net/ceph/auth_x.c

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