3 * Server for user registration with Moira and Kerberos.
5 * Copyright (C) 1987-1998 by the Massachusetts Institute of Technology
6 * For copying and distribution information, please see the file
10 #include <mit-copyright.h>
12 #include <mr_private.h>
13 #include <moira_schema.h>
14 #include <moira_site.h>
17 #include <sys/types.h>
18 #include <sys/socket.h>
21 #include <sys/utsname.h>
23 #include <netinet/in.h>
38 EXEC SQL INCLUDE sqlca;
42 char *whoami, *hostname, *shorthostname;
44 char *find_usernames(char *first, char *middle, char *last);
45 void fixname(char *name);
46 int register_user(int uid, char *username);
47 void mr_com_err(const char *whoami, long code, const char *fmt, va_list pvar);
50 reg_client *cl = NULL;
51 enum { RS_RUNNING, RS_SLEEPING, RS_EXITING } state = RS_RUNNING;
53 int main(int argc, char **argv)
55 int listener, nfds, i, clientid = 0;
56 fd_set readfds, xreadfds;
58 int nclients, clientssize;
66 whoami = strrchr(argv[0], '/');
67 whoami = whoami ? whoami + 1 : argv[0];
69 set_com_err_hook(mr_com_err);
74 com_err(whoami, errno, "reading RSA key");
79 com_err(whoami, errno, "reading HMAC key");
83 /* Read error messages */
86 com_err(whoami, errno, "reading error messages");
90 /* Connect to database */
91 EXEC SQL CONNECT :db IDENTIFIED BY :db;
95 int bufsize = 256, msglength = 0;
97 sqlglm(err_msg, &bufsize, &msglength);
98 err_msg[msglength] = 0;
99 com_err(whoami, 0, "SQL error connecting to DBMS:\n%s", err_msg);
103 /* Get my hostname */
105 h = gethostbyname(uts.nodename);
108 com_err(whoami, 0, "Couldn't resolve hostname %s", uts.nodename);
111 hostname = lowercase(xstrdup(h->h_name));
112 shorthostname = xstrdup(hostname);
113 if (strchr(shorthostname, '.'))
114 *strchr(shorthostname, '.') = '\0';
116 /* Initialize kerberos */
117 status = init_kerberos();
120 com_err(whoami, status, "initializing kerberos library");
124 /* Set up listening socket. */
125 listener = mr_listen("moira_ureg");
128 com_err(whoami, errno, "couldn't create listening socket");
132 FD_SET(listener, &xreadfds);
135 /* Initialize client array. */
138 clients = malloc(clientssize * sizeof(reg_client));
141 com_err(whoami, errno, "creating client array");
145 /* Set up signal handlers */
147 sigemptyset(&sa.sa_mask);
148 sa.sa_handler = sigshut;
149 sigaction(SIGTERM, &sa, NULL);
150 sigaction(SIGINT, &sa, NULL);
151 sigaction(SIGHUP, &sa, NULL);
152 sa.sa_handler = SIG_IGN;
153 sigaction(SIGPIPE, &sa, NULL);
155 com_err(whoami, 0, "started (pid %d)", getpid());
156 com_err(whoami, 0, rcsid);
159 while (state != RS_EXITING)
161 if (state == RS_RUNNING && stat(MOIRA_MOTD_FILE, &st) == 0)
164 com_err(whoami, 0, "found motd. reg_svr is sleeping");
166 else if (state == RS_SLEEPING && stat(MOIRA_MOTD_FILE, &st) == -1)
169 com_err(whoami, 0, "motd gone. reg_svr is running");
172 memcpy(&readfds, &xreadfds, sizeof(readfds));
173 if (select(nfds, &readfds, NULL, NULL, NULL) == -1)
176 com_err(whoami, errno, "in select");
180 if (FD_ISSET(listener, &readfds))
182 int newconn, addrlen = sizeof(struct sockaddr_in);
183 struct sockaddr_in addr;
185 newconn = accept(listener, (struct sockaddr *)&addr, &addrlen);
187 com_err(whoami, errno, "accepting new connection");
191 if (nclients > clientssize)
193 clientssize = 2 * clientssize;
194 clients = xrealloc(clients, clientssize *
198 cl = &clients[nclients - 1];
199 memset(cl, 0, sizeof(reg_client));
201 cl->lastmod = time(NULL);
202 cl->clientid = ++clientid;
203 cl->random = init_rand(cl);
204 FD_SET(newconn, &xreadfds);
209 "New connection from %s port %d (now %d client%s)",
