]> git.ipfire.org Git - thirdparty/openssl.git/blob - apps/srp.c
Rename some BUF_xxx to OPENSSL_xxx
[thirdparty/openssl.git] / apps / srp.c
1 /*
2 * Written by Peter Sylvester (peter.sylvester@edelweb.fr) for the EdelKey
3 * project and contributed to the OpenSSL project 2004.
4 */
5 /* ====================================================================
6 * Copyright (c) 2004 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58 #include <openssl/opensslconf.h>
59
60 #ifndef OPENSSL_NO_SRP
61 #include <stdio.h>
62 #include <stdlib.h>
63 #include <string.h>
64 #include <openssl/conf.h>
65 #include <openssl/bio.h>
66 #include <openssl/err.h>
67 #include <openssl/txt_db.h>
68 #include <openssl/buffer.h>
69 #include <openssl/srp.h>
70 #include "apps.h"
71
72 # define BASE_SECTION "srp"
73 # define CONFIG_FILE "openssl.cnf"
74
75 # define ENV_RANDFILE "RANDFILE"
76
77 # define ENV_DATABASE "srpvfile"
78 # define ENV_DEFAULT_SRP "default_srp"
79
80 static int get_index(CA_DB *db, char *id, char type)
81 {
82 char **pp;
83 int i;
84 if (id == NULL)
85 return -1;
86 if (type == DB_SRP_INDEX)
87 for (i = 0; i < sk_OPENSSL_PSTRING_num(db->db->data); i++) {
88 pp = sk_OPENSSL_PSTRING_value(db->db->data, i);
89 if (pp[DB_srptype][0] == DB_SRP_INDEX
90 && strcmp(id, pp[DB_srpid]) == 0)
91 return i;
92 } else
93 for (i = 0; i < sk_OPENSSL_PSTRING_num(db->db->data); i++) {
94 pp = sk_OPENSSL_PSTRING_value(db->db->data, i);
95
96 if (pp[DB_srptype][0] != DB_SRP_INDEX
97 && strcmp(id, pp[DB_srpid]) == 0)
98 return i;
99 }
100
101 return -1;
102 }
103
104 static void print_entry(CA_DB *db, int indx, int verbose, char *s)
105 {
106 if (indx >= 0 && verbose) {
107 int j;
108 char **pp = sk_OPENSSL_PSTRING_value(db->db->data, indx);
109 BIO_printf(bio_err, "%s \"%s\"\n", s, pp[DB_srpid]);
110 for (j = 0; j < DB_NUMBER; j++) {
111 BIO_printf(bio_err, " %d = \"%s\"\n", j, pp[j]);
112 }
113 }
114 }
115
116 static void print_index(CA_DB *db, int indexindex, int verbose)
117 {
118 print_entry(db, indexindex, verbose, "g N entry");
119 }
120
121 static void print_user(CA_DB *db, int userindex, int verbose)
122 {
123 if (verbose > 0) {
124 char **pp = sk_OPENSSL_PSTRING_value(db->db->data, userindex);
125
126 if (pp[DB_srptype][0] != 'I') {
127 print_entry(db, userindex, verbose, "User entry");
128 print_entry(db, get_index(db, pp[DB_srpgN], 'I'), verbose,
129 "g N entry");
130 }
131
132 }
133 }
134
135 static int update_index(CA_DB *db, char **row)
136 {
137 char **irow;
138 int i;
139
140 irow = app_malloc(sizeof(*irow) * (DB_NUMBER + 1), "row pointers");
141 for (i = 0; i < DB_NUMBER; i++) {
142 irow[i] = row[i];
143 row[i] = NULL;
144 }
145 irow[DB_NUMBER] = NULL;
146
147 if (!TXT_DB_insert(db->db, irow)) {
148 BIO_printf(bio_err, "failed to update srpvfile\n");
149 BIO_printf(bio_err, "TXT_DB error number %ld\n", db->db->error);
150 OPENSSL_free(irow);
151 return 0;
152 }
153 return 1;
154 }
155
156 static void lookup_fail(const char *name, const char *tag)
157 {
158 BIO_printf(bio_err, "variable lookup failed for %s::%s\n", name, tag);
159 }
160
161 static char *srp_verify_user(const char *user, const char *srp_verifier,
162 char *srp_usersalt, const char *g, const char *N,
163 const char *passin, int verbose)
164 {
165 char password[1024];
166 PW_CB_DATA cb_tmp;
167 char *verifier = NULL;
168 char *gNid = NULL;
169
170 cb_tmp.prompt_info = user;
171 cb_tmp.password = passin;
172
173 if (password_callback(password, 1024, 0, &cb_tmp) > 0) {
174 if (verbose)
175 BIO_printf(bio_err,
176 "Validating\n user=\"%s\"\n srp_verifier=\"%s\"\n srp_usersalt=\"%s\"\n g=\"%s\"\n N=\"%s\"\n",
177 user, srp_verifier, srp_usersalt, g, N);
178 BIO_printf(bio_err, "Pass %s\n", password);
179
180 OPENSSL_assert(srp_usersalt != NULL);
181 if (!
