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17926a79 DH |
1 | /* RxRPC key management |
2 | * | |
3 | * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | * | |
11 | * RxRPC keys should have a description of describing their purpose: | |
12 | * "afs@CAMBRIDGE.REDHAT.COM> | |
13 | */ | |
14 | ||
15 | #include <linux/module.h> | |
16 | #include <linux/net.h> | |
17 | #include <linux/skbuff.h> | |
76181c13 | 18 | #include <linux/key-type.h> |
17926a79 | 19 | #include <linux/crypto.h> |
33941284 | 20 | #include <linux/ctype.h> |
5a0e3ad6 | 21 | #include <linux/slab.h> |
17926a79 DH |
22 | #include <net/sock.h> |
23 | #include <net/af_rxrpc.h> | |
24 | #include <keys/rxrpc-type.h> | |
25 | #include <keys/user-type.h> | |
26 | #include "ar-internal.h" | |
27 | ||
28 | static int rxrpc_instantiate(struct key *, const void *, size_t); | |
29 | static int rxrpc_instantiate_s(struct key *, const void *, size_t); | |
30 | static void rxrpc_destroy(struct key *); | |
31 | static void rxrpc_destroy_s(struct key *); | |
32 | static void rxrpc_describe(const struct key *, struct seq_file *); | |
ed6dd18b | 33 | static long rxrpc_read(const struct key *, char __user *, size_t); |
17926a79 DH |
34 | |
35 | /* | |
36 | * rxrpc defined keys take an arbitrary string as the description and an | |
37 | * arbitrary blob of data as the payload | |
38 | */ | |
39 | struct key_type key_type_rxrpc = { | |
40 | .name = "rxrpc", | |
41 | .instantiate = rxrpc_instantiate, | |
42 | .match = user_match, | |
43 | .destroy = rxrpc_destroy, | |
44 | .describe = rxrpc_describe, | |
ed6dd18b | 45 | .read = rxrpc_read, |
17926a79 | 46 | }; |
17926a79 DH |
47 | EXPORT_SYMBOL(key_type_rxrpc); |
48 | ||
49 | /* | |
50 | * rxrpc server defined keys take "<serviceId>:<securityIndex>" as the | |
51 | * description and an 8-byte decryption key as the payload | |
52 | */ | |
53 | struct key_type key_type_rxrpc_s = { | |
54 | .name = "rxrpc_s", | |
55 | .instantiate = rxrpc_instantiate_s, | |
56 | .match = user_match, | |
57 | .destroy = rxrpc_destroy_s, | |
58 | .describe = rxrpc_describe, | |
59 | }; | |
60 | ||
33941284 DH |
61 | /* |
62 | * parse an RxKAD type XDR format token | |
63 | * - the caller guarantees we have at least 4 words | |
64 | */ | |
65 | static int rxrpc_instantiate_xdr_rxkad(struct key *key, const __be32 *xdr, | |
66 | unsigned toklen) | |
67 | { | |
99455153 | 68 | struct rxrpc_key_token *token, **pptoken; |
33941284 DH |
69 | size_t plen; |
70 | u32 tktlen; | |
71 | int ret; | |
72 | ||
73 | _enter(",{%x,%x,%x,%x},%u", | |
74 | ntohl(xdr[0]), ntohl(xdr[1]), ntohl(xdr[2]), ntohl(xdr[3]), | |
75 | toklen); | |
76 | ||
77 | if (toklen <= 8 * 4) | |
78 | return -EKEYREJECTED; | |
79 | tktlen = ntohl(xdr[7]); | |
80 | _debug("tktlen: %x", tktlen); | |
81 | if (tktlen > AFSTOKEN_RK_TIX_MAX) | |
82 | return -EKEYREJECTED; | |
83 | if (8 * 4 + tktlen != toklen) | |
84 | return -EKEYREJECTED; | |
85 | ||
86 | plen = sizeof(*token) + sizeof(*token->kad) + tktlen; | |
87 | ret = key_payload_reserve(key, key->datalen + plen); | |
88 | if (ret < 0) | |
89 | return ret; | |
90 | ||
91 | plen -= sizeof(*token); | |
92 | token = kmalloc(sizeof(*token), GFP_KERNEL); | |
93 | if (!token) | |
94 | return -ENOMEM; | |
95 | ||
96 | token->kad = kmalloc(plen, GFP_KERNEL); | |
97 | if (!token->kad) { | |
98 | kfree(token); | |
99 | return -ENOMEM; | |
100 | } | |
101 | ||
102 | token->security_index = RXRPC_SECURITY_RXKAD; | |
103 | token->kad->ticket_len = tktlen; | |
104 | token->kad->vice_id = ntohl(xdr[0]); | |
105 | token->kad->kvno = ntohl(xdr[1]); | |
106 | token->kad->start = ntohl(xdr[4]); | |
107 | token->kad->expiry = ntohl(xdr[5]); | |
108 | token->kad->primary_flag = ntohl(xdr[6]); | |
109 | memcpy(&token->kad->session_key, &xdr[2], 8); | |
110 | memcpy(&token->kad->ticket, &xdr[8], tktlen); | |
111 | ||
112 | _debug("SCIX: %u", token->security_index); | |
113 | _debug("TLEN: %u", token->kad->ticket_len); | |
114 | _debug("EXPY: %x", token->kad->expiry); | |
115 | _debug("KVNO: %u", token->kad->kvno); | |
116 | _debug("PRIM: %u", token->kad->primary_flag); | |
117 | _debug("SKEY: %02x%02x%02x%02x%02x%02x%02x%02x", | |
118 | token->kad->session_key[0], token->kad->session_key[1], | |
119 | token->kad->session_key[2], token->kad->session_key[3], | |
120 | token->kad->session_key[4], token->kad->session_key[5], | |
121 | token->kad->session_key[6], token->kad->session_key[7]); | |
122 | if (token->kad->ticket_len >= 8) | |
123 | _debug("TCKT: %02x%02x%02x%02x%02x%02x%02x%02x", | |
124 | token->kad->ticket[0], token->kad->ticket[1], | |
125 | token->kad->ticket[2], token->kad->ticket[3], | |
126 | token->kad->ticket[4], token->kad->ticket[5], | |
127 | token->kad->ticket[6], token->kad->ticket[7]); | |
128 | ||
129 | /* count the number of tokens attached */ | |
130 | key->type_data.x[0]++; | |
131 | ||
132 | /* attach the data */ | |
99455153 DH |
