Commit | Line | Data |
---|---|---|
ec0994e4 | 1 | |
3d14c5d2 | 2 | #include <linux/ceph/ceph_debug.h> |
ec0994e4 SW |
3 | |
4 | #include <linux/err.h> | |
5 | #include <linux/module.h> | |
6 | #include <linux/random.h> | |
5a0e3ad6 | 7 | #include <linux/slab.h> |
ec0994e4 | 8 | |
3d14c5d2 YS |
9 | #include <linux/ceph/decode.h> |
10 | #include <linux/ceph/auth.h> | |
11 | ||
12 | #include "crypto.h" | |
ec0994e4 SW |
13 | #include "auth_x.h" |
14 | #include "auth_x_protocol.h" | |
ec0994e4 | 15 | |
ec0994e4 SW |
16 | static void ceph_x_validate_tickets(struct ceph_auth_client *ac, int *pneed); |
17 | ||
18 | static int ceph_x_is_authenticated(struct ceph_auth_client *ac) | |
19 | { | |
20 | struct ceph_x_info *xi = ac->private; | |
21 | int need; | |
22 | ||
23 | ceph_x_validate_tickets(ac, &need); | |
24 | dout("ceph_x_is_authenticated want=%d need=%d have=%d\n", | |
25 | ac->want_keys, need, xi->have_keys); | |
26 | return (ac->want_keys & xi->have_keys) == ac->want_keys; | |
27 | } | |
28 | ||
a41359fa SW |
29 | static int ceph_x_should_authenticate(struct ceph_auth_client *ac) |
30 | { | |
31 | struct ceph_x_info *xi = ac->private; | |
32 | int need; | |
33 | ||
34 | ceph_x_validate_tickets(ac, &need); | |
35 | dout("ceph_x_should_authenticate want=%d need=%d have=%d\n", | |
36 | ac->want_keys, need, xi->have_keys); | |
37 | return need != 0; | |
38 | } | |
39 | ||
807c86e2 SW |
40 | static int ceph_x_encrypt_buflen(int ilen) |
41 | { | |
42 | return sizeof(struct ceph_x_encrypt_header) + ilen + 16 + | |
43 | sizeof(u32); | |
44 | } | |
45 | ||
ec0994e4 SW |
46 | static int ceph_x_encrypt(struct ceph_crypto_key *secret, |
47 | void *ibuf, int ilen, void *obuf, size_t olen) | |
48 | { | |
49 | struct ceph_x_encrypt_header head = { | |
50 | .struct_v = 1, | |
51 | .magic = cpu_to_le64(CEPHX_ENC_MAGIC) | |
52 | }; | |
53 | size_t len = olen - sizeof(u32); | |
54 | int ret; | |
55 | ||
56 | ret = ceph_encrypt2(secret, obuf + sizeof(u32), &len, | |
57 | &head, sizeof(head), ibuf, ilen); | |
58 | if (ret) | |
59 | return ret; | |
60 | ceph_encode_32(&obuf, len); | |
61 | return len + sizeof(u32); | |
62 | } | |
63 | ||
64 | static int ceph_x_decrypt(struct ceph_crypto_key *secret, | |
c27a3e4d | 65 | void **p, void *end, void **obuf, size_t olen) |
ec0994e4 SW |
66 | { |
67 | struct ceph_x_encrypt_header head; | |
68 | size_t head_len = sizeof(head); | |
69 | int len, ret; | |
70 | ||
71 | len = ceph_decode_32(p); | |
72 | if (*p + len > end) | |
73 | return -EINVAL; | |
74 | ||
75 | dout("ceph_x_decrypt len %d\n", len); | |
c27a3e4d ID |
76 | if (*obuf == NULL) { |
77 | *obuf = kmalloc(len, GFP_NOFS); | |
78 | if (!*obuf) | |
79 | return -ENOMEM; | |
80 | olen = len; | |
81 | } | |
82 | ||
83 | ret = ceph_decrypt2(secret, &head, &head_len, *obuf, &olen, *p, len); | |
ec0994e4 SW |
84 | if (ret) |
85 | return ret; | |
86 | if (head.struct_v != 1 || le64_to_cpu(head.magic) != CEPHX_ENC_MAGIC) | |
87 | return -EPERM; | |
88 | *p += len; | |
89 | return olen; | |
90 | } | |
91 | ||
92 | /* | |
93 | * get existing (or insert new) ticket handler | |
