6 * Copyright (C) 1987 by the Massachusetts Institute of Technology
8 * Server for user registration with SMS and Kerberos.
10 * This program is a client of the SMS server and the Kerberos
11 * admin_server, and is a server for the userreg program.
14 * Revision 1.6 1987-09-21 15:19:11 wesommer
15 * Allow numbers, _, and . as legal characters in the username.
17 * Revision 1.5 87/09/10 22:18:32 wesommer
18 * Clean up output format.
20 * Revision 1.4 87/09/04 23:33:19 wesommer
21 * Deleted test scaffolding (second oops.)
23 * Revision 1.3 87/09/03 03:05:18 wesommer
24 * Version used for userreg tests.
26 * Revision 1.2 87/08/22 18:39:45 wesommer
27 * User registration server.
29 * Revision 1.1 87/07/31 15:48:13 wesommer
35 static char *rcsid_reg_svr_c = "$Header$";
39 #include <sys/types.h>
41 #include <sys/socket.h>
42 #include <netinet/in.h>
48 #include "ureg_proto.h"
49 #include "../../include/sms.h"
50 #include "admin_server.h"
51 #include "admin_err.h"
55 extern char *strdup();
56 extern char *malloc();
57 extern int krb_err_base;
58 extern char admin_errmsg[];
71 static char retval[BUFSIZ];
75 struct sockaddr_in sin;
92 sp = getservbyname("sms_ureg", "udp");
94 fprintf(stderr, "Unknown service sms_ureg/udp\n");
97 s = socket(AF_INET, SOCK_DGRAM, 0);
102 bzero((char *)&sin, sizeof(sin));
104 sin.sin_family = AF_INET;
105 sin.sin_port = sp->s_port;
106 sin.sin_addr.s_addr = INADDR_ANY;
108 if (bind(s, &sin, sizeof(sin)) < 0) {
113 status = sms_connect();
115 com_err("reg_svr", status, " on connect");
120 com_err("reg_svr", status, " on auth");
125 com_err("reg_svr", 0, "Ready for next request");
126 addrlen = sizeof(sin);
127 bzero(retval, BUFSIZ);
128 len = recvfrom(s, buf, BUFSIZ, 0, &sin, &addrlen);
131 if (errno == EINTR) continue;
135 /* Parse a request packet */
136 status = parse_pkt(buf, len, &seqno, &message);
139 format_pkt(buf, &len, seqno, status, (char *)NULL);
140 (void) sendto(s, buf, len, 0, &sin, addrlen);
144 switch((int)message.request) {
145 case UREG_VERIFY_USER:
146 status = verify_user(&message);
148 case UREG_RESERVE_LOGIN:
149 status = reserve_user(&message);
151 case UREG_SET_PASSWORD:
152 status = set_password(&message);
156 status = UREG_UNKNOWN_REQUEST;
160 format_pkt(buf, &len, seqno, status, retval);
162 sendto(s, buf, len, 0, &sin, addrlen);
173 #define min(a,b) ((a)>(b)?(b):(a))
175 int validate_idno(message, db_mit_id, first, last)
182 static char decrypt[BUFSIZ];
184 static char hashid[14];
185 char idnumber[BUFSIZ];
192 string_to_key(db_mit_id, key);
193 key_sched(key, sched);
194 pcbc_encrypt(message->sealed, decrypt, message->sealed_len, sched, key, 0);
196 (void) strncpy(idnumber, decrypt, message->sealed_len);
197 temp = decrypt + strlen(idnumber) + 1;
198 len = message->sealed_len - (temp - decrypt);
200 (void) strncpy(hashid, temp, min(len, 14));
201 temp += strlen(hashid) + 1;
202 len = message->sealed_len - (temp - decrypt);
204 if (strcmp(hashid, db_mit_id)) return 1;
205 encrypt_mitid(recrypt, idnumber, first, last);
206 if (strcmp(recrypt, db_mit_id)) return 1;
214 static int status_in_db;
216 vfy_callbk(argc, argv, p_message)
217 int argc; /* Should sanity check this.. */
221 struct msg *message = (struct msg *)p_message;
223 char *firstname, *lastname;
226 if (got_one) return 0;
233 status = validate_idno(message, db_mit_id, firstname, lastname);
234 if (status) return 0; /* Nope; decryption failed */
236 status_in_db = atoi(argv[7]);
237 reg_status = status_in_db;
239 if (status_in_db != 0) {
240 (void) strcpy(retval, argv[0]);
