blob: 582e0b2caf8a3ce6c2b943c0980c119be7950a63 [file] [log] [blame]
Sage Weilec0994e2010-02-02 16:25:35 -08001
2#include "ceph_debug.h"
3
4#include <linux/err.h>
5#include <linux/module.h>
6#include <linux/random.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +09007#include <linux/slab.h>
Sage Weilec0994e2010-02-02 16:25:35 -08008
9#include "auth_x.h"
10#include "auth_x_protocol.h"
11#include "crypto.h"
12#include "auth.h"
13#include "decode.h"
14
Sage Weilec0994e2010-02-02 16:25:35 -080015#define TEMP_TICKET_BUF_LEN 256
16
17static void ceph_x_validate_tickets(struct ceph_auth_client *ac, int *pneed);
18
19static 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
Sage Weila41359f2010-05-25 15:39:06 -070030static int ceph_x_should_authenticate(struct ceph_auth_client *ac)
31{
32 struct ceph_x_info *xi = ac->private;
33 int need;
34
35 ceph_x_validate_tickets(ac, &need);
36 dout("ceph_x_should_authenticate want=%d need=%d have=%d\n",
37 ac->want_keys, need, xi->have_keys);
38 return need != 0;
39}
40
Sage Weil807c86e2010-03-15 15:52:17 -070041static int ceph_x_encrypt_buflen(int ilen)
42{
43 return sizeof(struct ceph_x_encrypt_header) + ilen + 16 +
44 sizeof(u32);
45}
46
Sage Weilec0994e2010-02-02 16:25:35 -080047static int ceph_x_encrypt(struct ceph_crypto_key *secret,
48 void *ibuf, int ilen, void *obuf, size_t olen)
49{
50 struct ceph_x_encrypt_header head = {
51 .struct_v = 1,
52 .magic = cpu_to_le64(CEPHX_ENC_MAGIC)
53 };
54 size_t len = olen - sizeof(u32);
55 int ret;
56
57 ret = ceph_encrypt2(secret, obuf + sizeof(u32), &len,
58 &head, sizeof(head), ibuf, ilen);
59 if (ret)
60 return ret;
61 ceph_encode_32(&obuf, len);
62 return len + sizeof(u32);
63}
64
65static int ceph_x_decrypt(struct ceph_crypto_key *secret,
66 void **p, void *end, void *obuf, size_t olen)
67{
68 struct ceph_x_encrypt_header head;
69 size_t head_len = sizeof(head);
70 int len, ret;
71
72 len = ceph_decode_32(p);
73 if (*p + len > end)
74 return -EINVAL;
75
76 dout("ceph_x_decrypt len %d\n", len);
77 ret = ceph_decrypt2(secret, &head, &head_len, obuf, &olen,
78 *p, len);
79 if (ret)
80 return ret;
81 if (head.struct_v != 1 || le64_to_cpu(head.magic) != CEPHX_ENC_MAGIC)
82 return -EPERM;
83 *p += len;
84 return olen;
85}
86
87/*
88 * get existing (or insert new) ticket handler
89 */
Yehuda Sadehcd84db62010-06-11 16:58:48 -070090static struct ceph_x_ticket_handler *
91get_ticket_handler(struct ceph_auth_client *ac, int service)
Sage Weilec0994e2010-02-02 16:25:35 -080092{
93 struct ceph_x_ticket_handler *th;
94 struct ceph_x_info *xi = ac->private;
95 struct rb_node *parent = NULL, **p = &xi->ticket_handlers.rb_node;
96
97 while (*p) {
98 parent = *p;
99 th = rb_entry(parent, struct ceph_x_ticket_handler, node);
100 if (service < th->service)
101 p = &(*p)->rb_left;
102 else if (service > th->service)
103 p = &(*p)->rb_right;
104 else
105 return th;
106 }
107
108 /* add it */
109 th = kzalloc(sizeof(*th), GFP_NOFS);
110 if (!th)
111 return ERR_PTR(-ENOMEM);
