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acme.js
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not hard-coded, almost backwards compatible

This commit is contained in:
AJ ONeal 2018-03-21 01:26:23 -06:00
parent e6268c6119
commit 92b494f535
3 changed files with 355 additions and 271 deletions
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60
README.md
View File

@ -18,10 +18,64 @@ In progress
* Mar 20, 2018 - finalize order (submit csr)
* Mar 20, 2018 - poll for status
* Mar 20, 2018 - download certificate
* Mar 20, 2018 - SUCCESS - got a test certificate (hard-coded)
* Mar 21, 2018 - can now accept values (not hard coded)
* Mar 21, 2018 - *mostly* matches le-acme-core.js API
Todo
* match api for acme v1 (le-acme-core.js)
* make not hard-coded
* completely match api for acme v1 (le-acme-core.js)
* test http and dns challenges
* export http and dns challenge tests
* support ECDSA keys
## API
```
var ACME = require('acme-v2.js').ACME.create({
RSA: require('rsa-compat').RSA
});
```
```javascript
// Accounts
ACME.registerNewAccount(options, cb) // returns "regr" registration data
{ email: '<email>' // valid email (server checks MX records)
, accountKeypair: { // privateKeyPem or privateKeyJwt
privateKeyPem: '<ASCII PEM>'
}
, agreeToTerms: fn (tosUrl, cb) {} // must specify agree=tosUrl to continue (or falsey to end)
}
// Registration
ACME.getCertificate(options, cb) // returns (err, pems={ privkey (key), cert, chain (ca) })
{ newAuthzUrl: '<url>' // specify acmeUrls.newAuthz
, newCertUrl: '<url>' // specify acmeUrls.newCert
, domainKeypair: {
privateKeyPem: '<ASCII PEM>'
}
, accountKeypair: {
privateKeyPem: '<ASCII PEM>'
}
, domains: [ 'example.com' ]
, setChallenge: fn (hostname, key, val, cb)
, removeChallenge: fn (hostname, key, cb)
}
// Discovery URLs
ACME.getAcmeUrls(acmeDiscoveryUrl, cb) // returns (err, acmeUrls={newReg,newAuthz,newCert,revokeCert})
```
Helpers & Stuff
```javascript
// Constants
ACME.productionServerUrl // https://acme-v02.api.letsencrypt.org/directory
ACME.stagingServerUrl // https://acme-staging-v02.api.letsencrypt.org/directory
ACME.acmeChallengePrefix // /.well-known/acme-challenge/
```

280
node.js
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@ -2,8 +2,9 @@
* acme-v2.js
* Copyright(c) 2018 AJ ONeal <aj@ppl.family> https://ppl.family
* Apache-2.0 OR MIT (and hence also MPL 2.0)
*/
*/
'use strict';
/* globals Promise */
var defaults = {
productionServerUrl: 'https://acme-v02.api.letsencrypt.org/directory'
@ -52,57 +53,13 @@ function create(deps) {
});
}
var RSA = deps.RSA || require('rsa-compat').RSA;
deps.request = deps.request || require('request');
deps.promisify = deps.promisify || require('util').promisify;
var directoryUrl = deps.directoryUrl || defaults.stagingServerUrl;
var request = deps.promisify(getRequest({}));
var crypto = require('crypto');
RSA.signJws = RSA.generateJws = RSA.generateSignatureJws = RSA.generateSignatureJwk =
function (keypair, payload, nonce) {
var prot = {};
if (nonce) {
if ('string' === typeof nonce) {
prot.nonce = nonce;
} else {
prot = nonce;
}
}
keypair = RSA._internal.import(keypair);
keypair = RSA._internal.importForge(keypair);
keypair.publicKeyJwk = RSA.exportPublicJwk(keypair);
// Compute JWS signature
var protectedHeader = "";
if (Object.keys(prot).length) {
protectedHeader = JSON.stringify(prot); // { alg: prot.alg, nonce: prot.nonce, url: prot.url });
}
var protected64 = RSA.utils.toWebsafeBase64(new Buffer(protectedHeader).toString('base64'));
var payload64 = RSA.utils.toWebsafeBase64(payload.toString('base64'));
var raw = protected64 + "." + payload64;
var sha256Buf = crypto.createHash('sha256').update(raw).digest();
var sig64;
if (RSA._URSA) {
sig64 = RSA._ursaGenerateSig(keypair, sha256Buf);
} else {
sig64 = RSA._forgeGenerateSig(keypair, sha256Buf);
}
return {
/*
header: {
alg: "RS256"
, jwk: keypair.publicKeyJwk
}
*/
protected: protected64
, payload: payload64
, signature: sig64
};
};
var acme2 = {
getAcmeUrls: function () {
var me = this;
@ -114,6 +71,7 @@ function create(deps) {
}
, getNonce: function () {
var me = this;
if (me._nonce) { return new Promise(function (resolve) { resolve(me._nonce); return; }); }
