2 * Copyright (c) 1990,1993 Regents of The University of Michigan.
3 * All Rights Reserved. See COPYRIGHT.
10 #include <sys/param.h>
12 #include <netatalk/endian.h>
13 #include <atalk/afp.h>
14 #include <atalk/compat.h>
15 #include <atalk/util.h>
31 #if defined( __svr4__ ) && !defined( NGROUPS )
32 #define NGROUPS NGROUPS_MAX
33 #endif __svr4__ NGROUPS
34 #if defined( sun ) && !defined( __svr4__ ) || defined( ultrix )
35 int groups[ NGROUPS ];
36 #else sun __svr4__ ultrix
37 #if defined( __svr4__ ) && !defined( NGROUPS )
38 #define NGROUPS NGROUPS_MAX
39 #endif __svr4__ NGROUPS
40 gid_t groups[ NGROUPS ];
45 * These numbers are scattered throughout the code.
47 static struct afp_versions afp_versions[] = {
48 { "AFPVersion 1.1", 11 },
49 { "AFPVersion 2.0", 20 },
50 { "AFPVersion 2.1", 21 },
54 static struct uam_mod uam_modules = {NULL, NULL, &uam_modules, &uam_modules};
55 static struct uam_obj uam_login = {"", "", 0, {{NULL}}, &uam_login,
57 static struct uam_obj uam_changepw = {"", "", 0, {{NULL}}, &uam_changepw,
60 static struct uam_obj *afp_uam = NULL;
63 /* Variables for CAP style printer authentication */
65 extern int addr_net, addr_node, addr_uid;
66 extern char addr_name[32];
69 void status_versions( data )
76 memcpy(&status, start + AFPSTATUS_VERSOFF, sizeof(status));
77 num = sizeof( afp_versions ) / sizeof( afp_versions[ 0 ] );
78 data += ntohs( status );
80 for ( i = 0; i < num; i++ ) {
81 len = strlen( afp_versions[ i ].av_name );
83 memcpy( data, afp_versions[ i ].av_name , len );
86 status = htons( data - start );
87 memcpy(start + AFPSTATUS_UAMSOFF, &status, sizeof(status));
90 void status_uams(char *data, const char *authlist)
97 memcpy(&status, start + AFPSTATUS_UAMSOFF, sizeof(status));
99 while ((uams = uams->uam_prev) != &uam_login) {
100 if (strstr(authlist, uams->uam_path))
104 data += ntohs( status );
106 while ((uams = uams->uam_prev) != &uam_login) {
107 if (strstr(authlist, uams->uam_path)) {
108 syslog(LOG_INFO, "uam: \"%s\" available", uams->uam_name);
109 len = strlen( uams->uam_name);
111 memcpy( data, uams->uam_name, len );
117 status = htons(data - start);
118 memcpy(start + AFPSTATUS_ICONOFF, &status, sizeof(status));
121 /* handle errors by closing the connection. this is only needed
122 * by the afp_* functions. */
123 static int send_reply(const AFPObj *obj, const int err)
125 if ((err == AFP_OK) || (err == AFPERR_AUTHCONT))
128 obj->reply(obj->handle, err);
132 static int login(AFPObj *obj, struct passwd *pwd, void (*logout)(void))
139 if ( pwd->pw_uid == 0 ) { /* don't allow root login */
140 syslog( LOG_ERR, "login: root login denied!" );
141 return AFPERR_NOTAUTH;
144 syslog( LOG_INFO, "login %s (uid %d, gid %d)", pwd->pw_name,
145 pwd->pw_uid, pwd->pw_gid );
148 if(addr_net && addr_node) { /* Do we have a valid Appletalk address? */
149 addr_uid = pwd->pw_uid;
150 strncpy(addr_name, pwd->pw_name, 32);
151 sprintf(nodename, "%s/net%d.%dnode%d", CAPDIR, addr_net / 256, addr_net % 256, addr_node);
152 syslog (LOG_INFO, "registering %s (uid %d) on %u.%u as %s",
153 addr_name, addr_uid, addr_net, addr_node, nodename);
154 fp = fopen(nodename, "w");
155 fprintf(fp, "%s\n", addr_name);
160 if (initgroups( pwd->pw_name, pwd->pw_gid ) < 0) {
162 syslog(LOG_INFO, "running with uid %d", geteuid());
164 syslog(LOG_ERR, "login: %m");
165 return AFPERR_BADUAM;
169 if (setegid( pwd->pw_gid ) < 0 || seteuid( pwd->pw_uid ) < 0) {
170 syslog( LOG_ERR, "login: %m" );
171 return AFPERR_BADUAM;
174 if (( ngroups = getgroups( NGROUPS, groups )) < 0 ) {
175 syslog( LOG_ERR, "login: getgroups: %m" );
176 return AFPERR_BADUAM;
180 afp_switch = postauth_switch;
181 obj->logout = logout;
185 int afp_login(obj, ibuf, ibuflen, rbuf, rbuflen )
188 int ibuflen, *rbuflen;
190 struct passwd *pwd = NULL;
196 return send_reply(obj, AFPERR_SHUTDOWN );
199 len = (unsigned char) *ibuf++;
200 num = sizeof( afp_versions ) / sizeof( afp_versions[ 0 ]);
201 for ( i = 0; i < num; i++ ) {
202 if ( strncmp( ibuf, afp_versions[ i ].av_name , len ) == 0 ) {
203 afp_version = afp_versions[ i ].av_number;
207 if ( i == num ) /* An inappropo version */
208 return send_reply(obj, AFPERR_BADVERS );
211 len = (unsigned char) *ibuf++;
212 if ((afp_uam = auth_uamfind(UAM_SERVER_LOGIN, ibuf, len)) == NULL)
