342 lines
8.3 KiB
C
342 lines
8.3 KiB
C
/*
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* Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
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* Copyright (C) 2003-2012 Match Grun and the Claws Mail team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/*
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* Some utility functions to access LDAP servers.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#include "claws-features.h"
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#endif
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#ifdef USE_LDAP
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#include <glib.h>
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#include <glib/gi18n.h>
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#include <string.h>
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#include <sys/time.h>
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#include <errno.h>
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#include "common/utils.h"
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#include "ldaputil.h"
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#include "ldapserver.h"
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#include "ldapctrl.h"
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#define SYLDAP_TEST_FILTER "(objectclass=*)"
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#define SYLDAP_SEARCHBASE_V2 "cn=config"
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#define SYLDAP_SEARCHBASE_V3 ""
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#define SYLDAP_V2_TEST_ATTR "database"
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#define SYLDAP_V3_TEST_ATTR "namingcontexts"
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/**
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* Attempt to discover the base DN for a server using LDAP version 3.
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* \param ld LDAP handle for a connected server.
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* \param tov Timeout value (seconds), or 0 for none, default 30 secs.
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* \return List of Base DN's, or NULL if could not read. List should be
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* g_free() when done.
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*/
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static GList *ldaputil_test_v3( LDAP *ld, gint tov, gint *errcode ) {
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GList *baseDN = NULL;
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gint rc, i;
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LDAPMessage *result = NULL, *e;
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gchar *attribs[2];
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BerElement *ber;
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gchar *attribute;
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struct berval **vals;
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struct timeval timeout;
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/* Set timeout */
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timeout.tv_usec = 0L;
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if( tov > 0 ) {
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timeout.tv_sec = tov;
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}
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else {
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timeout.tv_sec = 30L;
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}
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/* Test for LDAP version 3 */
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attribs[0] = SYLDAP_V3_TEST_ATTR;
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attribs[1] = NULL;
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rc = ldap_search_ext_s(
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ld, SYLDAP_SEARCHBASE_V3, LDAP_SCOPE_BASE, SYLDAP_TEST_FILTER,
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attribs, 0, NULL, NULL, &timeout, 0, &result );
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if( rc == LDAP_SUCCESS ) {
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/* Process entries */
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for( e = ldap_first_entry( ld, result );
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e != NULL;
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e = ldap_next_entry( ld, e ) )
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{
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/* Process attributes */
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for( attribute = ldap_first_attribute( ld, e, &ber );
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attribute != NULL;
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attribute = ldap_next_attribute( ld, e, ber ) )
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{
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if( strcasecmp(
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attribute, SYLDAP_V3_TEST_ATTR ) == 0 )
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{
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vals = ldap_get_values_len( ld, e, attribute );
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if( vals != NULL ) {
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for( i = 0; vals[i] != NULL; i++ ) {
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baseDN = g_list_append(
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baseDN, g_strndup( vals[i]->bv_val, vals[i]->bv_len ) );
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}
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}
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ldap_value_free_len( vals );
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}
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ldap_memfree( attribute );
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}
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if( ber != NULL ) {
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ber_free( ber, 0 );
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}
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ber = NULL;
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}
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} else
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debug_print("LDAP: Error %d (%s)\n", rc, ldaputil_get_error(ld));
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if (errcode)
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*errcode = rc;
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if (result)
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ldap_msgfree( result );
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return baseDN;
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}
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/**
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* Attempt to discover the base DN for a server using LDAP version 2.
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* \param ld LDAP handle for a connected server.
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* \param tov Timeout value (seconds), or 0 for none, default 30 secs.
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* \return List of Base DN's, or NULL if could not read. List should be
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* g_free() when done.
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*/
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static GList *ldaputil_test_v2( LDAP *ld, gint tov ) {
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GList *baseDN = NULL;
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gint rc, i;
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LDAPMessage *result = NULL, *e;
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gchar *attribs[1];
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BerElement *ber;
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gchar *attribute;
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struct berval **vals;
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struct timeval timeout;
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/* Set timeout */
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timeout.tv_usec = 0L;
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if( tov > 0 ) {
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timeout.tv_sec = tov;
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}
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else {
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timeout.tv_sec = 30L;
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}
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attribs[0] = NULL;
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rc = ldap_search_ext_s(
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ld, SYLDAP_SEARCHBASE_V2, LDAP_SCOPE_BASE, SYLDAP_TEST_FILTER,
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attribs, 0, NULL, NULL, &timeout, 0, &result );
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if( rc == LDAP_SUCCESS ) {
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/* Process entries */
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for( e = ldap_first_entry( ld, result );
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e != NULL;
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e = ldap_next_entry( ld, e ) )
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{
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/* Process attributes */
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for( attribute = ldap_first_attribute( ld, e, &ber );
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attribute != NULL;
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attribute = ldap_next_attribute( ld, e, ber ) )
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{
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if( strcasecmp(
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attribute,
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SYLDAP_V2_TEST_ATTR ) == 0 ) {
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vals = ldap_get_values_len( ld, e, attribute );
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if( vals != NULL ) {
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for( i = 0; vals[i] != NULL; i++ ) {
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char *ch, *tmp;
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/*
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* Strip the 'ldb:' from the
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* front of the value.
