Commit | Line | Data |
---|---|---|
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 | ||
807c86e2 SW |
31 | static int ceph_x_encrypt_buflen(int ilen) |
32 | { | |
33 | return sizeof(struct ceph_x_encrypt_header) + ilen + 16 + | |
34 | sizeof(u32); | |
35 | } | |
36 | ||
ec0994e4 SW |
37 | static int ceph_x_encrypt(struct ceph_crypto_key *secret, |
38 | void *ibuf, int ilen, void *obuf, size_t olen) | |
39 | { | |
40 | struct ceph_x_encrypt_header head = { | |
41 | .struct_v = 1, | |
42 | .magic = cpu_to_le64(CEPHX_ENC_MAGIC) | |
43 | }; | |
44 | size_t len = olen - sizeof(u32); | |
45 | int ret; | |
46 | ||
47 | ret = ceph_encrypt2(secret, obuf + sizeof(u32), &len, | |
48 | &head, sizeof(head), ibuf, ilen); | |
49 | if (ret) | |
50 | return ret; | |
51 | ceph_encode_32(&obuf, len); | |
52 | return len + sizeof(u32); | |
53 | } | |
54 | ||
55 | static int ceph_x_decrypt(struct ceph_crypto_key *secret, | |
56 | void **p, void *end, void *obuf, size_t olen) | |
57 | { | |
58 | struct ceph_x_encrypt_header head; | |
59 | size_t head_len = sizeof(head); | |
60 | int len, ret; | |
61 | ||
62 | len = ceph_decode_32(p); | |
63 | if (*p + len > end) | |
64 | return -EINVAL; | |
65 | ||
66 | dout("ceph_x_decrypt len %d\n", len); | |
67 | ret = ceph_decrypt2(secret, &head, &head_len, obuf, &olen, | |
68 | *p, len); | |
69 | if (ret) | |
70 | return ret; | |
71 | if (head.struct_v != 1 || le64_to_cpu(head.magic) != CEPHX_ENC_MAGIC) | |
72 | return -EPERM; | |
73 | *p += len; | |
74 | return olen; | |
75 | } | |
76 | ||
77 | /* | |
78 | * get existing (or insert new) ticket handler | |
79 | */ | |
80 | struct ceph_x_ticket_handler *get_ticket_handler(struct ceph_auth_client *ac, | |
81 | int service) | |
82 | { | |
83 | struct ceph_x_ticket_handler *th; | |
84 | struct ceph_x_info *xi = ac->private; | |
85 | struct rb_node *parent = NULL, **p = &xi->ticket_handlers.rb_node; | |
86 | ||
87 | while (*p) { | |
88 | parent = *p; | |
89 | th = rb_entry(parent, struct ceph_x_ticket_handler, node); | |
90 | if (service < th->service) | |
91 | p = &(*p)->rb_left; | |
92 | else if (service > th->service) | |
93 | p = &(*p)->rb_right; | |
94 | else | |
95 | return th; | |
96 | } | |
97 | ||
98 | /* add it */ | |
99 | th = kzalloc(sizeof(*th), GFP_NOFS); | |
100 | if (!th) | |
101 | return ERR_PTR(-ENOMEM); | |
102 | th->service = service; | |
103 | rb_link_node(&th->node, parent, p); | |
104 | rb_insert_color(&th->node, &xi->ticket_handlers); | |
105 | return th; | |
106 | } | |
107 | ||
108 | static void remove_ticket_handler(struct ceph_auth_client *ac, | |
109 | struct ceph_x_ticket_handler *th) | |
110 | { | |
111 | struct ceph_x_info *xi = ac->private; | |
112 | ||
113 | dout("remove_ticket_handler %p %d\n", th, th->service); | |
114 | rb_erase(&th->node, &xi->ticket_handlers); | |
115 | ceph_crypto_key_destroy(&th->session_key); | |
116 | if (th->ticket_blob) | |
117 | ceph_buffer_put(th->ticket_blob); | |
118 | kfree(th); | |
119 | } | |
120 | ||
121 | static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac, | |
