acme.js/README.md

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acme.js
==========
Free SSL for everybody. The bare essentials of the Let's Encrypt v2 (ACME draft 11) API. Built for [Greenlock](https://git.coolaj86.com/coolaj86/greenlock-express.js), [by request](https://git.coolaj86.com/coolaj86/greenlock.js/issues/5#issuecomment-8).
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| [Greenlock for Express.js](https://git.coolaj86.com/coolaj86/greenlock-express.js)
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This is intented for building ACME API clients in node.js.
Looking for Quick 'n' Easy™?
=======
If you're looking to *build* a *browser* client, try [Greenlock Web Browsers](https://git.coolaj86.com/coolaj86/greenlock.html).
If you're looking to *build* a node.js *service* or *cli*, try [Greenlock for node.js](https://git.coolaj86.com/coolaj86/greenlock.js).
If you're looking for an *ACME-enabled webserver*, try [Greenlock for Express.js](https://git.coolaj86.com/coolaj86/greenlock-express.js) or [goldilocks.js](https://git.coolaj86.com/coolaj86/goldilocks.js).
* [Greenlock for Web Browsers](https://git.coolaj86.com/coolaj86/greenlock.html)
* [Greenlock for node.js](https://git.coolaj86.com/coolaj86/greenlock.js)
* [Greenlock for Express.js](https://git.coolaj86.com/coolaj86/greenlock-express.js)
* [goldilocks.js](https://git.coolaj86.com/coolaj86/goldilocks.js)
Let's Encrypt v2 / ACME draft 11 Support
========
This library (acme.js) supports ACME [*draft 11*](https://tools.ietf.org/html/draft-ietf-acme-acme-11),
otherwise known as Let's Encrypt v2 (or v02).
* ACME draft 11
* Let's Encrypt v2
* Let's Encrypt v02
```
# Production URL
https://acme-v02.api.letsencrypt.org/directory
```
```
# Staging URL
https://acme-staging-v02.api.letsencrypt.org/directory
```
Demonstration
=============
As this is intended to build ACME clients, there is not a simple 2-line example.
I'd recommend first trying out one of the [Greenlock for Web Servers](https://git.coolaj86.com/coolaj86/greenlock-cli.js)
examples, which are guaranteed to work and have great error checking to help you debug.
Then I'd recommend running the example CLI client with a test domain and then investigating the files used for that example:
```bash
git clone https://git.coolaj86.com/coolaj86/acme.js.git
pushd acme.js/
node examples/cli.js
```
The example cli has the following prompts:
```
What web address(es) would you like to get certificates for? (ex: example.com,*.example.com)
What challenge will you be testing today? http-01 or dns-01? [http-01]
What email should we use? (optional)
What directoryUrl should we use? [https://acme-staging-v02.api.letsencrypt.org/directory]
Put the string 'mBfh0SqaAV3MOK3B6cAhCbIReAyDuwuxlO1Sl70x6bM.VNAzCR4THe4czVzo9piNn73B1ZXRLaB2CESwJfKkvRM' into a file at 'example.com/.well-known/acme-challenge/mBfh0SqaAV3MOK3B6cAhCbIReAyDuwuxlO1Sl70x6bM'
echo 'mBfh0SqaAV3MOK3B6cAhCbIReAyDuwuxlO1Sl70x6bM.VNAzCR4THe4czVzo9piNn73B1ZXRLaB2CESwJfKkvRM' > 'example.com/.well-known/acme-challenge/mBfh0SqaAV3MOK3B6cAhCbIReAyDuwuxlO1Sl70x6bM'
Then hit the 'any' key to continue...
```
When you've completed the challenge you can hit a key to continue the process.
If you place the certificate you receive back in `tests/fullchain.pem`
then you can test it with `examples/https-server.js`.
```
examples/cli.js
examples/genkeypair.js
examples/https-server.js
examples/http-server.js
```
Install
=======
Install via npm
```bash
npm install --save acme
```
Install via git
```bash
npm install https://git.coolaj86.com/coolaj86/acme.js.git
```
API
===
This API is an evolution of le-acme-core,
but tries to provide a better mapping to the new draft 11 APIs.
