700 lines
17 KiB
JavaScript
700 lines
17 KiB
JavaScript
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/*global CSR*/
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// CSR takes a while to load after the page load
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(function (exports) {
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'use strict';
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var BACME = exports.ACME = {};
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var webFetch = exports.fetch;
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var Keypairs = exports.Keypairs;
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var Promise = exports.Promise;
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var directoryUrl = 'https://acme-staging-v02.api.letsencrypt.org/directory';
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var directory;
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var nonceUrl;
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var nonce;
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var accountKeypair;
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var accountJwk;
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var accountUrl;
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BACME.challengePrefixes = {
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'http-01': '/.well-known/acme-challenge'
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, 'dns-01': '_acme-challenge'
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};
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BACME._logHeaders = function (resp) {
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console.log('Headers:');
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Array.from(resp.headers.entries()).forEach(function (h) { console.log(h[0] + ': ' + h[1]); });
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};
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BACME._logBody = function (body) {
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console.log('Body:');
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console.log(JSON.stringify(body, null, 2));
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console.log('');
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};
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BACME.directory = function (opts) {
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return webFetch(opts.directoryUrl || directoryUrl, { mode: 'cors' }).then(function (resp) {
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BACME._logHeaders(resp);
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return resp.json().then(function (reply) {
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if (/error/.test(reply.type)) {
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return Promise.reject(new Error(reply.detail || reply.type));
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}
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directory = reply;
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nonceUrl = directory.newNonce || 'https://acme-staging-v02.api.letsencrypt.org/acme/new-nonce';
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accountUrl = directory.newAccount || 'https://acme-staging-v02.api.letsencrypt.org/acme/new-account';
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orderUrl = directory.newOrder || "https://acme-staging-v02.api.letsencrypt.org/acme/new-order";
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BACME._logBody(reply);
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return reply;
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});
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});
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};
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BACME.nonce = function () {
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return webFetch(nonceUrl, { mode: 'cors' }).then(function (resp) {
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BACME._logHeaders(resp);
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nonce = resp.headers.get('replay-nonce');
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console.log('Nonce:', nonce);
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// resp.body is empty
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return resp.headers.get('replay-nonce');
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});
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};
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BACME.accounts = {};
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// type = ECDSA
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// bitlength = 256
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BACME.accounts.generateKeypair = function (opts) {
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return BACME.generateKeypair(opts).then(function (result) {
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accountKeypair = result;
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return webCrypto.subtle.exportKey(
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"jwk"
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, result.privateKey
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).then(function (privJwk) {
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accountJwk = privJwk;
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console.log('private jwk:');
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console.log(JSON.stringify(privJwk, null, 2));
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return privJwk;
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/*
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return webCrypto.subtle.exportKey(
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"pkcs8"
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, result.privateKey
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).then(function (keydata) {
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console.log('pkcs8:');
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console.log(Array.from(new Uint8Array(keydata)));
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return privJwk;
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//return accountKeypair;
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});
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*/
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});
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});
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};
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// json to url-safe base64
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BACME._jsto64 = function (json) {
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return btoa(JSON.stringify(json)).replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/g, '');
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};
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var textEncoder = new TextEncoder();
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BACME._importKey = function (jwk) {
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var alg; // I think the 256 refers to the hash
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var wcOpts = {};
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var extractable = true; // TODO make optionally false?
