1// SPDX-License-Identifier: BSD-3-Clause
  2/*
  3 *  linux/net/sunrpc/gss_mech_switch.c
  4 *
  5 *  Copyright (c) 2001 The Regents of the University of Michigan.
  6 *  All rights reserved.
  7 *
  8 *  J. Bruce Fields   <bfields@umich.edu>
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  9 */
 10
 11#include <linux/types.h>
 12#include <linux/slab.h>
 13#include <linux/module.h>
 14#include <linux/oid_registry.h>
 15#include <linux/sunrpc/msg_prot.h>
 16#include <linux/sunrpc/gss_asn1.h>
 17#include <linux/sunrpc/auth_gss.h>
 18#include <linux/sunrpc/svcauth_gss.h>
 19#include <linux/sunrpc/gss_err.h>
 20#include <linux/sunrpc/sched.h>
 21#include <linux/sunrpc/gss_api.h>
 22#include <linux/sunrpc/clnt.h>
 23
 24#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
 25# define RPCDBG_FACILITY        RPCDBG_AUTH
 26#endif
 27
 28static LIST_HEAD(registered_mechs);
 29static DEFINE_SPINLOCK(registered_mechs_lock);
 30
 31static void
 32gss_mech_free(struct gss_api_mech *gm)
 33{
 34	struct pf_desc *pf;
 35	int i;
 36
 37	for (i = 0; i < gm->gm_pf_num; i++) {
 38		pf = &gm->gm_pfs[i];
 39		kfree(pf->auth_domain_name);
 40		pf->auth_domain_name = NULL;
 41	}
 42}
 43
 44static inline char *
 45make_auth_domain_name(char *name)
 46{
 47	static char	*prefix = "gss/";
 48	char		*new;
 49
 50	new = kmalloc(strlen(name) + strlen(prefix) + 1, GFP_KERNEL);
 51	if (new) {
 52		strcpy(new, prefix);
 53		strcat(new, name);
 54	}
 55	return new;
 56}
 57
 58static int
 59gss_mech_svc_setup(struct gss_api_mech *gm)
 60{
 61	struct pf_desc *pf;
 62	int i, status;
 63
 64	for (i = 0; i < gm->gm_pf_num; i++) {
 65		pf = &gm->gm_pfs[i];
 66		pf->auth_domain_name = make_auth_domain_name(pf->name);
 67		status = -ENOMEM;
 68		if (pf->auth_domain_name == NULL)
 69			goto out;
 70		status = svcauth_gss_register_pseudoflavor(pf->pseudoflavor,
 71							pf->auth_domain_name);
 72		if (status)
 73			goto out;
 74	}
 75	return 0;
 76out:
 77	gss_mech_free(gm);
 78	return status;
 79}
 80
 81/**
 82 * gss_mech_register - register a GSS mechanism
 83 * @gm: GSS mechanism handle
 84 *
 85 * Returns zero if successful, or a negative errno.
 86 */
 87int gss_mech_register(struct gss_api_mech *gm)
 88{
 89	int status;
 90
 91	status = gss_mech_svc_setup(gm);
 92	if (status)
 93		return status;
 94	spin_lock(&registered_mechs_lock);
 95	list_add_rcu(&gm->gm_list, &registered_mechs);
 96	spin_unlock(&registered_mechs_lock);
 97	dprintk("RPC:       registered gss mechanism %s\n", gm->gm_name);
 98	return 0;
 99}
 
100EXPORT_SYMBOL_GPL(gss_mech_register);
101
102/**
103 * gss_mech_unregister - release a GSS mechanism
104 * @gm: GSS mechanism handle
105 *
106 */
107void gss_mech_unregister(struct gss_api_mech *gm)
108{
109	spin_lock(&registered_mechs_lock);
110	list_del_rcu(&gm->gm_list);
111	spin_unlock(&registered_mechs_lock);
112	dprintk("RPC:       unregistered gss mechanism %s\n", gm->gm_name);
113	gss_mech_free(gm);
114}
 
115EXPORT_SYMBOL_GPL(gss_mech_unregister);
116
117struct gss_api_mech *gss_mech_get(struct gss_api_mech *gm)
 
118{
119	__module_get(gm->gm_owner);
120	return gm;
121}
122EXPORT_SYMBOL(gss_mech_get);
123
124static struct gss_api_mech *
 
