/* Copyright (C) 1997-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <pwd.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
#include <rpcsvc/nis.h>
#include "nisplus-parser.h"
#define NISENTRYVAL(idx, col, res) \
(NIS_RES_OBJECT (res)[idx].EN_data.en_cols.en_cols_val[col].ec_value.ec_value_val)
#define NISENTRYLEN(idx, col, res) \
(NIS_RES_OBJECT (res)[idx].EN_data.en_cols.en_cols_val[col].ec_value.ec_value_len)
#define NISOBJVAL(col, obj) \
((obj)->EN_data.en_cols.en_cols_val[col].ec_value.ec_value_val)
#define NISOBJLEN(col, obj) \
((obj)->EN_data.en_cols.en_cols_val[col].ec_value.ec_value_len)
int
_nss_nisplus_parse_pwent (nis_result *result, struct passwd *pw,
char *buffer, size_t buflen, int *errnop)
{
if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS)
|| NIS_RES_NUMOBJ (result) != 1
|| __type_of (NIS_RES_OBJECT (result)) != NIS_ENTRY_OBJ
|| strcmp (NIS_RES_OBJECT (result)->EN_data.en_type, "passwd_tbl") != 0
|| NIS_RES_OBJECT (result)->EN_data.en_cols.en_cols_len < 7)
return 0;
nis_object *obj = NIS_RES_OBJECT (result);
char *first_unused = buffer;
size_t room_left = buflen;
size_t len;
if (NISOBJLEN (0, obj) >= room_left)
{
/* The line is too long for our buffer. */
no_more_room:
*errnop = ERANGE;
return -1;
}
strncpy (first_unused, NISOBJVAL (0, obj), NISOBJLEN (0, obj));
first_unused[NISOBJLEN (0, obj)] = '\0';
len = strlen (first_unused);
if (len == 0) /* No name ? Should never happen, database is corrupt */
return 0;
pw->pw_name = first_unused;
room_left -= len + 1;
first_unused += len + 1;
if (NISOBJLEN (1, obj) >= room_left)
goto no_more_room;
strncpy (first_unused, NISOBJVAL (1, obj), NISOBJLEN (1, obj));
first_unused[NISOBJLEN (1, obj)] = '\0';
pw->pw_passwd = first_unused;
len = strlen (first_unused);
room_left -= len + 1;
first_unused += len + 1;
char *numstr = NISOBJVAL (2, obj);
len = NISOBJLEN (2, obj);
if (len == 0 || numstr[len - 1] != '\0')
{
if (len >= room_left)
goto no_more_room;
strncpy (first_unused, numstr, len);
first_unused[len] = '\0';
numstr = first_unused;
}
if (numstr[0] == '\0')
/* If we don't have a uid, it's an invalid shadow entry. */
return 0;
pw->pw_uid = strtoul (numstr, NULL, 10);
numstr = NISOBJVAL (3, obj);
len = NISOBJLEN (3, obj);
if (len == 0 || numstr[len - 1] != '\0')
{
if (len >= room_left)
goto no_more_room;
strncpy (first_unused, numstr, len);
first_unused[len] = '\0';
numstr = first_unused;
}
if (numstr[0] == '\0')
/* If we don't have a gid, it's an invalid shadow entry. */
return 0;
pw->pw_gid = strtoul (numstr, NULL, 10);
if (NISOBJLEN(4, obj) >= room_left)
goto no_more_room;
strncpy (first_unused, NISOBJVAL (4, obj), NISOBJLEN (4, obj));
first_unused[NISOBJLEN (4, obj)] = '\0';
pw->pw_gecos = first_unused;
len = strlen (first_unused);
room_left -= len + 1;
first_unused += len + 1;
if (NISOBJLEN (5, obj) >= room_left)
goto no_more_room;
strncpy (first_unused, NISOBJVAL (5, obj), NISOBJLEN (5, obj));
first_unused[NISOBJLEN (5, obj)] = '\0';
pw->pw_dir = first_unused;
len = strlen (first_unused);
room_left -= len + 1;
first_unused += len + 1;
if (NISOBJLEN (6, obj) >= room_left)
goto no_more_room;
strncpy (first_unused, NISOBJVAL (6, obj), NISOBJLEN (6, obj));
first_unused[NISOBJLEN (6, obj)] = '\0';
pw->pw_shell = first_unused;
len = strlen (first_unused);
room_left -= len + 1;
first_unused += len + 1;
return 1;
}
int
_nss_nisplus_parse_grent (nis_result *result, struct group *gr,
char *buffer, size_t buflen, int *errnop)
{
if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS)
|| __type_of(NIS_RES_OBJECT (result)) != NIS_ENTRY_OBJ
|| strcmp (NIS_RES_OBJECT (result)[0].EN_data.en_type, "group_tbl") != 0
|| NIS_RES_OBJECT (result)[0].EN_data.en_cols.en_cols_len < 4)
return 0;
nis_object *obj = NIS_RES_OBJECT (result);
char *first_unused = buffer;
size_t room_left = buflen;
char *line;
int count;
size_t len;
if (NISOBJLEN (0, obj) >= room_left)
{
/* The line is too long for our buffer. */
no_more_room:
*errnop = ERANGE;
return -1;
}
strncpy (first_unused, NISOBJVAL (0, obj), NISOBJLEN (0, obj));
first_unused[NISOBJLEN (0, obj)] = '\0';
