1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Modifications for Lustre
5 * Copyright 2004 - 2006, Cluster File Systems, Inc.
7 * Author: Eric Mei <ericm@clusterfs.com>
11 * linux/net/sunrpc/gss_mech_switch.c
13 * Copyright (c) 2001 The Regents of the University of Michigan.
14 * All rights reserved.
16 * J. Bruce Fields <bfields@umich.edu>
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions
22 * 1. Redistributions of source code must retain the above copyright
23 * notice, this list of conditions and the following disclaimer.
24 * 2. Redistributions in binary form must reproduce the above copyright
25 * notice, this list of conditions and the following disclaimer in the
26 * documentation and/or other materials provided with the distribution.
27 * 3. Neither the name of the University nor the names of its
28 * contributors may be used to endorse or promote products derived
29 * from this software without specific prior written permission.
31 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
32 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
33 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
34 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
35 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
36 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
37 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
38 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
39 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
40 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
41 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
46 # define EXPORT_SYMTAB
48 #define DEBUG_SUBSYSTEM S_SEC
50 #include <linux/init.h>
51 #include <linux/module.h>
52 #include <linux/slab.h>
53 #include <linux/mutex.h>
55 #include <liblustre.h>
59 #include <obd_class.h>
60 #include <obd_support.h>
61 #include <lustre/lustre_idl.h>
62 #include <lustre_net.h>
63 #include <lustre_import.h>
64 #include <lustre_sec.h>
67 #include "gss_internal.h"
70 static CFS_LIST_HEAD(registered_mechs);
71 static spinlock_t registered_mechs_lock = SPIN_LOCK_UNLOCKED;
73 int lgss_mech_register(struct gss_api_mech *gm)
75 spin_lock(®istered_mechs_lock);
76 list_add(&gm->gm_list, ®istered_mechs);
77 spin_unlock(®istered_mechs_lock);
78 CWARN("Register %s mechanism\n", gm->gm_name);
82 void lgss_mech_unregister(struct gss_api_mech *gm)
84 spin_lock(®istered_mechs_lock);
85 list_del(&gm->gm_list);
86 spin_unlock(®istered_mechs_lock);
87 CWARN("Unregister %s mechanism\n", gm->gm_name);
91 struct gss_api_mech *lgss_mech_get(struct gss_api_mech *gm)
93 __module_get(gm->gm_owner);
97 struct gss_api_mech *lgss_name_to_mech(char *name)
99 struct gss_api_mech *pos, *gm = NULL;
101 spin_lock(®istered_mechs_lock);
102 list_for_each_entry(pos, ®istered_mechs, gm_list) {
103 if (0 == strcmp(name, pos->gm_name)) {
104 if (!try_module_get(pos->gm_owner))
110 spin_unlock(®istered_mechs_lock);
116 int mech_supports_subflavor(struct gss_api_mech *gm, __u32 subflavor)
120 for (i = 0; i < gm->gm_sf_num; i++) {
121 if (gm->gm_sfs[i].sf_subflavor == subflavor)
127 struct gss_api_mech *lgss_subflavor_to_mech(__u32 subflavor)
129 struct gss_api_mech *pos, *gm = NULL;
131 spin_lock(®istered_mechs_lock);
132 list_for_each_entry(pos, ®istered_mechs, gm_list) {
133 if (!try_module_get(pos->gm_owner))
135 if (!mech_supports_subflavor(pos, subflavor)) {
136 module_put(pos->gm_owner);
142 spin_unlock(®istered_mechs_lock);
146 void lgss_mech_put(struct gss_api_mech *gm)
148 module_put(gm->gm_owner);
151 /* The mech could probably be determined from the token instead, but it's just
152 * as easy for now to pass it in. */
153 __u32 lgss_import_sec_context(rawobj_t *input_token,
154 struct gss_api_mech *mech,
155 struct gss_ctx **ctx_id)
157 OBD_ALLOC_PTR(*ctx_id);
159 return GSS_S_FAILURE;
161 (*ctx_id)->mech_type = lgss_mech_get(mech);
164 LASSERT(mech->gm_ops);
165 LASSERT(mech->gm_ops->gss_import_sec_context);
166 return mech->gm_ops->gss_import_sec_context(input_token, *ctx_id);
169 __u32 lgss_copy_reverse_context(struct gss_ctx *ctx_id,
170 struct gss_ctx **ctx_id_new)
172 struct gss_api_mech *mech = ctx_id->mech_type;
177 OBD_ALLOC_PTR(*ctx_id_new);
178 if (*ctx_id_new == NULL)
179 return GSS_S_FAILURE;
181 (*ctx_id_new)->mech_type = lgss_mech_get(mech);
184 LASSERT(mech->gm_ops);
185 LASSERT(mech->gm_ops->gss_copy_reverse_context);
187 major = mech->gm_ops->gss_copy_reverse_context(ctx_id, *ctx_id_new);
188 if (major != GSS_S_COMPLETE) {
190 OBD_FREE_PTR(*ctx_id_new);
197 * this interface is much simplified, currently we only need endtime.
