2 * $Id: auth.c,v 1.30 2002-10-11 14:18:25 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 ) );
273 if (setegid( pwd->pw_gid ) < 0 || seteuid( pwd->pw_uid ) < 0) {
274 LOG(log_error, logtype_afpd, "login: %s", strerror(errno) );
275 return AFPERR_BADUAM;
279 if (setegid( pwd->pw_gid ) < 0 || seteuid( pwd->pw_uid ) < 0) {
280 LOG(log_error, logtype_afpd, "login: %s", strerror(errno) );
281 return AFPERR_BADUAM;
285 /* There's probably a better way to do this, but for now, we just
291 #endif /* ADMIN_GRP */
294 afp_switch = postauth_switch;
295 switch (afp_version) {
297 uam_afpserver_action(AFP_ENUMERATE_EXT2, UAM_AFPSERVER_POSTAUTH, afp_enumerate_ext2, NULL);
299 uam_afpserver_action(AFP_BYTELOCK_EXT, UAM_AFPSERVER_POSTAUTH, afp_bytelock_ext, NULL);
300 /* enumerate_ext and catsearch_ext are using the same packet as no ext calls */
301 #ifdef WITH_CATSEARCH
302 uam_afpserver_action(AFP_CATSEARCH_EXT, UAM_AFPSERVER_POSTAUTH, afp_catsearch, NULL);
304 uam_afpserver_action(AFP_ENUMERATE_EXT, UAM_AFPSERVER_POSTAUTH, afp_enumerate, NULL);
305 uam_afpserver_action(AFP_READ_EXT, UAM_AFPSERVER_POSTAUTH, afp_read_ext, NULL);
306 uam_afpserver_action(AFP_WRITE_EXT, UAM_AFPSERVER_POSTAUTH, afp_write_ext, NULL);
309 obj->logout = logout;
313 save_uidgid ( &obj->uidgid );
319 int afp_login(obj, ibuf, ibuflen, rbuf, rbuflen )
322 int ibuflen, *rbuflen;
324 struct passwd *pwd = NULL;
331 return send_reply(obj, AFPERR_SHUTDOWN );
334 return send_reply(obj, AFPERR_BADVERS );
337 len = (unsigned char) *ibuf++;
340 if (!len || len > ibuflen)
341 return send_reply(obj, AFPERR_BADVERS );
343 num = sizeof( afp_versions ) / sizeof( afp_versions[ 0 ]);
344 for ( i = 0; i < num; i++ ) {
345 if ( strncmp( ibuf, afp_versions[ i ].av_name , len ) == 0 ) {
346 afp_version = afp_versions[ i ].av_number;
347 afp_version_index = i;
351 if ( i == num ) /* An inappropo version */
352 return send_reply(obj, AFPERR_BADVERS );
354 if (afp_version >= 30 && obj->proto != AFPPROTO_DSI)
355 return send_reply(obj, AFPERR_BADVERS );
361 return send_reply(obj, AFPERR_BADUAM);
363 len = (unsigned char) *ibuf++;
366 if (!len || len > ibuflen)
367 return send_reply(obj, AFPERR_BADUAM);
369 if ((afp_uam = auth_uamfind(UAM_SERVER_LOGIN, ibuf, len)) == NULL)
370 return send_reply(obj, AFPERR_BADUAM);
374 i = afp_uam->u.uam_login.login(obj, &pwd, ibuf, ibuflen, rbuf, rbuflen);
376 return send_reply(obj, i);
378 return send_reply(obj, login(obj, pwd, afp_uam->u.uam_login.logout));
382 int afp_logincont(obj, ibuf, ibuflen, rbuf, rbuflen)
385 int ibuflen, *rbuflen;
387 struct passwd *pwd = NULL;
390 if ( afp_uam == NULL || afp_uam->u.uam_login.logincont == NULL ) {
392 return send_reply(obj, AFPERR_NOTAUTH );
396 err = afp_uam->u.uam_login.logincont(obj, &pwd, ibuf, ibuflen,
399 return send_reply(obj, err);
401 return send_reply(obj, login(obj, pwd, afp_uam->u.uam_login.logout));
405 int afp_logout(obj, ibuf, ibuflen, rbuf, rbuflen)
408 int ibuflen, *rbuflen;
410 LOG(log_info, logtype_afpd, "logout %s", obj->username);
417 /* change password --
418 * NOTE: an FPLogin must already have completed successfully for this
419 * to work. this also does a little pre-processing before it hands
422 int afp_changepw(obj, ibuf, ibuflen, rbuf, rbuflen )
425 int ibuflen, *rbuflen;
427 char username[MACFILELEN + 1], *start = ibuf;
436 /* make sure we can deal w/ this uam */
437 len = (unsigned char) *ibuf++;
