344 lines
9.5 KiB
Markdown
344 lines
9.5 KiB
Markdown
# [ACME.js](https://git.rootprojects.org/root/bluecrypt-acme.js)
|
|
|
|
Free SSL Certificates from Let's Encrypt, for Node.js and Web Browsers
|
|
|
|
Lightweight. Fast. Modern Crypto. Zero dependecies.
|
|
|
|
# Features
|
|
|
|
| 15k gzipped | 55k minified | 88k (2,500 loc) source with comments |
|
|
|
|
- [x] Let's Encrypt v2.1+ (November 2019)
|
|
- [x] ACME draft 15 (supports POST-as-GET)
|
|
- [x] Secure support for EC and RSA for account and server keys
|
|
- [x] Simple and lightweight PEM, DER, ASN1, X509, and CSR implementations
|
|
- [x] Supports International Domain Names (i.e. `.中国`)
|
|
- [x] VanillaJS, Zero External Dependencies
|
|
- [x] Node.js\* (v6+)
|
|
- [x] WebPack
|
|
|
|
\* Although we use `async/await` in the examples, the code is written in CommonJS,
|
|
with Promises, so you can use it in Node.js and Browsers without transpiling.
|
|
|
|
# Want Quick and Easy?
|
|
|
|
ACME.js is a low-level tool for building Let's Encrypt clients in Node and Browsers.
|
|
|
|
If you're looking for maximum convenience, try
|
|
[Greenlock.js](https://git.rootprojects.org/root/greenlock-express.js).
|
|
|
|
- <https://git.rootprojects.org/root/greenlock-express.js>
|
|
|
|
# Online Demos
|
|
|
|
- Greenlock for the Web <https://greenlock.domains>
|
|
- ACME.js Demo <https://rootprojects.org/acme/>
|
|
|
|
We expect that our hosted versions will meet all of yours needs.
|
|
If they don't, please open an issue to let us know why.
|
|
|
|
We'd much rather improve the app than have a hundred different versions running in the wild.
|
|
However, in keeping to our values we've made the source visible for others to inspect, improve, and modify.
|
|
|
|
# QuickStart
|
|
|
|
To make it easy to generate, encode, and decode keys and certificates,
|
|
ACME.js embeds [Keypairs.js](https://git.rootprojects.org/root/bluecrypt-keypairs.js)
|
|
and [CSR.js](https://git.rootprojects.org/root/bluecrypt-csr.js)
|
|
|
|
## Node.js
|
|
|
|
```js
|
|
var ACME = require('@root/acme');
|
|
```
|
|
|
|
## WebPack
|
|
|
|
```html
|
|
<meta charset="UTF-8" />
|
|
```
|
|
|
|
(necessary in case the webserver headers don't specify `plain/text; charset="UTF-8"`)
|
|
|
|
```js
|
|
var ACME = require('@root/acme');
|
|
```
|
|
|
|
## Vanilla JS
|
|
|
|
```html
|
|
<meta charset="UTF-8" />
|
|
```
|
|
|
|
(necessary in case the webserver headers don't specify `plain/text; charset="UTF-8"`)
|
|
|
|
`acme.js`
|
|
|
|
```html
|
|
<script src="https://unpkg.com/@root/acme@3.0.0/dist/acme.js"></script>
|
|
```
|
|
|
|
`acme.min.js`
|
|
|
|
```html
|
|
<script src="https://unpkg.com/@root/acme@3.0.0/dist/acme.min.js"></script>
|
|
```
|
|
|
|
Use
|
|
|
|
```js
|
|
var ACME = window['@root/acme'];
|
|
```
|
|
|
|
## Examples
|
|
|
|
You can see `tests/index.js`, `examples/index.html`, `examples/app.js` in the repo for full example usage.
|
|
|
|
### Emails: Maintainer vs Subscriber vs Customer
|
|
|
|
- `maintainerEmail` should be the email address of the **author of the code**.
|
|
This person will receive critical security and API change notifications.
|
|
- `subscriberEmail` should be the email of the **admin of the hosting service**.
|
|
This person agrees to the Let's Encrypt Terms of Service and will be notified
|
|
when a certificate fails to renew.
|
|
- `customerEmail` should be the email of individual who owns the domain.
|
|
This is optional (not currently implemented).
