1 files changed, 460 insertions, 0 deletions

diff --git a/contrib/slapd-modules/samba4/pguid.c b/contrib/slapd-modules/samba4/pguid.c
new file mode 100644
index 0000000..ae7d71e
--- /dev/null
+++ b/contrib/slapd-modules/samba4/pguid.c
@@ -0,0 +1,460 @@
+/* pguid.c - Parent GUID value overlay */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * Portions Copyright 2008 Pierangelo Masarati.
+ * 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>.
+ */
+/* ACKNOWLEDGEMENTS:
+ * This work was initially developed by Pierangelo Masarati
+ * for inclusion in OpenLDAP Software.
+ */
+
+#include "portable.h"
+
+#ifdef SLAPD_OVER_PGUID
+
+#include <stdio.h>
+
+#include "ac/string.h"
+#include "ac/socket.h"
+
+#include "slap.h"
+#include "config.h"
+
+#include "lutil.h"
+
+/*
+ * Maintain an attribute (parentUUID) that contains the value
+ * of the entryUUID of the parent entry (used by Samba4)
+ */
+
+static AttributeDescription	*ad_parentUUID;
+
+static slap_overinst 		pguid;
+
+static int
+pguid_op_add( Operation *op, SlapReply *rs )
+{
+	slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
+
+	struct berval pdn, pndn;
+	Entry *e = NULL;
+	Attribute *a;
+	int rc;
+
+	/* don't care about suffix entry */
+	if ( dn_match( &op->o_req_ndn, &op->o_bd->be_nsuffix[0] ) ) {
+		return SLAP_CB_CONTINUE;
+	}
+
+	dnParent( &op->o_req_dn, &pdn );
+	dnParent( &op->o_req_ndn, &pndn );
+
+	rc = overlay_entry_get_ov( op, &pndn, NULL, slap_schema.si_ad_entryUUID, 0, &e, on );
+	if ( rc != LDAP_SUCCESS || e == NULL ) {
+		Debug( LDAP_DEBUG_ANY, "%s: pguid_op_add: unable to get parent entry DN=\"%s\" (%d)\n",
+			op->o_log_prefix, pdn.bv_val, rc );
+		return SLAP_CB_CONTINUE;
+	}
+
+	a = attr_find( e->e_attrs, slap_schema.si_ad_entryUUID );
+	if ( a == NULL ) {
+		Debug( LDAP_DEBUG_ANY, "%s: pguid_op_add: unable to find entryUUID of parent entry DN=\"%s\" (%d)\n",
+			op->o_log_prefix, pdn.bv_val, rc );
+		
+	} else {
+		assert( a->a_numvals == 1 );
+
+		if ( op->ora_e != NULL ) {
+			attr_merge_one( op->ora_e, ad_parentUUID, &a->a_vals[0], a->a_nvals == a->a_vals ? NULL : &a->a_nvals[0] );
+		
+		} else {
+			Modifications *ml;
+			Modifications *mod;
+
+			assert( op->ora_modlist != NULL );
+
+			for ( ml = op->ora_modlist; ml != NULL; ml = ml->sml_next ) {
+				if ( ml->sml_mod.sm_desc == slap_schema.si_ad_entryUUID ) {
+					break;
+				}
+			}
+
+			if ( ml == NULL ) {
+				ml = op->ora_modlist;
+			}
+
+			mod = (Modifications *) ch_malloc( sizeof( Modifications ) );
+			mod->sml_flags = SLAP_MOD_INTERNAL;
+			mod->sml_op = LDAP_MOD_ADD;
+			mod->sml_desc = ad_parentUUID;
+			mod->sml_type = ad_parentUUID->ad_cname;
+			mod->sml_values = ch_malloc( sizeof( struct berval ) * 2 );
+			mod->sml_nvalues = NULL;
+			mod->sml_numvals = 1;
+
+			ber_dupbv( &mod->sml_values[0], &a->a_vals[0] );
+			BER_BVZERO( &mod->sml_values[1] );
+
+			mod->sml_next = ml->sml_next;
+			ml->sml_next = mod;
+		}
+	}
+
+	if ( e != NULL ) {
+		(void)overlay_entry_release_ov( op, e, 0, on );
