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>
36 #if defined( __svr4__ ) && !defined( NGROUPS )
37 #define NGROUPS NGROUPS_MAX
38 #endif __svr4__ NGROUPS
39 #if defined( sun ) && !defined( __svr4__ ) || defined( ultrix )
40 int groups[ NGROUPS ];
41 #else sun __svr4__ ultrix
42 #if defined( __svr4__ ) && !defined( NGROUPS )
43 #define NGROUPS NGROUPS_MAX
44 #endif __svr4__ NGROUPS
45 gid_t groups[ NGROUPS ];
50 * These numbers are scattered throughout the code.
52 static struct afp_versions afp_versions[] = {
53 { "AFPVersion 1.1", 11 },
54 { "AFPVersion 2.0", 20 },
55 { "AFPVersion 2.1", 21 },
59 static struct uam_mod uam_modules = {NULL, NULL, &uam_modules, &uam_modules};
60 static struct uam_obj uam_login = {"", "", 0, {{NULL}}, &uam_login,
62 static struct uam_obj uam_changepw = {"", "", 0, {{NULL}}, &uam_changepw,
65 static struct uam_obj *afp_uam = NULL;
68 /* Variables for CAP style printer authentication */
70 extern int addr_net, addr_node, addr_uid;
71 extern char addr_name[32];
74 void status_versions( data )
81 memcpy(&status, start + AFPSTATUS_VERSOFF, sizeof(status));
82 num = sizeof( afp_versions ) / sizeof( afp_versions[ 0 ] );
83 data += ntohs( status );
85 for ( i = 0; i < num; i++ ) {
86 len = strlen( afp_versions[ i ].av_name );
88 memcpy( data, afp_versions[ i ].av_name , len );
91 status = htons( data - start );
92 memcpy(start + AFPSTATUS_UAMSOFF, &status, sizeof(status));
95 void status_uams(char *data, const char *authlist)
102 memcpy(&status, start + AFPSTATUS_UAMSOFF, sizeof(status));
104 while ((uams = uams->uam_prev) != &uam_login) {
105 if (strstr(authlist, uams->uam_path))
109 data += ntohs( status );
111 while ((uams = uams->uam_prev) != &uam_login) {
112 if (strstr(authlist, uams->uam_path)) {
113 syslog(LOG_INFO, "uam: \"%s\" available", uams->uam_name);
114 len = strlen( uams->uam_name);
116 memcpy( data, uams->uam_name, len );
122 status = htons(data - start);
123 memcpy(start + AFPSTATUS_ICONOFF, &status, sizeof(status));
126 /* handle errors by closing the connection. this is only needed
127 * by the afp_* functions. */
128 static int send_reply(const AFPObj *obj, const int err)
130 if ((err == AFP_OK) || (err == AFPERR_AUTHCONT))
133 obj->reply(obj->handle, err);
137 static int login(AFPObj *obj, struct passwd *pwd, void (*logout)(void))
144 if ( pwd->pw_uid == 0 ) { /* don't allow root login */
145 syslog( LOG_ERR, "login: root login denied!" );
146 return AFPERR_NOTAUTH;
149 syslog( LOG_INFO, "login %s (uid %d, gid %d)", pwd->pw_name,
150 pwd->pw_uid, pwd->pw_gid );
153 if(addr_net && addr_node) { /* Do we have a valid Appletalk address? */
154 addr_uid = pwd->pw_uid;
155 strncpy(addr_name, pwd->pw_name, 32);
156 sprintf(nodename, "%s/net%d.%dnode%d", CAPDIR, addr_net / 256, addr_net % 256, addr_node);
157 syslog (LOG_INFO, "registering %s (uid %d) on %u.%u as %s",
158 addr_name, addr_uid, addr_net, addr_node, nodename);
159 fp = fopen(nodename, "w");
160 fprintf(fp, "%s\n", addr_name);
165 if (initgroups( pwd->pw_name, pwd->pw_gid ) < 0) {
167 syslog(LOG_INFO, "running with uid %d", geteuid());
169 syslog(LOG_ERR, "login: %m");
170 return AFPERR_BADUAM;
174 if (setegid( pwd->pw_gid ) < 0 || seteuid( pwd->pw_uid ) < 0) {
175 syslog( LOG_ERR, "login: %m" );
176 return AFPERR_BADUAM;
179 if (( ngroups = getgroups( NGROUPS, groups )) < 0 ) {
180 syslog( LOG_ERR, "login: getgroups: %m" );
181 return AFPERR_BADUAM;
185 afp_switch = postauth_switch;
186 obj->logout = logout;
190 int afp_login(obj, ibuf, ibuflen, rbuf, rbuflen )
193 int ibuflen, *rbuflen;
195 struct passwd *pwd = NULL;
201 return send_reply(obj, AFPERR_SHUTDOWN );
204 len = (unsigned char) *ibuf++;
205 num = sizeof( afp_versions ) / sizeof( afp_versions[ 0 ]);
206 for ( i = 0; i < num; i++ ) {
207 if ( strncmp( ibuf, afp_versions[ i ].av_name , len ) == 0 ) {
208 afp_version = afp_versions[ i ].av_number;
212 if ( i == num ) /* An inappropo version */
213 return send_reply(obj, AFPERR_BADVERS );
216 len = (unsigned char) *ibuf++;
217 if ((afp_uam = auth_uamfind(UAM_SERVER_LOGIN, ibuf, len)) == NULL)
218 return send_reply(obj, AFPERR_BADUAM);
