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source: vbox/trunk/src/libs/openssl-1.1.1l/apps/srp.c@ 91772

Last change on this file since 91772 was 91772, checked in by vboxsync, 3 years ago

openssl-1.1.1l: Applied and adjusted our OpenSSL changes to 1.1.1l. bugref:10126
File size: 20.1 KB
Line 
1/*
2 * Copyright 2004-2020 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright (c) 2004, EdelKey Project. All Rights Reserved.
4 *
5 * Licensed under the OpenSSL license (the "License"). You may not use
6 * this file except in compliance with the License. You can obtain a copy
7 * in the file LICENSE in the source distribution or at
8 * https://www.openssl.org/source/license.html
9 *
10 * Originally written by Christophe Renou and Peter Sylvester,
11 * for the EdelKey project.
12 */
13
14#include <openssl/opensslconf.h>
15#include <stdio.h>
16#include <stdlib.h>
17#include <string.h>
18#include <openssl/conf.h>
19#include <openssl/bio.h>
20#include <openssl/err.h>
21#include <openssl/txt_db.h>
22#include <openssl/buffer.h>
23#include <openssl/srp.h>
24#include "apps.h"
25#include "progs.h"
26
27#define BASE_SECTION "srp"
28#define CONFIG_FILE "openssl.cnf"
29
30
31#define ENV_DATABASE "srpvfile"
32#define ENV_DEFAULT_SRP "default_srp"
33
34static int get_index(CA_DB *db, char *id, char type)
35{
36 char **pp;
37 int i;
38 if (id == NULL)
39 return -1;
40 if (type == DB_SRP_INDEX) {
41 for (i = 0; i < sk_OPENSSL_PSTRING_num(db->db->data); i++) {
42 pp = sk_OPENSSL_PSTRING_value(db->db->data, i);
43 if (pp[DB_srptype][0] == DB_SRP_INDEX
44 && strcmp(id, pp[DB_srpid]) == 0)
45 return i;
46 }
47 } else {
48 for (i = 0; i < sk_OPENSSL_PSTRING_num(db->db->data); i++) {
49 pp = sk_OPENSSL_PSTRING_value(db->db->data, i);
50
51 if (pp[DB_srptype][0] != DB_SRP_INDEX
52 && strcmp(id, pp[DB_srpid]) == 0)
53 return i;
54 }
55 }
56
57 return -1;
58}
59
60static void print_entry(CA_DB *db, int indx, int verbose, char *s)
61{
62 if (indx >= 0 && verbose) {
63 int j;
64 char **pp = sk_OPENSSL_PSTRING_value(db->db->data, indx);
65 BIO_printf(bio_err, "%s \"%s\"\n", s, pp[DB_srpid]);
66 for (j = 0; j < DB_NUMBER; j++) {
67 BIO_printf(bio_err, " %d = \"%s\"\n", j, pp[j]);
68 }
69 }
70}
71
72static void print_index(CA_DB *db, int indexindex, int verbose)
73{
74 print_entry(db, indexindex, verbose, "g N entry");
75}
76
77static void print_user(CA_DB *db, int userindex, int verbose)
78{
79 if (verbose > 0) {
80 char **pp = sk_OPENSSL_PSTRING_value(db->db->data, userindex);
81
82 if (pp[DB_srptype][0] != 'I') {
83 print_entry(db, userindex, verbose, "User entry");
84 print_entry(db, get_index(db, pp[DB_srpgN], 'I'), verbose,
85 "g N entry");
86 }
87
88 }
89}
90
91static int update_index(CA_DB *db, char **row)
92{
93 char **irow;
94 int i;
95
96 irow = app_malloc(sizeof(*irow) * (DB_NUMBER + 1), "row pointers");
97 for (i = 0; i < DB_NUMBER; i++)
98 irow[i] = row[i];
99 irow[DB_NUMBER] = NULL;
100
101 if (!TXT_DB_insert(db->db, irow)) {
102 BIO_printf(bio_err, "failed to update srpvfile\n");
103 BIO_printf(bio_err, "TXT_DB error number %ld\n", db->db->error);
104 OPENSSL_free(irow);
105 return 0;
106 }
107 return 1;
108}
109
110static char *lookup_conf(const CONF *conf, const char *section, const char *tag)
111{
112 char *entry = NCONF_get_string(conf, section, tag);
113 if (entry == NULL)
114 BIO_printf(bio_err, "variable lookup failed for %s::%s\n", section, tag);
115 return entry;
116}
117
118static char *srp_verify_user(const char *user, const char *srp_verifier,
119 char *srp_usersalt, const char *g, const char *N,
120 const char *passin, int verbose)
121{
122 char password[1025];