+	}
+
+	return SLAP_CB_CONTINUE;
+}
+
+static int
+pguid_op_rename( Operation *op, SlapReply *rs )
+{
+	slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
+
+	Entry *e = NULL;
+	Attribute *a;
+	int rc;
+
+	if ( op->orr_nnewSup == NULL ) {
+		return SLAP_CB_CONTINUE;
+	}
+
+	rc = overlay_entry_get_ov( op, op->orr_nnewSup, NULL, slap_schema.si_ad_entryUUID, 0, &e, on );
+	if ( rc != LDAP_SUCCESS || e == NULL ) {
+		Debug( LDAP_DEBUG_ANY, "%s: pguid_op_rename: unable to get newSuperior entry DN=\"%s\" (%d)\n",
+			op->o_log_prefix, op->orr_newSup->bv_val, rc );
+		return SLAP_CB_CONTINUE;
+	}
+
+	a = attr_find( e->e_attrs, slap_schema.si_ad_entryUUID );
+	if ( a == NULL ) {
+		Debug( LDAP_DEBUG_ANY, "%s: pguid_op_rename: unable to find entryUUID of newSuperior entry DN=\"%s\" (%d)\n",
+			op->o_log_prefix, op->orr_newSup->bv_val, rc );
+		
+	} else {
+		Modifications *mod;
+
+		assert( a->a_numvals == 1 );
+
+		mod = (Modifications *) ch_malloc( sizeof( Modifications ) );
+		mod->sml_flags = SLAP_MOD_INTERNAL;
+		mod->sml_op = LDAP_MOD_REPLACE;
+		mod->sml_desc = ad_parentUUID;
+		mod->sml_type = ad_parentUUID->ad_cname;
+		mod->sml_values = ch_malloc( sizeof( struct berval ) * 2 );
+		mod->sml_nvalues = NULL;
+		mod->sml_numvals = 1;
+
+		ber_dupbv( &mod->sml_values[0], &a->a_vals[0] );
+		BER_BVZERO( &mod->sml_values[1] );
+
+		mod->sml_next = op->orr_modlist;
+		op->orr_modlist = mod;
+	}
+
+	if ( e != NULL ) {
+		(void)overlay_entry_release_ov( op, e, 0, on );
+	}
+
+	return SLAP_CB_CONTINUE;
+}
+
+static int
+pguid_db_init(
+	BackendDB	*be,
+	ConfigReply	*cr)
+{
+	if ( SLAP_ISGLOBALOVERLAY( be ) ) {
+		Log0( LDAP_DEBUG_ANY, LDAP_LEVEL_ERR,
+			"pguid_db_init: pguid cannot be used as global overlay.\n" );
+		return 1;
+	}
+
+	if ( be->be_nsuffix == NULL ) {
+		Log0( LDAP_DEBUG_ANY, LDAP_LEVEL_ERR,
+			"pguid_db_init: database must have suffix\n" );
+		return 1;
+	}
+
+	if ( BER_BVISNULL( &be->be_rootndn ) || BER_BVISEMPTY( &be->be_rootndn ) ) {
+		Log1( LDAP_DEBUG_ANY, LDAP_LEVEL_ERR,
+			"pguid_db_init: missing rootdn for database DN=\"%s\", YMMV\n",
+			be->be_suffix[ 0 ].bv_val );
+	}
+
+	return 0;
+}
+
+typedef struct pguid_mod_t {
+	struct berval ndn;
+	struct berval pguid;
+	struct pguid_mod_t *next;
+} pguid_mod_t;
+
+typedef struct {
+	slap_overinst *on;
+	pguid_mod_t *mods;
+} pguid_repair_cb_t;
+
+static int
+pguid_repair_cb( Operation *op, SlapReply *rs )
+{
+	int rc;
+	pguid_repair_cb_t *pcb = op->o_callback->sc_private;
+	Entry *e = NULL;
+	Attribute *a;
+	struct berval pdn, pndn;
+
+	switch ( rs->sr_type ) {
+	case REP_SEARCH:
+		break;
+
+	case REP_SEARCHREF:
+	case REP_RESULT:
+		return rs->sr_err;
+
+	default:
+		assert( 0 );
+	}
+
+	assert( rs->sr_entry != NULL );
+
+	dnParent( &rs->sr_entry->e_name, &pdn );
+	dnParent( &rs->sr_entry->e_nname, &pndn );
+
+	rc = overlay_entry_get_ov( op, &pndn, NULL, slap_schema.si_ad_entryUUID, 0, &e, pcb->on );
+	if ( rc != LDAP_SUCCESS || e == NULL ) {
