2 * Copyright (c) 2003 Networks Associates Technology, Inc.
5 * This software was developed for the FreeBSD Project by
6 * Jacques A. Vidrine, Safeport Network Services, and Network
7 * Associates Laboratories, the Security Research Division of Network
8 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
9 * ("CBOSS"), as part of the DARPA CHATS research program.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * $FreeBSD: src/lib/libc/gen/getpwent.c,v 1.90 2006/04/28 12:03:35 ume Exp $
33 * $DragonFly: src/lib/libc/gen/getpwent.c,v 1.7 2005/11/19 22:32:53 swildner Exp $
36 #include "namespace.h"
37 #include <sys/param.h>
40 #include <rpcsvc/yp_prot.h>
41 #include <rpcsvc/ypclnt.h>
43 #include <arpa/inet.h>
52 #include <pthread_np.h>
59 #include "un-namespace.h"
61 #include "libc_private.h"
69 #define CTASSERT(x) _CTASSERT(x, __LINE__)
70 #define _CTASSERT(x, y) __CTASSERT(x, y)
71 #define __CTASSERT(x, y) typedef char __assert_ ## y [(x) ? 1 : -1]
74 /* Counter as stored in /etc/pwd.db */
77 CTASSERT(MAXLOGNAME > sizeof(uid_t));
78 CTASSERT(MAXLOGNAME > sizeof(pwkeynum));
81 PWD_STORAGE_INITIAL = 1 << 10, /* 1 KByte */
82 PWD_STORAGE_MAX = 1 << 20, /* 1 MByte */
88 static const ns_src defaultsrc[] = {
89 { NSSRC_COMPAT, NS_SUCCESS },
93 int __pw_match_entry(const char *, size_t, enum nss_lookup_type,
95 int __pw_parse_entry(char *, size_t, struct passwd *, int, int *errnop);
97 static void pwd_init(struct passwd *);
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)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,
264 size_t orig_buf_size;
266 struct passwd new_pwd;
267 size_t desired_size, size;
270 switch ((enum nss_lookup_type)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)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 *);
393 buffer_size - sizeof(struct passwd) - sizeof(char *)) {
398 memcpy(pwd, buffer, sizeof(struct passwd));
399 memcpy(&p, buffer + sizeof(struct passwd), sizeof(char *));
400 memcpy(orig_buf, buffer + sizeof(struct passwd) + sizeof(char *),
401 buffer_size - sizeof(struct passwd) - sizeof(char *));
403 NS_APPLY_OFFSET(pwd->pw_name, orig_buf, p, char *);
404 NS_APPLY_OFFSET(pwd->pw_passwd, orig_buf, p, char *);
405 NS_APPLY_OFFSET(pwd->pw_class, orig_buf, p, char *);
406 NS_APPLY_OFFSET(pwd->pw_gecos, orig_buf, p, char *);
407 NS_APPLY_OFFSET(pwd->pw_dir, orig_buf, p, char *);
408 NS_APPLY_OFFSET(pwd->pw_shell, orig_buf, p, char *);
411 *((struct passwd **)retval) = pwd;
416 NSS_MP_CACHE_HANDLING(passwd);
417 #endif /* NS_CACHING */
423 static const nss_cache_info cache_info = NS_MP_CACHE_INFO_INITIALIZER(
424 passwd, (void *)nss_lt_all,
428 static const ns_dtab dtab[] = {
429 { NSSRC_FILES, files_setpwent, (void *)SETPWENT },
431 { NSSRC_DNS, dns_setpwent, (void *)SETPWENT },
434 { NSSRC_NIS, nis_setpwent, (void *)SETPWENT },
436 { NSSRC_COMPAT, compat_setpwent, (void *)SETPWENT },
438 NS_CACHE_CB(&cache_info)
442 _nsdispatch(NULL, dtab, NSDB_PASSWD, "setpwent", defaultsrc, 0);
447 setpassent(int stayopen)
450 static const nss_cache_info cache_info = NS_MP_CACHE_INFO_INITIALIZER(
451 passwd, (void *)nss_lt_all,
455 static const ns_dtab dtab[] = {
456 { NSSRC_FILES, files_setpwent, (void *)SETPWENT },
458 { NSSRC_DNS, dns_setpwent, (void *)SETPWENT },
461 { NSSRC_NIS, nis_setpwent, (void *)SETPWENT },
463 { NSSRC_COMPAT, compat_setpwent, (void *)SETPWENT },
465 NS_CACHE_CB(&cache_info)
469 _nsdispatch(NULL, dtab, NSDB_PASSWD, "setpwent", defaultsrc, stayopen);
