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bluecrypt-keypairs.js
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Can register new ECDSA or RSA account, huzzah!

This commit is contained in:
AJ ONeal 2019-04-28 02:11:33 -06:00
parent 76621560cb
commit 488067ec20
4 changed files with 518 additions and 371 deletions
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18
app.js
View File

@ -5,6 +5,7 @@
var Rasha = window.Rasha;
var Eckles = window.Eckles;
var x509 = window.x509;
var ACME = window.ACME;
function $(sel) {
return document.querySelector(sel);
@ -106,7 +107,22 @@
ev.preventDefault();
ev.stopPropagation();
$('.js-loading').hidden = false;
//ACME.accounts.create
var acme = ACME.create({
Keypairs: Keypairs
});
acme.init('https://acme-staging-v02.api.letsencrypt.org/directory').then(function (result) {
console.log('acme result', result);
return acme.accounts.create({
email: $('.js-email').innerText
, agreeToTerms: function (tos) {
console.log("TODO checkbox for agree to terms");
return tos;
}
, accountKeypair: {
privateKeyJwk: JSON.parse($('.js-jwk').innerText).private
}
});
});
});
$('.js-generate').hidden = false;

356
lib/acme.js
View File

@ -30,7 +30,7 @@ ACME.challengePrefixes = {
ACME.challengeTests = {
'http-01': function (me, auth) {
var url = 'http://' + auth.hostname + ACME.challengePrefixes['http-01'] + '/' + auth.token;
return me._request({ method: 'GET', url: url }).then(function (resp) {
return me.request({ method: 'GET', url: url }).then(function (resp) {
var err;
// TODO limit the number of bytes that are allowed to be downloaded
@ -76,16 +76,28 @@ ACME.challengeTests = {
ACME._directory = function (me) {
// GET-as-GET ok
return me._request({ method: 'GET', url: me.directoryUrl, json: true });
return me.request({ method: 'GET', url: me.directoryUrl, json: true });
};
ACME._getNonce = function (me) {
// GET-as-GET, HEAD-as-HEAD ok
if (me._nonce) { return new Promise(function (resolve) { resolve(me._nonce); return; }); }
return me._request({ method: 'HEAD', url: me._directoryUrls.newNonce }).then(function (resp) {
me._nonce = resp.toJSON().headers['replay-nonce'];
return me._nonce;
var nonce;
while (true) {
nonce = me._nonces.shift();
if (!nonce) { break; }
if (Date.now() - nonce.createdAt > (15 * 60 * 1000)) {
nonce = null;
} else {
break;
}
}
if (nonce) { return Promise.resolve(nonce); }
return me.request({ method: 'HEAD', url: me._directoryUrls.newNonce }).then(function (resp) {
return resp.headers['replay-nonce'];
});
};
ACME._setNonce = function (me, nonce) {
me._nonces.unshift({ nonce: nonce, createdAt: Date.now() });
};
// ACME RFC Section 7.3 Account Creation
/*
{
@ -109,7 +121,6 @@ ACME._getNonce = function (me) {
ACME._registerAccount = function (me, options) {
if (me.debug) { console.debug('[acme-v2] accounts.create'); }
return ACME._getNonce(me).then(function () {
return new Promise(function (resolve, reject) {
function agree(tosUrl) {
@ -124,11 +135,16 @@ ACME._registerAccount = function (me, options) {
var jwk = options.accountKeypair.privateKeyJwk;
var p;
if (jwk) {
p = Promise.resolve({ private: jwk, public: Keypairs.neuter(jwk) });
// nix the browser jwk extras
jwk.key_ops = undefined;
jwk.ext = undefined;
p = Promise.resolve({ private: jwk, public: Keypairs.neuter({ jwk: jwk }) });
} else {
p = Keypairs.import({ pem: options.accountKeypair.privateKeyPem });
}
return p.then(function (pair) {
options.accountKeypair.privateKeyJwk = pair.private;
options.accountKeypair.publicKeyJwk = pair.public;
if (pair.public.kid) {
pair = JSON.parse(JSON.stringify(pair));
delete pair.public.kid;
@ -147,53 +163,44 @@ ACME._registerAccount = function (me, options) {
, onlyReturnExisting: false
, contact: contact
};
var pExt;
if (options.externalAccount) {
body.externalAccountBinding = me.RSA.signJws(
pExt = me.Keypairs.signJws({
// TODO is HMAC the standard, or is this arbitrary?