+		Debug( LDAP_DEBUG_ANY, "%s: pguid_repair_cb: unable to get parent entry DN=\"%s\" (%d)\n",
+			op->o_log_prefix, pdn.bv_val, rc );
+		return 0;
+	}
+
+	a = attr_find( e->e_attrs, slap_schema.si_ad_entryUUID );
+	if ( a == NULL ) {
+		Debug( LDAP_DEBUG_ANY, "%s: pguid_repair_cb: unable to find entryUUID of parent entry DN=\"%s\" (%d)\n",
+			op->o_log_prefix, pdn.bv_val, rc );
+		
+	} else {
+		ber_len_t len;
+		pguid_mod_t *mod;
+
+		assert( a->a_numvals == 1 );
+
+		len = sizeof( pguid_mod_t ) + rs->sr_entry->e_nname.bv_len + 1 + a->a_vals[0].bv_len + 1;
+		mod = op->o_tmpalloc( len, op->o_tmpmemctx );
+		mod->ndn.bv_len = rs->sr_entry->e_nname.bv_len;
+		mod->ndn.bv_val = (char *)&mod[1];
+		mod->pguid.bv_len = a->a_vals[0].bv_len;
+		mod->pguid.bv_val = (char *)&mod->ndn.bv_val[mod->ndn.bv_len + 1];
+		lutil_strncopy( mod->ndn.bv_val, rs->sr_entry->e_nname.bv_val, rs->sr_entry->e_nname.bv_len );
+		lutil_strncopy( mod->pguid.bv_val, a->a_vals[0].bv_val, a->a_vals[0].bv_len );
+
+		mod->next = pcb->mods;
+		pcb->mods = mod;
+
+		Debug( LDAP_DEBUG_TRACE, "%s: pguid_repair_cb: scheduling entry DN=\"%s\" for repair\n",
+			op->o_log_prefix, rs->sr_entry->e_name.bv_val, 0 );
+	}
+
+	if ( e != NULL ) {
+		(void)overlay_entry_release_ov( op, e, 0, pcb->on );
+	}
+
+	return 0;
+}
+
+static int
+pguid_repair( BackendDB *be )
+{
+	slap_overinst *on = (slap_overinst *)be->bd_info;
+	void *ctx = ldap_pvt_thread_pool_context();
+	Connection conn = { 0 };
+	OperationBuffer opbuf;
+	Operation *op;
+	slap_callback sc = { 0 };
+	pguid_repair_cb_t pcb = { 0 };
+	SlapReply rs = { REP_RESULT };
+	pguid_mod_t *pmod;
+	int nrepaired = 0;
+
+	connection_fake_init2( &conn, &opbuf, ctx, 0 );
+	op = &opbuf.ob_op;
+
+	op->o_tag = LDAP_REQ_SEARCH;
+	memset( &op->oq_search, 0, sizeof( op->oq_search ) );
+
+	op->o_bd = select_backend( &be->be_nsuffix[ 0 ], 0 );
+
+	op->o_req_dn = op->o_bd->be_suffix[ 0 ];
+	op->o_req_ndn = op->o_bd->be_nsuffix[ 0 ];
+
+	op->o_dn = op->o_bd->be_rootdn;
+	op->o_ndn = op->o_bd->be_rootndn;
+
+	op->ors_scope = LDAP_SCOPE_SUBORDINATE;
+	op->ors_tlimit = SLAP_NO_LIMIT;
+	op->ors_slimit = SLAP_NO_LIMIT;
+	op->ors_attrs = slap_anlist_no_attrs;
+
+	op->ors_filterstr.bv_len = STRLENOF( "(!(=*))" ) + ad_parentUUID->ad_cname.bv_len;
+	op->ors_filterstr.bv_val = op->o_tmpalloc( op->ors_filterstr.bv_len + 1, op->o_tmpmemctx );
+	snprintf( op->ors_filterstr.bv_val, op->ors_filterstr.bv_len + 1,
+		"(!(%s=*))", ad_parentUUID->ad_cname.bv_val );
+
+	op->ors_filter = str2filter_x( op, op->ors_filterstr.bv_val );
+	if ( op->ors_filter == NULL ) {
+		rs.sr_err = LDAP_OTHER;
+		goto done_search;
+	}
+	
+	op->o_callback = &sc;
+	sc.sc_response = pguid_repair_cb;
+	sc.sc_private = &pcb;
+	pcb.on = on;
+
+	(void)op->o_bd->bd_info->bi_op_search( op, &rs );
+
+	op->o_tag = LDAP_REQ_MODIFY;
+	sc.sc_response = slap_null_cb;
+	sc.sc_private = NULL;
+	memset( &op->oq_modify, 0, sizeof( req_modify_s ) );
+
+	for ( pmod = pcb.mods; pmod != NULL; ) {
+		pguid_mod_t *pnext;
+