199 __u32 lgss_inquire_context(struct gss_ctx *context_handle,
200 unsigned long *endtime)
202 LASSERT(context_handle);
203 LASSERT(context_handle->mech_type);
204 LASSERT(context_handle->mech_type->gm_ops);
205 LASSERT(context_handle->mech_type->gm_ops->gss_inquire_context);
207 return context_handle->mech_type->gm_ops
208 ->gss_inquire_context(context_handle,
212 /* gss_get_mic: compute a mic over message and return mic_token. */
213 __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,
230 /* gss_verify_mic: check whether the provided mic_token verifies message. */
231 __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,
248 __u32 lgss_wrap(struct gss_ctx *context_handle,
254 LASSERT(context_handle);
255 LASSERT(context_handle->mech_type);
256 LASSERT(context_handle->mech_type->gm_ops);
257 LASSERT(context_handle->mech_type->gm_ops->gss_wrap);
259 return context_handle->mech_type->gm_ops
260 ->gss_wrap(context_handle, gsshdr, msg, msg_buflen, out_token);
263 __u32 lgss_unwrap(struct gss_ctx *context_handle,
268 LASSERT(context_handle);
269 LASSERT(context_handle->mech_type);
270 LASSERT(context_handle->mech_type->gm_ops);
271 LASSERT(context_handle->mech_type->gm_ops->gss_unwrap);
273 return context_handle->mech_type->gm_ops
274 ->gss_unwrap(context_handle, gsshdr, token, out_msg);
278 __u32 lgss_plain_encrypt(struct gss_ctx *ctx,
285 LASSERT(ctx->mech_type);
286 LASSERT(ctx->mech_type->gm_ops);
287 LASSERT(ctx->mech_type->gm_ops->gss_plain_encrypt);
289 return ctx->mech_type->gm_ops
290 ->gss_plain_encrypt(ctx, decrypt, length, in_buf, out_buf);
293 /* gss_delete_sec_context: free all resources associated with context_handle.
294 * Note this differs from the RFC 2744-specified prototype in that we don't
295 * bother returning an output token, since it would never be used anyway. */
297 __u32 lgss_delete_sec_context(struct gss_ctx **context_handle)
299 struct gss_api_mech *mech;
301 CDEBUG(D_SEC, "deleting %p\n", *context_handle);
303 if (!*context_handle)
304 return(GSS_S_NO_CONTEXT);
306 mech = (*context_handle)->mech_type;
307 if ((*context_handle)->internal_ctx_id != 0) {
309 LASSERT(mech->gm_ops);
310 LASSERT(mech->gm_ops->gss_delete_sec_context);
311 mech->gm_ops->gss_delete_sec_context(
312 (*context_handle)->internal_ctx_id);
317 OBD_FREE_PTR(*context_handle);
318 *context_handle=NULL;
319 return GSS_S_COMPLETE;
322 int lgss_display(struct gss_ctx *ctx,
327 LASSERT(ctx->mech_type);
328 LASSERT(ctx->mech_type->gm_ops);
329 LASSERT(ctx->mech_type->gm_ops->gss_display);
331 return ctx->mech_type->gm_ops->gss_display(ctx, buf, bufsize);