Commit | Line | Data |
---|---|---|
1d658336 SS |
1 | /* |
2 | * GSS Proxy upcall module | |
3 | * | |
4 | * Copyright (C) 2012 Simo Sorce <simo@redhat.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | */ | |
20 | ||
21 | #include <linux/sunrpc/svcauth.h> | |
22 | #include "gss_rpc_xdr.h" | |
23 | ||
1d658336 SS |
24 | static int gssx_enc_bool(struct xdr_stream *xdr, int v) |
25 | { | |
26 | __be32 *p; | |
27 | ||
28 | p = xdr_reserve_space(xdr, 4); | |
29 | if (unlikely(p == NULL)) | |
30 | return -ENOSPC; | |
31 | *p = v ? xdr_one : xdr_zero; | |
32 | return 0; | |
33 | } | |
34 | ||
35 | static int gssx_dec_bool(struct xdr_stream *xdr, u32 *v) | |
36 | { | |
37 | __be32 *p; | |
38 | ||
39 | p = xdr_inline_decode(xdr, 4); | |
40 | if (unlikely(p == NULL)) | |
41 | return -ENOSPC; | |
42 | *v = be32_to_cpu(*p); | |
43 | return 0; | |
44 | } | |
45 | ||
46 | static int gssx_enc_buffer(struct xdr_stream *xdr, | |
47 | gssx_buffer *buf) | |
48 | { | |
49 | __be32 *p; | |
50 | ||
51 | p = xdr_reserve_space(xdr, sizeof(u32) + buf->len); | |
52 | if (!p) | |
53 | return -ENOSPC; | |
54 | xdr_encode_opaque(p, buf->data, buf->len); | |
55 | return 0; | |
56 | } | |
57 | ||
58 | static int gssx_enc_in_token(struct xdr_stream *xdr, | |
59 | struct gssp_in_token *in) | |
60 | { | |
61 | __be32 *p; | |
62 | ||
63 | p = xdr_reserve_space(xdr, 4); | |
64 | if (!p) | |
65 | return -ENOSPC; | |
66 | *p = cpu_to_be32(in->page_len); | |
67 | ||
68 | /* all we need to do is to write pages */ | |
69 | xdr_write_pages(xdr, in->pages, in->page_base, in->page_len); | |
70 | ||
71 | return 0; | |
72 | } | |
73 | ||
74 | ||
75 | static int gssx_dec_buffer(struct xdr_stream *xdr, | |
76 | gssx_buffer *buf) | |
77 | { | |
78 | u32 length; | |
79 | __be32 *p; | |
80 | ||
81 | p = xdr_inline_decode(xdr, 4); | |
82 | if (unlikely(p == NULL)) | |
83 | return -ENOSPC; | |
84 | ||
85 | length = be32_to_cpup(p); | |
86 | p = xdr_inline_decode(xdr, length); | |
87 | if (unlikely(p == NULL)) | |
88 | return -ENOSPC; | |
89 | ||
90 | if (buf->len == 0) { | |
91 | /* we intentionally are not interested in this buffer */ | |
92 | return 0; | |
93 | } | |
94 | if (length > buf->len) | |
95 | return -ENOSPC; | |
96 | ||
97 | if (!buf->data) { | |
98 | buf->data = kmemdup(p, length, GFP_KERNEL); | |
99 | if (!buf->data) | |
100 | return -ENOMEM; | |
101 | } else { | |
102 | memcpy(buf->data, p, length); | |
103 | } | |
104 | buf->len = length; | |
105 | return 0; | |
106 | } | |
107 | ||
108 | static int gssx_enc_option(struct xdr_stream *xdr, | |
109 | struct gssx_option *opt) | |
110 | { | |
111 | int err; | |
112 | ||
113 | err = gssx_enc_buffer(xdr, &opt->option); | |
114 | if (err) | |
115 | return err; | |
116 | err = gssx_enc_buffer(xdr, &opt->value); | |
117 | return err; | |
118 | } | |
119 | ||
120 | static int gssx_dec_option(struct xdr_stream *xdr, | |
121 | struct gssx_option *opt) | |
122 | { | |
123 | int err; | |
124 | ||
125 | err = gssx_dec_buffer(xdr, &opt->option); | |
