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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> | |
5a0e3ad6 | 7 | #include <linux/slab.h> |
ec0994e4 SW |
8 | |
9 | #include "auth_x.h" | |
10 | #include "auth_x_protocol.h" | |
11 | #include "crypto.h" | |
12 | #include "auth.h" | |
13 | #include "decode.h" | |
14 | ||
15 | struct kmem_cache *ceph_x_ticketbuf_cachep; | |
16 | ||
17 | #define TEMP_TICKET_BUF_LEN 256 | |
18 | ||
19 | static void ceph_x_validate_tickets(struct ceph_auth_client *ac, int *pneed); | |
20 | ||
21 | static int ceph_x_is_authenticated(struct ceph_auth_client *ac) | |
22 | { | |
23 | struct ceph_x_info *xi = ac->private; | |
24 | int need; | |
25 | ||
26 | ceph_x_validate_tickets(ac, &need); | |
27 | dout("ceph_x_is_authenticated want=%d need=%d have=%d\n", | |
28 | ac->want_keys, need, xi->have_keys); | |
29 | return (ac->want_keys & xi->have_keys) == ac->want_keys; | |
30 | } | |
31 | ||
807c86e2 SW |
32 | static int ceph_x_encrypt_buflen(int ilen) |
33 | { | |
34 | return sizeof(struct ceph_x_encrypt_header) + ilen + 16 + | |
35 | sizeof(u32); | |
36 | } | |
37 | ||
ec0994e4 SW |
38 | static int ceph_x_encrypt(struct ceph_crypto_key *secret, |
39 | void *ibuf, int ilen, void *obuf, size_t olen) | |
40 | { | |
41 | struct ceph_x_encrypt_header head = { | |
42 | .struct_v = 1, | |
43 | .magic = cpu_to_le64(CEPHX_ENC_MAGIC) | |
44 | }; | |
45 | size_t len = olen - sizeof(u32); | |
46 | int ret; | |
47 | ||
48 | ret = ceph_encrypt2(secret, obuf + sizeof(u32), &len, | |
49 | &head, sizeof(head), ibuf, ilen); | |
50 | if (ret) | |
51 | return ret; | |
52 | ceph_encode_32(&obuf, len); | |
53 | return len + sizeof(u32); | |
54 | } | |
55 | ||
56 | static int ceph_x_decrypt(struct ceph_crypto_key *secret, | |
57 | void **p, void *end, void *obuf, size_t olen) | |
58 | { | |
59 | struct ceph_x_encrypt_header head; | |
60 | size_t head_len = sizeof(head); | |
61 | int len, ret; | |
62 | ||
63 | len = ceph_decode_32(p); | |
64 | if (*p + len > end) | |
65 | return -EINVAL; | |
66 | ||
67 | dout("ceph_x_decrypt len %d\n", len); | |
68 | ret = ceph_decrypt2(secret, &head, &head_len, obuf, &olen, | |
69 | *p, len); | |
70 | if (ret) | |
71 | return ret; | |
72 | if (head.struct_v != 1 || le64_to_cpu(head.magic) != CEPHX_ENC_MAGIC) | |
73 | return -EPERM; | |
74 | *p += len; | |
75 | return olen; | |
76 | } | |
77 | ||
78 | /* | |
79 | * get existing (or insert new) ticket handler | |
80 | */ | |
81 | struct ceph_x_ticket_handler *get_ticket_handler(struct ceph_auth_client *ac, | |
82 | int service) | |
83 | { | |
84 | struct ceph_x_ticket_handler *th; | |
85 | struct ceph_x_info *xi = ac->private; | |
86 | struct rb_node *parent = NULL, **p = &xi->ticket_handlers.rb_node; | |
87 | ||
88 | while (*p) { | |
89 | parent = *p; | |
90 | th = rb_entry(parent, struct ceph_x_ticket_handler, node); | |
91 | if (service < th->service) | |
92 | p = &(*p)->rb_left; | |
93 | else if (service > th->service) | |
94 | p = &(*p)->rb_right; | |
95 | else | |
96 | return th; | |
97 | } | |
98 | ||
99 | /* add it */ | |
100 | th = kzalloc(sizeof(*th), GFP_NOFS); | |
101 | if (!th) | |
102 | return ERR_PTR(-ENOMEM); | |
