2 * $Id: auth.c,v 1.32 2002-10-12 04:02:46 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]);
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;
240 if (admin) LOG(log_info, logtype_afpd, "admin login -- %s", pwd->pw_name );
245 struct DSI *dsi = obj->handle;
252 afp_get_cmdline( &argc, &argv );
254 hp = gethostbyaddr( (char *) &dsi->client.sin_addr,
255 sizeof( struct in_addr ),
256 dsi->client.sin_family );
259 clientname = hp->h_name;
261 clientname = inet_ntoa( dsi->client.sin_addr );
263 sprintf( hostname, "%s@%s", pwd->pw_name, clientname );
265 if( sia_become_user( NULL, argc, argv, hostname, pwd->pw_name,
266 NULL, FALSE, NULL, NULL,
267 SIA_BEU_REALLOGIN ) != SIASUCCESS )
268 return AFPERR_BADUAM;
270 LOG(log_info, logtype_afpd, "session from %s (%s)", hostname,
271 inet_ntoa( dsi->client.sin_addr ) );
272 if (setegid( pwd->pw_gid ) < 0 || seteuid( pwd->pw_uid ) < 0) {
273 LOG(log_error, logtype_afpd, "login: %s", strerror(errno) );
274 return AFPERR_BADUAM;
279 if (setregid(pwd->pw_gid, pwd->pw_gid ) < 0 || setreuid(pwd->pw_uid,pwd->pw_uid ) < 0) {
281 if (setegid( pwd->pw_gid ) < 0 || seteuid( pwd->pw_uid ) < 0) {
282 LOG(log_error, logtype_afpd, "login: %s", strerror(errno) );
283 return AFPERR_BADUAM;
287 /* There's probably a better way to do this, but for now, we just
293 #endif /* ADMIN_GRP */
296 afp_switch = postauth_switch;
297 switch (afp_version) {
299 uam_afpserver_action(AFP_ENUMERATE_EXT2, UAM_AFPSERVER_POSTAUTH, afp_enumerate_ext2, NULL);
301 uam_afpserver_action(AFP_BYTELOCK_EXT, UAM_AFPSERVER_POSTAUTH, afp_bytelock_ext, NULL);
302 /* enumerate_ext and catsearch_ext are using the same packet as no ext calls */
303 #ifdef WITH_CATSEARCH
304 uam_afpserver_action(AFP_CATSEARCH_EXT, UAM_AFPSERVER_POSTAUTH, afp_catsearch, NULL);
306 uam_afpserver_action(AFP_GETSESSTOKEN, UAM_AFPSERVER_POSTAUTH, afp_getsession, NULL);
307 uam_afpserver_action(AFP_DISCTOLDSESS, UAM_AFPSERVER_POSTAUTH, afp_disconnect, NULL);
308 uam_afpserver_action(AFP_ENUMERATE_EXT, UAM_AFPSERVER_POSTAUTH, afp_enumerate, NULL);
309 uam_afpserver_action(AFP_READ_EXT, UAM_AFPSERVER_POSTAUTH, afp_read_ext, NULL);
310 uam_afpserver_action(AFP_WRITE_EXT, UAM_AFPSERVER_POSTAUTH, afp_write_ext, NULL);
313 obj->logout = logout;
317 save_uidgid ( &obj->uidgid );
323 /* ---------------------- */
324 int afp_getsession(obj, ibuf, ibuflen, rbuf, rbuflen )
327 unsigned int ibuflen, *rbuflen;
340 memcpy(&type, ibuf, sizeof(type));
342 ibuf += sizeof(type);
343 ibuflen -= sizeof(type);
348 case 0: /* old version ?*/
350 case 1: /* disconnect */
351 case 2: /* reconnect update id */
352 if (ibuflen >= sizeof(idlen)) {
353 memcpy(&idlen, ibuf, sizeof(idlen));
354 idlen = ntohl(idlen);
355 ibuf += sizeof(idlen);
356 ibuflen -= sizeof(idlen);
357 if (ibuflen < idlen) {
360 /* memcpy (id, ibuf, idlen) */
364 *rbuflen = sizeof(type);
366 memcpy(rbuf, &type, sizeof(type));
367 rbuf += sizeof(type);
369 *rbuflen += sizeof(tklen);
370 tklen = htonl(sizeof(pid_t));
371 memcpy(rbuf, &tklen, sizeof(tklen));
372 rbuf += sizeof(tklen);
374 *rbuflen += sizeof(pid_t);
376 memcpy(rbuf, &token, sizeof(pid_t));
380 /* ---------------------- */
381 int afp_disconnect(obj, ibuf, ibuflen, rbuf, rbuflen )
384 int ibuflen, *rbuflen;
394 memcpy(&type, ibuf, sizeof(type));
396 ibuf += sizeof(type);
398 memcpy(&tklen, ibuf, sizeof(tklen));
