539 lines
14 KiB
JavaScript
539 lines
14 KiB
JavaScript
/*!
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* letiny
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* Copyright(c) 2015 Anatol Sommer <anatol@anatol.at>
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* Some code used from https://github.com/letsencrypt/boulder/tree/master/test/js
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* MPL 2.0
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*/
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'use strict';
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var _DEBUG, NOOP=new Function(), log=NOOP,
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mkdirp=require('mkdirp').sync, request=require('request'),
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forge=require('node-forge'), pki=forge.pki,
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cryptoUtil=require('./crypto-util'), util=require('./acme-util'),
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fs=require('fs'), path=require('path'), child=require('child_process');
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function Acme(privateKey) {
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this.privateKey=privateKey;
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this.nonces=[];
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}
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Acme.prototype.getNonce=function(url, cb) {
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var self=this;
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request.head({
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url:url,
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}, function(err, res, body) {
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if (err) {
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return cb(err);
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}
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if (res && 'replay-nonce' in res.headers) {
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log('Storing nonce: '+res.headers['replay-nonce']);
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self.nonces.push(res.headers['replay-nonce']);
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cb();
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return;
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}
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cb(new Error('Failed to get nonce for request'));
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});
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};
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Acme.prototype.post=function(url, body, cb) {
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var self=this, payload, jws, signed;
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if (this.nonces.length===0) {
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this.getNonce(url, function(err) {
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if (err) {
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return cb(err);
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}
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self.post(url, body, cb);
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});
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return;
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}
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log('Using nonce: '+this.nonces[0]);
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payload=JSON.stringify(body, null, 2);
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jws=cryptoUtil.generateSignature(
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this.privateKey, new Buffer(payload), this.nonces.shift()
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);
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signed=JSON.stringify(jws, null, 2);
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log('Posting to '+url);
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log(signed.green);
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log('Payload:'+payload.blue);
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return request.post({
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url:url,
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body:signed,
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encoding:null
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}, function(err, res, body) {
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var parsed;
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if (err) {
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console.error(err);
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return cb(err);
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}
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if (res) {
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log(('HTTP/1.1 '+res.statusCode).yellow);
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}
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Object.keys(res.headers).forEach(function(key) {
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var value, upcased;
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value=res.headers[key];
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upcased=key.charAt(0).toUpperCase()+key.slice(1);
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log((upcased+': '+value).yellow);
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});
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if (body && !body.toString().match(/[^\x00-\x7F]/)) {
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try {
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parsed=JSON.parse(body);
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log(JSON.stringify(parsed, null, 2).cyan);
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} catch(err) {
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log(body.toString().cyan);
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}
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}
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if ('replay-nonce' in res.headers) {
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log('Storing nonce: '+res.headers['replay-nonce']);
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self.nonces.push(res.headers['replay-nonce']);
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}
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cb(err, res, body);
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});
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};
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function getCert(options, cb) {
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var state={
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validatedDomains:[],
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validAuthorizationURLs:[]
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};
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options.newReg=options.newReg || 'https://acme-v01.api.letsencrypt.org/acme/new-reg';
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if (!options.email) {
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return cb(new Error('No "email" option specified!'));
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}
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if (typeof options.domains==='string') {
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state.domains=options.domains.split(/[, ]+/);
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} else if (options.domains && options.domains instanceof Array) {
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state.domains=options.domains.slice();
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} else {
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return cb(new Error('No valid "domains" option specified!'));
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}
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if ((_DEBUG=options.debug)) {
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if (!''.green) {
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require('colors');
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}
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log=console.log.bind(console);
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} else {
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log=NOOP;
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}
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if (options.fork && !~process.argv.indexOf('--letiny-fork')) {
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state.child=child.fork(__filename, ['--letiny-fork']);
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if (options.challenge) {
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return cb(new Error('fork+challenge not supported yet'));
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}
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state.child.send({request:options});
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state.child.on('message', function(msg) {
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var res;
