Commit | Line | Data |
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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 | ||
ec0994e4 SW |
15 | #define TEMP_TICKET_BUF_LEN 256 |
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 | ||
807c86e2 SW |
30 | static int ceph_x_encrypt_buflen(int ilen) |
31 | { | |
32 | return sizeof(struct ceph_x_encrypt_header) + ilen + 16 + | |
33 | sizeof(u32); | |
34 | } | |
35 | ||
ec0994e4 SW |
36 | static int ceph_x_encrypt(struct ceph_crypto_key *secret, |
37 | void *ibuf, int ilen, void *obuf, size_t olen) | |
38 | { | |
39 | struct ceph_x_encrypt_header head = { | |
40 | .struct_v = 1, | |
41 | .magic = cpu_to_le64(CEPHX_ENC_MAGIC) | |
42 | }; | |
43 | size_t len = olen - sizeof(u32); | |
44 | int ret; | |
45 | ||
46 | ret = ceph_encrypt2(secret, obuf + sizeof(u32), &len, | |
47 | &head, sizeof(head), ibuf, ilen); | |
48 | if (ret) | |
49 | return ret; | |
50 | ceph_encode_32(&obuf, len); | |
51 | return len + sizeof(u32); | |
52 | } | |
53 | ||
54 | static int ceph_x_decrypt(struct ceph_crypto_key *secret, | |
55 | void **p, void *end, void *obuf, size_t olen) | |
56 | { | |
57 | struct ceph_x_encrypt_header head; | |
58 | size_t head_len = sizeof(head); | |
59 | int len, ret; | |
60 | ||
61 | len = ceph_decode_32(p); | |
62 | if (*p + len > end) | |
63 | return -EINVAL; | |
64 | ||
65 | dout("ceph_x_decrypt len %d\n", len); | |
66 | ret = ceph_decrypt2(secret, &head, &head_len, obuf, &olen, | |
67 | *p, len); | |
68 | if (ret) | |
69 | return ret; | |
70 | if (head.struct_v != 1 || le64_to_cpu(head.magic) != CEPHX_ENC_MAGIC) | |
71 | return -EPERM; | |
72 | *p += len; | |
73 | return olen; | |
74 | } | |
75 | ||
76 | /* | |
77 | * get existing (or insert new) ticket handler | |
78 | */ | |
79 | struct ceph_x_ticket_handler *get_ticket_handler(struct ceph_auth_client *ac, | |
80 | int service) | |
81 | { | |
82 | struct ceph_x_ticket_handler *th; | |
83 | struct ceph_x_info *xi = ac->private; | |
84 | struct rb_node *parent = NULL, **p = &xi->ticket_handlers.rb_node; | |
85 | ||
86 | while (*p) { | |
87 | parent = *p; | |
88 | th = rb_entry(parent, struct ceph_x_ticket_handler, node); | |
89 | if (service < th->service) | |
90 | p = &(*p)->rb_left; | |
91 | else if (service > th->service) | |
92 | p = &(*p)->rb_right; | |
93 | else | |
94 | return th; | |
95 | } | |
96 | ||
97 | /* add it */ | |
98 | th = kzalloc(sizeof(*th), GFP_NOFS); | |
99 | if (!th) | |
100 | return ERR_PTR(-ENOMEM); | |
101 | th->service = service; | |
102 | rb_link_node(&th->node, parent, p); | |
103 | rb_insert_color(&th->node, &xi->ticket_handlers); | |
104 | return th; | |
105 | } | |
106 | ||
107 | static void remove_ticket_handler(struct ceph_auth_client *ac, | |
108 | struct ceph_x_ticket_handler *th) | |
109 | { | |
110 | struct ceph_x_info *xi = ac->private; | |
111 | ||
112 | dout("remove_ticket_handler %p %d\n", th, th->service); | |
113 | rb_erase(&th->node, &xi->ticket_handlers); | |
114 | ceph_crypto_key_destroy(&th->session_key); | |
115 | if (th->ticket_blob) | |
