WMSigner for the Java platform (WMSignerJX)

This article is intended for software developers using WebMoney Transfer interfaces in Java applications.

Purpose of the article: explain the basics of working with the webmoney.cryptography [java] library (code name WMSignerJX).

The webmoney.cryptography [java] library is used for obtaining the digital signature of a message with a private WM Keeper WinPro key. The library is a clone of the WMSignerFX library.

The latest version of the library is 1.0.

An example demonstrating the process of obtaining a signature using Java:

package webmoney.examination;

import java.io.UnsupportedEncodingException;

import webmoney.cryptography.Signer;

public class Program {
   public static void main(String[] args) throws UnsupportedEncodingException {

      byte[] exponent = new byte[]{(byte) 0x7D, (byte) 0xB2, (byte) 0x36, (byte) 0x08, (byte) 0xBD, (byte) 0x9E, (byte) 0x8C, (byte) 0x0F, (byte) 0xA8, (byte) 0xED, (byte) 0xAE, (byte) 0x02, (byte) 0x6C, (byte) 0x29, (byte) 0x59, (byte) 0x1B, (byte) 0x22, (byte) 0xB0, (byte) 0xCF, (byte) 0x37, (byte) 0xC2, (byte) 0xFE, (byte) 0xA7, (byte) 0x13, (byte) 0xB1, (byte) 0x29, (byte) 0xBF, (byte) 0x0B, (byte) 0x88, (byte) 0x57, (byte) 0xC0, (byte) 0x59, (byte) 0x1B, (byte) 0xBD, (byte) 0xA4, (byte) 0xE9, (byte) 0xB3, (byte) 0x1D, (byte) 0x2E, (byte) 0xCC, (byte) 0x5F, (byte) 0xA0, (byte) 0x8F, (byte) 0xE0, (byte) 0x9D, (byte) 0xE6, (byte) 0xA1, (byte) 0xE5, (byte) 0x0C, (byte) 0x6C, (byte) 0xEE, (byte) 0x9B, (byte) 0xD2, (byte) 0x67, (byte) 0xE3, (byte) 0x90, (byte) 0x10, (byte) 0xCE, (byte) 0xBD, (byte) 0x58, (byte) 0xFE, (byte) 0xAA, (byte) 0x28, (byte) 0xBB, (byte) 0xBF, (byte) 0x00};
      byte[] modulus = new byte[]{(byte) 0x55, (byte) 0x1F, (byte) 0xFF, (byte) 0x9E, (byte) 0xC2, (byte) 0xFE, (byte) 0xF3, (byte) 0x4C, (byte) 0xD0, (byte) 0x02, (byte) 0x67, (byte) 0xBE, (byte) 0xB9, (byte) 0xD7, (byte) 0xCF, (byte) 0x6A, (byte) 0x72, (byte) 0x63, (byte) 0x66, (byte) 0xE4, (byte) 0xC9, (byte) 0x5D, (byte) 0xB5, (byte) 0x62, (byte) 0x77, (byte) 0x44, (byte) 0x3C, (byte) 0x42, (byte) 0x7B, (byte) 0x65, (byte) 0x9D, (byte) 0xF0, (byte) 0x1E, (byte) 0x76, (byte) 0xBE, (byte) 0x7B, (byte) 0x4D, (byte) 0x99, (byte) 0xC5, (byte) 0x8C, (byte) 0xA4, (byte) 0xA6, (byte) 0x09, (byte) 0x62, (byte) 0x6C, (byte) 0xA4, (byte) 0x91, (byte) 0x94, (byte) 0xEE, (byte) 0xC2, (byte) 0xEC, (byte) 0xDD, (byte) 0x53, (byte) 0xF5, (byte) 0x73, (byte) 0x46, (byte) 0xEC, (byte) 0xD6, (byte) 0xE1, (byte) 0xB0, (byte) 0xD4, (byte) 0xCB, (byte) 0xD6, (byte) 0xF0, (byte) 0x6E, (byte) 0x05};

      Signer signer = new Signer(exponent, modulus);

      String signature = signer.sign("message"); // подпись строки


To execute this code add a link to the webmoney.cryptography [java] library to your project.

An object of the Signer class is initialized with a private exponent and modulus that can be read from a WM Keeper WinPro private key file (*.kwm) with the help of Key Extractor.

Resource links