Oauth2 Authorization Server

🚀 OAuth2 and Spring Boot 3: A Starter Guide to Spring Authorization Server with Database-Persisted Login Data

This guide provides an in - depth understanding of building an OAuth2 - based authorization server using Spring Boot 3, with user login data stored in a database.

📚 Content Overview

• OAuth2 Protocol: Understand the basic concepts, workflows, and applications of OAuth2 in modern authentication systems.
• Spring Security: Learn how to use Spring Security to implement secure authentication and authorization mechanisms.
• Database Integration: Persist user login data in a database to ensure system security and reliability.
• Practical Operations: Through specific steps, learn to build an OAuth2 - based authorization server from scratch.

📑 Reference Materials

• [Spring Boot 3 Security Tutorial: Saving Login Data with OAuth2 and Spring Authorization Server](https://www.youtube.com/watch?v=rVAqh - VDw2o)
• [BCryptPasswordEncoder Test Cases](https://github.com/spring - projects/spring - security/blob/main/crypto/src/test/java/org/springframework/security/crypto/bcrypt/BCryptPasswordEncoderTests.java)

🚀 Native Image Building with Spring Boot 3 and GraalVM JDK 24

This section focuses on building native images using Spring Boot 3 and GraalVM JDK 24, along with security enhancements using the Grype tool.

📚 Content Overview

• AOT (Ahead - of - Time) Compilation: Understand the AOT features introduced by Spring Boot 3 and their advantages.
• GraalVM JDK 24: Learn how to use GraalVM to compile Java applications into high - performance native images.
• Grype Tool: Use Grype to scan for vulnerabilities in container images and file systems, enhancing security.

🛠️ Steps

1. Configure Docker Desktop to enable the "Host - side TCP support" feature:
   • Open Docker Desktop settings, go to "Experimental features" -> "Enable developer mode options" -> Enable "Host - side TCP support" and restart.
2. Download and run the AI model:

   docker model pull ai/gemma3:4B - Q4_K_M
   docker model run ai/gemma3:4B - Q4_K_M
   

📑 Reference Materials

• [Welcome to GraalVM JDK 24! 🚀](https://medium.com/graalvm/welcome - graalvm - for - jdk - 24 - 7c829fe98ea1)
• [How to Generate Native Images with Spring Boot 3 and GraalVM](https://www.youtube.com/watch?v=FjRBHKUP - NA)

🚀 Running AI Models Locally with Docker Desktop Model Runner

This part explains how to use Docker Desktop's new feature to run AI models locally and introduces the MCP protocol.

📚 Content Overview

• Docker Desktop Model Runner: Learn how to use the latest features of Docker Desktop to run AI models locally.
• MCP Protocol: Understand the basic concepts of the Model Context Protocol (MCP) and its applications in AI models.

🛠️ Steps

1. Install and configure Docker Desktop:
   • Open Docker Desktop settings, go to "Experimental features" -> "Enable developer mode options" -> Enable "Host - side TCP support" and restart.
2. Download and run the AI model:

   docker model pull ai/gemma3:4B - Q4_K_M
   docker model run ai/gemma3:4B - Q4_K_M
   

📑 Reference Materials

• [Docker Desktop Model Runner Documentation](https://docs.docker.com/desktop/features/model - runner/)
• How to Interact with AI Models Using the MCP Protocol

🚀 Building an Authorization Server with Spring Boot and OAuth2

This guide is about building an authorization server using Spring Boot and OAuth2, covering key concepts and implementation steps.

📚 Content Overview

• OAuth2 Protocol: Understand the basic concepts, workflows, and applications of OAuth2 in modern authentication systems.
• Spring Security: Learn how to use Spring Security to implement secure authentication and authorization mechanisms.
• Database Integration: Persist user login data in a database to ensure system security and reliability.

🛠️ Steps

1. Create a Spring Boot project and add dependencies:

   <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring - boot - starter - oauth2</artifactId>
   </dependency>
   

2. Configure the OAuth2 authorization server:
   • Configure the application.properties file to enable OAuth2 functionality.
   • Implement a custom UserDetailsService to retrieve user information from the database.

📑 Reference Materials

• [Spring Boot OAuth2 Starter Tutorial](https://www.baeldung.com/spring - security - oauth2)
• [How to Build an Authorization Service with Spring Authorization Server](https://spring.io/blog/2021/06/28/spring - authorization - server)

🚀 Scanning Container Image Vulnerabilities with Grype

This section focuses on using the Grype tool to scan for vulnerabilities in container images.

📚 Content Overview

• Grype Tool: Understand the basic functions of Grype and its applications in container security.
• Vulnerability Scanning: Learn how to use Grype to scan for known vulnerabilities in Docker images and file systems.

🛠️ Steps

1. Install and configure Grype:

   go install github.com/anchore/grype/cmd/grype@latest
   

2. Scan a Docker image:

   grype --image your_docker_image_name
   

📑 Reference Materials

• [How to Scan Container Vulnerabilities with Grype](https://docs.grype.dev/get - started)
• Grype Official Documentation