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