2 * $Id: uam.c,v 1.24 2003-04-16 22:45:11 samnoble Exp $
4 * Copyright (c) 1999 Adrian Sun (asun@zoology.washington.edu)
5 * All Rights Reserved. See COPYRIGHT.
10 #endif /* HAVE_CONFIG_H */
18 #else /* STDC_HEADERS */
22 #endif /* HAVE_STRCHR */
23 char *strchr (), *strrchr ();
25 #define memcpy(d,s,n) bcopy ((s), (d), (n))
26 #define memmove(d,s,n) bcopy ((s), (d), (n))
27 #endif /* ! HAVE_MEMCPY */
28 #endif /* STDC_HEADERS */
32 #endif /* HAVE_UNISTD_H */
35 #endif /* HAVE_FCNTL_H */
37 #include <atalk/logger.h>
38 #include <sys/param.h>
39 #include <sys/socket.h>
43 #endif /* HAVE_DLFCN_H */
45 #include <netinet/in.h>
46 #include <arpa/inet.h>
48 #include <netatalk/endian.h>
49 #include <atalk/asp.h>
50 #include <atalk/dsi.h>
51 #include <atalk/afp.h>
52 #include <atalk/util.h>
55 #include "afp_config.h"
66 /* --- server uam functions -- */
68 extern int uam_setup(const char *path);
71 /* uam_load. uams must have a uam_setup function. */
72 struct uam_mod *uam_load(const char *path, const char *name)
74 char buf[MAXPATHLEN + 1], *p;
79 if ((module = mod_open(path)) == NULL) {
80 LOG(log_error, logtype_afpd, "uam_load(%s): failed to load: %s", name, mod_error());
85 if ((mod = (struct uam_mod *) malloc(sizeof(struct uam_mod))) == NULL) {
86 LOG(log_error, logtype_afpd, "uam_load(%s): malloc failed", name);
90 strncpy(buf, name, sizeof(buf));
91 buf[sizeof(buf) - 1] = '\0';
92 if ((p = strchr(buf, '.')))
96 if ((mod->uam_fcn = mod_symbol(module, buf)) == NULL) {
97 LOG(log_error, logtype_afpd, "uam_load(%s): mod_symbol error for symbol %s",
103 if (mod->uam_fcn->uam_type != UAM_MODULE_SERVER) {
104 LOG(log_error, logtype_afpd, "uam_load(%s): attempted to load a non-server module",
109 /* version check would go here */
111 if (!mod->uam_fcn->uam_setup ||
112 ((*mod->uam_fcn->uam_setup)(name) < 0)) {
113 LOG(log_error, logtype_afpd, "uam_load(%s): uam_setup failed", name);
120 mod->uam_module = module;
130 /* unload the module. we check for a cleanup function, but we don't
131 * die if one doesn't exist. however, things are likely to leak without one.
133 void uam_unload(struct uam_mod *mod)
135 if (mod->uam_fcn->uam_cleanup)
136 (*mod->uam_fcn->uam_cleanup)();
139 mod_close(mod->uam_module);
144 /* -- client-side uam functions -- */
146 /* set up stuff for this uam. */
147 int uam_register(const int type, const char *path, const char *name, ...)
155 /* see if it already exists. */
156 if ((uam = auth_uamfind(type, name, strlen(name)))) {
157 if (strcmp(uam->uam_path, path)) {
158 /* it exists, but it's not the same module. */
159 LOG(log_error, logtype_afpd, "uam_register: \"%s\" already loaded by %s",
167 /* allocate space for uam */
168 if ((uam = calloc(1, sizeof(struct uam_obj))) == NULL)
171 uam->uam_name = name;
172 uam->uam_path = strdup(path);
177 case UAM_SERVER_LOGIN_EXT: /* expect four arguments */
178 uam->u.uam_login.login = va_arg(ap, void *);
179 uam->u.uam_login.logincont = va_arg(ap, void *);
180 uam->u.uam_login.logout = va_arg(ap, void *);
181 uam->u.uam_login.login_ext = va_arg(ap, void *);
184 case UAM_SERVER_LOGIN: /* expect three arguments */
185 uam->u.uam_login.login_ext = NULL;
186 uam->u.uam_login.login = va_arg(ap, void *);
187 uam->u.uam_login.logincont = va_arg(ap, void *);
188 uam->u.uam_login.logout = va_arg(ap, void *);
190 case UAM_SERVER_CHANGEPW: /* one argument */
191 uam->u.uam_changepw = va_arg(ap, void *);
193 case UAM_SERVER_PRINTAUTH: /* x arguments */
199 /* attach to other uams */
200 if (auth_register(type, uam) < 0) {
211 int uam_register_fn(const int type, const char *path, const char *name, void *fn1, void *fn2,