 
125_gss_mech_get_by_name(const char *name)
126{
127	struct gss_api_mech	*pos, *gm = NULL;
128
129	rcu_read_lock();
130	list_for_each_entry_rcu(pos, &registered_mechs, gm_list) {
131		if (0 == strcmp(name, pos->gm_name)) {
132			if (try_module_get(pos->gm_owner))
133				gm = pos;
134			break;
135		}
136	}
137	rcu_read_unlock();
138	return gm;
139
140}
141
142struct gss_api_mech * gss_mech_get_by_name(const char *name)
143{
144	struct gss_api_mech *gm = NULL;
145
146	gm = _gss_mech_get_by_name(name);
147	if (!gm) {
148		request_module("rpc-auth-gss-%s", name);
149		gm = _gss_mech_get_by_name(name);
150	}
151	return gm;
152}
 
153
154struct gss_api_mech *gss_mech_get_by_OID(struct rpcsec_gss_oid *obj)
 
155{
156	struct gss_api_mech	*pos, *gm = NULL;
157	char buf[32];
158
159	if (sprint_oid(obj->data, obj->len, buf, sizeof(buf)) < 0)
160		return NULL;
161	dprintk("RPC:       %s(%s)\n", __func__, buf);
162	request_module("rpc-auth-gss-%s", buf);
163
164	rcu_read_lock();
165	list_for_each_entry_rcu(pos, &registered_mechs, gm_list) {
166		if (obj->len == pos->gm_oid.len) {
167			if (0 == memcmp(obj->data, pos->gm_oid.data, obj->len)) {
168				if (try_module_get(pos->gm_owner))
169					gm = pos;
170				break;
171			}
172		}
173	}
174	rcu_read_unlock();
175	return gm;
 
176}
177
 
 
178static inline int
179mech_supports_pseudoflavor(struct gss_api_mech *gm, u32 pseudoflavor)
180{
181	int i;
182
183	for (i = 0; i < gm->gm_pf_num; i++) {
184		if (gm->gm_pfs[i].pseudoflavor == pseudoflavor)
185			return 1;
186	}
187	return 0;
188}
189
190static struct gss_api_mech *_gss_mech_get_by_pseudoflavor(u32 pseudoflavor)
191{
192	struct gss_api_mech *gm = NULL, *pos;
193
194	rcu_read_lock();
195	list_for_each_entry_rcu(pos, &registered_mechs, gm_list) {
196		if (!mech_supports_pseudoflavor(pos, pseudoflavor))
 
197			continue;
 
