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1 | /* $Id$ | |
2 | * | |
3 | * Server for user registration with Moira and Kerberos. | |
4 | * | |
5 | * Copyright (C) 1987-1998 by the Massachusetts Institute of Technology | |
6 | * For copying and distribution information, please see the file | |
7 | * <mit-copyright.h>. | |
8 | */ | |
9 | ||
10 | #include <mit-copyright.h> | |
11 | #include <moira.h> | |
12 | #include <mr_private.h> | |
13 | #include <moira_schema.h> | |
14 | #include <moira_site.h> | |
15 | #include "reg_svr.h" | |
16 | ||
17 | #include <sys/types.h> | |
18 | #include <sys/socket.h> | |
19 | #include <sys/stat.h> | |
20 | #include <sys/time.h> | |
21 | #include <sys/utsname.h> | |
22 | ||
23 | #include <netinet/in.h> | |
24 | #include <netdb.h> | |
25 | ||
26 | #include <ctype.h> | |
27 | #include <errno.h> | |
28 | #include <signal.h> | |
29 | #include <stdarg.h> | |
30 | #include <stdio.h> | |
31 | #include <stdlib.h> | |
32 | #include <string.h> | |
33 | #include <unistd.h> | |
34 | ||
35 | #include <com_err.h> | |
36 | #ifdef HAVE_KRB4 | |
37 | #include <krb.h> | |
38 | #endif | |
39 | ||
40 | EXEC SQL INCLUDE sqlca; | |
41 | ||
42 | RCSID("$Header$"); | |
43 | ||
44 | char *whoami, *hostname, *shorthostname; | |
45 | ||
46 | char *find_usernames(char *first, char *middle, char *last); | |
47 | int check_username_available(char *username); | |
48 | void fixname(char *name); | |
49 | int register_user(int uid, char *username); | |
50 | void mr_com_err(const char *whoami, long code, const char *fmt, va_list pvar); | |
51 | void sigshut(int); | |
52 | ||
53 | reg_client *cl = NULL; | |
54 | enum { RS_RUNNING, RS_SLEEPING, RS_EXITING } state = RS_RUNNING; | |
55 | ||
56 | int main(int argc, char **argv) | |
57 | { | |
58 | int listener, nfds, i, clientid = 0; | |
59 | fd_set readfds, xreadfds; | |
60 | reg_client *clients; | |
61 | int nclients, clientssize; | |
62 | long status; | |
63 | char *db = "moira"; | |
64 | struct utsname uts; | |
65 | struct hostent *h; | |
66 | struct sigaction sa; | |
67 | struct stat st; | |
68 | ||
69 | whoami = strrchr(argv[0], '/'); | |
70 | whoami = whoami ? whoami + 1 : argv[0]; | |
71 | ||
72 | set_com_err_hook(mr_com_err); | |
73 | ||
74 | /* Read keys */ | |
75 | if (!read_rsa_key()) | |
76 | { | |
77 | com_err(whoami, errno, "reading RSA key"); | |
78 | exit(1); | |
79 | } | |
80 | if (!read_hmac_key()) | |
81 | { | |
82 | com_err(whoami, errno, "reading HMAC key"); | |
83 | exit(1); | |
84 | } | |
85 | ||
86 | /* Read error messages */ | |
87 | if (!read_errors()) | |
88 | { | |
89 | com_err(whoami, errno, "reading error messages"); | |
90 | exit(1); | |
91 | } | |
92 | ||
93 | /* Connect to database */ | |
94 | EXEC SQL CONNECT :db IDENTIFIED BY :db; | |
95 | if (sqlca.sqlcode) | |
96 | { | |
97 | char err_msg[256]; | |
98 | int bufsize = 256, msglength = 0; | |
99 | ||
100 | sqlglm(err_msg, &bufsize, &msglength); | |
101 | err_msg[msglength] = 0; | |
102 | com_err(whoami, 0, "SQL error connecting to DBMS:\n%s", err_msg); | |
103 | exit(1); | |
104 | } | |
105 | ||
106 | /* Get my hostname */ | |
107 | uname(&uts); | |
108 | h = gethostbyname(uts.nodename); | |
109 | if (!h) | |
110 | { | |
111 | com_err(whoami, 0, "Couldn't resolve hostname %s", uts.nodename); | |
112 | exit(1); | |
113 | } | |
114 | hostname = lowercase(xstrdup(h->h_name)); | |
115 | shorthostname = xstrdup(hostname); | |
116 | if (strchr(shorthostname, '.')) | |
117 | *strchr(shorthostname, '.') = '\0'; | |
118 | ||
119 | /* Initialize kerberos */ | |
120 | status = init_kerberos(); | |
121 | if (status) | |
122 | { | |
123 | com_err(whoami, status, "initializing kerberos library"); | |
124 | exit(1); | |
125 | } | |
126 | ||
127 | /* Set up listening socket. */ | |
128 | listener = mr_listen("moira_ureg"); | |
129 | if (listener < 0) | |
130 | { | |
131 | com_err(whoami, errno, "couldn't create listening socket"); | |
132 | exit(1); | |
133 | } | |
134 | FD_ZERO(&xreadfds); | |
135 | FD_SET(listener, &xreadfds); | |
136 | nfds = listener + 1; | |
137 | ||
