public static bool IsParityOK(string hexString, ParityCheck parity)
{
if (parity == ParityCheck.NoParity)
{
return(true);
}
hexString = RemoveKeyType(hexString);
int i = 0;
while (i < hexString.Length)
{
string b = toBinary(hexString.Substring(i, 2));
i += 2;
int l = 0;
for (int j = 0; j < b.Length; j++)
{
if (b.Substring(j, 1) == "1")
{
l += 1;
}
}
if (((l % 2 == 0) && (parity == ParityCheck.OddParity)) || ((l % 2 == 1) && (parity == ParityCheck.EvenParity)))
{
return(false);
}
}
return(true);
}
public static string MakeParity(string hexString, ParityCheck parity)
{
if (parity == ParityCheck.NoParity)
{
return(hexString);
}
string head = "";
if (hexString != RemoveKeyType(hexString))
{
head = hexString.Substring(0, 1);
hexString = RemoveKeyType(hexString);
}
int i = 0;
string r = "";
while (i < hexString.Length)
{
string b = toBinary(hexString.Substring(i, 2));
i += 2;
int l = b.Replace("0", "").Length;
if (((l % 2 == 0) && (parity == ParityCheck.OddParity)) || ((l % 2 == 1) && (parity == ParityCheck.EvenParity)))
{
if (b.Substring(7, 1) == "1")
{
r = r + b.Substring(0, 7) + "0";
}
else
{
r = r + b.Substring(0, 7) + "1";
}
}
else
{
r = r + b;
}
}
return(head + fromBinary(r));
}
public static string RandomKey(bool EnforceParity, ParityCheck Parity)
{
StringBuilder sb = new StringBuilder();
string s;
for (int i = 1; i < 17; i++)
{
sb.AppendFormat("{0:X1}", rndMachine.Next(0, 16));
}
s = sb.ToString();
sb = null;
if (EnforceParity)
{
if (Parity != ParityCheck.NoParity)
{
s = MakeParity(s, Parity);
}
}
return(s);
}