399 tklen = ntohl(tklen);
400 ibuf += sizeof(tklen);
402 if (tklen != sizeof(pid_t)) {
405 memcpy(&token, ibuf, tklen);
406 /* killed old session, not easy */
410 /* ---------------------- */
411 static int get_version(obj, ibuf, ibuflen, len)
419 if (!len || len > ibuflen)
420 return AFPERR_BADVERS;
422 num = sizeof( afp_versions ) / sizeof( afp_versions[ 0 ]);
423 for ( i = 0; i < num; i++ ) {
424 if ( strncmp( ibuf, afp_versions[ i ].av_name , len ) == 0 ) {
425 afp_version = afp_versions[ i ].av_number;
426 afp_version_index = i;
430 if ( i == num ) /* An inappropo version */
431 return AFPERR_BADVERS ;
433 if (afp_version >= 30 && obj->proto != AFPPROTO_DSI)
434 return AFPERR_BADVERS ;
439 /* ---------------------- */
440 int afp_login(obj, ibuf, ibuflen, rbuf, rbuflen )
443 int ibuflen, *rbuflen;
445 struct passwd *pwd = NULL;
451 return send_reply(obj, AFPERR_SHUTDOWN );
454 return send_reply(obj, AFPERR_BADVERS );
457 len = (unsigned char) *ibuf++;
460 i = get_version(obj, ibuf, ibuflen, len);
462 return send_reply(obj, i );
468 return send_reply(obj, AFPERR_BADUAM);
470 len = (unsigned char) *ibuf++;
473 if (!len || len > ibuflen)
474 return send_reply(obj, AFPERR_BADUAM);
476 if ((afp_uam = auth_uamfind(UAM_SERVER_LOGIN, ibuf, len)) == NULL)
477 return send_reply(obj, AFPERR_BADUAM);
481 i = afp_uam->u.uam_login.login(obj, &pwd, ibuf, ibuflen, rbuf, rbuflen);
483 return send_reply(obj, i);
485 return send_reply(obj, login(obj, pwd, afp_uam->u.uam_login.logout));
488 /* ---------------------- */
489 int afp_login_ext(obj, ibuf, ibuflen, rbuf, rbuflen )
492 int ibuflen, *rbuflen;
494 struct passwd *pwd = NULL;
503 return send_reply(obj, AFPERR_SHUTDOWN );
506 return send_reply(obj, AFPERR_BADVERS );
510 len = (unsigned char) *ibuf++;
513 i = get_version(obj, ibuf, ibuflen, len);
515 return send_reply(obj, i );
521 return send_reply(obj, AFPERR_BADUAM);
523 len = (unsigned char) *ibuf++;
526 if (!len || len > ibuflen)
527 return send_reply(obj, AFPERR_BADUAM);
529 if ((afp_uam = auth_uamfind(UAM_SERVER_LOGIN, ibuf, len)) == NULL)
530 return send_reply(obj, AFPERR_BADUAM);
534 /* FIXME user name */
536 return send_reply(obj, AFPERR_PARAM);
541 i = afp_uam->u.uam_login.login(obj, &pwd, ibuf, ibuflen, rbuf, rbuflen);
543 return send_reply(obj, i);
545 return send_reply(obj, login(obj, pwd, afp_uam->u.uam_login.logout));
548 /* ---------------------- */
549 int afp_logincont(obj, ibuf, ibuflen, rbuf, rbuflen)
552 int ibuflen, *rbuflen;
554 struct passwd *pwd = NULL;
557 if ( afp_uam == NULL || afp_uam->u.uam_login.logincont == NULL ) {
559 return send_reply(obj, AFPERR_NOTAUTH );
563 err = afp_uam->u.uam_login.logincont(obj, &pwd, ibuf, ibuflen,
566 return send_reply(obj, err);
568 return send_reply(obj, login(obj, pwd, afp_uam->u.uam_login.logout));
572 int afp_logout(obj, ibuf, ibuflen, rbuf, rbuflen)
575 int ibuflen, *rbuflen;
577 LOG(log_info, logtype_afpd, "logout %s", obj->username);
584 /* change password --
585 * NOTE: an FPLogin must already have completed successfully for this
586 * to work. this also does a little pre-processing before it hands
589 int afp_changepw(obj, ibuf, ibuflen, rbuf, rbuflen )
592 int ibuflen, *rbuflen;
594 char username[MACFILELEN + 1], *start = ibuf;
603 /* make sure we can deal w/ this uam */
604 len = (unsigned char) *ibuf++;
