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 | #define TEMP_TICKET_BUF_LEN 256 |
17 | ||
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, | |
67 | void **p, void *end, void *obuf, size_t olen) | |
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); | |
78 | ret = ceph_decrypt2(secret, &head, &head_len, obuf, &olen, | |
79 | *p, len); | |
80 | if (ret) | |
81 | return ret; | |
82 | if (head.struct_v != 1 || le64_to_cpu(head.magic) != CEPHX_ENC_MAGIC) | |
83 | return -EPERM; | |
84 | *p += len; | |
85 | return olen; | |
86 | } | |
87 | ||
88 | /* | |
89 | * get existing (or insert new) ticket handler | |
90 | */ | |
cd84db6e YS |
91 | static struct ceph_x_ticket_handler * |
92 | get_ticket_handler(struct ceph_auth_client *ac, int service) | |
ec0994e4 SW |
93 | { |
94 | struct ceph_x_ticket_handler *th; | |
95 | struct ceph_x_info *xi = ac->private; | |
96 | struct rb_node *parent = NULL, **p = &xi->ticket_handlers.rb_node; | |
97 | ||
98 | while (*p) { | |
99 | parent = *p; | |
100 | th = rb_entry(parent, struct ceph_x_ticket_handler, node); | |
101 | if (service < th->service) | |
102 | p = &(*p)->rb_left; | |
103 | else if (service > th->service) | |
104 | p = &(*p)->rb_right; | |
105 | else | |
106 | return th; | |
107 | } | |
108 | ||
109 | /* add it */ | |
110 | th = kzalloc(sizeof(*th), GFP_NOFS); | |
111 | if (!th) | |
112 | return ERR_PTR(-ENOMEM); | |
113 | th->service = service; | |
114 | rb_link_node(&th->node, parent, p); | |
115 | rb_insert_color(&th->node, &xi->ticket_handlers); | |
116 | return th; | |
117 | } | |
118 | ||
119 | static void remove_ticket_handler(struct ceph_auth_client *ac, | |
120 | struct ceph_x_ticket_handler *th) | |
121 | { | |
122 | struct ceph_x_info *xi = ac->private; | |
123 | ||
124 | dout("remove_ticket_handler %p %d\n", th, th->service); | |
125 | rb_erase(&th->node, &xi->ticket_handlers); | |
126 | ceph_crypto_key_destroy(&th->session_key); | |
127 | if (th->ticket_blob) | |
128 | ceph_buffer_put(th->ticket_blob); | |
129 | kfree(th); | |
130 | } | |
131 | ||
132 | static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac, | |
133 | struct ceph_crypto_key *secret, | |
134 | void *buf, void *end) | |
135 | { | |
136 | struct ceph_x_info *xi = ac->private; | |
137 | int num; | |
138 | void *p = buf; | |
139 | int ret; | |
140 | char *dbuf; | |
141 | char *ticket_buf; | |
b736b3d9 | 142 | u8 reply_struct_v; |
ec0994e4 | 143 | |
b0930f8d | 144 | dbuf = kmalloc(TEMP_TICKET_BUF_LEN, GFP_NOFS); |
ec0994e4 SW |
145 | if (!dbuf) |
146 | return -ENOMEM; | |
147 | ||
148 | ret = -ENOMEM; | |
b0930f8d | 149 | ticket_buf = kmalloc(TEMP_TICKET_BUF_LEN, GFP_NOFS); |
ec0994e4 SW |
150 | if (!ticket_buf) |
151 | goto out_dbuf; | |
152 | ||
153 | ceph_decode_need(&p, end, 1 + sizeof(u32), bad); | |
b736b3d9 SW |
154 | reply_struct_v = ceph_decode_8(&p); |
155 | if (reply_struct_v != 1) | |
ec0994e4 SW |
156 | goto bad; |
157 | num = ceph_decode_32(&p); | |
158 | dout("%d tickets\n", num); | |
159 | while (num--) { | |
