120 lines
4.2 KiB
C
120 lines
4.2 KiB
C
// This file was extracted from the TCG Published
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// Trusted Platform Module Library
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// Part 3: Commands
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// Family "2.0"
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// Level 00 Revision 01.16
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// October 30, 2014
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#include "InternalRoutines.h"
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#include "Attest_spt_fp.h"
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#include "NV_spt_fp.h"
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#include "NV_Certify_fp.h"
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//
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//
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// Error Returns Meaning
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//
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// TPM_RC_NV_AUTHORIZATION the authorization was valid but the authorizing entity (authHandle) is
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// not allowed to read from the Index referenced by nvIndex
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// TPM_RC_KEY signHandle does not reference a signing key
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// TPM_RC_NV_LOCKED Index referenced by nvIndex is locked for reading
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// TPM_RC_NV_RANGE offset plus size extends outside of the data range of the Index
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// referenced by nvIndex
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// TPM_RC_NV_UNINITIALIZED Index referenced by nvIndex has not been written
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// TPM_RC_SCHEME inScheme is not an allowed value for the key definition
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//
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TPM_RC
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TPM2_NV_Certify(
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NV_Certify_In *in, // IN: input parameter list
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NV_Certify_Out *out // OUT: output parameter list
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)
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{
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TPM_RC result;
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NV_INDEX nvIndex;
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TPMS_ATTEST certifyInfo;
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// Attestation command may cause the orderlyState to be cleared due to
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// the reporting of clock info. If this is the case, check if NV is
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// available first
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if(gp.orderlyState != SHUTDOWN_NONE)
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{
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// The command needs NV update. Check if NV is available.
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// A TPM_RC_NV_UNAVAILABLE or TPM_RC_NV_RATE error may be returned at
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// this point
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result = NvIsAvailable();
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if(result != TPM_RC_SUCCESS)
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return result;
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}
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// Input Validation
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// Get NV index info
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NvGetIndexInfo(in->nvIndex, &nvIndex);
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// Common access checks. A TPM_RC_NV_AUTHORIZATION or TPM_RC_NV_LOCKED
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// error may be returned at this point
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result = NvReadAccessChecks(in->authHandle, in->nvIndex);
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if(result != TPM_RC_SUCCESS)
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return result;
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// See if the range to be certified is out of the bounds of the defined
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// Index
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if((in->size + in->offset) > nvIndex.publicArea.dataSize)
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return TPM_RC_NV_RANGE;
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// Command Output
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// Filling in attest information
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// Common fields
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// FillInAttestInfo can return TPM_RC_SCHEME or TPM_RC_KEY
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result = FillInAttestInfo(in->signHandle,
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&in->inScheme,
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&in->qualifyingData,
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&certifyInfo);
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if(result != TPM_RC_SUCCESS)
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{
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if(result == TPM_RC_KEY)
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return TPM_RC_KEY + RC_NV_Certify_signHandle;
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else
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return RcSafeAddToResult(result, RC_NV_Certify_inScheme);
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}
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// NV certify specific fields
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// Attestation type
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certifyInfo.type = TPM_ST_ATTEST_NV;
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// Get the name of the index
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certifyInfo.attested.nv.indexName.t.size =
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NvGetName(in->nvIndex, &certifyInfo.attested.nv.indexName.t.name);
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// Set the return size
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certifyInfo.attested.nv.nvContents.t.size = in->size;
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// Set the offset
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certifyInfo.attested.nv.offset = in->offset;
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// Perform the read
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NvGetIndexData(in->nvIndex, &nvIndex,
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in->offset, in->size,
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certifyInfo.attested.nv.nvContents.t.buffer);
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// Sign attestation structure. A NULL signature will be returned if
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// signHandle is TPM_RH_NULL. SignAttestInfo() may return TPM_RC_VALUE,
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// TPM_RC_SCHEME or TPM_RC_ATTRUBUTES.
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// Note: SignAttestInfo may return TPM_RC_ATTRIBUTES if the key is not a
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// signing key but that was checked above. TPM_RC_VALUE would mean that the
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// data to sign is too large but the data to sign is a digest
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result = SignAttestInfo(in->signHandle,
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&in->inScheme,
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&certifyInfo,
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&in->qualifyingData,
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&out->certifyInfo,
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&out->signature);
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if(result != TPM_RC_SUCCESS)
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return result;
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// orderly state should be cleared because of the reporting of clock info
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// if signing happens
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if(in->signHandle != TPM_RH_NULL)
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g_clearOrderly = TRUE;
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return TPM_RC_SUCCESS;
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}
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