return request({ method: 'HEAD', url: me._directoryUrls.newNonce }).then(function (resp) {
me._nonce = resp.toJSON().headers['replay-nonce'];
return me._nonce;
@ -142,31 +100,53 @@ function create(deps) {
, registerNewAccount: function (options) {
var me = this;
console.log('[acme-v2] registerNewAccount');
return me.getNonce().then(function () {
return new Promise(function (resolve, reject) {
function agree(err, tosUrl) {
if (err) { reject(err); return; }
if (me._tos !== tosUrl) {
err = new Error("You must agree to the ToS at '" + me._tos + "'");
err.code = "E_AGREE_TOS";
reject(err);
return;
}
var jwk = RSA.exportPublicJwk(options.accountKeypair);
var body = {
termsOfServiceAgreed: true
termsOfServiceAgreed: tosUrl === me._tos
, onlyReturnExisting: false
, contact: [ 'mailto:' + options.email ]
/*
"externalAccountBinding": {
"protected": base64url({
"alg": "HS256",
"kid": /* key identifier from CA *//*,
"url": "https://example.com/acme/new-account"
}),
"payload": base64url(/* same as in "jwk" above *//*),
"signature": /* MAC using MAC key from CA *//*
}
*/
};
var payload = JSON.stringify(body, null, 2);
if (options.externalAccount) {
body.externalAccountBinding = RSA.signJws(
options.externalAccount.secret
, undefined
, { alg: "HS256"
, kid: options.externalAccount.id
, url: me._directoryUrls.newAccount
}
, new Buffer(JSON.stringify(jwk))
);
}
var payload = JSON.stringify(body);
var jws = RSA.signJws(
options.keypair
options.accountKeypair
, undefined
, { nonce: me._nonce
, alg: 'RS256'
, url: me._directoryUrls.newAccount
, jwk: jwk
}
, new Buffer(payload)
, { nonce: me._nonce, alg: 'RS256', url: me._directoryUrls.newAccount, jwk: RSA.exportPublicJwk(options.keypair) }
);
console.log('jws:');
console.log('[acme-v2] registerNewAccount JSON body:');
delete jws.header;
console.log(jws);
me._nonce = null;
return request({
method: 'POST'
, url: me._directoryUrls.newAccount
@ -174,11 +154,18 @@ function create(deps) {
, json: jws
}).then(function (resp) {
me._nonce = resp.toJSON().headers['replay-nonce'];
var location = resp.toJSON().headers['location'];
var location = resp.toJSON().headers.location;
console.log('[DEBUG] new account location:'); // the account id url
console.log(location); // the account id url
console.log(resp.toJSON());
me._kid = location;
return resp.body;
}).then(resolve);
}
console.log('[acme-v2] agreeToTerms');
options.agreeToTerms(me._tos, agree);
});
});
}
/*
@ -204,26 +191,18 @@ function create(deps) {
, _getChallenges: function (options, auth) {
console.log('\n[DEBUG] getChallenges\n');
return request({ method: 'GET', url: auth, json: true }).then(function (resp) {
console.log('Authorization:');
console.log(resp.body.challenges);
return resp.body.challenges;
return resp.body;
});
}
// https://tools.ietf.org/html/draft-ietf-acme-acme-10#section-7.5.1
, _postChallenge: function (options, ch) {
, _postChallenge: function (options, identifier, ch) {
var me = this;
var body = { };
var payload = JSON.stringify(body);
//var payload = JSON.stringify(body, null, 2);
var jws = RSA.signJws(
options.keypair
, new Buffer(payload)
, { nonce: me._nonce, alg: 'RS256', url: ch.url, kid: me._kid }
);
var thumbprint = RSA.thumbprint(options.keypair);
var thumbprint = RSA.thumbprint(options.accountKeypair);
var keyAuthorization = ch.token + '.' + thumbprint;
// keyAuthorization = token || '.' || base64url(JWK_Thumbprint(accountKey))
// /.well-known/acme-challenge/:token
@ -235,15 +214,39 @@ function create(deps) {
console.log(thumbprint);
console.log('keyAuthorization:');
console.log(keyAuthorization);
/*
options.setChallenge(ch.token, thumbprint, keyAuthorization, function (err) {
});
*/
return new Promise(function (resolve, reject) {
if (options.setupChallenge) {
options.setupChallenge(
{ identifier: identifier
, hostname: identifier.value
, type: ch.type
, token: ch.token
, thumbprint: thumbprint
, keyAuthorization: keyAuthorization
, dnsAuthorization: RSA.utils.toWebsafeBase64(
require('crypto').createHash('sha256').update(keyAuthorization).digest('base64')
)
}
, testChallenge
);
} else {
options.setChallenge(identifier.value, ch.token, keyAuthorization, testChallenge);
}
function testChallenge(err) {
if (err) { reject(err); return; }
// TODO put check dns / http checks here?