242 user_id = atoi(argv[1]);
247 encrypt_mitid(buf, idnumber, first, last)
248 char *buf, *idnumber, *first, *last;
251 extern char *crypt();
253 #define _tolower(c) ((c)|0x60)
255 salt[0] = _tolower(last[0]);
256 salt[1] = _tolower(first[0]);
259 (void) strcpy(buf, crypt(&idnumber[2], salt));
262 int verify_user(message)
269 com_err("reg_svr", 0, " verify_user %s %s\n",
270 message->first, message->last);
271 argv[0] = "get_user_by_first_and_last";
272 argv[1] = message->first;
273 argv[2] = message->last;
276 status = sms_query_internal(3, argv, vfy_callbk, (char *)message);
278 if (status == SMS_NO_MATCH) status = UREG_USER_NOT_FOUND;
279 if (!got_one && !status)
280 status = UREG_USER_NOT_FOUND;
282 if (status != 0) goto punt;
284 if (reg_status == 1) status = UREG_ALREADY_REGISTERED;
285 if (reg_status == 2) status = UREG_NO_PASSWD_YET;
291 reserve_user(message)
300 com_err("reg_svr", 0, " reserve_user %s %s\n",
301 message->first, message->last);
303 argv[0] = "gufl"; /* get_user_by_first_and_last */
304 argv[1] = message->first;
305 argv[2] = message->last;
308 status = sms_query_internal(3, argv, vfy_callbk, (char *)message);
310 if (status == SMS_NO_MATCH) status = UREG_USER_NOT_FOUND;
311 if (!got_one && !status)
312 status = UREG_USER_NOT_FOUND;
314 if (status != 0) goto punt;
315 if (reg_status != 0) {
316 status = UREG_ALREADY_REGISTERED;
320 * He's made it past this phase already.
322 if (status_in_db == 2) {
327 for (i = 0; i < reg_misc_len && reg_misc[i]; i++) {
328 if (!islower(reg_misc[i]) && !isdigit(reg_misc[i]) &&
329 reg_misc[i] != '_' && reg_misc[i] != '.') {
330 status = UREG_INVALID_UNAME;
334 if (i < 3 || i > 8) {
335 status = UREG_INVALID_UNAME;
340 /* Send request to kerberos admin_server for login name */
342 status = get_svc_in_tkt("register", "sms", "ATHENA.MIT.EDU",
343 "changepw", "kerberos",
346 status += krb_err_base;
350 /* send set password request to kerberos admin_server */
351 (void) sprintf(uid_buf, "%013d", user_id); /* 13 chars of placebo */
352 /* for backwards-compat. */
354 status = admin_call(ADMIN_ADD_NEW_KEY_ATTR, login, "",
358 if (status == ADMIN_SERVER_ERROR) {
359 printf("Server error: %s\n", admin_errmsg);
361 if (strcmp(admin_errmsg,
362 "Principal already in kerberos database.") ==0)
363 status = UREG_LOGIN_USED;
372 status = set_login(login, mit_id);
376 com_err("set_login", status, 0);
379 /* choose post office */
381 status = choose_pobox(login);
383 com_err("choose_pobox", status, 0);
388 status = create_group(login);
389 if (status == SMS_LIST) status = UREG_LOGIN_USED;
392 com_err("create_group", status, 0);
395 /* set quota entry, create filsys */
397 status = alloc_filsys(login, SMS_FS_STUDENT, 0, 0);
398 if (status == SMS_FILESYS_EXISTS) status = UREG_LOGIN_USED;
400 com_err("alloc_filsys", status, 0);
403 /* set filsys and status in SMS database */
405 status = set_status_filsys(reg_misc, mit_id);
407 com_err("set_filsys", status, 0);
413 com_err("reg_svr", status, " returned from reserve_user");
417 set_password(message)
424 com_err("reg_svr", 0, " set_password %s %s\n",
425 message->first, message->last);
427 /* validate that user is who he claims to be */
429 argv[0] = "get_user_by_first_and_last";
430 argv[1] = message->first;
431 argv[2] = message->last;
434 status = sms_query_internal(3, argv, vfy_callbk, (char *)message);
436 if (status == SMS_NO_MATCH) status = UREG_USER_NOT_FOUND;
437 if (!got_one && !status)
438 status = UREG_USER_NOT_FOUND;
440 if (status != 0) goto punt;
