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ldap-nss.c
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ldap-nss.c
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/* Copyright (C) 1997-2010 Luke Howard.
This file is part of the nss_ldap library.
Contributed by Luke Howard, <[email protected]>, 1997.
The nss_ldap library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The nss_ldap 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the nss_ldap library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
static char rcsId[] =
"$Id$";
#include "config.h"
#ifdef HAVE_PORT_BEFORE_H
#include <port_before.h>
#endif
#if defined(HAVE_THREAD_H) && !defined(_AIX)
#include <thread.h>
#elif defined(HAVE_PTHREAD_H)
#include <pthread.h>
#endif
#include <sys/param.h> /* for PATH_MAX */
#include <assert.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#include <stdio.h>
#include <syslog.h>
#include <signal.h>
#include <fcntl.h>
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/param.h>
#include <errno.h>
#ifdef HAVE_RESOLV_H
#include <resolv.h>
#endif
#ifdef HAVE_SYS_UN_H
#include <sys/un.h>
#endif
#include <netinet/in.h>
#ifdef HAVE_LBER_H
#include <lber.h>
#endif
#ifdef HAVE_LDAP_H
#include <ldap.h>
#endif
#ifdef HAVE_LDAP_SSL_H
#include <ldap_ssl.h>
#endif
#ifdef HAVE_GSSLDAP_H
#include <gssldap.h>
#endif
#ifdef HAVE_GSSSASL_H
#include <gsssasl.h>
#endif
/* Try to handle systems with both SASL libraries installed */
#if defined(HAVE_SASL_SASL_H) && defined(HAVE_SASL_AUXPROP_REQUEST)
#include <sasl/sasl.h>
#elif defined(HAVE_SASL_H)
#include <sasl.h>
#endif
#ifndef HAVE_SNPRINTF
#include "snprintf.h"
#endif
#include "ldap-nss.h"
#include "ltf.h"
#include "util.h"
#include "dnsconfig.h"
#include "pagectrl.h"
/* Prefer the threads library over the pthreads facility unless running on AIX */
#if defined(HAVE_THREAD_H) && !defined(_AIX)
#ifdef HAVE_PTHREAD_ATFORK
#undef HAVE_PTHREAD_ATFORK
#endif
#endif
/* how many messages to retrieve results for */
#ifndef LDAP_MSG_ONE
#define LDAP_MSG_ONE 0x00
#endif
#ifndef LDAP_MSG_ALL
#define LDAP_MSG_ALL 0x01
#endif
#ifndef LDAP_MSG_RECEIVED
#define LDAP_MSG_RECEIVED 0x02
#endif
#ifdef HAVE_LDAP_LD_FREE
#if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
extern int ldap_ld_free (LDAP * ld, int close, LDAPControl **,
LDAPControl **);
#else
extern int ldap_ld_free (LDAP * ld, int close);
#endif /* OPENLDAP 2.x */
#endif /* HAVE_LDAP_LD_FREE */
NSS_LDAP_DEFINE_LOCK (__lock);
/*
* the configuration is read by the first call to do_open().
* Pointers to elements of the list are passed around but should not
* be freed.
*/
static char __configbuf[NSS_LDAP_CONFIG_BUFSIZ];
#ifdef HAVE_SIGACTION
static struct sigaction __stored_handler;
static int __sigaction_retval = -1;
#else
static void (*__sigpipe_handler) (int) = SIG_DFL;
#endif /* HAVE_SIGACTION */
/*
* SASL mechs setup
*/
static ldap_session_mech_setup_t sasl_setups[] = {
__nss_ldap_krb5_cache
};
/*
* Global LDAP session.
