acme-challenge-test.js/README.md

# [acme-challenge-test](https://git.rootprojects.org/root/acme-challenge-test.js.git) | a [Root](https://rootprojects.org) project

The test harness you should use when writing an ACME challenge strategy
for [ACME.js](https://git.coolaj86.com/coolaj86/acme-v2.js) and also [Greenlock](https://git.coolaj86.com/coolaj86/greenlock-express.js) 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

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

## Usage

```js
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.

- [`acme-http-01-cli`](https://git.rootprojects.org/root/acme-http-01-cli.js)
- [`acme-dns-01-cli`](https://git.rootprojects.org/root/acme-dns-01-cli.js)

You can find other implementations by searching npm for [acme-http-01-](https://www.npmjs.com/search?q=acme-http-01-) and [acme-dns-01-](https://www.npmjs.com/search?q=acme-dns-01-).

## Example

See `example.js` (it works).

## Starter Template

Here's what you could start with.

```js
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:

```js
tester
  .test('http-01', 'example.com', {
  
    set: function(opts) {
      var ch = opts.challenge;
      // { type: 'http-01' // or 'dns-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: 'http-01' // or 'dns-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:

```js
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`