112 th->service = service;
113 rb_link_node(&th->node, parent, p);
114 rb_insert_color(&th->node, &xi->ticket_handlers);
115 return th;
116}
117
118static void remove_ticket_handler(struct ceph_auth_client *ac,
119 struct ceph_x_ticket_handler *th)
120{
121 struct ceph_x_info *xi = ac->private;
122
123 dout("remove_ticket_handler %p %d\n", th, th->service);
124 rb_erase(&th->node, &xi->ticket_handlers);
125 ceph_crypto_key_destroy(&th->session_key);
126 if (th->ticket_blob)
127 ceph_buffer_put(th->ticket_blob);
128 kfree(th);
129}
130
131static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac,
132 struct ceph_crypto_key *secret,
133 void *buf, void *end)
134{
135 struct ceph_x_info *xi = ac->private;
136 int num;
137 void *p = buf;
138 int ret;
139 char *dbuf;
140 char *ticket_buf;
Sage Weilb736b3d2010-04-30 12:45:02 -0700141 u8 reply_struct_v;
Sage Weilec0994e2010-02-02 16:25:35 -0800142
Sage Weilb0930f82010-04-29 13:26:53 -0700143 dbuf = kmalloc(TEMP_TICKET_BUF_LEN, GFP_NOFS);
Sage Weilec0994e2010-02-02 16:25:35 -0800144 if (!dbuf)
145 return -ENOMEM;
146
147 ret = -ENOMEM;
Sage Weilb0930f82010-04-29 13:26:53 -0700148 ticket_buf = kmalloc(TEMP_TICKET_BUF_LEN, GFP_NOFS);
Sage Weilec0994e2010-02-02 16:25:35 -0800149 if (!ticket_buf)
150 goto out_dbuf;
151
152 ceph_decode_need(&p, end, 1 + sizeof(u32), bad);
Sage Weilb736b3d2010-04-30 12:45:02 -0700153 reply_struct_v = ceph_decode_8(&p);
154 if (reply_struct_v != 1)
Sage Weilec0994e2010-02-02 16:25:35 -0800155 goto bad;
156 num = ceph_decode_32(&p);
157 dout("%d tickets\n", num);
158 while (num--) {
159 int type;
Sage Weilb736b3d2010-04-30 12:45:02 -0700160 u8 tkt_struct_v, blob_struct_v;
Sage Weilec0994e2010-02-02 16:25:35 -0800161 struct ceph_x_ticket_handler *th;
162 void *dp, *dend;
163 int dlen;
164 char is_enc;
165 struct timespec validity;
166 struct ceph_crypto_key old_key;
167 void *tp, *tpend;
Sage Weil0a990e72010-03-15 16:12:25 -0700168 struct ceph_timespec new_validity;
169 struct ceph_crypto_key new_session_key;
Sage Weil5b3dbb42010-03-15 15:57:04 -0700170 struct ceph_buffer *new_ticket_blob;
Sage Weil0a990e72010-03-15 16:12:25 -0700171 unsigned long new_expires, new_renew_after;
172 u64 new_secret_id;
Sage Weilec0994e2010-02-02 16:25:35 -0800173
174 ceph_decode_need(&p, end, sizeof(u32) + 1, bad);
175
176 type = ceph_decode_32(&p);
177 dout(" ticket type %d %s\n", type, ceph_entity_type_name(type));
178
Sage Weilb736b3d2010-04-30 12:45:02 -0700179 tkt_struct_v = ceph_decode_8(&p);
180 if (tkt_struct_v != 1)
Sage Weilec0994e2010-02-02 16:25:35 -0800181 goto bad;
182
183 th = get_ticket_handler(ac, type);
184 if (IS_ERR(th)) {
185 ret = PTR_ERR(th);
186 goto out;
187 }
188
189 /* blob for me */
190 dlen = ceph_x_decrypt(secret, &p, end, dbuf,
191 TEMP_TICKET_BUF_LEN);
192 if (dlen <= 0) {
193 ret = dlen;
194 goto out;
195 }
196 dout(" decrypted %d bytes\n", dlen);
197 dend = dbuf + dlen;
198 dp = dbuf;
199
Sage Weilb736b3d2010-04-30 12:45:02 -0700200 tkt_struct_v = ceph_decode_8(&dp);
