454 lines
21 KiB
Markdown
454 lines
21 KiB
Markdown
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<table>
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<tr>
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<td><a href="https://medium.com/@bohou/secure-your-nodejs-server-with-letsencrypt-for-free-f8925742faa9" target="_blank"><img src="https://git.rootprojects.org/root/greenlock.js/raw/branch/master/logo/ibm-301x112.png"></a></td>
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<td><a href="https://github.com/mozilla-iot/le-store-certbot/issues/4" target="_blank"><img src="https://git.rootprojects.org/root/greenlock.js/raw/branch/master/logo/mozilla-iot-301x112.png"></a></td>
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<td><a href="https://github.com/digitalbazaar/bedrock-letsencrypt" target="_blank"><img src="https://git.rootprojects.org/root/greenlock.js/raw/branch/master/logo/digital-bazaar-301x112.png"></a></td>
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</tr>
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</table>
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<table>
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<tr>
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<td><a href="https://github.com/beakerbrowser/homebase" target="_blank"><img src="https://git.rootprojects.org/root/greenlock.js/raw/branch/master/logo/beaker-browser-301x112.png"></a></td>
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<td><a href="https://telebit.cloud" target="_blank"><img src="https://git.rootprojects.org/root/greenlock.js/raw/branch/master/logo/telebit-301x112.png"></a></td>
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<td><a href="https://rootprojects.org" target="_blank"><img src="https://git.rootprojects.org/root/greenlock.js/raw/branch/master/logo/ppl-301x112.png"></a></td>
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</tr>
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</table>
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# [Greenlock](https://git.rootprojects.org/root/greenlock-express.js)™ for Express.js
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<small>formerly letsencrypt-express</small>
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Free SSL, Free Wildcard SSL, and Fully Automated HTTPS made dead simple<br>
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<small>certificates issued by Let's Encrypt v2 via [ACME](https://git.rootprojects.org/root/acme-v2.js)</small>
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<a href="https://twitter.com/intent/follow?screen_name=GreenlockHTTPS"><img src="https://img.shields.io/twitter/url/http/shields.io.svg?style=social&label=Follow%20@GreenlockHTTPS" title="Follow @GreenlockHTTPS on Twitter" alt="Twitter Badge"></a>
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| A [Root](https://rootprojects.org) Project |
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[Greenlock™](https://git.rootprojects.org/root/greenlock.js) is for
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[Web Servers](https://git.rootprojects.org/root/greenlock-cli.js),
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[Web Browsers](https://greenlock.domains),
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and **node.js middleware systems**.
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# Features
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- [x] Automatic HTTPS
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- [x] Free SSL
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- [x] Free Wildcard SSL
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- [x] Multiple domain support (up to 100 altnames per SAN)
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- [x] Dynamic Virtual Hosting (vhost)
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- [x] Automatical renewal (10 to 14 days before expiration)
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- [x] Great ACME support
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- [x] ACME draft 11
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- [x] Let's Encrypt v2
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- [x] Let's Encrypt v1
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- [x] Full node.js support
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- [x] core https module
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- [x] Express.js
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- [x] [Koa](https://git.rootprojects.org/root/greenlock-koa.js)
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- [x] [hapi](https://git.rootprojects.org/root/greenlock-hapi.js)
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- [x] Extensible Plugin Support
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- [x] AWS (S3, Route53)
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- [x] Azure
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- [x] CloudFlare
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- [x] Consul
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- [x] Digital Ocean
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- [x] etcd
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- [x] Redis
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# Install
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```bash
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npm install --save greenlock-express@2.x
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```
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# QuickStart
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<!-- TODO better quickstart (fewer options) -->
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### Screencast
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Watch the QuickStart demonstration: [https://youtu.be/e8vaR4CEZ5s](https://youtu.be/e8vaR4CEZ5s&list=PLZaEVINf2Bq_lrS-OOzTUJB4q3HxarlXk)
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<a href="https://www.youtube.com/watch?v=e8vaR4CEZ5s&list=PLZaEVINf2Bq_lrS-OOzTUJB4q3HxarlXk"><img src="https://i.imgur.com/Y8ix6Ts.png" title="QuickStart Video" alt="YouTube Video Preview" /></a>
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* [0:00](https://www.youtube.com/watch?v=e8vaR4CEZ5s&list=PLZaEVINf2Bq_lrS-OOzTUJB4q3HxarlXk#t=0) - Intro
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* [2:22](https://www.youtube.com/watch?v=e8vaR4CEZ5s&list=PLZaEVINf2Bq_lrS-OOzTUJB4q3HxarlXk#t=142) - Demonstrating QuickStart Example
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* [6:37](https://www.youtube.com/watch?v=e8vaR4CEZ5s&list=PLZaEVINf2Bq_lrS-OOzTUJB4q3HxarlXk?t=397) - Troubleshooting / Gotchas
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#### Beyond the QuickStart (Part 2)
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* [1:00](https://www.youtube.com/watch?v=bTEn93gxY50&index=2&list=PLZaEVINf2Bq_lrS-OOzTUJB4q3HxarlXk&t=60) - Bringing Greenlock into an Existing Express Project
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* [2:26](https://www.youtube.com/watch?v=bTEn93gxY50&index=2&list=PLZaEVINf2Bq_lrS-OOzTUJB4q3HxarlXk&t=146) - The `approveDomains` callback
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#### Security Concerns (Part 3)
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* [0:00](https://www.youtube.com/watch?v=aZgVqPzoZTY&index=3&list=PLZaEVINf2Bq_lrS-OOzTUJB4q3HxarlXk) - Potential Attacks, and Mitigation
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### Working Example Code
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Here's a completely working example that will get you started.