116 | ceph_buffer_put(th->ticket_blob); | |
117 | kfree(th); | |
118 | } | |
119 | ||
120 | static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac, | |
121 | struct ceph_crypto_key *secret, | |
122 | void *buf, void *end) | |
123 | { | |
124 | struct ceph_x_info *xi = ac->private; | |
125 | int num; | |
126 | void *p = buf; | |
127 | int ret; | |
128 | char *dbuf; | |
129 | char *ticket_buf; | |
130 | u8 struct_v; | |
131 | ||
b0930f8d | 132 | dbuf = kmalloc(TEMP_TICKET_BUF_LEN, GFP_NOFS); |
ec0994e4 SW |
133 | if (!dbuf) |
134 | return -ENOMEM; | |
135 | ||
136 | ret = -ENOMEM; | |
b0930f8d | 137 | ticket_buf = kmalloc(TEMP_TICKET_BUF_LEN, GFP_NOFS); |
ec0994e4 SW |
138 | if (!ticket_buf) |
139 | goto out_dbuf; | |
140 | ||
141 | ceph_decode_need(&p, end, 1 + sizeof(u32), bad); | |
142 | struct_v = ceph_decode_8(&p); | |
143 | if (struct_v != 1) | |
144 | goto bad; | |
145 | num = ceph_decode_32(&p); | |
146 | dout("%d tickets\n", num); | |
147 | while (num--) { | |
148 | int type; | |
149 | u8 struct_v; | |
150 | struct ceph_x_ticket_handler *th; | |
151 | void *dp, *dend; | |
152 | int dlen; | |
153 | char is_enc; | |
154 | struct timespec validity; | |
155 | struct ceph_crypto_key old_key; | |
156 | void *tp, *tpend; | |
0a990e70 SW |
157 | struct ceph_timespec new_validity; |
158 | struct ceph_crypto_key new_session_key; | |
5b3dbb44 | 159 | struct ceph_buffer *new_ticket_blob; |
0a990e70 SW |
160 | unsigned long new_expires, new_renew_after; |
161 | u64 new_secret_id; | |
ec0994e4 SW |
162 | |
163 | ceph_decode_need(&p, end, sizeof(u32) + 1, bad); | |
164 | ||
165 | type = ceph_decode_32(&p); | |
166 | dout(" ticket type %d %s\n", type, ceph_entity_type_name(type)); | |
167 | ||
168 | struct_v = ceph_decode_8(&p); | |
169 | if (struct_v != 1) | |
170 | goto bad; | |
171 | ||
172 | th = get_ticket_handler(ac, type); | |
173 | if (IS_ERR(th)) { | |
174 | ret = PTR_ERR(th); | |
175 | goto out; | |
176 | } | |
177 | ||
178 | /* blob for me */ | |
179 | dlen = ceph_x_decrypt(secret, &p, end, dbuf, | |
180 | TEMP_TICKET_BUF_LEN); | |
181 | if (dlen <= 0) { | |
182 | ret = dlen; | |
183 | goto out; | |
184 | } | |
185 | dout(" decrypted %d bytes\n", dlen); | |
186 | dend = dbuf + dlen; | |
187 | dp = dbuf; | |
188 | ||
189 | struct_v = ceph_decode_8(&dp); | |
190 | if (struct_v != 1) | |
191 | goto bad; | |
192 | ||
193 | memcpy(&old_key, &th->session_key, sizeof(old_key)); | |
0a990e70 | 194 | ret = ceph_crypto_key_decode(&new_session_key, &dp, dend); |
ec0994e4 SW |
195 | if (ret) |
196 | goto out; | |
197 | ||
0a990e70 SW |
198 | ceph_decode_copy(&dp, &new_validity, sizeof(new_validity)); |
199 | ceph_decode_timespec(&validity, &new_validity); | |
200 | new_expires = get_seconds() + validity.tv_sec; | |
201 | new_renew_after = new_expires - (validity.tv_sec / 4); | |
202 | dout(" expires=%lu renew_after=%lu\n", new_expires, | |
203 | new_renew_after); | |
ec0994e4 SW |
204 | |
205 | /* ticket blob for service */ | |
206 | ceph_decode_8_safe(&p, end, is_enc, bad); | |
207 | tp = ticket_buf; | |