126 | if (err) | |
127 | return err; | |
128 | err = gssx_dec_buffer(xdr, &opt->value); | |
129 | return err; | |
130 | } | |
131 | ||
132 | static int dummy_enc_opt_array(struct xdr_stream *xdr, | |
133 | struct gssx_option_array *oa) | |
134 | { | |
135 | __be32 *p; | |
136 | ||
137 | if (oa->count != 0) | |
138 | return -EINVAL; | |
139 | ||
140 | p = xdr_reserve_space(xdr, 4); | |
141 | if (!p) | |
142 | return -ENOSPC; | |
143 | *p = 0; | |
144 | ||
145 | return 0; | |
146 | } | |
147 | ||
148 | static int dummy_dec_opt_array(struct xdr_stream *xdr, | |
149 | struct gssx_option_array *oa) | |
150 | { | |
151 | struct gssx_option dummy; | |
152 | u32 count, i; | |
153 | __be32 *p; | |
154 | ||
155 | p = xdr_inline_decode(xdr, 4); | |
156 | if (unlikely(p == NULL)) | |
157 | return -ENOSPC; | |
158 | count = be32_to_cpup(p++); | |
159 | memset(&dummy, 0, sizeof(dummy)); | |
160 | for (i = 0; i < count; i++) { | |
161 | gssx_dec_option(xdr, &dummy); | |
162 | } | |
163 | ||
164 | oa->count = 0; | |
165 | oa->data = NULL; | |
166 | return 0; | |
167 | } | |
168 | ||
169 | static int get_s32(void **p, void *max, s32 *res) | |
170 | { | |
171 | void *base = *p; | |
172 | void *next = (void *)((char *)base + sizeof(s32)); | |
173 | if (unlikely(next > max || next < base)) | |
174 | return -EINVAL; | |
175 | memcpy(res, base, sizeof(s32)); | |
176 | *p = next; | |
177 | return 0; | |
178 | } | |
179 | ||
180 | static int gssx_dec_linux_creds(struct xdr_stream *xdr, | |
181 | struct svc_cred *creds) | |
182 | { | |
183 | u32 length; | |
184 | __be32 *p; | |
185 | void *q, *end; | |
186 | s32 tmp; | |
187 | int N, i, err; | |
188 | ||
189 | p = xdr_inline_decode(xdr, 4); | |
190 | if (unlikely(p == NULL)) | |
191 | return -ENOSPC; | |
192 | ||
193 | length = be32_to_cpup(p); | |
194 | ||
195 | /* FIXME: we do not want to use the scratch buffer for this one | |
196 | * may need to use functions that allows us to access an io vector | |
197 | * directly */ | |
198 | p = xdr_inline_decode(xdr, length); | |
199 | if (unlikely(p == NULL)) | |
200 | return -ENOSPC; | |
201 | ||
202 | q = p; | |
203 | end = q + length; | |
204 | ||
205 | /* uid */ | |
206 | err = get_s32(&q, end, &tmp); | |
207 | if (err) | |
208 | return err; | |
d28fcc83 | 209 | creds->cr_uid = make_kuid(&init_user_ns, tmp); |
1d658336 SS |
210 | |
211 | /* gid */ | |
212 | err = get_s32(&q, end, &tmp); | |
213 | if (err) | |
214 | return err; | |
d28fcc83 | 215 | creds->cr_gid = make_kgid(&init_user_ns, tmp); |
1d658336 SS |
216 | |
217 | /* number of additional gid's */ | |
218 | err = get_s32(&q, end, &tmp); | |
219 | if (err) | |
220 | return err; | |
221 | N = tmp; | |
222 | creds->cr_group_info = groups_alloc(N); | |
223 | if (creds->cr_group_info == NULL) | |
224 | return -ENOMEM; | |
225 | ||
226 | /* gid's */ | |
227 | for (i = 0; i < N; i++) { | |
d28fcc83 | 228 | kgid_t kgid; |
1d658336 | 229 | err = get_s32(&q, end, &tmp); |
d28fcc83 BF |
230 | if (err) |