103 | th->service = service; | |
104 | rb_link_node(&th->node, parent, p); | |
105 | rb_insert_color(&th->node, &xi->ticket_handlers); | |
106 | return th; | |
107 | } | |
108 | ||
109 | static void remove_ticket_handler(struct ceph_auth_client *ac, | |
110 | struct ceph_x_ticket_handler *th) | |
111 | { | |
112 | struct ceph_x_info *xi = ac->private; | |
113 | ||
114 | dout("remove_ticket_handler %p %d\n", th, th->service); | |
115 | rb_erase(&th->node, &xi->ticket_handlers); | |
116 | ceph_crypto_key_destroy(&th->session_key); | |
117 | if (th->ticket_blob) | |
118 | ceph_buffer_put(th->ticket_blob); | |
119 | kfree(th); | |
120 | } | |
121 | ||
122 | static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac, | |
123 | struct ceph_crypto_key *secret, | |
124 | void *buf, void *end) | |
125 | { | |
126 | struct ceph_x_info *xi = ac->private; | |
127 | int num; | |
128 | void *p = buf; | |
129 | int ret; | |
130 | char *dbuf; | |
131 | char *ticket_buf; | |
132 | u8 struct_v; | |
133 | ||
134 | dbuf = kmem_cache_alloc(ceph_x_ticketbuf_cachep, GFP_NOFS | GFP_ATOMIC); | |
135 | if (!dbuf) | |
136 | return -ENOMEM; | |
137 | ||
138 | ret = -ENOMEM; | |
139 | ticket_buf = kmem_cache_alloc(ceph_x_ticketbuf_cachep, | |
140 | GFP_NOFS | GFP_ATOMIC); | |
141 | if (!ticket_buf) | |
142 | goto out_dbuf; | |
143 | ||
144 | ceph_decode_need(&p, end, 1 + sizeof(u32), bad); | |
145 | struct_v = ceph_decode_8(&p); | |
146 | if (struct_v != 1) | |
147 | goto bad; | |
148 | num = ceph_decode_32(&p); | |
149 | dout("%d tickets\n", num); | |
150 | while (num--) { | |
151 | int type; | |
152 | u8 struct_v; | |
153 | struct ceph_x_ticket_handler *th; | |
154 | void *dp, *dend; | |
155 | int dlen; | |
156 | char is_enc; | |
157 | struct timespec validity; | |
158 | struct ceph_crypto_key old_key; | |
159 | void *tp, *tpend; | |
0a990e70 SW |
160 | struct ceph_timespec new_validity; |
161 | struct ceph_crypto_key new_session_key; | |
5b3dbb44 | 162 | struct ceph_buffer *new_ticket_blob; |
0a990e70 SW |
163 | unsigned long new_expires, new_renew_after; |
164 | u64 new_secret_id; | |
ec0994e4 SW |
165 | |
166 | ceph_decode_need(&p, end, sizeof(u32) + 1, bad); | |
167 | ||
168 | type = ceph_decode_32(&p); | |
169 | dout(" ticket type %d %s\n", type, ceph_entity_type_name(type)); | |
170 | ||
171 | struct_v = ceph_decode_8(&p); | |
172 | if (struct_v != 1) | |
173 | goto bad; | |
174 | ||
175 | th = get_ticket_handler(ac, type); | |
176 | if (IS_ERR(th)) { | |
177 | ret = PTR_ERR(th); | |
178 | goto out; | |
179 | } | |
180 | ||
181 | /* blob for me */ | |
182 | dlen = ceph_x_decrypt(secret, &p, end, dbuf, | |
183 | TEMP_TICKET_BUF_LEN); | |
184 | if (dlen <= 0) { | |
185 | ret = dlen; | |
186 | goto out; | |
187 | } | |
188 | dout(" decrypted %d bytes\n", dlen); | |
189 | dend = dbuf + dlen; | |
190 | dp = dbuf; | |
191 | ||
192 | struct_v = ceph_decode_8(&dp); | |
193 | if (struct_v != 1) | |
194 | goto bad; | |
195 | ||
196 | memcpy(&old_key, &th->session_key, sizeof(old_key)); | |
0a990e70 | 197 | ret = ceph_crypto_key_decode(&new_session_key, &dp, dend); |
ec0994e4 SW |
198 | if (ret) |
199 | goto out; | |
200 | ||
0a990e70 SW |
