Raju cns

Experiment 5: Write a C/JAVA program to implement the BlowFish algorithm logic.

 
Source code:
import java.io.*;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.security.Key;
import javax.crypto.Cipher;
import javax.crypto.CipherOutputStream;
import javax.crypto.KeyGenerator;
import java.util.Base64;

public class BlowFish {
    public static void main(String[] args) throws Exception {
        // Generate Blowfish key
        KeyGenerator keyGenerator = KeyGenerator.getInstance("Blowfish");
        keyGenerator.init(128);
        Key secretKey = keyGenerator.generateKey();

        // Initialize cipher for encryption
        Cipher cipherOut = Cipher.getInstance("Blowfish/CFB/NoPadding");
        cipherOut.init(Cipher.ENCRYPT_MODE, secretKey);

        // Corrected Encoder usage
        Encoder encoder=new Encoder();
        byte iv[] = cipherOut.getIV();
        if (iv != null) {
            System.out.println("Initialization Vector of the Cipher: " + Base64.getEncoder().encodeToString(iv));
        }

        // File handling
        FileInputStream fin = new FileInputStream("inputFile.txt");
        FileOutputStream fout = new FileOutputStream("outputFile.txt");
        CipherOutputStream cout = new CipherOutputStream(fout, cipherOut);

        // Encrypt file content
        int input;
        while ((input = fin.read()) != -1) {
            cout.write(input);
        }

        // Close streams
        fin.close();
        cout.close();
    }
}

 
Output:
Initialization Vector of the Cipher: dI1MXzW97oQ=
Contents of inputFile.txt: Hello World
Contents of outputFile.txt: ùJÖ˜ NåI“