2 * $Id: uam.c,v 1.24.6.3 2004-01-11 12:31:12 bfernhomberg 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"
60 #define utf8_encoding() (afp_version >= 30)
62 #define utf8_encoding() (0)
72 /* --- server uam functions -- */
74 extern int uam_setup(const char *path);
77 /* uam_load. uams must have a uam_setup function. */
78 struct uam_mod *uam_load(const char *path, const char *name)
80 char buf[MAXPATHLEN + 1], *p;
85 if ((module = mod_open(path)) == NULL) {
86 LOG(log_error, logtype_afpd, "uam_load(%s): failed to load: %s", name, mod_error());
91 if ((mod = (struct uam_mod *) malloc(sizeof(struct uam_mod))) == NULL) {
92 LOG(log_error, logtype_afpd, "uam_load(%s): malloc failed", name);
96 strncpy(buf, name, sizeof(buf));
97 buf[sizeof(buf) - 1] = '\0';
98 if ((p = strchr(buf, '.')))
102 if ((mod->uam_fcn = mod_symbol(module, buf)) == NULL) {
103 LOG(log_error, logtype_afpd, "uam_load(%s): mod_symbol error for symbol %s",
109 if (mod->uam_fcn->uam_type != UAM_MODULE_SERVER) {
110 LOG(log_error, logtype_afpd, "uam_load(%s): attempted to load a non-server module",
115 /* version check would go here */
117 if (!mod->uam_fcn->uam_setup ||
118 ((*mod->uam_fcn->uam_setup)(name) < 0)) {
119 LOG(log_error, logtype_afpd, "uam_load(%s): uam_setup failed", name);
126 mod->uam_module = module;
136 /* unload the module. we check for a cleanup function, but we don't
137 * die if one doesn't exist. however, things are likely to leak without one.
139 void uam_unload(struct uam_mod *mod)
141 if (mod->uam_fcn->uam_cleanup)
142 (*mod->uam_fcn->uam_cleanup)();
145 mod_close(mod->uam_module);
150 /* -- client-side uam functions -- */
152 /* set up stuff for this uam. */
153 int uam_register(const int type, const char *path, const char *name, ...)
162 /* see if it already exists. */
163 if ((uam = auth_uamfind(type, name, strlen(name)))) {
164 if (strcmp(uam->uam_path, path)) {
165 /* it exists, but it's not the same module. */
166 LOG(log_error, logtype_afpd, "uam_register: \"%s\" already loaded by %s",
174 /* allocate space for uam */
175 if ((uam = calloc(1, sizeof(struct uam_obj))) == NULL)
178 uam->uam_name = name;
179 uam->uam_path = strdup(path);
184 case UAM_SERVER_LOGIN_EXT: /* expect four arguments */
185 uam->u.uam_login.login = va_arg(ap, void *);
186 uam->u.uam_login.logincont = va_arg(ap, void *);
187 uam->u.uam_login.logout = va_arg(ap, void *);
188 uam->u.uam_login.login_ext = va_arg(ap, void *);
191 case UAM_SERVER_LOGIN: /* expect three arguments */
192 uam->u.uam_login.login_ext = NULL;
193 uam->u.uam_login.login = va_arg(ap, void *);
194 uam->u.uam_login.logincont = va_arg(ap, void *);
195 uam->u.uam_login.logout = va_arg(ap, void *);
197 case UAM_SERVER_CHANGEPW: /* one argument */
198 uam->u.uam_changepw = va_arg(ap, void *);
200 case UAM_SERVER_PRINTAUTH: /* x arguments */
206 /* attach to other uams */
207 ret = auth_register(type, uam);
218 int uam_register_fn(const int type, const char *path, const char *name, void *fn1, void *fn2,
219 void *fn3, void *fn4)
227 /* see if it already exists. */
228 if ((uam = auth_uamfind(type, name, strlen(name)))) {
229 if (strcmp(uam->uam_path, path)) {
230 /* it exists, but it's not the same module. */
231 LOG(log_error, logtype_afpd, "uam_register: \"%s\" already loaded by %s",
239 /* allocate space for uam */
240 if ((uam = calloc(1, sizeof(struct uam_obj))) == NULL)
243 uam->uam_name = name;
244 uam->uam_path = strdup(path);
248 case UAM_SERVER_LOGIN_EXT: /* expect four arguments */
249 uam->u.uam_login.login_ext = fn4;
250 uam->u.uam_login.login = fn1;
251 uam->u.uam_login.logincont = fn2;
252 uam->u.uam_login.logout = fn3;
254 case UAM_SERVER_LOGIN: /* expect three arguments */
255 uam->u.uam_login.login_ext = NULL;
256 uam->u.uam_login.login = fn1;
257 uam->u.uam_login.logincont = fn2;
258 uam->u.uam_login.logout = fn3;
260 case UAM_SERVER_CHANGEPW: /* one argument */
261 uam->u.uam_changepw = fn1;
263 case UAM_SERVER_PRINTAUTH: /* x arguments */
268 /* attach to other uams */
269 if (auth_register(type, uam) < 0) {
