/*
netgroup.c - netgroup lookup routines
Parts of this file were part of the nss_ldap library (as ldap-netgrp.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 <stdarg.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/param.h>
#include <string.h>
#include "common.h"
#include "log.h"
#include "myldap.h"
#include "cfg.h"
#include "attmap.h"
/* ( nisSchema.2.8 NAME 'nisNetgroup' SUP top STRUCTURAL
* DESC 'Abstraction of a netgroup. May refer to other netgroups'
* MUST cn
* MAY ( nisNetgroupTriple $ memberNisNetgroup $ description ) )
*/
/* the search base for searches */
const char *netgroup_bases[NSS_LDAP_CONFIG_MAX_BASES] = { NULL };
/* the search scope for searches */
int netgroup_scope = LDAP_SCOPE_DEFAULT;
/* the basic search filter for searches */
const char *netgroup_filter = "(objectClass=nisNetgroup)";
/* the attributes to request with searches */
const char *attmap_netgroup_cn = "cn";
const char *attmap_netgroup_nisNetgroupTriple = "nisNetgroupTriple";
const char *attmap_netgroup_memberNisNetgroup = "memberNisNetgroup";
/* the attribute list to request with searches */
static const char *netgroup_attrs[4];
static int mkfilter_netgroup_byname(const char *name,
char *buffer, size_t buflen)
{
char safename[BUFLEN_SAFENAME];
/* escape attribute */
if (myldap_escape(name, safename, sizeof(safename)))
{
log_log(LOG_ERR, "mkfilter_netgroup_byname(): safename buffer too small");
return -1;
}
/* build filter */
return mysnprintf(buffer, buflen, "(&%s(%s=%s))",
netgroup_filter, attmap_netgroup_cn, safename);
}
void netgroup_init(void)
{
int i;
/* set up search bases */
if (netgroup_bases[0] == NULL)
for (i = 0; i < NSS_LDAP_CONFIG_MAX_BASES; i++)
netgroup_bases[i] = nslcd_cfg->bases[i];
/* set up scope */
if (netgroup_scope == LDAP_SCOPE_DEFAULT)
netgroup_scope = nslcd_cfg->scope;
/* set up attribute list */
netgroup_attrs[0] = attmap_netgroup_cn;
netgroup_attrs[1] = attmap_netgroup_nisNetgroupTriple;
netgroup_attrs[2] = attmap_netgroup_memberNisNetgroup;
netgroup_attrs[3] = NULL;
}
static int write_string_stripspace_len(TFILE *fp, const char *str, int len)
{
int32_t tmpint32;
int i, j;
DEBUG_PRINT("WRITE_STRING: var=" __STRING(str) " string=\"%s\"", str);
/* skip leading spaces */
for (i = 0; (str[i] != '\0') && (isspace(str[i])); i++)
/* nothing */ ;
/* skip trailing spaces */
for (j = len; (j > i) && (isspace(str[j - 1])); j--)
/* nothing */ ;
/* write length of string */
WRITE_INT32(fp, j - i);
/* write string itself */
if (j > i)
{
WRITE(fp, str + i, j - i);
}
/* we're done */
return 0;
}
#define WRITE_STRING_STRIPSPACE_LEN(fp, str, len) \
if (write_string_stripspace_len(fp, str, len)) \
return -1;
#define WRITE_STRING_STRIPSPACE(fp, str) \
WRITE_STRING_STRIPSPACE_LEN(fp, str, strlen(str))
static int write_netgroup_triple(TFILE *fp, MYLDAP_ENTRY *entry,
const char *triple)
{
int32_t tmpint32;
int i;
int hostb, hoste, userb, usere, domainb, domaine;
/* skip leading spaces */
for (i = 0; (triple[i] != '\0') && (isspace(triple[i])); i++)
/* nothing */ ;
/* we should have a bracket now */
if (triple[i] != '(')
{
log_log(LOG_WARNING, "%s: %s: does not begin with '('",
myldap_get_dn(entry), attmap_netgroup_nisNetgroupTriple);
