1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Modifications for Lustre
6 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
8 * Copyright (c) 2011, Whamcloud, Inc.
10 * Author: Eric Mei <ericm@clusterfs.com>
14 * Adapted in part from MIT Kerberos 5-1.2.1 slave/kprop.c and from
15 * http://docs.sun.com/?p=/doc/816-1331/6m7oo9sms&a=view
17 * Copyright (c) 2002 The Regents of the University of Michigan.
18 * All rights reserved.
20 * Andy Adamson <andros@umich.edu>
21 * J. Bruce Fields <bfields@umich.edu>
22 * Marius Aamodt Eriksen <marius@umich.edu>
28 * Copyright 1990,1991 by the Massachusetts Institute of Technology.
29 * All Rights Reserved.
31 * Export of this software from the United States of America may
32 * require a specific license from the United States Government.
33 * It is the responsibility of any person or organization contemplating
34 * export to obtain such a license before exporting.
36 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
37 * distribute this software and its documentation for any purpose and
38 * without fee is hereby granted, provided that the above copyright
39 * notice appear in all copies and that both that copyright notice and
40 * this permission notice appear in supporting documentation, and that
41 * the name of M.I.T. not be used in advertising or publicity pertaining
42 * to distribution of the software without specific, written prior
43 * permission. Furthermore if you modify this software you must label
44 * your software as modified software and not distribute it in such a
45 * fashion that it might be confused with the original M.I.T. software.
46 * M.I.T. makes no representations about the suitability of
47 * this software for any purpose. It is provided "as is" without express
48 * or implied warranty.
52 * Copyright 1994 by OpenVision Technologies, Inc.
54 * Permission to use, copy, modify, distribute, and sell this software
55 * and its documentation for any purpose is hereby granted without fee,
56 * provided that the above copyright notice appears in all copies and
57 * that both that copyright notice and this permission notice appear in
58 * supporting documentation, and that the name of OpenVision not be used
59 * in advertising or publicity pertaining to distribution of the software
60 * without specific, written prior permission. OpenVision makes no
61 * representations about the suitability of this software for any
62 * purpose. It is provided "as is" without express or implied warranty.
64 * OPENVISION DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
65 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
66 * EVENT SHALL OPENVISION BE LIABLE FOR ANY SPECIAL, INDIRECT OR
67 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
68 * USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
69 * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
70 * PERFORMANCE OF THIS SOFTWARE.
76 #include <sys/types.h>
89 #include <gssapi/gssapi.h>
90 #if defined(HAVE_KRB5) && !defined(GSS_C_NT_HOSTBASED_SERVICE)
91 #include <gssapi/gssapi_generic.h>
92 #define GSS_C_NT_HOSTBASED_SERVICE gss_nt_service_name
102 #include "lsupport.h"
103 #include "lgss_utils.h"
104 #include "lgss_krb5_utils.h"
106 const char *lgss_svc_str[LGSS_SVC_MAX] = {
107 [LGSS_SVC_MGS] = LGSS_SVC_MGS_STR,
108 [LGSS_SVC_MDS] = LGSS_SVC_MDS_STR,
109 [LGSS_SVC_OSS] = LGSS_SVC_OSS_STR,
112 /****************************************
113 * inter-process locking *
114 ****************************************/
116 static struct lgss_mutex_s {
120 } lgss_mutexes[LGSS_MUTEX_MAX] = {
121 [LGSS_MUTEX_KRB5] = { "keyring", 0x4292d473, 0 },
124 static int lgss_mutex_get(struct lgss_mutex_s *mutex)
126 mutex->sem_id = semget(mutex->sem_key, 1, IPC_CREAT | IPC_EXCL | 0700);
127 if (mutex->sem_id != -1) {
128 if (semctl(mutex->sem_id, 0, SETVAL, 1) == -1) {
129 logmsg(LL_ERR, "initialize sem %x: %s\n",
130 mutex->sem_key, strerror(errno));
134 logmsg(LL_DEBUG, "created & initialized sem %x id %d for %s\n",
135 mutex->sem_key, mutex->sem_id, mutex->sem_name);
137 if (errno != EEXIST) {
138 logmsg(LL_ERR, "create sem %x: %s\n",
139 mutex->sem_key, strerror(errno));
143 /* already created by someone else, simply get it.
