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> | |
a51983e4 | 11 | #include <linux/ceph/libceph.h> |
33d07337 | 12 | #include <linux/ceph/messenger.h> |
3d14c5d2 YS |
13 | |
14 | #include "crypto.h" | |
ec0994e4 SW |
15 | #include "auth_x.h" |
16 | #include "auth_x_protocol.h" | |
ec0994e4 | 17 | |
ec0994e4 SW |
18 | static void ceph_x_validate_tickets(struct ceph_auth_client *ac, int *pneed); |
19 | ||
20 | static int ceph_x_is_authenticated(struct ceph_auth_client *ac) | |
21 | { | |
22 | struct ceph_x_info *xi = ac->private; | |
23 | int need; | |
24 | ||
25 | ceph_x_validate_tickets(ac, &need); | |
26 | dout("ceph_x_is_authenticated want=%d need=%d have=%d\n", | |
27 | ac->want_keys, need, xi->have_keys); | |
28 | return (ac->want_keys & xi->have_keys) == ac->want_keys; | |
29 | } | |
30 | ||
a41359fa SW |
31 | static int ceph_x_should_authenticate(struct ceph_auth_client *ac) |
32 | { | |
33 | struct ceph_x_info *xi = ac->private; | |
34 | int need; | |
35 | ||
36 | ceph_x_validate_tickets(ac, &need); | |
37 | dout("ceph_x_should_authenticate want=%d need=%d have=%d\n", | |
38 | ac->want_keys, need, xi->have_keys); | |
39 | return need != 0; | |
40 | } | |
41 | ||
807c86e2 SW |
42 | static int ceph_x_encrypt_buflen(int ilen) |
43 | { | |
44 | return sizeof(struct ceph_x_encrypt_header) + ilen + 16 + | |
45 | sizeof(u32); | |
46 | } | |
47 | ||
ec0994e4 SW |
48 | static int ceph_x_encrypt(struct ceph_crypto_key *secret, |
49 | void *ibuf, int ilen, void *obuf, size_t olen) | |
50 | { | |
51 | struct ceph_x_encrypt_header head = { | |
52 | .struct_v = 1, | |
53 | .magic = cpu_to_le64(CEPHX_ENC_MAGIC) | |
54 | }; | |
55 | size_t len = olen - sizeof(u32); | |
56 | int ret; | |
57 | ||
58 | ret = ceph_encrypt2(secret, obuf + sizeof(u32), &len, | |
59 | &head, sizeof(head), ibuf, ilen); | |
60 | if (ret) | |
61 | return ret; | |
62 | ceph_encode_32(&obuf, len); | |
63 | return len + sizeof(u32); | |
64 | } | |
65 | ||
66 | static int ceph_x_decrypt(struct ceph_crypto_key *secret, | |
c27a3e4d | 67 | void **p, void *end, void **obuf, size_t olen) |
ec0994e4 SW |
68 | { |
69 | struct ceph_x_encrypt_header head; | |
70 | size_t head_len = sizeof(head); | |
71 | int len, ret; | |
72 | ||
73 | len = ceph_decode_32(p); | |
74 | if (*p + len > end) | |
75 | return -EINVAL; | |
76 | ||
77 | dout("ceph_x_decrypt len %d\n", len); | |
c27a3e4d ID |
78 | if (*obuf == NULL) { |
79 | *obuf = kmalloc(len, GFP_NOFS); | |
80 | if (!*obuf) | |
81 | return -ENOMEM; | |
82 | olen = len; | |
83 | } | |
84 | ||
85 | ret = ceph_decrypt2(secret, &head, &head_len, *obuf, &olen, *p, len); | |
ec0994e4 SW |
86 | if (ret) |
87 | return ret; | |
88 | if (head.struct_v != 1 || le64_to_cpu(head.magic) != CEPHX_ENC_MAGIC) | |
89 | return -EPERM; | |
90 | *p += len; | |
91 | return olen; | |
92 | } | |
93 | ||
94 | /* | |
95 | * get existing (or insert new) ticket handler | |
96 | */ | |
cd84db6e YS |
97 | static struct ceph_x_ticket_handler * |
98 | get_ticket_handler(struct ceph_auth_client *ac, int service) | |
ec0994e4 SW |
99 | { |
100 | struct ceph_x_ticket_handler *th; | |
101 | struct ceph_x_info *xi = ac->private; | |
102 | struct rb_node *parent = NULL, **p = &xi->ticket_handlers.rb_node; | |
103 | ||
104 | while (*p) { | |
105 | parent = *p; | |
106 | th = rb_entry(parent, struct ceph_x_ticket_handler, node); | |
107 | if (service < th->service) | |
