java仿MD5格式的DES加解密源码

import javax.crypto.Cipher; import javax.crypto.SecretKeyFactory; import javax.crypto.spec.DESKeySpec; import javax.crypto.spec.IvParameterSpec; public static String desen(String CDKEY, String sKey) { try { DESKeySpec desKeySpec = new DESKeySpec(sKey.getBytes(StandardCharsets.UTF_8)); SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES"); byte[] keyBytes = keyFactory.generateSecret(desKeySpec).getEncoded(); IvParameterSpec iv = new IvParameterSpec(keyBytes); Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding"); cipher.init(Cipher.ENCRYPT_MODE, keyFactory.generateSecret(desKeySpec), iv); byte[] encryptedBytes = cipher.doFinal(CDKEY.getBytes(StandardCharsets.UTF_8)); StringBuilder stringBuilder = new StringBuilder(); for (byte b : encryptedBytes) { stringBuilder.append(String.format("%02X", b)); } return stringBuilder.toString(); } catch (Exception e) { e.printStackTrace(); } return null; } public static String desout(String CDKEY, String sKey) { try { byte[] keyBytes = sKey.getBytes(StandardCharsets.US_ASCII); byte[] ivBytes = sKey.getBytes(StandardCharsets.US_ASCII); DESKeySpec desKeySpec = new DESKeySpec(keyBytes); SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES"); IvParameterSpec ivSpec = new IvParameterSpec(ivBytes); Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding"); cipher.init(Cipher.DECRYPT_MODE, keyFactory.generateSecret(desKeySpec), ivSpec); byte[] encryptedBytes = new byte[CDKEY.length() / 2]; for (int i = 0; i < CDKEY.length() / 2; i++) { int num = Integer.parseInt(CDKEY.substring(i * 2, i * 2 + 2), 16); encryptedBytes[i] = (byte) num; } ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); outputStream.write(cipher.doFinal(encryptedBytes)); return new String(outputStream.toByteArray(), StandardCharsets.UTF_8); } catch (Exception e) { return CDKEY; } }