201 | ceph_decode_copy(&dp, &new_validity, sizeof(new_validity)); |
202 | ceph_decode_timespec(&validity, &new_validity); | |
203 | new_expires = get_seconds() + validity.tv_sec; | |
204 | new_renew_after = new_expires - (validity.tv_sec / 4); | |
205 | dout(" expires=%lu renew_after=%lu\n", new_expires, | |
206 | new_renew_after); | |
ec0994e4 SW |
207 | |
208 | /* ticket blob for service */ | |
209 | ceph_decode_8_safe(&p, end, is_enc, bad); | |
210 | tp = ticket_buf; | |
211 | if (is_enc) { | |
212 | /* encrypted */ | |
213 | dout(" encrypted ticket\n"); | |
214 | dlen = ceph_x_decrypt(&old_key, &p, end, ticket_buf, | |
215 | TEMP_TICKET_BUF_LEN); | |
216 | if (dlen < 0) { | |
217 | ret = dlen; | |
218 | goto out; | |
219 | } | |
220 | dlen = ceph_decode_32(&tp); | |
221 | } else { | |
222 | /* unencrypted */ | |
223 | ceph_decode_32_safe(&p, end, dlen, bad); | |
224 | ceph_decode_need(&p, end, dlen, bad); | |
225 | ceph_decode_copy(&p, ticket_buf, dlen); | |
226 | } | |
227 | tpend = tp + dlen; | |
228 | dout(" ticket blob is %d bytes\n", dlen); | |
229 | ceph_decode_need(&tp, tpend, 1 + sizeof(u64), bad); | |
230 | struct_v = ceph_decode_8(&tp); | |
0a990e70 | 231 | new_secret_id = ceph_decode_64(&tp); |
5b3dbb44 | 232 | ret = ceph_decode_buffer(&new_ticket_blob, &tp, tpend); |
ec0994e4 SW |
233 | if (ret) |
234 | goto out; | |
0a990e70 SW |
235 | |
236 | /* all is well, update our ticket */ | |
237 | ceph_crypto_key_destroy(&th->session_key); | |
5b3dbb44 SW |
238 | if (th->ticket_blob) |
239 | ceph_buffer_put(th->ticket_blob); | |
0a990e70 | 240 | th->session_key = new_session_key; |
5b3dbb44 | 241 | th->ticket_blob = new_ticket_blob; |
0a990e70 SW |
242 | th->validity = new_validity; |
243 | th->secret_id = new_secret_id; | |
244 | th->expires = new_expires; | |
245 | th->renew_after = new_renew_after; | |
ec0994e4 SW |
246 | dout(" got ticket service %d (%s) secret_id %lld len %d\n", |
247 | type, ceph_entity_type_name(type), th->secret_id, | |
248 | (int)th->ticket_blob->vec.iov_len); | |
249 | xi->have_keys |= th->service; | |
250 | } | |
251 | ||
252 | ret = 0; | |
253 | out: | |
254 | kmem_cache_free(ceph_x_ticketbuf_cachep, ticket_buf); | |
255 | out_dbuf: | |
256 | kmem_cache_free(ceph_x_ticketbuf_cachep, dbuf); | |
257 | return ret; | |
258 | ||
259 | bad: | |
260 | ret = -EINVAL; | |
261 | goto out; | |
262 | } | |
263 | ||
264 | static int ceph_x_build_authorizer(struct ceph_auth_client *ac, | |
265 | struct ceph_x_ticket_handler *th, | |
266 | struct ceph_x_authorizer *au) | |
267 | { | |
807c86e2 | 268 | int maxlen; |
ec0994e4 SW |
269 | struct ceph_x_authorize_a *msg_a; |
270 | struct ceph_x_authorize_b msg_b; | |
271 | void *p, *end; | |
272 | int ret; | |
273 | int ticket_blob_len = | |
274 | (th->ticket_blob ? th->ticket_blob->vec.iov_len : 0); | |
275 | ||
276 | dout("build_authorizer for %s %p\n", | |
277 | ceph_entity_type_name(th->service), au); | |
278 | ||
807c86e2 SW |
279 | maxlen = sizeof(*msg_a) + sizeof(msg_b) + |
280 | ceph_x_encrypt_buflen(ticket_blob_len); | |
281 | dout(" need len %d\n", maxlen); | |
282 | if (au->buf && au->buf->alloc_len < maxlen) { | |
ec0994e4 SW |
283 | ceph_buffer_put(au->buf); |
284 | au->buf = NULL; | |
