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acme-v2.js
==========
A framework for building letsencrypt clients (and other ACME v2 clients), forked from `le-acme-core.js`.
In progress
* get directory
* get nonce
* create account

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/*!
* 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';
var defaults = {
productionServerUrl: 'https://acme-v02.api.letsencrypt.org/directory'
, stagingServerUrl: 'https://acme-staging-v02.api.letsencrypt.org/directory'
, acmeChallengePrefix: '/.well-known/acme-challenge/'
, knownEndpoints: [ 'keyChange', 'meta', 'newAccount', 'newNonce', 'newOrder', 'revokeCert' ]
, challengeType: 'http-01' // dns-01
, keyType: 'rsa' // ecdsa
, keySize: 2048 // 256
};
function create(deps) {
if (!deps) { deps = {}; }
deps.LeCore = {};
deps.pkg = deps.pkg || require('./package.json');
deps.os = deps.os || require('os');
deps.process = deps.process || require('process');
var uaDefaults = {
pkg: "Greenlock/" + deps.pkg.version
, os: " (" + deps.os.type() + "; " + deps.process.arch + " " + deps.os.platform() + " " + deps.os.release() + ")"
, node: " Node.js/" + deps.process.version
, user: ''
};
//var currentUAProps;
function getUaString() {
var userAgent = '';
//Object.keys(currentUAProps)
Object.keys(uaDefaults).forEach(function (key) {
userAgent += uaDefaults[key];
//userAgent += currentUAProps[key];
});
return userAgent.trim();
}
function getRequest(opts) {
if (!opts) { opts = {}; }
return deps.request.defaults({
headers: {
'User-Agent': opts.userAgent || getUaString()
}
});
}
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 acme2 = {
getAcmeUrls: function () {
var me = this;
return request({ url: directoryUrl }).then(function (resp) {
me._directoryUrls = JSON.parse(resp.body);
me._tos = me._directoryUrls.meta.termsOfService;
return me._directoryUrls;
});
}
, getNonce: function () {
var me = this;
return request({ method: 'HEAD', url: me._directoryUrls.newNonce }).then(function (resp) {
me._nonce = resp.toJSON().headers['replay-nonce'];
return me._nonce;
});
}
// ACME RFC Section 7.3 Account Creation
/*
{
"protected": base64url({
"alg": "ES256",
"jwk": {...},
"nonce": "6S8IqOGY7eL2lsGoTZYifg",
"url": "https://example.com/acme/new-account"
}),
"payload": base64url({
"termsOfServiceAgreed": true,
"onlyReturnExisting": false,
"contact": [
"mailto:cert-admin@example.com",
"mailto:admin@example.com"
]
}),
"signature": "RZPOnYoPs1PhjszF...-nh6X1qtOFPB519I"
}
*/
, registerNewAccount: function () {
var me = this;
var RSA = require('rsa-compat').RSA;
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 options = {
email: 'coolaj86@gmail.com'
, keypair: RSA.import({ privateKeyPem: require('fs').readFileSync(__dirname + '/privkey.pem') })
};
var body = {
termsOfServiceAgreed: true
, onlyReturnExisting: false
, contact: [ 'mailto:' + options.email ]
};
var payload = JSON.stringify(body, null, 2);
var jws = RSA.signJws(
options.keypair
, new Buffer(payload)
, { nonce: me._nonce, alg: 'RS256', url: me._directoryUrls.newAccount, jwk: RSA.exportPublicJwk(options.keypair) }
);
console.log('jws:');
console.log(jws);
return request({
method: 'POST'
, url: me._directoryUrls.newAccount
, headers: { 'Content-Type': 'application/jose+json' }
, json: jws
}).then(function (resp) {
me._nonce = resp.toJSON().headers['replay-nonce'];
console.log(resp.toJSON());
return resp.body;
});
}
};
return acme2;
}
var acme2 = create();
acme2.getAcmeUrls().then(function (body) {
console.log(body);
acme2.getNonce().then(function (nonce) {
console.log(nonce);
acme2.registerNewAccount().then(function (account) {
console.log(account);
});
});
});

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{
"name": "acme-v2",
"version": "1.0.0",
"description": "A framework for building letsencrypt clients (and other ACME v2 clients), forked from le-acme-core.js.",
"main": "node.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"repository": {
"type": "git",
"url": "ssh://gitea@git.coolaj86.com:22042/coolaj86/acme-v2.js.git"
},
"keywords": [
"acmev2",
"acme-v2",
"acme",
"letsencrypt-v2",
"letsencryptv2",
"greenlock",
"greenlock2"
],
"author": "AJ ONeal <coolaj86@gmail.com> (https://coolaj86.com/)",
"license": "(MIT OR Apache-2.0)",
"dependencies": {
"request": "^2.85.0",
"rsa-compat": "^1.2.7"
}
}