94 | */ | |
cd84db6e YS |
95 | static struct ceph_x_ticket_handler * |
96 | get_ticket_handler(struct ceph_auth_client *ac, int service) | |
ec0994e4 SW |
97 | { |
98 | struct ceph_x_ticket_handler *th; | |
99 | struct ceph_x_info *xi = ac->private; | |
100 | struct rb_node *parent = NULL, **p = &xi->ticket_handlers.rb_node; | |
101 | ||
102 | while (*p) { | |
103 | parent = *p; | |
104 | th = rb_entry(parent, struct ceph_x_ticket_handler, node); | |
105 | if (service < th->service) | |
106 | p = &(*p)->rb_left; | |
107 | else if (service > th->service) | |
108 | p = &(*p)->rb_right; | |
109 | else | |
110 | return th; | |
111 | } | |
112 | ||
113 | /* add it */ | |
114 | th = kzalloc(sizeof(*th), GFP_NOFS); | |
115 | if (!th) | |
116 | return ERR_PTR(-ENOMEM); | |
117 | th->service = service; | |
118 | rb_link_node(&th->node, parent, p); | |
119 | rb_insert_color(&th->node, &xi->ticket_handlers); | |
120 | return th; | |
121 | } | |
122 | ||
123 | static void remove_ticket_handler(struct ceph_auth_client *ac, | |
124 | struct ceph_x_ticket_handler *th) | |
125 | { | |
126 | struct ceph_x_info *xi = ac->private; | |
127 | ||
128 | dout("remove_ticket_handler %p %d\n", th, th->service); | |
129 | rb_erase(&th->node, &xi->ticket_handlers); | |
130 | ceph_crypto_key_destroy(&th->session_key); | |
131 | if (th->ticket_blob) | |
132 | ceph_buffer_put(th->ticket_blob); | |
133 | kfree(th); | |
134 | } | |
135 | ||
597cda35 ID |
136 | static int process_one_ticket(struct ceph_auth_client *ac, |
137 | struct ceph_crypto_key *secret, | |
c27a3e4d | 138 | void **p, void *end) |
597cda35 ID |
139 | { |
140 | struct ceph_x_info *xi = ac->private; | |
141 | int type; | |
142 | u8 tkt_struct_v, blob_struct_v; | |
143 | struct ceph_x_ticket_handler *th; | |
c27a3e4d | 144 | void *dbuf = NULL; |
597cda35 ID |
145 | void *dp, *dend; |
146 | int dlen; | |
147 | char is_enc; | |
148 | struct timespec validity; | |
149 | struct ceph_crypto_key old_key; | |
c27a3e4d | 150 | void *ticket_buf = NULL; |
597cda35 | 151 | void *tp, *tpend; |
e9226d7c | 152 | void **ptp; |
597cda35 ID |
153 | struct ceph_timespec new_validity; |
154 | struct ceph_crypto_key new_session_key; | |
155 | struct ceph_buffer *new_ticket_blob; | |
156 | unsigned long new_expires, new_renew_after; | |
157 | u64 new_secret_id; | |
158 | int ret; | |
159 | ||
160 | ceph_decode_need(p, end, sizeof(u32) + 1, bad); | |
161 | ||
162 | type = ceph_decode_32(p); | |
163 | dout(" ticket type %d %s\n", type, ceph_entity_type_name(type)); | |
164 | ||
165 | tkt_struct_v = ceph_decode_8(p); | |
166 | if (tkt_struct_v != 1) | |
167 | goto bad; | |
168 | ||
169 | th = get_ticket_handler(ac, type); | |
170 | if (IS_ERR(th)) { | |
171 | ret = PTR_ERR(th); | |
172 | goto out; | |
173 | } | |
174 | ||
175 | /* blob for me */ | |
c27a3e4d | 176 | dlen = ceph_x_decrypt(secret, p, end, &dbuf, 0); |
597cda35 ID |
177 | if (dlen <= 0) { |
178 | ret = dlen; | |
179 | goto out; | |
180 | } | |
181 | dout(" decrypted %d bytes\n", dlen); | |
182 | dp = dbuf; | |
183 | dend = dp + dlen; | |
184 | ||