*/
static ldap_session_t __session =
{
NULL, /* LDAP session connection */
NULL, /* LDAP session configuration data */
0, /* Timestamp of last activity */
LS_UNINITIALIZED, /* LDAP session current state */
0, /* Index of URI used for this connection */
-1, /* Initial PID information */
-1, /* Initial EUID information */
NULL, /* Head of Opaque pointer list for extensions */
NULL /* SASL mechanism entry points */
/* There are 2 large data areas at the end of the structure for socket addresses */
};
/* Track initial operation of the library when threading active */
#if defined(HAVE_PTHREAD_ATFORK) || defined(HAVE_LIBC_LOCK_H) || defined(HAVE_BITS_LIBC_LOCK_H)
static pthread_once_t __once = PTHREAD_ONCE_INIT;
#endif
#ifdef LBER_OPT_LOG_PRINT_FILE
static FILE *__debugfile;
#endif /* LBER_OPT_LOG_PRINT_FILE */
#ifdef HAVE_LDAPSSL_CLIENT_INIT
static int __ssl_initialized = 0;
#endif /* HAVE_LDAPSSL_CLIENT_INIT */
#if defined(HAVE_PTHREAD_ATFORK) || defined(HAVE_LIBC_LOCK_H) || defined(HAVE_BITS_LIBC_LOCK_H)
# if defined(HAVE_PTHREAD_ATFORK)
# define ATFORK_DO pthread_atfork
# else
# define ATFORK_DO __libc_atfork
# endif
/*
* Prepare for fork (); lock mutex.
*/
static void do_atfork_prepare (void);
/*
* Forked in parent, unlock mutex.
*/
static void do_atfork_parent (void);
/*
* Forked in child; close LDAP socket, unlock mutex.
*/
static void do_atfork_child (void);
/*
* Install handlers for atfork, called once.
*/
static void do_atfork_setup (void);
#endif
/*
* Close the global session, sending an unbind.
*/
static void do_close (ldap_session_t *session);
/*
* Close the global session without sending an unbind.
*/
static void do_close_no_unbind (ldap_session_t *session);
/*
* Disable keepalive on a LDAP connection's socket.
*/
static void do_set_sockopts (ldap_session_t *session);
/*
* TLS routines: set global SSL session options.
*/
#if defined(HAVE_LDAP_START_TLS_S) || defined(HAVE_LDAP_START_TLS) || (defined(HAVE_LDAP_SET_OPTION) && defined(LDAP_OPT_X_TLS))
static int do_ssl_options (ldap_config_t * cfg);
static int do_start_tls (ldap_session_t * session);
#endif
/*
* Read and validate configuration file.
* Check current connection state and drop if any of
* connection has been snaffled by other software
* have forked (thread forked or process forked)
* idle time has elapsed since last used
*/
static NSS_STATUS do_check_init (ldap_session_t *session);
/*
* Read configuration file and initialize schema
*/
static NSS_STATUS do_init (ldap_session_t *session);
/*
* Open the global session
*/
static NSS_STATUS do_open (ldap_session_t *session);
/*
* Perform an asynchronous search.
*/
static int do_search (ldap_session_t * session, const char *base, int scope,
const char *filter, const char **attrs,
int sizelimit, int *);
/*
* Perform a synchronous search.
*/
static int do_search_s (ldap_session_t * session, const char *base, int scope,
const char *filter, const char **attrs,
int sizelimit, LDAPMessage **);
/*
* Fetch an LDAP result.
*/
static NSS_STATUS do_result (ldap_session_t *session, ent_context_t * ctx, int all);
/*
* Format a filter given a prototype.
*/
static NSS_STATUS do_filter (const ldap_args_t * args, const char *filterprot,
ldap_service_search_descriptor_t * sd,
char *filter, size_t filterlen,
char **dynamicFilter, const char **retFilter);
/*
* Parse a result, fetching new results until a successful parse
* or exceptional condition.
*/
static NSS_STATUS do_parse (ldap_session_t *session, ent_context_t * ctx,
void *result, char *buffer,
size_t buflen, int *errnop, parser_t parser);
/*
* Parse a result, fetching results from the result chain
* rather than the server.
*/
static NSS_STATUS do_parse_s (ldap_session_t *session, ent_context_t * ctx,
void *result, char *buffer,
size_t buflen, int *errnop, parser_t parser);
/*
* Function to be braced by reconnect harness. Used so we
* can apply the reconnect code to both asynchronous and
* synchronous searches.
*/
typedef int (*search_func_t) (ldap_session_t *, const char *, int, const char *,
const char **, int, void *);
/*
* Do a search with a reconnect harness.
