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TS29222_AEF_Security_API/aef_security/data/

TS29222_AEF_Security_API/aef_security/certs/

TS29222_AEF_Security_API/aef_security/provider/

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# Provider Psk Cli

# PSK Demo Client

This repository contains a demo implementation of an **AEF Security API client** specified by **3GPP**, extended with additional endpoints to demonstrate the use of **PSK (Pre-Shared Key)** authentication in combination with **OpenCAPIF**.  

The client runs inside a Docker container, can be managed with helper scripts, and comes with **Postman collections** and a **Python script** to reproduce the complete flow: from user onboarding in OpenCAPIF, to Invoker registration, API publishing, discovery, security context creation, and final consumption of the service using PSK.  

---

## Getting started

## Running the Client

To make it easy for you to get started with GitLab, here's a list of recommended next steps.

### Scripts

- `./run.sh` → Start the Docker container with the client.  

- `./remove_information.sh` → Delete all information stored by the client.  

- `./show_logs.sh` → Show the logs of the running client.  

- `./clean.sh` → Remove the client container.  

Already a pro? Just edit this README.md and make it your own. Want to make it easy? [Use the template at the bottom](#editing-this-readme)!

---

## Add your files

## Postman Collection

- [ ] [Create](https://docs.gitlab.com/ee/user/project/repository/web_editor.html#create-a-file) or [upload](https://docs.gitlab.com/ee/user/project/repository/web_editor.html#upload-a-file) files

- [ ] [Add files using the command line](https://docs.gitlab.com/topics/git/add_files/#add-files-to-a-git-repository) or push an existing Git repository with the following command:

In the folder **`client_psk_demo/postman/`**, you will find:  

- `CAPIF ENVIRONMENTS PSK Demo.postman_environment.json` → Environment variables for the demo.  

- `CAPIF PSK Demo.postman_collection.json` → Postman collection with the required requests.  

```

cd existing_repo

git remote add origin https://labs.etsi.org/rep/ocf/example-clients/provider-psk-cli.git

git branch -M main

git push -uf origin main

```

---

## Integrate with your tools

## Demo Flow (Postman + Python)

- [ ] [Set up project integrations](https://labs.etsi.org/rep/ocf/example-clients/provider-psk-cli/-/settings/integrations)

The Postman collection defines the following sequence:  

## Collaborate with your team

1. **Login as Admin** → The administrator logs in and obtains the token needed to manage users in OpenCAPIF.  

- [ ] [Invite team members and collaborators](https://docs.gitlab.com/ee/user/project/members/)

- [ ] [Create a new merge request](https://docs.gitlab.com/ee/user/project/merge_requests/creating_merge_requests.html)

- [ ] [Automatically close issues from merge requests](https://docs.gitlab.com/ee/user/project/issues/managing_issues.html#closing-issues-automatically)

- [ ] [Enable merge request approvals](https://docs.gitlab.com/ee/user/project/merge_requests/approvals/)

- [ ] [Set auto-merge](https://docs.gitlab.com/user/project/merge_requests/auto_merge/)

2. **Create User** → The administrator creates a new OpenCAPIF user account.  

## Test and Deploy

3. **User Authentication** → The user logs in with their credentials.  

   - At this step, the user obtains:  

     - A **token** that allows the creation of an Invoker in OpenCAPIF.  

     - The **CA certificate** used later for TLS.  

     - The URLs for onboarding, publishing, discovering, and security APIs.  

   - The CA certificate is stored locally for later use.  

Use the built-in continuous integration in GitLab.

4. **Onboard Invoker** → The user registers an Invoker in OpenCAPIF.  

   - A CSR (Certificate Signing Request) is generated.  

   - As a result of onboarding, the Invoker receives:  

     - A **certificate** issued by CAPIF.  

     - An **Invoker ID** that uniquely identifies it.  

- [ ] [Get started with GitLab CI/CD](https://docs.gitlab.com/ee/ci/quick_start/)

- [ ] [Analyze your code for known vulnerabilities with Static Application Security Testing (SAST)](https://docs.gitlab.com/ee/user/application_security/sast/)

- [ ] [Deploy to Kubernetes, Amazon EC2, or Amazon ECS using Auto Deploy](https://docs.gitlab.com/ee/topics/autodevops/requirements.html)

- [ ] [Use pull-based deployments for improved Kubernetes management](https://docs.gitlab.com/ee/user/clusters/agent/)

- [ ] [Set up protected environments](https://docs.gitlab.com/ee/ci/environments/protected_environments.html)

5. **Discover Before Publish** → The Invoker queries CAPIF to check if there are any APIs available. At this stage, none should be visible.  

***

6. **Start Client with PSK** → The client is initialized, a provider is registered, and the PSK-secured API is published.  

   - Requires the username and password of the created OpenCAPIF user.  

# Editing this README

7. **Discover After Publish** → The Invoker queries CAPIF again and now discovers the API published by the client.  

When you're ready to make this README your own, just edit this file and use the handy template below (or feel free to structure it however you want - this is just a starting point!). Thanks to [makeareadme.com](https://www.makeareadme.com/) for this template.

8. **Security Context Setup (Python script)**  

   - Run `invoker_psk.py` to create a **security context** in OpenCAPIF and derive the PSK.  

