Authenticate to Azure SDK for JavaScript using oAuth token from Azure AD

1. I’m writing a vanilla JavaScript application using Express.js and Node.js version 14.10.
2. I’m using the Microsoft Authentication Library (MSAL) for JS to log into Azure Active Directory

Question

How do I authenticate to Azure Resource Management APIs using an oAuth token that I received from Azure Active Directory (AAD)? I can’t find any constructor to feed the oAuth token into, so I can obtain a ServiceCredentials object.

All of the examples are useless, because they show how to perform an “interactive login,” which isn’t what I want.

I already have a valid oAuth token. How do I use it in the Azure SDK for JS?

[daviwil]

Hey Trevor, long time no see!

@ramya-rao-a’s most recent suggestion is the simplest way to go, you’ll want to create a simple class or object that implements ServiceClientCredentials to wrap the token you get back from MSAL. Here’s a full example of how you’d do that in JavaScript:

const { HttpHeaders } = require("@azure/ms-rest-js");

function getCredentialForToken(accessToken) {
  return {
    signRequest: (request) => {
      if (!request.headers) request.headers = new HttpHeaders();
      request.headers.set("Authorization", `Bearer ${accessToken}`);
      return Promise.resolve(request);
    }
  };
}

const creds = getCredentialForToken("your token from MSAL");

You can then pass creds into the constructor of the Azure SDK client library you’re using.

[ramya-rao-a]

Looks like that solution worked for you @pcgeek86, thanks for reporting the issue.

@daviwil, As discussed offline, can you update the readme for @azure/ms-rest-nodeauth to include a note on the above solution if the one already has an access token? Logged https://github.com/Azure/ms-rest-nodeauth/issues/103