---
title: "OAuth 2.0 authorization in PostgreSQL using Keycloak as an example"
url: https://daily.dev/posts/oauth-2-0-authorization-in-postgresql-using-keycloak-as-an-example-aoagjltnw
source_url: https://habr.com/en/companies/tantor/articles/959776/
type: article
source: "habr"
published: 2025-10-24T09:45:48.891Z
updated: 2025-10-24T09:46:18.286Z
tags: ["security", "infrastructure", "authentication", "postgresql", "oauth"]
reading_time: 23
upvotes: 9
comments: 0
language: en
---

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# OAuth 2.0 authorization in PostgreSQL using Keycloak as an example

**[habr](https://daily.dev/sources/habr)** · 23 min read · 9 upvotes · 0 comments

## Summary

OAuth 2.0 Device Authorization Flow enables PostgreSQL to authenticate users through external identity providers like Keycloak, replacing traditional password-based authentication with centralized access control. The implementation involves configuring Keycloak realms and clients, setting up PostgreSQL configuration files (postgresql.conf, pg_hba.conf, pg_ident.conf), and writing a custom token validator in C that verifies JWT tokens by checking scopes and user identifiers. This approach is particularly useful for cloud environments and microservices architectures where centralized identity management and SSO are required.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://habr.com/en/companies/tantor/articles/959776/>

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---

Tags: [#security](https://daily.dev/tags/security), [#infrastructure](https://daily.dev/tags/infrastructure), [#authentication](https://daily.dev/tags/authentication), [#postgresql](https://daily.dev/tags/postgresql), [#oauth](https://daily.dev/tags/oauth)

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