123 PW_CB_DATA cb_tmp;
124 char *verifier = NULL;
125 char *gNid = NULL;
126 int len;
127
128 cb_tmp.prompt_info = user;
129 cb_tmp.password = passin;
130
131 len = password_callback(password, sizeof(password)-1, 0, &cb_tmp);
132 if (len > 0) {
133 password[len] = 0;
134 if (verbose)
135 BIO_printf(bio_err,
136 "Validating\n user=\"%s\"\n srp_verifier=\"%s\"\n srp_usersalt=\"%s\"\n g=\"%s\"\n N=\"%s\"\n",
137 user, srp_verifier, srp_usersalt, g, N);
138 if (verbose > 1)
139 BIO_printf(bio_err, "Pass %s\n", password);
140
141 OPENSSL_assert(srp_usersalt != NULL);
142 if ((gNid = SRP_create_verifier(user, password, &srp_usersalt,
143 &verifier, N, g)) == NULL) {
144 BIO_printf(bio_err, "Internal error validating SRP verifier\n");
145 } else {
146 if (strcmp(verifier, srp_verifier))
147 gNid = NULL;
148 OPENSSL_free(verifier);
149 }
150 OPENSSL_cleanse(password, len);
151 }
152 return gNid;
153}
154
155static char *srp_create_user(char *user, char **srp_verifier,
156 char **srp_usersalt, char *g, char *N,
157 char *passout, int verbose)
158{
159 char password[1025];
160 PW_CB_DATA cb_tmp;
161 char *gNid = NULL;
162 char *salt = NULL;
163 int len;
164 cb_tmp.prompt_info = user;
165 cb_tmp.password = passout;
166
167 len = password_callback(password, sizeof(password)-1, 1, &cb_tmp);
168 if (len > 0) {
169 password[len] = 0;
170 if (verbose)
171 BIO_printf(bio_err, "Creating\n user=\"%s\"\n g=\"%s\"\n N=\"%s\"\n",
172 user, g, N);
173 if ((gNid = SRP_create_verifier(user, password, &salt,
174 srp_verifier, N, g)) == NULL) {
175 BIO_printf(bio_err, "Internal error creating SRP verifier\n");
176 } else {
177 *srp_usersalt = salt;
178 }
179 OPENSSL_cleanse(password, len);
180 if (verbose > 1)
181 BIO_printf(bio_err, "gNid=%s salt =\"%s\"\n verifier =\"%s\"\n",
182 gNid, salt, *srp_verifier);
183
184 }
185 return gNid;
186}
187
188typedef enum OPTION_choice {
189 OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
190 OPT_VERBOSE, OPT_CONFIG, OPT_NAME, OPT_SRPVFILE, OPT_ADD,
191 OPT_DELETE, OPT_MODIFY, OPT_LIST, OPT_GN, OPT_USERINFO,
192 OPT_PASSIN, OPT_PASSOUT, OPT_ENGINE, OPT_R_ENUM
193} OPTION_CHOICE;
194
195const OPTIONS srp_options[] = {
196 {"help", OPT_HELP, '-', "Display this summary"},
197 {"verbose", OPT_VERBOSE, '-', "Talk a lot while doing things"},
198 {"config", OPT_CONFIG, '<', "A config file"},
199 {"name", OPT_NAME, 's', "The particular srp definition to use"},
200 {"srpvfile", OPT_SRPVFILE, '<', "The srp verifier file name"},
201 {"add", OPT_ADD, '-', "Add a user and srp verifier"},
202 {"modify", OPT_MODIFY, '-',
203 "Modify the srp verifier of an existing user"},
204 {"delete", OPT_DELETE, '-', "Delete user from verifier file"},
205 {"list", OPT_LIST, '-', "List users"},
206 {"gn", OPT_GN, 's', "Set g and N values to be used for new verifier"},
207 {"userinfo", OPT_USERINFO, 's', "Additional info to be set for user"},
208 {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
209 {"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
210 OPT_R_OPTIONS,
211#ifndef OPENSSL_NO_ENGINE
212 {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
213#endif
214 {NULL}
215};
216
217int srp_main(int argc, char **argv)
218{
219 ENGINE *e = NULL;
220 CA_DB *db = NULL;
221 CONF *conf = NULL;
222 int gNindex = -1, maxgN = -1, ret = 1, errors = 0, verbose = 0, i;
223 int doupdatedb = 0, mode = OPT_ERR;
224 char *user = NULL, *passinarg = NULL, *passoutarg = NULL;
225 char *passin = NULL, *passout = NULL, *gN = NULL, *userinfo = NULL;
226 char *section = NULL;
227 char **gNrow = NULL, *configfile = NULL;
228 char *srpvfile = NULL, **pp, *prog;
229 OPTION_CHOICE o;
230
