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 ID |
151 | void *tp, *tpend; |
152 | struct ceph_timespec new_validity; | |
153 | struct ceph_crypto_key new_session_key; | |
154 | struct ceph_buffer *new_ticket_blob; | |
155 | unsigned long new_expires, new_renew_after; | |
156 | u64 new_secret_id; | |
157 | int ret; | |
158 | ||
159 | ceph_decode_need(p, end, sizeof(u32) + 1, bad); | |
160 | ||
161 | type = ceph_decode_32(p); | |
162 | dout(" ticket type %d %s\n", type, ceph_entity_type_name(type)); | |
163 | ||
164 | tkt_struct_v = ceph_decode_8(p); | |
165 | if (tkt_struct_v != 1) | |
166 | goto bad; | |
167 | ||
168 | th = get_ticket_handler(ac, type); | |
169 | if (IS_ERR(th)) { | |
170 | ret = PTR_ERR(th); | |
171 | goto out; | |
172 | } | |
173 | ||
174 | /* blob for me */ | |
c27a3e4d | 175 | dlen = ceph_x_decrypt(secret, p, end, &dbuf, 0); |
597cda35 ID |
176 | if (dlen <= 0) { |
177 | ret = dlen; | |
178 | goto out; | |
179 | } | |
180 | dout(" decrypted %d bytes\n", dlen); | |
181 | dp = dbuf; | |
182 | dend = dp + dlen; | |
183 | ||
184 | tkt_struct_v = ceph_decode_8(&dp); | |
185 | if (tkt_struct_v != 1) | |
186 | goto bad; | |
187 | ||
188 | memcpy(&old_key, &th->session_key, sizeof(old_key)); | |
189 | ret = ceph_crypto_key_decode(&new_session_key, &dp, dend); | |
190 | if (ret) | |
191 | goto out; | |
192 | ||
193 | ceph_decode_copy(&dp, &new_validity, sizeof(new_validity)); | |
194 | ceph_decode_timespec(&validity, &new_validity); | |
195 | new_expires = get_seconds() + validity.tv_sec; | |
196 | new_renew_after = new_expires - (validity.tv_sec / 4); | |
197 | dout(" expires=%lu renew_after=%lu\n", new_expires, | |
198 | new_renew_after); | |
199 | ||
200 | /* ticket blob for service */ | |
201 | ceph_decode_8_safe(p, end, is_enc, bad); | |
597cda35 ID |
202 | if (is_enc) { |
203 | /* encrypted */ | |
204 | dout(" encrypted ticket\n"); | |
c27a3e4d | 205 | dlen = ceph_x_decrypt(&old_key, p, end, &ticket_buf, 0); |
597cda35 ID |
206 | if (dlen < 0) { |
207 | ret = dlen; | |
208 | goto out; | |
209 | } | |
c27a3e4d | 210 | tp = ticket_buf; |
597cda35 ID |
211 | dlen = ceph_decode_32(&tp); |
212 | } else { | |
213 | /* unencrypted */ | |
214 | ceph_decode_32_safe(p, end, dlen, bad); | |
c27a3e4d ID |
215 | ticket_buf = kmalloc(dlen, GFP_NOFS); |
216 | if (!ticket_buf) { | |
217 | ret = -ENOMEM; | |
218 | goto out; | |
219 | } | |
220 | tp = ticket_buf; | |
597cda35 ID |
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 | blob_struct_v = ceph_decode_8(&tp); | |
228 | new_secret_id = ceph_decode_64(&tp); | |
229 | ret = ceph_decode_buffer(&new_ticket_blob, &tp, tpend); | |
230 | if (ret) | |
231 | goto out; | |
232 | ||
233 | /* all is well, update our ticket */ | |
234 | ceph_crypto_key_destroy(&th->session_key); | |
235 | if (th->ticket_blob) | |
236 | ceph_buffer_put(th->ticket_blob); | |
237 | th->session_key = new_session_key; | |
238 | th->ticket_blob = new_ticket_blob; | |
239 | th->validity = new_validity; | |
240 | th->secret_id = new_secret_id; | |
241 | th->expires = new_expires; | |
242 | th->renew_after = new_renew_after; | |
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 | out: | |
