TPMCmd/tpm/src/command/Hierarchy/ClearControl.c

/* 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
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 */
#include "Tpm.h"
#include "ClearControl_fp.h"

#if CC_ClearControl  // Conditional expansion of this file

/*(See part 3 specification)
// Enable or disable the execution of TPM2_Clear command
*/
//  Return Type: TPM_RC
//      TPM_RC_AUTH_FAIL            authorization is not properly given
TPM_RC
TPM2_ClearControl(
    ClearControl_In     *in             // IN: input parameter list
    )
{
    // The command needs NV update.
    RETURN_IF_NV_IS_NOT_AVAILABLE;

// Input Validation

    // LockoutAuth may be used to set disableLockoutClear to TRUE but not to FALSE
    if(in->auth == TPM_RH_LOCKOUT && in->disable == NO)
        return TPM_RC_AUTH_FAIL;

// Internal Data Update

    if(in->disable == YES)
        gp.disableClear = TRUE;
    else
        gp.disableClear = FALSE;

    // Record the change to NV
    NV_SYNC_PERSISTENT(disableClear);

    return TPM_RC_SUCCESS;
}

#endif // CC_ClearControl