231 | goto out_free_groups; | |
232 | err = -EINVAL; | |
233 | kgid = make_kgid(&init_user_ns, tmp); | |
234 | if (!gid_valid(kgid)) | |
235 | goto out_free_groups; | |
236 | GROUP_AT(creds->cr_group_info, i) = kgid; | |
1d658336 SS |
237 | } |
238 | ||
239 | return 0; | |
d28fcc83 BF |
240 | out_free_groups: |
241 | groups_free(creds->cr_group_info); | |
242 | return err; | |
1d658336 SS |
243 | } |
244 | ||
245 | static int gssx_dec_option_array(struct xdr_stream *xdr, | |
246 | struct gssx_option_array *oa) | |
247 | { | |
248 | struct svc_cred *creds; | |
249 | u32 count, i; | |
250 | __be32 *p; | |
251 | int err; | |
252 | ||
253 | p = xdr_inline_decode(xdr, 4); | |
254 | if (unlikely(p == NULL)) | |
255 | return -ENOSPC; | |
256 | count = be32_to_cpup(p++); | |
9fd40c5a GU |
257 | if (!count) |
258 | return 0; | |
1d658336 | 259 | |
9fd40c5a GU |
260 | /* we recognize only 1 currently: CREDS_VALUE */ |
261 | oa->count = 1; | |
1d658336 | 262 | |
9fd40c5a GU |
263 | oa->data = kmalloc(sizeof(struct gssx_option), GFP_KERNEL); |
264 | if (!oa->data) | |
265 | return -ENOMEM; | |
1d658336 | 266 | |
9fd40c5a GU |
267 | creds = kmalloc(sizeof(struct svc_cred), GFP_KERNEL); |
268 | if (!creds) { | |
269 | kfree(oa->data); | |
270 | return -ENOMEM; | |
1d658336 | 271 | } |
9fd40c5a GU |
272 | |
273 | oa->data[0].option.data = CREDS_VALUE; | |
274 | oa->data[0].option.len = sizeof(CREDS_VALUE); | |
275 | oa->data[0].value.data = (void *)creds; | |
276 | oa->data[0].value.len = 0; | |
277 | ||
1d658336 SS |
278 | for (i = 0; i < count; i++) { |
279 | gssx_buffer dummy = { 0, NULL }; | |
280 | u32 length; | |
281 | ||
282 | /* option buffer */ | |
283 | p = xdr_inline_decode(xdr, 4); | |
284 | if (unlikely(p == NULL)) | |
285 | return -ENOSPC; | |
286 | ||
287 | length = be32_to_cpup(p); | |
288 | p = xdr_inline_decode(xdr, length); | |
289 | if (unlikely(p == NULL)) | |
290 | return -ENOSPC; | |
291 | ||
292 | if (length == sizeof(CREDS_VALUE) && | |
293 | memcmp(p, CREDS_VALUE, sizeof(CREDS_VALUE)) == 0) { | |
294 | /* We have creds here. parse them */ | |
295 | err = gssx_dec_linux_creds(xdr, creds); | |
296 | if (err) | |
297 | return err; | |
298 | oa->data[0].value.len = 1; /* presence */ | |
299 | } else { | |
300 | /* consume uninteresting buffer */ | |
301 | err = gssx_dec_buffer(xdr, &dummy); | |
302 | if (err) | |
303 | return err; | |
304 | } | |
305 | } | |
306 | return 0; | |
307 | } | |
308 | ||
309 | static int gssx_dec_status(struct xdr_stream *xdr, | |
310 | struct gssx_status *status) | |
311 | { | |
312 | __be32 *p; | |
313 | int err; | |
314 | ||
315 | /* status->major_status */ | |
316 | p = xdr_inline_decode(xdr, 8); | |
317 | if (unlikely(p == NULL)) | |
318 | return -ENOSPC; | |
319 | p = xdr_decode_hyper(p, &status->major_status); | |
320 | ||
321 | /* status->mech */ | |
322 | err = gssx_dec_buffer(xdr, &status->mech); | |
323 | if (err) | |
324 | return err; | |
325 | ||
326 | /* status->minor_status */ | |
