现象描述：
windows上加解密正常，MAC上加密正常，解密时发生如下异常：
javax.crypto.BadPaddingException: Given final block not properly padded
at com.sun.crypto.provider.SunJCE_f.b(DashoA13*..)
at com.sun.crypto.provider.SunJCE_f.b(DashoA13*..)
at com.sun.crypto.provider.AESCipher.engineDoFinal(DashoA13*..)
at javax.crypto.Cipher.doFinal(DashoA13*..)
解决后代码如下：
KeyGenerator keyGen = KeyGenerator.getInstance("AES");
String pwd = "passord";
SecureRandom random=SecureRandom.getInstance("SHA1PRNG");
random.setSeed(pwd.getBytes());
keyGen.init(128, random);
SecretKey skey = keyGen.generateKey();
byte[] raw = skey.getEncoded();
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