options.externalAccount.secret
, undefined
, { alg: options.externalAccount.alg || "HS256"
secret: options.externalAccount.secret
, protected: {
alg: options.externalAccount.alg || "HS256"
, kid: options.externalAccount.id
, url: me._directoryUrls.newAccount
}
, Buffer.from(JSON.stringify(pair.public))
);
, payload: Enc.strToBuf(JSON.stringify(pair.public))
}).then(function (jws) {
body.externalAccountBinding = jws;
return body;
});
} else {
pExt = Promise.resolve(body);
}
return pExt.then(function (body) {
var payload = JSON.stringify(body);
var jws = Keypairs.signJws(
options.accountKeypair
, undefined
, { nonce: me._nonce
, alg: (me._alg || 'RS256')
return ACME._jwsRequest(me, {
options: options
, url: me._directoryUrls.newAccount
, jwk: pair.public
}
, Buffer.from(payload)
);
delete jws.header;
if (me.debug) { console.debug('[acme-v2] accounts.create JSON body:'); }
if (me.debug) { console.debug(jws); }
me._nonce = null;
return me._request({
method: 'POST'
, url: me._directoryUrls.newAccount
, headers: { 'Content-Type': 'application/jose+json' }
, json: jws
, protected: { kid: false, jwk: pair.public }
, payload: Enc.binToBuf(payload)
}).then(function (resp) {
var account = resp.body;
if (2 !== Math.floor(resp.statusCode / 100)) {
throw new Error('account error: ' + JSON.stringify(body));
throw new Error('account error: ' + JSON.stringify(resp.body));
}
me._nonce = resp.toJSON().headers['replay-nonce'];
var location = resp.toJSON().headers.location;
var location = resp.headers.location;
// the account id url
me._kid = location;
options._kid = location;
if (me.debug) { console.debug('[DEBUG] new account location:'); }
if (me.debug) { console.debug(location); }
if (me.debug) { console.debug(resp.toJSON()); }
if (me.debug) { console.debug(resp); }
/*
{
@ -205,16 +212,17 @@ ACME._registerAccount = function (me, options) {
if (!account) { account = { _emptyResponse: true, key: {} }; }
// https://git.coolaj86.com/coolaj86/acme-v2.js/issues/8
if (!account.key) { account.key = {}; }
account.key.kid = me._kid;
account.key.kid = options._kid;
return account;
}).then(resolve, reject);
});
});
}
if (me.debug) { console.debug('[acme-v2] agreeToTerms'); }
if (1 === options.agreeToTerms.length) {
// newer promise API
return options.agreeToTerms(me._tos).then(agree, reject);
return Promise.resolve(options.agreeToTerms(me._tos)).then(agree, reject);
}
else if (2 === options.agreeToTerms.length) {
// backwards compat cb API
@ -228,7 +236,6 @@ ACME._registerAccount = function (me, options) {
+ ' Should be fn(tos) { return Promise<tos>; }'));
}
});
});
};
/*
POST /acme/new-order HTTP/1.1
@ -250,10 +257,16 @@ ACME._registerAccount = function (me, options) {
"signature": "H6ZXtGjTZyUnPeKn...wEA4TklBdh3e454g"
}
*/
ACME._getChallenges = function (me, options, auth) {
ACME._getChallenges = function (me, options, authUrl) {
if (me.debug) { console.debug('\n[DEBUG] getChallenges\n'); }
// TODO POST-as-GET
return me._request({ method: 'GET', url: auth, json: true }).then(function (resp) {
return ACME._jwsRequest(me, {
options: options
, protected: {}
, payload: ''
, url: authUrl
}).then(function (resp) {
return resp.body;
});
};
@ -389,7 +402,8 @@ ACME._challengeToAuth = function (me, options, request, challenge, dryrun) {
auth.hostname = auth.identifier.value;
// because I'm not 100% clear if the wildcard identifier does or doesn't have the leading *. in all cases
auth.altname = ACME._untame(auth.identifier.value, auth.wildcard);
auth.thumbprint = me.RSA.thumbprint(options.accountKeypair);
return me.Keypairs.thumbprint({ jwk: options.accountKeypair.publicKeyJwk }).then(function (thumb) {
auth.thumbprint = thumb;
// keyAuthorization = token || '.' || base64url(JWK_Thumbprint(accountKey))
auth.keyAuthorization = challenge.token + '.' + auth.thumbprint;