478 static const nss_cache_info cache_info = NS_MP_CACHE_INFO_INITIALIZER(
479 passwd, (void *)nss_lt_all,
483 static const ns_dtab dtab[] = {
484 { NSSRC_FILES, files_setpwent, (void *)ENDPWENT },
486 { NSSRC_DNS, dns_setpwent, (void *)ENDPWENT },
489 { NSSRC_NIS, nis_setpwent, (void *)ENDPWENT },
491 { NSSRC_COMPAT, compat_setpwent, (void *)ENDPWENT },
493 NS_CACHE_CB(&cache_info)
497 _nsdispatch(NULL, dtab, NSDB_PASSWD, "endpwent", defaultsrc);
502 getpwent_r(struct passwd *pwd, char *buffer, size_t bufsize,
503 struct passwd **result)
506 static const nss_cache_info cache_info = NS_MP_CACHE_INFO_INITIALIZER(
507 passwd, (void *)nss_lt_all,
508 pwd_marshal_func, pwd_unmarshal_func);
511 static const ns_dtab dtab[] = {
512 { NSSRC_FILES, files_passwd, (void *)nss_lt_all },
514 { NSSRC_DNS, dns_passwd, (void *)nss_lt_all },
517 { NSSRC_NIS, nis_passwd, (void *)nss_lt_all },
519 { NSSRC_COMPAT, compat_passwd, (void *)nss_lt_all },
521 NS_CACHE_CB(&cache_info)
530 rv = _nsdispatch(result, dtab, NSDB_PASSWD, "getpwent_r", defaultsrc,
531 pwd, buffer, bufsize, &ret_errno);
532 if (rv == NS_SUCCESS)
540 getpwnam_r(const char *name, struct passwd *pwd, char *buffer, size_t bufsize,
541 struct passwd **result)
544 static const nss_cache_info cache_info =
545 NS_COMMON_CACHE_INFO_INITIALIZER(
546 passwd, (void *)nss_lt_name,
547 pwd_id_func, pwd_marshal_func, pwd_unmarshal_func);
550 static const ns_dtab dtab[] = {
551 { NSSRC_FILES, files_passwd, (void *)nss_lt_name },
553 { NSSRC_DNS, dns_passwd, (void *)nss_lt_name },
556 { NSSRC_NIS, nis_passwd, (void *)nss_lt_name },
558 { NSSRC_COMPAT, compat_passwd, (void *)nss_lt_name },
560 NS_CACHE_CB(&cache_info)
569 rv = _nsdispatch(result, dtab, NSDB_PASSWD, "getpwnam_r", defaultsrc,
570 name, pwd, buffer, bufsize, &ret_errno);
571 if (rv == NS_SUCCESS)
579 getpwuid_r(uid_t uid, struct passwd *pwd, char *buffer, size_t bufsize,
580 struct passwd **result)
583 static const nss_cache_info cache_info =
584 NS_COMMON_CACHE_INFO_INITIALIZER(
585 passwd, (void *)nss_lt_id,
586 pwd_id_func, pwd_marshal_func, pwd_unmarshal_func);
589 static const ns_dtab dtab[] = {
590 { NSSRC_FILES, files_passwd, (void *)nss_lt_id },
592 { NSSRC_DNS, dns_passwd, (void *)nss_lt_id },
595 { NSSRC_NIS, nis_passwd, (void *)nss_lt_id },
597 { NSSRC_COMPAT, compat_passwd, (void *)nss_lt_id },
599 NS_CACHE_CB(&cache_info)
608 rv = _nsdispatch(result, dtab, NSDB_PASSWD, "getpwuid_r", defaultsrc,
609 uid, pwd, buffer, bufsize, &ret_errno);
610 if (rv == NS_SUCCESS)
618 pwd_init(struct passwd *pwd)
620 static char nul[] = "";
622 memset(pwd, 0, sizeof(*pwd));
623 pwd->pw_uid = (uid_t)-1; /* Considered least likely to lead to */
624 pwd->pw_gid = (gid_t)-1; /* a security issue. */
626 pwd->pw_passwd = nul;
634 static struct passwd pwd;
635 static char *pwd_storage;
636 static size_t pwd_storage_size;
639 static struct passwd *
640 getpw(int (*fn)(union key, struct passwd *, char *, size_t, struct passwd **),
646 if (pwd_storage == NULL) {
647 pwd_storage = malloc(PWD_STORAGE_INITIAL);
648 if (pwd_storage == NULL)
650 pwd_storage_size = PWD_STORAGE_INITIAL;
653 rv = fn(key, &pwd, pwd_storage, pwd_storage_size, &res);
654 if (res == NULL && rv == ERANGE) {
656 if ((pwd_storage_size << 1) > PWD_STORAGE_MAX) {
661 pwd_storage_size <<= 1;
662 pwd_storage = malloc(pwd_storage_size);
663 if (pwd_storage == NULL)
666 } while (res == NULL && rv == ERANGE);
674 wrap_getpwnam_r(union key key, struct passwd *pwd, char *buffer,
675 size_t bufsize, struct passwd **res)
