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
47 #include <linux/init.h>
48 #include <linux/module.h>
49 #include <linux/slab.h>
50 #include <linux/mutex.h>
53 #include <obd_class.h>
54 #include <obd_support.h>
55 #include <lustre_net.h>
56 #include <lustre_import.h>
57 #include <lustre_sec.h>
60 #include "gss_internal.h"
63 static struct list_head registered_mechs = LIST_HEAD_INIT(registered_mechs);
64 static DEFINE_SPINLOCK(registered_mechs_lock);
66 int lgss_mech_register(struct gss_api_mech *gm)
68 spin_lock(®istered_mechs_lock);
69 list_add(&gm->gm_list, ®istered_mechs);
70 spin_unlock(®istered_mechs_lock);
71 CDEBUG(D_SEC, "register %s mechanism\n", gm->gm_name);
75 void lgss_mech_unregister(struct gss_api_mech *gm)
77 spin_lock(®istered_mechs_lock);
78 list_del(&gm->gm_list);
79 spin_unlock(®istered_mechs_lock);
80 CDEBUG(D_SEC, "Unregister %s mechanism\n", gm->gm_name);
84 struct gss_api_mech *lgss_mech_get(struct gss_api_mech *gm)
86 __module_get(gm->gm_owner);
90 struct gss_api_mech *lgss_name_to_mech(char *name)
92 struct gss_api_mech *pos, *gm = NULL;
94 spin_lock(®istered_mechs_lock);
95 list_for_each_entry(pos, ®istered_mechs, gm_list) {
96 if (0 == strcmp(name, pos->gm_name)) {
97 if (!try_module_get(pos->gm_owner))
103 spin_unlock(®istered_mechs_lock);
109 int mech_supports_subflavor(struct gss_api_mech *gm, __u32 subflavor)
113 for (i = 0; i < gm->gm_sf_num; i++) {
114 if (gm->gm_sfs[i].sf_subflavor == subflavor)
120 struct gss_api_mech *lgss_subflavor_to_mech(__u32 subflavor)
122 struct gss_api_mech *pos, *gm = NULL;
124 spin_lock(®istered_mechs_lock);
125 list_for_each_entry(pos, ®istered_mechs, gm_list) {
126 if (!try_module_get(pos->gm_owner))
128 if (!mech_supports_subflavor(pos, subflavor)) {
129 module_put(pos->gm_owner);
135 spin_unlock(®istered_mechs_lock);
139 void lgss_mech_put(struct gss_api_mech *gm)
141 module_put(gm->gm_owner);
144 /* The mech could probably be determined from the token instead, but it's just
145 * as easy for now to pass it in. */
146 __u32 lgss_import_sec_context(rawobj_t *input_token,
147 struct gss_api_mech *mech,
148 struct gss_ctx **ctx_id)
150 OBD_ALLOC_PTR(*ctx_id);
152 return GSS_S_FAILURE;
154 (*ctx_id)->mech_type = lgss_mech_get(mech);
157 LASSERT(mech->gm_ops);
158 LASSERT(mech->gm_ops->gss_import_sec_context);
159 return mech->gm_ops->gss_import_sec_context(input_token, *ctx_id);
162 __u32 lgss_copy_reverse_context(struct gss_ctx *ctx_id,
163 struct gss_ctx **ctx_id_new)
165 struct gss_api_mech *mech = ctx_id->mech_type;
170 OBD_ALLOC_PTR(*ctx_id_new);
171 if (*ctx_id_new == NULL)
172 return GSS_S_FAILURE;
174 (*ctx_id_new)->mech_type = lgss_mech_get(mech);
177 LASSERT(mech->gm_ops);
178 LASSERT(mech->gm_ops->gss_copy_reverse_context);
180 major = mech->gm_ops->gss_copy_reverse_context(ctx_id, *ctx_id_new);
181 if (major != GSS_S_COMPLETE) {
183 OBD_FREE_PTR(*ctx_id_new);
190 * this interface is much simplified, currently we only need endtime.
