static TPM_RESULT execute_TPM_OIAP(TPM_REQUEST *req, TPM_RESPONSE *rsp)
{
BYTE *ptr;
UINT32 len;
TPM_AUTHHANDLE authHandle;
TPM_NONCE nonceEven;
TPM_RESULT res;
/* execute command */
res = TPM_OIAP(&authHandle, &nonceEven);
if (res != TPM_SUCCESS) return res;
/* marshal output */
rsp->paramSize = len = 4 + 20;
rsp->param = ptr = malloc(len);
if (ptr == NULL
|| tpm_marshal_TPM_AUTHHANDLE(&ptr, &len, authHandle)
|| tpm_marshal_TPM_NONCE(&ptr, &len, &nonceEven)) {
free(rsp->param);
res = TPM_FAIL;
}
return res;
}
int TPM_disk_unseal(void *dst, size_t size, const struct disk_seal_entry *src)
{
uint32_t rc;
TPM_STORED_DATA12 in;
TPM_AUTH_SESSION oiap = TPM_AUTH_SESSION_INIT;
TPM_AUTHDATA auth;
uint32_t outSize = 0;
uint8_t *out = NULL;
printk("Calling TPM_disk_unseal\n");
rc = TPM_OIAP(&oiap);
if (rc) abort();
memset(auth, 0, 20);
in.tag = TPM_TAG_STORED_DATA12;
in.et = 0;
//in.sealInfoLongSize = sizeof_TPM_PCR_INFO_LONG(&in.sealInfoLong);
in.sealInfoLongSize = 2 + 1 + 1 + 2 + 3 + 2 + 3 + 20 + 20;
in.sealInfoLong.tag = TPM_TAG_PCR_INFO_LONG;
in.sealInfoLong.localityAtCreation = 1 << vtpm_globals.hw_locality;
in.sealInfoLong.localityAtRelease = 1 << vtpm_globals.hw_locality;
in.sealInfoLong.creationPCRSelection.sizeOfSelect = 3;
in.sealInfoLong.creationPCRSelection.pcrSelect = (void*)&src->pcr_selection;
in.sealInfoLong.releasePCRSelection.sizeOfSelect = 3;
in.sealInfoLong.releasePCRSelection.pcrSelect = (void*)&src->pcr_selection;
memcpy(&in.sealInfoLong.digestAtCreation, &src->digest_at_seal, 20);
memcpy(&in.sealInfoLong.digestAtRelease, &src->digest_release, 20);
in.encDataSize = 256;
in.encData = (void*)src->sealed_data;
#ifdef DEBUG_SEAL_OPS
uint8_t buf[512];
uint8_t *start = buf;
uint8_t *end = pack_TPM_STORED_DATA12(buf, &in);
printk("stored_data:");
while (start != end) {
printk(" %02x", *start);
start++;
}
printk("\n");
#endif
rc = TPM_Unseal(TPM_SRK_KEYHANDLE, &in, &outSize, &out,
(void*)&vtpm_globals.srk_auth, (void*)&auth, &vtpm_globals.oiap, &oiap);
TPM_TerminateHandle(oiap.AuthHandle);
#ifdef DEBUG_SEAL_OPS
printk("TPM_Unseal rc=%d outSize=%d size=%d\n", rc, outSize, size);
#endif
if (!rc) {
memcpy(dst, out, size);
#ifdef DEBUG_SEAL_OPS
printk("unsealed:");
int i;
for(i=0; i < size; i++)
printk(" %02x", ((uint8_t*)dst)[i]);
printk("\n");
#endif
}
free(out);
return rc;
}