208 | if (is_enc) { | |
209 | /* encrypted */ | |
210 | dout(" encrypted ticket\n"); | |
211 | dlen = ceph_x_decrypt(&old_key, &p, end, ticket_buf, | |
212 | TEMP_TICKET_BUF_LEN); | |
213 | if (dlen < 0) { | |
214 | ret = dlen; | |
215 | goto out; | |
216 | } | |
217 | dlen = ceph_decode_32(&tp); | |
218 | } else { | |
219 | /* unencrypted */ | |
220 | ceph_decode_32_safe(&p, end, dlen, bad); | |
221 | ceph_decode_need(&p, end, dlen, bad); | |
222 | ceph_decode_copy(&p, ticket_buf, dlen); | |
223 | } | |
224 | tpend = tp + dlen; | |
225 | dout(" ticket blob is %d bytes\n", dlen); | |
226 | ceph_decode_need(&tp, tpend, 1 + sizeof(u64), bad); | |
227 | struct_v = ceph_decode_8(&tp); | |
0a990e70 | 228 | new_secret_id = ceph_decode_64(&tp); |
5b3dbb44 | 229 | ret = ceph_decode_buffer(&new_ticket_blob, &tp, tpend); |
ec0994e4 SW |
230 | if (ret) |
231 | goto out; | |
0a990e70 SW |
232 | |
233 | /* all is well, update our ticket */ | |
234 | ceph_crypto_key_destroy(&th->session_key); | |
5b3dbb44 SW |
235 | if (th->ticket_blob) |
236 | ceph_buffer_put(th->ticket_blob); | |
0a990e70 | 237 | th->session_key = new_session_key; |
5b3dbb44 | 238 | th->ticket_blob = new_ticket_blob; |
0a990e70 SW |
239 | th->validity = new_validity; |
240 | th->secret_id = new_secret_id; | |
241 | th->expires = new_expires; | |
242 | th->renew_after = new_renew_after; | |
ec0994e4 SW |
243 | dout(" got ticket service %d (%s) secret_id %lld len %d\n", |
244 | type, ceph_entity_type_name(type), th->secret_id, | |
245 | (int)th->ticket_blob->vec.iov_len); | |
246 | xi->have_keys |= th->service; | |
247 | } | |
248 | ||
249 | ret = 0; | |
250 | out: | |
b0930f8d | 251 | kfree(ticket_buf); |
ec0994e4 | 252 | out_dbuf: |
b0930f8d | 253 | kfree(dbuf); |
ec0994e4 SW |
254 | return ret; |
255 | ||
256 | bad: | |
257 | ret = -EINVAL; | |
258 | goto out; | |
259 | } | |
260 | ||
261 | static int ceph_x_build_authorizer(struct ceph_auth_client *ac, | |
262 | struct ceph_x_ticket_handler *th, | |
263 | struct ceph_x_authorizer *au) | |
264 | { | |
807c86e2 | 265 | int maxlen; |
ec0994e4 SW |
266 | struct ceph_x_authorize_a *msg_a; |
267 | struct ceph_x_authorize_b msg_b; | |
268 | void *p, *end; | |
269 | int ret; | |
270 | int ticket_blob_len = | |
271 | (th->ticket_blob ? th->ticket_blob->vec.iov_len : 0); | |
272 | ||
273 | dout("build_authorizer for %s %p\n", | |
274 | ceph_entity_type_name(th->service), au); | |
275 | ||
807c86e2 SW |
276 | maxlen = sizeof(*msg_a) + sizeof(msg_b) + |
277 | ceph_x_encrypt_buflen(ticket_blob_len); | |
278 | dout(" need len %d\n", maxlen); | |
279 | if (au->buf && au->buf->alloc_len < maxlen) { | |
ec0994e4 SW |
280 | ceph_buffer_put(au->buf); |
281 | au->buf = NULL; | |
282 | } | |
283 | if (!au->buf) { | |
807c86e2 | 284 | au->buf = ceph_buffer_new(maxlen, GFP_NOFS); |
ec0994e4 SW |
285 | if (!au->buf) |
286 | return -ENOMEM; | |
287 | } | |
288 | au->service = th->service; | |
289 | ||
290 | msg_a = au->buf->vec.iov_base; | |
291 | msg_a->struct_v = 1; | |
292 | msg_a->global_id = cpu_to_le64(ac->global_id); | |
