byte[] key = decodeHex(PIN_ENCRYPTED_KEY.toCharArray());
Cipher cipher = Cipher.getInstance("DESede/ECB/NoPadding");
cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(key, "DESede"));
byte[] bytesStr = decodeHex(str.toCharArray());
byte[] decrypted = cipher.doFinal(bytesStr);
String retVal = new String(decrypted, StandardCharsets.UTF_8);

private String cryptCode(String code, String str) throws DecoderException, NoSuchPaddingException, NoSuchAlgorithmException, BadPaddingException, IllegalBlockSizeException, InvalidKeyException, UnsupportedEncodingException {
        Cipher cipher = Cipher.getInstance("DESede/ECB/NoPadding");

        String pan = CODE_PREFIX + str.substring(str.length() - 1 - 12, str.length() - 1);
        byte[] bytesCode = decodeHex(code.toCharArray());
        byte[] bytesPan = decodeHex(pan.toCharArray());
        byte[] bytesTpk = decodeHex(CODE_ENCRYPTED_KEY.toCharArray());
        byte[] bytesOut = new byte[8];
        Arrays.fill(bytesOut, (byte) 0xff);
        bytesOut[0] = 4;             
        bytesOut[1] = bytesCode[0];
        bytesOut[2] = bytesCode[1];

        for (int i = 0; i < bytesPan.length; i++) {
            bytesOut[i] = (byte) (((int) bytesOut[i]) ^ ((int) bytesPan[i]));
        }
        System.out.println(new String(bytesOut, StandardCharsets.UTF_8));
        String bytes = "";
        for(int i = 0; i < bytesOut.length; i++) {
            bytes += (bytesOut[i] + " ");
        }
        System.out.println(bytes.trim());
        byte[] fullKey = new byte[24];
        System.arraycopy(bytesTpk, 0, fullKey, 0, 16);
        System.arraycopy(bytesTpk, 0, fullKey, 16, 8);
        cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(fullKey, "DESede"));
        char[] chars = encodeHex(cipher.doFinal(bytesOut));
        String res = new String(chars);
        System.out.println(res);
        return decryptPin(res);
    }
    //Дешифрование
    private String decryptCode(String code) throws DecoderException, NoSuchPaddingException, NoSuchAlgorithmException, BadPaddingException, IllegalBlockSizeException, InvalidKeyException, UnsupportedEncodingException {
        byte[] bytesTpk = decodeHex(CODE_ENCRYPTED_KEY.toCharArray());
        byte[] fullKey = new byte[24];
        System.arraycopy(bytesTpk, 0, fullKey, 0, 16);
        System.arraycopy(bytesTpk, 0, fullKey, 16, 8);
        Cipher cipher = Cipher.getInstance("DESede/ECB/NoPadding");
        cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(fullKey, "DESede"));
        byte[] bytesCode = decodeHex(code.toCharArray());
        byte[] decrypted = cipher.doFinal(bytesCode);
        String retVal = new String(decrypted, StandardCharsets.UTF_8);
        String bytes = "";
        for(int i = 0; i < decrypted.length; i++) {
            bytes += (decrypted[i] + " ");
        }
        System.out.println(bytes.trim());
        System.out.println(retVal);
        return retVal;
    }

for (int i = 0; i < bytesPan.length; i++) {
            bytesOut[i] = (byte) (((int) bytesOut[i]) ^ ((int) bytesPan[i]));
        }

public void main(String[] args) throws NoSuchPaddingException, UnsupportedEncodingException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidKeyException {
       System.out.println(cryptCode("1234", "1234567812345678"));
}