1 files changed, 637 insertions, 0 deletions

diff --git a/servers/slapd/back-sql/delete.c b/servers/slapd/back-sql/delete.c
new file mode 100644
index 0000000..78c632d
--- /dev/null
+++ b/servers/slapd/back-sql/delete.c
@@ -0,0 +1,637 @@
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1999-2021 The OpenLDAP Foundation.
+ * Portions Copyright 1999 Dmitry Kovalev.
+ * Portions Copyright 2002 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 Dmitry Kovalev for inclusion
+ * by OpenLDAP Software.  Additional significant contributors include
+ * Pierangelo Masarati.
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+#include <sys/types.h>
+#include "ac/string.h"
+
+#include "slap.h"
+#include "proto-sql.h"
+
+typedef struct backsql_delete_attr_t {
+	Operation 		*op;
+	SlapReply		*rs;
+	SQLHDBC			dbh; 
+	backsql_entryID		*e_id;
+} backsql_delete_attr_t;
+
+static int
+backsql_delete_attr_f( void *v_at, void *v_bda )
+{
+	backsql_at_map_rec	*at = (backsql_at_map_rec *)v_at;
+	backsql_delete_attr_t	*bda = (backsql_delete_attr_t *)v_bda;
+	int			rc;
+
+	rc = backsql_modify_delete_all_values( bda->op,
+			bda->rs, bda->dbh, bda->e_id, at );
+
+	if ( rc != LDAP_SUCCESS ) {
+		return BACKSQL_AVL_STOP;
+	}
+
+	return BACKSQL_AVL_CONTINUE;
+}
+
+static int
+backsql_delete_all_attrs(
+	Operation 		*op,
+	SlapReply		*rs,
+	SQLHDBC			dbh, 
+	backsql_entryID		*eid )
+{
+	backsql_delete_attr_t	bda;
+	int			rc;
+
+	bda.op = op;
+	bda.rs = rs;
+	bda.dbh = dbh;
+	bda.e_id = eid;
+	
+	rc = avl_apply( eid->eid_oc->bom_attrs, backsql_delete_attr_f, &bda,
+			BACKSQL_AVL_STOP, AVL_INORDER );
+	if ( rc == BACKSQL_AVL_STOP ) {
+		return rs->sr_err;
+	}
+
+	return LDAP_SUCCESS;
+}
+
+static int
+backsql_delete_int(
+	Operation	*op,
+	SlapReply	*rs,
+	SQLHDBC		dbh,
+	SQLHSTMT	*sthp,
+	backsql_entryID	*eid,
+	Entry		**ep )
+{
+	backsql_info 		*bi = (backsql_info*)op->o_bd->be_private;
+	SQLHSTMT		sth = SQL_NULL_HSTMT;
+	RETCODE			rc;
+	int			prc = LDAP_SUCCESS;
+	/* first parameter no */
+	SQLUSMALLINT		pno = 0;
+
+	sth = *sthp;
+
+	/* avl_apply ... */
+	rs->sr_err = backsql_delete_all_attrs( op, rs, dbh, eid );
+	if ( rs->sr_err != LDAP_SUCCESS ) {
+		goto done;
+	}
+
+	rc = backsql_Prepare( dbh, &sth, eid->eid_oc->bom_delete_proc, 0 );
+	if ( rc != SQL_SUCCESS ) {
+		Debug( LDAP_DEBUG_TRACE,
+			"   backsql_delete(): "
+			"error preparing delete query\n", 
+			0, 0, 0 );
+		backsql_PrintErrors( bi->sql_db_env, dbh, sth, rc );
+
+		rs->sr_err = LDAP_OTHER;
+		rs->sr_text = "SQL-backend error";
+		*ep = NULL;
+		goto done;
+	}
+
+	if ( BACKSQL_IS_DEL( eid->eid_oc->bom_expect_return ) ) {
