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. 2004-2007
8 *
9 */
10
11
12#include <stdlib.h>
13#include <stdio.h>
14#include <string.h>
15
16#include "trousers/tss.h"
17#include "trousers/trousers.h"
18#include "trousers_types.h"
19#include "spi_utils.h"
20#include "capabilities.h"
21#include "tsplog.h"
22#include "obj.h"
23
24
25#ifdef TSS_BUILD_TRANSPORT
26TSS_RESULT
27Transport_ReadCurrentTicks(TSS_HCONTEXT tspContext,           /* in */
28			   UINT32*      pulCurrentTime,       /* out */
29			   BYTE**       prgbCurrentTime)      /* out */
30{
31	TSS_RESULT result;
32	UINT32 decLen = 0;
33	BYTE *dec = NULL;
34	TCS_HANDLE handlesLen = 0;
35
36	if ((result = obj_context_transport_init(tspContext)))
37		return result;
38
39	LogDebugFn("Executing in a transport session");
40
41	if ((result = obj_context_transport_execute(tspContext, TPM_ORD_GetTicks, 0, NULL,
42						    NULL, &handlesLen, NULL, NULL, NULL, &decLen,
43						    &dec)))
44		return result;
45
46	*pulCurrentTime = decLen;
47	*prgbCurrentTime = dec;
48
49	return TSS_SUCCESS;
50}
51
52TSS_RESULT
53Transport_TickStampBlob(TSS_HCONTEXT   tspContext,            /* in */
54			TCS_KEY_HANDLE hKey,                  /* in */
55			TPM_NONCE*     antiReplay,            /* in */
56			TPM_DIGEST*    digestToStamp,	      /* in */
57			TPM_AUTH*      privAuth,              /* in, out */
58			UINT32*        pulSignatureLength,    /* out */
59			BYTE**         prgbSignature,	      /* out */
60			UINT32*        pulTickCountLength,    /* out */
61			BYTE**         prgbTickCount)	      /* out */
62{
63	TSS_RESULT result;
64	UINT32 handlesLen, decLen = 0;
65	TCS_HANDLE *handles, handle;
66	BYTE *dec = NULL;
67	UINT64 offset;
68	TPM_DIGEST pubKeyHash;
69	Trspi_HashCtx hashCtx;
70	BYTE data[sizeof(TPM_NONCE) + sizeof(TPM_DIGEST)];
71
72	if ((result = obj_context_transport_init(tspContext)))
73		return result;
74
75	LogDebugFn("Executing in a transport session");
76
77	if ((result = obj_tcskey_get_pubkeyhash(hKey, pubKeyHash.digest)))
78		return result;
79
80	result = Trspi_HashInit(&hashCtx, TSS_HASH_SHA1);
81	result |= Trspi_Hash_DIGEST(&hashCtx, pubKeyHash.digest);
82	if ((result |= Trspi_HashFinal(&hashCtx, pubKeyHash.digest)))
83		return result;
84
85	handlesLen = 1;
86	handle = hKey;
87	handles = &handle;
88
89	offset = 0;
90	Trspi_LoadBlob_NONCE(&offset, data, antiReplay);
91	Trspi_LoadBlob_DIGEST(&offset, data, digestToStamp);
92
93	if ((result = obj_context_transport_execute(tspContext, TPM_ORD_TickStampBlob, sizeof(data),
94						    data, &pubKeyHash, &handlesLen, &handles,
95						    privAuth, NULL, &decLen, &dec)))
96		return result;
97
98	offset = 0;
99	Trspi_UnloadBlob_CURRENT_TICKS(&offset, dec, NULL);
100	*pulTickCountLength = (UINT32)offset;
101	if ((*prgbTickCount = malloc(*pulTickCountLength)) == NULL) {
102		free(dec);
103		LogError("malloc of %u bytes failed", *pulTickCountLength);
104		return TSPERR(TSS_E_OUTOFMEMORY);
105	}
106	offset = 0;
107	Trspi_UnloadBlob(&offset, *pulTickCountLength, dec, *prgbTickCount);
108
109	Trspi_UnloadBlob_UINT32(&offset, pulSignatureLength, dec);
110	if ((*prgbSignature = malloc(*pulSignatureLength)) == NULL) {
111		free(dec);
112		free(*prgbTickCount);
113		*pulTickCountLength = 0;
114		LogError("malloc of %u bytes failed", *pulSignatureLength);
115		*pulSignatureLength = 0;
116		return TSPERR(TSS_E_OUTOFMEMORY);
117	}
118	Trspi_UnloadBlob(&offset, *pulSignatureLength, dec, *prgbSignature);
119
120	free(dec);
121
122	return result;
123}
124#endif
125