221 i = afp_uam->u.uam_login.login(obj, &pwd, ibuf, ibuflen, rbuf, rbuflen);
223 return send_reply(obj, i);
225 return send_reply(obj, login(obj, pwd, afp_uam->u.uam_login.logout));
229 int afp_logincont(obj, ibuf, ibuflen, rbuf, rbuflen)
232 int ibuflen, *rbuflen;
234 struct passwd *pwd = NULL;
237 if ( afp_uam == NULL || afp_uam->u.uam_login.logincont == NULL ) {
239 return send_reply(obj, AFPERR_NOTAUTH );
243 err = afp_uam->u.uam_login.logincont(obj, &pwd, ibuf, ibuflen,
246 return send_reply(obj, err);
248 return send_reply(obj, login(obj, pwd, afp_uam->u.uam_login.logout));
252 int afp_logout(obj, ibuf, ibuflen, rbuf, rbuflen)
255 int ibuflen, *rbuflen;
257 syslog(LOG_INFO, "logout %s", obj->username);
263 /* change password --
264 * NOTE: an FPLogin must already have completed successfully for this
265 * to work. this also does a little pre-processing before it hands
268 int afp_changepw(obj, ibuf, ibuflen, rbuf, rbuflen )
271 int ibuflen, *rbuflen;
273 char username[MACFILELEN + 1], *start = ibuf;
281 /* make sure we can deal w/ this uam */
282 len = (unsigned char) *ibuf++;
283 if ((uam = auth_uamfind(UAM_SERVER_CHANGEPW, ibuf, len)) == NULL)
284 return AFPERR_BADUAM;
287 if ((len + 1) & 1) /* pad byte */
290 len = (unsigned char) *ibuf++;
291 if ( len > sizeof(username) - 1) {
294 memcpy(username, ibuf, len);
295 username[ len ] = '\0';
297 if ((len + 1) & 1) /* pad byte */
300 syslog(LOG_INFO, "changing password for <%s>", username);
302 if (( pwd = uam_getname( username, sizeof(username))) == NULL )
305 /* send it off to the uam. we really don't use ibuflen right now. */
306 ibuflen -= (ibuf - start);
307 len = uam->u.uam_changepw(obj, username, pwd, ibuf, ibuflen,
309 syslog(LOG_INFO, "password change %s.",
310 (len == AFPERR_AUTHCONT) ? "continued" :
311 (len ? "failed" : "succeeded"));
317 int afp_getuserinfo(obj, ibuf, ibuflen, rbuf, rbuflen )
320 int ibuflen, *rbuflen;
329 ibuf += sizeof(id); /* userid is not used in AFP 2.0 */
330 memcpy(&bitmap, ibuf, sizeof(bitmap));
331 bitmap = ntohs(bitmap);
333 /* deal with error cases. we don't have to worry about
334 * AFPERR_ACCESS or AFPERR_NOITEM as geteuid and getegid always
338 if ((bitmap & USERIBIT_ALL) != bitmap)
339 return AFPERR_BITMAP;
341 /* copy the bitmap back to reply buffer */
342 memcpy(rbuf, ibuf, sizeof(bitmap));
343 rbuf += sizeof(bitmap);
344 *rbuflen = sizeof(bitmap);
346 /* copy the user/group info */
347 if (bitmap & USERIBIT_USER) {
348 id = htonl(geteuid());
349 memcpy(rbuf, &id, sizeof(id));
351 *rbuflen += sizeof(id);
354 if (bitmap & USERIBIT_GROUP) {
355 id = htonl(getegid());
356 memcpy(rbuf, &id, sizeof(id));
358 *rbuflen += sizeof(id);
364 #define UAM_LIST(type) (((type) == UAM_SERVER_LOGIN) ? &uam_login : \
365 (((type) == UAM_SERVER_CHANGEPW) ? \
366 &uam_changepw : NULL))
368 /* just do a linked list search. this could be sped up with a hashed
369 * list, but i doubt anyone's going to have enough uams to matter. */
370 struct uam_obj *auth_uamfind(const int type, const char *name,
373 struct uam_obj *prev, *start;
375 if (!name || !(start = UAM_LIST(type)))
379 while ((prev = prev->uam_prev) != start)
380 if (strndiacasecmp(prev->uam_name, name, len) == 0)
386 int auth_register(const int type, struct uam_obj *uam)
388 struct uam_obj *start;
390 if (!uam || !uam->uam_name || (*uam->uam_name == '\0'))
393 if (!(start = UAM_LIST(type)))
394 return 0; /* silently fail */
396 uam_attach(start, uam);
400 /* load all of the modules */
401 int auth_load(const char *path, const char *list)
403 char name[MAXPATHLEN + 1], buf[MAXPATHLEN + 1], *p;
408 if (!path || !list || (len = strlen(path)) > sizeof(name) - 2)
411 strncpy(buf, list, sizeof(buf));
412 if ((p = strtok(buf, ",")) == NULL)
416 if (name[len - 1] != '/') {
422 strncpy(name + len, p, sizeof(name) - len);
423 if ((stat(name, &st) == 0) && (mod = uam_load(name, p))) {
424 uam_attach(&uam_modules, mod);
425 syslog(LOG_INFO, "uam: %s loaded", p);
427 p = strtok(NULL, ",");
431 /* get rid of all of the uams */
434 struct uam_mod *mod, *prev, *start = &uam_modules;
436 prev = start->uam_prev;
437 while ((mod = prev) != start) {
438 prev = prev->uam_prev;