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diff --git a/servers/slapd/back-passwd/search.c b/servers/slapd/back-passwd/search.c
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+/* search.c - /etc/passwd backend search function */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2022 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+/* Portions Copyright (c) 1995 Regents of the University of Michigan.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and that due credit is given
+ * to the University of Michigan at Ann Arbor. The name of the University
+ * may not be used to endorse or promote products derived from this
+ * software without specific prior written permission. This software
+ * is provided ``as is'' without express or implied warranty.
+ */
+/* ACKNOWLEDGEMENTS:
+ * This work was originally developed by the University of Michigan
+ * (as part of U-MICH LDAP). Additional significant contributors
+ * include:
+ * Hallvard B. Furuseth
+ * Howard Chu
+ * Kurt D. Zeilenga
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+
+#include <ac/ctype.h>
+#include <ac/socket.h>
+#include <ac/string.h>
+#include <ac/time.h>
+
+#include <pwd.h>
+
+#include "slap.h"
+#include "back-passwd.h"
+
+static void pw_start( Backend *be );
+
+static int pw2entry(
+ Backend *be,
+ struct passwd *pw,
+ Entry *ep );
+
+int
+passwd_back_search(
+ Operation *op,
+ SlapReply *rs )
+{
+ struct passwd *pw;
+ time_t stoptime = (time_t)-1;
+
+ LDAPRDN rdn = NULL;
+ struct berval parent = BER_BVNULL;
+
+ AttributeDescription *ad_objectClass = slap_schema.si_ad_objectClass;
+
+ if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
+ stoptime = op->o_time + op->ors_tlimit;
+ }
+
+ /* Handle a query for the base of this backend */
+ if ( be_issuffix( op->o_bd, &op->o_req_ndn ) ) {
+ struct berval val;
+
+ rs->sr_matched = op->o_req_dn.bv_val;
+
+ if( op->ors_scope != LDAP_SCOPE_ONELEVEL ) {
+ AttributeDescription *desc = NULL;
+ char *next;
+ Entry e = { 0 };
+
+ /* Create an entry corresponding to the base DN */
+ e.e_name.bv_val = ch_strdup( op->o_req_dn.bv_val );
+ e.e_name.bv_len = op->o_req_dn.bv_len;
+ e.e_nname.bv_val = ch_strdup( op->o_req_ndn.bv_val );
+ e.e_nname.bv_len = op->o_req_ndn.bv_len;
+
+ /* Use the first attribute of the DN
+ * as an attribute within the entry itself.
+ */
+ if( ldap_bv2rdn( &op->o_req_dn, &rdn, &next,
+ LDAP_DN_FORMAT_LDAP ) )
+ {
+ rs->sr_err = LDAP_INVALID_DN_SYNTAX;
+ goto done;
+ }
+
+ if( slap_bv2ad( &rdn[0]->la_attr, &desc, &rs->sr_text )) {
+ rs->sr_err = LDAP_NO_SUCH_OBJECT;
+ ldap_rdnfree(rdn);
+ goto done;
+ }
+
+ attr_merge_normalize_one( &e, desc, &rdn[0]->la_value, NULL );
+
+ ldap_rdnfree(rdn);
+ rdn = NULL;
+
+ /* Every entry needs an objectclass. We don't really
+ * know if our hardcoded choice here agrees with the
+ * DN that was configured for this backend, but it's
+ * better than nothing.