// http-01: GET https://example.org/.well-known/acme-challenge/{{token}} => {{keyAuth}}
// dns-01: TXT _acme-challenge.example.org. => "{{urlSafeBase64(sha256(keyAuth))}}"
function wait(ms) {
return new Promise(function (resolve) {
setTimeout(resolve, (ms || 1100));
});
}
function pollStatus() {
console.log('\n[DEBUG] statusChallenge\n');
return request({ method: 'GET', url: ch.url, json: true }).then(function (resp) {
@ -257,6 +260,19 @@ function create(deps) {
if ('valid' === resp.body.status) {
console.log('poll: valid');
try {
if (options.teardownChallenge) {
options.teardownChallenge(
{ identifier: identifier
, type: ch.type
, token: ch.token
}
, function () {}
);
} else {
options.removeChallenge(identifier.value, ch.token, function () {});
}
} catch(e) {}
return resp.body;
}
@ -269,6 +285,8 @@ function create(deps) {
else {
console.error("[acme-v2] (z) bad challenge state:");
}
return Promise.reject(new Error("[acme-v2] bad challenge state"));
});
}
@ -276,6 +294,13 @@ function create(deps) {
//console.log('\n[DEBUG] stop to fix things\n'); return;
function post() {
var jws = RSA.signJws(
options.accountKeypair
, undefined
, { nonce: me._nonce, alg: 'RS256', url: ch.url, kid: me._kid }
, new Buffer(payload)
);
me._nonce = null;
return request({
method: 'POST'
, url: ch.url
@ -285,17 +310,19 @@ function create(deps) {
me._nonce = resp.toJSON().headers['replay-nonce'];
console.log('respond to challenge: resp.body:');
console.log(resp.body);
return wait().then(pollStatus);
return wait().then(pollStatus).then(resolve, reject);
});
}
return wait(20 * 1000).then(post);
}
});
}
, _finalizeOrder: function (options, validatedDomains) {
console.log('finalizeOrder:');
var me = this;
var csr = RSA.generateCsrWeb64(options.certificateKeypair, validatedDomains);
var csr = RSA.generateCsrWeb64(options.domainKeypair, validatedDomains);
var body = { csr: csr };
var payload = JSON.stringify(body);
@ -306,14 +333,15 @@ function create(deps) {
}
function pollCert() {
//var payload = JSON.stringify(body, null, 2);
var jws = RSA.signJws(
options.keypair
, new Buffer(payload)
options.accountKeypair
, undefined
, { nonce: me._nonce, alg: 'RS256', url: me._finalize, kid: me._kid }
, new Buffer(payload)
);
console.log('finalize:', me._finalize);
me._nonce = null;
return request({
method: 'POST'
, url: me._finalize
@ -348,7 +376,7 @@ function create(deps) {
return pollCert();
}
, _getCertificate: function (auth) {
, _getCertificate: function () {
var me = this;
return request({ method: 'GET', url: me._certificate, json: true }).then(function (resp) {
console.log('Certificate:');
@ -357,28 +385,37 @@ function create(deps) {
});
}
, getCertificate: function (options, cb) {
console.log('[acme-v2] DEBUG get cert 1');
var me = this;
if (!options.challengeTypes) {
if (!options.challengeType) {
cb(new Error("challenge type must be specified"));
return Promise.reject(new Error("challenge type must be specified"));
}
options.challengeTypes = [ options.challengeType ];
}
console.log('[acme-v2] getCertificate');
return me.getNonce().then(function () {
var body = {
identifiers: [
{ type: "dns" , value: "test.ppl.family" }
/*
, { type: "dns" , value: "example.net" }
*/
]
identifiers: options.domains.map(function (hostname) {
