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;
62 void status_versions( data )
69 memcpy(&status, start + AFPSTATUS_VERSOFF, sizeof(status));
70 num = sizeof( afp_versions ) / sizeof( afp_versions[ 0 ] );
71 data += ntohs( status );
73 for ( i = 0; i < num; i++ ) {
74 len = strlen( afp_versions[ i ].av_name );
76 memcpy( data, afp_versions[ i ].av_name , len );
79 status = htons( data - start );
80 memcpy(start + AFPSTATUS_UAMSOFF, &status, sizeof(status));
83 void status_uams(char *data, const char *authlist)
90 memcpy(&status, start + AFPSTATUS_UAMSOFF, sizeof(status));
92 while ((uams = uams->uam_prev) != &uam_login) {
93 if (strstr(authlist, uams->uam_path))
97 data += ntohs( status );
99 while ((uams = uams->uam_prev) != &uam_login) {
100 if (strstr(authlist, uams->uam_path)) {
101 syslog(LOG_INFO, "uam: \"%s\" available", uams->uam_name);
102 len = strlen( uams->uam_name);
104 memcpy( data, uams->uam_name, len );
110 status = htons(data - start);
111 memcpy(start + AFPSTATUS_ICONOFF, &status, sizeof(status));
114 /* handle errors by closing the connection. this is only needed
115 * by the afp_* functions. */
116 static int send_reply(const AFPObj *obj, const int err)
118 if ((err == AFP_OK) || (err == AFPERR_AUTHCONT))
121 obj->reply(obj->handle, err);
125 static int login(AFPObj *obj, struct passwd *pwd, void (*logout)(void))
127 if ( pwd->pw_uid == 0 ) { /* don't allow root login */
128 syslog( LOG_ERR, "login: root login denied!" );
129 return AFPERR_NOTAUTH;
132 syslog( LOG_INFO, "login %s (uid %d, gid %d)", pwd->pw_name,
133 pwd->pw_uid, pwd->pw_gid );
134 if (initgroups( pwd->pw_name, pwd->pw_gid ) < 0) {
136 syslog(LOG_INFO, "running with uid %d", geteuid());
138 syslog(LOG_ERR, "login: %m");
139 return AFPERR_BADUAM;
143 if (setegid( pwd->pw_gid ) < 0 || seteuid( pwd->pw_uid ) < 0) {
144 syslog( LOG_ERR, "login: %m" );
145 return AFPERR_BADUAM;
148 if (( ngroups = getgroups( NGROUPS, groups )) < 0 ) {
149 syslog( LOG_ERR, "login: getgroups: %m" );
150 return AFPERR_BADUAM;
154 afp_switch = postauth_switch;
155 obj->logout = logout;
159 int afp_login(obj, ibuf, ibuflen, rbuf, rbuflen )
162 int ibuflen, *rbuflen;
164 struct passwd *pwd = NULL;
170 return send_reply(obj, AFPERR_SHUTDOWN );
173 len = (unsigned char) *ibuf++;
174 num = sizeof( afp_versions ) / sizeof( afp_versions[ 0 ]);
175 for ( i = 0; i < num; i++ ) {
176 if ( strncmp( ibuf, afp_versions[ i ].av_name , len ) == 0 ) {
177 afp_version = afp_versions[ i ].av_number;
181 if ( i == num ) /* An inappropo version */
182 return send_reply(obj, AFPERR_BADVERS );
185 len = (unsigned char) *ibuf++;
186 if ((afp_uam = auth_uamfind(UAM_SERVER_LOGIN, ibuf, len)) == NULL)
187 return send_reply(obj, AFPERR_BADUAM);
190 i = afp_uam->u.uam_login.login(obj, &pwd, ibuf, ibuflen, rbuf, rbuflen);
192 return send_reply(obj, i);
194 return send_reply(obj, login(obj, pwd, afp_uam->u.uam_login.logout));
198 int afp_logincont(obj, ibuf, ibuflen, rbuf, rbuflen)
201 int ibuflen, *rbuflen;
203 struct passwd *pwd = NULL;
206 if ( afp_uam == NULL || afp_uam->u.uam_login.logincont == NULL ) {
208 return send_reply(obj, AFPERR_NOTAUTH );
212 err = afp_uam->u.uam_login.logincont(obj, &pwd, ibuf, ibuflen,
215 return send_reply(obj, err);
217 return send_reply(obj, login(obj, pwd, afp_uam->u.uam_login.logout));
221 int afp_logout(obj, ibuf, ibuflen, rbuf, rbuflen)
224 int ibuflen, *rbuflen;
226 syslog(LOG_INFO, "logout %s", obj->username);
