2007-10-07 19:44:02 +08:00
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/*
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2021-12-05 23:35:27 +08:00
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* SPDX-FileCopyrightText: 1989 - 1994, Julianne Frances Haugh
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* SPDX-FileCopyrightText: 1996 - 1998, Marek Michałkiewicz
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* SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
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* SPDX-FileCopyrightText: 2008 , Nicolas François
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2007-10-07 19:44:02 +08:00
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*
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2021-12-05 23:35:27 +08:00
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* SPDX-License-Identifier: BSD-3-Clause
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2007-10-07 19:44:02 +08:00
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*/
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#include <config.h>
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2007-11-11 07:46:11 +08:00
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#ident "$Id$"
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2007-10-07 19:47:01 +08:00
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2007-10-07 19:44:02 +08:00
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#include <sys/types.h>
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#include "defines.h"
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#include <stdio.h>
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#include <pwd.h>
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* libmisc/console.c, libmisc/ulimit.c, lib/sgetgrent.c,
lib/sgetpwent.c: Include "prototypes.h" to make
sure the exported prototypes are the ones used for the definition
of functions.
* lib/prototypes.h: Added prototypes for __gr_del_entry(),
__gr_get_db(), __gr_get_head(), __gr_set_changed(), __gr_dup(),
__pw_del_entry(), __pw_get_db(), __pw_get_head(), __pw_dup(),
sgetgrent(), sgetpwent(), __sgr_del_entry(), __sgr_dup(),
__sgr_get_head(), __sgr_set_changed(), __spw_get_head(),
__spw_del_entry(), __spw_dup().
* lib/prototypes.h: Removed prototype for is_listed().
* lib/prototypes.h: Added name of the check_su_auth()'s parameters.
* lib/groupio.h: Removed prototypes for __gr_dup() and
__gr_set_changed().
* lib/sgroupio.c: Removed prototypes for putsgent(), sgetsgent(),
and __gr_get_db().
* lib/sgroupio.h: Removed prototypes for __sgr_dup() and
__sgr_set_changed().
* lib/shadowio.c: Removed prototype for __pw_get_db().
* lib/pwio.c: Removed prototype for sgetpwent() and putpwent().
* lib/shadowio.h: Removed prototypes for __spw_dup() and
__spw_set_changed().
* lib/pwio.h: Removed prototypes for __pw_dup() and
__pw_set_changed().
* lib/commonio.h: Add protection against multiple inclusions.
* lib/prototypes.h: Include commonio.h (needed for the
__xx_del_entry() functions).
2008-01-06 19:59:01 +08:00
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#include "prototypes.h"
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2022-10-07 18:36:59 +08:00
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#include "shadowlog_internal.h"
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* libmisc/console.c, libmisc/ulimit.c, lib/sgetgrent.c,
lib/sgetpwent.c: Include "prototypes.h" to make
sure the exported prototypes are the ones used for the definition
of functions.
* lib/prototypes.h: Added prototypes for __gr_del_entry(),
__gr_get_db(), __gr_get_head(), __gr_set_changed(), __gr_dup(),
__pw_del_entry(), __pw_get_db(), __pw_get_head(), __pw_dup(),
sgetgrent(), sgetpwent(), __sgr_del_entry(), __sgr_dup(),
__sgr_get_head(), __sgr_set_changed(), __spw_get_head(),
__spw_del_entry(), __spw_dup().
* lib/prototypes.h: Removed prototype for is_listed().
* lib/prototypes.h: Added name of the check_su_auth()'s parameters.
* lib/groupio.h: Removed prototypes for __gr_dup() and
__gr_set_changed().
* lib/sgroupio.c: Removed prototypes for putsgent(), sgetsgent(),
and __gr_get_db().
* lib/sgroupio.h: Removed prototypes for __sgr_dup() and
__sgr_set_changed().
* lib/shadowio.c: Removed prototype for __pw_get_db().
* lib/pwio.c: Removed prototype for sgetpwent() and putpwent().
* lib/shadowio.h: Removed prototypes for __spw_dup() and
__spw_set_changed().
* lib/pwio.h: Removed prototypes for __pw_dup() and
__pw_set_changed().
* lib/commonio.h: Add protection against multiple inclusions.
* lib/prototypes.h: Include commonio.h (needed for the
__xx_del_entry() functions).
2008-01-06 19:59:01 +08:00
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2007-10-07 19:44:02 +08:00
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#define NFIELDS 7
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* libmisc/console.c, libmisc/ulimit.c, lib/sgetgrent.c,
lib/sgetpwent.c: Include "prototypes.h" to make
sure the exported prototypes are the ones used for the definition
of functions.
* lib/prototypes.h: Added prototypes for __gr_del_entry(),
__gr_get_db(), __gr_get_head(), __gr_set_changed(), __gr_dup(),
__pw_del_entry(), __pw_get_db(), __pw_get_head(), __pw_dup(),
sgetgrent(), sgetpwent(), __sgr_del_entry(), __sgr_dup(),
__sgr_get_head(), __sgr_set_changed(), __spw_get_head(),
__spw_del_entry(), __spw_dup().
* lib/prototypes.h: Removed prototype for is_listed().
