2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 2003 Networks Associates Technology, Inc.
7 * This software was developed for the FreeBSD Project by
8 * Jacques A. Vidrine, Safeport Network Services, and Network
9 * Associates Laboratories, the Security Research Division of Network
10 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
11 * ("CBOSS"), as part of the DARPA CHATS research program.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
38 #include "namespace.h"
39 #include <sys/param.h>
42 #include <rpcsvc/yp_prot.h>
43 #include <rpcsvc/ypclnt.h>
45 #include <arpa/inet.h>
54 #include <pthread_np.h>
61 #include "un-namespace.h"
63 #include "libc_private.h"
71 #define CTASSERT(x) _CTASSERT(x, __LINE__)
72 #define _CTASSERT(x, y) __CTASSERT(x, y)
73 #define __CTASSERT(x, y) typedef char __assert_ ## y [(x) ? 1 : -1]
76 /* Counter as stored in /etc/pwd.db */
79 CTASSERT(MAXLOGNAME > sizeof(uid_t));
80 CTASSERT(MAXLOGNAME > sizeof(pwkeynum));
83 PWD_STORAGE_INITIAL = 1 << 10, /* 1 KByte */
84 PWD_STORAGE_MAX = 1 << 20, /* 1 MByte */
90 static const ns_src defaultsrc[] = {
91 { NSSRC_COMPAT, NS_SUCCESS },
95 int __pw_match_entry(const char *, size_t, enum nss_lookup_type,
97 int __pw_parse_entry(char *, size_t, struct passwd *, int, int *errnop);
104 static struct passwd *getpw(int (*fn)(union key, struct passwd *, char *,
105 size_t, struct passwd **), union key);
106 static int wrap_getpwnam_r(union key, struct passwd *, char *,
107 size_t, struct passwd **);
108 static int wrap_getpwuid_r(union key, struct passwd *, char *, size_t,
110 static int wrap_getpwent_r(union key, struct passwd *, char *, size_t,
113 static int pwdb_match_entry_v3(char *, size_t, enum nss_lookup_type,
114 const char *, uid_t);
115 static int pwdb_parse_entry_v3(char *, size_t, struct passwd *, int *);
116 static int pwdb_match_entry_v4(char *, size_t, enum nss_lookup_type,
117 const char *, uid_t);
118 static int pwdb_parse_entry_v4(char *, size_t, struct passwd *, int *);
122 int (*match)(char *, size_t, enum nss_lookup_type, const char *,
124 int (*parse)(char *, size_t, struct passwd *, int *);
125 } pwdb_versions[] = {
126 { NULL, NULL }, /* version 0 */
127 { NULL, NULL }, /* version 1 */
128 { NULL, NULL }, /* version 2 */
129 { pwdb_match_entry_v3, pwdb_parse_entry_v3 }, /* version 3 */
130 { pwdb_match_entry_v4, pwdb_parse_entry_v4 }, /* version 4 */
140 static void files_endstate(void *);
141 NSS_TLS_HANDLING(files);
142 static DB *pwdbopen(int *);
143 static void files_endstate(void *);
144 static int files_setpwent(void *, void *, va_list);
145 static int files_passwd(void *, void *, va_list);
152 static void dns_endstate(void *);
153 NSS_TLS_HANDLING(dns);
154 static int dns_setpwent(void *, void *, va_list);
155 static int dns_passwd(void *, void *, va_list);
161 char domain[MAXHOSTNAMELEN];
166 static void nis_endstate(void *);
167 NSS_TLS_HANDLING(nis);
168 static int nis_setpwent(void *, void *, va_list);
169 static int nis_passwd(void *, void *, va_list);
170 static int nis_map(char *, enum nss_lookup_type, char *, size_t, int *);
171 static int nis_adjunct(char *, const char *, char *, size_t);
175 struct compat_state {
181 struct passwd template;
190 static void compat_endstate(void *);
191 NSS_TLS_HANDLING(compat);
192 static int compat_setpwent(void *, void *, va_list);
193 static int compat_passwd(void *, void *, va_list);
194 static void compat_clear_template(struct passwd *);
195 static int compat_set_template(struct passwd *, struct passwd *);
196 static int compat_use_template(struct passwd *, struct passwd *, char *,
198 static int compat_redispatch(struct compat_state *, enum nss_lookup_type,
199 enum nss_lookup_type, const char *, const char *, uid_t,
200 struct passwd *, char *, size_t, int *);
203 static int pwd_id_func(char *, size_t *, va_list ap, void *);
204 static int pwd_marshal_func(char *, size_t *, void *, va_list, void *);
205 static int pwd_unmarshal_func(char *, size_t, void *, va_list, void *);
208 pwd_id_func(char *buffer, size_t *buffer_size, va_list ap, void *cache_mdata)
212 size_t size, desired_size;
213 int res = NS_UNAVAIL;
214 enum nss_lookup_type lookup_type;
