acme-challenge-test.js/index.js

231 lines
7.3 KiB
JavaScript

'use strict';
/*global Promise*/
var crypto = require('crypto');
module.exports.create = function() {
throw new Error(
'acme-challenge-test is a test fixture for acme-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;
}
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 };
if ('http-01' === ch.type) {
query.identifier = ch.identifier;
query.token = ch.token;
// For testing only
query.url = ch.challengeUrl;
} 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;
query.dnsAuthorization = ch.dnsAuthorization;
} 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 acme / 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.
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 +
"'"
);
}
} 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 +
"'"
);
}
} 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
);
}
}
})
.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');
var dnsAuth = crypto
.createHash('sha256')
.update(keyAuth)
.digest('base64')
.replace(/\+/g, '-')
.replace(/\//g, '_')
.replace(/=/g, '');
var challenge = {
type: type,
identifier: { type: 'dns', value: null }, // completed below
wildcard: false, // completed below
status: 'pending',
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
};
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 });
};