Steps to generate an access token using OAuth2 Authentication

Does HDP support OAuth 2.0 Authentication?
How to generate an OAuth access token with HDP?
 

Below is a comprehensive step by step process to generate an access token using OAuth2 Authentication.

1. Register an application in Hybrid Data Pipeline for OAuth 2.0 Authorization.
To do that, Open Postman and send a POST REQUEST as shown below [Auth type : Basic Authentication]

{
  "name": "Application_Name",
  "description": "Application_description",
  "redirectUrls": [
    "https://domainname/landingpage.html"
  ]
}

NOTE: Auth type : Basic Authentication and provide the HDP credentials that you have supplied during installation and to access the HDP UI.

If your application is already registered you'll get the following result. In which case you can go to Step 2.
 

{
  "error": {
    "code": 222206626,
    "message": {
      "lang": "en-US",
      "value": "OAuth Client Application with name 'Application_Name' already exists. "
    }
  }
}

2. If your application is already registered you could, Get Registered applications for the current user.
Open Postman and send a GET REQUEST as shown below
http://domain:port/api/mgmt/oauth/client/applications [Auth type : Basic Authentication]

This will retrieve a list of applications as shown below. You should NOTE the application ID.

{
  "applications": [
    {
      "id": 1,
      "name": "SalesforceAuth",
      "description": "Salesforce Lightning Connect via OData",
      "redirectUrls": [
        "https://xxxxxxxxxxxxx/views/oauthredirect.html"
      ]
    },
    {
      "id": 2,
      "name": "SalesforceAuth2",
      "description": "Salesforce Lightning Connect via OData",
      "redirectUrls": [
        "dummy.callback.url"
      ]
    },
    {
      "id": 3,
      "name": "PowerBIAuth",
      "description": "Connect to Power BI via OAuth2",
      "redirectUrls": [
        "https://xxxxxxxxxxxxxxxx/views/oauthredirect.html"
      ]
    }
  ]
}

3. To Get Client Code and Secret using the Application ID. [Auth type : Basic Authentication]
http://domain:port/api/mgmt/oauth/client/applications/<numeric_id>?user=<username>
Example: http://domain:port/api/mgmt/oauth/client/applications/3?user=xxadmin

This will return the Client and the Secret code as follows

{
  "id": 3,
  "name": "PowerBIAuth",
  "description": "Connect to Power BI via OAuth2",
  "redirectUrls": [
    "https://xxxxxxxxxxxxxxxxx/views/oauthredirect.html"
  ],
  "clientId": "d65cfcd1-87axxxxxxxxxxxxxxxxcdce753",
  "clientSecret": "ef2b058a-0xxxxxxxxxxxxx0-b3beea3283a8"
}

4. Use the Client and the Secret Code to get the Token.
Open Postman and send a POST REQUEST as shown below
http://domain:port/oauth2/token [Auth type : No Auth]

You need to pass the payload as "application/x-www-form-urlencoded"
Example Payload:
grant_type:password
scope:api.access.odata
username:d2cadmin
password:d2cadmin
client_id: d65cfcd1xxxxxxxxxxb-6a834cdce753
client_secret:d65cfcxxxxxxxxxxxxx99b-6a834cdce753

A successful post should return the result as follows.

{
  "access_token": "f20d5696aa67a19a1ea83088xxxxxxxxxxxxxxxcaeb9c896aecb3ffd5",
  "refresh_token": "1b47521b220078b58f05800xxxxxxxxxxxx86c82e172ad94bc63c159e91dc",
  "expires_in": 3599
}

References to Other Documentation:
https://documentation-test.progress.com/output/DataDirect/hybridpipeline/index.html#page/hybrid/configuring-hybrid-data-pipeline-to-authorize-cl.html