138 | /* Initialize client array. */ | |
139 | nclients = 0; | |
140 | clientssize = 5; | |
141 | clients = malloc(clientssize * sizeof(reg_client)); | |
142 | if (!clients) | |
143 | { | |
144 | com_err(whoami, errno, "creating client array"); | |
145 | exit(1); | |
146 | } | |
147 | ||
148 | /* Set up signal handlers */ | |
149 | sa.sa_flags = 0; | |
150 | sigemptyset(&sa.sa_mask); | |
151 | sa.sa_handler = sigshut; | |
152 | sigaction(SIGTERM, &sa, NULL); | |
153 | sigaction(SIGINT, &sa, NULL); | |
154 | sigaction(SIGHUP, &sa, NULL); | |
155 | sa.sa_handler = SIG_IGN; | |
156 | sigaction(SIGPIPE, &sa, NULL); | |
157 | ||
158 | com_err(whoami, 0, "started (pid %d)", getpid()); | |
159 | com_err(whoami, 0, rcsid); | |
160 | ||
161 | /* Main loop */ | |
162 | while (state != RS_EXITING) | |
163 | { | |
164 | if (state == RS_RUNNING && stat(MOIRA_MOTD_FILE, &st) == 0) | |
165 | { | |
166 | state = RS_SLEEPING; | |
167 | com_err(whoami, 0, "found motd. reg_svr is sleeping"); | |
168 | } | |
169 | else if (state == RS_SLEEPING && stat(MOIRA_MOTD_FILE, &st) == -1) | |
170 | { | |
171 | state = RS_RUNNING; | |
172 | com_err(whoami, 0, "motd gone. reg_svr is running"); | |
173 | } | |
174 | ||
175 | memcpy(&readfds, &xreadfds, sizeof(readfds)); | |
176 | if (select(nfds, &readfds, NULL, NULL, NULL) == -1) | |
177 | { | |
178 | if (errno != EINTR) | |
179 | com_err(whoami, errno, "in select"); | |
180 | continue; | |
181 | } | |
182 | ||
183 | if (FD_ISSET(listener, &readfds)) | |
184 | { | |
185 | int newconn, addrlen = sizeof(struct sockaddr_in); | |
186 | struct sockaddr_in addr; | |
187 | ||
188 | newconn = accept(listener, (struct sockaddr *)&addr, &addrlen); | |
189 | if (newconn < 0) | |
190 | com_err(whoami, errno, "accepting new connection"); | |
191 | else | |
192 | { | |
193 | nclients++; | |
194 | if (nclients > clientssize) | |
195 | { | |
196 | clientssize = 2 * clientssize; | |
197 | clients = xrealloc(clients, clientssize * | |
198 | sizeof(reg_client)); | |
199 | } | |
200 | ||
201 | cl = &clients[nclients - 1]; | |
202 | memset(cl, 0, sizeof(reg_client)); | |
203 | cl->fd = newconn; | |
204 | cl->lastmod = time(NULL); | |
205 | cl->clientid = ++clientid; | |
206 | cl->random = init_rand(cl); | |
207 | FD_SET(newconn, &xreadfds); | |
208 | if (newconn >= nfds) | |
209 | nfds = newconn + 1; | |
210 | ||
211 | com_err(whoami, 0, | |
212 | "New connection from %s port %d (now %d client%s)", | |
213 | inet_ntoa(addr.sin_addr), (int)ntohs(addr.sin_port), | |
214 | nclients, nclients != 1 ? "s" : ""); | |
215 | } | |
216 | } | |
217 | ||
218 | for (i = 0; i < nclients; i++) | |
219 | { | |
220 | cl = &clients[i]; | |
221 | if (FD_ISSET(cl->fd, &readfds)) | |
222 | { | |
223 | cl->lastmod = time(NULL); | |
224 | if (!cl->buf) | |
225 | { | |
226 | /* We're just starting */ | |
227 | cl->buf = malloc(3); | |
228 | if (!cl->buf) | |
229 | { | |
230 | com_err(whoami, errno, "allocating read buffer"); | |
231 | reply(cl, INTERNAL_ERROR, "INIT", "c", NULL, | |
232 | "Out of memory"); | |
233 | goto reap; | |
234 | } | |
235 | cl->nread = 0; | |
236 | } | |
237 | ||
238 | if (cl->nread < 3) | |
239 | { | |
240 | /* We haven't read the length byte yet... */ | |
241 | cl->nread += read(cl->fd, cl->buf + cl->nread, | |
242 | 3 - cl->nread); | |
243 | if (cl->nread == 3) | |
244 | { | |
245 | cl->nmax = cl->buf[1] * 256 + cl->buf[2] + 3; | |
246 | cl->buf = realloc(cl->buf, cl->nmax + 3); | |
247 | if (!cl->buf) | |
248 | { | |
249 | com_err(whoami, errno, "reallocating read buffer"); | |
250 | reply(cl, INTERNAL_ERROR, "INIT", "c", NULL, | |
251 | "Out of memory"); | |
252 | goto reap; | |
253 | } | |
254 | } | |
255 | else if (cl->nread == 0) | |
256 | { | |
257 | /* client has closed connection. setting | |
258 | lastmod will cause it to be reaped */ | |
259 | cl->lastmod = 0; | |
260 | } | |
261 | } | |
262 | else | |
263 | { | |
264 | /* We know how long the packet is supposed to be */ | |
265 | cl->nread += read(cl->fd, cl->buf + cl->nread, | |
266 | cl->nmax - cl->nread); | |
267 | if (cl->nread == cl->nmax) | |
268 | { | |
