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63 lines
2.2 KiB
63 lines
2.2 KiB
// 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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