public static string ProtectData(string encryptKey, string validateKey, string clearData, string ivStr = null)
{
using (var rj = new RijndaelManaged())
{
rj.Padding = PaddingMode.PKCS7;
rj.Mode = CipherMode.CBC;
rj.KeySize = 256;// 128;
rj.BlockSize = 128;
rj.Key = CryptoExtensions.HexToBinary(encryptKey);
byte[] iv;
if (ivStr == null)
{
rj.GenerateIV();
iv = rj.IV;
}
else
{
iv = CryptoExtensions.HexToBinary(ivStr);
rj.IV = iv;
}
var data = Encoding.UTF8.GetBytes(clearData);
using (var memoryStream = new MemoryStream())
{
//先将向量写入加密流头部
memoryStream.Write(iv, 0, iv.Length);
using (var encryptor = rj.CreateEncryptor())
using (var cryptoStream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write))
{
//写入加密字节流
cryptoStream.Write(data, 0, data.Length);
cryptoStream.FlushFinalBlock();
//计算当前字节流的Hash值，并写入流末端
using (KeyedHashAlgorithm validationAlgorithm
= new HMACSHA256(CryptoExtensions.HexToBinary(validateKey)))
{
var hash = validationAlgorithm.ComputeHash(
memoryStream.GetBuffer(), 0, checked ((int)memoryStream.Length));
memoryStream.Write(hash, 0, 8);
return(CryptoExtensions.BinaryToHex(memoryStream.ToArray()));
}
}
}
}
}
static string GetMD5String(string original)
{
var encrypted = md5.ComputeHash(Encoding.ASCII.GetBytes(original));
return(CryptoExtensions.BinaryToHex(encrypted).ToLower());
}
