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. 2007
8 *
9 */
10
11
12#include <stdlib.h>
13#include <string.h>
14
15#include "trousers/tss.h"
16#include "trousers/trousers.h"
17#include "trousers_types.h"
18#include "spi_utils.h"
19#include "capabilities.h"
20#include "tsplog.h"
21#include "obj.h"
22
23
24#ifdef TSS_BUILD_TRANSPORT
25TSS_RESULT
26Transport_Sign(TSS_HCONTEXT tspContext,    /* in */
27	       TCS_KEY_HANDLE keyHandle,   /* in */
28	       UINT32 areaToSignSize,      /* in */
29	       BYTE * areaToSign,  /* in */
30	       TPM_AUTH * privAuth,        /* in, out */
31	       UINT32 * sigSize,   /* out */
32	       BYTE ** sig)        /* out */
33{
34	UINT64 offset;
35	TSS_RESULT result;
36	UINT32 handlesLen, decLen, dataLen;
37	TCS_HANDLE *handles, handle;
38	TPM_DIGEST pubKeyHash;
39	Trspi_HashCtx hashCtx;
40	BYTE *dec, *data;
41
42
43	if ((result = obj_context_transport_init(tspContext)))
44		return result;
45
46	LogDebugFn("Executing in a transport session");
47
48	if ((result = obj_tcskey_get_pubkeyhash(keyHandle, pubKeyHash.digest)))
49		return result;
50
51	result = Trspi_HashInit(&hashCtx, TSS_HASH_SHA1);
52	result |= Trspi_Hash_DIGEST(&hashCtx, pubKeyHash.digest);
53	if ((result |= Trspi_HashFinal(&hashCtx, pubKeyHash.digest)))
54		return result;
55
56	handlesLen = 1;
57	handle = keyHandle;
58	handles = &handle;
59
60	dataLen = sizeof(UINT32) + areaToSignSize;
61	if ((data = malloc(dataLen)) == NULL) {
62		LogError("malloc of %u bytes failed", dataLen);
63		return TSPERR(TSS_E_OUTOFMEMORY);
64	}
65
66	offset = 0;
67	Trspi_LoadBlob_UINT32(&offset, areaToSignSize, data);
68	Trspi_LoadBlob(&offset, areaToSignSize, data, areaToSign);
69
70	if ((result = obj_context_transport_execute(tspContext, TPM_ORD_Sign, dataLen, data,
71						    &pubKeyHash, &handlesLen, &handles,
72						    privAuth, NULL, &decLen, &dec))) {
73		free(data);
74		return result;
75	}
76	free(data);
77
78	offset = 0;
79	Trspi_UnloadBlob_UINT32(&offset, sigSize, dec);
80
81	if ((*sig = malloc(*sigSize)) == NULL) {
82		free(dec);
83		LogError("malloc of %u bytes failed", *sigSize);
84		*sigSize = 0;
85		return TSPERR(TSS_E_OUTOFMEMORY);
86	}
87	Trspi_UnloadBlob(&offset, *sigSize, dec, *sig);
88
89	return result;
90}
91#endif
92
93