269 | parse_packet(cl, cl->buf[0], cl->nread - 3, cl->buf + 3, | |
270 | state == RS_SLEEPING); | |
271 | free(cl->buf); | |
272 | cl->buf = NULL; | |
273 | } | |
274 | } | |
275 | } | |
276 | ||
277 | reap: | |
278 | if (cl->lastmod < time(NULL) - TIMEOUT) | |
279 | { | |
280 | com_err(whoami, 0, "Closed connection. (now %d client%s)", | |
281 | nclients - 1, nclients != 2 ? "s" : ""); | |
282 | shutdown(cl->fd, 2); | |
283 | close(cl->fd); | |
284 | FD_CLR(cl->fd, &xreadfds); | |
285 | free(cl->buf); | |
286 | free(cl->id); | |
287 | free(cl->username); | |
288 | free(cl->suggestions); | |
289 | free(cl->random); | |
290 | clients[i] = clients[--nclients]; | |
291 | i--; | |
292 | } | |
293 | } | |
294 | cl = NULL; | |
295 | } | |
296 | com_err(whoami, 0, "Exiting."); | |
297 | } | |
298 | ||
299 | void RIFO(reg_client *rc, int argc, char **argv) | |
300 | { | |
301 | EXEC SQL BEGIN DECLARE SECTION; | |
302 | char *ufirst, *umiddle, *ulast, *id; | |
303 | char login[USERS_LOGIN_SIZE], first[USERS_FIRST_SIZE]; | |
304 | char middle[USERS_MIDDLE_SIZE], last[USERS_LAST_SIZE]; | |
305 | char fullname[USERS_FIRST_SIZE + USERS_MIDDLE_SIZE + USERS_LAST_SIZE]; | |
306 | char class[USERS_TYPE_SIZE], pin[USERS_PIN_SIZE]; | |
307 | int uid, status, secure, sqlstatus, count; | |
308 | EXEC SQL END DECLARE SECTION; | |
309 | ||
310 | if (rc->uid || argc != 4) | |
311 | { | |
312 | reply(rc, PROTOCOL_ERROR, "INIT", "c", NULL); | |
313 | return; | |
314 | } | |
315 | ||
316 | ufirst = argv[0]; | |
317 | umiddle = argv[1]; | |
318 | ulast = argv[2]; | |
319 | id = argv[3]; | |
320 | ||
321 | EXEC SQL SELECT count(login) INTO :count FROM users WHERE clearid = :id; | |
322 | ||
323 | /* "ORDER BY status" so that if there's both a matching state 0 entry | |
324 | and a matching state 3 entry, we'll get the former. */ | |
325 | EXEC SQL DECLARE csr_id CURSOR FOR | |
326 | SELECT login, unix_uid, status, secure, pin, first, middle, last, type | |
327 | FROM users WHERE clearid = :id ORDER BY status; | |
328 | EXEC SQL OPEN csr_id; | |
329 | while (1) | |
330 | { | |
331 | EXEC SQL FETCH csr_id INTO :login, :uid, :status, | |
332 | :secure, :pin, :first, :middle, :last, :class; | |
333 | if (sqlca.sqlcode) | |
334 | break; | |
335 | strtrim(login); | |
336 | strtrim(first); | |
337 | strtrim(middle); | |
338 | strtrim(last); | |
339 | strtrim(class); | |
340 | strtrim(pin); | |
341 | ||
342 | /* It's possible they have both a deleted account and a status 8 | |
343 | * account. We can't compensate for that in the ORDER BY clause | |
344 | * above, so check here. If they have more than one entry and the | |
345 | * first one we get is deleted, skip it. | |
346 | */ | |
347 | if (status == US_DELETED && count > 1) | |
348 | continue; | |
349 | ||
350 | /* Check names, allowing for the possibility that Moira and the | |
351 | user might have them split up differently. eg, Mary/Ann/Singleton | |
352 | vs. Mary Ann/Singleton. */ | |
353 | if (strcasecmp(last, ulast) && strncasecmp(last, ulast, strlen(last)) && | |
354 | strncasecmp(last, ulast, strlen(ulast))) | |
355 | continue; | |
356 | if (strlen(last) > 3 && strlen(ulast) < 3) | |
357 | continue; | |
358 | if (strcasecmp(first, ufirst) && | |
359 | strncasecmp(first, ufirst, strlen(first)) && | |
360 | strncasecmp(first, ufirst, strlen(ufirst))) | |
361 | continue; | |
362 | if (strlen(first) > 3 && strlen(ufirst) < 3) | |
363 | continue; | |
364 | if (!*ufirst && !*ulast) | |
365 | continue; | |
366 | ||
367 | /* Ignore the middle name since Moira doesn't have those reliably */ | |
368 | break; | |
369 | } | |
370 | sqlstatus = sqlca.sqlcode; | |
371 | EXEC SQL CLOSE csr_id; | |
372 | ||
373 | if (sqlstatus) | |
374 | { | |
375 | reply(rc, NOT_FOUND_IN_DATABASE, "GETN", "d", NULL); | |
376 | return; | |
377 | } | |
378 | ||
379 | switch (status) | |
380 | { | |
381 | case US_REGISTERED: | |
382 | case US_ENROLLED: | |
383 | case US_ENROLL_NOT_ALLOWED: | |
384 | case US_REGISTERED_KERBEROS_ONLY: | |
385 | reply(rc, ALREADY_REGISTERED, "INIT", "c", NULL, login); | |
386 | return; | |