133 | for (pptoken = (struct rxrpc_key_token **)&key->payload.data; |
134 | *pptoken; | |
135 | pptoken = &(*pptoken)->next) | |
136 | continue; | |
137 | *pptoken = token; | |
138 | if (token->kad->expiry < key->expiry) | |
139 | key->expiry = token->kad->expiry; | |
140 | ||
141 | _leave(" = 0"); | |
142 | return 0; | |
143 | } | |
144 | ||
145 | static void rxrpc_free_krb5_principal(struct krb5_principal *princ) | |
146 | { | |
147 | int loop; | |
148 | ||
149 | if (princ->name_parts) { | |
150 | for (loop = princ->n_name_parts - 1; loop >= 0; loop--) | |
151 | kfree(princ->name_parts[loop]); | |
152 | kfree(princ->name_parts); | |
153 | } | |
154 | kfree(princ->realm); | |
155 | } | |
156 | ||
157 | static void rxrpc_free_krb5_tagged(struct krb5_tagged_data *td) | |
158 | { | |
159 | kfree(td->data); | |
160 | } | |
161 | ||
162 | /* | |
163 | * free up an RxK5 token | |
164 | */ | |
165 | static void rxrpc_rxk5_free(struct rxk5_key *rxk5) | |
166 | { | |
167 | int loop; | |
168 | ||
169 | rxrpc_free_krb5_principal(&rxk5->client); | |
170 | rxrpc_free_krb5_principal(&rxk5->server); | |
171 | rxrpc_free_krb5_tagged(&rxk5->session); | |
172 | ||
173 | if (rxk5->addresses) { | |
174 | for (loop = rxk5->n_addresses - 1; loop >= 0; loop--) | |
175 | rxrpc_free_krb5_tagged(&rxk5->addresses[loop]); | |
176 | kfree(rxk5->addresses); | |
177 | } | |
178 | if (rxk5->authdata) { | |
179 | for (loop = rxk5->n_authdata - 1; loop >= 0; loop--) | |
180 | rxrpc_free_krb5_tagged(&rxk5->authdata[loop]); | |
181 | kfree(rxk5->authdata); | |
182 | } | |
183 | ||
184 | kfree(rxk5->ticket); | |
185 | kfree(rxk5->ticket2); | |
186 | kfree(rxk5); | |
187 | } | |
188 | ||
189 | /* | |
190 | * extract a krb5 principal | |
191 | */ | |
192 | static int rxrpc_krb5_decode_principal(struct krb5_principal *princ, | |
193 | const __be32 **_xdr, | |
194 | unsigned *_toklen) | |
195 | { | |
196 | const __be32 *xdr = *_xdr; | |
197 | unsigned toklen = *_toklen, n_parts, loop, tmp; | |
198 | ||
199 | /* there must be at least one name, and at least #names+1 length | |
200 | * words */ | |
201 | if (toklen <= 12) | |
202 | return -EINVAL; | |
203 | ||
204 | _enter(",{%x,%x,%x},%u", | |
205 | ntohl(xdr[0]), ntohl(xdr[1]), ntohl(xdr[2]), toklen); | |
206 | ||
207 | n_parts = ntohl(*xdr++); | |
208 | toklen -= 4; | |
209 | if (n_parts <= 0 || n_parts > AFSTOKEN_K5_COMPONENTS_MAX) | |
210 | return -EINVAL; | |
211 | princ->n_name_parts = n_parts; | |
212 | ||
213 | if (toklen <= (n_parts + 1) * 4) | |
214 | return -EINVAL; | |
215 | ||
216 | princ->name_parts = kcalloc(sizeof(char *), n_parts, GFP_KERNEL); | |
217 | if (!princ->name_parts) | |
218 | return -ENOMEM; | |
219 | ||
220 | for (loop = 0; loop < n_parts; loop++) { | |
221 | if (toklen < 4) | |
222 | return -EINVAL; | |
223 | tmp = ntohl(*xdr++); | |
224 | toklen -= 4; | |
225 | if (tmp <= 0 || tmp > AFSTOKEN_STRING_MAX) | |
226 | return -EINVAL; | |
227 | if (tmp > toklen) | |
228 | return -EINVAL; | |
229 | princ->name_parts[loop] = kmalloc(tmp + 1, GFP_KERNEL); | |
230 | if (!princ->name_parts[loop]) | |
231 | return -ENOMEM; | |
232 | memcpy(princ->name_parts[loop], xdr, tmp); | |
233 | princ->name_parts[loop][tmp] = 0; | |
234 | tmp = (tmp + 3) & ~3; | |
235 | toklen -= tmp; | |
236 | xdr += tmp >> 2; | |
237 | } | |
238 | ||
239 | if (toklen < 4) | |
240 | return -EINVAL; | |
241 | tmp = ntohl(*xdr++); | |
242 | toklen -= 4; | |
243 | if (tmp <= 0 || tmp > AFSTOKEN_K5_REALM_MAX) | |
244 | return -EINVAL; | |
245 | if (tmp > toklen) | |
246 | return -EINVAL; | |
247 | princ->realm = kmalloc(tmp + 1, GFP_KERNEL); | |
248 | if (!princ->realm) | |
249 | return -ENOMEM; | |
250 | memcpy(princ->realm, xdr, tmp); | |
251 | princ->realm[tmp] = 0; | |
252 | tmp = (tmp + 3) & ~3; | |
253 | toklen -= tmp; | |
254 | xdr += tmp >> 2; | |
255 | ||
256 | _debug("%s/...@%s", princ->name_parts[0], princ->realm); | |
257 | ||
258 | *_xdr = xdr; | |
259 | *_toklen = toklen; | |
260 | _leave(" = 0 [toklen=%u]", toklen); | |
261 | return 0; | |
262 | } | |
263 | ||
264 | /* | |
265 | * extract a piece of krb5 tagged data | |
266 | */ | |
267 | static int rxrpc_krb5_decode_tagged_data(struct krb5_tagged_data *td, | |
268 | size_t max_data_size, | |
269 | const __be32 **_xdr, | |
270 | unsigned *_toklen) | |
271 | { | |
272 | const __be32 *xdr = *_xdr; | |
273 | unsigned toklen = *_toklen, len; | |
274 | ||
275 | /* there must be at least one tag and one length word */ | |
276 | if (toklen <= 8) | |
277 | return -EINVAL; | |
278 | ||
279 | _enter(",%zu,{%x,%x},%u", | |
280 | max_data_size, ntohl(xdr[0]), ntohl(xdr[1]), toklen); | |
281 | ||
282 | td->tag = ntohl(*xdr++); | |
283 | len = ntohl(*xdr++); | |
284 | toklen -= 8; | |
285 | if (len > max_data_size) | |
286 | return -EINVAL; | |
287 | td->data_len = len; | |
288 | ||
289 | if (len > 0) { | |
290 | td->data = kmalloc(len, GFP_KERNEL); | |
291 | if (!td->data) | |
