public virtual string CreateHashKey()
{
string arg = "Nexon.Com.Encryption.RSAWrapper";
DateTime now = DateTime.Now;
DateTime dateTime = new DateTime(now.Year, now.Month, now.Day, now.Hour, now.Minute / 10 * 10, 0);
string text = HttpRuntime.Cache[string.Format("{0}:{1}", arg, dateTime.ToString("yyyyMMddHHmmss"))] as string;
if (text == null)
{
string text2 = dateTime.AddMinutes(-10.0).ToString("yyyyMMddHHmmss");
string text3 = dateTime.ToString("yyyyMMddHHmmss");
string text4 = dateTime.AddMinutes(10.0).ToString("yyyyMMddHHmmss");
byte[] bytes = Encoding.Default.GetBytes(text2);
byte[] bytes2 = Encoding.Default.GetBytes(text3);
byte[] bytes3 = Encoding.Default.GetBytes(text4);
string value = RSACore.ComputeHashString(bytes);
string text5 = RSACore.ComputeHashString(bytes2);
string value2 = RSACore.ComputeHashString(bytes3);
HttpRuntime.Cache.Insert(string.Format("{0}:{1}", arg, text2), value, null, now.AddMinutes(10.0), Cache.NoSlidingExpiration);
HttpRuntime.Cache.Insert(string.Format("{0}:{1}", arg, text3), text5, null, now.AddMinutes(10.0), Cache.NoSlidingExpiration);
HttpRuntime.Cache.Insert(string.Format("{0}:{1}", arg, text4), value2, null, now.AddMinutes(10.0), Cache.NoSlidingExpiration);
return(text5);
}
return(text);
}
public virtual bool CheckHashKey(string hash)
{
string arg = "Nexon.Com.Encryption.RSAWrapper";
DateTime now = DateTime.Now;
DateTime dateTime = new DateTime(now.Year, now.Month, now.Day, now.Hour, now.Minute / 10 * 10, 0);
string text = dateTime.AddMinutes(-10.0).ToString("yyyyMMddHHmmss");
string text2 = dateTime.ToString("yyyyMMddHHmmss");
string text3 = dateTime.AddMinutes(10.0).ToString("yyyyMMddHHmmss");
string text4 = HttpRuntime.Cache[string.Format("{0}:{1}", arg, text2)] as string;
if (text4 != null && text4 == hash)
{
return(true);
}
text4 = (HttpRuntime.Cache[string.Format("{0}:{1}", arg, text)] as string);
if (text4 != null && text4 == hash)
{
return(true);
}
text4 = (HttpRuntime.Cache[string.Format("{0}:{1}", arg, text3)] as string);
if (text4 != null && text4 == hash)
{
return(true);
}
byte[] bytes = Encoding.Default.GetBytes(text);
byte[] bytes2 = Encoding.Default.GetBytes(text2);
byte[] bytes3 = Encoding.Default.GetBytes(text3);
string text5 = RSACore.ComputeHashString(bytes);
string text6 = RSACore.ComputeHashString(bytes2);
string text7 = RSACore.ComputeHashString(bytes3);
HttpRuntime.Cache.Insert(string.Format("{0}:{1}", arg, text), text5, null, now.AddMinutes(10.0), Cache.NoSlidingExpiration);
HttpRuntime.Cache.Insert(string.Format("{0}:{1}", arg, text2), text6, null, now.AddMinutes(10.0), Cache.NoSlidingExpiration);
HttpRuntime.Cache.Insert(string.Format("{0}:{1}", arg, text3), text7, null, now.AddMinutes(10.0), Cache.NoSlidingExpiration);
return(hash == text6 || hash == text5 || hash == text7);
}
public string[] Decrypt(string data, bool checkHash)
{
string text = string.Empty;
string text2 = string.Empty;
string[] result;
try
{
try
{
StringBuilder stringBuilder = new StringBuilder(256);
string[] array = data.Split(new char[]
{
' '
});
for (int i = 0; i < array.Length; i++)
{
stringBuilder.Append(RSACore.Decrypt(array[i]));
}
text = stringBuilder.ToString();
}
catch (Exception ex)
{
throw new Exception(string.Format("decrypt failed ({0})", ex.Message));
}
string[] array2 = text.Split(new char[]
{
'\\'
});
string[] array3;
if (checkHash)
{
if (array2.Length < 2)
{
throw new Exception("hash key invalid");
}
text2 = array2[0];
array3 = new string[array2.Length - 1];
if (this.CheckHashKey(text2))
{
for (int j = 0; j < array2.Length - 1; j++)
{
array3[j] = this.Convert(array2[j + 1]);
}
}
else
{
for (int k = 0; k < array2.Length - 1; k++)
{
array3[k] = string.Empty;
}
}
}
else
{
array3 = new string[array2.Length];
for (int l = 0; l < array2.Length; l++)
{
array3[l] = this.Convert(array2[l]);
}
}
result = array3;
}
catch (Exception ex2)
{
int num;
DateTime dateTime;
ErrorLog.CreateErrorLog(ServiceCode.framework, 70000, null, string.Format("RSAWrapper : {0}", ex2.Message), string.Format("Message={0} & ClientIP={1} & EncData={2} & HashKey={3} & StackTrace={4}", new object[]
{
ex2.Message,
(HttpContext.Current != null) ? HttpContext.Current.Request.UserHostAddress : string.Empty,
data,
text2,
ex2.StackTrace
}), out num, out dateTime);
throw ex2;
}
return(result);
}
public string GetModulus()
{
return(RSACore.GetModulus());
}
public string GetEncryptExponent()
{
return(RSACore.GetEncryptExponent());
}
public static void Release()
{
RSACore.Release();
}
public string Convert(string data)
{
return(RSACore.ConvertUTF8(data));
}
public static void Init()
{
RSACore.Init();
}