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/********************************************************************************/
/* */
/* */
/* Written by Ken Goldman */
/* IBM Thomas J. Watson Research Center */
/* $Id: NV_spt.c 1490 2019-07-26 21:13:22Z kgoldman $ */
/* */
/* 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, 2017 */
/* */
/********************************************************************************/
/* 7.5 NV Command Support (NV_spt.c) */
/* 7.5.1 Includes */
#include "Tpm.h"
#include "NV_spt_fp.h"
/* 7.5.2 Functions */
/* 7.5.2.1 NvReadAccessChecks() */
/* Common routine for validating a read Used by TPM2_NV_Read(), TPM2_NV_ReadLock() and
TPM2_PolicyNV() */
/* Error Returns Meaning */
/* TPM_RC_NV_AUTHORIZATION autHandle is not allowed to authorize read of the index */
/* TPM_RC_NV_LOCKED Read locked */
/* TPM_RC_NV_UNINITIALIZED Try to read an uninitialized index */
TPM_RC
NvReadAccessChecks(
TPM_HANDLE authHandle, // IN: the handle that provided the
// authorization
TPM_HANDLE nvHandle, // IN: the handle of the NV index to be read
TPMA_NV attributes // IN: the attributes of 'nvHandle'
)
{
// If data is read locked, returns an error
if(IS_ATTRIBUTE(attributes, TPMA_NV, READLOCKED))
return TPM_RC_NV_LOCKED;
// If the authorization was provided by the owner or platform, then check
// that the attributes allow the read. If the authorization handle
// is the same as the index, then the checks were made when the authorization
// was checked..
if(authHandle == TPM_RH_OWNER)
{
// If Owner provided authorization then ONWERWRITE must be SET
if(!IS_ATTRIBUTE(attributes, TPMA_NV, OWNERREAD))
return TPM_RC_NV_AUTHORIZATION;
}
else if(authHandle == TPM_RH_PLATFORM)
{
// If Platform provided authorization then PPWRITE must be SET
if(!IS_ATTRIBUTE(attributes, TPMA_NV, PPREAD))
return TPM_RC_NV_AUTHORIZATION;
}
// If neither Owner nor Platform provided authorization, make sure that it was
// provided by this index.
else if(authHandle != nvHandle)
return TPM_RC_NV_AUTHORIZATION;
// If the index has not been written, then the value cannot be read
// NOTE: This has to come after other access checks to make sure that
// the proper authorization is given to TPM2_NV_ReadLock()
if(!IS_ATTRIBUTE(attributes, TPMA_NV, WRITTEN))
return TPM_RC_NV_UNINITIALIZED;
return TPM_RC_SUCCESS;
}
/* 7.5.2.2 NvWriteAccessChecks() */
/* Common routine for validating a write Used by TPM2_NV_Write(), TPM2_NV_Increment(),
TPM2_SetBits(), and TPM2_NV_WriteLock() */
/* Error Returns Meaning */
/* TPM_RC_NV_AUTHORIZATION Authorization fails */
/* TPM_RC_NV_LOCKED Write locked */
TPM_RC
NvWriteAccessChecks(
TPM_HANDLE authHandle, // IN: the handle that provided the
// authorization
TPM_HANDLE nvHandle, // IN: the handle of the NV index to be written
TPMA_NV attributes // IN: the attributes of 'nvHandle'
)
{
// If data is write locked, returns an error
if(IS_ATTRIBUTE(attributes, TPMA_NV, WRITELOCKED))
return TPM_RC_NV_LOCKED;
// If the authorization was provided by the owner or platform, then check
// that the attributes allow the write. If the authorization handle
// is the same as the index, then the checks were made when the authorization
// was checked..
if(authHandle == TPM_RH_OWNER)
{
// If Owner provided authorization then ONWERWRITE must be SET
if(!IS_ATTRIBUTE(attributes, TPMA_NV, OWNERWRITE))
return TPM_RC_NV_AUTHORIZATION;
}
else if(authHandle == TPM_RH_PLATFORM)
{
// If Platform provided authorization then PPWRITE must be SET
if(!IS_ATTRIBUTE(attributes, TPMA_NV, PPWRITE))
return TPM_RC_NV_AUTHORIZATION;
}
// If neither Owner nor Platform provided authorization, make sure that it was
// provided by this index.
else if(authHandle != nvHandle)
return TPM_RC_NV_AUTHORIZATION;
return TPM_RC_SUCCESS;
}
/* 7.5.2.3 NvClearOrderly() */
/* This function is used to cause gp.orderlyState to be cleared to the non-orderly state. */
TPM_RC
NvClearOrderly(
void
)
{
if(gp.orderlyState < SU_DA_USED_VALUE)
RETURN_IF_NV_IS_NOT_AVAILABLE;
g_clearOrderly = TRUE;
return TPM_RC_SUCCESS;
}
/* 7.5.2.4 NvIsPinPassIndex() */
/* Function to check to see if an NV index is a PIN Pass Index */
/* Return Value Meaning */
/* TRUE is pin pass */
/* FALSE is not pin pass */
BOOL
NvIsPinPassIndex(
TPM_HANDLE index // IN: Handle to check
)
{
if(HandleGetType(index) == TPM_HT_NV_INDEX)
{
NV_INDEX *nvIndex = NvGetIndexInfo(index, NULL);
return IsNvPinPassIndex(nvIndex->publicArea.attributes);
}
return FALSE;
}
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