2 * $Id: auth.c,v 1.42 2003-03-12 15:07:02 didg Exp $
4 * Copyright (c) 1990,1993 Regents of The University of Michigan.
5 * All Rights Reserved. See COPYRIGHT.
10 #endif /* HAVE_CONFIG_H */
17 #endif /* HAVE_UNISTD_H */
18 #include <sys/types.h>
19 #include <sys/param.h>
21 #include <netatalk/endian.h>
22 #include <atalk/afp.h>
23 #include <atalk/compat.h>
24 #include <atalk/util.h>
35 #include <atalk/logger.h>
39 #include <arpa/inet.h>
43 extern void afp_get_cmdline( int *ac, char ***av );
55 static int afp_version_index;
58 #if defined( __svr4__ ) && !defined( NGROUPS )
59 #define NGROUPS NGROUPS_MAX
60 #endif /* __svr4__ NGROUPS */
61 #if defined( sun ) && !defined( __svr4__ ) || defined( ultrix )
62 int groups[ NGROUPS ];
63 #else /* sun __svr4__ ultrix */
64 #if defined( __svr4__ ) && !defined( NGROUPS )
65 #define NGROUPS NGROUPS_MAX
66 #endif /* __svr4__ NGROUPS */
67 gid_t groups[ NGROUPS ];
68 #endif /* sun ultrix */
72 * These numbers are scattered throughout the code.
74 static struct afp_versions afp_versions[] = {
75 { "AFPVersion 1.1", 11 },
76 { "AFPVersion 2.0", 20 },
77 { "AFPVersion 2.1", 21 },
85 static struct uam_mod uam_modules = {NULL, NULL, &uam_modules, &uam_modules};
86 static struct uam_obj uam_login = {"", "", 0, {{NULL}}, &uam_login,
88 static struct uam_obj uam_changepw = {"", "", 0, {{NULL}}, &uam_changepw,
91 static struct uam_obj *afp_uam = NULL;
94 void status_versions( data )
101 memcpy(&status, start + AFPSTATUS_VERSOFF, sizeof(status));
102 num = sizeof( afp_versions ) / sizeof( afp_versions[ 0 ] );
103 data += ntohs( status );
105 for ( i = 0; i < num; i++ ) {
106 len = strlen( afp_versions[ i ].av_name );
108 memcpy( data, afp_versions[ i ].av_name , len );
111 status = htons( data - start );
112 memcpy(start + AFPSTATUS_UAMSOFF, &status, sizeof(status));
115 void status_uams(char *data, const char *authlist)
119 struct uam_obj *uams;
122 memcpy(&status, start + AFPSTATUS_UAMSOFF, sizeof(status));
124 while ((uams = uams->uam_prev) != &uam_login) {
125 if (strstr(authlist, uams->uam_path))
129 data += ntohs( status );
131 while ((uams = uams->uam_prev) != &uam_login) {
132 if (strstr(authlist, uams->uam_path)) {
133 LOG(log_info, logtype_afpd, "uam: \"%s\" available", uams->uam_name);
134 len = strlen( uams->uam_name);
136 memcpy( data, uams->uam_name, len );
142 status = htons(data - start);
143 memcpy(start + AFPSTATUS_ICONOFF, &status, sizeof(status));
146 /* handle errors by closing the connection. this is only needed
147 * by the afp_* functions. */
148 static int send_reply(const AFPObj *obj, const int err)
150 if ((err == AFP_OK) || (err == AFPERR_AUTHCONT))
153 obj->reply(obj->handle, err);
159 static int login(AFPObj *obj, struct passwd *pwd, void (*logout)(void))
163 #endif /* ADMIN_GRP */
165 /* UAM had syslog control; afpd needs to reassert itself */
166 set_processname("afpd");
167 syslog_setup(log_debug, logtype_default, logoption_ndelay|logoption_pid, logfacility_daemon);
169 if ( pwd->pw_uid == 0 ) { /* don't allow root login */
170 LOG(log_error, logtype_afpd, "login: root login denied!" );
171 return AFPERR_NOTAUTH;
174 LOG(log_info, logtype_afpd, "login %s (uid %d, gid %d) %s", pwd->pw_name,
175 pwd->pw_uid, pwd->pw_gid , afp_versions[afp_version_index].av_name);
177 if (obj->proto == AFPPROTO_ASP) {
178 ASP asp = obj->handle;