185 | tkt_struct_v = ceph_decode_8(&dp); | |
186 | if (tkt_struct_v != 1) | |
187 | goto bad; | |
188 | ||
189 | memcpy(&old_key, &th->session_key, sizeof(old_key)); | |
190 | ret = ceph_crypto_key_decode(&new_session_key, &dp, dend); | |
191 | if (ret) | |
192 | goto out; | |
193 | ||
194 | ceph_decode_copy(&dp, &new_validity, sizeof(new_validity)); | |
195 | ceph_decode_timespec(&validity, &new_validity); | |
196 | new_expires = get_seconds() + validity.tv_sec; | |
197 | new_renew_after = new_expires - (validity.tv_sec / 4); | |
198 | dout(" expires=%lu renew_after=%lu\n", new_expires, | |
199 | new_renew_after); | |
200 | ||
201 | /* ticket blob for service */ | |
202 | ceph_decode_8_safe(p, end, is_enc, bad); | |
597cda35 ID |
203 | if (is_enc) { |
204 | /* encrypted */ | |
205 | dout(" encrypted ticket\n"); | |
c27a3e4d | 206 | dlen = ceph_x_decrypt(&old_key, p, end, &ticket_buf, 0); |
597cda35 ID |
207 | if (dlen < 0) { |
208 | ret = dlen; | |
209 | goto out; | |
210 | } | |
c27a3e4d | 211 | tp = ticket_buf; |
e9226d7c ID |
212 | ptp = &tp; |
213 | tpend = *ptp + dlen; | |
597cda35 ID |
214 | } else { |
215 | /* unencrypted */ | |
e9226d7c ID |
216 | ptp = p; |
217 | tpend = end; | |
597cda35 | 218 | } |
e9226d7c | 219 | ceph_decode_32_safe(ptp, tpend, dlen, bad); |
597cda35 | 220 | dout(" ticket blob is %d bytes\n", dlen); |
e9226d7c ID |
221 | ceph_decode_need(ptp, tpend, 1 + sizeof(u64), bad); |
222 | blob_struct_v = ceph_decode_8(ptp); | |
223 | new_secret_id = ceph_decode_64(ptp); | |
224 | ret = ceph_decode_buffer(&new_ticket_blob, ptp, tpend); | |
597cda35 ID |
225 | if (ret) |
226 | goto out; | |
227 | ||
228 | /* all is well, update our ticket */ | |
229 | ceph_crypto_key_destroy(&th->session_key); | |
230 | if (th->ticket_blob) | |
231 | ceph_buffer_put(th->ticket_blob); | |
232 | th->session_key = new_session_key; | |
233 | th->ticket_blob = new_ticket_blob; | |
234 | th->validity = new_validity; | |
235 | th->secret_id = new_secret_id; | |
236 | th->expires = new_expires; | |
237 | th->renew_after = new_renew_after; | |
238 | dout(" got ticket service %d (%s) secret_id %lld len %d\n", | |
239 | type, ceph_entity_type_name(type), th->secret_id, | |
240 | (int)th->ticket_blob->vec.iov_len); | |
241 | xi->have_keys |= th->service; | |
242 | ||
243 | out: | |
c27a3e4d ID |
244 | kfree(ticket_buf); |
245 | kfree(dbuf); | |
597cda35 ID |
246 | return ret; |
247 | ||
248 | bad: | |
249 | ret = -EINVAL; | |
250 | goto out; | |
251 | } | |
252 | ||
ec0994e4 SW |
253 | static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac, |
254 | struct ceph_crypto_key *secret, | |
255 | void *buf, void *end) | |
256 | { | |
ec0994e4 | 257 | void *p = buf; |
b736b3d9 | 258 | u8 reply_struct_v; |
597cda35 ID |
259 | u32 num; |
260 | int ret; | |
ec0994e4 | 261 | |
597cda35 | 262 | ceph_decode_8_safe(&p, end, reply_struct_v, bad); |
b736b3d9 | 263 | if (reply_struct_v != 1) |
597cda35 | 264 | return -EINVAL; |
ec0994e4 | 265 | |
597cda35 ID |
266 | ceph_decode_32_safe(&p, end, num, bad); |
267 | dout("%d tickets\n", num); | |
ec0994e4 | 268 | |
597cda35 | 269 | while (num--) { |