292 | return -ENOMEM; | |
293 | memcpy(td->data, xdr, len); | |
294 | len = (len + 3) & ~3; | |
295 | toklen -= len; | |
296 | xdr += len >> 2; | |
297 | } | |
298 | ||
299 | _debug("tag %x len %x", td->tag, td->data_len); | |
300 | ||
301 | *_xdr = xdr; | |
302 | *_toklen = toklen; | |
303 | _leave(" = 0 [toklen=%u]", toklen); | |
304 | return 0; | |
305 | } | |
306 | ||
307 | /* | |
308 | * extract an array of tagged data | |
309 | */ | |
310 | static int rxrpc_krb5_decode_tagged_array(struct krb5_tagged_data **_td, | |
311 | u8 *_n_elem, | |
312 | u8 max_n_elem, | |
313 | size_t max_elem_size, | |
314 | const __be32 **_xdr, | |
315 | unsigned *_toklen) | |
316 | { | |
317 | struct krb5_tagged_data *td; | |
318 | const __be32 *xdr = *_xdr; | |
319 | unsigned toklen = *_toklen, n_elem, loop; | |
320 | int ret; | |
321 | ||
322 | /* there must be at least one count */ | |
323 | if (toklen < 4) | |
324 | return -EINVAL; | |
325 | ||
326 | _enter(",,%u,%zu,{%x},%u", | |
327 | max_n_elem, max_elem_size, ntohl(xdr[0]), toklen); | |
328 | ||
329 | n_elem = ntohl(*xdr++); | |
330 | toklen -= 4; | |
331 | if (n_elem < 0 || n_elem > max_n_elem) | |
332 | return -EINVAL; | |
333 | *_n_elem = n_elem; | |
334 | if (n_elem > 0) { | |
335 | if (toklen <= (n_elem + 1) * 4) | |
336 | return -EINVAL; | |
337 | ||
338 | _debug("n_elem %d", n_elem); | |
339 | ||
340 | td = kcalloc(sizeof(struct krb5_tagged_data), n_elem, | |
341 | GFP_KERNEL); | |
342 | if (!td) | |
343 | return -ENOMEM; | |
344 | *_td = td; | |
345 | ||
346 | for (loop = 0; loop < n_elem; loop++) { | |
347 | ret = rxrpc_krb5_decode_tagged_data(&td[loop], | |
348 | max_elem_size, | |
349 | &xdr, &toklen); | |
350 | if (ret < 0) | |
351 | return ret; | |
352 | } | |
353 | } | |
354 | ||
355 | *_xdr = xdr; | |
356 | *_toklen = toklen; | |
357 | _leave(" = 0 [toklen=%u]", toklen); | |
358 | return 0; | |
359 | } | |
360 | ||
361 | /* | |
362 | * extract a krb5 ticket | |
363 | */ | |
4e36a95e | 364 | static int rxrpc_krb5_decode_ticket(u8 **_ticket, u16 *_tktlen, |
99455153 DH |
365 | const __be32 **_xdr, unsigned *_toklen) |
366 | { | |
367 | const __be32 *xdr = *_xdr; | |
368 | unsigned toklen = *_toklen, len; | |
369 | ||
370 | /* there must be at least one length word */ | |
371 | if (toklen <= 4) | |
372 | return -EINVAL; | |
373 | ||
374 | _enter(",{%x},%u", ntohl(xdr[0]), toklen); | |
375 | ||
376 | len = ntohl(*xdr++); | |
377 | toklen -= 4; | |
378 | if (len > AFSTOKEN_K5_TIX_MAX) | |
379 | return -EINVAL; | |
380 | *_tktlen = len; | |
381 | ||
382 | _debug("ticket len %u", len); | |
383 | ||
384 | if (len > 0) { | |
385 | *_ticket = kmalloc(len, GFP_KERNEL); | |
386 | if (!*_ticket) | |
387 | return -ENOMEM; | |
388 | memcpy(*_ticket, xdr, len); | |
389 | len = (len + 3) & ~3; | |
390 | toklen -= len; | |
391 | xdr += len >> 2; | |
392 | } | |
393 | ||
394 | *_xdr = xdr; | |
395 | *_toklen = toklen; | |
396 | _leave(" = 0 [toklen=%u]", toklen); | |
397 | return 0; | |
398 | } | |
399 | ||
400 | /* | |
401 | * parse an RxK5 type XDR format token | |
402 | * - the caller guarantees we have at least 4 words | |
403 | */ | |
404 | static int rxrpc_instantiate_xdr_rxk5(struct key *key, const __be32 *xdr, | |
405 | unsigned toklen) | |
406 | { | |
407 | struct rxrpc_key_token *token, **pptoken; | |
408 | struct rxk5_key *rxk5; | |
409 | const __be32 *end_xdr = xdr + (toklen >> 2); | |
410 | int ret; | |
411 | ||
412 | _enter(",{%x,%x,%x,%x},%u", | |
413 | ntohl(xdr[0]), ntohl(xdr[1]), ntohl(xdr[2]), ntohl(xdr[3]), | |
414 | toklen); | |
415 | ||
416 | /* reserve some payload space for this subkey - the length of the token | |
417 | * is a reasonable approximation */ | |
418 | ret = key_payload_reserve(key, key->datalen + toklen); | |
419 | if (ret < 0) | |
420 | return ret; | |
421 | ||
422 | token = kzalloc(sizeof(*token), GFP_KERNEL); | |
423 | if (!token) | |
424 | return -ENOMEM; | |
425 | ||
426 | rxk5 = kzalloc(sizeof(*rxk5), GFP_KERNEL); | |
427 | if (!rxk5) { | |
428 | kfree(token); | |
429 | return -ENOMEM; | |
430 | } | |
431 | ||
432 | token->security_index = RXRPC_SECURITY_RXK5; | |
433 | token->k5 = rxk5; | |
434 | ||
435 | /* extract the principals */ | |
436 | ret = rxrpc_krb5_decode_principal(&rxk5->client, &xdr, &toklen); | |
437 | if (ret < 0) | |
438 | goto error; | |
439 | ret = rxrpc_krb5_decode_principal(&rxk5->server, &xdr, &toklen); | |
440 | if (ret < 0) | |
441 | goto error; | |
442 | ||
443 | /* extract the session key and the encoding type (the tag field -> | |
444 | * ENCTYPE_xxx) */ | |
445 | ret = rxrpc_krb5_decode_tagged_data(&rxk5->session, AFSTOKEN_DATA_MAX, | |
446 | &xdr, &toklen); | |
447 | if (ret < 0) | |
448 | goto error; | |
449 | ||
450 | if (toklen < 4 * 8 + 2 * 4) | |
451 | goto inval; | |
452 | rxk5->authtime = be64_to_cpup((const __be64 *) xdr); | |
453 | xdr += 2; | |
454 | rxk5->starttime = be64_to_cpup((const __be64 *) xdr); | |