677 return (getpwnam_r(key.name, pwd, buffer, bufsize, res));
682 wrap_getpwuid_r(union key key, struct passwd *pwd, char *buffer,
683 size_t bufsize, struct passwd **res)
685 return (getpwuid_r(key.uid, pwd, buffer, bufsize, res));
690 wrap_getpwent_r(union key key __unused, struct passwd *pwd, char *buffer,
691 size_t bufsize, struct passwd **res)
693 return (getpwent_r(pwd, buffer, bufsize, res));
698 getpwnam(const char *name)
703 return (getpw(wrap_getpwnam_r, key));
713 return (getpw(wrap_getpwuid_r, key));
722 key.uid = 0; /* not used */
723 return (getpw(wrap_getpwent_r, key));
731 pwdbopen(int *version)
737 if (geteuid() != 0 ||
738 (res = dbopen(_PATH_SMP_DB, O_RDONLY, 0, DB_HASH, NULL)) == NULL)
739 res = dbopen(_PATH_MP_DB, O_RDONLY, 0, DB_HASH, NULL);
742 key.data = _PWD_VERSION_KEY;
743 key.size = strlen(_PWD_VERSION_KEY);
744 rv = res->get(res, &key, &entry, 0);
746 *version = *(unsigned char *)entry.data;
750 *version >= sizeof(pwdb_versions)/sizeof(pwdb_versions[0])) {
751 syslog(LOG_CRIT, "Unsupported password database version %d",
761 files_endstate(void *p)
767 db = ((struct files_state *)p)->db;
775 files_setpwent(void *retval, void *mdata, va_list ap)
777 struct files_state *st;
780 rv = files_getstate(&st);
783 switch ((enum constants)mdata) {
785 stayopen = va_arg(ap, int);
788 st->db = pwdbopen(&st->version);
789 st->stayopen = stayopen;
792 if (st->db != NULL) {
793 st->db->close(st->db);
805 files_passwd(void *retval, void *mdata, va_list ap)
807 char keybuf[MAXLOGNAME + 1];
809 struct files_state *st;
810 enum nss_lookup_type how;
814 size_t bufsize, namesize;
817 int rv, stayopen, *errnop;
821 how = (enum nss_lookup_type)mdata;
824 name = va_arg(ap, const char *);
825 keybuf[0] = _PW_KEYBYNAME;
828 uid = va_arg(ap, uid_t);
829 keybuf[0] = _PW_KEYBYUID;
832 keybuf[0] = _PW_KEYBYNUM;
838 pwd = va_arg(ap, struct passwd *);
839 buffer = va_arg(ap, char *);
840 bufsize = va_arg(ap, size_t);
841 errnop = va_arg(ap, int *);
842 *errnop = files_getstate(&st);
845 if (how == nss_lt_all && st->keynum < 0) {
849 if (st->db == NULL &&
850 (st->db = pwdbopen(&st->version)) == NULL) {
855 if (how == nss_lt_all)
858 stayopen = st->stayopen;
863 /* MAXLOGNAME includes NUL byte, but we do not
864 * include the NUL byte in the key.
866 namesize = strlcpy(&keybuf[1], name, sizeof(keybuf)-1);
867 if (namesize >= sizeof(keybuf)-1) {
872 key.size = namesize + 1;
875 if (st->version < _PWD_CURRENT_VERSION) {
876 memcpy(&keybuf[1], &uid, sizeof(uid));
877 key.size = sizeof(uid) + 1;
880 memcpy(&keybuf[1], &store, sizeof(store));
881 key.size = sizeof(store) + 1;
886 if (st->version < _PWD_CURRENT_VERSION) {
887 memcpy(&keybuf[1], &st->keynum,
889 key.size = sizeof(st->keynum) + 1;
891 store = htonl(st->keynum);
892 memcpy(&keybuf[1], &store, sizeof(store));
893 key.size = sizeof(store) + 1;
897 keybuf[0] = _PW_VERSIONED(keybuf[0], st->version);
898 rv = st->db->get(st->db, &key, &entry, 0);
899 if (rv < 0 || rv > 1) { /* should never return > 1 */
903 } else if (rv == 1) {
904 if (how == nss_lt_all)
909 rv = pwdb_versions[st->version].match(entry.data, entry.size,
911 if (rv != NS_SUCCESS)
913 if (entry.size > bufsize) {
918 memcpy(buffer, entry.data, entry.size);
919 rv = pwdb_versions[st->version].parse(buffer, entry.size, pwd,
921 } while (how == nss_lt_all && !(rv & NS_TERMINATE));
923 if (!stayopen && st->db != NULL) {
924 st->db->close(st->db);
927 if (rv == NS_SUCCESS) {
928 pwd->pw_fields &= ~_PWF_SOURCE;
