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))
151 if ( pwd->pw_uid == 0 ) { /* don't allow root login */
152 syslog( LOG_ERR, "login: root login denied!" );
153 return AFPERR_NOTAUTH;
156 syslog( LOG_INFO, "login %s (uid %d, gid %d)", pwd->pw_name,
157 pwd->pw_uid, pwd->pw_gid );
160 if(addr_net && addr_node) { /* Do we have a valid Appletalk address? */
161 addr_uid = pwd->pw_uid;
162 strncpy(addr_name, pwd->pw_name, 32);
163 sprintf(nodename, "%s/net%d.%dnode%d", CAPDIR, addr_net / 256, addr_net % 256, addr_node);
164 syslog (LOG_INFO, "registering %s (uid %d) on %u.%u as %s",
165 addr_name, addr_uid, addr_net, addr_node, nodename);
166 fp = fopen(nodename, "w");
167 fprintf(fp, "%s\n", addr_name);
172 if (initgroups( pwd->pw_name, pwd->pw_gid ) < 0) {
174 syslog(LOG_INFO, "running with uid %d", geteuid());
176 syslog(LOG_ERR, "login: %m");
177 return AFPERR_BADUAM;
180 if ((grps = getgrnam(ADMIN_GRP)) != NULL) {
181 while (*(grps->gr_mem) != NULL) {
182 if (strcmp(pwd->pw_name, *grps->gr_mem) == 0) {
183 syslog(LOG_INFO, "User %s has admin privs, logging in as superuser.",
185 pwd->pw_gid = grps->gr_gid;
187 strcpy (pwd->pw_name, "root");
197 if (setegid( pwd->pw_gid ) < 0 || seteuid( pwd->pw_uid ) < 0) {
198 syslog( LOG_ERR, "login: %m" );
199 return AFPERR_BADUAM;
202 if (( ngroups = getgroups( NGROUPS, groups )) < 0 ) {
203 syslog( LOG_ERR, "login: getgroups: %m" );
204 return AFPERR_BADUAM;
208 afp_switch = postauth_switch;
209 obj->logout = logout;
213 int afp_login(obj, ibuf, ibuflen, rbuf, rbuflen )
216 int ibuflen, *rbuflen;
218 struct passwd *pwd = NULL;
224 return send_reply(obj, AFPERR_SHUTDOWN );
227 len = (unsigned char) *ibuf++;
228 num = sizeof( afp_versions ) / sizeof( afp_versions[ 0 ]);
229 for ( i = 0; i < num; i++ ) {
230 if ( strncmp( ibuf, afp_versions[ i ].av_name , len ) == 0 ) {
231 afp_version = afp_versions[ i ].av_number;
235 if ( i == num ) /* An inappropo version */
236 return send_reply(obj, AFPERR_BADVERS );
239 len = (unsigned char) *ibuf++;
240 if ((afp_uam = auth_uamfind(UAM_SERVER_LOGIN, ibuf, len)) == NULL)
241 return send_reply(obj, AFPERR_BADUAM);
244 i = afp_uam->u.uam_login.login(obj, &pwd, ibuf, ibuflen, rbuf, rbuflen);
246 return send_reply(obj, i);
248 return send_reply(obj, login(obj, pwd, afp_uam->u.uam_login.logout));
252 int afp_logincont(obj, ibuf, ibuflen, rbuf, rbuflen)
255 int ibuflen, *rbuflen;
257 struct passwd *pwd = NULL;
260 if ( afp_uam == NULL || afp_uam->u.uam_login.logincont == NULL ) {
262 return send_reply(obj, AFPERR_NOTAUTH );
266 err = afp_uam->u.uam_login.logincont(obj, &pwd, ibuf, ibuflen,
269 return send_reply(obj, err);
271 return send_reply(obj, login(obj, pwd, afp_uam->u.uam_login.logout));
275 int afp_logout(obj, ibuf, ibuflen, rbuf, rbuflen)
278 int ibuflen, *rbuflen;
280 syslog(LOG_INFO, "logout %s", obj->username);
286 /* change password --
287 * NOTE: an FPLogin must already have completed successfully for this
288 * to work. this also does a little pre-processing before it hands
291 int afp_changepw(obj, ibuf, ibuflen, rbuf, rbuflen )
294 int ibuflen, *rbuflen;
296 char username[MACFILELEN + 1], *start = ibuf;