c27a3e4d | 270 | ret = process_one_ticket(ac, secret, &p, end); |
ec0994e4 | 271 | if (ret) |
c27a3e4d | 272 | return ret; |
ec0994e4 SW |
273 | } |
274 | ||
c27a3e4d | 275 | return 0; |
ec0994e4 SW |
276 | |
277 | bad: | |
c27a3e4d | 278 | return -EINVAL; |
ec0994e4 SW |
279 | } |
280 | ||
281 | static int ceph_x_build_authorizer(struct ceph_auth_client *ac, | |
282 | struct ceph_x_ticket_handler *th, | |
283 | struct ceph_x_authorizer *au) | |
284 | { | |
807c86e2 | 285 | int maxlen; |
ec0994e4 SW |
286 | struct ceph_x_authorize_a *msg_a; |
287 | struct ceph_x_authorize_b msg_b; | |
288 | void *p, *end; | |
289 | int ret; | |
290 | int ticket_blob_len = | |
291 | (th->ticket_blob ? th->ticket_blob->vec.iov_len : 0); | |
292 | ||
293 | dout("build_authorizer for %s %p\n", | |
294 | ceph_entity_type_name(th->service), au); | |
295 | ||
ae385eaf YZ |
296 | ceph_crypto_key_destroy(&au->session_key); |
297 | ret = ceph_crypto_key_clone(&au->session_key, &th->session_key); | |
298 | if (ret) | |
299 | return ret; | |
300 | ||
807c86e2 SW |
301 | maxlen = sizeof(*msg_a) + sizeof(msg_b) + |
302 | ceph_x_encrypt_buflen(ticket_blob_len); | |
303 | dout(" need len %d\n", maxlen); | |
304 | if (au->buf && au->buf->alloc_len < maxlen) { | |
ec0994e4 SW |
305 | ceph_buffer_put(au->buf); |
306 | au->buf = NULL; | |
307 | } | |
308 | if (!au->buf) { | |
807c86e2 | 309 | au->buf = ceph_buffer_new(maxlen, GFP_NOFS); |
ae385eaf YZ |
310 | if (!au->buf) { |
311 | ceph_crypto_key_destroy(&au->session_key); | |
ec0994e4 | 312 | return -ENOMEM; |
ae385eaf | 313 | } |
ec0994e4 SW |
314 | } |
315 | au->service = th->service; | |
0bed9b5c | 316 | au->secret_id = th->secret_id; |
ec0994e4 SW |
317 | |
318 | msg_a = au->buf->vec.iov_base; | |
319 | msg_a->struct_v = 1; | |
320 | msg_a->global_id = cpu_to_le64(ac->global_id); | |
321 | msg_a->service_id = cpu_to_le32(th->service); | |
322 | msg_a->ticket_blob.struct_v = 1; | |
323 | msg_a->ticket_blob.secret_id = cpu_to_le64(th->secret_id); | |
324 | msg_a->ticket_blob.blob_len = cpu_to_le32(ticket_blob_len); | |
325 | if (ticket_blob_len) { | |
326 | memcpy(msg_a->ticket_blob.blob, th->ticket_blob->vec.iov_base, | |
327 | th->ticket_blob->vec.iov_len); | |
328 | } | |
329 | dout(" th %p secret_id %lld %lld\n", th, th->secret_id, | |
330 | le64_to_cpu(msg_a->ticket_blob.secret_id)); | |
331 | ||
332 | p = msg_a + 1; | |
333 | p += ticket_blob_len; | |
334 | end = au->buf->vec.iov_base + au->buf->vec.iov_len; | |
335 | ||
336 | get_random_bytes(&au->nonce, sizeof(au->nonce)); | |
337 | msg_b.struct_v = 1; | |
338 | msg_b.nonce = cpu_to_le64(au->nonce); | |
ae385eaf | 339 | ret = ceph_x_encrypt(&au->session_key, &msg_b, sizeof(msg_b), |
ec0994e4 SW |
340 | p, end - p); |
341 | if (ret < 0) | |
342 | goto out_buf; | |
343 | p += ret; | |
344 | au->buf->vec.iov_len = p - au->buf->vec.iov_base; | |
345 | dout(" built authorizer nonce %llx len %d\n", au->nonce, | |
346 | (int)au->buf->vec.iov_len); | |
807c86e2 | 347 | BUG_ON(au->buf->vec.iov_len > maxlen); |
ec0994e4 SW |
348 | return 0; |
349 | ||
350 | out_buf: | |