929 pwd->pw_fields |= _PWF_FILES;
931 *(struct passwd **)retval = pwd;
938 pwdb_match_entry_v3(char *entry, size_t entrysize, enum nss_lookup_type how,
939 const char *name, uid_t uid)
944 eom = &entry[entrysize];
945 for (p = entry; p < eom; p++)
949 return (NS_NOTFOUND);
950 if (how == nss_lt_all)
952 if (how == nss_lt_name)
953 return (strcmp(name, entry) == 0 ? NS_SUCCESS : NS_NOTFOUND);
954 for (p++; p < eom; p++)
957 if (*p != '\0' || (++p) + sizeof(uid) >= eom)
958 return (NS_NOTFOUND);
959 memcpy(&uid2, p, sizeof(uid2));
960 return (uid == uid2 ? NS_SUCCESS : NS_NOTFOUND);
965 pwdb_parse_entry_v3(char *buffer, size_t bufsize, struct passwd *pwd,
969 int32_t pw_change, pw_expire;
971 /* THIS CODE MUST MATCH THAT IN pwd_mkdb. */
973 eom = &buffer[bufsize];
974 #define STRING(field) do { \
976 while (p < eom && *p != '\0') \
979 return (NS_NOTFOUND); \
982 #define SCALAR(field) do { \
983 if (p + sizeof(field) > eom) \
984 return (NS_NOTFOUND); \
985 memcpy(&(field), p, sizeof(field)); \
986 p += sizeof(field); \
988 STRING(pwd->pw_name);
989 STRING(pwd->pw_passwd);
993 STRING(pwd->pw_class);
994 STRING(pwd->pw_gecos);
996 STRING(pwd->pw_shell);
998 SCALAR(pwd->pw_fields);
1001 pwd->pw_change = pw_change;
1002 pwd->pw_expire = pw_expire;
1003 return (NS_SUCCESS);
1008 pwdb_match_entry_v4(char *entry, size_t entrysize, enum nss_lookup_type how,
1009 const char *name, uid_t uid)
1011 const char *p, *eom;
1014 eom = &entry[entrysize];
1015 for (p = entry; p < eom; p++)
1019 return (NS_NOTFOUND);
1020 if (how == nss_lt_all)
1021 return (NS_SUCCESS);
1022 if (how == nss_lt_name)
1023 return (strcmp(name, entry) == 0 ? NS_SUCCESS : NS_NOTFOUND);
1024 for (p++; p < eom; p++)
1027 if (*p != '\0' || (++p) + sizeof(uid) >= eom)
1028 return (NS_NOTFOUND);
1029 memcpy(&uid2, p, sizeof(uid2));
1031 return (uid == (uid_t)uid2 ? NS_SUCCESS : NS_NOTFOUND);
1036 pwdb_parse_entry_v4(char *buffer, size_t bufsize, struct passwd *pwd,
1042 /* THIS CODE MUST MATCH THAT IN pwd_mkdb. */
1044 eom = &buffer[bufsize];
1045 #define STRING(field) do { \
1047 while (p < eom && *p != '\0') \
1050 return (NS_NOTFOUND); \
1053 #define SCALAR(field) do { \
1054 if (p + sizeof(n) > eom) \
1055 return (NS_NOTFOUND); \
1056 memcpy(&n, p, sizeof(n)); \
1057 (field) = ntohl(n); \
1060 STRING(pwd->pw_name);
1061 STRING(pwd->pw_passwd);
1062 SCALAR(pwd->pw_uid);
1063 SCALAR(pwd->pw_gid);
1064 SCALAR(pwd->pw_change);
1065 STRING(pwd->pw_class);
1066 STRING(pwd->pw_gecos);
1067 STRING(pwd->pw_dir);
1068 STRING(pwd->pw_shell);
1069 SCALAR(pwd->pw_expire);
1070 SCALAR(pwd->pw_fields);
1073 return (NS_SUCCESS);
1082 dns_endstate(void *p)
1089 dns_setpwent(void *retval, void *mdata, va_list ap)
1091 struct dns_state *st;
1094 rv = dns_getstate(&st);
1096 return (NS_UNAVAIL);
1098 return (NS_UNAVAIL);
1103 dns_passwd(void *retval, void *mdata, va_list ap)
1105 char buf[HESIOD_NAME_MAX];
1106 struct dns_state *st;
1108 const char *name, *label;
1110 char *buffer, **hes;
1111 size_t bufsize, linesize;
1113 enum nss_lookup_type how;
1120 how = (enum nss_lookup_type)mdata;
1123 name = va_arg(ap, const char *);
1126 uid = va_arg(ap, uid_t);
1131 pwd = va_arg(ap, struct passwd *);
1132 buffer = va_arg(ap, char *);
1133 bufsize = va_arg(ap, size_t);
1134 errnop = va_arg(ap, int *);
1135 *errnop = dns_getstate(&st);
1137 return (NS_UNAVAIL);
1138 if (hesiod_init(&ctx) != 0) {
1150 if (snprintf(buf, sizeof(buf), "%lu",
1151 (unsigned long)uid) >= sizeof(buf))