216 lookup_type = (enum nss_lookup_type)(uintptr_t)cache_mdata;
217 switch (lookup_type) {
219 name = va_arg(ap, char *);
221 desired_size = sizeof(enum nss_lookup_type) + size + 1;
222 if (desired_size > *buffer_size) {
227 memcpy(buffer, &lookup_type, sizeof(enum nss_lookup_type));
228 memcpy(buffer + sizeof(enum nss_lookup_type), name, size + 1);
233 uid = va_arg(ap, uid_t);
234 desired_size = sizeof(enum nss_lookup_type) + sizeof(uid_t);
235 if (desired_size > *buffer_size) {
240 memcpy(buffer, &lookup_type, sizeof(enum nss_lookup_type));
241 memcpy(buffer + sizeof(enum nss_lookup_type), &uid,
247 /* should be unreachable */
252 *buffer_size = desired_size;
257 pwd_marshal_func(char *buffer, size_t *buffer_size, void *retval, va_list ap,
263 char *orig_buf __unused;
264 size_t orig_buf_size __unused;
266 struct passwd new_pwd;
267 size_t desired_size, size;
270 switch ((enum nss_lookup_type)(uintptr_t)cache_mdata) {
272 name = va_arg(ap, char *);
275 uid = va_arg(ap, uid_t);
280 /* should be unreachable */
284 pwd = va_arg(ap, struct passwd *);
285 orig_buf = va_arg(ap, char *);
286 orig_buf_size = va_arg(ap, size_t);
288 desired_size = sizeof(struct passwd) + sizeof(char *) +
289 strlen(pwd->pw_name) + 1;
290 if (pwd->pw_passwd != NULL)
291 desired_size += strlen(pwd->pw_passwd) + 1;
292 if (pwd->pw_class != NULL)
293 desired_size += strlen(pwd->pw_class) + 1;
294 if (pwd->pw_gecos != NULL)
295 desired_size += strlen(pwd->pw_gecos) + 1;
296 if (pwd->pw_dir != NULL)
297 desired_size += strlen(pwd->pw_dir) + 1;
298 if (pwd->pw_shell != NULL)
299 desired_size += strlen(pwd->pw_shell) + 1;
301 if (*buffer_size < desired_size) {
302 /* this assignment is here for future use */
303 *buffer_size = desired_size;
307 memcpy(&new_pwd, pwd, sizeof(struct passwd));
308 memset(buffer, 0, desired_size);
310 *buffer_size = desired_size;
311 p = buffer + sizeof(struct passwd) + sizeof(char *);
312 memcpy(buffer + sizeof(struct passwd), &p, sizeof(char *));
314 if (new_pwd.pw_name != NULL) {
315 size = strlen(new_pwd.pw_name);
316 memcpy(p, new_pwd.pw_name, size);
321 if (new_pwd.pw_passwd != NULL) {
322 size = strlen(new_pwd.pw_passwd);
323 memcpy(p, new_pwd.pw_passwd, size);
324 new_pwd.pw_passwd = p;
328 if (new_pwd.pw_class != NULL) {
329 size = strlen(new_pwd.pw_class);
330 memcpy(p, new_pwd.pw_class, size);
331 new_pwd.pw_class = p;
335 if (new_pwd.pw_gecos != NULL) {
336 size = strlen(new_pwd.pw_gecos);
337 memcpy(p, new_pwd.pw_gecos, size);
338 new_pwd.pw_gecos = p;
342 if (new_pwd.pw_dir != NULL) {
343 size = strlen(new_pwd.pw_dir);
344 memcpy(p, new_pwd.pw_dir, size);
349 if (new_pwd.pw_shell != NULL) {
350 size = strlen(new_pwd.pw_shell);
351 memcpy(p, new_pwd.pw_shell, size);
352 new_pwd.pw_shell = p;
356 memcpy(buffer, &new_pwd, sizeof(struct passwd));
361 pwd_unmarshal_func(char *buffer, size_t buffer_size, void *retval, va_list ap,
368 size_t orig_buf_size;
373 switch ((enum nss_lookup_type)(uintptr_t)cache_mdata) {
375 name = va_arg(ap, char *);
378 uid = va_arg(ap, uid_t);
383 /* should be unreachable */
387 pwd = va_arg(ap, struct passwd *);
388 orig_buf = va_arg(ap, char *);
389 orig_buf_size = va_arg(ap, size_t);
390 ret_errno = va_arg(ap, int *);
392 if (orig_buf_size + sizeof(struct passwd) + sizeof(char *) <
396 } else if (buffer_size < sizeof(struct passwd) + sizeof(char *)) {
398 * nscd(8) sometimes returns buffer_size=1 for nonexistent
402 return (NS_NOTFOUND);
405 memcpy(pwd, buffer, sizeof(struct passwd));
406 memcpy(&p, buffer + sizeof(struct passwd), sizeof(char *));
407 memcpy(orig_buf, buffer + sizeof(struct passwd) + sizeof(char *),
408 buffer_size - sizeof(struct passwd) - sizeof(char *));
410 NS_APPLY_OFFSET(pwd->pw_name, orig_buf, p, char *);
411 NS_APPLY_OFFSET(pwd->pw_passwd, orig_buf, p, char *);
412 NS_APPLY_OFFSET(pwd->pw_class, orig_buf, p, char *);
413 NS_APPLY_OFFSET(pwd->pw_gecos, orig_buf, p, char *);
414 NS_APPLY_OFFSET(pwd->pw_dir, orig_buf, p, char *);
415 NS_APPLY_OFFSET(pwd->pw_shell, orig_buf, p, char *);
418 *((struct passwd **)retval) = pwd;
423 NSS_MP_CACHE_HANDLING(passwd);
424 #endif /* NS_CACHING */
