2 * Copyright (c) 1990,1993 Regents of The University of Michigan.
3 * All Rights Reserved. See COPYRIGHT.
13 #include <sys/types.h>
14 #include <sys/param.h>
16 #include <netatalk/endian.h>
17 #include <atalk/afp.h>
18 #include <atalk/compat.h>
19 #include <atalk/util.h>
40 #if defined( __svr4__ ) && !defined( NGROUPS )
41 #define NGROUPS NGROUPS_MAX
42 #endif __svr4__ NGROUPS
43 #if defined( sun ) && !defined( __svr4__ ) || defined( ultrix )
44 int groups[ NGROUPS ];
45 #else sun __svr4__ ultrix
46 #if defined( __svr4__ ) && !defined( NGROUPS )
47 #define NGROUPS NGROUPS_MAX
48 #endif __svr4__ NGROUPS
49 gid_t groups[ NGROUPS ];
54 * These numbers are scattered throughout the code.
56 static struct afp_versions afp_versions[] = {
57 { "AFPVersion 1.1", 11 },
58 { "AFPVersion 2.0", 20 },
59 { "AFPVersion 2.1", 21 },
63 static struct uam_mod uam_modules = {NULL, NULL, &uam_modules, &uam_modules};
64 static struct uam_obj uam_login = {"", "", 0, {{NULL}}, &uam_login,
66 static struct uam_obj uam_changepw = {"", "", 0, {{NULL}}, &uam_changepw,
69 static struct uam_obj *afp_uam = NULL;
72 void status_versions( data )
79 memcpy(&status, start + AFPSTATUS_VERSOFF, sizeof(status));
80 num = sizeof( afp_versions ) / sizeof( afp_versions[ 0 ] );
81 data += ntohs( status );
83 for ( i = 0; i < num; i++ ) {
84 len = strlen( afp_versions[ i ].av_name );
86 memcpy( data, afp_versions[ i ].av_name , len );
89 status = htons( data - start );
90 memcpy(start + AFPSTATUS_UAMSOFF, &status, sizeof(status));
93 void status_uams(char *data, const char *authlist)
100 memcpy(&status, start + AFPSTATUS_UAMSOFF, sizeof(status));
102 while ((uams = uams->uam_prev) != &uam_login) {
103 if (strstr(authlist, uams->uam_path))
107 data += ntohs( status );
109 while ((uams = uams->uam_prev) != &uam_login) {
110 if (strstr(authlist, uams->uam_path)) {
111 syslog(LOG_INFO, "uam: \"%s\" available", uams->uam_name);
112 len = strlen( uams->uam_name);
114 memcpy( data, uams->uam_name, len );
120 status = htons(data - start);
121 memcpy(start + AFPSTATUS_ICONOFF, &status, sizeof(status));
124 /* handle errors by closing the connection. this is only needed
125 * by the afp_* functions. */
126 static int send_reply(const AFPObj *obj, const int err)
128 if ((err == AFP_OK) || (err == AFPERR_AUTHCONT))
131 obj->reply(obj->handle, err);
137 static int login(AFPObj *obj, struct passwd *pwd, void (*logout)(void))
143 /* UAM had syslog control; afpd needs to reassert itself */
144 openlog( "afpd", LOG_NDELAY|LOG_PID, LOG_DAEMON);
146 if ( pwd->pw_uid == 0 ) { /* don't allow root login */
147 syslog( LOG_ERR, "login: root login denied!" );
148 return AFPERR_NOTAUTH;
151 syslog( LOG_INFO, "login %s (uid %d, gid %d)", pwd->pw_name,
152 pwd->pw_uid, pwd->pw_gid );
154 if (obj->proto == AFPPROTO_ASP) {
155 ASP asp = obj->handle;
156 int addr_net = ntohs( asp->asp_sat.sat_addr.s_net );
157 int addr_node = asp->asp_sat.sat_addr.s_node;
159 if (obj->options.authprintdir) {
160 if(addr_net && addr_node) { /* Do we have a valid Appletalk address? */
163 struct stat stat_buf;
165 sprintf(nodename, "%s/net%d.%dnode%d", obj->options.authprintdir,
166 addr_net / 256, addr_net % 256, addr_node);
167 syslog (LOG_INFO, "registering %s (uid %d) on %u.%u as %s",
168 pwd->pw_name, pwd->pw_uid, addr_net, addr_node, nodename);
