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// This file was extracted from the TCG Published
// Trusted Platform Module Library
// Part 3: Commands
// Family "2.0"
// Level 00 Revision 01.16
// October 30, 2014
#include "InternalRoutines.h"
#include "Attest_spt_fp.h"
#include "GetTime_fp.h"
//
//
// Error Returns Meaning
//
// TPM_RC_KEY key referenced by signHandle is not a signing key
// TPM_RC_SCHEME inScheme is incompatible with signHandle type; or both scheme and
// key's default scheme are empty; or scheme is empty while key's
// default scheme requires explicit input scheme (split signing); or non-
// empty default key scheme differs from scheme
// TPM_RC_VALUE digest generated for the given scheme is greater than the modulus of
// signHandle (for an RSA key); invalid commit status or failed to
// generate r value (for an ECC key)
//
TPM_RC
TPM2_GetTime(
GetTime_In *in, // IN: input parameter list
GetTime_Out *out // OUT: output parameter list
)
{
TPM_RC result;
TPMS_ATTEST timeInfo;
// Command Output
// Filling in attest information
// Common fields
result = FillInAttestInfo(in->signHandle,
&in->inScheme,
&in->qualifyingData,
&timeInfo);
if(result != TPM_RC_SUCCESS)
{
if(result == TPM_RC_KEY)
return TPM_RC_KEY + RC_GetTime_signHandle;
else
return RcSafeAddToResult(result, RC_GetTime_inScheme);
}
// GetClock specific fields
// Attestation type
timeInfo.type = TPM_ST_ATTEST_TIME;
// current clock in plain text
timeInfo.attested.time.time.time = g_time;
TimeFillInfo(&timeInfo.attested.time.time.clockInfo);
// Firmware version in plain text
timeInfo.attested.time.firmwareVersion
= ((UINT64) gp.firmwareV1) << 32;
timeInfo.attested.time.firmwareVersion += gp.firmwareV2;
// Sign attestation structure. A NULL signature will be returned if
// signHandle is TPM_RH_NULL. A TPM_RC_NV_UNAVAILABLE, TPM_RC_NV_RATE,
// TPM_RC_VALUE, TPM_RC_SCHEME or TPM_RC_ATTRIBUTES error may be returned at
// this point
result = SignAttestInfo(in->signHandle,
&in->inScheme,
&timeInfo,
&in->qualifyingData,
&out->timeInfo,
&out->signature);
if(result != TPM_RC_SUCCESS)
return result;
// orderly state should be cleared because of the reporting of clock info
// if signing happens
if(in->signHandle != TPM_RH_NULL)
g_clearOrderly = TRUE;
return TPM_RC_SUCCESS;
}
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