438 if ((uam = auth_uamfind(UAM_SERVER_CHANGEPW, ibuf, len)) == NULL)
439 return AFPERR_BADUAM;
442 if ((len + 1) & 1) /* pad byte */
445 len = (unsigned char) *ibuf++;
446 if ( len > sizeof(username) - 1) {
449 memcpy(username, ibuf, len);
450 username[ len ] = '\0';
452 if ((len + 1) & 1) /* pad byte */
455 LOG(log_info, logtype_afpd, "changing password for <%s>", username);
457 if (( pwd = uam_getname( username, sizeof(username))) == NULL )
460 /* send it off to the uam. we really don't use ibuflen right now. */
461 ibuflen -= (ibuf - start);
462 ret = uam->u.uam_changepw(obj, username, pwd, ibuf, ibuflen,
464 LOG(log_info, logtype_afpd, "password change %s.",
465 (ret == AFPERR_AUTHCONT) ? "continued" :
466 (ret ? "failed" : "succeeded"));
472 int afp_getuserinfo(obj, ibuf, ibuflen, rbuf, rbuflen )
475 int ibuflen, *rbuflen;
484 ibuf += sizeof(id); /* userid is not used in AFP 2.0 */
485 memcpy(&bitmap, ibuf, sizeof(bitmap));
486 bitmap = ntohs(bitmap);
488 /* deal with error cases. we don't have to worry about
489 * AFPERR_ACCESS or AFPERR_NOITEM as geteuid and getegid always
493 if ((bitmap & USERIBIT_ALL) != bitmap)
494 return AFPERR_BITMAP;
496 /* copy the bitmap back to reply buffer */
497 memcpy(rbuf, ibuf, sizeof(bitmap));
498 rbuf += sizeof(bitmap);
499 *rbuflen = sizeof(bitmap);
501 /* copy the user/group info */
502 if (bitmap & USERIBIT_USER) {
503 id = htonl(geteuid());
504 memcpy(rbuf, &id, sizeof(id));
506 *rbuflen += sizeof(id);
509 if (bitmap & USERIBIT_GROUP) {
510 id = htonl(getegid());
511 memcpy(rbuf, &id, sizeof(id));
513 *rbuflen += sizeof(id);
519 #define UAM_LIST(type) (((type) == UAM_SERVER_LOGIN) ? &uam_login : \
520 (((type) == UAM_SERVER_CHANGEPW) ? \
521 &uam_changepw : NULL))
523 /* just do a linked list search. this could be sped up with a hashed
524 * list, but i doubt anyone's going to have enough uams to matter. */
525 struct uam_obj *auth_uamfind(const int type, const char *name,
528 struct uam_obj *prev, *start;
530 if (!name || !(start = UAM_LIST(type)))
534 while ((prev = prev->uam_prev) != start)
535 if (strndiacasecmp(prev->uam_name, name, len) == 0)
541 int auth_register(const int type, struct uam_obj *uam)
543 struct uam_obj *start;
545 if (!uam || !uam->uam_name || (*uam->uam_name == '\0'))
548 if (!(start = UAM_LIST(type)))
549 return 0; /* silently fail */
551 uam_attach(start, uam);
555 /* load all of the modules */
556 int auth_load(const char *path, const char *list)
558 char name[MAXPATHLEN + 1], buf[MAXPATHLEN + 1], *p;
563 if (!path || !*path || !list || (len = strlen(path)) > sizeof(name) - 2)
566 strncpy(buf, list, sizeof(buf));
567 if ((p = strtok(buf, ",")) == NULL)
571 if (name[len - 1] != '/') {
577 strncpy(name + len, p, sizeof(name) - len);
578 LOG(log_debug, logtype_afpd, "uam: loading (%s)", name);
580 if ((stat(name, &st) == 0) && (mod = uam_load(name, p))) {
582 if (stat(name, &st) == 0) {
583 if ((mod = uam_load(name, p))) {
584 uam_attach(&uam_modules, mod);
585 LOG(log_info, logtype_afpd, "uam: %s loaded", p);
587 LOG(log_info, logtype_afpd, "uam: %s load failure",p);
590 LOG(log_info, logtype_afpd, "uam: uam not found (status=%d)", stat(name, &st));
592 p = strtok(NULL, ",");
598 /* get rid of all of the uams */
601 struct uam_mod *mod, *prev, *start = &uam_modules;
603 prev = start->uam_prev;
604 while ((mod = prev) != start) {
605 prev = prev->uam_prev;