179 int addr_net = ntohs( asp->asp_sat.sat_addr.s_net );
180 int addr_node = asp->asp_sat.sat_addr.s_node;
182 if (obj->options.authprintdir) {
183 if(addr_net && addr_node) { /* Do we have a valid Appletalk address? */
186 int mypid = getpid();
187 struct stat stat_buf;
189 sprintf(nodename, "%s/net%d.%dnode%d", obj->options.authprintdir,
190 addr_net / 256, addr_net % 256, addr_node);
191 LOG(log_info, logtype_afpd, "registering %s (uid %d) on %u.%u as %s",
192 pwd->pw_name, pwd->pw_uid, addr_net, addr_node, nodename);
194 if (stat(nodename, &stat_buf) == 0) { /* file exists */
195 if (S_ISREG(stat_buf.st_mode)) { /* normal file */
197 fp = fopen(nodename, "w");
198 fprintf(fp, "%s:%d\n", pwd->pw_name, mypid);
200 chown( nodename, pwd->pw_uid, -1 );
201 } else { /* somebody is messing with us */
202 LOG(log_error, logtype_afpd, "print authfile %s is not a normal file, it will not be modified", nodename );
204 } else { /* file 'nodename' does not exist */
205 fp = fopen(nodename, "w");
206 fprintf(fp, "%s:%d\n", pwd->pw_name, mypid);
208 chown( nodename, pwd->pw_uid, -1 );
210 } /* if (addr_net && addr_node ) */
211 } /* if (options->authprintdir) */
212 } /* if (obj->proto == AFPPROTO_ASP) */
214 if (initgroups( pwd->pw_name, pwd->pw_gid ) < 0) {
216 LOG(log_info, logtype_afpd, "running with uid %d", geteuid());
217 #else /* RUN_AS_USER */
218 LOG(log_error, logtype_afpd, "login: %s", strerror(errno));
219 return AFPERR_BADUAM;
220 #endif /* RUN_AS_USER */
224 /* Basically if the user is in the admin group, we stay root */
226 if (( ngroups = getgroups( NGROUPS, groups )) < 0 ) {
227 LOG(log_error, logtype_afpd, "login: getgroups: %s", strerror(errno) );
228 return AFPERR_BADUAM;
232 LOG(log_info, logtype_afpd, "obj->options.admingid == %d", obj->options.admingid);
234 if (obj->options.admingid != 0) {
236 for (i = 0; i < ngroups; i++) {
237 if (groups[i] == obj->options.admingid) admin = 1;
242 LOG(log_info, logtype_afpd, "admin login -- %s", pwd->pw_name );
248 struct DSI *dsi = obj->handle;
255 afp_get_cmdline( &argc, &argv );
257 hp = gethostbyaddr( (char *) &dsi->client.sin_addr,
258 sizeof( struct in_addr ),
259 dsi->client.sin_family );
262 clientname = hp->h_name;
264 clientname = inet_ntoa( dsi->client.sin_addr );
266 sprintf( hostname, "%s@%s", pwd->pw_name, clientname );
268 if( sia_become_user( NULL, argc, argv, hostname, pwd->pw_name,
269 NULL, FALSE, NULL, NULL,
270 SIA_BEU_REALLOGIN ) != SIASUCCESS )
271 return AFPERR_BADUAM;
273 LOG(log_info, logtype_afpd, "session from %s (%s)", hostname,
274 inet_ntoa( dsi->client.sin_addr ) );
275 if (setegid( pwd->pw_gid ) < 0 || seteuid( pwd->pw_uid ) < 0) {
276 LOG(log_error, logtype_afpd, "login: %s", strerror(errno) );
277 return AFPERR_BADUAM;
282 if (setregid(pwd->pw_gid, pwd->pw_gid ) < 0 || setreuid(pwd->pw_uid,pwd->pw_uid ) < 0) {
284 if (setegid( pwd->pw_gid ) < 0 || seteuid( pwd->pw_uid ) < 0) {
285 LOG(log_error, logtype_afpd, "login: %s", strerror(errno) );
286 return AFPERR_BADUAM;
290 /* There's probably a better way to do this, but for now, we just
296 #endif /* ADMIN_GRP */
299 afp_switch = postauth_switch;
300 switch (afp_version) {
302 uam_afpserver_action(AFP_ENUMERATE_EXT2, UAM_AFPSERVER_POSTAUTH, afp_enumerate_ext2, NULL);
304 uam_afpserver_action(AFP_ENUMERATE_EXT, UAM_AFPSERVER_POSTAUTH, afp_enumerate_ext, NULL);