// conflicts with ACME challenge id url is already in use, so we call this challengeUrl instead
@ -400,6 +414,7 @@ ACME._challengeToAuth = function (me, options, request, challenge, dryrun) {
auth.dnsAuthorization = hash;
return auth;
});
});
};
ACME._untame = function (name, wild) {
@ -436,25 +451,13 @@ ACME._postChallenge = function (me, options, auth) {
}
*/
function deactivate() {
var jws = me.RSA.signJws(
options.accountKeypair
, undefined
, { nonce: me._nonce, alg: (me._alg || 'RS256'), url: auth.url, kid: me._kid }
, Buffer.from(JSON.stringify({ "status": "deactivated" }))
);
me._nonce = null;
return me._request({
method: 'POST'
, url: auth.url
, headers: { 'Content-Type': 'application/jose+json' }
, json: jws
}).then(function (resp) {
if (me.debug) { console.debug('[acme-v2.js] deactivate:'); }
if (me.debug) { console.debug(resp.headers); }
if (me.debug) { console.debug(resp.body); }
if (me.debug) { console.debug(); }
me._nonce = resp.toJSON().headers['replay-nonce'];
return ACME._jwsRequest({
options: options
, url: auth.url
, protected: { kid: options._kid }
, payload: Enc.strToBuf(JSON.stringify({ "status": "deactivated" }))
}).then(function (resp) {
if (me.debug) { console.debug('deactivate challenge: resp.body:'); }
if (me.debug) { console.debug(resp.body); }
return ACME._wait(DEAUTH_INTERVAL);
@ -472,7 +475,7 @@ ACME._postChallenge = function (me, options, auth) {
if (me.debug) { console.debug('\n[DEBUG] statusChallenge\n'); }
// TODO POST-as-GET
return me._request({ method: 'GET', url: auth.url, json: true }).then(function (resp) {
return me.request({ method: 'GET', url: auth.url, json: true }).then(function (resp) {
if ('processing' === resp.body.status) {
if (me.debug) { console.debug('poll: again'); }
return ACME._wait(RETRY_INTERVAL).then(pollStatus);
@ -523,25 +526,13 @@ ACME._postChallenge = function (me, options, auth) {
}
function respondToChallenge() {
var jws = me.RSA.signJws(
options.accountKeypair
, undefined
, { nonce: me._nonce, alg: (me._alg || 'RS256'), url: auth.url, kid: me._kid }
, Buffer.from(JSON.stringify({ }))
);
me._nonce = null;
return me._request({
method: 'POST'
if (me.debug) { console.debug('[acme-v2.js] responding to accept challenge:'); }
return ACME._jwsRequest({
options: options
, url: auth.url
, headers: { 'Content-Type': 'application/jose+json' }
, json: jws
, protected: { kid: options._kid }
, payload: Enc.strToBuf(JSON.stringify({}))
}).then(function (resp) {
if (me.debug) { console.debug('[acme-v2.js] challenge accepted!'); }
if (me.debug) { console.debug(resp.headers); }
if (me.debug) { console.debug(resp.body); }
if (me.debug) { console.debug(); }
me._nonce = resp.toJSON().headers['replay-nonce'];
if (me.debug) { console.debug('respond to challenge: resp.body:'); }
if (me.debug) { console.debug(resp.body); }
return ACME._wait(RETRY_INTERVAL).then(pollStatus);
@ -586,36 +577,26 @@ ACME._setChallenge = function (me, options, auth) {
};
ACME._finalizeOrder = function (me, options, validatedDomains) {
if (me.debug) { console.debug('finalizeOrder:'); }
var csr = me.RSA.generateCsrWeb64(options.domainKeypair, validatedDomains);
var csr = me.Keypairs.generateCsrWeb64(options.domainKeypair, validatedDomains);
var body = { csr: csr };
var payload = JSON.stringify(body);
function pollCert() {
var jws = me.RSA.signJws(
options.accountKeypair
, undefined
, { nonce: me._nonce, alg: (me._alg || 'RS256'), url: me._finalize, kid: me._kid }
, Buffer.from(payload)
);
if (me.debug) { console.debug('finalize:', me._finalize); }
me._nonce = null;
return me._request({
method: 'POST'
, url: me._finalize
, headers: { 'Content-Type': 'application/jose+json' }
, json: jws
if (me.debug) { console.debug('[acme-v2.js] pollCert:'); }
return ACME._jwsRequest({
options: options
