keygentoolshed/keyGen/gs1keygenerator.js

Key generation utilities for cryptographic operations. QUANTUM ENCRYPTION FOLDER UPDATE!!! See its folder for all <3

// whatever nerd is reading my code this was inspired by gs1-key (https://www.npmjs.com/package/gs1-key)

import fs from 'fs';
import path from 'path';

function calculateCheckDigit(gtin) {
    const digits = gtin.split('').map(Number);
    const sum = digits.slice(0, -1).reduce((acc, digit, index) => {
        return acc + (index % 2 === 0 ? digit : digit * 3);
    }, 0);
    const checkDigit = (10 - (sum % 10)) % 10;
    return checkDigit;
}

function generateGS1Key(format) {
    let key = '';
    const length = {
        'GTIN-8': 7,
        'GTIN-12': 11,
        'GTIN-13': 12,
        'GTIN-14': 13,
        'GSIN': 13,
        'SSCC': 18
    }[format];

    if (!length) {
        throw new Error('Invalid format specified.');
    }

    for (let i = 0; i < length; i++) {
        key += Math.floor(Math.random() * 10).toString();
    }

    const checkDigit = calculateCheckDigit(key);
    key += checkDigit;

    return key;
}

const args = process.argv.slice(2);
let format = '';

if (args.length === 0) {
    console.error('No format provided. Use --format followed by the format (GTIN-8, GTIN-12, GTIN-13, GTIN-14, GSIN, SSCC).');
    process.exit(1);
}

for (let i = 0; i < args.length; i++) {
    if (args[i] === '--format') {
        format = args[i + 1];
        break;
    }
}

if (!format) {
    console.error('Format not specified. Use --format followed by the format.');
    process.exit(1);
}

try {
    const gs1Key = generateGS1Key(format);
    console.log(`Generated ${format}: ${gs1Key}`);
} catch (error) {
    console.error('Error generating GS1 key:', error.message);
}