owltech
Version:
This a backend for OwlTech Company
94 lines • 4.31 kB
JavaScript
;
/**
* Copyright 2019 Google LLC. All Rights Reserved.
*
* 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.
*/
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
Object.defineProperty(exports, "__esModule", { value: true });
// This file implements crypto functions we need using in-browser
// SubtleCrypto interface `window.crypto.subtle`.
const base64js = require("base64-js");
const isbrowser_1 = require("../../isbrowser");
// Not all browsers support `TextEncoder`. The following `require` will
// provide a fast UTF8-only replacement for those browsers that don't support
// text encoding natively.
if (isbrowser_1.isBrowser() && typeof TextEncoder === 'undefined') {
require('fast-text-encoding');
}
class BrowserCrypto {
constructor() {
if (typeof (window) === 'undefined' || window.crypto === undefined ||
window.crypto.subtle === undefined) {
throw new Error('SubtleCrypto not found. Make sure it\'s an https:// website.');
}
}
sha256DigestBase64(str) {
return __awaiter(this, void 0, void 0, function* () {
// SubtleCrypto digest() method is async, so we must make
// this method async as well.
// To calculate SHA256 digest using SubtleCrypto, we first
// need to convert an input string to an ArrayBuffer:
const inputBuffer = new TextEncoder().encode(str);
// Result is ArrayBuffer as well.
const outputBuffer = yield window.crypto.subtle.digest('SHA-256', inputBuffer);
return base64js.fromByteArray(new Uint8Array(outputBuffer));
});
}
randomBytesBase64(count) {
const array = new Uint8Array(count);
window.crypto.getRandomValues(array);
return base64js.fromByteArray(array);
}
verify(pubkey, data, signature) {
return __awaiter(this, void 0, void 0, function* () {
const algo = {
name: 'RSASSA-PKCS1-v1_5',
hash: { name: 'SHA-256' },
};
const dataArray = new TextEncoder().encode(data);
// base64js requires padding, so let's add some '='
while (signature.length % 4 !== 0) {
signature += '=';
}
const signatureArray = base64js.toByteArray(signature);
const cryptoKey = yield window.crypto.subtle.importKey('jwk', pubkey, algo, true, ['verify']);
// SubtleCrypto's verify method is async so we must make
// this method async as well.
const result = yield window.crypto.subtle.verify(algo, cryptoKey, signatureArray, dataArray);
return result;
});
}
createSign(algorithm) {
throw new Error('createSign is not implemented in BrowserCrypto');
}
decodeBase64StringUtf8(base64) {
const uint8array = base64js.toByteArray(base64);
const result = new TextDecoder().decode(uint8array);
return result;
}
encodeBase64StringUtf8(text) {
const uint8array = new TextEncoder().encode(text);
const result = base64js.fromByteArray(uint8array);
return result;
}
}
exports.BrowserCrypto = BrowserCrypto;
//# sourceMappingURL=crypto.js.map