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Create SecretKey

import java.security.Key; import javax.crypto.Cipher; import javax.crypto.KeyGenerator; import javax.crypto.SecretKey; import javax.crypto.SecretKeyFactory; import javax.crypto.spec.PBEKeySpec; import javax.crypto.spec.PBEParameterSpec; public class MainClass {   public static void main(String[] args) throws Exception {     KeyGenerator kg = KeyGenerator.getInstance("DESede");     Key sharedKey = kg.generateKey();     String password = "password";     byte[] salt = "salt1234".getBytes();     PBEParameterSpec paramSpec = new PBEParameterSpec(salt, 20);     PBEKeySpec keySpec = new PBEKeySpec(password.toCharArray());     SecretKeyFactory kf = SecretKeyFactory.getInstance("PBEWithMD5AndDES");     SecretKey passwordKey = kf.generateSecret(keySpec);     Cipher c = Cipher.getInstance("PBEWithMD5AndDES");     c.init(Cipher.WRAP_MODE, passwordKey, paramSpec);     byte[] wrappedKey = c.wrap(sharedKey);     c = Cipher.getInstance("DESede");     c.init(Cipher.ENCRYPT_MODE, sharedKey);     byte[] input = "input".getBytes();     byte[] encrypted = c.doFinal(input);     c = Cipher.getInstance("PBEWithMD5AndDES");     c.init(Cipher.UNWRAP_MODE, passwordKey, paramSpec);     Key unwrappedKey = c.unwrap(wrappedKey, "DESede", Cipher.SECRET_KEY);     c = Cipher.getInstance("DESede");     c.init(Cipher.DECRYPT_MODE, unwrappedKey);     System.out.println(new String(c.doFinal(encrypted)));   } }