231 prog = opt_init(argc, argv, srp_options);
232 while ((o = opt_next()) != OPT_EOF) {
233 switch (o) {
234 case OPT_EOF:
235 case OPT_ERR:
236 opthelp:
237 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
238 goto end;
239 case OPT_HELP:
240 opt_help(srp_options);
241 ret = 0;
242 goto end;
243 case OPT_VERBOSE:
244 verbose++;
245 break;
246 case OPT_CONFIG:
247 configfile = opt_arg();
248 break;
249 case OPT_NAME:
250 section = opt_arg();
251 break;
252 case OPT_SRPVFILE:
253 srpvfile = opt_arg();
254 break;
255 case OPT_ADD:
256 case OPT_DELETE:
257 case OPT_MODIFY:
258 case OPT_LIST:
259 if (mode != OPT_ERR) {
260 BIO_printf(bio_err,
261 "%s: Only one of -add/-delete/-modify/-list\n",
262 prog);
263 goto opthelp;
264 }
265 mode = o;
266 break;
267 case OPT_GN:
268 gN = opt_arg();
269 break;
270 case OPT_USERINFO:
271 userinfo = opt_arg();
272 break;
273 case OPT_PASSIN:
274 passinarg = opt_arg();
275 break;
276 case OPT_PASSOUT:
277 passoutarg = opt_arg();
278 break;
279 case OPT_ENGINE:
280 e = setup_engine(opt_arg(), 0);
281 break;
282 case OPT_R_CASES:
283 if (!opt_rand(o))
284 goto end;
285 break;
286 }
287 }
288 argc = opt_num_rest();
289 argv = opt_rest();
290
291 if (srpvfile != NULL && configfile != NULL) {
292 BIO_printf(bio_err,
293 "-srpvfile and -configfile cannot be specified together.\n");
294 goto end;
295 }
296 if (mode == OPT_ERR) {
297 BIO_printf(bio_err,
298 "Exactly one of the options -add, -delete, -modify -list must be specified.\n");
299 goto opthelp;
300 }
301 if (mode == OPT_DELETE || mode == OPT_MODIFY || mode == OPT_ADD) {
302 if (argc == 0) {
303 BIO_printf(bio_err, "Need at least one user.\n");
304 goto opthelp;
305 }
306 user = *argv++;
307 }
308 if ((passinarg != NULL || passoutarg != NULL) && argc != 1) {
309 BIO_printf(bio_err,
310 "-passin, -passout arguments only valid with one user.\n");
311 goto opthelp;
312 }
313
314 if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
315 BIO_printf(bio_err, "Error getting passwords\n");
316 goto end;
317 }
318
319 if (srpvfile == NULL) {
320 if (configfile == NULL)
321 configfile = default_config_file;
322
323 if (verbose)
324 BIO_printf(bio_err, "Using configuration from %s\n",
325 configfile);
326 conf = app_load_config(configfile);
327 if (conf == NULL)
328 goto end;
329 if (configfile != default_config_file && !app_load_modules(conf))
330 goto end;
331
332 /* Lets get the config section we are using */
333 if (section == NULL) {
334 if (verbose)
335 BIO_printf(bio_err,
336 "trying to read " ENV_DEFAULT_SRP
337 " in " BASE_SECTION "\n");
338
339 section = lookup_conf(conf, BASE_SECTION, ENV_DEFAULT_SRP);
340 if (section == NULL)
341 goto end;
342 }
343
344 app_RAND_load_conf(conf, BASE_SECTION);
345
346 if (verbose)
347 BIO_printf(bio_err,
348 "trying to read " ENV_DATABASE " in section \"%s\"\n",
349 section);
350
351 srpvfile = lookup_conf(conf, section, ENV_DATABASE);
352 if (srpvfile == NULL)
353 goto end;
354 }
355
356 if (verbose)
357 BIO_printf(bio_err, "Trying to read SRP verifier file \"%s\"\n",
358 srpvfile);
359
360 db = load_index(srpvfile, NULL);
361 if (db == NULL)
362 goto end;
363
364 /* Lets check some fields */
365 for (i = 0; i < sk_OPENSSL_PSTRING_num(db->db->data); i++) {
366 pp = sk_OPENSSL_PSTRING_value(db->db->data, i);
367
368 if (pp[DB_srptype][0] == DB_SRP_INDEX) {
369 maxgN = i;
370 if ((gNindex < 0) && (gN != NULL) && strcmp(gN, pp[DB_srpid]) == 0)
371 gNindex = i;
372
373 print_index(db, i, verbose > 1);
374 }
375 }
376
377 if (verbose)
378 BIO_printf(bio_err, "Database initialised\n");
379
380 if (gNindex >= 0) {
381 gNrow = sk_OPENSSL_PSTRING_value(db->db->data, gNindex);