1156 if (st->counter < 0)
1158 if (snprintf(buf, sizeof(buf), "passwd-%ld",
1159 st->counter++) >= sizeof(buf))
1164 hes = hesiod_resolve(ctx, label,
1165 how == nss_lt_id ? "uid" : "passwd");
1167 if (how == nss_lt_all)
1169 if (errno != ENOENT)
1173 rv = __pw_match_entry(hes[0], strlen(hes[0]), how, name, uid);
1174 if (rv != NS_SUCCESS) {
1175 hesiod_free_list(ctx, hes);
1179 linesize = strlcpy(buffer, hes[0], bufsize);
1180 if (linesize >= bufsize) {
1185 hesiod_free_list(ctx, hes);
1187 rv = __pw_parse_entry(buffer, bufsize, pwd, 0, errnop);
1188 } while (how == nss_lt_all && !(rv & NS_TERMINATE));
1191 hesiod_free_list(ctx, hes);
1194 if (rv == NS_SUCCESS) {
1195 pwd->pw_fields &= ~_PWF_SOURCE;
1196 pwd->pw_fields |= _PWF_HESIOD;
1198 *(struct passwd **)retval = pwd;
1210 nis_endstate(void *p)
1212 free(((struct nis_state *)p)->key);
1217 * Test for the presence of special FreeBSD-specific master.passwd.by*
1218 * maps. We do this using yp_order(). If it fails, then either the server
1219 * doesn't have the map, or the YPPROC_ORDER procedure isn't supported by
1220 * the server (Sun NIS+ servers in YP compat mode behave this way). If
1221 * the master.passwd.by* maps don't exist, then let the lookup routine try
1222 * the regular passwd.by* maps instead. If the lookup routine fails, it
1223 * can return an error as needed.
1226 nis_map(char *domain, enum nss_lookup_type how, char *buffer, size_t bufsize,
1232 if (geteuid() == 0) {
1233 if (snprintf(buffer, bufsize, "master.passwd.by%s",
1234 (how == nss_lt_id) ? "uid" : "name") >= bufsize)
1235 return (NS_UNAVAIL);
1236 rv = yp_order(domain, buffer, &order);
1239 return (NS_SUCCESS);
1243 if (snprintf(buffer, bufsize, "passwd.by%s",
1244 (how == nss_lt_id) ? "uid" : "name") >= bufsize)
1245 return (NS_UNAVAIL);
1247 return (NS_SUCCESS);
1252 nis_adjunct(char *domain, const char *name, char *buffer, size_t bufsize)
1255 char *result, *p, *q, *eor;
1259 rv = yp_match(domain, "passwd.adjunct.byname", name, strlen(name),
1260 &result, &resultlen);
1264 eor = &result[resultlen];
1265 p = memchr(result, ':', eor - result);
1266 if (p != NULL && ++p < eor &&
1267 (q = memchr(p, ':', eor - p)) != NULL) {
1268 if (q - p >= bufsize)
1271 memcpy(buffer, p, q - p);
1272 buffer[q - p] ='\0';
1283 nis_setpwent(void *retval, void *mdata, va_list ap)
1285 struct nis_state *st;
1288 rv = nis_getstate(&st);
1290 return (NS_UNAVAIL);
1294 return (NS_UNAVAIL);
1299 nis_passwd(void *retval, void *mdata, va_list ap)
1302 struct nis_state *st;
1305 char *buffer, *key, *result;
1308 enum nss_lookup_type how;
1309 int *errnop, keylen, resultlen, rv, master;
1313 how = (enum nss_lookup_type)mdata;
1316 name = va_arg(ap, const char *);
1319 uid = va_arg(ap, uid_t);
1324 pwd = va_arg(ap, struct passwd *);
1325 buffer = va_arg(ap, char *);
1326 bufsize = va_arg(ap, size_t);
1327 errnop = va_arg(ap, int *);
1328 *errnop = nis_getstate(&st);
1330 return (NS_UNAVAIL);
1331 if (st->domain[0] == '\0') {
1332 if (getdomainname(st->domain, sizeof(st->domain)) != 0) {
1334 return (NS_UNAVAIL);
1337 rv = nis_map(st->domain, how, map, sizeof(map), &master);
1338 if (rv != NS_SUCCESS)
1345 if (strlcpy(buffer, name, bufsize) >= bufsize)
1349 if (snprintf(buffer, bufsize, "%lu",
1350 (unsigned long)uid) >= bufsize)
1359 if (how == nss_lt_all) {
1360 if (st->key == NULL)
1361 rv = yp_first(st->domain, map, &st->key,
1362 &st->keylen, &result, &resultlen);
1365 keylen = st->keylen;
1367 rv = yp_next(st->domain, map, key, keylen,
