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], pin[USERS_PIN_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, pin, 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, :pin, :first, :middle, :last, :class;
337 /* Check names, allowing for the possibility that Moira and the
338 user might have them split up differently. eg, Mary/Ann/Singleton
339 vs. Mary Ann/Singleton. */
340 if (strcasecmp(last, ulast) && strncasecmp(last, ulast, strlen(last)) &&
341 strncasecmp(last, ulast, strlen(ulast)))
343 if (strlen(last) > 3 && strlen(ulast) < 3)
345 if (strcasecmp(first, ufirst) &&
346 strncasecmp(first, ufirst, strlen(first)) &&
347 strncasecmp(first, ufirst, strlen(ufirst)))
349 if (strlen(first) > 3 && strlen(ufirst) < 3)
351 /* Ignore the middle name since Moira doesn't have those reliably */
354 sqlstatus = sqlca.sqlcode;
355 EXEC SQL CLOSE csr_id;
359 reply(rc, NOT_FOUND_IN_DATABASE, "GETN", "d", NULL);
367 case US_ENROLL_NOT_ALLOWED:
368 case US_REGISTERED_KERBEROS_ONLY:
369 reply(rc, ALREADY_REGISTERED, "INIT", "c", NULL, login);
373 reply(rc, ACCOUNT_DELETED, "INIT", "c", NULL, login);
377 reply(rc, NOT_ELIGIBLE, "INIT", "c", NULL);
384 rc->user_status = status;
386 sprintf(fullname, "%s %s%s%s", first, middle, *middle ? " " : "", last);
387 if (!strcmp(class, "MITS"))
388 strcpy(class, "STAFF");
394 com_err(whoami, errno, "in RIFO");
395 reply(rc, INTERNAL_ERROR, "INIT", "c", NULL, "Out of memory");
401 rc->reserved_username = 1;
402 rc->username = strdup(login);
405 com_err(whoami, errno, "in RIFO");
406 reply(rc, INTERNAL_ERROR, "INIT", "c", NULL, "Out of memory");
412 rc->suggestions = find_usernames(first, middle, last);
413 if (!rc->suggestions && errno)
415 com_err(whoami, errno, "in RIFO");
416 reply(rc, INTERNAL_ERROR, "INIT", "c", NULL, error_message(errno));
424 reply(rc, FOUND, "GETI", "c", NULL, fullname, class);
426 reply(rc, FOUND, "GETW", "c", NULL, fullname, class);
428 else if (!rc->username)
429 reply(rc, FOUND, "GETL", "c", rc->suggestions, fullname, class);
432 if (rc->user_status == US_NO_LOGIN_YET ||
433 rc->user_status == US_NO_LOGIN_YET_KERBEROS_ONLY)
435 status = check_kerberos(login);
436 if (status == MR_SUCCESS &&
437 rc->user_status != US_NO_LOGIN_YET_KERBEROS_ONLY)
438 status = register_user(rc->uid, login);
439 if (status == MR_IN_USE)
441 reply(rc, RESERVED_USERNAME_UNAVAILABLE, "INIT", "c", NULL,
445 else if (status == MR_DOWN)
447 reply(rc, DATABASE_CLOSED, "INIT", "c", NULL);
450 else if (status != MR_SUCCESS)
452 reply(rc, INTERNAL_ERROR, "INIT", "c", NULL,
453 error_message(status));
457 reply(rc, FORCED_USERNAME, "GETP", "c", NULL, rc->username);
461 void SWRD(reg_client *rc, int argc, char **argv)
466 if (!rc->id || argc != 6)
468 reply(rc, PROTOCOL_ERROR, "INIT", "c", NULL);
472 getwordlist(rc->id, words);
473 for (i = 0; i < 6; i++)
475 if (strcasecmp(strtrim(argv[i]), words[i]))
480 reply(rc, BAD_SIX_WORDS, "GETW", "d", NULL);
487 reply(rc, NO_MESSAGE, "GETL", "c", rc->suggestions);
489 reply(rc, FORCED_USERNAME, "GETP", "c", NULL, rc->username);
492 void SPIN(reg_client *rc, int argc, char **argv)
494 EXEC SQL BEGIN DECLARE SECTION;
495 char pin[USERS_PIN_SIZE];
496 EXEC SQL END DECLARE SECTION;
498 if (!rc->id || argc != 1)
500 reply(rc, PROTOCOL_ERROR, "INIT", "c", NULL);
504 EXEC SQL SELECT pin INTO :pin FROM users WHERE clearid = :rc->id;
506 if (strcmp(argv[0], pin) != 0)
