Android DES加密实现

private static final byte[] DESkey = { 39, 35, 96, 46, 10, 81, 111, 47 };// 设置密钥
private static final byte[] DESIV = { 15, 12, 107, 29, 11, 21, 114, 36 };// 设置向量

static AlgorithmParameterSpec iv = null;// 加密算法的参数接口，IvParameterSpec是它的一个实例
private static Key key = null;

/**
* 加密
*
* @param data
* @return
* @throws Exception
*/
public static String encode(String data) throws Exception {
init(DESkey, DESIV);
Cipher enCipher = Cipher.getInstance("DES/CBC/PKCS5Padding");// 得到加密对象Cipher
enCipher.init(Cipher.ENCRYPT_MODE, key, iv);// 设置工作模式为加密模式，给出密钥和向量
byte[] pasByte = enCipher.doFinal(data.getBytes("utf-8"));
return Base64.encodeToString(pasByte, Base64.NO_WRAP);
}

private static void init(byte[] DESkey, byte[] DESIV) {
DESKeySpec keySpec;
try {
keySpec = new DESKeySpec(DESkey);// 设置密钥参数
iv = new IvParameterSpec(DESIV);// 设置向量
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");// 获得密钥工厂
key = keyFactory.generateSecret(keySpec);// 得到密钥对象
} catch (InvalidKeyException e) {
e.printStackTrace();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (InvalidKeySpecException e) {
e.printStackTrace();
}
}

/**
* 解密
*
* @param data
* @return
* @throws Exception
*/
public static String decode(String data) throws Exception {
init(DESkey, DESIV);
Cipher deCipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
deCipher.init(Cipher.DECRYPT_MODE, key, iv);
byte[] pasByte = deCipher.doFinal(Base64.decode(data, Base64.DEFAULT));
return new String(pasByte, "UTF-8");
}