2 * Modifications for Lustre
4 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
6 * Copyright (c) 2012, Intel Corporation.
8 * Author: Eric Mei <ericm@clusterfs.com>
12 * linux/net/sunrpc/gss_mech_switch.c
14 * Copyright (c) 2001 The Regents of the University of Michigan.
15 * All rights reserved.
17 * J. Bruce Fields <bfields@umich.edu>
19 * Redistribution and use in source and binary forms, with or without
20 * modification, are permitted provided that the following conditions
23 * 1. Redistributions of source code must retain the above copyright
24 * notice, this list of conditions and the following disclaimer.
25 * 2. Redistributions in binary form must reproduce the above copyright
26 * notice, this list of conditions and the following disclaimer in the
27 * documentation and/or other materials provided with the distribution.
28 * 3. Neither the name of the University nor the names of its
29 * contributors may be used to endorse or promote products derived
30 * from this software without specific prior written permission.
32 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
33 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
34 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
35 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
36 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
37 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
38 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
39 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
40 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
41 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
42 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
46 #define DEBUG_SUBSYSTEM S_SEC
48 #include <linux/init.h>
49 #include <linux/module.h>
50 #include <linux/slab.h>
51 #include <linux/mutex.h>
53 #include <liblustre.h>
57 #include <obd_class.h>
58 #include <obd_support.h>
59 #include <lustre/lustre_idl.h>
60 #include <lustre_net.h>
61 #include <lustre_import.h>
62 #include <lustre_sec.h>
65 #include "gss_internal.h"
68 static CFS_LIST_HEAD(registered_mechs);
69 static DEFINE_SPINLOCK(registered_mechs_lock);
71 int lgss_mech_register(struct gss_api_mech *gm)
73 spin_lock(®istered_mechs_lock);
74 cfs_list_add(&gm->gm_list, ®istered_mechs);
75 spin_unlock(®istered_mechs_lock);
76 CWARN("Register %s mechanism\n", gm->gm_name);
80 void lgss_mech_unregister(struct gss_api_mech *gm)
82 spin_lock(®istered_mechs_lock);
83 cfs_list_del(&gm->gm_list);
84 spin_unlock(®istered_mechs_lock);
85 CWARN("Unregister %s mechanism\n", gm->gm_name);
89 struct gss_api_mech *lgss_mech_get(struct gss_api_mech *gm)
91 __cfs_module_get(gm->gm_owner);
95 struct gss_api_mech *lgss_name_to_mech(char *name)
97 struct gss_api_mech *pos, *gm = NULL;
99 spin_lock(®istered_mechs_lock);
100 cfs_list_for_each_entry(pos, ®istered_mechs, gm_list) {
101 if (0 == strcmp(name, pos->gm_name)) {
102 if (!cfs_try_module_get(pos->gm_owner))
108 spin_unlock(®istered_mechs_lock);
114 int mech_supports_subflavor(struct gss_api_mech *gm, __u32 subflavor)
118 for (i = 0; i < gm->gm_sf_num; i++) {
119 if (gm->gm_sfs[i].sf_subflavor == subflavor)
125 struct gss_api_mech *lgss_subflavor_to_mech(__u32 subflavor)
127 struct gss_api_mech *pos, *gm = NULL;
129 spin_lock(®istered_mechs_lock);
130 cfs_list_for_each_entry(pos, ®istered_mechs, gm_list) {
131 if (!cfs_try_module_get(pos->gm_owner))
133 if (!mech_supports_subflavor(pos, subflavor)) {
134 cfs_module_put(pos->gm_owner);
140 spin_unlock(®istered_mechs_lock);
144 void lgss_mech_put(struct gss_api_mech *gm)
146 cfs_module_put(gm->gm_owner);
149 /* The mech could probably be determined from the token instead, but it's just
150 * as easy for now to pass it in. */
151 __u32 lgss_import_sec_context(rawobj_t *input_token,
152 struct gss_api_mech *mech,
153 struct gss_ctx **ctx_id)
155 OBD_ALLOC_PTR(*ctx_id);
157 return GSS_S_FAILURE;
159 (*ctx_id)->mech_type = lgss_mech_get(mech);
162 LASSERT(mech->gm_ops);
163 LASSERT(mech->gm_ops->gss_import_sec_context);
164 return mech->gm_ops->gss_import_sec_context(input_token, *ctx_id);
167 __u32 lgss_copy_reverse_context(struct gss_ctx *ctx_id,
168 struct gss_ctx **ctx_id_new)
170 struct gss_api_mech *mech = ctx_id->mech_type;
175 OBD_ALLOC_PTR(*ctx_id_new);
176 if (*ctx_id_new == NULL)
177 return GSS_S_FAILURE;
179 (*ctx_id_new)->mech_type = lgss_mech_get(mech);
182 LASSERT(mech->gm_ops);
183 LASSERT(mech->gm_ops->gss_copy_reverse_context);
185 major = mech->gm_ops->gss_copy_reverse_context(ctx_id, *ctx_id_new);
186 if (major != GSS_S_COMPLETE) {
188 OBD_FREE_PTR(*ctx_id_new);
195 * this interface is much simplified, currently we only need endtime.