c27a3e4d ID |
249 | kfree(ticket_buf); |
250 | kfree(dbuf); | |
597cda35 ID |
251 | return ret; |
252 | ||
253 | bad: | |
254 | ret = -EINVAL; | |
255 | goto out; | |
256 | } | |
257 | ||
ec0994e4 SW |
258 | static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac, |
259 | struct ceph_crypto_key *secret, | |
260 | void *buf, void *end) | |
261 | { | |
ec0994e4 | 262 | void *p = buf; |
b736b3d9 | 263 | u8 reply_struct_v; |
597cda35 ID |
264 | u32 num; |
265 | int ret; | |
ec0994e4 | 266 | |
597cda35 | 267 | ceph_decode_8_safe(&p, end, reply_struct_v, bad); |
b736b3d9 | 268 | if (reply_struct_v != 1) |
597cda35 | 269 | return -EINVAL; |
ec0994e4 | 270 | |
597cda35 ID |
271 | ceph_decode_32_safe(&p, end, num, bad); |
272 | dout("%d tickets\n", num); | |
ec0994e4 | 273 | |
597cda35 | 274 | while (num--) { |
c27a3e4d | 275 | ret = process_one_ticket(ac, secret, &p, end); |
ec0994e4 | 276 | if (ret) |
c27a3e4d | 277 | return ret; |
ec0994e4 SW |
278 | } |
279 | ||
c27a3e4d | 280 | return 0; |
ec0994e4 SW |
281 | |
282 | bad: | |
c27a3e4d | 283 | return -EINVAL; |
ec0994e4 SW |
284 | } |
285 | ||
286 | static int ceph_x_build_authorizer(struct ceph_auth_client *ac, | |
287 | struct ceph_x_ticket_handler *th, | |
288 | struct ceph_x_authorizer *au) | |
289 | { | |
807c86e2 | 290 | int maxlen; |
ec0994e4 SW |
291 | struct ceph_x_authorize_a *msg_a; |
292 | struct ceph_x_authorize_b msg_b; | |
293 | void *p, *end; | |
294 | int ret; | |
295 | int ticket_blob_len = | |
296 | (th->ticket_blob ? th->ticket_blob->vec.iov_len : 0); | |
297 | ||
298 | dout("build_authorizer for %s %p\n", | |
299 | ceph_entity_type_name(th->service), au); | |
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); |
ec0994e4 SW |
310 | if (!au->buf) |
311 | return -ENOMEM; | |
312 | } | |
313 | au->service = th->service; | |
0bed9b5c | 314 | au->secret_id = th->secret_id; |
ec0994e4 SW |
315 | |
316 | msg_a = au->buf->vec.iov_base; | |
317 | msg_a->struct_v = 1; | |
318 | msg_a->global_id = cpu_to_le64(ac->global_id); | |
319 | msg_a->service_id = cpu_to_le32(th->service); | |
320 | msg_a->ticket_blob.struct_v = 1; | |
321 | msg_a->ticket_blob.secret_id = cpu_to_le64(th->secret_id); | |
322 | msg_a->ticket_blob.blob_len = cpu_to_le32(ticket_blob_len); | |
323 | if (ticket_blob_len) { | |
324 | memcpy(msg_a->ticket_blob.blob, th->ticket_blob->vec.iov_base, | |
325 | th->ticket_blob->vec.iov_len); | |
326 | } | |
327 | dout(" th %p secret_id %lld %lld\n", th, th->secret_id, | |
328 | le64_to_cpu(msg_a->ticket_blob.secret_id)); | |
329 | ||
330 | p = msg_a + 1; | |
331 | p += ticket_blob_len; | |
332 | end = au->buf->vec.iov_base + au->buf->vec.iov_len; | |
333 | ||
334 | get_random_bytes(&au->nonce, sizeof(au->nonce)); | |
335 | msg_b.struct_v = 1; | |
336 | msg_b.nonce = cpu_to_le64(au->nonce); | |
337 | ret = ceph_x_encrypt(&th->session_key, &msg_b, sizeof(msg_b), | |
338 | p, end - p); | |
339 | if (ret < 0) | |
340 | goto out_buf; | |
341 | p += ret; | |
342 | au->buf->vec.iov_len = p - au->buf->vec.iov_base; | |
343 | dout(" built authorizer nonce %llx len %d\n", au->nonce, | |
