static bool GetOwnerAuthFromOS(out byte[] ownerAuth)
{
ownerAuth = new byte[0];
// open context
TbsWrapper.TBS_CONTEXT_PARAMS contextParams;
UIntPtr tbsContext = UIntPtr.Zero;
contextParams.Version = TbsWrapper.TBS_CONTEXT_VERSION.TWO;
contextParams.Flags = TbsWrapper.TBS_CONTEXT_CREATE_FLAGS.IncludeTpm20;
TbsWrapper.TBS_RESULT result = TbsWrapper.NativeMethods.Tbsi_Context_Create(ref contextParams, ref tbsContext);
if (result != TbsWrapper.TBS_RESULT.TBS_SUCCESS)
{
return(false);
}
if (tbsContext == UIntPtr.Zero)
{
return(false);
}
// get owner auth size
uint ownerAuthSize = 0;
TbsWrapper.TBS_OWNERAUTH_TYPE ownerType = TbsWrapper.TBS_OWNERAUTH_TYPE.TBS_OWNERAUTH_TYPE_STORAGE_20;
result = TbsWrapper.NativeMethods.Tbsi_Get_OwnerAuth(tbsContext, ownerType, ownerAuth, ref ownerAuthSize);
if (result != TbsWrapper.TBS_RESULT.TBS_SUCCESS &&
result != TbsWrapper.TBS_RESULT.TBS_E_INSUFFICIENT_BUFFER)
{
ownerType = TbsWrapper.TBS_OWNERAUTH_TYPE.TBS_OWNERAUTH_TYPE_FULL;
result = TbsWrapper.NativeMethods.Tbsi_Get_OwnerAuth(tbsContext, ownerType, ownerAuth, ref ownerAuthSize);
if (result != TbsWrapper.TBS_RESULT.TBS_SUCCESS &&
result != TbsWrapper.TBS_RESULT.TBS_E_INSUFFICIENT_BUFFER)
{
Console.WriteLine(Globs.GetResourceString("Failed to get ownerAuth."));
return(false);
}
}
// get owner auth itself
ownerAuth = new byte[ownerAuthSize];
result = TbsWrapper.NativeMethods.Tbsi_Get_OwnerAuth(tbsContext, ownerType, ownerAuth, ref ownerAuthSize);
if (result != TbsWrapper.TBS_RESULT.TBS_SUCCESS)
{
Console.WriteLine(Globs.GetResourceString("Failed to get ownerAuth."));
return(false);
}
TbsWrapper.NativeMethods.Tbsip_Context_Close(tbsContext);
return(true);
}