import java.io.*;
import java.security.*;

class CryptAndDecrypt {

    public static void main(String[] args) {

        try
        {

           KeyPair keyPair = org.alliacom.crypto.RSAEncryptor.generateKeys(512);
           RSAEncryptor myEncryptor = new org.alliacom.crypto.RSAEncryptor(keyPair.getPublic());
           FileInputStream fis = new FileInputStream("c:/crypto/data.txt");
           FileOutputStream fos = new FileOutputStream("c:/crypto/cryptedData.txt");
           myEncryptor.encryptStream(fis, fos);
           System.out.println("Fichier crypté !");
           RSAEncryptor myDecryptor = new org.alliacom.crypto.RSAEncryptor(keyPair.getPrivate());
           FileInputStream cryptedStream = new FileInputStream("c:/crypto/cryptedData.txt");
           FileOutputStream clearStream = new FileOutputStream("c:/crypto/decryptedData.txt");
           myDecryptor.decryptStream(cryptedStream, clearStream);
           System.out.println("Fichier décrypté !");


        } catch (Exception e) {
            System.err.println("Exception trappée " + e.toString());
        }

    };
}