122 | struct ceph_crypto_key *secret, | |
123 | void *buf, void *end) | |
124 | { | |
125 | struct ceph_x_info *xi = ac->private; | |
126 | int num; | |
127 | void *p = buf; | |
128 | int ret; | |
129 | char *dbuf; | |
130 | char *ticket_buf; | |
131 | u8 struct_v; | |
132 | ||
133 | dbuf = kmem_cache_alloc(ceph_x_ticketbuf_cachep, GFP_NOFS | GFP_ATOMIC); | |
134 | if (!dbuf) | |
135 | return -ENOMEM; | |
136 | ||
137 | ret = -ENOMEM; | |
138 | ticket_buf = kmem_cache_alloc(ceph_x_ticketbuf_cachep, | |
139 | GFP_NOFS | GFP_ATOMIC); | |
140 | if (!ticket_buf) | |
141 | goto out_dbuf; | |
142 | ||
143 | ceph_decode_need(&p, end, 1 + sizeof(u32), bad); | |
144 | struct_v = ceph_decode_8(&p); | |
145 | if (struct_v != 1) | |
146 | goto bad; | |
147 | num = ceph_decode_32(&p); | |
148 | dout("%d tickets\n", num); | |
149 | while (num--) { | |
150 | int type; | |
151 | u8 struct_v; | |
152 | struct ceph_x_ticket_handler *th; | |
153 | void *dp, *dend; | |
154 | int dlen; | |
155 | char is_enc; | |
156 | struct timespec validity; | |
157 | struct ceph_crypto_key old_key; | |
158 | void *tp, *tpend; | |
0a990e70 SW |
159 | struct ceph_timespec new_validity; |
160 | struct ceph_crypto_key new_session_key; | |
5b3dbb44 | 161 | struct ceph_buffer *new_ticket_blob; |
0a990e70 SW |
162 | unsigned long new_expires, new_renew_after; |
163 | u64 new_secret_id; | |
ec0994e4 SW |
164 | |
165 | ceph_decode_need(&p, end, sizeof(u32) + 1, bad); | |
166 | ||
167 | type = ceph_decode_32(&p); | |
168 | dout(" ticket type %d %s\n", type, ceph_entity_type_name(type)); | |
169 | ||
170 | struct_v = ceph_decode_8(&p); | |
171 | if (struct_v != 1) | |
172 | goto bad; | |
173 | ||
174 | th = get_ticket_handler(ac, type); | |
175 | if (IS_ERR(th)) { | |
176 | ret = PTR_ERR(th); | |
177 | goto out; | |
178 | } | |
179 | ||
180 | /* blob for me */ | |
181 | dlen = ceph_x_decrypt(secret, &p, end, dbuf, | |
182 | TEMP_TICKET_BUF_LEN); | |
183 | if (dlen <= 0) { | |
184 | ret = dlen; | |
185 | goto out; | |
186 | } | |
187 | dout(" decrypted %d bytes\n", dlen); | |
188 | dend = dbuf + dlen; | |
189 | dp = dbuf; | |
190 | ||
191 | struct_v = ceph_decode_8(&dp); | |
192 | if (struct_v != 1) | |
193 | goto bad; | |
194 | ||
195 | memcpy(&old_key, &th->session_key, sizeof(old_key)); | |
0a990e70 | 196 | ret = ceph_crypto_key_decode(&new_session_key, &dp, dend); |
ec0994e4 SW |
197 | if (ret) |
198 | goto out; | |
199 | ||
0a990e70 SW |
200 | ceph_decode_copy(&dp, &new_validity, sizeof(new_validity)); |
201 | ceph_decode_timespec(&validity, &new_validity); | |
202 | new_expires = get_seconds() + validity.tv_sec; | |
203 | new_renew_after = new_expires - (validity.tv_sec / 4); | |
204 | dout(" expires=%lu renew_after=%lu\n", new_expires, | |
205 | new_renew_after); | |
ec0994e4 SW |
206 | |
207 | /* ticket blob for service */ | |
208 | ceph_decode_8_safe(&p, end, is_enc, bad); | |
209 | tp = ticket_buf; | |
210 | if (is_enc) { | |
211 | /* encrypted */ | |
212 | dout(" encrypted ticket\n"); | |
213 | dlen = ceph_x_decrypt(&old_key, &p, end, ticket_buf, | |