351 | ceph_buffer_put(au->buf); | |
352 | au->buf = NULL; | |
353 | return ret; | |
354 | } | |
355 | ||
356 | static int ceph_x_encode_ticket(struct ceph_x_ticket_handler *th, | |
357 | void **p, void *end) | |
358 | { | |
359 | ceph_decode_need(p, end, 1 + sizeof(u64), bad); | |
360 | ceph_encode_8(p, 1); | |
361 | ceph_encode_64(p, th->secret_id); | |
362 | if (th->ticket_blob) { | |
363 | const char *buf = th->ticket_blob->vec.iov_base; | |
364 | u32 len = th->ticket_blob->vec.iov_len; | |
365 | ||
366 | ceph_encode_32_safe(p, end, len, bad); | |
367 | ceph_encode_copy_safe(p, end, buf, len, bad); | |
368 | } else { | |
369 | ceph_encode_32_safe(p, end, 0, bad); | |
370 | } | |
371 | ||
372 | return 0; | |
373 | bad: | |
374 | return -ERANGE; | |
375 | } | |
376 | ||
377 | static void ceph_x_validate_tickets(struct ceph_auth_client *ac, int *pneed) | |
378 | { | |
379 | int want = ac->want_keys; | |
380 | struct ceph_x_info *xi = ac->private; | |
381 | int service; | |
382 | ||
383 | *pneed = ac->want_keys & ~(xi->have_keys); | |
384 | ||
385 | for (service = 1; service <= want; service <<= 1) { | |
386 | struct ceph_x_ticket_handler *th; | |
387 | ||
388 | if (!(ac->want_keys & service)) | |
389 | continue; | |
390 | ||
391 | if (*pneed & service) | |
392 | continue; | |
393 | ||
394 | th = get_ticket_handler(ac, service); | |
395 | ||
b545787d | 396 | if (IS_ERR(th)) { |
ec0994e4 SW |
397 | *pneed |= service; |
398 | continue; | |
399 | } | |
400 | ||
401 | if (get_seconds() >= th->renew_after) | |
402 | *pneed |= service; | |
403 | if (get_seconds() >= th->expires) | |
404 | xi->have_keys &= ~service; | |
405 | } | |
406 | } | |
407 | ||
408 | ||
409 | static int ceph_x_build_request(struct ceph_auth_client *ac, | |
410 | void *buf, void *end) | |
411 | { | |
412 | struct ceph_x_info *xi = ac->private; | |
413 | int need; | |
414 | struct ceph_x_request_header *head = buf; | |
415 | int ret; | |
416 | struct ceph_x_ticket_handler *th = | |
417 | get_ticket_handler(ac, CEPH_ENTITY_TYPE_AUTH); | |
418 | ||
b545787d DC |
419 | if (IS_ERR(th)) |
420 | return PTR_ERR(th); | |
421 | ||
ec0994e4 SW |
422 | ceph_x_validate_tickets(ac, &need); |
423 | ||
424 | dout("build_request want %x have %x need %x\n", | |
425 | ac->want_keys, xi->have_keys, need); | |
426 | ||
427 | if (need & CEPH_ENTITY_TYPE_AUTH) { | |
428 | struct ceph_x_authenticate *auth = (void *)(head + 1); | |
429 | void *p = auth + 1; | |
430 | struct ceph_x_challenge_blob tmp; | |
431 | char tmp_enc[40]; | |
432 | u64 *u; | |
433 | ||
434 | if (p > end) | |
435 | return -ERANGE; | |
436 | ||
437 | dout(" get_auth_session_key\n"); | |
438 | head->op = cpu_to_le16(CEPHX_GET_AUTH_SESSION_KEY); | |
439 | ||
440 | /* encrypt and hash */ | |
441 | get_random_bytes(&auth->client_challenge, sizeof(u64)); | |
442 | tmp.client_challenge = auth->client_challenge; | |
443 | tmp.server_challenge = cpu_to_le64(xi->server_challenge); | |
444 | ret = ceph_x_encrypt(&xi->secret, &tmp, sizeof(tmp), | |
445 | tmp_enc, sizeof(tmp_enc)); | |
446 | if (ret < 0) | |
447 | return ret; | |
448 | ||