305 uam_afpserver_action(AFP_BYTELOCK_EXT, UAM_AFPSERVER_POSTAUTH, afp_bytelock_ext, NULL);
306 /* catsearch_ext uses the same packet as catsearch FIXME double check this, it wasn't true for enue
308 uam_afpserver_action(AFP_CATSEARCH_EXT, UAM_AFPSERVER_POSTAUTH, afp_catsearch, NULL);
309 uam_afpserver_action(AFP_GETSESSTOKEN, UAM_AFPSERVER_POSTAUTH, afp_getsession, NULL);
310 uam_afpserver_action(AFP_READ_EXT, UAM_AFPSERVER_POSTAUTH, afp_read_ext, NULL);
311 uam_afpserver_action(AFP_WRITE_EXT, UAM_AFPSERVER_POSTAUTH, afp_write_ext, NULL);
312 uam_afpserver_action(AFP_DISCTOLDSESS, UAM_AFPSERVER_POSTAUTH, afp_disconnect, NULL);
313 uam_afpserver_action(AFP_ZZZ, UAM_AFPSERVER_POSTAUTH, afp_zzz, NULL);
317 obj->logout = logout;
321 save_uidgid ( &obj->uidgid );
327 /* ---------------------- */
328 int afp_zzz (obj, ibuf, ibuflen, rbuf, rbuflen ) /* Function 122 */
331 unsigned int ibuflen, *rbuflen;
338 *rbuflen = sizeof(retdata);
339 retdata = htonl(retdata);
340 memcpy(rbuf, &retdata, sizeof(retdata));
341 if (obj->proto == AFPPROTO_DSI) {
342 DSI *dsi = obj->handle;
345 rbuf += sizeof(retdata);
349 /* ---------------------- */
350 int afp_getsession(obj, ibuf, ibuflen, rbuf, rbuflen )
353 unsigned int ibuflen, *rbuflen;
358 u_int16_t tklen; /* FIXME: spec u_int32_t? */
366 memcpy(&type, ibuf, sizeof(type));
368 ibuf += sizeof(type);
369 ibuflen -= sizeof(type);
374 case 0: /* old version ?*/
376 case 1: /* disconnect */
377 case 2: /* reconnect update id */
378 if (ibuflen >= sizeof(idlen)) {
379 memcpy(&idlen, ibuf, sizeof(idlen));
380 idlen = ntohl(idlen);
381 ibuf += sizeof(idlen);
382 ibuflen -= sizeof(idlen);
383 if (ibuflen < idlen) {
386 /* memcpy (id, ibuf, idlen) */
394 *rbuflen = sizeof(type);
396 memcpy(rbuf, &type, sizeof(type));
397 rbuf += sizeof(type);
399 *rbuflen += sizeof(tklen);
400 tklen = htons(sizeof(pid_t));
401 memcpy(rbuf, &tklen, sizeof(tklen));
402 rbuf += sizeof(tklen);
404 *rbuflen += sizeof(pid_t);
406 memcpy(rbuf, &token, sizeof(pid_t));
410 /* ---------------------- */
411 int afp_disconnect(obj, ibuf, ibuflen, rbuf, rbuflen )
414 int ibuflen, *rbuflen;
424 memcpy(&type, ibuf, sizeof(type));
426 ibuf += sizeof(type);
428 memcpy(&tklen, ibuf, sizeof(tklen));
429 tklen = ntohl(tklen);
430 ibuf += sizeof(tklen);
432 if (tklen != sizeof(pid_t)) {
435 memcpy(&token, ibuf, tklen);
436 /* killed old session, not easy */
437 return AFPERR_SESSCLOS; /* was AFP_OK */
440 /* ---------------------- */
441 static int get_version(obj, ibuf, ibuflen, len)
449 if (!len || len > ibuflen)
450 return AFPERR_BADVERS;
452 num = sizeof( afp_versions ) / sizeof( afp_versions[ 0 ]);
453 for ( i = 0; i < num; i++ ) {
454 if ( strncmp( ibuf, afp_versions[ i ].av_name , len ) == 0 ) {
455 afp_version = afp_versions[ i ].av_number;
456 afp_version_index = i;
460 if ( i == num ) /* An inappropo version */
461 return AFPERR_BADVERS ;
463 if (afp_version >= 30 && obj->proto != AFPPROTO_DSI)
464 return AFPERR_BADVERS ;
469 /* ---------------------- */
470 int afp_login(obj, ibuf, ibuflen, rbuf, rbuflen )
473 int ibuflen, *rbuflen;
475 struct passwd *pwd = NULL;
481 return send_reply(obj, AFPERR_SHUTDOWN );
484 return send_reply(obj, AFPERR_BADVERS );
487 len = (unsigned char) *ibuf++;
490 i = get_version(obj, ibuf, ibuflen, len);
492 return send_reply(obj, i );
498 return send_reply(obj, AFPERR_BADUAM);