198		if (try_module_get(pos->gm_owner))
199			gm = pos;
200		break;
201	}
202	rcu_read_unlock();
203	return gm;
204}
205
206struct gss_api_mech *
207gss_mech_get_by_pseudoflavor(u32 pseudoflavor)
208{
209	struct gss_api_mech *gm;
210
211	gm = _gss_mech_get_by_pseudoflavor(pseudoflavor);
212
213	if (!gm) {
214		request_module("rpc-auth-gss-%u", pseudoflavor);
215		gm = _gss_mech_get_by_pseudoflavor(pseudoflavor);
216	}
217	return gm;
218}
219
220/**
221 * gss_mech_list_pseudoflavors - Discover registered GSS pseudoflavors
222 * @array_ptr: array to fill in
223 * @size: size of "array"
224 *
225 * Returns the number of array items filled in, or a negative errno.
226 *
227 * The returned array is not sorted by any policy.  Callers should not
228 * rely on the order of the items in the returned array.
229 */
230int gss_mech_list_pseudoflavors(rpc_authflavor_t *array_ptr, int size)
231{
232	struct gss_api_mech *pos = NULL;
233	int j, i = 0;
234
235	rcu_read_lock();
236	list_for_each_entry_rcu(pos, &registered_mechs, gm_list) {
237		for (j = 0; j < pos->gm_pf_num; j++) {
238			if (i >= size) {
239				spin_unlock(&registered_mechs_lock);
240				return -ENOMEM;
241			}
242			array_ptr[i++] = pos->gm_pfs[j].pseudoflavor;
243		}
244	}
245	rcu_read_unlock();
246	return i;
247}
248
249/**
250 * gss_svc_to_pseudoflavor - map a GSS service number to a pseudoflavor
251 * @gm: GSS mechanism handle
252 * @qop: GSS quality-of-protection value
253 * @service: GSS service value
254 *
255 * Returns a matching security flavor, or RPC_AUTH_MAXFLAVOR if none is found.
256 */
257rpc_authflavor_t gss_svc_to_pseudoflavor(struct gss_api_mech *gm, u32 qop,
258					 u32 service)
259{
260	int i;
261
262	for (i = 0; i < gm->gm_pf_num; i++) {
263		if (gm->gm_pfs[i].qop == qop &&
264		    gm->gm_pfs[i].service == service) {
265			return gm->gm_pfs[i].pseudoflavor;
266		}
267	}
268	return RPC_AUTH_MAXFLAVOR;
269}
270
271/**
272 * gss_mech_info2flavor - look up a pseudoflavor given a GSS tuple
273 * @info: a GSS mech OID, quality of protection, and service value
274 *
275 * Returns a matching pseudoflavor, or RPC_AUTH_MAXFLAVOR if the tuple is
276 * not supported.
277 */
278rpc_authflavor_t gss_mech_info2flavor(struct rpcsec_gss_info *info)
279{
280	rpc_authflavor_t pseudoflavor;
281	struct gss_api_mech *gm;
282
283	gm = gss_mech_get_by_OID(&info->oid);
284	if (gm == NULL)
285		return RPC_AUTH_MAXFLAVOR;
286
287	pseudoflavor = gss_svc_to_pseudoflavor(gm, info->qop, info->service);
288
289	gss_mech_put(gm);
290	return pseudoflavor;
291}
292
293/**
294 * gss_mech_flavor2info - look up a GSS tuple for a given pseudoflavor
295 * @pseudoflavor: GSS pseudoflavor to match
296 * @info: rpcsec_gss_info structure to fill in
297 *
298 * Returns zero and fills in "info" if pseudoflavor matches a
299 * supported mechanism.  Otherwise a negative errno is returned.
300 */
301int gss_mech_flavor2info(rpc_authflavor_t pseudoflavor,
302			 struct rpcsec_gss_info *info)
303{
304	struct gss_api_mech *gm;
305	int i;
306
307	gm = gss_mech_get_by_pseudoflavor(pseudoflavor);
308	if (gm == NULL)
309		return -ENOENT;
310
311	for (i = 0; i < gm->gm_pf_num; i++) {
312		if (gm->gm_pfs[i].pseudoflavor == pseudoflavor) {
313			memcpy(info->oid.data, gm->gm_oid.data, gm->gm_oid.len);
314			info->oid.len = gm->gm_oid.len;
315			info->qop = gm->gm_pfs[i].qop;
316			info->service = gm->gm_pfs[i].service;
317			gss_mech_put(gm);
318			return 0;
319		}
320	}
321
322	gss_mech_put(gm);
323	return -ENOENT;
324}
 
325
326u32
327gss_pseudoflavor_to_service(struct gss_api_mech *gm, u32 pseudoflavor)
328{
329	int i;
330
331	for (i = 0; i < gm->gm_pf_num; i++) {
332		if (gm->gm_pfs[i].pseudoflavor == pseudoflavor)
333			return gm->gm_pfs[i].service;
334	}
335	return 0;
336}
337EXPORT_SYMBOL(gss_pseudoflavor_to_service);
338
339bool
340gss_pseudoflavor_to_datatouch(struct gss_api_mech *gm, u32 pseudoflavor)
341{
342	int i;
343
344	for (i = 0; i < gm->gm_pf_num; i++) {
345		if (gm->gm_pfs[i].pseudoflavor == pseudoflavor)
346			return gm->gm_pfs[i].datatouch;
347	}
348	return false;
349}
350
351char *
352gss_service_to_auth_domain_name(struct gss_api_mech *gm, u32 service)
353{
354	int i;
355
356	for (i = 0; i < gm->gm_pf_num; i++) {
357		if (gm->gm_pfs[i].service == service)
358			return gm->gm_pfs[i].auth_domain_name;
359	}
360	return NULL;
361}
362
 
 
363void
364gss_mech_put(struct gss_api_mech * gm)
365{
366	if (gm)
367		module_put(gm->gm_owner);
368}
369EXPORT_SYMBOL(gss_mech_put);
 
