Курсовая работа: Анализ предметной области

КодклассаDigitalSignature

import java.io.BufferedInputStream;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.security.KeyFactory;

import java.security.KeyPair;

import java.security.KeyPairGenerator;

import java.security.PrivateKey;

import java.security.PublicKey;

import java.security.SecureRandom;

import java.security.Signature;

import java.security.spec.X509EncodedKeySpec;

public class DigitalSignature {

public static void saveToFile (byte[] info, String filename) {

try {

FileOutputStream fos = new FileOutputStream(filename);

fos.write(info);

fos.close();

}

catch (Exception e){}

}

public static byte[] readFromFile (String fileName) {

byte[] info;

try {

FileInputStream fis = new FileInputStream(fileName);

info = new byte[fis.available()];

fis.read(info);

fis.close();

}