430 static const nss_cache_info cache_info = NS_MP_CACHE_INFO_INITIALIZER(
431 passwd, (void *)nss_lt_all,
435 static const ns_dtab dtab[] = {
436 { NSSRC_FILES, files_setpwent, (void *)SETPWENT },
438 { NSSRC_DNS, dns_setpwent, (void *)SETPWENT },
441 { NSSRC_NIS, nis_setpwent, (void *)SETPWENT },
443 { NSSRC_COMPAT, compat_setpwent, (void *)SETPWENT },
445 NS_CACHE_CB(&cache_info)
449 (void)_nsdispatch(NULL, dtab, NSDB_PASSWD, "setpwent", defaultsrc, 0);
454 setpassent(int stayopen)
457 static const nss_cache_info cache_info = NS_MP_CACHE_INFO_INITIALIZER(
458 passwd, (void *)nss_lt_all,
462 static const ns_dtab dtab[] = {
463 { NSSRC_FILES, files_setpwent, (void *)SETPWENT },
465 { NSSRC_DNS, dns_setpwent, (void *)SETPWENT },
468 { NSSRC_NIS, nis_setpwent, (void *)SETPWENT },
470 { NSSRC_COMPAT, compat_setpwent, (void *)SETPWENT },
472 NS_CACHE_CB(&cache_info)
476 (void)_nsdispatch(NULL, dtab, NSDB_PASSWD, "setpwent", defaultsrc,
486 static const nss_cache_info cache_info = NS_MP_CACHE_INFO_INITIALIZER(
487 passwd, (void *)nss_lt_all,
491 static const ns_dtab dtab[] = {
492 { NSSRC_FILES, files_setpwent, (void *)ENDPWENT },
494 { NSSRC_DNS, dns_setpwent, (void *)ENDPWENT },
497 { NSSRC_NIS, nis_setpwent, (void *)ENDPWENT },
499 { NSSRC_COMPAT, compat_setpwent, (void *)ENDPWENT },
501 NS_CACHE_CB(&cache_info)
505 (void)_nsdispatch(NULL, dtab, NSDB_PASSWD, "endpwent", defaultsrc);
510 getpwent_r(struct passwd *pwd, char *buffer, size_t bufsize,
511 struct passwd **result)
514 static const nss_cache_info cache_info = NS_MP_CACHE_INFO_INITIALIZER(
515 passwd, (void *)nss_lt_all,
516 pwd_marshal_func, pwd_unmarshal_func);
519 static const ns_dtab dtab[] = {
520 { NSSRC_FILES, files_passwd, (void *)nss_lt_all },
522 { NSSRC_DNS, dns_passwd, (void *)nss_lt_all },
525 { NSSRC_NIS, nis_passwd, (void *)nss_lt_all },
527 { NSSRC_COMPAT, compat_passwd, (void *)nss_lt_all },
529 NS_CACHE_CB(&cache_info)
538 rv = _nsdispatch(result, dtab, NSDB_PASSWD, "getpwent_r", defaultsrc,
539 pwd, buffer, bufsize, &ret_errno);
540 if (rv == NS_SUCCESS)
548 getpwnam_r(const char *name, struct passwd *pwd, char *buffer, size_t bufsize,
549 struct passwd **result)
552 static const nss_cache_info cache_info =
553 NS_COMMON_CACHE_INFO_INITIALIZER(
554 passwd, (void *)nss_lt_name,
555 pwd_id_func, pwd_marshal_func, pwd_unmarshal_func);
558 static const ns_dtab dtab[] = {
559 { NSSRC_FILES, files_passwd, (void *)nss_lt_name },
561 { NSSRC_DNS, dns_passwd, (void *)nss_lt_name },
564 { NSSRC_NIS, nis_passwd, (void *)nss_lt_name },
566 { NSSRC_COMPAT, compat_passwd, (void *)nss_lt_name },
568 NS_CACHE_CB(&cache_info)
577 rv = _nsdispatch(result, dtab, NSDB_PASSWD, "getpwnam_r", defaultsrc,
578 name, pwd, buffer, bufsize, &ret_errno);
579 if (rv == NS_SUCCESS)
587 getpwuid_r(uid_t uid, struct passwd *pwd, char *buffer, size_t bufsize,
588 struct passwd **result)
591 static const nss_cache_info cache_info =
592 NS_COMMON_CACHE_INFO_INITIALIZER(
593 passwd, (void *)nss_lt_id,
594 pwd_id_func, pwd_marshal_func, pwd_unmarshal_func);
597 static const ns_dtab dtab[] = {
598 { NSSRC_FILES, files_passwd, (void *)nss_lt_id },
600 { NSSRC_DNS, dns_passwd, (void *)nss_lt_id },
603 { NSSRC_NIS, nis_passwd, (void *)nss_lt_id },
605 { NSSRC_COMPAT, compat_passwd, (void *)nss_lt_id },
607 NS_CACHE_CB(&cache_info)
616 rv = _nsdispatch(result, dtab, NSDB_PASSWD, "getpwuid_r", defaultsrc,
617 uid, pwd, buffer, bufsize, &ret_errno);
618 if (rv == NS_SUCCESS)
625 static struct passwd pwd;
626 static char *pwd_storage;
627 static size_t pwd_storage_size;
630 static struct passwd *
631 getpw(int (*fn)(union key, struct passwd *, char *, size_t, struct passwd **),
637 if (pwd_storage == NULL) {
638 pwd_storage = malloc(PWD_STORAGE_INITIAL);
639 if (pwd_storage == NULL)
641 pwd_storage_size = PWD_STORAGE_INITIAL;
644 rv = fn(key, &pwd, pwd_storage, pwd_storage_size, &res);
645 if (res == NULL && rv == ERANGE) {
647 if ((pwd_storage_size << 1) > PWD_STORAGE_MAX) {
652 pwd_storage_size <<= 1;
653 pwd_storage = malloc(pwd_storage_size);
654 if (pwd_storage == NULL)
657 } while (res == NULL && rv == ERANGE);
665 wrap_getpwnam_r(union key key, struct passwd *pwd, char *buffer,
