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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 "GetCommandAuditDigest_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_GetCommandAuditDigest(
GetCommandAuditDigest_In *in, // IN: input parameter list
GetCommandAuditDigest_Out *out // OUT: output parameter list
)
{
TPM_RC result;
TPMS_ATTEST auditInfo;
// Command Output
// Filling in attest information
// Common fields
result = FillInAttestInfo(in->signHandle,
&in->inScheme,
&in->qualifyingData,
&auditInfo);
if(result != TPM_RC_SUCCESS)
{
if(result == TPM_RC_KEY)
return TPM_RC_KEY + RC_GetCommandAuditDigest_signHandle;
else
return RcSafeAddToResult(result, RC_GetCommandAuditDigest_inScheme);
}
// CommandAuditDigest specific fields
// Attestation type
auditInfo.type = TPM_ST_ATTEST_COMMAND_AUDIT;
// Copy audit hash algorithm
auditInfo.attested.commandAudit.digestAlg = gp.auditHashAlg;
// Copy counter value
auditInfo.attested.commandAudit.auditCounter = gp.auditCounter;
// Copy command audit log
auditInfo.attested.commandAudit.auditDigest = gr.commandAuditDigest;
CommandAuditGetDigest(&auditInfo.attested.commandAudit.commandDigest);
// 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,
&auditInfo,
&in->qualifyingData,
&out->auditInfo,
&out->signature);
if(result != TPM_RC_SUCCESS)
return result;
// Internal Data Update
if(in->signHandle != TPM_RH_NULL)
{
// Reset log
gr.commandAuditDigest.t.size = 0;
// orderly state should be cleared because of the update in
// commandAuditDigest, as well as the reporting of clock info
g_clearOrderly = TRUE;
}
return TPM_RC_SUCCESS;
}
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