327 | p = xdr_inline_decode(xdr, 8); | |
328 | if (unlikely(p == NULL)) | |
329 | return -ENOSPC; | |
330 | p = xdr_decode_hyper(p, &status->minor_status); | |
331 | ||
332 | /* status->major_status_string */ | |
333 | err = gssx_dec_buffer(xdr, &status->major_status_string); | |
334 | if (err) | |
335 | return err; | |
336 | ||
337 | /* status->minor_status_string */ | |
338 | err = gssx_dec_buffer(xdr, &status->minor_status_string); | |
339 | if (err) | |
340 | return err; | |
341 | ||
342 | /* status->server_ctx */ | |
343 | err = gssx_dec_buffer(xdr, &status->server_ctx); | |
344 | if (err) | |
345 | return err; | |
346 | ||
347 | /* we assume we have no options for now, so simply consume them */ | |
348 | /* status->options */ | |
349 | err = dummy_dec_opt_array(xdr, &status->options); | |
350 | ||
351 | return err; | |
352 | } | |
353 | ||
354 | static int gssx_enc_call_ctx(struct xdr_stream *xdr, | |
355 | struct gssx_call_ctx *ctx) | |
356 | { | |
357 | struct gssx_option opt; | |
358 | __be32 *p; | |
359 | int err; | |
360 | ||
361 | /* ctx->locale */ | |
362 | err = gssx_enc_buffer(xdr, &ctx->locale); | |
363 | if (err) | |
364 | return err; | |
365 | ||
366 | /* ctx->server_ctx */ | |
367 | err = gssx_enc_buffer(xdr, &ctx->server_ctx); | |
368 | if (err) | |
369 | return err; | |
370 | ||
371 | /* we always want to ask for lucid contexts */ | |
372 | /* ctx->options */ | |
373 | p = xdr_reserve_space(xdr, 4); | |
374 | *p = cpu_to_be32(2); | |
375 | ||
376 | /* we want a lucid_v1 context */ | |
377 | opt.option.data = LUCID_OPTION; | |
378 | opt.option.len = sizeof(LUCID_OPTION); | |
379 | opt.value.data = LUCID_VALUE; | |
380 | opt.value.len = sizeof(LUCID_VALUE); | |
381 | err = gssx_enc_option(xdr, &opt); | |
382 | ||
383 | /* ..and user creds */ | |
384 | opt.option.data = CREDS_OPTION; | |
385 | opt.option.len = sizeof(CREDS_OPTION); | |
386 | opt.value.data = CREDS_VALUE; | |
387 | opt.value.len = sizeof(CREDS_VALUE); | |
388 | err = gssx_enc_option(xdr, &opt); | |
389 | ||
390 | return err; | |
391 | } | |
392 | ||
393 | static int gssx_dec_name_attr(struct xdr_stream *xdr, | |
394 | struct gssx_name_attr *attr) | |
395 | { | |
396 | int err; | |
397 | ||
398 | /* attr->attr */ | |
399 | err = gssx_dec_buffer(xdr, &attr->attr); | |
400 | if (err) | |
401 | return err; | |
402 | ||
403 | /* attr->value */ | |
404 | err = gssx_dec_buffer(xdr, &attr->value); | |
405 | if (err) | |
406 | return err; | |
407 | ||
408 | /* attr->extensions */ | |
409 | err = dummy_dec_opt_array(xdr, &attr->extensions); | |
410 | ||
411 | return err; | |
412 | } | |
413 | ||
414 | static int dummy_enc_nameattr_array(struct xdr_stream *xdr, | |
415 | struct gssx_name_attr_array *naa) | |
416 | { | |
417 | __be32 *p; | |
418 | ||
419 | if (naa->count != 0) | |
420 | return -EINVAL; | |
421 | ||
422 | p = xdr_reserve_space(xdr, 4); | |
423 | if (!p) | |
424 | return -ENOSPC; | |
425 | *p = 0; | |
426 | ||
427 | return 0; | |
428 | } | |
429 | ||
