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acme.js
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v1.7.0: better error checking and challenge type handling

This commit is contained in:
AJ ONeal 2019-04-02 16:04:15 -06:00
parent 21e2afdd7e
commit b1182457cd
2 changed files with 120 additions and 41 deletions
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155
node.js
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@ -261,6 +261,36 @@ ACME._wait = function wait(ms) {
});
};
ACME._testChallengeOptions = function () {
var chToken = require('crypto').randomBytes(16).toString('hex');
return [
{
"type": "http-01",
"status": "pending",
"url": "https://acme-staging-v02.example.com/0",
"token": "test-" + chToken + "-0"
}
, {
"type": "dns-01",
"status": "pending",
"url": "https://acme-staging-v02.example.com/1",
"token": "test-" + chToken + "-1",
"_wildcard": true
}
, {
"type": "tls-sni-01",
"status": "pending",
"url": "https://acme-staging-v02.example.com/2",
"token": "test-" + chToken + "-2"
}
, {
"type": "tls-alpn-01",
"status": "pending",
"url": "https://acme-staging-v02.example.com/3",
"token": "test-" + chToken + "-3"
}
];
};
ACME._testChallenges = function (me, options) {
if (me.skipChallengeTest) {
return Promise.resolve();
@ -268,27 +298,57 @@ ACME._testChallenges = function (me, options) {
return Promise.all(options.domains.map(function (identifierValue) {
// TODO we really only need one to pass, not all to pass
return Promise.all(options.challengeTypes.map(function (chType) {
var chToken = require('crypto').randomBytes(16).toString('hex');
var results = ACME._testChallengeOptions();
if (identifierValue.inludes("*")) {
results = results.filter(function (ch) { return ch._wildcard; });
}
var challenge = ACME._chooseChallenge(options, results);
if (!challenge) {
// For example, wildcards require dns-01 and, if we don't have that, we have to bail
var enabled = options.challengeTypes.join(', ') || 'none';
var suitable = results.map(function (r) { return r.type; }).join(', ') || 'none';
return Promise.reject(new Error(
"None of the challenge types that you've enabled ( " + enabled + " )"
+ " are suitable for validating the domain you've selected (" + identifierValue + ")."
+ " You must enable one of ( " + suitable + " )."
));
}
return Promise.resolve().then(function () {
var thumbprint = me.RSA.thumbprint(options.accountKeypair);
var keyAuthorization = chToken + '.' + thumbprint;
var keyAuthorization = challenge.token + '.' + thumbprint;
var auth = {
identifier: { type: "dns", value: identifierValue }
, hostname: identifierValue
, type: chType
, token: chToken
, type: challenge.type
, token: challenge.token
, thumbprint: thumbprint
, keyAuthorization: keyAuthorization
, dnsAuthorization: me.RSA.utils.toWebsafeBase64(
, dnsAuthorization: ACME._toWebsafeBase64(
require('crypto').createHash('sha256').update(keyAuthorization).digest('base64')
)
};
return ACME._setChallenge(me, options, auth).then(function () {
return ACME.challengeTests[chType](me, auth);
return ACME.challengeTests[challenge.type](me, auth);
});
});
}));
}));
};
ACME._chooseChallenge = function(options, results) {
// For each of the challenge types that we support
var challenge;
options.challengesTypes.some(function (chType) {
// And for each of the challenge types that are allowed
return results.challenges.some(function (ch) {
// Check to see if there are any matches
if (ch.type === chType) {
challenge = ch;
return true;
}
});
});
return challenge;
};
// https://tools.ietf.org/html/draft-ietf-acme-acme-10#section-7.5.1
@ -310,7 +370,7 @@ ACME._postChallenge = function (me, options, identifier, ch) {
, token: ch.token
, thumbprint: thumbprint
, keyAuthorization: keyAuthorization
, dnsAuthorization: me.RSA.utils.toWebsafeBase64(
, dnsAuthorization: ACME._toWebsafeBase64(
require('crypto').createHash('sha256').update(keyAuthorization).digest('base64')
)
};
@ -337,7 +397,7 @@ ACME._postChallenge = function (me, options, identifier, ch) {
var jws = me.RSA.signJws(
options.accountKeypair
, undefined
, { nonce: me._nonce, alg: 'RS256', url: ch.url, kid: me._kid }
, { nonce: me._nonce, alg: (me._alg || 'RS256'), url: ch.url, kid: me._kid }
, Buffer.from(JSON.stringify({ "status": "deactivated" }))
);
me._nonce = null;
@ -562,24 +622,50 @@ ACME._finalizeOrder = function (me, options, validatedDomains) {
ACME._getCertificate = function (me, options) {
if (me.debug) { console.debug('[acme-v2] DEBUG get cert 1'); }
if (!options.challengeTypes) {
if (!options.challengeType) {
return Promise.reject(new Error("challenge type must be specified"));
// Lot's of error checking to inform the user of mistakes
if (!(options.challengeTypes||[]).length) {
options.challengeTypes = Object.keys(options.challenges||{});
}
options.challengeTypes = [ options.challengeType ];