170 if (stat(nodename, &stat_buf) == 0) { /* file exists */
171 if (S_ISREG(stat_buf.st_mode)) { /* normal file */
173 fp = fopen(nodename, "w");
174 fprintf(fp, "%s\n", pwd->pw_name);
176 chown( nodename, pwd->pw_uid, -1 );
177 } else { /* somebody is messing with us */
178 syslog( LOG_ERR, "print authfile %s is not a normal file, it will not be modified", nodename );
180 } else { /* file 'nodename' does not exist */
181 fp = fopen(nodename, "w");
182 fprintf(fp, "%s\n", pwd->pw_name);
184 chown( nodename, pwd->pw_uid, -1 );
186 } /* if (addr_net && addr_node ) */
187 } /* if (options->authprintdir) */
188 } /* if (obj->proto == AFPPROTO_ASP) */
190 if (initgroups( pwd->pw_name, pwd->pw_gid ) < 0) {
192 syslog(LOG_INFO, "running with uid %d", geteuid());
194 syslog(LOG_ERR, "login: %m");
195 return AFPERR_BADUAM;
200 /* Basically if the user is in the admin group, we stay root */
202 if (( ngroups = getgroups( NGROUPS, groups )) < 0 ) {
203 syslog( LOG_ERR, "login: getgroups: %m" );
204 return AFPERR_BADUAM;
208 syslog(LOG_INFO, "obj->options.admingid == %d", obj->options.admingid);
210 if (obj->options.admingid != 0) {
212 for (i = 0; i < ngroups; i++) {
213 if (groups[i] == obj->options.admingid) admin = 1;
216 if (admin) syslog( LOG_INFO, "admin login -- %s", pwd->pw_name );
219 if (setegid( pwd->pw_gid ) < 0 || seteuid( pwd->pw_uid ) < 0) {
220 syslog( LOG_ERR, "login: %m" );
221 return AFPERR_BADUAM;
224 /* There's probably a better way to do this, but for now, we just
233 afp_switch = postauth_switch;
234 obj->logout = logout;
239 int afp_login(obj, ibuf, ibuflen, rbuf, rbuflen )
242 int ibuflen, *rbuflen;
244 struct passwd *pwd = NULL;
250 return send_reply(obj, AFPERR_SHUTDOWN );
253 len = (unsigned char) *ibuf++;
254 num = sizeof( afp_versions ) / sizeof( afp_versions[ 0 ]);
255 for ( i = 0; i < num; i++ ) {
256 if ( strncmp( ibuf, afp_versions[ i ].av_name , len ) == 0 ) {
257 afp_version = afp_versions[ i ].av_number;
261 if ( i == num ) /* An inappropo version */
262 return send_reply(obj, AFPERR_BADVERS );
265 len = (unsigned char) *ibuf++;
266 if ((afp_uam = auth_uamfind(UAM_SERVER_LOGIN, ibuf, len)) == NULL)
267 return send_reply(obj, AFPERR_BADUAM);
270 i = afp_uam->u.uam_login.login(obj, &pwd, ibuf, ibuflen, rbuf, rbuflen);
272 return send_reply(obj, i);
274 return send_reply(obj, login(obj, pwd, afp_uam->u.uam_login.logout));
278 int afp_logincont(obj, ibuf, ibuflen, rbuf, rbuflen)
281 int ibuflen, *rbuflen;
283 struct passwd *pwd = NULL;
286 if ( afp_uam == NULL || afp_uam->u.uam_login.logincont == NULL ) {
288 return send_reply(obj, AFPERR_NOTAUTH );
292 err = afp_uam->u.uam_login.logincont(obj, &pwd, ibuf, ibuflen,
295 return send_reply(obj, err);
297 return send_reply(obj, login(obj, pwd, afp_uam->u.uam_login.logout));
301 int afp_logout(obj, ibuf, ibuflen, rbuf, rbuflen)
304 int ibuflen, *rbuflen;
306 syslog(LOG_INFO, "logout %s", obj->username);
313 /* change password --
314 * NOTE: an FPLogin must already have completed successfully for this
315 * to work. this also does a little pre-processing before it hands
318 int afp_changepw(obj, ibuf, ibuflen, rbuf, rbuflen )
321 int ibuflen, *rbuflen;
323 char username[MACFILELEN + 1], *start = ibuf;
331 /* make sure we can deal w/ this uam */
332 len = (unsigned char) *ibuf++;
