所以它使用的256块大小,但现在的hello world看起来像这样http://pastebin.com/5sXhMV11,我不能找出我应该RTRIM使用()来我所进行的更改到C#代码在最后得到一团糟。
另外,当你说IV应该是随机的,这是否意味着不要使用相同的IV多于一次,或者是我编写错误的方式?
再次感谢!
嗨,
我试图解密与在C#中被加密PHP的字符串。我似乎无法让PHP使用mcrypt解密,并可以做一些帮助。我得到以下错误与PHP,所以我猜我没有正确设置IV。
错误:IV参数必须是只要块大小
两个函数都使用相同的密码,密钥,IV和设置为CBC模式:
加密文本从C#= UmzUCnAzThH0nMkIuMisqg ==
键32长= qwertyuiopasdfghjklzxcvbnmqwerty
IV 16长= 123456789
C#
public static string EncryptString(string message, string KeyString, string IVString)
{
byte[] Key = ASCIIEncoding.UTF8.GetBytes(KeyString);
byte[] IV = ASCIIEncoding.UTF8.GetBytes(IVString);
string encrypted = null;
RijndaelManaged rj = new RijndaelManaged();
rj.Key = Key;
rj.IV = IV;
rj.Mode = CipherMode.CBC;
try
{
MemoryStream ms = new MemoryStream();
using (CryptoStream cs = new CryptoStream(ms, rj.CreateEncryptor(Key, IV), CryptoStreamMode.Write))
{
using (StreamWriter sw = new StreamWriter(cs))
{
sw.Write(message);
sw.Close();
}
cs.Close();
}
byte[] encoded = ms.ToArray();
encrypted = Convert.ToBase64String(encoded);
ms.Close();
}
catch (CryptographicException e)
{
Console.WriteLine("A Cryptographic error occurred: {0}", e.Message);
return null;
}
catch (UnauthorizedAccessException e)
{
Console.WriteLine("A file error occurred: {0}", e.Message);
return null;
}
catch (Exception e)
{
Console.WriteLine("An error occurred: {0}", e.Message);
}
finally
{
rj.Clear();
}
return encrypted;
}
PHP
var $mcrypt_cipher = MCRYPT_RIJNDAEL_256;
var $mcrypt_mode = MCRYPT_MODE_CBC;
function decrypt($key, $iv, $encrypted)
{
$encrypted = base64_decode($encrypted);
$decrypted = rtrim(mcrypt_decrypt($this->mcrypt_cipher, $key, $encrypted, $this->mcrypt_mode, $iv), "\0");;
return $decrypted;
}
感谢
IV应该真的是随机的。如果不是这样的话,它就会失败。 – quantumSoup 2010-08-07 21:10:09
带有256位块的Rijndael是非标准的。 – kroiz 2014-12-16 08:22:16