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/********************************************************************************/
/* */
/* Libtpms Callbacks */
/* Written by Stefan Berger */
/* IBM Thomas J. Watson Research Center */
/* */
/* (c) Copyright IBM Corporation 2018. */
/* */
/* All rights reserved. */
/* */
/* 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. */
/* */
/* Neither the names of the IBM Corporation nor the names of its */
/* contributors may be used to endorse or promote products derived from */
/* this software without specific prior written permission. */
/* */
/* 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 <stdint.h>
#include <string.h>
#include "Platform.h"
#include "LibtpmsCallbacks.h"
#include "NVMarshal.h"
#define TPM_HAVE_TPM2_DECLARATIONS
#include "tpm_library_intern.h"
#include "tpm_error.h"
#include "tpm_nvfilename.h"
int
libtpms_plat__NVEnable(void)
{
unsigned char *data = NULL;
uint32_t length = 0;
struct libtpms_callbacks *cbs = TPMLIB_GetCallbacks();
TPM_RC rc;
bool is_empty_state;
/* try to get state blob set via TPMLIB_SetState() */
GetCachedState(TPMLIB_STATE_PERMANENT, &data, &length, &is_empty_state);
if (is_empty_state) {
memset(s_NV, 0, NV_MEMORY_SIZE);
return 0;
}
if (data == NULL && cbs->tpm_nvram_loaddata) {
uint32_t tpm_number = 0;
const char *name = TPM_PERMANENT_ALL_NAME;
TPM_RESULT ret;
ret = cbs->tpm_nvram_loaddata(&data, &length, tpm_number, name);
switch (ret) {
case TPM_RETRY:
if (!cbs->tpm_nvram_storedata) {
return -1;
}
memset(s_NV, 0, NV_MEMORY_SIZE);
return 0;
case TPM_SUCCESS:
/* got the data -- unmarshal them... */
break;
case TPM_FAIL:
default:
return -1;
}
}
if (data) {
unsigned char *buffer = data;
INT32 size = length;
rc = PERSISTENT_ALL_Unmarshal(&buffer, &size);
free(data);
if (rc != TPM_RC_SUCCESS)
return -1;
return 0;
}
return LIBTPMS_CALLBACK_FALLTHROUGH; /* -2 */
}
int
libtpms_plat__NVDisable(
void
)
{
struct libtpms_callbacks *cbs = TPMLIB_GetCallbacks();
if (cbs->tpm_nvram_loaddata)
return 0;
return LIBTPMS_CALLBACK_FALLTHROUGH; /* -2 */
}
int
libtpms_plat__IsNvAvailable(
void
)
{
struct libtpms_callbacks *cbs = TPMLIB_GetCallbacks();
if (cbs->tpm_nvram_loaddata &&
cbs->tpm_nvram_storedata) {
return 1;
}
return LIBTPMS_CALLBACK_FALLTHROUGH; /* -2 */
}
int
libtpms_plat__NvCommit(
void
)
{
struct libtpms_callbacks *cbs = TPMLIB_GetCallbacks();
if (cbs->tpm_nvram_storedata) {
uint32_t tpm_number = 0;
const char *name = TPM_PERMANENT_ALL_NAME;
TPM_RESULT ret;
BYTE *buf;
uint32_t buflen;
ret = TPM2_PersistentAllStore(&buf, &buflen);
if (ret != TPM_SUCCESS)
return ret;
ret = cbs->tpm_nvram_storedata(buf, buflen,
tpm_number, name);
free(buf);
if (ret == TPM_SUCCESS)
return 0;
return -1;
}
return LIBTPMS_CALLBACK_FALLTHROUGH; /* -2 */
}
int
libtpms_plat__PhysicalPresenceAsserted(
BOOL *pp
)
{
struct libtpms_callbacks *cbs = TPMLIB_GetCallbacks();
if (cbs->tpm_io_getphysicalpresence) {
uint32_t tpm_number = 0;
TPM_RESULT res;
unsigned char mypp;
res = cbs->tpm_io_getphysicalpresence(&mypp, tpm_number);
if (res == TPM_SUCCESS) {
*pp = mypp;
return 0;
}
}
return LIBTPMS_CALLBACK_FALLTHROUGH;
}
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