370
371/* The mech could probably be determined from the token instead, but it's just
372 * as easy for now to pass it in. */
373int
374gss_import_sec_context(const void *input_token, size_t bufsize,
375		       struct gss_api_mech	*mech,
376		       struct gss_ctx		**ctx_id,
377		       time_t			*endtime,
378		       gfp_t gfp_mask)
379{
380	if (!(*ctx_id = kzalloc(sizeof(**ctx_id), gfp_mask)))
381		return -ENOMEM;
382	(*ctx_id)->mech_type = gss_mech_get(mech);
383
384	return mech->gm_ops->gss_import_sec_context(input_token, bufsize,
385						*ctx_id, endtime, gfp_mask);
386}
387
388/* gss_get_mic: compute a mic over message and return mic_token. */
389
390u32
391gss_get_mic(struct gss_ctx	*context_handle,
392	    struct xdr_buf	*message,
393	    struct xdr_netobj	*mic_token)
394{
395	 return context_handle->mech_type->gm_ops
396		->gss_get_mic(context_handle,
397			      message,
398			      mic_token);
399}
400
401/* gss_verify_mic: check whether the provided mic_token verifies message. */
402
403u32
404gss_verify_mic(struct gss_ctx		*context_handle,
405	       struct xdr_buf		*message,
406	       struct xdr_netobj	*mic_token)
407{
408	return context_handle->mech_type->gm_ops
409		->gss_verify_mic(context_handle,
410				 message,
411				 mic_token);
412}
413
414/*
415 * This function is called from both the client and server code.
416 * Each makes guarantees about how much "slack" space is available
417 * for the underlying function in "buf"'s head and tail while
418 * performing the wrap.
419 *
420 * The client and server code allocate RPC_MAX_AUTH_SIZE extra
421 * space in both the head and tail which is available for use by
422 * the wrap function.
423 *
424 * Underlying functions should verify they do not use more than
425 * RPC_MAX_AUTH_SIZE of extra space in either the head or tail
426 * when performing the wrap.
427 */
428u32
429gss_wrap(struct gss_ctx	*ctx_id,
430	 int		offset,
431	 struct xdr_buf	*buf,
432	 struct page	**inpages)
433{
434	return ctx_id->mech_type->gm_ops
435		->gss_wrap(ctx_id, offset, buf, inpages);
436}
437
438u32
439gss_unwrap(struct gss_ctx	*ctx_id,
440	   int			offset,
441	   struct xdr_buf	*buf)
442{
443	return ctx_id->mech_type->gm_ops
444		->gss_unwrap(ctx_id, offset, buf);
445}
446
447
448/* gss_delete_sec_context: free all resources associated with context_handle.
449 * Note this differs from the RFC 2744-specified prototype in that we don't
450 * bother returning an output token, since it would never be used anyway. */
451
452u32
453gss_delete_sec_context(struct gss_ctx	**context_handle)
454{
455	dprintk("RPC:       gss_delete_sec_context deleting %p\n",
456			*context_handle);
457
458	if (!*context_handle)
459		return GSS_S_NO_CONTEXT;
460	if ((*context_handle)->internal_ctx_id)
461		(*context_handle)->mech_type->gm_ops
462			->gss_delete_sec_context((*context_handle)
463							->internal_ctx_id);
464	gss_mech_put((*context_handle)->mech_type);
465	kfree(*context_handle);
466	*context_handle=NULL;
467	return GSS_S_COMPLETE;
468}

 
  1/*
  2 *  linux/net/sunrpc/gss_mech_switch.c
  3 *
  4 *  Copyright (c) 2001 The Regents of the University of Michigan.
  5 *  All rights reserved.
  6 *
  7 *  J. Bruce Fields   <bfields@umich.edu>
  8 *
  9 *  Redistribution and use in source and binary forms, with or without
 10 *  modification, are permitted provided that the following conditions
 11 *  are met:
 12 *
 13 *  1. Redistributions of source code must retain the above copyright
 14 *     notice, this list of conditions and the following disclaimer.
 15 *  2. Redistributions in binary form must reproduce the above copyright
 16 *     notice, this list of conditions and the following disclaimer in the
 17 *     documentation and/or other materials provided with the distribution.
 18 *  3. Neither the name of the University nor the names of its
 19 *     contributors may be used to endorse or promote products derived
 20 *     from this software without specific prior written permission.
 21 *
 22 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
 23 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 24 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 25 *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 26 *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 27 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 28 *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 29 *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 30 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 31 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 32 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 33 *
 34 */
 35
 36#include <linux/types.h>
 37#include <linux/slab.h>
 38#include <linux/module.h>
 
