2 * $Id: auth.c,v 1.23 2002-01-19 21:29:55 jmarcus 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 );
54 #if defined( __svr4__ ) && !defined( NGROUPS )
55 #define NGROUPS NGROUPS_MAX
56 #endif /* __svr4__ NGROUPS */
57 #if defined( sun ) && !defined( __svr4__ ) || defined( ultrix )
58 int groups[ NGROUPS ];
59 #else /* sun __svr4__ ultrix */
60 #if defined( __svr4__ ) && !defined( NGROUPS )
61 #define NGROUPS NGROUPS_MAX
62 #endif /* __svr4__ NGROUPS */
63 gid_t groups[ NGROUPS ];
64 #endif /* sun ultrix */
68 * These numbers are scattered throughout the code.
70 static struct afp_versions afp_versions[] = {
71 { "AFPVersion 1.1", 11 },
72 { "AFPVersion 2.0", 20 },
73 { "AFPVersion 2.1", 21 },
77 static struct uam_mod uam_modules = {NULL, NULL, &uam_modules, &uam_modules};
78 static struct uam_obj uam_login = {"", "", 0, {{NULL}}, &uam_login,
80 static struct uam_obj uam_changepw = {"", "", 0, {{NULL}}, &uam_changepw,
83 static struct uam_obj *afp_uam = NULL;
86 void status_versions( data )
93 memcpy(&status, start + AFPSTATUS_VERSOFF, sizeof(status));
94 num = sizeof( afp_versions ) / sizeof( afp_versions[ 0 ] );
95 data += ntohs( status );
97 for ( i = 0; i < num; i++ ) {
98 len = strlen( afp_versions[ i ].av_name );
100 memcpy( data, afp_versions[ i ].av_name , len );
103 status = htons( data - start );
104 memcpy(start + AFPSTATUS_UAMSOFF, &status, sizeof(status));
107 void status_uams(char *data, const char *authlist)
111 struct uam_obj *uams;
114 memcpy(&status, start + AFPSTATUS_UAMSOFF, sizeof(status));
116 while ((uams = uams->uam_prev) != &uam_login) {
117 if (strstr(authlist, uams->uam_path))
121 data += ntohs( status );
123 while ((uams = uams->uam_prev) != &uam_login) {
124 if (strstr(authlist, uams->uam_path)) {
125 LOG(log_info, logtype_default, "uam: \"%s\" available", uams->uam_name);
126 len = strlen( uams->uam_name);
128 memcpy( data, uams->uam_name, len );
134 status = htons(data - start);
135 memcpy(start + AFPSTATUS_ICONOFF, &status, sizeof(status));
138 /* handle errors by closing the connection. this is only needed
139 * by the afp_* functions. */
140 static int send_reply(const AFPObj *obj, const int err)
142 if ((err == AFP_OK) || (err == AFPERR_AUTHCONT))
145 obj->reply(obj->handle, err);
151 static int login(AFPObj *obj, struct passwd *pwd, void (*logout)(void))
155 #endif /* ADMIN_GRP */
157 /* UAM had syslog control; afpd needs to reassert itself */
158 set_processname("afpd");
159 syslog_setup(log_debug, logtype_default, logoption_ndelay|logoption_pid, logfacility_daemon);
161 if ( pwd->pw_uid == 0 ) { /* don't allow root login */
162 LOG(log_error, logtype_default, "login: root login denied!" );
163 return AFPERR_NOTAUTH;
166 LOG(log_info, logtype_default, "login %s (uid %d, gid %d)", pwd->pw_name,
167 pwd->pw_uid, pwd->pw_gid );
169 if (obj->proto == AFPPROTO_ASP) {
170 ASP asp = obj->handle;
171 int addr_net = ntohs( asp->asp_sat.sat_addr.s_net );
172 int addr_node = asp->asp_sat.sat_addr.s_node;
174 if (obj->options.authprintdir) {
175 if(addr_net && addr_node) { /* Do we have a valid Appletalk address? */
178 struct stat stat_buf;
180 sprintf(nodename, "%s/net%d.%dnode%d", obj->options.authprintdir,
181 addr_net / 256, addr_net % 256, addr_node);
182 LOG(log_info, logtype_default, "registering %s (uid %d) on %u.%u as %s",
183 pwd->pw_name, pwd->pw_uid, addr_net, addr_node, nodename);
185 if (stat(nodename, &stat_buf) == 0) { /* file exists */
186 if (S_ISREG(stat_buf.st_mode)) { /* normal file */
188 fp = fopen(nodename, "w");
189 fprintf(fp, "%s\n", pwd->pw_name);
191 chown( nodename, pwd->pw_uid, -1 );
192 } else { /* somebody is messing with us */
