384 lines
11 KiB
JavaScript
384 lines
11 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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module.exports.create = function (deps) {
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var request=deps.request;
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var toStandardB64 = deps.leUtils.toStandardB64;
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var importPemPrivateKey = deps.leCrypto.importPemPrivateKey;
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var thumbprinter = deps.leCrypto.thumbprint;
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var generateCsr = deps.leCrypto.generateCsr || deps.leCrypto.generateCSR;
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var Acme = deps.Acme;
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function getCert(options, cb) {
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var NOOP = function () {};
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var log = options.debug ? console.log : NOOP;
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var state={
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validatedDomains:[]
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, validAuthorizationUrls:[]
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, newAuthzUrl: options.newAuthzUrl
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, newCertUrl: options.newCertUrl
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};
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if (!options.newAuthzUrl) {
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return handleErr(new Error("options.newAuthzUrl must be the authorization url"));
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}
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if (!options.newCertUrl) {
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return handleErr(new Error("options.newCertUrl must be the new certificate url"));
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}
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if (!options.accountPrivateKeyPem) {
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return handleErr(new Error("options.accountPrivateKeyPem must be an ascii private key pem"));
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}
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if (!options.domainPrivateKeyPem) {
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return handleErr(new Error("options.domainPrivateKeyPem must be an ascii private key pem"));
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}
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if (!options.setChallenge) {
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return handleErr(new Error("options.setChallenge must be function(hostname, challengeKey, tokenValue, done) {}"));
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}
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if (!options.removeChallenge) {
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return handleErr(new Error("options.removeChallenge must be function(hostname, challengeKey, done) {}"));
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}
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if (!(options.domains && options.domains.length)) {
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return handleErr(new Error("options.domains must be an array of domains such as ['example.com', 'www.example.com']"));
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}
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state.domains = options.domains.slice(0); // copy array
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try {
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state.accountKeyPem=options.accountPrivateKeyPem;
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state.accountKeyPair=importPemPrivateKey(state.accountKeyPem);
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state.acme=new Acme(state.accountKeyPair);
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state.certPrivateKeyPem=options.domainPrivateKeyPem;
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state.certPrivateKey=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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function bodyToError(res, body) {
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var err;
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if (!body) {
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err = new Error("[Error] letiny-core: no request body");
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err.code = "E_NO_RESPONSE_BODY";
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throw err;
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}
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if ('{' === body[0] || '{' === String.fromCharCode(body[0])) {
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try {
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body = JSON.parse(body.toString('utf8'));
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} catch(e) {
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err = new Error("[Error] letiny-core: body could not be parsed");
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err.code = "E_BODY_PARSE";
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err.description = body;
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throw err;
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}
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}
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if (Math.floor(res.statusCode / 100) !== 2) {
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err = new Error("[Error] letiny-core: not 200 ok");
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err.code = "E_STATUS_CODE";
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err.type = body.type
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err.description = body;
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err.detail = body.detail;
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throw err;
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}
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if (body.type && body.detail) {
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err = new Error("[Error] letiny-core: " + body.detail);
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err.code = body.type;
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err.type = body.type;
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err.description = body.detail;
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err.detail = body.detail;
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throw err;
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}
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return body;
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}
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nextDomain();
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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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state.acme.post(state.newAuthzUrl, {
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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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}, function (err, res, body) {
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if (!err && res.body) {
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try {
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body = bodyToError(res, body);
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} catch(e) {
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err = e;
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}
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}
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getReadyToValidate(err, res, body)
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});
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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) {
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return handleErr(err);
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}
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if (Math.floor(res.statusCode/100)!==2) {
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return handleErr(null, 'Authorization request failed ('+res.statusCode+')');
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}
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links=Acme.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.newCertUrl=links.next;
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authz=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=thumbprinter(state.accountKeyPair.publicKey);
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keyAuthorization=challenge.token+'.'+thumbprint;
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state.responseUrl=challenge.uri;
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options.setChallenge(state.domain, challenge.token, keyAuthorization, challengeDone);
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function challengeDone(err) {
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if (err) {
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console.error('[letiny-core] setChallenge Error:');
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console.error(err && err.stack || err);
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ensureValidation(err, null, null, function () {
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options.removeChallenge(state.domain, challenge.token, function () {
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// ignore
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});
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});
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return;
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}
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state.acme.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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if (!err && res.body) {
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try {
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body = bodyToError(res, body);
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} catch(e) {
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err = e;
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}
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}
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ensureValidation(err, res, body, function unlink() {
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options.removeChallenge(state.domain, challenge.token, function () {
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// ignore
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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, challengesState;
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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 ('
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+ (res && res.statusCode || err.code || err.message || err) + ')');
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}
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authz=body;
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if (authz.status==='pending') {
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setTimeout(function() {
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request({
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method: 'GET'
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, url: state.authorizationUrl
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}, function(err, res, body) {
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if (!err && res.body) {
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try {
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body = bodyToError(res, body);
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} catch(e) {
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err = e;
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}
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}
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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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challengesState = authz.challenges.map(function (challenge) {
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var result = ' - ' + challenge.uri + ' [' + challenge.status + ']';
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if (challenge.error) {
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result += '\n ' + challenge.error.detail;
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}
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return result;
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}).join('\n');
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return handleErr(null,
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'The CA was unable to validate the file you provisioned. '
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+ (authz.detail ? 'Details: ' + authz.detail : '')
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+ (challengesState ? '\n' + challengesState : ''), 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.detail, authz);
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}
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}
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function getCertificate() {
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var csr=generateCsr(state.certPrivateKey, state.validatedDomains);
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log('Requesting certificate...');
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state.acme.post(state.newCertUrl, {
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resource:'new-cert',
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csr:csr,
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authorizations:state.validAuthorizationUrls
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}, function (err, res, body ) {
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if (!err && res.body) {
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try {
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body = bodyToError(res, body);
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} catch(e) {
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err = e;
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}
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}
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downloadCertificate(err, res, body);
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});
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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) {
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handleErr(err, 'Certificate request failed');
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return;
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}
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if (Math.floor(res.statusCode/100)!==2) {
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err = new Error("invalid status code: " + res.statusCode);
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err.code = "E_STATUS_CODE";
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err.description = body;
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handleErr(err);
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return;
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}
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links=Acme.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({
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method: '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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try {
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body = bodyToError(res, body);
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} catch(e) {
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err = e;
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}
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}
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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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return handleErr(null, 'Cert at '+certUrl+' did not match returned cert');
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}
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log('Successfully verified cert at '+certUrl);
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log('Requesting issuer certificate...');
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request({
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method: '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) {
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try {
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body = bodyToError(res, body);
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} catch(e) {
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err = e;
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}
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}
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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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function done() {
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var cert;
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try {
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cert=certBufferToPem(state.certificate);
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} catch(e) {
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console.error(e.stack);
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//cb(new Error("Could not write output files. Please check permissions!"));
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handleErr(e, 'Could not write output files. Please check permissions!');
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return;
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}
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cb(null, {
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cert: cert
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, key: state.certPrivateKeyPem
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, ca: state.caCert
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});
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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=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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return getCert;
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};
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