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 /* Variables for CAP style printer authentication */
74 extern int addr_net, addr_node, addr_uid;
75 extern char addr_name[32];
78 void status_versions( data )
85 memcpy(&status, start + AFPSTATUS_VERSOFF, sizeof(status));
86 num = sizeof( afp_versions ) / sizeof( afp_versions[ 0 ] );
87 data += ntohs( status );
89 for ( i = 0; i < num; i++ ) {
90 len = strlen( afp_versions[ i ].av_name );
92 memcpy( data, afp_versions[ i ].av_name , len );
95 status = htons( data - start );
96 memcpy(start + AFPSTATUS_UAMSOFF, &status, sizeof(status));
99 void status_uams(char *data, const char *authlist)
103 struct uam_obj *uams;
106 memcpy(&status, start + AFPSTATUS_UAMSOFF, sizeof(status));
108 while ((uams = uams->uam_prev) != &uam_login) {
109 if (strstr(authlist, uams->uam_path))
113 data += ntohs( status );
115 while ((uams = uams->uam_prev) != &uam_login) {
116 if (strstr(authlist, uams->uam_path)) {
117 syslog(LOG_INFO, "uam: \"%s\" available", uams->uam_name);
118 len = strlen( uams->uam_name);
120 memcpy( data, uams->uam_name, len );
126 status = htons(data - start);
127 memcpy(start + AFPSTATUS_ICONOFF, &status, sizeof(status));
130 /* handle errors by closing the connection. this is only needed
131 * by the afp_* functions. */
132 static int send_reply(const AFPObj *obj, const int err)
134 if ((err == AFP_OK) || (err == AFPERR_AUTHCONT))
137 obj->reply(obj->handle, err);
141 static int login(AFPObj *obj, struct passwd *pwd, void (*logout)(void))
149 struct afp_options *options = &obj->options;
152 /* UAM had syslog control; afpd needs to reassert itself */
153 openlog( "afpd", LOG_NDELAY|LOG_PID, LOG_DAEMON);
155 if ( pwd->pw_uid == 0 ) { /* don't allow root login */
156 syslog( LOG_ERR, "login: root login denied!" );
157 return AFPERR_NOTAUTH;
160 syslog( LOG_INFO, "login %s (uid %d, gid %d)", pwd->pw_name,
161 pwd->pw_uid, pwd->pw_gid );
164 if(addr_net && addr_node) { /* Do we have a valid Appletalk address? */
165 addr_uid = pwd->pw_uid;
166 strncpy(addr_name, pwd->pw_name, 32);
167 sprintf(nodename, "%s/net%d.%dnode%d", CAPDIR, addr_net / 256, addr_net % 256, addr_node);
168 syslog (LOG_INFO, "registering %s (uid %d) on %u.%u as %s",
169 addr_name, addr_uid, addr_net, addr_node, nodename);
170 fp = fopen(nodename, "w");
171 fprintf(fp, "%s\n", addr_name);
176 if (initgroups( pwd->pw_name, pwd->pw_gid ) < 0) {
178 syslog(LOG_INFO, "running with uid %d", geteuid());
180 syslog(LOG_ERR, "login: %m");
181 return AFPERR_BADUAM;
186 /* Basically if the user is in the admin group, we stay root */
188 if (( ngroups = getgroups( NGROUPS, groups )) < 0 ) {
189 syslog( LOG_ERR, "login: getgroups: %m" );
190 return AFPERR_BADUAM;
194 syslog(LOG_INFO, "options->admingid == %d", options->admingid);
196 if (options->admingid != 0) {
198 for (i = 0; i < ngroups; i++) {
199 if (groups[i] == options->admingid) admin = 1;
202 if (admin) syslog( LOG_INFO, "admin login -- %s", pwd->pw_name );
205 if (setegid( pwd->pw_gid ) < 0 || seteuid( pwd->pw_uid ) < 0) {
206 syslog( LOG_ERR, "login: %m" );
207 return AFPERR_BADUAM;
210 /* There's probably a better way to do this, but for now, we just
219 afp_switch = postauth_switch;
220 obj->logout = logout;
225 int afp_login(obj, ibuf, ibuflen, rbuf, rbuflen )
228 int ibuflen, *rbuflen;
230 struct passwd *pwd = NULL;
236 return send_reply(obj, AFPERR_SHUTDOWN );
239 len = (unsigned char) *ibuf++;
240 num = sizeof( afp_versions ) / sizeof( afp_versions[ 0 ]);
241 for ( i = 0; i < num; i++ ) {
242 if ( strncmp( ibuf, afp_versions[ i ].av_name , len ) == 0 ) {
243 afp_version = afp_versions[ i ].av_number;
247 if ( i == num ) /* An inappropo version */
248 return send_reply(obj, AFPERR_BADVERS );
251 len = (unsigned char) *ibuf++;
252 if ((afp_uam = auth_uamfind(UAM_SERVER_LOGIN, ibuf, len)) == NULL)
253 return send_reply(obj, AFPERR_BADUAM);
256 i = afp_uam->u.uam_login.login(obj, &pwd, ibuf, ibuflen, rbuf, rbuflen);
258 return send_reply(obj, i);
