public GPKeySet GetSessionKeys(int scp, byte[] kdd, params byte[][] args)
{
GPKeySet cardKeys = staticKeys;
if (diversifier != Diversification.NONE)
{
cardKeys = Diversify(staticKeys, kdd, diversifier, scp);
}
System.Diagnostics.Debug.WriteLine(String.Format("card manager keys are diversified from kmc: {0}", Formatting.ByteArrayToHexString(master.GetValue())));
System.Diagnostics.Debug.WriteLine(String.Format("diversified card keys: {0}", cardKeys.ToString()));
GPKeySet sessionKeys;
if (scp == 1)
{
if (args.Length != 2)
{
throw new Exception("SCP01 requires host challenge and card challenge");
}
sessionKeys = DeriveSessionKeysSCP01(cardKeys, args[0], args[1]);
}
else if (scp == 2)
{
if (args.Length != 1)
{
throw new Exception("SCP02 requires sequence");
}
sessionKeys = DeriveSessionKeysSCP02(cardKeys, args[0], false);
}
else if (scp == 3)
{
if (args.Length != 2)
{
throw new Exception("SCP03 requires host challenge and card challenge");
}
sessionKeys = DeriveSessionKeysSCP03(cardKeys, args[0], args[1]);
}
else
{
throw new Exception("Dont know how to handle: " + scp);
}
System.Diagnostics.Debug.WriteLine(String.Format("session keys: {0}", sessionKeys.ToString()));
return(sessionKeys);
}
private GPPlaintextKeys(GPKeySet keys, Diversification div)
{
staticKeys = keys;
diversifier = div;
System.Diagnostics.Debug.WriteLine(String.Format("static keys: {0}", staticKeys.ToString()));
}