+		pno = 1;
+		rc = backsql_BindParamInt( sth, 1, SQL_PARAM_OUTPUT, &prc );
+		if ( rc != SQL_SUCCESS ) {
+			Debug( LDAP_DEBUG_TRACE,
+				"   backsql_delete(): "
+				"error binding output parameter for objectClass %s\n",
+				eid->eid_oc->bom_oc->soc_cname.bv_val, 0, 0 );
+			backsql_PrintErrors( bi->sql_db_env, dbh, 
+				sth, rc );
+			SQLFreeStmt( sth, SQL_DROP );
+
+			rs->sr_text = "SQL-backend error";
+			rs->sr_err = LDAP_OTHER;
+			*ep = NULL;
+			goto done;
+		}
+	}
+
+	rc = backsql_BindParamID( sth, pno + 1, SQL_PARAM_INPUT, &eid->eid_keyval );
+	if ( rc != SQL_SUCCESS ) {
+		Debug( LDAP_DEBUG_TRACE,
+			"   backsql_delete(): "
+			"error binding keyval parameter for objectClass %s\n",
+			eid->eid_oc->bom_oc->soc_cname.bv_val, 0, 0 );
+		backsql_PrintErrors( bi->sql_db_env, dbh, 
+			sth, rc );
+		SQLFreeStmt( sth, SQL_DROP );
+
+		rs->sr_text = "SQL-backend error";
+		rs->sr_err = LDAP_OTHER;
+		*ep = NULL;
+		goto done;
+	}
+
+	rc = SQLExecute( sth );
+	if ( rc == SQL_SUCCESS && prc == LDAP_SUCCESS ) {
+		rs->sr_err = LDAP_SUCCESS;
+
+	} else {
+		Debug( LDAP_DEBUG_TRACE, "   backsql_delete(): "
+			"delete_proc execution failed (rc=%d, prc=%d)\n",
+			rc, prc, 0 );
+
+
+		if ( prc != LDAP_SUCCESS ) {
+			/* SQL procedure executed fine 
+			 * but returned an error */
+			rs->sr_err = BACKSQL_SANITIZE_ERROR( prc );
+
+		} else {
+			backsql_PrintErrors( bi->sql_db_env, dbh,
+					sth, rc );
+			rs->sr_err = LDAP_OTHER;
+		}
+		SQLFreeStmt( sth, SQL_DROP );
+		goto done;
+	}
+	SQLFreeStmt( sth, SQL_DROP );
+
+	/* delete "auxiliary" objectClasses, if any... */
+	rc = backsql_Prepare( dbh, &sth, bi->sql_delobjclasses_stmt, 0 );
+	if ( rc != SQL_SUCCESS ) {
+		Debug( LDAP_DEBUG_TRACE,
+			"   backsql_delete(): "
+			"error preparing ldap_entry_objclasses delete query\n", 
+			0, 0, 0 );
+		backsql_PrintErrors( bi->sql_db_env, dbh, sth, rc );
+
+		rs->sr_err = LDAP_OTHER;
+		rs->sr_text = "SQL-backend error";
+		*ep = NULL;
+		goto done;
+	}
+
+	rc = backsql_BindParamID( sth, 1, SQL_PARAM_INPUT, &eid->eid_id );
+	if ( rc != SQL_SUCCESS ) {
+		Debug( LDAP_DEBUG_TRACE,
+			"   backsql_delete(): "
+			"error binding auxiliary objectClasses "
+			"entry ID parameter for objectClass %s\n",
+			eid->eid_oc->bom_oc->soc_cname.bv_val, 0, 0 );
+		backsql_PrintErrors( bi->sql_db_env, dbh, 
+			sth, rc );
+		SQLFreeStmt( sth, SQL_DROP );
+
+		rs->sr_text = "SQL-backend error";
+		rs->sr_err = LDAP_OTHER;
+		*ep = NULL;
+		goto done;
+	}
+
+	rc = SQLExecute( sth );
+	switch ( rc ) {
+	case SQL_NO_DATA:
+		/* apparently there were no "auxiliary" objectClasses