500 len = (unsigned char) *ibuf++;
503 if (!len || len > ibuflen)
504 return send_reply(obj, AFPERR_BADUAM);
506 if ((afp_uam = auth_uamfind(UAM_SERVER_LOGIN, ibuf, len)) == NULL)
507 return send_reply(obj, AFPERR_BADUAM);
511 i = afp_uam->u.uam_login.login(obj, &pwd, ibuf, ibuflen, rbuf, rbuflen);
513 return send_reply(obj, i);
515 return send_reply(obj, login(obj, pwd, afp_uam->u.uam_login.logout));
518 /* ---------------------- */
519 int afp_login_ext(obj, ibuf, ibuflen, rbuf, rbuflen )
522 unsigned int ibuflen, *rbuflen;
524 struct passwd *pwd = NULL;
534 return send_reply(obj, AFPERR_SHUTDOWN );
537 return send_reply(obj, AFPERR_BADVERS );
543 len = (unsigned char) *ibuf;
547 i = get_version(obj, ibuf, ibuflen, len);
549 return send_reply(obj, i );
555 return send_reply(obj, AFPERR_BADUAM);
557 len = (unsigned char) *ibuf;
561 if (!len || len > ibuflen)
562 return send_reply(obj, AFPERR_BADUAM);
564 if ((afp_uam = auth_uamfind(UAM_SERVER_LOGIN, ibuf, len)) == NULL)
565 return send_reply(obj, AFPERR_BADUAM);
569 if (!afp_uam->u.uam_login.login_ext) {
570 LOG(log_error, logtype_afpd, "login_ext: uam %s not AFP 3 ready!", afp_uam->uam_name );
571 return send_reply(obj, AFPERR_BADUAM);
574 if (len <= 1 +sizeof(len16))
575 return send_reply(obj, AFPERR_PARAM);
581 return send_reply(obj, AFPERR_PARAM);
583 memcpy(&len16, ibuf, sizeof(len16));
584 ibuf += sizeof(len16);
585 ibuflen -= sizeof(len16);
588 return send_reply(obj, AFPERR_PARAM);
592 /* directory service name */
594 return send_reply(obj, AFPERR_PARAM);
603 return send_reply(obj, AFPERR_PARAM);
604 len = (unsigned char) *ibuf;
609 /* With "No User Authen" it is equal */
610 if (ibuflen < sizeof(len16))
611 return send_reply(obj, AFPERR_PARAM);
612 memcpy(&len16, ibuf, sizeof(len16));
613 ibuf += sizeof(len16);
614 ibuflen -= sizeof(len16);
618 return send_reply(obj, AFPERR_PARAM);
621 LOG(log_error, logtype_afpd, "login_ext: directory service path not null!" );
622 return send_reply(obj, AFPERR_PARAM);
628 if (ibuflen && ((unsigned long) ibuf & 1)) { /* pad character */
633 /* FIXME user name are in unicode */
634 i = afp_uam->u.uam_login.login_ext(obj, username, &pwd, ibuf, ibuflen, rbuf, rbuflen);
636 return send_reply(obj, i);
638 return send_reply(obj, login(obj, pwd, afp_uam->u.uam_login.logout));
641 /* ---------------------- */
642 int afp_logincont(obj, ibuf, ibuflen, rbuf, rbuflen)
645 int ibuflen, *rbuflen;
647 struct passwd *pwd = NULL;
650 if ( afp_uam == NULL || afp_uam->u.uam_login.logincont == NULL ) {
652 return send_reply(obj, AFPERR_NOTAUTH );
656 err = afp_uam->u.uam_login.logincont(obj, &pwd, ibuf, ibuflen,
659 return send_reply(obj, err);
661 return send_reply(obj, login(obj, pwd, afp_uam->u.uam_login.logout));
665 int afp_logout(obj, ibuf, ibuflen, rbuf, rbuflen)
668 int ibuflen, *rbuflen;
670 LOG(log_info, logtype_afpd, "logout %s", obj->username);
677 /* change password --
678 * NOTE: an FPLogin must already have completed successfully for this
679 * to work. this also does a little pre-processing before it hands
682 int afp_changepw(obj, ibuf, ibuflen, rbuf, rbuflen )
685 int ibuflen, *rbuflen;
687 char username[MACFILELEN + 1], *start = ibuf;
696 /* make sure we can deal w/ this uam */
697 len = (unsigned char) *ibuf++;
698 if ((uam = auth_uamfind(UAM_SERVER_CHANGEPW, ibuf, len)) == NULL)