108 | p = &(*p)->rb_left; | |
109 | else if (service > th->service) | |
110 | p = &(*p)->rb_right; | |
111 | else | |
112 | return th; | |
113 | } | |
114 | ||
115 | /* add it */ | |
116 | th = kzalloc(sizeof(*th), GFP_NOFS); | |
117 | if (!th) | |
118 | return ERR_PTR(-ENOMEM); | |
119 | th->service = service; | |
120 | rb_link_node(&th->node, parent, p); | |
121 | rb_insert_color(&th->node, &xi->ticket_handlers); | |
122 | return th; | |
123 | } | |
124 | ||
125 | static void remove_ticket_handler(struct ceph_auth_client *ac, | |
126 | struct ceph_x_ticket_handler *th) | |
127 | { | |
128 | struct ceph_x_info *xi = ac->private; | |
129 | ||
130 | dout("remove_ticket_handler %p %d\n", th, th->service); | |
131 | rb_erase(&th->node, &xi->ticket_handlers); | |
132 | ceph_crypto_key_destroy(&th->session_key); | |
133 | if (th->ticket_blob) | |
134 | ceph_buffer_put(th->ticket_blob); | |
135 | kfree(th); | |
136 | } | |
137 | ||
597cda35 ID |
138 | static int process_one_ticket(struct ceph_auth_client *ac, |
139 | struct ceph_crypto_key *secret, | |
c27a3e4d | 140 | void **p, void *end) |
597cda35 ID |
141 | { |
142 | struct ceph_x_info *xi = ac->private; | |
143 | int type; | |
144 | u8 tkt_struct_v, blob_struct_v; | |
145 | struct ceph_x_ticket_handler *th; | |
c27a3e4d | 146 | void *dbuf = NULL; |
597cda35 ID |
147 | void *dp, *dend; |
148 | int dlen; | |
149 | char is_enc; | |
150 | struct timespec validity; | |
151 | struct ceph_crypto_key old_key; | |
c27a3e4d | 152 | void *ticket_buf = NULL; |
597cda35 | 153 | void *tp, *tpend; |
e9226d7c | 154 | void **ptp; |
597cda35 ID |
155 | struct ceph_timespec new_validity; |
156 | struct ceph_crypto_key new_session_key; | |
157 | struct ceph_buffer *new_ticket_blob; | |
158 | unsigned long new_expires, new_renew_after; | |
159 | u64 new_secret_id; | |
160 | int ret; | |
161 | ||
162 | ceph_decode_need(p, end, sizeof(u32) + 1, bad); | |
163 | ||
164 | type = ceph_decode_32(p); | |
165 | dout(" ticket type %d %s\n", type, ceph_entity_type_name(type)); | |
166 | ||
167 | tkt_struct_v = ceph_decode_8(p); | |
168 | if (tkt_struct_v != 1) | |
169 | goto bad; | |
170 | ||
171 | th = get_ticket_handler(ac, type); | |
172 | if (IS_ERR(th)) { | |
173 | ret = PTR_ERR(th); | |
174 | goto out; | |
175 | } | |
176 | ||
177 | /* blob for me */ | |
c27a3e4d | 178 | dlen = ceph_x_decrypt(secret, p, end, &dbuf, 0); |
597cda35 ID |
179 | if (dlen <= 0) { |
180 | ret = dlen; | |
181 | goto out; | |
182 | } | |
183 | dout(" decrypted %d bytes\n", dlen); | |
184 | dp = dbuf; | |
185 | dend = dp + dlen; | |
186 | ||
187 | tkt_struct_v = ceph_decode_8(&dp); | |
188 | if (tkt_struct_v != 1) | |
189 | goto bad; | |
190 | ||
191 | memcpy(&old_key, &th->session_key, sizeof(old_key)); | |
192 | ret = ceph_crypto_key_decode(&new_session_key, &dp, dend); | |
193 | if (ret) | |
194 | goto out; | |
195 | ||
196 | ceph_decode_copy(&dp, &new_validity, sizeof(new_validity)); | |
197 | ceph_decode_timespec(&validity, &new_validity); | |
198 | new_expires = get_seconds() + validity.tv_sec; | |
199 | new_renew_after = new_expires - (validity.tv_sec / 4); | |
200 | dout(" expires=%lu renew_after=%lu\n", new_expires, | |
201 | new_renew_after); | |
202 | ||
203 | /* ticket blob for service */ | |
204 | ceph_decode_8_safe(p, end, is_enc, bad); | |
597cda35 ID |
205 | if (is_enc) { |
206 | /* encrypted */ | |