, url: options._finalize
, protected: { kid: options._kid }
, payload: Enc.strToBuf(payload)
}).then(function (resp) {
// https://tools.ietf.org/html/draft-ietf-acme-acme-12#section-7.1.3
// Possible values are: "pending" => ("invalid" || "ready") => "processing" => "valid"
me._nonce = resp.toJSON().headers['replay-nonce'];
if (me.debug) { console.debug('order finalized: resp.body:'); }
if (me.debug) { console.debug(resp.body); }
// https://tools.ietf.org/html/draft-ietf-acme-acme-12#section-7.1.3
// Possible values are: "pending" => ("invalid" || "ready") => "processing" => "valid"
if ('valid' === resp.body.status) {
me._expires = resp.body.expires;
me._certificate = resp.body.certificate;
options._expires = resp.body.expires;
options._certificate = resp.body.certificate;
return resp.body; // return order
}
@ -672,6 +653,11 @@ ACME._finalizeOrder = function (me, options, validatedDomains) {
return pollCert();
};
// _kid
// registerAccount
// postChallenge
// finalizeOrder
// getCertificate
ACME._getCertificate = function (me, options) {
if (me.debug) { console.debug('[acme-v2] DEBUG get cert 1'); }
@ -704,9 +690,8 @@ ACME._getCertificate = function (me, options) {
}
// It's just fine if there's no account, we'll go get the key id we need via the public key
if (!me._kid) {
if (options.accountKid || options.account && options.account.kid) {
me._kid = options.accountKid || options.account.kid;
options._kid = options.accountKid || options.account.kid;
} else {
//return Promise.reject(new Error("must include KeyID"));
// This is an idempotent request. It'll return the same account for the same public key.
@ -715,12 +700,10 @@ ACME._getCertificate = function (me, options) {
return ACME._getCertificate(me, options);
});
}
}
// Do a little dry-run / self-test
return ACME._testChallenges(me, options).then(function () {
if (me.debug) { console.debug('[acme-v2] certificates.create'); }
return ACME._getNonce(me).then(function () {
var body = {
// raw wildcard syntax MUST be used here
identifiers: options.domains.sort(function (a, b) {
@ -738,42 +721,33 @@ ACME._getCertificate = function (me, options) {
var payload = JSON.stringify(body);
// determine the signing algorithm to use in protected header // TODO isn't that handled by the signer?
me._kty = (options.accountKeypair.privateKeyJwk && options.accountKeypair.privateKeyJwk.kty || 'RSA');
me._alg = ('EC' === me._kty) ? 'ES256' : 'RS256'; // TODO vary with bitwidth of key (if not handled)
var jws = me.RSA.signJws(
options.accountKeypair
, undefined
, { nonce: me._nonce, alg: me._alg, url: me._directoryUrls.newOrder, kid: me._kid }
, Buffer.from(payload, 'utf8')
);
options._kty = (options.accountKeypair.privateKeyJwk && options.accountKeypair.privateKeyJwk.kty || 'RSA');
options._alg = ('EC' === options._kty) ? 'ES256' : 'RS256'; // TODO vary with bitwidth of key (if not handled)
if (me.debug) { console.debug('\n[DEBUG] newOrder\n'); }
me._nonce = null;
return me._request({
method: 'POST'
return ACME._jwsRequest({
options: options
, url: me._directoryUrls.newOrder
, headers: { 'Content-Type': 'application/jose+json' }
, json: jws
, protected: { kid: options._kid }
, payload: Enc.strToBuf(payload)
}).then(function (resp) {
me._nonce = resp.toJSON().headers['replay-nonce'];
var location = resp.toJSON().headers.location;
var location = resp.headers.location;
var setAuths;
var auths = [];
if (me.debug) { console.debug(location); } // the account id url
if (me.debug) { console.debug(resp.toJSON()); }
me._authorizations = resp.body.authorizations;
me._order = location;
me._finalize = resp.body.finalize;
//if (me.debug) console.debug('[DEBUG] finalize:', me._finalize); return;
if (me.debug) { console.debug('[ordered]', location); } // the account id url
if (me.debug) { console.debug(resp); }