1368 &st->key, &st->keylen, &result,
1376 if (rv == YPERR_NOMORE)
1383 rv = yp_match(st->domain, map, buffer, strlen(buffer),
1384 &result, &resultlen);
1385 if (rv == YPERR_KEY) {
1388 } else if (rv != 0) {
1394 if (resultlen >= bufsize)
1396 memcpy(buffer, result, resultlen);
1397 buffer[resultlen] = '\0';
1399 rv = __pw_match_entry(buffer, resultlen, how, name, uid);
1400 if (rv == NS_SUCCESS)
1401 rv = __pw_parse_entry(buffer, resultlen, pwd, master,
1403 } while (how == nss_lt_all && !(rv & NS_TERMINATE));
1405 if (rv == NS_SUCCESS) {
1406 if (strstr(pwd->pw_passwd, "##") != NULL) {
1407 rv = nis_adjunct(st->domain, pwd->pw_name,
1408 &buffer[resultlen+1], bufsize-resultlen-1);
1412 pwd->pw_passwd = &buffer[resultlen+1];
1414 pwd->pw_fields &= ~_PWF_SOURCE;
1415 pwd->pw_fields |= _PWF_NIS;
1417 *(struct passwd **)retval = pwd;
1432 compat_clear_template(struct passwd *template)
1435 free(template->pw_passwd);
1436 free(template->pw_gecos);
1437 free(template->pw_dir);
1438 free(template->pw_shell);
1439 memset(template, 0, sizeof(*template));
1444 compat_set_template(struct passwd *src, struct passwd *template)
1447 compat_clear_template(template);
1448 #ifdef PW_OVERRIDE_PASSWD
1449 if ((src->pw_fields & _PWF_PASSWD) &&
1450 (template->pw_passwd = strdup(src->pw_passwd)) == NULL)
1453 if (src->pw_fields & _PWF_UID)
1454 template->pw_uid = src->pw_uid;
1455 if (src->pw_fields & _PWF_GID)
1456 template->pw_gid = src->pw_gid;
1457 if ((src->pw_fields & _PWF_GECOS) &&
1458 (template->pw_gecos = strdup(src->pw_gecos)) == NULL)
1460 if ((src->pw_fields & _PWF_DIR) &&
1461 (template->pw_dir = strdup(src->pw_dir)) == NULL)
1463 if ((src->pw_fields & _PWF_SHELL) &&
1464 (template->pw_shell = strdup(src->pw_shell)) == NULL)
1466 template->pw_fields = src->pw_fields;
1469 syslog(LOG_ERR, "getpwent memory allocation failure");
1475 compat_use_template(struct passwd *pwd, struct passwd *template, char *buffer,
1479 char *copy, *p, *q, *eob;
1482 /* We cannot know the layout of the password fields in `buffer',
1483 * so we have to copy everything.
1485 if (template->pw_fields == 0) /* nothing to fill-in */
1488 n += pwd->pw_name != NULL ? strlen(pwd->pw_name) + 1 : 0;
1489 n += pwd->pw_passwd != NULL ? strlen(pwd->pw_passwd) + 1 : 0;
1490 n += pwd->pw_class != NULL ? strlen(pwd->pw_class) + 1 : 0;
1491 n += pwd->pw_gecos != NULL ? strlen(pwd->pw_gecos) + 1 : 0;
1492 n += pwd->pw_dir != NULL ? strlen(pwd->pw_dir) + 1 : 0;
1493 n += pwd->pw_shell != NULL ? strlen(pwd->pw_shell) + 1 : 0;
1496 syslog(LOG_ERR, "getpwent memory allocation failure");
1501 #define COPY(field) do { \
1502 if (pwd->field == NULL) \
1503 hold.field = NULL; \
1506 p += strlcpy(p, pwd->field, eob-p) + 1; \
1517 eob = &buffer[bufsize];
1518 #define COPY(field, flag) do { \
1519 q = (template->pw_fields & flag) ? template->field : hold.field; \
1521 pwd->field = NULL; \
1524 if ((n = strlcpy(p, q, eob-p)) >= eob-p) { \
1532 #ifdef PW_OVERRIDE_PASSWD
1533 COPY(pw_passwd, _PWF_PASSWD);
1538 COPY(pw_gecos, _PWF_GECOS);
1539 COPY(pw_dir, _PWF_DIR);
1540 COPY(pw_shell, _PWF_SHELL);
1542 #define COPY(field, flag) do { \
1543 if (template->pw_fields & flag) \
1544 pwd->field = template->field; \
1546 COPY(pw_uid, _PWF_UID);
1547 COPY(pw_gid, _PWF_GID);
1555 compat_exclude(const char *name, DB **db)
1560 (*db = dbopen(NULL, O_RDWR, 600, DB_HASH, 0)) == NULL)
1562 key.size = strlen(name);
1563 key.data = (char *)name;
1567 if ((*db)->put(*db, &key, &data, 0) == -1)
