1
2/*
3 * Licensed Materials - Property of IBM
4 *
5 * trousers - An open source TCG Software Stack
6 *
7 * (C) Copyright International Business Machines Corp. 2004-2006
8 *
9 */
10
11
12#include <stdlib.h>
13#include <stdio.h>
14#include <string.h>
15#include <unistd.h>
16#include <sys/types.h>
17#include <sys/mman.h>
18#include <errno.h>
19
20#include "trousers/tss.h"
21#include "trousers/trousers.h"
22#include "trousers_types.h"
23#include "trousers_types.h"
24#include "spi_utils.h"
25#include "capabilities.h"
26#include "tsplog.h"
27#include "obj.h"
28
29
30TSS_RESULT
31get_tpm_flags(TSS_HCONTEXT tspContext, TSS_HTPM hTPM, UINT32 *volFlags, UINT32 *nonVolFlags)
32{
33	TCPA_DIGEST digest;
34	TPM_AUTH auth;
35	TCPA_VERSION version;
36	TSS_RESULT result;
37	TSS_HPOLICY hPolicy;
38	Trspi_HashCtx hashCtx;
39
40	if ((result = obj_tpm_get_policy(hTPM, TSS_POLICY_USAGE, &hPolicy)))
41		return result;
42
43	/* do an owner authorized get capability call */
44	result = Trspi_HashInit(&hashCtx, TSS_HASH_SHA1);
45	result |= Trspi_Hash_UINT32(&hashCtx, TPM_ORD_GetCapabilityOwner);
46	if ((result |= Trspi_HashFinal(&hashCtx, digest.digest)))
47		return result;
48
49	if ((result = secret_PerformAuth_OIAP(hTPM, TPM_ORD_GetCapabilityOwner, hPolicy, FALSE,
50					      &digest, &auth)))
51		return result;
52
53	if ((result = TCS_API(tspContext)->GetCapabilityOwner(tspContext, &auth, &version,
54							      nonVolFlags, volFlags)))
55		return result;
56
57	result = Trspi_HashInit(&hashCtx, TSS_HASH_SHA1);
58	result |= Trspi_Hash_UINT32(&hashCtx, result);
59	result |= Trspi_Hash_UINT32(&hashCtx, TPM_ORD_GetCapabilityOwner);
60	result |= Trspi_Hash_VERSION(&hashCtx, (TSS_VERSION *)&version);
61	result |= Trspi_Hash_UINT32(&hashCtx, *nonVolFlags);
62	result |= Trspi_Hash_UINT32(&hashCtx, *volFlags);
63	if ((result |= Trspi_HashFinal(&hashCtx, digest.digest)))
64		return result;
65
66	return obj_policy_validate_auth_oiap(hPolicy, &digest, &auth);
67}
68