/// <summary>
/// This sample illustrates the use of the resource manager built into
/// Tpm2Lib. Using the resource manager relieves the programmer of the
/// (sometimes burdensome) chore of juggling a small number of TPM slots
/// </summary>
/// <param name="tpm">Reference to the TPM object.</param>
static void ResourceManager(Tpm2 tpm)
{
//
// The Tbs device class has a built-in resource manager. We create an
// instance of the Tbs device class, but hook it up to the TCP device
// created above. We also tell the Tbs device class to clean the TPM
// before we start using it.
// This sample won't work on top of the default Windows resource manager
// (TBS).
//
var tbs = new Tbs(tpm._GetUnderlyingDevice(), false);
var tbsTpm = new Tpm2(tbs.CreateTbsContext());
//
// Make more sessions than the TPM has room for
//
const int count = 32;
var sessions = new AuthSession[count];
for (int j = 0; j < count; j++)
{
sessions[j] = tbsTpm.StartAuthSessionEx(TpmSe.Policy, TpmAlgId.Sha1);
}
Console.WriteLine("Created {0} sessions.", count);
//
// And now use them. The resource manager will use ContextLoad and
// ContextSave to bring them into the TPM
//
for (int j = 0; j < count; j++)
{
tbsTpm.PolicyAuthValue(sessions[j].Handle);
}
Console.WriteLine("Used {0} sessions.", count);
//
// And now clean up
//
for (int j = 0; j < count; j++)
{
tbsTpm.FlushContext(sessions[j].Handle);
}
Console.WriteLine("Cleaned up.");
//
// Dispose of the Tbs device object.
//
tbsTpm.Dispose();
}
