@aws-amplify/core/dist/cjs/utils/WordArray.js

Core category of aws-amplify

'use strict';

// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
Object.defineProperty(exports, "__esModule", { value: true });
exports.WordArray = void 0;
const cryptoSecureRandomInt_1 = require("./cryptoSecureRandomInt");
/**
 * Hex encoding strategy.
 * Converts a word array to a hex string.
 * @param {WordArray} wordArray The word array.
 * @return {string} The hex string.
 * @static
 */
function hexStringify(wordArray) {
    // Shortcuts
    const { words } = wordArray;
    const { sigBytes } = wordArray;
    // Convert
    const hexChars = [];
    for (let i = 0; i < sigBytes; i++) {
        const bite = (words[i >>> 2] >>> (24 - (i % 4) * 8)) & 0xff;
        hexChars.push((bite >>> 4).toString(16));
        hexChars.push((bite & 0x0f).toString(16));
    }
    return hexChars.join('');
}
class WordArray {
    constructor(words, sigBytes) {
        this.words = [];
        let Words = words;
        Words = this.words = Words || [];
        if (sigBytes !== undefined) {
            this.sigBytes = sigBytes;
        }
        else {
            this.sigBytes = Words.length * 4;
        }
    }
    random(nBytes) {
        const words = [];
        for (let i = 0; i < nBytes; i += 4) {
            words.push((0, cryptoSecureRandomInt_1.cryptoSecureRandomInt)());
        }
        return new WordArray(words, nBytes);
    }
    toString() {
        return hexStringify(this);
    }
}
exports.WordArray = WordArray;
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