+		 * for this entry... */
+	case SQL_SUCCESS:
+		break;
+
+	default:
+		Debug( LDAP_DEBUG_TRACE, "   backsql_delete(): "
+			"failed to delete record from ldap_entry_objclasses\n", 
+			0, 0, 0 );
+		backsql_PrintErrors( bi->sql_db_env, dbh, sth, rc );
+		SQLFreeStmt( sth, SQL_DROP );
+		rs->sr_err = LDAP_OTHER;
+		rs->sr_text = "SQL-backend error";
+		*ep = NULL;
+		goto done;
+	}
+	SQLFreeStmt( sth, SQL_DROP );
+
+	/* delete entry... */
+	rc = backsql_Prepare( dbh, &sth, bi->sql_delentry_stmt, 0 );
+	if ( rc != SQL_SUCCESS ) {
+		Debug( LDAP_DEBUG_TRACE,
+			"   backsql_delete(): "
+			"error preparing ldap_entries delete query\n", 
+			0, 0, 0 );
+		backsql_PrintErrors( bi->sql_db_env, dbh, sth, rc );
+
+		rs->sr_err = LDAP_OTHER;
+		rs->sr_text = "SQL-backend error";
+		*ep = NULL;
+		goto done;
+	}
+
+	rc = backsql_BindParamID( sth, 1, SQL_PARAM_INPUT, &eid->eid_id );
+	if ( rc != SQL_SUCCESS ) {
+		Debug( LDAP_DEBUG_TRACE,
+			"   backsql_delete(): "
+			"error binding entry ID parameter "
+			"for objectClass %s\n",
+			eid->eid_oc->bom_oc->soc_cname.bv_val, 0, 0 );
+		backsql_PrintErrors( bi->sql_db_env, dbh, 
+			sth, rc );
+		SQLFreeStmt( sth, SQL_DROP );
+
+		rs->sr_text = "SQL-backend error";
+		rs->sr_err = LDAP_OTHER;
+		*ep = NULL;
+		goto done;
+	}
+
+	rc = SQLExecute( sth );
+	if ( rc != SQL_SUCCESS ) {
+		Debug( LDAP_DEBUG_TRACE, "   backsql_delete(): "
+			"failed to delete record from ldap_entries\n", 
+			0, 0, 0 );
+		backsql_PrintErrors( bi->sql_db_env, dbh, sth, rc );
+		SQLFreeStmt( sth, SQL_DROP );
+		rs->sr_err = LDAP_OTHER;
+		rs->sr_text = "SQL-backend error";
+		*ep = NULL;
+		goto done;
+	}
+	SQLFreeStmt( sth, SQL_DROP );
+
+	rs->sr_err = LDAP_SUCCESS;
+	*ep = NULL;
+
+done:;
+	*sthp = sth;
+
+	return rs->sr_err;
+}
+
+typedef struct backsql_tree_delete_t {
+	Operation	*btd_op;
+	int		btd_rc;
+	backsql_entryID	*btd_eid;
+} backsql_tree_delete_t;
+
+static int
+backsql_tree_delete_search_cb( Operation *op, SlapReply *rs )
+{
+	if ( rs->sr_type == REP_SEARCH ) {
+		backsql_tree_delete_t	*btd;
+		backsql_entryID		*eid;
+
+		btd = (backsql_tree_delete_t *)op->o_callback->sc_private;
+
+		if ( !access_allowed( btd->btd_op, rs->sr_entry,
+			slap_schema.si_ad_entry, NULL, ACL_WDEL, NULL )
+			|| !access_allowed( btd->btd_op, rs->sr_entry,
+			slap_schema.si_ad_children, NULL, ACL_WDEL, NULL ) )
+		{
+			btd->btd_rc = LDAP_INSUFFICIENT_ACCESS;
+			return rs->sr_err = LDAP_UNAVAILABLE;
+		}
+
+		assert( rs->sr_entry != NULL );
+		assert( rs->sr_entry->e_private != NULL );
+
+		eid = (backsql_entryID *)rs->sr_entry->e_private;
