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/lustre_idl.h>
56 #include <lustre_net.h>
57 #include <lustre_import.h>
58 #include <lustre_sec.h>
61 #include "gss_internal.h"
64 static struct list_head registered_mechs = LIST_HEAD_INIT(registered_mechs);
65 static DEFINE_SPINLOCK(registered_mechs_lock);
67 int lgss_mech_register(struct gss_api_mech *gm)
69 spin_lock(®istered_mechs_lock);
70 list_add(&gm->gm_list, ®istered_mechs);
71 spin_unlock(®istered_mechs_lock);
72 CWARN("Register %s mechanism\n", gm->gm_name);
76 void lgss_mech_unregister(struct gss_api_mech *gm)
78 spin_lock(®istered_mechs_lock);
79 list_del(&gm->gm_list);
80 spin_unlock(®istered_mechs_lock);
81 CWARN("Unregister %s mechanism\n", gm->gm_name);
85 struct gss_api_mech *lgss_mech_get(struct gss_api_mech *gm)
87 __module_get(gm->gm_owner);
91 struct gss_api_mech *lgss_name_to_mech(char *name)
93 struct gss_api_mech *pos, *gm = NULL;
95 spin_lock(®istered_mechs_lock);
96 list_for_each_entry(pos, ®istered_mechs, gm_list) {
97 if (0 == strcmp(name, pos->gm_name)) {
98 if (!try_module_get(pos->gm_owner))
104 spin_unlock(®istered_mechs_lock);
110 int mech_supports_subflavor(struct gss_api_mech *gm, __u32 subflavor)
114 for (i = 0; i < gm->gm_sf_num; i++) {
115 if (gm->gm_sfs[i].sf_subflavor == subflavor)
121 struct gss_api_mech *lgss_subflavor_to_mech(__u32 subflavor)
123 struct gss_api_mech *pos, *gm = NULL;
125 spin_lock(®istered_mechs_lock);
126 list_for_each_entry(pos, ®istered_mechs, gm_list) {
127 if (!try_module_get(pos->gm_owner))
129 if (!mech_supports_subflavor(pos, subflavor)) {
130 module_put(pos->gm_owner);
136 spin_unlock(®istered_mechs_lock);
140 void lgss_mech_put(struct gss_api_mech *gm)
142 module_put(gm->gm_owner);
145 /* The mech could probably be determined from the token instead, but it's just
146 * as easy for now to pass it in. */
147 __u32 lgss_import_sec_context(rawobj_t *input_token,
148 struct gss_api_mech *mech,
149 struct gss_ctx **ctx_id)
151 OBD_ALLOC_PTR(*ctx_id);
153 return GSS_S_FAILURE;
155 (*ctx_id)->mech_type = lgss_mech_get(mech);
158 LASSERT(mech->gm_ops);
159 LASSERT(mech->gm_ops->gss_import_sec_context);
160 return mech->gm_ops->gss_import_sec_context(input_token, *ctx_id);
163 __u32 lgss_copy_reverse_context(struct gss_ctx *ctx_id,
164 struct gss_ctx **ctx_id_new)
166 struct gss_api_mech *mech = ctx_id->mech_type;
171 OBD_ALLOC_PTR(*ctx_id_new);
172 if (*ctx_id_new == NULL)
173 return GSS_S_FAILURE;
175 (*ctx_id_new)->mech_type = lgss_mech_get(mech);
178 LASSERT(mech->gm_ops);
179 LASSERT(mech->gm_ops->gss_copy_reverse_context);
181 major = mech->gm_ops->gss_copy_reverse_context(ctx_id, *ctx_id_new);
182 if (major != GSS_S_COMPLETE) {
184 OBD_FREE_PTR(*ctx_id_new);
191 * this interface is much simplified, currently we only need endtime.
