public static byte[] DecryptAes(this byte[] @this)
{
var data = @this.FastClone();
using (var aes = new RijndaelManaged())
{
aes.Mode = CipherMode.CFB;
aes.Padding = PaddingMode.None;
aes.KeySize = 192;
aes.BlockSize = 128;
aes.GenerateKeys(data.Length);
var blockSize = aes.BlockSize / 8;
var needChange = data.Length % blockSize != 0;
var diff = blockSize - data.Length % blockSize;
if (needChange)
{
Array.Resize(ref data, data.Length + diff);
}
data = aes.Decrypt(data);
if (needChange)
{
Array.Resize(ref data, data.Length - diff);
}
return(data);
}
}
/// <summary>
/// 解密
/// </summary>
/// <param name="str">要解密的 string 字符串</param>
/// <param name="key"></param>
/// <returns></returns>
public static string Decrypt(this RijndaelManaged manager, string str, Encoding encoding = null)
{
byte[] stringArray = Convert.FromBase64String(str);
byte[] result = manager.Decrypt(stringArray);
return((encoding ?? DefaultEncoding).GetString(result));
}
public void TestRijndaelAlgorithm()
{
var provider = new RijndaelManaged();
provider.Key = new Byte[] { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F };
provider.IV = new Byte[] { 0x0F, 0x0E, 0x0D, 0x0C, 0x0B, 0x0A, 0x09, 0x08, 0x07, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x00 };
provider.Padding = PaddingMode.Zeros;
provider.Mode = CipherMode.CBC;
var encodedData = provider.Encrypt(_clearData);
var decodedData = provider.Decrypt(encodedData);
CollectionAssert.AreEqual(_clearData, decodedData);
}
public static byte[] DecryptAES(byte[] data)
{
using (var aes = new RijndaelManaged())
{
aes.Mode = CipherMode.CFB;
aes.Padding = PaddingMode.Zeros;
aes.KeySize = 192;
aes.BlockSize = 128;
aes.GenerateKeys(data.Length);
Array.Resize(ref data, data.Length + 16 - data.Length % 16);
return(aes.Decrypt(data));
}
}