333 if ((uam = auth_uamfind(UAM_SERVER_CHANGEPW, ibuf, len)) == NULL)
334 return AFPERR_BADUAM;
337 if ((len + 1) & 1) /* pad byte */
340 len = (unsigned char) *ibuf++;
341 if ( len > sizeof(username) - 1) {
344 memcpy(username, ibuf, len);
345 username[ len ] = '\0';
347 if ((len + 1) & 1) /* pad byte */
350 syslog(LOG_INFO, "changing password for <%s>", username);
352 if (( pwd = uam_getname( username, sizeof(username))) == NULL )
355 /* send it off to the uam. we really don't use ibuflen right now. */
356 ibuflen -= (ibuf - start);
357 len = uam->u.uam_changepw(obj, username, pwd, ibuf, ibuflen,
359 syslog(LOG_INFO, "password change %s.",
360 (len == AFPERR_AUTHCONT) ? "continued" :
361 (len ? "failed" : "succeeded"));
367 int afp_getuserinfo(obj, ibuf, ibuflen, rbuf, rbuflen )
370 int ibuflen, *rbuflen;
379 ibuf += sizeof(id); /* userid is not used in AFP 2.0 */
380 memcpy(&bitmap, ibuf, sizeof(bitmap));
381 bitmap = ntohs(bitmap);
383 /* deal with error cases. we don't have to worry about
384 * AFPERR_ACCESS or AFPERR_NOITEM as geteuid and getegid always
388 if ((bitmap & USERIBIT_ALL) != bitmap)
389 return AFPERR_BITMAP;
391 /* copy the bitmap back to reply buffer */
392 memcpy(rbuf, ibuf, sizeof(bitmap));
393 rbuf += sizeof(bitmap);
394 *rbuflen = sizeof(bitmap);
396 /* copy the user/group info */
397 if (bitmap & USERIBIT_USER) {
398 id = htonl(geteuid());
399 memcpy(rbuf, &id, sizeof(id));
401 *rbuflen += sizeof(id);
404 if (bitmap & USERIBIT_GROUP) {
405 id = htonl(getegid());
406 memcpy(rbuf, &id, sizeof(id));
408 *rbuflen += sizeof(id);
414 #define UAM_LIST(type) (((type) == UAM_SERVER_LOGIN) ? &uam_login : \
415 (((type) == UAM_SERVER_CHANGEPW) ? \
416 &uam_changepw : NULL))
418 /* just do a linked list search. this could be sped up with a hashed
419 * list, but i doubt anyone's going to have enough uams to matter. */
420 struct uam_obj *auth_uamfind(const int type, const char *name,
423 struct uam_obj *prev, *start;
425 if (!name || !(start = UAM_LIST(type)))
429 while ((prev = prev->uam_prev) != start)
430 if (strndiacasecmp(prev->uam_name, name, len) == 0)
436 int auth_register(const int type, struct uam_obj *uam)
438 struct uam_obj *start;
440 if (!uam || !uam->uam_name || (*uam->uam_name == '\0'))
443 if (!(start = UAM_LIST(type)))
444 return 0; /* silently fail */
446 uam_attach(start, uam);
450 /* load all of the modules */
451 int auth_load(const char *path, const char *list)
453 char name[MAXPATHLEN + 1], buf[MAXPATHLEN + 1], *p;
458 if (!path || !list || (len = strlen(path)) > sizeof(name) - 2)
461 strncpy(buf, list, sizeof(buf));
462 if ((p = strtok(buf, ",")) == NULL)
466 if (name[len - 1] != '/') {
472 strncpy(name + len, p, sizeof(name) - len);
473 syslog(LOG_DEBUG, "uam : Loading (%s)", name);
475 if ((stat(name, &st) == 0) && (mod = uam_load(name, p))) {
477 if (stat(name, &st) == 0) {
478 if ((mod = uam_load(name, p))) {
479 uam_attach(&uam_modules, mod);
480 syslog(LOG_INFO, "uam: %s loaded", p);
482 syslog(LOG_INFO, "uam: %s load failure",p);
485 syslog(LOG_INFO, "uam: uam not found (status=%d)", stat(name, &st));
487 p = strtok(NULL, ",");
493 /* get rid of all of the uams */
496 struct uam_mod *mod, *prev, *start = &uam_modules;
498 prev = start->uam_prev;
499 while ((mod = prev) != start) {
500 prev = prev->uam_prev;