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Commit | Line | Data |
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ec0994e4 SW |
1 | |
2 | #include "ceph_debug.h" | |
3 | ||
4 | #include <linux/err.h> | |
5 | #include <linux/module.h> | |
6 | #include <linux/random.h> | |
5a0e3ad6 | 7 | #include <linux/slab.h> |
ec0994e4 SW |
8 | |
9 | #include "auth_x.h" | |
10 | #include "auth_x_protocol.h" | |
11 | #include "crypto.h" | |
12 | #include "auth.h" | |
13 | #include "decode.h" | |
14 | ||
ec0994e4 SW |
15 | #define TEMP_TICKET_BUF_LEN 256 |
16 | ||
17 | static void ceph_x_validate_tickets(struct ceph_auth_client *ac, int *pneed); | |
18 | ||
19 | static int ceph_x_is_authenticated(struct ceph_auth_client *ac) | |
20 | { | |
21 | struct ceph_x_info *xi = ac->private; | |
22 | int need; | |
23 | ||
24 | ceph_x_validate_tickets(ac, &need); | |
25 | dout("ceph_x_is_authenticated want=%d need=%d have=%d\n", | |
26 | ac->want_keys, need, xi->have_keys); | |
27 | return (ac->want_keys & xi->have_keys) == ac->want_keys; | |
28 | } | |
29 | ||
a41359fa SW |
30 | static 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 | ||
807c86e2 SW |
41 | static int ceph_x_encrypt_buflen(int ilen) |
42 | { | |
43 | return sizeof(struct ceph_x_encrypt_header) + ilen + 16 + | |
44 | sizeof(u32); | |
45 | } | |
46 | ||
ec0994e4 SW |
47 | static 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 | ||
65 | static 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 | */ | |
90 | struct ceph_x_ticket_handler *get_ticket_handler(struct ceph_auth_client *ac, | |
91 | int service) | |
92 | { | |
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 | ||
118 | static 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 | ||
131 | static 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; | |
b736b3d9 | 141 | u8 reply_struct_v; |
ec0994e4 | 142 | |
b0930f8d | 143 | dbuf = kmalloc(TEMP_TICKET_BUF_LEN, GFP_NOFS); |
ec0994e4 SW |
144 | if (!dbuf) |
145 | return -ENOMEM; | |
146 | ||
147 | ret = -ENOMEM; | |
b0930f8d | 148 | ticket_buf = kmalloc(TEMP_TICKET_BUF_LEN, GFP_NOFS); |
ec0994e4 SW |
149 | if (!ticket_buf) |
150 | goto out_dbuf; | |
151 | ||
152 | ceph_decode_need(&p, end, 1 + sizeof(u32), bad); | |
b736b3d9 SW |
153 | reply_struct_v = ceph_decode_8(&p); |
154 | if (reply_struct_v != 1) | |
ec0994e4 SW |
155 | goto bad; |
156 | num = ceph_decode_32(&p); | |
157 | dout("%d tickets\n", num); | |
158 | while (num--) { | |
159 | int type; | |
b736b3d9 | 160 | u8 tkt_struct_v, blob_struct_v; |
ec0994e4 SW |
161 | 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; | |
0a990e70 SW |
168 | struct ceph_timespec new_validity; |
169 | struct ceph_crypto_key new_session_key; | |
5b3dbb44 | 170 | struct ceph_buffer *new_ticket_blob; |
0a990e70 SW |
171 | unsigned long new_expires, new_renew_after; |
172 | u64 new_secret_id; | |
ec0994e4 SW |
173 | |
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 | ||
b736b3d9 SW |
179 | tkt_struct_v = ceph_decode_8(&p); |
180 | if (tkt_struct_v != 1) | |
ec0994e4 SW |
181 | 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 | ||
b736b3d9 SW |
200 | tkt_struct_v = ceph_decode_8(&dp); |
201 | if (tkt_struct_v != 1) | |
ec0994e4 SW |
202 | goto bad; |
203 | ||
204 | memcpy(&old_key, &th->session_key, sizeof(old_key)); | |
0a990e70 | 205 | ret = ceph_crypto_key_decode(&new_session_key, &dp, dend); |
ec0994e4 SW |
206 | if (ret) |
207 | goto out; | |
208 | ||
0a990e70 SW |
209 | 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); | |
ec0994e4 SW |
215 | |
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); | |
b736b3d9 | 238 | blob_struct_v = ceph_decode_8(&tp); |
0a990e70 | 239 | new_secret_id = ceph_decode_64(&tp); |
5b3dbb44 | 240 | ret = ceph_decode_buffer(&new_ticket_blob, &tp, tpend); |
ec0994e4 SW |
241 | if (ret) |
242 | goto out; | |
0a990e70 SW |
243 | |
244 | /* all is well, update our ticket */ | |
245 | ceph_crypto_key_destroy(&th->session_key); | |
5b3dbb44 SW |
246 | if (th->ticket_blob) |
247 | ceph_buffer_put(th->ticket_blob); | |
0a990e70 | 248 | th->session_key = new_session_key; |
5b3dbb44 | 249 | th->ticket_blob = new_ticket_blob; |
0a990e70 SW |
250 | th->validity = new_validity; |
251 | th->secret_id = new_secret_id; | |
252 | th->expires = new_expires; | |
