public static byte[] DecodeWithGzip(string source, string key, int expiry)
{
bool flag = source == null || key == null;
byte[] result;
if (flag)
{
result = null;
}
else
{
int num = 0;
key = AuthCode.MD5(key);
string str = AuthCode.MD5(AuthCode.CutString(key, 16, 16));
string text = AuthCode.MD5(AuthCode.CutString(key, 0, 16));
string str2 = (num > 0) ? AuthCode.CutString(source, 0, num) : "";
string pass = str + AuthCode.MD5(str + str2);
byte[] input;
try
{
input = Convert.FromBase64String(AuthCode.CutString(source, num));
}
catch
{
try
{
input = Convert.FromBase64String(AuthCode.CutString(source + "=", num));
}
catch
{
try
{
input = Convert.FromBase64String(AuthCode.CutString(source + "==", num));
}
catch
{
result = null;
return(result);
}
}
}
byte[] array = AuthCode.RC4(input, pass);
string @string = AuthCode.encoding.GetString(array);
long num2 = long.Parse(AuthCode.CutString(@string, 0, 10));
byte[] array2 = new byte[array.Length - 26];
Array.Copy(array, 26, array2, 0, array.Length - 26);
byte[] array3 = new byte[array.Length - 26 + text.Length];
Array.Copy(array2, 0, array3, 0, array2.Length);
Array.Copy(AuthCode.encoding.GetBytes(text), 0, array3, array2.Length, text.Length);
bool flag2 = (num2 == 0L || num2 - (long)AuthCode.GetCurrentTimeStamp() > 0L) && AuthCode.CutString(@string, 10, 16) == AuthCode.CutString(AuthCode.MD5(array3), 0, 16);
if (flag2)
{
result = array2;
}
else
{
result = null;
}
}
return(result);
}
private static string Authcode(string source, string key, AuthCode.AuthcodeMode operation, int expiry)
{
bool flag = source == null || key == null;
string result;
if (flag)
{
result = "";
}
else
{
int num = 0;
key = AuthCode.MD5(key);
string str = AuthCode.MD5(AuthCode.CutString(key, 16, 16));
string str2 = AuthCode.MD5(AuthCode.CutString(key, 0, 16));
string text = (num > 0) ? ((operation == AuthCode.AuthcodeMode.Decode) ? AuthCode.CutString(source, 0, num) : AuthCode.RandomString(num)) : "";
string pass = str + AuthCode.MD5(str + text);
bool flag2 = operation == AuthCode.AuthcodeMode.Decode;
if (flag2)
{
byte[] input;
try
{
input = Convert.FromBase64String(AuthCode.CutString(source, num));
}
catch
{
try
{
input = Convert.FromBase64String(AuthCode.CutString(source + "=", num));
}
catch
{
try
{
input = Convert.FromBase64String(AuthCode.CutString(source + "==", num));
}
catch
{
result = "";
return(result);
}
}
}
string @string = AuthCode.encoding.GetString(AuthCode.RC4(input, pass));
long num2 = long.Parse(AuthCode.CutString(@string, 0, 10));
bool flag3 = (num2 == 0L || num2 - (long)AuthCode.GetCurrentTimeStamp() > 0L) && AuthCode.CutString(@string, 10, 16) == AuthCode.CutString(AuthCode.MD5(AuthCode.CutString(@string, 26) + str2), 0, 16);
if (flag3)
{
result = AuthCode.CutString(@string, 26);
}
else
{
result = "";
}
}
else
{
source = ((expiry == 0) ? "0000000000" : (expiry + AuthCode.GetCurrentTimeStamp()).ToString()) + AuthCode.CutString(AuthCode.MD5(source + str2), 0, 16) + source;
byte[] inArray = AuthCode.RC4(AuthCode.encoding.GetBytes(source), pass);
result = text + Convert.ToBase64String(inArray);
}
}
return(result);
}