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*/
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tmp = g_strndup( vals[i]->bv_val, vals[i]->bv_len);
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ch = ( char * ) strchr( tmp, ':' );
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if( ch ) {
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gchar *bn = g_strdup( ++ch );
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g_strchomp( bn );
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g_strchug( bn );
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baseDN = g_list_append(
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baseDN, g_strdup( bn ) );
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g_free( bn );
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}
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g_free(tmp);
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}
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}
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ldap_value_free_len( vals );
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}
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ldap_memfree( attribute );
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}
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if( ber != NULL ) {
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ber_free( ber, 0 );
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}
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ber = NULL;
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}
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}
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if (result)
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ldap_msgfree( result );
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return baseDN;
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}
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int claws_ldap_simple_bind_s( LDAP *ld, LDAP_CONST char *dn, LDAP_CONST char *passwd )
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{
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struct berval cred;
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if ( passwd != NULL ) {
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cred.bv_val = (char *) passwd;
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cred.bv_len = strlen( passwd );
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} else {
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cred.bv_val = "";
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cred.bv_len = 0;
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}
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debug_print("binding: DN->%s\n", dn?dn:"null");
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#ifdef G_OS_UNIX
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return ldap_sasl_bind_s( ld, dn, LDAP_SASL_SIMPLE, &cred,
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NULL, NULL, NULL );
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#else
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return ldap_simple_bind_s(ld, dn, passwd);
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#endif
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}
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/**
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* Attempt to discover the base DN for the server.
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* \param host Host name.
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* \param port Port number.
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* \param bindDN Bind DN (optional).
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* \param bindPW Bind PW (optional).
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* \param tov Timeout value (seconds), or 0 for none, default 30 secs.
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* \return List of Base DN's, or NULL if could not read. This list should be
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* g_free() when done.
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*/
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GList *ldaputil_read_basedn(
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const gchar *host, const gint port, const gchar *bindDN,
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const gchar *bindPW, const gint tov, int ssl, int tls )
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{
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GList *baseDN = NULL;
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LDAP *ld = NULL;
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LdapControl *ctl = ldapctl_create();
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gint rc;
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if( host == NULL )
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return NULL;
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if( port < 1 )
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return NULL;
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ldapctl_set_tls(ctl, tls);
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ldapctl_set_ssl(ctl, ssl);
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ldapctl_set_port(ctl, port);
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ldapctl_set_host(ctl, host);
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ldapctl_set_timeout(ctl, tov);
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ldapctl_set_bind_dn(ctl, bindDN);
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ldapctl_set_bind_password(ctl, bindPW, FALSE, FALSE);
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ld = ldapsvr_connect(ctl);
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if (ld == NULL) {
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ldapctl_free(ctl);
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return NULL;
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}
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baseDN = ldaputil_test_v3( ld, tov, &rc );
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if (baseDN)
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debug_print("Using LDAP v3\n");
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#ifdef G_OS_UNIX
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if( baseDN == NULL && !LDAP_API_ERROR(rc) ) {
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#else
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if( baseDN == NULL) {
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#endif
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baseDN = ldaputil_test_v2( ld, tov );
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if (baseDN)
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debug_print("Using LDAP v2\n");
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}
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if (ld)
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ldapsvr_disconnect(ld);
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ldapctl_free(ctl);
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return baseDN;
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}
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/**
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* Attempt to connect to the server.
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* Enter:
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* \param host Host name.
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* \param port Port number.
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* \return <i>TRUE</i> if connected successfully.
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*/
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gboolean ldaputil_test_connect( const gchar *host, const gint port, int ssl, int tls, int secs ) {
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gboolean retVal = FALSE;
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LdapControl *ctl = ldapctl_create();
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LDAP *ld;
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ldapctl_set_tls(ctl, tls);
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ldapctl_set_ssl(ctl, ssl);
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ldapctl_set_port(ctl, port);
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ldapctl_set_host(ctl, host);
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ldapctl_set_timeout(ctl, secs);
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ld = ldapsvr_connect(ctl);
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if( ld != NULL ) {
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ldapsvr_disconnect(ld);
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debug_print("ld != NULL\n");
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retVal = TRUE;
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}
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ldapctl_free(ctl);
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return retVal;
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}
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/**
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* Test whether LDAP libraries installed.
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* Return: TRUE if library available.
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*/
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gboolean ldaputil_test_ldap_lib( void ) {
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return TRUE;
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}
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const gchar *ldaputil_get_error(LDAP *ld)
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{
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gchar *ld_error = NULL;
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static gchar error[512];
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ldap_get_option( ld, LDAP_OPT_ERROR_STRING, &ld_error);
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if (ld_error != NULL)
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strncpy2(error, ld_error, sizeof(error));
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else
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strncpy2(error, _("Unknown error"), sizeof(error));
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#ifndef G_OS_WIN32
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/* From https://msdn.microsoft.com/en-us/library/aa366594%28v=vs.85%29.aspx
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* "LDAP_OPT_ERROR_STRING returns a pointer to an internal static
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* string table, and ldap_memfree should not be called when using
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* this session option."
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*/
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ldap_memfree(ld_error);
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#endif
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return error;
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}
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#endif /* USE_LDAP */
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/*
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* End of Source.
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*/
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