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Adding SRS source for LDAP role mapping.
2021-01-30 00:43:33 +00:00
# SRS-014 ClickHouse LDAP Role Mapping
# Software Requirements Specification
## Table of Contents
* 1 [Revision History](#revision-history)
* 2 [Introduction](#introduction)
* 3 [Terminology](#terminology)
* 3.1 [LDAP](#ldap)
* 4 [Requirements](#requirements)
* 4.1 [General](#general)
* 4.1.1 [RQ.SRS-014.LDAP.RoleMapping](#rqsrs-014ldaprolemapping)
* 4.1.2 [RQ.SRS-014.LDAP.RoleMapping.WithFixedRoles](#rqsrs-014ldaprolemappingwithfixedroles)
* 4.1.3 [RQ.SRS-014.LDAP.RoleMapping.Search](#rqsrs-014ldaprolemappingsearch)
* 4.2 [Mapped Role Names](#mapped-role-names)
* 4.2.1 [RQ.SRS-014.LDAP.RoleMapping.Map.Role.Name.WithUTF8Characters](#rqsrs-014ldaprolemappingmaprolenamewithutf8characters)
* 4.2.2 [RQ.SRS-014.LDAP.RoleMapping.Map.Role.Name.Long](#rqsrs-014ldaprolemappingmaprolenamelong)
* 4.2.3 [RQ.SRS-014.LDAP.RoleMapping.Map.Role.Name.WithSpecialXMLCharacters](#rqsrs-014ldaprolemappingmaprolenamewithspecialxmlcharacters)
* 4.2.4 [RQ.SRS-014.LDAP.RoleMapping.Map.Role.Name.WithSpecialRegexCharacters](#rqsrs-014ldaprolemappingmaprolenamewithspecialregexcharacters)
* 4.3 [Multiple Roles](#multiple-roles)
* 4.3.1 [RQ.SRS-014.LDAP.RoleMapping.Map.MultipleRoles](#rqsrs-014ldaprolemappingmapmultipleroles)
* 4.4 [LDAP Groups](#ldap-groups)
* 4.4.1 [RQ.SRS-014.LDAP.RoleMapping.LDAP.Group.Removed](#rqsrs-014ldaprolemappingldapgroupremoved)
* 4.4.2 [RQ.SRS-014.LDAP.RoleMapping.LDAP.Group.RemovedAndAdded.Parallel](#rqsrs-014ldaprolemappingldapgroupremovedandaddedparallel)
* 4.4.3 [RQ.SRS-014.LDAP.RoleMapping.LDAP.Group.UserRemoved](#rqsrs-014ldaprolemappingldapgroupuserremoved)
* 4.4.4 [RQ.SRS-014.LDAP.RoleMapping.LDAP.Group.UserRemovedAndAdded.Parallel](#rqsrs-014ldaprolemappingldapgroupuserremovedandaddedparallel)
* 4.5 [RBAC Roles](#rbac-roles)
* 4.5.1 [RQ.SRS-014.LDAP.RoleMapping.RBAC.Role.NotPresent](#rqsrs-014ldaprolemappingrbacrolenotpresent)
* 4.5.2 [RQ.SRS-014.LDAP.RoleMapping.RBAC.Role.Added](#rqsrs-014ldaprolemappingrbacroleadded)
* 4.5.3 [RQ.SRS-014.LDAP.RoleMapping.RBAC.Role.Removed](#rqsrs-014ldaprolemappingrbacroleremoved)
* 4.5.4 [RQ.SRS-014.LDAP.RoleMapping.RBAC.Role.Readded](#rqsrs-014ldaprolemappingrbacrolereadded)
* 4.5.5 [RQ.SRS-014.LDAP.RoleMapping.RBAC.Role.RemovedAndAdded.Parallel](#rqsrs-014ldaprolemappingrbacroleremovedandaddedparallel)
* 4.5.6 [RQ.SRS-014.LDAP.RoleMapping.RBAC.Role.New](#rqsrs-014ldaprolemappingrbacrolenew)
* 4.5.7 [RQ.SRS-014.LDAP.RoleMapping.RBAC.Role.NewPrivilege](#rqsrs-014ldaprolemappingrbacrolenewprivilege)
* 4.5.8 [RQ.SRS-014.LDAP.RoleMapping.RBAC.Role.RemovedPrivilege](#rqsrs-014ldaprolemappingrbacroleremovedprivilege)
* 4.6 [Authentication](#authentication)
* 4.6.1 [RQ.SRS-014.LDAP.RoleMapping.Authentication.Parallel](#rqsrs-014ldaprolemappingauthenticationparallel)
* 4.6.2 [RQ.SRS-014.LDAP.RoleMapping.Authentication.Parallel.ValidAndInvalid](#rqsrs-014ldaprolemappingauthenticationparallelvalidandinvalid)
* 4.6.3 [RQ.SRS-014.LDAP.RoleMapping.Authentication.Parallel.MultipleServers](#rqsrs-014ldaprolemappingauthenticationparallelmultipleservers)