144 * Note there's still a small window of racing between create
145 * and initialize, a flaw in semaphore semantics */
146 mutex->sem_id = semget(mutex->sem_key, 0, 0700);
147 if (mutex->sem_id == -1) {
148 if (errno == ENOENT) {
149 logmsg(LL_WARN, "sem %x just disappeared "
150 "under us, try again\n", mutex->sem_key);
154 logmsg(LL_ERR, "get sem %x: %s\n", mutex->sem_key,
159 logmsg(LL_TRACE, "got sem %x id %d for %s\n",
160 mutex->sem_key, mutex->sem_id, mutex->sem_name);
166 int lgss_mutex_lock(lgss_mutex_id_t mid)
168 struct lgss_mutex_s *sem = &lgss_mutexes[mid];
169 struct sembuf sembuf;
172 lassert(mid < LGSS_MUTEX_MAX);
174 logmsg(LL_TRACE, "locking mutex %x for %s\n",
175 sem->sem_key, sem->sem_name);
178 rc = lgss_mutex_get(sem);
185 sembuf.sem_flg = SEM_UNDO;
187 if (semop(sem->sem_id, &sembuf, 1) != 0) {
188 logmsg(LL_ERR, "lock mutex %x: %s\n", sem->sem_key,
193 logmsg(LL_DEBUG, "locked mutex %x for %s\n",
194 sem->sem_key, sem->sem_name);
198 int lgss_mutex_unlock(lgss_mutex_id_t mid)
200 struct lgss_mutex_s *sem = &lgss_mutexes[mid];
201 struct sembuf sembuf;
203 lassert(mid < LGSS_MUTEX_MAX);
204 lassert(sem->sem_id >= 0);
206 logmsg(LL_TRACE, "unlocking mutex %x for %s\n",
207 sem->sem_key, sem->sem_name);
211 sembuf.sem_flg = SEM_UNDO;
213 if (semop(sem->sem_id, &sembuf, 1) != 0) {
214 logmsg(LL_ERR, "unlock mutex %x: %s\n", sem->sem_key,
219 logmsg(LL_DEBUG, "unlocked mutex %x for %s\n",
220 sem->sem_key, sem->sem_name);
224 /****************************************
226 ****************************************/
228 /* from kerberos source, gssapi_krb5.c */
229 gss_OID_desc krb5oid =
230 {9, "\052\206\110\206\367\022\001\002\002"};
232 gss_OID_desc spkm3oid =
233 {7, "\053\006\001\005\005\001\003"};
235 /****************************************
237 ****************************************/
239 loglevel_t g_log_level = LL_WARN;
241 static const char *log_prefix[] = {
243 [LL_WARN] = "WARNING",
245 [LL_DEBUG] = "DEBUG",
246 [LL_TRACE] = "TRACE",
249 void lgss_set_loglevel(loglevel_t level)
251 lassert(level < LL_MAX);
255 void __logmsg(loglevel_t level, const char *func, const char *format, ...)
261 offset = snprintf(buf, sizeof(buf), "[%d]:%s:%s(): ",
262 getpid(), log_prefix[level], func);
264 va_start(ap, format);
265 vsnprintf(buf + offset, sizeof(buf) - offset, format, ap);
268 syslog(LOG_INFO, "%s", buf);
271 void __logmsg_gss(loglevel_t level, const char *func, const gss_OID mech,
272 uint32_t major, uint32_t minor, const char *format, ...)