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var priv = jwk;
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var pub;
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// ECDSA
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if (/^EC/i.test(jwk.kty)) {
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wcOpts.name = 'ECDSA';
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wcOpts.namedCurve = jwk.crv;
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alg = 'ES256';
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pub = {
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crv: priv.crv
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, kty: priv.kty
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, x: priv.x
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, y: priv.y
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};
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if (!priv.d) {
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priv = null;
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}
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}
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// RSA
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if (/^RS/i.test(jwk.kty)) {
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wcOpts.name = 'RSASSA-PKCS1-v1_5';
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wcOpts.hash = { name: "SHA-256" };
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alg = 'RS256';
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pub = {
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e: priv.e
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, kty: priv.kty
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, n: priv.n
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};
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if (!priv.p) {
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priv = null;
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}
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}
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return window.crypto.subtle.importKey(
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"jwk"
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, pub
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, wcOpts
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, extractable
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, [ "verify" ]
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).then(function (publicKey) {
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function give(privateKey) {
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return {
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wcPub: publicKey
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, wcKey: privateKey
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, wcKeypair: { publicKey: publicKey, privateKey: privateKey }
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, meta: {
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alg: alg
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, name: wcOpts.name
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, hash: wcOpts.hash
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}
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, jwk: jwk
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};
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}
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if (!priv) {
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return give();
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}
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return window.crypto.subtle.importKey(
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"jwk"
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, priv
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, wcOpts
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, extractable
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, [ "sign"/*, "verify"*/ ]
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).then(give);
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});
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};
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BACME._sign = function (opts) {
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var wcPrivKey = opts.abstractKey.wcKeypair.privateKey;
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var wcOpts = opts.abstractKey.meta;
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var alg = opts.abstractKey.meta.alg; // I think the 256 refers to the hash
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var signHash;
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console.log('kty', opts.abstractKey.jwk.kty);
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signHash = { name: "SHA-" + alg.replace(/[a-z]+/ig, '') };
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var msg = textEncoder.encode(opts.protected64 + '.' + opts.payload64);
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console.log('msg:', msg);
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return window.crypto.subtle.sign(
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{ name: wcOpts.name, hash: signHash }
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, wcPrivKey
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, msg
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).then(function (signature) {
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//console.log('sig1:', signature);
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//console.log('sig2:', new Uint8Array(signature));
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//console.log('sig3:', Array.prototype.slice.call(new Uint8Array(signature)));