* 4.6.4 [RQ.SRS-014.LDAP.RoleMapping.Authentication.Parallel.LocalOnly](#rqsrs-014ldaprolemappingauthenticationparallellocalonly)
* 4.6.5 [RQ.SRS-014.LDAP.RoleMapping.Authentication.Parallel.LocalAndMultipleLDAP](#rqsrs-014ldaprolemappingauthenticationparallellocalandmultipleldap)
* 4.6.6 [RQ.SRS-014.LDAP.RoleMapping.Authentication.Parallel.SameUser](#rqsrs-014ldaprolemappingauthenticationparallelsameuser)
* 4.7 [Server Configuration](#server-configuration)
* 4.7.1 [BindDN Parameter](#binddn-parameter)
* 4.7.1.1 [RQ.SRS-014.LDAP.RoleMapping.Configuration.Server.BindDN](#rqsrs-014ldaprolemappingconfigurationserverbinddn)
* 4.7.1.2 [RQ.SRS-014.LDAP.RoleMapping.Configuration.Server.BindDN.ConflictWith.AuthDN](#rqsrs-014ldaprolemappingconfigurationserverbinddnconflictwithauthdn)
* 4.8 [External User Directory Configuration](#external-user-directory-configuration)
* 4.8.1 [Syntax](#syntax)
* 4.8.1.1 [RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.Syntax](#rqsrs-014ldaprolemappingconfigurationuserdirectoryrolemappingsyntax)
* 4.8.2 [Special Characters Escaping](#special-characters-escaping)
* 4.8.2.1 [RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.SpecialCharactersEscaping](#rqsrs-014ldaprolemappingconfigurationuserdirectoryrolemappingspecialcharactersescaping)
* 4.8.3 [Multiple Sections](#multiple-sections)
* 4.8.3.1 [RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.MultipleSections](#rqsrs-014ldaprolemappingconfigurationuserdirectoryrolemappingmultiplesections)
* 4.8.3.2 [RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.MultipleSections.IdenticalParameters](#rqsrs-014ldaprolemappingconfigurationuserdirectoryrolemappingmultiplesectionsidenticalparameters)
* 4.8.4 [BaseDN Parameter](#basedn-parameter)
* 4.8.4.1 [RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.BaseDN](#rqsrs-014ldaprolemappingconfigurationuserdirectoryrolemappingbasedn)
* 4.8.5 [Attribute Parameter](#attribute-parameter)
* 4.8.5.1 [RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.Attribute](#rqsrs-014ldaprolemappingconfigurationuserdirectoryrolemappingattribute)
* 4.8.6 [Scope Parameter](#scope-parameter)
* 4.8.6.1 [RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.Scope](#rqsrs-014ldaprolemappingconfigurationuserdirectoryrolemappingscope)
* 4.8.6.2 [RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.Scope.Value.Base](#rqsrs-014ldaprolemappingconfigurationuserdirectoryrolemappingscopevaluebase)
* 4.8.6.3 [RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.Scope.Value.OneLevel](#rqsrs-014ldaprolemappingconfigurationuserdirectoryrolemappingscopevalueonelevel)
* 4.8.6.4 [RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.Scope.Value.Children](#rqsrs-014ldaprolemappingconfigurationuserdirectoryrolemappingscopevaluechildren)
* 4.8.6.5 [RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.Scope.Value.Subtree](#rqsrs-014ldaprolemappingconfigurationuserdirectoryrolemappingscopevaluesubtree)
* 4.8.6.6 [RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.Scope.Value.Default](#rqsrs-014ldaprolemappingconfigurationuserdirectoryrolemappingscopevaluedefault)
* 4.8.7 [Search Filter Parameter](#search-filter-parameter)
* 4.8.7.1 [RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.SearchFilter](#rqsrs-014ldaprolemappingconfigurationuserdirectoryrolemappingsearchfilter)
