Commit | Line | Data |
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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 | ||
6a36978e | 169 | static int get_host_u32(struct xdr_stream *xdr, u32 *res) |
1d658336 | 170 | { |
778e512b BF |
171 | __be32 *p; |
172 | ||
173 | p = xdr_inline_decode(xdr, 4); | |
174 | if (!p) | |
1d658336 | 175 | return -EINVAL; |
6a36978e BF |
176 | /* Contents of linux creds are all host-endian: */ |
177 | memcpy(res, p, sizeof(u32)); | |
1d658336 SS |
178 | return 0; |
179 | } | |
180 | ||
181 | static int gssx_dec_linux_creds(struct xdr_stream *xdr, | |
182 | struct svc_cred *creds) | |
183 | { | |
184 | u32 length; | |
185 | __be32 *p; | |
6a36978e BF |
186 | u32 tmp; |
187 | u32 N; | |
188 | int i, err; | |
1d658336 SS |
189 | |
190 | p = xdr_inline_decode(xdr, 4); | |
191 | if (unlikely(p == NULL)) | |
192 | return -ENOSPC; | |
193 | ||
194 | length = be32_to_cpup(p); | |
195 | ||
778e512b | 196 | if (length > (3 + NGROUPS_MAX) * sizeof(u32)) |
1d658336 SS |
197 | return -ENOSPC; |
198 | ||
1d658336 | 199 | /* uid */ |
6a36978e | 200 | err = get_host_u32(xdr, &tmp); |
1d658336 SS |
201 | if (err) |
202 | return err; | |
d28fcc83 | 203 | creds->cr_uid = make_kuid(&init_user_ns, tmp); |
1d658336 SS |
204 | |
205 | /* gid */ | |
6a36978e | 206 | err = get_host_u32(xdr, &tmp); |
1d658336 SS |
207 | if (err) |
208 | return err; | |
d28fcc83 | 209 | creds->cr_gid = make_kgid(&init_user_ns, tmp); |
1d658336 SS |
210 | |
211 | /* number of additional gid's */ | |
6a36978e | 212 | err = get_host_u32(xdr, &tmp); |
1d658336 SS |
213 | if (err) |
214 | return err; | |
215 | N = tmp; | |
778e512b BF |
216 | if ((3 + N) * sizeof(u32) != length) |
217 | return -EINVAL; | |
1d658336 SS |
218 | creds->cr_group_info = groups_alloc(N); |
219 | if (creds->cr_group_info == NULL) | |
220 | return -ENOMEM; | |
221 | ||
222 | /* gid's */ | |
223 | for (i = 0; i < N; i++) { | |
d28fcc83 | 224 | kgid_t kgid; |
6a36978e | 225 | err = get_host_u32(xdr, &tmp); |
d28fcc83 BF |
226 | if (err) |
227 | goto out_free_groups; | |
228 | err = -EINVAL; | |
229 | kgid = make_kgid(&init_user_ns, tmp); | |
230 | if (!gid_valid(kgid)) | |
231 | goto out_free_groups; | |
232 | GROUP_AT(creds->cr_group_info, i) = kgid; | |
1d658336 SS |
233 | } |
234 | ||
235 | return 0; | |
d28fcc83 BF |
236 | out_free_groups: |
237 | groups_free(creds->cr_group_info); | |
238 | return err; | |
1d658336 SS |
239 | } |
240 | ||
241 | static int gssx_dec_option_array(struct xdr_stream *xdr, | |
242 | struct gssx_option_array *oa) | |
243 | { | |
244 | struct svc_cred *creds; | |
245 | u32 count, i; | |
246 | __be32 *p; | |
247 | int err; | |
248 | ||
249 | p = xdr_inline_decode(xdr, 4); | |
250 | if (unlikely(p == NULL)) | |
251 | return -ENOSPC; | |
252 | count = be32_to_cpup(p++); | |
9fd40c5a GU |
253 | if (!count) |
254 | return 0; | |
1d658336 | 255 | |
9fd40c5a GU |
