src/tpm2/AuditCommands.c - master - githubmirror/libtpms

src/tpm2/AuditCommands.c
111 строк5 KB
Stefan Berger
rev180: Sync comment and whitespace changes
27 фев 2024, 20:18
27 фев 2024, 20:185ad0256
/********************************************************************************/
/*										*/
/*			   	Command Audit  					*/
/*			     Written by Ken Goldman				*/
/*		       IBM Thomas J. Watson Research Center			*/
/*										*/
/*  Licenses and Notices							*/
/*										*/
/*  1. Copyright Licenses:							*/
/*										*/
/*  - Trusted Computing Group (TCG) grants to the user of the source code in	*/
/*    this specification (the "Source Code") a worldwide, irrevocable, 		*/
/*    nonexclusive, royalty free, copyright license to reproduce, create 	*/
/*    derivative works, distribute, display and perform the Source Code and	*/
/*    derivative works thereof, and to grant others the rights granted herein.	*/
/*										*/
/*  - The TCG grants to the user of the other parts of the specification 	*/
/*    (other than the Source Code) the rights to reproduce, distribute, 	*/
/*    display, and perform the specification solely for the purpose of 		*/
/*    developing products based on such documents.				*/
/*										*/
/*  2. Source Code Distribution Conditions:					*/
/*										*/
/*  - Redistributions of Source Code must retain the above copyright licenses, 	*/
/*    this list of conditions and the following disclaimers.			*/
/*										*/
/*  - Redistributions in binary form must reproduce the above copyright 	*/
/*    licenses, this list of conditions	and the following disclaimers in the 	*/
/*    documentation and/or other materials provided with the distribution.	*/
/*										*/
/*  3. Disclaimers:								*/
/*										*/
/*  - THE COPYRIGHT LICENSES SET FORTH ABOVE DO NOT REPRESENT ANY FORM OF	*/
/*  LICENSE OR WAIVER, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, WITH	*/
/*  RESPECT TO PATENT RIGHTS HELD BY TCG MEMBERS (OR OTHER THIRD PARTIES)	*/
/*  THAT MAY BE NECESSARY TO IMPLEMENT THIS SPECIFICATION OR OTHERWISE.		*/
/*  Contact TCG Administration (admin@trustedcomputinggroup.org) for 		*/
/*  information on specification licensing rights available through TCG 	*/
/*  membership agreements.							*/
/*										*/
/*  - THIS SPECIFICATION IS PROVIDED "AS IS" WITH NO EXPRESS OR IMPLIED 	*/
/*    WARRANTIES WHATSOEVER, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR 	*/
/*    FITNESS FOR A PARTICULAR PURPOSE, ACCURACY, COMPLETENESS, OR 		*/
/*    NONINFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS, OR ANY WARRANTY 		*/
/*    OTHERWISE ARISING OUT OF ANY PROPOSAL, SPECIFICATION OR SAMPLE.		*/
/*										*/
/*  - Without limitation, TCG and its members and licensors disclaim all 	*/
/*    liability, including liability for infringement of any proprietary 	*/
/*    rights, relating to use of information in this specification and to the	*/
/*    implementation of this specification, and TCG disclaims all liability for	*/
/*    cost of procurement of substitute goods or services, lost profits, loss 	*/
/*    of use, loss of data or any incidental, consequential, direct, indirect, 	*/
/*    or special damages, whether under contract, tort, warranty or otherwise, 	*/
/*    arising in any way out of use or reliance upon this specification or any 	*/
/*    information herein.							*/
/*										*/
/*  (c) Copyright IBM Corp. and others, 2016 - 2024				*/
/*										*/
/********************************************************************************/

#include "Tpm.h"
#include "SetCommandCodeAuditStatus_fp.h"
#if CC_SetCommandCodeAuditStatus  // Conditional expansion of this file
TPM_RC
TPM2_SetCommandCodeAuditStatus(
			       SetCommandCodeAuditStatus_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;
    // Internal Data Update
    // Update hash algorithm
    if(in->auditAlg != TPM_ALG_NULL && in->auditAlg != gp.auditHashAlg)
	{
	    // Can't change the algorithm and command list at the same time
	    if(in->setList.count != 0 || in->clearList.count != 0)
		return TPM_RCS_VALUE + RC_SetCommandCodeAuditStatus_auditAlg;
	    // Change the hash algorithm for audit
	    gp.auditHashAlg = in->auditAlg;
	    // Set the digest size to a unique value that indicates that the digest
	    // algorithm has been changed. The size will be cleared to zero in the
	    // command audit processing on exit.
	    gr.commandAuditDigest.t.size = 1;
	    // Save the change of command audit data (this sets g_updateNV so that NV
	    // will be updated on exit.)
	    NV_SYNC_PERSISTENT(auditHashAlg);
	}
    else
	{
	    UINT32          i;
	    BOOL            changed = FALSE;
	    // Process set list
	    for(i = 0; i < in->setList.count; i++)
		// If change is made in CommandAuditSet, set changed flag
		if(CommandAuditSet(in->setList.commandCodes[i]))
		    changed = TRUE;
	    // Process clear list
	    for(i = 0; i < in->clearList.count; i++)
		// If change is made in CommandAuditClear, set changed flag
		if(CommandAuditClear(in->clearList.commandCodes[i]))
		    changed = TRUE;
	    // if change was made to command list, update NV
	    if(changed)
		// this sets g_updateNV so that NV will be updated on exit.
		NV_SYNC_PERSISTENT(auditCommands);
	}
    return TPM_RC_SUCCESS;
}
#endif // CC_SetCommandCodeAuditStatus