1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36#include <linux/types.h>
37#include <linux/slab.h>
38#include <linux/module.h>
39#include <linux/oid_registry.h>
40#include <linux/sunrpc/msg_prot.h>
41#include <linux/sunrpc/gss_asn1.h>
42#include <linux/sunrpc/auth_gss.h>
43#include <linux/sunrpc/svcauth_gss.h>
44#include <linux/sunrpc/gss_err.h>
45#include <linux/sunrpc/sched.h>
46#include <linux/sunrpc/gss_api.h>
47#include <linux/sunrpc/clnt.h>
48
49#ifdef RPC_DEBUG
50# define RPCDBG_FACILITY RPCDBG_AUTH
51#endif
52
53static LIST_HEAD(registered_mechs);
54static DEFINE_SPINLOCK(registered_mechs_lock);
55
56static void
57gss_mech_free(struct gss_api_mech *gm)
58{
59 struct pf_desc *pf;
60 int i;
61
62 for (i = 0; i < gm->gm_pf_num; i++) {
63 pf = &gm->gm_pfs[i];
64 kfree(pf->auth_domain_name);
65 pf->auth_domain_name = NULL;
66 }
67}
68
69static inline char *
70make_auth_domain_name(char *name)
71{
72 static char *prefix = "gss/";
73 char *new;
74
75 new = kmalloc(strlen(name) + strlen(prefix) + 1, GFP_KERNEL);
76 if (new) {
77 strcpy(new, prefix);
78 strcat(new, name);
79 }
80 return new;
81}
82
83static int
84gss_mech_svc_setup(struct gss_api_mech *gm)
85{
86 struct pf_desc *pf;
87 int i, status;
88
89 for (i = 0; i < gm->gm_pf_num; i++) {
90 pf = &gm->gm_pfs[i];
91 pf->auth_domain_name = make_auth_domain_name(pf->name);
92 status = -ENOMEM;
93 if (pf->auth_domain_name == NULL)
94 goto out;
95 status = svcauth_gss_register_pseudoflavor(pf->pseudoflavor,
96 pf->auth_domain_name);
97 if (status)
98 goto out;
99 }
100 return 0;
101out:
102 gss_mech_free(gm);
103 return status;
104}
105
106
107
108
109
110
111
112int gss_mech_register(struct gss_api_mech *gm)
113{
114 int status;
115
116 status = gss_mech_svc_setup(gm);
117 if (status)
118 return status;
119 spin_lock(®istered_mechs_lock);
120 list_add(&gm->gm_list, ®istered_mechs);
121 spin_unlock(®istered_mechs_lock);
122 dprintk("RPC: registered gss mechanism %s\n", gm->gm_name);
123 return 0;
124}
125EXPORT_SYMBOL_GPL(gss_mech_register);
126
127
128
129
130
131
132void gss_mech_unregister(struct gss_api_mech *gm)
133{
134 spin_lock(®istered_mechs_lock);
135 list_del(&gm->gm_list);
136 spin_unlock(®istered_mechs_lock);
137 dprintk("RPC: unregistered gss mechanism %s\n", gm->gm_name);
138 gss_mech_free(gm);
139}
140EXPORT_SYMBOL_GPL(gss_mech_unregister);
141
142static struct gss_api_mech *gss_mech_get(struct gss_api_mech *gm)
143{
144 __module_get(gm->gm_owner);
145 return gm;
146}
147
148static struct gss_api_mech *
149_gss_mech_get_by_name(const char *name)
150{
151 struct gss_api_mech *pos, *gm = NULL;
152
153 spin_lock(®istered_mechs_lock);
154 list_for_each_entry(pos, ®istered_mechs, gm_list) {
155 if (0 == strcmp(name, pos->gm_name)) {
156 if (try_module_get(pos->gm_owner))
157 gm = pos;
158 break;
159 }
160 }
161 spin_unlock(®istered_mechs_lock);
162 return gm;
163
164}
165
166struct gss_api_mech * gss_mech_get_by_name(const char *name)
167{
168 struct gss_api_mech *gm = NULL;
169
170 gm = _gss_mech_get_by_name(name);
171 if (!gm) {
172 request_module("rpc-auth-gss-%s", name);