387 | ||
388 | case US_DELETED: | |
389 | reply(rc, ACCOUNT_DELETED, "INIT", "c", NULL, login); | |
390 | return; | |
391 | ||
392 | case US_NOT_ALLOWED: | |
393 | reply(rc, NOT_ELIGIBLE, "INIT", "c", NULL); | |
394 | return; | |
395 | ||
396 | default: | |
397 | break; | |
398 | } | |
399 | ||
400 | rc->user_status = status; | |
401 | rc->uid = uid; | |
402 | sprintf(fullname, "%s %s%s%s", first, middle, *middle ? " " : "", last); | |
403 | if (!strcmp(class, "MITS")) | |
404 | strcpy(class, "STAFF"); | |
405 | if (secure == 1) | |
406 | { | |
407 | rc->id = strdup(id); | |
408 | if (!rc->id) | |
409 | { | |
410 | com_err(whoami, errno, "in RIFO"); | |
411 | reply(rc, INTERNAL_ERROR, "INIT", "c", NULL, "Out of memory"); | |
412 | return; | |
413 | } | |
414 | } | |
415 | if (*login != '#') | |
416 | { | |
417 | rc->reserved_username = 1; | |
418 | rc->username = strdup(login); | |
419 | if (!rc->username) | |
420 | { | |
421 | com_err(whoami, errno, "in RIFO"); | |
422 | reply(rc, INTERNAL_ERROR, "INIT", "c", NULL, "Out of memory"); | |
423 | return; | |
424 | } | |
425 | } | |
426 | else | |
427 | { | |
428 | rc->suggestions = find_usernames(first, middle, last); | |
429 | if (!rc->suggestions && errno) | |
430 | { | |
431 | com_err(whoami, errno, "in RIFO"); | |
432 | reply(rc, INTERNAL_ERROR, "INIT", "c", NULL, error_message(errno)); | |
433 | return; | |
434 | } | |
435 | } | |
436 | ||
437 | if (rc->id) | |
438 | { | |
439 | if (*pin != '\0') | |
440 | reply(rc, FOUND, "GETI", "c", NULL, fullname, class); | |
441 | else | |
442 | reply(rc, FOUND, "GETW", "c", NULL, fullname, class); | |
443 | } | |
444 | else if (!rc->username) | |
445 | reply(rc, FOUND, "GETL", "c", rc->suggestions, fullname, class); | |
446 | else | |
447 | { | |
448 | if (rc->user_status == US_NO_LOGIN_YET || | |
449 | rc->user_status == US_NO_LOGIN_YET_KERBEROS_ONLY) | |
450 | { | |
451 | status = check_kerberos(login); | |
452 | if (status == MR_SUCCESS && | |
453 | rc->user_status != US_NO_LOGIN_YET_KERBEROS_ONLY) | |
454 | status = register_user(rc->uid, login); | |
455 | if (status == MR_IN_USE) | |
456 | { | |
457 | reply(rc, RESERVED_USERNAME_UNAVAILABLE, "INIT", "c", NULL, | |
458 | rc->username); | |
459 | return; | |
460 | } | |
461 | else if (status == MR_DOWN) | |
462 | { | |
463 | reply(rc, DATABASE_CLOSED, "INIT", "c", NULL); | |
464 | return; | |
465 | } | |
466 | else if (status != MR_SUCCESS) | |
467 | { | |
468 | reply(rc, INTERNAL_ERROR, "INIT", "c", NULL, | |
469 | error_message(status)); | |
470 | return; | |
471 | } | |
472 | } | |
473 | reply(rc, FORCED_USERNAME, "GETP", "c", NULL, rc->username); | |
474 | } | |
475 | } | |
476 | ||
477 | void SWRD(reg_client *rc, int argc, char **argv) | |
478 | { | |
479 | char *words[6]; | |
480 | int i; | |
481 | ||
482 | if (!rc->id || argc != 6) | |
483 | { | |
484 | reply(rc, PROTOCOL_ERROR, "INIT", "c", NULL); | |
485 | return; | |
486 | } | |
487 | ||
488 | getwordlist(rc->id, words); | |
489 | for (i = 0; i < 6; i++) | |
490 | { | |
491 | if (strcasecmp(strtrim(argv[i]), words[i])) | |
492 | break; | |
493 | } | |
494 | if (i != 6) | |
495 | { | |
496 | reply(rc, BAD_SIX_WORDS, "GETW", "d", NULL); | |
497 | return; | |
498 | } | |
499 | ||
500 | free(rc->id); | |
501 | rc->id = NULL; | |
502 | if (!rc->username) | |
503 | reply(rc, NO_MESSAGE, "GETL", "c", rc->suggestions); | |
504 | else | |
505 | reply(rc, FORCED_USERNAME, "GETP", "c", NULL, rc->username); | |
506 | } | |
507 | ||
508 | void SPIN(reg_client *rc, int argc, char **argv) | |
509 | { | |
510 | EXEC SQL BEGIN DECLARE SECTION; | |
511 | char pin[USERS_PIN_SIZE]; | |
512 | EXEC SQL END DECLARE SECTION; | |
513 | ||
514 | if (!rc->id || argc != 1) | |
515 | { | |
516 | reply(rc, PROTOCOL_ERROR, "INIT", "c", NULL); | |
517 | return; | |
518 | } | |
519 | ||
520 | EXEC SQL SELECT pin INTO :pin FROM users WHERE clearid = :rc->id | |
521 | AND status = :rc->user_status; | |
522 | strtrim(pin); | |
523 | if (strcmp(argv[0], pin) != 0) | |
524 | { | |
525 | reply(rc, BAD_PIN, "GETI", "d", NULL); | |
526 | return; | |
