/// <summary>
/// 解密正文并返回
/// </summary>
/// <param name="intType">int32的 加密类型</param>
/// <param name="aesKeyDynamic">动态加密</param>
/// <param name="ms">内存协议流</param>
/// <returns></returns>
private static byte[] InternalDecryptReturnContent(int intType, string aesKeyDynamic, MemoryStream ms)
{
//当前位置
int currPos = (int)ms.Position;
int encTextCount = (int)ms.Length - currPos;
byte[] retBytes = new byte[encTextCount];
ms.Read(retBytes, 0, retBytes.Length);
int currType = 1;
EncryptType state;
//这里的8是因为当前最大类别就是8
while (currType <= 8)
{
if ((currType & intType) != 0)
{
state = (EncryptType)currType;
switch (state)
{
case EncryptType.AES:
retBytes = Cipher_Aes.DecryptToBytes(retBytes, aesKeyDynamic);
break;
case EncryptType.Gzip:
retBytes = Cipher_Gzip.Decompress(retBytes);
break;
//纯文本，不需要解密
case EncryptType.PT:
break;
//最早判断，已经读取过了
case EncryptType.ResetKey:
break;
}
}
currType = currType << 1;
}
return(retBytes);
}
public static string DeGzip(this string input) => Encoding.UTF8.GetString(Cipher_Gzip.Decompress(Convert.FromBase64String(input)));