173 gm = _gss_mech_get_by_name(name);
174 }
175 return gm;
176}
177
178struct gss_api_mech *gss_mech_get_by_OID(struct rpcsec_gss_oid *obj)
179{
180 struct gss_api_mech *pos, *gm = NULL;
181 char buf[32];
182
183 if (sprint_oid(obj->data, obj->len, buf, sizeof(buf)) < 0)
184 return NULL;
185 dprintk("RPC: %s(%s)\n", __func__, buf);
186 request_module("rpc-auth-gss-%s", buf);
187
188 spin_lock(®istered_mechs_lock);
189 list_for_each_entry(pos, ®istered_mechs, gm_list) {
190 if (obj->len == pos->gm_oid.len) {
191 if (0 == memcmp(obj->data, pos->gm_oid.data, obj->len)) {
192 if (try_module_get(pos->gm_owner))
193 gm = pos;
194 break;
195 }
196 }
197 }
198 spin_unlock(®istered_mechs_lock);
199 return gm;
200}
201
202static inline int
203mech_supports_pseudoflavor(struct gss_api_mech *gm, u32 pseudoflavor)
204{
205 int i;
206
207 for (i = 0; i < gm->gm_pf_num; i++) {
208 if (gm->gm_pfs[i].pseudoflavor == pseudoflavor)
209 return 1;
210 }
211 return 0;
212}
213
214static struct gss_api_mech *_gss_mech_get_by_pseudoflavor(u32 pseudoflavor)
215{
216 struct gss_api_mech *gm = NULL, *pos;
217
218 spin_lock(®istered_mechs_lock);
219 list_for_each_entry(pos, ®istered_mechs, gm_list) {
220 if (!mech_supports_pseudoflavor(pos, pseudoflavor)) {
221 module_put(pos->gm_owner);
222 continue;
223 }
224 if (try_module_get(pos->gm_owner))
225 gm = pos;
226 break;
227 }
228 spin_unlock(®istered_mechs_lock);
229 return gm;
230}
231
232struct gss_api_mech *
233gss_mech_get_by_pseudoflavor(u32 pseudoflavor)
234{
235 struct gss_api_mech *gm;
236
237 gm = _gss_mech_get_by_pseudoflavor(pseudoflavor);
238
239 if (!gm) {
240 request_module("rpc-auth-gss-%u", pseudoflavor);
241 gm = _gss_mech_get_by_pseudoflavor(pseudoflavor);
242 }
243 return gm;
244}
245
246
247
248
249
250
251
252
253
254
255
256int gss_mech_list_pseudoflavors(rpc_authflavor_t *array_ptr, int size)
257{
258 struct gss_api_mech *pos = NULL;
259 int j, i = 0;
260
261 spin_lock(®istered_mechs_lock);
262 list_for_each_entry(pos, ®istered_mechs, gm_list) {
263 for (j = 0; j < pos->gm_pf_num; j++) {
264 if (i >= size) {
265 spin_unlock(®istered_mechs_lock);
266 return -ENOMEM;
267 }
268 array_ptr[i++] = pos->gm_pfs[j].pseudoflavor;
269 }
270 }
271 spin_unlock(®istered_mechs_lock);
272 return i;
273}
274
275
276
277
278
279
280
281
282
283rpc_authflavor_t gss_svc_to_pseudoflavor(struct gss_api_mech *gm, u32 qop,
284 u32 service)
285{
286 int i;
287
288 for (i = 0; i < gm->gm_pf_num; i++) {
289 if (gm->gm_pfs[i].qop == qop &&
290 gm->gm_pfs[i].service == service) {
291 return gm->gm_pfs[i].pseudoflavor;
292 }
293 }
294 return RPC_AUTH_MAXFLAVOR;
295}
296
297
298
299
300
301
302
303
304rpc_authflavor_t gss_mech_info2flavor(struct rpcsec_gss_info *info)
305{
306 rpc_authflavor_t pseudoflavor;
307 struct gss_api_mech *gm;
308
309 gm = gss_mech_get_by_OID(&info->oid);
310 if (gm == NULL)
311 return RPC_AUTH_MAXFLAVOR;
312
313 pseudoflavor = gss_svc_to_pseudoflavor(gm, info->qop, info->service);
314
315 gss_mech_put(gm);
316 return pseudoflavor;
317}
318
319
320
321
322
323
324
325
326