207 | dout(" encrypted ticket\n"); | |
c27a3e4d | 208 | dlen = ceph_x_decrypt(&old_key, p, end, &ticket_buf, 0); |
597cda35 ID |
209 | if (dlen < 0) { |
210 | ret = dlen; | |
211 | goto out; | |
212 | } | |
c27a3e4d | 213 | tp = ticket_buf; |
e9226d7c ID |
214 | ptp = &tp; |
215 | tpend = *ptp + dlen; | |
597cda35 ID |
216 | } else { |
217 | /* unencrypted */ | |
e9226d7c ID |
218 | ptp = p; |
219 | tpend = end; | |
597cda35 | 220 | } |
e9226d7c | 221 | ceph_decode_32_safe(ptp, tpend, dlen, bad); |
597cda35 | 222 | dout(" ticket blob is %d bytes\n", dlen); |
e9226d7c ID |
223 | ceph_decode_need(ptp, tpend, 1 + sizeof(u64), bad); |
224 | blob_struct_v = ceph_decode_8(ptp); | |
225 | new_secret_id = ceph_decode_64(ptp); | |
226 | ret = ceph_decode_buffer(&new_ticket_blob, ptp, tpend); | |
597cda35 ID |
227 | if (ret) |
228 | goto out; | |
229 | ||
230 | /* all is well, update our ticket */ | |
231 | ceph_crypto_key_destroy(&th->session_key); | |
232 | if (th->ticket_blob) | |
233 | ceph_buffer_put(th->ticket_blob); | |
234 | th->session_key = new_session_key; | |
235 | th->ticket_blob = new_ticket_blob; | |
236 | th->validity = new_validity; | |
237 | th->secret_id = new_secret_id; | |
238 | th->expires = new_expires; | |
239 | th->renew_after = new_renew_after; | |
240 | dout(" got ticket service %d (%s) secret_id %lld len %d\n", | |
241 | type, ceph_entity_type_name(type), th->secret_id, | |
242 | (int)th->ticket_blob->vec.iov_len); | |
243 | xi->have_keys |= th->service; | |
244 | ||
245 | out: | |
c27a3e4d ID |
246 | kfree(ticket_buf); |
247 | kfree(dbuf); | |
597cda35 ID |
248 | return ret; |
249 | ||
250 | bad: | |
251 | ret = -EINVAL; | |
252 | goto out; | |
253 | } | |
254 | ||
ec0994e4 SW |
255 | static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac, |
256 | struct ceph_crypto_key *secret, | |
257 | void *buf, void *end) | |
258 | { | |
ec0994e4 | 259 | void *p = buf; |
b736b3d9 | 260 | u8 reply_struct_v; |
597cda35 ID |
261 | u32 num; |
262 | int ret; | |
ec0994e4 | 263 | |
597cda35 | 264 | ceph_decode_8_safe(&p, end, reply_struct_v, bad); |
b736b3d9 | 265 | if (reply_struct_v != 1) |
597cda35 | 266 | return -EINVAL; |
ec0994e4 | 267 | |
597cda35 ID |
268 | ceph_decode_32_safe(&p, end, num, bad); |
269 | dout("%d tickets\n", num); | |
ec0994e4 | 270 | |
597cda35 | 271 | while (num--) { |
c27a3e4d | 272 | ret = process_one_ticket(ac, secret, &p, end); |
ec0994e4 | 273 | if (ret) |
c27a3e4d | 274 | return ret; |
ec0994e4 SW |
275 | } |
276 | ||
c27a3e4d | 277 | return 0; |
ec0994e4 SW |
278 | |
279 | bad: | |
c27a3e4d | 280 | return -EINVAL; |
ec0994e4 SW |
281 | } |
282 | ||
cbf99a11 ID |
283 | static void ceph_x_authorizer_cleanup(struct ceph_x_authorizer *au) |
284 | { | |
285 | ceph_crypto_key_destroy(&au->session_key); | |
286 | if (au->buf) { | |
287 | ceph_buffer_put(au->buf); | |
288 | au->buf = NULL; | |
289 | } | |
290 | } | |
291 | ||
ec0994e4 SW |
292 | static int ceph_x_build_authorizer(struct ceph_auth_client *ac, |
293 | struct ceph_x_ticket_handler *th, | |
294 | struct ceph_x_authorizer *au) | |
295 | { | |
807c86e2 | 296 | int maxlen; |
ec0994e4 SW |
297 | struct ceph_x_authorize_a *msg_a; |
298 | struct ceph_x_authorize_b msg_b; | |
299 | void *p, *end; | |
300 | int ret; | |
301 | int ticket_blob_len = | |
302 | (th->ticket_blob ? th->ticket_blob->vec.iov_len : 0); | |
303 | ||
304 | dout("build_authorizer for %s %p\n", | |
