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