279 void uam_unregister(const int type, const char *name)
286 uam = auth_uamfind(type, name, strlen(name));
287 if (!uam || --uam->uam_count > 0)
290 auth_unregister(uam);
295 /* --- helper functions for plugin uams --- */
297 struct passwd *uam_getname(void *private, char *name, const int len)
299 AFPObj *obj = private;
300 struct passwd *pwent;
301 static char username[256];
302 static char user[256];
303 static char pwname[256];
306 u_int16_t flags = CONV_PRECOMPOSE;
308 if ((pwent = getpwnam(name)))
311 #ifndef NO_REAL_USER_NAME
313 if ( (size_t) -1 == (ulen = convert_charset((utf8_encoding())?CH_UTF8_MAC:obj->options.maccharset, 0,
314 CH_UCS2, name, len, username, 256, &flags)))
318 while ((pwent = getpwent())) {
319 if ((p = strchr(pwent->pw_gecos, ',')))
322 if ((size_t)-1 == ( ulen = convert_string(obj->options.unixcharset, CH_UCS2,
323 pwent->pw_gecos, strlen(pwent->pw_gecos), user, 256)) )
325 if ((size_t)-1 == ( ulen = convert_string(obj->options.unixcharset, CH_UCS2,
326 pwent->pw_name, strlen(pwent->pw_name), pwname, 256)) )
330 /* check against both the gecos and the name fields. the user
331 * might have just used a different capitalization. */
333 if ( (strncasecmp_w((ucs2_t*)user, (ucs2_t*)username, len) == 0) ||
334 ( strncasecmp_w ( (ucs2_t*) pwname, (ucs2_t*) username, len) == 0)) {
335 strncpy(name, pwent->pw_name, len);
336 name[len - 1] = '\0';
341 #endif /* ! NO_REAL_USER_NAME */
343 /* os x server doesn't keep anything useful if we do getpwent */
344 return pwent ? getpwnam(name) : NULL;
347 int uam_checkuser(const struct passwd *pwd)
354 #ifndef DISABLE_SHELLCHECK
355 if (!pwd->pw_shell || (*pwd->pw_shell == '\0')) {
356 LOG(log_info, logtype_afpd, "uam_checkuser: User %s does not have a shell", pwd->pw_name);
361 while ((p = getusershell())) {
362 if ( strcmp( p, pwd->pw_shell ) == 0 )
367 #ifndef DISABLE_SHELLCHECK
369 LOG(log_info, logtype_afpd, "illegal shell %s for %s", pwd->pw_shell, pwd->pw_name);
372 #endif /* DISABLE_SHELLCHECK */
377 /* afp-specific functions */
378 int uam_afpserver_option(void *private, const int what, void *option,
381 AFPObj *obj = private;
382 char **buf = (char **) option; /* most of the options are this */
390 case UAM_OPTION_USERNAME:
391 *buf = (void *) obj->username;
393 *len = sizeof(obj->username) - 1;
396 case UAM_OPTION_GUEST:
397 *buf = (void *) obj->options.guest;
399 *len = strlen(obj->options.guest);
402 case UAM_OPTION_PASSWDOPT:
407 case UAM_PASSWD_FILENAME:
408 *buf = (void *) obj->options.passwdfile;
409 *len = strlen(obj->options.passwdfile);
412 case UAM_PASSWD_MINLENGTH:
413 *((int *) option) = obj->options.passwdminlen;
414 *len = sizeof(obj->options.passwdminlen);
417 case UAM_PASSWD_MAXFAIL:
418 *((int *) option) = obj->options.loginmaxfail;
419 *len = sizeof(obj->options.loginmaxfail);
422 case UAM_PASSWD_EXPIRETIME: /* not implemented */
429 case UAM_OPTION_SIGNATURE:
430 *buf = (void *) (((AFPConfig *)obj->config)->signature);
435 case UAM_OPTION_RANDNUM: /* returns a random number in 4-byte units. */
436 if (!len || (*len < 0) || (*len % sizeof(result)))
439 /* construct a random number */
440 if ((fd = open("/dev/urandom", O_RDONLY)) < 0) {
443 char *randnum = (char *) option;
446 if (gettimeofday(&tv, &tz) < 0)
448 srandom(tv.tv_sec + (unsigned long) obj + (unsigned long) obj->handle);
449 for (i = 0; i < *len; i += sizeof(result)) {
451 memcpy(randnum + i, &result, sizeof(result));
454 result = read(fd, option, *len);
461 case UAM_OPTION_HOSTNAME:
462 *buf = (void *) obj->options.hostname;
464 *len = strlen(obj->options.hostname);
467 case UAM_OPTION_PROTOCOL:
468 *buf = (void *) obj->proto;
470 case UAM_OPTION_CLIENTNAME:
472 struct DSI *dsi = obj->handle;
475 hp = gethostbyaddr( (char *) &dsi->client.sin_addr,
476 sizeof( struct in_addr ),
477 dsi->client.sin_family );
479 *buf = (void *) hp->h_name;
481 *buf = (void *) inet_ntoa( dsi->client.sin_addr );
484 case UAM_OPTION_COOKIE:
485 /* it's up to the uam to actually store something useful here.