|
|
|
|
Generally speaking **YOU** are the _maintainer_ and you **or your employer** is the _subscriber_.
|
|
|
|
If you (or your employer) is running any type of service
|
|
you **SHOULD NOT** pass the _customer_ email as the subscriber email.
|
|
|
|
If you are not running a service (you may be building a CLI, for example),
|
|
then you should prompt the user for their email address, and they are the subscriber.
|
|
|
|
### Instantiate ACME.js
|
|
|
|
Although built for Let's Encrypt, ACME.js will work with any server
|
|
that supports draft-15 of the ACME spec (includes POST-as-GET support).
|
|
|
|
The `init()` method takes a _directory url_ and initializes internal state according to its response.
|
|
|
|
```js
|
|
var acme = ACME.create({
|
|
maintainerEmail: 'jon@example.com'
|
|
});
|
|
acme.init('https://acme-staging-v02.api.letsencrypt.org/directory').then(
|
|
function() {
|
|
// Ready to use, show page
|
|
$('body').hidden = false;
|
|
}
|
|
);
|
|
```
|
|
|
|
### Create ACME Account with Let's Encrypt
|
|
|
|
ACME Accounts are key and device based, with an email address as a backup identifier.
|
|
|
|
A public account key must be registered before an SSL certificate can be requested.
|
|
|
|
```js
|
|
var accountPrivateKey;
|
|
var account;
|
|
|
|
Keypairs.generate({ kty: 'EC' }).then(function(pair) {
|
|
accountPrivateKey = pair.private;
|
|
|
|
return acme.accounts
|
|
.create({
|
|
agreeToTerms: function(tos) {
|
|
if (
|
|
window.confirm(
|
|
"Do you agree to the ACME.js and Let's Encrypt Terms of Service?"
|
|
)
|
|
) {
|
|
return Promise.resolve(tos);
|
|
}
|
|
},
|
|
accountKeypair: { privateKeyJwk: pair.private },
|
|
subscriberEmail: $('.js-email-input').value
|
|
})
|
|
.then(function(_account) {
|
|
account = _account;
|
|
});
|
|
});
|
|
```
|
|
|
|
### Generate a Certificate Private Key
|
|
|
|
```js
|
|
var certKeypair = await Keypairs.generate({ kty: 'RSA' });
|
|
var pem = await Keypairs.export({
|
|
jwk: certKeypair.private,
|
|
encoding: 'pem'
|
|
});
|
|
|
|
// This should be saved as `privkey.pem`
|
|
console.log(pem);
|
|
```
|
|
|
|
### Generate a CSR
|
|
|
|
The easiest way to generate a Certificate Signing Request will be either with `openssl` or with `@root/CSR`.
|
|
|
|
```js
|
|
var CSR = require('@root/csr');
|
|
var Enc = require('@root/encoding');
|
|
|
|
// 'subject' should be first in list
|
|
var sortedDomains = ['example.com', 'www.example.com'];
|
|
var csr = await CSR.csr({
|
|
jwk: certKeypair.private,
|
|
domains: sortedDomains,
|
|
encoding: 'der'
|
|
}).then(function(der) {
|
|
return Enc.bufToUrlBase64(der);
|
|
});
|
|
```
|
|
|
|
### Get Free 90-day SSL Certificate
|
|
|
|
Creating an ACME "order" for a 90-day SSL certificate requires use of the account private key,
|
|
the names of domains to be secured, and a distinctly separate server private key.
|
|
|
|
A domain ownership verification "challenge" (uploading a file to an unsecured HTTP url or setting a DNS record)
|
|
is a required part of the process, which requires `set` and `remove` callbacks/promises.
|
|
|
|
```js
|
|
var certinfo = await acme.certificates.create({
|
|
agreeToTerms: function(tos) {
|
|
return tos;
|
|
},
|
|
account: account,
|
|
accountKeypair: { privateKeyJwk: accountPrivateKey },
|
|
csr: csr,
|
|
domains: sortedDomains,
|
|
challenges: challenges, // must be implemented
|
|
customerEmail: null,
|
|
skipChallengeTests: false,
|
|
skipDryRun: false
|
|
});
|
|
|
|
console.log('Got SSL Certificate:');
|
|
console.log(results.expires);
|
|
|
|
// This should be saved as `fullchain.pem`
|
|
console.log([results.cert, results.chain].join('\n'));
|
|
```
|
|
|
|
### Example "Challenge" Implementation
|
|
|
|
Typically here you're just presenting some sort of dialog to the user to ask them to
|
|
upload a file or set a DNS record.