344 | (int)au->buf->vec.iov_len); | |
807c86e2 | 345 | BUG_ON(au->buf->vec.iov_len > maxlen); |
ec0994e4 SW |
346 | return 0; |
347 | ||
348 | out_buf: | |
349 | ceph_buffer_put(au->buf); | |
350 | au->buf = NULL; | |
351 | return ret; | |
352 | } | |
353 | ||
354 | static int ceph_x_encode_ticket(struct ceph_x_ticket_handler *th, | |
355 | void **p, void *end) | |
356 | { | |
357 | ceph_decode_need(p, end, 1 + sizeof(u64), bad); | |
358 | ceph_encode_8(p, 1); | |
359 | ceph_encode_64(p, th->secret_id); | |
360 | if (th->ticket_blob) { | |
361 | const char *buf = th->ticket_blob->vec.iov_base; | |
362 | u32 len = th->ticket_blob->vec.iov_len; | |
363 | ||
364 | ceph_encode_32_safe(p, end, len, bad); | |
365 | ceph_encode_copy_safe(p, end, buf, len, bad); | |
366 | } else { | |
367 | ceph_encode_32_safe(p, end, 0, bad); | |
368 | } | |
369 | ||
370 | return 0; | |
371 | bad: | |
372 | return -ERANGE; | |
373 | } | |
374 | ||
375 | static void ceph_x_validate_tickets(struct ceph_auth_client *ac, int *pneed) | |
376 | { | |
377 | int want = ac->want_keys; | |
378 | struct ceph_x_info *xi = ac->private; | |
379 | int service; | |
380 | ||
381 | *pneed = ac->want_keys & ~(xi->have_keys); | |
382 | ||
383 | for (service = 1; service <= want; service <<= 1) { | |
384 | struct ceph_x_ticket_handler *th; | |
385 | ||
386 | if (!(ac->want_keys & service)) | |
387 | continue; | |
388 | ||
389 | if (*pneed & service) | |
390 | continue; | |
391 | ||
392 | th = get_ticket_handler(ac, service); | |
393 | ||
b545787d | 394 | if (IS_ERR(th)) { |
ec0994e4 SW |
395 | *pneed |= service; |
396 | continue; | |
397 | } | |
398 | ||
399 | if (get_seconds() >= th->renew_after) | |
400 | *pneed |= service; | |
401 | if (get_seconds() >= th->expires) | |
402 | xi->have_keys &= ~service; | |
403 | } | |
404 | } | |
405 | ||
406 | ||
407 | static int ceph_x_build_request(struct ceph_auth_client *ac, | |
408 | void *buf, void *end) | |
409 | { | |
410 | struct ceph_x_info *xi = ac->private; | |
411 | int need; | |
412 | struct ceph_x_request_header *head = buf; | |
413 | int ret; | |
414 | struct ceph_x_ticket_handler *th = | |
415 | get_ticket_handler(ac, CEPH_ENTITY_TYPE_AUTH); | |
416 | ||
b545787d DC |
417 | if (IS_ERR(th)) |
418 | return PTR_ERR(th); | |
419 | ||
ec0994e4 SW |
420 | ceph_x_validate_tickets(ac, &need); |
421 | ||
422 | dout("build_request want %x have %x need %x\n", | |
423 | ac->want_keys, xi->have_keys, need); | |
424 | ||
425 | if (need & CEPH_ENTITY_TYPE_AUTH) { | |
426 | struct ceph_x_authenticate *auth = (void *)(head + 1); | |
427 | void *p = auth + 1; | |
428 | struct ceph_x_challenge_blob tmp; | |
429 | char tmp_enc[40]; | |
430 | u64 *u; | |
431 | ||
432 | if (p > end) | |
433 | return -ERANGE; | |
434 | ||
435 | dout(" get_auth_session_key\n"); | |
436 | head->op = cpu_to_le16(CEPHX_GET_AUTH_SESSION_KEY); | |
437 | ||
438 | /* encrypt and hash */ | |
439 | get_random_bytes(&auth->client_challenge, sizeof(u64)); | |
440 | tmp.client_challenge = auth->client_challenge; | |
441 | tmp.server_challenge = cpu_to_le64(xi->server_challenge); | |
442 | ret = ceph_x_encrypt(&xi->secret, &tmp, sizeof(tmp), | |