201 if (tkt_struct_v != 1)
Sage Weilec0994e2010-02-02 16:25:35 -0800202 goto bad;
203
204 memcpy(&old_key, &th->session_key, sizeof(old_key));
Sage Weil0a990e72010-03-15 16:12:25 -0700205 ret = ceph_crypto_key_decode(&new_session_key, &dp, dend);
Sage Weilec0994e2010-02-02 16:25:35 -0800206 if (ret)
207 goto out;
208
Sage Weil0a990e72010-03-15 16:12:25 -0700209 ceph_decode_copy(&dp, &new_validity, sizeof(new_validity));
210 ceph_decode_timespec(&validity, &new_validity);
211 new_expires = get_seconds() + validity.tv_sec;
212 new_renew_after = new_expires - (validity.tv_sec / 4);
213 dout(" expires=%lu renew_after=%lu\n", new_expires,
214 new_renew_after);
Sage Weilec0994e2010-02-02 16:25:35 -0800215
216 /* ticket blob for service */
217 ceph_decode_8_safe(&p, end, is_enc, bad);
218 tp = ticket_buf;
219 if (is_enc) {
220 /* encrypted */
221 dout(" encrypted ticket\n");
222 dlen = ceph_x_decrypt(&old_key, &p, end, ticket_buf,
223 TEMP_TICKET_BUF_LEN);
224 if (dlen < 0) {
225 ret = dlen;
226 goto out;
227 }
228 dlen = ceph_decode_32(&tp);
229 } else {
230 /* unencrypted */
231 ceph_decode_32_safe(&p, end, dlen, bad);
232 ceph_decode_need(&p, end, dlen, bad);
233 ceph_decode_copy(&p, ticket_buf, dlen);
234 }
235 tpend = tp + dlen;
236 dout(" ticket blob is %d bytes\n", dlen);
237 ceph_decode_need(&tp, tpend, 1 + sizeof(u64), bad);
Sage Weilb736b3d2010-04-30 12:45:02 -0700238 blob_struct_v = ceph_decode_8(&tp);
Sage Weil0a990e72010-03-15 16:12:25 -0700239 new_secret_id = ceph_decode_64(&tp);
Sage Weil5b3dbb42010-03-15 15:57:04 -0700240 ret = ceph_decode_buffer(&new_ticket_blob, &tp, tpend);
Sage Weilec0994e2010-02-02 16:25:35 -0800241 if (ret)
242 goto out;
Sage Weil0a990e72010-03-15 16:12:25 -0700243
244 /* all is well, update our ticket */
245 ceph_crypto_key_destroy(&th->session_key);
Sage Weil5b3dbb42010-03-15 15:57:04 -0700246 if (th->ticket_blob)
247 ceph_buffer_put(th->ticket_blob);
Sage Weil0a990e72010-03-15 16:12:25 -0700248 th->session_key = new_session_key;
Sage Weil5b3dbb42010-03-15 15:57:04 -0700249 th->ticket_blob = new_ticket_blob;
Sage Weil0a990e72010-03-15 16:12:25 -0700250 th->validity = new_validity;
251 th->secret_id = new_secret_id;
252 th->expires = new_expires;
253 th->renew_after = new_renew_after;
Sage Weilec0994e2010-02-02 16:25:35 -0800254 dout(" got ticket service %d (%s) secret_id %lld len %d\n",
255 type, ceph_entity_type_name(type), th->secret_id,
256 (int)th->ticket_blob->vec.iov_len);
257 xi->have_keys |= th->service;
258 }
259
260 ret = 0;
261out:
Sage Weilb0930f82010-04-29 13:26:53 -0700262 kfree(ticket_buf);
Sage Weilec0994e2010-02-02 16:25:35 -0800263out_dbuf:
Sage Weilb0930f82010-04-29 13:26:53 -0700264 kfree(dbuf);
Sage Weilec0994e2010-02-02 16:25:35 -0800265 return ret;
266
267bad:
268 ret = -EINVAL;
269 goto out;
270}
271
272static int ceph_x_build_authorizer(struct ceph_auth_client *ac,
273 struct ceph_x_ticket_handler *th,
274 struct ceph_x_authorizer *au)
275{