+		assert( eid->eid_oc != NULL );
+		if ( eid->eid_oc == NULL || eid->eid_oc->bom_delete_proc == NULL ) {
+			btd->btd_rc = LDAP_UNWILLING_TO_PERFORM;
+			return rs->sr_err = LDAP_UNAVAILABLE;
+		}
+
+		eid = backsql_entryID_dup( eid, op->o_tmpmemctx );
+		eid->eid_next = btd->btd_eid;
+		btd->btd_eid = eid;
+	}
+
+	return 0;
+}
+
+static int
+backsql_tree_delete(
+	Operation	*op,
+	SlapReply	*rs,
+	SQLHDBC		dbh,
+	SQLHSTMT	*sthp )
+{
+	Operation		op2 = *op;
+	slap_callback		sc = { 0 };
+	SlapReply		rs2 = { REP_RESULT };
+	backsql_tree_delete_t	btd = { 0 };
+
+	int			rc;
+
+	/*
+	 * - perform an internal subtree search as the rootdn
+	 * - for each entry
+	 *	- check access
+	 *	- check objectClass and delete method(s)
+	 * - for each entry
+	 *	- delete
+	 * - if successful, commit
+	 */
+
+	op2.o_tag = LDAP_REQ_SEARCH;
+	op2.o_protocol = LDAP_VERSION3;
+
+	btd.btd_op = op;
+	sc.sc_private = &btd;
+	sc.sc_response = backsql_tree_delete_search_cb;
+	op2.o_callback = &sc;
+
+	op2.o_dn = op->o_bd->be_rootdn;
+	op2.o_ndn = op->o_bd->be_rootndn;
+
+	op2.o_managedsait = SLAP_CONTROL_CRITICAL;
+
+	op2.ors_scope = LDAP_SCOPE_SUBTREE;
+	op2.ors_deref = LDAP_DEREF_NEVER;
+	op2.ors_slimit = SLAP_NO_LIMIT;
+	op2.ors_tlimit = SLAP_NO_LIMIT;
+	op2.ors_filter = (Filter *)slap_filter_objectClass_pres;
+	op2.ors_filterstr = *slap_filterstr_objectClass_pres;
+	op2.ors_attrs = slap_anlist_all_attributes;
+	op2.ors_attrsonly = 0;
+
+	rc = op->o_bd->be_search( &op2, &rs2 );
+	if ( rc != LDAP_SUCCESS ) {
+		rc = rs->sr_err = btd.btd_rc;
+		rs->sr_text = "subtree delete not possible";
+		send_ldap_result( op, rs );
+		goto clean;
+	}
+
+	for ( ; btd.btd_eid != NULL;
+		btd.btd_eid = backsql_free_entryID( btd.btd_eid,
+			1, op->o_tmpmemctx ) )
+	{
+		Entry	*e = (void *)0xbad;
+		rc = backsql_delete_int( op, rs, dbh, sthp, btd.btd_eid, &e );
+		if ( rc != LDAP_SUCCESS ) {
+			break;
+		}
+	}
+
+clean:;
+	for ( ; btd.btd_eid != NULL;
+		btd.btd_eid = backsql_free_entryID( btd.btd_eid,
+			1, op->o_tmpmemctx ) )
+		;
+
+	return rc;
+}
+
+int
+backsql_delete( Operation *op, SlapReply *rs )
+{
+	SQLHDBC 		dbh = SQL_NULL_HDBC;
+	SQLHSTMT		sth = SQL_NULL_HSTMT;
+	backsql_oc_map_rec	*oc = NULL;
+	backsql_srch_info	bsi = { 0 };
+	backsql_entryID		e_id = { 0 };
+	Entry			d = { 0 }, p = { 0 }, *e = NULL;
+	struct berval		pdn = BER_BVNULL;
+	int			manageDSAit = get_manageDSAit( op );
+
+	Debug( LDAP_DEBUG_TRACE, "==>backsql_delete(): deleting entry \"%s\"\n",
+			op->o_req_ndn.bv_val, 0, 0 );
+
+	rs->sr_err = backsql_get_db_conn( op, &dbh );
+	if ( rs->sr_err != LDAP_SUCCESS ) {
+		Debug( LDAP_DEBUG_TRACE, "   backsql_delete(): "