+ *
+ * should be a configurable item
+ */
+ BER_BVSTR( &val, "organizationalUnit" );
+ attr_merge_one( &e, ad_objectClass, &val, NULL );
+
+ if ( test_filter( op, &e, op->ors_filter ) == LDAP_COMPARE_TRUE ) {
+ rs->sr_entry = &e;
+ rs->sr_attrs = op->ors_attrs;
+ rs->sr_flags = REP_ENTRY_MODIFIABLE;
+ send_search_entry( op, rs );
+ rs->sr_flags = 0;
+ rs->sr_attrs = NULL;
+ }
+
+ entry_clean( &e );
+ }
+
+ if ( op->ors_scope != LDAP_SCOPE_BASE ) {
+ /* check all our "children" */
+
+ ldap_pvt_thread_mutex_lock( &passwd_mutex );
+ pw_start( op->o_bd );
+ for ( pw = getpwent(); pw != NULL; pw = getpwent() ) {
+ Entry e = { 0 };
+
+ /* check for abandon */
+ if ( op->o_abandon ) {
+ endpwent();
+ ldap_pvt_thread_mutex_unlock( &passwd_mutex );
+ return( SLAPD_ABANDON );
+ }
+
+ /* check time limit */
+ if ( op->ors_tlimit != SLAP_NO_LIMIT
+ && slap_get_time() > stoptime )
+ {
+ send_ldap_error( op, rs, LDAP_TIMELIMIT_EXCEEDED, NULL );
+ endpwent();
+ ldap_pvt_thread_mutex_unlock( &passwd_mutex );
+ return( 0 );
+ }
+
+ if ( pw2entry( op->o_bd, pw, &e ) ) {
+ rs->sr_err = LDAP_OTHER;
+ endpwent();
+ ldap_pvt_thread_mutex_unlock( &passwd_mutex );
+ goto done;
+ }
+
+ if ( test_filter( op, &e, op->ors_filter ) == LDAP_COMPARE_TRUE ) {
+ /* check size limit */
+ if ( --op->ors_slimit == -1 ) {
+ send_ldap_error( op, rs, LDAP_SIZELIMIT_EXCEEDED, NULL );
+ endpwent();
+ ldap_pvt_thread_mutex_unlock( &passwd_mutex );
+ return( 0 );
+ }
+
+ rs->sr_entry = &e;
+ rs->sr_attrs = op->ors_attrs;
+ rs->sr_flags = REP_ENTRY_MODIFIABLE;
+ send_search_entry( op, rs );
+ rs->sr_flags = 0;
+ rs->sr_entry = NULL;
+ }
+
+ entry_clean( &e );
+ }
+ endpwent();
+ ldap_pvt_thread_mutex_unlock( &passwd_mutex );
+ }
+
+ } else {
+ char *next;
+ Entry e = { 0 };
+ int rc;
+
+ if (! be_issuffix( op->o_bd, &op->o_req_ndn ) ) {
+ dnParent( &op->o_req_ndn, &parent );
+ }
+
+ /* This backend is only one layer deep. Don't answer requests for
+ * anything deeper than that.
+ */
+ if( !be_issuffix( op->o_bd, &parent ) ) {
+ int i;
+ for( i=0; op->o_bd->be_nsuffix[i].bv_val != NULL; i++ ) {
+ if( dnIsSuffix( &op->o_req_ndn, &op->o_bd->be_nsuffix[i] ) ) {
+ rs->sr_matched = op->o_bd->be_suffix[i].bv_val;
+ break;
+ }
+ }
+ rs->sr_err = LDAP_NO_SUCH_OBJECT;
+ goto done;
+ }
+
+ if( op->ors_scope == LDAP_SCOPE_ONELEVEL ) {
+ goto done;
+ }
+
+ if ( ldap_bv2rdn( &op->o_req_dn, &rdn, &next,
+ LDAP_DN_FORMAT_LDAP ))
+ {
+ rs->sr_err = LDAP_OTHER;
+ goto done;
+ }
+
+ ldap_pvt_thread_mutex_lock( &passwd_mutex );
+ pw_start( op->o_bd );
+ pw = getpwnam( rdn[0]->la_value.bv_val );
+ if ( pw == NULL ) {
+ rs->sr_matched = parent.bv_val;
+ rs->sr_err = LDAP_NO_SUCH_OBJECT;
+ ldap_pvt_thread_mutex_unlock( &passwd_mutex );
+ goto done;
+ }
+
+ rc = pw2entry( op->o_bd, pw, &e );
+ ldap_pvt_thread_mutex_unlock( &passwd_mutex );
+ if ( rc ) {
+ rs->sr_err = LDAP_OTHER;
+ goto done;
+ }
+
+ if ( test_filter( op, &e, op->ors_filter ) == LDAP_COMPARE_TRUE ) {
+ rs->sr_entry = &e;
+ rs->sr_attrs = op->ors_attrs;
+ rs->sr_flags = REP_ENTRY_MODIFIABLE;
+ send_search_entry( op, rs );
+ rs->sr_flags = 0;
+ rs->sr_entry = NULL;
+ rs->sr_attrs = NULL;
+ }
+
+ entry_clean( &e );
+ }
+
+done:
+ if( rs->sr_err != LDAP_NO_SUCH_OBJECT ) rs->sr_matched = NULL;
+ send_ldap_result( op, rs );
+
+ if( rdn != NULL ) ldap_rdnfree( rdn );
+
+ return( 0 );
+}
+
+static void
+pw_start(
+ Backend *be
+)
+{
+ endpwent();
+
+#ifdef HAVE_SETPWFILE
+ if ( be->be_private != NULL ) {
+ (void) setpwfile( (char *) be->be_private );
+ }
+#endif /* HAVE_SETPWFILE */
+}
+
+static int
+pw2entry( Backend *be, struct passwd *pw, Entry *e )
+{
+ size_t pwlen;
+ struct berval val;
+ struct berval bv;
+
+ int rc;
+
+ /*
+ * from pw we get pw_name and make it cn
+ * give it an objectclass of person.
