protected override bool ReleaseHandle()
{
SecurityStatus status = CredentialNativeMethods.FreeCredentialsHandle(
ref base.rawHandle
);
base.ReleaseHandle();
return(status == SecurityStatus.OK);
}
private void Init(CredentialUse use)
{
string packageName;
TimeStamp rawExpiry = new TimeStamp();
SecurityStatus status = SecurityStatus.InternalError;
// -- Package --
// Copy off for the call, since this.SecurityPackage is a property.
packageName = this.SecurityPackage;
this.Handle = new SafeCredentialHandle();
// The finally clause is the actual constrained region. The VM pre-allocates any stack space,
// performs any allocations it needs to prepare methods for execution, and postpones any
// instances of the 'uncatchable' exceptions (ThreadAbort, StackOverflow, OutOfMemory).
RuntimeHelpers.PrepareConstrainedRegions();
try { }
finally
{
status = CredentialNativeMethods.AcquireCredentialsHandle(
null,
packageName,
use,
IntPtr.Zero,
IntPtr.Zero,
IntPtr.Zero,
IntPtr.Zero,
ref this.Handle.rawHandle,
ref rawExpiry
);
}
if (status != SecurityStatus.OK)
{
SSPIException exc = new SSPIException("Failed to call AcquireCredentialHandle", status);
throw new SecurityException(ErrorHandling.ErrorCodes.Security.SSPI_ERROR, new string[] { exc.Message });
}
this.Expiry = rawExpiry.ToDateTime();
}
