openethereum/js/packages/ledger/vendor/ledger3.js

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2017-01-24 11:46:59 +01:00
/********************************************************************************
* Ledger Communication toolkit
* (c) 2016 Ledger
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
********************************************************************************/
/* eslint-disable */
'use strict';
var Ledger3 = function(scrambleKey, timeoutSeconds) {
this.scrambleKey = new Buffer(scrambleKey, 'ascii');
this.timeoutSeconds = timeoutSeconds;
}
Ledger3.wrapApdu = function(apdu, key) {
var result = new Buffer(apdu.length);
for (var i=0; i<apdu.length; i++) {
result[i] = apdu[i] ^ key[i % key.length];
}
return result;
}
// Convert from normal to web-safe, strip trailing "="s
Ledger3.webSafe64 = function(base64) {
return base64.replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/, '');
}
// Convert from web-safe to normal, add trailing "="s
Ledger3.normal64 = function(base64) {
return base64.replace(/\-/g, '+').replace(/_/g, '/') + '=='.substring(0, (3*base64.length)%4);
}
Ledger3.prototype.u2fCallback = function(response, callback) {
if (typeof response['signatureData'] != "undefined") {
var data = new Buffer((Ledger3.normal64(response['signatureData'])), 'base64');
callback(data.toString('hex', 5));
}
else {
callback(undefined, response);
}
}
// callback is function(response, error)
Ledger3.prototype.exchange = function(apduHex, callback) {
var apdu = new Buffer(apduHex, 'hex');
var keyHandle = Ledger3.wrapApdu(apdu, this.scrambleKey);
var challenge = new Buffer("0000000000000000000000000000000000000000000000000000000000000000", 'hex');
var key = {};
key['version'] = 'U2F_V2';
key['keyHandle'] = Ledger3.webSafe64(keyHandle.toString('base64'));
var self = this;
var localCallback = function(result) {
self.u2fCallback(result, callback);
}
u2f.sign(location.origin, Ledger3.webSafe64(challenge.toString('base64')), [key], localCallback, this.timeoutSeconds);
}
module.exports = Ledger3
/* eslint-enable */