527 | } | |
528 | ||
529 | free(rc->id); | |
530 | rc->id = NULL; | |
531 | if (!rc->username) | |
532 | reply(rc, NO_MESSAGE, "GETL", "c", rc->suggestions); | |
533 | else | |
534 | { | |
535 | register_user(rc->uid, rc->username); | |
536 | reply(rc, FORCED_USERNAME, "GETP", "c", NULL, rc->username); | |
537 | } | |
538 | } | |
539 | ||
540 | void CLGN(reg_client *rc, int argc, char **argv) | |
541 | { | |
542 | int i; | |
543 | char *login; | |
544 | long status; | |
545 | ||
546 | if (!rc->uid || rc->id || rc->username || argc != 1) | |
547 | { | |
548 | reply(rc, PROTOCOL_ERROR, "INIT", "c", NULL); | |
549 | return; | |
550 | } | |
551 | ||
552 | login = argv[0]; | |
553 | ||
554 | /* make sure someone's not trying to overrun reply */ | |
555 | if (strlen(login) > 100) | |
556 | { | |
557 | com_err(whoami, 0, "Buffer overrun attempted? Closing connection"); | |
558 | rc->lastmod = 0; | |
559 | return; | |
560 | } | |
561 | ||
562 | if ((strlen(login) < 3) || (strlen(login) > USERS_LOGIN_SIZE - 1) || | |
563 | (login[0] == '_') || isdigit(login[0])) | |
564 | { | |
565 | reply(rc, BAD_USERNAME, "GETL", "c", rc->suggestions, login, | |
566 | 3, USERS_LOGIN_SIZE - 1); | |
567 | return; | |
568 | } | |
569 | ||
570 | for (i = 0; i < strlen(login); i++) | |
571 | { | |
572 | if (!islower(login[i]) && !isdigit(login[i]) && (login[i] != '_')) | |
573 | { | |
574 | reply(rc, BAD_USERNAME, "GETL", "c", rc->suggestions, login, | |
575 | 3, USERS_LOGIN_SIZE - 1); | |
576 | return; | |
577 | } | |
578 | } | |
579 | ||
580 | status = check_kerberos(login); | |
581 | if (status == MR_SUCCESS) | |
582 | { | |
583 | status = check_username_available(login); | |
584 | if (status == MR_SUCCESS) | |
585 | { | |
586 | reply(rc, USERNAME_AVAILABLE, "LOGC", "c", login, login); | |
587 | return; | |
588 | } | |
589 | } | |
590 | ||
591 | if (status == MR_IN_USE) | |
592 | { | |
593 | if (rc->reserved_username) | |
594 | { | |
595 | reply(rc, RESERVED_USERNAME_UNAVAILABLE, "INIT", "c", NULL, | |
596 | rc->username); | |
597 | return; | |
598 | } | |
599 | reply(rc, USERNAME_UNAVAILABLE, "GETL", "c", rc->suggestions); | |
600 | return; | |
601 | } | |
602 | else if (status == MR_DOWN) | |
603 | { | |
604 | reply(rc, DATABASE_CLOSED, "INIT", "c", NULL); | |
605 | return; | |
606 | } | |
607 | else if (status != MR_SUCCESS) | |
608 | { | |
609 | reply(rc, INTERNAL_ERROR, "INIT", "c", NULL, error_message(status)); | |
610 | return; | |
611 | } | |
612 | } | |
613 | ||
614 | void LOGN(reg_client *rc, int argc, char **argv) | |
615 | { | |
616 | int i; | |
617 | char *login; | |
618 | long status; | |
619 | ||
620 | if (!rc->uid || rc->id || rc->username || argc != 1) | |
621 | { | |
622 | reply(rc, PROTOCOL_ERROR, "INIT", "c", NULL); | |
623 | return; | |
624 | } | |
625 | ||
626 | login = argv[0]; | |
627 | ||
628 | /* make sure someone's not trying to overrun reply */ | |
629 | if (strlen(login) > 100) | |
630 | { | |
631 | com_err(whoami, 0, "Buffer overrun attempted? Closing connection"); | |
632 | rc->lastmod = 0; | |
633 | return; | |
634 | } | |
635 | ||
636 | if ((strlen(login) < 3) || (strlen(login) > USERS_LOGIN_SIZE - 1) || | |
637 | (login[0] == '_') || isdigit(login[0])) | |
638 | { | |
639 | reply(rc, BAD_USERNAME, "GETL", "c", rc->suggestions, login, | |
640 | 3, USERS_LOGIN_SIZE - 1); | |
641 | return; | |
642 | } | |
643 | ||
644 | for (i = 0; i < strlen(login); i++) | |
645 | { | |
646 | if (!islower(login[i]) && !isdigit(login[i]) && (login[i] != '_')) | |
647 | { | |
648 | reply(rc, BAD_USERNAME, "GETL", "c", rc->suggestions, login, | |
649 | 3, USERS_LOGIN_SIZE - 1); | |
650 | return; | |
651 | } | |
652 | } | |
653 | ||
654 | status = check_kerberos(login); | |
655 | if (status == MR_SUCCESS) | |
656 | { | |
657 | if (rc->user_status == US_NO_LOGIN_YET_KERBEROS_ONLY) | |
658 | EXEC SQL UPDATE users SET login = :login WHERE unix_uid = :rc->uid; | |
659 | else | |
660 | status = register_user(rc->uid, login); | |
661 | } | |
662 | if (status == MR_IN_USE) | |
663 | { | |
664 | if (rc->reserved_username) | |