Status: Almost stable, but **not semver locked**.
Patch versions will not introduce breaking changes,
but may introduce lower-level APIs.
Minor versions may change return values to include more information.
Overview:
```
var ACME = require('acme').ACME;
ACME.create(opts)
acme.init(acmeDirectoryUrl)
acme.accounts.create(opts)
acme.certificates.create(opts)
```
Detailed Explanation:
```
var ACME = require('acme').ACME;
// Create Instance (Dependency Injection)
var acme = ACME.create({
RSA: require('rsa-compat').RSA
// other overrides
, request: require('request')
, promisify: require('util').promisify
// used for constructing user-agent
, os: require('os')
, process: require('process')
// used for overriding the default user-agent
, userAgent: 'My custom UA String'
, getUserAgentString: function (deps) { return 'My custom UA String'; }
// don't try to validate challenges locally
, skipChallengeTest: false
});
// Discover Directory URLs
acme.init(acmeDirectoryUrl) // returns Promise<acmeUrls={keyChange,meta,newAccount,newNonce,newOrder,revokeCert}>
// Accounts
acme.accounts.create(options) // returns Promise<regr> registration data
{ email: '<email>' // valid email (server checks MX records)
, accountKeypair: { // privateKeyPem or privateKeyJwt
privateKeyPem: '<ASCII PEM>'
}
, agreeToTerms: fn (tosUrl) {} // returns Promise with tosUrl
}
// Registration
acme.certificates.create(options) // returns Promise<pems={ privkey (key), cert, chain (ca) }>
{ newAuthzUrl: '<url>' // specify acmeUrls.newAuthz
, newCertUrl: '<url>' // specify acmeUrls.newCert
, domainKeypair: {
privateKeyPem: '<ASCII PEM>'
}
, accountKeypair: {
privateKeyPem: '<ASCII PEM>'
}
, domains: [ 'example.com' ]
, setChallenge: fn (hostname, key, val) // return Promise
, removeChallenge: fn (hostname, key) // return Promise
}
```
Helpers & Stuff
```javascript
// Constants
ACME.challengePrefixes['http-01'] // '/.well-known/acme-challenge'
ACME.challengePrefixes['dns-01'] // '_acme-challenge'
```
Changelog
---------
* v1.0.8 - rename to acme.js
* v1.0.7 - improved error handling again, after user testing
* v1.0.6 - improved error handling
* v1.0.5 - cleanup logging
* v1.0.4 - v6- compat use `promisify` from node's util or bluebird
* v1.0.3 - documentation cleanup
* v1.0.2
* use `options.contact` to provide raw contact array
* made `options.email` optional
* file cleanup
* v1.0.1
* Compat API is ready for use
* Eliminate debug logging
* Apr 10, 2018 - tested backwards-compatibility using greenlock.js
* Apr 5, 2018 - export http and dns challenge tests
* Apr 5, 2018 - test http and dns challenges (success and failure)
* Apr 5, 2018 - test subdomains and its wildcard
* Apr 5, 2018 - test two subdomains
* Apr 5, 2018 - test wildcard
* Apr 5, 2018 - completely match api for acme v1 (le-acme-core.js)
* Mar 21, 2018 - *mostly* matches le-acme-core.js API
* Mar 21, 2018 - can now accept values (not hard coded)
* Mar 20, 2018 - SUCCESS - got a test certificate (hard-coded)
* Mar 20, 2018 - download certificate
* Mar 20, 2018 - poll for status
* Mar 20, 2018 - finalize order (submit csr)
* Mar 20, 2018 - generate domain keypair
* Mar 20, 2018 - respond to challenges
* Mar 16, 2018 - get challenges
* Mar 16, 2018 - new order
* Mar 15, 2018 - create account
* Mar 15, 2018 - generate account keypair
* Mar 15, 2018 - get nonce
* Mar 15, 2018 - get directory