305 | ceph_entity_type_name(th->service), au); | |
306 | ||
ae385eaf YZ |
307 | ceph_crypto_key_destroy(&au->session_key); |
308 | ret = ceph_crypto_key_clone(&au->session_key, &th->session_key); | |
309 | if (ret) | |
cbf99a11 | 310 | goto out_au; |
ae385eaf | 311 | |
807c86e2 SW |
312 | maxlen = sizeof(*msg_a) + sizeof(msg_b) + |
313 | ceph_x_encrypt_buflen(ticket_blob_len); | |
314 | dout(" need len %d\n", maxlen); | |
315 | if (au->buf && au->buf->alloc_len < maxlen) { | |
ec0994e4 SW |
316 | ceph_buffer_put(au->buf); |
317 | au->buf = NULL; | |
318 | } | |
319 | if (!au->buf) { | |
807c86e2 | 320 | au->buf = ceph_buffer_new(maxlen, GFP_NOFS); |
ae385eaf | 321 | if (!au->buf) { |
cbf99a11 ID |
322 | ret = -ENOMEM; |
323 | goto out_au; | |
ae385eaf | 324 | } |
ec0994e4 SW |
325 | } |
326 | au->service = th->service; | |
0bed9b5c | 327 | au->secret_id = th->secret_id; |
ec0994e4 SW |
328 | |
329 | msg_a = au->buf->vec.iov_base; | |
330 | msg_a->struct_v = 1; | |
331 | msg_a->global_id = cpu_to_le64(ac->global_id); | |
332 | msg_a->service_id = cpu_to_le32(th->service); | |
333 | msg_a->ticket_blob.struct_v = 1; | |
334 | msg_a->ticket_blob.secret_id = cpu_to_le64(th->secret_id); | |
335 | msg_a->ticket_blob.blob_len = cpu_to_le32(ticket_blob_len); | |
336 | if (ticket_blob_len) { | |
337 | memcpy(msg_a->ticket_blob.blob, th->ticket_blob->vec.iov_base, | |
338 | th->ticket_blob->vec.iov_len); | |
339 | } | |
340 | dout(" th %p secret_id %lld %lld\n", th, th->secret_id, | |
341 | le64_to_cpu(msg_a->ticket_blob.secret_id)); | |
342 | ||
343 | p = msg_a + 1; | |
344 | p += ticket_blob_len; | |
345 | end = au->buf->vec.iov_base + au->buf->vec.iov_len; | |
346 | ||
347 | get_random_bytes(&au->nonce, sizeof(au->nonce)); | |
348 | msg_b.struct_v = 1; | |
349 | msg_b.nonce = cpu_to_le64(au->nonce); | |
ae385eaf | 350 | ret = ceph_x_encrypt(&au->session_key, &msg_b, sizeof(msg_b), |
ec0994e4 SW |
351 | p, end - p); |
352 | if (ret < 0) | |
cbf99a11 | 353 | goto out_au; |
ec0994e4 SW |
354 | p += ret; |
355 | au->buf->vec.iov_len = p - au->buf->vec.iov_base; | |
356 | dout(" built authorizer nonce %llx len %d\n", au->nonce, | |
357 | (int)au->buf->vec.iov_len); | |
807c86e2 | 358 | BUG_ON(au->buf->vec.iov_len > maxlen); |
ec0994e4 SW |
359 | return 0; |
360 | ||
cbf99a11 ID |
361 | out_au: |
362 | ceph_x_authorizer_cleanup(au); | |
ec0994e4 SW |
363 | return ret; |
364 | } | |
365 | ||
366 | static int ceph_x_encode_ticket(struct ceph_x_ticket_handler *th, | |
367 | void **p, void *end) | |
368 | { | |
369 | ceph_decode_need(p, end, 1 + sizeof(u64), bad); | |
370 | ceph_encode_8(p, 1); | |
371 | ceph_encode_64(p, th->secret_id); | |
372 | if (th->ticket_blob) { | |
373 | const char *buf = th->ticket_blob->vec.iov_base; | |
374 | u32 len = th->ticket_blob->vec.iov_len; | |
375 | ||
376 | ceph_encode_32_safe(p, end, len, bad); | |
377 | ceph_encode_copy_safe(p, end, buf, len, bad); | |
378 | } else { | |
379 | ceph_encode_32_safe(p, end, 0, bad); | |
380 | } | |
381 | ||
382 | return 0; | |
383 | bad: | |
384 | return -ERANGE; | |
385 | } | |
386 | ||
387 | static void ceph_x_validate_tickets(struct ceph_auth_client *ac, int *pneed) | |
388 | { | |
389 | int want = ac->want_keys; | |
390 | struct ceph_x_info *xi = ac->private; | |
391 | int service; | |
392 | ||
393 | *pneed = ac->want_keys & ~(xi->have_keys); | |
394 | ||
