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)
163 state == RS_SLEEPING;
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)
412 com_err(whoami, errno, "in RIFO");
413 reply(rc, INTERNAL_ERROR, "INIT", "c", NULL, "Out of memory");
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, fullname, class,
427 void SWRD(reg_client *rc, int argc, char **argv)
432 if (!rc->id || argc != 6)
434 reply(rc, PROTOCOL_ERROR, "INIT", "c", NULL);
438 getwordlist(rc->id, words);
439 for (i = 0; i < 6; i++)
441 if (strcasecmp(strtrim(argv[i]), words[i]))
446 reply(rc, BAD_SIX_WORDS, "GETW", "d", NULL);
453 reply(rc, NO_MESSAGE, "GETL", "c", rc->suggestions);
455 reply(rc, FORCED_USERNAME, "GETP", "c", NULL, rc->username);
458 void LOGN(reg_client *rc, int argc, char **argv)
464 if (!rc->uid || rc->id || rc->username || argc != 1)
466 reply(rc, PROTOCOL_ERROR, "INIT", "c", NULL);
472 /* make sure someone's not trying to overrun reply */
473 if (strlen(login) > 100)
475 com_err(whoami, 0, "Buffer overrun attempted? Closing connection");
480 if ((strlen(login) < 3) || (strlen(login) > USERS_LOGIN_SIZE - 1) ||
481 (login[0] == '_') || isdigit(login[0]))
483 reply(rc, BAD_USERNAME, "GETL", "c", rc->suggestions, login,
484 3, USERS_LOGIN_SIZE - 1);
488 for (i = 0; i < strlen(login); i++)
490 if (!islower(login[i]) && !isdigit(login[i]) && (login[i] != '_'))
492 reply(rc, BAD_USERNAME, "GETL", "c", rc->suggestions, login,
493 3, USERS_LOGIN_SIZE - 1);
498 status = check_kerberos(login);
499 if (status == MR_SUCCESS)
500 status = register_user(rc->uid, login);
502 if (status == MR_IN_USE)
504 if (rc->reserved_username)
506 reply(rc, RESERVED_USERNAME_UNAVAILABLE, "INIT", "c", NULL,
510 reply(rc, USERNAME_UNAVAILABLE, "GETL", "c", rc->suggestions);
513 else if (status == MR_DOWN)
515 reply(rc, DATABASE_CLOSED, "INIT", "c", NULL);
518 else if (status != MR_SUCCESS)
520 reply(rc, INTERNAL_ERROR, "INIT", "c", NULL, error_message(status));
524 rc->username = strdup(login);
527 com_err(whoami, errno, "in LOGN");
528 reply(rc, INTERNAL_ERROR, "INIT", "c", NULL, "Out of memory");
531 reply(rc, USERNAME_OK, "GETP", "c", NULL, login);
535 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* ^@ - ^O */
536 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* ^P - ^_ */
537 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* SPACE - / */
538 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, /* 0 - ? */
539 2, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, /* : - O */
540 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, /* P - _ */
541 2, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, /* ` - o */
542 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 0, /* p - ^? */
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,
550 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
553 void PSWD(reg_client *rc, int argc, char **argv)
556 char *password = argv[0], *p;
557 EXEC SQL BEGIN DECLARE SECTION;
558 char *login = rc->username;
559 EXEC SQL END DECLARE SECTION;
561 if (!rc->username || rc->id || argc != 1)
563 reply(rc, PROTOCOL_ERROR, "INIT", "c", NULL);
567 /* password quality checking */
568 if (strlen(password) < 4)
570 reply(rc, PASSWORD_SHORT, "GETP", "c", NULL);
574 if (strlen(password) < 7)
