# le-challenge-dns

| A [Root](https://rootprojects.org) Project
| [greenlock.js](https://git.coolaj86.com/coolaj86/greenlock.js) (library)
| [greenlock-express.js](https://git.coolaj86.com/coolaj86/greenlock-express.js)
| [greenlock-cli.js](https://git.coolaj86.com/coolaj86/greenlock-cli.js)
| [acme-v2.js](https://git.coolaj86.com/coolaj86/acme-v2.js)
|

A manual (interactive CLI) dns-based strategy for greenlock.js for setting, retrieving,
and clearing ACME DNS-01 challenges issued by the ACME server

Prints out a subdomain record for `_acme-challenge` with `keyAuthDigest`
to be tested by the ACME server.

You can then update your DNS manually by whichever method you use and then
press [enter] to continue the process.

```
_acme-challenge.example.com   TXT   xxxxxxxxxxxxxxxx    TTL 60
```

## Install

```bash
npm install --save le-challenge-dns@3.x
```

If you have `greenlock@v2.6` or lower, you'll need the old `le-challenge-dns@3.x` instead.

## Usage

The challenge can be set globally like this:

```js
var leChallengeDns = require('le-challenge-dns').create({
  debug: false
});

var Greenlock = require('greenlock');

Greenlock.create({
  ...
, challenges: {
    'dns-01': leChallengeDns
  }
, approveDomains: [ 'example.com', '*.example.com' ]
});
```

In can also be set in the `approveDomains` callback instead, like this:

```js
function approveDomains(opts, certs, cb) {
  ...
  opts.subject = 'example.com'
  opts.domains = [ 'example.com', '*.example.com' ];

  cb(null, { options: opts, certs: certs });
}
```

If you didn't make the dns challenge globally available in the main greenlock config,
you can make it locally available here:

```js
function approveDomains(opts, certs, cb) {
  ...

  if (!opts.challenges) { opts.challenges = {}; }
  opts.challenges['dns-01'] = leChallengeDns;
  opts.challenges['http-01'] = ...

  cb(null, { options: opts, certs: certs });
}
```

NOTE: If you request a certificate with 6 domains listed,
it will require 6 individual challenges.

## Exposed Methods

For ACME Challenge:

* `set(opts, done)`
* `remove(opts, done)`

The options object has whatever options were set in `approveDomains()` as well as the `challenge`:

```js
{ challenge: {
    identifier: { type: 'dns', value: 'example.com'
  , wildcard: true
  , altname: '*.example.com'
  , type: 'dns-01'
  , token: 'xxxxxx'
  , keyAuthorization: 'xxxxxx.abc123'
  , dnsHost: '_acme-challenge.example.com'
  , dnsAuthorization: 'abc123'
  , expires: '1970-01-01T00:00:00Z'
  }
}
```

Note: There's no `get()` because it's the DNS server, not the Greenlock server, that answers the requests.
(though I suppose you could implement it if you happen to run your DNS and webserver together... kinda weird though)

For greenlock.js internals:

* `options` stores the internal defaults merged with the user-supplied options