449 | auth->struct_v = 1; | |
450 | auth->key = 0; | |
451 | for (u = (u64 *)tmp_enc; u + 1 <= (u64 *)(tmp_enc + ret); u++) | |
cd84db6e | 452 | auth->key ^= *(__le64 *)u; |
ec0994e4 SW |
453 | dout(" server_challenge %llx client_challenge %llx key %llx\n", |
454 | xi->server_challenge, le64_to_cpu(auth->client_challenge), | |
455 | le64_to_cpu(auth->key)); | |
456 | ||
457 | /* now encode the old ticket if exists */ | |
458 | ret = ceph_x_encode_ticket(th, &p, end); | |
459 | if (ret < 0) | |
460 | return ret; | |
461 | ||
462 | return p - buf; | |
463 | } | |
464 | ||
465 | if (need) { | |
466 | void *p = head + 1; | |
467 | struct ceph_x_service_ticket_request *req; | |
468 | ||
469 | if (p > end) | |
470 | return -ERANGE; | |
471 | head->op = cpu_to_le16(CEPHX_GET_PRINCIPAL_SESSION_KEY); | |
472 | ||
ec0994e4 SW |
473 | ret = ceph_x_build_authorizer(ac, th, &xi->auth_authorizer); |
474 | if (ret) | |
475 | return ret; | |
476 | ceph_encode_copy(&p, xi->auth_authorizer.buf->vec.iov_base, | |
477 | xi->auth_authorizer.buf->vec.iov_len); | |
478 | ||
479 | req = p; | |
480 | req->keys = cpu_to_le32(need); | |
481 | p += sizeof(*req); | |
482 | return p - buf; | |
483 | } | |
484 | ||
485 | return 0; | |
486 | } | |
487 | ||
488 | static int ceph_x_handle_reply(struct ceph_auth_client *ac, int result, | |
489 | void *buf, void *end) | |
490 | { | |
491 | struct ceph_x_info *xi = ac->private; | |
492 | struct ceph_x_reply_header *head = buf; | |
493 | struct ceph_x_ticket_handler *th; | |
494 | int len = end - buf; | |
495 | int op; | |
496 | int ret; | |
497 | ||
498 | if (result) | |
499 | return result; /* XXX hmm? */ | |
500 | ||
501 | if (xi->starting) { | |
502 | /* it's a hello */ | |
503 | struct ceph_x_server_challenge *sc = buf; | |
504 | ||
505 | if (len != sizeof(*sc)) | |
506 | return -EINVAL; | |
507 | xi->server_challenge = le64_to_cpu(sc->server_challenge); | |
508 | dout("handle_reply got server challenge %llx\n", | |
509 | xi->server_challenge); | |
510 | xi->starting = false; | |
511 | xi->have_keys &= ~CEPH_ENTITY_TYPE_AUTH; | |
512 | return -EAGAIN; | |
513 | } | |
514 | ||
0cf5537b | 515 | op = le16_to_cpu(head->op); |
ec0994e4 SW |
516 | result = le32_to_cpu(head->result); |
517 | dout("handle_reply op %d result %d\n", op, result); | |
518 | switch (op) { | |
519 | case CEPHX_GET_AUTH_SESSION_KEY: | |
520 | /* verify auth key */ | |
521 | ret = ceph_x_proc_ticket_reply(ac, &xi->secret, | |
522 | buf + sizeof(*head), end); | |
523 | break; | |
524 | ||
525 | case CEPHX_GET_PRINCIPAL_SESSION_KEY: | |
526 | th = get_ticket_handler(ac, CEPH_ENTITY_TYPE_AUTH); | |
b545787d DC |
527 | if (IS_ERR(th)) |
528 | return PTR_ERR(th); | |
ec0994e4 SW |
529 | ret = ceph_x_proc_ticket_reply(ac, &th->session_key, |
530 | buf + sizeof(*head), end); | |
531 | break; | |
532 | ||
533 | default: | |
534 | return -EINVAL; | |
535 | } | |
536 | if (ret) | |
537 | return ret; | |
538 | if (ac->want_keys == xi->have_keys) | |
539 | return 0; | |
540 | return -EAGAIN; | |
541 | } | |
542 | ||
543 | static int ceph_x_create_authorizer( | |
