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backport #21227 author @svenseeberg Co-authored-by: Sven Seeberg <mail@sven-seeberg.de> Co-authored-by: Giteabot <teabot@gitea.io>
132 lines
5.3 KiB
Markdown
132 lines
5.3 KiB
Markdown
# Gitea LDAP Authentication Module
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## About
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This authentication module attempts to authorize and authenticate a user
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against an LDAP server. It provides two methods of authentication: LDAP via
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BindDN, and LDAP simple authentication.
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LDAP via BindDN functions like most LDAP authentication systems. First, it
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queries the LDAP server using a Bind DN and searches for the user that is
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attempting to sign in. If the user is found, the module attempts to bind to the
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server using the user's supplied credentials. If this succeeds, the user has
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been authenticated, and his account information is retrieved and passed to the
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Gogs login infrastructure.
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LDAP simple authentication does not utilize a Bind DN. Instead, it binds
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directly with the LDAP server using the user's supplied credentials. If the bind
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succeeds and no filter rules out the user, the user is authenticated.
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LDAP via BindDN is recommended for most users. By using a Bind DN, the server
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can perform authorization by restricting which entries the Bind DN account can
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read. Further, using a Bind DN with reduced permissions can reduce security risk
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in the face of application bugs.
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## Usage
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To use this module, add an LDAP authentication source via the Authentications
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section in the admin panel. Both the LDAP via BindDN and the simple auth LDAP
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share the following fields:
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* Authorization Name **(required)**
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* A name to assign to the new method of authorization.
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* Host **(required)**
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* The address where the LDAP server can be reached.
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* Example: mydomain.com
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* Port **(required)**
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* The port to use when connecting to the server.
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* Example: 636
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* Enable TLS Encryption (optional)
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* Whether to use TLS when connecting to the LDAP server.
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* Admin Filter (optional)
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* An LDAP filter specifying if a user should be given administrator
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privileges. If a user accounts passes the filter, the user will be
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privileged as an administrator.
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* Example: (objectClass=adminAccount)
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* First name attribute (optional)
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* The attribute of the user's LDAP record containing the user's first name.
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This will be used to populate their account information.
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* Example: givenName
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* Surname attribute (optional)
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* The attribute of the user's LDAP record containing the user's surname This
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will be used to populate their account information.
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* Example: sn
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* E-mail attribute **(required)**
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* The attribute of the user's LDAP record containing the user's email
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address. This will be used to populate their account information.
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* Example: mail
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**LDAP via BindDN** adds the following fields:
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* Bind DN (optional)
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* The DN to bind to the LDAP server with when searching for the user. This
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may be left blank to perform an anonymous search.
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* Example: cn=Search,dc=mydomain,dc=com
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* Bind Password (optional)
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* The password for the Bind DN specified above, if any. _Note: The password
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is stored in plaintext at the server. As such, ensure that your Bind DN
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has as few privileges as possible._
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* User Search Base **(required)**
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* The LDAP base at which user accounts will be searched for.
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* Example: ou=Users,dc=mydomain,dc=com
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* User Filter **(required)**
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* An LDAP filter declaring how to find the user record that is attempting to
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authenticate. The '%[1]s' matching parameter will be substituted with the
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user's username.
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* Example: (&(objectClass=posixAccount)(|(uid=%[1]s)(mail=%[1]s)))
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**LDAP using simple auth** adds the following fields:
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* User DN **(required)**
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* A template to use as the user's DN. The `%s` matching parameter will be
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substituted with the user's username.
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* Example: cn=%s,ou=Users,dc=mydomain,dc=com
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* Example: uid=%s,ou=Users,dc=mydomain,dc=com
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* User Search Base (optional)
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* The LDAP base at which user accounts will be searched for.
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* Example: ou=Users,dc=mydomain,dc=com
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* User Filter **(required)**
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* An LDAP filter declaring when a user should be allowed to log in. The `%[1]s`
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matching parameter will be substituted with the user's username.
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* Example: (&(objectClass=posixAccount)(|(cn=%[1]s)(mail=%[1]s)))
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* Example: (&(objectClass=posixAccount)(|(uid=%[1]s)(mail=%[1]s)))
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**Verify group membership in LDAP** uses the following fields:
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* Group Search Base (optional)
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* The LDAP DN used for groups.
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* Example: ou=group,dc=mydomain,dc=com
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* Group Name Filter (optional)
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* An LDAP filter declaring how to find valid groups in the above DN.
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* Example: (|(cn=gitea_users)(cn=admins))
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* User Attribute in Group (optional)
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* The user attribute that is used to reference a user in the group object.
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* Example: uid if the group objects contains a member: bender and the user object contains a uid: bender.
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* Example: dn if the group object contains a member: uid=bender,ou=users,dc=planetexpress,dc=com.
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* Group Attribute for User (optional)
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* The attribute of the group object that lists/contains the group members.
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* Example: memberUid or member
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* Team group map (optional)
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* Automatically add users to Organization teams, depending on LDAP group memberships.
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* Note: this function only adds users to teams, it never removes users.
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* Example: {"cn=MyGroup,cn=groups,dc=example,dc=org": {"MyGiteaOrganization": ["MyGiteaTeam1", "MyGiteaTeam2", ...], ...}, ...}
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* Team group map removal (optional)
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* If set to true, users will be removed from teams if they are not members of the corresponding group.
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