signature-sdk-js

A JavaScript package for creating digital signatures using RSA encryption and PEM encoding.

Installation

You can install signature-sdk-js via npm or yarn:

npm install signature-sdk-js

yarn add signature-sdk-js

Usage

To use signature-sdk-js, follow these steps:

1. Import the package:

import { createSignature } from "signature-sdk-js";

2. Call the createSignature function with the appropriate parameters:

const data = "Your data to be signed";
const privateKeyString = "Your private key in PEM format";
const dateNow = new Date(); // Current date and time

try {
  const result = createSignature(data, privateKeyString, dateNow);
  console.log("Signature:", result.signature);
  console.log("Timestamp:", result.timestamp);
} catch (error) {
  console.error("Error:", error.message);
}

Parameters:

• data: A non-empty string representing the data to be signed.
• privateKeyString: A non-empty string containing the private key in PEM format.
• dateNow: A valid Date object representing the current date and time.

Returns:

An object containing the following properties:

• signature: The generated signature encoded in Base64 format.
• timestamp: The timestamp of when the signature was created (in seconds).

Example:

const data = "Hello, world!";
const privateKeyString = "-----BEGIN PRIVATE KEY-----\nYour private key here\n-----END PRIVATE KEY-----";
const dateNow = new Date();

try {
  const result = createSignature(data, privateKeyString, dateNow);
  console.log("Signature:", result.signature);
  console.log("Timestamp:", result.timestamp);
} catch (error) {
  console.error("Error:", error.message);
}