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 <syslog.h>
14#include <unistd.h>
15
16#include "trousers/tss.h"
17#include "trousers/trousers.h"
18#include "trousers_types.h"
19#include "spi_utils.h"
20#include "tsplog.h"
21#include "obj.h"
22
23
24#ifdef TSS_BUILD_TRANSPORT
25TSS_RESULT
26Transport_GetRandom(TSS_HCONTEXT tspContext,	/* in */
27		    UINT32 bytesRequested,	/* in */
28		    BYTE ** randomBytes)	/* out */
29{
30	TSS_RESULT result;
31        UINT32 decLen = 0;
32        BYTE *dec = NULL;
33        UINT64 offset;
34	TCS_HANDLE handlesLen = 0;
35        BYTE data[sizeof(UINT32)];
36
37	if ((result = obj_context_transport_init(tspContext)))
38		return result;
39
40        LogDebugFn("Executing in a transport session");
41
42        offset = 0;
43        Trspi_LoadBlob_UINT32(&offset, bytesRequested, data);
44
45        if ((result = obj_context_transport_execute(tspContext, TPM_ORD_GetRandom, sizeof(data),
46                                                    data, NULL, &handlesLen, NULL, NULL, NULL,
47						    &decLen, &dec)))
48                return result;
49
50	*randomBytes = dec;
51
52        return result;
53
54}
55
56TSS_RESULT
57Transport_StirRandom(TSS_HCONTEXT tspContext,	/* in */
58		     UINT32 inDataSize,	/* in */
59		     BYTE * inData)	/* in */
60{
61	TSS_RESULT result;
62        UINT64 offset;
63	UINT32 dataLen;
64	TCS_HANDLE handlesLen = 0;
65        BYTE *data;
66
67	if ((result = obj_context_transport_init(tspContext)))
68		return result;
69
70        LogDebugFn("Executing in a transport session");
71
72	dataLen = sizeof(UINT32) + inDataSize;
73	if ((data = malloc(dataLen)) == NULL) {
74                LogError("malloc of %u bytes failed", dataLen);
75                return TSPERR(TSS_E_OUTOFMEMORY);
76	}
77
78        offset = 0;
79        Trspi_LoadBlob_UINT32(&offset, inDataSize, data);
80        Trspi_LoadBlob(&offset, inDataSize, data, inData);
81
82	result = obj_context_transport_execute(tspContext, TPM_ORD_StirRandom, dataLen, data, NULL,
83					       &handlesLen, NULL, NULL, NULL, NULL, NULL);
84	free(data);
85
86	return result;
87}
88#endif
89
90