182 (gNid =
183 SRP_create_verifier(user, password, &srp_usersalt, &verifier, N,
184 g))) {
185 BIO_printf(bio_err, "Internal error validating SRP verifier\n");
186 } else {
187 if (strcmp(verifier, srp_verifier))
188 gNid = NULL;
189 OPENSSL_free(verifier);
190 }
191 }
192 return gNid;
193 }
194
195 static char *srp_create_user(char *user, char **srp_verifier,
196 char **srp_usersalt, char *g, char *N,
197 char *passout, int verbose)
198 {
199 char password[1024];
200 PW_CB_DATA cb_tmp;
201 char *gNid = NULL;
202 char *salt = NULL;
203 cb_tmp.prompt_info = user;
204 cb_tmp.password = passout;
205
206 if (password_callback(password, 1024, 1, &cb_tmp) > 0) {
207 if (verbose)
208 BIO_printf(bio_err, "Creating\n user=\"%s\"\n g=\"%s\"\n N=\"%s\"\n",
209 user, g, N);
210 if (!
211 (gNid =
212 SRP_create_verifier(user, password, &salt, srp_verifier, N,
213 g))) {
214 BIO_printf(bio_err, "Internal error creating SRP verifier\n");
215 } else
216 *srp_usersalt = salt;
217 if (verbose > 1)
218 BIO_printf(bio_err, "gNid=%s salt =\"%s\"\n verifier =\"%s\"\n", gNid,
219 salt, *srp_verifier);
220
221 }
222 return gNid;
223 }
224
225 typedef enum OPTION_choice {
226 OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
227 OPT_VERBOSE, OPT_CONFIG, OPT_NAME, OPT_SRPVFILE, OPT_ADD,
228 OPT_DELETE, OPT_MODIFY, OPT_LIST, OPT_GN, OPT_USERINFO,
229 OPT_PASSIN, OPT_PASSOUT, OPT_ENGINE
230 } OPTION_CHOICE;
231
232 OPTIONS srp_options[] = {
233 {"help", OPT_HELP, '-', "Display this summary"},
234 {"verbose", OPT_VERBOSE, '-', "Talk a lot while doing things"},
235 {"config", OPT_CONFIG, '<', "A config file"},
236 {"name", OPT_NAME, 's', "The particular srp definition to use"},
237 {"srpvfile", OPT_SRPVFILE, '<', "The srp verifier file name"},
238 {"add", OPT_ADD, '-', "Add a user and srp verifier"},
239 {"modify", OPT_MODIFY, '-',
240 "Modify the srp verifier of an existing user"},
241 {"delete", OPT_DELETE, '-', "Delete user from verifier file"},
242 {"list", OPT_LIST, '-', "List users"},
243 {"gn", OPT_GN, 's', "Set g and N values to be used for new verifier"},
244 {"userinfo", OPT_USERINFO, 's', "Additional info to be set for user"},
245 {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
246 {"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
247 # ifndef OPENSSL_NO_ENGINE
248 {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
249 # endif
250 {NULL}
251 };
252
253 int srp_main(int argc, char **argv)
254 {
255 CA_DB *db = NULL;
256 DB_ATTR db_attr;
257 CONF *conf = NULL;
258 int gNindex = -1, maxgN = -1, ret = 1, errors = 0, verbose = 0, i;
259 int doupdatedb = 0, mode = OPT_ERR;
260 char *user = NULL, *passinarg = NULL, *passoutarg = NULL;
261 char *passin = NULL, *passout = NULL, *gN = NULL, *userinfo = NULL;
262 char *randfile = NULL, *tofree = NULL, *section = NULL;
263 char **gNrow = NULL, *configfile = NULL;
264 char *srpvfile = NULL, **pp, *prog;
265 OPTION_CHOICE o;
266
267 prog = opt_init(argc, argv, srp_options);
268 while ((o = opt_next()) != OPT_EOF) {
269 switch (o) {
270 case OPT_EOF:
271 case OPT_ERR:
272 opthelp:
273 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
274 goto end;
275 case OPT_HELP:
276 opt_help(srp_options);
277 ret = 0;
278 goto end;
279 case OPT_VERBOSE:
280 verbose++;
281 break;
282 case OPT_CONFIG:
283 configfile = opt_arg();
284 break;
285 case OPT_NAME:
286 section = opt_arg();
287 break;
288 case OPT_SRPVFILE:
289 srpvfile = opt_arg();
290 break;
291 case OPT_ADD:
292 case OPT_DELETE:
293 case OPT_MODIFY:
294 case OPT_LIST:
295 if (mode != OPT_ERR) {
296 BIO_printf(bio_err,
297 "%s: Only one of -add/delete-modify/-list\n",
298 prog);
299 goto opthelp;
300 }
301 mode = o;
302 break;
303 case OPT_GN:
304 gN = opt_arg();
305 break;
306 case OPT_USERINFO:
307 userinfo = opt_arg();
308 break;
309 case OPT_PASSIN:
310 passinarg = opt_arg();
311 break;
312 case OPT_PASSOUT:
313 passoutarg = opt_arg();
314 break;
315 case OPT_ENGINE:
316 (void)setup_engine(opt_arg(), 0);
317 break;
318 }
319 }
320 argc = opt_num_rest();
321 argv = opt_rest();
322
323 if (srpvfile && configfile) {
324 BIO_printf(bio_err,
325 "-srpvfile and -configfile cannot be specified together.\n");
326 goto end;
327 }
328 if (mode == OPT_ERR) {
329 BIO_printf(bio_err,
330 "Exactly one of the options -add, -delete, -modify -list must be specified.\n");
331 goto opthelp;
332 }
333 if ((mode == OPT_DELETE || mode == OPT_MODIFY || mode == OPT_ADD)
334 && argc < 1) {
335 BIO_printf(bio_err,
336 "Need at least one user for options -add, -delete, -modify. \n");
337 goto opthelp;
338 }
339 if ((passin || passout) && argc != 1) {
340 BIO_printf(bio_err,
341 "-passin, -passout arguments only valid with one user.\n");
342 goto opthelp;
343 }
344
345 if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
346 BIO_printf(bio_err, "Error getting passwords\n");
347 goto end;
348 }
349
350 if (!srpvfile) {
351 if (!configfile)
352 configfile = default_config_file;
353
354 if (verbose)
355 BIO_printf(bio_err, "Using configuration from %s\n",
356 configfile);
357 conf = app_load_config(configfile);
358 if (conf == NULL)
359 goto end;
360 if (!app_load_modules(conf))
361 goto end;
362
363 /* Lets get the config section we are using */
364 if (section == NULL) {
365 if (verbose)
366 BIO_printf(bio_err,
367 "trying to read " ENV_DEFAULT_SRP
368 " in \" BASE_SECTION \"\n");
369
370 section = NCONF_get_string(conf, BASE_SECTION, ENV_DEFAULT_SRP);
371 if (section == NULL) {
372 lookup_fail(BASE_SECTION, ENV_DEFAULT_SRP);
373 goto end;
374 }
375 }
376
377 if (randfile == NULL && conf)
378 randfile = NCONF_get_string(conf, BASE_SECTION, "RANDFILE");
379
380 if (verbose)
381 BIO_printf(bio_err,
382 "trying to read " ENV_DATABASE " in section \"%s\"\n",
383 section);
384
385 if ((srpvfile = NCONF_get_string(conf, section, ENV_DATABASE))
386 == NULL) {
387 lookup_fail(section, ENV_DATABASE);
388 goto end;
389 }
390
391 }
392 if (randfile == NULL)
393 ERR_clear_error();
394 else
395 app_RAND_load_file(randfile, 0);
396
397 if (verbose)
398 BIO_printf(bio_err, "Trying to read SRP verifier file \"%s\"\n",
399 srpvfile);
400
401 db = load_index(srpvfile, &db_attr);
402 if (db == NULL)
403 goto end;
404
405 /* Lets check some fields */
406 for (i = 0; i < sk_OPENSSL_PSTRING_num(db->db->data); i++) {
407 pp = sk_OPENSSL_PSTRING_value(db->db->data, i);
408
409 if (pp[DB_srptype][0] == DB_SRP_INDEX) {
410 maxgN = i;
411 if ((gNindex < 0) && (gN != NULL) && strcmp(gN, pp[DB_srpid]) == 0)
412 gNindex = i;
413
414 print_index(db, i, verbose > 1);
415 }
416 }
417
418 if (verbose)
419 BIO_printf(bio_err, "Database initialised\n");
420
421 if (gNindex >= 0) {
422 gNrow = sk_OPENSSL_PSTRING_value(db->db->data, gNindex);
423 print_entry(db, gNindex, verbose > 1, "Default g and N");
424 } else if (maxgN > 0 && !SRP_get_default_gN(gN)) {
425 BIO_printf(bio_err, "No g and N value for index \"%s\"\n", gN);
426 goto end;
427 } else {
428 if (verbose)
