recoverable-random/dist/utils.js

A recoverable number generator that generates pseudorandom integer or floating-point numbers within a given range.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.generateShortNumericHash = void 0;
const md5_1 = require("./md5");
function generateShortNumericHash(data) {
    if (typeof data !== "string") {
        throw new TypeError("Input data must be a string");
    }
    // Generate MD5 hash
    const md5Hash = md5_1.default.hashStr(data, true);
    // XOR the first half of the digest with the second half
    const xorResult = Buffer.alloc(md5Hash.length / 2);
    for (let i = 0; i < xorResult.length; i++) {
        xorResult[i] = md5Hash[i] ^ md5Hash[i + xorResult.length];
    }
    // Get the length of the original data
    const dataLength = Buffer.alloc(4);
    dataLength.writeUInt32BE(data.length);
    // Concatenate the XOR result and data length
    const combinedBuffer = Buffer.concat([xorResult, dataLength]);
    // Convert the combined buffer to a string of numeric characters
    let numericString = "";
    for (let i = 0; i < combinedBuffer.length; i++) {
        numericString += combinedBuffer[i].toString().padStart(3, "0");
    }
    return numericString;
}
exports.generateShortNumericHash = generateShortNumericHash;