+			"could not get connection handle - exiting\n", 
+			0, 0, 0 );
+		rs->sr_text = ( rs->sr_err == LDAP_OTHER )
+			? "SQL-backend error" : NULL;
+		e = NULL;
+		goto done;
+	}
+
+	/*
+	 * Get the entry
+	 */
+	bsi.bsi_e = &d;
+	rs->sr_err = backsql_init_search( &bsi, &op->o_req_ndn,
+			LDAP_SCOPE_BASE, 
+			(time_t)(-1), NULL, dbh, op, rs, slap_anlist_no_attrs,
+			( BACKSQL_ISF_MATCHED | BACKSQL_ISF_GET_ENTRY | BACKSQL_ISF_GET_OC ) );
+	switch ( rs->sr_err ) {
+	case LDAP_SUCCESS:
+		break;
+
+	case LDAP_REFERRAL:
+		if ( manageDSAit && !BER_BVISNULL( &bsi.bsi_e->e_nname ) &&
+				dn_match( &op->o_req_ndn, &bsi.bsi_e->e_nname ) )
+		{
+			rs->sr_err = LDAP_SUCCESS;
+			rs->sr_text = NULL;
+			rs->sr_matched = NULL;
+			if ( rs->sr_ref ) {
+				ber_bvarray_free( rs->sr_ref );
+				rs->sr_ref = NULL;
+			}
+			break;
+		}
+		e = &d;
+		/* fallthru */
+
+	default:
+		Debug( LDAP_DEBUG_TRACE, "backsql_delete(): "
+			"could not retrieve deleteDN ID - no such entry\n", 
+			0, 0, 0 );
+		if ( !BER_BVISNULL( &d.e_nname ) ) {
+			/* FIXME: should always be true! */
+			e = &d;
+
+		} else {
+			e = NULL;
+		}
+		goto done;
+	}
+
+	if ( get_assert( op ) &&
+			( test_filter( op, &d, get_assertion( op ) )
+			  != LDAP_COMPARE_TRUE ) )
+	{
+		rs->sr_err = LDAP_ASSERTION_FAILED;
+		e = &d;
+		goto done;
+	}
+
+	if ( !access_allowed( op, &d, slap_schema.si_ad_entry, 
+			NULL, ACL_WDEL, NULL ) )
+	{
+		Debug( LDAP_DEBUG_TRACE, "   backsql_delete(): "
+			"no write access to entry\n", 
+			0, 0, 0 );
+		rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
+		e = &d;
+		goto done;
+	}
+
+	rs->sr_err = backsql_has_children( op, dbh, &op->o_req_ndn );
+	switch ( rs->sr_err ) {
+	case LDAP_COMPARE_FALSE:
+		rs->sr_err = LDAP_SUCCESS;
+		break;
+
+	case LDAP_COMPARE_TRUE:
+#ifdef SLAP_CONTROL_X_TREE_DELETE
+		if ( get_treeDelete( op ) ) {
+			rs->sr_err = LDAP_SUCCESS;
+			break;
+		}
+#endif /* SLAP_CONTROL_X_TREE_DELETE */
+
+		Debug( LDAP_DEBUG_TRACE, "   backsql_delete(): "
+			"entry \"%s\" has children\n",
+			op->o_req_dn.bv_val, 0, 0 );
+		rs->sr_err = LDAP_NOT_ALLOWED_ON_NONLEAF;
+		rs->sr_text = "subordinate objects must be deleted first";
+		/* fallthru */
+
+	default:
+		e = &d;
+		goto done;
+	}
+
+	assert( bsi.bsi_base_id.eid_oc != NULL );
+	oc = bsi.bsi_base_id.eid_oc;
+	if ( oc->bom_delete_proc == NULL ) {
+		Debug( LDAP_DEBUG_TRACE, "   backsql_delete(): "
+			"delete procedure is not defined "
+			"for this objectclass - aborting\n", 0, 0, 0 );
+		rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
