Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 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 | |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 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 | |
J. Bruce Fields | 6a36978 | 2013-08-23 11:17:53 -0400 | [diff] [blame] | 169 | static int get_host_u32(struct xdr_stream *xdr, u32 *res) |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 170 | { |
J. Bruce Fields | 778e512 | 2013-08-21 10:32:52 -0400 | [diff] [blame] | 171 | __be32 *p; |
| 172 | |
| 173 | p = xdr_inline_decode(xdr, 4); |
| 174 | if (!p) |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 175 | return -EINVAL; |
J. Bruce Fields | 6a36978 | 2013-08-23 11:17:53 -0400 | [diff] [blame] | 176 | /* Contents of linux creds are all host-endian: */ |
| 177 | memcpy(res, p, sizeof(u32)); |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 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; |
J. Bruce Fields | 6a36978 | 2013-08-23 11:17:53 -0400 | [diff] [blame] | 186 | u32 tmp; |
| 187 | u32 N; |
| 188 | int i, err; |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 189 | |
| 190 | p = xdr_inline_decode(xdr, 4); |
| 191 | if (unlikely(p == NULL)) |
| 192 | return -ENOSPC; |
| 193 | |
| 194 | length = be32_to_cpup(p); |
| 195 | |
J. Bruce Fields | 778e512 | 2013-08-21 10:32:52 -0400 | [diff] [blame] | 196 | if (length > (3 + NGROUPS_MAX) * sizeof(u32)) |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 197 | return -ENOSPC; |
| 198 | |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 199 | /* uid */ |
J. Bruce Fields | 6a36978 | 2013-08-23 11:17:53 -0400 | [diff] [blame] | 200 | err = get_host_u32(xdr, &tmp); |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 201 | if (err) |
| 202 | return err; |
J. Bruce Fields | d28fcc8 | 2013-04-29 18:21:29 -0400 | [diff] [blame] | 203 | creds->cr_uid = make_kuid(&init_user_ns, tmp); |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 204 | |
| 205 | /* gid */ |
J. Bruce Fields | 6a36978 | 2013-08-23 11:17:53 -0400 | [diff] [blame] | 206 | err = get_host_u32(xdr, &tmp); |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 207 | if (err) |
| 208 | return err; |
J. Bruce Fields | d28fcc8 | 2013-04-29 18:21:29 -0400 | [diff] [blame] | 209 | creds->cr_gid = make_kgid(&init_user_ns, tmp); |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 210 | |
| 211 | /* number of additional gid's */ |
J. Bruce Fields | 6a36978 | 2013-08-23 11:17:53 -0400 | [diff] [blame] | 212 | err = get_host_u32(xdr, &tmp); |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 213 | if (err) |
| 214 | return err; |
| 215 | N = tmp; |
J. Bruce Fields | 778e512 | 2013-08-21 10:32:52 -0400 | [diff] [blame] | 216 | if ((3 + N) * sizeof(u32) != length) |
| 217 | return -EINVAL; |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 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++) { |
J. Bruce Fields | d28fcc8 | 2013-04-29 18:21:29 -0400 | [diff] [blame] | 224 | kgid_t kgid; |
J. Bruce Fields | 6a36978 | 2013-08-23 11:17:53 -0400 | [diff] [blame] | 225 | err = get_host_u32(xdr, &tmp); |
J. Bruce Fields | d28fcc8 | 2013-04-29 18:21:29 -0400 | [diff] [blame] | 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; |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 233 | } |
| 234 | |
| 235 | return 0; |
J. Bruce Fields | d28fcc8 | 2013-04-29 18:21:29 -0400 | [diff] [blame] | 236 | out_free_groups: |
| 237 | groups_free(creds->cr_group_info); |
| 238 | return err; |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 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++); |
Geert Uytterhoeven | 9fd40c5 | 2013-05-06 09:21:03 +0200 | [diff] [blame] | 253 | if (!count) |
| 254 | return 0; |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 255 | |
Geert Uytterhoeven | 9fd40c5 | 2013-05-06 09:21:03 +0200 | [diff] [blame] | 256 | /* we recognize only 1 currently: CREDS_VALUE */ |
| 257 | oa->count = 1; |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 258 | |
Geert Uytterhoeven | 9fd40c5 | 2013-05-06 09:21:03 +0200 | [diff] [blame] | 259 | oa->data = kmalloc(sizeof(struct gssx_option), GFP_KERNEL); |
| 260 | if (!oa->data) |
| 261 | return -ENOMEM; |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 262 | |
Geert Uytterhoeven | 9fd40c5 | 2013-05-06 09:21:03 +0200 | [diff] [blame] | 263 | creds = kmalloc(sizeof(struct svc_cred), GFP_KERNEL); |
| 264 | if (!creds) { |
| 265 | kfree(oa->data); |
| 266 | return -ENOMEM; |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 267 | } |