214 | TEMP_TICKET_BUF_LEN); | |
215 | if (dlen < 0) { | |
216 | ret = dlen; | |
217 | goto out; | |
218 | } | |
219 | dlen = ceph_decode_32(&tp); | |
220 | } else { | |
221 | /* unencrypted */ | |
222 | ceph_decode_32_safe(&p, end, dlen, bad); | |
223 | ceph_decode_need(&p, end, dlen, bad); | |
224 | ceph_decode_copy(&p, ticket_buf, dlen); | |
225 | } | |
226 | tpend = tp + dlen; | |
227 | dout(" ticket blob is %d bytes\n", dlen); | |
228 | ceph_decode_need(&tp, tpend, 1 + sizeof(u64), bad); | |
229 | struct_v = ceph_decode_8(&tp); | |
0a990e70 | 230 | new_secret_id = ceph_decode_64(&tp); |
5b3dbb44 | 231 | ret = ceph_decode_buffer(&new_ticket_blob, &tp, tpend); |
ec0994e4 SW |
232 | if (ret) |
233 | goto out; | |
0a990e70 SW |
234 | |
235 | /* all is well, update our ticket */ | |
236 | ceph_crypto_key_destroy(&th->session_key); | |
5b3dbb44 SW |
237 | if (th->ticket_blob) |
238 | ceph_buffer_put(th->ticket_blob); | |
0a990e70 | 239 | th->session_key = new_session_key; |
5b3dbb44 | 240 | th->ticket_blob = new_ticket_blob; |
0a990e70 SW |
241 | th->validity = new_validity; |
242 | th->secret_id = new_secret_id; | |
243 | th->expires = new_expires; | |
244 | th->renew_after = new_renew_after; | |
ec0994e4 SW |
245 | dout(" got ticket service %d (%s) secret_id %lld len %d\n", |
246 | type, ceph_entity_type_name(type), th->secret_id, | |
247 | (int)th->ticket_blob->vec.iov_len); | |
248 | xi->have_keys |= th->service; | |
249 | } | |
250 | ||
251 | ret = 0; | |
252 | out: | |
253 | kmem_cache_free(ceph_x_ticketbuf_cachep, ticket_buf); | |
254 | out_dbuf: | |
255 | kmem_cache_free(ceph_x_ticketbuf_cachep, dbuf); | |
256 | return ret; | |
257 | ||
258 | bad: | |
259 | ret = -EINVAL; | |
260 | goto out; | |
261 | } | |
262 | ||
263 | static int ceph_x_build_authorizer(struct ceph_auth_client *ac, | |
264 | struct ceph_x_ticket_handler *th, | |
265 | struct ceph_x_authorizer *au) | |
266 | { | |
807c86e2 | 267 | int maxlen; |
ec0994e4 SW |
268 | struct ceph_x_authorize_a *msg_a; |
269 | struct ceph_x_authorize_b msg_b; | |
270 | void *p, *end; | |
271 | int ret; | |
272 | int ticket_blob_len = | |
273 | (th->ticket_blob ? th->ticket_blob->vec.iov_len : 0); | |
274 | ||
275 | dout("build_authorizer for %s %p\n", | |
276 | ceph_entity_type_name(th->service), au); | |
277 | ||
807c86e2 SW |
278 | maxlen = sizeof(*msg_a) + sizeof(msg_b) + |
279 | ceph_x_encrypt_buflen(ticket_blob_len); | |
280 | dout(" need len %d\n", maxlen); | |
281 | if (au->buf && au->buf->alloc_len < maxlen) { | |
ec0994e4 SW |
282 | ceph_buffer_put(au->buf); |
283 | au->buf = NULL; | |
284 | } | |
285 | if (!au->buf) { | |
807c86e2 | 286 | au->buf = ceph_buffer_new(maxlen, GFP_NOFS); |
ec0994e4 SW |
287 | if (!au->buf) |
288 | return -ENOMEM; | |
289 | } | |
290 | au->service = th->service; | |
291 | ||
292 | msg_a = au->buf->vec.iov_base; | |
293 | msg_a->struct_v = 1; | |
294 | msg_a->global_id = cpu_to_le64(ac->global_id); | |
295 | msg_a->service_id = cpu_to_le32(th->service); | |
296 | msg_a->ticket_blob.struct_v = 1; | |