*/
static NSS_STATUS
do_with_reconnect (ldap_session_t *session, const char *base, int scope,
const char *filter, const char **attrs, int sizelimit,
void *private, search_func_t func);
/*
* Map error from LDAP status code to NSS status code
*/
static NSS_STATUS do_map_error (int rc);
/*
* support the sasl interaction
*/
static int do_sasl_interact (LDAP * ld, unsigned flags, void *defaults, void *p);
/*
* Do a sasl bind with a defined timeout
*/
static int do_sasl_bind (ldap_session_t *session, int timelimit, const char *dn, const char *pw);
/*
* Do a bind with a defined timeout
*/
static int do_bind (ldap_session_t *session, int timelimit, const char *dn, const char *pw,
int with_sasl);
static int
do_get_our_socket (ldap_session_t *session, int *sd);
static int
do_dupfd (int oldfd, int newfd);
static void
do_drop_connection (ldap_session_t *session, int sd, int closeSd);
static inline int
__local_option (void *outvalue)
{
return LDAP_OPT_SUCCESS;
}
/*
* Define MACROS to handle all of the LDAP options as in-line code
* rather than conditions all over the package
* - Howard Wilkinson October 2009
*/
#if defined(HAVE_LDAP_GET_OPTION) && defined(LDAP_OPT_DESC)
#define GET_SOCKET_DESCRIPTOR(__conn__, __sd__) \
(ldap_get_option ((__conn__), LDAP_OPT_DESC, (__sd__)))
#else
#define GET_SOCKET_DESCRIPTOR(__conn__, __sd__) \
(__local_option (*(__sd__) = (__conn__)->ld_sb.sb_sd))
#endif
#if defined(HAVE_LDAP_SET_OPTION) && defined(LDAP_OPT_DESC)
#define SET_SOCKET_DESCRIPTOR(__conn__, __sd__) \
(ldap_set_option ((__conn__), LDAP_OPT_DESC, (__sd__)))
#else
#define SET_SOCKET_DESCRIPTOR(__conn__, __sd__) \
(__local_option ((__conn__)->ld_sb.sb_sd = *(__sd__)))
#endif
#if defined(HAVE_LDAP_GET_OPTION) && defined(LDAP_OPT_PROTOCOL_VERSION)
#define GET_PROTOCOL_VERSION(__conn__, __version__) \
(ldap_get_option ((__conn__), LDAP_OPT_PROTOCOL_VERSION, (__version__)))
#else
#define GET_PROTOCOL_VERSION(__conn__, __version__) \
(__local_option (NULL))
#endif
#if defined(HAVE_LDAP_SET_OPTION) && defined(LDAP_OPT_PROTOCOL_VERSION)
#define SET_PROTOCOL_VERSION(__conn__, __version__) \
(ldap_set_option ((__conn__), LDAP_OPT_PROTOCOL_VERSION, (__version__)))
#else
#define SET_PROTOCOL_VERSION(__conn__, __version__) \
(__local_option (NULL))
#endif
#if defined(HAVE_LDAP_GET_OPTION) && defined(LDAP_OPT_ERROR_NUMBER)
#define GET_ERROR_NUMBER(__conn__, __errno__) \
(ldap_get_option ((__conn__), LDAP_OPT_ERROR_NUMBER, (__errno__)))
#else
#define GET_ERROR_NUMBER(__conn__, __errno__) \
(__local_option (*(__errno__) = (__conn__)->ld_errno))
#endif
#if defined(HAVE_LDAP_SET_OPTION) && defined(LDAP_OPT_ERROR_NUMBER)
#define SET_ERROR_NUMBER(__conn__, __errno__) \
(ldap_set_option ((__conn__), LDAP_OPT_ERROR_NUMBER, (__errno__)))
#else
#define SET_ERROR_NUMBER(__conn__, __errno__) \
(__local_option ((__conn__)->ld_errno = *(__errno__))
#endif
#if defined(HAVE_LDAP_GET_OPTION) && defined(LDAP_OPT_ERROR_STRING)
#define GET_ERROR_STRING(__conn__, __errstr__) \
(ldap_get_option ((__conn__), LDAP_OPT_ERROR_STRING, (__errstr__)))
#else
#define GET_ERROR_STRING(__conn__, __errstr__) \
