acme-dns-01-test.js/index.js

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'use strict';
/*global Promise*/
var crypto = require('crypto');
module.exports.create = function () {
throw new Error("greenlock-challenge-test is a test fixture for greenlock-challenge-* plugins, not a plugin itself");
};
// ignore all of this, it's just to normalize Promise vs node-style callback thunk vs synchronous
function promiseCheckAndCatch(obj, name) {
var promisify = require('util').promisify;
// don't loose this-ness, just in case that's important
var fn = obj[name].bind(obj);
var promiser;
// function signature must match, or an error will be thrown
if (1 === fn.length) {
// wrap so that synchronous errors are caught (alsa handles synchronous results)
promiser = function (opts) {
return Promise.resolve().then(function () {
return fn(opts);
});
};
} else if (2 === fn.length) {
// wrap as a promise
promiser = promisify(fn);
} else {
return Promise.reject(new Error("'challenge." + name + "' should accept either one argument, the options,"
+ " and return a Promise or accept two arguments, the options and a node-style callback thunk"));
}
function shouldntBeNull(result) {
if ('undefined' === typeof result) {
throw new Error("'challenge.'" + name + "' should never return `undefined`. Please explicitly return null"
+ " (or fix the place where a value should have been returned but wasn't).");
}
return result;
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}
return function (opts) {
return promiser(opts).then(shouldntBeNull);
};
}
// Here's the meat, where the tests are happening:
function run(challenger, opts) {
var ch = opts.challenge;
if ('http-01' === ch.type && ch.wildname) {
throw new Error("http-01 cannot be used for wildcard domains");
}
var set = promiseCheckAndCatch(challenger, 'set');
if ('function' !== typeof challenger.get) {
throw new Error("'challenge.get' should be implemented for the sake of testing."
+ " It should be implemented as the internal method for fetching the challenge"
+ " (i.e. reading from a database, file system or API, not return internal),"
+ " not the external check (the http call, dns query, etc), which will already be done as part of this test.");
}
var get = promiseCheckAndCatch(challenger, 'get');
var remove = promiseCheckAndCatch(challenger, 'remove');
// The first time we just check it against itself
// this will cause the prompt to appear
return set(opts).then(function () {
// this will cause the final completion message to appear
// _test is used by the manual cli reference implementations
var query = { type: ch.type, /*debug*/ status: ch.status, _test: true };
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if ('http-01' === ch.type) {
query.identifier = ch.identifier;
query.token = ch.token;
// For testing only
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query.url = ch.challengeUrl;
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} else if ('dns-01' === ch.type) {
query.identifier = { type: 'dns', value: ch.dnsHost };
// For testing only
query.altname = ch.altname;
// there should only be two possible TXT records per challenge domain:
// one for the bare domain, and the other if and only if there's a wildcard
query.wildcard = ch.wildcard;
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} else {
query = JSON.parse(JSON.stringify(ch));
query.comment = "unknown challenge type, supplying everything";
}
return get({ challenge: query }).then(function (secret) {
if ('string' === typeof secret) {
console.info("secret was passed as a string, which works historically, but should be an object instead:");
console.info('{ "keyAuthorization": "' + secret + '" }');
console.info("or");
// TODO this should be "keyAuthorizationDigest"
console.info('{ "dnsAuthorization": "' + secret + '" }');
console.info("This is to help keep greenlock (and associated plugins) future-proof for new challenge types");
}
// historically 'secret' has been a string, but I'd like it to transition to be an object.
// to make it backwards compatible in v2.7 to change it,
// so I'm not sure that we really need to.
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if ('http-01' === ch.type) {
secret = secret.keyAuthorization || secret;
if (ch.keyAuthorization !== secret) {
throw new Error("http-01 challenge.get() returned '" + secret + "', which does not match the keyAuthorization"
+ " saved with challenge.set(), which was '" + ch.keyAuthorization + "'");
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}
} else if ('dns-01' === ch.type) {
secret = secret.dnsAuthorization || secret;
if (ch.dnsAuthorization !== secret) {
throw new Error("dns-01 challenge.get() returned '" + secret + "', which does not match the dnsAuthorization"
+ " (keyAuthDigest) saved with challenge.set(), which was '" + ch.dnsAuthorization + "'");
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}
} else {
if ('tls-alpn-01' === ch.type) {
console.warn("'tls-alpn-01' support is in development"
+ " (or developed and we haven't update this yet). Please contact us.");
} else {
console.warn("We don't know how to test '" + ch.type + "'... are you sure that's a thing?");
}
secret = secret.keyAuthorization || secret;
if (ch.keyAuthorization !== secret) {
console.warn("The returned value doesn't match keyAuthorization", ch.keyAuthorization, secret);
}
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}
}).then(function () {
return remove(opts).then(function () {
return get(opts).then(function (result) {
if (result) {
throw new Error("challenge.remove() should have made it not possible for challenge.get() to return a value");
}
if (null !== result) {
throw new Error("challenge.get() should return null when the value is not set");
}
});
});
});
}).then(function () {
console.info("All soft tests: PASS");
console.warn("Hard tests (actually checking http URLs and dns records) is implemented in acme-v2.");
console.warn("We'll copy them over here as well, but that's a TODO for next week.");
});
}
module.exports.test = function (type, altname, challenger) {
var expires = new Date(Date.now() + (10*60*1000)).toISOString();
var token = crypto.randomBytes(8).toString('hex');
var thumb = crypto.randomBytes(16).toString('hex');
var keyAuth = token + '.' + crypto.randomBytes(16).toString('hex');
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var dnsAuth = crypto.createHash('sha256').update(keyAuth).digest('base64')
.replace(/\+/g, '-').replace(/\//g, '_').replace(/=/g, '');
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var challenge = {
type: type
, identifier: { type: 'dns', value: null } // completed below
, wildcard: false // completed below
, status: 'pending'
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, expires: expires
, token: token
, thumbprint: thumb
, keyAuthorization: keyAuth
, url: null // completed below
, dnsHost: '_acme-challenge.' // completed below
, dnsAuthorization: dnsAuth
, altname: altname
, _test: true // used by CLI referenced implementations
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};
if ('*.' === altname.slice(0, 2)) {
challenge.wildcard = true;
altname = altname.slice(2);
}
challenge.identifier.value = altname;
challenge.url = 'http://' + altname + '/.well-known/acme-challenge/' + challenge.token;
challenge.dnsHost += altname;
return run(challenger, { challenge: challenge });
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};