275 u_int32_t maj_stat1, min_stat1;
276 u_int32_t maj_stat2, min_stat2;
277 gss_buffer_desc maj_gss_buf = GSS_C_EMPTY_BUFFER;
278 gss_buffer_desc min_gss_buf = GSS_C_EMPTY_BUFFER;
280 char maj_buf[30], min_buf[30];
281 char *maj_msg, *min_msg;
283 uint32_t msg_ctx = 0;
285 /* Get major status message */
286 maj_stat1 = gss_display_status(&min_stat1, major, GSS_C_GSS_CODE,
287 mech, &msg_ctx, &maj_gss_buf);
288 if (maj_stat1 != GSS_S_COMPLETE) {
289 snprintf(maj_buf, sizeof(maj_buf), "(0x%08x)", major);
290 maj_msg = &maj_buf[0];
292 maj_msg = maj_gss_buf.value;
295 /* Get minor status message */
296 maj_stat2 = gss_display_status(&min_stat2, minor, GSS_C_MECH_CODE,
297 mech, &msg_ctx, &min_gss_buf);
298 if (maj_stat2 != GSS_S_COMPLETE) {
299 snprintf(min_buf, sizeof(min_buf), "(0x%08x)", minor);
300 min_msg = &min_buf[0];
302 min_msg = min_gss_buf.value;
305 /* arrange & log message */
306 offset = snprintf(buf, sizeof(buf), "[%d]:%s:%s(): ",
307 getpid(), log_prefix[level], func);
309 va_start(ap, format);
310 offset += vsnprintf(buf + offset, sizeof(buf) - offset, format, ap);
313 snprintf(buf + offset, sizeof(buf) - offset, ": GSSAPI: %s - %s\n",
316 syslog(LOG_INFO, "%s", buf);
318 /* release buffers */
319 if (maj_gss_buf.length != 0)
320 gss_release_buffer(&min_stat1, &maj_gss_buf);
321 if (min_gss_buf.length != 0)
322 gss_release_buffer(&min_stat2, &min_gss_buf);
325 /****************************************
326 * client credentials *
327 ****************************************/
329 struct lgss_mech_type *lgss_name2mech(const char *mech_name)
331 if (strcmp(mech_name, "krb5") == 0)
332 return &lgss_mech_krb5;
336 int lgss_mech_initialize(struct lgss_mech_type *mech)
338 logmsg(LL_TRACE, "initialize mech %s\n", mech->lmt_name);
340 return mech->lmt_init();
344 void lgss_mech_finalize(struct lgss_mech_type *mech)
346 logmsg(LL_TRACE, "finalize mech %s\n", mech->lmt_name);
351 struct lgss_cred * lgss_create_cred(struct lgss_mech_type *mech)
353 struct lgss_cred *cred;
355 cred = malloc(sizeof(*cred));
357 memset(cred, 0, sizeof(*cred));
358 cred->lc_mech = mech;
361 logmsg(LL_TRACE, "create a %s cred at %p\n", mech->lmt_name, cred);
365 void lgss_destroy_cred(struct lgss_cred *cred)
367 lassert(cred->lc_mech);
368 lassert(cred->lc_mech_cred == NULL);
370 logmsg(LL_TRACE, "destroying a %s cred at %p\n",
371 cred->lc_mech->lmt_name, cred);
375 int lgss_prepare_cred(struct lgss_cred *cred)
377 struct lgss_mech_type *mech = cred->lc_mech;
381 logmsg(LL_TRACE, "preparing %s cred %p\n", mech->lmt_name, cred);
383 if (mech->lmt_prepare_cred)
384 return mech->lmt_prepare_cred(cred);
388 void lgss_release_cred(struct lgss_cred *cred)
390 struct lgss_mech_type *mech = cred->lc_mech;
394 logmsg(LL_TRACE, "releasing %s cred %p\n", mech->lmt_name, cred);
396 if (cred->lc_mech_cred) {
397 lassert(cred->lc_mech != NULL);
398 lassert(cred->lc_mech->lmt_release_cred);
400 cred->lc_mech->lmt_release_cred(cred);
404 int lgss_using_cred(struct lgss_cred *cred)
406 struct lgss_mech_type *mech = cred->lc_mech;
410 logmsg(LL_TRACE, "using %s cred %p\n", mech->lmt_name, cred);
412 if (mech->lmt_using_cred)
413 return mech->lmt_using_cred(cred);
417 /****************************************
419 ****************************************/
421 int lgss_get_service_str(char **string, uint32_t lsvc, uint64_t tgt_nid)
423 const int max_namelen = 512;
424 char namebuf[max_namelen];
427 lassert(*string == NULL);
429 if (lsvc >= LGSS_SVC_MAX) {
430 logmsg(LL_ERR, "invalid lgss service %d\n", lsvc);
434 if (lnet_nid2hostname(tgt_nid, namebuf, max_namelen)) {
435 logmsg(LL_ERR,"can't resolve hostname from nid %llx\n",tgt_nid);
439 alloc_size = 32 + strlen(namebuf);
441 *string = malloc(alloc_size);
442 if (*string == NULL) {
443 logmsg(LL_ERR, "can't malloc %d bytes\n", alloc_size);
447 snprintf(*string, alloc_size, "%s@%s",
448 lgss_svc_str[lsvc], namebuf);
450 logmsg(LL_DEBUG, "constructed service string: %s\n", *string);