External Authentication

name: inverse
layout: true
class: center, middle, inverse

</span></div>

</span></div>

---

# External Authentication

<div class="contributors-line">
		
	
<ul class="text-list">
			
			<li>
				
  <a href="/training-material/hall-of-fame/martenson/" class="contributor-badge contributor-martenson"><img src="/training-material/assets/images/orcid.png" alt="orcid logo" width="36" height="36"/><img src="https://avatars.githubusercontent.com/martenson?s=36" alt="Martin Čech avatar" width="36" class="avatar" />
    Martin Čech</a>
  
			<li>
				
  <a href="/training-material/hall-of-fame/nsoranzo/" class="contributor-badge contributor-nsoranzo"><img src="/training-material/assets/images/orcid.png" alt="orcid logo" width="36" height="36"/><img src="https://avatars.githubusercontent.com/nsoranzo?s=36" alt="Nicola Soranzo avatar" width="36" class="avatar" />
    Nicola Soranzo</a>
  </li>
</ul>

</div>

<div class="footnote" style="bottom: 8em;">
  <i class="far fa-calendar" aria-hidden="true"></i><span class="visually-hidden">last_modification</span> Updated:   
  <i class="fas fa-fingerprint" aria-hidden="true"></i><span class="visually-hidden">purl</span><abbr title="Persistent URL">PURL</abbr>: <a href="https://gxy.io/GTN:S00010">gxy.io/GTN:S00010</a>
</div>

<div class="footnote" style="bottom: 5em;">

<i class="fas fa-file-alt" aria-hidden="true"></i><span class="visually-hidden">text-document</span><a href="slides-plain.html"> Plain-text slides</a> |

</div>

<div class="footnote" style="bottom: 2em;">
    <strong>Tip: </strong>press <kbd>P</kbd> to view the presenter notes
    | <i class="fa fa-arrows" aria-hidden="true"></i><span class="visually-hidden">arrow-keys</span> Use arrow keys to move between slides

</div>

???
Presenter notes contain extra information which might be useful if you intend to use these slides for teaching.

Press `P` again to switch presenter notes off

Press `C` to create a new window where the same presentation will be displayed.
This window is linked to the main window. Changing slides on one will cause the
slide to change on the other.

Useful when presenting.

---

### <i class="far fa-question-circle" aria-hidden="true"></i><span class="visually-hidden">question</span> Questions

- How can I connect Galaxy with CAS, SAML, etc.

---

### <i class="fas fa-bullseye" aria-hidden="true"></i><span class="visually-hidden">objectives</span> Objectives

- be familiar with configuring Galaxy to use an upstream (proxy) authentication provider

- be able to log in to your Galaxy server with a file-configured user.

---

# Auth Mechanisms supported

* Galaxy-specific account database
* HTTP remote user provided by a reverse proxy server
* Galaxy authentication framework (LDAP/AD, PAM)

---
# Galaxy account

* Stored in the Galaxy DB
  * Unique in both email and username
  * Passwords hashed and salted, using PBKDF2 (default)
  * Table `galaxy_user`
  * Abstracted as `User` in `lib/galaxy/model/mapping.py`
* Session cookie expires after 3 months
  * Configurable with `session_duration`
* Password reset uses 'visit-link' mechanism
* `require_login` can be set to disable anonymous access

---
# Authentication tweaks

In `galaxy.yml`:
* Activation
  * `user_activation_on` will prevent accounts from running jobs until they visit activation link
  * `activation_grace_period` gives users some time before their jobs are ignored
  * `inactivity_box_content` defines the message shown to inactive users
* Expiration
  * `password_expiration_period` forces users to change password
* Disposable domain blacklist
  * `blacklist_file` defines domains (e.g. `example.org`) that will be rejected as user emails

???
https://github.com/martenson/disposable-email-domains

---
# Reverse proxy

In `galaxy.yml`:
* Set `use_remote_user: true` to delegate authentication to the upstream proxy server
  * The proxy server should set the `REMOTE_USER` HTTP header
  * Disables regular logins

Dedicated Galaxy external auth [documentation](https://docs.galaxyproject.org/en/master/admin/authentication.html#remote-user-authentication).

---
# General configuration

* If the proxy server returns only usernames, set `remote_user_maildomain` to a default mail domain to be appended
* If a client can bypass the proxy, it can impersonate any user by forging the `REMOTE_USER` HTTP header:
    * Configure the proxy server to define a `GX_SECRET` header and set `remote_user_secret` to the same value
* Set `remote_user_logout_href` to point to your logout URL

---
# Nginx

* Modules exist for PAM, Kerberos and LDAP.
* Most likely you'll need to recompile Nginx as none of them are included by default.