160 | int type; | |
b736b3d9 | 161 | u8 tkt_struct_v, blob_struct_v; |
ec0994e4 SW |
162 | struct ceph_x_ticket_handler *th; |
163 | void *dp, *dend; | |
164 | int dlen; | |
165 | char is_enc; | |
166 | struct timespec validity; | |
167 | struct ceph_crypto_key old_key; | |
168 | void *tp, *tpend; | |
0a990e70 SW |
169 | struct ceph_timespec new_validity; |
170 | struct ceph_crypto_key new_session_key; | |
5b3dbb44 | 171 | struct ceph_buffer *new_ticket_blob; |
0a990e70 SW |
172 | unsigned long new_expires, new_renew_after; |
173 | u64 new_secret_id; | |
ec0994e4 SW |
174 | |
175 | ceph_decode_need(&p, end, sizeof(u32) + 1, bad); | |
176 | ||
177 | type = ceph_decode_32(&p); | |
178 | dout(" ticket type %d %s\n", type, ceph_entity_type_name(type)); | |
179 | ||
b736b3d9 SW |
180 | tkt_struct_v = ceph_decode_8(&p); |
181 | if (tkt_struct_v != 1) | |
ec0994e4 SW |
182 | goto bad; |
183 | ||
184 | th = get_ticket_handler(ac, type); | |
185 | if (IS_ERR(th)) { | |
186 | ret = PTR_ERR(th); | |
187 | goto out; | |
188 | } | |
189 | ||
190 | /* blob for me */ | |
191 | dlen = ceph_x_decrypt(secret, &p, end, dbuf, | |
192 | TEMP_TICKET_BUF_LEN); | |
193 | if (dlen <= 0) { | |
194 | ret = dlen; | |
195 | goto out; | |
196 | } | |
197 | dout(" decrypted %d bytes\n", dlen); | |
198 | dend = dbuf + dlen; | |
199 | dp = dbuf; | |
200 | ||
b736b3d9 SW |
201 | tkt_struct_v = ceph_decode_8(&dp); |
202 | if (tkt_struct_v != 1) | |
ec0994e4 SW |
203 | goto bad; |
204 | ||
205 | memcpy(&old_key, &th->session_key, sizeof(old_key)); | |
0a990e70 | 206 | ret = ceph_crypto_key_decode(&new_session_key, &dp, dend); |
ec0994e4 SW |
207 | if (ret) |
208 | goto out; | |
209 | ||
0a990e70 SW |
210 | ceph_decode_copy(&dp, &new_validity, sizeof(new_validity)); |
211 | ceph_decode_timespec(&validity, &new_validity); | |
212 | new_expires = get_seconds() + validity.tv_sec; | |
213 | new_renew_after = new_expires - (validity.tv_sec / 4); | |
214 | dout(" expires=%lu renew_after=%lu\n", new_expires, | |
215 | new_renew_after); | |
ec0994e4 SW |
216 | |
217 | /* ticket blob for service */ | |
218 | ceph_decode_8_safe(&p, end, is_enc, bad); | |
219 | tp = ticket_buf; | |
220 | if (is_enc) { | |
221 | /* encrypted */ | |
222 | dout(" encrypted ticket\n"); | |
223 | dlen = ceph_x_decrypt(&old_key, &p, end, ticket_buf, | |
224 | TEMP_TICKET_BUF_LEN); | |
225 | if (dlen < 0) { | |
226 | ret = dlen; | |
227 | goto out; | |
228 | } | |
229 | dlen = ceph_decode_32(&tp); | |
230 | } else { | |
231 | /* unencrypted */ | |
232 | ceph_decode_32_safe(&p, end, dlen, bad); | |
233 | ceph_decode_need(&p, end, dlen, bad); | |
234 | ceph_decode_copy(&p, ticket_buf, dlen); | |
235 | } | |
236 | tpend = tp + dlen; | |
237 | dout(" ticket blob is %d bytes\n", dlen); | |
238 | ceph_decode_need(&tp, tpend, 1 + sizeof(u64), bad); | |
b736b3d9 | 239 | blob_struct_v = ceph_decode_8(&tp); |
0a990e70 | 240 | new_secret_id = ceph_decode_64(&tp); |
5b3dbb44 | 241 | ret = ceph_decode_buffer(&new_ticket_blob, &tp, tpend); |
