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acme-challenge-test | a Root project

The test harness you should use when writing an ACME challenge strategy for ACME.js and also Greenlock v2.7+ (and v3).

All implementations MUST pass these tests, which is a very easy thing to do (just set(), get(), and remove()).

The tests account for single-domain certificates (example.com) as well as multiple domain certs (SAN / AltName), wildcards (*.example.com), and valid private / localhost certificates. No worries on your end, just pass the tests. 👌

Node v6 Support: Please build community plugins using node v6 / vanillajs to ensure that all acme.js and greenlock.js users are fully supported.

Install

npm install --save-dev acme-challenge-test@3.x

Usage

var tester = require("acme-challenge-test");

//var challenger = require('acme-http-01-cli').create({});
//var challenger = require('acme-dns-01-cli').create({});
var challenger = require("./YOUR-CHALLENGE-STRATEGY").create({
  YOUR_TOKEN_OPTION: 'SOME_API_KEY'
});

// The dry-run tests can pass on, literally, 'example.com'
// but the integration tests require that you have control over the domain
var domain = "example.com";

tester.test("http-01", domain, challenger).then(function() {
	console.info("PASS");
});

Reference Implementations

These are plugins that use the v2.7+ (v3) API, and pass this test harness, which you should use as a model for any plugins that you create.

You can find other implementations by searching npm for acme-http-01- and acme-dns-01-.

Example

See example.js (it works).

Starter Template

Here's what you could start with.

var tester = require('acme-challenge-test');

// The dry-run tests can pass on, literally, 'example.com'
// but the integration tests require that you have control over the domain
var domain = 'example.com';

tester
  .test('http-01', domain, {
    // Should set a TXT record for dnsHost with dnsAuthorization and ttl || 300
    set: function(opts) {
      console.log('set opts:', opts);
      throw new Error('set not implemented');
    },

    // Should remove the *one* TXT record for dnsHost with dnsAuthorization
    // Should NOT remove otherrecords for dnsHost (wildcard shares dnsHost with
    // non-wildcard)
    remove: function(opts) {
      console.log('remove opts:', opts);
      throw new Error('remove not implemented');
    },

    // Should get the record via the DNS server's API
    get: function(opts) {
      console.log('get opts:', opts);
      throw new Error('get not implemented');
    }
  })
  .then(function() {
    console.info('PASS');
  });

dns-01 vs http-01

For type http-01:

// `altname` is the name of the domain
// `token` is the name of the file ( .well-known/acme-challenge/`token` )
// `keyAuthorization` is the contents of the file

For type dns-01:

// `dnsHost` is the domain/subdomain/host
// `dnsAuthorization` is the value of the TXT record

Detailed Overview

Here's a quick pseudo stub-out of what a test-passing plugin object might look like:

tester
  .test('dns-01', 'example.com', {
  
    set: function(opts) {
      var ch = opts.challenge;
      // { type: 'dns-01' // or 'http-01'
      // , identifier: { type: 'dns', value: 'example.com' }
      // , wildcard: false
      // , token: 'xxxx'
      // , keyAuthorization: 'xxxx.yyyy'
      // , dnsHost: '_acme-challenge.example.com'
      // , dnsAuthorization: 'zzzz' }

      return YourApi('POST', 'https://example.com/api/dns/txt', {
        host: ch.dnsHost,
        record: ch.dnsAuthorization
      });
    },
    
    get: function(query) {
      var ch = query.challenge;
      // { type: 'dns-01' // or 'http-01', 'tls-alpn-01', etc
      // , identifier: { type: 'dns', value: 'example.com' }
      //   // http-01 only
      // , token: 'xxxx'
      // , url: '...' // for testing and debugging
      //   // dns-01 only, for testing / dubgging
      // , altname: '...'
      // , dnsHost: '...'
      // , wildcard: false }
      // Note: query.identifier.value is different for http-01 than for dns-01

      return YourApi('GET', 'https://example.com/api/dns/txt', {
        host: ch.dnsHost
      }).then(function(secret) {
        // http-01
        //return { keyAuthorization: secret };
        // dns-01
        return { dnsAuthorization: secret };
      });
    },
    
    remove: function(opts) {
      var ch = opts.challenge;
      // same options as in `set()` (which are not the same as `get()`

      return YourApi('DELETE', 'https://example.com/api/dns/txt/' + ch.dnsHost);
    }
  })
  .then(function() {
    console.info('PASS');
  });

Where YourApi might look something like this:

var YourApi = function createApi(config) {
  var request = require('@root/request');
  request = require('util').promisify(request);
    
  return function (method, url, body) {
    return request({
      method: method,
      url: url,
      json: body || true,
      headers: {
        Authorization: 'Bearer ' + config.apiToken
      }
    }).then(function(resp) {
      return resp.body;
    });
  }
}

Two notes:

Note 1:

The API.get(), API.set(), and API.remove() is where you do your magic up to upload a file to the correct location on an http serever, set DNS records, or add the appropriate data to the database that handles such things.

Note 2:

When altname is foo.example.com the dnsHost will be _acme-challenge.foo.example.com
When altname is *.foo.example.com the dnsHost will still be _acme-challenge.foo.example.com!!
When altname is bar.foo.example.com the dnsHost will be _acme-challenge.bar.foo.example.com

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