429 BIO_printf(bio_err, "Database has no g N information.\n");
430 gNrow = NULL;
431 }
432
433 if (verbose > 1)
434 BIO_printf(bio_err, "Starting user processing\n");
435
436 if (argc > 0)
437 user = *(argv++);
438
439 while (mode == OPT_LIST || user) {
440 int userindex = -1;
441 if (user)
442 if (verbose > 1)
443 BIO_printf(bio_err, "Processing user \"%s\"\n", user);
444 if ((userindex = get_index(db, user, 'U')) >= 0) {
445 print_user(db, userindex, (verbose > 0)
446 || mode == OPT_LIST);
447 }
448
449 if (mode == OPT_LIST) {
450 if (user == NULL) {
451 BIO_printf(bio_err, "List all users\n");
452
453 for (i = 0; i < sk_OPENSSL_PSTRING_num(db->db->data); i++) {
454 print_user(db, i, 1);
455 }
456 } else if (userindex < 0) {
457 BIO_printf(bio_err,
458 "user \"%s\" does not exist, ignored. t\n", user);
459 errors++;
460 }
461 } else if (mode == OPT_ADD) {
462 if (userindex >= 0) {
463 /* reactivation of a new user */
464 char **row =
465 sk_OPENSSL_PSTRING_value(db->db->data, userindex);
466 BIO_printf(bio_err, "user \"%s\" reactivated.\n", user);
467 row[DB_srptype][0] = 'V';
468
469 doupdatedb = 1;
470 } else {
471 char *row[DB_NUMBER];
472 char *gNid;
473 row[DB_srpverifier] = NULL;
474 row[DB_srpsalt] = NULL;
475 row[DB_srpinfo] = NULL;
476 if (!
477 (gNid =
478 srp_create_user(user, &(row[DB_srpverifier]),
479 &(row[DB_srpsalt]),
480 gNrow ? gNrow[DB_srpsalt] : gN,
481 gNrow ? gNrow[DB_srpverifier] : NULL,
482 passout, verbose))) {
483 BIO_printf(bio_err,
484 "Cannot create srp verifier for user \"%s\", operation abandoned .\n",
485 user);
486 errors++;
487 goto end;
488 }
489 row[DB_srpid] = OPENSSL_strdup(user);
490 row[DB_srptype] = OPENSSL_strdup("v");
491 row[DB_srpgN] = OPENSSL_strdup(gNid);
492
493 if ((row[DB_srpid] == NULL)
494 || (row[DB_srpgN] == NULL)
495 || (row[DB_srptype] == NULL)
496 || (row[DB_srpverifier] == NULL)
497 || (row[DB_srpsalt] == NULL)
498 || (userinfo
499 && ((row[DB_srpinfo] = OPENSSL_strdup(userinfo)) == NULL))
500 || !update_index(db, row)) {
501 OPENSSL_free(row[DB_srpid]);
502 OPENSSL_free(row[DB_srpgN]);
503 OPENSSL_free(row[DB_srpinfo]);
504 OPENSSL_free(row[DB_srptype]);
505 OPENSSL_free(row[DB_srpverifier]);
506 OPENSSL_free(row[DB_srpsalt]);
507 goto end;
508 }
509 doupdatedb = 1;
510 }
511 } else if (mode == OPT_MODIFY) {
512 if (userindex < 0) {
513 BIO_printf(bio_err,
514 "user \"%s\" does not exist, operation ignored.\n",
515 user);
516 errors++;
517 } else {
518
519 char **row =
520 sk_OPENSSL_PSTRING_value(db->db->data, userindex);
521 char type = row[DB_srptype][0];
522 if (type == 'v') {
523 BIO_printf(bio_err,
524 "user \"%s\" already updated, operation ignored.\n",
525 user);
526 errors++;
527 } else {
528 char *gNid;
529
530 if (row[DB_srptype][0] == 'V') {
531 int user_gN;
532 char **irow = NULL;
533 if (verbose)
534 BIO_printf(bio_err,
535 "Verifying password for user \"%s\"\n",
536 user);
537 if ((user_gN =
538 get_index(db, row[DB_srpgN], DB_SRP_INDEX)) >= 0)
539 irow =
540 sk_OPENSSL_PSTRING_value(db->db->data,
541 userindex);
542
543 if (!srp_verify_user
544 (user, row[DB_srpverifier], row[DB_srpsalt],
545 irow ? irow[DB_srpsalt] : row[DB_srpgN],
546 irow ? irow[DB_srpverifier] : NULL, passin,
547 verbose)) {
548 BIO_printf(bio_err,
549 "Invalid password for user \"%s\", operation abandoned.\n",
550 user);
551 errors++;
552 goto end;
553 }
554 }
555 if (verbose)
556 BIO_printf(bio_err, "Password for user \"%s\" ok.\n",
557 user);
558
559 if (!