430 | static int dummy_dec_nameattr_array(struct xdr_stream *xdr, | |
431 | struct gssx_name_attr_array *naa) | |
432 | { | |
433 | struct gssx_name_attr dummy; | |
434 | u32 count, i; | |
435 | __be32 *p; | |
436 | ||
437 | p = xdr_inline_decode(xdr, 4); | |
438 | if (unlikely(p == NULL)) | |
439 | return -ENOSPC; | |
440 | count = be32_to_cpup(p++); | |
441 | for (i = 0; i < count; i++) { | |
442 | gssx_dec_name_attr(xdr, &dummy); | |
443 | } | |
444 | ||
445 | naa->count = 0; | |
446 | naa->data = NULL; | |
447 | return 0; | |
448 | } | |
449 | ||
450 | static struct xdr_netobj zero_netobj = {}; | |
451 | ||
452 | static struct gssx_name_attr_array zero_name_attr_array = {}; | |
453 | ||
454 | static struct gssx_option_array zero_option_array = {}; | |
455 | ||
456 | static int gssx_enc_name(struct xdr_stream *xdr, | |
457 | struct gssx_name *name) | |
458 | { | |
459 | int err; | |
460 | ||
461 | /* name->display_name */ | |
462 | err = gssx_enc_buffer(xdr, &name->display_name); | |
463 | if (err) | |
464 | return err; | |
465 | ||
466 | /* name->name_type */ | |
467 | err = gssx_enc_buffer(xdr, &zero_netobj); | |
468 | if (err) | |
469 | return err; | |
470 | ||
471 | /* name->exported_name */ | |
472 | err = gssx_enc_buffer(xdr, &zero_netobj); | |
473 | if (err) | |
474 | return err; | |
475 | ||
476 | /* name->exported_composite_name */ | |
477 | err = gssx_enc_buffer(xdr, &zero_netobj); | |
478 | if (err) | |
479 | return err; | |
480 | ||
481 | /* leave name_attributes empty for now, will add once we have any | |
482 | * to pass up at all */ | |
483 | /* name->name_attributes */ | |
484 | err = dummy_enc_nameattr_array(xdr, &zero_name_attr_array); | |
485 | if (err) | |
486 | return err; | |
487 | ||
488 | /* leave options empty for now, will add once we have any options | |
489 | * to pass up at all */ | |
490 | /* name->extensions */ | |
491 | err = dummy_enc_opt_array(xdr, &zero_option_array); | |
492 | ||
493 | return err; | |
494 | } | |
495 | ||
496 | static int gssx_dec_name(struct xdr_stream *xdr, | |
497 | struct gssx_name *name) | |
498 | { | |
499 | struct xdr_netobj dummy_netobj; | |
500 | struct gssx_name_attr_array dummy_name_attr_array; | |
501 | struct gssx_option_array dummy_option_array; | |
502 | int err; | |
503 | ||
504 | /* name->display_name */ | |
505 | err = gssx_dec_buffer(xdr, &name->display_name); | |
506 | if (err) | |
507 | return err; | |
508 | ||
509 | /* name->name_type */ | |
510 | err = gssx_dec_buffer(xdr, &dummy_netobj); | |
511 | if (err) | |
512 | return err; | |
513 | ||
514 | /* name->exported_name */ | |
515 | err = gssx_dec_buffer(xdr, &dummy_netobj); | |
516 | if (err) | |
517 | return err; | |
518 | ||
519 | /* name->exported_composite_name */ | |
520 | err = gssx_dec_buffer(xdr, &dummy_netobj); | |
521 | if (err) | |
522 | return err; | |
523 | ||
524 | /* we assume we have no attributes for now, so simply consume them */ | |
525 | /* name->name_attributes */ | |