* 4.8.8 [Prefix Parameter](#prefix-parameter)
* 4.8.8.1 [RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.Prefix](#rqsrs-014ldaprolemappingconfigurationuserdirectoryrolemappingprefix)
* 4.8.8.2 [RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.Prefix.Default](#rqsrs-014ldaprolemappingconfigurationuserdirectoryrolemappingprefixdefault)
* 4.8.8.3 [RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.Prefix.WithUTF8Characters](#rqsrs-014ldaprolemappingconfigurationuserdirectoryrolemappingprefixwithutf8characters)
* 4.8.8.4 [RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.Prefix.WithSpecialXMLCharacters](#rqsrs-014ldaprolemappingconfigurationuserdirectoryrolemappingprefixwithspecialxmlcharacters)
* 4.8.8.5 [RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.Prefix.WithSpecialRegexCharacters](#rqsrs-014ldaprolemappingconfigurationuserdirectoryrolemappingprefixwithspecialregexcharacters)
* 5 [References](#references)
## Revision History
This document is stored in an electronic form using [Git] source control management software
hosted in a [GitHub Repository].
All the updates are tracked using the [Revision History].
## Introduction
The [SRS-007 ClickHouse Authentication of Users via LDAP] added support for authenticating
users using an [LDAP] server and the [SRS-009 ClickHouse LDAP External User Directory] added
support for authenticating users using an [LDAP] external user directory.
This requirements specification adds additional functionality for mapping [LDAP] groups to
the corresponding [ClickHouse] [RBAC] roles when [LDAP] external user directory is configured.
This functionality will enable easier access management for [LDAP] authenticated users
as the privileges granted by the roles can be granted or revoked by granting or revoking
a corresponding [LDAP] group to one or more [LDAP] users.
For the use case when only [LDAP] user authentication is used, the roles can be
managed using [RBAC] in the same way as for non-[LDAP] authenticated users.
## Terminology
### LDAP
* Lightweight Directory Access Protocol
## Requirements
### General
#### RQ.SRS-014.LDAP.RoleMapping
version: 1.0
[ClickHouse] SHALL support mapping of [LDAP] groups to [RBAC] roles
for users authenticated using [LDAP] external user directory.
#### RQ.SRS-014.LDAP.RoleMapping.WithFixedRoles
version: 1.0
[ClickHouse] SHALL support mapping of [LDAP] groups to [RBAC] roles
for users authenticated using [LDAP] external user directory when
one or more roles are specified in the `<roles>` section.
#### RQ.SRS-014.LDAP.RoleMapping.Search
version: 1.0
[ClickHouse] SHALL perform search on the [LDAP] server and map the results to [RBAC] role names
when authenticating users using the [LDAP] external user directory if the `<role_mapping>` section is configured
as part of the [LDAP] external user directory. The matched roles SHALL be assigned to the user.
### Mapped Role Names
#### RQ.SRS-014.LDAP.RoleMapping.Map.Role.Name.WithUTF8Characters
version: 1.0
[ClickHouse] SHALL support mapping [LDAP] search results for users authenticated using [LDAP] external user directory
to an [RBAC] role that contains UTF-8 characters.