256 | /* we recognize only 1 currently: CREDS_VALUE */ |
257 | oa->count = 1; | |
1d658336 | 258 | |
9fd40c5a GU |
259 | oa->data = kmalloc(sizeof(struct gssx_option), GFP_KERNEL); |
260 | if (!oa->data) | |
261 | return -ENOMEM; | |
1d658336 | 262 | |
9fd40c5a GU |
263 | creds = kmalloc(sizeof(struct svc_cred), GFP_KERNEL); |
264 | if (!creds) { | |
265 | kfree(oa->data); | |
266 | return -ENOMEM; | |
1d658336 | 267 | } |
9fd40c5a GU |
268 | |
269 | oa->data[0].option.data = CREDS_VALUE; | |
270 | oa->data[0].option.len = sizeof(CREDS_VALUE); | |
271 | oa->data[0].value.data = (void *)creds; | |
272 | oa->data[0].value.len = 0; | |
273 | ||
1d658336 SS |
274 | for (i = 0; i < count; i++) { |
275 | gssx_buffer dummy = { 0, NULL }; | |
276 | u32 length; | |
277 | ||
278 | /* option buffer */ | |
279 | p = xdr_inline_decode(xdr, 4); | |
280 | if (unlikely(p == NULL)) | |
281 | return -ENOSPC; | |
282 | ||
283 | length = be32_to_cpup(p); | |
284 | p = xdr_inline_decode(xdr, length); | |
285 | if (unlikely(p == NULL)) | |
286 | return -ENOSPC; | |
287 | ||
288 | if (length == sizeof(CREDS_VALUE) && | |
289 | memcmp(p, CREDS_VALUE, sizeof(CREDS_VALUE)) == 0) { | |
290 | /* We have creds here. parse them */ | |
291 | err = gssx_dec_linux_creds(xdr, creds); | |
292 | if (err) | |
293 | return err; | |
294 | oa->data[0].value.len = 1; /* presence */ | |
295 | } else { | |
296 | /* consume uninteresting buffer */ | |
297 | err = gssx_dec_buffer(xdr, &dummy); | |
298 | if (err) | |
299 | return err; | |
300 | } | |
301 | } | |
302 | return 0; | |
303 | } | |
304 | ||
305 | static int gssx_dec_status(struct xdr_stream *xdr, | |
306 | struct gssx_status *status) | |
307 | { | |
308 | __be32 *p; | |
309 | int err; | |
310 | ||
311 | /* status->major_status */ | |
312 | p = xdr_inline_decode(xdr, 8); | |
313 | if (unlikely(p == NULL)) | |
314 | return -ENOSPC; | |
315 | p = xdr_decode_hyper(p, &status->major_status); | |
316 | ||
317 | /* status->mech */ | |
318 | err = gssx_dec_buffer(xdr, &status->mech); | |
319 | if (err) | |
320 | return err; | |
321 | ||
322 | /* status->minor_status */ | |
323 | p = xdr_inline_decode(xdr, 8); | |
324 | if (unlikely(p == NULL)) | |
325 | return -ENOSPC; | |
326 | p = xdr_decode_hyper(p, &status->minor_status); | |
327 | ||
328 | /* status->major_status_string */ | |
329 | err = gssx_dec_buffer(xdr, &status->major_status_string); | |
330 | if (err) | |
331 | return err; | |
332 | ||
333 | /* status->minor_status_string */ | |
334 | err = gssx_dec_buffer(xdr, &status->minor_status_string); | |
335 | if (err) | |
336 | return err; | |
337 | ||
338 | /* status->server_ctx */ | |
339 | err = gssx_dec_buffer(xdr, &status->server_ctx); | |
340 | if (err) | |
341 | return err; | |
342 | ||
343 | /* we assume we have no options for now, so simply consume them */ | |
344 | /* status->options */ | |
345 | err = dummy_dec_opt_array(xdr, &status->options); | |
346 | ||
347 | return err; | |