395 | for (service = 1; service <= want; service <<= 1) { | |
396 | struct ceph_x_ticket_handler *th; | |
397 | ||
398 | if (!(ac->want_keys & service)) | |
399 | continue; | |
400 | ||
401 | if (*pneed & service) | |
402 | continue; | |
403 | ||
404 | th = get_ticket_handler(ac, service); | |
405 | ||
b545787d | 406 | if (IS_ERR(th)) { |
ec0994e4 SW |
407 | *pneed |= service; |
408 | continue; | |
409 | } | |
410 | ||
411 | if (get_seconds() >= th->renew_after) | |
412 | *pneed |= service; | |
413 | if (get_seconds() >= th->expires) | |
414 | xi->have_keys &= ~service; | |
415 | } | |
416 | } | |
417 | ||
418 | ||
419 | static int ceph_x_build_request(struct ceph_auth_client *ac, | |
420 | void *buf, void *end) | |
421 | { | |
422 | struct ceph_x_info *xi = ac->private; | |
423 | int need; | |
424 | struct ceph_x_request_header *head = buf; | |
425 | int ret; | |
426 | struct ceph_x_ticket_handler *th = | |
427 | get_ticket_handler(ac, CEPH_ENTITY_TYPE_AUTH); | |
428 | ||
b545787d DC |
429 | if (IS_ERR(th)) |
430 | return PTR_ERR(th); | |
431 | ||
ec0994e4 SW |
432 | ceph_x_validate_tickets(ac, &need); |
433 | ||
434 | dout("build_request want %x have %x need %x\n", | |
435 | ac->want_keys, xi->have_keys, need); | |
436 | ||
437 | if (need & CEPH_ENTITY_TYPE_AUTH) { | |
438 | struct ceph_x_authenticate *auth = (void *)(head + 1); | |
439 | void *p = auth + 1; | |
440 | struct ceph_x_challenge_blob tmp; | |
441 | char tmp_enc[40]; | |
442 | u64 *u; | |
443 | ||
444 | if (p > end) | |
445 | return -ERANGE; | |
446 | ||
447 | dout(" get_auth_session_key\n"); | |
448 | head->op = cpu_to_le16(CEPHX_GET_AUTH_SESSION_KEY); | |
449 | ||
450 | /* encrypt and hash */ | |
451 | get_random_bytes(&auth->client_challenge, sizeof(u64)); | |
452 | tmp.client_challenge = auth->client_challenge; | |
453 | tmp.server_challenge = cpu_to_le64(xi->server_challenge); | |
454 | ret = ceph_x_encrypt(&xi->secret, &tmp, sizeof(tmp), | |
455 | tmp_enc, sizeof(tmp_enc)); | |
456 | if (ret < 0) | |
457 | return ret; | |
458 | ||
459 | auth->struct_v = 1; | |
460 | auth->key = 0; | |
461 | for (u = (u64 *)tmp_enc; u + 1 <= (u64 *)(tmp_enc + ret); u++) | |
cd84db6e | 462 | auth->key ^= *(__le64 *)u; |
ec0994e4 SW |
463 | dout(" server_challenge %llx client_challenge %llx key %llx\n", |
464 | xi->server_challenge, le64_to_cpu(auth->client_challenge), | |
465 | le64_to_cpu(auth->key)); | |
466 | ||
467 | /* now encode the old ticket if exists */ | |
468 | ret = ceph_x_encode_ticket(th, &p, end); | |
469 | if (ret < 0) | |
470 | return ret; | |
471 | ||
472 | return p - buf; | |
473 | } | |
474 | ||
475 | if (need) { | |
476 | void *p = head + 1; | |
477 | struct ceph_x_service_ticket_request *req; | |
478 | ||
479 | if (p > end) | |
480 | return -ERANGE; | |
481 | head->op = cpu_to_le16(CEPHX_GET_PRINCIPAL_SESSION_KEY); | |
482 | ||
ec0994e4 SW |
483 | ret = ceph_x_build_authorizer(ac, th, &xi->auth_authorizer); |
484 | if (ret) | |
485 | return ret; | |
486 | ceph_encode_copy(&p, xi->auth_authorizer.buf->vec.iov_base, | |
487 | xi->auth_authorizer.buf->vec.iov_len); | |
488 | ||
489 | req = p; | |
490 | req->keys = cpu_to_le32(need); | |
491 | p += sizeof(*req); | |
492 | return p - buf; | |
493 | } | |
494 | ||
495 | return 0; | |
496 | } | |
497 | ||
498 | static int ceph_x_handle_reply(struct ceph_auth_client *ac, int result, | |
499 | void *buf, void *end) | |