285 | } | |
286 | if (!au->buf) { | |
807c86e2 | 287 | au->buf = ceph_buffer_new(maxlen, GFP_NOFS); |
ec0994e4 SW |
288 | if (!au->buf) |
289 | return -ENOMEM; | |
290 | } | |
291 | au->service = th->service; | |
292 | ||
293 | msg_a = au->buf->vec.iov_base; | |
294 | msg_a->struct_v = 1; | |
295 | msg_a->global_id = cpu_to_le64(ac->global_id); | |
296 | msg_a->service_id = cpu_to_le32(th->service); | |
297 | msg_a->ticket_blob.struct_v = 1; | |
298 | msg_a->ticket_blob.secret_id = cpu_to_le64(th->secret_id); | |
299 | msg_a->ticket_blob.blob_len = cpu_to_le32(ticket_blob_len); | |
300 | if (ticket_blob_len) { | |
301 | memcpy(msg_a->ticket_blob.blob, th->ticket_blob->vec.iov_base, | |
302 | th->ticket_blob->vec.iov_len); | |
303 | } | |
304 | dout(" th %p secret_id %lld %lld\n", th, th->secret_id, | |
305 | le64_to_cpu(msg_a->ticket_blob.secret_id)); | |
306 | ||
307 | p = msg_a + 1; | |
308 | p += ticket_blob_len; | |
309 | end = au->buf->vec.iov_base + au->buf->vec.iov_len; | |
310 | ||
311 | get_random_bytes(&au->nonce, sizeof(au->nonce)); | |
312 | msg_b.struct_v = 1; | |
313 | msg_b.nonce = cpu_to_le64(au->nonce); | |
314 | ret = ceph_x_encrypt(&th->session_key, &msg_b, sizeof(msg_b), | |
315 | p, end - p); | |
316 | if (ret < 0) | |
317 | goto out_buf; | |
318 | p += ret; | |
319 | au->buf->vec.iov_len = p - au->buf->vec.iov_base; | |
320 | dout(" built authorizer nonce %llx len %d\n", au->nonce, | |
321 | (int)au->buf->vec.iov_len); | |
807c86e2 | 322 | BUG_ON(au->buf->vec.iov_len > maxlen); |
ec0994e4 SW |
323 | return 0; |
324 | ||
325 | out_buf: | |
326 | ceph_buffer_put(au->buf); | |
327 | au->buf = NULL; | |
328 | return ret; | |
329 | } | |
330 | ||
331 | static int ceph_x_encode_ticket(struct ceph_x_ticket_handler *th, | |
332 | void **p, void *end) | |
333 | { | |
334 | ceph_decode_need(p, end, 1 + sizeof(u64), bad); | |
335 | ceph_encode_8(p, 1); | |
336 | ceph_encode_64(p, th->secret_id); | |
337 | if (th->ticket_blob) { | |
338 | const char *buf = th->ticket_blob->vec.iov_base; | |
339 | u32 len = th->ticket_blob->vec.iov_len; | |
340 | ||
341 | ceph_encode_32_safe(p, end, len, bad); | |
342 | ceph_encode_copy_safe(p, end, buf, len, bad); | |
343 | } else { | |
344 | ceph_encode_32_safe(p, end, 0, bad); | |
345 | } | |
346 | ||
347 | return 0; | |
348 | bad: | |
349 | return -ERANGE; | |
350 | } | |
351 | ||
352 | static void ceph_x_validate_tickets(struct ceph_auth_client *ac, int *pneed) | |
353 | { | |
354 | int want = ac->want_keys; | |
355 | struct ceph_x_info *xi = ac->private; | |
356 | int service; | |
357 | ||
358 | *pneed = ac->want_keys & ~(xi->have_keys); | |
359 | ||
360 | for (service = 1; service <= want; service <<= 1) { | |
361 | struct ceph_x_ticket_handler *th; | |
362 | ||
363 | if (!(ac->want_keys & service)) | |
364 | continue; | |
365 | ||
366 | if (*pneed & service) | |
367 | continue; | |
368 | ||
369 | th = get_ticket_handler(ac, service); | |
370 | ||
371 | if (!th) { | |
372 | *pneed |= service; | |
373 | continue; | |
374 | } | |
375 | ||
376 | if (get_seconds() >= th->renew_after) | |
377 | *pneed |= service; | |
378 | if (get_seconds() >= th->expires) | |
379 | xi->have_keys &= ~service; | |