197 __u32 lgss_inquire_context(struct gss_ctx *context_handle,
198 unsigned long *endtime)
200 LASSERT(context_handle);
201 LASSERT(context_handle->mech_type);
202 LASSERT(context_handle->mech_type->gm_ops);
203 LASSERT(context_handle->mech_type->gm_ops->gss_inquire_context);
205 return context_handle->mech_type->gm_ops
206 ->gss_inquire_context(context_handle,
210 /* gss_get_mic: compute a mic over message and return mic_token. */
211 __u32 lgss_get_mic(struct gss_ctx *context_handle,
218 LASSERT(context_handle);
219 LASSERT(context_handle->mech_type);
220 LASSERT(context_handle->mech_type->gm_ops);
221 LASSERT(context_handle->mech_type->gm_ops->gss_get_mic);
223 return context_handle->mech_type->gm_ops
224 ->gss_get_mic(context_handle,
232 /* gss_verify_mic: check whether the provided mic_token verifies message. */
233 __u32 lgss_verify_mic(struct gss_ctx *context_handle,
240 LASSERT(context_handle);
241 LASSERT(context_handle->mech_type);
242 LASSERT(context_handle->mech_type->gm_ops);
243 LASSERT(context_handle->mech_type->gm_ops->gss_verify_mic);
245 return context_handle->mech_type->gm_ops
246 ->gss_verify_mic(context_handle,
254 __u32 lgss_wrap(struct gss_ctx *context_handle,
260 LASSERT(context_handle);
261 LASSERT(context_handle->mech_type);
262 LASSERT(context_handle->mech_type->gm_ops);
263 LASSERT(context_handle->mech_type->gm_ops->gss_wrap);
265 return context_handle->mech_type->gm_ops
266 ->gss_wrap(context_handle, gsshdr, msg, msg_buflen, out_token);
269 __u32 lgss_unwrap(struct gss_ctx *context_handle,
274 LASSERT(context_handle);
275 LASSERT(context_handle->mech_type);
276 LASSERT(context_handle->mech_type->gm_ops);
277 LASSERT(context_handle->mech_type->gm_ops->gss_unwrap);
279 return context_handle->mech_type->gm_ops
280 ->gss_unwrap(context_handle, gsshdr, token, out_msg);
284 __u32 lgss_prep_bulk(struct gss_ctx *context_handle,
285 struct ptlrpc_bulk_desc *desc)
287 LASSERT(context_handle);
288 LASSERT(context_handle->mech_type);
289 LASSERT(context_handle->mech_type->gm_ops);
290 LASSERT(context_handle->mech_type->gm_ops->gss_prep_bulk);
292 return context_handle->mech_type->gm_ops
293 ->gss_prep_bulk(context_handle, desc);
296 __u32 lgss_wrap_bulk(struct gss_ctx *context_handle,
297 struct ptlrpc_bulk_desc *desc,
301 LASSERT(context_handle);
302 LASSERT(context_handle->mech_type);
303 LASSERT(context_handle->mech_type->gm_ops);
304 LASSERT(context_handle->mech_type->gm_ops->gss_wrap_bulk);
306 return context_handle->mech_type->gm_ops
307 ->gss_wrap_bulk(context_handle, desc, token, adj_nob);
310 __u32 lgss_unwrap_bulk(struct gss_ctx *context_handle,
311 struct ptlrpc_bulk_desc *desc,
315 LASSERT(context_handle);
316 LASSERT(context_handle->mech_type);
317 LASSERT(context_handle->mech_type->gm_ops);
318 LASSERT(context_handle->mech_type->gm_ops->gss_unwrap_bulk);
320 return context_handle->mech_type->gm_ops
321 ->gss_unwrap_bulk(context_handle, desc, token, adj_nob);
324 /* gss_delete_sec_context: free all resources associated with context_handle.
325 * Note this differs from the RFC 2744-specified prototype in that we don't
326 * bother returning an output token, since it would never be used anyway. */
328 __u32 lgss_delete_sec_context(struct gss_ctx **context_handle)
330 struct gss_api_mech *mech;
332 CDEBUG(D_SEC, "deleting %p\n", *context_handle);
334 if (!*context_handle)
335 return(GSS_S_NO_CONTEXT);
337 mech = (*context_handle)->mech_type;
338 if ((*context_handle)->internal_ctx_id != 0) {
340 LASSERT(mech->gm_ops);
341 LASSERT(mech->gm_ops->gss_delete_sec_context);
342 mech->gm_ops->gss_delete_sec_context(
343 (*context_handle)->internal_ctx_id);
348 OBD_FREE_PTR(*context_handle);
349 *context_handle=NULL;
350 return GSS_S_COMPLETE;
353 int lgss_display(struct gss_ctx *ctx,
358 LASSERT(ctx->mech_type);
359 LASSERT(ctx->mech_type->gm_ops);
360 LASSERT(ctx->mech_type->gm_ops->gss_display);
362 return ctx->mech_type->gm_ops->gss_display(ctx, buf, bufsize);