* lib/prototypes.h: Added name of the check_su_auth()'s parameters.
* lib/groupio.h: Removed prototypes for __gr_dup() and
__gr_set_changed().
* lib/sgroupio.c: Removed prototypes for putsgent(), sgetsgent(),
and __gr_get_db().
* lib/sgroupio.h: Removed prototypes for __sgr_dup() and
__sgr_set_changed().
* lib/shadowio.c: Removed prototype for __pw_get_db().
* lib/pwio.c: Removed prototype for sgetpwent() and putpwent().
* lib/shadowio.h: Removed prototypes for __spw_dup() and
__spw_set_changed().
* lib/pwio.h: Removed prototypes for __pw_dup() and
__pw_set_changed().
* lib/commonio.h: Add protection against multiple inclusions.
* lib/prototypes.h: Include commonio.h (needed for the
__xx_del_entry() functions).
2008-01-06 19:59:01 +08:00
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2007-10-07 19:44:02 +08:00
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/*
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* sgetpwent - convert a string to a (struct passwd)
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*
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* sgetpwent() parses a string into the parts required for a password
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* structure. Strict checking is made for the UID and GID fields and
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* presence of the correct number of colons. Any failing tests result
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* in a NULL pointer being returned.
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*
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* NOTE: This function uses hard-coded string scanning functions for
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* performance reasons. I am going to come up with some conditional
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* compilation glarp to improve on this in the future.
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*/
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2007-10-07 19:46:07 +08:00
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struct passwd *sgetpwent (const char *buf)
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2007-10-07 19:44:02 +08:00
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{
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static struct passwd pwent;
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2022-10-07 18:36:59 +08:00
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static char pwdbuf[PASSWD_ENTRY_MAX_LENGTH];
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2022-08-05 23:40:29 +08:00
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int i;
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char *cp;
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2007-10-07 19:44:02 +08:00
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char *fields[NFIELDS];
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/*
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* Copy the string to a static buffer so the pointers into
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* the password structure remain valid.
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*/
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2022-10-07 18:36:59 +08:00
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if (strlen (buf) >= sizeof pwdbuf) {
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fprintf (shadow_logfd,
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"%s: Too long passwd entry encountered, file corruption?\n",
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shadow_progname);
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2007-10-07 19:46:07 +08:00
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return 0; /* fail if too long */
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2022-10-07 18:36:59 +08:00
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}
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2007-10-07 19:46:07 +08:00
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strcpy (pwdbuf, buf);
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2007-10-07 19:44:02 +08:00
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/*
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* Save a pointer to the start of each colon separated
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* field. The fields are converted into NUL terminated strings.
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*/
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2008-05-26 17:15:02 +08:00
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for (cp = pwdbuf, i = 0; (i < NFIELDS) && (NULL != cp); i++) {
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2007-10-07 19:44:02 +08:00
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fields[i] = cp;
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2008-05-26 17:15:02 +08:00
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while (('\0' != *cp) && (':' != *cp)) {
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cp++;
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}
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2007-10-07 19:46:07 +08:00
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2008-05-26 17:15:02 +08:00
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if ('\0' != *cp) {
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*cp = '\0';
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cp++;
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} else {
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cp = NULL;
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}
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2007-10-07 19:44:02 +08:00
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}
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2019-08-22 03:47:11 +08:00
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/* something at the end, columns over shot */
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2021-08-19 02:06:02 +08:00
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if ( cp != NULL ) {
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2019-08-22 03:47:11 +08:00
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return( NULL );
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}
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2007-10-07 19:44:02 +08:00
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/*
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* There must be exactly NFIELDS colon separated fields or
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* the entry is invalid. Also, the UID and GID must be non-blank.
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*/
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if (i != NFIELDS || *fields[2] == '\0' || *fields[3] == '\0')
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2008-05-26 17:15:02 +08:00
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return NULL;
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2007-10-07 19:44:02 +08:00
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/*
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* Each of the fields is converted the appropriate data type
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* and the result assigned to the password structure. If the
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* UID or GID does not convert to an integer value, a NULL
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* pointer is returned.
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*/
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pwent.pw_name = fields[0];
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pwent.pw_passwd = fields[1];
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2009-03-22 04:29:58 +08:00
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if (get_uid (fields[2], &pwent.pw_uid) == 0) {
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2008-05-26 17:15:02 +08:00
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return NULL;
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2007-10-07 19:44:02 +08:00
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}
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2009-03-22 04:29:58 +08:00
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if (get_gid (fields[3], &pwent.pw_gid) == 0) {
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2008-05-26 17:15:02 +08:00
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return NULL;
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2007-10-07 19:44:02 +08:00
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}
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pwent.pw_gecos = fields[4];
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pwent.pw_dir = fields[5];
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pwent.pw_shell = fields[6];
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return &pwent;
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}
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2008-05-26 17:15:02 +08:00
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