297 | msg_a->ticket_blob.secret_id = cpu_to_le64(th->secret_id); | |
298 | msg_a->ticket_blob.blob_len = cpu_to_le32(ticket_blob_len); | |
299 | if (ticket_blob_len) { | |
300 | memcpy(msg_a->ticket_blob.blob, th->ticket_blob->vec.iov_base, | |
301 | th->ticket_blob->vec.iov_len); | |
302 | } | |
303 | dout(" th %p secret_id %lld %lld\n", th, th->secret_id, | |
304 | le64_to_cpu(msg_a->ticket_blob.secret_id)); | |
305 | ||
306 | p = msg_a + 1; | |
307 | p += ticket_blob_len; | |
308 | end = au->buf->vec.iov_base + au->buf->vec.iov_len; | |
309 | ||
310 | get_random_bytes(&au->nonce, sizeof(au->nonce)); | |
311 | msg_b.struct_v = 1; | |
312 | msg_b.nonce = cpu_to_le64(au->nonce); | |
313 | ret = ceph_x_encrypt(&th->session_key, &msg_b, sizeof(msg_b), | |
314 | p, end - p); | |
315 | if (ret < 0) | |
316 | goto out_buf; | |
317 | p += ret; | |
318 | au->buf->vec.iov_len = p - au->buf->vec.iov_base; | |
319 | dout(" built authorizer nonce %llx len %d\n", au->nonce, | |
320 | (int)au->buf->vec.iov_len); | |
807c86e2 | 321 | BUG_ON(au->buf->vec.iov_len > maxlen); |
ec0994e4 SW |
322 | return 0; |
323 | ||
324 | out_buf: | |
325 | ceph_buffer_put(au->buf); | |
326 | au->buf = NULL; | |
327 | return ret; | |
328 | } | |
329 | ||
330 | static int ceph_x_encode_ticket(struct ceph_x_ticket_handler *th, | |
331 | void **p, void *end) | |
332 | { | |
333 | ceph_decode_need(p, end, 1 + sizeof(u64), bad); | |
334 | ceph_encode_8(p, 1); | |
335 | ceph_encode_64(p, th->secret_id); | |
336 | if (th->ticket_blob) { | |
337 | const char *buf = th->ticket_blob->vec.iov_base; | |
338 | u32 len = th->ticket_blob->vec.iov_len; | |
339 | ||
340 | ceph_encode_32_safe(p, end, len, bad); | |
341 | ceph_encode_copy_safe(p, end, buf, len, bad); | |
342 | } else { | |
343 | ceph_encode_32_safe(p, end, 0, bad); | |
344 | } | |
345 | ||
346 | return 0; | |
347 | bad: | |
348 | return -ERANGE; | |
349 | } | |
350 | ||
351 | static void ceph_x_validate_tickets(struct ceph_auth_client *ac, int *pneed) | |
352 | { | |
353 | int want = ac->want_keys; | |
354 | struct ceph_x_info *xi = ac->private; | |
355 | int service; | |
356 | ||
357 | *pneed = ac->want_keys & ~(xi->have_keys); | |
358 | ||
359 | for (service = 1; service <= want; service <<= 1) { | |
360 | struct ceph_x_ticket_handler *th; | |
361 | ||
362 | if (!(ac->want_keys & service)) | |
363 | continue; | |
364 | ||
365 | if (*pneed & service) | |
366 | continue; | |
367 | ||
368 | th = get_ticket_handler(ac, service); | |
369 | ||
370 | if (!th) { | |
371 | *pneed |= service; | |
372 | continue; | |
373 | } | |
374 | ||
375 | if (get_seconds() >= th->renew_after) | |
376 | *pneed |= service; | |
377 | if (get_seconds() >= th->expires) | |
378 | xi->have_keys &= ~service; | |
379 | } | |
380 | } | |
381 | ||
382 | ||
383 | static int ceph_x_build_request(struct ceph_auth_client *ac, | |
384 | void *buf, void *end) | |
385 | { | |
386 | struct ceph_x_info *xi = ac->private; | |
387 | int need; | |
388 | struct ceph_x_request_header *head = buf; | |
389 | int ret; | |
390 | struct ceph_x_ticket_handler *th = | |