+ */
+
+ pwlen = strlen( pw->pw_name );
+ val.bv_len = STRLENOF("uid=,") + ( pwlen + be->be_suffix[0].bv_len );
+ val.bv_val = ch_malloc( val.bv_len + 1 );
+
+ /* rdn attribute type should be a configurable item */
+ sprintf( val.bv_val, "uid=%s,%s",
+ pw->pw_name, be->be_suffix[0].bv_val );
+
+ rc = dnNormalize( 0, NULL, NULL, &val, &bv, NULL );
+ if( rc != LDAP_SUCCESS ) {
+ free( val.bv_val );
+ return( -1 );
+ }
+
+ e->e_name = val;
+ e->e_nname = bv;
+
+ e->e_attrs = NULL;
+
+ /* objectclasses should be configurable items */
+ BER_BVSTR( &val, "person" );
+ attr_merge_one( e, slap_schema.si_ad_objectClass, &val, NULL );
+
+ BER_BVSTR( &val, "uidObject" );
+ attr_merge_one( e, slap_schema.si_ad_objectClass, &val, NULL );
+
+ val.bv_val = pw->pw_name;
+ val.bv_len = pwlen;
+ attr_merge_normalize_one( e, slap_schema.si_ad_uid, &val, NULL ); /* required by uidObject */
+ attr_merge_normalize_one( e, slap_schema.si_ad_cn, &val, NULL ); /* required by person */
+ attr_merge_normalize_one( e, ad_sn, &val, NULL ); /* required by person */
+
+#ifdef HAVE_STRUCT_PASSWD_PW_GECOS
+ /*
+ * if gecos is present, add user's full name as a cn. first process it
+ * according to standard BSD usage. If the processed cn has
+ * a space, use the tail as the surname.
+ */
+ if (pw->pw_gecos[0]) {
+ char *s;
+ char buf[1024];
+
+ ber_str2bv( pw->pw_gecos, 0, 0, &val );
+ attr_merge_normalize_one( e, ad_desc, &val, NULL );
+
+ s = strchr( val.bv_val, (unsigned char)',' );
+ if ( s ) {
+ *s = '\0';
+ val.bv_len = s - val.bv_val;
+ }
+
+ s = strchr( val.bv_val, (unsigned char)'&' );
+ if ( s ) {
+ unsigned r = sizeof buf;
+ /* if name with expanded `&` fits in buf */
+ if ( val.bv_len + pwlen <= r ) {
+ char * d = buf;
+
+ for (;;) {
+ size_t const i = s - val.bv_val;
+ memcpy( d, val.bv_val, i );
+ d += i;
+ memcpy( d, pw->pw_name, pwlen );
+ *d = TOUPPER((unsigned char)*pw->pw_name);
+ d += pwlen;
+ r -= pwlen + i;
+ val.bv_len -= i + 1;
+ val.bv_val = s + 1;
+
+ s = strchr( val.bv_val, (unsigned char)'&' );
+ if (!(s && ( val.bv_len + pwlen <= r )))
+ break;
+ }
+ strcpy( d, val.bv_val );
+ val.bv_len = d - buf + val.bv_len;
+ val.bv_val = buf;
+ } // 1st fits
+ } // 1st &
+
+ if ( val.bv_len && strcasecmp( val.bv_val, pw->pw_name ) ) {
+ attr_merge_normalize_one( e, slap_schema.si_ad_cn, &val, NULL );
+ }
+
+ if ( ( s = strrchr(val.bv_val, ' ' ) ) ) {
+ ber_str2bv( s + 1, 0, 0, &val );
+ attr_merge_normalize_one( e, ad_sn, &val, NULL );
+ }
+ }
+#endif /* HAVE_STRUCT_PASSWD_PW_GECOS */
+
+ return( 0 );
+}
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