455 | xdr += 2; | |
456 | rxk5->endtime = be64_to_cpup((const __be64 *) xdr); | |
457 | xdr += 2; | |
458 | rxk5->renew_till = be64_to_cpup((const __be64 *) xdr); | |
459 | xdr += 2; | |
460 | rxk5->is_skey = ntohl(*xdr++); | |
461 | rxk5->flags = ntohl(*xdr++); | |
462 | toklen -= 4 * 8 + 2 * 4; | |
463 | ||
464 | _debug("times: a=%llx s=%llx e=%llx rt=%llx", | |
465 | rxk5->authtime, rxk5->starttime, rxk5->endtime, | |
466 | rxk5->renew_till); | |
467 | _debug("is_skey=%x flags=%x", rxk5->is_skey, rxk5->flags); | |
468 | ||
469 | /* extract the permitted client addresses */ | |
470 | ret = rxrpc_krb5_decode_tagged_array(&rxk5->addresses, | |
471 | &rxk5->n_addresses, | |
472 | AFSTOKEN_K5_ADDRESSES_MAX, | |
473 | AFSTOKEN_DATA_MAX, | |
474 | &xdr, &toklen); | |
475 | if (ret < 0) | |
476 | goto error; | |
477 | ||
478 | ASSERTCMP((end_xdr - xdr) << 2, ==, toklen); | |
479 | ||
480 | /* extract the tickets */ | |
481 | ret = rxrpc_krb5_decode_ticket(&rxk5->ticket, &rxk5->ticket_len, | |
482 | &xdr, &toklen); | |
483 | if (ret < 0) | |
484 | goto error; | |
485 | ret = rxrpc_krb5_decode_ticket(&rxk5->ticket2, &rxk5->ticket2_len, | |
486 | &xdr, &toklen); | |
487 | if (ret < 0) | |
488 | goto error; | |
489 | ||
490 | ASSERTCMP((end_xdr - xdr) << 2, ==, toklen); | |
491 | ||
492 | /* extract the typed auth data */ | |
493 | ret = rxrpc_krb5_decode_tagged_array(&rxk5->authdata, | |
494 | &rxk5->n_authdata, | |
495 | AFSTOKEN_K5_AUTHDATA_MAX, | |
496 | AFSTOKEN_BDATALN_MAX, | |
497 | &xdr, &toklen); | |
498 | if (ret < 0) | |
499 | goto error; | |
500 | ||
501 | ASSERTCMP((end_xdr - xdr) << 2, ==, toklen); | |
502 | ||
503 | if (toklen != 0) | |
504 | goto inval; | |
505 | ||
506 | /* attach the payload to the key */ | |
507 | for (pptoken = (struct rxrpc_key_token **)&key->payload.data; | |
508 | *pptoken; | |
509 | pptoken = &(*pptoken)->next) | |
510 | continue; | |
511 | *pptoken = token; | |
33941284 DH |
512 | if (token->kad->expiry < key->expiry) |
513 | key->expiry = token->kad->expiry; | |
514 | ||
515 | _leave(" = 0"); | |
516 | return 0; | |
99455153 DH |
517 | |
518 | inval: | |
519 | ret = -EINVAL; | |
520 | error: | |
521 | rxrpc_rxk5_free(rxk5); | |
522 | kfree(token); | |
523 | _leave(" = %d", ret); | |
524 | return ret; | |
33941284 DH |
525 | } |
526 | ||
527 | /* | |
528 | * attempt to parse the data as the XDR format | |
529 | * - the caller guarantees we have more than 7 words | |
530 | */ | |
531 | static int rxrpc_instantiate_xdr(struct key *key, const void *data, size_t datalen) | |
532 | { | |
533 | const __be32 *xdr = data, *token; | |
534 | const char *cp; | |
535 | unsigned len, tmp, loop, ntoken, toklen, sec_ix; | |
536 | int ret; | |
537 | ||
538 | _enter(",{%x,%x,%x,%x},%zu", | |
539 | ntohl(xdr[0]), ntohl(xdr[1]), ntohl(xdr[2]), ntohl(xdr[3]), | |
540 | datalen); | |
541 | ||
542 | if (datalen > AFSTOKEN_LENGTH_MAX) | |
543 | goto not_xdr; | |
544 | ||
545 | /* XDR is an array of __be32's */ | |
546 | if (datalen & 3) | |
547 | goto not_xdr; | |
548 | ||
549 | /* the flags should be 0 (the setpag bit must be handled by | |
550 | * userspace) */ | |
551 | if (ntohl(*xdr++) != 0) | |
552 | goto not_xdr; | |
553 | datalen -= 4; | |
554 | ||
555 | /* check the cell name */ | |
556 | len = ntohl(*xdr++); | |
557 | if (len < 1 || len > AFSTOKEN_CELL_MAX) | |
558 | goto not_xdr; | |
559 | datalen -= 4; | |
560 | tmp = (len + 3) & ~3; | |
561 | if (tmp > datalen) | |
562 | goto not_xdr; | |
563 | ||
564 | cp = (const char *) xdr; | |
565 | for (loop = 0; loop < len; loop++) | |
566 | if (!isprint(cp[loop])) | |
567 | goto not_xdr; | |
568 | if (len < tmp) | |
569 | for (; loop < tmp; loop++) | |
570 | if (cp[loop]) | |
571 | goto not_xdr; | |
572 | _debug("cellname: [%u/%u] '%*.*s'", | |
573 | len, tmp, len, len, (const char *) xdr); | |
574 | datalen -= tmp; | |
575 | xdr += tmp >> 2; | |
576 | ||
577 | /* get the token count */ | |
578 | if (datalen < 12) | |
579 | goto not_xdr; | |
580 | ntoken = ntohl(*xdr++); | |
581 | datalen -= 4; | |
582 | _debug("ntoken: %x", ntoken); | |
583 | if (ntoken < 1 || ntoken > AFSTOKEN_MAX) | |
584 | goto not_xdr; | |
585 | ||
586 | /* check each token wrapper */ | |
587 | token = xdr; | |
588 | loop = ntoken; | |
589 | do { | |
590 | if (datalen < 8) | |
591 | goto not_xdr; | |
592 | toklen = ntohl(*xdr++); | |
593 | sec_ix = ntohl(*xdr); | |
594 | datalen -= 4; | |
595 | _debug("token: [%x/%zx] %x", toklen, datalen, sec_ix); | |
596 | if (toklen < 20 || toklen > datalen) | |
597 | goto not_xdr; | |
598 | datalen -= (toklen + 3) & ~3; | |
599 | xdr += (toklen + 3) >> 2; | |
600 | ||
601 | } while (--loop > 0); | |
602 | ||
603 | _debug("remainder: %zu", datalen); | |
604 | if (datalen != 0) | |
605 | goto not_xdr; | |
606 | ||
607 | /* okay: we're going to assume it's valid XDR format | |
608 | * - we ignore the cellname, relying on the key to be correctly named | |