#### RQ.SRS-014.LDAP.RoleMapping.Map.Role.Name.Long
version: 1.0
[ClickHouse] SHALL support mapping [LDAP] search results for users authenticated using [LDAP] external user directory
to an [RBAC] role that has a name with more than 128 characters.
#### RQ.SRS-014.LDAP.RoleMapping.Map.Role.Name.WithSpecialXMLCharacters
version: 1.0
[ClickHouse] SHALL support mapping [LDAP] search results for users authenticated using [LDAP] external user directory
to an [RBAC] role that has a name that contains special characters that need to be escaped in XML.
#### RQ.SRS-014.LDAP.RoleMapping.Map.Role.Name.WithSpecialRegexCharacters
version: 1.0
[ClickHouse] SHALL support mapping [LDAP] search results for users authenticated using [LDAP] external user directory
to an [RBAC] role that has a name that contains special characters that need to be escaped in regex.
### Multiple Roles
#### RQ.SRS-014.LDAP.RoleMapping.Map.MultipleRoles
version: 1.0
[ClickHouse] SHALL support mapping one or more [LDAP] search results for users authenticated using
[LDAP] external user directory to one or more [RBAC] role.
### LDAP Groups
#### RQ.SRS-014.LDAP.RoleMapping.LDAP.Group.Removed
version: 1.0
[ClickHouse] SHALL not assign [RBAC] role(s) for any users authenticated using [LDAP] external user directory
if the corresponding [LDAP] group(s) that map those role(s) are removed. Any users that have active sessions SHALL still
have privileges provided by the role(s) until the next time they are authenticated.
#### RQ.SRS-014.LDAP.RoleMapping.LDAP.Group.RemovedAndAdded.Parallel
version: 1.0
[ClickHouse] SHALL support authenticating users using [LDAP] external user directory
when [LDAP] groups are removed and added
at the same time as [LDAP] user authentications are performed in parallel.
#### RQ.SRS-014.LDAP.RoleMapping.LDAP.Group.UserRemoved
version: 1.0
[ClickHouse] SHALL not assign [RBAC] role(s) for the user authenticated using [LDAP] external user directory
if the user has been removed from the corresponding [LDAP] group(s) that map those role(s).
Any active user sessions SHALL have privileges provided by the role(s) until the next time the user is authenticated.
#### RQ.SRS-014.LDAP.RoleMapping.LDAP.Group.UserRemovedAndAdded.Parallel
version: 1.0
[ClickHouse] SHALL support authenticating users using [LDAP] external user directory
when [LDAP] users are added and removed from [LDAP] groups used to map to [RBAC] roles
at the same time as [LDAP] user authentications are performed in parallel.
### RBAC Roles
#### RQ.SRS-014.LDAP.RoleMapping.RBAC.Role.NotPresent
version: 1.0
[ClickHouse] SHALL not reject authentication attempt using [LDAP] external user directory if any of the roles that are
are mapped from [LDAP] but are not present locally.
#### RQ.SRS-014.LDAP.RoleMapping.RBAC.Role.Added
version: 1.0
[ClickHouse] SHALL add the privileges provided by the [LDAP] mapped role when the
role is not present during user authentication using [LDAP] external user directory
as soon as the role is added.
#### RQ.SRS-014.LDAP.RoleMapping.RBAC.Role.Removed
version: 1.0
[ClickHouse] SHALL remove the privileges provided by the role from all the
users authenticated using [LDAP] external user directory if the [RBAC] role that was mapped
as a result of [LDAP] search is removed.
#### RQ.SRS-014.LDAP.RoleMapping.RBAC.Role.Readded
version: 1.0
[ClickHouse] SHALL reassign the [RBAC] role and add all the privileges provided by the role
when it is re-added after removal for all [LDAP] users authenticated using external user directory
for any role that was mapped as a result of [LDAP] search.