293 | msg_a->service_id = cpu_to_le32(th->service); | |
294 | msg_a->ticket_blob.struct_v = 1; | |
295 | msg_a->ticket_blob.secret_id = cpu_to_le64(th->secret_id); | |
296 | msg_a->ticket_blob.blob_len = cpu_to_le32(ticket_blob_len); | |
297 | if (ticket_blob_len) { | |
298 | memcpy(msg_a->ticket_blob.blob, th->ticket_blob->vec.iov_base, | |
299 | th->ticket_blob->vec.iov_len); | |
300 | } | |
301 | dout(" th %p secret_id %lld %lld\n", th, th->secret_id, | |
302 | le64_to_cpu(msg_a->ticket_blob.secret_id)); | |
303 | ||
304 | p = msg_a + 1; | |
305 | p += ticket_blob_len; | |
306 | end = au->buf->vec.iov_base + au->buf->vec.iov_len; | |
307 | ||
308 | get_random_bytes(&au->nonce, sizeof(au->nonce)); | |
309 | msg_b.struct_v = 1; | |
310 | msg_b.nonce = cpu_to_le64(au->nonce); | |
311 | ret = ceph_x_encrypt(&th->session_key, &msg_b, sizeof(msg_b), | |
312 | p, end - p); | |
313 | if (ret < 0) | |
314 | goto out_buf; | |
315 | p += ret; | |
316 | au->buf->vec.iov_len = p - au->buf->vec.iov_base; | |
317 | dout(" built authorizer nonce %llx len %d\n", au->nonce, | |
318 | (int)au->buf->vec.iov_len); | |
807c86e2 | 319 | BUG_ON(au->buf->vec.iov_len > maxlen); |
ec0994e4 SW |
320 | return 0; |
321 | ||
322 | out_buf: | |
323 | ceph_buffer_put(au->buf); | |
324 | au->buf = NULL; | |
325 | return ret; | |
326 | } | |
327 | ||
328 | static int ceph_x_encode_ticket(struct ceph_x_ticket_handler *th, | |
329 | void **p, void *end) | |
330 | { | |
331 | ceph_decode_need(p, end, 1 + sizeof(u64), bad); | |
332 | ceph_encode_8(p, 1); | |
333 | ceph_encode_64(p, th->secret_id); | |
334 | if (th->ticket_blob) { | |
335 | const char *buf = th->ticket_blob->vec.iov_base; | |
336 | u32 len = th->ticket_blob->vec.iov_len; | |
337 | ||
338 | ceph_encode_32_safe(p, end, len, bad); | |
339 | ceph_encode_copy_safe(p, end, buf, len, bad); | |
340 | } else { | |
341 | ceph_encode_32_safe(p, end, 0, bad); | |
342 | } | |
343 | ||
344 | return 0; | |
345 | bad: | |
346 | return -ERANGE; | |
347 | } | |
348 | ||
349 | static void ceph_x_validate_tickets(struct ceph_auth_client *ac, int *pneed) | |
350 | { | |
351 | int want = ac->want_keys; | |
352 | struct ceph_x_info *xi = ac->private; | |
353 | int service; | |
354 | ||
355 | *pneed = ac->want_keys & ~(xi->have_keys); | |
356 | ||
357 | for (service = 1; service <= want; service <<= 1) { | |
358 | struct ceph_x_ticket_handler *th; | |
359 | ||
360 | if (!(ac->want_keys & service)) | |
361 | continue; | |
362 | ||
363 | if (*pneed & service) | |
364 | continue; | |
365 | ||
366 | th = get_ticket_handler(ac, service); | |
367 | ||
368 | if (!th) { | |
369 | *pneed |= service; | |
370 | continue; | |
371 | } | |
372 | ||
373 | if (get_seconds() >= th->renew_after) | |
374 | *pneed |= service; | |
375 | if (get_seconds() >= th->expires) | |
376 | xi->have_keys &= ~service; | |
377 | } | |
378 | } | |
379 | ||
380 | ||
381 | static int ceph_x_build_request(struct ceph_auth_client *ac, | |
382 | void *buf, void *end) | |
383 | { | |
