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/*
shadow.c - shadow entry lookup routines
Parts of this file were part of the nss_ldap library (as ldap-spwd.c)
which has been forked into the nss-pam-ldapd library.
Copyright (C) 1997-2005 Luke Howard
Copyright (C) 2006 West Consulting
Copyright (C) 2006-2014 Arthur de Jong
This 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.
This 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 this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "common.h"
#include "log.h"
#include "myldap.h"
#include "cfg.h"
#include "attmap.h"
static long to_date(const char *dn, const char *date, const char *attr)
{
char buffer[32];
long value;
char *tmp;
size_t l;
/* do some special handling for date values on AD */
if (strcasecmp(attr, "pwdLastSet") == 0)
{
/* we expect an AD 64-bit datetime value;
we should do date=date/864000000000-134774
but that causes problems on 32-bit platforms,
first we devide by 1000000000 by stripping the
last 9 digits from the string and going from there */
l = strlen(date) - 9;
if (l > (sizeof(buffer) - 1))
return -1; /* error */
strncpy(buffer, date, l);
buffer[l] = '\0';
errno = 0;
value = strtol(buffer, &tmp, 10);
if ((*date == '\0') || (*tmp != '\0'))
{
log_log(LOG_WARNING, "%s: %s: non-numeric", dn, attr);
return -1;
}
else if (errno != 0)
{
log_log(LOG_WARNING, "%s: %s: out of range", dn, attr);
return -1;
}
return value / 864 - 134774;
/* note that AD does not have expiry dates but a lastchangeddate
and some value that needs to be added */
}
errno = 0;
value = strtol(date, &tmp, 10);
if ((*date == '\0') || (*tmp != '\0'))
{
log_log(LOG_WARNING, "%s: %s: non-numeric", dn, attr);
return -1;
}
else if (errno != 0)
{
log_log(LOG_WARNING, "%s: %s: out of range", dn, attr);
return -1;
}
return value;
}
#ifndef UF_DONT_EXPIRE_PASSWD
#define UF_DONT_EXPIRE_PASSWD 0x10000
#endif
#define GET_OPTIONAL_LONG(var, att, fallback) \
tmpvalue = attmap_get_value(entry, attmap_shadow_##att, \
buffer, sizeof(buffer)); \
if (tmpvalue == NULL) \
tmpvalue = ""; \
errno = 0; \
var = strtol(tmpvalue, &tmp, 10); \
if ((*(tmpvalue) == '\0') || (*tmp != '\0')) \
{ \
log_log(LOG_WARNING, "%s: %s: non-numeric", \
myldap_get_dn(entry), attmap_shadow_##att); \
var = fallback; \
} \
else if (errno != 0) \
{ \
log_log(LOG_WARNING, "%s: %s: out of range", \
myldap_get_dn(entry), attmap_shadow_##att); \
var = fallback; \
}
void get_shadow_properties(MYLDAP_ENTRY *entry, long *lastchangedate,
long *mindays, long *maxdays, long *warndays,
long *inactdays, long *expiredate,
unsigned long *flag)
{
char buffer[64];
const char *tmpvalue;
char *tmp;
/* get lastchange date */
tmpvalue = attmap_get_value(entry, attmap_shadow_shadowLastChange,
buffer, sizeof(buffer));
if (tmpvalue == NULL)
tmpvalue = "";
*lastchangedate = to_date(myldap_get_dn(entry), tmpvalue, attmap_shadow_shadowLastChange);
/* get other shadow properties */
GET_OPTIONAL_LONG(*mindays, shadowMin, -1);
GET_OPTIONAL_LONG(*maxdays, shadowMax, -1);
GET_OPTIONAL_LONG(*warndays, shadowWarning, -1);