666 size_t bufsize, struct passwd **res)
668 return (getpwnam_r(key.name, pwd, buffer, bufsize, res));
673 wrap_getpwuid_r(union key key, struct passwd *pwd, char *buffer,
674 size_t bufsize, struct passwd **res)
676 return (getpwuid_r(key.uid, pwd, buffer, bufsize, res));
681 wrap_getpwent_r(union key key __unused, struct passwd *pwd, char *buffer,
682 size_t bufsize, struct passwd **res)
684 return (getpwent_r(pwd, buffer, bufsize, res));
689 getpwnam(const char *name)
694 return (getpw(wrap_getpwnam_r, key));
704 return (getpw(wrap_getpwuid_r, key));
713 key.uid = 0; /* not used */
714 return (getpw(wrap_getpwent_r, key));
722 pwdbopen(int *version)
728 if (geteuid() != 0 ||
729 (res = dbopen(_PATH_SMP_DB, O_RDONLY, 0, DB_HASH, NULL)) == NULL)
730 res = dbopen(_PATH_MP_DB, O_RDONLY, 0, DB_HASH, NULL);
733 key.data = _PWD_VERSION_KEY;
734 key.size = strlen(_PWD_VERSION_KEY);
735 rv = res->get(res, &key, &entry, 0);
737 *version = *(unsigned char *)entry.data;
741 *version >= nitems(pwdb_versions)) {
742 syslog(LOG_CRIT, "Unsupported password database version %d",
752 files_endstate(void *p)
758 db = ((struct files_state *)p)->db;
766 files_setpwent(void *retval, void *mdata, va_list ap)
768 struct files_state *st;
771 rv = files_getstate(&st);
774 switch ((enum constants)(uintptr_t)mdata) {
776 stayopen = va_arg(ap, int);
779 st->db = pwdbopen(&st->version);
780 st->stayopen = stayopen;
783 if (st->db != NULL) {
784 (void)st->db->close(st->db);
796 files_passwd(void *retval, void *mdata, va_list ap)
798 char keybuf[MAXLOGNAME + 1];
800 struct files_state *st;
801 enum nss_lookup_type how;
805 size_t bufsize, namesize;
808 int rv, stayopen = 0, *errnop;
812 how = (enum nss_lookup_type)(uintptr_t)mdata;
815 name = va_arg(ap, const char *);
816 keybuf[0] = _PW_KEYBYNAME;
819 uid = va_arg(ap, uid_t);
820 keybuf[0] = _PW_KEYBYUID;
823 keybuf[0] = _PW_KEYBYNUM;
829 pwd = va_arg(ap, struct passwd *);
830 buffer = va_arg(ap, char *);
831 bufsize = va_arg(ap, size_t);
832 errnop = va_arg(ap, int *);
833 *errnop = files_getstate(&st);
836 if (how == nss_lt_all && st->keynum < 0) {
840 if (st->db == NULL &&
841 (st->db = pwdbopen(&st->version)) == NULL) {
846 if (how == nss_lt_all)
849 stayopen = st->stayopen;
854 /* MAXLOGNAME includes NUL byte, but we do not
855 * include the NUL byte in the key.
857 namesize = strlcpy(&keybuf[1], name, sizeof(keybuf)-1);
858 if (namesize >= sizeof(keybuf)-1) {
863 key.size = namesize + 1;
866 if (st->version < _PWD_CURRENT_VERSION) {
867 memcpy(&keybuf[1], &uid, sizeof(uid));
868 key.size = sizeof(uid) + 1;
871 memcpy(&keybuf[1], &store, sizeof(store));
872 key.size = sizeof(store) + 1;
877 if (st->version < _PWD_CURRENT_VERSION) {
878 memcpy(&keybuf[1], &st->keynum,
880 key.size = sizeof(st->keynum) + 1;
882 store = htonl(st->keynum);
883 memcpy(&keybuf[1], &store, sizeof(store));
884 key.size = sizeof(store) + 1;
888 keybuf[0] = _PW_VERSIONED(keybuf[0], st->version);
889 rv = st->db->get(st->db, &key, &entry, 0);
890 if (rv < 0 || rv > 1) { /* should never return > 1 */
894 } else if (rv == 1) {
895 if (how == nss_lt_all)
900 rv = pwdb_versions[st->version].match(entry.data, entry.size,
902 if (rv != NS_SUCCESS)
904 if (entry.size > bufsize) {
909 memcpy(buffer, entry.data, entry.size);
910 rv = pwdb_versions[st->version].parse(buffer, entry.size, pwd,
912 } while (how == nss_lt_all && !(rv & NS_TERMINATE));
914 if (st->db != NULL && !stayopen) {
915 (void)st->db->close(st->db);
918 if (rv == NS_SUCCESS) {
919 pwd->pw_fields &= ~_PWF_SOURCE;
920 pwd->pw_fields |= _PWF_FILES;
922 *(struct passwd **)retval = pwd;
929 pwdb_match_entry_v3(char *entry, size_t entrysize, enum nss_lookup_type how,
930 const char *name, uid_t uid)
935 eom = &entry[entrysize];
936 for (p = entry; p < eom; p++)
940 return (NS_NOTFOUND);
941 if (how == nss_lt_all)
943 if (how == nss_lt_name)
944 return (strcmp(name, entry) == 0 ? NS_SUCCESS : NS_NOTFOUND);
945 for (p++; p < eom; p++)
948 if (*p != '\0' || (++p) + sizeof(uid) >= eom)
949 return (NS_NOTFOUND);
950 memcpy(&uid2, p, sizeof(uid2));
951 return (uid == uid2 ? NS_SUCCESS : NS_NOTFOUND);
956 pwdb_parse_entry_v3(char *buffer, size_t bufsize, struct passwd *pwd,
