1 /* Microsoft Reference Implementation for TPM 2.0
2 *
3 * The copyright in this software is being made available under the BSD License,
4 * included below. This software may be subject to other third party and
5 * contributor rights, including patent rights, and no such rights are granted
6 * under this license.
7 *
8 * Copyright (c) Microsoft Corporation
9 *
10 * All rights reserved.
11 *
12 * BSD License
13 *
14 * Redistribution and use in source and binary forms, with or without modification,
15 * are permitted provided that the following conditions are met:
16 *
17 * Redistributions of source code must retain the above copyright notice, this list
18 * of conditions and the following disclaimer.
19 *
20 * Redistributions in binary form must reproduce the above copyright notice, this
21 * list of conditions and the following disclaimer in the documentation and/or
22 * other materials provided with the distribution.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ""AS IS""
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
27 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
28 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
29 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
30 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
31 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35 #include "Tpm.h"
36 #include "Hash_fp.h"
37
38 #if CC_Hash // Conditional expansion of this file
39
40 /*(See part 3 specification)
41 // Hash a data buffer
42 */
43 TPM_RC
TPM2_Hash(Hash_In * in,Hash_Out * out)44 TPM2_Hash(
45 Hash_In *in, // IN: input parameter list
46 Hash_Out *out // OUT: output parameter list
47 )
48 {
49 HASH_STATE hashState;
50
51 // Command Output
52
53 // Output hash
54 // Start hash stack
55 out->outHash.t.size = CryptHashStart(&hashState, in->hashAlg);
56 // Adding hash data
57 CryptDigestUpdate2B(&hashState, &in->data.b);
58 // Complete hash
59 CryptHashEnd2B(&hashState, &out->outHash.b);
60
61 // Output ticket
62 out->validation.tag = TPM_ST_HASHCHECK;
63 out->validation.hierarchy = in->hierarchy;
64
65 if(in->hierarchy == TPM_RH_NULL)
66 {
67 // Ticket is not required
68 out->validation.hierarchy = TPM_RH_NULL;
69 out->validation.digest.t.size = 0;
70 }
71 else if(in->data.t.size >= sizeof(TPM_GENERATED_VALUE)
72 && !TicketIsSafe(&in->data.b))
73 {
74 // Ticket is not safe
75 out->validation.hierarchy = TPM_RH_NULL;
76 out->validation.digest.t.size = 0;
77 }
78 else
79 {
80 // Compute ticket
81 TicketComputeHashCheck(in->hierarchy, in->hashAlg,
82 &out->outHash, &out->validation);
83 }
84
85 return TPM_RC_SUCCESS;
86 }
87
88 #endif // CC_Hash