609 | */ | |
610 | do { | |
611 | xdr = token; | |
612 | toklen = ntohl(*xdr++); | |
613 | token = xdr + ((toklen + 3) >> 2); | |
614 | sec_ix = ntohl(*xdr++); | |
615 | toklen -= 4; | |
616 | ||
99455153 DH |
617 | _debug("TOKEN type=%u [%p-%p]", sec_ix, xdr, token); |
618 | ||
33941284 DH |
619 | switch (sec_ix) { |
620 | case RXRPC_SECURITY_RXKAD: | |
621 | ret = rxrpc_instantiate_xdr_rxkad(key, xdr, toklen); | |
622 | if (ret != 0) | |
623 | goto error; | |
624 | break; | |
625 | ||
99455153 DH |
626 | case RXRPC_SECURITY_RXK5: |
627 | ret = rxrpc_instantiate_xdr_rxk5(key, xdr, toklen); | |
628 | if (ret != 0) | |
629 | goto error; | |
630 | break; | |
631 | ||
33941284 DH |
632 | default: |
633 | ret = -EPROTONOSUPPORT; | |
634 | goto error; | |
635 | } | |
636 | ||
637 | } while (--ntoken > 0); | |
638 | ||
639 | _leave(" = 0"); | |
640 | return 0; | |
641 | ||
642 | not_xdr: | |
643 | _leave(" = -EPROTO"); | |
644 | return -EPROTO; | |
645 | error: | |
646 | _leave(" = %d", ret); | |
647 | return ret; | |
648 | } | |
649 | ||
17926a79 DH |
650 | /* |
651 | * instantiate an rxrpc defined key | |
652 | * data should be of the form: | |
653 | * OFFSET LEN CONTENT | |
654 | * 0 4 key interface version number | |
655 | * 4 2 security index (type) | |
656 | * 6 2 ticket length | |
657 | * 8 4 key expiry time (time_t) | |
658 | * 12 4 kvno | |
659 | * 16 8 session key | |
660 | * 24 [len] ticket | |
661 | * | |
662 | * if no data is provided, then a no-security key is made | |
663 | */ | |
664 | static int rxrpc_instantiate(struct key *key, const void *data, size_t datalen) | |
665 | { | |
33941284 DH |
666 | const struct rxrpc_key_data_v1 *v1; |
667 | struct rxrpc_key_token *token, **pp; | |
17926a79 DH |
668 | size_t plen; |
669 | u32 kver; | |
670 | int ret; | |
671 | ||
672 | _enter("{%x},,%zu", key_serial(key), datalen); | |
673 | ||
674 | /* handle a no-security key */ | |
675 | if (!data && datalen == 0) | |
676 | return 0; | |
677 | ||
33941284 DH |
678 | /* determine if the XDR payload format is being used */ |
679 | if (datalen > 7 * 4) { | |
680 | ret = rxrpc_instantiate_xdr(key, data, datalen); | |
681 | if (ret != -EPROTO) | |
682 | return ret; | |
683 | } | |
684 | ||
17926a79 DH |
685 | /* get the key interface version number */ |
686 | ret = -EINVAL; | |
687 | if (datalen <= 4 || !data) | |
688 | goto error; | |
689 | memcpy(&kver, data, sizeof(kver)); | |
690 | data += sizeof(kver); | |
691 | datalen -= sizeof(kver); | |
692 | ||
693 | _debug("KEY I/F VERSION: %u", kver); | |
694 | ||
695 | ret = -EKEYREJECTED; | |
696 | if (kver != 1) | |
697 | goto error; | |
698 | ||
699 | /* deal with a version 1 key */ | |
700 | ret = -EINVAL; | |
33941284 | 701 | if (datalen < sizeof(*v1)) |
17926a79 DH |
702 | goto error; |
703 | ||
33941284 DH |
704 | v1 = data; |
705 | if (datalen != sizeof(*v1) + v1->ticket_length) | |
17926a79 DH |
706 | goto error; |
707 | ||
33941284 DH |
708 | _debug("SCIX: %u", v1->security_index); |
709 | _debug("TLEN: %u", v1->ticket_length); | |
710 | _debug("EXPY: %x", v1->expiry); | |
711 | _debug("KVNO: %u", v1->kvno); | |
17926a79 | 712 | _debug("SKEY: %02x%02x%02x%02x%02x%02x%02x%02x", |
33941284 DH |
713 | v1->session_key[0], v1->session_key[1], |
714 | v1->session_key[2], v1->session_key[3], | |
715 | v1->session_key[4], v1->session_key[5], | |
716 | v1->session_key[6], v1->session_key[7]); | |
717 | if (v1->ticket_length >= 8) | |
17926a79 | 718 | _debug("TCKT: %02x%02x%02x%02x%02x%02x%02x%02x", |
33941284 DH |
719 | v1->ticket[0], v1->ticket[1], |
720 | v1->ticket[2], v1->ticket[3], | |
721 | v1->ticket[4], v1->ticket[5], | |
722 | v1->ticket[6], v1->ticket[7]); | |
17926a79 DH |
723 | |
724 | ret = -EPROTONOSUPPORT; | |
33941284 | 725 | if (v1->security_index != RXRPC_SECURITY_RXKAD) |
17926a79 DH |
726 | goto error; |
727 | ||
33941284 DH |
728 | plen = sizeof(*token->kad) + v1->ticket_length; |
729 | ret = key_payload_reserve(key, plen + sizeof(*token)); | |
17926a79 DH |
730 | if (ret < 0) |
731 | goto error; | |
732 | ||
733 | ret = -ENOMEM; | |
33941284 DH |
734 | token = kmalloc(sizeof(*token), GFP_KERNEL); |
735 | if (!token) | |
17926a79 | 736 | goto error; |
33941284 DH |
737 | token->kad = kmalloc(plen, GFP_KERNEL); |
738 | if (!token->kad) | |
739 | goto error_free; | |
740 | ||
741 | token->security_index = RXRPC_SECURITY_RXKAD; | |
742 | token->kad->ticket_len = v1->ticket_length; | |
743 | token->kad->expiry = v1->expiry; | |
744 | token->kad->kvno = v1->kvno; | |
745 | memcpy(&token->kad->session_key, &v1->session_key, 8); | |
746 | memcpy(&token->kad->ticket, v1->ticket, v1->ticket_length); | |
17926a79 DH |
747 | |
748 | /* attach the data */ | |
33941284 DH |
749 | key->type_data.x[0]++; |
750 | ||
751 | pp = (struct rxrpc_key_token **)&key->payload.data; | |
752 | while (*pp) | |
753 | pp = &(*pp)->next; | |
754 | *pp = token; | |