960 int32_t pw_change, pw_expire;
962 /* THIS CODE MUST MATCH THAT IN pwd_mkdb. */
964 eom = &buffer[bufsize];
965 #define STRING(field) do { \
967 while (p < eom && *p != '\0') \
970 return (NS_NOTFOUND); \
973 #define SCALAR(field) do { \
974 if (p + sizeof(field) > eom) \
975 return (NS_NOTFOUND); \
976 memcpy(&(field), p, sizeof(field)); \
977 p += sizeof(field); \
979 STRING(pwd->pw_name);
980 STRING(pwd->pw_passwd);
984 STRING(pwd->pw_class);
985 STRING(pwd->pw_gecos);
987 STRING(pwd->pw_shell);
989 SCALAR(pwd->pw_fields);
992 pwd->pw_change = pw_change;
993 pwd->pw_expire = pw_expire;
999 pwdb_match_entry_v4(char *entry, size_t entrysize, enum nss_lookup_type how,
1000 const char *name, uid_t uid)
1002 const char *p, *eom;
1005 eom = &entry[entrysize];
1006 for (p = entry; p < eom; p++)
1010 return (NS_NOTFOUND);
1011 if (how == nss_lt_all)
1012 return (NS_SUCCESS);
1013 if (how == nss_lt_name)
1014 return (strcmp(name, entry) == 0 ? NS_SUCCESS : NS_NOTFOUND);
1015 for (p++; p < eom; p++)
1018 if (*p != '\0' || (++p) + sizeof(uid) >= eom)
1019 return (NS_NOTFOUND);
1020 memcpy(&uid2, p, sizeof(uid2));
1022 return (uid == (uid_t)uid2 ? NS_SUCCESS : NS_NOTFOUND);
1027 pwdb_parse_entry_v4(char *buffer, size_t bufsize, struct passwd *pwd,
1033 /* THIS CODE MUST MATCH THAT IN pwd_mkdb. */
1035 eom = &buffer[bufsize];
1036 #define STRING(field) do { \
1038 while (p < eom && *p != '\0') \
1041 return (NS_NOTFOUND); \
1044 #define SCALAR(field) do { \
1045 if (p + sizeof(n) > eom) \
1046 return (NS_NOTFOUND); \
1047 memcpy(&n, p, sizeof(n)); \
1048 (field) = ntohl(n); \
1051 STRING(pwd->pw_name);
1052 STRING(pwd->pw_passwd);
1053 SCALAR(pwd->pw_uid);
1054 SCALAR(pwd->pw_gid);
1055 SCALAR(pwd->pw_change);
1056 STRING(pwd->pw_class);
1057 STRING(pwd->pw_gecos);
1058 STRING(pwd->pw_dir);
1059 STRING(pwd->pw_shell);
1060 SCALAR(pwd->pw_expire);
1061 SCALAR(pwd->pw_fields);
1064 return (NS_SUCCESS);
1073 dns_endstate(void *p)
1080 dns_setpwent(void *retval, void *mdata, va_list ap)
1082 struct dns_state *st;
1085 rv = dns_getstate(&st);
1087 return (NS_UNAVAIL);
1089 return (NS_UNAVAIL);
1094 dns_passwd(void *retval, void *mdata, va_list ap)
1096 char buf[HESIOD_NAME_MAX];
1097 struct dns_state *st;
1099 const char *name, *label;
1101 char *buffer, **hes;
1102 size_t bufsize, linesize;
1104 enum nss_lookup_type how;
1111 how = (enum nss_lookup_type)(uintptr_t)mdata;
1114 name = va_arg(ap, const char *);
1117 uid = va_arg(ap, uid_t);
1122 pwd = va_arg(ap, struct passwd *);
1123 buffer = va_arg(ap, char *);
1124 bufsize = va_arg(ap, size_t);
1125 errnop = va_arg(ap, int *);
1126 *errnop = dns_getstate(&st);
1128 return (NS_UNAVAIL);
1129 if (hesiod_init(&ctx) != 0) {
1141 if (snprintf(buf, sizeof(buf), "%lu",
1142 (unsigned long)uid) >= sizeof(buf))
1147 if (st->counter < 0)
1149 if (snprintf(buf, sizeof(buf), "passwd-%ld",
1150 st->counter++) >= sizeof(buf))
1155 hes = hesiod_resolve(ctx, label,
1156 how == nss_lt_id ? "uid" : "passwd");
1158 if (how == nss_lt_all)
1160 if (errno != ENOENT)
1164 rv = __pw_match_entry(hes[0], strlen(hes[0]), how, name, uid);
1165 if (rv != NS_SUCCESS) {
1166 hesiod_free_list(ctx, hes);
1170 linesize = strlcpy(buffer, hes[0], bufsize);
1171 if (linesize >= bufsize) {
1176 hesiod_free_list(ctx, hes);
1178 rv = __pw_parse_entry(buffer, bufsize, pwd, 0, errnop);
1179 } while (how == nss_lt_all && !(rv & NS_TERMINATE));
1182 hesiod_free_list(ctx, hes);
1185 if (rv == NS_SUCCESS) {
1186 pwd->pw_fields &= ~_PWF_SOURCE;
1187 pwd->pw_fields |= _PWF_HESIOD;
1189 *(struct passwd **)retval = pwd;
1201 nis_endstate(void *p)
1203 free(((struct nis_state *)p)->key);
1208 * Test for the presence of special FreeBSD-specific master.passwd.by*
1209 * maps. We do this using yp_order(). If it fails, then either the server
1210 * doesn't have the map, or the YPPROC_ORDER procedure isn't supported by
1211 * the server (Sun NIS+ servers in YP compat mode behave this way). If
1212 * the master.passwd.by* maps don't exist, then let the lookup routine try
1213 * the regular passwd.by* maps instead. If the lookup routine fails, it
1214 * can return an error as needed.
