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 "Attest_spt_fp.h"
37 #include "GetCommandAuditDigest_fp.h"
38
39 #if CC_GetCommandAuditDigest // Conditional expansion of this file
40
41 /*(See part 3 specification)
42 // Get current value of command audit log
43 */
44 // Return Type: TPM_RC
45 // TPM_RC_KEY key referenced by 'signHandle' is not a signing key
46 // TPM_RC_SCHEME 'inScheme' is incompatible with 'signHandle' type; or
47 // both 'scheme' and key's default scheme are empty; or
48 // 'scheme' is empty while key's default scheme requires
49 // explicit input scheme (split signing); or
50 // non-empty default key scheme differs from 'scheme'
51 // TPM_RC_VALUE digest generated for the given 'scheme' is greater than
52 // the modulus of 'signHandle' (for an RSA key);
53 // invalid commit status or failed to generate "r" value
54 // (for an ECC key)
55 TPM_RC
TPM2_GetCommandAuditDigest(GetCommandAuditDigest_In * in,GetCommandAuditDigest_Out * out)56 TPM2_GetCommandAuditDigest(
57 GetCommandAuditDigest_In *in, // IN: input parameter list
58 GetCommandAuditDigest_Out *out // OUT: output parameter list
59 )
60 {
61 TPM_RC result;
62 TPMS_ATTEST auditInfo;
63 OBJECT *signObject = HandleToObject(in->signHandle);
64 // Input validation
65 if(!IsSigningObject(signObject))
66 return TPM_RCS_KEY + RC_GetCommandAuditDigest_signHandle;
67 if(!CryptSelectSignScheme(signObject, &in->inScheme))
68 return TPM_RCS_SCHEME + RC_GetCommandAuditDigest_inScheme;
69
70 // Command Output
71 // Fill in attest information common fields
72 FillInAttestInfo(in->signHandle, &in->inScheme, &in->qualifyingData,
73 &auditInfo);
74
75 // CommandAuditDigest specific fields
76 auditInfo.type = TPM_ST_ATTEST_COMMAND_AUDIT;
77 auditInfo.attested.commandAudit.digestAlg = gp.auditHashAlg;
78 auditInfo.attested.commandAudit.auditCounter = gp.auditCounter;
79
80 // Copy command audit log
81 auditInfo.attested.commandAudit.auditDigest = gr.commandAuditDigest;
82 CommandAuditGetDigest(&auditInfo.attested.commandAudit.commandDigest);
83
84 // Sign attestation structure. A NULL signature will be returned if
85 // signHandle is TPM_RH_NULL. A TPM_RC_NV_UNAVAILABLE, TPM_RC_NV_RATE,
86 // TPM_RC_VALUE, TPM_RC_SCHEME or TPM_RC_ATTRIBUTES error may be returned at
87 // this point
88 result = SignAttestInfo(signObject, &in->inScheme, &auditInfo,
89 &in->qualifyingData, &out->auditInfo,
90 &out->signature);
91 // Internal Data Update
92 if(result == TPM_RC_SUCCESS && in->signHandle != TPM_RH_NULL)
93 // Reset log
94 gr.commandAuditDigest.t.size = 0;
95
96 return result;
97 }
98
99 #endif // CC_GetCommandAuditDigest