#### RQ.SRS-014.LDAP.RoleMapping.RBAC.Role.RemovedAndAdded.Parallel
version: 1.0
[ClickHouse] SHALL support authenticating users using [LDAP] external user directory
when [RBAC] roles that are mapped by [LDAP] groups
are added and removed at the same time as [LDAP] user authentications are performed in parallel.
#### RQ.SRS-014.LDAP.RoleMapping.RBAC.Role.New
version: 1.0
[ClickHouse] SHALL not allow any new roles to be assigned to any
users authenticated using [LDAP] external user directory unless the role is specified
in the configuration of the external user directory or was mapped as a result of [LDAP] search.
#### RQ.SRS-014.LDAP.RoleMapping.RBAC.Role.NewPrivilege
version: 1.0
[ClickHouse] SHALL add new privilege to all the users authenticated using [LDAP] external user directory
when new privilege is added to one of the roles that were mapped as a result of [LDAP] search.
#### RQ.SRS-014.LDAP.RoleMapping.RBAC.Role.RemovedPrivilege
version: 1.0
[ClickHouse] SHALL remove privilege from all the users authenticated using [LDAP] external user directory
when the privilege that was provided by the mapped role is removed from all the roles
that were mapped as a result of [LDAP] search.
### Authentication
#### RQ.SRS-014.LDAP.RoleMapping.Authentication.Parallel
version: 1.0
[ClickHouse] SHALL support parallel authentication of users using [LDAP] server
when using [LDAP] external user directory that has role mapping enabled.
#### RQ.SRS-014.LDAP.RoleMapping.Authentication.Parallel.ValidAndInvalid
version: 1.0
[ClickHouse] SHALL support authentication of valid users and
prohibit authentication of invalid users using [LDAP] server
in parallel without having invalid attempts affecting valid authentications
when using [LDAP] external user directory that has role mapping enabled.
#### RQ.SRS-014.LDAP.RoleMapping.Authentication.Parallel.MultipleServers
version: 1.0
[ClickHouse] SHALL support parallel authentication of external [LDAP] users
authenticated using multiple [LDAP] external user directories that have
role mapping enabled.
#### RQ.SRS-014.LDAP.RoleMapping.Authentication.Parallel.LocalOnly
version: 1.0
[ClickHouse] SHALL support parallel authentication of users defined only locally
when one or more [LDAP] external user directories with role mapping
are specified in the configuration file.
#### RQ.SRS-014.LDAP.RoleMapping.Authentication.Parallel.LocalAndMultipleLDAP
version: 1.0
[ClickHouse] SHALL support parallel authentication of local and external [LDAP] users
authenticated using multiple [LDAP] external user directories with role mapping enabled.
#### RQ.SRS-014.LDAP.RoleMapping.Authentication.Parallel.SameUser
version: 1.0
[ClickHouse] SHALL support parallel authentication of the same external [LDAP] user
authenticated using the same [LDAP] external user directory with role mapping enabled.
### Server Configuration
#### BindDN Parameter
##### RQ.SRS-014.LDAP.RoleMapping.Configuration.Server.BindDN
version: 1.0
[ClickHouse] SHALL support the `<bind_dn>` parameter in the `<ldap_servers><server_name>` section
of the `config.xml` that SHALL be used to construct the `DN` to bind to.
The resulting `DN` SHALL be constructed by replacing all `{user_name}` substrings of the template
with the actual user name during each authentication attempt.
For example,
```xml
<yandex>
<ldap_servers>
<my_ldap_server>
<!-- ... -->
<bind_dn>uid={user_name},ou=users,dc=example,dc=com</bind_dn>
<!-- ... -->
</my_ldap_server>
</ldap_servers>
</yandex>
```
##### RQ.SRS-014.LDAP.RoleMapping.Configuration.Server.BindDN.ConflictWith.AuthDN
version: 1.0
[ClickHouse] SHALL return an error if both `<bind_dn>` and `<auth_dn_prefix>` or `<auth_dn_suffix>` parameters
are specified as part of [LDAP] server description in the `<ldap_servers>` section of the `config.xml`.
