Windows上加解密正常,linux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*..)
at chb.test.crypto.AESUtils.crypt(AESUtils.java:386)
at chb.test.crypto.AESUtils.AesDecrypt(AESUtils.java:254)
at chb.test.crypto.AESUtils.main(AESUtils.java:40)
  解决方法:
  经过检查之后,定位在生成KEY的方法上,如下:
public static SecretKey getKey (String strKey) {
try {
KeyGenerator _generator = KeyGenerator.getInstance( "AES" );
_generator.init(128, new SecureRandom(strKey.getBytes()));
return _generator.generateKey();
}  catch (Exception e) {
throw new RuntimeException( " 初始化密钥出现异常 " );
}
}
  修改到如下方式,问题解决:
public static SecretKey getKey(String strKey) {
try {
KeyGenerator _generator = KeyGenerator.getInstance( "AES" );
SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG" );
secureRandom.setSeed(strKey.getBytes());
_generator.init(128,secureRandom);
return _generator.generateKey();
}  catch (Exception e) {
throw new RuntimeException( " 初始化密钥出现异常 " );
}
}
  原因分析
  SecureRandom 实现完全?操作系统本身的?部??,除非?用方在?用 getInstance 方法之後又?用了 setSeed 方法;该实现在 windows 上每次生成的 key 都相同,但是在 solaris 或部分 linux 系统上则不同。