500 | { | |
501 | struct ceph_x_info *xi = ac->private; | |
502 | struct ceph_x_reply_header *head = buf; | |
503 | struct ceph_x_ticket_handler *th; | |
504 | int len = end - buf; | |
505 | int op; | |
506 | int ret; | |
507 | ||
508 | if (result) | |
509 | return result; /* XXX hmm? */ | |
510 | ||
511 | if (xi->starting) { | |
512 | /* it's a hello */ | |
513 | struct ceph_x_server_challenge *sc = buf; | |
514 | ||
515 | if (len != sizeof(*sc)) | |
516 | return -EINVAL; | |
517 | xi->server_challenge = le64_to_cpu(sc->server_challenge); | |
518 | dout("handle_reply got server challenge %llx\n", | |
519 | xi->server_challenge); | |
520 | xi->starting = false; | |
521 | xi->have_keys &= ~CEPH_ENTITY_TYPE_AUTH; | |
522 | return -EAGAIN; | |
523 | } | |
524 | ||
0cf5537b | 525 | op = le16_to_cpu(head->op); |
ec0994e4 SW |
526 | result = le32_to_cpu(head->result); |
527 | dout("handle_reply op %d result %d\n", op, result); | |
528 | switch (op) { | |
529 | case CEPHX_GET_AUTH_SESSION_KEY: | |
530 | /* verify auth key */ | |
531 | ret = ceph_x_proc_ticket_reply(ac, &xi->secret, | |
532 | buf + sizeof(*head), end); | |
533 | break; | |
534 | ||
535 | case CEPHX_GET_PRINCIPAL_SESSION_KEY: | |
536 | th = get_ticket_handler(ac, CEPH_ENTITY_TYPE_AUTH); | |
b545787d DC |
537 | if (IS_ERR(th)) |
538 | return PTR_ERR(th); | |
ec0994e4 SW |
539 | ret = ceph_x_proc_ticket_reply(ac, &th->session_key, |
540 | buf + sizeof(*head), end); | |
541 | break; | |
542 | ||
543 | default: | |
544 | return -EINVAL; | |
545 | } | |
546 | if (ret) | |
547 | return ret; | |
548 | if (ac->want_keys == xi->have_keys) | |
549 | return 0; | |
550 | return -EAGAIN; | |
551 | } | |
552 | ||
553 | static int ceph_x_create_authorizer( | |
554 | struct ceph_auth_client *ac, int peer_type, | |
74f1869f | 555 | struct ceph_auth_handshake *auth) |
ec0994e4 SW |
556 | { |
557 | struct ceph_x_authorizer *au; | |
558 | struct ceph_x_ticket_handler *th; | |
559 | int ret; | |
560 | ||
561 | th = get_ticket_handler(ac, peer_type); | |
562 | if (IS_ERR(th)) | |
563 | return PTR_ERR(th); | |
564 | ||
565 | au = kzalloc(sizeof(*au), GFP_NOFS); | |
566 | if (!au) | |
567 | return -ENOMEM; | |
568 | ||
569 | ret = ceph_x_build_authorizer(ac, th, au); | |
570 | if (ret) { | |
571 | kfree(au); | |
572 | return ret; | |
573 | } | |
574 | ||
74f1869f AE |
575 | auth->authorizer = (struct ceph_authorizer *) au; |
576 | auth->authorizer_buf = au->buf->vec.iov_base; | |
577 | auth->authorizer_buf_len = au->buf->vec.iov_len; | |
578 | auth->authorizer_reply_buf = au->reply_buf; | |
579 | auth->authorizer_reply_buf_len = sizeof (au->reply_buf); | |
33d07337 YZ |
580 | auth->sign_message = ac->ops->sign_message; |
581 | auth->check_message_signature = ac->ops->check_message_signature; | |
74f1869f | 582 | |
ec0994e4 SW |
583 | return 0; |
584 | } | |
585 | ||
0bed9b5c SW |
586 | static int ceph_x_update_authorizer( |
587 | struct ceph_auth_client *ac, int peer_type, | |
588 | struct ceph_auth_handshake *auth) | |
589 | { | |
590 | struct ceph_x_authorizer *au; | |
591 | struct ceph_x_ticket_handler *th; | |
0bed9b5c SW |
592 | |
593 | th = get_ticket_handler(ac, peer_type); | |
594 | if (IS_ERR(th)) | |
595 | return PTR_ERR(th); | |
596 | ||
597 | au = (struct ceph_x_authorizer *)auth->authorizer; | |
598 | if (au->secret_id < th->secret_id) { | |
599 | dout("ceph_x_update_authorizer service %u secret %llu < %llu\n", | |