443 | tmp_enc, sizeof(tmp_enc)); | |
444 | if (ret < 0) | |
445 | return ret; | |
446 | ||
447 | auth->struct_v = 1; | |
448 | auth->key = 0; | |
449 | for (u = (u64 *)tmp_enc; u + 1 <= (u64 *)(tmp_enc + ret); u++) | |
cd84db6e | 450 | auth->key ^= *(__le64 *)u; |
ec0994e4 SW |
451 | dout(" server_challenge %llx client_challenge %llx key %llx\n", |
452 | xi->server_challenge, le64_to_cpu(auth->client_challenge), | |
453 | le64_to_cpu(auth->key)); | |
454 | ||
455 | /* now encode the old ticket if exists */ | |
456 | ret = ceph_x_encode_ticket(th, &p, end); | |
457 | if (ret < 0) | |
458 | return ret; | |
459 | ||
460 | return p - buf; | |
461 | } | |
462 | ||
463 | if (need) { | |
464 | void *p = head + 1; | |
465 | struct ceph_x_service_ticket_request *req; | |
466 | ||
467 | if (p > end) | |
468 | return -ERANGE; | |
469 | head->op = cpu_to_le16(CEPHX_GET_PRINCIPAL_SESSION_KEY); | |
470 | ||
ec0994e4 SW |
471 | ret = ceph_x_build_authorizer(ac, th, &xi->auth_authorizer); |
472 | if (ret) | |
473 | return ret; | |
474 | ceph_encode_copy(&p, xi->auth_authorizer.buf->vec.iov_base, | |
475 | xi->auth_authorizer.buf->vec.iov_len); | |
476 | ||
477 | req = p; | |
478 | req->keys = cpu_to_le32(need); | |
479 | p += sizeof(*req); | |
480 | return p - buf; | |
481 | } | |
482 | ||
483 | return 0; | |
484 | } | |
485 | ||
486 | static int ceph_x_handle_reply(struct ceph_auth_client *ac, int result, | |
487 | void *buf, void *end) | |
488 | { | |
489 | struct ceph_x_info *xi = ac->private; | |
490 | struct ceph_x_reply_header *head = buf; | |
491 | struct ceph_x_ticket_handler *th; | |
492 | int len = end - buf; | |
493 | int op; | |
494 | int ret; | |
495 | ||
496 | if (result) | |
497 | return result; /* XXX hmm? */ | |
498 | ||
499 | if (xi->starting) { | |
500 | /* it's a hello */ | |
501 | struct ceph_x_server_challenge *sc = buf; | |
502 | ||
503 | if (len != sizeof(*sc)) | |
504 | return -EINVAL; | |
505 | xi->server_challenge = le64_to_cpu(sc->server_challenge); | |
506 | dout("handle_reply got server challenge %llx\n", | |
507 | xi->server_challenge); | |
508 | xi->starting = false; | |
509 | xi->have_keys &= ~CEPH_ENTITY_TYPE_AUTH; | |
510 | return -EAGAIN; | |
511 | } | |
512 | ||
0cf5537b | 513 | op = le16_to_cpu(head->op); |
ec0994e4 SW |
514 | result = le32_to_cpu(head->result); |
515 | dout("handle_reply op %d result %d\n", op, result); | |
516 | switch (op) { | |
517 | case CEPHX_GET_AUTH_SESSION_KEY: | |
518 | /* verify auth key */ | |
519 | ret = ceph_x_proc_ticket_reply(ac, &xi->secret, | |
520 | buf + sizeof(*head), end); | |
521 | break; | |
522 | ||
523 | case CEPHX_GET_PRINCIPAL_SESSION_KEY: | |
524 | th = get_ticket_handler(ac, CEPH_ENTITY_TYPE_AUTH); | |
b545787d DC |
525 | if (IS_ERR(th)) |
526 | return PTR_ERR(th); | |
ec0994e4 SW |
527 | ret = ceph_x_proc_ticket_reply(ac, &th->session_key, |
528 | buf + sizeof(*head), end); | |
529 | break; | |
530 | ||
531 | default: | |
532 | return -EINVAL; | |
533 | } | |
534 | if (ret) | |
535 | return ret; | |
536 | if (ac->want_keys == xi->have_keys) | |
537 | return 0; | |
538 | return -EAGAIN; | |
539 | } | |
540 | ||
