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ec0994e4 SW |
1 | |
2 | #include "ceph_debug.h" | |
3 | ||
4 | #include <linux/err.h> | |
5 | #include <linux/module.h> | |
6 | #include <linux/random.h> | |
7 | ||
8 | #include "auth_x.h" | |
9 | #include "auth_x_protocol.h" | |
10 | #include "crypto.h" | |
11 | #include "auth.h" | |
12 | #include "decode.h" | |
13 | ||
14 | struct kmem_cache *ceph_x_ticketbuf_cachep; | |
15 | ||
16 | #define TEMP_TICKET_BUF_LEN 256 | |
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_encrypt(struct ceph_crypto_key *secret, | |
32 | void *ibuf, int ilen, void *obuf, size_t olen) | |
33 | { | |
34 | struct ceph_x_encrypt_header head = { | |
35 | .struct_v = 1, | |
36 | .magic = cpu_to_le64(CEPHX_ENC_MAGIC) | |
37 | }; | |
38 | size_t len = olen - sizeof(u32); | |
39 | int ret; | |
40 | ||
41 | ret = ceph_encrypt2(secret, obuf + sizeof(u32), &len, | |
42 | &head, sizeof(head), ibuf, ilen); | |
43 | if (ret) | |
44 | return ret; | |
45 | ceph_encode_32(&obuf, len); | |
46 | return len + sizeof(u32); | |
47 | } | |
48 | ||
49 | static int ceph_x_decrypt(struct ceph_crypto_key *secret, | |
50 | void **p, void *end, void *obuf, size_t olen) | |
51 | { | |
52 | struct ceph_x_encrypt_header head; | |
53 | size_t head_len = sizeof(head); | |
54 | int len, ret; | |
55 | ||
56 | len = ceph_decode_32(p); | |
57 | if (*p + len > end) | |
58 | return -EINVAL; | |
59 | ||
60 | dout("ceph_x_decrypt len %d\n", len); | |
61 | ret = ceph_decrypt2(secret, &head, &head_len, obuf, &olen, | |
62 | *p, len); | |
63 | if (ret) | |
64 | return ret; | |
65 | if (head.struct_v != 1 || le64_to_cpu(head.magic) != CEPHX_ENC_MAGIC) | |
66 | return -EPERM; | |
67 | *p += len; | |
68 | return olen; | |
69 | } | |
70 | ||
71 | /* | |
72 | * get existing (or insert new) ticket handler | |
73 | */ | |
74 | struct ceph_x_ticket_handler *get_ticket_handler(struct ceph_auth_client *ac, | |
75 | int service) | |
76 | { | |
77 | struct ceph_x_ticket_handler *th; | |
78 | struct ceph_x_info *xi = ac->private; | |
79 | struct rb_node *parent = NULL, **p = &xi->ticket_handlers.rb_node; | |
80 | ||
81 | while (*p) { | |
82 | parent = *p; | |
83 | th = rb_entry(parent, struct ceph_x_ticket_handler, node); | |
84 | if (service < th->service) | |
85 | p = &(*p)->rb_left; | |
86 | else if (service > th->service) | |
87 | p = &(*p)->rb_right; | |
88 | else | |
89 | return th; | |
90 | } | |
91 | ||
92 | /* add it */ | |
93 | th = kzalloc(sizeof(*th), GFP_NOFS); | |
94 | if (!th) | |
95 | return ERR_PTR(-ENOMEM); | |
96 | th->service = service; | |
97 | rb_link_node(&th->node, parent, p); | |
98 | rb_insert_color(&th->node, &xi->ticket_handlers); | |
99 | return th; | |
100 | } | |
101 | ||
102 | static void remove_ticket_handler(struct ceph_auth_client *ac, | |
103 | struct ceph_x_ticket_handler *th) | |
104 | { | |
105 | struct ceph_x_info *xi = ac->private; | |
106 | ||
107 | dout("remove_ticket_handler %p %d\n", th, th->service); | |