### External User Directory Configuration
#### Syntax
##### RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.Syntax
version: 1.0
[ClickHouse] SHALL support the `role_mapping` sub-section in the `<user_directories><ldap>` section
of the `config.xml`.
For example,
```xml
<yandex>
<user_directories>
<ldap>
<!-- ... -->
<role_mapping>
<base_dn>ou=groups,dc=example,dc=com</base_dn>
<attribute>cn</attribute>
<scope>subtree</scope>
<search_filter>(&amp;(objectClass=groupOfNames)(member={bind_dn}))</search_filter>
<prefix>clickhouse_</prefix>
</role_mapping>
</ldap>
</user_directories>
</yandex>
```
#### Special Characters Escaping
##### RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.SpecialCharactersEscaping
version: 1.0
[ClickHouse] SHALL support properly escaped special XML characters that can be present
as part of the values for different configuration parameters inside the
`<user_directories><ldap><role_mapping>` section of the `config.xml` such as
* `<search_filter>` parameter
* `<prefix>` parameter
#### Multiple Sections
##### RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.MultipleSections
version: 1.0
[ClickHouse] SHALL support multiple `<role_mapping>` sections defined inside the same `<user_directories><ldap>` section
of the `config.xml` and all of the `<role_mapping>` sections SHALL be applied.
##### RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.MultipleSections.IdenticalParameters
version: 1.0
[ClickHouse] SHALL not duplicate mapped roles when multiple `<role_mapping>` sections
with identical parameters are defined inside the `<user_directories><ldap>` section
of the `config.xml`.
#### BaseDN Parameter
##### RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.BaseDN
version: 1.0
[ClickHouse] SHALL support the `<base_dn>` parameter in the `<user_directories><ldap><role_mapping>` section
of the `config.xml` that SHALL specify the template to be used to construct the base `DN` for the [LDAP] search.
The resulting `DN` SHALL be constructed by replacing all the `{user_name}` and `{bind_dn}` substrings of
the template with the actual user name and bind `DN` during each [LDAP] search.
#### Attribute Parameter
##### RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.Attribute
version: 1.0
[ClickHouse] SHALL support the `<attribute>` parameter in the `<user_directories><ldap><role_mapping>` section of
the `config.xml` that SHALL specify the name of the attribute whose values SHALL be returned by the [LDAP] search.
#### Scope Parameter
##### RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.Scope
version: 1.0
[ClickHouse] SHALL support the `<scope>` parameter in the `<user_directories><ldap><role_mapping>` section of
the `config.xml` that SHALL define the scope of the LDAP search as defined
by the https://ldapwiki.com/wiki/LDAP%20Search%20Scopes.
##### RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.Scope.Value.Base
version: 1.0
[ClickHouse] SHALL support the `base` value for the the `<scope>` parameter in the
`<user_directories><ldap><role_mapping>` section of the `config.xml` that SHALL
limit the scope as specified by the https://ldapwiki.com/wiki/BaseObject.
##### RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.Scope.Value.OneLevel
version: 1.0
[ClickHouse] SHALL support the `one_level` value for the the `<scope>` parameter in the
`<user_directories><ldap><role_mapping>` section of the `config.xml` that SHALL
limit the scope as specified by the https://ldapwiki.com/wiki/SingleLevel.
##### RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.Scope.Value.Children
version: 1.0
[ClickHouse] SHALL support the `children` value for the the `<scope>` parameter in the
`<user_directories><ldap><role_mapping>` section of the `config.xml` that SHALL
limit the scope as specified by the https://ldapwiki.com/wiki/SubordinateSubtree.
##### RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.Scope.Value.Subtree
version: 1.0
[ClickHouse] SHALL support the `children` value for the the `<scope>` parameter in the
`<user_directories><ldap><role_mapping>` section of the `config.xml` that SHALL
limit the scope as specified by the https://ldapwiki.com/wiki/WholeSubtree.
##### RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.Scope.Value.Default
version: 1.0
[ClickHouse] SHALL support the `subtree` as the default value for the the `<scope>` parameter in the
`<user_directories><ldap><role_mapping>` section of the `config.xml` when the `<scope>` parameter is not specified.
#### Search Filter Parameter
##### RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.SearchFilter
version: 1.0
[ClickHouse] SHALL support the `<search_filter>` parameter in the `<user_directories><ldap><role_mapping>`
section of the `config.xml` that SHALL specify the template used to construct
the [LDAP filter](https://ldap.com/ldap-filters/) for the search.
The resulting filter SHALL be constructed by replacing all `{user_name}`, `{bind_dn}`, and `{base_dn}` substrings
of the template with the actual user name, bind `DN`, and base `DN` during each the [LDAP] search.
#### Prefix Parameter
##### RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.Prefix
version: 1.0
[ClickHouse] SHALL support the `<prefix>` parameter in the `<user directories><ldap><role_mapping>`
section of the `config.xml` that SHALL be expected to be in front of each string in
the original list of strings returned by the [LDAP] search.
Prefix SHALL be removed from the original strings and resulting strings SHALL be treated as [RBAC] role names.
##### RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.Prefix.Default
version: 1.0
[ClickHouse] SHALL support empty string as the default value of the `<prefix>` parameter in
the `<user directories><ldap><role_mapping>` section of the `config.xml`.
##### RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.Prefix.WithUTF8Characters
version: 1.0
[ClickHouse] SHALL support UTF8 characters as the value of the `<prefix>` parameter in
the `<user directories><ldap><role_mapping>` section of the `config.xml`.
##### RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.Prefix.WithSpecialXMLCharacters
version: 1.0
[ClickHouse] SHALL support XML special characters as the value of the `<prefix>` parameter in
the `<user directories><ldap><role_mapping>` section of the `config.xml`.
##### RQ.SRS-014.LDAP.RoleMapping.Configuration.UserDirectory.RoleMapping.Prefix.WithSpecialRegexCharacters
version: 1.0
[ClickHouse] SHALL support regex special characters as the value of the `<prefix>` parameter in
the `<user directories><ldap><role_mapping>` section of the `config.xml`.
## References
* **Access Control and Account Management**: https://clickhouse.tech/docs/en/operations/access-rights/
* **LDAP**: https://en.wikipedia.org/wiki/Lightweight_Directory_Access_Protocol
* **ClickHouse:** https://clickhouse.tech
* **GitHub Repository**: https://github.com/ClickHouse/ClickHouse/blob/master/tests/testflows/ldap/role_mapping/requirements/requirements.md
* **Revision History**: https://github.com/ClickHouse/ClickHouse/commits/master/tests/testflows/ldap/role_mapping/requirements/requirements.md
* **Git:** https://git-scm.com/
[RBAC]: https://clickhouse.tech/docs/en/operations/access-rights/
[SRS]: #srs
[Access Control and Account Management]: https://clickhouse.tech/docs/en/operations/access-rights/
[SRS-009 ClickHouse LDAP External User Directory]: https://github.com/ClickHouse/ClickHouse/blob/master/tests/testflows/ldap/external_user_directory/requirements/requirements.md
[SRS-007 ClickHouse Authentication of Users via LDAP]: https://github.com/ClickHouse/ClickHouse/blob/master/tests/testflows/ldap/authentication/requirements/requirements.md
[LDAP]: https://en.wikipedia.org/wiki/Lightweight_Directory_Access_Protocol
[ClickHouse]: https://clickhouse.tech
[GitHub Repository]: https://github.com/ClickHouse/ClickHouse/blob/master/tests/testflows/ldap/role_mapping/requirements/requirements.md
[Revision History]: https://github.com/ClickHouse/ClickHouse/commits/master/tests/testflows/ldap/role_mapping/requirements/requirements.md
[Git]: https://git-scm.com/
[GitHub]: https://github.com
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