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 "PolicyOR_fp.h"
37
38 #if CC_PolicyOR // Conditional expansion of this file
39
40 #include "Policy_spt_fp.h"
41
42 /*(See part 3 specification)
43 // PolicyOR command
44 */
45 // Return Type: TPM_RC
46 // TPM_RC_VALUE no digest in 'pHashList' matched the current
47 // value of policyDigest for 'policySession'
48 TPM_RC
TPM2_PolicyOR(PolicyOR_In * in)49 TPM2_PolicyOR(
50 PolicyOR_In *in // IN: input parameter list
51 )
52 {
53 SESSION *session;
54 UINT32 i;
55
56 // Input Validation and Update
57
58 // Get pointer to the session structure
59 session = SessionGet(in->policySession);
60
61 // Compare and Update Internal Session policy if match
62 for(i = 0; i < in->pHashList.count; i++)
63 {
64 if(session->attributes.isTrialPolicy == SET
65 || (MemoryEqual2B(&session->u2.policyDigest.b,
66 &in->pHashList.digests[i].b)))
67 {
68 // Found a match
69 HASH_STATE hashState;
70 TPM_CC commandCode = TPM_CC_PolicyOR;
71
72 // Start hash
73 session->u2.policyDigest.t.size
74 = CryptHashStart(&hashState, session->authHashAlg);
75 // Set policyDigest to 0 string and add it to hash
76 MemorySet(session->u2.policyDigest.t.buffer, 0,
77 session->u2.policyDigest.t.size);
78 CryptDigestUpdate2B(&hashState, &session->u2.policyDigest.b);
79
80 // add command code
81 CryptDigestUpdateInt(&hashState, sizeof(TPM_CC), commandCode);
82
83 // Add each of the hashes in the list
84 for(i = 0; i < in->pHashList.count; i++)
85 {
86 // Extend policyDigest
87 CryptDigestUpdate2B(&hashState, &in->pHashList.digests[i].b);
88 }
89 // Complete digest
90 CryptHashEnd2B(&hashState, &session->u2.policyDigest.b);
91
92 return TPM_RC_SUCCESS;
93 }
94 }
95 // None of the values in the list matched the current policyDigest
96 return TPM_RCS_VALUE + RC_PolicyOR_pHashList;
97 }
98
99 #endif // CC_PolicyOR