210 inet_ntoa(addr.sin_addr), (int)ntohs(addr.sin_port),
211 nclients, nclients != 1 ? "s" : "");
215 for (i = 0; i < nclients; i++)
218 if (FD_ISSET(cl->fd, &readfds))
220 cl->lastmod = time(NULL);
223 /* We're just starting */
227 com_err(whoami, errno, "allocating read buffer");
228 reply(cl, INTERNAL_ERROR, "INIT", "c", NULL,
237 /* We haven't read the length byte yet... */
238 cl->nread += read(cl->fd, cl->buf + cl->nread,
242 cl->nmax = cl->buf[1] * 256 + cl->buf[2] + 3;
243 cl->buf = realloc(cl->buf, cl->nmax + 3);
246 com_err(whoami, errno, "reallocating read buffer");
247 reply(cl, INTERNAL_ERROR, "INIT", "c", NULL,
252 else if (cl->nread == 0)
254 /* client has closed connection. setting
255 lastmod will cause it to be reaped */
261 /* We know how long the packet is supposed to be */
262 cl->nread += read(cl->fd, cl->buf + cl->nread,
263 cl->nmax - cl->nread);
264 if (cl->nread == cl->nmax)
266 parse_packet(cl, cl->buf[0], cl->nread - 3, cl->buf + 3,
267 state == RS_SLEEPING);
275 if (cl->lastmod < time(NULL) - TIMEOUT)
277 com_err(whoami, 0, "Closed connection. (now %d client%s)",
278 nclients - 1, nclients != 2 ? "s" : "");
281 FD_CLR(cl->fd, &xreadfds);
285 free(cl->suggestions);
287 clients[i] = clients[--nclients];
293 com_err(whoami, 0, "Exiting.");
296 void RIFO(reg_client *rc, int argc, char **argv)
298 EXEC SQL BEGIN DECLARE SECTION;
299 char *ufirst, *umiddle, *ulast, *id;
300 char login[USERS_LOGIN_SIZE], first[USERS_FIRST_SIZE];
301 char middle[USERS_MIDDLE_SIZE], last[USERS_LAST_SIZE];
302 char fullname[USERS_FIRST_SIZE + USERS_MIDDLE_SIZE + USERS_LAST_SIZE];
303 char class[USERS_TYPE_SIZE];
304 int uid, status, secure, sqlstatus;
305 EXEC SQL END DECLARE SECTION;
307 if (rc->uid || argc != 4)
309 reply(rc, PROTOCOL_ERROR, "INIT", "c", NULL);
318 /* "ORDER BY status" so that if there's both a matching state 0 entry
319 and a matching state 3 entry, we'll get the former. */
320 EXEC SQL DECLARE csr_id CURSOR FOR
321 SELECT login, unix_uid, status, secure, first, middle, last, type
322 FROM users WHERE clearid = :id ORDER BY status;
323 EXEC SQL OPEN csr_id;
326 EXEC SQL FETCH csr_id INTO :login, :uid, :status,
327 :secure, :first, :middle, :last, :class;
336 /* Check names, allowing for the possibility that Moira and the
337 user might have them split up differently. eg, Mary/Ann/Singleton
338 vs. Mary Ann/Singleton. */
339 if (strcasecmp(last, ulast) && strncasecmp(last, ulast, strlen(last)) &&
340 strncasecmp(last, ulast, strlen(ulast)))
342 if (strlen(last) > 3 && strlen(ulast) < 3)
344 if (strcasecmp(first, ufirst) &&
345 strncasecmp(first, ufirst, strlen(first)) &&
346 strncasecmp(first, ufirst, strlen(ufirst)))
348 if (strlen(first) > 3 && strlen(ufirst) < 3)
350 /* Ignore the middle name since Moira doesn't have those reliably */
353 sqlstatus = sqlca.sqlcode;
354 EXEC SQL CLOSE csr_id;
358 reply(rc, NOT_FOUND_IN_DATABASE, "GETN", "d", NULL);
366 case US_ENROLL_NOT_ALLOWED:
367 reply(rc, ALREADY_REGISTERED, "INIT", "c", NULL, login);
371 reply(rc, ACCOUNT_DELETED, "INIT", "c", NULL, login);
375 reply(rc, NOT_ELIGIBLE, "INIT", "c", NULL);
383 sprintf(fullname, "%s %s%s%s", first, middle, *middle ? " " : "", last);
384 if (!strcmp(class, "MITS"))
385 strcpy(class, "STAFF");
391 com_err(whoami, errno, "in RIFO");
392 reply(rc, INTERNAL_ERROR, "INIT", "c", NULL, "Out of memory");
398 rc->reserved_username = 1;
399 rc->username = strdup(login);
402 com_err(whoami, errno, "in RIFO");
403 reply(rc, INTERNAL_ERROR, "INIT", "c", NULL, "Out of memory");
