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
25 TSS_RESULT
Transport_Sign(TSS_HCONTEXT tspContext,TCS_KEY_HANDLE keyHandle,UINT32 areaToSignSize,BYTE * areaToSign,TPM_AUTH * privAuth,UINT32 * sigSize,BYTE ** sig)26 Transport_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