JAVA的DES加密解密在windows上测试一切正常，在linux上异常

windows上加解密正常，linux上加密正常，解密时发生 如下异常，异常信息如下：

[ERROR] 2018-10-15 09:30:35,998 method:com.iscas.ippc.common.utils.RandomPwd.decrypt(RandomPwd.java:120)
decrypt Exception is Given final block not properly padded. Such issues can arise if a bad key is used during decryption.
javax.crypto.BadPaddingException: Given final block not properly padded. Such issues can arise if a bad key is used during decryption.
at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:991)
at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:847)
at com.sun.crypto.provider.DESCipher.engineDoFinal(DESCipher.java:314)
at javax.crypto.Cipher.doFinal(Cipher.java:2164)

 

Des修改方式如下：

private static SecretKeySpec getSecretKey() {
//返回生成指定算法密钥生成器的 KeyGenerator 对象
KeyGenerator kg = null;

try {
kg = KeyGenerator.getInstance(KEY_ALGORITHM);

//DES 要求密钥长度为 256
SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
random.setSeed(KEY_STRING.getBytes());
kg.init(56,random);

//生成一个密钥
SecretKey secretKey = kg.generateKey();

return new SecretKeySpec(secretKey.getEncoded(), KEY_ALGORITHM);// 转换为DES专用密钥

} catch (NoSuchAlgorithmException e) {
logger.error("getSecretKey Exception is "+e.getMessage(),e);
}

return null;
}

主要是SecureRandom 红色部分的问题，

修改前：

kg.init(56,new SecureRandom(key.getBytes()));

修改成下面的代码即可：

SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
random.setSeed(KEY_STRING.getBytes());