Java Cipher get instance "DES/CBC/PKCS7Padding"

import java.util.Base64;

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

public class Main {
   public static void main(String[] args) throws Exception {
      byte[] input = new byte[] { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d,
            0x0e, 0x0f, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07 };
      byte[] keyBytes = new byte[] { 0x01, 0x23, 0x45, 0x67, (byte) 0x89, (byte) 0xab, (byte) 0xcd, (byte) 0xef };
      byte[] ivBytes = new byte[] { 0x07, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x00 };

      SecretKeySpec key = new SecretKeySpec(keyBytes, "DES");
      IvParameterSpec ivSpec = new IvParameterSpec(new byte[8]);
      Cipher cipher = Cipher.getInstance("DES/CBC/PKCS7Padding", "BC");

      System.out.println("input : " + Base64.getEncoder().encodeToString(input));

      // encryption pass

      cipher.init(Cipher.ENCRYPT_MODE, key, ivSpec);

      byte[] cipherText = new byte[cipher.getOutputSize(ivBytes.length + input.length)];

      int ctLength = cipher.update(ivBytes, 0, ivBytes.length, cipherText, 0);

      ctLength += cipher.update(input, 0, input.length, cipherText, ctLength);

      ctLength += cipher.doFinal(cipherText, ctLength);

      System.out.println("cipher: " + Base64.getEncoder().encodeToString(cipherText) + " bytes: " + ctLength);

      // decryption pass

      cipher.init(Cipher.DECRYPT_MODE, key, ivSpec);

      byte[] buf = new byte[cipher.getOutputSize(ctLength)];

      int bufLength = cipher.update(cipherText, 0, ctLength, buf, 0);

      bufLength += cipher.doFinal(buf, bufLength);

      // remove the iv from the start of the message

      byte[] plainText = new byte[bufLength - ivBytes.length];

      System.arraycopy(buf, ivBytes.length, plainText, 0, plainText.length);

      System.out.println("plain : " + Base64.getEncoder().encodeToString(plainText) + " bytes: " + plainText.length);
   }/*ww w.  j ava 2s.  c o  m*/
}