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// convert buffer to urlsafe base64
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var sig64 = btoa(Array.prototype.map.call(new Uint8Array(signature), function (ch) {
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return String.fromCharCode(ch);
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}).join('')).replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/g, '');
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console.log('[1] URL-safe Base64 Signature:');
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console.log(sig64);
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var signedMsg = {
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protected: opts.protected64
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, payload: opts.payload64
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, signature: sig64
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};
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console.log('Signed Base64 Msg:');
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console.log(JSON.stringify(signedMsg, null, 2));
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return signedMsg;
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});
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};
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// email = john.doe@gmail.com
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// jwk = { ... }
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// agree = true
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BACME.accounts.sign = function (opts) {
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return BACME._importKey(opts.jwk).then(function (abstractKey) {
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var payloadJson =
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{ termsOfServiceAgreed: opts.agree
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, onlyReturnExisting: false
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, contact: opts.contacts || [ 'mailto:' + opts.email ]
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};
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console.log('payload:');
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console.log(payloadJson);
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var payload64 = BACME._jsto64(
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payloadJson
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);
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var protectedJson =
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{ nonce: opts.nonce
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, url: accountUrl
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, alg: abstractKey.meta.alg
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, jwk: null
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};
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if (/EC/i.test(opts.jwk.kty)) {
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protectedJson.jwk = {
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crv: opts.jwk.crv
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, kty: opts.jwk.kty
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, x: opts.jwk.x
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, y: opts.jwk.y
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};
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} else if (/RS/i.test(opts.jwk.kty)) {
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protectedJson.jwk = {
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e: opts.jwk.e
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, kty: opts.jwk.kty
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, n: opts.jwk.n
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};
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} else {
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return Promise.reject(new Error("[acme.accounts.sign] unsupported key type '" + opts.jwk.kty + "'"));
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}
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console.log('protected:');
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console.log(protectedJson);
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var protected64 = BACME._jsto64(
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protectedJson
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);
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// Note: this function hashes before signing so send data, not the hash
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return BACME._sign({
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abstractKey: abstractKey
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, payload64: payload64
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, protected64: protected64
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});
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});
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};
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var accountId;
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BACME.accounts.set = function (opts) {
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nonce = null;
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return window.fetch(accountUrl, {
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mode: 'cors'
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, method: 'POST'
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, headers: { 'Content-Type': 'application/jose+json' }