755 | if (token->kad->expiry < key->expiry) | |
756 | key->expiry = token->kad->expiry; | |
757 | token = NULL; | |
17926a79 DH |
758 | ret = 0; |
759 | ||
33941284 DH |
760 | error_free: |
761 | kfree(token); | |
17926a79 DH |
762 | error: |
763 | return ret; | |
764 | } | |
765 | ||
766 | /* | |
767 | * instantiate a server secret key | |
768 | * data should be a pointer to the 8-byte secret key | |
769 | */ | |
770 | static int rxrpc_instantiate_s(struct key *key, const void *data, | |
771 | size_t datalen) | |
772 | { | |
773 | struct crypto_blkcipher *ci; | |
774 | ||
775 | _enter("{%x},,%zu", key_serial(key), datalen); | |
776 | ||
777 | if (datalen != 8) | |
778 | return -EINVAL; | |
779 | ||
780 | memcpy(&key->type_data, data, 8); | |
781 | ||
782 | ci = crypto_alloc_blkcipher("pcbc(des)", 0, CRYPTO_ALG_ASYNC); | |
783 | if (IS_ERR(ci)) { | |
784 | _leave(" = %ld", PTR_ERR(ci)); | |
785 | return PTR_ERR(ci); | |
786 | } | |
787 | ||
788 | if (crypto_blkcipher_setkey(ci, data, 8) < 0) | |
789 | BUG(); | |
790 | ||
791 | key->payload.data = ci; | |
792 | _leave(" = 0"); | |
793 | return 0; | |
794 | } | |
795 | ||
796 | /* | |
797 | * dispose of the data dangling from the corpse of a rxrpc key | |
798 | */ | |
799 | static void rxrpc_destroy(struct key *key) | |
800 | { | |
33941284 DH |
801 | struct rxrpc_key_token *token; |
802 | ||
803 | while ((token = key->payload.data)) { | |
804 | key->payload.data = token->next; | |
805 | switch (token->security_index) { | |
806 | case RXRPC_SECURITY_RXKAD: | |
807 | kfree(token->kad); | |
808 | break; | |
99455153 DH |
809 | case RXRPC_SECURITY_RXK5: |
810 | if (token->k5) | |
811 | rxrpc_rxk5_free(token->k5); | |
812 | break; | |
33941284 DH |
813 | default: |
814 | printk(KERN_ERR "Unknown token type %x on rxrpc key\n", | |
815 | token->security_index); | |
816 | BUG(); | |
817 | } | |
818 | ||
819 | kfree(token); | |
820 | } | |
17926a79 DH |
821 | } |
822 | ||
823 | /* | |
824 | * dispose of the data dangling from the corpse of a rxrpc key | |
825 | */ | |
826 | static void rxrpc_destroy_s(struct key *key) | |
827 | { | |
828 | if (key->payload.data) { | |
829 | crypto_free_blkcipher(key->payload.data); | |
830 | key->payload.data = NULL; | |
831 | } | |
832 | } | |
833 | ||
834 | /* | |
835 | * describe the rxrpc key | |
836 | */ | |
837 | static void rxrpc_describe(const struct key *key, struct seq_file *m) | |
838 | { | |
839 | seq_puts(m, key->description); | |
840 | } | |
841 | ||
842 | /* | |
843 | * grab the security key for a socket | |
844 | */ | |
845 | int rxrpc_request_key(struct rxrpc_sock *rx, char __user *optval, int optlen) | |
846 | { | |
847 | struct key *key; | |
848 | char *description; | |
849 | ||
850 | _enter(""); | |
851 | ||
852 | if (optlen <= 0 || optlen > PAGE_SIZE - 1) | |
853 | return -EINVAL; | |
854 | ||
855 | description = kmalloc(optlen + 1, GFP_KERNEL); | |
856 | if (!description) | |
857 | return -ENOMEM; | |
858 | ||
859 | if (copy_from_user(description, optval, optlen)) { | |
860 | kfree(description); | |
861 | return -EFAULT; | |
862 | } | |
863 | description[optlen] = 0; | |
864 | ||
865 | key = request_key(&key_type_rxrpc, description, NULL); | |
866 | if (IS_ERR(key)) { | |
867 | kfree(description); | |
868 | _leave(" = %ld", PTR_ERR(key)); | |
869 | return PTR_ERR(key); | |
870 | } | |
871 | ||
872 | rx->key = key; | |
873 | kfree(description); | |
874 | _leave(" = 0 [key %x]", key->serial); | |
875 | return 0; | |
876 | } | |
877 | ||
878 | /* | |
879 | * grab the security keyring for a server socket | |
880 | */ | |
881 | int rxrpc_server_keyring(struct rxrpc_sock *rx, char __user *optval, | |
882 | int optlen) | |
883 | { | |
884 | struct key *key; | |
885 | char *description; | |
886 | ||
887 | _enter(""); | |
888 | ||
889 | if (optlen <= 0 || optlen > PAGE_SIZE - 1) | |
890 | return -EINVAL; | |
891 | ||
892 | description = kmalloc(optlen + 1, GFP_KERNEL); | |
893 | if (!description) | |
894 | return -ENOMEM; | |
895 | ||
896 | if (copy_from_user(description, optval, optlen)) { | |
897 | kfree(description); | |
898 | return -EFAULT; | |
899 | } | |
900 | description[optlen] = 0; | |
901 | ||
902 | key = request_key(&key_type_keyring, description, NULL); | |
903 | if (IS_ERR(key)) { | |
904 | kfree(description); | |
905 | _leave(" = %ld", PTR_ERR(key)); | |
906 | return PTR_ERR(key); | |
907 | } | |
908 | ||
909 | rx->securities = key; | |
910 | kfree(description); | |
911 | _leave(" = 0 [key %x]", key->serial); | |
912 | return 0; | |
913 | } | |
914 | ||
915 | /* | |
916 | * generate a server data key | |
917 | */ | |
918 | int rxrpc_get_server_data_key(struct rxrpc_connection *conn, | |
919 | const void *session_key, | |
920 | time_t expiry, | |
921 | u32 kvno) | |
922 | { | |
d84f4f99 | 923 | const struct cred *cred = current_cred(); |
17926a79 DH |
924 | struct key *key; |
925 | int ret; | |
926 | ||
927 | struct { | |
928 | u32 kver; | |