Sage Weil807c86e2010-03-15 15:52:17 -0700276 int maxlen;
Sage Weilec0994e2010-02-02 16:25:35 -0800277 struct ceph_x_authorize_a *msg_a;
278 struct ceph_x_authorize_b msg_b;
279 void *p, *end;
280 int ret;
281 int ticket_blob_len =
282 (th->ticket_blob ? th->ticket_blob->vec.iov_len : 0);
283
284 dout("build_authorizer for %s %p\n",
285 ceph_entity_type_name(th->service), au);
286
Sage Weil807c86e2010-03-15 15:52:17 -0700287 maxlen = sizeof(*msg_a) + sizeof(msg_b) +
288 ceph_x_encrypt_buflen(ticket_blob_len);
289 dout(" need len %d\n", maxlen);
290 if (au->buf && au->buf->alloc_len < maxlen) {
Sage Weilec0994e2010-02-02 16:25:35 -0800291 ceph_buffer_put(au->buf);
292 au->buf = NULL;
293 }
294 if (!au->buf) {
Sage Weil807c86e2010-03-15 15:52:17 -0700295 au->buf = ceph_buffer_new(maxlen, GFP_NOFS);
Sage Weilec0994e2010-02-02 16:25:35 -0800296 if (!au->buf)
297 return -ENOMEM;
298 }
299 au->service = th->service;
300
301 msg_a = au->buf->vec.iov_base;
302 msg_a->struct_v = 1;
303 msg_a->global_id = cpu_to_le64(ac->global_id);
304 msg_a->service_id = cpu_to_le32(th->service);
305 msg_a->ticket_blob.struct_v = 1;
306 msg_a->ticket_blob.secret_id = cpu_to_le64(th->secret_id);
307 msg_a->ticket_blob.blob_len = cpu_to_le32(ticket_blob_len);
308 if (ticket_blob_len) {
309 memcpy(msg_a->ticket_blob.blob, th->ticket_blob->vec.iov_base,
310 th->ticket_blob->vec.iov_len);
311 }
312 dout(" th %p secret_id %lld %lld\n", th, th->secret_id,
313 le64_to_cpu(msg_a->ticket_blob.secret_id));
314
315 p = msg_a + 1;
316 p += ticket_blob_len;
317 end = au->buf->vec.iov_base + au->buf->vec.iov_len;
318
319 get_random_bytes(&au->nonce, sizeof(au->nonce));
320 msg_b.struct_v = 1;
321 msg_b.nonce = cpu_to_le64(au->nonce);
322 ret = ceph_x_encrypt(&th->session_key, &msg_b, sizeof(msg_b),
323 p, end - p);
324 if (ret < 0)
325 goto out_buf;
326 p += ret;
327 au->buf->vec.iov_len = p - au->buf->vec.iov_base;
328 dout(" built authorizer nonce %llx len %d\n", au->nonce,
329 (int)au->buf->vec.iov_len);
Sage Weil807c86e2010-03-15 15:52:17 -0700330 BUG_ON(au->buf->vec.iov_len > maxlen);
Sage Weilec0994e2010-02-02 16:25:35 -0800331 return 0;
332
333out_buf:
334 ceph_buffer_put(au->buf);
335 au->buf = NULL;
336 return ret;
337}
338
339static int ceph_x_encode_ticket(struct ceph_x_ticket_handler *th,
340 void **p, void *end)
341{
342 ceph_decode_need(p, end, 1 + sizeof(u64), bad);
343 ceph_encode_8(p, 1);
344 ceph_encode_64(p, th->secret_id);
345 if (th->ticket_blob) {
346 const char *buf = th->ticket_blob->vec.iov_base;
347 u32 len = th->ticket_blob->vec.iov_len;
348
349 ceph_encode_32_safe(p, end, len, bad);
350 ceph_encode_copy_safe(p, end, buf, len, bad);
351 } else {
352 ceph_encode_32_safe(p, end, 0, bad);
353 }
354
355 return 0;
356bad:
357 return -ERANGE;
358}
359
360static void ceph_x_validate_tickets(struct ceph_auth_client *ac, int *pneed)
361{
362 int want = ac->want_keys;
363 struct ceph_x_info *xi = ac->private;
364 int service;
365
366 *pneed = ac->want_keys & ~(xi->have_keys);
