---
date: "2016-12-01T16:00:00+02:00"
title: "Authentication"
slug: "authentication"
weight: 10
toc: true
draft: false
menu:
  sidebar:
    parent: "features"
    name: "Authentication"
    weight: 10
    identifier: "authentication"
---

---
name: Authentication
---

# Authentication

## LDAP (Lightweight Directory Access Protocol)

Both the LDAP via BindDN and the simple auth LDAP share the following fields:

- Authorization Name **(required)**
  - A name to assign to the new method of authorization.

- Host **(required)**
  - The address where the LDAP server can be reached.
  - Example: `mydomain.com`

- Port **(required)**
  - The port to use when connecting to the server.
  - Example: `389` for LDAP or `636` for LDAP SSL

- Enable TLS Encryption (optional)
  - Whether to use TLS when connecting to the LDAP server.

- Admin Filter (optional)
  - An LDAP filter specifying if a user should be given administrator
    privileges. If a user account passes the filter, the user will be
    privileged as an administrator.
  - Example: `(objectClass=adminAccount)`
  - Example for Microsoft Active Directory (AD): `(memberOf=CN=admin-group,OU=example,DC=example,DC=org)`

- Username attribute (optional)
  - The attribute of the user's LDAP record containing the user name. Given
    attribute value will be used for new Gitea account user name after first
    successful sign-in. Leave empty to use login name given on sign-in form.
  - This is useful when supplied login name is matched against multiple
    attributes, but only single specific attribute should be used for Gitea
    account name, see "User Filter".
  - Example: `uid`
  - Example for Microsoft Active Directory (AD): `sAMAccountName`

- First name attribute (optional)
  - The attribute of the user's LDAP record containing the user's first name.
    This will be used to populate their account information.
  - Example: `givenName`

- Surname attribute (optional)
  - The attribute of the user's LDAP record containing the user's surname.
    This will be used to populate their account information.
  - Example: `sn`

- E-mail attribute **(required)**
  - The attribute of the user's LDAP record containing the user's email
    address. This will be used to populate their account information.
  - Example: `mail`

**LDAP via BindDN** adds the following fields:

- Bind DN (optional)
  - The DN to bind to the LDAP server with when searching for the user. This
    may be left blank to perform an anonymous search.
  - Example: `cn=Search,dc=mydomain,dc=com`

- Bind Password (optional)
  - The password for the Bind DN specified above, if any. _Note: The password
    is stored in plaintext at the server. As such, ensure that your Bind DN
    has as few privileges as possible._

- User Search Base **(required)**
  - The LDAP base at which user accounts will be searched for.
  - Example: `ou=Users,dc=mydomain,dc=com`

- User Filter **(required)**
  - An LDAP filter declaring how to find the user record that is attempting to
    authenticate. The `%s` matching parameter will be substituted with login
    name given on sign-in form.
  - Example: `(&(objectClass=posixAccount)(uid=%s))`
  - Example for Microsoft Active Directory (AD): `(&(objectCategory=Person)(memberOf=CN=user-group,OU=example,DC=example,DC=org)(sAMAccountName=%s)(!(UserAccountControl:1.2.840.113556.1.4.803:=2)))`
  - To substitute more than once `%[1]s` should be used instead, e.g. when
    matching supplied login name against multiple attributes such as user
    identifier, email or even phone number.
  - Example: `(&(objectClass=Person)(|(uid=%[1]s)(mail=%[1]s)(mobile=%[1]s)))`

**LDAP using simple auth** adds the following fields:

- User DN **(required)**
  - A template to use as the user's DN. The `%s` matching parameter will be substituted with login name given on sign-in form.
  - Example: `cn=%s,ou=Users,dc=mydomain,dc=com`
  - Example: `uid=%s,ou=Users,dc=mydomain,dc=com`

- User Filter **(required)**
  - An LDAP filter declaring when a user should be allowed to log in. The `%s`
    matching parameter will be substituted with login name given on sign-in
    form.
  - Example: `(&(objectClass=posixAccount)(cn=%s))`
  - Example: `(&(objectClass=posixAccount)(uid=%s))`

**Verify group membership in LDAP** uses the following fields:

* Group Search Base (optional)
    * The LDAP DN used for groups.
    * Example: `ou=group,dc=mydomain,dc=com`

* Group Name Filter (optional)
    * An LDAP filter declaring how to find valid groups in the above DN.
    * Example: `(|(cn=gitea_users)(cn=admins))`

* User Attribute in Group (optional)
    * Which user LDAP attribute is listed in the group.
    * Example: `uid`

* Group Attribute for User (optional)
    * Which group LDAP attribute contains an array above user attribute names.
    * Example: `memberUid`

## PAM (Pluggable Authentication Module)

To configure this you just need to set the 'PAM Service Name' to a filename in `/etc/pam.d/`.
If you want it to work with normal Linux passwords, the user running Gitea must have read access to `/etc/shadow`.

## SMTP (Simple Mail Transfer Protocol)

This option allows Gitea to log in to your SMTP host as a Gitea user. To configure this, simply set the fields below:

- Authentication Name **(required)**
  - A name to assign to the new method of authorization.

- SMTP Authentication Type **(required)**
  - Type of authentication for use on your SMTP host, PLAIN or LOGIN.

- Host **(required)**
  - The address where the SMTP host can be reached.
  - Example: `smtp.mydomain.com`

- Port **(required)**
  - The port to use when connecting to the server.
  - Example: `587`

- Allowed Domains
  - Restrict what domains can log in if you're using public SMTP host or SMTP host with multiple domains.
  - Example: `gitea.io,mydomain.com,mydomain2.com`

- Enable TLS Encryption
  - Enable TLS encryption on authentication.

- Skip TLS Verify
  - Disable TLS verify on authentication.
  
- This authentication is activate
  - Enable or disable this auth.

## FreeIPA

- In order to log in to Gitea using FreeIPA credentials, you need to create a bind account for Gitea to use:

-  On the FreeIPA server, create a `gitea.ldif` file, replacing `dc=example,dc=com` with your DN, and providing an appropriately secure password:
```
  dn: uid=gitea,cn=sysaccounts,cn=etc,dc=example,dc=com
  changetype: add
  objectclass: account
  objectclass: simplesecurityobject
  uid: gitea
  userPassword: secure password
  passwordExpirationTime: 20380119031407Z
  nsIdleTimeout: 0
```

- Import the LDIF (change localhost to an IPA server if needed), you’ll be prompted for your Directory Manager password:
```
  ldapmodify -h localhost -p 389 -x -D \
  "cn=Directory Manager" -W -f gitea.ldif
```
-  Add an IPA group for gitea_users :
```
  ipa group-add --desc="Gitea Users" gitea_users
```
-  Note: If you get an error about IPA credentials, please run `kinit admin` and give your admin account password.

-  Now login to the Gitea as an Administrator, click on "Authentication" under Admin Panel. Then click `Add New Source` and fill in the details, changing all where appropriate to your own domain.