(__local_option (*(__errstr__) = (__conn__)->ld_error))
#endif
#if defined(HAVE_LDAP_GET_OPTION) && defined(LDAP_OPT_MATCHED_DN)
#define GET_MATCHED_DN(__conn__, __dn__) \
(ldap_get_option ((__conn__), LDAP_OPT_MATCHED_DN, (__dn__)))
#else
#define GET_MATCHED_DN(__conn__, __dn__) \
(__local_option (*(__dn__) = (__conn__)->ld_matched))
#endif
#if defined(HAVE_LDAP_SET_OPTION) && defined(LDAP_OPT_DEREF)
#define SET_DEREF(__conn__, __deref__) \
(ldap_set_option ((__conn__), LDAP_OPT_DEREF, (__deref__)))
#else
#define SET_DEREF(__conn__, __dref__) \
(__local_option ((__conn__)->ld_deref = *(__deref__)))
#endif
#if defined(HAVE_LDAP_SET_OPTION) && defined(LDAP_OPT_TIMELIMIT)
#define SET_TIMELIMIT(__conn__, __timelimit__) \
(ldap_set_option ((__conn__), LDAP_OPT_TIMELIMIT, (__timelimit__)))
#else
#define SET_TIMELIMIT(__conn__, __timelimit__) \
(__local_option ((__conn__)->ld_timelimit = *(__timelimit__)))
#endif
#if defined(HAVE_LDAP_SET_OPTION) && defined (LDAP_OPT_SIZELIMIT)
#define SET_SIZELIMIT(__conn__, __sizelimit__) \
(ldap_set_option ((__conn__), LDAP_OPT_SIZELIMIT, (__sizelimit__)))
#else
#define SET_SIZELIMIT(__conn__, __sizelimit__) \
(__local_option ((__conn__)->ld_sizelimit = *(__sizelimit__)))
#endif
#if defined(HAVE_LDAP_SET_OPTION) && defined(LDAP_OPT_TIMEOUT)
#define SET_TIMEOUT(__conn__, __timeout__) \
(ldap_set_option ((__conn__), LDAP_OPT_TIMEOUT, (__timeout__)))
#else
#define SET_TIMEOUT(__conn__, __timeout__) \
(__local_option (NULL))
#endif
#if defined(HAVE_LDAP_SET_OPTION) && defined(LDAP_X_OPT_CONNECT_TIMEOUT)
/*
* This is a new option in the Netscape SDK which sets
* the TCP connect timeout. For want of a better value,
* we use the bind_timelimit to control this.
*/
#define SET_CONNECT_TIMEOUT(__conn__, __timeout__) \
(ldap_set_option ((__conn__), LDAP_X_OPT_CONNECT_TIMEOUT, (__timeout__)))
#else
#define SET_CONNECT_TIMEOUT(__conn__, __timeout__) \
(__local_option (NULL))
#endif
#if defined(HAVE_LDAP_SET_OPTION) && defined(LDAP_OPT_NETWORK_TIMEOUT)
#define SET_NETWORK_TIMEOUT(__conn__, __timeout__) \
(ldap_set_option ((__conn__), LDAP_OPT_NETWORK_TIMEOUT, (__timeout__)))
#else
#define SET_NETWORK_TIMEOUT(__conn__, __timeout__) \
(__local_option (NULL))
#endif
#if defined(HAVE_LDAP_SET_OPTION) && defined(LDAP_OPT_REFERRALS)
#define SET_REFERRALS(__conn__, __referrals__) \
(ldap_set_option ((__conn__), LDAP_OPT_REFERRALS, ((*(__referrals__)) ? LDAP_OPT_ON : LDAP_OPT_OFF)))
#else
#define SET_REFERRALS(__conn__, __referrals__) \
(__local_option (NULL))
#endif
#if defined(HAVE_LDAP_SET_OPTION) && defined(LDAP_OPT_RESTART)
#define SET_RESTART(__conn__, __restart__) \
(ldap_set_option ((__conn__), LDAP_OPT_RESTART, ((*(__restart__)) ? LDAP_OPT_ON : LDAP_OPT_OFF)))
#else
#define SET_RESTART(__conn__, __restart__) \
(__local_option (NULL))
#endif
/* Support this in Solaris 9 and others than do not define the OPTION macro */
/* not in Solaris 9? */
# ifndef LDAP_OPT_SSL
# define LDAP_OPT_SSL 0x0A
# endif
#if defined(HAVE_LDAP_SET_OPTION) && defined(LDAP_OPT_SSL)
#define SET_SSL(__conn__, __ssl__) \
(ldap_set_option ((__conn__), LDAP_OPT_SSL, ((*(__ssl__)) ? LDAP_OPT_ON : LDAP_OPT_OFF)))