108 | rb_erase(&th->node, &xi->ticket_handlers); | |
109 | ceph_crypto_key_destroy(&th->session_key); | |
110 | if (th->ticket_blob) | |
111 | ceph_buffer_put(th->ticket_blob); | |
112 | kfree(th); | |
113 | } | |
114 | ||
115 | static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac, | |
116 | struct ceph_crypto_key *secret, | |
117 | void *buf, void *end) | |
118 | { | |
119 | struct ceph_x_info *xi = ac->private; | |
120 | int num; | |
121 | void *p = buf; | |
122 | int ret; | |
123 | char *dbuf; | |
124 | char *ticket_buf; | |
125 | u8 struct_v; | |
126 | ||
127 | dbuf = kmem_cache_alloc(ceph_x_ticketbuf_cachep, GFP_NOFS | GFP_ATOMIC); | |
128 | if (!dbuf) | |
129 | return -ENOMEM; | |
130 | ||
131 | ret = -ENOMEM; | |
132 | ticket_buf = kmem_cache_alloc(ceph_x_ticketbuf_cachep, | |
133 | GFP_NOFS | GFP_ATOMIC); | |
134 | if (!ticket_buf) | |
135 | goto out_dbuf; | |
136 | ||
137 | ceph_decode_need(&p, end, 1 + sizeof(u32), bad); | |
138 | struct_v = ceph_decode_8(&p); | |
139 | if (struct_v != 1) | |
140 | goto bad; | |
141 | num = ceph_decode_32(&p); | |
142 | dout("%d tickets\n", num); | |
143 | while (num--) { | |
144 | int type; | |
145 | u8 struct_v; | |
146 | struct ceph_x_ticket_handler *th; | |
147 | void *dp, *dend; | |
148 | int dlen; | |
149 | char is_enc; | |
150 | struct timespec validity; | |
151 | struct ceph_crypto_key old_key; | |
152 | void *tp, *tpend; | |
153 | ||
154 | ceph_decode_need(&p, end, sizeof(u32) + 1, bad); | |
155 | ||
156 | type = ceph_decode_32(&p); | |
157 | dout(" ticket type %d %s\n", type, ceph_entity_type_name(type)); | |
158 | ||
159 | struct_v = ceph_decode_8(&p); | |
160 | if (struct_v != 1) | |
161 | goto bad; | |
162 | ||
163 | th = get_ticket_handler(ac, type); | |
164 | if (IS_ERR(th)) { | |
165 | ret = PTR_ERR(th); | |
166 | goto out; | |
167 | } | |
168 | ||
169 | /* blob for me */ | |
170 | dlen = ceph_x_decrypt(secret, &p, end, dbuf, | |
171 | TEMP_TICKET_BUF_LEN); | |
172 | if (dlen <= 0) { | |
173 | ret = dlen; | |
174 | goto out; | |
175 | } | |
176 | dout(" decrypted %d bytes\n", dlen); | |
177 | dend = dbuf + dlen; | |
178 | dp = dbuf; | |
179 | ||
180 | struct_v = ceph_decode_8(&dp); | |
181 | if (struct_v != 1) | |
182 | goto bad; | |
183 | ||
184 | memcpy(&old_key, &th->session_key, sizeof(old_key)); | |
185 | ret = ceph_crypto_key_decode(&th->session_key, &dp, dend); | |
186 | if (ret) | |
187 | goto out; | |
188 | ||
189 | ceph_decode_copy(&dp, &th->validity, sizeof(th->validity)); | |
190 | ceph_decode_timespec(&validity, &th->validity); | |
191 | th->expires = get_seconds() + validity.tv_sec; | |
192 | th->renew_after = th->expires - (validity.tv_sec / 4); | |
193 | dout(" expires=%lu renew_after=%lu\n", th->expires, | |
194 | th->renew_after); | |
195 | ||
196 | /* ticket blob for service */ | |
197 | ceph_decode_8_safe(&p, end, is_enc, bad); | |
198 | tp = ticket_buf; | |
199 | if (is_enc) { | |
