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REST API Authentication On Atlassian using Github as OAuth Provider

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Using this app, you can authenticate the Application APIs using any third party OAuth/OIDC provider or API Tokens. The app supports Azure AD, Keycloak, Okta, AWS Cognito, Google, Github, Slack, Gitlab, Facebook and any custom provider.

Atlassian provides REST APIs to perform a number of operations such as Create Page, Delete Page, Add Comment, Create Space, etc. However, it supports only two authentication methods for REST APIs:
  1. Basic Authentication
  2. Using OAuth 1.0
The REST API Authentication plugin allows you to use any third party OAuth 2.0 provider/ OpenID connect to authenticate REST APIs. Here we will go through a guide to configure Azure AD as Provider.

Download And Installation

  • Log into your atlassian instance as admin.
  • Navigate to the settings menu and Click Manage Apps.
  • Click Find new apps or Find new add-ons from the left-hand side of the page.
  • Locate API Token/OAuth Authentication app.
  • Click Try free to begin a new trial or Buy now to purchase a license.
  • Enter your information and click Generate license when redirected to MyAtlassian.
  • Click Apply license.

Step 1: Configure Github server:

  • Login to GitHub : Go to Github Developer and login with your account. Click on settings.
Rest API OAuth, API token, API Key authentication for Jira and Confluence Github
  • Select Developer settings. And Select OAuth Apps and click on Register a new application button.
Rest API OAuth, API token, API Key authentication for Jira and Confluence Github  
  • Enter app credentials : Enter app name, plugin homepage URL. Enter the Application base URL under Authorized callback URL field.
Rest API OAuth, API token, API Key authentication for Jira and Confluence Github  
  • Copy Client ID and Client Secret.

Rest API OAuth, API token, API Key authentication for Jira and Confluence Github

 

Step 2: Fetch Access token through POSTMAN:

  • Open the Postman Application (Here is the link to download Postman Application).
  • Go to Authorization tab.
  • From the dropdown select type as OAuth 2.0 and  click on Get access token.
  • Add the following information from the table below.
  • Postman starts the authentication flow and prompts you to use the access token.
  • Select Add token to the header.
Field Value
Grant type Authorization Code or Client Credentials
Callback URL Enter application's base URL if you dont have a callback URL
Auth URL https://github.com/login/oauth/authorize
Access token URL https://github.com/login/oauth/access_token
Client ID Enter the Github Client ID
Client secret Enter the Github  Client secret
Scope Blank
Client Authentication Send as Basic Auth Header
Rest API OAuth, API token, API Key authentication for Jira and Confluence Github Access Token  
  • Copy the Access Token or click on Use Token.
A sample access token from Github Provider looks like this. 
A834c0606ba71336423013699db8e971

Step 3: Fetch Username through Github:

  • Choose the method type as "GET".
  • Enter the interoception Endpoint from the plugin to fetch the username in the Request URL. For Github it is "https://api.github.com/user".
  • Go to the Authorization tab select the Bearer Token and enter the access token here.
  • Add the header "content-type: application/json" and click on Send.
Rest API OAuth, API token, API Key authentication for Jira and Confluence Username Request: 
     curl 
     -X GET 
     -H "Authorization: Bearer <Access Token>" 
     -H "Content-type: application/json" 
     https://api.github.com/user
Copy the attribute value against the username, you will need to configure it in plugin. In this example, the value is "login".
 

Step 4: Configure the Rest API plugin:

Step 1: Enable Rest API Authentication:
  • After installing the app, navigate to the Global Settings tab.
  • Here you will have to Enable the Authentication through Enable REST API Authentication and click on Save.
  • Go to the OAuth/OIDC tab and in the dropdown provided select Github as the OAuth provider.
  • Enter the attribute value against which we received the username in the Postman response.
  • Save the settings.
Rest API OAuth, API token, API Key authentication for Jira and Confluence
Step 2: Disable Basic Authentication:
  • Disabling this will restrict all the REST API call made using Basic Authentication.
 

Step 5: Test REST API using access token:

  • Call any REST API. Include the access token in the Authorization header. Here’s an example of fetching content from Confluence.
  • Go to the Postman application select method type as GET and enter the Request URL. For eg. http://{Confluence_Base_URL}/confluence/rest/api/content/
  • In the Authorization tab select type as Bearer Token.
Rest API OAuth, API token, API Key authentication for Jira and Confluence  
  • In the Header tab add the header “content-type: application/json and send the request.
Rest API OAuth, API token, API Key authentication for Jira and Confluence Request: 
     curl 
     -X GET  
     -H "Authorization: Bearer <Access Token>" 
     -H "Content-type: application/json" 
     http://{confluence_base_url}/confluence/rest/api/content/
  • This will show the content in Confluence and will return the status 200.
  • If the token is invalid or missing, the call will return a 401 Unauthorized response


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