193 LOG(log_error, logtype_default, "print authfile %s is not a normal file, it will not be modified", nodename );
195 } else { /* file 'nodename' does not exist */
196 fp = fopen(nodename, "w");
197 fprintf(fp, "%s\n", pwd->pw_name);
199 chown( nodename, pwd->pw_uid, -1 );
201 } /* if (addr_net && addr_node ) */
202 } /* if (options->authprintdir) */
203 } /* if (obj->proto == AFPPROTO_ASP) */
205 if (initgroups( pwd->pw_name, pwd->pw_gid ) < 0) {
207 LOG(log_info, logtype_default, "running with uid %d", geteuid());
208 #else /* RUN_AS_USER */
209 LOG(log_error, logtype_default, "login: %s", strerror(errno));
210 return AFPERR_BADUAM;
211 #endif /* RUN_AS_USER */
215 /* Basically if the user is in the admin group, we stay root */
217 if (( ngroups = getgroups( NGROUPS, groups )) < 0 ) {
218 LOG(log_error, logtype_default, "login: getgroups: %s", strerror(errno) );
219 return AFPERR_BADUAM;
223 LOG(log_info, logtype_default, "obj->options.admingid == %d", obj->options.admingid);
225 if (obj->options.admingid != 0) {
227 for (i = 0; i < ngroups; i++) {
228 if (groups[i] == obj->options.admingid) admin = 1;
231 if (admin) LOG(log_info, logtype_default, "admin login -- %s", pwd->pw_name );
236 struct DSI *dsi = obj->handle;
243 afp_get_cmdline( &argc, &argv );
245 hp = gethostbyaddr( (char *) &dsi->client.sin_addr,
246 sizeof( struct in_addr ),
247 dsi->client.sin_family );
250 clientname = hp->h_name;
252 clientname = inet_ntoa( dsi->client.sin_addr );
254 sprintf( hostname, "%s@%s", pwd->pw_name, clientname );
256 if( sia_become_user( NULL, argc, argv, hostname, pwd->pw_name,
257 NULL, FALSE, NULL, NULL,
258 SIA_BEU_REALLOGIN ) != SIASUCCESS )
259 return AFPERR_BADUAM;
261 LOG(log_info, logtype_default, "session from %s (%s)", hostname,
262 inet_ntoa( dsi->client.sin_addr ) );
264 if (setegid( pwd->pw_gid ) < 0 || seteuid( pwd->pw_uid ) < 0) {
265 LOG(log_error, logtype_default, "login: %m" );
266 return AFPERR_BADUAM;
270 if (setegid( pwd->pw_gid ) < 0 || seteuid( pwd->pw_uid ) < 0) {
271 LOG(log_error, logtype_default, "login: %s", strerror(errno) );
272 return AFPERR_BADUAM;
276 /* There's probably a better way to do this, but for now, we just
282 #endif /* ADMIN_GRP */
285 afp_switch = postauth_switch;
286 obj->logout = logout;
291 int afp_login(obj, ibuf, ibuflen, rbuf, rbuflen )
294 int ibuflen, *rbuflen;
296 struct passwd *pwd = NULL;
302 return send_reply(obj, AFPERR_SHUTDOWN );
305 len = (unsigned char) *ibuf++;
306 num = sizeof( afp_versions ) / sizeof( afp_versions[ 0 ]);
307 for ( i = 0; i < num; i++ ) {
308 if ( strncmp( ibuf, afp_versions[ i ].av_name , len ) == 0 ) {
309 afp_version = afp_versions[ i ].av_number;
313 if ( i == num ) /* An inappropo version */
314 return send_reply(obj, AFPERR_BADVERS );
317 len = (unsigned char) *ibuf++;
318 if ((afp_uam = auth_uamfind(UAM_SERVER_LOGIN, ibuf, len)) == NULL)
319 return send_reply(obj, AFPERR_BADUAM);
322 i = afp_uam->u.uam_login.login(obj, &pwd, ibuf, ibuflen, rbuf, rbuflen);
324 return send_reply(obj, i);
326 return send_reply(obj, login(obj, pwd, afp_uam->u.uam_login.logout));
330 int afp_logincont(obj, ibuf, ibuflen, rbuf, rbuflen)
333 int ibuflen, *rbuflen;
335 struct passwd *pwd = NULL;
338 if ( afp_uam == NULL || afp_uam->u.uam_login.logincont == NULL ) {
340 return send_reply(obj, AFPERR_NOTAUTH );
344 err = afp_uam->u.uam_login.logincont(obj, &pwd, ibuf, ibuflen,
347 return send_reply(obj, err);
349 return send_reply(obj, login(obj, pwd, afp_uam->u.uam_login.logout));
353 int afp_logout(obj, ibuf, ibuflen, rbuf, rbuflen)
356 int ibuflen, *rbuflen;
358 LOG(log_info, logtype_default, "logout %s", obj->username);
365 /* change password --
366 * NOTE: an FPLogin must already have completed successfully for this