367
368 for (service = 1; service <= want; service <<= 1) {
369 struct ceph_x_ticket_handler *th;
370
371 if (!(ac->want_keys & service))
372 continue;
373
374 if (*pneed & service)
375 continue;
376
377 th = get_ticket_handler(ac, service);
378
379 if (!th) {
380 *pneed |= service;
381 continue;
382 }
383
384 if (get_seconds() >= th->renew_after)
385 *pneed |= service;
386 if (get_seconds() >= th->expires)
387 xi->have_keys &= ~service;
388 }
389}
390
391
392static int ceph_x_build_request(struct ceph_auth_client *ac,
393 void *buf, void *end)
394{
395 struct ceph_x_info *xi = ac->private;
396 int need;
397 struct ceph_x_request_header *head = buf;
398 int ret;
399 struct ceph_x_ticket_handler *th =
400 get_ticket_handler(ac, CEPH_ENTITY_TYPE_AUTH);
401
402 ceph_x_validate_tickets(ac, &need);
403
404 dout("build_request want %x have %x need %x\n",
405 ac->want_keys, xi->have_keys, need);
406
407 if (need & CEPH_ENTITY_TYPE_AUTH) {
408 struct ceph_x_authenticate *auth = (void *)(head + 1);
409 void *p = auth + 1;
410 struct ceph_x_challenge_blob tmp;
411 char tmp_enc[40];
412 u64 *u;
413
414 if (p > end)
415 return -ERANGE;
416
417 dout(" get_auth_session_key\n");
418 head->op = cpu_to_le16(CEPHX_GET_AUTH_SESSION_KEY);
419
420 /* encrypt and hash */
421 get_random_bytes(&auth->client_challenge, sizeof(u64));
422 tmp.client_challenge = auth->client_challenge;
423 tmp.server_challenge = cpu_to_le64(xi->server_challenge);
424 ret = ceph_x_encrypt(&xi->secret, &tmp, sizeof(tmp),
425 tmp_enc, sizeof(tmp_enc));
426 if (ret < 0)
427 return ret;
428
429 auth->struct_v = 1;
430 auth->key = 0;
431 for (u = (u64 *)tmp_enc; u + 1 <= (u64 *)(tmp_enc + ret); u++)
Yehuda Sadehcd84db62010-06-11 16:58:48 -0700432 auth->key ^= *(__le64 *)u;
Sage Weilec0994e2010-02-02 16:25:35 -0800433 dout(" server_challenge %llx client_challenge %llx key %llx\n",
434 xi->server_challenge, le64_to_cpu(auth->client_challenge),
435 le64_to_cpu(auth->key));
436
437 /* now encode the old ticket if exists */
438 ret = ceph_x_encode_ticket(th, &p, end);
439 if (ret < 0)
440 return ret;
441
442 return p - buf;
443 }
444
445 if (need) {
446 void *p = head + 1;
447 struct ceph_x_service_ticket_request *req;
448
449 if (p > end)
450 return -ERANGE;
451 head->op = cpu_to_le16(CEPHX_GET_PRINCIPAL_SESSION_KEY);
452
453 BUG_ON(!th);
454 ret = ceph_x_build_authorizer(ac, th, &xi->auth_authorizer);
455 if (ret)
456 return ret;
457 ceph_encode_copy(&p, xi->auth_authorizer.buf->vec.iov_base,
458 xi->auth_authorizer.buf->vec.iov_len);
459
460 req = p;
461 req->keys = cpu_to_le32(need);
462 p += sizeof(*req);
463 return p - buf;
464 }
465
466 return 0;
467}
468
469static int ceph_x_handle_reply(struct ceph_auth_client *ac, int result,
470 void *buf, void *end)
471{
472 struct ceph_x_info *xi = ac->private;
473 struct ceph_x_reply_header *head = buf;
474 struct ceph_x_ticket_handler *th;
475 int len = end - buf;
476 int op;
477 int ret;
478
479 if (result)
480 return result; /* XXX hmm? */