544 | struct ceph_auth_client *ac, int peer_type, | |
74f1869f | 545 | struct ceph_auth_handshake *auth) |
ec0994e4 SW |
546 | { |
547 | struct ceph_x_authorizer *au; | |
548 | struct ceph_x_ticket_handler *th; | |
549 | int ret; | |
550 | ||
551 | th = get_ticket_handler(ac, peer_type); | |
552 | if (IS_ERR(th)) | |
553 | return PTR_ERR(th); | |
554 | ||
555 | au = kzalloc(sizeof(*au), GFP_NOFS); | |
556 | if (!au) | |
557 | return -ENOMEM; | |
558 | ||
559 | ret = ceph_x_build_authorizer(ac, th, au); | |
560 | if (ret) { | |
561 | kfree(au); | |
562 | return ret; | |
563 | } | |
564 | ||
74f1869f AE |
565 | auth->authorizer = (struct ceph_authorizer *) au; |
566 | auth->authorizer_buf = au->buf->vec.iov_base; | |
567 | auth->authorizer_buf_len = au->buf->vec.iov_len; | |
568 | auth->authorizer_reply_buf = au->reply_buf; | |
569 | auth->authorizer_reply_buf_len = sizeof (au->reply_buf); | |
570 | ||
ec0994e4 SW |
571 | return 0; |
572 | } | |
573 | ||
0bed9b5c SW |
574 | static int ceph_x_update_authorizer( |
575 | struct ceph_auth_client *ac, int peer_type, | |
576 | struct ceph_auth_handshake *auth) | |
577 | { | |
578 | struct ceph_x_authorizer *au; | |
579 | struct ceph_x_ticket_handler *th; | |
0bed9b5c SW |
580 | |
581 | th = get_ticket_handler(ac, peer_type); | |
582 | if (IS_ERR(th)) | |
583 | return PTR_ERR(th); | |
584 | ||
585 | au = (struct ceph_x_authorizer *)auth->authorizer; | |
586 | if (au->secret_id < th->secret_id) { | |
587 | dout("ceph_x_update_authorizer service %u secret %llu < %llu\n", | |
588 | au->service, au->secret_id, th->secret_id); | |
589 | return ceph_x_build_authorizer(ac, th, au); | |
590 | } | |
591 | return 0; | |
592 | } | |
593 | ||
ec0994e4 SW |
594 | static int ceph_x_verify_authorizer_reply(struct ceph_auth_client *ac, |
595 | struct ceph_authorizer *a, size_t len) | |
596 | { | |
597 | struct ceph_x_authorizer *au = (void *)a; | |
ec0994e4 SW |
598 | int ret = 0; |
599 | struct ceph_x_authorize_reply reply; | |
c27a3e4d | 600 | void *preply = &reply; |
ec0994e4 SW |
601 | void *p = au->reply_buf; |
602 | void *end = p + sizeof(au->reply_buf); | |
603 | ||
ae385eaf | 604 | ret = ceph_x_decrypt(&au->session_key, &p, end, &preply, sizeof(reply)); |
ec0994e4 SW |
605 | if (ret < 0) |
606 | return ret; | |
607 | if (ret != sizeof(reply)) | |
608 | return -EPERM; | |
609 | ||
610 | if (au->nonce + 1 != le64_to_cpu(reply.nonce_plus_one)) | |
611 | ret = -EPERM; | |
612 | else | |
613 | ret = 0; | |
614 | dout("verify_authorizer_reply nonce %llx got %llx ret %d\n", | |
615 | au->nonce, le64_to_cpu(reply.nonce_plus_one), ret); | |
616 | return ret; | |
617 | } | |
618 | ||
619 | static void ceph_x_destroy_authorizer(struct ceph_auth_client *ac, | |
620 | struct ceph_authorizer *a) | |
621 | { | |
622 | struct ceph_x_authorizer *au = (void *)a; | |
623 | ||
ae385eaf | 624 | ceph_crypto_key_destroy(&au->session_key); |
ec0994e4 SW |
625 | ceph_buffer_put(au->buf); |
626 | kfree(au); | |
627 | } | |
628 | ||
629 | ||
630 | static void ceph_x_reset(struct ceph_auth_client *ac) | |
631 | { | |