665 | { | |
666 | reply(rc, RESERVED_USERNAME_UNAVAILABLE, "INIT", "c", NULL, | |
667 | rc->username); | |
668 | return; | |
669 | } | |
670 | reply(rc, USERNAME_UNAVAILABLE, "GETL", "c", rc->suggestions); | |
671 | return; | |
672 | } | |
673 | else if (status == MR_DOWN) | |
674 | { | |
675 | reply(rc, DATABASE_CLOSED, "INIT", "c", NULL); | |
676 | return; | |
677 | } | |
678 | else if (status != MR_SUCCESS) | |
679 | { | |
680 | reply(rc, INTERNAL_ERROR, "INIT", "c", NULL, error_message(status)); | |
681 | return; | |
682 | } | |
683 | ||
684 | rc->username = strdup(login); | |
685 | if (!rc->username) | |
686 | { | |
687 | com_err(whoami, errno, "in LOGN"); | |
688 | reply(rc, INTERNAL_ERROR, "INIT", "c", NULL, "Out of memory"); | |
689 | return; | |
690 | } | |
691 | reply(rc, USERNAME_OK, "GETP", "c", NULL, login); | |
692 | } | |
693 | ||
694 | int ctypes[256] = { | |
695 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* ^@ - ^O */ | |
696 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* ^P - ^_ */ | |
697 | 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* SPACE - / */ | |
698 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, /* 0 - ? */ | |
699 | 2, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, /* : - O */ | |
700 | 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, /* P - _ */ | |
701 | 2, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, /* ` - o */ | |
702 | 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 0, /* p - ^? */ | |
703 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
704 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
705 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
706 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
707 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
708 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
709 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
710 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
711 | }; | |
712 | ||
713 | void PSWD(reg_client *rc, int argc, char **argv) | |
714 | { | |
715 | long status; | |
716 | char *password = argv[0], *p; | |
717 | EXEC SQL BEGIN DECLARE SECTION; | |
718 | char *login = rc->username; | |
719 | EXEC SQL END DECLARE SECTION; | |
720 | ||
721 | if (!rc->username || rc->id || argc != 1) | |
722 | { | |
723 | reply(rc, PROTOCOL_ERROR, "INIT", "c", NULL); | |
724 | return; | |
725 | } | |
726 | ||
727 | /* password quality checking */ | |
728 | if (strlen(password) < 4) | |
729 | { | |
730 | reply(rc, PASSWORD_SHORT, "GETP", "c", NULL); | |
731 | return; | |
732 | } | |
733 | ||
734 | if (strlen(password) < 7) | |
735 | { | |
736 | for (p = password + 1; *p; p++) | |
737 | { | |
738 | if (ctypes[*p] != ctypes[*(p - 1)]) | |
739 | break; | |
740 | } | |
741 | if (!*p) | |
742 | { | |
743 | reply(rc, PASSWORD_SIMPLE, "GETP", "c", NULL); | |
744 | return; | |
745 | } | |
746 | } | |
747 | ||
748 | if (!strcasecmp(password, "GykoR-66") || | |
749 | !strcasecmp(password, "slaRooBey") || | |
750 | !strcasecmp(password, "krang-its") || | |
751 | !strcasecmp(password, "2HotPeetzas") || | |
752 | !strcasecmp(password, "ItzAGurl")) | |
753 | { | |
754 | reply(rc, PASSWORD_SAMPLE, "GETP", "c", NULL); | |
755 | return; | |
756 | } | |
757 | ||
758 | status = register_kerberos(rc->username, password); | |
759 | if (status == MR_QUALITY) | |
760 | { | |
761 | reply(rc, PASSWORD_SIMPLE, "GETP", "c", NULL); | |
762 | return; | |
763 | } | |
764 | else if (status == MR_IN_USE) | |
765 | { | |
766 | reply(rc, RESERVED_USERNAME_UNAVAILABLE, "INIT", "c", NULL, | |
767 | rc->username); | |
768 | return; | |
769 | } | |
770 | else if (status) | |
771 | { | |
772 | com_err(whoami, status, "registering username with Kerberos"); | |
773 | reply(rc, KADM_ERROR, "INIT", "c", NULL, error_message(status)); | |
774 | return; | |
775 | } | |
776 | ||
777 | if (rc->user_status == US_NO_LOGIN_YET_KERBEROS_ONLY) | |
778 | EXEC SQL UPDATE users SET status = 9 WHERE login = :login; | |
779 | else | |
780 | EXEC SQL UPDATE users SET status = 1 WHERE login = :login; | |