481
482 if (xi->starting) {
483 /* it's a hello */
484 struct ceph_x_server_challenge *sc = buf;
485
486 if (len != sizeof(*sc))
487 return -EINVAL;
488 xi->server_challenge = le64_to_cpu(sc->server_challenge);
489 dout("handle_reply got server challenge %llx\n",
490 xi->server_challenge);
491 xi->starting = false;
492 xi->have_keys &= ~CEPH_ENTITY_TYPE_AUTH;
493 return -EAGAIN;
494 }
495
Yehuda Sadeh0cf55372010-06-11 15:57:06 -0700496 op = le16_to_cpu(head->op);
Sage Weilec0994e2010-02-02 16:25:35 -0800497 result = le32_to_cpu(head->result);
498 dout("handle_reply op %d result %d\n", op, result);
499 switch (op) {
500 case CEPHX_GET_AUTH_SESSION_KEY:
501 /* verify auth key */
502 ret = ceph_x_proc_ticket_reply(ac, &xi->secret,
503 buf + sizeof(*head), end);
504 break;
505
506 case CEPHX_GET_PRINCIPAL_SESSION_KEY:
507 th = get_ticket_handler(ac, CEPH_ENTITY_TYPE_AUTH);
508 BUG_ON(!th);
509 ret = ceph_x_proc_ticket_reply(ac, &th->session_key,
510 buf + sizeof(*head), end);
511 break;
512
513 default:
514 return -EINVAL;
515 }
516 if (ret)
517 return ret;
518 if (ac->want_keys == xi->have_keys)
519 return 0;
520 return -EAGAIN;
521}
522
523static int ceph_x_create_authorizer(
524 struct ceph_auth_client *ac, int peer_type,
525 struct ceph_authorizer **a,
526 void **buf, size_t *len,
527 void **reply_buf, size_t *reply_len)
528{
529 struct ceph_x_authorizer *au;
530 struct ceph_x_ticket_handler *th;
531 int ret;
532
533 th = get_ticket_handler(ac, peer_type);
534 if (IS_ERR(th))
535 return PTR_ERR(th);
536
537 au = kzalloc(sizeof(*au), GFP_NOFS);
538 if (!au)
539 return -ENOMEM;
540
541 ret = ceph_x_build_authorizer(ac, th, au);
542 if (ret) {
543 kfree(au);
544 return ret;
545 }
546
547 *a = (struct ceph_authorizer *)au;
548 *buf = au->buf->vec.iov_base;
549 *len = au->buf->vec.iov_len;
550 *reply_buf = au->reply_buf;
551 *reply_len = sizeof(au->reply_buf);
552 return 0;
553}
554
555static int ceph_x_verify_authorizer_reply(struct ceph_auth_client *ac,
556 struct ceph_authorizer *a, size_t len)
557{
558 struct ceph_x_authorizer *au = (void *)a;
559 struct ceph_x_ticket_handler *th;
560 int ret = 0;
561 struct ceph_x_authorize_reply reply;
562 void *p = au->reply_buf;
563 void *end = p + sizeof(au->reply_buf);
564
565 th = get_ticket_handler(ac, au->service);
566 if (!th)
567 return -EIO; /* hrm! */
568 ret = ceph_x_decrypt(&th->session_key, &p, end, &reply, sizeof(reply));
569 if (ret < 0)
570 return ret;
571 if (ret != sizeof(reply))
572 return -EPERM;
573
574 if (au->nonce + 1 != le64_to_cpu(reply.nonce_plus_one))
575 ret = -EPERM;
576 else
577 ret = 0;
578 dout("verify_authorizer_reply nonce %llx got %llx ret %d\n",
579 au->nonce, le64_to_cpu(reply.nonce_plus_one), ret);
580 return ret;
581}
582
583static void ceph_x_destroy_authorizer(struct ceph_auth_client *ac,
584 struct ceph_authorizer *a)
585{
586 struct ceph_x_authorizer *au = (void *)a;
587
588 ceph_buffer_put(au->buf);
589 kfree(au);
590}
591
592
593static void ceph_x_reset(struct ceph_auth_client *ac)