212 void *fn3, void *fn4)
220 /* see if it already exists. */
221 if ((uam = auth_uamfind(type, name, strlen(name)))) {
222 if (strcmp(uam->uam_path, path)) {
223 /* it exists, but it's not the same module. */
224 LOG(log_error, logtype_afpd, "uam_register: \"%s\" already loaded by %s",
232 /* allocate space for uam */
233 if ((uam = calloc(1, sizeof(struct uam_obj))) == NULL)
236 uam->uam_name = name;
237 uam->uam_path = strdup(path);
241 case UAM_SERVER_LOGIN_EXT: /* expect four arguments */
242 uam->u.uam_login.login_ext = fn4;
243 uam->u.uam_login.login = fn1;
244 uam->u.uam_login.logincont = fn2;
245 uam->u.uam_login.logout = fn3;
247 case UAM_SERVER_LOGIN: /* expect three arguments */
248 uam->u.uam_login.login_ext = NULL;
249 uam->u.uam_login.login = fn1;
250 uam->u.uam_login.logincont = fn2;
251 uam->u.uam_login.logout = fn3;
253 case UAM_SERVER_CHANGEPW: /* one argument */
254 uam->u.uam_changepw = fn1;
256 case UAM_SERVER_PRINTAUTH: /* x arguments */
261 /* attach to other uams */
262 if (auth_register(type, uam) < 0) {
272 void uam_unregister(const int type, const char *name)
279 uam = auth_uamfind(type, name, strlen(name));
280 if (!uam || --uam->uam_count > 0)
283 auth_unregister(uam);
288 /* --- helper functions for plugin uams --- */
290 struct passwd *uam_getname(char *name, const int len)
292 struct passwd *pwent;
296 if ((pwent = getpwnam(name)))
299 #ifndef NO_REAL_USER_NAME
300 for (i = 0; i < len; i++)
301 name[i] = tolower(name[i]);
304 while ((pwent = getpwent())) {
305 if ((user = strchr(pwent->pw_gecos, ',')))
307 user = pwent->pw_gecos;
309 /* check against both the gecos and the name fields. the user
310 * might have just used a different capitalization. */
311 if ((strncasecmp(user, name, len) == 0) ||
312 (strncasecmp(pwent->pw_name, name, len) == 0)) {
313 strncpy(name, pwent->pw_name, len);
314 name[len - 1] = '\0';
319 #endif /* ! NO_REAL_USER_NAME */
321 /* os x server doesn't keep anything useful if we do getpwent */
322 return pwent ? getpwnam(name) : NULL;
325 int uam_checkuser(const struct passwd *pwd)
332 #ifndef DISABLE_SHELLCHECK
333 if (!pwd->pw_shell || (*pwd->pw_shell == '\0')) {
334 LOG(log_info, logtype_afpd, "uam_checkuser: User %s does not have a shell", pwd->pw_name);
339 while ((p = getusershell())) {
340 if ( strcmp( p, pwd->pw_shell ) == 0 )
345 #ifndef DISABLE_SHELLCHECK
347 LOG(log_info, logtype_afpd, "illegal shell %s for %s", pwd->pw_shell, pwd->pw_name);
350 #endif /* DISABLE_SHELLCHECK */
355 /* afp-specific functions */
356 int uam_afpserver_option(void *private, const int what, void *option,
359 AFPObj *obj = private;
360 char **buf = (char **) option; /* most of the options are this */
368 case UAM_OPTION_USERNAME:
369 *buf = (void *) obj->username;
371 *len = sizeof(obj->username) - 1;
374 case UAM_OPTION_GUEST:
375 *buf = (void *) obj->options.guest;
377 *len = strlen(obj->options.guest);
380 case UAM_OPTION_PASSWDOPT:
385 case UAM_PASSWD_FILENAME:
386 *buf = (void *) obj->options.passwdfile;
387 *len = strlen(obj->options.passwdfile);
390 case UAM_PASSWD_MINLENGTH:
391 *((int *) option) = obj->options.passwdminlen;
392 *len = sizeof(obj->options.passwdminlen);
395 case UAM_PASSWD_MAXFAIL:
396 *((int *) option) = obj->options.loginmaxfail;
397 *len = sizeof(obj->options.loginmaxfail);
400 case UAM_PASSWD_EXPIRETIME: /* not implemented */
407 case UAM_OPTION_SIGNATURE:
408 *buf = (void *) (((AFPConfig *)obj->config)->signature);
413 case UAM_OPTION_RANDNUM: /* returns a random number in 4-byte units. */
414 if (!len || (*len < 0) || (*len % sizeof(result)))