33941284 | 929 | struct rxrpc_key_data_v1 v1; |
17926a79 DH |
930 | } data; |
931 | ||
932 | _enter(""); | |
933 | ||
d84f4f99 | 934 | key = key_alloc(&key_type_rxrpc, "x", 0, 0, cred, 0, |
17926a79 DH |
935 | KEY_ALLOC_NOT_IN_QUOTA); |
936 | if (IS_ERR(key)) { | |
937 | _leave(" = -ENOMEM [alloc %ld]", PTR_ERR(key)); | |
938 | return -ENOMEM; | |
939 | } | |
940 | ||
941 | _debug("key %d", key_serial(key)); | |
942 | ||
943 | data.kver = 1; | |
33941284 DH |
944 | data.v1.security_index = RXRPC_SECURITY_RXKAD; |
945 | data.v1.ticket_length = 0; | |
946 | data.v1.expiry = expiry; | |
947 | data.v1.kvno = 0; | |
17926a79 | 948 | |
33941284 | 949 | memcpy(&data.v1.session_key, session_key, sizeof(data.v1.session_key)); |
17926a79 DH |
950 | |
951 | ret = key_instantiate_and_link(key, &data, sizeof(data), NULL, NULL); | |
952 | if (ret < 0) | |
953 | goto error; | |
954 | ||
955 | conn->key = key; | |
956 | _leave(" = 0 [%d]", key_serial(key)); | |
957 | return 0; | |
958 | ||
959 | error: | |
960 | key_revoke(key); | |
961 | key_put(key); | |
962 | _leave(" = -ENOMEM [ins %d]", ret); | |
963 | return -ENOMEM; | |
964 | } | |
17926a79 | 965 | EXPORT_SYMBOL(rxrpc_get_server_data_key); |
76181c13 DH |
966 | |
967 | /** | |
968 | * rxrpc_get_null_key - Generate a null RxRPC key | |
969 | * @keyname: The name to give the key. | |
970 | * | |
971 | * Generate a null RxRPC key that can be used to indicate anonymous security is | |
972 | * required for a particular domain. | |
973 | */ | |
974 | struct key *rxrpc_get_null_key(const char *keyname) | |
975 | { | |
d84f4f99 | 976 | const struct cred *cred = current_cred(); |
76181c13 DH |
977 | struct key *key; |
978 | int ret; | |
979 | ||
d84f4f99 | 980 | key = key_alloc(&key_type_rxrpc, keyname, 0, 0, cred, |
76181c13 DH |
981 | KEY_POS_SEARCH, KEY_ALLOC_NOT_IN_QUOTA); |
982 | if (IS_ERR(key)) | |
983 | return key; | |
984 | ||
985 | ret = key_instantiate_and_link(key, NULL, 0, NULL, NULL); | |
986 | if (ret < 0) { | |
987 | key_revoke(key); | |
988 | key_put(key); | |
989 | return ERR_PTR(ret); | |
990 | } | |
991 | ||
992 | return key; | |
993 | } | |
994 | EXPORT_SYMBOL(rxrpc_get_null_key); | |
ed6dd18b DH |
995 | |
996 | /* | |
997 | * read the contents of an rxrpc key | |
998 | * - this returns the result in XDR form | |
999 | */ | |
1000 | static long rxrpc_read(const struct key *key, | |
1001 | char __user *buffer, size_t buflen) | |
1002 | { | |
99455153 DH |
1003 | const struct rxrpc_key_token *token; |
1004 | const struct krb5_principal *princ; | |
1005 | size_t size; | |
1006 | __be32 __user *xdr, *oldxdr; | |
1007 | u32 cnlen, toksize, ntoks, tok, zero; | |
1008 | u16 toksizes[AFSTOKEN_MAX]; | |
1009 | int loop; | |
ed6dd18b DH |
1010 | |
1011 | _enter(""); | |
1012 | ||
1013 | /* we don't know what form we should return non-AFS keys in */ | |
1014 | if (memcmp(key->description, "afs@", 4) != 0) | |
1015 | return -EOPNOTSUPP; | |
1016 | cnlen = strlen(key->description + 4); | |
1017 | ||
99455153 DH |
1018 | #define RND(X) (((X) + 3) & ~3) |
1019 | ||
ed6dd18b DH |
1020 | /* AFS keys we return in XDR form, so we need to work out the size of |
1021 | * the XDR */ | |
1022 | size = 2 * 4; /* flags, cellname len */ | |
99455153 | 1023 | size += RND(cnlen); /* cellname */ |
ed6dd18b DH |
1024 | size += 1 * 4; /* token count */ |
1025 | ||
1026 | ntoks = 0; | |
1027 | for (token = key->payload.data; token; token = token->next) { | |
99455153 DH |
1028 | toksize = 4; /* sec index */ |
1029 | ||
ed6dd18b DH |
1030 | switch (token->security_index) { |
1031 | case RXRPC_SECURITY_RXKAD: | |
99455153 DH |
1032 | toksize += 8 * 4; /* viceid, kvno, key*2, begin, |
1033 | * end, primary, tktlen */ | |
1034 | toksize += RND(token->kad->ticket_len); | |
ed6dd18b DH |
1035 | break; |
1036 | ||
99455153 DH |
1037 | case RXRPC_SECURITY_RXK5: |
1038 | princ = &token->k5->client; | |
1039 | toksize += 4 + princ->n_name_parts * 4; | |
1040 | for (loop = 0; loop < princ->n_name_parts; loop++) | |
1041 | toksize += RND(strlen(princ->name_parts[loop])); | |
1042 | toksize += 4 + RND(strlen(princ->realm)); | |
1043 | ||
1044 | princ = &token->k5->server; | |
1045 | toksize += 4 + princ->n_name_parts * 4; | |
1046 | for (loop = 0; loop < princ->n_name_parts; loop++) | |
1047 | toksize += RND(strlen(princ->name_parts[loop])); | |
1048 | toksize += 4 + RND(strlen(princ->realm)); | |
1049 | ||
1050 | toksize += 8 + RND(token->k5->session.data_len); | |
1051 | ||
1052 | toksize += 4 * 8 + 2 * 4; | |
1053 | ||
1054 | toksize += 4 + token->k5->n_addresses * 8; | |
1055 | for (loop = 0; loop < token->k5->n_addresses; loop++) | |
1056 | toksize += RND(token->k5->addresses[loop].data_len); | |
1057 | ||
1058 | toksize += 4 + RND(token->k5->ticket_len); | |
1059 | toksize += 4 + RND(token->k5->ticket2_len); | |
1060 | ||
1061 | toksize += 4 + token->k5->n_authdata * 8; | |