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, body: JSON.stringify(opts.signedAccount)
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}).then(function (resp) {
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BACME._logHeaders(resp);
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nonce = resp.headers.get('replay-nonce');
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accountId = resp.headers.get('location');
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console.log('Next nonce:', nonce);
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console.log('Location/kid:', accountId);
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if (!resp.headers.get('content-type')) {
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console.log('Body: <none>');
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return { kid: accountId };
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}
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return resp.json().then(function (result) {
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if (/^Error/i.test(result.detail)) {
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return Promise.reject(new Error(result.detail));
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}
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result.kid = accountId;
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BACME._logBody(result);
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return result;
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});
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});
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};
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var orderUrl;
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BACME.orders = {};
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// identifiers = [ { type: 'dns', value: 'example.com' }, { type: 'dns', value: '*.example.com' } ]
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// signedAccount
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BACME.orders.sign = function (opts) {
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var payload64 = BACME._jsto64({ identifiers: opts.identifiers });
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return BACME._importKey(opts.jwk).then(function (abstractKey) {
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var protected64 = BACME._jsto64(
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{ nonce: nonce, alg: abstractKey.meta.alg/*'ES256'*/, url: orderUrl, kid: opts.kid }
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);
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console.log('abstractKey:');
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console.log(abstractKey);
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return BACME._sign({
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abstractKey: abstractKey
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, payload64: payload64
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, protected64: protected64
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}).then(function (sig) {
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if (!sig) {
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throw new Error('sig is undefined... nonsense!');
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}
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console.log('newsig', sig);
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return sig;
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});
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});
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};
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var currentOrderUrl;
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var authorizationUrls;
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var finalizeUrl;
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BACME.orders.create = function (opts) {
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nonce = null;
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return window.fetch(orderUrl, {
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mode: 'cors'
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, method: 'POST'
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, headers: { 'Content-Type': 'application/jose+json' }
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, body: JSON.stringify(opts.signedOrder)
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}).then(function (resp) {
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BACME._logHeaders(resp);
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currentOrderUrl = resp.headers.get('location');
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nonce = resp.headers.get('replay-nonce');
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console.log('Next nonce:', nonce);
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return resp.json().then(function (result) {
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if (/^Error/i.test(result.detail)) {
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return Promise.reject(new Error(result.detail));
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}
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authorizationUrls = result.authorizations;
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finalizeUrl = result.finalize;
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BACME._logBody(result);
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result.url = currentOrderUrl;
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return result;
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});
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});