return { type: "dns" , value: hostname };
})
//, "notBefore": "2016-01-01T00:00:00Z"
//, "notAfter": "2016-01-08T00:00:00Z"
};
var payload = JSON.stringify(body);
//var payload = JSON.stringify(body, null, 2);
var jws = RSA.signJws(
options.keypair
, new Buffer(payload)
options.accountKeypair
, undefined
, { nonce: me._nonce, alg: 'RS256', url: me._directoryUrls.newOrder, kid: me._kid }
, new Buffer(payload)
);
console.log('\n[DEBUG] newOrder\n');
me._nonce = null;
return request({
method: 'POST'
, url: me._directoryUrls.newOrder
@ -386,7 +423,7 @@ function create(deps) {
, json: jws
}).then(function (resp) {
me._nonce = resp.toJSON().headers['replay-nonce'];
var location = resp.toJSON().headers['location'];
var location = resp.toJSON().headers.location;
console.log(location); // the account id url
console.log(resp.toJSON());
//var body = JSON.parse(resp.body);
@ -396,19 +433,25 @@ function create(deps) {
//console.log('[DEBUG] finalize:', me._finalize); return;
//return resp.body;
return Promise.all(me._authorizations.map(function (auth) {
console.log('authz', auth);
return me._getChallenges(options, auth).then(function (challenges) {
var chp;
challenges.forEach(function (ch) {
if ('http-01' !== ch.type) {
return;
}
chp = me._postChallenge(options, ch);
return Promise.all(me._authorizations.map(function (authUrl) {
return me._getChallenges(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;
});
})[0];
var challenge = results.challenges.filter(function (ch) {
if (chType === ch.type) {
return ch;
}
})[0];
return chp;
if (!challenge) {
return Promise.reject(new Error("Server didn't offer any challenge we can handle."));
}
return me._postChallenge(options, results.identifier, challenge);
});
})).then(function () {
var validatedDomains = body.identifiers.map(function (ident) {
@ -417,7 +460,8 @@ function create(deps) {
return me._finalizeOrder(options, validatedDomains);
}).then(function () {
return me._getCertificate();
return me._getCertificate().then(function (result) { cb(null, result); return result; }, cb);
});
});
});
}
@ -425,23 +469,9 @@ function create(deps) {
return acme2;
}
var RSA = require('rsa-compat').RSA;
var acme2 = create();
acme2.getAcmeUrls().then(function (body) {
console.log(body);
acme2.getNonce().then(function (nonce) {
console.log(nonce);
var options = {
email: 'coolaj86@gmail.com'
, keypair: RSA.import({ privateKeyPem: require('fs').readFileSync(__dirname + '/account.privkey.pem') })
, certificateKeypair: RSA.import({ privateKeyPem: require('fs').readFileSync(__dirname + '/privkey.pem') })
};
acme2.registerNewAccount(options).then(function (account) {
console.log(account);
acme2.getCertificate(options, function () {
console.log('got cert');
});
});
});
module.exports.ACME = {
create: create
};
Object.keys(defaults).forEach(function (key) {
module.exports.ACME[key] = defaults[key];
});

4
package.json
View File

@ -1,6 +1,6 @@
{
"name": "acme-v2",
"version": "0.0.2",
"version": "0.6.0",
"description": "A framework for building letsencrypt clients (and other ACME v2 clients), forked from le-acme-core.js.",
"main": "node.js",
"scripts": {
@ -23,6 +23,6 @@
"license": "(MIT OR Apache-2.0)",
"dependencies": {
"request": "^2.85.0",
"rsa-compat": "^1.2.7"
"rsa-compat": "^1.3.0"
}
}