526 | err = dummy_dec_nameattr_array(xdr, &dummy_name_attr_array); | |
527 | if (err) | |
528 | return err; | |
529 | ||
530 | /* we assume we have no options for now, so simply consume them */ | |
531 | /* name->extensions */ | |
532 | err = dummy_dec_opt_array(xdr, &dummy_option_array); | |
533 | ||
534 | return err; | |
535 | } | |
536 | ||
537 | static int dummy_enc_credel_array(struct xdr_stream *xdr, | |
538 | struct gssx_cred_element_array *cea) | |
539 | { | |
540 | __be32 *p; | |
541 | ||
542 | if (cea->count != 0) | |
543 | return -EINVAL; | |
544 | ||
545 | p = xdr_reserve_space(xdr, 4); | |
546 | if (!p) | |
547 | return -ENOSPC; | |
548 | *p = 0; | |
549 | ||
550 | return 0; | |
551 | } | |
552 | ||
553 | static int gssx_enc_cred(struct xdr_stream *xdr, | |
554 | struct gssx_cred *cred) | |
555 | { | |
556 | int err; | |
557 | ||
558 | /* cred->desired_name */ | |
559 | err = gssx_enc_name(xdr, &cred->desired_name); | |
560 | if (err) | |
561 | return err; | |
562 | ||
563 | /* cred->elements */ | |
564 | err = dummy_enc_credel_array(xdr, &cred->elements); | |
565 | ||
566 | /* cred->cred_handle_reference */ | |
567 | err = gssx_enc_buffer(xdr, &cred->cred_handle_reference); | |
568 | if (err) | |
569 | return err; | |
570 | ||
571 | /* cred->needs_release */ | |
572 | err = gssx_enc_bool(xdr, cred->needs_release); | |
573 | ||
574 | return err; | |
575 | } | |
576 | ||
577 | static int gssx_enc_ctx(struct xdr_stream *xdr, | |
578 | struct gssx_ctx *ctx) | |
579 | { | |
580 | __be32 *p; | |
581 | int err; | |
582 | ||
583 | /* ctx->exported_context_token */ | |
584 | err = gssx_enc_buffer(xdr, &ctx->exported_context_token); | |
585 | if (err) | |
586 | return err; | |
587 | ||
588 | /* ctx->state */ | |
589 | err = gssx_enc_buffer(xdr, &ctx->state); | |
590 | if (err) | |
591 | return err; | |
592 | ||
593 | /* ctx->need_release */ | |
594 | err = gssx_enc_bool(xdr, ctx->need_release); | |
595 | if (err) | |
596 | return err; | |
597 | ||
598 | /* ctx->mech */ | |
599 | err = gssx_enc_buffer(xdr, &ctx->mech); | |
600 | if (err) | |
601 | return err; | |
602 | ||
603 | /* ctx->src_name */ | |
604 | err = gssx_enc_name(xdr, &ctx->src_name); | |
605 | if (err) | |
606 | return err; | |
607 | ||
608 | /* ctx->targ_name */ | |
609 | err = gssx_enc_name(xdr, &ctx->targ_name); | |
610 | if (err) | |
611 | return err; | |
612 | ||
613 | /* ctx->lifetime */ | |
614 | p = xdr_reserve_space(xdr, 8+8); | |
615 | if (!p) | |
616 | return -ENOSPC; | |
617 | p = xdr_encode_hyper(p, ctx->lifetime); | |
618 | ||
619 | /* ctx->ctx_flags */ | |
620 | p = xdr_encode_hyper(p, ctx->ctx_flags); | |
621 | ||
622 | /* ctx->locally_initiated */ | |
623 | err = gssx_enc_bool(xdr, ctx->locally_initiated); | |
624 | if (err) | |
625 | return err; | |
626 | ||
627 | /* ctx->open */ | |
628 | err = gssx_enc_bool(xdr, ctx->open); | |
629 | if (err) | |
630 | return err; | |
631 | ||
632 | /* leave options empty for now, will add once we have any options | |