---
# Example PAM stack

* You need to set up your system's PAM stack (very site-specific)
* A PAM configuration that would be suitable for authentication with Kerberos (placed in `/etc/pam.d/nginx`) might look like:
  ```
  auth  [success=1 default=ignore]  pam_krb5.so minimum_uid=1000 ignore_k5login
  auth  requisite                   pam_deny.so
  auth  required                    pam_permit.so
  ```

---
# Example nginx.conf

```ini
location / {
    auth_pam "Basic Auth Realm Name";
    auth_pam_service_name "nginx";
    ...
    proxy_set_header REMOTE_USER $remote_user;
}
```

The value of `auth_pam_service_name` must match the filename of the pam configuration you created in `/etc/pam.d/` .

Dedicated Galaxy with Nginx [documentation](https://galaxyproject.org/admin/config/nginx-external-user-auth/).

---
# Apache httpd

The authentication module (basic authentication, `mod_auth_kerb`, `mod_authnz_ldap`, `mod_auth_cas`, `Cosign`, etc.) is responsible for providing a username, which we will pass through the proxy to Galaxy as `$REMOTE_USER`.

In addition to the modules above, `mod_headers` must be enabled in the Apache config, for some types of authentication.

Dedicated Galaxy with Apache [documentation](https://galaxyproject.org/admin/config/apache-external-user-auth/).

---
# Galaxy Authentication Framework

Authenticate to external services directly in Galaxy

Available [provider modules](https://github.com/galaxyproject/galaxy/tree/dev/lib/galaxy/auth/providers) for:
- Local Galaxy DB (default)
- LDAP/Active Directory
- [System (Linux) PAM](http://www.linux-pam.org/)

---
### <i class="fas fa-key" aria-hidden="true"></i><span class="visually-hidden">keypoints</span> Key points

- Remote auth is not complex to set up and can help you meet institutional requirements

---

## Thank You!

This material is the result of a collaborative work. Thanks to the [Galaxy Training Network](https://training.galaxyproject.org) and all the contributors!

<div class="contributors-line">
		
<table class="contributions">
	
	<tr>
		<td><abbr title="These people wrote the bulk of the tutorial, they may have done the analysis, built the workflow, and wrote the text themselves.">Author(s)</abbr></td>
		<td>
			
  <a href="/training-material/hall-of-fame/martenson/" class="contributor-badge contributor-martenson"><img src="/training-material/assets/images/orcid.png" alt="orcid logo" width="36" height="36"/><img src="https://avatars.githubusercontent.com/martenson?s=36" alt="Martin Čech avatar" width="36" class="avatar" />
    Martin Čech</a>
  
  <a href="/training-material/hall-of-fame/nsoranzo/" class="contributor-badge contributor-nsoranzo"><img src="/training-material/assets/images/orcid.png" alt="orcid logo" width="36" height="36"/><img src="https://avatars.githubusercontent.com/nsoranzo?s=36" alt="Nicola Soranzo avatar" width="36" class="avatar" />
    Nicola Soranzo</a>
  
		</td>
	</tr>

<tr class="reviewers">
		<td><abbr title="These people reviewed this material for accuracy and correctness">Reviewers</abbr></td>
		<td>
			
  <a href="/training-material/hall-of-fame/slugger70/" class="contributor-badge contributor-slugger70">
    <img src="https://avatars.githubusercontent.com/slugger70?s=36" alt="Simon Gladman avatar" width="36" class="avatar" />
  </a>
  
  <a href="/training-material/hall-of-fame/nsoranzo/" class="contributor-badge contributor-nsoranzo">
    <img src="https://avatars.githubusercontent.com/nsoranzo?s=36" alt="Nicola Soranzo avatar" width="36" class="avatar" />
  </a>
  
  <a href="/training-material/hall-of-fame/hexylena/" class="contributor-badge contributor-hexylena">
    <img src="https://avatars.githubusercontent.com/hexylena?s=36" alt="Helena Rasche avatar" width="36" class="avatar" />
  </a>
  
  <a href="/training-material/hall-of-fame/martenson/" class="contributor-badge contributor-martenson">
    <img src="https://avatars.githubusercontent.com/martenson?s=36" alt="Martin Čech avatar" width="36" class="avatar" />
  </a>
  
  <a href="/training-material/hall-of-fame/shiltemann/" class="contributor-badge contributor-shiltemann">
    <img src="https://avatars.githubusercontent.com/shiltemann?s=36" alt="Saskia Hiltemann avatar" width="36" class="avatar" />
  </a>
  
  <a href="/training-material/hall-of-fame/natefoo/" class="contributor-badge contributor-natefoo">
    <img src="https://avatars.githubusercontent.com/natefoo?s=36" alt="Nate Coraor avatar" width="36" class="avatar" />
  </a>
  </td>
	</tr>

</table>

</div>

</div>

Tutorial Content is licensed under <a rel="license" href="http://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0 International License</a>.<br/>