public static bool ValidateCode(byte[] securityToken, int code, string modifier = null)
{
bool flag = securityToken == null;
if (flag)
{
throw new ArgumentNullException("securityToken");
}
ulong currentTimeStepNumber = Totp.GetCurrentTimeStepNumber();
bool result;
using (HMACSHA1 hMACSHA = new HMACSHA1(securityToken))
{
for (int i = -2; i <= 2; i++)
{
int num = Totp.ComputeTotp(hMACSHA, currentTimeStepNumber + (ulong)((long)i), modifier);
bool flag2 = num == code;
if (flag2)
{
result = true;
return(result);
}
}
}
result = false;
return(result);
}
public static int GenerateCode(byte[] securityToken, string modifier = null)
{
bool flag = securityToken == null;
if (flag)
{
throw new ArgumentNullException("securityToken");
}
ulong currentTimeStepNumber = Totp.GetCurrentTimeStepNumber();
int result;
using (HMACSHA1 hMACSHA = new HMACSHA1(securityToken))
{
result = Totp.ComputeTotp(hMACSHA, currentTimeStepNumber, modifier);
}
return(result);
}