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};
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BACME.challenges = {};
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BACME.challenges.all = function () {
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var challenges = [];
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function next() {
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if (!authorizationUrls.length) {
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return challenges;
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}
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return BACME.challenges.view().then(function (challenge) {
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challenges.push(challenge);
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return next();
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});
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}
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return next();
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};
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BACME.challenges.view = function () {
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var authzUrl = authorizationUrls.pop();
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var token;
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var challengeDomain;
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var challengeUrl;
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return window.fetch(authzUrl, {
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mode: 'cors'
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|
|
}).then(function (resp) {
|
||
|
|
BACME._logHeaders(resp);
|
||
|
|
|
||
|
|
return resp.json().then(function (result) {
|
||
|
|
// Note: select the challenge you wish to use
|
||
|
|
var challenge = result.challenges.slice(0).pop();
|
||
|
|
token = challenge.token;
|
||
|
|
challengeUrl = challenge.url;
|
||
|
|
challengeDomain = result.identifier.value;
|
||
|
|
|
||
|
|
BACME._logBody(result);
|
||
|
|
|
||
|
|
return {
|
||
|
|
challenges: result.challenges
|
||
|
|
, expires: result.expires
|
||
|
|
, identifier: result.identifier
|
||
|
|
, status: result.status
|
||
|
|
, wildcard: result.wildcard
|
||
|
|
//, token: challenge.token
|
||
|
|
//, url: challenge.url
|
||
|
|
//, domain: result.identifier.value,
|
||
|
|
};
|
||
|
|
});
|
||
|
|
});
|
||
|
|
};
|
||
|
|
|
||
|
|
var thumbprint;
|
||
|
|
var keyAuth;
|
||
|
|
var httpPath;
|
||
|
|
var dnsAuth;
|
||
|
|
var dnsRecord;
|
||
|
|
|
||
|
|
BACME.thumbprint = function (opts) {
|
||
|
|
// https://stackoverflow.com/questions/42588786/how-to-fingerprint-a-jwk
|
||
|
|
|
||
|
|
var accountJwk = opts.jwk;
|
||
|
|
var keys;
|
||
|
|
|
||
|
|
if (/^EC/i.test(opts.jwk.kty)) {
|
||
|
|
keys = [ 'crv', 'kty', 'x', 'y' ];
|
||
|
|
} else if (/^RS/i.test(opts.jwk.kty)) {
|
||
|
|
keys = [ 'e', 'kty', 'n' ];
|
||
|
|
}
|
||
|
|
|
||
|
|
var accountPublicStr = '{' + keys.map(function (key) {
|
||
|
|
return '"' + key + '":"' + accountJwk[key] + '"';
|
||
|
|
}).join(',') + '}';
|
||
|
|
|
||
|
|
return window.crypto.subtle.digest(
|
||
|
|
{ name: "SHA-256" } // SHA-256 is spec'd, non-optional
|
||
|
|
, textEncoder.encode(accountPublicStr)
|
||
|
|
).then(function (hash) {
|
||
|
|
thumbprint = btoa(Array.prototype.map.call(new Uint8Array(hash), function (ch) {
|
||
|
|
return String.fromCharCode(ch);
|
||
|
|
}).join('')).replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/g, '');
|
||
|
|
|
||
|
|
console.log('Thumbprint:');
|
||
|
|
console.log(opts);
|
||
|
|
console.log(accountPublicStr);
|
||
|
|
console.log(thumbprint);
|
||
|
|
|
||
|
|
return thumbprint;
|
||
|
|
});
|
||
|
|
};
|
||
|
|
|
||
|
|
// { token, thumbprint, challengeDomain }
|
||
|
|
BACME.challenges['http-01'] = function (opts) {
|
||
|
|
// The contents of the key authorization file
|
||
|
|
keyAuth = opts.token + '.' + opts.thumbprint;
|
||
|
|
|
||
|
|
// Where the key authorization file goes
|
||
|
|
httpPath = 'http://' + opts.challengeDomain + '/.well-known/acme-challenge/' + opts.token;
|
||
|
|
|
||
|
|
console.log("echo '" + keyAuth + "' > '" + httpPath + "'");
|
||
|
|
|
||
|
|
return {
|
||
|
|
path: httpPath
|
||
|
|
, value: keyAuth
|
||
|
|
};
|
||
|
|
};
|
||
|
|
|
||
|
|
// { keyAuth }
|
||
|
|
BACME.challenges['dns-01'] = function (opts) {
|
||
|
|
console.log('opts.keyAuth for DNS:');
|
||
|
|
console.log(opts.keyAuth);
|
||
|
|
return window.crypto.subtle.digest(
|
||
|
|
{ name: "SHA-256", }
|
||
|
|
, textEncoder.encode(opts.keyAuth)
|
||
|
|
).then(function (hash) {
|
||
|
|
dnsAuth = btoa(Array.prototype.map.call(new Uint8Array(hash), function (ch) {
|
||
|
|
return String.fromCharCode(ch);
|
||
|
|
}).join('')).replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/g, '');
|
||
|
|
|
||
|
|
dnsRecord = '_acme-challenge.' + opts.challengeDomain;
|
||
|
|
|
||
|
|
console.log('DNS TXT Auth:');
|
||
|
|
// The name of the record
|
||
|
|
console.log(dnsRecord);
|
||
|
|
// The TXT record value
|
||
|
|
console.log(dnsAuth);
|
||
|
|
|
||
|
|
return {
|
||
|
|
type: 'TXT'
|
||
|
|
, host: dnsRecord
|
||
|
|
, answer: dnsAuth
|
||
|
|
};
|
||
|
|
});
|
||
|
|
};
|
||
|
|
|
||
|
|
var challengePollUrl;
|
||
|
|
|
||
|
|
// { jwk, challengeUrl, accountId (kid) }
|
||
|
|
BACME.challenges.accept = function (opts) {
|
||
|
|
var payload64 = BACME._jsto64({});
|
||
|
|
|
||
|
|
return BACME._importKey(opts.jwk).then(function (abstractKey) {
|
||
|
|
var protected64 = BACME._jsto64(
|
||
|
|
{ nonce: nonce, alg: abstractKey.meta.alg/*'ES256'*/, url: opts.challengeUrl, kid: opts.accountId }
|
||
|
|
);
|
||
|
|
return BACME._sign({
|
||
|
|
abstractKey: abstractKey