409 rc->suggestions = find_usernames(first, middle, last);
410 if (!rc->suggestions && errno)
412 com_err(whoami, errno, "in RIFO");
413 reply(rc, INTERNAL_ERROR, "INIT", "c", NULL, error_message(errno));
419 reply(rc, FOUND, "GETW", "c", NULL, fullname, class);
420 else if (!rc->username)
421 reply(rc, FOUND, "GETL", "c", rc->suggestions, fullname, class);
423 reply(rc, FORCED_USERNAME, "GETP", "c", NULL, rc->username);
426 void SWRD(reg_client *rc, int argc, char **argv)
431 if (!rc->id || argc != 6)
433 reply(rc, PROTOCOL_ERROR, "INIT", "c", NULL);
437 getwordlist(rc->id, words);
438 for (i = 0; i < 6; i++)
440 if (strcasecmp(strtrim(argv[i]), words[i]))
445 reply(rc, BAD_SIX_WORDS, "GETW", "d", NULL);
452 reply(rc, NO_MESSAGE, "GETL", "c", rc->suggestions);
454 reply(rc, FORCED_USERNAME, "GETP", "c", NULL, rc->username);
457 void LOGN(reg_client *rc, int argc, char **argv)
463 if (!rc->uid || rc->id || rc->username || argc != 1)
465 reply(rc, PROTOCOL_ERROR, "INIT", "c", NULL);
471 /* make sure someone's not trying to overrun reply */
472 if (strlen(login) > 100)
474 com_err(whoami, 0, "Buffer overrun attempted? Closing connection");
479 if ((strlen(login) < 3) || (strlen(login) > USERS_LOGIN_SIZE - 1) ||
480 (login[0] == '_') || isdigit(login[0]))
482 reply(rc, BAD_USERNAME, "GETL", "c", rc->suggestions, login,
483 3, USERS_LOGIN_SIZE - 1);
487 for (i = 0; i < strlen(login); i++)
489 if (!islower(login[i]) && !isdigit(login[i]) && (login[i] != '_'))
491 reply(rc, BAD_USERNAME, "GETL", "c", rc->suggestions, login,
492 3, USERS_LOGIN_SIZE - 1);
497 status = check_kerberos(login);
498 if (status == MR_SUCCESS)
499 status = register_user(rc->uid, login);
501 if (status == MR_IN_USE)
503 if (rc->reserved_username)
505 reply(rc, RESERVED_USERNAME_UNAVAILABLE, "INIT", "c", NULL,
509 reply(rc, USERNAME_UNAVAILABLE, "GETL", "c", rc->suggestions);
512 else if (status == MR_DOWN)
514 reply(rc, DATABASE_CLOSED, "INIT", "c", NULL);
517 else if (status != MR_SUCCESS)
519 reply(rc, INTERNAL_ERROR, "INIT", "c", NULL, error_message(status));
523 rc->username = strdup(login);
526 com_err(whoami, errno, "in LOGN");
527 reply(rc, INTERNAL_ERROR, "INIT", "c", NULL, "Out of memory");
530 reply(rc, USERNAME_OK, "GETP", "c", NULL, login);
534 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* ^@ - ^O */
535 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* ^P - ^_ */
536 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* SPACE - / */
537 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, /* 0 - ? */
538 2, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, /* : - O */
539 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, /* P - _ */
540 2, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, /* ` - o */
541 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 0, /* p - ^? */
542 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
543 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
544 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
545 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
546 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
547 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
548 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
549 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
552 void PSWD(reg_client *rc, int argc, char **argv)
555 char *password = argv[0], *p;
556 EXEC SQL BEGIN DECLARE SECTION;
557 char *login = rc->username;
558 EXEC SQL END DECLARE SECTION;
560 if (!rc->username || rc->id || argc != 1)
562 reply(rc, PROTOCOL_ERROR, "INIT", "c", NULL);