384 | struct ceph_x_info *xi = ac->private; | |
385 | int need; | |
386 | struct ceph_x_request_header *head = buf; | |
387 | int ret; | |
388 | struct ceph_x_ticket_handler *th = | |
389 | get_ticket_handler(ac, CEPH_ENTITY_TYPE_AUTH); | |
390 | ||
391 | ceph_x_validate_tickets(ac, &need); | |
392 | ||
393 | dout("build_request want %x have %x need %x\n", | |
394 | ac->want_keys, xi->have_keys, need); | |
395 | ||
396 | if (need & CEPH_ENTITY_TYPE_AUTH) { | |
397 | struct ceph_x_authenticate *auth = (void *)(head + 1); | |
398 | void *p = auth + 1; | |
399 | struct ceph_x_challenge_blob tmp; | |
400 | char tmp_enc[40]; | |
401 | u64 *u; | |
402 | ||
403 | if (p > end) | |
404 | return -ERANGE; | |
405 | ||
406 | dout(" get_auth_session_key\n"); | |
407 | head->op = cpu_to_le16(CEPHX_GET_AUTH_SESSION_KEY); | |
408 | ||
409 | /* encrypt and hash */ | |
410 | get_random_bytes(&auth->client_challenge, sizeof(u64)); | |
411 | tmp.client_challenge = auth->client_challenge; | |
412 | tmp.server_challenge = cpu_to_le64(xi->server_challenge); | |
413 | ret = ceph_x_encrypt(&xi->secret, &tmp, sizeof(tmp), | |
414 | tmp_enc, sizeof(tmp_enc)); | |
415 | if (ret < 0) | |
416 | return ret; | |
417 | ||
418 | auth->struct_v = 1; | |
419 | auth->key = 0; | |
420 | for (u = (u64 *)tmp_enc; u + 1 <= (u64 *)(tmp_enc + ret); u++) | |
421 | auth->key ^= *u; | |
422 | dout(" server_challenge %llx client_challenge %llx key %llx\n", | |
423 | xi->server_challenge, le64_to_cpu(auth->client_challenge), | |
424 | le64_to_cpu(auth->key)); | |
425 | ||
426 | /* now encode the old ticket if exists */ | |
427 | ret = ceph_x_encode_ticket(th, &p, end); | |
428 | if (ret < 0) | |
429 | return ret; | |
430 | ||
431 | return p - buf; | |
432 | } | |
433 | ||
434 | if (need) { | |
435 | void *p = head + 1; | |
436 | struct ceph_x_service_ticket_request *req; | |
437 | ||
438 | if (p > end) | |
439 | return -ERANGE; | |
440 | head->op = cpu_to_le16(CEPHX_GET_PRINCIPAL_SESSION_KEY); | |
441 | ||
442 | BUG_ON(!th); | |
443 | ret = ceph_x_build_authorizer(ac, th, &xi->auth_authorizer); | |
444 | if (ret) | |
445 | return ret; | |
446 | ceph_encode_copy(&p, xi->auth_authorizer.buf->vec.iov_base, | |
447 | xi->auth_authorizer.buf->vec.iov_len); | |
448 | ||
449 | req = p; | |
450 | req->keys = cpu_to_le32(need); | |
451 | p += sizeof(*req); | |
452 | return p - buf; | |
453 | } | |
454 | ||
455 | return 0; | |
456 | } | |
457 | ||
458 | static int ceph_x_handle_reply(struct ceph_auth_client *ac, int result, | |
459 | void *buf, void *end) | |
460 | { | |
461 | struct ceph_x_info *xi = ac->private; | |
462 | struct ceph_x_reply_header *head = buf; | |
463 | struct ceph_x_ticket_handler *th; | |
464 | int len = end - buf; | |
465 | int op; | |
466 | int ret; | |
467 | ||
468 | if (result) | |
469 | return result; /* XXX hmm? */ | |
470 | ||
471 | if (xi->starting) { | |
472 | /* it's a hello */ | |
473 | struct ceph_x_server_challenge *sc = buf; | |
474 | ||
475 | if (len != sizeof(*sc)) | |
476 | return -EINVAL; | |
477 | xi->server_challenge = le64_to_cpu(sc->server_challenge); | |
