mirror of https://github.com/wolfSSL/wolfTPM.git
147 lines
4.3 KiB
C
147 lines
4.3 KiB
C
/* clockSet.c
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*
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* Copyright (C) 2006-2020 wolfSSL Inc.
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*
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* This file is part of wolfTPM.
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*
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* wolfTPM is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* wolfTPM is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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/* This example shows how to increment the TPM2 clock */
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#include <wolftpm/tpm2_wrap.h>
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#ifndef WOLFTPM2_NO_WRAPPER
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#include <examples/clock/clockSet.h>
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#include <examples/tpm_io.h>
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#include <examples/tpm_test.h>
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#include <stdio.h>
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/******************************************************************************/
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/* --- BEGIN TPM clockSet Test -- */
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/******************************************************************************/
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int TPM2_ClockSet_Test(void* userCtx)
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{
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int rc;
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WOLFTPM2_DEV dev;
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union {
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ClockSet_In clockSet;
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byte maxInput[MAX_COMMAND_SIZE];
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} cmdIn;
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union {
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ReadClock_Out readClock;
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byte maxOutput[MAX_RESPONSE_SIZE];
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} cmdOut;
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TPMS_AUTH_COMMAND session[MAX_SESSION_NUM];
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UINT64 oldClock, newClock;
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printf("TPM2 Demo of setting the TPM clock forward\n");
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rc = wolfTPM2_Init(&dev, TPM2_IoCb, userCtx);
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if (rc != TPM_RC_SUCCESS) {
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printf("wolfTPM2_Init failed 0x%x: %s\n", rc, TPM2_GetRCString(rc));
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goto exit;
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}
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printf("wolfTPM2_Init: success\n");
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/* Define the default session auth that has NULL password */
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XMEMSET(session, 0, sizeof(session));
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session[0].sessionHandle = TPM_RS_PW;
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session[0].auth.size = 0; /* NULL Password */
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TPM2_SetSessionAuth(session);
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/* ReadClock the current TPM uptime */
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XMEMSET(&cmdOut.readClock, 0, sizeof(cmdOut.readClock));
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rc = TPM2_ReadClock(&cmdOut.readClock);
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if (rc != TPM_RC_SUCCESS) {
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printf("TPM2_ReadClock failed 0x%x: %s\n", rc,
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TPM2_GetRCString(rc));
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goto exit;
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}
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printf("TPM2_ReadClock: success\n");
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printf("TPM2_ReadClock: (total) time=%lu\n",
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cmdOut.readClock.currentTime.time);
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printf("TPM2_ReadClock: (uptime) clock=%lu\n",
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cmdOut.readClock.currentTime.clockInfo.clock);
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oldClock = cmdOut.readClock.currentTime.clockInfo.clock;
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/* Set Clock forward by 50 seconds */
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cmdIn.clockSet.auth = TPM_RH_OWNER;
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cmdIn.clockSet.newTime = oldClock + 50000;
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rc = TPM2_ClockSet(&cmdIn.clockSet);
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if (rc != TPM_RC_SUCCESS) {
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printf("TPM2_clockSet failed 0x%x: %s\n", rc,
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TPM2_GetRCString(rc));
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goto exit;
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}
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printf("TPM2_clockSet: success\n");
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/* ReadClock to check the new clock time is set */
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XMEMSET(&cmdOut.readClock, 0, sizeof(cmdOut.readClock));
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rc = TPM2_ReadClock(&cmdOut.readClock);
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if (rc != TPM_RC_SUCCESS) {
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printf("TPM2_ReadClock failed 0x%x: %s\n", rc,
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TPM2_GetRCString(rc));
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goto exit;
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}
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printf("TPM2_ReadClock: success\n");
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printf("TPM2_ReadClock: (total) time=%lu\n",
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cmdOut.readClock.currentTime.time);
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printf("TPM2_ReadClock: (uptime) clock=%lu\n",
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cmdOut.readClock.currentTime.clockInfo.clock);
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newClock = cmdOut.readClock.currentTime.clockInfo.clock;
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printf("\n\t oldClock=%lu \n\t newClock=%lu \n\n", oldClock, newClock);
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exit:
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if (rc != 0) {
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printf("Failure 0x%x: %s\n", rc, wolfTPM2_GetRCString(rc));
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}
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wolfTPM2_Cleanup(&dev);
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return rc;
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}
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/******************************************************************************/
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/* --- END TPM Timestamp Test -- */
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/******************************************************************************/
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#endif /* !WOLFTPM2_NO_WRAPPER */
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#ifndef NO_MAIN_DRIVER
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int main(void)
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{
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int rc = -1;
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#ifndef WOLFTPM2_NO_WRAPPER
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rc = TPM2_ClockSet_Test(NULL);
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#else
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printf("Wrapper code not compiled in\n");
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#endif /* !WOLFTPM2_NO_WRAPPER */
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return rc;
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}
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#endif
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