 39#include <linux/sunrpc/msg_prot.h>
 40#include <linux/sunrpc/gss_asn1.h>
 41#include <linux/sunrpc/auth_gss.h>
 42#include <linux/sunrpc/svcauth_gss.h>
 43#include <linux/sunrpc/gss_err.h>
 44#include <linux/sunrpc/sched.h>
 45#include <linux/sunrpc/gss_api.h>
 46#include <linux/sunrpc/clnt.h>
 47
 48#ifdef RPC_DEBUG
 49# define RPCDBG_FACILITY        RPCDBG_AUTH
 50#endif
 51
 52static LIST_HEAD(registered_mechs);
 53static DEFINE_SPINLOCK(registered_mechs_lock);
 54
 55static void
 56gss_mech_free(struct gss_api_mech *gm)
 57{
 58	struct pf_desc *pf;
 59	int i;
 60
 61	for (i = 0; i < gm->gm_pf_num; i++) {
 62		pf = &gm->gm_pfs[i];
 63		kfree(pf->auth_domain_name);
 64		pf->auth_domain_name = NULL;
 65	}
 66}
 67
 68static inline char *
 69make_auth_domain_name(char *name)
 70{
 71	static char	*prefix = "gss/";
 72	char		*new;
 73
 74	new = kmalloc(strlen(name) + strlen(prefix) + 1, GFP_KERNEL);
 75	if (new) {
 76		strcpy(new, prefix);
 77		strcat(new, name);
 78	}
 79	return new;
 80}
 81
 82static int
 83gss_mech_svc_setup(struct gss_api_mech *gm)
 84{
 85	struct pf_desc *pf;
 86	int i, status;
 87
 88	for (i = 0; i < gm->gm_pf_num; i++) {
 89		pf = &gm->gm_pfs[i];
 90		pf->auth_domain_name = make_auth_domain_name(pf->name);
 91		status = -ENOMEM;
 92		if (pf->auth_domain_name == NULL)
 93			goto out;
 94		status = svcauth_gss_register_pseudoflavor(pf->pseudoflavor,
 95							pf->auth_domain_name);
 96		if (status)
 97			goto out;
 98	}
 99	return 0;
100out:
101	gss_mech_free(gm);
102	return status;
103}
104
105int
106gss_mech_register(struct gss_api_mech *gm)
 
 
 
 
 
107{
108	int status;
109
110	status = gss_mech_svc_setup(gm);
111	if (status)
112		return status;
113	spin_lock(&registered_mechs_lock);
114	list_add(&gm->gm_list, &registered_mechs);
115	spin_unlock(&registered_mechs_lock);
116	dprintk("RPC:       registered gss mechanism %s\n", gm->gm_name);
117	return 0;
118}
119
120EXPORT_SYMBOL_GPL(gss_mech_register);
121
122void
123gss_mech_unregister(struct gss_api_mech *gm)
 
 
 
 
124{
125	spin_lock(&registered_mechs_lock);
126	list_del(&gm->gm_list);
127	spin_unlock(&registered_mechs_lock);
128	dprintk("RPC:       unregistered gss mechanism %s\n", gm->gm_name);
129	gss_mech_free(gm);
130}
131
132EXPORT_SYMBOL_GPL(gss_mech_unregister);
133
134struct gss_api_mech *
135gss_mech_get(struct gss_api_mech *gm)
136{
137	__module_get(gm->gm_owner);
138	return gm;
139}
 
