/* Microsoft Reference Implementation for TPM 2.0
 *
 *  The copyright in this software is being made available under the BSD License,
 *  included below. This software may be subject to other third party and
 *  contributor rights, including patent rights, and no such rights are granted
 *  under this license.
 *
 *  Copyright (c) Microsoft Corporation
 *
 *  All rights reserved.
 *
 *  BSD License
 *
 *  Redistribution and use in source and binary forms, with or without modification,
 *  are permitted provided that the following conditions are met:
 *
 *  Redistributions of source code must retain the above copyright notice, this list
 *  of conditions and the following disclaimer.
 *
 *  Redistributions in binary form must reproduce the above copyright notice, this
 *  list of conditions and the following disclaimer in the documentation and/or
 *  other materials provided with the distribution.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ""AS IS""
 *  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 *  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 *  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
 *  ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 *  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 *  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 *  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#include "Tpm.h"
#include "Shutdown_fp.h"

#if CC_Shutdown  // Conditional expansion of this file

/*(See part 3 specification)
// Shut down TPM for power off
*/
//  Return Type: TPM_RC
//      TPM_RC_TYPE             if PCR bank has been re-configured, a
//                              Shutdown(CLEAR) is required
TPM_RC
TPM2_Shutdown(
    Shutdown_In     *in             // IN: input parameter list
    )
{
    // The command needs NV update.  Check if NV is available.
    // A TPM_RC_NV_UNAVAILABLE or TPM_RC_NV_RATE error may be returned at
    // this point
    RETURN_IF_NV_IS_NOT_AVAILABLE;

// Input Validation
    // If PCR bank has been reconfigured, a CLEAR state save is required
    if(g_pcrReConfig && in->shutdownType == TPM_SU_STATE)
        return TPM_RCS_TYPE + RC_Shutdown_shutdownType;
// Internal Data Update
    gp.orderlyState = in->shutdownType;

#if USE_DA_USED
    // CLEAR g_daUsed so that any future DA-protected access will cause the
    // shutdown to become non-orderly. It is not sufficient to invalidate the
    // shutdown state after a DA failure because an attacker can inhibit access
    // to NV and use the fact that an update of ‘failedTries’ was attempted as an
    // indication of an authorization failure. By making sure that the orderly state
    // is CLEAR before any DA attempt, this prevents the possibility of this 'attack.'
    g_daUsed = FALSE;
#endif

    // PCR private date state save
    PCRStateSave(in->shutdownType);

    // Save the ACT state
    ActShutdown(in->shutdownType);

    // Save RAM backed NV index data
    NvUpdateIndexOrderlyData();

#if ACCUMULATE_SELF_HEAL_TIMER
    // Save the current time value
    go.time = g_time;
#endif

    // Save all orderly data
    NvWrite(NV_ORDERLY_DATA, sizeof(ORDERLY_DATA), &go);

    if(in->shutdownType == TPM_SU_STATE)
    {
        // Save STATE_RESET and STATE_CLEAR data
        NvWrite(NV_STATE_CLEAR_DATA, sizeof(STATE_CLEAR_DATA), &gc);
        NvWrite(NV_STATE_RESET_DATA, sizeof(STATE_RESET_DATA), &gr);

        // Save the startup flags for resume
        if(g_DrtmPreStartup)
            gp.orderlyState = TPM_SU_STATE | PRE_STARTUP_FLAG;
        else if(g_StartupLocality3)
            gp.orderlyState = TPM_SU_STATE | STARTUP_LOCALITY_3;
    }
    // only two shutdown options.
    else if(in->shutdownType != TPM_SU_CLEAR)
        return TPM_RCS_VALUE + RC_Shutdown_shutdownType;

    NV_SYNC_PERSISTENT(orderlyState);

    return TPM_RC_SUCCESS;
}
#endif // CC_Shutdown