if (!options.challengeTypes.length) {
options.challengeTypes = [ options.challengeType ].filter(Boolean);
}
if (options.challengeType) {
options.challengeTypes.sort(function (a, b) {
if (a === options.challengeType) { return -1; }
if (b === options.challengeType) { return 1; }
return 0;
});
if (options.challengeType !== options.challengeTypes[0]) {
return Promise.reject(new Error("options.challengeType is '" + options.challengeType + "',"
+ " which does not exist in the supplied types '" + options.challengeTypes.join(',') + "'"));
}
}
// TODO check that all challengeTypes are represented in challenges
if (!options.challengeTypes.length) {
return Promise.reject(new Error("options.challengesTypes (string array) must be specified"
+ " (and in order of preferential priority)."));
}
if (!(options.domains && options.domains.length)) {
return Promise.reject(new Error("options.domains must be a list of string domain names,"
+ " with the first being the subject of the domain (or options.subject must specified)."));
}
if (!options.subject) { options.subject = options.domains[0]; }
// It's just fine if there's no account, we'll go get the key id we need via the public key
if (!me._kid) {
if (options.accountKid) {
me._kid = options.accountKid;
if (options.accountKid || options.account.kid) {
me._kid = options.accountKid || options.account.kid;
} else {
//return Promise.reject(new Error("must include KeyID"));
// This is an idempotent request. It'll return the same account for the same public key.
return ACME._registerAccount(me, options).then(function () {
// start back from the top
return ACME._getCertificate(me, options);
});
}
}
// Do a little dry-run / self-test
return ACME._testChallenges(me, options).then(function () {
if (me.debug) { console.debug('[acme-v2] certificates.create'); }
return ACME._getNonce(me).then(function () {
@ -592,11 +678,14 @@ ACME._getCertificate = function (me, options) {
};
var payload = JSON.stringify(body);
// determine the signing algorithm to use in protected header // TODO isn't that handled by the signer?
me._kty = (options.accountKeypair.privateKeyJwk && options.accountKeypair.privateKeyJwk.kty || 'RSA');
me._alg = ('EC' === me._kty) ? 'ES256' : 'RS256'; // TODO vary with bitwidth of key (if not handled)
var jws = me.RSA.signJws(
options.accountKeypair
, undefined
, { nonce: me._nonce, alg: 'RS256', url: me._directoryUrls.newOrder, kid: me._kid }
, Buffer.from(payload)
, { nonce: me._nonce, alg: me._alg, url: me._directoryUrls.newOrder, kid: me._kid }
, Buffer.from(payload, 'utf8')
);
if (me.debug) { console.debug('\n[DEBUG] newOrder\n'); }
@ -634,35 +723,20 @@ ACME._getCertificate = function (me, options) {
return ACME._getChallenges(me, options, authUrl).then(function (results) {
// var domain = options.domains[i]; // results.identifier.value
var chType = options.challengeTypes.filter(function (chType) {
return results.challenges.some(function (ch) {
return ch.type === chType;
});
}).sort(function (aType, bType) {
var a = results.challenges.filter(function (ch) { return ch.type === aType; })[0];
var b = results.challenges.filter(function (ch) { return ch.type === bType; })[0];
if ('valid' === a.status) { return 1; }
if ('valid' === b.status) { return -1; }
return 0;
})[0];
var challenge = results.challenges.filter(function (ch) {
if (chType === ch.type) {
return ch;
// If it's already valid, we're golden it regardless
if (results.challenges.some(function (ch) { return 'valid' === ch.status; })) {
return;
}
})[0];
var challenge = ACME._chooseChallenge(options, results);
if (!challenge) {
// For example, wildcards require dns-01 and, if we don't have that, we have to bail
return Promise.reject(new Error(
"Server didn't offer any challenge we can handle for '" + options.domains.join() + "'."
));
}
if ("valid" === challenge.status) {
return;
}
return ACME._postChallenge(me, options, results.identifier, challenge);
}).then(function () {
return next();
@ -705,6 +779,7 @@ ACME.create = function create(me) {
// me.debug = true;
me.challengePrefixes = ACME.challengePrefixes;
me.RSA = me.RSA || require('rsa-compat').RSA;
//me.Keypairs = me.Keypairs || require('keypairs');
me.request = me.request || require('@coolaj86/urequest');
me._dig = function (query) {
// TODO use digd.js
@ -767,3 +842,7 @@ ACME.create = function create(me) {
};
return me;
};
ACME._toWebsafeBase64 = function (b64) {
return b64.replace(/\+/g, "-").replace(/\//g, "_").replace(/=/g,"");
};

2
package.json
View File

@ -1,6 +1,6 @@
{
"name": "acme-v2",
"version": "1.6.0",
"version": "1.7.0",
"description": "Free SSL. A framework for building Let's Encrypt v2 clients, and other ACME v2 (draft 11) clients. Successor to le-acme-core.js",
"homepage": "https://git.coolaj86.com/coolaj86/acme-v2.js",
"main": "node.js",