541 | static int ceph_x_create_authorizer( | |
542 | struct ceph_auth_client *ac, int peer_type, | |
74f1869f | 543 | struct ceph_auth_handshake *auth) |
ec0994e4 SW |
544 | { |
545 | struct ceph_x_authorizer *au; | |
546 | struct ceph_x_ticket_handler *th; | |
547 | int ret; | |
548 | ||
549 | th = get_ticket_handler(ac, peer_type); | |
550 | if (IS_ERR(th)) | |
551 | return PTR_ERR(th); | |
552 | ||
553 | au = kzalloc(sizeof(*au), GFP_NOFS); | |
554 | if (!au) | |
555 | return -ENOMEM; | |
556 | ||
557 | ret = ceph_x_build_authorizer(ac, th, au); | |
558 | if (ret) { | |
559 | kfree(au); | |
560 | return ret; | |
561 | } | |
562 | ||
74f1869f AE |
563 | auth->authorizer = (struct ceph_authorizer *) au; |
564 | auth->authorizer_buf = au->buf->vec.iov_base; | |
565 | auth->authorizer_buf_len = au->buf->vec.iov_len; | |
566 | auth->authorizer_reply_buf = au->reply_buf; | |
567 | auth->authorizer_reply_buf_len = sizeof (au->reply_buf); | |
568 | ||
ec0994e4 SW |
569 | return 0; |
570 | } | |
571 | ||
0bed9b5c SW |
572 | static int ceph_x_update_authorizer( |
573 | struct ceph_auth_client *ac, int peer_type, | |
574 | struct ceph_auth_handshake *auth) | |
575 | { | |
576 | struct ceph_x_authorizer *au; | |
577 | struct ceph_x_ticket_handler *th; | |
0bed9b5c SW |
578 | |
579 | th = get_ticket_handler(ac, peer_type); | |
580 | if (IS_ERR(th)) | |
581 | return PTR_ERR(th); | |
582 | ||
583 | au = (struct ceph_x_authorizer *)auth->authorizer; | |
584 | if (au->secret_id < th->secret_id) { | |
585 | dout("ceph_x_update_authorizer service %u secret %llu < %llu\n", | |
586 | au->service, au->secret_id, th->secret_id); | |
587 | return ceph_x_build_authorizer(ac, th, au); | |
588 | } | |
589 | return 0; | |
590 | } | |
591 | ||
ec0994e4 SW |
592 | static int ceph_x_verify_authorizer_reply(struct ceph_auth_client *ac, |
593 | struct ceph_authorizer *a, size_t len) | |
594 | { | |
595 | struct ceph_x_authorizer *au = (void *)a; | |
596 | struct ceph_x_ticket_handler *th; | |
597 | int ret = 0; | |
598 | struct ceph_x_authorize_reply reply; | |
c27a3e4d | 599 | void *preply = &reply; |
ec0994e4 SW |
600 | void *p = au->reply_buf; |
601 | void *end = p + sizeof(au->reply_buf); | |
602 | ||
603 | th = get_ticket_handler(ac, au->service); | |
b545787d DC |
604 | if (IS_ERR(th)) |
605 | return PTR_ERR(th); | |
c27a3e4d | 606 | ret = ceph_x_decrypt(&th->session_key, &p, end, &preply, sizeof(reply)); |
ec0994e4 SW |
607 | if (ret < 0) |
608 | return ret; | |
609 | if (ret != sizeof(reply)) | |
610 | return -EPERM; | |
611 | ||
612 | if (au->nonce + 1 != le64_to_cpu(reply.nonce_plus_one)) | |
613 | ret = -EPERM; | |
614 | else | |
615 | ret = 0; | |
616 | dout("verify_authorizer_reply nonce %llx got %llx ret %d\n", | |
617 | au->nonce, le64_to_cpu(reply.nonce_plus_one), ret); | |
618 | return ret; | |
619 | } | |
620 | ||
621 | static void ceph_x_destroy_authorizer(struct ceph_auth_client *ac, | |
622 | struct ceph_authorizer *a) | |
623 | { | |
624 | struct ceph_x_authorizer *au = (void *)a; | |
625 | ||
626 | ceph_buffer_put(au->buf); | |
627 | kfree(au); | |
628 | } | |
629 | ||
630 | ||
631 | static void ceph_x_reset(struct ceph_auth_client *ac) | |