594{
595 struct ceph_x_info *xi = ac->private;
596
597 dout("reset\n");
598 xi->starting = true;
599 xi->server_challenge = 0;
600}
601
602static void ceph_x_destroy(struct ceph_auth_client *ac)
603{
604 struct ceph_x_info *xi = ac->private;
605 struct rb_node *p;
606
607 dout("ceph_x_destroy %p\n", ac);
608 ceph_crypto_key_destroy(&xi->secret);
609
610 while ((p = rb_first(&xi->ticket_handlers)) != NULL) {
611 struct ceph_x_ticket_handler *th =
612 rb_entry(p, struct ceph_x_ticket_handler, node);
613 remove_ticket_handler(ac, th);
614 }
615
Sage Weil22b1de02010-07-05 15:36:49 -0700616 if (xi->auth_authorizer.buf)
617 ceph_buffer_put(xi->auth_authorizer.buf);
618
Sage Weilec0994e2010-02-02 16:25:35 -0800619 kfree(ac->private);
620 ac->private = NULL;
621}
622
623static void ceph_x_invalidate_authorizer(struct ceph_auth_client *ac,
624 int peer_type)
625{
626 struct ceph_x_ticket_handler *th;
627
628 th = get_ticket_handler(ac, peer_type);
629 if (th && !IS_ERR(th))
630 remove_ticket_handler(ac, th);
631}
632
633
634static const struct ceph_auth_client_ops ceph_x_ops = {
Sage Weil559c1e02010-05-14 09:55:18 -0700635 .name = "x",
Sage Weilec0994e2010-02-02 16:25:35 -0800636 .is_authenticated = ceph_x_is_authenticated,
Sage Weila41359f2010-05-25 15:39:06 -0700637 .should_authenticate = ceph_x_should_authenticate,
Sage Weilec0994e2010-02-02 16:25:35 -0800638 .build_request = ceph_x_build_request,
639 .handle_reply = ceph_x_handle_reply,
640 .create_authorizer = ceph_x_create_authorizer,
641 .verify_authorizer_reply = ceph_x_verify_authorizer_reply,
642 .destroy_authorizer = ceph_x_destroy_authorizer,
643 .invalidate_authorizer = ceph_x_invalidate_authorizer,
644 .reset = ceph_x_reset,
645 .destroy = ceph_x_destroy,
646};
647
648
649int ceph_x_init(struct ceph_auth_client *ac)
650{
651 struct ceph_x_info *xi;
652 int ret;
653
654 dout("ceph_x_init %p\n", ac);
Sage Weilb0930f82010-04-29 13:26:53 -0700655 ret = -ENOMEM;
Sage Weilec0994e2010-02-02 16:25:35 -0800656 xi = kzalloc(sizeof(*xi), GFP_NOFS);
657 if (!xi)
Sage Weilb0930f82010-04-29 13:26:53 -0700658 goto out;
Sage Weilec0994e2010-02-02 16:25:35 -0800659
Sage Weilec0994e2010-02-02 16:25:35 -0800660 ret = -EINVAL;
661 if (!ac->secret) {
662 pr_err("no secret set (for auth_x protocol)\n");
Sage Weilb0930f82010-04-29 13:26:53 -0700663 goto out_nomem;
Sage Weilec0994e2010-02-02 16:25:35 -0800664 }
665
666 ret = ceph_crypto_key_unarmor(&xi->secret, ac->secret);
667 if (ret)
Sage Weilb0930f82010-04-29 13:26:53 -0700668 goto out_nomem;
Sage Weilec0994e2010-02-02 16:25:35 -0800669
670 xi->starting = true;
671 xi->ticket_handlers = RB_ROOT;
672
673 ac->protocol = CEPH_AUTH_CEPHX;
674 ac->private = xi;
675 ac->ops = &ceph_x_ops;
676 return 0;
677
Sage Weilb0930f82010-04-29 13:26:53 -0700678out_nomem:
Sage Weilec0994e2010-02-02 16:25:35 -0800679 kfree(xi);
Sage Weilb0930f82010-04-29 13:26:53 -0700680out:
Sage Weilec0994e2010-02-02 16:25:35 -0800681 return ret;
682}
683
684