+		Modifications *mod;
+		SlapReply rs2 = { REP_RESULT };
+
+		mod = (Modifications *) ch_malloc( sizeof( Modifications ) );
+		mod->sml_flags = SLAP_MOD_INTERNAL;
+		mod->sml_op = LDAP_MOD_REPLACE;
+		mod->sml_desc = ad_parentUUID;
+		mod->sml_type = ad_parentUUID->ad_cname;
+		mod->sml_values = ch_malloc( sizeof( struct berval ) * 2 );
+		mod->sml_nvalues = NULL;
+		mod->sml_numvals = 1;
+		mod->sml_next = NULL;
+
+		ber_dupbv( &mod->sml_values[0], &pmod->pguid );
+		BER_BVZERO( &mod->sml_values[1] );
+
+		op->o_req_dn = pmod->ndn;
+		op->o_req_ndn = pmod->ndn;
+
+		op->orm_modlist = mod;
+		op->o_bd->be_modify( op, &rs2 );
+		slap_mods_free( op->orm_modlist, 1 );
+		if ( rs2.sr_err == LDAP_SUCCESS ) {
+			Debug( LDAP_DEBUG_TRACE, "%s: pguid_repair: entry DN=\"%s\" repaired\n",
+				op->o_log_prefix, pmod->ndn.bv_val, 0 );
+			nrepaired++;
+
+		} else {
+			Debug( LDAP_DEBUG_ANY, "%s: pguid_repair: entry DN=\"%s\" repair failed (%d)\n",
+				op->o_log_prefix, pmod->ndn.bv_val, rs2.sr_err );
+		}
+
+		pnext = pmod->next;
+		op->o_tmpfree( pmod, op->o_tmpmemctx );
+		pmod = pnext;
+	}
+
+done_search:;
+	op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
+	filter_free_x( op, op->ors_filter, 1 );
+
+	Log1( LDAP_DEBUG_STATS, LDAP_LEVEL_INFO,
+		"pguid: repaired=%d\n", nrepaired );
+
+	return rs.sr_err;
+}
+
+/* search all entries without parentUUID; "repair" them */
+static int
+pguid_db_open(
+	BackendDB	*be,
+	ConfigReply	*cr )
+{
+	if ( SLAP_SINGLE_SHADOW( be ) ) {
+		Log1( LDAP_DEBUG_ANY, LDAP_LEVEL_ERR,
+			"pguid incompatible with shadow database \"%s\".\n",
+			be->be_suffix[ 0 ].bv_val );
+		return 1;
+	}
+
+	pguid_repair( be );
+
+	return 0;
+}
+
+static struct {
+	char	*desc;
+	AttributeDescription **adp;
+} as[] = {
+	{ "( 1.3.6.1.4.1.4203.666.1.59 "
+		"NAME 'parentUUID' "
+		"DESC 'the value of the entryUUID of the parent' "
+		"EQUALITY UUIDMatch "
+		"ORDERING UUIDOrderingMatch "
+		"SYNTAX 1.3.6.1.1.16.1 "
+		"USAGE dSAOperation "
+		"SINGLE-VALUE "
+		"NO-USER-MODIFICATION " 
+		")",
+		&ad_parentUUID },
+	{ NULL }
+};
+
+int
+pguid_initialize(void)
+{
+	int code, i;
+
+	for ( i = 0; as[ i ].desc != NULL; i++ ) {
+		code = register_at( as[ i ].desc, as[ i ].adp, 0 );
+		if ( code ) {
+			Debug( LDAP_DEBUG_ANY,
+				"pguid_initialize: register_at #%d failed\n",
+				i, 0, 0 );
+			return code;
+		}
+
+		/* Allow Manager to set these as needed */
+		if ( is_at_no_user_mod( (*as[ i ].adp)->ad_type ) ) {
+			(*as[ i ].adp)->ad_type->sat_flags |=
+				SLAP_AT_MANAGEABLE;
+		}
+	}
+
+	pguid.on_bi.bi_type = "pguid";
+
+	pguid.on_bi.bi_op_add = pguid_op_add;
+	pguid.on_bi.bi_op_modrdn = pguid_op_rename;
+
+	pguid.on_bi.bi_db_init = pguid_db_init;
+	pguid.on_bi.bi_db_open = pguid_db_open;
+
+	return overlay_register( &pguid );
+}
+
+#if SLAPD_OVER_PGUID == SLAPD_MOD_DYNAMIC
+int
+init_module( int argc, char *argv[] )
+{
+	return pguid_initialize();
+}
+#endif /* SLAPD_OVER_PGUID == SLAPD_MOD_DYNAMIC */
+
+#endif /* SLAPD_OVER_PGUID */