566 /* password quality checking */
567 if (strlen(password) < 4)
569 reply(rc, PASSWORD_SHORT, "GETP", "c", NULL);
573 if (strlen(password) < 7)
575 for (p = password + 1; *p; p++)
577 if (ctypes[*p] != ctypes[*(p - 1)])
582 reply(rc, PASSWORD_SIMPLE, "GETP", "c", NULL);
587 if (!strcasecmp(password, "GykoR-66") ||
588 !strcasecmp(password, "slaRooBey") ||
589 !strcasecmp(password, "krang-its") ||
590 !strcasecmp(password, "2HotPeetzas") ||
591 !strcasecmp(password, "ItzAGurl"))
593 reply(rc, PASSWORD_SAMPLE, "GETP", "c", NULL);
597 status = register_kerberos(rc->username, password);
598 if (status == MR_IN_USE)
600 reply(rc, RESERVED_USERNAME_UNAVAILABLE, "INIT", "c", NULL,
606 com_err(whoami, status, "registering username with Kerberos");
607 reply(rc, KADM_ERROR, "INIT", "c", NULL, error_message(status));
610 EXEC SQL UPDATE users SET status = 1 WHERE login = :login;
613 reply(rc, DONE, "INIT", "c", NULL, rc->username);
616 void QUIT(reg_client *rc, int argc, char **argv)
620 /* Register a user in Moira */
621 int register_user(int uid, char *username)
623 char uidbuf[10], *qargv[3], *motd = NULL;
626 status = mr_connect(hostname);
630 status = mr_motd(&motd);
637 status = krb_get_svc_in_tkt(REG_SVR_PRINCIPAL, REG_SVR_INSTANCE,
638 krb_realmofhost(hostname), MOIRA_SNAME,
639 shorthostname, 1, KEYFILE);
641 status += ERROR_TABLE_BASE_krb;
643 status = mr_auth("reg_svr");
646 com_err(whoami, status, "authenticating to moira");
651 sprintf(uidbuf, "%d", uid);
655 status = mr_query("register_user", 3, qargv, NULL, NULL);
661 /* Find some typical available usernames */
663 char *uname_patterns[] = {
665 "fmllllll", /* jmdoe... (last name truncated) */
666 "flllllll", /* jdoe.... ("") */
667 "llllllll", /* doe..... ("") */
674 int num_patterns = sizeof(uname_patterns) / sizeof(char *);
676 char *find_usernames(char *first, char *middle, char *last)
678 EXEC SQL BEGIN DECLARE SECTION;
679 char username[2 * USERS_LOGIN_SIZE];
681 EXEC SQL END DECLARE SECTION;
683 char *pp, *up, *fp, *mp, *lp, *unames = NULL;
689 for (pat = 0; pat < num_patterns; pat++)
695 for (pp = uname_patterns[pat]; *pp; pp++)
705 if (up - username + strlen(first) < USERS_LOGIN_SIZE)
706 up += sprintf(up, "%s", first);
724 if (up - username + strlen(last) < USERS_LOGIN_SIZE)
725 up += sprintf(up, "%s", last);
733 if (strlen(username) < 3 || strlen(username) >= USERS_LOGIN_SIZE)
736 EXEC SQL SELECT COUNT(login) INTO :count FROM users
737 WHERE login = :username;
745 EXEC SQL SELECT COUNT(name) INTO :count FROM list
746 WHERE name = :username;
755 EXEC SQL SELECT COUNT(label) INTO :count FROM filesys
756 WHERE label = :username;
768 unames = realloc(unames, strlen(unames) + strlen(username) + 3);
771 strcat(unames, ", ");
772 strcat(unames, username);
776 unames = strdup(username);
786 /* unames will be NULL if we couldn't suggest a username. Clear
787 errno so the caller can distinguish this from an error case. */
792 void fixname(char *name)
796 for (s = d = name; *s; s++)
804 void *xmalloc(size_t bytes)
806 void *buf = malloc(bytes);
811 com_err(whoami, errno, "in xmalloc");
815 void *xrealloc(void *ptr, size_t bytes)
817 void *buf = realloc(ptr, bytes);
822 com_err(whoami, errno, "in xrealloc");
826 char *xstrdup(char *str)
828 char *buf = strdup(str);
833 com_err(whoami, errno, "in xstrdup");
837 void mr_com_err(const char *whoami, long code, const char *fmt, va_list pvar)
841 fputs(whoami, stderr);
843 fprintf(stderr, "[#%d]", cl->clientid);
847 fputs(error_message(code), stderr);
851 vfprintf(stderr, fmt, pvar);
855 void sigshut(int sig)