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tests: fuzz: Register callbacks to avoid creating NVChip file

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Register callbacks so that we don't create the NVChip file.

Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
This commit is contained in:
Stefan Berger 2021-07-22 11:02:09 -04:00 committed by Stefan Berger
parent a59db1faea
commit 70ebecdf6a
1 changed files with 50 additions and 0 deletions
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50
tests/fuzz.cc
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@ -16,6 +16,43 @@ static void die(const char *msg)
assert(false);
}
static TPM_RESULT mytpm_io_init(void)
{
return TPM_SUCCESS;
}
static TPM_RESULT mytpm_io_getlocality(TPM_MODIFIER_INDICATOR *locModif,
uint32_t tpm_number)
{
*locModif = 0;
return TPM_SUCCESS;
}
static TPM_RESULT mytpm_io_getphysicalpresence(TPM_BOOL *phyPres,
uint32_t tpm_number)
{
*phyPres = FALSE;
return TPM_SUCCESS;
}
static TPM_RESULT mytpm_nvram_loaddata(unsigned char **data,
uint32_t *length,
uint32_t tpm_number,
const char *name)
{
return TPM_RETRY;
}
static TPM_RESULT mytpm_nvram_storedata(const unsigned char *data,
uint32_t length,
uint32_t tpm_number,
const char *name)
{
return TPM_SUCCESS;
}
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
{
unsigned char *rbuffer = NULL;
@ -25,6 +62,19 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
unsigned char startup[] = {
0x80, 0x01, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x01, 0x44, 0x00, 0x00
};
struct libtpms_callbacks cbs = {
.sizeOfStruct = sizeof(struct libtpms_callbacks),
.tpm_nvram_init = NULL,
.tpm_nvram_loaddata = mytpm_nvram_loaddata,
.tpm_nvram_storedata = mytpm_nvram_storedata,
.tpm_nvram_deletename = NULL,
.tpm_io_init = mytpm_io_init,
.tpm_io_getlocality = mytpm_io_getlocality,
.tpm_io_getphysicalpresence = mytpm_io_getphysicalpresence,
};
res = TPMLIB_RegisterCallbacks(&cbs);
if (res != TPM_SUCCESS)
die("Could not register callbacks\n");
res = TPMLIB_ChooseTPMVersion(TPMLIB_TPM_VERSION_2);
if (res != TPM_SUCCESS)