391 | get_ticket_handler(ac, CEPH_ENTITY_TYPE_AUTH); | |
392 | ||
393 | ceph_x_validate_tickets(ac, &need); | |
394 | ||
395 | dout("build_request want %x have %x need %x\n", | |
396 | ac->want_keys, xi->have_keys, need); | |
397 | ||
398 | if (need & CEPH_ENTITY_TYPE_AUTH) { | |
399 | struct ceph_x_authenticate *auth = (void *)(head + 1); | |
400 | void *p = auth + 1; | |
401 | struct ceph_x_challenge_blob tmp; | |
402 | char tmp_enc[40]; | |
403 | u64 *u; | |
404 | ||
405 | if (p > end) | |
406 | return -ERANGE; | |
407 | ||
408 | dout(" get_auth_session_key\n"); | |
409 | head->op = cpu_to_le16(CEPHX_GET_AUTH_SESSION_KEY); | |
410 | ||
411 | /* encrypt and hash */ | |
412 | get_random_bytes(&auth->client_challenge, sizeof(u64)); | |
413 | tmp.client_challenge = auth->client_challenge; | |
414 | tmp.server_challenge = cpu_to_le64(xi->server_challenge); | |
415 | ret = ceph_x_encrypt(&xi->secret, &tmp, sizeof(tmp), | |
416 | tmp_enc, sizeof(tmp_enc)); | |
417 | if (ret < 0) | |
418 | return ret; | |
419 | ||
420 | auth->struct_v = 1; | |
421 | auth->key = 0; | |
422 | for (u = (u64 *)tmp_enc; u + 1 <= (u64 *)(tmp_enc + ret); u++) | |
423 | auth->key ^= *u; | |
424 | dout(" server_challenge %llx client_challenge %llx key %llx\n", | |
425 | xi->server_challenge, le64_to_cpu(auth->client_challenge), | |
426 | le64_to_cpu(auth->key)); | |
427 | ||
428 | /* now encode the old ticket if exists */ | |
429 | ret = ceph_x_encode_ticket(th, &p, end); | |
430 | if (ret < 0) | |
431 | return ret; | |
432 | ||
433 | return p - buf; | |
434 | } | |
435 | ||
436 | if (need) { | |
437 | void *p = head + 1; | |
438 | struct ceph_x_service_ticket_request *req; | |
439 | ||
440 | if (p > end) | |
441 | return -ERANGE; | |
442 | head->op = cpu_to_le16(CEPHX_GET_PRINCIPAL_SESSION_KEY); | |
443 | ||
444 | BUG_ON(!th); | |
445 | ret = ceph_x_build_authorizer(ac, th, &xi->auth_authorizer); | |
446 | if (ret) | |
447 | return ret; | |
448 | ceph_encode_copy(&p, xi->auth_authorizer.buf->vec.iov_base, | |
449 | xi->auth_authorizer.buf->vec.iov_len); | |
450 | ||
451 | req = p; | |
452 | req->keys = cpu_to_le32(need); | |
453 | p += sizeof(*req); | |
454 | return p - buf; | |
455 | } | |
456 | ||
457 | return 0; | |
458 | } | |
459 | ||
460 | static int ceph_x_handle_reply(struct ceph_auth_client *ac, int result, | |
461 | void *buf, void *end) | |
462 | { | |
463 | struct ceph_x_info *xi = ac->private; | |
464 | struct ceph_x_reply_header *head = buf; | |
465 | struct ceph_x_ticket_handler *th; | |
466 | int len = end - buf; | |
467 | int op; | |
468 | int ret; | |
469 | ||
470 | if (result) | |
471 | return result; /* XXX hmm? */ | |
472 | ||
473 | if (xi->starting) { | |
474 | /* it's a hello */ | |
475 | struct ceph_x_server_challenge *sc = buf; | |
476 | ||
477 | if (len != sizeof(*sc)) | |
478 | return -EINVAL; | |
479 | xi->server_challenge = le64_to_cpu(sc->server_challenge); | |
480 | dout("handle_reply got server challenge %llx\n", | |
481 | xi->server_challenge); | |
482 | xi->starting = false; | |
483 | xi->have_keys &= ~CEPH_ENTITY_TYPE_AUTH; | |
