Line | Count | Source |
1 | | // This file was extracted from the TCG Published |
2 | | // Trusted Platform Module Library |
3 | | // Part 3: Commands |
4 | | // Family "2.0" |
5 | | // Level 00 Revision 01.16 |
6 | | // October 30, 2014 |
7 | | |
8 | | #include "InternalRoutines.h" |
9 | | #include "ECDH_ZGen_fp.h" |
10 | | #ifdef TPM_ALG_ECC |
11 | | // |
12 | | // |
13 | | // Error Returns Meaning |
14 | | // |
15 | | // TPM_RC_ATTRIBUTES key referenced by keyA is restricted or not a decrypt key |
16 | | // TPM_RC_KEY key referenced by keyA is not an ECC key |
17 | | // TPM_RC_NO_RESULT multiplying inPoint resulted in a point at infinity |
18 | | // TPM_RC_SCHEME the scheme of the key referenced by keyA is not TPM_ALG_NULL, |
19 | | // TPM_ALG_ECDH, |
20 | | // |
21 | | TPM_RC |
22 | | TPM2_ECDH_ZGen( |
23 | | ECDH_ZGen_In *in, // IN: input parameter list |
24 | | ECDH_ZGen_Out *out // OUT: output parameter list |
25 | | ) |
26 | 0 | { |
27 | 0 | TPM_RC result; |
28 | 0 | OBJECT *eccKey; |
29 | | |
30 | | // Input Validation |
31 | |
|
32 | 0 | eccKey = ObjectGet(in->keyHandle); |
33 | | |
34 | | // Input key must be a non-restricted, decrypt ECC key |
35 | 0 | if( eccKey->publicArea.type != TPM_ALG_ECC) |
36 | 0 | return TPM_RC_KEY + RC_ECDH_ZGen_keyHandle; |
37 | | |
38 | 0 | if( eccKey->publicArea.objectAttributes.restricted == SET |
39 | 0 | || eccKey->publicArea.objectAttributes.decrypt != SET |
40 | 0 | ) |
41 | 0 | return TPM_RC_ATTRIBUTES + RC_ECDH_ZGen_keyHandle; |
42 | | |
43 | | // Make sure the scheme allows this use |
44 | 0 | if( eccKey->publicArea.parameters.eccDetail.scheme.scheme != TPM_ALG_ECDH |
45 | 0 | && eccKey->publicArea.parameters.eccDetail.scheme.scheme != TPM_ALG_NULL) |
46 | 0 | return TPM_RC_SCHEME + RC_ECDH_ZGen_keyHandle; |
47 | | |
48 | | // Command Output |
49 | | |
50 | | // Compute Z. TPM_RC_ECC_POINT or TPM_RC_NO_RESULT may be returned here. |
51 | 0 | result = CryptEccPointMultiply(&out->outPoint.t.point, |
52 | 0 | eccKey->publicArea.parameters.eccDetail.curveID, |
53 | 0 | &eccKey->sensitive.sensitive.ecc, |
54 | 0 | &in->inPoint.t.point); |
55 | 0 | if(result != TPM_RC_SUCCESS) |
56 | 0 | return RcSafeAddToResult(result, RC_ECDH_ZGen_inPoint); |
57 | | |
58 | 0 | out->outPoint.t.size = TPMS_ECC_POINT_Marshal(&out->outPoint.t.point, |
59 | 0 | NULL, NULL); |
60 | |
|
61 | 0 | return TPM_RC_SUCCESS; |
62 | 0 | } |
63 | | #endif |