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if (msg.result) {
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res=msg.result;
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cb(res.err ? new Error(res.err) : null, res.cert, res.key, res.ca);
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}
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});
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return;
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}
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if (options.accountKey) {
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if (options.accountKey.length>255) {
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state.accountKeyPEM=options.accountKey;
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} else {
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try {
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state.accountKeyPEM=fs.readFileSync(options.accountKey);
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} catch(err) {
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if (err.code==='ENOENT') {
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makeAccountKeyPair(true);
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} else {
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return handleErr(err, 'Failed to load accountKey');
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}
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}
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try {
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state.accountKeyPair=cryptoUtil.importPemPrivateKey(state.accountKeyPEM);
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} catch(err) {
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return handleErr(err, 'Failed to parse accountKey');
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}
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initAcme();
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}
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} else {
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makeAccountKeyPair();
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}
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function makeAccountKeyPair(save) {
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var keypair;
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log('Generating account keypair...');
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keypair=pki.rsa.generateKeyPair(2048);
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state.accountKeyPEM=pki.privateKeyToPem(keypair.privateKey);
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state.accountKeyPair=cryptoUtil.importPemPrivateKey(state.accountKeyPEM);
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if (save) {
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try {
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fs.writeFileSync(options.accountKey, state.accountKeyPEM);
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} catch(err) {
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return handleErr(err, 'Failed to save accountKey');
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}
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}
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initAcme();
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}
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function initAcme() {
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state.acme=new Acme(state.accountKeyPair);
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makeKeyPair();
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}
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function makeKeyPair() {
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var keypair;
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if (options.privateKey) {
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state.certPrivateKeyPEM=options.privateKey;
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} else {
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log('Generating cert keypair...');
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keypair=pki.rsa.generateKeyPair(2048);
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state.certPrivateKeyPEM=pki.privateKeyToPem(keypair.privateKey);
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}
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try {
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state.certPrivateKey=cryptoUtil.importPemPrivateKey(state.certPrivateKeyPEM);
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} catch(err) {
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return handleErr(err, 'Failed to parse privateKey');
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}
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register();
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}
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function register() {
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post(options.newReg, {
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resource:'new-reg',
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contact:['mailto:'+options.email]
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}, getTerms);
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}
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function getTerms(err, res) {
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var links;
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if (err || Math.floor(res.statusCode/100)!==2) {
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return handleErr(err, 'Registration request failed');
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}
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links=parseLink(res.headers['link']);
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if (!links || !('next' in links)) {
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return handleErr(err, 'Server didn\'t provide information to proceed (1)');
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}
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state.registrationURL=res.headers['location'];
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state.newAuthorizationURL=links['next'];
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state.termsRequired=('terms-of-service' in links);
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if (state.termsRequired) {
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state.termsURL=links['terms-of-service'];
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log(state.termsURL);
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request.get(state.termsURL, getAgreement);
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} else {
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getChallenges();
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}
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}
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function getAgreement(err, res, body) {
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if (err) {
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return handleErr(err, 'Couldn\'t get agreement');
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}
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log('The CA requires your agreement to terms:\n'+state.termsURL);
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sendAgreement();
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}
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function sendAgreement() {
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if (state.termsRequired && !options.agreeTerms) {
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return handleErr(null, 'The CA requires your agreement to terms: '+state.termsURL);
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}
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log('Posting agreement to: '+state.registrationURL);
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post(state.registrationURL, {
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resource:'reg',
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agreement:state.termsURL
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}, function(err, res, body) {
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if (err || Math.floor(res.statusCode/100)!==2) {
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return handleErr(err, 'Couldn\'t POST agreement back to server', body);
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} else {
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nextDomain();
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}
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});
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}
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function nextDomain() {
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if (state.domains.length > 0) {
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getChallenges(state.domains.shift());
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return;
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} else {