ec0994e4 SW |
242 | if (ret) |
243 | goto out; | |
0a990e70 SW |
244 | |
245 | /* all is well, update our ticket */ | |
246 | ceph_crypto_key_destroy(&th->session_key); | |
5b3dbb44 SW |
247 | if (th->ticket_blob) |
248 | ceph_buffer_put(th->ticket_blob); | |
0a990e70 | 249 | th->session_key = new_session_key; |
5b3dbb44 | 250 | th->ticket_blob = new_ticket_blob; |
0a990e70 SW |
251 | th->validity = new_validity; |
252 | th->secret_id = new_secret_id; | |
253 | th->expires = new_expires; | |
254 | th->renew_after = new_renew_after; | |
ec0994e4 SW |
255 | dout(" got ticket service %d (%s) secret_id %lld len %d\n", |
256 | type, ceph_entity_type_name(type), th->secret_id, | |
257 | (int)th->ticket_blob->vec.iov_len); | |
258 | xi->have_keys |= th->service; | |
259 | } | |
260 | ||
261 | ret = 0; | |
262 | out: | |
b0930f8d | 263 | kfree(ticket_buf); |
ec0994e4 | 264 | out_dbuf: |
b0930f8d | 265 | kfree(dbuf); |
ec0994e4 SW |
266 | return ret; |
267 | ||
268 | bad: | |
269 | ret = -EINVAL; | |
270 | goto out; | |
271 | } | |
272 | ||
273 | static int ceph_x_build_authorizer(struct ceph_auth_client *ac, | |
274 | struct ceph_x_ticket_handler *th, | |
275 | struct ceph_x_authorizer *au) | |
276 | { | |
807c86e2 | 277 | int maxlen; |
ec0994e4 SW |
278 | struct ceph_x_authorize_a *msg_a; |
279 | struct ceph_x_authorize_b msg_b; | |
280 | void *p, *end; | |
281 | int ret; | |
282 | int ticket_blob_len = | |
283 | (th->ticket_blob ? th->ticket_blob->vec.iov_len : 0); | |
284 | ||
285 | dout("build_authorizer for %s %p\n", | |
286 | ceph_entity_type_name(th->service), au); | |
287 | ||
807c86e2 SW |
288 | maxlen = sizeof(*msg_a) + sizeof(msg_b) + |
289 | ceph_x_encrypt_buflen(ticket_blob_len); | |
290 | dout(" need len %d\n", maxlen); | |
291 | if (au->buf && au->buf->alloc_len < maxlen) { | |
ec0994e4 SW |
292 | ceph_buffer_put(au->buf); |
293 | au->buf = NULL; | |
294 | } | |
295 | if (!au->buf) { | |
807c86e2 | 296 | au->buf = ceph_buffer_new(maxlen, GFP_NOFS); |
ec0994e4 SW |
297 | if (!au->buf) |
298 | return -ENOMEM; | |
299 | } | |
300 | au->service = th->service; | |
301 | ||
302 | msg_a = au->buf->vec.iov_base; | |
303 | msg_a->struct_v = 1; | |
304 | msg_a->global_id = cpu_to_le64(ac->global_id); | |
305 | msg_a->service_id = cpu_to_le32(th->service); | |
306 | msg_a->ticket_blob.struct_v = 1; | |
307 | msg_a->ticket_blob.secret_id = cpu_to_le64(th->secret_id); | |
308 | msg_a->ticket_blob.blob_len = cpu_to_le32(ticket_blob_len); | |
309 | if (ticket_blob_len) { | |
310 | memcpy(msg_a->ticket_blob.blob, th->ticket_blob->vec.iov_base, | |
311 | th->ticket_blob->vec.iov_len); | |
312 | } | |
313 | dout(" th %p secret_id %lld %lld\n", th, th->secret_id, | |
314 | le64_to_cpu(msg_a->ticket_blob.secret_id)); | |
315 | ||
316 | p = msg_a + 1; | |
317 | p += ticket_blob_len; | |
318 | end = au->buf->vec.iov_base + au->buf->vec.iov_len; | |
319 | ||
320 | get_random_bytes(&au->nonce, sizeof(au->nonce)); | |
321 | msg_b.struct_v = 1; | |