348 | } | |
349 | ||
350 | static int gssx_enc_call_ctx(struct xdr_stream *xdr, | |
351 | struct gssx_call_ctx *ctx) | |
352 | { | |
353 | struct gssx_option opt; | |
354 | __be32 *p; | |
355 | int err; | |
356 | ||
357 | /* ctx->locale */ | |
358 | err = gssx_enc_buffer(xdr, &ctx->locale); | |
359 | if (err) | |
360 | return err; | |
361 | ||
362 | /* ctx->server_ctx */ | |
363 | err = gssx_enc_buffer(xdr, &ctx->server_ctx); | |
364 | if (err) | |
365 | return err; | |
366 | ||
367 | /* we always want to ask for lucid contexts */ | |
368 | /* ctx->options */ | |
369 | p = xdr_reserve_space(xdr, 4); | |
370 | *p = cpu_to_be32(2); | |
371 | ||
372 | /* we want a lucid_v1 context */ | |
373 | opt.option.data = LUCID_OPTION; | |
374 | opt.option.len = sizeof(LUCID_OPTION); | |
375 | opt.value.data = LUCID_VALUE; | |
376 | opt.value.len = sizeof(LUCID_VALUE); | |
377 | err = gssx_enc_option(xdr, &opt); | |
378 | ||
379 | /* ..and user creds */ | |
380 | opt.option.data = CREDS_OPTION; | |
381 | opt.option.len = sizeof(CREDS_OPTION); | |
382 | opt.value.data = CREDS_VALUE; | |
383 | opt.value.len = sizeof(CREDS_VALUE); | |
384 | err = gssx_enc_option(xdr, &opt); | |
385 | ||
386 | return err; | |
387 | } | |
388 | ||
389 | static int gssx_dec_name_attr(struct xdr_stream *xdr, | |
390 | struct gssx_name_attr *attr) | |
391 | { | |
392 | int err; | |
393 | ||
394 | /* attr->attr */ | |
395 | err = gssx_dec_buffer(xdr, &attr->attr); | |
396 | if (err) | |
397 | return err; | |
398 | ||
399 | /* attr->value */ | |
400 | err = gssx_dec_buffer(xdr, &attr->value); | |
401 | if (err) | |
402 | return err; | |
403 | ||
404 | /* attr->extensions */ | |
405 | err = dummy_dec_opt_array(xdr, &attr->extensions); | |
406 | ||
407 | return err; | |
408 | } | |
409 | ||
410 | static int dummy_enc_nameattr_array(struct xdr_stream *xdr, | |
411 | struct gssx_name_attr_array *naa) | |
412 | { | |
413 | __be32 *p; | |
414 | ||
415 | if (naa->count != 0) | |
416 | return -EINVAL; | |
417 | ||
418 | p = xdr_reserve_space(xdr, 4); | |
419 | if (!p) | |
420 | return -ENOSPC; | |
421 | *p = 0; | |
422 | ||
423 | return 0; | |
424 | } | |
425 | ||
426 | static int dummy_dec_nameattr_array(struct xdr_stream *xdr, | |
427 | struct gssx_name_attr_array *naa) | |
428 | { | |
dc43376c | 429 | struct gssx_name_attr dummy = { .attr = {.len = 0} }; |
1d658336 SS |
430 | u32 count, i; |
431 | __be32 *p; | |
432 | ||
433 | p = xdr_inline_decode(xdr, 4); | |
434 | if (unlikely(p == NULL)) | |
435 | return -ENOSPC; | |
436 | count = be32_to_cpup(p++); | |
437 | for (i = 0; i < count; i++) { | |
438 | gssx_dec_name_attr(xdr, &dummy); | |
439 | } | |
440 | ||
441 | naa->count = 0; | |
442 | naa->data = NULL; | |
443 | return 0; | |
444 | } | |
445 | ||
446 | static struct xdr_netobj zero_netobj = {}; | |
447 | ||
448 | static struct gssx_name_attr_array zero_name_attr_array = {}; | |
449 | ||