return 0;
}
i++;
hostb = i;
/* find comma (end of host string) */
for (; (triple[i] != '\0') && (triple[i] != ','); i++)
/* nothing */ ;
hoste = i;
if (triple[i++] != ',')
{
log_log(LOG_WARNING, "%s: %s: missing ','",
myldap_get_dn(entry), attmap_netgroup_nisNetgroupTriple);
return 0;
}
userb = i;
/* find comma (end of user string) */
for (; (triple[i] != '\0') && (triple[i] != ','); i++)
/* nothing */ ;
usere = i;
if (triple[i++] != ',')
{
log_log(LOG_WARNING, "%s: %s: missing ','",
myldap_get_dn(entry), attmap_netgroup_nisNetgroupTriple);
return 0;
}
domainb = i;
/* find closing bracket (end of domain string) */
for (; (triple[i] != '\0') && (triple[i] != ')'); i++)
/* nothing */ ;
domaine=i;
if (triple[i++] != ')')
{
log_log(LOG_WARNING, "%s: %s: missing ')'",
myldap_get_dn(entry), attmap_netgroup_nisNetgroupTriple);
return 0;
}
/* skip trailing spaces */
for (; (triple[i] != '\0') && (isspace(triple[i])); i++)
/* nothing */ ;
/* if anything is left in the string we have a problem */
if (triple[i] != '\0')
{
log_log(LOG_WARNING, "%s: %s: contains trailing data",
myldap_get_dn(entry), attmap_netgroup_nisNetgroupTriple);
return 0;
}
/* write strings */
WRITE_INT32(fp, NSLCD_NETGROUP_TYPE_TRIPLE);
WRITE_STRING_STRIPSPACE_LEN(fp, triple + hostb, hoste - hostb)
WRITE_STRING_STRIPSPACE_LEN(fp, triple + userb, usere - userb)
WRITE_STRING_STRIPSPACE_LEN(fp, triple + domainb, domaine - domainb)
/* we're done */
return 0;
}
static int write_netgroup(TFILE *fp, MYLDAP_ENTRY *entry, const char *reqname)
{
int32_t tmpint32;
int i, j;
const char **names;
const char **triples;
const char **members;
/* get the netgroup name */
names = myldap_get_values(entry, attmap_netgroup_cn);
if ((names == NULL) || (names[0] == NULL))
{
log_log(LOG_WARNING, "%s: %s: missing",
myldap_get_dn(entry), attmap_netgroup_cn);
return 0;
}
/* get the netgroup triples and member */
triples = myldap_get_values(entry, attmap_netgroup_nisNetgroupTriple);
members = myldap_get_values(entry, attmap_netgroup_memberNisNetgroup);
/* write the entries */
for (i = 0; names[i] != NULL; i++)
if ((reqname == NULL) || (STR_CMP(reqname, names[i]) == 0))
{
/* write first part of result */
WRITE_INT32(fp, NSLCD_RESULT_BEGIN);
WRITE_STRING(fp, names[i]);
/* write the netgroup triples */
if (triples != NULL)
for (j = 0; triples[j] != NULL; j++)
if (write_netgroup_triple(fp, entry, triples[j]))
return -1;
/* write netgroup members */
if (members != NULL)
for (j = 0; members[j] != NULL; j++)
{
/* write triple indicator */
WRITE_INT32(fp, NSLCD_NETGROUP_TYPE_NETGROUP);
/* write netgroup name */
WRITE_STRING_STRIPSPACE(fp, members[j]);
}
/* write end of result marker */
WRITE_INT32(fp, NSLCD_NETGROUP_TYPE_END);
}
/* we're done */
return 0;
}
NSLCD_HANDLE(
netgroup, byname, NSLCD_ACTION_NETGROUP_BYNAME,
char name[BUFLEN_NAME];
char filter[BUFLEN_FILTER];
READ_STRING(fp, name);
log_setrequest("netgroup=\"%s\"", name);,
mkfilter_netgroup_byname(name, filter, sizeof(filter)),
write_netgroup(fp, entry, name)
)
NSLCD_HANDLE(
netgroup, all, NSLCD_ACTION_NETGROUP_ALL,
const char *filter;
log_setrequest("netgroup(all)");,
(filter = netgroup_filter, 0),
write_netgroup(fp, entry, NULL)
)