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getCertificate();
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}
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}
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function getChallenges(domain) {
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state.domain=domain;
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post(state.newAuthorizationURL, {
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resource:'new-authz',
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identifier:{
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type:'dns',
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value:state.domain,
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}
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}, getReadyToValidate);
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}
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function getReadyToValidate(err, res, body) {
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var links, authz, httpChallenges, challenge, thumbprint, keyAuthorization, challengePath;
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if (err || Math.floor(res.statusCode/100)!==2) {
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return handleErr(err, 'Authorization request failed ('+res.statusCode+')');
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}
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links=parseLink(res.headers['link']);
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if (!links || !('next' in links)) {
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return handleErr(err, 'Server didn\'t provide information to proceed (2)');
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}
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state.authorizationURL=res.headers['location'];
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state.newCertificateURL=links['next'];
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authz=JSON.parse(body);
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httpChallenges=authz.challenges.filter(function(x) {
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return x.type==='http-01';
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});
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if (httpChallenges.length===0) {
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return handleErr(null, 'Server didn\'t offer any challenge we can handle.');
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}
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challenge=httpChallenges[0];
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thumbprint=cryptoUtil.thumbprint(state.accountKeyPair.publicKey);
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keyAuthorization=challenge.token+'.'+thumbprint;
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challengePath='.well-known/acme-challenge/'+challenge.token;
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state.responseURL=challenge['uri'];
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state.path=challengePath;
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if (options.webroot) {
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try {
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mkdirp(path.dirname(options.webroot+'/'+challengePath));
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fs.writeFileSync(path.normalize(options.webroot+'/'+challengePath), keyAuthorization);
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challengeDone();
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} catch(err) {
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handleErr(err, 'Could not write challange file to disk');
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}
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} else if (typeof options.challenge==='function') {
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options.challenge(state.domain, '/'+challengePath, keyAuthorization, challengeDone);
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} else {
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return handleErr(null, 'No "challenge" function or "webroot" option given.');
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}
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function challengeDone() {
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post(state.responseURL, {
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resource:'challenge',
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keyAuthorization:keyAuthorization
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}, function(err, res, body) {
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ensureValidation(err, res, body, function unlink() {
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if (options.webroot) {
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fs.unlinkSync(path.normalize(options.webroot+'/'+challengePath));
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}
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});
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});
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}
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}
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function ensureValidation(err, res, body, unlink) {
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var authz;
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if (err || Math.floor(res.statusCode/100)!==2) {
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unlink();
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return handleErr(err, 'Authorization status request failed ('+res.statusCode+')');
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}
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authz=JSON.parse(body);
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if (authz.status==='pending') {
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setTimeout(function() {
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request.get(state.authorizationURL, {}, function(err, res, body) {
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ensureValidation(err, res, body, unlink);
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});
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}, 1000);
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} else if (authz.status==='valid') {
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log('Validating domain ... done');
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state.validatedDomains.push(state.domain);
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state.validAuthorizationURLs.push(state.authorizationURL);
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unlink();
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nextDomain();
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} else if (authz.status==='invalid') {
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unlink();
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return handleErr(null, 'The CA was unable to validate the file you provisioned', body);
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} else {
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unlink();
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return handleErr(null, 'CA returned an authorization in an unexpected state', authz);
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}
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}
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function getCertificate() {
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var csr=cryptoUtil.generateCSR(state.certPrivateKey, state.validatedDomains);
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log('Requesting certificate...');
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post(state.newCertificateURL, {
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resource:'new-cert',
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csr:csr,
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authorizations:state.validAuthorizationURLs
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}, downloadCertificate);
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}
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function downloadCertificate(err, res, body) {
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var links, certURL;
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if (err || Math.floor(res.statusCode/100)!==2) {
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log('Certificate request failed with error ', err);
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if (body) {
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log(body.toString());
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}
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return handleErr(err, 'Certificate request failed');
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}
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links=parseLink(res.headers['link']);
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if (!links || !('up' in links)) {
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return handleErr(err, 'Failed to fetch issuer certificate');