192 __u32 lgss_inquire_context(struct gss_ctx *context_handle,
195 LASSERT(context_handle);
196 LASSERT(context_handle->mech_type);
197 LASSERT(context_handle->mech_type->gm_ops);
198 LASSERT(context_handle->mech_type->gm_ops->gss_inquire_context);
200 return context_handle->mech_type->gm_ops
201 ->gss_inquire_context(context_handle,
205 /* gss_get_mic: compute a mic over message and return mic_token. */
206 __u32 lgss_get_mic(struct gss_ctx *context_handle,
213 LASSERT(context_handle);
214 LASSERT(context_handle->mech_type);
215 LASSERT(context_handle->mech_type->gm_ops);
216 LASSERT(context_handle->mech_type->gm_ops->gss_get_mic);
218 return context_handle->mech_type->gm_ops
219 ->gss_get_mic(context_handle,
227 /* gss_verify_mic: check whether the provided mic_token verifies message. */
228 __u32 lgss_verify_mic(struct gss_ctx *context_handle,
235 LASSERT(context_handle);
236 LASSERT(context_handle->mech_type);
237 LASSERT(context_handle->mech_type->gm_ops);
238 LASSERT(context_handle->mech_type->gm_ops->gss_verify_mic);
240 return context_handle->mech_type->gm_ops
241 ->gss_verify_mic(context_handle,
249 __u32 lgss_wrap(struct gss_ctx *context_handle,
255 LASSERT(context_handle);
256 LASSERT(context_handle->mech_type);
257 LASSERT(context_handle->mech_type->gm_ops);
258 LASSERT(context_handle->mech_type->gm_ops->gss_wrap);
260 return context_handle->mech_type->gm_ops
261 ->gss_wrap(context_handle, gsshdr, msg, msg_buflen, out_token);
264 __u32 lgss_unwrap(struct gss_ctx *context_handle,
269 LASSERT(context_handle);
270 LASSERT(context_handle->mech_type);
271 LASSERT(context_handle->mech_type->gm_ops);
272 LASSERT(context_handle->mech_type->gm_ops->gss_unwrap);
274 return context_handle->mech_type->gm_ops
275 ->gss_unwrap(context_handle, gsshdr, token, out_msg);
279 __u32 lgss_prep_bulk(struct gss_ctx *context_handle,
280 struct ptlrpc_bulk_desc *desc)
282 LASSERT(context_handle);
283 LASSERT(context_handle->mech_type);
284 LASSERT(context_handle->mech_type->gm_ops);
285 LASSERT(context_handle->mech_type->gm_ops->gss_prep_bulk);
287 return context_handle->mech_type->gm_ops
288 ->gss_prep_bulk(context_handle, desc);
291 __u32 lgss_wrap_bulk(struct gss_ctx *context_handle,
292 struct ptlrpc_bulk_desc *desc,
296 LASSERT(context_handle);
297 LASSERT(context_handle->mech_type);
298 LASSERT(context_handle->mech_type->gm_ops);
299 LASSERT(context_handle->mech_type->gm_ops->gss_wrap_bulk);
301 return context_handle->mech_type->gm_ops
302 ->gss_wrap_bulk(context_handle, desc, token, adj_nob);
305 __u32 lgss_unwrap_bulk(struct gss_ctx *context_handle,
306 struct ptlrpc_bulk_desc *desc,
310 LASSERT(context_handle);
311 LASSERT(context_handle->mech_type);
312 LASSERT(context_handle->mech_type->gm_ops);
313 LASSERT(context_handle->mech_type->gm_ops->gss_unwrap_bulk);
315 return context_handle->mech_type->gm_ops
316 ->gss_unwrap_bulk(context_handle, desc, token, adj_nob);
319 /* gss_delete_sec_context: free all resources associated with context_handle.
320 * Note this differs from the RFC 2744-specified prototype in that we don't
321 * bother returning an output token, since it would never be used anyway. */
323 __u32 lgss_delete_sec_context(struct gss_ctx **context_handle)
325 struct gss_api_mech *mech;
327 if (!*context_handle)
328 return GSS_S_NO_CONTEXT;
330 CDEBUG(D_SEC, "deleting %p\n", *context_handle);
332 mech = (*context_handle)->mech_type;
333 if ((*context_handle)->internal_ctx_id != NULL) {
335 LASSERT(mech->gm_ops);
336 LASSERT(mech->gm_ops->gss_delete_sec_context);
337 mech->gm_ops->gss_delete_sec_context(
338 (*context_handle)->internal_ctx_id);
343 OBD_FREE_PTR(*context_handle);
344 *context_handle = NULL;
345 return GSS_S_COMPLETE;
348 int lgss_display(struct gss_ctx *ctx,
353 LASSERT(ctx->mech_type);
354 LASSERT(ctx->mech_type->gm_ops);
355 LASSERT(ctx->mech_type->gm_ops->gss_display);
357 return ctx->mech_type->gm_ops->gss_display(ctx, buf, bufsize);