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```
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git clone https://git.rootprojects.org/root/greenlock-express.js.git
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pushd greenlock-express.js
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npm install
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popd
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# edit 'email' and 'approveDomains' in
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# greenlock-express.js/examples/simple.js
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node greenlock-express.js/examples/simple.js
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```
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All you have to do is start the webserver and then visit it at its domain name.
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`server.js`:
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```javascript
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'use strict';
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require('greenlock-express').create({
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email: 'john.doe@example.com' // The email address of the ACME user / hosting provider
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, agreeTos: true // You must accept the ToS as the host which handles the certs
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, configDir: '~/.config/acme/' // Writable directory where certs will be saved
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, communityMember: true // Join the community to get notified of important updates
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, telemetry: true // Contribute telemetry data to the project
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// Using your express app:
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// simply export it as-is, then include it here
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, app: require('./app.js')
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//, debug: true
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}).listen(80, 443);
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```
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`app.js`:
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```js
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'use strict';
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var express = require('express');
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var app = express();
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app.use('/', function (req, res) {
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res.setHeader('Content-Type', 'text/html; charset=utf-8')
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res.end('Hello, World!\n\n💚 🔒.js');
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})
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// Don't do this:
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// app.listen(3000)
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// Do this instead:
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module.exports = app;
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```
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### `communityMember`
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If you're the kind of person that likes the kinds of stuff that I do,
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well, I want to do more of it and I'd like to get you involved.
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As expected, by default we keep your email private and only use it for
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transactional messaging, urgent security or API updates
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(such as the mandatory upgrade to Let's Encrypt v2), and ACME account registration.
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However, when you set the `communityMember` option to `true` we'll also
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inform you when there are meaningful and relavant feature updates (no bugfix noise),
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and give you early access to similar projects.
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You can see our full privacy policy at <https://greenlock.domains/legal/#privacy>.
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### What if the example didn't work?
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Double check the following:
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* **Public Facing IP** for `http-01` challenges
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* Are you running this *as* a public-facing webserver (good)? or localhost (bad)?
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* Does `ifconfig` show a public address (good)? or a private one - 10.x, 192.168.x, etc (bad)?
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* If you're on a non-public server, are you using the `dns-01` challenge?
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* **correct ACME version**
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* Let's Encrypt **v2** (ACME v2) must use `version: 'draft-11'`
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* Let's Encrypt v1 must use `version: 'v01'`
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* **valid email**
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* You MUST set `email` to a **valid address**
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* MX records must validate (`dig MX example.com` for `'john@example.com'`)
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* **valid DNS records**
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* Must have public DNS records (test with `dig +trace A example.com; dig +trace www.example.com` for `[ 'example.com', 'www.example.com' ]`)
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* **write access**
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* You MUST set `configDir` to a writeable location (test with `touch ~/acme/etc/tmp.tmp`)
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* **port binding privileges**
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* You MUST be able to bind to ports 80 and 443
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* You can do this via `sudo` or [`setcap`](https://gist.github.com/firstdoit/6389682)
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* **API limits**
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* You MUST NOT exceed the API [**usage limits**](https://letsencrypt.org/docs/staging-environment/) per domain, certificate, IP address, etc
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* **Red Lock, Untrusted**
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* You MUST use the **production** server url, not staging
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* The API URL should not have 'acme-staging-v02', but should have 'acme-v02'
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* Delete the `configDir` used for getting certificates in staging
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### Production vs Staging
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If at first you don't succeed, stop and switch to staging.