450 | static struct gssx_option_array zero_option_array = {}; | |
451 | ||
452 | static int gssx_enc_name(struct xdr_stream *xdr, | |
453 | struct gssx_name *name) | |
454 | { | |
455 | int err; | |
456 | ||
457 | /* name->display_name */ | |
458 | err = gssx_enc_buffer(xdr, &name->display_name); | |
459 | if (err) | |
460 | return err; | |
461 | ||
462 | /* name->name_type */ | |
463 | err = gssx_enc_buffer(xdr, &zero_netobj); | |
464 | if (err) | |
465 | return err; | |
466 | ||
467 | /* name->exported_name */ | |
468 | err = gssx_enc_buffer(xdr, &zero_netobj); | |
469 | if (err) | |
470 | return err; | |
471 | ||
472 | /* name->exported_composite_name */ | |
473 | err = gssx_enc_buffer(xdr, &zero_netobj); | |
474 | if (err) | |
475 | return err; | |
476 | ||
477 | /* leave name_attributes empty for now, will add once we have any | |
478 | * to pass up at all */ | |
479 | /* name->name_attributes */ | |
480 | err = dummy_enc_nameattr_array(xdr, &zero_name_attr_array); | |
481 | if (err) | |
482 | return err; | |
483 | ||
484 | /* leave options empty for now, will add once we have any options | |
485 | * to pass up at all */ | |
486 | /* name->extensions */ | |
487 | err = dummy_enc_opt_array(xdr, &zero_option_array); | |
488 | ||
489 | return err; | |
490 | } | |
491 | ||
dc43376c | 492 | |
1d658336 SS |
493 | static int gssx_dec_name(struct xdr_stream *xdr, |
494 | struct gssx_name *name) | |
495 | { | |
dc43376c BF |
496 | struct xdr_netobj dummy_netobj = { .len = 0 }; |
497 | struct gssx_name_attr_array dummy_name_attr_array = { .count = 0 }; | |
498 | struct gssx_option_array dummy_option_array = { .count = 0 }; | |
1d658336 SS |
499 | int err; |
500 | ||
501 | /* name->display_name */ | |
502 | err = gssx_dec_buffer(xdr, &name->display_name); | |
503 | if (err) | |
504 | return err; | |
505 | ||
506 | /* name->name_type */ | |
507 | err = gssx_dec_buffer(xdr, &dummy_netobj); | |
508 | if (err) | |
509 | return err; | |
510 | ||
511 | /* name->exported_name */ | |
512 | err = gssx_dec_buffer(xdr, &dummy_netobj); | |
513 | if (err) | |
514 | return err; | |
515 | ||
516 | /* name->exported_composite_name */ | |
517 | err = gssx_dec_buffer(xdr, &dummy_netobj); | |
518 | if (err) | |
519 | return err; | |
520 | ||
521 | /* we assume we have no attributes for now, so simply consume them */ | |
522 | /* name->name_attributes */ | |
523 | err = dummy_dec_nameattr_array(xdr, &dummy_name_attr_array); | |
524 | if (err) | |
525 | return err; | |
526 | ||
527 | /* we assume we have no options for now, so simply consume them */ | |
528 | /* name->extensions */ | |
529 | err = dummy_dec_opt_array(xdr, &dummy_option_array); | |
530 | ||
531 | return err; | |
532 | } | |
533 | ||
534 | static int dummy_enc_credel_array(struct xdr_stream *xdr, | |
535 | struct gssx_cred_element_array *cea) | |
536 | { | |
537 | __be32 *p; | |
538 | ||
539 | if (cea->count != 0) | |
540 | return -EINVAL; | |
541 | ||