#else
#define SET_SSL(__conn__, __ssl__) \
(__local_option (NULL))
#endif
#if defined(HAVE_LDAP_SET_OPTION) && defined(LDAP_OPT_X_TLS)
#define SET_TLS(__conn__, __tls__) \
(ldap_set_option ((__conn__), LDAP_OPT_X_TLS, (__tls__)))
#else
#define SET_TLS(__conn__, __tls__) \
(__local_option (NULL))
#endif
#if defined(HAVE_LDAP_SET_OPTION) && defined(LDAP_OPT_X_TLS_RANDOM_FILE)
#define SET_TLS_RANDOM_FILE(__conn__, __randomfile__) \
(ldap_set_option (NULL, LDAP_OPT_X_TLS_RANDOM_FILE, (__randomfile__)))
#else
#define SET_TLS_RANDOM_FILE(__conn__, __randfile) \
(__local_option (NULL))
#endif
#if defined(HAVE_LDAP_SET_OPTION) && defined(LDAP_OPT_X_TLS_CACERTFILE)
#define SET_TLS_CACERTFILE(__conn__, __cacertfile__) \
(ldap_set_option (NULL, LDAP_OPT_X_TLS_CACERTFILE, (__cacertfile__)))
#else
#define SET_TLS_CACERTFILE(__conn__, __certfile__) \
(__local_option (NULL))
#endif
#if defined(HAVE_LDAP_SET_OPTION) && defined(LDAP_OPT_X_TLS_CACERTDIR)
#define SET_TLS_CACERTDIR(__conn__, __cacertdir__) \
(ldap_set_option (NULL, LDAP_OPT_X_TLS_CACERTDIR, (__cacertdir__)))
#else
#define SET_TLS_CACERTDIR(__conn__, __cacertdir__) \
(__local_option (NULL))
#endif
#if defined(HAVE_LDAP_SET_OPTION) && defined(LDAP_OPT_X_TLS_REQUIRE_CERT)
#define SET_TLS_REQUIRE_CERT(__conn__, __checkpeer__) \
(ldap_set_option (NULL, LDAP_OPT_X_TLS_REQUIRE_CERT, (__checkpeer__)))
#else
#define SET_TLS_REQUIRE_CERT(__conn__, __checkpeer__) \
(__local_option (NULL))
#endif
#if defined(HAVE_LDAP_SET_OPTION) && defined(LDAP_OPT_X_TLS_CRLCHECK)
#define SET_TLS_CRLCHECK(__conn__, __crlcheck__) \
(ldap_set_option (NULL, LDAP_OPT_X_TLS_CRLCHECK, (__crlcheck__)))
#else
#define SET_TLS_CRLCHECK(__conn__, __crlcheck__) \
(__local_option (NULL))
#endif
#if defined(HAVE_LDAP_SET_OPTION) && defined(LDAP_OPT_X_TLS_CIPHER_SUITE)
#define SET_TLS_CIPHER_SUITE(__conn__, __ciphers__) \
(ldap_set_option (NULL, LDAP_OPT_X_TLS_CIPHER_SUITE, (__ciphers__)))
#else
#define SET_TLS_CIPHER_SUITE(__conn__, __ciphersuite__) \
(__local_option (NULL))
#endif
#if defined(HAVE_LDAP_SET_OPTION) && defined(LDAP_OPT_X_TLS_CERTFILE)
#define SET_TLS_CERTFILE(__conn__, __certfile__) \
(ldap_set_option (NULL, LDAP_OPT_X_TLS_CERTFILE, (__certfile__)))
#else
#define SET_TLS_CERTFILE(__conn__, __certfile__) \
(__local_option (NULL))
#endif
#if defined(HAVE_LDAP_SET_OPTION) && defined(LDAP_OPT_X_TLS_KEYFILE)
#define SET_TLS_KEYFILE(__conn__, __keyfile__) \
(ldap_set_option (NULL, LDAP_OPT_X_TLS_KEYFILE, (__keyfile__)))
#else
#define SET_TLS_KEYFILE(__conn_, __keyfile__) \
(__local_option (NULL))
#endif
#if defined(HAVE_LDAP_SET_OPTION) && defined(LDAP_OPT_X_SASL_SECPROPS)
#define SET_SASL_SECPROPS(__conn__, __sasl_secprops__) \
(ldap_set_option ((__conn__), LDAP_OPT_X_SASL_SECPROPS, (__sasl_secprops__)))
#else
#define SET_SASL_SECPROPS(__conn__, __sasl_secprops__) \
(__local_option (NULL))
#endif
const char *
__nss_ldap_status2string (NSS_STATUS stat)
{
switch (stat)
{
case NSS_TRYAGAIN: return "NSS_TRYAGAIN";
case NSS_UNAVAIL: return "NSS_UNAVAIL";
case NSS_NOTFOUND: return "NSS_NOTFOUND";
case NSS_SUCCESS: return "NSS_SUCCESS";