380 | } | |
381 | } | |
382 | ||
383 | ||
384 | static int ceph_x_build_request(struct ceph_auth_client *ac, | |
385 | void *buf, void *end) | |
386 | { | |
387 | struct ceph_x_info *xi = ac->private; | |
388 | int need; | |
389 | struct ceph_x_request_header *head = buf; | |
390 | int ret; | |
391 | struct ceph_x_ticket_handler *th = | |
392 | get_ticket_handler(ac, CEPH_ENTITY_TYPE_AUTH); | |
393 | ||
394 | ceph_x_validate_tickets(ac, &need); | |
395 | ||
396 | dout("build_request want %x have %x need %x\n", | |
397 | ac->want_keys, xi->have_keys, need); | |
398 | ||
399 | if (need & CEPH_ENTITY_TYPE_AUTH) { | |
400 | struct ceph_x_authenticate *auth = (void *)(head + 1); | |
401 | void *p = auth + 1; | |
402 | struct ceph_x_challenge_blob tmp; | |
403 | char tmp_enc[40]; | |
404 | u64 *u; | |
405 | ||
406 | if (p > end) | |
407 | return -ERANGE; | |
408 | ||
409 | dout(" get_auth_session_key\n"); | |
410 | head->op = cpu_to_le16(CEPHX_GET_AUTH_SESSION_KEY); | |
411 | ||
412 | /* encrypt and hash */ | |
413 | get_random_bytes(&auth->client_challenge, sizeof(u64)); | |
414 | tmp.client_challenge = auth->client_challenge; | |
415 | tmp.server_challenge = cpu_to_le64(xi->server_challenge); | |
416 | ret = ceph_x_encrypt(&xi->secret, &tmp, sizeof(tmp), | |
417 | tmp_enc, sizeof(tmp_enc)); | |
418 | if (ret < 0) | |
419 | return ret; | |
420 | ||
421 | auth->struct_v = 1; | |
422 | auth->key = 0; | |
423 | for (u = (u64 *)tmp_enc; u + 1 <= (u64 *)(tmp_enc + ret); u++) | |
424 | auth->key ^= *u; | |
425 | dout(" server_challenge %llx client_challenge %llx key %llx\n", | |
426 | xi->server_challenge, le64_to_cpu(auth->client_challenge), | |
427 | le64_to_cpu(auth->key)); | |
428 | ||
429 | /* now encode the old ticket if exists */ | |
430 | ret = ceph_x_encode_ticket(th, &p, end); | |
431 | if (ret < 0) | |
432 | return ret; | |
433 | ||
434 | return p - buf; | |
435 | } | |
436 | ||
437 | if (need) { | |
438 | void *p = head + 1; | |
439 | struct ceph_x_service_ticket_request *req; | |
440 | ||
441 | if (p > end) | |
442 | return -ERANGE; | |
443 | head->op = cpu_to_le16(CEPHX_GET_PRINCIPAL_SESSION_KEY); | |
444 | ||
445 | BUG_ON(!th); | |
446 | ret = ceph_x_build_authorizer(ac, th, &xi->auth_authorizer); | |
447 | if (ret) | |
448 | return ret; | |
449 | ceph_encode_copy(&p, xi->auth_authorizer.buf->vec.iov_base, | |
450 | xi->auth_authorizer.buf->vec.iov_len); | |
451 | ||
452 | req = p; | |
453 | req->keys = cpu_to_le32(need); | |
454 | p += sizeof(*req); | |
455 | return p - buf; | |
456 | } | |
457 | ||
458 | return 0; | |
459 | } | |
460 | ||
461 | static int ceph_x_handle_reply(struct ceph_auth_client *ac, int result, | |
462 | void *buf, void *end) | |
463 | { | |
464 | struct ceph_x_info *xi = ac->private; | |
465 | struct ceph_x_reply_header *head = buf; | |
466 | struct ceph_x_ticket_handler *th; | |
467 | int len = end - buf; | |
468 | int op; | |
469 | int ret; | |
470 | ||
471 | if (result) | |
472 | return result; /* XXX hmm? */ | |
473 | ||
474 | if (xi->starting) { | |
475 | /* it's a hello */ | |
476 | struct ceph_x_server_challenge *sc = buf; | |
477 | ||
478 | if (len != sizeof(*sc)) | |