542 | p = xdr_reserve_space(xdr, 4); | |
543 | if (!p) | |
544 | return -ENOSPC; | |
545 | *p = 0; | |
546 | ||
547 | return 0; | |
548 | } | |
549 | ||
550 | static int gssx_enc_cred(struct xdr_stream *xdr, | |
551 | struct gssx_cred *cred) | |
552 | { | |
553 | int err; | |
554 | ||
555 | /* cred->desired_name */ | |
556 | err = gssx_enc_name(xdr, &cred->desired_name); | |
557 | if (err) | |
558 | return err; | |
559 | ||
560 | /* cred->elements */ | |
561 | err = dummy_enc_credel_array(xdr, &cred->elements); | |
b26ec9b1 BF |
562 | if (err) |
563 | return err; | |
1d658336 SS |
564 | |
565 | /* cred->cred_handle_reference */ | |
566 | err = gssx_enc_buffer(xdr, &cred->cred_handle_reference); | |
567 | if (err) | |
568 | return err; | |
569 | ||
570 | /* cred->needs_release */ | |
571 | err = gssx_enc_bool(xdr, cred->needs_release); | |
572 | ||
573 | return err; | |
574 | } | |
575 | ||
576 | static int gssx_enc_ctx(struct xdr_stream *xdr, | |
577 | struct gssx_ctx *ctx) | |
578 | { | |
579 | __be32 *p; | |
580 | int err; | |
581 | ||
582 | /* ctx->exported_context_token */ | |
583 | err = gssx_enc_buffer(xdr, &ctx->exported_context_token); | |
584 | if (err) | |
585 | return err; | |
586 | ||
587 | /* ctx->state */ | |
588 | err = gssx_enc_buffer(xdr, &ctx->state); | |
589 | if (err) | |
590 | return err; | |
591 | ||
592 | /* ctx->need_release */ | |
593 | err = gssx_enc_bool(xdr, ctx->need_release); | |
594 | if (err) | |
595 | return err; | |
596 | ||
597 | /* ctx->mech */ | |
598 | err = gssx_enc_buffer(xdr, &ctx->mech); | |
599 | if (err) | |
600 | return err; | |
601 | ||
602 | /* ctx->src_name */ | |
603 | err = gssx_enc_name(xdr, &ctx->src_name); | |
604 | if (err) | |
605 | return err; | |
606 | ||
607 | /* ctx->targ_name */ | |
608 | err = gssx_enc_name(xdr, &ctx->targ_name); | |
609 | if (err) | |
610 | return err; | |
611 | ||
612 | /* ctx->lifetime */ | |
613 | p = xdr_reserve_space(xdr, 8+8); | |
614 | if (!p) | |
615 | return -ENOSPC; | |
616 | p = xdr_encode_hyper(p, ctx->lifetime); | |
617 | ||
618 | /* ctx->ctx_flags */ | |
619 | p = xdr_encode_hyper(p, ctx->ctx_flags); | |
620 | ||
621 | /* ctx->locally_initiated */ | |
622 | err = gssx_enc_bool(xdr, ctx->locally_initiated); | |
623 | if (err) | |
624 | return err; | |
625 | ||
626 | /* ctx->open */ | |
627 | err = gssx_enc_bool(xdr, ctx->open); | |
628 | if (err) | |
629 | return err; | |
630 | ||
631 | /* leave options empty for now, will add once we have any options | |
632 | * to pass up at all */ | |
633 | /* ctx->options */ | |
634 | err = dummy_enc_opt_array(xdr, &ctx->options); | |
635 | ||
636 | return err; | |
637 | } | |
638 | ||
639 | static int gssx_dec_ctx(struct xdr_stream *xdr, | |
640 | struct gssx_ctx *ctx) | |
641 | { | |
642 | __be32 *p; | |
643 | int err; | |
644 | ||
645 | /* ctx->exported_context_token */ | |
646 | err = gssx_dec_buffer(xdr, &ctx->exported_context_token); | |
647 | if (err) | |