632 | struct ceph_x_info *xi = ac->private; | |
633 | ||
634 | dout("reset\n"); | |
635 | xi->starting = true; | |
636 | xi->server_challenge = 0; | |
637 | } | |
638 | ||
639 | static void ceph_x_destroy(struct ceph_auth_client *ac) | |
640 | { | |
641 | struct ceph_x_info *xi = ac->private; | |
642 | struct rb_node *p; | |
643 | ||
644 | dout("ceph_x_destroy %p\n", ac); | |
645 | ceph_crypto_key_destroy(&xi->secret); | |
646 | ||
647 | while ((p = rb_first(&xi->ticket_handlers)) != NULL) { | |
648 | struct ceph_x_ticket_handler *th = | |
649 | rb_entry(p, struct ceph_x_ticket_handler, node); | |
650 | remove_ticket_handler(ac, th); | |
651 | } | |
652 | ||
22b1de06 SW |
653 | if (xi->auth_authorizer.buf) |
654 | ceph_buffer_put(xi->auth_authorizer.buf); | |
655 | ||
ec0994e4 SW |
656 | kfree(ac->private); |
657 | ac->private = NULL; | |
658 | } | |
659 | ||
660 | static void ceph_x_invalidate_authorizer(struct ceph_auth_client *ac, | |
661 | int peer_type) | |
662 | { | |
663 | struct ceph_x_ticket_handler *th; | |
664 | ||
665 | th = get_ticket_handler(ac, peer_type); | |
b545787d | 666 | if (!IS_ERR(th)) |
4b8e8b5d | 667 | memset(&th->validity, 0, sizeof(th->validity)); |
ec0994e4 SW |
668 | } |
669 | ||
670 | ||
671 | static const struct ceph_auth_client_ops ceph_x_ops = { | |
559c1e00 | 672 | .name = "x", |
ec0994e4 | 673 | .is_authenticated = ceph_x_is_authenticated, |
a41359fa | 674 | .should_authenticate = ceph_x_should_authenticate, |
ec0994e4 SW |
675 | .build_request = ceph_x_build_request, |
676 | .handle_reply = ceph_x_handle_reply, | |
677 | .create_authorizer = ceph_x_create_authorizer, | |
0bed9b5c | 678 | .update_authorizer = ceph_x_update_authorizer, |
ec0994e4 SW |
679 | .verify_authorizer_reply = ceph_x_verify_authorizer_reply, |
680 | .destroy_authorizer = ceph_x_destroy_authorizer, | |
681 | .invalidate_authorizer = ceph_x_invalidate_authorizer, | |
682 | .reset = ceph_x_reset, | |
683 | .destroy = ceph_x_destroy, | |
684 | }; | |
685 | ||
686 | ||
687 | int ceph_x_init(struct ceph_auth_client *ac) | |
688 | { | |
689 | struct ceph_x_info *xi; | |
690 | int ret; | |
691 | ||
692 | dout("ceph_x_init %p\n", ac); | |
b0930f8d | 693 | ret = -ENOMEM; |
ec0994e4 SW |
694 | xi = kzalloc(sizeof(*xi), GFP_NOFS); |
695 | if (!xi) | |
b0930f8d | 696 | goto out; |
ec0994e4 | 697 | |
ec0994e4 | 698 | ret = -EINVAL; |
8323c3aa | 699 | if (!ac->key) { |
ec0994e4 | 700 | pr_err("no secret set (for auth_x protocol)\n"); |
b0930f8d | 701 | goto out_nomem; |
ec0994e4 SW |
702 | } |
703 | ||
8323c3aa TV |
704 | ret = ceph_crypto_key_clone(&xi->secret, ac->key); |
705 | if (ret < 0) { | |
706 | pr_err("cannot clone key: %d\n", ret); | |
b0930f8d | 707 | goto out_nomem; |
8323c3aa | 708 | } |
ec0994e4 SW |
709 | |
710 | xi->starting = true; | |
711 | xi->ticket_handlers = RB_ROOT; | |
712 | ||
713 | ac->protocol = CEPH_AUTH_CEPHX; | |
714 | ac->private = xi; | |
715 | ac->ops = &ceph_x_ops; | |
716 | return 0; | |
717 | ||
b0930f8d | 718 | out_nomem: |
ec0994e4 | 719 | kfree(xi); |
b0930f8d | 720 | out: |
ec0994e4 SW |
721 | return ret; |
722 | } | |
723 | ||
724 |