1217 nis_map(char *domain, enum nss_lookup_type how, char *buffer, size_t bufsize,
1223 if (geteuid() == 0) {
1224 if (snprintf(buffer, bufsize, "master.passwd.by%s",
1225 (how == nss_lt_id) ? "uid" : "name") >= bufsize)
1226 return (NS_UNAVAIL);
1227 rv = yp_order(domain, buffer, &order);
1230 return (NS_SUCCESS);
1234 if (snprintf(buffer, bufsize, "passwd.by%s",
1235 (how == nss_lt_id) ? "uid" : "name") >= bufsize)
1236 return (NS_UNAVAIL);
1238 return (NS_SUCCESS);
1243 nis_adjunct(char *domain, const char *name, char *buffer, size_t bufsize)
1246 char *result, *p, *q, *eor;
1250 rv = yp_match(domain, "passwd.adjunct.byname", name, strlen(name),
1251 &result, &resultlen);
1255 eor = &result[resultlen];
1256 p = memchr(result, ':', eor - result);
1257 if (p != NULL && ++p < eor &&
1258 (q = memchr(p, ':', eor - p)) != NULL) {
1259 if (q - p >= bufsize)
1262 memcpy(buffer, p, q - p);
1263 buffer[q - p] ='\0';
1274 nis_setpwent(void *retval, void *mdata, va_list ap)
1276 struct nis_state *st;
1279 rv = nis_getstate(&st);
1281 return (NS_UNAVAIL);
1285 return (NS_UNAVAIL);
1290 nis_passwd(void *retval, void *mdata, va_list ap)
1293 struct nis_state *st;
1296 char *buffer, *key, *result;
1299 enum nss_lookup_type how;
1300 int *errnop, keylen, resultlen, rv, master;
1304 how = (enum nss_lookup_type)(uintptr_t)mdata;
1307 name = va_arg(ap, const char *);
1310 uid = va_arg(ap, uid_t);
1315 pwd = va_arg(ap, struct passwd *);
1316 buffer = va_arg(ap, char *);
1317 bufsize = va_arg(ap, size_t);
1318 errnop = va_arg(ap, int *);
1319 *errnop = nis_getstate(&st);
1321 return (NS_UNAVAIL);
1322 if (st->domain[0] == '\0') {
1323 if (getdomainname(st->domain, sizeof(st->domain)) != 0) {
1325 return (NS_UNAVAIL);
1328 rv = nis_map(st->domain, how, map, sizeof(map), &master);
1329 if (rv != NS_SUCCESS)
1336 if (strlcpy(buffer, name, bufsize) >= bufsize)
1340 if (snprintf(buffer, bufsize, "%lu",
1341 (unsigned long)uid) >= bufsize)
1350 if (how == nss_lt_all) {
1351 if (st->key == NULL)
1352 rv = yp_first(st->domain, map, &st->key,
1353 &st->keylen, &result, &resultlen);
1356 keylen = st->keylen;
1358 rv = yp_next(st->domain, map, key, keylen,
1359 &st->key, &st->keylen, &result,
1367 if (rv == YPERR_NOMORE)
1374 rv = yp_match(st->domain, map, buffer, strlen(buffer),
1375 &result, &resultlen);
1376 if (rv == YPERR_KEY) {
1379 } else if (rv != 0) {
1385 if (resultlen >= bufsize) {
1389 memcpy(buffer, result, resultlen);
1390 buffer[resultlen] = '\0';
1392 rv = __pw_match_entry(buffer, resultlen, how, name, uid);
1393 if (rv == NS_SUCCESS)
1394 rv = __pw_parse_entry(buffer, resultlen, pwd, master,
1396 } while (how == nss_lt_all && !(rv & NS_TERMINATE));
1398 if (rv == NS_SUCCESS) {
1399 if (strstr(pwd->pw_passwd, "##") != NULL) {
1400 rv = nis_adjunct(st->domain, pwd->pw_name,
1401 &buffer[resultlen+1], bufsize-resultlen-1);
1405 pwd->pw_passwd = &buffer[resultlen+1];
1407 pwd->pw_fields &= ~_PWF_SOURCE;
1408 pwd->pw_fields |= _PWF_NIS;
1410 *(struct passwd **)retval = pwd;
1425 compat_clear_template(struct passwd *template)
1428 free(template->pw_passwd);
1429 free(template->pw_gecos);
1430 free(template->pw_dir);
1431 free(template->pw_shell);
1432 memset(template, 0, sizeof(*template));
1437 compat_set_template(struct passwd *src, struct passwd *template)
1440 compat_clear_template(template);
1441 #ifdef PW_OVERRIDE_PASSWD
1442 if ((src->pw_fields & _PWF_PASSWD) &&
1443 (template->pw_passwd = strdup(src->pw_passwd)) == NULL)
1446 if (src->pw_fields & _PWF_UID)
1447 template->pw_uid = src->pw_uid;
1448 if (src->pw_fields & _PWF_GID)
1449 template->pw_gid = src->pw_gid;
1450 if ((src->pw_fields & _PWF_GECOS) &&
1451 (template->pw_gecos = strdup(src->pw_gecos)) == NULL)
1453 if ((src->pw_fields & _PWF_DIR) &&
1454 (template->pw_dir = strdup(src->pw_dir)) == NULL)
1456 if ((src->pw_fields & _PWF_SHELL) &&
1457 (template->pw_shell = strdup(src->pw_shell)) == NULL)
1459 template->pw_fields = src->pw_fields;
1462 syslog(LOG_ERR, "getpwent memory allocation failure");
1468 compat_use_template(struct passwd *pwd, struct passwd *template, char *buffer,
1472 char *copy, *p, *q, *eob;
1475 /* We cannot know the layout of the password fields in `buffer',
1476 * so we have to copy everything.
