117 lines
4.3 KiB
JavaScript
117 lines
4.3 KiB
JavaScript
'use strict';
|
|
|
|
var crypto = require('crypto');
|
|
var PromiseA = require('bluebird');
|
|
var OpErr = PromiseA.OperationalError;
|
|
var makeB64UrlSafe = require('./common').makeB64UrlSafe;
|
|
|
|
function thumbprint(jwk) {
|
|
// To produce a thumbprint we need to create a JSON string with only the required keys for
|
|
// the key type, with the keys sorted lexicographically and no white space. We then need
|
|
// run it through a SHA-256 and encode the result in url safe base64.
|
|
// https://stackoverflow.com/questions/42588786/how-to-fingerprint-a-jwk
|
|
var keys;
|
|
if (jwk.kty === 'EC') {
|
|
keys = ['crv', 'x', 'y'];
|
|
} else if (jwk.kty === 'RSA') {
|
|
keys = ['e', 'n'];
|
|
} else {
|
|
return PromiseA.reject(new Error('invalid JWK key type ' + jwk.kty));
|
|
}
|
|
keys.push('kty');
|
|
keys.sort();
|
|
|
|
var missing = keys.filter(function (name) { return !jwk.hasOwnProperty(name); });
|
|
if (missing.length > 0) {
|
|
return PromiseA.reject(new Error('JWK of type '+jwk.kty+' missing fields ' + missing));
|
|
}
|
|
|
|
// I'm not 100% sure this behavior is guaranteed by a real standard, but when we use an array
|
|
// as the replacer argument the keys are always in the order they appeared in the array.
|
|
var jwkStr = JSON.stringify(jwk, keys);
|
|
var hash = crypto.createHash('sha256').update(jwkStr).digest('base64');
|
|
return PromiseA.resolve(makeB64UrlSafe(hash));
|
|
}
|
|
|
|
function create(app) {
|
|
var restful = {};
|
|
restful.get = function (req, res) {
|
|
// The sub in params is the 3rd party PPID, but the keys are stored by the issuer PPID, so
|
|
// we need to look up the issuer PPID using the 3rd party PPID.
|
|
var promise = req.getSiteStore().then(function (store) {
|
|
if (req.params.kid === req.experienceId) {
|
|
return store.IssuerOauth3OrgPrivateKeys.get(req.experienceId);
|
|
}
|
|
|
|
// First we check to see if the key is being requested by the `sub` that we as the issuer use
|
|
// to identify the user, and if not then we need to look up the specified `sub` to see if
|
|
// we can determine which (if any) account it's associated with.
|
|
return store.IssuerOauth3OrgJwks.get(req.params.sub+'/'+req.params.kid).then(function (jwk) {
|
|
if (jwk) {
|
|
return jwk;
|
|
}
|
|
|
|
return store.IssuerOauth3OrgGrants.find({ azpSub: req.params.sub }).then(function (results) {
|
|
if (!results.length) {
|
|
throw new OpErr("unknown PPID '"+req.params.sub+"'");
|
|
}
|
|
if (results.length > 1) {
|
|
// This should not ever happen since there is a check for PPID collisions when saving
|
|
// grants, but it's probably better to have this check anyway just incase something
|
|
// happens that isn't currently accounted for.
|
|
throw new OpErr('PPID collision - unable to safely retrieve keys');
|
|
}
|
|
|
|
return store.IssuerOauth3OrgJwks.get(results[0].sub+'/'+req.params.kid);
|
|
});
|
|
});
|
|
}).then(function (jwk) {
|
|
if (!jwk) {
|
|
throw new OpErr("no keys stored with kid '"+req.params.kid+"' for PPID "+req.params.sub);
|
|
}
|
|
|
|
// We need to sanitize the key to make sure we don't deliver any private keys fields if
|
|
// we were given a key we could use to sign tokens on behalf of the user. We also don't
|
|
// want to deliver the sub or any other PPIDs.
|
|
var whitelist = [ 'kty', 'alg', 'kid', 'use' ];
|
|
if (jwk.kty === 'EC') {
|
|
whitelist = whitelist.concat([ 'crv', 'x', 'y' ]);
|
|
} else if (jwk.kty === 'RSA') {
|
|
whitelist = whitelist.concat([ 'e', 'n' ]);
|
|
}
|
|
|
|
var result = {};
|
|
whitelist.forEach(function (key) {
|
|
result[key] = jwk[key];
|
|
});
|
|
return result;
|
|
});
|
|
|
|
app.handlePromise(req, res, promise, "[issuer@oauth3.org] retrieve JWK");
|
|
};
|
|
restful.saveNew = function (req, res) {
|
|
var jwk = req.body;
|
|
var promise = thumbprint(jwk).then(function (kid) {
|
|
if (jwk.kid && jwk.kid !== kid) {
|
|
throw new OpErr('provided kid "'+jwk.kid+'" does not match calculated "'+kid+'"');
|
|
}
|
|
jwk.kid = kid;
|
|
jwk.sub = req.params.sub;
|
|
|
|
return req.Store.upsert(jwk.sub+'/'+jwk.kid, jwk);
|
|
}).then(function () {
|
|
return { success: true };
|
|
});
|
|
|
|
app.handlePromise(req, res, promise, "[issuer@oauth3.org] save JWK");
|
|
};
|
|
|
|
return {
|
|
thumbprint: thumbprint,
|
|
restful: restful,
|
|
};
|
|
}
|
|
|
|
module.exports.thumbprint = thumbprint;
|
|
module.exports.create = create;
|