200 | /* encrypted */ | |
201 | dout(" encrypted ticket\n"); | |
202 | dlen = ceph_x_decrypt(&old_key, &p, end, ticket_buf, | |
203 | TEMP_TICKET_BUF_LEN); | |
204 | if (dlen < 0) { | |
205 | ret = dlen; | |
206 | goto out; | |
207 | } | |
208 | dlen = ceph_decode_32(&tp); | |
209 | } else { | |
210 | /* unencrypted */ | |
211 | ceph_decode_32_safe(&p, end, dlen, bad); | |
212 | ceph_decode_need(&p, end, dlen, bad); | |
213 | ceph_decode_copy(&p, ticket_buf, dlen); | |
214 | } | |
215 | tpend = tp + dlen; | |
216 | dout(" ticket blob is %d bytes\n", dlen); | |
217 | ceph_decode_need(&tp, tpend, 1 + sizeof(u64), bad); | |
218 | struct_v = ceph_decode_8(&tp); | |
219 | th->secret_id = ceph_decode_64(&tp); | |
220 | ret = ceph_decode_buffer(&th->ticket_blob, &tp, tpend); | |
221 | if (ret) | |
222 | goto out; | |
223 | dout(" got ticket service %d (%s) secret_id %lld len %d\n", | |
224 | type, ceph_entity_type_name(type), th->secret_id, | |
225 | (int)th->ticket_blob->vec.iov_len); | |
226 | xi->have_keys |= th->service; | |
227 | } | |
228 | ||
229 | ret = 0; | |
230 | out: | |
231 | kmem_cache_free(ceph_x_ticketbuf_cachep, ticket_buf); | |
232 | out_dbuf: | |
233 | kmem_cache_free(ceph_x_ticketbuf_cachep, dbuf); | |
234 | return ret; | |
235 | ||
236 | bad: | |
237 | ret = -EINVAL; | |
238 | goto out; | |
239 | } | |
240 | ||
241 | static int ceph_x_build_authorizer(struct ceph_auth_client *ac, | |
242 | struct ceph_x_ticket_handler *th, | |
243 | struct ceph_x_authorizer *au) | |
244 | { | |
245 | int len; | |
246 | struct ceph_x_authorize_a *msg_a; | |
247 | struct ceph_x_authorize_b msg_b; | |
248 | void *p, *end; | |
249 | int ret; | |
250 | int ticket_blob_len = | |
251 | (th->ticket_blob ? th->ticket_blob->vec.iov_len : 0); | |
252 | ||
253 | dout("build_authorizer for %s %p\n", | |
254 | ceph_entity_type_name(th->service), au); | |
255 | ||
256 | len = sizeof(*msg_a) + sizeof(msg_b) + sizeof(u32) + | |
257 | ticket_blob_len + 16; | |
258 | dout(" need len %d\n", len); | |
259 | if (au->buf && au->buf->alloc_len < len) { | |
260 | ceph_buffer_put(au->buf); | |
261 | au->buf = NULL; | |
262 | } | |
263 | if (!au->buf) { | |
264 | au->buf = ceph_buffer_new(len, GFP_NOFS); | |
265 | if (!au->buf) | |
266 | return -ENOMEM; | |
267 | } | |
268 | au->service = th->service; | |
269 | ||
270 | msg_a = au->buf->vec.iov_base; | |
271 | msg_a->struct_v = 1; | |
272 | msg_a->global_id = cpu_to_le64(ac->global_id); | |
273 | msg_a->service_id = cpu_to_le32(th->service); | |
274 | msg_a->ticket_blob.struct_v = 1; | |
275 | msg_a->ticket_blob.secret_id = cpu_to_le64(th->secret_id); | |
276 | msg_a->ticket_blob.blob_len = cpu_to_le32(ticket_blob_len); | |
277 | if (ticket_blob_len) { | |
278 | memcpy(msg_a->ticket_blob.blob, th->ticket_blob->vec.iov_base, | |
279 | th->ticket_blob->vec.iov_len); | |
280 | } | |
281 | dout(" th %p secret_id %lld %lld\n", th, th->secret_id, | |
282 | le64_to_cpu(msg_a->ticket_blob.secret_id)); | |