304 /* make sure we can deal w/ this uam */
305 len = (unsigned char) *ibuf++;
306 if ((uam = auth_uamfind(UAM_SERVER_CHANGEPW, ibuf, len)) == NULL)
307 return AFPERR_BADUAM;
310 if ((len + 1) & 1) /* pad byte */
313 len = (unsigned char) *ibuf++;
314 if ( len > sizeof(username) - 1) {
317 memcpy(username, ibuf, len);
318 username[ len ] = '\0';
320 if ((len + 1) & 1) /* pad byte */
323 syslog(LOG_INFO, "changing password for <%s>", username);
325 if (( pwd = uam_getname( username, sizeof(username))) == NULL )
328 /* send it off to the uam. we really don't use ibuflen right now. */
329 ibuflen -= (ibuf - start);
330 len = uam->u.uam_changepw(obj, username, pwd, ibuf, ibuflen,
332 syslog(LOG_INFO, "password change %s.",
333 (len == AFPERR_AUTHCONT) ? "continued" :
334 (len ? "failed" : "succeeded"));
340 int afp_getuserinfo(obj, ibuf, ibuflen, rbuf, rbuflen )
343 int ibuflen, *rbuflen;
352 ibuf += sizeof(id); /* userid is not used in AFP 2.0 */
353 memcpy(&bitmap, ibuf, sizeof(bitmap));
354 bitmap = ntohs(bitmap);
356 /* deal with error cases. we don't have to worry about
357 * AFPERR_ACCESS or AFPERR_NOITEM as geteuid and getegid always
361 if ((bitmap & USERIBIT_ALL) != bitmap)
362 return AFPERR_BITMAP;
364 /* copy the bitmap back to reply buffer */
365 memcpy(rbuf, ibuf, sizeof(bitmap));
366 rbuf += sizeof(bitmap);
367 *rbuflen = sizeof(bitmap);
369 /* copy the user/group info */
370 if (bitmap & USERIBIT_USER) {
371 id = htonl(geteuid());
372 memcpy(rbuf, &id, sizeof(id));
374 *rbuflen += sizeof(id);
377 if (bitmap & USERIBIT_GROUP) {
378 id = htonl(getegid());
379 memcpy(rbuf, &id, sizeof(id));
381 *rbuflen += sizeof(id);
387 #define UAM_LIST(type) (((type) == UAM_SERVER_LOGIN) ? &uam_login : \
388 (((type) == UAM_SERVER_CHANGEPW) ? \
389 &uam_changepw : NULL))
391 /* just do a linked list search. this could be sped up with a hashed
392 * list, but i doubt anyone's going to have enough uams to matter. */
393 struct uam_obj *auth_uamfind(const int type, const char *name,
396 struct uam_obj *prev, *start;
398 if (!name || !(start = UAM_LIST(type)))
402 while ((prev = prev->uam_prev) != start)
403 if (strndiacasecmp(prev->uam_name, name, len) == 0)
409 int auth_register(const int type, struct uam_obj *uam)
411 struct uam_obj *start;
413 if (!uam || !uam->uam_name || (*uam->uam_name == '\0'))
416 if (!(start = UAM_LIST(type)))
417 return 0; /* silently fail */
419 uam_attach(start, uam);
423 /* load all of the modules */
424 int auth_load(const char *path, const char *list)
426 char name[MAXPATHLEN + 1], buf[MAXPATHLEN + 1], *p;
431 if (!path || !list || (len = strlen(path)) > sizeof(name) - 2)
434 strncpy(buf, list, sizeof(buf));
435 if ((p = strtok(buf, ",")) == NULL)
439 if (name[len - 1] != '/') {
445 strncpy(name + len, p, sizeof(name) - len);
446 if ((stat(name, &st) == 0) && (mod = uam_load(name, p))) {
447 uam_attach(&uam_modules, mod);
448 syslog(LOG_INFO, "uam: %s loaded", p);
450 p = strtok(NULL, ",");
454 /* get rid of all of the uams */
457 struct uam_mod *mod, *prev, *start = &uam_modules;
459 prev = start->uam_prev;
460 while ((mod = prev) != start) {
461 prev = prev->uam_prev;