193 __u32 lgss_inquire_context(struct gss_ctx *context_handle,
194 unsigned long *endtime)
196 LASSERT(context_handle);
197 LASSERT(context_handle->mech_type);
198 LASSERT(context_handle->mech_type->gm_ops);
199 LASSERT(context_handle->mech_type->gm_ops->gss_inquire_context);
201 return context_handle->mech_type->gm_ops
202 ->gss_inquire_context(context_handle,
206 /* gss_get_mic: compute a mic over message and return mic_token. */
207 __u32 lgss_get_mic(struct gss_ctx *context_handle,
214 LASSERT(context_handle);
215 LASSERT(context_handle->mech_type);
216 LASSERT(context_handle->mech_type->gm_ops);
217 LASSERT(context_handle->mech_type->gm_ops->gss_get_mic);
219 return context_handle->mech_type->gm_ops
220 ->gss_get_mic(context_handle,
228 /* gss_verify_mic: check whether the provided mic_token verifies message. */
229 __u32 lgss_verify_mic(struct gss_ctx *context_handle,
236 LASSERT(context_handle);
237 LASSERT(context_handle->mech_type);
238 LASSERT(context_handle->mech_type->gm_ops);
239 LASSERT(context_handle->mech_type->gm_ops->gss_verify_mic);
241 return context_handle->mech_type->gm_ops
242 ->gss_verify_mic(context_handle,
250 __u32 lgss_wrap(struct gss_ctx *context_handle,
256 LASSERT(context_handle);
257 LASSERT(context_handle->mech_type);
258 LASSERT(context_handle->mech_type->gm_ops);
259 LASSERT(context_handle->mech_type->gm_ops->gss_wrap);
261 return context_handle->mech_type->gm_ops
262 ->gss_wrap(context_handle, gsshdr, msg, msg_buflen, out_token);
265 __u32 lgss_unwrap(struct gss_ctx *context_handle,
270 LASSERT(context_handle);
271 LASSERT(context_handle->mech_type);
272 LASSERT(context_handle->mech_type->gm_ops);
273 LASSERT(context_handle->mech_type->gm_ops->gss_unwrap);
275 return context_handle->mech_type->gm_ops
276 ->gss_unwrap(context_handle, gsshdr, token, out_msg);
280 __u32 lgss_prep_bulk(struct gss_ctx *context_handle,
281 struct ptlrpc_bulk_desc *desc)
283 LASSERT(context_handle);
284 LASSERT(context_handle->mech_type);
285 LASSERT(context_handle->mech_type->gm_ops);
286 LASSERT(context_handle->mech_type->gm_ops->gss_prep_bulk);
288 return context_handle->mech_type->gm_ops
289 ->gss_prep_bulk(context_handle, desc);
292 __u32 lgss_wrap_bulk(struct gss_ctx *context_handle,
293 struct ptlrpc_bulk_desc *desc,
297 LASSERT(context_handle);
298 LASSERT(context_handle->mech_type);
299 LASSERT(context_handle->mech_type->gm_ops);
300 LASSERT(context_handle->mech_type->gm_ops->gss_wrap_bulk);
302 return context_handle->mech_type->gm_ops
303 ->gss_wrap_bulk(context_handle, desc, token, adj_nob);
306 __u32 lgss_unwrap_bulk(struct gss_ctx *context_handle,
307 struct ptlrpc_bulk_desc *desc,
311 LASSERT(context_handle);
312 LASSERT(context_handle->mech_type);
313 LASSERT(context_handle->mech_type->gm_ops);
314 LASSERT(context_handle->mech_type->gm_ops->gss_unwrap_bulk);
316 return context_handle->mech_type->gm_ops
317 ->gss_unwrap_bulk(context_handle, desc, token, adj_nob);
320 /* gss_delete_sec_context: free all resources associated with context_handle.
321 * Note this differs from the RFC 2744-specified prototype in that we don't
322 * bother returning an output token, since it would never be used anyway. */
324 __u32 lgss_delete_sec_context(struct gss_ctx **context_handle)
326 struct gss_api_mech *mech;
328 if (!*context_handle)
329 return GSS_S_NO_CONTEXT;
331 CDEBUG(D_SEC, "deleting %p\n", *context_handle);
333 mech = (*context_handle)->mech_type;
334 if ((*context_handle)->internal_ctx_id != NULL) {
336 LASSERT(mech->gm_ops);
337 LASSERT(mech->gm_ops->gss_delete_sec_context);
338 mech->gm_ops->gss_delete_sec_context(
339 (*context_handle)->internal_ctx_id);
344 OBD_FREE_PTR(*context_handle);
345 *context_handle = NULL;
346 return GSS_S_COMPLETE;
349 int lgss_display(struct gss_ctx *ctx,
354 LASSERT(ctx->mech_type);
355 LASSERT(ctx->mech_type->gm_ops);
356 LASSERT(ctx->mech_type->gm_ops->gss_display);
358 return ctx->mech_type->gm_ops->gss_display(ctx, buf, bufsize);