283 | ||
284 | p = msg_a + 1; | |
285 | p += ticket_blob_len; | |
286 | end = au->buf->vec.iov_base + au->buf->vec.iov_len; | |
287 | ||
288 | get_random_bytes(&au->nonce, sizeof(au->nonce)); | |
289 | msg_b.struct_v = 1; | |
290 | msg_b.nonce = cpu_to_le64(au->nonce); | |
291 | ret = ceph_x_encrypt(&th->session_key, &msg_b, sizeof(msg_b), | |
292 | p, end - p); | |
293 | if (ret < 0) | |
294 | goto out_buf; | |
295 | p += ret; | |
296 | au->buf->vec.iov_len = p - au->buf->vec.iov_base; | |
297 | dout(" built authorizer nonce %llx len %d\n", au->nonce, | |
298 | (int)au->buf->vec.iov_len); | |
299 | return 0; | |
300 | ||
301 | out_buf: | |
302 | ceph_buffer_put(au->buf); | |
303 | au->buf = NULL; | |
304 | return ret; | |
305 | } | |
306 | ||
307 | static int ceph_x_encode_ticket(struct ceph_x_ticket_handler *th, | |
308 | void **p, void *end) | |
309 | { | |
310 | ceph_decode_need(p, end, 1 + sizeof(u64), bad); | |
311 | ceph_encode_8(p, 1); | |
312 | ceph_encode_64(p, th->secret_id); | |
313 | if (th->ticket_blob) { | |
314 | const char *buf = th->ticket_blob->vec.iov_base; | |
315 | u32 len = th->ticket_blob->vec.iov_len; | |
316 | ||
317 | ceph_encode_32_safe(p, end, len, bad); | |
318 | ceph_encode_copy_safe(p, end, buf, len, bad); | |
319 | } else { | |
320 | ceph_encode_32_safe(p, end, 0, bad); | |
321 | } | |
322 | ||
323 | return 0; | |
324 | bad: | |
325 | return -ERANGE; | |
326 | } | |
327 | ||
328 | static void ceph_x_validate_tickets(struct ceph_auth_client *ac, int *pneed) | |
329 | { | |
330 | int want = ac->want_keys; | |
331 | struct ceph_x_info *xi = ac->private; | |
332 | int service; | |
333 | ||
334 | *pneed = ac->want_keys & ~(xi->have_keys); | |
335 | ||
336 | for (service = 1; service <= want; service <<= 1) { | |
337 | struct ceph_x_ticket_handler *th; | |
338 | ||
339 | if (!(ac->want_keys & service)) | |
340 | continue; | |
341 | ||
342 | if (*pneed & service) | |
343 | continue; | |
344 | ||
345 | th = get_ticket_handler(ac, service); | |
346 | ||
347 | if (!th) { | |
348 | *pneed |= service; | |
349 | continue; | |
350 | } | |
351 | ||
352 | if (get_seconds() >= th->renew_after) | |
353 | *pneed |= service; | |
354 | if (get_seconds() >= th->expires) | |
355 | xi->have_keys &= ~service; | |
356 | } | |
357 | } | |
358 | ||
359 | ||
360 | static int ceph_x_build_request(struct ceph_auth_client *ac, | |
361 | void *buf, void *end) | |
362 | { | |
363 | struct ceph_x_info *xi = ac->private; | |
364 | int need; | |
365 | struct ceph_x_request_header *head = buf; | |
366 | int ret; | |
367 | struct ceph_x_ticket_handler *th = | |
368 | get_ticket_handler(ac, CEPH_ENTITY_TYPE_AUTH); | |
369 | ||
370 | ceph_x_validate_tickets(ac, &need); | |
371 | ||
372 | dout("build_request want %x have %x need %x\n", | |
373 | ac->want_keys, xi->have_keys, need); | |
374 | ||
375 | if (need & CEPH_ENTITY_TYPE_AUTH) { | |
376 | struct ceph_x_authenticate *auth = (void *)(head + 1); | |
