License Keys NPM-Package

License Keys NPM-Package is a Node.js package that allows you to generate, encrypt, and verify license keys using MySQL and OpenPGP.js.

Table of Contents

• Installation
• Usage
• API
  • createKey
  • verifyKey
  • generateKeyPair
• Contributing

Installation

npm install license-keys

Usage

const { createKey, verifyKey, generateKeyPair } = require("license-keys");

// Generate a PGP key pair
(async () => {
    const keyPair = await generateKeyPair("John Doe", "[email protected]", "secure-passphrase");
    console.log(keyPair);
})();

// Generate a license key and store it in a MySQL database
(async () => {
    const options = {
        length: 4,
        charset: "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890",
        MySQL: {
            host: "localhost",
            user: "root",
            password: "password",
            database: "license_keys",
            tableName: "user_keys",
            columnName: "license_key"
        },
        OpenPGP: {
            publicKey: "-----BEGIN PGP PUBLIC KEY BLOCK----- ... -----END PGP PUBLIC KEY BLOCK-----"
        }
    };

    const key = await createKey(options);
    console.log(key);
})();

// Verify a license key
(async () => {
    const options = {
        key: "ABC1-DEF2-GHI3-JKL4",
        MySQL: {
            host: "localhost",
            user: "root",
            password: "password",
            database: "license_keys",
            tableName: "user_keys",
            columnName: "license_key"
        },
        OpenPGP: {
            privateKey: "-----BEGIN PGP PRIVATE KEY BLOCK----- ... -----END PGP PRIVATE KEY BLOCK-----",
            passphrase: "secure-passphrase"
        }
    };

    const result = await verifyKey(options);
    console.log(result);
})();

API

createKey

Generates a license key based on the provided options, encrypts it with a public key (if provided), and stores it in the MySQL database.

createKey(options)

Parameters

• options: (Object)
  • length: (number) The length of each segment in the generated key.
  • charset: (string, optional) The character set to use when generating the key.
  • MySQL: (Object) MySQL-related options.
    • host: (string) MySQL server host.
    • user: (string) MySQL user.
    • password: (string) MySQL password.
    • database: (string) MySQL database.
    • tableName: (string) MySQL table name.
    • columnName: (string) MySQL table column name.
  • OpenPGP: (Object)
    • publicKey: (string) PGP public key.

Returns

• A promise that resolves to an object containing:
  • plainText: (string) The generated plain text key.
  • encrypted: (string) The encrypted key (if a public key is provided).

verifyKey

Receives a license key and checks if it exists within the MySQL database, then verifies it and removes it.

verifyKey(options)

Parameters

• options: (Object)
  • key: (string) The license key to verify.
  • MySQL: (Object) MySQL-related options.
    • host: (string) MySQL server host.
    • user: (string) MySQL user.
    • password: (string) MySQL password.
    • database: (string) MySQL database.
    • tableName: (string) MySQL table name containing the license keys.
    • columnName: (string) MySQL table column name containing the license keys.
  • OpenPGP: (Object) OpenPGP-related options.
    • privateKey: (string) The private key used for decrypting the license key.
    • passphrase: (string) The passphrase used for decrypting the license key.

Returns

• Promise<boolean>: A promise that resolves to a boolean indicating if the license key was verified and removed from the MySQL database.

generateKeyPair

Generates a PGP key pair.

generateKeyPair(name, email, passphrase)

Parameters

• name: (string) The user name associated with the key. the key pair.
• email: (string) The email address associated with the key pair.
• passphrase: (string) The passphrase to use for protecting the private key.

Returns

• Promise<{publicKey: string, privateKey: string}>: A promise that resolves to an object containing the generated public and private keys as strings.

Contributing

Contributions are welcome! If you have any suggestions, improvements, or issues, feel free to open a pull request or create an issue on the GitHub repository.