GET_OPTIONAL_LONG(*inactdays, shadowInactive, -1);
GET_OPTIONAL_LONG(*expiredate, shadowExpire, -1);
GET_OPTIONAL_LONG(*flag, shadowFlag, 0);
/* if we're using AD handle the flag specially */
if (strcasecmp(attmap_shadow_shadowLastChange, "pwdLastSet") == 0)
{
if (*flag & UF_DONT_EXPIRE_PASSWD)
*maxdays = -1;
*flag = 0;
}
}
static int write_shadow(TFILE *fp, MYLDAP_ENTRY *entry, const char *requser,
uid_t calleruid)
{
int32_t tmpint32;
const char **usernames;
const char *passwd;
long lastchangedate;
long mindays;
long maxdays;
long warndays;
long inactdays;
long expiredate;
unsigned long flag;
int i;
char passbuffer[BUFLEN_PASSWORDHASH];
/* get username */
usernames = myldap_get_values(entry, attmap_shadow_uid);
if ((usernames == NULL) || (usernames[0] == NULL))
{
log_log(LOG_WARNING, "%s: %s: missing",
myldap_get_dn(entry), attmap_shadow_uid);
return 0;
}
/* get password */
passwd = get_userpassword(entry, attmap_shadow_userPassword,
passbuffer, sizeof(passbuffer));
if ((passwd == NULL) || (calleruid != 0))
passwd = default_shadow_userPassword;
/* get expiry properties */
get_shadow_properties(entry, &lastchangedate, &mindays, &maxdays, &warndays,
&inactdays, &expiredate, &flag);
/* write the entries */
for (i = 0; usernames[i] != NULL; i++)
if ((requser == NULL) || (STR_CMP(requser, usernames[i]) == 0))
{
WRITE_INT32(fp, NSLCD_RESULT_BEGIN);
WRITE_STRING(fp, usernames[i]);
WRITE_STRING(fp, passwd);
WRITE_INT32(fp, lastchangedate);
WRITE_INT32(fp, mindays);
WRITE_INT32(fp, maxdays);
WRITE_INT32(fp, warndays);
WRITE_INT32(fp, inactdays);
WRITE_INT32(fp, expiredate);
WRITE_INT32(fp, flag);
}
return 0;
}
MYLDAP_ENTRY *shadow_uid2entry(MYLDAP_SESSION *session, const char *username,
int *rcp)
{
MYLDAP_SEARCH *search = NULL;
MYLDAP_ENTRY *entry = NULL;
const char *base;
char filter[BUFLEN_FILTER];
int i;
/* if it isn't a valid username, just bail out now */
if (!isvalidname(username))
{
if (rcp != NULL)
*rcp = LDAP_INVALID_SYNTAX;
return NULL;
}
/* we have to look up the entry */
mkfilter_shadow_byname(username, filter, sizeof(filter));
for (i = 0; (i < NSS_LDAP_CONFIG_MAX_BASES) && ((base = shadow_bases[i]) != NULL); i++)
{
search = myldap_search(session, base, shadow_scope, filter, shadow_attrs, rcp);
if (search == NULL)
{
if ((rcp != NULL) && (*rcp == LDAP_SUCCESS))
*rcp = LDAP_NO_SUCH_OBJECT;
return NULL;
}
entry = myldap_get_entry(search, rcp);
if (entry != NULL)
return entry;
}
if ((rcp != NULL) && (*rcp == LDAP_SUCCESS))
*rcp = LDAP_NO_SUCH_OBJECT;
return NULL;
}
NSLCD_HANDLE_UID(
shadow, byname, NSLCD_ACTION_SHADOW_BYNAME,
char name[BUFLEN_NAME];
char filter[BUFLEN_FILTER];
READ_STRING(fp, name);
log_setrequest("shadow=\"%s\"", name);,
mkfilter_shadow_byname(name, filter, sizeof(filter)),
write_shadow(fp, entry, name, calleruid)
)
NSLCD_HANDLE_UID(
shadow, all, NSLCD_ACTION_SHADOW_ALL,
const char *filter;
log_setrequest("shadow(all)");,
(filter = shadow_filter, 0),
write_shadow(fp, entry, NULL, calleruid)
)
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