aiforge/docs/content/doc/advanced/oauth2-provider.md

---
date: "2019-04-19:44:00+01:00"
title: "OAuth2 provider"
slug: "oauth2-provider"
weight: 41
toc: true
draft: false
menu:
  sidebar:
    parent: "advanced"
    name: "OAuth2 Provider"
    weight: 41
    identifier: "oauth2-provider"
---


# OAuth2 provider

Gitea supports acting as an OAuth2 provider to allow third party applications to access its resources with the user's consent. This feature is available since release 1.8.0.

## Endpoints


Endpoint               | URL
-----------------------|----------------------------
Authorization Endpoint | `/login/oauth/authorize`
Access Token Endpoint  | `/login/oauth/access_token`


## Supported OAuth2 Grants

At the moment Gitea only supports the [**Authorization Code Grant**](https://tools.ietf.org/html/rfc6749#section-1.3.1) standard with additional support of the [Proof Key for Code Exchange (PKCE)](https://tools.ietf.org/html/rfc7636) extension.
 

To use the Authorization Code Grant as a third party application it is required to register a new application via the "Settings" (`/user/settings/applications`) section of the settings.

## Scopes

Currently Gitea does not support scopes (see [#4300](https://github.com/go-gitea/gitea/issues/4300)) and all third party applications will be granted access to all resources of the user and his/her organizations.

## Example

**Note:** This example does not use PKCE.

1. Redirect to user to the authorization endpoint in order to get his/her consent for accessing the resources:

```curl
https://[YOUR-GITEA-URL]/login/oauth/authorize?client_id=CLIENT_ID&redirect_uri=REDIRECT_URI& response_type=code&state=STATE
``` 

The `CLIENT_ID` can be obtained by registering an application in the settings. The `STATE` is a random string that will be send back to your application after the user authorizes. The `state` parameter is optional but should be used to prevent CSRF attacks.


![Authorization Page](/authorize.png)

The user will now be asked to authorize your application. If they authorize it, the user will be redirected to the `REDIRECT_URL`, for example:

```curl
https://[REDIRECT_URI]?code=RETURNED_CODE&state=STATE
```

2. Using the provided `code` from the redirect, you can request a new application and refresh token. The access token endpoints accepts POST requests with  `application/json` and `application/x-www-form-urlencoded` body, for example:

```curl
POST https://[YOUR-GITEA-URL]/login/oauth/access_token
```

```json
{
	"client_id": "YOUR_CLIENT_ID",
	"client_secret": "YOUR_CLIENT_SECRET",
	"code": "RETURNED_CODE",
	"grant_type": "authorization_code",
	"redirect_uri": "REDIRECT_URI"
}
```

Response:
```json
{  
"access_token":"eyJhbGciOiJIUzUxMiIsInR5cCI6IkpXVCJ9.eyJnbnQiOjIsInR0IjowLCJleHAiOjE1NTUxNzk5MTIsImlhdCI6MTU1NTE3NjMxMn0.0-iFsAwBtxuckA0sNZ6QpBQmywVPz129u75vOM7wPJecw5wqGyBkmstfJHAjEOqrAf_V5Z-1QYeCh_Cz4RiKug",  
"token_type":"bearer",  
"expires_in":3600,  
"refresh_token":"eyJhbGciOiJIUzUxMiIsInR5cCI6IkpXVCJ9.eyJnbnQiOjIsInR0IjoxLCJjbnQiOjEsImV4cCI6MTU1NzgwNDMxMiwiaWF0IjoxNTU1MTc2MzEyfQ.S_HZQBy4q9r5SEzNGNIoFClT43HPNDbUdHH-GYNYYdkRfft6XptJBkUQscZsGxOW975Yk6RbgtGvq1nkEcklOw"  
}
```

The `CLIENT_SECRET` is the unique secret code generated for this application. Please note that the secret will only be visible after you created/registered the application with Gitea and cannot be recovered. If you lose the secret you must regenerate the secret via the application's settings.

The `REDIRECT_URI` in the `access_token` request must match the `REDIRECT_URI` in the `authorize` request.

3. Use the  `access_token` to make [API requests](https://docs.gitea.io/en-us/api-usage#oauth2) to access the user's resources.