260 return send_reply(obj, login(obj, pwd, afp_uam->u.uam_login.logout));
264 int afp_logincont(obj, ibuf, ibuflen, rbuf, rbuflen)
267 int ibuflen, *rbuflen;
269 struct passwd *pwd = NULL;
272 if ( afp_uam == NULL || afp_uam->u.uam_login.logincont == NULL ) {
274 return send_reply(obj, AFPERR_NOTAUTH );
278 err = afp_uam->u.uam_login.logincont(obj, &pwd, ibuf, ibuflen,
281 return send_reply(obj, err);
283 return send_reply(obj, login(obj, pwd, afp_uam->u.uam_login.logout));
287 int afp_logout(obj, ibuf, ibuflen, rbuf, rbuflen)
290 int ibuflen, *rbuflen;
292 syslog(LOG_INFO, "logout %s", obj->username);
298 /* change password --
299 * NOTE: an FPLogin must already have completed successfully for this
300 * to work. this also does a little pre-processing before it hands
303 int afp_changepw(obj, ibuf, ibuflen, rbuf, rbuflen )
306 int ibuflen, *rbuflen;
308 char username[MACFILELEN + 1], *start = ibuf;
316 /* make sure we can deal w/ this uam */
317 len = (unsigned char) *ibuf++;
318 if ((uam = auth_uamfind(UAM_SERVER_CHANGEPW, ibuf, len)) == NULL)
319 return AFPERR_BADUAM;
322 if ((len + 1) & 1) /* pad byte */
325 len = (unsigned char) *ibuf++;
326 if ( len > sizeof(username) - 1) {
329 memcpy(username, ibuf, len);
330 username[ len ] = '\0';
332 if ((len + 1) & 1) /* pad byte */
335 syslog(LOG_INFO, "changing password for <%s>", username);
337 if (( pwd = uam_getname( username, sizeof(username))) == NULL )
340 /* send it off to the uam. we really don't use ibuflen right now. */
341 ibuflen -= (ibuf - start);
342 len = uam->u.uam_changepw(obj, username, pwd, ibuf, ibuflen,
344 syslog(LOG_INFO, "password change %s.",
345 (len == AFPERR_AUTHCONT) ? "continued" :
346 (len ? "failed" : "succeeded"));
352 int afp_getuserinfo(obj, ibuf, ibuflen, rbuf, rbuflen )
355 int ibuflen, *rbuflen;
364 ibuf += sizeof(id); /* userid is not used in AFP 2.0 */
365 memcpy(&bitmap, ibuf, sizeof(bitmap));
366 bitmap = ntohs(bitmap);
368 /* deal with error cases. we don't have to worry about
369 * AFPERR_ACCESS or AFPERR_NOITEM as geteuid and getegid always
373 if ((bitmap & USERIBIT_ALL) != bitmap)
374 return AFPERR_BITMAP;
376 /* copy the bitmap back to reply buffer */
377 memcpy(rbuf, ibuf, sizeof(bitmap));
378 rbuf += sizeof(bitmap);
379 *rbuflen = sizeof(bitmap);
381 /* copy the user/group info */
382 if (bitmap & USERIBIT_USER) {
383 id = htonl(geteuid());
384 memcpy(rbuf, &id, sizeof(id));
386 *rbuflen += sizeof(id);
389 if (bitmap & USERIBIT_GROUP) {
390 id = htonl(getegid());
391 memcpy(rbuf, &id, sizeof(id));
393 *rbuflen += sizeof(id);
399 #define UAM_LIST(type) (((type) == UAM_SERVER_LOGIN) ? &uam_login : \
400 (((type) == UAM_SERVER_CHANGEPW) ? \
401 &uam_changepw : NULL))
403 /* just do a linked list search. this could be sped up with a hashed
404 * list, but i doubt anyone's going to have enough uams to matter. */
405 struct uam_obj *auth_uamfind(const int type, const char *name,
408 struct uam_obj *prev, *start;
410 if (!name || !(start = UAM_LIST(type)))
414 while ((prev = prev->uam_prev) != start)
415 if (strndiacasecmp(prev->uam_name, name, len) == 0)
421 int auth_register(const int type, struct uam_obj *uam)
423 struct uam_obj *start;
425 if (!uam || !uam->uam_name || (*uam->uam_name == '\0'))
428 if (!(start = UAM_LIST(type)))
429 return 0; /* silently fail */
431 uam_attach(start, uam);
435 /* load all of the modules */
436 int auth_load(const char *path, const char *list)
438 char name[MAXPATHLEN + 1], buf[MAXPATHLEN + 1], *p;
443 if (!path || !list || (len = strlen(path)) > sizeof(name) - 2)
446 strncpy(buf, list, sizeof(buf));
447 if ((p = strtok(buf, ",")) == NULL)
451 if (name[len - 1] != '/') {
457 strncpy(name + len, p, sizeof(name) - len);
458 if ((stat(name, &st) == 0) && (mod = uam_load(name, p))) {
459 uam_attach(&uam_modules, mod);
460 syslog(LOG_INFO, "uam: %s loaded", p);
462 p = strtok(NULL, ",");
466 /* get rid of all of the uams */
469 struct uam_mod *mod, *prev, *start = &uam_modules;
471 prev = start->uam_prev;
472 while ((mod = prev) != start) {
473 prev = prev->uam_prev;