   - The script retrieves:  

     - Session ID  

     - Master Key (from TLS session)  

     - API Interface Information  

   - Usage:  

     ```bash

     python3 invoker_psk.py \

       --invoker-id INV8c7450a4f43f49c32c932d370ea96b \

       --aef-id AEF07b8e9d400136f82ad0ad42ed9beea \

       --api-id ece13577ea0ed4448e15b9e8858744

     ```  

   - Returns the **derived PSK** for the Invoker.  

## Suggestions for a good README

9. **Check Authentication** → The Invoker calls `/check-authentication` to verify if it has permission to consume the API.  

Every project is different, so consider which of these sections apply to yours. The sections used in the template are suggestions for most open source projects. Also keep in mind that while a README can be too long and detailed, too long is better than too short. If you think your README is too long, consider utilizing another form of documentation rather than cutting out information.

10. **Get Information** → The Invoker calls `/information` using the derived PSK to consume the API.  

## Name

Choose a self-explaining name for your project.

11. **Negative Test** → A call to `/information` is attempted with an invalid certificate, which must fail.  

## Description

Let people know what your project can do specifically. Provide context and add a link to any reference visitors might be unfamiliar with. A list of Features or a Background subsection can also be added here. If there are alternatives to your project, this is a good place to list differentiating factors.

---

## Badges

On some READMEs, you may see small images that convey metadata, such as whether or not all the tests are passing for the project. You can use Shields to add some to your README. Many services also have instructions for adding a badge.

## Endpoints Exposed by the Client

## Visuals

Depending on what you are making, it can be a good idea to include screenshots or even a video (you'll frequently see GIFs rather than actual videos). Tools like ttygif can help, but check out Asciinema for a more sophisticated method.

- **AEF_Security_API (3GPP defined):**  

  - `POST /revoke-authorization` → Deletes the **security context** of an Invoker.  

  - `POST /check-authentication` → Verifies whether an Invoker can access the API.  

## Installation

Within a particular ecosystem, there may be a common way of installing things, such as using Yarn, NuGet, or Homebrew. However, consider the possibility that whoever is reading your README is a novice and would like more guidance. Listing specific steps helps remove ambiguity and gets people to using your project as quickly as possible. If it only runs in a specific context like a particular programming language version or operating system or has dependencies that have to be installed manually, also add a Requirements subsection.

- **Custom Demo Endpoints:**  

  - `GET /information` → Requires PSK, test endpoint for API consumption.  

  - `POST /start-client-psk` → Registers provider and publishes the service using OpenCAPIF SDK.  

## Usage

Use examples liberally, and show the expected output if you can. It's helpful to have inline the smallest example of usage that you can demonstrate, while providing links to more sophisticated examples if they are too long to reasonably include in the README.

---

## Support

Tell people where they can go to for help. It can be any combination of an issue tracker, a chat room, an email address, etc.

## Example: Run Invoker PSK Script

## Roadmap

If you have ideas for releases in the future, it is a good idea to list them in the README.

After discovering the API and obtaining the required IDs, run the Python script to create the security context and derive the PSK:

## Contributing

State if you are open to contributions and what your requirements are for accepting them.

```bash

python3 invoker_psk.py \

  --invoker-id INV8c7450a4f43f49c32c932d370ea96b \

  --aef-id AEF07b8e9d400136f82ad0ad42ed9beea \

  --api-id ece13577ea0ed4448e15b9e8858744

```

For people who want to make changes to your project, it's helpful to have some documentation on how to get started. Perhaps there is a script that they should run or some environment variables that they need to set. Make these steps explicit. These instructions could also be useful to your future self.

---

You can also document commands to lint the code or run tests. These steps help to ensure high code quality and reduce the likelihood that the changes inadvertently break something. Having instructions for running tests is especially helpful if it requires external setup, such as starting a Selenium server for testing in a browser.

### Example Output

## Authors and acknowledgment

Show your appreciation to those who have contributed to the project.

```

Session ID: 4dec12e7d8ded798ee3d74f12aabd8ef2fbbf633bf8316a049d7360d6cf277e5

Master Key: 6009d87880327e18f1eefb0c3879e522932d2707bc94ff68694e70dab329b407ad0fbbc5e95aba4e99cea704b3c70fa

Interface Information: client-psk.org:8443

Interface Info: client-psk.org:8443

...

## License

For open source projects, say how it is licensed.

Derive the PSK using HMAC with SHA-256:

PSK: 1a8d8ba893ac4de00081e115d2006dbb86d507042dab2ed02cc59964a831c

```

## Project status

If you have run out of energy or time for your project, put a note at the top of the README saying that development has slowed down or stopped completely. Someone may choose to fork your project or volunteer to step in as a maintainer or owner, allowing your project to keep going. You can also make an explicit request for maintainers.

The script shows all intermediate steps (Session ID, Master Key, Interface Info, and HMAC calculation) and finally outputs the **PSK** that must be used when the Invoker consumes the `/information` endpoint.  

---

## Requirements

To run this demo you need:  

- An **instance of OpenCAPIF** to connect to.  

- Docker  

- Postman  

- Python 3.x (for `invoker_psk.py`)  

- **Node.js helper script** for Postman provided by ETSI, available here:  

  👉 https://ocf.etsi.org/documentation/develop/testing/postman/  

  This script is required to handle CSR generation and certificate management during the onboarding process.  

- Add the following hostname to your `/etc/hosts`:  

  ```

  127.0.0.1 client-psk.org

  ```  

  This is needed so the client can be reached using the domain `client-psk.org`.  

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