377 | void *p = auth + 1; | |
378 | struct ceph_x_challenge_blob tmp; | |
379 | char tmp_enc[40]; | |
380 | u64 *u; | |
381 | ||
382 | if (p > end) | |
383 | return -ERANGE; | |
384 | ||
385 | dout(" get_auth_session_key\n"); | |
386 | head->op = cpu_to_le16(CEPHX_GET_AUTH_SESSION_KEY); | |
387 | ||
388 | /* encrypt and hash */ | |
389 | get_random_bytes(&auth->client_challenge, sizeof(u64)); | |
390 | tmp.client_challenge = auth->client_challenge; | |
391 | tmp.server_challenge = cpu_to_le64(xi->server_challenge); | |
392 | ret = ceph_x_encrypt(&xi->secret, &tmp, sizeof(tmp), | |
393 | tmp_enc, sizeof(tmp_enc)); | |
394 | if (ret < 0) | |
395 | return ret; | |
396 | ||
397 | auth->struct_v = 1; | |
398 | auth->key = 0; | |
399 | for (u = (u64 *)tmp_enc; u + 1 <= (u64 *)(tmp_enc + ret); u++) | |
400 | auth->key ^= *u; | |
401 | dout(" server_challenge %llx client_challenge %llx key %llx\n", | |
402 | xi->server_challenge, le64_to_cpu(auth->client_challenge), | |
403 | le64_to_cpu(auth->key)); | |
404 | ||
405 | /* now encode the old ticket if exists */ | |
406 | ret = ceph_x_encode_ticket(th, &p, end); | |
407 | if (ret < 0) | |
408 | return ret; | |
409 | ||
410 | return p - buf; | |
411 | } | |
412 | ||
413 | if (need) { | |
414 | void *p = head + 1; | |
415 | struct ceph_x_service_ticket_request *req; | |
416 | ||
417 | if (p > end) | |
418 | return -ERANGE; | |
419 | head->op = cpu_to_le16(CEPHX_GET_PRINCIPAL_SESSION_KEY); | |
420 | ||
421 | BUG_ON(!th); | |
422 | ret = ceph_x_build_authorizer(ac, th, &xi->auth_authorizer); | |
423 | if (ret) | |
424 | return ret; | |
425 | ceph_encode_copy(&p, xi->auth_authorizer.buf->vec.iov_base, | |
426 | xi->auth_authorizer.buf->vec.iov_len); | |
427 | ||
428 | req = p; | |
429 | req->keys = cpu_to_le32(need); | |
430 | p += sizeof(*req); | |
431 | return p - buf; | |
432 | } | |
433 | ||
434 | return 0; | |
435 | } | |
436 | ||
437 | static int ceph_x_handle_reply(struct ceph_auth_client *ac, int result, | |
438 | void *buf, void *end) | |
439 | { | |
440 | struct ceph_x_info *xi = ac->private; | |
441 | struct ceph_x_reply_header *head = buf; | |
442 | struct ceph_x_ticket_handler *th; | |
443 | int len = end - buf; | |
444 | int op; | |
445 | int ret; | |
446 | ||
447 | if (result) | |
448 | return result; /* XXX hmm? */ | |
449 | ||
450 | if (xi->starting) { | |
451 | /* it's a hello */ | |
452 | struct ceph_x_server_challenge *sc = buf; | |
453 | ||
454 | if (len != sizeof(*sc)) | |
455 | return -EINVAL; | |
456 | xi->server_challenge = le64_to_cpu(sc->server_challenge); | |
457 | dout("handle_reply got server challenge %llx\n", | |
458 | xi->server_challenge); | |
459 | xi->starting = false; | |
460 | xi->have_keys &= ~CEPH_ENTITY_TYPE_AUTH; | |
461 | return -EAGAIN; | |
462 | } | |
463 | ||
464 | op = le32_to_cpu(head->op); | |
465 | result = le32_to_cpu(head->result); | |
466 | dout("handle_reply op %d result %d\n", op, result); | |
467 | switch (op) { | |