len = strlen (first_unused);
if (len == 0) /* group table is corrupt */
return 0;
gr->gr_name = first_unused;
room_left -= len + 1;
first_unused += len + 1;
if (NISOBJLEN (1, obj) >= room_left)
goto no_more_room;
strncpy (first_unused, NISOBJVAL (1, obj), NISOBJLEN (1, obj));
first_unused[NISOBJLEN (1, obj)] = '\0';
gr->gr_passwd = first_unused;
len = strlen (first_unused);
room_left -= len + 1;
first_unused += len + 1;
char *numstr = NISOBJVAL (2, obj);
len = NISOBJLEN (2, obj);
if (len == 0 || numstr[len - 1] != '\0')
{
if (len >= room_left)
goto no_more_room;
strncpy (first_unused, numstr, len);
first_unused[len] = '\0';
numstr = first_unused;
}
if (numstr[0] == '\0')
/* We should always have a gid. */
return 0;
gr->gr_gid = strtoul (numstr, NULL, 10);
if (NISOBJLEN (3, obj) >= room_left)
goto no_more_room;
strncpy (first_unused, NISOBJVAL (3, obj), NISOBJLEN (3, obj));
first_unused[NISOBJLEN (3, obj)] = '\0';
line = first_unused;
len = strlen (line);
room_left -= len + 1;
first_unused += len + 1;
/* Adjust the pointer so it is aligned for
storing pointers. */
size_t adjust = ((__alignof__ (char *)
- (first_unused - (char *) 0) % __alignof__ (char *))
% __alignof__ (char *));
if (room_left < adjust)
goto no_more_room;
first_unused += adjust;
room_left -= adjust;
gr->gr_mem = (char **) first_unused;
count = 0;
while (*line != '\0')
{
/* Skip leading blanks. */
while (isspace (*line))
++line;
if (*line == '\0')
break;
if (room_left < sizeof (char *))
goto no_more_room;
room_left -= sizeof (char *);
gr->gr_mem[count++] = line;
while (*line != '\0' && *line != ',' && !isspace (*line))
++line;
if (*line == ',' || isspace (*line))
{
int is = isspace (*line);
*line++ = '\0';
if (is)
while (*line != '\0' && (*line == ',' || isspace (*line)))
++line;
}
}
if (room_left < sizeof (char *))
goto no_more_room;
room_left -= sizeof (char *);
gr->gr_mem[count] = NULL;
return 1;
}
int
_nss_nisplus_parse_spent (nis_result *result, struct spwd *sp,
char *buffer, size_t buflen, int *errnop)
{
char *first_unused = buffer;
size_t room_left = buflen;
size_t len;
if (result == NULL)
return 0;
if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS)
|| NIS_RES_NUMOBJ (result) != 1
|| __type_of(NIS_RES_OBJECT (result)) != NIS_ENTRY_OBJ
|| strcmp (NIS_RES_OBJECT (result)->EN_data.en_type, "passwd_tbl") != 0
|| NIS_RES_OBJECT (result)->EN_data.en_cols.en_cols_len < 8)
return 0;
if (NISENTRYLEN (0, 0, result) >= room_left)
{
/* The line is too long for our buffer. */
no_more_room:
*errnop = ERANGE;
return -1;
}
strncpy (first_unused, NISENTRYVAL (0, 0, result),
NISENTRYLEN (0, 0, result));
first_unused[NISENTRYLEN (0, 0, result)] = '\0';
len = strlen (first_unused);
if (len == 0)
return 0;
sp->sp_namp = first_unused;
room_left -= len + 1;
first_unused += len + 1;
if (NISENTRYLEN (0, 1, result) >= room_left)
goto no_more_room;
strncpy (first_unused, NISENTRYVAL (0, 1, result),
NISENTRYLEN (0, 1, result));
first_unused[NISENTRYLEN (0, 1, result)] = '\0';
sp->sp_pwdp = first_unused;
len = strlen (first_unused);
room_left -= len + 1;
first_unused += len + 1;
sp->sp_lstchg = sp->sp_min = sp->sp_max = sp->sp_warn = sp->sp_inact =
sp->sp_expire = -1;
sp->sp_flag = ~0ul;
if (NISENTRYLEN (0, 7, result) > 0)
{
char *line = NISENTRYVAL (0, 7, result);
char *cp = strchr (line, ':');
if (cp == NULL)
return 1;
*cp++ = '\0';
if (*line)
sp->sp_lstchg = atol (line);
line = cp;
cp = strchr (line, ':');
if (cp == NULL)
return 1;
*cp++ = '\0';
if (*line)
sp->sp_min = atol (line);
line = cp;
cp = strchr (line, ':');
if (cp == NULL)
return 1;
*cp++ = '\0';
if (*line)
sp->sp_max = atol (line);
line = cp;
cp = strchr (line, ':');
if (cp == NULL)
return 1;
*cp++ = '\0';
if (*line)
sp->sp_warn = atol (line);
line = cp;
cp = strchr (line, ':');
if (cp == NULL)
return 1;
*cp++ = '\0';
if (*line)
sp->sp_inact = atol (line);
line = cp;
cp = strchr (line, ':');
if (cp == NULL)
return 1;
*cp++ = '\0';
if (*line)
sp->sp_expire = atol (line);
line = cp;
if (line == NULL)
return 1;
if (*line)
sp->sp_flag = atol (line);
}
return 1;
}