699 return AFPERR_BADUAM;
702 if ((len + 1) & 1) /* pad byte */
705 len = (unsigned char) *ibuf++;
706 if ( len > sizeof(username) - 1) {
709 memcpy(username, ibuf, len);
710 username[ len ] = '\0';
712 if ((len + 1) & 1) /* pad byte */
715 LOG(log_info, logtype_afpd, "changing password for <%s>", username);
717 if (( pwd = uam_getname( username, sizeof(username))) == NULL )
720 /* send it off to the uam. we really don't use ibuflen right now. */
721 ibuflen -= (ibuf - start);
722 ret = uam->u.uam_changepw(obj, username, pwd, ibuf, ibuflen,
724 LOG(log_info, logtype_afpd, "password change %s.",
725 (ret == AFPERR_AUTHCONT) ? "continued" :
726 (ret ? "failed" : "succeeded"));
732 int afp_getuserinfo(obj, ibuf, ibuflen, rbuf, rbuflen )
735 int ibuflen, *rbuflen;
744 ibuf += sizeof(id); /* userid is not used in AFP 2.0 */
745 memcpy(&bitmap, ibuf, sizeof(bitmap));
746 bitmap = ntohs(bitmap);
748 /* deal with error cases. we don't have to worry about
749 * AFPERR_ACCESS or AFPERR_NOITEM as geteuid and getegid always
753 if ((bitmap & USERIBIT_ALL) != bitmap)
754 return AFPERR_BITMAP;
756 /* copy the bitmap back to reply buffer */
757 memcpy(rbuf, ibuf, sizeof(bitmap));
758 rbuf += sizeof(bitmap);
759 *rbuflen = sizeof(bitmap);
761 /* copy the user/group info */
762 if (bitmap & USERIBIT_USER) {
763 id = htonl(geteuid());
764 memcpy(rbuf, &id, sizeof(id));
766 *rbuflen += sizeof(id);
769 if (bitmap & USERIBIT_GROUP) {
770 id = htonl(getegid());
771 memcpy(rbuf, &id, sizeof(id));
773 *rbuflen += sizeof(id);
779 #define UAM_LIST(type) (((type) == UAM_SERVER_LOGIN || (type) == UAM_SERVER_LOGIN_EXT) ? &uam_login : \
780 (((type) == UAM_SERVER_CHANGEPW) ? \
781 &uam_changepw : NULL))
783 /* just do a linked list search. this could be sped up with a hashed
784 * list, but i doubt anyone's going to have enough uams to matter. */
785 struct uam_obj *auth_uamfind(const int type, const char *name,
788 struct uam_obj *prev, *start;
790 if (!name || !(start = UAM_LIST(type)))
794 while ((prev = prev->uam_prev) != start)
795 if (strndiacasecmp(prev->uam_name, name, len) == 0)
801 int auth_register(const int type, struct uam_obj *uam)
803 struct uam_obj *start;
805 if (!uam || !uam->uam_name || (*uam->uam_name == '\0'))
808 if (!(start = UAM_LIST(type)))
809 return 0; /* silently fail */
811 uam_attach(start, uam);
815 /* load all of the modules */
816 int auth_load(const char *path, const char *list)
818 char name[MAXPATHLEN + 1], buf[MAXPATHLEN + 1], *p;
823 if (!path || !*path || !list || (len = strlen(path)) > sizeof(name) - 2)
826 strncpy(buf, list, sizeof(buf));
827 if ((p = strtok(buf, ",")) == NULL)
831 if (name[len - 1] != '/') {
837 strncpy(name + len, p, sizeof(name) - len);
838 LOG(log_debug, logtype_afpd, "uam: loading (%s)", name);
840 if ((stat(name, &st) == 0) && (mod = uam_load(name, p))) {
842 if (stat(name, &st) == 0) {
843 if ((mod = uam_load(name, p))) {
844 uam_attach(&uam_modules, mod);
845 LOG(log_info, logtype_afpd, "uam: %s loaded", p);
847 LOG(log_info, logtype_afpd, "uam: %s load failure",p);
850 LOG(log_info, logtype_afpd, "uam: uam not found (status=%d)", stat(name, &st));
852 p = strtok(NULL, ",");
858 /* get rid of all of the uams */
861 struct uam_mod *mod, *prev, *start = &uam_modules;
863 prev = start->uam_prev;
864 while ((mod = prev) != start) {
865 prev = prev->uam_prev;