oauth-2.0 – Page 16 – Tarik Billa

How do I get an OAuth 2.0 authentication token in C#

January 6, 2023 by Tarik

In Postman, click Generate Code and then in Generate Code Snippets dialog you can select a different coding language, including C# (RestSharp). Also, you should only need the access token URL. The form parameters are then: grant_type=client_credentials client_id=abc client_secret=123 Code Snippet: /* using RestSharp; // https://www.nuget.org/packages/RestSharp/ */ var client = new RestClient(“https://service.endpoint.com/api/oauth2/token”); var request = … Read more

OAuth 2.0 Authorization Header

January 6, 2023 by Tarik

For those looking for an example of how to pass the OAuth2 authorization (access token) in the header (as opposed to using a request or body parameter), here is how it’s done: Authorization: Bearer 0b79bab50daca910b000d4f1a2b675d604257e42

Do Keycloak Clients have a Client Secret?

January 5, 2023 by Tarik

Your client need to have the access-type set to confidential , then you will have a new tab credentials where you will see the client secret. https://wjw465150.gitbooks.io/keycloak-documentation/content/server_admin/topics/clients/oidc/confidential.html

How to Logout of an Application Where I Used OAuth2 To Login With Google?

January 5, 2023 by Tarik

Overview of OAuth: Is the User Who He/She Says He/She is?: I’m not sure if you used OAuth to login to Stack Overflow, like the “Login with Google” option, but when you use this feature, Stack Overflow is simply asking Google if it knows who you are: “Yo Google, this Vinesh fella claims that vinesh.e@gmail.com … Read more

Where to store the refresh token on the Client?

January 4, 2023 by Tarik

You can store tokens securely in HttpOnly cookies. https://medium.com/@sadnub/simple-and-secure-api-authentication-for-spas-e46bcea592ad If you worry about long-living Refresh Token. You can skip storing it and not use it at all. Just keep Access Token in memory and do silent sign-in when Access Token expires. Don’t use Implicit flow because it’s obsolete. The most secure way of authentication for … Read more

client secret in OAuth 2.0

January 3, 2023 by Tarik

I had the same question as the question 1 here, and did some research myself recently, and my conclusion is that it is ok to not keep “client secret” a secret. The type of clients that do not keep confidentiality of client secret is called “public client” in the OAuth2 spec. The possibility of someone … Read more

Using Postman to access OAuth 2.0 Google APIs

January 2, 2023 by Tarik

Postman will query Google API impersonating a Web Application Generate an OAuth 2.0 token: Ensure that the Google APIs are enabled Create an OAuth 2.0 client ID Go to Google Console -> API -> OAuth consent screen Add getpostman.com to the Authorized domains. Click Save. Go to Google Console -> API -> Credentials Click ‘Create … Read more

What’s the right OAuth 2.0 flow for a mobile app

December 31, 2022 by Tarik

Clarification: Mobile App = Native App As stated in other comments and a few sources online, implicit seems like a natural fit for mobile apps, however the best solution is not always clear cut (and in fact implicit is not recommended for reasons discussed below). Native App OAuth2 Best Practises Whatever approach you choose (there … Read more

How can I revoke a JWT token?

December 31, 2022 by Tarik

In general the easiest answer would be to say that you cannot revoke a JWT token, but that’s simply not true. The honest answer is that the cost of supporting JWT revocation is sufficiently big for not being worth most of the times or plainly reconsider an alternative to JWT. Having said that, in some … Read more

PG undefinedtable error relation users does not exist

December 30, 2022 by Tarik

At first, you shall detach all connections out of database. By default you use the development environment. Then try to reset database with the following: rake db:reset The rake db:reset task will drop the database and set it up again. This is functionally equivalent to rake db:drop db:setup. This is not the same as running … Read more