484 | return -EAGAIN; | |
485 | } | |
486 | ||
487 | op = le32_to_cpu(head->op); | |
488 | result = le32_to_cpu(head->result); | |
489 | dout("handle_reply op %d result %d\n", op, result); | |
490 | switch (op) { | |
491 | case CEPHX_GET_AUTH_SESSION_KEY: | |
492 | /* verify auth key */ | |
493 | ret = ceph_x_proc_ticket_reply(ac, &xi->secret, | |
494 | buf + sizeof(*head), end); | |
495 | break; | |
496 | ||
497 | case CEPHX_GET_PRINCIPAL_SESSION_KEY: | |
498 | th = get_ticket_handler(ac, CEPH_ENTITY_TYPE_AUTH); | |
499 | BUG_ON(!th); | |
500 | ret = ceph_x_proc_ticket_reply(ac, &th->session_key, | |
501 | buf + sizeof(*head), end); | |
502 | break; | |
503 | ||
504 | default: | |
505 | return -EINVAL; | |
506 | } | |
507 | if (ret) | |
508 | return ret; | |
509 | if (ac->want_keys == xi->have_keys) | |
510 | return 0; | |
511 | return -EAGAIN; | |
512 | } | |
513 | ||
514 | static int ceph_x_create_authorizer( | |
515 | struct ceph_auth_client *ac, int peer_type, | |
516 | struct ceph_authorizer **a, | |
517 | void **buf, size_t *len, | |
518 | void **reply_buf, size_t *reply_len) | |
519 | { | |
520 | struct ceph_x_authorizer *au; | |
521 | struct ceph_x_ticket_handler *th; | |
522 | int ret; | |
523 | ||
524 | th = get_ticket_handler(ac, peer_type); | |
525 | if (IS_ERR(th)) | |
526 | return PTR_ERR(th); | |
527 | ||
528 | au = kzalloc(sizeof(*au), GFP_NOFS); | |
529 | if (!au) | |
530 | return -ENOMEM; | |
531 | ||
532 | ret = ceph_x_build_authorizer(ac, th, au); | |
533 | if (ret) { | |
534 | kfree(au); | |
535 | return ret; | |
536 | } | |
537 | ||
538 | *a = (struct ceph_authorizer *)au; | |
539 | *buf = au->buf->vec.iov_base; | |
540 | *len = au->buf->vec.iov_len; | |
541 | *reply_buf = au->reply_buf; | |
542 | *reply_len = sizeof(au->reply_buf); | |
543 | return 0; | |
544 | } | |
545 | ||
546 | static int ceph_x_verify_authorizer_reply(struct ceph_auth_client *ac, | |
547 | struct ceph_authorizer *a, size_t len) | |
548 | { | |
549 | struct ceph_x_authorizer *au = (void *)a; | |
550 | struct ceph_x_ticket_handler *th; | |
551 | int ret = 0; | |
552 | struct ceph_x_authorize_reply reply; | |
553 | void *p = au->reply_buf; | |
554 | void *end = p + sizeof(au->reply_buf); | |
555 | ||
556 | th = get_ticket_handler(ac, au->service); | |
557 | if (!th) | |
558 | return -EIO; /* hrm! */ | |
559 | ret = ceph_x_decrypt(&th->session_key, &p, end, &reply, sizeof(reply)); | |
560 | if (ret < 0) | |
561 | return ret; | |
562 | if (ret != sizeof(reply)) | |
563 | return -EPERM; | |
564 | ||
565 | if (au->nonce + 1 != le64_to_cpu(reply.nonce_plus_one)) | |
566 | ret = -EPERM; | |
567 | else | |
568 | ret = 0; | |
569 | dout("verify_authorizer_reply nonce %llx got %llx ret %d\n", | |
570 | au->nonce, le64_to_cpu(reply.nonce_plus_one), ret); | |
571 | return ret; | |
572 | } | |
573 | ||
574 | static void ceph_x_destroy_authorizer(struct ceph_auth_client *ac, | |
575 | struct ceph_authorizer *a) | |
576 | { | |
577 | struct ceph_x_authorizer *au = (void *)a; | |
578 | ||
579 | ceph_buffer_put(au->buf); | |
