1 /* Copyright (c) 2011 The Chromium OS Authors. All rights reserved. 2 * Use of this source code is governed by a BSD-style license that can be 3 * found in the LICENSE file. 4 */ 5 6 /* Test of recovery when we hit the NVRAM write limit for an unowned TPM. 7 */ 8 9 #include <stdio.h> 10 #include <stdint.h> 11 #include <stdlib.h> 12 13 #include "host_common.h" 14 #include "tlcl.h" 15 #include "tlcl_tests.h" 16 17 #define TPM_MAX_NV_WRITES_NOOWNER 64 18 19 int main(int argc, char** argv) { 20 int i; 21 22 uint32_t result; 23 24 TlclLibInit(); 25 26 TPM_CHECK(TlclStartupIfNeeded()); 27 TPM_CHECK(TlclSelfTestFull()); 28 TPM_CHECK(TlclAssertPhysicalPresence()); 29 TPM_CHECK(TlclForceClear()); 30 TPM_CHECK(TlclSetEnable()); 31 TPM_CHECK(TlclSetDeactivated(0)); 32 33 for (i = 0; i < TPM_MAX_NV_WRITES_NOOWNER + 2; i++) { 34 printf("writing %d\n", i); 35 if ((result = TlclWrite(INDEX0, (uint8_t*)&i, sizeof(i))) != TPM_SUCCESS) { 36 switch (result) { 37 case TPM_E_MAXNVWRITES: 38 VbAssert(i >= TPM_MAX_NV_WRITES_NOOWNER); 39 break; 40 default: 41 VbExError("unexpected error code %d (0x%x)\n", result, result); 42 } 43 } 44 } 45 46 /* Reset write count */ 47 TPM_CHECK(TlclForceClear()); 48 TPM_CHECK(TlclSetEnable()); 49 TPM_CHECK(TlclSetDeactivated(0)); 50 51 /* Try writing again. */ 52 TPM_CHECK(TlclWrite(INDEX0, (uint8_t*)&i, sizeof(i))); 53 54 printf("TEST SUCCEEDED\n"); 55 exit(0); 56 } 57