781 | EXEC SQL COMMIT; | |
782 | ||
783 | reply(rc, DONE, "INIT", "c", NULL, rc->username); | |
784 | } | |
785 | ||
786 | void QUIT(reg_client *rc, int argc, char **argv) | |
787 | { | |
788 | } | |
789 | ||
790 | /* Register a user in Moira */ | |
791 | int register_user(int uid, char *username) | |
792 | { | |
793 | EXEC SQL BEGIN DECLARE SECTION; | |
794 | char class[USERS_TYPE_SIZE]; | |
795 | EXEC SQL END DECLARE SECTION; | |
796 | char uidbuf[10], *qargv[3], *motd = NULL; | |
797 | long status; | |
798 | ||
799 | status = mr_connect(hostname); | |
800 | if (status) | |
801 | return status; | |
802 | ||
803 | status = mr_motd(&motd); | |
804 | if (status || motd) | |
805 | { | |
806 | mr_disconnect(); | |
807 | return MR_DOWN; | |
808 | } | |
809 | ||
810 | status = mr_krb5_auth("reg_svr"); | |
811 | if (status) | |
812 | { | |
813 | com_err(whoami, status, "authenticating to moira"); | |
814 | mr_disconnect(); | |
815 | return MR_INTERNAL; | |
816 | } | |
817 | ||
818 | EXEC SQL SELECT type INTO :class FROM users WHERE unix_uid = :uid; | |
819 | ||
820 | sprintf(uidbuf, "%d", uid); | |
821 | qargv[0] = uidbuf; | |
822 | qargv[1] = username; | |
823 | ||
824 | /* Incoming students should be given Exchange poboxes. | |
825 | * Doesn't work for undergrads in the class of 2100 or higher. | |
826 | */ | |
827 | if (!strcmp(strtrim(class), "G") || !strncmp(class, "FALL", 4) || | |
828 | !strncmp(class, "SPRING", 5) || !strncmp(class, "SUMMER", 6) || | |
829 | !strncmp(class, "20", 2)) | |
830 | { | |
831 | com_err(whoami, 0, "assigning EXCHANGE pobox to user %s, class %s", username, class); | |
832 | qargv[2] = "EXCHANGE"; | |
833 | } | |
834 | else | |
835 | { | |
836 | com_err(whoami, 0, "assigning IMAP pobox to user %s, class %s", username, class); | |
837 | qargv[2] = "IMAP"; | |
838 | } | |
839 | ||
840 | status = mr_query("register_user", 3, qargv, NULL, NULL); | |
841 | mr_disconnect(); | |
842 | return status; | |
843 | } | |
844 | ||
845 | ||
846 | /* Find some typical available usernames */ | |
847 | ||
848 | char *uname_patterns[] = { | |
849 | "FL", /* johndoe */ | |
850 | "fmllllll", /* jmdoe... (last name truncated) */ | |
851 | "flllllll", /* jdoe.... ("") */ | |
852 | "llllllll", /* doe..... ("") */ | |
853 | "fml", /* jmd */ | |
854 | "Fl", /* johnd */ | |
855 | "Lf", /* doej */ | |
856 | "Lfm", /* doejm */ | |
857 | "F", /* john */ | |
858 | }; | |
859 | int num_patterns = sizeof(uname_patterns) / sizeof(char *); | |
860 | ||
861 | char *find_usernames(char *first, char *middle, char *last) | |
862 | { | |
863 | EXEC SQL BEGIN DECLARE SECTION; | |
864 | char username[2 * USERS_LOGIN_SIZE]; | |
865 | int count; | |
866 | EXEC SQL END DECLARE SECTION; | |
867 | int pat, len; | |
868 | char *pp, *up, *fp, *mp, *lp, *unames = NULL; | |
869 | ||
870 | fixname(first); | |
871 | fixname(middle); | |
872 | fixname(last); | |
873 | ||
874 | for (pat = 0; pat < num_patterns; pat++) | |
875 | { | |
876 | up = username; | |
877 | fp = first; | |
878 | mp = middle; | |
879 | lp = last; | |
880 | for (pp = uname_patterns[pat]; *pp; pp++) | |
881 | { | |
882 | switch (*pp) | |
883 | { | |
884 | case 'f': | |
885 | if (*fp) | |
886 | *up++ = *fp++; | |
887 | break; | |
888 | ||
889 | case 'F': | |
890 | if (up - username + strlen(first) < USERS_LOGIN_SIZE) | |
891 | up += sprintf(up, "%s", first); | |
892 | else | |
893 | goto nextpattern; | |
894 | break; | |
895 | ||
896 | case 'm': | |
897 | if (!*middle) | |
898 | goto nextpattern; | |
899 | if (*mp) | |
900 | *up++ = *mp++; | |
901 | break; | |
902 | ||
903 | case 'l': | |
904 | if (*lp) | |
905 | *up++ = *lp++; | |
906 | break; | |
907 | ||
908 | case 'L': | |
909 | if (up - username + strlen(last) < USERS_LOGIN_SIZE) | |
910 | up += sprintf(up, "%s", last); | |
911 | else | |
912 | goto nextpattern; | |
913 | break; | |
914 | } | |
915 | } | |
916 | *up = '\0'; | |
917 | ||
918 | if (strlen(username) < 3 || strlen(username) >= USERS_LOGIN_SIZE) | |
919 | continue; | |
920 | ||
921 | EXEC SQL SELECT COUNT(login) INTO :count FROM users | |