648 | return err; | |
649 | ||
650 | /* ctx->state */ | |
651 | err = gssx_dec_buffer(xdr, &ctx->state); | |
652 | if (err) | |
653 | return err; | |
654 | ||
655 | /* ctx->need_release */ | |
656 | err = gssx_dec_bool(xdr, &ctx->need_release); | |
657 | if (err) | |
658 | return err; | |
659 | ||
660 | /* ctx->mech */ | |
661 | err = gssx_dec_buffer(xdr, &ctx->mech); | |
662 | if (err) | |
663 | return err; | |
664 | ||
665 | /* ctx->src_name */ | |
666 | err = gssx_dec_name(xdr, &ctx->src_name); | |
667 | if (err) | |
668 | return err; | |
669 | ||
670 | /* ctx->targ_name */ | |
671 | err = gssx_dec_name(xdr, &ctx->targ_name); | |
672 | if (err) | |
673 | return err; | |
674 | ||
675 | /* ctx->lifetime */ | |
676 | p = xdr_inline_decode(xdr, 8+8); | |
677 | if (unlikely(p == NULL)) | |
678 | return -ENOSPC; | |
679 | p = xdr_decode_hyper(p, &ctx->lifetime); | |
680 | ||
681 | /* ctx->ctx_flags */ | |
682 | p = xdr_decode_hyper(p, &ctx->ctx_flags); | |
683 | ||
684 | /* ctx->locally_initiated */ | |
685 | err = gssx_dec_bool(xdr, &ctx->locally_initiated); | |
686 | if (err) | |
687 | return err; | |
688 | ||
689 | /* ctx->open */ | |
690 | err = gssx_dec_bool(xdr, &ctx->open); | |
691 | if (err) | |
692 | return err; | |
693 | ||
694 | /* we assume we have no options for now, so simply consume them */ | |
695 | /* ctx->options */ | |
696 | err = dummy_dec_opt_array(xdr, &ctx->options); | |
697 | ||
698 | return err; | |
699 | } | |
700 | ||
701 | static int gssx_enc_cb(struct xdr_stream *xdr, struct gssx_cb *cb) | |
702 | { | |
703 | __be32 *p; | |
704 | int err; | |
705 | ||
706 | /* cb->initiator_addrtype */ | |
707 | p = xdr_reserve_space(xdr, 8); | |
708 | if (!p) | |
709 | return -ENOSPC; | |
710 | p = xdr_encode_hyper(p, cb->initiator_addrtype); | |
711 | ||
712 | /* cb->initiator_address */ | |
713 | err = gssx_enc_buffer(xdr, &cb->initiator_address); | |
714 | if (err) | |
715 | return err; | |
716 | ||
717 | /* cb->acceptor_addrtype */ | |
718 | p = xdr_reserve_space(xdr, 8); | |
719 | if (!p) | |
720 | return -ENOSPC; | |
721 | p = xdr_encode_hyper(p, cb->acceptor_addrtype); | |
722 | ||
723 | /* cb->acceptor_address */ | |
724 | err = gssx_enc_buffer(xdr, &cb->acceptor_address); | |
725 | if (err) | |
726 | return err; | |
727 | ||
728 | /* cb->application_data */ | |
729 | err = gssx_enc_buffer(xdr, &cb->application_data); | |
730 | ||
731 | return err; | |
732 | } | |
733 | ||
734 | void gssx_enc_accept_sec_context(struct rpc_rqst *req, | |
735 | struct xdr_stream *xdr, | |
736 | struct gssx_arg_accept_sec_context *arg) | |
737 | { | |
738 | int err; | |
739 | ||
740 | err = gssx_enc_call_ctx(xdr, &arg->call_ctx); | |
741 | if (err) | |
742 | goto done; | |
743 | ||
744 | /* arg->context_handle */ | |
b26ec9b1 | 745 | if (arg->context_handle) |
1d658336 | 746 | err = gssx_enc_ctx(xdr, arg->context_handle); |
b26ec9b1 | 747 | else |