case NSS_RETURN: return "NSS_RETURN";
default: return "UNKNOWN";
}
}
static NSS_STATUS
do_map_error (int rc)
{
NSS_STATUS stat;
switch (rc)
{
case LDAP_SUCCESS:
case LDAP_SIZELIMIT_EXCEEDED:
case LDAP_TIMELIMIT_EXCEEDED:
stat = NSS_SUCCESS;
break;
case LDAP_NO_SUCH_ATTRIBUTE:
case LDAP_UNDEFINED_TYPE:
case LDAP_INAPPROPRIATE_MATCHING:
case LDAP_CONSTRAINT_VIOLATION:
case LDAP_TYPE_OR_VALUE_EXISTS:
case LDAP_INVALID_SYNTAX:
case LDAP_NO_SUCH_OBJECT:
case LDAP_ALIAS_PROBLEM:
case LDAP_INVALID_DN_SYNTAX:
case LDAP_IS_LEAF:
case LDAP_ALIAS_DEREF_PROBLEM:
case LDAP_FILTER_ERROR:
stat = NSS_NOTFOUND;
break;
case LDAP_SERVER_DOWN:
case LDAP_TIMEOUT:
case LDAP_UNAVAILABLE:
case LDAP_BUSY:
#ifdef LDAP_CONNECT_ERROR
case LDAP_CONNECT_ERROR:
#endif /* LDAP_CONNECT_ERROR */
stat = NSS_TRYAGAIN;
break;
case LDAP_LOCAL_ERROR:
case LDAP_INVALID_CREDENTIALS:
default:
stat = NSS_UNAVAIL;
break;
}
return stat;
}
/*
* Rebind functions.
*/
#if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
#if LDAP_SET_REBIND_PROC_ARGS == 3
static int
do_rebind (LDAP * ld, LDAP_CONST char *url, ber_tag_t request,
ber_int_t msgid, void *arg)
#else
static int
do_rebind (LDAP * ld, LDAP_CONST char *url, int request, ber_int_t msgid)
#endif
{
char *who = NULL, *cred = NULL;
int timelimit;
int with_sasl = 0;
uid_t euid;
ldap_config_t *cfg;
ldap_session_t *session = &__session;
int rc;
debug ("==> do_rebind");
cfg = session->ls_config;
euid = geteuid ();
if (euid == 0)
{
who = (cfg->ldc_rootbinddn != NULL) ? cfg->ldc_rootbinddn : cfg->ldc_binddn;
with_sasl = (cfg->ldc_rootsaslid != NULL) ? cfg->ldc_rootusesasl : cfg->ldc_usesasl;
if (with_sasl)
{
cred = (cfg->ldc_rootsaslid != NULL) ? cfg->ldc_rootsaslid : cfg->ldc_saslid;
}
else
{
cred = (cfg->ldc_rootbindpw != NULL) ? cfg->ldc_rootbindpw : cfg->ldc_bindpw;
}
}
else
{
who = cfg->ldc_binddn;
with_sasl = cfg->ldc_usesasl;
if (with_sasl)
{
cred = cfg->ldc_saslid;
}
else
{
cred = cfg->ldc_bindpw;
}
}
timelimit = cfg->ldc_bind_timelimit;
#ifdef HAVE_LDAP_START_TLS_S
if (cfg->ldc_ssl_on == SSL_START_TLS)
{
int version;
if (GET_PROTOCOL_VERSION (session->ls_conn, &version) == LDAP_OPT_SUCCESS)
{
if (version < LDAP_VERSION3)
{
version = LDAP_VERSION3;
SET_PROTOCOL_VERSION (session->ls_conn, &version);
}
}
if (do_start_tls (session) == LDAP_SUCCESS)
{
debug ("TLS startup succeeded");
}
else
{
debug ("TLS startup failed");
return NSS_UNAVAIL;
}
}
#endif /* HAVE_LDAP_START_TLS_S */
rc = do_bind (session, timelimit, with_sasl ? cred : who, with_sasl ? NULL : cred, with_sasl);
debug ("<== do_rebind");
return rc;
}
#else
#if LDAP_SET_REBIND_PROC_ARGS == 3
static int
do_rebind (LDAP * ld, char **whop, char **credp, int *methodp,
int freeit, void *arg)
#elif LDAP_SET_REBIND_PROC_ARGS == 2
static int
do_rebind (LDAP * ld, char **whop, char **credp, int *methodp, int freeit)
#endif
{
uid_t euid;
ldap_config_t *cfg;
ldap_session_t *session = &__session;
debug ("==> do_rebind");
cfg = session->ls_config;
euid = geteuid ();
if (freeit != 0)
{
if (*whop != NULL)
free (*whop);
if (*credp != NULL)
free (*credp);
}
/*
* If we are running as root and we have a root binddn