417 /* construct a random number */
418 if ((fd = open("/dev/urandom", O_RDONLY)) < 0) {
421 char *randnum = (char *) option;
424 if (gettimeofday(&tv, &tz) < 0)
426 srandom(tv.tv_sec + (unsigned long) obj + (unsigned long) obj->handle);
427 for (i = 0; i < *len; i += sizeof(result)) {
429 memcpy(randnum + i, &result, sizeof(result));
432 result = read(fd, option, *len);
439 case UAM_OPTION_HOSTNAME:
440 *buf = (void *) obj->options.hostname;
442 *len = strlen(obj->options.hostname);
445 case UAM_OPTION_PROTOCOL:
446 *buf = (void *) obj->proto;
448 case UAM_OPTION_CLIENTNAME:
450 struct DSI *dsi = obj->handle;
453 hp = gethostbyaddr( (char *) &dsi->client.sin_addr,
454 sizeof( struct in_addr ),
455 dsi->client.sin_family );
457 *buf = (void *) hp->h_name;
459 *buf = (void *) inet_ntoa( dsi->client.sin_addr );
462 case UAM_OPTION_COOKIE:
463 /* it's up to the uam to actually store something useful here.
464 * this just passes back a handle to the cookie. the uam side
465 * needs to do something like **buf = (void *) cookie to store
467 *buf = (void *) &obj->uam_cookie;
469 case UAM_OPTION_KRB5SERVICE:
470 *buf = obj->options.k5service;
472 *len = strlen(obj->options.k5service);
482 /* if we need to maintain a connection, this is how we do it.
483 * because an action pointer gets passed in, we can stream
485 int uam_afp_read(void *handle, char *buf, int *buflen,
486 int (*action)(void *, void *, const int))
488 AFPObj *obj = handle;
494 switch (obj->proto) {
496 if ((len = asp_wrtcont(obj->handle, buf, buflen )) < 0)
497 goto uam_afp_read_err;
498 return action(handle, buf, *buflen);
502 len = dsi_writeinit(obj->handle, buf, *buflen);
503 if (!len || ((len = action(handle, buf, len)) < 0)) {
504 dsi_writeflush(obj->handle);
505 goto uam_afp_read_err;
508 while ((len = (dsi_write(obj->handle, buf, *buflen)))) {
509 if ((len = action(handle, buf, len)) < 0) {
510 dsi_writeflush(obj->handle);
511 goto uam_afp_read_err;
524 void uam_afp_getcmdline( int *ac, char ***av )
526 afp_get_cmdline( ac, av );
529 int uam_sia_validate_user(sia_collect_func_t * collect, int argc, char **argv,
530 char *hostname, char *username, char *tty,
531 int colinput, char *gssapi, char *passphrase)
532 /* A clone of the Tru64 system function sia_validate_user() that calls
533 * sia_ses_authent() rather than sia_ses_reauthent()
534 * Added extra code to take into account suspected SIA bug whereby it clobbers
535 * the signal handler on SIGALRM (tickle) installed by Netatalk/afpd
538 SIAENTITY *entity = NULL;
539 struct sigaction act;
542 if ((rc=sia_ses_init(&entity, argc, argv, hostname, username, tty,
543 colinput, gssapi)) != SIASUCCESS) {
544 LOG(log_error, logtype_afpd, "cannot initialise SIA");
548 /* save old action for restoration later */
549 if (sigaction(SIGALRM, NULL, &act))
550 LOG(log_error, logtype_afpd, "cannot save SIGALRM handler");
552 if ((rc=sia_ses_authent(collect, passphrase, entity)) != SIASUCCESS) {
553 /* restore old action after clobbering by sia_ses_authent() */
554 if (sigaction(SIGALRM, &act, NULL))
555 LOG(log_error, logtype_afpd, "cannot restore SIGALRM handler");
557 LOG(log_info, logtype_afpd, "unsuccessful login for %s",
558 (hostname?hostname:"(null)"));
561 LOG(log_info, logtype_afpd, "successful login for %s",
562 (hostname?hostname:"(null)"));
564 /* restore old action after clobbering by sia_ses_authent() */
565 if (sigaction(SIGALRM, &act, NULL))
566 LOG(log_error, logtype_afpd, "cannot restore SIGALRM handler");
568 sia_ses_release(&entity);
574 /* --- papd-specific functions (just placeholders) --- */
575 void append(void *pf, char *data, int len)