FP-Growth-in-Python

Coding FP-Growth in python from scratch

import javax.crypto.; import javax.crypto.spec.;

public class DesxDecryption {

public static void main(String[] args) throws Exception {
    byte[] keyBytes = "secretkey".getBytes();
    byte[] ivBytes = "initializ".getBytes();
    byte[] ciphertext = new byte[] {...}; // replace with actual ciphertext
    
    // Create DES key from first 8 bytes of keyBytes
    DESKeySpec desKeySpec = new DESKeySpec(keyBytes, 0);
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
    SecretKey desKey = keyFactory.generateSecret(desKeySpec);
    
    // Create DESX key from keyBytes
    byte[] desxKeyBytes = new byte[24];
    System.arraycopy(keyBytes, 0, desxKeyBytes, 0, 8);
    System.arraycopy(keyBytes, 0, desxKeyBytes, 8, 8);
    System.arraycopy(keyBytes, 0, desxKeyBytes, 16, 8);
    SecretKeySpec desxKeySpec = new SecretKeySpec(desxKeyBytes, "DESede");
    
    // Create cipher using DESX key and IV
    Cipher cipher = Cipher.getInstance("DESede/CBC/PKCS5Padding");
    cipher.init(Cipher.DECRYPT_MODE, desxKeySpec, new IvParameterSpec(ivBytes));
    
    // Decrypt ciphertext
    byte[] plaintext = cipher.doFinal(ciphertext);
    System.out.println(new String(plaintext));
}

}