327int gss_mech_flavor2info(rpc_authflavor_t pseudoflavor,
328 struct rpcsec_gss_info *info)
329{
330 struct gss_api_mech *gm;
331 int i;
332
333 gm = gss_mech_get_by_pseudoflavor(pseudoflavor);
334 if (gm == NULL)
335 return -ENOENT;
336
337 for (i = 0; i < gm->gm_pf_num; i++) {
338 if (gm->gm_pfs[i].pseudoflavor == pseudoflavor) {
339 memcpy(info->oid.data, gm->gm_oid.data, gm->gm_oid.len);
340 info->oid.len = gm->gm_oid.len;
341 info->qop = gm->gm_pfs[i].qop;
342 info->service = gm->gm_pfs[i].service;
343 gss_mech_put(gm);
344 return 0;
345 }
346 }
347
348 gss_mech_put(gm);
349 return -ENOENT;
350}
351
352u32
353gss_pseudoflavor_to_service(struct gss_api_mech *gm, u32 pseudoflavor)
354{
355 int i;
356
357 for (i = 0; i < gm->gm_pf_num; i++) {
358 if (gm->gm_pfs[i].pseudoflavor == pseudoflavor)
359 return gm->gm_pfs[i].service;
360 }
361 return 0;
362}
363
364char *
365gss_service_to_auth_domain_name(struct gss_api_mech *gm, u32 service)
366{
367 int i;
368
369 for (i = 0; i < gm->gm_pf_num; i++) {
370 if (gm->gm_pfs[i].service == service)
371 return gm->gm_pfs[i].auth_domain_name;
372 }
373 return NULL;
374}
375
376void
377gss_mech_put(struct gss_api_mech * gm)
378{
379 if (gm)
380 module_put(gm->gm_owner);
381}
382
383
384
385int
386gss_import_sec_context(const void *input_token, size_t bufsize,
387 struct gss_api_mech *mech,
388 struct gss_ctx **ctx_id,
389 time_t *endtime,
390 gfp_t gfp_mask)
391{
392 if (!(*ctx_id = kzalloc(sizeof(**ctx_id), gfp_mask)))
393 return -ENOMEM;
394 (*ctx_id)->mech_type = gss_mech_get(mech);
395
396 return mech->gm_ops->gss_import_sec_context(input_token, bufsize,
397 *ctx_id, endtime, gfp_mask);
398}
399
400
401
402u32
403gss_get_mic(struct gss_ctx *context_handle,
404 struct xdr_buf *message,
405 struct xdr_netobj *mic_token)
406{
407 return context_handle->mech_type->gm_ops
408 ->gss_get_mic(context_handle,
409 message,
410 mic_token);
411}
412
413
414
415u32
416gss_verify_mic(struct gss_ctx *context_handle,
417 struct xdr_buf *message,
418 struct xdr_netobj *mic_token)
419{
420 return context_handle->mech_type->gm_ops
421 ->gss_verify_mic(context_handle,
422 message,
423 mic_token);
424}
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440u32
441gss_wrap(struct gss_ctx *ctx_id,
442 int offset,
443 struct xdr_buf *buf,
444 struct page **inpages)
445{
446 return ctx_id->mech_type->gm_ops
447 ->gss_wrap(ctx_id, offset, buf, inpages);
448}
449
450u32
451gss_unwrap(struct gss_ctx *ctx_id,
452 int offset,
453 struct xdr_buf *buf)
454{
455 return ctx_id->mech_type->gm_ops
456 ->gss_unwrap(ctx_id, offset, buf);
457}
458
459
460
461
462
463
464u32
465gss_delete_sec_context(struct gss_ctx **context_handle)
466{
467 dprintk("RPC: gss_delete_sec_context deleting %p\n",
468 *context_handle);
469
470 if (!*context_handle)
471 return GSS_S_NO_CONTEXT;
472 if ((*context_handle)->internal_ctx_id)
473 (*context_handle)->mech_type->gm_ops
474 ->gss_delete_sec_context((*context_handle)
475 ->internal_ctx_id);
476 gss_mech_put((*context_handle)->mech_type);
477 kfree(*context_handle);
478 *context_handle=NULL;
479 return GSS_S_COMPLETE;
480}
481