580 | kfree(au); | |
581 | } | |
582 | ||
583 | ||
584 | static void ceph_x_reset(struct ceph_auth_client *ac) | |
585 | { | |
586 | struct ceph_x_info *xi = ac->private; | |
587 | ||
588 | dout("reset\n"); | |
589 | xi->starting = true; | |
590 | xi->server_challenge = 0; | |
591 | } | |
592 | ||
593 | static void ceph_x_destroy(struct ceph_auth_client *ac) | |
594 | { | |
595 | struct ceph_x_info *xi = ac->private; | |
596 | struct rb_node *p; | |
597 | ||
598 | dout("ceph_x_destroy %p\n", ac); | |
599 | ceph_crypto_key_destroy(&xi->secret); | |
600 | ||
601 | while ((p = rb_first(&xi->ticket_handlers)) != NULL) { | |
602 | struct ceph_x_ticket_handler *th = | |
603 | rb_entry(p, struct ceph_x_ticket_handler, node); | |
604 | remove_ticket_handler(ac, th); | |
605 | } | |
606 | ||
607 | kmem_cache_destroy(ceph_x_ticketbuf_cachep); | |
608 | ||
609 | kfree(ac->private); | |
610 | ac->private = NULL; | |
611 | } | |
612 | ||
613 | static void ceph_x_invalidate_authorizer(struct ceph_auth_client *ac, | |
614 | int peer_type) | |
615 | { | |
616 | struct ceph_x_ticket_handler *th; | |
617 | ||
618 | th = get_ticket_handler(ac, peer_type); | |
619 | if (th && !IS_ERR(th)) | |
620 | remove_ticket_handler(ac, th); | |
621 | } | |
622 | ||
623 | ||
624 | static const struct ceph_auth_client_ops ceph_x_ops = { | |
625 | .is_authenticated = ceph_x_is_authenticated, | |
626 | .build_request = ceph_x_build_request, | |
627 | .handle_reply = ceph_x_handle_reply, | |
628 | .create_authorizer = ceph_x_create_authorizer, | |
629 | .verify_authorizer_reply = ceph_x_verify_authorizer_reply, | |
630 | .destroy_authorizer = ceph_x_destroy_authorizer, | |
631 | .invalidate_authorizer = ceph_x_invalidate_authorizer, | |
632 | .reset = ceph_x_reset, | |
633 | .destroy = ceph_x_destroy, | |
634 | }; | |
635 | ||
636 | ||
637 | int ceph_x_init(struct ceph_auth_client *ac) | |
638 | { | |
639 | struct ceph_x_info *xi; | |
640 | int ret; | |
641 | ||
642 | dout("ceph_x_init %p\n", ac); | |
643 | xi = kzalloc(sizeof(*xi), GFP_NOFS); | |
644 | if (!xi) | |
645 | return -ENOMEM; | |
646 | ||
647 | ret = -ENOMEM; | |
648 | ceph_x_ticketbuf_cachep = kmem_cache_create("ceph_x_ticketbuf", | |
649 | TEMP_TICKET_BUF_LEN, 8, | |
650 | (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), | |
651 | NULL); | |
652 | if (!ceph_x_ticketbuf_cachep) | |
653 | goto done_nomem; | |
654 | ret = -EINVAL; | |
655 | if (!ac->secret) { | |
656 | pr_err("no secret set (for auth_x protocol)\n"); | |
657 | goto done_nomem; | |
658 | } | |
659 | ||
660 | ret = ceph_crypto_key_unarmor(&xi->secret, ac->secret); | |
661 | if (ret) | |
662 | goto done_nomem; | |
663 | ||
664 | xi->starting = true; | |
665 | xi->ticket_handlers = RB_ROOT; | |
666 | ||
667 | ac->protocol = CEPH_AUTH_CEPHX; | |
668 | ac->private = xi; | |
669 | ac->ops = &ceph_x_ops; | |
670 | return 0; | |
671 | ||
672 | done_nomem: | |
673 | kfree(xi); | |
674 | if (ceph_x_ticketbuf_cachep) | |
675 | kmem_cache_destroy(ceph_x_ticketbuf_cachep); | |
676 | return ret; | |
677 | } | |
678 | ||
679 |