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}
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log('Requesting certificate: done');
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state.certificate=body;
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certURL=res.headers['location'];
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request.get({
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url:certURL,
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encoding:null
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}, function(err, res, body) {
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if (err) {
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return handleErr(err, 'Failed to fetch cert from '+certURL);
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}
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if (res.statusCode!==200) {
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return handleErr(err, 'Failed to fetch cert from '+certURL, res.body.toString());
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}
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if (body.toString()!==state.certificate.toString()) {
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handleErr(null, 'Cert at '+certURL+' did not match returned cert');
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} else {
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log('Successfully verified cert at '+certURL);
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log('Requesting issuer certificate...');
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request.get({
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url:links['up'],
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encoding:null
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}, function(err, res, body) {
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if (err || res.statusCode!==200) {
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return handleErr(err, 'Failed to fetch issuer certificate');
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}
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state.caCert=certBufferToPEM(body);
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log('Requesting issuer certificate: done');
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done();
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});
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}
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});
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}
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function done() {
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var cert, pfx;
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try {
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cert=certBufferToPEM(state.certificate);
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if (options.certFile) {
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fs.writeFileSync(options.certFile, cert);
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}
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if (options.keyFile) {
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fs.writeFileSync(options.keyFile, state.certPrivateKeyPEM);
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}
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if (options.caFile) {
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fs.writeFileSync(options.caFile, state.caCert);
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}
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if (options.pfxFile) {
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try {
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pfx=forge.pkcs12.toPkcs12Asn1(
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pki.privateKeyFromPem(state.certPrivateKeyPEM),
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[pki.certificateFromPem(cert), pki.certificateFromPem(state.caCert)],
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options.pfxPassword || '',
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options.aes ? {} : {algorithm:'3des'}
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);
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pfx=new Buffer(forge.asn1.toDer(pfx).toHex(), 'hex');
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} catch(err) {
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handleErr(err, 'Could not convert to PKCS#12');
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}
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fs.writeFileSync(options.pfxFile, pfx);
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}
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cb(null, cert, state.certPrivateKeyPEM, state.caCert);
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} catch(err) {
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handleErr(err, 'Could not write output files. Please check permissions!');
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}
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}
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function post(url, body, cb) {
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return state.acme.post(url, body, cb);
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}
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function handleErr(err, text, info) {
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log(text, err, info);
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cb(err || new Error(text));
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}
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}
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function certBufferToPEM(cert) {
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cert=util.toStandardB64(cert.toString('base64'));
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cert=cert.match(/.{1,64}/g).join('\n');
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return '-----BEGIN CERTIFICATE-----\n'+cert+'\n-----END CERTIFICATE-----';
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}
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function parseLink(link) {
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var links;
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try {
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links=link.split(',').map(function(link) {
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var parts, url, info;
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parts=link.trim().split(';');
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url=parts.shift().replace(/[<>]/g, '');
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info=parts.reduce(function(acc, p) {
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var m=p.trim().match(/(.+) *= *"(.+)"/);
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if (m) {
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acc[m[1]]=m[2];
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}
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return acc;
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}, {});
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info['url']=url;
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return info;
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}).reduce(function(acc, link) {
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if ('rel' in link) {
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acc[link['rel']]=link['url'];
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}
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return acc;
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}, {});
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return links;
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} catch(err) {
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return null;
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}
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}
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if (~process.argv.indexOf('--letiny-fork')) {
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process.on('message', function(msg) {
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if (msg.request) {
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getCert(msg.request.options, function(err, cert, key, ca) {
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process.send({
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result:{
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err:err ? err.stack : null,
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cert:cert,
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key:key,
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ca:ca
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}
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});
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});
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}
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});
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}
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exports.getCert=getCert;
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