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There are a number of common problems related to system configuration -
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firewalls, ports, permissions, etc - that you are likely to run up against
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when using greenlock for your first time.
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I've put a "dry run" in place with built-in diagnostics, so hopefully
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you get everything right on your first or second try.
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However, in order to avoid being blocked by hitting the bad request rate limits
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you should switch to using the `staging` server for any testing or debugging.
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```
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https://acme-staging-v02.api.letsencrypt.org/directory
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```
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## Working Examples
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| Example | Location + Description |
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|:---------------:|:---------:|
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| **QuickStart** | [examples/quickstart.js](https://git.rootprojects.org/root/greenlock-express.js/src/branch/master/examples/quickstart.js) uses the fewest options and accepts all default settings. It's guaranteed to work for you. |
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| Production | [examples/production.js](https://git.rootprojects.org/root/greenlock-express.js/src/branch/master/examples/production.js) shows how to require an express app (or other middleware system), expand the `approveDomains` callback, provides an example database shim, and exposes the server instance. |
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| Virtual Hosting | [examples/vhost.js](https://git.rootprojects.org/root/greenlock-express.js/src/branch/master/examples/vhost.js) shows how to dynamically secure and serve domains based on their existance on the file system. |
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| Wildcard Domains | [examples/wildcard.js](https://git.rootprojects.org/root/greenlock-express.js/src/branch/master/examples/wildcard.js) shows how to use the `greenlock-challenge-dns` and wildcard cetificates. |
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| HTTPS (raw) | [examples/spdy.js](https://git.rootprojects.org/root/greenlock-express.js/src/branch/master/examples/spdy.js) demonstrates how to manually configure a node web server using the node's built-in `http` and `https` modules. |
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| HTTP2 (spdy) | Presently spdy is incompatible with node v11, but [examples/spdy.js](https://git.rootprojects.org/root/greenlock-express.js/src/branch/master/examples/spdy.js) demonstrates how to manually configure a node web server with spdy-compatible versions of node and Greenlock. |
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| HTTP2 (node) | [examples/http2.js](https://git.rootprojects.org/root/greenlock-express.js/src/branch/master/examples/http2.js) uses node's new HTTP2 module, which is NOT compatible with the existing middleware systems (and is not "stable" as of v10.0). |
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| WebSockets (ws) | [examples/websockets.js](https://git.rootprojects.org/root/greenlock-express.js/src/branch/master/examples/websockets.js) demonstrates how to use Greenlock express with a websocket server. |
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| socket.io | [examples/socket.io.js](https://git.rootprojects.org/root/greenlock-express.js/src/branch/master/examples/socket.io.js) demonstrates how to use Greenlock express with socket.io (even though `ws` is far simpler, faster, and better and every way). |
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| - | Build Your Own <br> Be sure to tell me ([@coolaj86](https://twitter.com/@coolaj86)) / us ([@GreenlockHTTPS](https://twitter.com/@GreenlockHTTPS)) about it. :) |
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| Full List | Check out the [examples/](https://git.rootprojects.org/root/greenlock-express.js/src/branch/master/examples) directory |
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# Plugins
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**IMPORTANT**: Community plugins may or may not be maintained and working. Please try with the defaults before switching to community plugins.