632 | { | |
633 | struct ceph_x_info *xi = ac->private; | |
634 | ||
635 | dout("reset\n"); | |
636 | xi->starting = true; | |
637 | xi->server_challenge = 0; | |
638 | } | |
639 | ||
640 | static void ceph_x_destroy(struct ceph_auth_client *ac) | |
641 | { | |
642 | struct ceph_x_info *xi = ac->private; | |
643 | struct rb_node *p; | |
644 | ||
645 | dout("ceph_x_destroy %p\n", ac); | |
646 | ceph_crypto_key_destroy(&xi->secret); | |
647 | ||
648 | while ((p = rb_first(&xi->ticket_handlers)) != NULL) { | |
649 | struct ceph_x_ticket_handler *th = | |
650 | rb_entry(p, struct ceph_x_ticket_handler, node); | |
651 | remove_ticket_handler(ac, th); | |
652 | } | |
653 | ||
22b1de06 SW |
654 | if (xi->auth_authorizer.buf) |
655 | ceph_buffer_put(xi->auth_authorizer.buf); | |
656 | ||
ec0994e4 SW |
657 | kfree(ac->private); |
658 | ac->private = NULL; | |
659 | } | |
660 | ||
661 | static void ceph_x_invalidate_authorizer(struct ceph_auth_client *ac, | |
662 | int peer_type) | |
663 | { | |
664 | struct ceph_x_ticket_handler *th; | |
665 | ||
666 | th = get_ticket_handler(ac, peer_type); | |
b545787d | 667 | if (!IS_ERR(th)) |
4b8e8b5d | 668 | memset(&th->validity, 0, sizeof(th->validity)); |
ec0994e4 SW |
669 | } |
670 | ||
671 | ||
672 | static const struct ceph_auth_client_ops ceph_x_ops = { | |
559c1e00 | 673 | .name = "x", |
ec0994e4 | 674 | .is_authenticated = ceph_x_is_authenticated, |
a41359fa | 675 | .should_authenticate = ceph_x_should_authenticate, |
ec0994e4 SW |
676 | .build_request = ceph_x_build_request, |
677 | .handle_reply = ceph_x_handle_reply, | |
678 | .create_authorizer = ceph_x_create_authorizer, | |
0bed9b5c | 679 | .update_authorizer = ceph_x_update_authorizer, |
ec0994e4 SW |
680 | .verify_authorizer_reply = ceph_x_verify_authorizer_reply, |
681 | .destroy_authorizer = ceph_x_destroy_authorizer, | |
682 | .invalidate_authorizer = ceph_x_invalidate_authorizer, | |
683 | .reset = ceph_x_reset, | |
684 | .destroy = ceph_x_destroy, | |
685 | }; | |
686 | ||
687 | ||
688 | int ceph_x_init(struct ceph_auth_client *ac) | |
689 | { | |
690 | struct ceph_x_info *xi; | |
691 | int ret; | |
692 | ||
693 | dout("ceph_x_init %p\n", ac); | |
b0930f8d | 694 | ret = -ENOMEM; |
ec0994e4 SW |
695 | xi = kzalloc(sizeof(*xi), GFP_NOFS); |
696 | if (!xi) | |
b0930f8d | 697 | goto out; |
ec0994e4 | 698 | |
ec0994e4 | 699 | ret = -EINVAL; |
8323c3aa | 700 | if (!ac->key) { |
ec0994e4 | 701 | pr_err("no secret set (for auth_x protocol)\n"); |
b0930f8d | 702 | goto out_nomem; |
ec0994e4 SW |
703 | } |
704 | ||
8323c3aa TV |
705 | ret = ceph_crypto_key_clone(&xi->secret, ac->key); |
706 | if (ret < 0) { | |
707 | pr_err("cannot clone key: %d\n", ret); | |
b0930f8d | 708 | goto out_nomem; |
8323c3aa | 709 | } |
ec0994e4 SW |
710 | |
711 | xi->starting = true; | |
712 | xi->ticket_handlers = RB_ROOT; | |
713 | ||
714 | ac->protocol = CEPH_AUTH_CEPHX; | |
715 | ac->private = xi; | |
716 | ac->ops = &ceph_x_ops; | |
717 | return 0; | |
718 | ||
b0930f8d | 719 | out_nomem: |
ec0994e4 | 720 | kfree(xi); |
b0930f8d | 721 | out: |
ec0994e4 SW |
722 | return ret; |
723 | } | |
724 | ||
725 |