1478 if (template->pw_fields == 0) /* nothing to fill-in */
1481 n += pwd->pw_name != NULL ? strlen(pwd->pw_name) + 1 : 0;
1482 n += pwd->pw_passwd != NULL ? strlen(pwd->pw_passwd) + 1 : 0;
1483 n += pwd->pw_class != NULL ? strlen(pwd->pw_class) + 1 : 0;
1484 n += pwd->pw_gecos != NULL ? strlen(pwd->pw_gecos) + 1 : 0;
1485 n += pwd->pw_dir != NULL ? strlen(pwd->pw_dir) + 1 : 0;
1486 n += pwd->pw_shell != NULL ? strlen(pwd->pw_shell) + 1 : 0;
1489 syslog(LOG_ERR, "getpwent memory allocation failure");
1494 #define COPY(field) do { \
1495 if (pwd->field == NULL) \
1496 hold.field = NULL; \
1499 p += strlcpy(p, pwd->field, eob-p) + 1; \
1510 eob = &buffer[bufsize];
1511 #define COPY(field, flag) do { \
1512 q = (template->pw_fields & flag) ? template->field : hold.field; \
1514 pwd->field = NULL; \
1517 if ((n = strlcpy(p, q, eob-p)) >= eob-p) { \
1525 #ifdef PW_OVERRIDE_PASSWD
1526 COPY(pw_passwd, _PWF_PASSWD);
1531 COPY(pw_gecos, _PWF_GECOS);
1532 COPY(pw_dir, _PWF_DIR);
1533 COPY(pw_shell, _PWF_SHELL);
1535 #define COPY(field, flag) do { \
1536 if (template->pw_fields & flag) \
1537 pwd->field = template->field; \
1539 COPY(pw_uid, _PWF_UID);
1540 COPY(pw_gid, _PWF_GID);
1548 compat_exclude(const char *name, DB **db)
1553 (*db = dbopen(NULL, O_RDWR, 600, DB_HASH, 0)) == NULL)
1555 key.size = strlen(name);
1556 key.data = (char *)name;
1560 if ((*db)->put(*db, &key, &data, 0) == -1)
1567 compat_is_excluded(const char *name, DB *db)
1573 key.size = strlen(name);
1574 key.data = (char *)name;
1575 return (db->get(db, &key, &data, 0) == 0);
1580 compat_redispatch(struct compat_state *st, enum nss_lookup_type how,
1581 enum nss_lookup_type lookup_how, const char *name, const char *lookup_name,
1582 uid_t uid, struct passwd *pwd, char *buffer, size_t bufsize, int *errnop)
1584 static const ns_src compatsrc[] = {
1586 { NSSRC_NIS, NS_SUCCESS },
1592 { NSSRC_NIS, nis_passwd, NULL },
1595 { NSSRC_DNS, dns_passwd, NULL },
1597 { NULL, NULL, NULL }
1602 for (i = 0; i < (int)(nitems(dtab) - 1); i++)
1603 dtab[i].mdata = (void *)lookup_how;
1606 switch (lookup_how) {
1608 rv = _nsdispatch(&discard, dtab, NSDB_PASSWD_COMPAT,
1609 "getpwent_r", compatsrc, pwd, buffer, bufsize,
1613 rv = _nsdispatch(&discard, dtab, NSDB_PASSWD_COMPAT,
1614 "getpwuid_r", compatsrc, uid, pwd, buffer,
1618 rv = _nsdispatch(&discard, dtab, NSDB_PASSWD_COMPAT,
1619 "getpwnam_r", compatsrc, lookup_name, pwd, buffer,
1623 return (NS_UNAVAIL);
1625 if (rv != NS_SUCCESS)
1627 if (compat_is_excluded(pwd->pw_name, st->exclude)) {
1628 if (how == nss_lt_all)
1630 return (NS_NOTFOUND);
1632 e = compat_use_template(pwd, &st->template, buffer, bufsize);
1638 return (NS_UNAVAIL);
1642 if (strcmp(name, pwd->pw_name) != 0)
1643 return (NS_NOTFOUND);
1646 if (uid != pwd->pw_uid)
1647 return (NS_NOTFOUND);
1652 return (NS_SUCCESS);
1657 compat_endstate(void *p)
1659 struct compat_state *st;
1663 st = (struct compat_state *)p;
1665 st->db->close(st->db);
1666 if (st->exclude != NULL)
1667 st->exclude->close(st->exclude);
1668 compat_clear_template(&st->template);
1674 compat_setpwent(void *retval, void *mdata, va_list ap)
1676 static const ns_src compatsrc[] = {
1678 { NSSRC_NIS, NS_SUCCESS },
1684 { NSSRC_NIS, nis_setpwent, NULL },
1687 { NSSRC_DNS, dns_setpwent, NULL },
1689 { NULL, NULL, NULL }
1691 struct compat_state *st;
1694 #define set_setent(x, y) do { \
1696 for (i = 0; i < (int)(nitems(x) - 1); i++) \
1697 x[i].mdata = (void *)y; \
1700 rv = compat_getstate(&st);
1702 return (NS_UNAVAIL);
1703 switch ((enum constants)(uintptr_t)mdata) {
1705 stayopen = va_arg(ap, int);
1708 st->db = pwdbopen(&st->version);
1709 st->stayopen = stayopen;
1710 set_setent(dtab, mdata);
1711 (void)_nsdispatch(NULL, dtab, NSDB_PASSWD_COMPAT, "setpwent",
1715 if (st->db != NULL) {
1716 (void)st->db->close(st->db);
1719 set_setent(dtab, mdata);
1720 (void)_nsdispatch(NULL, dtab, NSDB_PASSWD_COMPAT, "endpwent",
1726 return (NS_UNAVAIL);
1732 compat_passwd(void *retval, void *mdata, va_list ap)
1734 char keybuf[MAXLOGNAME + 1];
1737 struct compat_state *st;
1738 enum nss_lookup_type how;
1741 char *buffer, *pw_name;
1742 char *host, *user, *domain;
1746 int rv, from_compat, stayopen, *errnop;
1751 how = (enum nss_lookup_type)(uintptr_t)mdata;