|
|
|
|
It may be possible to do something fancy like using OAuth2 to login to Google Domanis
|
|
to set a DNS address, etc, but it seems like that sort of fanciness is probably best
|
|
reserved for server-side plugins.
|
|
|
|
```js
|
|
var challenges = {
|
|
'http-01': {
|
|
set: function(opts) {
|
|
console.info('http-01 set challenge:');
|
|
console.info(opts.challengeUrl);
|
|
console.info(opts.keyAuthorization);
|
|
while (
|
|
!window.confirm('Upload the challenge file before continuing.')
|
|
) {}
|
|
return Promise.resolve();
|
|
},
|
|
remove: function(opts) {
|
|
console.log('http-01 remove challenge:', opts.challengeUrl);
|
|
return Promise.resolve();
|
|
}
|
|
}
|
|
};
|
|
```
|
|
|
|
# IDN - International Domain Names
|
|
|
|
Convert domain names to `punycode` before creating the certificate:
|
|
|
|
```js
|
|
var punycode = require('punycode');
|
|
|
|
acme.certificates.create({
|
|
// ...
|
|
domains: ['example.com', 'www.example.com'].map(function(name) {
|
|
return punycode.toASCII(name);
|
|
})
|
|
});
|
|
```
|
|
|
|
The punycode library itself is lightweight and dependency-free.
|
|
It is available both in node and for browsers.
|
|
|
|
# Testing
|
|
|
|
You will need to use one of the [`acme-dns-01-*` plugins](https://www.npmjs.com/search?q=acme-dns-01-)
|
|
to run the test locally.
|
|
|
|
You'll also need a `.env` that looks something like the one in `examples/example.env`:
|
|
|
|
```bash
|
|
ENV=DEV
|
|
SUBSCRIBER_EMAIL=letsencrypt+staging@example.com
|
|
BASE_DOMAIN=test.example.com
|
|
CHALLENGE_TYPE=dns-01
|
|
CHALLENGE_PLUGIN=acme-dns-01-digitalocean
|
|
CHALLENGE_OPTIONS='{"token":"xxxxxxxxxxxx"}'
|
|
```
|
|
|
|
For example:
|
|
|
|
```bash
|
|
# Get the repo and change directories into it
|
|
git clone https://git.rootprojects.org/root/bluecrypt-acme.js
|
|
pushd bluecrypt-acme.js/
|
|
|
|
# Install the challenge plugin you'll use for the tests
|
|
npm install --save-dev acme-dns-01-digitalocean
|
|
|
|
# Copy the sample .env file
|
|
rsync -av examples/example.env .env
|
|
|
|
# Edit the config file to use a domain in your account, and your API token
|
|
#vim .env
|
|
code .env
|
|
|
|
# Run the tests
|
|
node tests/index.js
|
|
```
|
|
|
|
# Developing
|
|
|
|
You can see `<script>` tags in the `index.html` in the repo, which references the original
|
|
source files.
|
|
|
|
Join `@rootprojects` `#general` on [Keybase](https://keybase.io) if you'd like to chat with us.
|
|
|
|
# Commercial Support
|
|
|
|
We have both commercial support and commercial licensing available.
|
|
|
|
You're welcome to [contact us](mailto:aj@therootcompany.com) in regards to IoT, On-Prem,
|
|
Enterprise, and Internal installations, integrations, and deployments.
|
|
|
|
We also offer consulting for all-things-ACME and Let's Encrypt.
|
|
|
|
# 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 [ACME.js](https://git.rootprojects.org/root/bluecrypt-acme.js) (a [Root](https://rootprojects.org) project).
|
|
|
|
Please [contact us](mailto:aj@therootcompany.com) if have any questions in regards to our trademark,
|
|
attribution, and/or visible source policies. We want to build great software and a great community.
|
|
|
|
[ACME.js](https://git.rootprojects.org/root/acme.js) |
|
|
MPL-2.0 |
|
|
[Terms of Use](https://therootcompany.com/legal/#terms) |
|
|
[Privacy Policy](https://therootcompany.com/legal/#privacy)
|