213 return send_reply(obj, AFPERR_BADUAM);
216 i = afp_uam->u.uam_login.login(obj, &pwd, ibuf, ibuflen, rbuf, rbuflen);
218 return send_reply(obj, i);
220 return send_reply(obj, login(obj, pwd, afp_uam->u.uam_login.logout));
224 int afp_logincont(obj, ibuf, ibuflen, rbuf, rbuflen)
227 int ibuflen, *rbuflen;
229 struct passwd *pwd = NULL;
232 if ( afp_uam == NULL || afp_uam->u.uam_login.logincont == NULL ) {
234 return send_reply(obj, AFPERR_NOTAUTH );
238 err = afp_uam->u.uam_login.logincont(obj, &pwd, ibuf, ibuflen,
241 return send_reply(obj, err);
243 return send_reply(obj, login(obj, pwd, afp_uam->u.uam_login.logout));
247 int afp_logout(obj, ibuf, ibuflen, rbuf, rbuflen)
250 int ibuflen, *rbuflen;
252 syslog(LOG_INFO, "logout %s", obj->username);
258 /* change password --
259 * NOTE: an FPLogin must already have completed successfully for this
260 * to work. this also does a little pre-processing before it hands
263 int afp_changepw(obj, ibuf, ibuflen, rbuf, rbuflen )
266 int ibuflen, *rbuflen;
268 char username[MACFILELEN + 1], *start = ibuf;
276 /* make sure we can deal w/ this uam */
277 len = (unsigned char) *ibuf++;
278 if ((uam = auth_uamfind(UAM_SERVER_CHANGEPW, ibuf, len)) == NULL)
279 return AFPERR_BADUAM;
282 if ((len + 1) & 1) /* pad byte */
285 len = (unsigned char) *ibuf++;
286 if ( len > sizeof(username) - 1) {
289 memcpy(username, ibuf, len);
290 username[ len ] = '\0';
292 if ((len + 1) & 1) /* pad byte */
295 syslog(LOG_INFO, "changing password for <%s>", username);
297 if (( pwd = uam_getname( username, sizeof(username))) == NULL )
300 /* send it off to the uam. we really don't use ibuflen right now. */
301 ibuflen -= (ibuf - start);
302 len = uam->u.uam_changepw(obj, username, pwd, ibuf, ibuflen,
304 syslog(LOG_INFO, "password change %s.",
305 (len == AFPERR_AUTHCONT) ? "continued" :
306 (len ? "failed" : "succeeded"));
312 int afp_getuserinfo(obj, ibuf, ibuflen, rbuf, rbuflen )
315 int ibuflen, *rbuflen;
324 ibuf += sizeof(id); /* userid is not used in AFP 2.0 */
325 memcpy(&bitmap, ibuf, sizeof(bitmap));
326 bitmap = ntohs(bitmap);
328 /* deal with error cases. we don't have to worry about
329 * AFPERR_ACCESS or AFPERR_NOITEM as geteuid and getegid always
333 if ((bitmap & USERIBIT_ALL) != bitmap)
334 return AFPERR_BITMAP;
336 /* copy the bitmap back to reply buffer */
337 memcpy(rbuf, ibuf, sizeof(bitmap));
338 rbuf += sizeof(bitmap);
339 *rbuflen = sizeof(bitmap);
341 /* copy the user/group info */
342 if (bitmap & USERIBIT_USER) {
343 id = htonl(geteuid());
344 memcpy(rbuf, &id, sizeof(id));
346 *rbuflen += sizeof(id);
349 if (bitmap & USERIBIT_GROUP) {
350 id = htonl(getegid());
351 memcpy(rbuf, &id, sizeof(id));
353 *rbuflen += sizeof(id);
359 #define UAM_LIST(type) (((type) == UAM_SERVER_LOGIN) ? &uam_login : \
360 (((type) == UAM_SERVER_CHANGEPW) ? \
361 &uam_changepw : NULL))
363 /* just do a linked list search. this could be sped up with a hashed
364 * list, but i doubt anyone's going to have enough uams to matter. */
365 struct uam_obj *auth_uamfind(const int type, const char *name,
368 struct uam_obj *prev, *start;
370 if (!name || !(start = UAM_LIST(type)))
374 while ((prev = prev->uam_prev) != start)
375 if (strndiacasecmp(prev->uam_name, name, len) == 0)
381 int auth_register(const int type, struct uam_obj *uam)
383 struct uam_obj *start;
385 if (!uam || !uam->uam_name || (*uam->uam_name == '\0'))
388 if (!(start = UAM_LIST(type)))
389 return 0; /* silently fail */
391 uam_attach(start, uam);
395 /* load all of the modules */
396 int auth_load(const char *path, const char *list)
398 char name[MAXPATHLEN + 1], buf[MAXPATHLEN + 1], *p;
403 if (!path || !list || (len = strlen(path)) > sizeof(name) - 2)
406 strncpy(buf, list, sizeof(buf));
407 if ((p = strtok(buf, ",")) == NULL)
411 if (name[len - 1] != '/') {
417 strncpy(name + len, p, sizeof(name) - len);
418 if ((stat(name, &st) == 0) && (mod = uam_load(name, p))) {
419 uam_attach(&uam_modules, mod);
420 syslog(LOG_INFO, "uam: %s loaded", p);
422 p = strtok(NULL, ",");
426 /* get rid of all of the uams */
429 struct uam_mod *mod, *prev, *start = &uam_modules;
431 prev = start->uam_prev;
432 while ((mod = prev) != start) {
433 prev = prev->uam_prev;