CEPH_MSG_FOOTER_SIGNED\n", msg); 734 return -EBADMSG; 735 } 736 737 static const struct ceph_auth_client_ops ceph_x_ops = { 738 .name = "x", 739 .is_authenticated = ceph_x_is_authenticated, 740 .should_authenticate = ceph_x_should_authenticate, 741 .build_request = ceph_x_build_request, 742 .handle_reply = ceph_x_handle_reply, 743 .create_authorizer = ceph_x_create_authorizer, 744 .update_authorizer = ceph_x_update_authorizer, 745 .verify_authorizer_reply = ceph_x_verify_authorizer_reply, 746 .destroy_authorizer = ceph_x_destroy_authorizer, 747 .invalidate_authorizer = ceph_x_invalidate_authorizer, 748 .reset = ceph_x_reset, 749 .destroy = ceph_x_destroy, 750 .sign_message = ceph_x_sign_message, 751 .check_message_signature = ceph_x_check_message_signature, 752 }; 753 754 755 int ceph_x_init(struct ceph_auth_client *ac) 756 { 757 struct ceph_x_info *xi; 758 int ret; 759 760 dout("ceph_x_init %p\n", ac); 761 ret = -ENOMEM; 762 xi = kzalloc(sizeof(*xi), GFP_NOFS); 763 if (!xi) 764 goto out; 765 766 ret = -EINVAL; 767 if (!ac->key) { 768 pr_err("no secret set (for auth_x protocol)\n"); 769 goto out_nomem; 770 } 771 772 ret = ceph_crypto_key_clone(&xi->secret, ac->key); 773 if (ret < 0) { 774 pr_err("cannot clone key: %d\n", ret); 775 goto out_nomem; 776 } 777 778 xi->starting = true; 779 xi->ticket_handlers = RB_ROOT; 780 781 ac->protocol = CEPH_AUTH_CEPHX; 782 ac->private = xi; 783 ac->ops = &ceph_x_ops; 784 return 0; 785 786 out_nomem: 787 kfree(xi); 788 out: 789 return ret; 790 } 791 792 793