1574 compat_is_excluded(const char *name, DB *db)
1580 key.size = strlen(name);
1581 key.data = (char *)name;
1582 return (db->get(db, &key, &data, 0) == 0);
1587 compat_redispatch(struct compat_state *st, enum nss_lookup_type how,
1588 enum nss_lookup_type lookup_how, const char *name, const char *lookup_name,
1589 uid_t uid, struct passwd *pwd, char *buffer, size_t bufsize, int *errnop)
1591 static const ns_src compatsrc[] = {
1593 { NSSRC_NIS, NS_SUCCESS },
1599 { NSSRC_NIS, nis_passwd, NULL },
1602 { NSSRC_DNS, dns_passwd, NULL },
1604 { NULL, NULL, NULL }
1609 for (i = 0; i < sizeof(dtab)/sizeof(dtab[0]) - 1; i++)
1610 dtab[i].mdata = (void *)lookup_how;
1613 switch (lookup_how) {
1615 rv = _nsdispatch(&discard, dtab, NSDB_PASSWD_COMPAT,
1616 "getpwent_r", compatsrc, pwd, buffer, bufsize,
1620 rv = _nsdispatch(&discard, dtab, NSDB_PASSWD_COMPAT,
1621 "getpwuid_r", compatsrc, uid, pwd, buffer,
1625 rv = _nsdispatch(&discard, dtab, NSDB_PASSWD_COMPAT,
1626 "getpwnam_r", compatsrc, lookup_name, pwd, buffer,
1630 return (NS_UNAVAIL);
1632 if (rv != NS_SUCCESS)
1634 if (compat_is_excluded(pwd->pw_name, st->exclude)) {
1635 if (how == nss_lt_all)
1637 return (NS_NOTFOUND);
1639 e = compat_use_template(pwd, &st->template, buffer, bufsize);
1645 return (NS_UNAVAIL);
1649 if (strcmp(name, pwd->pw_name) != 0)
1650 return (NS_NOTFOUND);
1653 if (uid != pwd->pw_uid)
1654 return (NS_NOTFOUND);
1659 return (NS_SUCCESS);
1664 compat_endstate(void *p)
1666 struct compat_state *st;
1670 st = (struct compat_state *)p;
1672 st->db->close(st->db);
1673 if (st->exclude != NULL)
1674 st->exclude->close(st->exclude);
1675 compat_clear_template(&st->template);
1681 compat_setpwent(void *retval, void *mdata, va_list ap)
1683 static const ns_src compatsrc[] = {
1685 { NSSRC_NIS, NS_SUCCESS },
1691 { NSSRC_NIS, nis_setpwent, NULL },
1694 { NSSRC_DNS, dns_setpwent, NULL },
1696 { NULL, NULL, NULL }
1698 struct compat_state *st;
1701 #define set_setent(x, y) do { \
1704 for (i = 0; i < (sizeof(x)/sizeof(x[0])) - 1; i++) \
1705 x[i].mdata = (void *)y; \
1708 rv = compat_getstate(&st);
1710 return (NS_UNAVAIL);
1711 switch ((enum constants)mdata) {
1713 stayopen = va_arg(ap, int);
1716 st->db = pwdbopen(&st->version);
1717 st->stayopen = stayopen;
1718 set_setent(dtab, mdata);
1719 _nsdispatch(NULL, dtab, NSDB_PASSWD_COMPAT, "setpwent",
1723 if (st->db != NULL) {
1724 st->db->close(st->db);
1727 set_setent(dtab, mdata);
1728 _nsdispatch(NULL, dtab, NSDB_PASSWD_COMPAT, "endpwent",
1734 return (NS_UNAVAIL);
1740 compat_passwd(void *retval, void *mdata, va_list ap)
1742 char keybuf[MAXLOGNAME + 1];
1744 struct compat_state *st;
1745 enum nss_lookup_type how;
1748 char *buffer, *pw_name;
1749 char *host, *user, *domain;
1753 int rv, from_compat, stayopen, *errnop;
1758 how = (enum nss_lookup_type)mdata;
1761 name = va_arg(ap, const char *);
1764 uid = va_arg(ap, uid_t);
1772 pwd = va_arg(ap, struct passwd *);
1773 buffer = va_arg(ap, char *);
1774 bufsize = va_arg(ap, size_t);
1775 errnop = va_arg(ap, int *);
1776 *errnop = compat_getstate(&st);
1778 return (NS_UNAVAIL);
1779 if (how == nss_lt_all && st->keynum < 0) {
1783 if (st->db == NULL &&
1784 (st->db = pwdbopen(&st->version)) == NULL) {
1789 if (how == nss_lt_all) {
1790 if (st->keynum < 0) {
1797 stayopen = st->stayopen;
1801 switch (st->compat) {
1802 case COMPAT_MODE_ALL:
1803 rv = compat_redispatch(st, how, how, name, name, uid, pwd,
1804 buffer, bufsize, errnop);
1805 if (rv != NS_SUCCESS)