442 /* validate that state is equal to '2' (login, but no password) */
444 if (reg_status != 2) {
445 status = UREG_NO_LOGIN_YET;
450 status = get_svc_in_tkt("register", "sms", "ATHENA.MIT.EDU",
451 "changepw", "kerberos",
454 status += krb_err_base;
458 (void) sprintf(uid_buf, "%013d", user_id); /* 13 chars of placebo */
459 /* for backwards-compat. */
460 /* send set password request to kerberos admin_server */
461 status = admin_call(ADMIN_ADD_NEW_KEY_ATTR, retval, "",
464 if (status) goto punt;
467 status = set_final_status(retval, mit_id);
469 /* reflect reply to client */
475 parse_pkt(buf, len, seqnop, messagep)
479 struct msg *messagep;
481 if (len < 4) return UREG_BROKEN_PACKET;
482 bcopy(buf, (char *)&messagep->version, sizeof(long));
483 messagep->version = ntohl(messagep->version);
484 if (messagep->version != 1) return UREG_WRONG_VERSION;
489 if (len < 4) return UREG_BROKEN_PACKET;
490 bcopy(buf, (char *)seqnop, sizeof(long));
495 if (len < 4) return UREG_BROKEN_PACKET;
496 bcopy(buf, (char *)(&messagep->request), sizeof(long));
497 messagep->request = ntohl(messagep->request);
501 messagep->first = buf;
503 for (; *buf && len > 0; --len, ++buf) continue;
504 if (len <= 0) return UREG_BROKEN_PACKET;
508 messagep->last = buf;
510 for (; *buf && len > 0; --len, ++buf) continue;
511 if (len <= 0) return UREG_BROKEN_PACKET;
515 if (len <= 0) return UREG_BROKEN_PACKET;
517 messagep->sealed = buf;
518 messagep->sealed_len = len;
523 format_pkt(buf, lenp, seqno, status, message)
530 u_long vers = htonl((u_long)1);
531 status = htonl((u_long)status);
533 bcopy((char *)&vers, buf, sizeof(long));
534 bcopy((char *)&seqno, buf+sizeof(long), sizeof(long));
535 bcopy((char *)&status, buf+ 2*sizeof(long), sizeof(long));
536 *lenp = sizeof(long) * 3;
537 (void) strcpy(buf+3*sizeof(long), message);
538 (*lenp) += strlen(message);
541 store_user(argc, argv, argp)
546 char **retv = (char **) argp;
549 for (i = 0; i < argc; i++) {
554 retv[i] = strdup(argv[i]);
561 * Set login name of user with "idnumber" to be "username"
564 set_login(username, idnumber)
572 argv[0] = "get_user_by_mitid";
575 for (i=0; i<13; i++) {
579 status = sms_query_internal(2, argv, store_user, (char *)(retv+1));
580 if (status) return status;
584 if (retv[4]) free(retv[4]);
585 retv[4] = "null"; /* No such filesystem */
587 printf("Update_user(%s, %s)\n", retv[0], retv[1]);
589 status = sms_query("update_user", 12, retv, abort, 0);
593 for (i=1; i<12; i++) {
594 if (retv[i]) free(retv[i]);
602 * Set the status and filsys of user with username "uname" and filesys filsys.
605 set_status_filsys(username, idnumber)
613 argv[0] = "get_user_by_mitid";
616 for (i=0; i<13; i++) {
620 status = sms_query_internal(2, argv, store_user, (char *)(retv+1));
621 if (status) return status;
631 printf("Update_user(%s, %s)\n", retv[0], retv[1]);
633 status = sms_query("update_user", 12, retv, abort, 0);
636 for (i=1; i<12; i++) {
637 if (retv[i]) free(retv[i]);
643 * Set the status and filsys of user with username "uname" and filesys filsys.
646 set_final_status(username, idnumber)
654 argv[0] = "get_user_by_mitid";
657 for (i=0; i<13; i++) {
661 status = sms_query_internal(2, argv, store_user, (char *)(retv+1));
662 if (status) return status;
669 printf("Update_user(%s, %s)\n", retv[0], retv[1]);
671 status = sms_query("update_user", 12, retv, abort, 0);
673 for (i=1; i<12; i++) {
674 if (retv[i]) free(retv[i]);
684 static char *cr[] = {
691 return sms_query_internal(2, cr, abort, 0);
697 * c-continued-statement-offset: 4
699 * c-argdecl-indent: 4