140
141EXPORT_SYMBOL_GPL(gss_mech_get);
142
143struct gss_api_mech *
144_gss_mech_get_by_name(const char *name)
145{
146	struct gss_api_mech	*pos, *gm = NULL;
147
148	spin_lock(&registered_mechs_lock);
149	list_for_each_entry(pos, &registered_mechs, gm_list) {
150		if (0 == strcmp(name, pos->gm_name)) {
151			if (try_module_get(pos->gm_owner))
152				gm = pos;
153			break;
154		}
155	}
156	spin_unlock(&registered_mechs_lock);
157	return gm;
158
159}
160
161struct gss_api_mech * gss_mech_get_by_name(const char *name)
162{
163	struct gss_api_mech *gm = NULL;
164
165	gm = _gss_mech_get_by_name(name);
166	if (!gm) {
167		request_module("rpc-auth-gss-%s", name);
168		gm = _gss_mech_get_by_name(name);
169	}
170	return gm;
171}
172EXPORT_SYMBOL_GPL(gss_mech_get_by_name);
173
174struct gss_api_mech *
175gss_mech_get_by_OID(struct xdr_netobj *obj)
176{
177	struct gss_api_mech	*pos, *gm = NULL;
 
178
179	spin_lock(&registered_mechs_lock);
180	list_for_each_entry(pos, &registered_mechs, gm_list) {
 
 
 
 
 
181		if (obj->len == pos->gm_oid.len) {
182			if (0 == memcmp(obj->data, pos->gm_oid.data, obj->len)) {
183				if (try_module_get(pos->gm_owner))
184					gm = pos;
185				break;
186			}
187		}
188	}
189	spin_unlock(&registered_mechs_lock);
190	return gm;
191
192}
193
194EXPORT_SYMBOL_GPL(gss_mech_get_by_OID);
195
196static inline int
197mech_supports_pseudoflavor(struct gss_api_mech *gm, u32 pseudoflavor)
198{
199	int i;
200
201	for (i = 0; i < gm->gm_pf_num; i++) {
202		if (gm->gm_pfs[i].pseudoflavor == pseudoflavor)
203			return 1;
204	}
205	return 0;
206}
207
208struct gss_api_mech *_gss_mech_get_by_pseudoflavor(u32 pseudoflavor)
209{
210	struct gss_api_mech *gm = NULL, *pos;
211
212	spin_lock(&registered_mechs_lock);
213	list_for_each_entry(pos, &registered_mechs, gm_list) {
214		if (!mech_supports_pseudoflavor(pos, pseudoflavor)) {
215			module_put(pos->gm_owner);
216			continue;
217		}
218		if (try_module_get(pos->gm_owner))
219			gm = pos;
220		break;
221	}
222	spin_unlock(&registered_mechs_lock);
223	return gm;
224}
225
226struct gss_api_mech *
227gss_mech_get_by_pseudoflavor(u32 pseudoflavor)
228{
229	struct gss_api_mech *gm;
230
231	gm = _gss_mech_get_by_pseudoflavor(pseudoflavor);
232
233	if (!gm) {
234		request_module("rpc-auth-gss-%u", pseudoflavor);
235		gm = _gss_mech_get_by_pseudoflavor(pseudoflavor);
236	}
237	return gm;
238}
239
240EXPORT_SYMBOL_GPL(gss_mech_get_by_pseudoflavor);
241
242int gss_mech_list_pseudoflavors(rpc_authflavor_t *array_ptr)
 
 
 
 
 
 
 
 
243{
244	struct gss_api_mech *pos = NULL;
245	int i = 0;
246
247	spin_lock(&registered_mechs_lock);
248	list_for_each_entry(pos, &registered_mechs, gm_list) {
249		array_ptr[i] = pos->gm_pfs->pseudoflavor;
250		i++;
 
 
 
 
 
251	}
252	spin_unlock(&registered_mechs_lock);
253	return i;
254}
255
256EXPORT_SYMBOL_GPL(gss_mech_list_pseudoflavors);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
257
258u32
259gss_svc_to_pseudoflavor(struct gss_api_mech *gm, u32 service)
 
 
 
 
 
 
 
 
260{
 
261	int i;
262
 
 
 
 
263	for (i = 0; i < gm->gm_pf_num; i++) {
264		if (gm->gm_pfs[i].service == service) {
265			return gm->gm_pfs[i].pseudoflavor;
 
 
 
 
 
266		}
267	}
268	return RPC_AUTH_MAXFLAVOR; /* illegal value */
 
 
269}
270EXPORT_SYMBOL_GPL(gss_svc_to_pseudoflavor);
271
272u32
273gss_pseudoflavor_to_service(struct gss_api_mech *gm, u32 pseudoflavor)
274{
275	int i;
276
277	for (i = 0; i < gm->gm_pf_num; i++) {
278		if (gm->gm_pfs[i].pseudoflavor == pseudoflavor)
279			return gm->gm_pfs[i].service;
280	}
281	return 0;
282}
 