560 (gNid =
561 srp_create_user(user, &(row[DB_srpverifier]),
562 &(row[DB_srpsalt]),
563 gNrow ? gNrow[DB_srpsalt] : NULL,
564 gNrow ? gNrow[DB_srpverifier] : NULL,
565 passout, verbose))) {
566 BIO_printf(bio_err,
567 "Cannot create srp verifier for user \"%s\", operation abandoned.\n",
568 user);
569 errors++;
570 goto end;
571 }
572
573 row[DB_srptype][0] = 'v';
574 row[DB_srpgN] = OPENSSL_strdup(gNid);
575
576 if (row[DB_srpid] == NULL
577 || row[DB_srpgN] == NULL
578 || row[DB_srptype] == NULL
579 || row[DB_srpverifier] == NULL
580 || row[DB_srpsalt] == NULL
581 || (userinfo
582 && ((row[DB_srpinfo] = OPENSSL_strdup(userinfo))
583 == NULL)))
584 goto end;
585
586 doupdatedb = 1;
587 }
588 }
589 } else if (mode == OPT_DELETE) {
590 if (userindex < 0) {
591 BIO_printf(bio_err,
592 "user \"%s\" does not exist, operation ignored. t\n",
593 user);
594 errors++;
595 } else {
596 char **xpp = sk_OPENSSL_PSTRING_value(db->db->data, userindex);
597
598 BIO_printf(bio_err, "user \"%s\" revoked. t\n", user);
599 xpp[DB_srptype][0] = 'R';
600 doupdatedb = 1;
601 }
602 }
603 if (--argc > 0)
604 user = *(argv++);
605 else {
606 user = NULL;
607 }
608 }
609
610 if (verbose)
611 BIO_printf(bio_err, "User procession done.\n");
612
613 if (doupdatedb) {
614 /* Lets check some fields */
615 for (i = 0; i < sk_OPENSSL_PSTRING_num(db->db->data); i++) {
616 pp = sk_OPENSSL_PSTRING_value(db->db->data, i);
617
618 if (pp[DB_srptype][0] == 'v') {
619 pp[DB_srptype][0] = 'V';
620 print_user(db, i, verbose);
621 }
622 }
623
624 if (verbose)
625 BIO_printf(bio_err, "Trying to update srpvfile.\n");
626 if (!save_index(srpvfile, "new", db))
627 goto end;
628
629 if (verbose)
630 BIO_printf(bio_err, "Temporary srpvfile created.\n");
631 if (!rotate_index(srpvfile, "new", "old"))
632 goto end;
633
634 if (verbose)
635 BIO_printf(bio_err, "srpvfile updated.\n");
636 }
637
638 ret = (errors != 0);
639 end:
640 if (errors != 0)
641 if (verbose)
642 BIO_printf(bio_err, "User errors %d.\n", errors);
643
644 if (verbose)
645 BIO_printf(bio_err, "SRP terminating with code %d.\n", ret);
646 OPENSSL_free(tofree);
647 if (ret)
648 ERR_print_errors(bio_err);
649 if (randfile)
650 app_RAND_write_file(randfile);
651 NCONF_free(conf);
652 free_index(db);
653 OBJ_cleanup();
654 return (ret);
655 }
656
657 #else
658
659 # if PEDANTIC
660 static void *dummy = &dummy;
661 # endif
662
663 #endif