* then use the root binddn and root bindpw
* (use the ordinary bindpw if a root one has not been provided)
*/
if (euid == 0 && cfg->ldc_rootbinddn != NULL)
{
*whop = strdup(cfg->ldc_rootbinddn);
*credp = ((cfg->ldc_rootbindpw != NULL)
? strdup (cfg->ldc_rootbindpw)
: ((cfg->ldc_bindpw != NULL)
? strdup (cfg->ldc_bindpw)
: NULL));
}
/*
* If not running as root
* then use the base binddn and the bindpw (if supplied)
*/
else if (cfg->ldc_binddn != NULL)
{
*whop = strdup (cfg->ldc_binddn);
*credp = ((cfg->ldc_bindpw != NULL)
? strdup (cfg->ldc_bindpw)
: NULL);
}
else
{
*whop = NULL;
*credp = NULL;
}
*methodp = LDAP_AUTH_SIMPLE;
debug ("<== do_rebind");
return LDAP_SUCCESS;
}
#endif
#ifdef HAVE_NSSWITCH_H
/*
* Default destructor.
* The entry point for this function is the destructor in the dispatch
* table for the switch. Thus, it's safe to grab the mutex from this
* function.
*/
NSS_STATUS
_nss_ldap_default_destr (nss_backend_t * be, void *args)
{
debug ("==> _nss_ldap_default_destr");
if ((((nss_ldap_backend_t *) be)->state) != NULL)
{
_nss_ldap_enter ();
_nss_ldap_ent_context_release (&(((nss_ldap_backend_t *) be)->state));
_nss_ldap_leave ();
}
/* Ditch the backend. */
free (be);
debug ("<== _nss_ldap_default_destr");
return NSS_SUCCESS;
}
/*
* This is the default "constructor" which gets called from each
* constructor, in the NSS dispatch table.
*/
NSS_STATUS
_nss_ldap_default_constr (nss_ldap_backend_t * be)
{
debug ("==> _nss_ldap_default_constr");
be->state = NULL;
#ifdef HPUX
__thread_mutex_init (&__lock, NULL);
#endif
debug ("<== _nss_ldap_default_constr");
return NSS_SUCCESS;
}
#endif /* HAVE_NSSWITCH_H */
#if defined(HAVE_PTHREAD_ATFORK) || defined(HAVE_LIBC_LOCK_H) || defined(HAVE_BITS_LIBC_LOCK_H)
static void
do_atfork_prepare (void)
{
debug ("==> do_atfork_prepare");
_nss_ldap_enter ();
debug ("<== do_atfork_prepare");
}
static void
do_atfork_parent (void)
{
debug ("==> do_atfork_parent");
_nss_ldap_leave ();
debug ("<== do_atfork_parent");
}
static void
do_atfork_child (void)
{
ldap_session_t *session = &__session;
sigset_t unblock, mask;
debug ("==> do_atfork_child");
sigemptyset(&unblock);
sigaddset(&unblock, SIGPIPE);
sigprocmask(SIG_UNBLOCK, &unblock, &mask);
do_close_no_unbind (session);
sigprocmask(SIG_SETMASK, &mask, NULL);
_nss_ldap_leave ();
debug ("<== do_atfork_child");
}
static void
do_atfork_setup (void)
{
debug ("==> do_atfork_setup");
(void) ATFORK_DO (do_atfork_prepare, do_atfork_parent, do_atfork_child);
debug ("<== do_atfork_setup");
}
static NSS_STATUS
do_thread_once()
{
debug ("==> do_thread_once");
#if defined(HAVE_PTHREAD_ONCE) && defined(HAVE_PTHREAD_ATFORK)
if (pthread_once (&__once, do_atfork_setup) != 0)
{
debug ("<== do_thread_once (pthread_once failed)");
return NSS_UNAVAIL;
}
#elif defined(HAVE_PTHREAD_ATFORK) && ( defined(HAVE_LIBC_LOCK_H) || defined(HAVE_BITS_LIBC_LOCK_H) )
__libc_once (__once, do_atfork_setup);
#elif defined(HAVE_LIBC_LOCK_H) || defined(HAVE_BITS_LIBC_LOCK_H)
/*
* Only install the pthread_atfork() handlers if
* we are linked against libpthreads. Otherwise,
* do close the session when the PID changes.