468 | case CEPHX_GET_AUTH_SESSION_KEY: | |
469 | /* verify auth key */ | |
470 | ret = ceph_x_proc_ticket_reply(ac, &xi->secret, | |
471 | buf + sizeof(*head), end); | |
472 | break; | |
473 | ||
474 | case CEPHX_GET_PRINCIPAL_SESSION_KEY: | |
475 | th = get_ticket_handler(ac, CEPH_ENTITY_TYPE_AUTH); | |
476 | BUG_ON(!th); | |
477 | ret = ceph_x_proc_ticket_reply(ac, &th->session_key, | |
478 | buf + sizeof(*head), end); | |
479 | break; | |
480 | ||
481 | default: | |
482 | return -EINVAL; | |
483 | } | |
484 | if (ret) | |
485 | return ret; | |
486 | if (ac->want_keys == xi->have_keys) | |
487 | return 0; | |
488 | return -EAGAIN; | |
489 | } | |
490 | ||
491 | static int ceph_x_create_authorizer( | |
492 | struct ceph_auth_client *ac, int peer_type, | |
493 | struct ceph_authorizer **a, | |
494 | void **buf, size_t *len, | |
495 | void **reply_buf, size_t *reply_len) | |
496 | { | |
497 | struct ceph_x_authorizer *au; | |
498 | struct ceph_x_ticket_handler *th; | |
499 | int ret; | |
500 | ||
501 | th = get_ticket_handler(ac, peer_type); | |
502 | if (IS_ERR(th)) | |
503 | return PTR_ERR(th); | |
504 | ||
505 | au = kzalloc(sizeof(*au), GFP_NOFS); | |
506 | if (!au) | |
507 | return -ENOMEM; | |
508 | ||
509 | ret = ceph_x_build_authorizer(ac, th, au); | |
510 | if (ret) { | |
511 | kfree(au); | |
512 | return ret; | |
513 | } | |
514 | ||
515 | *a = (struct ceph_authorizer *)au; | |
516 | *buf = au->buf->vec.iov_base; | |
517 | *len = au->buf->vec.iov_len; | |
518 | *reply_buf = au->reply_buf; | |
519 | *reply_len = sizeof(au->reply_buf); | |
520 | return 0; | |
521 | } | |
522 | ||
523 | static int ceph_x_verify_authorizer_reply(struct ceph_auth_client *ac, | |
524 | struct ceph_authorizer *a, size_t len) | |
525 | { | |
526 | struct ceph_x_authorizer *au = (void *)a; | |
527 | struct ceph_x_ticket_handler *th; | |
528 | int ret = 0; | |
529 | struct ceph_x_authorize_reply reply; | |
530 | void *p = au->reply_buf; | |
531 | void *end = p + sizeof(au->reply_buf); | |
532 | ||
533 | th = get_ticket_handler(ac, au->service); | |
534 | if (!th) | |
535 | return -EIO; /* hrm! */ | |
536 | ret = ceph_x_decrypt(&th->session_key, &p, end, &reply, sizeof(reply)); | |
537 | if (ret < 0) | |
538 | return ret; | |
539 | if (ret != sizeof(reply)) | |
540 | return -EPERM; | |
541 | ||
542 | if (au->nonce + 1 != le64_to_cpu(reply.nonce_plus_one)) | |
543 | ret = -EPERM; | |
544 | else | |
545 | ret = 0; | |
546 | dout("verify_authorizer_reply nonce %llx got %llx ret %d\n", | |
547 | au->nonce, le64_to_cpu(reply.nonce_plus_one), ret); | |
548 | return ret; | |
549 | } | |
550 | ||
551 | static void ceph_x_destroy_authorizer(struct ceph_auth_client *ac, | |
552 | struct ceph_authorizer *a) | |
553 | { | |
554 | struct ceph_x_authorizer *au = (void *)a; | |
555 | ||
556 | ceph_buffer_put(au->buf); | |
557 | kfree(au); | |
558 | } | |
559 | ||
560 | ||
561 | static void ceph_x_reset(struct ceph_auth_client *ac) | |