478 | dout("handle_reply got server challenge %llx\n", | |
479 | xi->server_challenge); | |
480 | xi->starting = false; | |
481 | xi->have_keys &= ~CEPH_ENTITY_TYPE_AUTH; | |
482 | return -EAGAIN; | |
483 | } | |
484 | ||
485 | op = le32_to_cpu(head->op); | |
486 | result = le32_to_cpu(head->result); | |
487 | dout("handle_reply op %d result %d\n", op, result); | |
488 | switch (op) { | |
489 | case CEPHX_GET_AUTH_SESSION_KEY: | |
490 | /* verify auth key */ | |
491 | ret = ceph_x_proc_ticket_reply(ac, &xi->secret, | |
492 | buf + sizeof(*head), end); | |
493 | break; | |
494 | ||
495 | case CEPHX_GET_PRINCIPAL_SESSION_KEY: | |
496 | th = get_ticket_handler(ac, CEPH_ENTITY_TYPE_AUTH); | |
497 | BUG_ON(!th); | |
498 | ret = ceph_x_proc_ticket_reply(ac, &th->session_key, | |
499 | buf + sizeof(*head), end); | |
500 | break; | |
501 | ||
502 | default: | |
503 | return -EINVAL; | |
504 | } | |
505 | if (ret) | |
506 | return ret; | |
507 | if (ac->want_keys == xi->have_keys) | |
508 | return 0; | |
509 | return -EAGAIN; | |
510 | } | |
511 | ||
512 | static int ceph_x_create_authorizer( | |
513 | struct ceph_auth_client *ac, int peer_type, | |
514 | struct ceph_authorizer **a, | |
515 | void **buf, size_t *len, | |
516 | void **reply_buf, size_t *reply_len) | |
517 | { | |
518 | struct ceph_x_authorizer *au; | |
519 | struct ceph_x_ticket_handler *th; | |
520 | int ret; | |
521 | ||
522 | th = get_ticket_handler(ac, peer_type); | |
523 | if (IS_ERR(th)) | |
524 | return PTR_ERR(th); | |
525 | ||
526 | au = kzalloc(sizeof(*au), GFP_NOFS); | |
527 | if (!au) | |
528 | return -ENOMEM; | |
529 | ||
530 | ret = ceph_x_build_authorizer(ac, th, au); | |
531 | if (ret) { | |
532 | kfree(au); | |
533 | return ret; | |
534 | } | |
535 | ||
536 | *a = (struct ceph_authorizer *)au; | |
537 | *buf = au->buf->vec.iov_base; | |
538 | *len = au->buf->vec.iov_len; | |
539 | *reply_buf = au->reply_buf; | |
540 | *reply_len = sizeof(au->reply_buf); | |
541 | return 0; | |
542 | } | |
543 | ||
544 | static int ceph_x_verify_authorizer_reply(struct ceph_auth_client *ac, | |
545 | struct ceph_authorizer *a, size_t len) | |
546 | { | |
547 | struct ceph_x_authorizer *au = (void *)a; | |
548 | struct ceph_x_ticket_handler *th; | |
549 | int ret = 0; | |
550 | struct ceph_x_authorize_reply reply; | |
551 | void *p = au->reply_buf; | |
552 | void *end = p + sizeof(au->reply_buf); | |
553 | ||
554 | th = get_ticket_handler(ac, au->service); | |
555 | if (!th) | |
556 | return -EIO; /* hrm! */ | |
557 | ret = ceph_x_decrypt(&th->session_key, &p, end, &reply, sizeof(reply)); | |
558 | if (ret < 0) | |
559 | return ret; | |
560 | if (ret != sizeof(reply)) | |
561 | return -EPERM; | |
562 | ||
563 | if (au->nonce + 1 != le64_to_cpu(reply.nonce_plus_one)) | |
564 | ret = -EPERM; | |
565 | else | |
566 | ret = 0; | |
567 | dout("verify_authorizer_reply nonce %llx got %llx ret %d\n", | |
568 | au->nonce, le64_to_cpu(reply.nonce_plus_one), ret); | |
569 | return ret; | |
570 | } | |
571 | ||
