External Authentication

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

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# External Authentication

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			<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>
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				<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>
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---

### <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

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# 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!

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	<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>

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		<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-badge-small 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-badge-small 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-badge-small 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-badge-small 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-badge-small 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-badge-small contributor-natefoo"><img src="https://avatars.githubusercontent.com/natefoo?s=36" alt="Nate Coraor avatar" width="36" class="avatar" /></a></td>
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