61 lines
2.2 KiB
JavaScript
61 lines
2.2 KiB
JavaScript
/*! @azure/msal-node v2.5.1 2023-11-07 */
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'use strict';
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import { Constants } from '@azure/msal-common';
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import { RANDOM_OCTET_SIZE, CharSet } from '../utils/Constants.mjs';
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import { EncodingUtils } from '../utils/EncodingUtils.mjs';
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import { HashUtils } from './HashUtils.mjs';
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import crypto from 'crypto';
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/*
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* Copyright (c) Microsoft Corporation. All rights reserved.
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* Licensed under the MIT License.
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*/
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/**
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* https://tools.ietf.org/html/rfc7636#page-8
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*/
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class PkceGenerator {
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constructor() {
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this.hashUtils = new HashUtils();
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}
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/**
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* generates the codeVerfier and the challenge from the codeVerfier
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* reference: https://tools.ietf.org/html/rfc7636#section-4.1 and https://tools.ietf.org/html/rfc7636#section-4.2
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*/
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async generatePkceCodes() {
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const verifier = this.generateCodeVerifier();
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const challenge = this.generateCodeChallengeFromVerifier(verifier);
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return { verifier, challenge };
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}
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/**
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* generates the codeVerfier; reference: https://tools.ietf.org/html/rfc7636#section-4.1
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*/
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generateCodeVerifier() {
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const charArr = [];
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const maxNumber = 256 - (256 % CharSet.CV_CHARSET.length);
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while (charArr.length <= RANDOM_OCTET_SIZE) {
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const byte = crypto.randomBytes(1)[0];
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if (byte >= maxNumber) {
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/*
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* Ignore this number to maintain randomness.
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* Including it would result in an unequal distribution of characters after doing the modulo
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*/
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continue;
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}
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const index = byte % CharSet.CV_CHARSET.length;
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charArr.push(CharSet.CV_CHARSET[index]);
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}
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const verifier = charArr.join(Constants.EMPTY_STRING);
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return EncodingUtils.base64EncodeUrl(verifier);
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}
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/**
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* generate the challenge from the codeVerfier; reference: https://tools.ietf.org/html/rfc7636#section-4.2
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* @param codeVerifier
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*/
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generateCodeChallengeFromVerifier(codeVerifier) {
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return EncodingUtils.base64EncodeUrl(this.hashUtils.sha256(codeVerifier).toString("base64"), "base64");
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}
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}
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export { PkceGenerator };
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//# sourceMappingURL=PkceGenerator.mjs.map
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