63 lines
2.2 KiB
C
63 lines
2.2 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 "ECDH_ZGen_fp.h"
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#ifdef TPM_ALG_ECC
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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_ATTRIBUTES key referenced by keyA is restricted or not a decrypt key
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// TPM_RC_KEY key referenced by keyA is not an ECC key
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// TPM_RC_NO_RESULT multiplying inPoint resulted in a point at infinity
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// TPM_RC_SCHEME the scheme of the key referenced by keyA is not TPM_ALG_NULL,
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// TPM_ALG_ECDH,
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//
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TPM_RC
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TPM2_ECDH_ZGen(
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ECDH_ZGen_In *in, // IN: input parameter list
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ECDH_ZGen_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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OBJECT *eccKey;
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// Input Validation
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eccKey = ObjectGet(in->keyHandle);
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// Input key must be a non-restricted, decrypt ECC key
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if( eccKey->publicArea.type != TPM_ALG_ECC)
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return TPM_RC_KEY + RC_ECDH_ZGen_keyHandle;
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if( eccKey->publicArea.objectAttributes.restricted == SET
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|| eccKey->publicArea.objectAttributes.decrypt != SET
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)
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return TPM_RC_ATTRIBUTES + RC_ECDH_ZGen_keyHandle;
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// Make sure the scheme allows this use
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if( eccKey->publicArea.parameters.eccDetail.scheme.scheme != TPM_ALG_ECDH
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&& eccKey->publicArea.parameters.eccDetail.scheme.scheme != TPM_ALG_NULL)
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return TPM_RC_SCHEME + RC_ECDH_ZGen_keyHandle;
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// Command Output
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// Compute Z. TPM_RC_ECC_POINT or TPM_RC_NO_RESULT may be returned here.
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result = CryptEccPointMultiply(&out->outPoint.t.point,
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eccKey->publicArea.parameters.eccDetail.curveID,
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&eccKey->sensitive.sensitive.ecc,
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&in->inPoint.t.point);
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if(result != TPM_RC_SUCCESS)
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return RcSafeAddToResult(result, RC_ECDH_ZGen_inPoint);
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out->outPoint.t.size = TPMS_ECC_POINT_Marshal(&out->outPoint.t.point,
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NULL, NULL);
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return TPM_RC_SUCCESS;
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}
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#endif
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