options._authorizations = resp.body.authorizations;
options._order = location;
options._finalize = resp.body.finalize;
//if (me.debug) console.debug('[DEBUG] finalize:', options._finalize); return;
if (!me._authorizations) {
if (!options._authorizations) {
return Promise.reject(new Error(
"[acme-v2.js] authorizations were not fetched for '" + options.domains.join() + "':\n"
+ JSON.stringify(resp.body)
));
}
if (me.debug) { console.debug("[acme-v2] POST newOrder has authorizations"); }
setAuths = me._authorizations.slice(0);
setAuths = options._authorizations.slice(0);
function setNext() {
var authUrl = setAuths.shift();
@ -821,7 +795,7 @@ ACME._getCertificate = function (me, options) {
}).then(function (order) {
if (me.debug) { console.debug('acme-v2: order was finalized'); }
// TODO POST-as-GET
return me._request({ method: 'GET', url: me._certificate, json: true }).then(function (resp) {
return me.request({ method: 'GET', url: options._certificate, json: true }).then(function (resp) {
if (me.debug) { console.debug('acme-v2: csr submitted and cert received:'); }
// https://github.com/certbot/certbot/issues/5721
var certsarr = ACME.splitPemChain(ACME.formatPemChain((resp.body||'')));
@ -840,16 +814,16 @@ ACME._getCertificate = function (me, options) {
});
});
});
});
};
ACME.create = function create(me) {
if (!me) { me = {}; }
// me.debug = true;
me.challengePrefixes = ACME.challengePrefixes;
me.RSA = me.RSA || require('rsa-compat').RSA;
me.Keypairs = me.Keypairs || me.RSA || require('rsa-compat').RSA;
me._nonces = [];
//me.Keypairs = me.Keypairs || require('keypairs');
me.request = me.request || require('@coolaj86/urequest');
//me.request = me.request || require('@root/request');
if (!me.dig) {
me.dig = function (query) {
// TODO use digd.js
@ -860,37 +834,33 @@ ACME.create = function create(me) {
resolve({
answer: records.map(function (rr) {
return {
data: rr
};
return { data: rr };
})
});
});
});
};
}
me.promisify = me.promisify || require('util').promisify /*node v8+*/ || require('bluebird').promisify /*node v6*/;
if ('function' !== typeof me._request) {
// MUST have a User-Agent string (see node.js version)
me._request = function (opts) {
return window.fetch(opts.url, opts).then(function (resp) {
return resp.json().then(function (json) {
var headers = {};
Array.from(resp.headers.entries()).forEach(function (h) { headers[h[0]] = h[1]; });
return { headers: headers , body: json };
});
});
};
if ('function' !== typeof me.request) {
me.request = ACME._defaultRequest;
}
me.init = function (_directoryUrl) {
me.directoryUrl = me.directoryUrl || _directoryUrl;
me.init = function (opts) {
function fin(dir) {
me._directoryUrls = dir;
me._tos = dir.meta.termsOfService;
return dir;
}
if (opts && opts.meta && opts.termsOfService) {
return Promise.resolve(fin(opts));
}
if (!me.directoryUrl) { me.directoryUrl = opts; }
if ('string' !== typeof me.directoryUrl) {
throw new Error("you must supply either the ACME directory url as a string or an object of the ACME urls");
}
return ACME._directory(me).then(function (resp) {
me._directoryUrls = resp.body;
me._tos = me._directoryUrls.meta.termsOfService;
return me._directoryUrls;
return fin(resp.body);
});
};
me.accounts = {
@ -906,6 +876,84 @@ ACME.create = function create(me) {
return me;
};
// Handle nonce, signing, and request altogether
ACME._jwsRequest = function (me, bigopts) {
return ACME._getNonce(me).then(function (nonce) {
bigopts.protected.nonce = nonce;
bigopts.protected.url = bigopts.url;
// protected.alg: added by Keypairs.signJws
return me.Keypairs.signJws(
{ jwk: bigopts.options.accountKeypair.privateKeyJwk
, protected: bigopts.protected
, payload: bigopts.payload
}
).then(function (jws) {
if (me.debug) { console.debug('[acme-v2] ' + bigopts.url + ':'); }
