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40 
41 /*
42 //
43 //  Purpose:
44 //     Cryptography Primitive.
45 //     EC over Prime Finite Field (EC Key Generation)
46 //
47 //  Contents:
48 //     ippsECCPSetKeyPair()
49 //
50 //
51 */
52 
53 #include "owndefs.h"
54 #include "owncp.h"
55 #include "pcpeccp.h"
56 
57 
58 /*F*
59 //    Name: ippsECCPSetKeyPair
60 //
61 // Purpose: Generate (private,public) Key Pair
62 //
63 // Returns:                   Reason:
64 //    ippStsNullPtrErr           NULL == pEC
65 //                               NULL == pPrivate
66 //                               NULL == pPublic
67 //
68 //    ippStsContextMatchErr      illegal pEC->idCtx
69 //                               illegal pPrivate->idCtx
70 //                               illegal pPublic->idCtx
71 //
72 //    ippStsNoErr                no errors
73 //
74 // Parameters:
75 //    pPrivate    pointer to the private key
76 //    pPublic     pointer to the public  key
77 //    regular     flag regular/ephemeral keys
78 //    pEC        pointer to the ECCP context
79 //
80 *F*/
81 IPPFUN(IppStatus, ippsECCPSetKeyPair, (const IppsBigNumState* pPrivate, const IppsECCPPointState* pPublic,
82                                        IppBool regular,
83                                        IppsECCPState* pEC))
84 {
85    /* use aligned EC context */
86    IPP_BAD_PTR1_RET(pEC);
87    pEC = (IppsGFpECState*)( IPP_ALIGNED_PTR(pEC, ECGFP_ALIGNMENT) );
88    IPP_BADARG_RET(!ECP_TEST_ID(pEC), ippStsContextMatchErr);
89 
90    {
91       BNU_CHUNK_T* targetPrivate;
92       BNU_CHUNK_T* targetPublic;
93 
94       if(regular) {
95          targetPrivate = ECP_PRIVAT(pEC);
96          targetPublic  = ECP_PUBLIC(pEC);
97       }
98       else {
99          targetPrivate = ECP_PRIVAT_E(pEC);
100          targetPublic  = ECP_PUBLIC_E(pEC);
101       }
102 
103       /* set up private key request */
104       if( pPrivate ) {
105          pPrivate = (IppsBigNumState*)( IPP_ALIGNED_PTR(pPrivate, ALIGN_VAL) );
106          IPP_BADARG_RET(!BN_VALID_ID(pPrivate), ippStsContextMatchErr);
107          {
108             int privateLen = BITS_BNU_CHUNK(ECP_ORDBITSIZE(pEC));
109             cpGFpElementCopyPadd(targetPrivate, privateLen, BN_NUMBER(pPrivate), BN_SIZE(pPrivate));
110          }
111       }
112 
113       /* set up public  key request */
114       if( pPublic ) {
115          IPP_BADARG_RET( !ECP_POINT_TEST_ID(pPublic), ippStsContextMatchErr );
116          {
117             BNU_CHUNK_T* targetPublicX = targetPublic;
118             BNU_CHUNK_T* targetPublicY = targetPublic+ECP_POINT_FELEN(pPublic);
119             gfec_GetPoint(targetPublicX, targetPublicY, pPublic, pEC);
120             gfec_SetPoint(targetPublic, targetPublicX, targetPublicY, pEC);
121 
122             //cpGFpElementCopy(targetPublic, ECP_POINT_DATA(pPublic), publicLen);
123          }
124       }
125 
126       return ippStsNoErr;
127    }
128 }
129