322 | msg_b.nonce = cpu_to_le64(au->nonce); | |
323 | ret = ceph_x_encrypt(&th->session_key, &msg_b, sizeof(msg_b), | |
324 | p, end - p); | |
325 | if (ret < 0) | |
326 | goto out_buf; | |
327 | p += ret; | |
328 | au->buf->vec.iov_len = p - au->buf->vec.iov_base; | |
329 | dout(" built authorizer nonce %llx len %d\n", au->nonce, | |
330 | (int)au->buf->vec.iov_len); | |
807c86e2 | 331 | BUG_ON(au->buf->vec.iov_len > maxlen); |
ec0994e4 SW |
332 | return 0; |
333 | ||
334 | out_buf: | |
335 | ceph_buffer_put(au->buf); | |
336 | au->buf = NULL; | |
337 | return ret; | |
338 | } | |
339 | ||
340 | static int ceph_x_encode_ticket(struct ceph_x_ticket_handler *th, | |
341 | void **p, void *end) | |
342 | { | |
343 | ceph_decode_need(p, end, 1 + sizeof(u64), bad); | |
344 | ceph_encode_8(p, 1); | |
345 | ceph_encode_64(p, th->secret_id); | |
346 | if (th->ticket_blob) { | |
347 | const char *buf = th->ticket_blob->vec.iov_base; | |
348 | u32 len = th->ticket_blob->vec.iov_len; | |
349 | ||
350 | ceph_encode_32_safe(p, end, len, bad); | |
351 | ceph_encode_copy_safe(p, end, buf, len, bad); | |
352 | } else { | |
353 | ceph_encode_32_safe(p, end, 0, bad); | |
354 | } | |
355 | ||
356 | return 0; | |
357 | bad: | |
358 | return -ERANGE; | |
359 | } | |
360 | ||
361 | static void ceph_x_validate_tickets(struct ceph_auth_client *ac, int *pneed) | |
362 | { | |
363 | int want = ac->want_keys; | |
364 | struct ceph_x_info *xi = ac->private; | |
365 | int service; | |
366 | ||
367 | *pneed = ac->want_keys & ~(xi->have_keys); | |
368 | ||
369 | for (service = 1; service <= want; service <<= 1) { | |
370 | struct ceph_x_ticket_handler *th; | |
371 | ||
372 | if (!(ac->want_keys & service)) | |
373 | continue; | |
374 | ||
375 | if (*pneed & service) | |
376 | continue; | |
377 | ||
378 | th = get_ticket_handler(ac, service); | |
379 | ||
b545787d | 380 | if (IS_ERR(th)) { |
ec0994e4 SW |
381 | *pneed |= service; |
382 | continue; | |
383 | } | |
384 | ||
385 | if (get_seconds() >= th->renew_after) | |
386 | *pneed |= service; | |
387 | if (get_seconds() >= th->expires) | |
388 | xi->have_keys &= ~service; | |
389 | } | |
390 | } | |
391 | ||
392 | ||
393 | static int ceph_x_build_request(struct ceph_auth_client *ac, | |
394 | void *buf, void *end) | |
395 | { | |
396 | struct ceph_x_info *xi = ac->private; | |
397 | int need; | |
398 | struct ceph_x_request_header *head = buf; | |
399 | int ret; | |
400 | struct ceph_x_ticket_handler *th = | |
401 | get_ticket_handler(ac, CEPH_ENTITY_TYPE_AUTH); | |
402 | ||
b545787d DC |
403 | if (IS_ERR(th)) |
404 | return PTR_ERR(th); | |
405 | ||
ec0994e4 SW |
406 | ceph_x_validate_tickets(ac, &need); |
407 | ||
408 | dout("build_request want %x have %x need %x\n", | |
409 | ac->want_keys, xi->have_keys, need); | |
410 | ||
411 | if (need & CEPH_ENTITY_TYPE_AUTH) { | |
412 | struct ceph_x_authenticate *auth = (void *)(head + 1); | |
413 | void *p = auth + 1; | |
414 | struct ceph_x_challenge_blob tmp; | |
415 | char tmp_enc[40]; | |