576 for (p = password + 1; *p; p++)
578 if (ctypes[*p] != ctypes[*(p - 1)])
583 reply(rc, PASSWORD_SIMPLE, "GETP", "c", NULL);
588 if (!strcasecmp(password, "GykoR-66") ||
589 !strcasecmp(password, "slaRooBey") ||
590 !strcasecmp(password, "krang-its") ||
591 !strcasecmp(password, "2HotPeetzas") ||
592 !strcasecmp(password, "ItzAGurl"))
594 reply(rc, PASSWORD_SAMPLE, "GETP", "c", NULL);
598 status = register_kerberos(rc->username, password);
599 if (status == MR_IN_USE)
601 reply(rc, RESERVED_USERNAME_UNAVAILABLE, "INIT", "c", NULL,
607 com_err(whoami, status, "registering username with Kerberos");
608 reply(rc, KADM_ERROR, "INIT", "c", NULL, error_message(status));
611 EXEC SQL UPDATE users SET status = 1 WHERE login = :login;
614 reply(rc, DONE, "INIT", "c", NULL, rc->username);
617 void QUIT(reg_client *rc, int argc, char **argv)
621 /* Register a user in Moira */
622 int register_user(int uid, char *username)
624 char uidbuf[10], *qargv[3], *motd = NULL;
627 status = mr_connect(hostname);
631 status = mr_motd(&motd);
638 status = krb_get_svc_in_tkt(REG_SVR_PRINCIPAL, REG_SVR_INSTANCE,
639 krb_realmofhost(hostname), MOIRA_SNAME,
640 shorthostname, 1, KEYFILE);
642 status += ERROR_TABLE_BASE_krb;
644 status = mr_auth("reg_svr");
647 com_err(whoami, status, "authenticating to moira");
652 sprintf(uidbuf, "%d", uid);
656 status = mr_query("register_user", 3, qargv, NULL, NULL);
662 /* Find some typical available usernames */
664 char *uname_patterns[] = {
666 "fmllllll", /* jmdoe... (last name truncated) */
667 "flllllll", /* jdoe.... ("") */
668 "llllllll", /* doe..... ("") */
675 int num_patterns = sizeof(uname_patterns) / sizeof(char *);
677 char *find_usernames(char *first, char *middle, char *last)
679 EXEC SQL BEGIN DECLARE SECTION;
680 char username[2 * USERS_LOGIN_SIZE];
682 EXEC SQL END DECLARE SECTION;
684 char *pp, *up, *fp, *mp, *lp, *unames = NULL;
690 for (pat = 0; pat < num_patterns; pat++)
696 for (pp = uname_patterns[pat]; *pp; pp++)
706 if (up - username + strlen(first) < USERS_LOGIN_SIZE)
707 up += sprintf(up, "%s", first);
725 if (up - username + strlen(last) < USERS_LOGIN_SIZE)
726 up += sprintf(up, "%s", last);
734 if (strlen(username) < 3 || strlen(username) >= USERS_LOGIN_SIZE)
737 EXEC SQL SELECT COUNT(login) INTO :count FROM users
738 WHERE login = :username;
743 EXEC SQL SELECT COUNT(name) INTO :count FROM list
744 WHERE name = :username;
750 EXEC SQL SELECT COUNT(label) INTO :count FROM filesys
751 WHERE label = :username;
760 unames = realloc(unames, strlen(unames) + strlen(username) + 3);
763 strcat(unames, ", ");
764 strcat(unames, username);
768 unames = strdup(username);
781 void fixname(char *name)
785 for (s = d = name; *s; s++)
793 void *xmalloc(size_t bytes)
795 void *buf = malloc(bytes);
800 com_err(whoami, errno, "in xmalloc");
804 void *xrealloc(void *ptr, size_t bytes)
806 void *buf = realloc(ptr, bytes);
811 com_err(whoami, errno, "in xrealloc");
815 char *xstrdup(char *str)
817 char *buf = strdup(str);
822 com_err(whoami, errno, "in xstrdup");
826 void mr_com_err(const char *whoami, long code, const char *fmt, va_list pvar)
830 fputs(whoami, stderr);
832 fprintf(stderr, "[#%d]", cl->clientid);
836 fputs(error_message(code), stderr);
840 vfprintf(stderr, fmt, pvar);
844 void sigshut(int sig)