382 print_entry(db, gNindex, verbose > 1, "Default g and N");
383 } else if (maxgN > 0 && !SRP_get_default_gN(gN)) {
384 BIO_printf(bio_err, "No g and N value for index \"%s\"\n", gN);
385 goto end;
386 } else {
387 if (verbose)
388 BIO_printf(bio_err, "Database has no g N information.\n");
389 gNrow = NULL;
390 }
391
392 if (verbose > 1)
393 BIO_printf(bio_err, "Starting user processing\n");
394
395 while (mode == OPT_LIST || user != NULL) {
396 int userindex = -1;
397
398 if (user != NULL && verbose > 1)
399 BIO_printf(bio_err, "Processing user \"%s\"\n", user);
400 if ((userindex = get_index(db, user, 'U')) >= 0)
401 print_user(db, userindex, (verbose > 0) || mode == OPT_LIST);
402
403 if (mode == OPT_LIST) {
404 if (user == NULL) {
405 BIO_printf(bio_err, "List all users\n");
406
407 for (i = 0; i < sk_OPENSSL_PSTRING_num(db->db->data); i++)
408 print_user(db, i, 1);
409 } else if (userindex < 0) {
410 BIO_printf(bio_err,
411 "user \"%s\" does not exist, ignored. t\n", user);
412 errors++;
413 }
414 } else if (mode == OPT_ADD) {
415 if (userindex >= 0) {
416 /* reactivation of a new user */
417 char **row =
418 sk_OPENSSL_PSTRING_value(db->db->data, userindex);
419 BIO_printf(bio_err, "user \"%s\" reactivated.\n", user);
420 row[DB_srptype][0] = 'V';
421
422 doupdatedb = 1;
423 } else {
424 char *row[DB_NUMBER];
425 char *gNid;
426 row[DB_srpverifier] = NULL;
427 row[DB_srpsalt] = NULL;
428 row[DB_srpinfo] = NULL;
429 if (!
430 (gNid =
431 srp_create_user(user, &(row[DB_srpverifier]),
432 &(row[DB_srpsalt]),
433 gNrow ? gNrow[DB_srpsalt] : gN,
434 gNrow ? gNrow[DB_srpverifier] : NULL,
435 passout, verbose))) {
436 BIO_printf(bio_err,
437 "Cannot create srp verifier for user \"%s\", operation abandoned .\n",
438 user);
439 errors++;
440 goto end;
441 }
442 row[DB_srpid] = OPENSSL_strdup(user);
443 row[DB_srptype] = OPENSSL_strdup("v");
444 row[DB_srpgN] = OPENSSL_strdup(gNid);
445
446 if ((row[DB_srpid] == NULL)
447 || (row[DB_srpgN] == NULL)
448 || (row[DB_srptype] == NULL)
449 || (row[DB_srpverifier] == NULL)
450 || (row[DB_srpsalt] == NULL)
451 || (userinfo
452 && ((row[DB_srpinfo] = OPENSSL_strdup(userinfo)) == NULL))
453 || !update_index(db, row)) {
454 OPENSSL_free(row[DB_srpid]);
455 OPENSSL_free(row[DB_srpgN]);
456 OPENSSL_free(row[DB_srpinfo]);
457 OPENSSL_free(row[DB_srptype]);
458 OPENSSL_free(row[DB_srpverifier]);
459 OPENSSL_free(row[DB_srpsalt]);
460 goto end;
461 }
462 doupdatedb = 1;
463 }
464 } else if (mode == OPT_MODIFY) {
465 if (userindex < 0) {
466 BIO_printf(bio_err,
467 "user \"%s\" does not exist, operation ignored.\n",
468 user);
469 errors++;
470 } else {
471
472 char **row =
473 sk_OPENSSL_PSTRING_value(db->db->data, userindex);
474 char type = row[DB_srptype][0];
475 if (type == 'v') {
476 BIO_printf(bio_err,
477 "user \"%s\" already updated, operation ignored.\n",
478 user);
479 errors++;
480 } else {
481 char *gNid;
482
483 if (row[DB_srptype][0] == 'V') {
484 int user_gN;
485 char **irow = NULL;
486 if (verbose)
487 BIO_printf(bio_err,
488 "Verifying password for user \"%s\"\n",
489 user);
490 if ((user_gN =
491 get_index(db, row[DB_srpgN], DB_SRP_INDEX)) >= 0)
492 irow =
493 sk_OPENSSL_PSTRING_value(db->db->data,
494 userindex);
495
496 if (!srp_verify_user
497 (user, row[DB_srpverifier], row[DB_srpsalt],
498 irow ? irow[DB_srpsalt] : row[DB_srpgN],
499 irow ? irow[DB_srpverifier] : NULL, passin,
500 verbose)) {
501 BIO_printf(bio_err,
502 "Invalid password for user \"%s\", operation abandoned.\n",
503 user);
504 errors++;
505 goto end;
506 }
507 }
508 if (verbose)
509 BIO_printf(bio_err, "Password for user \"%s\" ok.\n",
510 user);
511
512 if (!