416 | u64 *u; | |
417 | ||
418 | if (p > end) | |
419 | return -ERANGE; | |
420 | ||
421 | dout(" get_auth_session_key\n"); | |
422 | head->op = cpu_to_le16(CEPHX_GET_AUTH_SESSION_KEY); | |
423 | ||
424 | /* encrypt and hash */ | |
425 | get_random_bytes(&auth->client_challenge, sizeof(u64)); | |
426 | tmp.client_challenge = auth->client_challenge; | |
427 | tmp.server_challenge = cpu_to_le64(xi->server_challenge); | |
428 | ret = ceph_x_encrypt(&xi->secret, &tmp, sizeof(tmp), | |
429 | tmp_enc, sizeof(tmp_enc)); | |
430 | if (ret < 0) | |
431 | return ret; | |
432 | ||
433 | auth->struct_v = 1; | |
434 | auth->key = 0; | |
435 | for (u = (u64 *)tmp_enc; u + 1 <= (u64 *)(tmp_enc + ret); u++) | |
cd84db6e | 436 | auth->key ^= *(__le64 *)u; |
ec0994e4 SW |
437 | dout(" server_challenge %llx client_challenge %llx key %llx\n", |
438 | xi->server_challenge, le64_to_cpu(auth->client_challenge), | |
439 | le64_to_cpu(auth->key)); | |
440 | ||
441 | /* now encode the old ticket if exists */ | |
442 | ret = ceph_x_encode_ticket(th, &p, end); | |
443 | if (ret < 0) | |
444 | return ret; | |
445 | ||
446 | return p - buf; | |
447 | } | |
448 | ||
449 | if (need) { | |
450 | void *p = head + 1; | |
451 | struct ceph_x_service_ticket_request *req; | |
452 | ||
453 | if (p > end) | |
454 | return -ERANGE; | |
455 | head->op = cpu_to_le16(CEPHX_GET_PRINCIPAL_SESSION_KEY); | |
456 | ||
ec0994e4 SW |
457 | ret = ceph_x_build_authorizer(ac, th, &xi->auth_authorizer); |
458 | if (ret) | |
459 | return ret; | |
460 | ceph_encode_copy(&p, xi->auth_authorizer.buf->vec.iov_base, | |
461 | xi->auth_authorizer.buf->vec.iov_len); | |
462 | ||
463 | req = p; | |
464 | req->keys = cpu_to_le32(need); | |
465 | p += sizeof(*req); | |
466 | return p - buf; | |
467 | } | |
468 | ||
469 | return 0; | |
470 | } | |
471 | ||
472 | static int ceph_x_handle_reply(struct ceph_auth_client *ac, int result, | |
473 | void *buf, void *end) | |
474 | { | |
475 | struct ceph_x_info *xi = ac->private; | |
476 | struct ceph_x_reply_header *head = buf; | |
477 | struct ceph_x_ticket_handler *th; | |
478 | int len = end - buf; | |
479 | int op; | |
480 | int ret; | |
481 | ||
482 | if (result) | |
483 | return result; /* XXX hmm? */ | |
484 | ||
485 | if (xi->starting) { | |
486 | /* it's a hello */ | |
487 | struct ceph_x_server_challenge *sc = buf; | |
488 | ||
489 | if (len != sizeof(*sc)) | |
490 | return -EINVAL; | |
491 | xi->server_challenge = le64_to_cpu(sc->server_challenge); | |
492 | dout("handle_reply got server challenge %llx\n", | |
493 | xi->server_challenge); | |
494 | xi->starting = false; | |
495 | xi->have_keys &= ~CEPH_ENTITY_TYPE_AUTH; | |
496 | return -EAGAIN; | |
497 | } | |
498 | ||
0cf5537b | 499 | op = le16_to_cpu(head->op); |
ec0994e4 SW |
500 | result = le32_to_cpu(head->result); |
501 | dout("handle_reply op %d result %d\n", op, result); | |
502 | switch (op) { | |
503 | case CEPHX_GET_AUTH_SESSION_KEY: | |
504 | /* verify auth key */ | |
505 | ret = ceph_x_proc_ticket_reply(ac, &xi->secret, | |
