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
25 TSS_RESULT
Transport_GetRandom(TSS_HCONTEXT tspContext,UINT32 bytesRequested,BYTE ** randomBytes)26 Transport_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
56 TSS_RESULT
Transport_StirRandom(TSS_HCONTEXT tspContext,UINT32 inDataSize,BYTE * inData)57 Transport_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