479 | return -EINVAL; | |
480 | xi->server_challenge = le64_to_cpu(sc->server_challenge); | |
481 | dout("handle_reply got server challenge %llx\n", | |
482 | xi->server_challenge); | |
483 | xi->starting = false; | |
484 | xi->have_keys &= ~CEPH_ENTITY_TYPE_AUTH; | |
485 | return -EAGAIN; | |
486 | } | |
487 | ||
488 | op = le32_to_cpu(head->op); | |
489 | result = le32_to_cpu(head->result); | |
490 | dout("handle_reply op %d result %d\n", op, result); | |
491 | switch (op) { | |
492 | case CEPHX_GET_AUTH_SESSION_KEY: | |
493 | /* verify auth key */ | |
494 | ret = ceph_x_proc_ticket_reply(ac, &xi->secret, | |
495 | buf + sizeof(*head), end); | |
496 | break; | |
497 | ||
498 | case CEPHX_GET_PRINCIPAL_SESSION_KEY: | |
499 | th = get_ticket_handler(ac, CEPH_ENTITY_TYPE_AUTH); | |
500 | BUG_ON(!th); | |
501 | ret = ceph_x_proc_ticket_reply(ac, &th->session_key, | |
502 | buf + sizeof(*head), end); | |
503 | break; | |
504 | ||
505 | default: | |
506 | return -EINVAL; | |
507 | } | |
508 | if (ret) | |
509 | return ret; | |
510 | if (ac->want_keys == xi->have_keys) | |
511 | return 0; | |
512 | return -EAGAIN; | |
513 | } | |
514 | ||
515 | static int ceph_x_create_authorizer( | |
516 | struct ceph_auth_client *ac, int peer_type, | |
517 | struct ceph_authorizer **a, | |
518 | void **buf, size_t *len, | |
519 | void **reply_buf, size_t *reply_len) | |
520 | { | |
521 | struct ceph_x_authorizer *au; | |
522 | struct ceph_x_ticket_handler *th; | |
523 | int ret; | |
524 | ||
525 | th = get_ticket_handler(ac, peer_type); | |
526 | if (IS_ERR(th)) | |
527 | return PTR_ERR(th); | |
528 | ||
529 | au = kzalloc(sizeof(*au), GFP_NOFS); | |
530 | if (!au) | |
531 | return -ENOMEM; | |
532 | ||
533 | ret = ceph_x_build_authorizer(ac, th, au); | |
534 | if (ret) { | |
535 | kfree(au); | |
536 | return ret; | |
537 | } | |
538 | ||
539 | *a = (struct ceph_authorizer *)au; | |
540 | *buf = au->buf->vec.iov_base; | |
541 | *len = au->buf->vec.iov_len; | |
542 | *reply_buf = au->reply_buf; | |
543 | *reply_len = sizeof(au->reply_buf); | |
544 | return 0; | |
545 | } | |
546 | ||
547 | static int ceph_x_verify_authorizer_reply(struct ceph_auth_client *ac, | |
548 | struct ceph_authorizer *a, size_t len) | |
549 | { | |
550 | struct ceph_x_authorizer *au = (void *)a; | |
551 | struct ceph_x_ticket_handler *th; | |
552 | int ret = 0; | |
553 | struct ceph_x_authorize_reply reply; | |
554 | void *p = au->reply_buf; | |
555 | void *end = p + sizeof(au->reply_buf); | |
556 | ||
557 | th = get_ticket_handler(ac, au->service); | |
558 | if (!th) | |
559 | return -EIO; /* hrm! */ | |
560 | ret = ceph_x_decrypt(&th->session_key, &p, end, &reply, sizeof(reply)); | |
561 | if (ret < 0) | |
562 | return ret; | |
563 | if (ret != sizeof(reply)) | |
564 | return -EPERM; | |
565 | ||
566 | if (au->nonce + 1 != le64_to_cpu(reply.nonce_plus_one)) | |
567 | ret = -EPERM; | |
568 | else | |
569 | ret = 0; | |
570 | dout("verify_authorizer_reply nonce %llx got %llx ret %d\n", | |
571 | au->nonce, le64_to_cpu(reply.nonce_plus_one), ret); | |
572 | return ret; | |
573 | } | |
574 | ||
575 | static void ceph_x_destroy_authorizer(struct ceph_auth_client *ac, | |
576 | struct ceph_authorizer *a) | |