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## HTTP-01 Challenges
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| | Plugin |
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|:--------------:|:---------:|
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| **Default (fs)** | [acme-http-01-cli](https://git.rootprojects.org/root/acme-http-01-cli.js) |
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| AWS S3 | [acme-http-01-s3](https://git.rootprojects.org/root/acme-http-01-s3.js) |
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| Azure | [kolarcz/node-le-challenge-azure-storage](https://github.com/kolarcz/node-le-challenge-azure-storage) |
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| - | Build Your Own <br> [greenlock-challenge-test](https://git.rootprojects.org/root/greenlock-challenge-test.js) |
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| Full List | Search [acme-http-01-](https://www.npmjs.com/search?q=acme-http-01-) or [le-challenge-](https://www.npmjs.com/search?q=le-challenge-) on npm |
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## DNS-01 Challenges
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| | Plugin |
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|:--------------:|:---------:|
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| **Manual (cli)** | [acme-dns-01-cli](https://git.rootprojects.org/root/acme-dns-01-cli.js) |
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| AWS Route 53 | [thadeetrompetter/le-challenge-route53](https://github.com/thadeetrompetter/le-challenge-route53) |
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| CloudFlare | [buschtoens/le-challenge-cloudflare](https://github.com/buschtoens/le-challenge-cloudflare) |
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| CloudFlare | [llun/le-challenge-cloudflare](https://github.com/llun/le-challenge-cloudflare) |
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| Digital Ocean | [bmv437/le-challenge-digitalocean](https://github.com/bmv437/le-challenge-digitalocean) |
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| etcd | [ceecko/le-challenge-etcd](https://github.com/ceecko/le-challenge-etcd) |
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| - | Build Your Own <br> [greenlock-challenge-test](https://git.rootprojects.org/root/greenlock-challenge-test.js) |
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| Full List | Search [acme-dns-01-](https://www.npmjs.com/search?q=acme-dns-01-) or [le-challenge-](https://www.npmjs.com/search?q=le-challenge-) on npm |
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## Account & Certificate Storage
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| | Plugin |
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|:--------------:|:---------:|
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| **Simplest** | [greenlock-store-fs](https://git.rootprojects.org/root/greenlock-store-fs.js) |
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| certbot (v2 default) | [le-store-certbot](https://git.coolaj86.com/coolaj86/le-store-certbot.js) |
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| AWS S3 | [gl-store-s3](https://git.rootprojects.org/root/gl-store-s3.js) |
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| Consul | [sebastian-software/le-store-consul](https://github.com/sebastian-software/le-store-consul) |
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| json (fs) | [paulgrove/le-store-simple-fs](https://github.com/paulgrove/le-store-simple-fs)
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| Redis | [digitalbazaar/le-store-redis](https://github.com/digitalbazaar/le-store-redis) |
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| - | Build Your Own <br> [greenlock-store-test](https://git.rootprojects.org/root/greenlock-store-test.js) |
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| Full List | Search [le-store-](https://www.npmjs.com/search?q=le-store-) on npm |
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## Auto-SNI
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| | Plugin |
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|:-----------:|:---------:|
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| **Default** | [le-sni-auto](https://git.coolaj86.com/coolaj86/le-sni-auto.js) |
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(you probably wouldn't need or want to replace this)
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**Bugs**: Please report bugs with the community plugins to the appropriate owner first, then here if you don't get a response.
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# Usage
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The oversimplified example was the bait
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(because everyone seems to want an example that fits in 3 lines, even if it's terribly bad practices),
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now here's the switch.
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We have another completely working example that will provides a little more to build off of.
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```
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git clone https://git.rootprojects.org/root/greenlock-express.js.git
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pushd greenlock-express.js
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npm install
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popd
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# replace 'fooCheckDb' in
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# greenlock-express.js/examples/normal.js
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node greenlock-express.js/examples/normal.js
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```
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It looks a little more like this:
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`serve.js`:
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```javascript
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'use strict';
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// returns an instance of greenlock.js with additional helper methods
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var glx = require('greenlock-express').create({
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server: 'https://acme-v02.api.letsencrypt.org/directory'
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// Note: If at first you don't succeed, stop and switch to staging:
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// https://acme-staging-v02.api.letsencrypt.org/directory
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, version: 'draft-11' // Let's Encrypt v2 (ACME v2)
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// If you wish to replace the default account and domain key storage plugin
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, store: require('le-store-certbot').create({
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configDir: require('path').join(require('os').homedir(), 'acme', 'etc')
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, webrootPath: '/tmp/acme-challenges'
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})
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// Contribute telemetry data to the project
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, telemetry: true
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// the default servername to use when the client doesn't specify
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// (because some IoT devices don't support servername indication)
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, servername: 'example.com'
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, approveDomains: approveDomains
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});
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var server = glx.listen(80, 443, function () {
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console.log("Listening on port 80 for ACME challenges and 443 for express app.");
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});
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```
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Note: You shouldn't be using the plain HTTP server for anything except, potentially, for error handling
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on the listen event (if the default print-and-quit behavior doesn't work for your use case).
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If you need to do that, here's how:
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```
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var plainServer = server.unencrypted;
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plainServer.on('error', function (err) { ... });
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```
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The Automatic Certificate Issuance is initiated via SNI (`httpsOptions.SNICallback`).
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For security, domain validation MUST have an approval callback in *production*.