1d658336 | 748 | err = gssx_enc_bool(xdr, 0); |
b26ec9b1 BF |
749 | if (err) |
750 | goto done; | |
1d658336 SS |
751 | |
752 | /* arg->cred_handle */ | |
b26ec9b1 | 753 | if (arg->cred_handle) |
1d658336 | 754 | err = gssx_enc_cred(xdr, arg->cred_handle); |
b26ec9b1 | 755 | else |
1d658336 | 756 | err = gssx_enc_bool(xdr, 0); |
b26ec9b1 BF |
757 | if (err) |
758 | goto done; | |
1d658336 SS |
759 | |
760 | /* arg->input_token */ | |
761 | err = gssx_enc_in_token(xdr, &arg->input_token); | |
762 | if (err) | |
763 | goto done; | |
764 | ||
765 | /* arg->input_cb */ | |
b26ec9b1 | 766 | if (arg->input_cb) |
1d658336 | 767 | err = gssx_enc_cb(xdr, arg->input_cb); |
b26ec9b1 | 768 | else |
1d658336 | 769 | err = gssx_enc_bool(xdr, 0); |
b26ec9b1 BF |
770 | if (err) |
771 | goto done; | |
1d658336 SS |
772 | |
773 | err = gssx_enc_bool(xdr, arg->ret_deleg_cred); | |
774 | if (err) | |
775 | goto done; | |
776 | ||
777 | /* leave options empty for now, will add once we have any options | |
778 | * to pass up at all */ | |
779 | /* arg->options */ | |
780 | err = dummy_enc_opt_array(xdr, &arg->options); | |
781 | ||
9dfd87da BF |
782 | xdr_inline_pages(&req->rq_rcv_buf, |
783 | PAGE_SIZE/2 /* pretty arbitrary */, | |
784 | arg->pages, 0 /* page base */, arg->npages * PAGE_SIZE); | |
1d658336 SS |
785 | done: |
786 | if (err) | |
787 | dprintk("RPC: gssx_enc_accept_sec_context: %d\n", err); | |
788 | } | |
789 | ||
790 | int gssx_dec_accept_sec_context(struct rpc_rqst *rqstp, | |
791 | struct xdr_stream *xdr, | |
792 | struct gssx_res_accept_sec_context *res) | |
793 | { | |
fb43f11c | 794 | u32 value_follows; |
1d658336 SS |
795 | int err; |
796 | ||
797 | /* res->status */ | |
798 | err = gssx_dec_status(xdr, &res->status); | |
799 | if (err) | |
800 | return err; | |
801 | ||
802 | /* res->context_handle */ | |
fb43f11c BF |
803 | err = gssx_dec_bool(xdr, &value_follows); |
804 | if (err) | |
805 | return err; | |
806 | if (value_follows) { | |
1d658336 SS |
807 | err = gssx_dec_ctx(xdr, res->context_handle); |
808 | if (err) | |
809 | return err; | |
810 | } else { | |
811 | res->context_handle = NULL; | |
812 | } | |
813 | ||
814 | /* res->output_token */ | |
fb43f11c BF |
815 | err = gssx_dec_bool(xdr, &value_follows); |
816 | if (err) | |
817 | return err; | |
818 | if (value_follows) { | |
1d658336 SS |
819 | err = gssx_dec_buffer(xdr, res->output_token); |
820 | if (err) | |
821 | return err; | |
822 | } else { | |
823 | res->output_token = NULL; | |
824 | } | |
825 | ||
826 | /* res->delegated_cred_handle */ | |
fb43f11c BF |
827 | err = gssx_dec_bool(xdr, &value_follows); |
828 | if (err) | |
829 | return err; | |
830 | if (value_follows) { | |
1d658336 SS |
831 | /* we do not support upcall servers sending this data. */ |
832 | return -EINVAL; | |
833 | } | |
834 | ||
835 | /* res->options */ | |
836 | err = gssx_dec_option_array(xdr, &res->options); | |
837 | ||
838 | return err; | |
839 | } |