|
||
|
|
, payload64: payload64
|
||
|
|
, protected64: protected64
|
||
|
|
});
|
||
|
|
}).then(function (signedAccept) {
|
||
|
|
|
||
|
|
nonce = null;
|
||
|
|
return window.fetch(
|
||
|
|
opts.challengeUrl
|
||
|
|
, { mode: 'cors'
|
||
|
|
, method: 'POST'
|
||
|
|
, headers: { 'Content-Type': 'application/jose+json' }
|
||
|
|
, body: JSON.stringify(signedAccept)
|
||
|
|
}
|
||
|
|
).then(function (resp) {
|
||
|
|
BACME._logHeaders(resp);
|
||
|
|
nonce = resp.headers.get('replay-nonce');
|
||
|
|
console.log("ACCEPT NONCE:", nonce);
|
||
|
|
|
||
|
|
return resp.json().then(function (reply) {
|
||
|
|
challengePollUrl = reply.url;
|
||
|
|
|
||
|
|
console.log('Challenge ACK:');
|
||
|
|
console.log(JSON.stringify(reply));
|
||
|
|
return reply;
|
||
|
|
});
|
||
|
|
});
|
||
|
|
});
|
||
|
|
};
|
||
|
|
|
||
|
|
BACME.challenges.check = function (opts) {
|
||
|
|
return window.fetch(opts.challengePollUrl, { mode: 'cors' }).then(function (resp) {
|
||
|
|
BACME._logHeaders(resp);
|
||
|
|
|
||
|
|
return resp.json().then(function (reply) {
|
||
|
|
if (/error/.test(reply.type)) {
|
||
|
|
return Promise.reject(new Error(reply.detail || reply.type));
|
||
|
|
}
|
||
|
|
challengePollUrl = reply.url;
|
||
|
|
|
||
|
|
BACME._logBody(reply);
|
||
|
|
|
||
|
|
return reply;
|
||
|
|
});
|
||
|
|
});
|
||
|
|
};
|
||
|
|
|
||
|
|
var domainKeypair;
|
||
|
|
var domainJwk;
|
||
|
|
|
||
|
|
BACME.generateKeypair = function (opts) {
|
||
|
|
var wcOpts = {};
|
||
|
|
|
||
|
|
// ECDSA has only the P curves and an associated bitlength
|
||
|
|
if (/^EC/i.test(opts.type)) {
|
||
|
|
wcOpts.name = 'ECDSA';
|
||
|
|
if (/256/.test(opts.bitlength)) {
|
||
|
|
wcOpts.namedCurve = 'P-256';
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// RSA-PSS is another option, but I don't think it's used for Let's Encrypt
|
||
|
|
// I think the hash is only necessary for signing, not generation or import
|
||
|
|
if (/^RS/i.test(opts.type)) {
|
||
|
|
wcOpts.name = 'RSASSA-PKCS1-v1_5';
|
||
|
|
wcOpts.modulusLength = opts.bitlength;
|
||
|
|
if (opts.bitlength < 2048) {
|
||
|
|
wcOpts.modulusLength = opts.bitlength * 8;
|
||
|
|
}
|
||
|
|
wcOpts.publicExponent = new Uint8Array([0x01, 0x00, 0x01]);
|
||
|
|
wcOpts.hash = { name: "SHA-256" };
|
||
|
|
}
|
||
|
|
var extractable = true;
|
||
|
|
return window.crypto.subtle.generateKey(
|
||
|
|
wcOpts
|
||
|
|
, extractable
|
||
|
|
, [ 'sign', 'verify' ]
|
||
|
|
);
|
||
|
|
};
|
||
|
|
BACME.domains = {};
|
||
|
|
// TODO factor out from BACME.accounts.generateKeypair even more
|
||
|
|
BACME.domains.generateKeypair = function (opts) {
|
||
|
|
return BACME.generateKeypair(opts).then(function (result) {
|
||
|
|
domainKeypair = result;
|
||
|
|
|
||
|
|
return window.crypto.subtle.exportKey(
|
||
|
|
"jwk"
|
||
|
|
, result.privateKey
|
||
|
|
).then(function (privJwk) {
|
||
|
|
|
||
|
|
domainJwk = privJwk;
|
||
|
|
console.log('private jwk:');
|
||
|
|
console.log(JSON.stringify(privJwk, null, 2));
|
||
|
|
|
||
|
|
return privJwk;
|
||
|
|
});
|
||
|
|
});
|
||
|
|
};
|
||
|
|
|
||
|
|
// { serverJwk, domains }
|
||
|
|
BACME.orders.generateCsr = function (opts) {
|
||
|
|
return BACME._importKey(opts.serverJwk).then(function (abstractKey) {
|
||
|
|
return Promise.resolve(CSR.generate({ keypair: abstractKey.wcKeypair, domains: opts.domains }));
|
||
|
|
});
|
||
|
|
};
|
||
|
|
|
||
|
|
var certificateUrl;
|
||
|
|
|
||
|
|
// { csr, jwk, finalizeUrl, accountId }
|
||
|
|
BACME.orders.finalize = function (opts) {
|
||
|
|
var payload64 = BACME._jsto64(
|
||
|
|
{ csr: opts.csr }
|
||
|
|
);
|
||
|
|
|
||
|
|
return BACME._importKey(opts.jwk).then(function (abstractKey) {
|
||
|
|
var protected64 = BACME._jsto64(
|
||
|
|
{ nonce: nonce, alg: abstractKey.meta.alg/*'ES256'*/, url: opts.finalizeUrl, kid: opts.accountId }
|
||
|
|
);
|
||
|
|
return BACME._sign({
|
||
|
|
abstractKey: abstractKey
|
||
|
|
, payload64: payload64
|
||
|
|
, protected64: protected64
|
||
|
|
});
|
||
|
|
}).then(function (signedFinal) {
|
||
|
|
|
||
|
|
nonce = null;
|
||
|
|
return window.fetch(
|
||
|
|
opts.finalizeUrl
|
||
|
|
, { mode: 'cors'
|
||
|
|
, method: 'POST'
|
||
|
|
, headers: { 'Content-Type': 'application/jose+json' }
|
||
|
|
, body: JSON.stringify(signedFinal)
|
||
|
|
}
|
||
|
|
).then(function (resp) {
|
||
|
|
BACME._logHeaders(resp);
|
||
|
|
nonce = resp.headers.get('replay-nonce');
|
||
|
|
|
||
|
|
return resp.json().then(function (reply) {
|
||
|
|
if (/error/.test(reply.type)) {
|
||
|
|
return Promise.reject(new Error(reply.detail || reply.type));
|
||
|
|
}
|
||
|
|
certificateUrl = reply.certificate;
|
||
|
|
BACME._logBody(reply);
|
||
|
|
|
||
|
|
return reply;
|
||
|
|
});
|
||
|
|
});
|
||
|
|
});
|
||
|
|
};
|
||
|
|
|
||
|
|
BACME.orders.receive = function (opts) {
|
||
|
|
return window.fetch(
|
||
|
|
opts.certificateUrl
|
||
|
|
, { mode: 'cors'
|
||
|
|
, method: 'GET'
|
||
|
|
}
|
||
|
|
).then(function (resp) {
|
||
|
|
BACME._logHeaders(resp);
|
||
|
|
nonce = resp.headers.get('replay-nonce');
|
||
|
|
|
||
|
|
return resp.text().then(function (reply) {
|
||
|
|
BACME._logBody(reply);
|
||
|
|
|
||
|
|
return reply;
|
||
|
|
});
|
||
|
|
});
|
||
|
|
};
|
||
|
|
|
||
|
|
BACME.orders.check = function (opts) {
|
||
|
|
return window.fetch(
|
||
|
|
opts.orderUrl
|
||
|
|
, { mode: 'cors'
|
||
|
|
, method: 'GET'
|
||
|
|
}
|
||
|
|
).then(function (resp) {
|
||
|
|
BACME._logHeaders(resp);
|
||
|
|
|
||
|
|
return resp.json().then(function (reply) {
|
||
|
|
if (/error/.test(reply.type)) {
|
||
|
|
return Promise.reject(new Error(reply.detail || reply.type));
|
||
|
|
}
|
||
|
|
BACME._logBody(reply);
|
||
|
|
|
||
|
|
return reply;
|
||
|
|
});
|
||
|
|
});
|
||
|
|
};
|
||
|
|
|
||
|
|
}(window));
|