572 | static void ceph_x_destroy_authorizer(struct ceph_auth_client *ac, | |
573 | struct ceph_authorizer *a) | |
574 | { | |
575 | struct ceph_x_authorizer *au = (void *)a; | |
576 | ||
577 | ceph_buffer_put(au->buf); | |
578 | kfree(au); | |
579 | } | |
580 | ||
581 | ||
582 | static void ceph_x_reset(struct ceph_auth_client *ac) | |
583 | { | |
584 | struct ceph_x_info *xi = ac->private; | |
585 | ||
586 | dout("reset\n"); | |
587 | xi->starting = true; | |
588 | xi->server_challenge = 0; | |
589 | } | |
590 | ||
591 | static void ceph_x_destroy(struct ceph_auth_client *ac) | |
592 | { | |
593 | struct ceph_x_info *xi = ac->private; | |
594 | struct rb_node *p; | |
595 | ||
596 | dout("ceph_x_destroy %p\n", ac); | |
597 | ceph_crypto_key_destroy(&xi->secret); | |
598 | ||
599 | while ((p = rb_first(&xi->ticket_handlers)) != NULL) { | |
600 | struct ceph_x_ticket_handler *th = | |
601 | rb_entry(p, struct ceph_x_ticket_handler, node); | |
602 | remove_ticket_handler(ac, th); | |
603 | } | |
604 | ||
ec0994e4 SW |
605 | kfree(ac->private); |
606 | ac->private = NULL; | |
607 | } | |
608 | ||
609 | static void ceph_x_invalidate_authorizer(struct ceph_auth_client *ac, | |
610 | int peer_type) | |
611 | { | |
612 | struct ceph_x_ticket_handler *th; | |
613 | ||
614 | th = get_ticket_handler(ac, peer_type); | |
615 | if (th && !IS_ERR(th)) | |
616 | remove_ticket_handler(ac, th); | |
617 | } | |
618 | ||
619 | ||
620 | static const struct ceph_auth_client_ops ceph_x_ops = { | |
559c1e00 | 621 | .name = "x", |
ec0994e4 SW |
622 | .is_authenticated = ceph_x_is_authenticated, |
623 | .build_request = ceph_x_build_request, | |
624 | .handle_reply = ceph_x_handle_reply, | |
625 | .create_authorizer = ceph_x_create_authorizer, | |
626 | .verify_authorizer_reply = ceph_x_verify_authorizer_reply, | |
627 | .destroy_authorizer = ceph_x_destroy_authorizer, | |
628 | .invalidate_authorizer = ceph_x_invalidate_authorizer, | |
629 | .reset = ceph_x_reset, | |
630 | .destroy = ceph_x_destroy, | |
631 | }; | |
632 | ||
633 | ||
634 | int ceph_x_init(struct ceph_auth_client *ac) | |
635 | { | |
636 | struct ceph_x_info *xi; | |
637 | int ret; | |
638 | ||
639 | dout("ceph_x_init %p\n", ac); | |
b0930f8d | 640 | ret = -ENOMEM; |
ec0994e4 SW |
641 | xi = kzalloc(sizeof(*xi), GFP_NOFS); |
642 | if (!xi) | |
b0930f8d | 643 | goto out; |
ec0994e4 | 644 | |
ec0994e4 SW |
645 | ret = -EINVAL; |
646 | if (!ac->secret) { | |
647 | pr_err("no secret set (for auth_x protocol)\n"); | |
b0930f8d | 648 | goto out_nomem; |
ec0994e4 SW |
649 | } |
650 | ||
651 | ret = ceph_crypto_key_unarmor(&xi->secret, ac->secret); | |
652 | if (ret) | |
b0930f8d | 653 | goto out_nomem; |
ec0994e4 SW |
654 | |
655 | xi->starting = true; | |
656 | xi->ticket_handlers = RB_ROOT; | |
657 | ||
658 | ac->protocol = CEPH_AUTH_CEPHX; | |
659 | ac->private = xi; | |
660 | ac->ops = &ceph_x_ops; | |
661 | return 0; | |
662 | ||
b0930f8d | 663 | out_nomem: |
ec0994e4 | 664 | kfree(xi); |
b0930f8d | 665 | out: |
ec0994e4 SW |
666 | return ret; |
667 | } | |
668 | ||
669 |