1 // This file was extracted from the TCG Published
2 // Trusted Platform Module Library
3 // Part 3: Commands
4 // Family "2.0"
5 // Level 00 Revision 01.16
6 // October 30, 2014
7
8 #include "InternalRoutines.h"
9 #include "Attest_spt_fp.h"
10 #include "GetTime_fp.h"
11 //
12 //
13 // Error Returns Meaning
14 //
15 // TPM_RC_KEY key referenced by signHandle is not a signing key
16 // TPM_RC_SCHEME inScheme is incompatible with signHandle type; or both scheme and
17 // key's default scheme are empty; or scheme is empty while key's
18 // default scheme requires explicit input scheme (split signing); or non-
19 // empty default key scheme differs from scheme
20 // TPM_RC_VALUE digest generated for the given scheme is greater than the modulus of
21 // signHandle (for an RSA key); invalid commit status or failed to
22 // generate r value (for an ECC key)
23 //
24 TPM_RC
TPM2_GetTime(GetTime_In * in,GetTime_Out * out)25 TPM2_GetTime(
26 GetTime_In *in, // IN: input parameter list
27 GetTime_Out *out // OUT: output parameter list
28 )
29 {
30 TPM_RC result;
31 TPMS_ATTEST timeInfo;
32
33 // Command Output
34
35 // Filling in attest information
36 // Common fields
37 result = FillInAttestInfo(in->signHandle,
38 &in->inScheme,
39 &in->qualifyingData,
40 &timeInfo);
41 if(result != TPM_RC_SUCCESS)
42 {
43 if(result == TPM_RC_KEY)
44 return TPM_RC_KEY + RC_GetTime_signHandle;
45 else
46 return RcSafeAddToResult(result, RC_GetTime_inScheme);
47 }
48
49 // GetClock specific fields
50 // Attestation type
51 timeInfo.type = TPM_ST_ATTEST_TIME;
52
53 // current clock in plain text
54 timeInfo.attested.time.time.time = g_time;
55 TimeFillInfo(&timeInfo.attested.time.time.clockInfo);
56
57 // Firmware version in plain text
58 timeInfo.attested.time.firmwareVersion
59 = ((UINT64) gp.firmwareV1) << 32;
60 timeInfo.attested.time.firmwareVersion += gp.firmwareV2;
61
62 // Sign attestation structure. A NULL signature will be returned if
63 // signHandle is TPM_RH_NULL. A TPM_RC_NV_UNAVAILABLE, TPM_RC_NV_RATE,
64 // TPM_RC_VALUE, TPM_RC_SCHEME or TPM_RC_ATTRIBUTES error may be returned at
65 // this point
66 result = SignAttestInfo(in->signHandle,
67 &in->inScheme,
68 &timeInfo,
69 &in->qualifyingData,
70 &out->timeInfo,
71 &out->signature);
72 if(result != TPM_RC_SUCCESS)
73 return result;
74
75 // orderly state should be cleared because of the reporting of clock info
76 // if signing happens
77 if(in->signHandle != TPM_RH_NULL)
78 g_clearOrderly = TRUE;
79
80 return TPM_RC_SUCCESS;
81 }
82