605 if ((uam = auth_uamfind(UAM_SERVER_CHANGEPW, ibuf, len)) == NULL)
606 return AFPERR_BADUAM;
609 if ((len + 1) & 1) /* pad byte */
612 len = (unsigned char) *ibuf++;
613 if ( len > sizeof(username) - 1) {
616 memcpy(username, ibuf, len);
617 username[ len ] = '\0';
619 if ((len + 1) & 1) /* pad byte */
622 LOG(log_info, logtype_afpd, "changing password for <%s>", username);
624 if (( pwd = uam_getname( username, sizeof(username))) == NULL )
627 /* send it off to the uam. we really don't use ibuflen right now. */
628 ibuflen -= (ibuf - start);
629 ret = uam->u.uam_changepw(obj, username, pwd, ibuf, ibuflen,
631 LOG(log_info, logtype_afpd, "password change %s.",
632 (ret == AFPERR_AUTHCONT) ? "continued" :
633 (ret ? "failed" : "succeeded"));
639 int afp_getuserinfo(obj, ibuf, ibuflen, rbuf, rbuflen )
642 int ibuflen, *rbuflen;
651 ibuf += sizeof(id); /* userid is not used in AFP 2.0 */
652 memcpy(&bitmap, ibuf, sizeof(bitmap));
653 bitmap = ntohs(bitmap);
655 /* deal with error cases. we don't have to worry about
656 * AFPERR_ACCESS or AFPERR_NOITEM as geteuid and getegid always
660 if ((bitmap & USERIBIT_ALL) != bitmap)
661 return AFPERR_BITMAP;
663 /* copy the bitmap back to reply buffer */
664 memcpy(rbuf, ibuf, sizeof(bitmap));
665 rbuf += sizeof(bitmap);
666 *rbuflen = sizeof(bitmap);
668 /* copy the user/group info */
669 if (bitmap & USERIBIT_USER) {
670 id = htonl(geteuid());
671 memcpy(rbuf, &id, sizeof(id));
673 *rbuflen += sizeof(id);
676 if (bitmap & USERIBIT_GROUP) {
677 id = htonl(getegid());
678 memcpy(rbuf, &id, sizeof(id));
680 *rbuflen += sizeof(id);
686 #define UAM_LIST(type) (((type) == UAM_SERVER_LOGIN) ? &uam_login : \
687 (((type) == UAM_SERVER_CHANGEPW) ? \
688 &uam_changepw : NULL))
690 /* just do a linked list search. this could be sped up with a hashed
691 * list, but i doubt anyone's going to have enough uams to matter. */
692 struct uam_obj *auth_uamfind(const int type, const char *name,
695 struct uam_obj *prev, *start;
697 if (!name || !(start = UAM_LIST(type)))
701 while ((prev = prev->uam_prev) != start)
702 if (strndiacasecmp(prev->uam_name, name, len) == 0)
708 int auth_register(const int type, struct uam_obj *uam)
710 struct uam_obj *start;
712 if (!uam || !uam->uam_name || (*uam->uam_name == '\0'))
715 if (!(start = UAM_LIST(type)))
716 return 0; /* silently fail */
718 uam_attach(start, uam);
722 /* load all of the modules */
723 int auth_load(const char *path, const char *list)
725 char name[MAXPATHLEN + 1], buf[MAXPATHLEN + 1], *p;
730 if (!path || !*path || !list || (len = strlen(path)) > sizeof(name) - 2)
733 strncpy(buf, list, sizeof(buf));
734 if ((p = strtok(buf, ",")) == NULL)
738 if (name[len - 1] != '/') {
744 strncpy(name + len, p, sizeof(name) - len);
745 LOG(log_debug, logtype_afpd, "uam: loading (%s)", name);
747 if ((stat(name, &st) == 0) && (mod = uam_load(name, p))) {
749 if (stat(name, &st) == 0) {
750 if ((mod = uam_load(name, p))) {
751 uam_attach(&uam_modules, mod);
752 LOG(log_info, logtype_afpd, "uam: %s loaded", p);
754 LOG(log_info, logtype_afpd, "uam: %s load failure",p);
757 LOG(log_info, logtype_afpd, "uam: uam not found (status=%d)", stat(name, &st));
759 p = strtok(NULL, ",");
765 /* get rid of all of the uams */
768 struct uam_mod *mod, *prev, *start = &uam_modules;
770 prev = start->uam_prev;
771 while ((mod = prev) != start) {
772 prev = prev->uam_prev;