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You may 30 * obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 31 * 32 * 33 * Unless required by applicable law or agreed to in writing, software 34 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 35 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 36 * 37 * See the License for the specific language governing permissions and 38 * limitations under the License. 39 *******************************************************************************/ 40 41 /* 42 // 43 // Purpose: 44 // Intel(R) Integrated Performance Primitives. Cryptography Primitives. 45 // EC over GF(p) Operations 46 // 47 // Context: 48 // ippsGFpECSetPointRegular() 49 // 50 */ 51 52 #include "owndefs.h" 53 #include "owncp.h" 54 #include "pcpgfpecstuff.h" 55 #include "pcphash.h" 56 #include "pcphash_rmf.h" 57 58 /*F* 59 // Name: ippsGFpECSetPointRegular 60 // 61 // Purpose: Sets a point with Big Number coordinates 62 // 63 // Returns: Reason: 64 // ippStsNullPtrErr pPoint == NULL 65 // pEC == NULL 66 // pX == NULL 67 // pY == NULL 68 // 69 // ippStsContextMatchErr invalid pEC->idCtx 70 // invalid pPoint->idCtx 71 // invalid pX->idCtx 72 // invalid pY->idCtx 73 // 74 // ippStsOutOfRangeErr GFP_FELEN() < pX <= 0 75 // GFP_FELEN() < pY <= 0 76 // ECP_POINT_FELEN(pPoint)!=GFP_FELEN() 77 // 78 // ippStsNoErr no error 79 // 80 // Parameters: 81 // pX, pY Pointers to the X and Y coordinates of a point on the elliptic curve 82 // pPoint Pointer to the IppsGFpECPoint context 83 // pEC Pointer to the context of the elliptic curve 84 // 85 *F*/ 86 87 IPPFUN(IppStatus, ippsGFpECSetPointRegular,(const IppsBigNumState* pX, const IppsBigNumState* pY, 88 IppsGFpECPoint* pPoint, 89 IppsGFpECState* pEC)) 90 { 91 IPP_BAD_PTR2_RET(pPoint, pEC); 92 pEC = (IppsGFpECState*)( IPP_ALIGNED_PTR(pEC, ECGFP_ALIGNMENT) ); 93 IPP_BADARG_RET( !ECP_TEST_ID(pEC), ippStsContextMatchErr ); 94 IPP_BADARG_RET( !ECP_POINT_TEST_ID(pPoint), ippStsContextMatchErr ); 95 96 IPP_BAD_PTR2_RET(pX, pY); 97 pX = (IppsBigNumState*)( IPP_ALIGNED_PTR(pX, BN_ALIGNMENT) ); 98 pY = (IppsBigNumState*)( IPP_ALIGNED_PTR(pY, BN_ALIGNMENT) ); 99 IPP_BADARG_RET( !BN_VALID_ID(pX), ippStsContextMatchErr ); 100 IPP_BADARG_RET( !BN_VALID_ID(pY), ippStsContextMatchErr ); 101 IPP_BADARG_RET( !BN_POSITIVE(pX), ippStsOutOfRangeErr); 102 IPP_BADARG_RET( !BN_POSITIVE(pY), ippStsOutOfRangeErr); 103 104 { 105 IppsGFpState* pGF = ECP_GFP(pEC); 106 gsModEngine* pGFE = GFP_PMA(pGF); 107 int elemLen = GFP_FELEN(pGFE); 108 109 IPP_BADARG_RET( !GFP_IS_BASIC(pGFE), ippStsBadArgErr ) 110 111 IPP_BADARG_RET( BN_SIZE(pX) > elemLen, ippStsOutOfRangeErr); 112 IPP_BADARG_RET( BN_SIZE(pY) > elemLen, ippStsOutOfRangeErr); 113 IPP_BADARG_RET( ECP_POINT_FELEN(pPoint)!=elemLen, ippStsOutOfRangeErr); 114 115 { 116 BNU_CHUNK_T* pointX = ECP_POINT_X(pPoint); 117 BNU_CHUNK_T* pointY = ECP_POINT_Y(pPoint); 118 BNU_CHUNK_T* pointZ = ECP_POINT_Z(pPoint); 119 120 cpGFpElementCopyPadd(pointX, elemLen, BN_NUMBER(pX), BN_SIZE(pX)); 121 cpGFpElementCopyPadd(pointY, elemLen, BN_NUMBER(pY), BN_SIZE(pY)); 122 cpGFpElementCopy(pointZ, MOD_MNT_R(pGFE), elemLen); 123 124 if( cpGFpSet(pointX, pointX, elemLen, pGFE) && cpGFpSet(pointY, pointY, elemLen, pGFE) ) 125 ECP_POINT_FLAGS(pPoint) = ECP_AFFINE_POINT | ECP_FINITE_POINT; 126 else 127 gfec_SetPointAtInfinity(pPoint); 128 129 return ippStsNoErr; 130 } 131 } 132 } 133