508 reply(rc, BAD_PIN, "GETI", "d", NULL);
515 reply(rc, NO_MESSAGE, "GETL", "c", rc->suggestions);
517 reply(rc, FORCED_USERNAME, "GETP", "c", NULL, rc->username);
520 void LOGN(reg_client *rc, int argc, char **argv)
526 if (!rc->uid || rc->id || rc->username || argc != 1)
528 reply(rc, PROTOCOL_ERROR, "INIT", "c", NULL);
534 /* make sure someone's not trying to overrun reply */
535 if (strlen(login) > 100)
537 com_err(whoami, 0, "Buffer overrun attempted? Closing connection");
542 if ((strlen(login) < 3) || (strlen(login) > USERS_LOGIN_SIZE - 1) ||
543 (login[0] == '_') || isdigit(login[0]))
545 reply(rc, BAD_USERNAME, "GETL", "c", rc->suggestions, login,
546 3, USERS_LOGIN_SIZE - 1);
550 for (i = 0; i < strlen(login); i++)
552 if (!islower(login[i]) && !isdigit(login[i]) && (login[i] != '_'))
554 reply(rc, BAD_USERNAME, "GETL", "c", rc->suggestions, login,
555 3, USERS_LOGIN_SIZE - 1);
560 status = check_kerberos(login);
561 if (status == MR_SUCCESS)
563 if (rc->user_status == US_NO_LOGIN_YET_KERBEROS_ONLY)
564 EXEC SQL UPDATE users SET login = :login WHERE unix_uid = :rc->uid;
566 status = register_user(rc->uid, login);
568 if (status == MR_IN_USE)
570 if (rc->reserved_username)
572 reply(rc, RESERVED_USERNAME_UNAVAILABLE, "INIT", "c", NULL,
576 reply(rc, USERNAME_UNAVAILABLE, "GETL", "c", rc->suggestions);
579 else if (status == MR_DOWN)
581 reply(rc, DATABASE_CLOSED, "INIT", "c", NULL);
584 else if (status != MR_SUCCESS)
586 reply(rc, INTERNAL_ERROR, "INIT", "c", NULL, error_message(status));
590 rc->username = strdup(login);
593 com_err(whoami, errno, "in LOGN");
594 reply(rc, INTERNAL_ERROR, "INIT", "c", NULL, "Out of memory");
597 reply(rc, USERNAME_OK, "GETP", "c", NULL, login);
601 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* ^@ - ^O */
602 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* ^P - ^_ */
603 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* SPACE - / */
604 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, /* 0 - ? */
605 2, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, /* : - O */
606 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, /* P - _ */
607 2, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, /* ` - o */
608 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 0, /* p - ^? */
609 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
610 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
611 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
612 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
613 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
614 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
615 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
616 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
619 void PSWD(reg_client *rc, int argc, char **argv)
622 char *password = argv[0], *p;
623 EXEC SQL BEGIN DECLARE SECTION;
624 char *login = rc->username;
625 EXEC SQL END DECLARE SECTION;
627 if (!rc->username || rc->id || argc != 1)
629 reply(rc, PROTOCOL_ERROR, "INIT", "c", NULL);
633 /* password quality checking */
634 if (strlen(password) < 4)
636 reply(rc, PASSWORD_SHORT, "GETP", "c", NULL);
640 if (strlen(password) < 7)
642 for (p = password + 1; *p; p++)
644 if (ctypes[*p] != ctypes[*(p - 1)])
649 reply(rc, PASSWORD_SIMPLE, "GETP", "c", NULL);
654 if (!strcasecmp(password, "GykoR-66") ||
655 !strcasecmp(password, "slaRooBey") ||