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```javascript
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var http01 = require('le-challenge-fs').create({ webrootPath: '/tmp/acme-challenges' });
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function approveDomains(opts, certs, cb) {
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// This is where you check your database and associated
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// email addresses with domains and agreements and such
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// if (!isAllowed(opts.domains)) { return cb(new Error("not allowed")); }
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// The domains being approved for the first time are listed in opts.domains
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// Certs being renewed are listed in certs.altnames (if that's useful)
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// Opt-in to submit stats and get important updates
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opts.communityMember = true;
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// If you wish to replace the default challenge plugin, you may do so here
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opts.challenges = { 'http-01': http01 };
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opts.email = 'john.doe@example.com';
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opts.agreeTos = true;
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// NOTE: you can also change other options such as `challengeType` and `challenge`
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// opts.challengeType = 'http-01';
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// opts.challenge = require('le-challenge-fs').create({});
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cb(null, { options: opts, certs: certs });
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}
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```
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```javascript
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// handles acme-challenge and redirects to https
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require('http').createServer(glx.middleware(require('redirect-https')())).listen(80, function () {
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console.log("Listening for ACME http-01 challenges on", this.address());
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});
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var app = require('express')();
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app.use('/', function (req, res) {
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res.end('Hello, World!');
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});
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// handles your app
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require('https').createServer(glx.httpsOptions, app).listen(443, function () {
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console.log("Listening for ACME tls-sni-01 challenges and serve app on", this.address());
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});
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|
```
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**Security**:
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Greenlock will do a self-check on all domain registrations
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to prevent you from hitting rate limits.
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|
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# API
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|
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This module is an elaborate ruse (to provide an oversimplified example and to nab some SEO).
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|
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The API is actually located at [greenlock.js options](https://git.rootprojects.org/root/greenlock.js)
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(because all options are simply passed through to `greenlock.js` proper without modification).
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|
|
|
The only "API" consists of two options, the rest is just a wrapper around `greenlock.js` to take LOC from 15 to 5:
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|
|
|
* `opts.app` An express app in the format `function (req, res) { ... }` (no `next`).
|
|
* `server = glx.listen(plainAddr, tlsAddr, onListen)` Accepts port numbers (or arrays of port numbers) to listen on, returns secure server.
|
|
* `listen(80, 443)`
|
|
* `listen(80, 443, onListenSecure)`
|
|
* `listen(80, 443, onListenPlain, onListenSecure)`
|
|
* `listen('localhost:80', '0.0.0.0:443')`
|
|
* `listen('[::1]:80', '[::]:443')`
|
|
* `listen('/tmp/glx.plain.sock', '/tmp/glx.secure.sock')`
|
|
|
|
Brief overview of some simple options for `greenlock.js`:
|
|
|
|
* `opts.server` set to https://acme-v02.api.letsencrypt.org/directory in production
|
|
* `opts.version` set to `v01` for Let's Encrypt v1 or `draft-11` for Let's Encrypt v2 (mistakenly called ACME v2)
|
|
* `opts.email` The default email to use to accept agreements.
|
|
* `opts.agreeTos` When set to `true`, this always accepts the LetsEncrypt TOS. When a string it checks the agreement url first.
|
|
* `opts.communityMember` Join the community to get notified of important updates and help make greenlock better
|
|
* `opts.approveDomains` can be either of:
|
|
* An explicit array of allowed domains such as `[ 'example.com', 'www.example.com' ]`
|
|
* A callback `function (opts, certs, cb) { cb(null, { options: opts, certs: certs }); }` for setting `email`, `agreeTos`, `domains`, etc (as shown in usage example above)
|
|
* `opts.renewWithin` is the **maximum** number of days (in ms) before expiration to renew a certificate.
|
|
* `opts.renewBy` is the **minimum** number of days (in ms) before expiration to renew a certificate.
|
|
|
|
## Supported ACME versions
|
|
|
|
* Let's Encrypt v1 (aka v01)
|
|
* Let's Encrypt v2 (aka v02 or ACME draft 11)
|
|
* ACME draft 11 (ACME v2 is a misnomer)
|
|
* Wildcard domains (via dns-01 challenges)
|
|
* `*.example.com`
|
|
|
|
<small>tags: letsencrypt acme free ssl automated https node express.js</small>
|
|
|
|
# Legal & Rules of the Road
|
|
|
|
Greenlock™ is a [trademark](https://rootprojects.org/legal/#trademark) of AJ ONeal
|
|
|
|
The rule of thumb is "attribute, but don't confuse". For example:
|
|
|
|
> Built with [Greenlock CLI](https://git.rootprojects.org/root/greenlock-cli.js) (a [Root](https://rootprojects.org) project).
|
|
|
|
Please [contact us](mailto:aj@therootcompany.com) if you have any questions in regards to our trademark,
|
|
attribution, and/or visible source policies. We want to build great software and a great community.
|
|
|
|
[Greenlock™](https://git.rootprojects.org/root/greenlock.js) |
|
|
MPL-2.0 |
|
|
[Terms of Use](https://therootcompany.com/legal/#terms) |
|
|
[Privacy Policy](https://therootcompany.com/legal/#privacy)
|