if (me.debug) { console.debug(jws); }
return ACME._request(me, { url: bigopts.url, json: jws });
});
});
};
// Handle some ACME-specific defaults
ACME._request = function (me, opts) {
if (!opts.headers) { opts.headers = {}; }
if (opts.json && true !== opts.json) {
opts.headers['Content-Type'] = 'application/jose+json';
opts.body = JSON.stringify(opts.json);
if (!opts.method) { opts.method = 'POST'; }
}
return me.request(opts).then(function (resp) {
resp = resp.toJSON();
if (resp.headers['replay-nonce']) {
ACME._setNonce(me, resp.headers['replay-nonce']);
}
return resp;
});
};
// A very generic, swappable request lib
ACME._defaultRequest = function (opts) {
// Note: normally we'd have to supply a User-Agent string, but not here in a browser
if (!opts.headers) { opts.headers = {}; }
if (opts.json) {
opts.headers.Accept = 'application/json';
if (true !== opts.json) { opts.body = JSON.stringify(opts.json); }
}
if (!opts.method) {
opts.method = 'GET';
if (opts.body) { opts.method = 'POST'; }
}
opts.cors = true;
return window.fetch(opts.url, opts).then(function (resp) {
var headers = {};
var result = { statusCode: resp.status, headers: headers, toJSON: function () { return this; } };
Array.from(resp.headers.entries()).forEach(function (h) { headers[h[0]] = h[1]; });
if (!headers['content-type']) {
return result;
}
if (/json/.test(headers['content-type'])) {
return resp.json().then(function (json) {
result.body = json;
return result;
});
}
return resp.text().then(function (txt) {
result.body = txt;
return result;
});
});
};
/*
TODO
Per-Order State Params
_kty
_alg
_finalize
_expires
_certificate
_order
_authorizations
*/
ACME._toWebsafeBase64 = function (b64) {
return b64.replace(/\+/g, "-").replace(/\//g, "_").replace(/=/g,"");
};

2
lib/ecdsa.js
View File

@ -46,6 +46,8 @@ EC.generate = function (opts) {
"jwk"
, result.privateKey
).then(function (privJwk) {
privJwk.key_ops = undefined;
privJwk.ext = undefined;
return {
private: privJwk
, public: EC.neuter({ jwk: privJwk })

137
lib/keypairs.js
View File

@ -33,12 +33,20 @@ Keypairs.generate = function (opts) {
});
};
Keypairs.export = function (opts) {
return Eckles.export(opts).catch(function (err) {
return Rasha.export(opts).catch(function () {
return Promise.reject(err);
});
});
};
/**
* Chopping off the private parts is now part of the public API.
* I thought it sounded a little too crude at first, but it really is the best name in every possible way.
*/
Keypairs.neuter = Keypairs._neuter = function (opts) {
Keypairs.neuter = function (opts) {
/** trying to find the best balance of an immutable copy with custom attributes */
var jwk = {};
Object.keys(opts.jwk).forEach(function (k) {
@ -128,11 +136,12 @@ Keypairs.signJws = function (opts) {
if (!opts.jwk) {
throw new Error("opts.jwk must exist and must declare 'typ'");
}
return ('RSA' === opts.jwk.kty) ? "RS256" : "ES256";
if (opts.jwk.alg) { return opts.jwk.alg; }
var typ = ('RSA' === opts.jwk.kty) ? "RS" : "ES";
return typ + Keypairs._getBits(opts);
}
function sign(pem) {
var header = opts.header;
function sign() {
var protect = opts.protected;
var payload = opts.payload;
@ -143,8 +152,9 @@ Keypairs.signJws = function (opts) {
if (false !== protect) {
if (!protect) { protect = {}; }
if (!protect.alg) { protect.alg = alg(); }
// There's a particular request where Let's Encrypt explicitly doesn't use a kid
if (!protect.kid && false !== protect.kid) { protect.kid = thumb; }
// There's a particular request where ACME / Let's Encrypt explicitly doesn't use a kid
if (false === protect.kid) { protect.kid = undefined; }
else if (!protect.kid) { protect.kid = thumb; }
protectedHeader = JSON.stringify(protect);
}
@ -155,7 +165,7 @@ Keypairs.signJws = function (opts) {
// Trying to detect if it's a plain object (not Buffer, ArrayBuffer, Array, Uint8Array, etc)