513 (gNid =
514 srp_create_user(user, &(row[DB_srpverifier]),
515 &(row[DB_srpsalt]),
516 gNrow ? gNrow[DB_srpsalt] : NULL,
517 gNrow ? gNrow[DB_srpverifier] : NULL,
518 passout, verbose))) {
519 BIO_printf(bio_err,
520 "Cannot create srp verifier for user \"%s\", operation abandoned.\n",
521 user);
522 errors++;
523 goto end;
524 }
525
526 row[DB_srptype][0] = 'v';
527 row[DB_srpgN] = OPENSSL_strdup(gNid);
528
529 if (row[DB_srpid] == NULL
530 || row[DB_srpgN] == NULL
531 || row[DB_srptype] == NULL
532 || row[DB_srpverifier] == NULL
533 || row[DB_srpsalt] == NULL
534 || (userinfo
535 && ((row[DB_srpinfo] = OPENSSL_strdup(userinfo))
536 == NULL)))
537 goto end;
538
539 doupdatedb = 1;
540 }
541 }
542 } else if (mode == OPT_DELETE) {
543 if (userindex < 0) {
544 BIO_printf(bio_err,
545 "user \"%s\" does not exist, operation ignored. t\n",
546 user);
547 errors++;
548 } else {
549 char **xpp = sk_OPENSSL_PSTRING_value(db->db->data, userindex);
550
551 BIO_printf(bio_err, "user \"%s\" revoked. t\n", user);
552 xpp[DB_srptype][0] = 'R';
553 doupdatedb = 1;
554 }
555 }
556 user = *argv++;
557 if (user == NULL) {
558 /* no more processing in any mode if no users left */
559 break;
560 }
561 }
562
563 if (verbose)
564 BIO_printf(bio_err, "User procession done.\n");
565
566 if (doupdatedb) {
567 /* Lets check some fields */
568 for (i = 0; i < sk_OPENSSL_PSTRING_num(db->db->data); i++) {
569 pp = sk_OPENSSL_PSTRING_value(db->db->data, i);
570
571 if (pp[DB_srptype][0] == 'v') {
572 pp[DB_srptype][0] = 'V';
573 print_user(db, i, verbose);
574 }
575 }
576
577 if (verbose)
578 BIO_printf(bio_err, "Trying to update srpvfile.\n");
579 if (!save_index(srpvfile, "new", db))
580 goto end;
581
582 if (verbose)
583 BIO_printf(bio_err, "Temporary srpvfile created.\n");
584 if (!rotate_index(srpvfile, "new", "old"))
585 goto end;
586
587 if (verbose)
588 BIO_printf(bio_err, "srpvfile updated.\n");
589 }
590
591 ret = (errors != 0);
592 end:
593 if (errors != 0)
594 if (verbose)
595 BIO_printf(bio_err, "User errors %d.\n", errors);
596
597 if (verbose)
598 BIO_printf(bio_err, "SRP terminating with code %d.\n", ret);
599
600 OPENSSL_free(passin);
601 OPENSSL_free(passout);
602 if (ret)
603 ERR_print_errors(bio_err);
604 NCONF_free(conf);
605 free_index(db);
606 release_engine(e);
607 return ret;
608}
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