193 DBMS_XDBZ

The DBMS_XDBZ package controls the Oracle XML DB repository security, which is based on Access Control Lists (ACLs).

This chapter contains the following topics:

193.1 DBMS_XDBZ Security Model

Owned by XDB, the DBMS_XDBZ package must be created by SYS or XDB. The EXECUTE privilege is granted to PUBLIC. Subprograms in this package are executed using the privileges of the current user.

193.2 DBMS_XDBZ Constants

The DBMS_XDBZ package defines several constants that can be used for specifying parameter values.

The package uses the constants shown in following tables.

Table 193-1 DBMS_XDBZ Constants - Name Format

Constant Type Value Description

NAME_FORMAT_SHORT

PLS_INTEGER

1

DB user name or LDAP nickname

NAME_FORMAT_DISTINGUISHED

PLS_INTEGER

2

LDAP distinguished name

Table 193-2 DBMS_XDBZ Constants - Enable Option

Constant Type Value Description

ENABLE_CONTENTS

PLS_INTEGER

1

Enables hierarchy for contents and is used by users when calling the ENABLE_HIERARCHY Procedure

ENABLE_RESMETADATA

PLS_INTEGER

2

Enables hierarchy for resource metadata, that is, this table will store schema based custom metadata for resources

Table 193-3 DBMS_XDBZ Constants - Enable Option Exercised

Constant Type Value Description

IS_ENABLED_CONTENTS

PLS_INTEGER

1

If hierarchy was enabled for contents, that is, the ENABLE_HIERARCHY Procedure was called with hierarchy_type as ENABLE_CONTENTS

IS_ENABLED_RESMETADATA

PLS_INTEGER

2

If hierarchy was enabled for resource metadata, that is, the ENABLE_HIERARCHY Procedure was called with hierarchy_type as ENABLE_RESMETADATA

193.3 Summary of DBMS_XDBZ Subprograms

This table lists the DBMS_XDBZ subprograms and briefly describes them.

Table 193-4 DBMS_XDBZ Package Subprograms

Method Description

DISABLE_HIERARCHY Procedure

Disables repository support for the specified XMLTYPE table or view

ENABLE_HIERARCHY Procedure

Enables repository support for the specified XMLType table or view

GET_ACLOID Function

Retrieves the ACL Object ID for the specified resource

GET_USERID Function

Retrieves the user ID for the specified user

IS_HIERARCHY_ENABLED Function

Determines if repository support for the specified XMLType table or view is enabled

PURGELDAPCACHE Function

Purges the LDAP nickname cache

193.3.1 CREATENONCEKEY Procedure

This procedure generates a nonce value for use in digest authentication.

Syntax

DBMS_XDBZ.CREATENONCEKEY;

193.3.2 DISABLE_HIERARCHY Procedure

This procedure disables repository support for a particular XMLType table or view.

Syntax

DBMS_XDBZ.DISABLE_HIERARCHY(
   object_schema IN VARCHAR2,
   object_name   IN VARCHAR2);

Parameters

Table 193-5 DISABLE_HIERARCHY Procedure Parameters

Parameter Description

object_schema

Schema name of the XMLType table or view

object_name

Name of the XMLType table or view

193.3.3 ENABLE_HIERARCHY Procedure

This procedure enables repository support for a particular XMLType table or view. This allows the use of a uniform ACL-based security model across all documents in the repository.

See Also:

Oracle XML DB Developer's Guide for more information about

Syntax

DBMS_XDBZ.ENABLE_HIERARCHY(
   object_schema   IN   VARCHAR2,
   object_name     IN   VARCHAR2,
   hierarchy_type  IN   PLS_INTEGER := DBMS_XDBZ.ENABLE_CONTENTS);

Parameters

Table 193-6 ENABLE_HIERARCHY Procedure Parameters

Parameter Description

object_schema

Schema name of the XMLType table or view

object_name

Name of the XMLType table or view

hierarchy_type

How to enable the hierarchy.

  • ENABLE_CONTENTS - enable hierarchy for contents, that is, this table will store contents of resources in the repository

  • ENABLE_RESMETADATA - enable hierarchy for resource metadata, that is, this table will store schema based custom metadata for resources

If this subprogram is called on a table, another call will have no effect. Note that you cannot enable hierarchy for both contents and resource metadata.

193.3.4 GET_ACLOID Function

This function retrieves the ACL Object ID for the specified resource, if the repository path is known.

Syntax

DBMS_XDBZ.GET_ACLOID(
   aclpath   IN   VARCHAR2,
   acloid    OUT  RAW)
 RETURN BOOLEAN;

Parameters

Table 193-7 GET_ACLOID Function Parameters

Parameter Description

aclpath

ACL resource path for the repository

acloid

Returned Object ID

Return Values

Returns TRUE if successful.

193.3.5 GET_USERID Function

This function retrieves the user ID for the specified user name. The local database is searched first, and if found, the USERID is returned in 4-byte database format. Otherwise, the LDAP directory is searched, if available, and if found, the USERID is returned in 4-byte database format.

Syntax

DBMS_XDBZ.GET_USERID(
   username IN  VARCHAR2,
   userid   OUT RAW,
   format   IN  BINARY_INTEGER := NAME_FORMAT_SHORT)
 RETURN BOOLEAN;

Parameters

Table 193-8 GET_USERID Function Parameters

Parameter Description

username

Name of the database or LDAP user.

userid

Return parameter for the matching user id.

format

Format of the specified user name; valid options are:

  • DBMS_XDBZ.NAME_FORMAT_SHORT (default) -- DB user name or LDAP nickname

  • DBMS_XDBZ.NAME_FORMAT_DISTINGUISHIED -- LDAP distinguished name.

Return Values

Returns TRUE if successful.

193.3.6 IS_HIERARCHY_ENABLED Function

This function determines if repository support for the specified XMLType table or view is enabled.

Syntax

DBMS_XDBZ.IS_HIERARCHY_ENABLED(
   object_schema   IN  VARCHAR2,
   object_name     IN  VARCHAR2,
   hierarchy_type  IN  PLS_INTEGER := IS_ENABLED_CONTENTS)
 RETURN BOOLEAN;

Parameters

Table 193-9 IS_HIERARCHY_ENABLED Function Parameters

Parameter Description

object_schema

Schema name of the XMLType table or view

object_name

Name of the XMLType table or view

hierarchy_type

Type of hierarchy to check for:

  • IS_ENABLED_CONTENTS - if hierarchy was enabled for contents, that is, the ENABLE_HIERARCHY Procedure was called with hierarchy_type as ENABLE_CONTENTS

  • IS_ENABLED_RESMETADATA - if hierarchy was enabled for resource metadata, that is, the ENABLE_HIERARCHY Procedure was called with hierarchy_type as ENABLE_RESMETADATA

Return Values

Returns TRUE if the given XMLTYPE table or view has the XDB Hierarchy enabled with the specified type.

193.3.7 PURGELDAPCACHE Function

This function purges the LDAP nickname cache.

It returns TRUE if successful.

Syntax

DBMS_XDBZ.PURGELDAPCACHE
 RETURN BOOLEAN;