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/* Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Temporary fix for running the TPM selftest and other essential
* intializations that we forgot to put in the BIOS.
*
* This works in a very specific situation: we assume TPM_Startup has been
* executed, but we don't know if the self test has run. On a ST TPM version
* 1.2.7.0, GetCapabilities fails before the self test has run, so we use that
* to check if we need to run it.
*
* This also enables the TPM if it is disabled, and activates it if it is
* deactivated.
*
* Exit status always 0. Prints "reboot" to request reboot, "fail" for errors,
* "success" when everything worked.
*/
#include <stdint.h>
#include <stdio.h>
#include <syslog.h>
#include "tlcl.h"
int main(int argc, char* argv[]) {
uint32_t result;
uint8_t disable, deactivated;
int pri = LOG_USER | LOG_ERR;
TlclLibInit();
TlclStartup(); /* ignore result */
/* On the dogfood device, GetFlags causes an assertion failure because the
* device uses an older TPM which is not compatible with the current spec.
* We take advantage of this to cause the program to exit and not run the
* self test again (which takes 1 second).
*/
result = TlclGetFlags(NULL, NULL, NULL);
result = TlclSelfTestFull();
if (result != 0) {
syslog(pri, "TPM selftest failed with code 0x%x\n", result);
printf("fail\n");
return 0;
}
/* Optional one-time enabling of TPM. */
result = TlclAssertPhysicalPresence();
if (result != 0) {
syslog(pri, "TPM assertpp failed with code 0x%x\n", result);
printf("fail\n");
return 0;
}
result = TlclGetFlags(&disable, &deactivated, NULL);
if (result != 0) {
syslog(pri, "TPM getflags failed with code 0x%x\n", result);
printf("fail\n");
return 0;
}
if (disable) {
result = TlclSetEnable();
if (result != 0) {
syslog(pri, "TPM physical enable failed with code 0x%x\n", result);
printf("fail\n");
return 0;
}
}
if (deactivated) {
result = TlclSetDeactivated(0);
if (result != 0) {
syslog(pri, "TPM physical activate failed with code 0x%x\n", result);
printf("fail\n");
} else {
printf("reboot\n");
}
return 0; /* needs reboot */
}
printf("success\n");
return 0;
}
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