506 | buf + sizeof(*head), end); | |
507 | break; | |
508 | ||
509 | case CEPHX_GET_PRINCIPAL_SESSION_KEY: | |
510 | th = get_ticket_handler(ac, CEPH_ENTITY_TYPE_AUTH); | |
b545787d DC |
511 | if (IS_ERR(th)) |
512 | return PTR_ERR(th); | |
ec0994e4 SW |
513 | ret = ceph_x_proc_ticket_reply(ac, &th->session_key, |
514 | buf + sizeof(*head), end); | |
515 | break; | |
516 | ||
517 | default: | |
518 | return -EINVAL; | |
519 | } | |
520 | if (ret) | |
521 | return ret; | |
522 | if (ac->want_keys == xi->have_keys) | |
523 | return 0; | |
524 | return -EAGAIN; | |
525 | } | |
526 | ||
527 | static int ceph_x_create_authorizer( | |
528 | struct ceph_auth_client *ac, int peer_type, | |
74f1869f | 529 | struct ceph_auth_handshake *auth) |
ec0994e4 SW |
530 | { |
531 | struct ceph_x_authorizer *au; | |
532 | struct ceph_x_ticket_handler *th; | |
533 | int ret; | |
534 | ||
535 | th = get_ticket_handler(ac, peer_type); | |
536 | if (IS_ERR(th)) | |
537 | return PTR_ERR(th); | |
538 | ||
539 | au = kzalloc(sizeof(*au), GFP_NOFS); | |
540 | if (!au) | |
541 | return -ENOMEM; | |
542 | ||
543 | ret = ceph_x_build_authorizer(ac, th, au); | |
544 | if (ret) { | |
545 | kfree(au); | |
546 | return ret; | |
547 | } | |
548 | ||
74f1869f AE |
549 | auth->authorizer = (struct ceph_authorizer *) au; |
550 | auth->authorizer_buf = au->buf->vec.iov_base; | |
551 | auth->authorizer_buf_len = au->buf->vec.iov_len; | |
552 | auth->authorizer_reply_buf = au->reply_buf; | |
553 | auth->authorizer_reply_buf_len = sizeof (au->reply_buf); | |
554 | ||
ec0994e4 SW |
555 | return 0; |
556 | } | |
557 | ||
558 | static int ceph_x_verify_authorizer_reply(struct ceph_auth_client *ac, | |
559 | struct ceph_authorizer *a, size_t len) | |
560 | { | |
561 | struct ceph_x_authorizer *au = (void *)a; | |
562 | struct ceph_x_ticket_handler *th; | |
563 | int ret = 0; | |
564 | struct ceph_x_authorize_reply reply; | |
565 | void *p = au->reply_buf; | |
566 | void *end = p + sizeof(au->reply_buf); | |
567 | ||
568 | th = get_ticket_handler(ac, au->service); | |
b545787d DC |
569 | if (IS_ERR(th)) |
570 | return PTR_ERR(th); | |
ec0994e4 SW |
571 | ret = ceph_x_decrypt(&th->session_key, &p, end, &reply, sizeof(reply)); |
572 | if (ret < 0) | |
573 | return ret; | |
574 | if (ret != sizeof(reply)) | |
575 | return -EPERM; | |
576 | ||
577 | if (au->nonce + 1 != le64_to_cpu(reply.nonce_plus_one)) | |
578 | ret = -EPERM; | |
579 | else | |
580 | ret = 0; | |
581 | dout("verify_authorizer_reply nonce %llx got %llx ret %d\n", | |
582 | au->nonce, le64_to_cpu(reply.nonce_plus_one), ret); | |
583 | return ret; | |
584 | } | |
585 | ||
586 | static void ceph_x_destroy_authorizer(struct ceph_auth_client *ac, | |
587 | struct ceph_authorizer *a) | |
588 | { | |
589 | struct ceph_x_authorizer *au = (void *)a; | |
590 | ||
591 | ceph_buffer_put(au->buf); | |
592 | kfree(au); | |
593 | } | |
594 | ||
595 | ||
596 | static void ceph_x_reset(struct ceph_auth_client *ac) | |
597 | { | |