1754 name = va_arg(ap, const char *);
1757 uid = va_arg(ap, uid_t);
1765 pwd = va_arg(ap, struct passwd *);
1766 buffer = va_arg(ap, char *);
1767 bufsize = va_arg(ap, size_t);
1768 errnop = va_arg(ap, int *);
1769 *errnop = compat_getstate(&st);
1771 return (NS_UNAVAIL);
1772 if (how == nss_lt_all && st->keynum < 0) {
1776 if (st->db == NULL &&
1777 (st->db = pwdbopen(&st->version)) == NULL) {
1782 if (how == nss_lt_all) {
1783 if (st->keynum < 0) {
1787 keynum = st->keynum;
1791 stayopen = st->stayopen;
1795 switch (st->compat) {
1796 case COMPAT_MODE_ALL:
1797 rv = compat_redispatch(st, how, how, name, name, uid, pwd,
1798 buffer, bufsize, errnop);
1799 if (rv != NS_SUCCESS)
1800 st->compat = COMPAT_MODE_OFF;
1802 case COMPAT_MODE_NETGROUP:
1803 /* XXX getnetgrent is not thread-safe. */
1805 rv = getnetgrent(&host, &user, &domain);
1808 st->compat = COMPAT_MODE_OFF;
1811 } else if (user == NULL || user[0] == '\0')
1813 rv = compat_redispatch(st, how, nss_lt_name, name,
1814 user, uid, pwd, buffer, bufsize, errnop);
1815 } while (st->compat == COMPAT_MODE_NETGROUP &&
1816 !(rv & NS_TERMINATE));
1818 case COMPAT_MODE_NAME:
1819 rv = compat_redispatch(st, how, nss_lt_name, name, st->name,
1820 uid, pwd, buffer, bufsize, errnop);
1823 st->compat = COMPAT_MODE_OFF;
1828 if (rv & NS_TERMINATE) {
1834 while (keynum >= 0) {
1836 if (st->version < _PWD_CURRENT_VERSION) {
1837 memcpy(&keybuf[1], &keynum, sizeof(keynum));
1838 key.size = sizeof(keynum) + 1;
1840 store = htonl(keynum);
1841 memcpy(&keybuf[1], &store, sizeof(store));
1842 key.size = sizeof(store) + 1;
1844 keybuf[0] = _PW_VERSIONED(_PW_KEYBYNUM, st->version);
1845 rv = st->db->get(st->db, &key, &entry, 0);
1846 if (rv < 0 || rv > 1) { /* should never return > 1 */
1850 } else if (rv == 1) {
1855 pw_name = (char *)entry.data;
1856 switch (pw_name[0]) {
1858 switch (pw_name[1]) {
1860 st->compat = COMPAT_MODE_ALL;
1863 setnetgrent(&pw_name[2]);
1864 st->compat = COMPAT_MODE_NETGROUP;
1867 st->name = strdup(&pw_name[1]);
1868 if (st->name == NULL) {
1870 "getpwent memory allocation failure");
1875 st->compat = COMPAT_MODE_NAME;
1877 if (entry.size > bufsize) {
1882 memcpy(buffer, entry.data, entry.size);
1883 rv = pwdb_versions[st->version].parse(buffer,
1884 entry.size, pwd, errnop);
1885 if (rv != NS_SUCCESS)
1887 else if (compat_set_template(pwd, &st->template) < 0) {
1894 switch (pw_name[1]) {
1896 /* XXX Maybe syslog warning */
1899 setnetgrent(&pw_name[2]);
1900 while (getnetgrent(&host, &user, &domain) !=
1902 if (user != NULL && user[0] != '\0')
1903 compat_exclude(user,
1909 compat_exclude(&pw_name[1], &st->exclude);
1916 if (compat_is_excluded((char *)entry.data, st->exclude))
1918 rv = pwdb_versions[st->version].match(entry.data, entry.size,
1920 if (rv == NS_RETURN)
1922 else if (rv != NS_SUCCESS)
1924 if (entry.size > bufsize) {
1929 memcpy(buffer, entry.data, entry.size);
1930 rv = pwdb_versions[st->version].parse(buffer, entry.size, pwd,
1932 if (rv & NS_TERMINATE)
1936 if (how == nss_lt_all)
1937 st->keynum = keynum;
1938 if (st->db != NULL && !stayopen) {
1939 (void)st->db->close(st->db);
1942 if (rv == NS_SUCCESS) {
1944 pwd->pw_fields &= ~_PWF_SOURCE;
1945 pwd->pw_fields |= _PWF_FILES;
1948 *(struct passwd **)retval = pwd;
1955 * common passwd line matching and parsing
1958 __pw_match_entry(const char *entry, size_t entrysize, enum nss_lookup_type how,
1959 const char *name, uid_t uid)
1961 const char *p, *eom;
1966 eom = entry + entrysize;
1967 for (p = entry; p < eom; p++)
1971 return (NS_NOTFOUND);
1972 if (how == nss_lt_all)
1973 return (NS_SUCCESS);
1974 if (how == nss_lt_name) {
1976 if (len == (p - entry) && memcmp(name, entry, len) == 0)
1977 return (NS_SUCCESS);
1979 return (NS_NOTFOUND);
1981 for (p++; p < eom; p++)
1985 return (NS_NOTFOUND);
1986 m = strtoul(++p, &q, 10);
1987 if (q[0] != ':' || (uid_t)m != uid)
1988 return (NS_NOTFOUND);
1990 return (NS_SUCCESS);
1994 /* XXX buffer must be NUL-terminated. errnop is not set correctly. */
1996 __pw_parse_entry(char *buffer, size_t bufsize __unused, struct passwd *pwd,
1997 int master, int *errnop __unused)
2000 if (__pw_scan(buffer, pwd, master ? _PWSCAN_MASTER : 0) == 0)
2001 return (NS_NOTFOUND);
2003 return (NS_SUCCESS);