600 | au->service, au->secret_id, th->secret_id); | |
601 | return ceph_x_build_authorizer(ac, th, au); | |
602 | } | |
603 | return 0; | |
604 | } | |
605 | ||
ec0994e4 SW |
606 | static int ceph_x_verify_authorizer_reply(struct ceph_auth_client *ac, |
607 | struct ceph_authorizer *a, size_t len) | |
608 | { | |
609 | struct ceph_x_authorizer *au = (void *)a; | |
ec0994e4 SW |
610 | int ret = 0; |
611 | struct ceph_x_authorize_reply reply; | |
c27a3e4d | 612 | void *preply = &reply; |
ec0994e4 SW |
613 | void *p = au->reply_buf; |
614 | void *end = p + sizeof(au->reply_buf); | |
615 | ||
ae385eaf | 616 | ret = ceph_x_decrypt(&au->session_key, &p, end, &preply, sizeof(reply)); |
ec0994e4 SW |
617 | if (ret < 0) |
618 | return ret; | |
619 | if (ret != sizeof(reply)) | |
620 | return -EPERM; | |
621 | ||
622 | if (au->nonce + 1 != le64_to_cpu(reply.nonce_plus_one)) | |
623 | ret = -EPERM; | |
624 | else | |
625 | ret = 0; | |
626 | dout("verify_authorizer_reply nonce %llx got %llx ret %d\n", | |
627 | au->nonce, le64_to_cpu(reply.nonce_plus_one), ret); | |
628 | return ret; | |
629 | } | |
630 | ||
631 | static void ceph_x_destroy_authorizer(struct ceph_auth_client *ac, | |
632 | struct ceph_authorizer *a) | |
633 | { | |
634 | struct ceph_x_authorizer *au = (void *)a; | |
635 | ||
cbf99a11 | 636 | ceph_x_authorizer_cleanup(au); |
ec0994e4 SW |
637 | kfree(au); |
638 | } | |
639 | ||
640 | ||
641 | static void ceph_x_reset(struct ceph_auth_client *ac) | |
642 | { | |
643 | struct ceph_x_info *xi = ac->private; | |
644 | ||
645 | dout("reset\n"); | |
646 | xi->starting = true; | |
647 | xi->server_challenge = 0; | |
648 | } | |
649 | ||
650 | static void ceph_x_destroy(struct ceph_auth_client *ac) | |
651 | { | |
652 | struct ceph_x_info *xi = ac->private; | |
653 | struct rb_node *p; | |
654 | ||
655 | dout("ceph_x_destroy %p\n", ac); | |
656 | ceph_crypto_key_destroy(&xi->secret); | |
657 | ||
658 | while ((p = rb_first(&xi->ticket_handlers)) != NULL) { | |
659 | struct ceph_x_ticket_handler *th = | |
660 | rb_entry(p, struct ceph_x_ticket_handler, node); | |
661 | remove_ticket_handler(ac, th); | |
662 | } | |
663 | ||
cbf99a11 | 664 | ceph_x_authorizer_cleanup(&xi->auth_authorizer); |
22b1de06 | 665 | |
ec0994e4 SW |
666 | kfree(ac->private); |
667 | ac->private = NULL; | |
668 | } | |
669 | ||
670 | static void ceph_x_invalidate_authorizer(struct ceph_auth_client *ac, | |
671 | int peer_type) | |
672 | { | |
673 | struct ceph_x_ticket_handler *th; | |
674 | ||
675 | th = get_ticket_handler(ac, peer_type); | |
b545787d | 676 | if (!IS_ERR(th)) |
4b8e8b5d | 677 | memset(&th->validity, 0, sizeof(th->validity)); |
ec0994e4 SW |
678 | } |
679 | ||
33d07337 YZ |
680 | static int calcu_signature(struct ceph_x_authorizer *au, |
681 | struct ceph_msg *msg, __le64 *sig) | |
682 | { | |
683 | int ret; | |
684 | char tmp_enc[40]; | |
685 | __le32 tmp[5] = { | |
d7d5a007 | 686 | cpu_to_le32(16), msg->hdr.crc, msg->footer.front_crc, |
33d07337 YZ |
687 | msg->footer.middle_crc, msg->footer.data_crc, |
688 | }; | |
689 | ret = ceph_x_encrypt(&au->session_key, &tmp, sizeof(tmp), | |
690 | tmp_enc, sizeof(tmp_enc)); | |
691 | if (ret < 0) | |
692 | return ret; | |
693 | *sig = *(__le64*)(tmp_enc + 4); | |
694 | return 0; | |
695 | } | |
696 | ||
697 | static int ceph_x_sign_message(struct ceph_auth_handshake *auth, | |