598 | struct ceph_x_info *xi = ac->private; | |
599 | ||
600 | dout("reset\n"); | |
601 | xi->starting = true; | |
602 | xi->server_challenge = 0; | |
603 | } | |
604 | ||
605 | static void ceph_x_destroy(struct ceph_auth_client *ac) | |
606 | { | |
607 | struct ceph_x_info *xi = ac->private; | |
608 | struct rb_node *p; | |
609 | ||
610 | dout("ceph_x_destroy %p\n", ac); | |
611 | ceph_crypto_key_destroy(&xi->secret); | |
612 | ||
613 | while ((p = rb_first(&xi->ticket_handlers)) != NULL) { | |
614 | struct ceph_x_ticket_handler *th = | |
615 | rb_entry(p, struct ceph_x_ticket_handler, node); | |
616 | remove_ticket_handler(ac, th); | |
617 | } | |
618 | ||
22b1de06 SW |
619 | if (xi->auth_authorizer.buf) |
620 | ceph_buffer_put(xi->auth_authorizer.buf); | |
621 | ||
ec0994e4 SW |
622 | kfree(ac->private); |
623 | ac->private = NULL; | |
624 | } | |
625 | ||
626 | static void ceph_x_invalidate_authorizer(struct ceph_auth_client *ac, | |
627 | int peer_type) | |
628 | { | |
629 | struct ceph_x_ticket_handler *th; | |
630 | ||
631 | th = get_ticket_handler(ac, peer_type); | |
b545787d | 632 | if (!IS_ERR(th)) |
ec0994e4 SW |
633 | remove_ticket_handler(ac, th); |
634 | } | |
635 | ||
636 | ||
637 | static const struct ceph_auth_client_ops ceph_x_ops = { | |
559c1e00 | 638 | .name = "x", |
ec0994e4 | 639 | .is_authenticated = ceph_x_is_authenticated, |
a41359fa | 640 | .should_authenticate = ceph_x_should_authenticate, |
ec0994e4 SW |
641 | .build_request = ceph_x_build_request, |
642 | .handle_reply = ceph_x_handle_reply, | |
643 | .create_authorizer = ceph_x_create_authorizer, | |
644 | .verify_authorizer_reply = ceph_x_verify_authorizer_reply, | |
645 | .destroy_authorizer = ceph_x_destroy_authorizer, | |
646 | .invalidate_authorizer = ceph_x_invalidate_authorizer, | |
647 | .reset = ceph_x_reset, | |
648 | .destroy = ceph_x_destroy, | |
649 | }; | |
650 | ||
651 | ||
652 | int ceph_x_init(struct ceph_auth_client *ac) | |
653 | { | |
654 | struct ceph_x_info *xi; | |
655 | int ret; | |
656 | ||
657 | dout("ceph_x_init %p\n", ac); | |
b0930f8d | 658 | ret = -ENOMEM; |
ec0994e4 SW |
659 | xi = kzalloc(sizeof(*xi), GFP_NOFS); |
660 | if (!xi) | |
b0930f8d | 661 | goto out; |
ec0994e4 | 662 | |
ec0994e4 | 663 | ret = -EINVAL; |
8323c3aa | 664 | if (!ac->key) { |
ec0994e4 | 665 | pr_err("no secret set (for auth_x protocol)\n"); |
b0930f8d | 666 | goto out_nomem; |
ec0994e4 SW |
667 | } |
668 | ||
8323c3aa TV |
669 | ret = ceph_crypto_key_clone(&xi->secret, ac->key); |
670 | if (ret < 0) { | |
671 | pr_err("cannot clone key: %d\n", ret); | |
b0930f8d | 672 | goto out_nomem; |
8323c3aa | 673 | } |
ec0994e4 SW |
674 | |
675 | xi->starting = true; | |
676 | xi->ticket_handlers = RB_ROOT; | |
677 | ||
678 | ac->protocol = CEPH_AUTH_CEPHX; | |
679 | ac->private = xi; | |
680 | ac->ops = &ceph_x_ops; | |
681 | return 0; | |
682 | ||
b0930f8d | 683 | out_nomem: |
ec0994e4 | 684 | kfree(xi); |
b0930f8d | 685 | out: |
ec0994e4 SW |
686 | return ret; |
687 | } | |
688 | ||
689 |