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 "GetTime_fp.h"
38
39 #if CC_GetTime // Conditional expansion of this file
40
41 /*(See part 3 specification)
42 // Applies a time stamp to the passed blob (qualifyingData).
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_GetTime(GetTime_In * in,GetTime_Out * out)56 TPM2_GetTime(
57 GetTime_In *in, // IN: input parameter list
58 GetTime_Out *out // OUT: output parameter list
59 )
60 {
61 TPMS_ATTEST timeInfo;
62 OBJECT *signObject = HandleToObject(in->signHandle);
63 // Input Validation
64 if(!IsSigningObject(signObject))
65 return TPM_RCS_KEY + RC_GetTime_signHandle;
66 if(!CryptSelectSignScheme(signObject, &in->inScheme))
67 return TPM_RCS_SCHEME + RC_GetTime_inScheme;
68
69 // Command Output
70 // Fill in attest common fields
71 FillInAttestInfo(in->signHandle, &in->inScheme, &in->qualifyingData, &timeInfo);
72
73 // GetClock specific fields
74 timeInfo.type = TPM_ST_ATTEST_TIME;
75 timeInfo.attested.time.time.time = g_time;
76 TimeFillInfo(&timeInfo.attested.time.time.clockInfo);
77
78 // Firmware version in plain text
79 timeInfo.attested.time.firmwareVersion
80 = (((UINT64)gp.firmwareV1) << 32) + gp.firmwareV2;
81
82 // Sign attestation structure. A NULL signature will be returned if
83 // signObject is NULL.
84 return SignAttestInfo(signObject, &in->inScheme, &timeInfo, &in->qualifyingData,
85 &out->timeInfo, &out->signature);
86 }
87
88 #endif // CC_GetTime