633 | * to pass up at all */ | |
634 | /* ctx->options */ | |
635 | err = dummy_enc_opt_array(xdr, &ctx->options); | |
636 | ||
637 | return err; | |
638 | } | |
639 | ||
640 | static int gssx_dec_ctx(struct xdr_stream *xdr, | |
641 | struct gssx_ctx *ctx) | |
642 | { | |
643 | __be32 *p; | |
644 | int err; | |
645 | ||
646 | /* ctx->exported_context_token */ | |
647 | err = gssx_dec_buffer(xdr, &ctx->exported_context_token); | |
648 | if (err) | |
649 | return err; | |
650 | ||
651 | /* ctx->state */ | |
652 | err = gssx_dec_buffer(xdr, &ctx->state); | |
653 | if (err) | |
654 | return err; | |
655 | ||
656 | /* ctx->need_release */ | |
657 | err = gssx_dec_bool(xdr, &ctx->need_release); | |
658 | if (err) | |
659 | return err; | |
660 | ||
661 | /* ctx->mech */ | |
662 | err = gssx_dec_buffer(xdr, &ctx->mech); | |
663 | if (err) | |
664 | return err; | |
665 | ||
666 | /* ctx->src_name */ | |
667 | err = gssx_dec_name(xdr, &ctx->src_name); | |
668 | if (err) | |
669 | return err; | |
670 | ||
671 | /* ctx->targ_name */ | |
672 | err = gssx_dec_name(xdr, &ctx->targ_name); | |
673 | if (err) | |
674 | return err; | |
675 | ||
676 | /* ctx->lifetime */ | |
677 | p = xdr_inline_decode(xdr, 8+8); | |
678 | if (unlikely(p == NULL)) | |
679 | return -ENOSPC; | |
680 | p = xdr_decode_hyper(p, &ctx->lifetime); | |
681 | ||
682 | /* ctx->ctx_flags */ | |
683 | p = xdr_decode_hyper(p, &ctx->ctx_flags); | |
684 | ||
685 | /* ctx->locally_initiated */ | |
686 | err = gssx_dec_bool(xdr, &ctx->locally_initiated); | |
687 | if (err) | |
688 | return err; | |
689 | ||
690 | /* ctx->open */ | |
691 | err = gssx_dec_bool(xdr, &ctx->open); | |
692 | if (err) | |
693 | return err; | |
694 | ||
695 | /* we assume we have no options for now, so simply consume them */ | |
696 | /* ctx->options */ | |
697 | err = dummy_dec_opt_array(xdr, &ctx->options); | |
698 | ||
699 | return err; | |
700 | } | |
701 | ||
702 | static int gssx_enc_cb(struct xdr_stream *xdr, struct gssx_cb *cb) | |
703 | { | |
704 | __be32 *p; | |
705 | int err; | |
706 | ||
707 | /* cb->initiator_addrtype */ | |
708 | p = xdr_reserve_space(xdr, 8); | |
709 | if (!p) | |
710 | return -ENOSPC; | |
711 | p = xdr_encode_hyper(p, cb->initiator_addrtype); | |
712 | ||
713 | /* cb->initiator_address */ | |
714 | err = gssx_enc_buffer(xdr, &cb->initiator_address); | |
715 | if (err) | |
716 | return err; | |
717 | ||
718 | /* cb->acceptor_addrtype */ | |
719 | p = xdr_reserve_space(xdr, 8); | |
720 | if (!p) | |
721 | return -ENOSPC; | |
722 | p = xdr_encode_hyper(p, cb->acceptor_addrtype); | |
723 | ||
724 | /* cb->acceptor_address */ | |
725 | err = gssx_enc_buffer(xdr, &cb->acceptor_address); | |
726 | if (err) | |
727 | return err; | |
728 | ||
729 | /* cb->application_data */ | |
730 | err = gssx_enc_buffer(xdr, &cb->application_data); | |
731 | ||
732 | return err; | |
733 | } | |
734 | ||
735 | void gssx_enc_accept_sec_context(struct rpc_rqst *req, | |
736 | struct xdr_stream *xdr, | |
