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acme.js

Free SSL for everybody. The bare essentials of the Let's Encrypt v2 (ACME) API. Built for Greenlock, by request.

| A Root Project |

Looking for Quick 'n' Easy™?

This is intented for building ACME API clients in node.js. It is not a high-level, fully-integrated solution.

You may be more interested in one of these:

https://greenlock.domains Instant SSL Certificates in your Browser
Greenlock for Web Browsers (Browser JavaScript)
Greenlock for Web Servers (Command line, like certbot)
Greenlock for Express.js (Automated HTTPS for Express.js apps)
Greenlock for node.js (Automated HTTPS for Proxies, Load-Balances, Servers, CLIs)
goldilocks.js (A Full-Blown WebServer)

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-express.js or Greenlock for Web Servers 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:

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

Let's Encrypt v2 / ACME draft 11 Support

This library (acme.js) supports ACME draft 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

Install

Install via npm

npm install --save acme

Install via git

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

// Constants
ACME.challengePrefixes['http-01']             // '/.well-known/acme-challenge'
ACME.challengePrefixes['dns-01']              // '_acme-challenge'

Changelog

v1.0.9 - update docs
v1.0.8 - rename to acme.js, remove backwards compat
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

Legal

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