232 /* change password --
233 * NOTE: an FPLogin must already have completed successfully for this
234 * to work. this also does a little pre-processing before it hands
237 int afp_changepw(obj, ibuf, ibuflen, rbuf, rbuflen )
240 int ibuflen, *rbuflen;
242 char username[MACFILELEN + 1], *start = ibuf;
250 /* make sure we can deal w/ this uam */
251 len = (unsigned char) *ibuf++;
252 if ((uam = auth_uamfind(UAM_SERVER_CHANGEPW, ibuf, len)) == NULL)
253 return AFPERR_BADUAM;
256 if ((len + 1) & 1) /* pad byte */
259 len = (unsigned char) *ibuf++;
260 if ( len > sizeof(username) - 1) {
263 memcpy(username, ibuf, len);
264 username[ len ] = '\0';
266 if ((len + 1) & 1) /* pad byte */
269 syslog(LOG_INFO, "changing password for <%s>", username);
271 if (( pwd = uam_getname( username, sizeof(username))) == NULL )
274 /* send it off to the uam. we really don't use ibuflen right now. */
275 ibuflen -= (ibuf - start);
276 len = uam->u.uam_changepw(obj, username, pwd, ibuf, ibuflen,
278 syslog(LOG_INFO, "password change %s.",
279 (len == AFPERR_AUTHCONT) ? "continued" :
280 (len ? "failed" : "succeeded"));
286 int afp_getuserinfo(obj, ibuf, ibuflen, rbuf, rbuflen )
289 int ibuflen, *rbuflen;
298 ibuf += sizeof(id); /* userid is not used in AFP 2.0 */
299 memcpy(&bitmap, ibuf, sizeof(bitmap));
300 bitmap = ntohs(bitmap);
302 /* deal with error cases. we don't have to worry about
303 * AFPERR_ACCESS or AFPERR_NOITEM as geteuid and getegid always
307 if ((bitmap & USERIBIT_ALL) != bitmap)
308 return AFPERR_BITMAP;
310 /* copy the bitmap back to reply buffer */
311 memcpy(rbuf, ibuf, sizeof(bitmap));
312 rbuf += sizeof(bitmap);
313 *rbuflen = sizeof(bitmap);
315 /* copy the user/group info */
316 if (bitmap & USERIBIT_USER) {
317 id = htonl(geteuid());
318 memcpy(rbuf, &id, sizeof(id));
320 *rbuflen += sizeof(id);
323 if (bitmap & USERIBIT_GROUP) {
324 id = htonl(getegid());
325 memcpy(rbuf, &id, sizeof(id));
327 *rbuflen += sizeof(id);
333 #define UAM_LIST(type) (((type) == UAM_SERVER_LOGIN) ? &uam_login : \
334 (((type) == UAM_SERVER_CHANGEPW) ? \
335 &uam_changepw : NULL))
337 /* just do a linked list search. this could be sped up with a hashed
338 * list, but i doubt anyone's going to have enough uams to matter. */
339 struct uam_obj *auth_uamfind(const int type, const char *name,
342 struct uam_obj *prev, *start;
344 if (!name || !(start = UAM_LIST(type)))
348 while ((prev = prev->uam_prev) != start)
349 if (strndiacasecmp(prev->uam_name, name, len) == 0)
355 int auth_register(const int type, struct uam_obj *uam)
357 struct uam_obj *start;
359 if (!uam || !uam->uam_name || (*uam->uam_name == '\0'))
362 if (!(start = UAM_LIST(type)))
363 return 0; /* silently fail */
365 uam_attach(start, uam);
369 /* load all of the modules */
370 int auth_load(const char *path, const char *list)
372 char name[MAXPATHLEN + 1], buf[MAXPATHLEN + 1], *p;
377 if (!path || !list || (len = strlen(path)) > sizeof(name) - 2)
380 strncpy(buf, list, sizeof(buf));
381 if ((p = strtok(buf, ",")) == NULL)
385 if (name[len - 1] != '/') {
391 strncpy(name + len, p, sizeof(name) - len);
392 if ((stat(name, &st) == 0) && (mod = uam_load(name, p))) {
393 uam_attach(&uam_modules, mod);
394 syslog(LOG_INFO, "uam: %s loaded", p);
396 p = strtok(NULL, ",");
400 /* get rid of all of the uams */
403 struct uam_mod *mod, *prev, *start = &uam_modules;
405 prev = start->uam_prev;
406 while ((mod = prev) != start) {
407 prev = prev->uam_prev;