656 !strcasecmp(password, "krang-its") ||
657 !strcasecmp(password, "2HotPeetzas") ||
658 !strcasecmp(password, "ItzAGurl"))
660 reply(rc, PASSWORD_SAMPLE, "GETP", "c", NULL);
664 status = register_kerberos(rc->username, password);
665 if (status == MR_QUALITY)
667 reply(rc, PASSWORD_SIMPLE, "GETP", "c", NULL);
670 else if (status == MR_IN_USE)
672 reply(rc, RESERVED_USERNAME_UNAVAILABLE, "INIT", "c", NULL,
678 com_err(whoami, status, "registering username with Kerberos");
679 reply(rc, KADM_ERROR, "INIT", "c", NULL, error_message(status));
683 if (rc->user_status == US_NO_LOGIN_YET_KERBEROS_ONLY)
684 EXEC SQL UPDATE users SET status = 9 WHERE login = :login;
686 EXEC SQL UPDATE users SET status = 1 WHERE login = :login;
689 reply(rc, DONE, "INIT", "c", NULL, rc->username);
692 void QUIT(reg_client *rc, int argc, char **argv)
696 /* Register a user in Moira */
697 int register_user(int uid, char *username)
699 char uidbuf[10], *qargv[3], *motd = NULL;
702 status = mr_connect(hostname);
706 status = mr_motd(&motd);
713 status = krb_get_svc_in_tkt(REG_SVR_PRINCIPAL, REG_SVR_INSTANCE,
714 krb_realmofhost(hostname), MOIRA_SNAME,
715 shorthostname, 1, KEYFILE);
717 status += ERROR_TABLE_BASE_krb;
719 status = mr_auth("reg_svr");
722 com_err(whoami, status, "authenticating to moira");
727 sprintf(uidbuf, "%d", uid);
731 status = mr_query("register_user", 3, qargv, NULL, NULL);
737 /* Find some typical available usernames */
739 char *uname_patterns[] = {
741 "fmllllll", /* jmdoe... (last name truncated) */
742 "flllllll", /* jdoe.... ("") */
743 "llllllll", /* doe..... ("") */
750 int num_patterns = sizeof(uname_patterns) / sizeof(char *);
752 char *find_usernames(char *first, char *middle, char *last)
754 EXEC SQL BEGIN DECLARE SECTION;
755 char username[2 * USERS_LOGIN_SIZE];
757 EXEC SQL END DECLARE SECTION;
759 char *pp, *up, *fp, *mp, *lp, *unames = NULL;
765 for (pat = 0; pat < num_patterns; pat++)
771 for (pp = uname_patterns[pat]; *pp; pp++)
781 if (up - username + strlen(first) < USERS_LOGIN_SIZE)
782 up += sprintf(up, "%s", first);
800 if (up - username + strlen(last) < USERS_LOGIN_SIZE)
801 up += sprintf(up, "%s", last);
809 if (strlen(username) < 3 || strlen(username) >= USERS_LOGIN_SIZE)
812 EXEC SQL SELECT COUNT(login) INTO :count FROM users
813 WHERE login = :username;
821 EXEC SQL SELECT COUNT(name) INTO :count FROM list
822 WHERE name = :username;
831 EXEC SQL SELECT COUNT(label) INTO :count FROM filesys
832 WHERE label = :username;
844 unames = realloc(unames, strlen(unames) + strlen(username) + 3);
847 strcat(unames, ", ");
848 strcat(unames, username);
852 unames = strdup(username);
862 /* unames will be NULL if we couldn't suggest a username. Clear
863 errno so the caller can distinguish this from an error case. */
868 void fixname(char *name)
872 for (s = d = name; *s; s++)
880 void *xmalloc(size_t bytes)
882 void *buf = malloc(bytes);
887 com_err(whoami, errno, "in xmalloc");
891 void *xrealloc(void *ptr, size_t bytes)
893 void *buf = realloc(ptr, bytes);
898 com_err(whoami, errno, "in xrealloc");
902 char *xstrdup(char *str)
904 char *buf = strdup(str);
909 com_err(whoami, errno, "in xstrdup");
913 void mr_com_err(const char *whoami, long code, const char *fmt, va_list pvar)
917 fputs(whoami, stderr);
919 fprintf(stderr, "[#%d]", cl->clientid);
923 fputs(error_message(code), stderr);
927 vfprintf(stderr, fmt, pvar);
931 void sigshut(int sig)