283
284EXPORT_SYMBOL_GPL(gss_pseudoflavor_to_service);
 
 
 
 
 
 
 
 
 
 
285
286char *
287gss_service_to_auth_domain_name(struct gss_api_mech *gm, u32 service)
288{
289	int i;
290
291	for (i = 0; i < gm->gm_pf_num; i++) {
292		if (gm->gm_pfs[i].service == service)
293			return gm->gm_pfs[i].auth_domain_name;
294	}
295	return NULL;
296}
297
298EXPORT_SYMBOL_GPL(gss_service_to_auth_domain_name);
299
300void
301gss_mech_put(struct gss_api_mech * gm)
302{
303	if (gm)
304		module_put(gm->gm_owner);
305}
306
307EXPORT_SYMBOL_GPL(gss_mech_put);
308
309/* The mech could probably be determined from the token instead, but it's just
310 * as easy for now to pass it in. */
311int
312gss_import_sec_context(const void *input_token, size_t bufsize,
313		       struct gss_api_mech	*mech,
314		       struct gss_ctx		**ctx_id,
 
315		       gfp_t gfp_mask)
316{
317	if (!(*ctx_id = kzalloc(sizeof(**ctx_id), gfp_mask)))
318		return -ENOMEM;
319	(*ctx_id)->mech_type = gss_mech_get(mech);
320
321	return mech->gm_ops
322		->gss_import_sec_context(input_token, bufsize, *ctx_id, gfp_mask);
323}
324
325/* gss_get_mic: compute a mic over message and return mic_token. */
326
327u32
328gss_get_mic(struct gss_ctx	*context_handle,
329	    struct xdr_buf	*message,
330	    struct xdr_netobj	*mic_token)
331{
332	 return context_handle->mech_type->gm_ops
333		->gss_get_mic(context_handle,
334			      message,
335			      mic_token);
336}
337
338/* gss_verify_mic: check whether the provided mic_token verifies message. */
339
340u32
341gss_verify_mic(struct gss_ctx		*context_handle,
342	       struct xdr_buf		*message,
343	       struct xdr_netobj	*mic_token)
344{
345	return context_handle->mech_type->gm_ops
346		->gss_verify_mic(context_handle,
347				 message,
348				 mic_token);
349}
350
351/*
352 * This function is called from both the client and server code.
353 * Each makes guarantees about how much "slack" space is available
354 * for the underlying function in "buf"'s head and tail while
355 * performing the wrap.
356 *
357 * The client and server code allocate RPC_MAX_AUTH_SIZE extra
358 * space in both the head and tail which is available for use by
359 * the wrap function.
360 *
361 * Underlying functions should verify they do not use more than
362 * RPC_MAX_AUTH_SIZE of extra space in either the head or tail
363 * when performing the wrap.
364 */
365u32
366gss_wrap(struct gss_ctx	*ctx_id,
367	 int		offset,
368	 struct xdr_buf	*buf,
369	 struct page	**inpages)
370{
371	return ctx_id->mech_type->gm_ops
372		->gss_wrap(ctx_id, offset, buf, inpages);
373}
374
375u32
376gss_unwrap(struct gss_ctx	*ctx_id,
377	   int			offset,
378	   struct xdr_buf	*buf)
379{
380	return ctx_id->mech_type->gm_ops
381		->gss_unwrap(ctx_id, offset, buf);
382}
383
384
385/* gss_delete_sec_context: free all resources associated with context_handle.
386 * Note this differs from the RFC 2744-specified prototype in that we don't
387 * bother returning an output token, since it would never be used anyway. */
388
389u32
390gss_delete_sec_context(struct gss_ctx	**context_handle)
391{
392	dprintk("RPC:       gss_delete_sec_context deleting %p\n",
393			*context_handle);
394
395	if (!*context_handle)
396		return GSS_S_NO_CONTEXT;
397	if ((*context_handle)->internal_ctx_id)
398		(*context_handle)->mech_type->gm_ops
399			->gss_delete_sec_context((*context_handle)
400							->internal_ctx_id);
401	gss_mech_put((*context_handle)->mech_type);
402	kfree(*context_handle);
403	*context_handle=NULL;
404	return GSS_S_COMPLETE;
405}