@aws-amplify/auth
Version:
Auth category of aws-amplify
41 lines (39 loc) • 1.7 kB
JavaScript
;
// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
Object.defineProperty(exports, "__esModule", { value: true });
exports.getAuthenticationHelper = void 0;
const AuthenticationHelper_1 = require("./AuthenticationHelper");
const BigInteger_1 = require("./BigInteger");
const calculate_1 = require("./calculate");
const constants_1 = require("./constants");
const getHexFromBytes_1 = require("./getHexFromBytes");
const getRandomBytes_1 = require("./getRandomBytes");
/**
* Returns a new {@link AuthenticationHelper} instance with randomly generated BigInteger seed
*
* @param userPoolName Cognito user pool name.
* @returns An {@link AuthenticationHelper} instance.
*
* @internal
*/
const getAuthenticationHelper = async (userPoolName) => {
const N = new BigInteger_1.BigInteger(constants_1.INIT_N, 16);
const g = new BigInteger_1.BigInteger('2', 16);
const a = generateRandomBigInteger();
const A = await (0, calculate_1.calculateA)({ a, g, N });
return new AuthenticationHelper_1.AuthenticationHelper({ userPoolName, a, g, A, N });
};
exports.getAuthenticationHelper = getAuthenticationHelper;
/**
* Generates a random BigInteger.
*
* @returns {BigInteger} a random value.
*/
const generateRandomBigInteger = () => {
// This will be interpreted as a postive 128-bit integer
const hexRandom = (0, getHexFromBytes_1.getHexFromBytes)((0, getRandomBytes_1.getRandomBytes)(128));
// There is no need to do randomBigInt.mod(this.N - 1) as N (3072-bit) is > 128 bytes (1024-bit)
return new BigInteger_1.BigInteger(hexRandom, 16);
};
//# sourceMappingURL=getAuthenticationHelper.js.map