577 | { | |
578 | struct ceph_x_authorizer *au = (void *)a; | |
579 | ||
580 | ceph_buffer_put(au->buf); | |
581 | kfree(au); | |
582 | } | |
583 | ||
584 | ||
585 | static void ceph_x_reset(struct ceph_auth_client *ac) | |
586 | { | |
587 | struct ceph_x_info *xi = ac->private; | |
588 | ||
589 | dout("reset\n"); | |
590 | xi->starting = true; | |
591 | xi->server_challenge = 0; | |
592 | } | |
593 | ||
594 | static void ceph_x_destroy(struct ceph_auth_client *ac) | |
595 | { | |
596 | struct ceph_x_info *xi = ac->private; | |
597 | struct rb_node *p; | |
598 | ||
599 | dout("ceph_x_destroy %p\n", ac); | |
600 | ceph_crypto_key_destroy(&xi->secret); | |
601 | ||
602 | while ((p = rb_first(&xi->ticket_handlers)) != NULL) { | |
603 | struct ceph_x_ticket_handler *th = | |
604 | rb_entry(p, struct ceph_x_ticket_handler, node); | |
605 | remove_ticket_handler(ac, th); | |
606 | } | |
607 | ||
608 | kmem_cache_destroy(ceph_x_ticketbuf_cachep); | |
609 | ||
610 | kfree(ac->private); | |
611 | ac->private = NULL; | |
612 | } | |
613 | ||
614 | static void ceph_x_invalidate_authorizer(struct ceph_auth_client *ac, | |
615 | int peer_type) | |
616 | { | |
617 | struct ceph_x_ticket_handler *th; | |
618 | ||
619 | th = get_ticket_handler(ac, peer_type); | |
620 | if (th && !IS_ERR(th)) | |
621 | remove_ticket_handler(ac, th); | |
622 | } | |
623 | ||
624 | ||
625 | static const struct ceph_auth_client_ops ceph_x_ops = { | |
626 | .is_authenticated = ceph_x_is_authenticated, | |
627 | .build_request = ceph_x_build_request, | |
628 | .handle_reply = ceph_x_handle_reply, | |
629 | .create_authorizer = ceph_x_create_authorizer, | |
630 | .verify_authorizer_reply = ceph_x_verify_authorizer_reply, | |
631 | .destroy_authorizer = ceph_x_destroy_authorizer, | |
632 | .invalidate_authorizer = ceph_x_invalidate_authorizer, | |
633 | .reset = ceph_x_reset, | |
634 | .destroy = ceph_x_destroy, | |
635 | }; | |
636 | ||
637 | ||
638 | int ceph_x_init(struct ceph_auth_client *ac) | |
639 | { | |
640 | struct ceph_x_info *xi; | |
641 | int ret; | |
642 | ||
643 | dout("ceph_x_init %p\n", ac); | |
644 | xi = kzalloc(sizeof(*xi), GFP_NOFS); | |
645 | if (!xi) | |
646 | return -ENOMEM; | |
647 | ||
648 | ret = -ENOMEM; | |
649 | ceph_x_ticketbuf_cachep = kmem_cache_create("ceph_x_ticketbuf", | |
650 | TEMP_TICKET_BUF_LEN, 8, | |
651 | (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), | |
652 | NULL); | |
653 | if (!ceph_x_ticketbuf_cachep) | |
654 | goto done_nomem; | |
655 | ret = -EINVAL; | |
656 | if (!ac->secret) { | |
657 | pr_err("no secret set (for auth_x protocol)\n"); | |
658 | goto done_nomem; | |
659 | } | |
660 | ||
661 | ret = ceph_crypto_key_unarmor(&xi->secret, ac->secret); | |
662 | if (ret) | |
663 | goto done_nomem; | |
664 | ||
665 | xi->starting = true; | |
666 | xi->ticket_handlers = RB_ROOT; | |
667 | ||
668 | ac->protocol = CEPH_AUTH_CEPHX; | |
669 | ac->private = xi; | |
670 | ac->ops = &ceph_x_ops; | |
671 | return 0; | |
672 | ||
673 | done_nomem: | |
674 | kfree(xi); | |
675 | if (ceph_x_ticketbuf_cachep) | |
676 | kmem_cache_destroy(ceph_x_ticketbuf_cachep); | |
677 | return ret; | |
678 | } | |
679 | ||
680 |