1062 | for (loop = 0; loop < token->k5->n_authdata; loop++) | |
1063 | toksize += RND(token->k5->authdata[loop].data_len); | |
ed6dd18b | 1064 | break; |
99455153 DH |
1065 | |
1066 | default: /* we have a ticket we can't encode */ | |
1067 | BUG(); | |
1068 | continue; | |
ed6dd18b | 1069 | } |
99455153 DH |
1070 | |
1071 | _debug("token[%u]: toksize=%u", ntoks, toksize); | |
1072 | ASSERTCMP(toksize, <=, AFSTOKEN_LENGTH_MAX); | |
1073 | ||
1074 | toksizes[ntoks++] = toksize; | |
1075 | size += toksize + 4; /* each token has a length word */ | |
ed6dd18b DH |
1076 | } |
1077 | ||
99455153 DH |
1078 | #undef RND |
1079 | ||
ed6dd18b DH |
1080 | if (!buffer || buflen < size) |
1081 | return size; | |
1082 | ||
1083 | xdr = (__be32 __user *) buffer; | |
1084 | zero = 0; | |
1085 | #define ENCODE(x) \ | |
1086 | do { \ | |
1087 | __be32 y = htonl(x); \ | |
1088 | if (put_user(y, xdr++) < 0) \ | |
1089 | goto fault; \ | |
1090 | } while(0) | |
99455153 DH |
1091 | #define ENCODE_DATA(l, s) \ |
1092 | do { \ | |
1093 | u32 _l = (l); \ | |
1094 | ENCODE(l); \ | |
1095 | if (copy_to_user(xdr, (s), _l) != 0) \ | |
1096 | goto fault; \ | |
1097 | if (_l & 3 && \ | |
1098 | copy_to_user((u8 *)xdr + _l, &zero, 4 - (_l & 3)) != 0) \ | |
1099 | goto fault; \ | |
1100 | xdr += (_l + 3) >> 2; \ | |
1101 | } while(0) | |
1102 | #define ENCODE64(x) \ | |
1103 | do { \ | |
1104 | __be64 y = cpu_to_be64(x); \ | |
1105 | if (copy_to_user(xdr, &y, 8) != 0) \ | |
1106 | goto fault; \ | |
1107 | xdr += 8 >> 2; \ | |
1108 | } while(0) | |
1109 | #define ENCODE_STR(s) \ | |
1110 | do { \ | |
1111 | const char *_s = (s); \ | |
1112 | ENCODE_DATA(strlen(_s), _s); \ | |
1113 | } while(0) | |
ed6dd18b | 1114 | |
99455153 DH |
1115 | ENCODE(0); /* flags */ |
1116 | ENCODE_DATA(cnlen, key->description + 4); /* cellname */ | |
1117 | ENCODE(ntoks); | |
ed6dd18b | 1118 | |
99455153 | 1119 | tok = 0; |
ed6dd18b | 1120 | for (token = key->payload.data; token; token = token->next) { |
99455153 DH |
1121 | toksize = toksizes[tok++]; |
1122 | ENCODE(toksize); | |
1123 | oldxdr = xdr; | |
1124 | ENCODE(token->security_index); | |
ed6dd18b DH |
1125 | |
1126 | switch (token->security_index) { | |
1127 | case RXRPC_SECURITY_RXKAD: | |
ed6dd18b DH |
1128 | ENCODE(token->kad->vice_id); |
1129 | ENCODE(token->kad->kvno); | |
99455153 | 1130 | ENCODE_DATA(8, token->kad->session_key); |
ed6dd18b DH |
1131 | ENCODE(token->kad->start); |
1132 | ENCODE(token->kad->expiry); | |
1133 | ENCODE(token->kad->primary_flag); | |
99455153 DH |
1134 | ENCODE_DATA(token->kad->ticket_len, token->kad->ticket); |
1135 | break; | |
1136 | ||
1137 | case RXRPC_SECURITY_RXK5: | |
1138 | princ = &token->k5->client; | |
1139 | ENCODE(princ->n_name_parts); | |
1140 | for (loop = 0; loop < princ->n_name_parts; loop++) | |
1141 | ENCODE_STR(princ->name_parts[loop]); | |
1142 | ENCODE_STR(princ->realm); | |
1143 | ||
1144 | princ = &token->k5->server; | |
1145 | ENCODE(princ->n_name_parts); | |
1146 | for (loop = 0; loop < princ->n_name_parts; loop++) | |
1147 | ENCODE_STR(princ->name_parts[loop]); | |
1148 | ENCODE_STR(princ->realm); | |
1149 | ||
1150 | ENCODE(token->k5->session.tag); | |
1151 | ENCODE_DATA(token->k5->session.data_len, | |
1152 | token->k5->session.data); | |
1153 | ||
1154 | ENCODE64(token->k5->authtime); | |
1155 | ENCODE64(token->k5->starttime); | |
1156 | ENCODE64(token->k5->endtime); | |
1157 | ENCODE64(token->k5->renew_till); | |
1158 | ENCODE(token->k5->is_skey); | |
1159 | ENCODE(token->k5->flags); | |
1160 | ||
1161 | ENCODE(token->k5->n_addresses); | |
1162 | for (loop = 0; loop < token->k5->n_addresses; loop++) { | |
1163 | ENCODE(token->k5->addresses[loop].tag); | |
1164 | ENCODE_DATA(token->k5->addresses[loop].data_len, | |
1165 | token->k5->addresses[loop].data); | |
1166 | } | |
1167 | ||
1168 | ENCODE_DATA(token->k5->ticket_len, token->k5->ticket); | |
1169 | ENCODE_DATA(token->k5->ticket2_len, token->k5->ticket2); | |
1170 | ||
1171 | ENCODE(token->k5->n_authdata); | |
1172 | for (loop = 0; loop < token->k5->n_authdata; loop++) { | |
1173 | ENCODE(token->k5->authdata[loop].tag); | |
1174 | ENCODE_DATA(token->k5->authdata[loop].data_len, | |
1175 | token->k5->authdata[loop].data); | |
1176 | } | |
ed6dd18b DH |
1177 | break; |
1178 | ||
1179 | default: | |
99455153 | 1180 | BUG(); |
ed6dd18b DH |
1181 | break; |
1182 | } | |
99455153 DH |
1183 | |
1184 | ASSERTCMP((unsigned long)xdr - (unsigned long)oldxdr, ==, | |
1185 | toksize); | |
ed6dd18b DH |
1186 | } |
1187 | ||
99455153 DH |
1188 | #undef ENCODE_STR |
1189 | #undef ENCODE_DATA | |
1190 | #undef ENCODE64 | |
ed6dd18b DH |
1191 | #undef ENCODE |
1192 | ||
99455153 | 1193 | ASSERTCMP(tok, ==, ntoks); |
ed6dd18b DH |
1194 | ASSERTCMP((char __user *) xdr - buffer, ==, size); |
1195 | _leave(" = %zu", size); | |
1196 | return size; | |
1197 | ||
1198 | fault: | |
1199 | _leave(" = -EFAULT"); | |
1200 | return -EFAULT; | |
1201 | } |