if (payload && ('string' !== typeof payload)
&& ('undefined' === typeof payload.byteLength)
&& ('undefined' === typeof payload.byteLength)
&& ('undefined' === typeof payload.buffer)
) {
payload = JSON.stringify(payload);
}
@ -165,35 +175,44 @@ Keypairs.signJws = function (opts) {
}
// node specifies RSA-SHAxxx even when it's actually ecdsa (it's all encoded x509 shasums anyway)
var nodeAlg = "SHA" + (((protect||header).alg||'').replace(/^[^\d]+/, '')||'256');
var protected64 = Enc.strToUrlBase64(protectedHeader);
var payload64 = Enc.bufToUrlBase64(payload);
var binsig = require('crypto')
.createSign(nodeAlg)
.update(protect ? (protected64 + "." + payload64) : payload64)
.sign(pem)
;
var msg = protected64 + '.' + payload64;
return Keypairs._sign(opts, msg).then(function (buf) {
/*
* This will come back into play for CSRs, but not for JOSE
if ('EC' === opts.jwk.kty) {
// ECDSA JWT signatures differ from "normal" ECDSA signatures
// https://tools.ietf.org/html/rfc7518#section-3.4
binsig = convertIfEcdsa(binsig);
}
var sig = binsig.toString('base64')
.replace(/\+/g, '-')
.replace(/\//g, '_')
.replace(/=/g, '')
;
return {
header: header
, protected: protected64 || undefined
*/
var signedMsg = {
protected: protected64
, payload: payload64
, signature: sig
, signature: Enc.bufToUrlBase64(buf)
};
console.log('Signed Base64 Msg:');
console.log(JSON.stringify(signedMsg, null, 2));
console.log('msg:', msg);
return signedMsg;
});
}
function convertIfEcdsa(binsig) {
if (opts.jwk) {
return sign();
} else {
return Keypairs.import({ pem: opts.pem }).then(function (pair) {
opts.jwk = pair.private;
return sign();
});
}
});
};
Keypairs._convertIfEcdsa = function (binsig) {
// should have asn1 sequence header of 0x30
if (0x30 !== binsig[0]) { throw new Error("Impossible EC SHA head marker"); }
var index = 2; // first ecdsa "R" header byte
@ -226,13 +245,75 @@ Keypairs.signJws = function (opts) {
if (2*(bits+1) === r.length) { r = r.slice(2); }
if (2*(bits+1) === s.length) { s = s.slice(2); }
return Enc.hexToBuf(r + s);
};
Keypairs._sign = function (opts, payload) {
return Keypairs._import(opts).then(function (privkey) {
if ('string' === typeof payload) {
payload = (new TextEncoder()).encode(payload);
}
return window.crypto.subtle.sign(
{ name: Keypairs._getName(opts)
, hash: { name: 'SHA-' + Keypairs._getBits(opts) }
}
, privkey
, payload
).then(function (signature) {
// convert buffer to urlsafe base64
//return Enc.bufToUrlBase64(new Uint8Array(signature));
return new Uint8Array(signature);
});
});
};
Keypairs._getBits = function (opts) {
if (opts.alg) { return opts.alg.replace(/[a-z\-]/ig, ''); }
// base64 len to byte len
var len = Math.floor((opts.jwk.n||'').length * 0.75);
// TODO this may be a bug
// need to confirm that the padding is no more or less than 1 byte
if (/521/.test(opts.jwk.crv) || len >= 511) {
return '512';
} else if (/384/.test(opts.jwk.crv) || len >= 383) {
return '384';
}
if (opts.pem && opts.jwk) {
return sign(opts.pem);
return '256';
};
Keypairs._getName = function (opts) {
if (/EC/i.test(opts.jwk.kty)) {
return 'ECDSA';
} else {
return Keypairs.export({ jwk: opts.jwk }).then(sign);
return 'RSASSA-PKCS1-v1_5';
}
};
Keypairs._import = function (opts) {
return Promise.resolve().then(function () {
var ops;
// all private keys just happen to have a 'd'
if (opts.jwk.d) {
ops = [ 'sign' ];
} else {
ops = [ 'verify' ];
}
// gotta mark it as extractable, as if it matters
opts.jwk.ext = true;
opts.jwk.key_ops = ops;
console.log('jwk', opts.jwk);
return window.crypto.subtle.importKey(
"jwk"
, opts.jwk
, { name: Keypairs._getName(opts)
, namedCurve: opts.jwk.crv
, hash: { name: 'SHA-' + Keypairs._getBits(opts) } }
, true
, ops
).then(function (privkey) {
delete opts.jwk.ext;
return privkey;
});
});
};