922 | WHERE login = :username; | |
923 | if (sqlca.sqlcode) | |
924 | { | |
925 | errno = MR_DBMS_ERR; | |
926 | return NULL; | |
927 | } | |
928 | if (count == 0) | |
929 | { | |
930 | EXEC SQL SELECT COUNT(name) INTO :count FROM list | |
931 | WHERE name = :username; | |
932 | if (sqlca.sqlcode) | |
933 | { | |
934 | errno = MR_DBMS_ERR; | |
935 | return NULL; | |
936 | } | |
937 | } | |
938 | if (count == 0) | |
939 | { | |
940 | EXEC SQL SELECT COUNT(label) INTO :count FROM filesys | |
941 | WHERE label = :username; | |
942 | if (sqlca.sqlcode) | |
943 | { | |
944 | errno = MR_DBMS_ERR; | |
945 | return NULL; | |
946 | } | |
947 | } | |
948 | ||
949 | if (count == 0) | |
950 | { | |
951 | if (unames) | |
952 | { | |
953 | unames = realloc(unames, strlen(unames) + strlen(username) + 3); | |
954 | if (!unames) | |
955 | return NULL; | |
956 | strcat(unames, ", "); | |
957 | strcat(unames, username); | |
958 | } | |
959 | else | |
960 | { | |
961 | unames = strdup(username); | |
962 | if (!unames) | |
963 | return NULL; | |
964 | } | |
965 | } | |
966 | ||
967 | nextpattern: | |
968 | ; | |
969 | } | |
970 | ||
971 | /* unames will be NULL if we couldn't suggest a username. Clear | |
972 | errno so the caller can distinguish this from an error case. */ | |
973 | errno = 0; | |
974 | return unames; | |
975 | } | |
976 | ||
977 | /* This does the database-side checks to make sure a username is | |
978 | * available. | |
979 | */ | |
980 | int check_username_available(char *username) | |
981 | { | |
982 | int count; | |
983 | ||
984 | EXEC SQL SELECT COUNT(login) INTO :count FROM users | |
985 | WHERE login = :username; | |
986 | if (sqlca.sqlcode) | |
987 | return MR_DBMS_ERR; | |
988 | if (count != 0) | |
989 | return MR_IN_USE; | |
990 | ||
991 | EXEC SQL SELECT COUNT(name) INTO :count FROM list | |
992 | WHERE name = :username; | |
993 | if (sqlca.sqlcode) | |
994 | return MR_DBMS_ERR; | |
995 | if (count != 0) | |
996 | return MR_IN_USE; | |
997 | ||
998 | EXEC SQL SELECT COUNT(label) INTO :count FROM filesys | |
999 | WHERE label = :username; | |
1000 | if (sqlca.sqlcode) | |
1001 | return MR_DBMS_ERR; | |
1002 | if (count != 0) | |
1003 | return MR_IN_USE; | |
1004 | ||
1005 | EXEC SQL SELECT COUNT(login) INTO :count FROM userhistory | |
1006 | WHERE login = :username; | |
1007 | if (sqlca.sqlcode) | |
1008 | return MR_DBMS_ERR; | |
1009 | if (count != 0) | |
1010 | return MR_IN_USE; | |
1011 | ||
1012 | return MR_SUCCESS; | |
1013 | } | |
1014 | ||
1015 | void fixname(char *name) | |
1016 | { | |
1017 | char *s, *d; | |
1018 | ||
1019 | for (s = d = name; *s; s++) | |
1020 | { | |
1021 | if (isalnum(*s)) | |
1022 | *d++ = tolower(*s); | |
1023 | } | |
1024 | *d = '\0'; | |
1025 | } | |
1026 | ||
1027 | void *xmalloc(size_t bytes) | |
1028 | { | |
1029 | void *buf = malloc(bytes); | |
1030 | ||
1031 | if (buf) | |
1032 | return buf; | |
1033 | ||
1034 | com_err(whoami, errno, "in xmalloc"); | |
1035 | exit(1); | |
1036 | } | |
1037 | ||
1038 | void *xrealloc(void *ptr, size_t bytes) | |
1039 | { | |
1040 | void *buf = realloc(ptr, bytes); | |
1041 | ||
1042 | if (buf) | |
1043 | return buf; | |
1044 | ||
1045 | com_err(whoami, errno, "in xrealloc"); | |
1046 | exit(1); | |
1047 | } | |
1048 | ||
1049 | char *xstrdup(char *str) | |
1050 | { | |
1051 | char *buf = strdup(str); | |
1052 | ||
1053 | if (buf) | |
1054 | return buf; | |
1055 | ||
1056 | com_err(whoami, errno, "in xstrdup"); | |
1057 | exit(1); | |
1058 | } | |
1059 | ||
1060 | void mr_com_err(const char *whoami, long code, const char *fmt, va_list pvar) | |
1061 | { | |
1062 | if (whoami) | |
1063 | { | |
1064 | fputs(whoami, stderr); | |
1065 | if (cl) | |
1066 | fprintf(stderr, "[#%d]", cl->clientid); | |
1067 | fputs(": ", stderr); | |
1068 | } | |
1069 | if (code) { | |
1070 | fputs(error_message(code), stderr); | |
1071 | fputs(" ", stderr); | |
1072 | } | |
1073 | if (fmt) | |
1074 | vfprintf(stderr, fmt, pvar); | |
1075 | putc('\n', stderr); | |
1076 | } | |
1077 | ||
1078 | void sigshut(int sig) | |
1079 | { | |
1080 | state = RS_EXITING; | |
1081 | } |