698 | struct ceph_msg *msg) | |
699 | { | |
700 | int ret; | |
4199b8ee | 701 | |
a51983e4 ID |
702 | if (ceph_test_opt(from_msgr(msg->con->msgr), NOMSGSIGN)) |
703 | return 0; | |
704 | ||
33d07337 YZ |
705 | ret = calcu_signature((struct ceph_x_authorizer *)auth->authorizer, |
706 | msg, &msg->footer.sig); | |
707 | if (ret < 0) | |
708 | return ret; | |
709 | msg->footer.flags |= CEPH_MSG_FOOTER_SIGNED; | |
710 | return 0; | |
711 | } | |
712 | ||
713 | static int ceph_x_check_message_signature(struct ceph_auth_handshake *auth, | |
714 | struct ceph_msg *msg) | |
715 | { | |
716 | __le64 sig_check; | |
717 | int ret; | |
718 | ||
a51983e4 ID |
719 | if (ceph_test_opt(from_msgr(msg->con->msgr), NOMSGSIGN)) |
720 | return 0; | |
721 | ||
33d07337 YZ |
722 | ret = calcu_signature((struct ceph_x_authorizer *)auth->authorizer, |
723 | msg, &sig_check); | |
724 | if (ret < 0) | |
725 | return ret; | |
726 | if (sig_check == msg->footer.sig) | |
727 | return 0; | |
728 | if (msg->footer.flags & CEPH_MSG_FOOTER_SIGNED) | |
729 | dout("ceph_x_check_message_signature %p has signature %llx " | |
730 | "expect %llx\n", msg, msg->footer.sig, sig_check); | |
731 | else | |
732 | dout("ceph_x_check_message_signature %p sender did not set " | |
733 | "CEPH_MSG_FOOTER_SIGNED\n", msg); | |
734 | return -EBADMSG; | |
735 | } | |
ec0994e4 SW |
736 | |
737 | static const struct ceph_auth_client_ops ceph_x_ops = { | |
559c1e00 | 738 | .name = "x", |
ec0994e4 | 739 | .is_authenticated = ceph_x_is_authenticated, |
a41359fa | 740 | .should_authenticate = ceph_x_should_authenticate, |
ec0994e4 SW |
741 | .build_request = ceph_x_build_request, |
742 | .handle_reply = ceph_x_handle_reply, | |
743 | .create_authorizer = ceph_x_create_authorizer, | |
0bed9b5c | 744 | .update_authorizer = ceph_x_update_authorizer, |
ec0994e4 SW |
745 | .verify_authorizer_reply = ceph_x_verify_authorizer_reply, |
746 | .destroy_authorizer = ceph_x_destroy_authorizer, | |
747 | .invalidate_authorizer = ceph_x_invalidate_authorizer, | |
748 | .reset = ceph_x_reset, | |
749 | .destroy = ceph_x_destroy, | |
33d07337 YZ |
750 | .sign_message = ceph_x_sign_message, |
751 | .check_message_signature = ceph_x_check_message_signature, | |
ec0994e4 SW |
752 | }; |
753 | ||
754 | ||
755 | int ceph_x_init(struct ceph_auth_client *ac) | |
756 | { | |
757 | struct ceph_x_info *xi; | |
758 | int ret; | |
759 | ||
760 | dout("ceph_x_init %p\n", ac); | |
b0930f8d | 761 | ret = -ENOMEM; |
ec0994e4 SW |
762 | xi = kzalloc(sizeof(*xi), GFP_NOFS); |
763 | if (!xi) | |
b0930f8d | 764 | goto out; |
ec0994e4 | 765 | |
ec0994e4 | 766 | ret = -EINVAL; |
8323c3aa | 767 | if (!ac->key) { |
ec0994e4 | 768 | pr_err("no secret set (for auth_x protocol)\n"); |
b0930f8d | 769 | goto out_nomem; |
ec0994e4 SW |
770 | } |
771 | ||
8323c3aa TV |
772 | ret = ceph_crypto_key_clone(&xi->secret, ac->key); |
773 | if (ret < 0) { | |
774 | pr_err("cannot clone key: %d\n", ret); | |
b0930f8d | 775 | goto out_nomem; |
8323c3aa | 776 | } |
ec0994e4 SW |
777 | |
778 | xi->starting = true; | |
779 | xi->ticket_handlers = RB_ROOT; | |
780 | ||
781 | ac->protocol = CEPH_AUTH_CEPHX; | |
782 | ac->private = xi; | |
783 | ac->ops = &ceph_x_ops; | |
784 | return 0; | |
785 | ||
b0930f8d | 786 | out_nomem: |
ec0994e4 | 787 | kfree(xi); |
b0930f8d | 788 | out: |
ec0994e4 SW |
789 | return ret; |
790 | } | |
791 | ||
792 |