Add TPM clock increment example

Signed-off-by: Dimitar Tomov <dimi@designfirst.ee>

.gitignore

@@ -37,6 +37,7 @@ examples/timestamp/signed_timestamp
 examples/pcr/quote
 examples/pcr/extend
 examples/pcr/reset
+examples/clock/clockSet
 pkcs7tpmsigned.p7s
 pkcs7tpmsignedex.p7s
 examples/tls/tls_server

examples/clock/clockSet.c

@@ -0,0 +1,146 @@
+/* clockSet.c
+ *
+ * Copyright (C) 2006-2020 wolfSSL Inc.
+ *
+ * This file is part of wolfTPM.
+ *
+ * wolfTPM is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * wolfTPM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+/* This example shows how to increment the TPM2 clock */
+
+#include <wolftpm/tpm2_wrap.h>
+
+#ifndef WOLFTPM2_NO_WRAPPER
+
+#include <examples/clock/clockSet.h>
+#include <examples/tpm_io.h>
+#include <examples/tpm_test.h>
+
+#include <stdio.h>
+
+
+/******************************************************************************/
+/* --- BEGIN TPM clockSet Test -- */
+/******************************************************************************/
+
+int TPM2_ClockSet_Test(void* userCtx)
+{
+    int rc;
+    WOLFTPM2_DEV dev;
+
+    union {
+        ClockSet_In clockSet;
+        byte maxInput[MAX_COMMAND_SIZE];
+    } cmdIn;
+    union {
+        ReadClock_Out readClock;
+        byte maxOutput[MAX_RESPONSE_SIZE];
+    } cmdOut;
+
+    TPMS_AUTH_COMMAND session[MAX_SESSION_NUM];
+
+    UINT64 oldClock, newClock;
+
+    printf("TPM2 Demo of setting the TPM clock forward\n");
+    rc = wolfTPM2_Init(&dev, TPM2_IoCb, userCtx);
+    if (rc != TPM_RC_SUCCESS) {
+        printf("wolfTPM2_Init failed 0x%x: %s\n", rc, TPM2_GetRCString(rc));
+        goto exit;
+    }
+    printf("wolfTPM2_Init: success\n");
+
+
+    /* Define the default session auth that has NULL password */
+    XMEMSET(session, 0, sizeof(session));
+    session[0].sessionHandle = TPM_RS_PW;
+    session[0].auth.size = 0; /* NULL Password */
+    TPM2_SetSessionAuth(session);
+
+
+    /* ReadClock the current TPM uptime */
+    XMEMSET(&cmdOut.readClock, 0, sizeof(cmdOut.readClock));
+    rc = TPM2_ReadClock(&cmdOut.readClock);
+    if (rc != TPM_RC_SUCCESS) {
+        printf("TPM2_ReadClock failed 0x%x: %s\n", rc,
+            TPM2_GetRCString(rc));
+        goto exit;
+    }
+    printf("TPM2_ReadClock: success\n");
+    printf("TPM2_ReadClock: (total)  time=%lu\n",
+            cmdOut.readClock.currentTime.time);
+    printf("TPM2_ReadClock: (uptime) clock=%lu\n",
+            cmdOut.readClock.currentTime.clockInfo.clock);
+    oldClock = cmdOut.readClock.currentTime.clockInfo.clock;
+
+    /* Set Clock forward by 50 seconds */
+    cmdIn.clockSet.auth = TPM_RH_OWNER;
+    cmdIn.clockSet.newTime = oldClock + 50000;
+    rc = TPM2_ClockSet(&cmdIn.clockSet);
+    if (rc != TPM_RC_SUCCESS) {
+        printf("TPM2_clockSet failed 0x%x: %s\n", rc,
+            TPM2_GetRCString(rc));
+        goto exit;
+    }
+    printf("TPM2_clockSet: success\n");
+
+    /* ReadClock to check the new clock time is set */
+    XMEMSET(&cmdOut.readClock, 0, sizeof(cmdOut.readClock));
+    rc = TPM2_ReadClock(&cmdOut.readClock);
+    if (rc != TPM_RC_SUCCESS) {
+        printf("TPM2_ReadClock failed 0x%x: %s\n", rc,
+            TPM2_GetRCString(rc));
+        goto exit;
+    }
+    printf("TPM2_ReadClock: success\n");
+    printf("TPM2_ReadClock: (total)  time=%lu\n",
+            cmdOut.readClock.currentTime.time);
+    printf("TPM2_ReadClock: (uptime) clock=%lu\n",
+            cmdOut.readClock.currentTime.clockInfo.clock);
+    newClock = cmdOut.readClock.currentTime.clockInfo.clock;
+
+    printf("\n\t oldClock=%lu \n\t newClock=%lu \n\n", oldClock, newClock);
+
+exit:
+
+    if (rc != 0) {
+        printf("Failure 0x%x: %s\n", rc, wolfTPM2_GetRCString(rc));
+    }
+
+    wolfTPM2_Cleanup(&dev);
+    return rc;
+}
+
+/******************************************************************************/
+/* --- END TPM Timestamp Test -- */
+/******************************************************************************/
+
+#endif /* !WOLFTPM2_NO_WRAPPER */
+
+
+#ifndef NO_MAIN_DRIVER
+int main(void)
+{
+    int rc = -1;
+
+#ifndef WOLFTPM2_NO_WRAPPER
+    rc = TPM2_ClockSet_Test(NULL);
+#else
+    printf("Wrapper code not compiled in\n");
+#endif /* !WOLFTPM2_NO_WRAPPER */
+
+    return rc;
+}
+#endif

examples/clock/clockSet.h

@@ -0,0 +1,35 @@
+/* clockSet.h
+ *
+ * Copyright (C) 2006-2020 wolfSSL Inc.
+ *
+ * This file is part of wolfTPM.
+ *
+ * wolfTPM is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * wolfTPM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#ifndef _CLOCK_SET_H_
+#define _CLOCK_SET_H_
+
+#ifdef __cplusplus
+    extern "C" {
+#endif
+
+int TPM2_ClockSet_Test(void* userCtx);
+
+#ifdef __cplusplus
+    }  /* extern "C" */
+#endif
+
+#endif /* _CLOCK_SET_H_ */

examples/clock/include.am

@@ -0,0 +1,14 @@
+# vim:ft=automake
+# All paths should be given relative to the root
+
+if BUILD_EXAMPLES
+noinst_PROGRAMS += examples/clock/clockSet
+noinst_HEADERS  += examples/clock/clockSet.h
+examples_clock_clockSet_SOURCES      = examples/clock/clockSet.c \
+                                                   examples/tpm_io.c
+examples_clock_clockSet_LDADD        = src/libwolftpm.la $(LIB_STATIC_ADD)
+examples_clock_clockSet_DEPENDENCIES = src/libwolftpm.la
+endif
+
+dist_example_DATA+= examples/clock/clockSet.c
+DISTCLEANFILES+= examples/clock/.libs/clockSet

examples/include.am

@@ -9,6 +9,7 @@ include examples/csr/include.am
 include examples/pkcs7/include.am
 include examples/timestamp/include.am
 include examples/pcr/include.am
+include examples/clock/include.am
 
 dist_example_DATA+= examples/README.md \
                     examples/tpm_io.c \