737 | struct gssx_arg_accept_sec_context *arg) | |
738 | { | |
739 | int err; | |
740 | ||
741 | err = gssx_enc_call_ctx(xdr, &arg->call_ctx); | |
742 | if (err) | |
743 | goto done; | |
744 | ||
745 | /* arg->context_handle */ | |
746 | if (arg->context_handle) { | |
747 | err = gssx_enc_ctx(xdr, arg->context_handle); | |
748 | if (err) | |
749 | goto done; | |
750 | } else { | |
751 | err = gssx_enc_bool(xdr, 0); | |
752 | } | |
753 | ||
754 | /* arg->cred_handle */ | |
755 | if (arg->cred_handle) { | |
756 | err = gssx_enc_cred(xdr, arg->cred_handle); | |
757 | if (err) | |
758 | goto done; | |
759 | } else { | |
760 | err = gssx_enc_bool(xdr, 0); | |
761 | } | |
762 | ||
763 | /* arg->input_token */ | |
764 | err = gssx_enc_in_token(xdr, &arg->input_token); | |
765 | if (err) | |
766 | goto done; | |
767 | ||
768 | /* arg->input_cb */ | |
769 | if (arg->input_cb) { | |
770 | err = gssx_enc_cb(xdr, arg->input_cb); | |
771 | if (err) | |
772 | goto done; | |
773 | } else { | |
774 | err = gssx_enc_bool(xdr, 0); | |
775 | } | |
776 | ||
777 | err = gssx_enc_bool(xdr, arg->ret_deleg_cred); | |
778 | if (err) | |
779 | goto done; | |
780 | ||
781 | /* leave options empty for now, will add once we have any options | |
782 | * to pass up at all */ | |
783 | /* arg->options */ | |
784 | err = dummy_enc_opt_array(xdr, &arg->options); | |
785 | ||
786 | done: | |
787 | if (err) | |
788 | dprintk("RPC: gssx_enc_accept_sec_context: %d\n", err); | |
789 | } | |
790 | ||
791 | int gssx_dec_accept_sec_context(struct rpc_rqst *rqstp, | |
792 | struct xdr_stream *xdr, | |
793 | struct gssx_res_accept_sec_context *res) | |
794 | { | |
fb43f11c | 795 | u32 value_follows; |
1d658336 SS |
796 | int err; |
797 | ||
798 | /* res->status */ | |
799 | err = gssx_dec_status(xdr, &res->status); | |
800 | if (err) | |
801 | return err; | |
802 | ||
803 | /* res->context_handle */ | |
fb43f11c BF |
804 | err = gssx_dec_bool(xdr, &value_follows); |
805 | if (err) | |
806 | return err; | |
807 | if (value_follows) { | |
1d658336 SS |
808 | err = gssx_dec_ctx(xdr, res->context_handle); |
809 | if (err) | |
810 | return err; | |
811 | } else { | |
812 | res->context_handle = NULL; | |
813 | } | |
814 | ||
815 | /* res->output_token */ | |
fb43f11c BF |
816 | err = gssx_dec_bool(xdr, &value_follows); |
817 | if (err) | |
818 | return err; | |
819 | if (value_follows) { | |
1d658336 SS |
820 | err = gssx_dec_buffer(xdr, res->output_token); |
821 | if (err) | |
822 | return err; | |
823 | } else { | |
824 | res->output_token = NULL; | |
825 | } | |
826 | ||
827 | /* res->delegated_cred_handle */ | |
fb43f11c BF |
828 | err = gssx_dec_bool(xdr, &value_follows); |
829 | if (err) | |
830 | return err; | |
831 | if (value_follows) { | |
1d658336 SS |
832 | /* we do not support upcall servers sending this data. */ |
833 | return -EINVAL; | |
834 | } | |
835 | ||
836 | /* res->options */ | |
837 | err = gssx_dec_option_array(xdr, &res->options); | |
838 | ||
839 | return err; | |
840 | } |