253 | th->renew_after = new_renew_after; | |
ec0994e4 SW |
254 | 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; | |
261 | out: | |
b0930f8d | 262 | kfree(ticket_buf); |
ec0994e4 | 263 | out_dbuf: |
b0930f8d | 264 | kfree(dbuf); |
ec0994e4 SW |
265 | return ret; |
266 | ||
267 | bad: | |
268 | ret = -EINVAL; | |
269 | goto out; | |
270 | } | |
271 | ||
272 | static int ceph_x_build_authorizer(struct ceph_auth_client *ac, | |
273 | struct ceph_x_ticket_handler *th, | |
274 | struct ceph_x_authorizer *au) | |
275 | { | |
807c86e2 | 276 | int maxlen; |
ec0994e4 SW |
277 | 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 | ||
807c86e2 SW |
287 | 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) { | |
ec0994e4 SW |
291 | ceph_buffer_put(au->buf); |
292 | au->buf = NULL; | |
293 | } | |
294 | if (!au->buf) { | |
807c86e2 | 295 | au->buf = ceph_buffer_new(maxlen, GFP_NOFS); |
ec0994e4 SW |
296 | 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); | |
807c86e2 | 330 | BUG_ON(au->buf->vec.iov_len > maxlen); |
ec0994e4 SW |
331 | return 0; |
332 | ||
333 | out_buf: | |
334 | ceph_buffer_put(au->buf); | |
335 | au->buf = NULL; | |
336 | return ret; | |
337 | } | |
338 | ||
339 | static 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; | |
356 | bad: | |
357 | return -ERANGE; | |
358 | } | |
359 | ||
360 | static 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 | ||
392 | static 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++) | |
432 | auth->key ^= *u; | |
433 | 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 | ||
469 | static 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 | ||
0cf5537b | 496 | op = le16_to_cpu(head->op); |
ec0994e4 SW |
497 | 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 | ||
523 | static 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 | ||
555 | static 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 | ||
583 | static 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 | ||
593 | static 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 | ||
602 | static 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 | ||
ec0994e4 SW |
616 | kfree(ac->private); |
617 | ac->private = NULL; | |
618 | } | |
619 | ||
620 | static void ceph_x_invalidate_authorizer(struct ceph_auth_client *ac, | |
621 | int peer_type) | |
622 | { | |
623 | struct ceph_x_ticket_handler *th; | |
624 | ||
625 | th = get_ticket_handler(ac, peer_type); | |
626 | if (th && !IS_ERR(th)) | |
627 | remove_ticket_handler(ac, th); | |
628 | } | |
629 | ||
630 | ||
631 | static const struct ceph_auth_client_ops ceph_x_ops = { | |
559c1e00 | 632 | .name = "x", |
ec0994e4 | 633 | .is_authenticated = ceph_x_is_authenticated, |
a41359fa | 634 | .should_authenticate = ceph_x_should_authenticate, |
ec0994e4 SW |
635 | .build_request = ceph_x_build_request, |
636 | .handle_reply = ceph_x_handle_reply, | |
637 | .create_authorizer = ceph_x_create_authorizer, | |
638 | .verify_authorizer_reply = ceph_x_verify_authorizer_reply, | |
639 | .destroy_authorizer = ceph_x_destroy_authorizer, | |
640 | .invalidate_authorizer = ceph_x_invalidate_authorizer, | |
641 | .reset = ceph_x_reset, | |
642 | .destroy = ceph_x_destroy, | |
643 | }; | |
644 | ||
645 | ||
646 | int ceph_x_init(struct ceph_auth_client *ac) | |
647 | { | |
648 | struct ceph_x_info *xi; | |
649 | int ret; | |
650 | ||
651 | dout("ceph_x_init %p\n", ac); | |
b0930f8d | 652 | ret = -ENOMEM; |
ec0994e4 SW |
653 | xi = kzalloc(sizeof(*xi), GFP_NOFS); |
654 | if (!xi) | |
b0930f8d | 655 | goto out; |
ec0994e4 | 656 | |
ec0994e4 SW |
657 | ret = -EINVAL; |
658 | if (!ac->secret) { | |
659 | pr_err("no secret set (for auth_x protocol)\n"); | |
b0930f8d | 660 | goto out_nomem; |
ec0994e4 SW |
661 | } |
662 | ||
663 | ret = ceph_crypto_key_unarmor(&xi->secret, ac->secret); | |
664 | if (ret) | |
b0930f8d | 665 | goto out_nomem; |
ec0994e4 SW |
666 | |
667 | xi->starting = true; | |
668 | xi->ticket_handlers = RB_ROOT; | |
669 | ||
670 | ac->protocol = CEPH_AUTH_CEPHX; | |
671 | ac->private = xi; | |
672 | ac->ops = &ceph_x_ops; | |
673 | return 0; | |
674 | ||
b0930f8d | 675 | out_nomem: |
ec0994e4 | 676 | kfree(xi); |
b0930f8d | 677 | out: |
ec0994e4 SW |
678 | return ret; |
679 | } | |
680 | ||
681 |