Geert Uytterhoeven | 9fd40c5 | 2013-05-06 09:21:03 +0200 | [diff] [blame] | 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 | |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 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 | { |
J. Bruce Fields | dc43376 | 2013-06-07 10:11:19 -0400 | [diff] [blame] | 429 | struct gssx_name_attr dummy = { .attr = {.len = 0} }; |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 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 | |
J. Bruce Fields | dc43376 | 2013-06-07 10:11:19 -0400 | [diff] [blame] | 492 | |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 493 | static int gssx_dec_name(struct xdr_stream *xdr, |
| 494 | struct gssx_name *name) |
| 495 | { |
J. Bruce Fields | dc43376 | 2013-06-07 10:11:19 -0400 | [diff] [blame] | 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 }; |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 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); |
J. Bruce Fields | b26ec9b | 2013-10-08 16:09:04 -0400 | [diff] [blame] | 562 | if (err) |
| 563 | return err; |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 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 */ |
J. Bruce Fields | b26ec9b | 2013-10-08 16:09:04 -0400 | [diff] [blame] | 745 | if (arg->context_handle) |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 746 | err = gssx_enc_ctx(xdr, arg->context_handle); |
J. Bruce Fields | b26ec9b | 2013-10-08 16:09:04 -0400 | [diff] [blame] | 747 | else |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 748 | err = gssx_enc_bool(xdr, 0); |
J. Bruce Fields | b26ec9b | 2013-10-08 16:09:04 -0400 | [diff] [blame] | 749 | if (err) |
| 750 | goto done; |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 751 | |
| 752 | /* arg->cred_handle */ |
J. Bruce Fields | b26ec9b | 2013-10-08 16:09:04 -0400 | [diff] [blame] | 753 | if (arg->cred_handle) |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 754 | err = gssx_enc_cred(xdr, arg->cred_handle); |
J. Bruce Fields | b26ec9b | 2013-10-08 16:09:04 -0400 | [diff] [blame] | 755 | else |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 756 | err = gssx_enc_bool(xdr, 0); |
J. Bruce Fields | b26ec9b | 2013-10-08 16:09:04 -0400 | [diff] [blame] | 757 | if (err) |
| 758 | goto done; |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 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 */ |
J. Bruce Fields | b26ec9b | 2013-10-08 16:09:04 -0400 | [diff] [blame] | 766 | if (arg->input_cb) |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 767 | err = gssx_enc_cb(xdr, arg->input_cb); |
J. Bruce Fields | b26ec9b | 2013-10-08 16:09:04 -0400 | [diff] [blame] | 768 | else |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 769 | err = gssx_enc_bool(xdr, 0); |
J. Bruce Fields | b26ec9b | 2013-10-08 16:09:04 -0400 | [diff] [blame] | 770 | if (err) |
| 771 | goto done; |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 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 | |
J. Bruce Fields | 9dfd87d | 2013-08-20 18:13:27 -0400 | [diff] [blame] | 782 | xdr_inline_pages(&req->rq_rcv_buf, |
| 783 | PAGE_SIZE/2 /* pretty arbitrary */, |
| 784 | arg->pages, 0 /* page base */, arg->npages * PAGE_SIZE); |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 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 | { |
J. Bruce Fields | fb43f11 | 2013-05-07 17:45:20 -0400 | [diff] [blame] | 794 | u32 value_follows; |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 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 */ |
J. Bruce Fields | fb43f11 | 2013-05-07 17:45:20 -0400 | [diff] [blame] | 803 | err = gssx_dec_bool(xdr, &value_follows); |
| 804 | if (err) |
| 805 | return err; |
| 806 | if (value_follows) { |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 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 */ |
J. Bruce Fields | fb43f11 | 2013-05-07 17:45:20 -0400 | [diff] [blame] | 815 | err = gssx_dec_bool(xdr, &value_follows); |
| 816 | if (err) |
| 817 | return err; |
| 818 | if (value_follows) { |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 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 */ |
J. Bruce Fields | fb43f11 | 2013-05-07 17:45:20 -0400 | [diff] [blame] | 827 | err = gssx_dec_bool(xdr, &value_follows); |
| 828 | if (err) |
| 829 | return err; |
| 830 | if (value_follows) { |
Simo Sorce | 1d65833 | 2012-05-25 18:09:55 -0400 | [diff] [blame] | 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 | } |