367 * to work. this also does a little pre-processing before it hands
370 int afp_changepw(obj, ibuf, ibuflen, rbuf, rbuflen )
373 int ibuflen, *rbuflen;
375 char username[MACFILELEN + 1], *start = ibuf;
383 /* make sure we can deal w/ this uam */
384 len = (unsigned char) *ibuf++;
385 if ((uam = auth_uamfind(UAM_SERVER_CHANGEPW, ibuf, len)) == NULL)
386 return AFPERR_BADUAM;
389 if ((len + 1) & 1) /* pad byte */
392 len = (unsigned char) *ibuf++;
393 if ( len > sizeof(username) - 1) {
396 memcpy(username, ibuf, len);
397 username[ len ] = '\0';
399 if ((len + 1) & 1) /* pad byte */
402 LOG(log_info, logtype_default, "changing password for <%s>", username);
404 if (( pwd = uam_getname( username, sizeof(username))) == NULL )
407 /* send it off to the uam. we really don't use ibuflen right now. */
408 ibuflen -= (ibuf - start);
409 len = uam->u.uam_changepw(obj, username, pwd, ibuf, ibuflen,
411 LOG(log_info, logtype_default, "password change %s.",
412 (len == AFPERR_AUTHCONT) ? "continued" :
413 (len ? "failed" : "succeeded"));
419 int afp_getuserinfo(obj, ibuf, ibuflen, rbuf, rbuflen )
422 int ibuflen, *rbuflen;
431 ibuf += sizeof(id); /* userid is not used in AFP 2.0 */
432 memcpy(&bitmap, ibuf, sizeof(bitmap));
433 bitmap = ntohs(bitmap);
435 /* deal with error cases. we don't have to worry about
436 * AFPERR_ACCESS or AFPERR_NOITEM as geteuid and getegid always
440 if ((bitmap & USERIBIT_ALL) != bitmap)
441 return AFPERR_BITMAP;
443 /* copy the bitmap back to reply buffer */
444 memcpy(rbuf, ibuf, sizeof(bitmap));
445 rbuf += sizeof(bitmap);
446 *rbuflen = sizeof(bitmap);
448 /* copy the user/group info */
449 if (bitmap & USERIBIT_USER) {
450 id = htonl(geteuid());
451 memcpy(rbuf, &id, sizeof(id));
453 *rbuflen += sizeof(id);
456 if (bitmap & USERIBIT_GROUP) {
457 id = htonl(getegid());
458 memcpy(rbuf, &id, sizeof(id));
460 *rbuflen += sizeof(id);
466 #define UAM_LIST(type) (((type) == UAM_SERVER_LOGIN) ? &uam_login : \
467 (((type) == UAM_SERVER_CHANGEPW) ? \
468 &uam_changepw : NULL))
470 /* just do a linked list search. this could be sped up with a hashed
471 * list, but i doubt anyone's going to have enough uams to matter. */
472 struct uam_obj *auth_uamfind(const int type, const char *name,
475 struct uam_obj *prev, *start;
477 if (!name || !(start = UAM_LIST(type)))
481 while ((prev = prev->uam_prev) != start)
482 if (strndiacasecmp(prev->uam_name, name, len) == 0)
488 int auth_register(const int type, struct uam_obj *uam)
490 struct uam_obj *start;
492 if (!uam || !uam->uam_name || (*uam->uam_name == '\0'))
495 if (!(start = UAM_LIST(type)))
496 return 0; /* silently fail */
498 uam_attach(start, uam);
502 /* load all of the modules */
503 int auth_load(const char *path, const char *list)
505 char name[MAXPATHLEN + 1], buf[MAXPATHLEN + 1], *p;
510 if (!path || !list || (len = strlen(path)) > sizeof(name) - 2)
513 strncpy(buf, list, sizeof(buf));
514 if ((p = strtok(buf, ",")) == NULL)
518 if (name[len - 1] != '/') {
524 strncpy(name + len, p, sizeof(name) - len);
525 LOG(log_debug, logtype_default, "uam: loading (%s)", name);
527 if ((stat(name, &st) == 0) && (mod = uam_load(name, p))) {
529 if (stat(name, &st) == 0) {
530 if ((mod = uam_load(name, p))) {
531 uam_attach(&uam_modules, mod);
532 LOG(log_info, logtype_default, "uam: %s loaded", p);
534 LOG(log_info, logtype_default, "uam: %s load failure",p);
537 LOG(log_info, logtype_default, "uam: uam not found (status=%d)", stat(name, &st));
539 p = strtok(NULL, ",");
545 /* get rid of all of the uams */
548 struct uam_mod *mod, *prev, *start = &uam_modules;
550 prev = start->uam_prev;
551 while ((mod = prev) != start) {
552 prev = prev->uam_prev;