+		rs->sr_text = "operation not permitted within namingContext";
+		e = NULL;
+		goto done;
+	}
+
+	/*
+	 * Get the parent
+	 */
+	e_id = bsi.bsi_base_id;
+	memset( &bsi.bsi_base_id, 0, sizeof( bsi.bsi_base_id ) );
+	if ( !be_issuffix( op->o_bd, &op->o_req_ndn ) ) {
+		dnParent( &op->o_req_ndn, &pdn );
+		bsi.bsi_e = &p;
+		rs->sr_err = backsql_init_search( &bsi, &pdn,
+				LDAP_SCOPE_BASE, 
+				(time_t)(-1), NULL, dbh, op, rs,
+				slap_anlist_no_attrs,
+				BACKSQL_ISF_GET_ENTRY );
+		if ( rs->sr_err != LDAP_SUCCESS ) {
+			Debug( LDAP_DEBUG_TRACE, "backsql_delete(): "
+				"could not retrieve deleteDN ID "
+				"- no such entry\n", 
+				0, 0, 0 );
+			e = &p;
+			goto done;
+		}
+
+		(void)backsql_free_entryID( &bsi.bsi_base_id, 0, op->o_tmpmemctx );
+
+		/* check parent for "children" acl */
+		if ( !access_allowed( op, &p, slap_schema.si_ad_children, 
+				NULL, ACL_WDEL, NULL ) )
+		{
+			Debug( LDAP_DEBUG_TRACE, "   backsql_delete(): "
+				"no write access to parent\n", 
+				0, 0, 0 );
+			rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
+			e = &p;
+			goto done;
+
+		}
+	}
+
+	e = &d;
+#ifdef SLAP_CONTROL_X_TREE_DELETE
+	if ( get_treeDelete( op ) ) {
+		backsql_tree_delete( op, rs, dbh, &sth );
+		if ( rs->sr_err == LDAP_OTHER || rs->sr_err == LDAP_SUCCESS )
+		{
+			e = NULL;
+		}
+
+	} else
+#endif /* SLAP_CONTROL_X_TREE_DELETE */
+	{
+		backsql_delete_int( op, rs, dbh, &sth, &e_id, &e );
+	}
+
+	/*
+	 * Commit only if all operations succeed
+	 */
+	if ( sth != SQL_NULL_HSTMT ) {
+		SQLUSMALLINT	CompletionType = SQL_ROLLBACK;
+	
+		if ( rs->sr_err == LDAP_SUCCESS && !op->o_noop ) {
+			assert( e == NULL );
+			CompletionType = SQL_COMMIT;
+		}
+
+		SQLTransact( SQL_NULL_HENV, dbh, CompletionType );
+	}
+
+done:;
+	if ( e != NULL ) {
+		if ( !access_allowed( op, e, slap_schema.si_ad_entry, NULL,
+					ACL_DISCLOSE, NULL ) )
+		{
+			rs->sr_err = LDAP_NO_SUCH_OBJECT;
+			rs->sr_text = NULL;
+			rs->sr_matched = NULL;
+			if ( rs->sr_ref ) {
+				ber_bvarray_free( rs->sr_ref );
+				rs->sr_ref = NULL;
+			}
+		}
+	}
+
+	if ( op->o_noop && rs->sr_err == LDAP_SUCCESS ) {
+		rs->sr_err = LDAP_X_NO_OPERATION;
+	}
+
+	send_ldap_result( op, rs );
+
+	Debug( LDAP_DEBUG_TRACE, "<==backsql_delete()\n", 0, 0, 0 );
+
+	if ( !BER_BVISNULL( &e_id.eid_ndn ) ) {
+		(void)backsql_free_entryID( &e_id, 0, op->o_tmpmemctx );
+	}
+
+	if ( !BER_BVISNULL( &d.e_nname ) ) {
+		backsql_entry_clean( op, &d );
+	}
+
+	if ( !BER_BVISNULL( &p.e_nname ) ) {
+		backsql_entry_clean( op, &p );
+	}
+
+	if ( rs->sr_ref ) {
+		ber_bvarray_free( rs->sr_ref );
+		rs->sr_ref = NULL;
+	}
+
+	return rs->sr_err;
+}
+