562 | { | |
563 | struct ceph_x_info *xi = ac->private; | |
564 | ||
565 | dout("reset\n"); | |
566 | xi->starting = true; | |
567 | xi->server_challenge = 0; | |
568 | } | |
569 | ||
570 | static void ceph_x_destroy(struct ceph_auth_client *ac) | |
571 | { | |
572 | struct ceph_x_info *xi = ac->private; | |
573 | struct rb_node *p; | |
574 | ||
575 | dout("ceph_x_destroy %p\n", ac); | |
576 | ceph_crypto_key_destroy(&xi->secret); | |
577 | ||
578 | while ((p = rb_first(&xi->ticket_handlers)) != NULL) { | |
579 | struct ceph_x_ticket_handler *th = | |
580 | rb_entry(p, struct ceph_x_ticket_handler, node); | |
581 | remove_ticket_handler(ac, th); | |
582 | } | |
583 | ||
584 | kmem_cache_destroy(ceph_x_ticketbuf_cachep); | |
585 | ||
586 | kfree(ac->private); | |
587 | ac->private = NULL; | |
588 | } | |
589 | ||
590 | static void ceph_x_invalidate_authorizer(struct ceph_auth_client *ac, | |
591 | int peer_type) | |
592 | { | |
593 | struct ceph_x_ticket_handler *th; | |
594 | ||
595 | th = get_ticket_handler(ac, peer_type); | |
596 | if (th && !IS_ERR(th)) | |
597 | remove_ticket_handler(ac, th); | |
598 | } | |
599 | ||
600 | ||
601 | static const struct ceph_auth_client_ops ceph_x_ops = { | |
602 | .is_authenticated = ceph_x_is_authenticated, | |
603 | .build_request = ceph_x_build_request, | |
604 | .handle_reply = ceph_x_handle_reply, | |
605 | .create_authorizer = ceph_x_create_authorizer, | |
606 | .verify_authorizer_reply = ceph_x_verify_authorizer_reply, | |
607 | .destroy_authorizer = ceph_x_destroy_authorizer, | |
608 | .invalidate_authorizer = ceph_x_invalidate_authorizer, | |
609 | .reset = ceph_x_reset, | |
610 | .destroy = ceph_x_destroy, | |
611 | }; | |
612 | ||
613 | ||
614 | int ceph_x_init(struct ceph_auth_client *ac) | |
615 | { | |
616 | struct ceph_x_info *xi; | |
617 | int ret; | |
618 | ||
619 | dout("ceph_x_init %p\n", ac); | |
620 | xi = kzalloc(sizeof(*xi), GFP_NOFS); | |
621 | if (!xi) | |
622 | return -ENOMEM; | |
623 | ||
624 | ret = -ENOMEM; | |
625 | ceph_x_ticketbuf_cachep = kmem_cache_create("ceph_x_ticketbuf", | |
626 | TEMP_TICKET_BUF_LEN, 8, | |
627 | (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), | |
628 | NULL); | |
629 | if (!ceph_x_ticketbuf_cachep) | |
630 | goto done_nomem; | |
631 | ret = -EINVAL; | |
632 | if (!ac->secret) { | |
633 | pr_err("no secret set (for auth_x protocol)\n"); | |
634 | goto done_nomem; | |
635 | } | |
636 | ||
637 | ret = ceph_crypto_key_unarmor(&xi->secret, ac->secret); | |
638 | if (ret) | |
639 | goto done_nomem; | |
640 | ||
641 | xi->starting = true; | |
642 | xi->ticket_handlers = RB_ROOT; | |
643 | ||
644 | ac->protocol = CEPH_AUTH_CEPHX; | |
645 | ac->private = xi; | |
646 | ac->ops = &ceph_x_ops; | |
647 | return 0; | |
648 | ||
649 | done_nomem: | |
650 | kfree(xi); | |
651 | if (ceph_x_ticketbuf_cachep) | |
652 | kmem_cache_destroy(ceph_x_ticketbuf_cachep); | |
653 | return ret; | |
654 | } | |
655 | ||
656 |