486 * this just passes back a handle to the cookie. the uam side
487 * needs to do something like **buf = (void *) cookie to store
489 *buf = (void *) &obj->uam_cookie;
491 case UAM_OPTION_KRB5SERVICE:
492 *buf = obj->options.k5service;
494 *len = (*buf)?strlen(*buf):0;
496 case UAM_OPTION_MACCHARSET:
497 *((int *) option) = obj->options.maccharset;
498 *len = sizeof(obj->options.maccharset);
500 case UAM_OPTION_UNIXCHARSET:
501 *((int *) option) = obj->options.unixcharset;
502 *len = sizeof(obj->options.unixcharset);
512 /* if we need to maintain a connection, this is how we do it.
513 * because an action pointer gets passed in, we can stream
515 int uam_afp_read(void *handle, char *buf, int *buflen,
516 int (*action)(void *, void *, const int))
518 AFPObj *obj = handle;
524 switch (obj->proto) {
526 if ((len = asp_wrtcont(obj->handle, buf, buflen )) < 0)
527 goto uam_afp_read_err;
528 return action(handle, buf, *buflen);
532 len = dsi_writeinit(obj->handle, buf, *buflen);
533 if (!len || ((len = action(handle, buf, len)) < 0)) {
534 dsi_writeflush(obj->handle);
535 goto uam_afp_read_err;
538 while ((len = (dsi_write(obj->handle, buf, *buflen)))) {
539 if ((len = action(handle, buf, len)) < 0) {
540 dsi_writeflush(obj->handle);
541 goto uam_afp_read_err;
554 void uam_afp_getcmdline( int *ac, char ***av )
556 afp_get_cmdline( ac, av );
559 int uam_sia_validate_user(sia_collect_func_t * collect, int argc, char **argv,
560 char *hostname, char *username, char *tty,
561 int colinput, char *gssapi, char *passphrase)
562 /* A clone of the Tru64 system function sia_validate_user() that calls
563 * sia_ses_authent() rather than sia_ses_reauthent()
564 * Added extra code to take into account suspected SIA bug whereby it clobbers
565 * the signal handler on SIGALRM (tickle) installed by Netatalk/afpd
568 SIAENTITY *entity = NULL;
569 struct sigaction act;
572 if ((rc=sia_ses_init(&entity, argc, argv, hostname, username, tty,
573 colinput, gssapi)) != SIASUCCESS) {
574 LOG(log_error, logtype_afpd, "cannot initialise SIA");
578 /* save old action for restoration later */
579 if (sigaction(SIGALRM, NULL, &act))
580 LOG(log_error, logtype_afpd, "cannot save SIGALRM handler");
582 if ((rc=sia_ses_authent(collect, passphrase, entity)) != SIASUCCESS) {
583 /* restore old action after clobbering by sia_ses_authent() */
584 if (sigaction(SIGALRM, &act, NULL))
585 LOG(log_error, logtype_afpd, "cannot restore SIGALRM handler");
587 LOG(log_info, logtype_afpd, "unsuccessful login for %s",
588 (hostname?hostname:"(null)"));
591 LOG(log_info, logtype_afpd, "successful login for %s",
592 (hostname?hostname:"(null)"));
594 /* restore old action after clobbering by sia_ses_authent() */
595 if (sigaction(SIGALRM, &act, NULL))
596 LOG(log_error, logtype_afpd, "cannot restore SIGALRM handler");
598 sia_ses_release(&entity);
604 /* --- papd-specific functions (just placeholders) --- */
605 void append(void *pf, char *data, int len)