1806 st->compat = COMPAT_MODE_OFF;
1808 case COMPAT_MODE_NETGROUP:
1809 /* XXX getnetgrent is not thread-safe. */
1811 rv = getnetgrent(&host, &user, &domain);
1814 st->compat = COMPAT_MODE_OFF;
1817 } else if (user == NULL || user[0] == '\0')
1819 rv = compat_redispatch(st, how, nss_lt_name, name,
1820 user, uid, pwd, buffer, bufsize, errnop);
1821 } while (st->compat == COMPAT_MODE_NETGROUP &&
1822 !(rv & NS_TERMINATE));
1824 case COMPAT_MODE_NAME:
1825 rv = compat_redispatch(st, how, nss_lt_name, name, st->name,
1826 uid, pwd, buffer, bufsize, errnop);
1829 st->compat = COMPAT_MODE_OFF;
1834 if (rv & NS_TERMINATE) {
1840 while (st->keynum >= 0) {
1842 if (st->version < _PWD_CURRENT_VERSION) {
1843 memcpy(&keybuf[1], &st->keynum, sizeof(st->keynum));
1844 key.size = sizeof(st->keynum) + 1;
1846 store = htonl(st->keynum);
1847 memcpy(&keybuf[1], &store, sizeof(store));
1848 key.size = sizeof(store) + 1;
1850 keybuf[0] = _PW_VERSIONED(_PW_KEYBYNUM, st->version);
1851 rv = st->db->get(st->db, &key, &entry, 0);
1852 if (rv < 0 || rv > 1) { /* should never return > 1 */
1856 } else if (rv == 1) {
1861 pw_name = (char *)entry.data;
1862 switch (pw_name[0]) {
1864 switch (pw_name[1]) {
1866 st->compat = COMPAT_MODE_ALL;
1869 setnetgrent(&pw_name[2]);
1870 st->compat = COMPAT_MODE_NETGROUP;
1873 st->name = strdup(&pw_name[1]);
1874 if (st->name == NULL) {
1876 "getpwent memory allocation failure");
1881 st->compat = COMPAT_MODE_NAME;
1883 if (entry.size > bufsize) {
1888 memcpy(buffer, entry.data, entry.size);
1889 rv = pwdb_versions[st->version].parse(buffer,
1890 entry.size, pwd, errnop);
1891 if (rv != NS_SUCCESS)
1893 else if (compat_set_template(pwd, &st->template) < 0) {
1900 switch (pw_name[1]) {
1902 /* XXX Maybe syslog warning */
1905 setnetgrent(&pw_name[2]);
1906 while (getnetgrent(&host, &user, &domain) !=
1908 if (user != NULL && user[0] != '\0')
1909 compat_exclude(user,
1915 compat_exclude(&pw_name[1], &st->exclude);
1922 if (compat_is_excluded((char *)entry.data, st->exclude))
1924 rv = pwdb_versions[st->version].match(entry.data, entry.size,
1926 if (rv == NS_RETURN)
1928 else if (rv != NS_SUCCESS)
1930 if (entry.size > bufsize) {
1935 memcpy(buffer, entry.data, entry.size);
1936 rv = pwdb_versions[st->version].parse(buffer, entry.size, pwd,
1938 if (rv & NS_TERMINATE)
1942 if (!stayopen && st->db != NULL) {
1943 st->db->close(st->db);
1946 if (rv == NS_SUCCESS) {
1948 pwd->pw_fields &= ~_PWF_SOURCE;
1949 pwd->pw_fields |= _PWF_FILES;
1952 *(struct passwd **)retval = pwd;
1959 * common passwd line matching and parsing
1962 __pw_match_entry(const char *entry, size_t entrysize, enum nss_lookup_type how,
1963 const char *name, uid_t uid)
1965 const char *p, *eom;
1970 eom = entry + entrysize;
1971 for (p = entry; p < eom; p++)
1975 return (NS_NOTFOUND);
1976 if (how == nss_lt_all)
1977 return (NS_SUCCESS);
1978 if (how == nss_lt_name) {
1980 if (len == (p - entry) && memcmp(name, entry, len) == 0)
1981 return (NS_SUCCESS);
1983 return (NS_NOTFOUND);
1985 for (p++; p < eom; p++)
1989 return (NS_NOTFOUND);
1990 m = strtoul(++p, &q, 10);
1991 if (q[0] != ':' || (uid_t)m != uid)
1992 return (NS_NOTFOUND);
1994 return (NS_SUCCESS);
1998 /* XXX buffer must be NUL-terminated. errnop is not set correctly. */
2000 __pw_parse_entry(char *buffer, size_t bufsize __unused, struct passwd *pwd,
2001 int master, int *errnop __unused)
2004 if (__pw_scan(buffer, pwd, master ? _PWSCAN_MASTER : 0) == 0)
2005 return (NS_NOTFOUND);
2007 return (NS_SUCCESS);