*/
if !(__pthread_once == NULL || __pthread_atfork == NULL)
__libc_once (__once, do_atfork_setup);
#endif
debug ("<== do_thread_once");
return NSS_SUCCESS;
}
static int
pthreading_active(void)
{
#if defined(HAVE_PTHREAD_ATFORK)
return 1;
#elif defined(HAVE_LIBC_LOCK_H) || defined(HAVE_BITS_LIBC_LOCK_H)
return (__pthread_once != NULL &&__pthread_atfork != NULL && __once != PTHREAD_ONCE_INIT);
#else
return 0;
#endif
}
#endif
/*
* Acquires global lock, blocks SIGPIPE.
*/
void
_nss_ldap_enter (void)
{
#ifdef HAVE_SIGACTION
struct sigaction new_handler;
memset (&new_handler, 0, sizeof (new_handler));
#if 0
/* XXX need to test for sa_sigaction, not on all platforms */
new_handler.sa_sigaction = NULL;
#endif
new_handler.sa_handler = SIG_IGN;
sigemptyset (&new_handler.sa_mask);
new_handler.sa_flags = 0;
#endif /* HAVE_SIGACTION */
debug ("==> _nss_ldap_enter");
NSS_LDAP_LOCK (__lock);
/*
* Patch for Debian Bug 130006:
* ignore SIGPIPE for all LDAP operations.
*
* The following bug was reintroduced in nss_ldap-213 and is fixed here:
* http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=84344
*
* See:
* http://www.gnu.org/software/libc/manual/html_node/Signal-and-Sigaction.html
* for more details.
*/
#ifdef HAVE_SIGACTION
__sigaction_retval = sigaction (SIGPIPE, &new_handler, &__stored_handler);
#elif defined(HAVE_SIGSET)
__sigpipe_handler = sigset (SIGPIPE, SIG_IGN);
#else
__sigpipe_handler = signal (SIGPIPE, SIG_IGN);
#endif /* HAVE_SIGSET */
debug ("<== _nss_ldap_enter");
return;
}
/*
* Releases global mutex, releases SIGPIPE.
*/
void
_nss_ldap_leave (void)
{
debug ("==> _nss_ldap_leave");
#ifdef HAVE_SIGACTION
if (__sigaction_retval == 0)
(void) sigaction (SIGPIPE, &__stored_handler, NULL);
#else
if (__sigpipe_handler != SIG_ERR && __sigpipe_handler != SIG_IGN)
{
# ifdef HAVE_SIGSET
(void) sigset (SIGPIPE, __sigpipe_handler);
# else
(void) signal (SIGPIPE, __sigpipe_handler);
# endif /* HAVE_SIGSET */
}
#endif /* HAVE_SIGACTION */
NSS_LDAP_UNLOCK (__lock);
debug ("<== _nss_ldap_leave");
return;
}
static void
do_set_sockopts (ldap_session_t *session)
{
/*
* Netscape SSL-enabled LDAP library does not
* return the real socket.
*/
#ifndef HAVE_LDAPSSL_CLIENT_INIT
int sd = -1;