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Diffstat (limited to 'ext/ipp/sources/ippcp/pcpgfpec_addaffine.c')
| -rw-r--r-- | ext/ipp/sources/ippcp/pcpgfpec_addaffine.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/ext/ipp/sources/ippcp/pcpgfpec_addaffine.c b/ext/ipp/sources/ippcp/pcpgfpec_addaffine.c new file mode 100644 index 0000000..9cf5293 --- /dev/null +++ b/ext/ipp/sources/ippcp/pcpgfpec_addaffine.c @@ -0,0 +1,133 @@ +/******************************************************************************* +* Copyright 2010-2018 Intel Corporation +* All Rights Reserved. +* +* If this software was obtained under the Intel Simplified Software License, +* the following terms apply: +* +* The source code, information and material ("Material") contained herein is +* owned by Intel Corporation or its suppliers or licensors, and title to such +* Material remains with Intel Corporation or its suppliers or licensors. The +* Material contains proprietary information of Intel or its suppliers and +* licensors. The Material is protected by worldwide copyright laws and treaty +* provisions. No part of the Material may be used, copied, reproduced, +* modified, published, uploaded, posted, transmitted, distributed or disclosed +* in any way without Intel's prior express written permission. No license under +* any patent, copyright or other intellectual property rights in the Material +* is granted to or conferred upon you, either expressly, by implication, +* inducement, estoppel or otherwise. Any license under such intellectual +* property rights must be express and approved by Intel in writing. +* +* Unless otherwise agreed by Intel in writing, you may not remove or alter this +* notice or any other notice embedded in Materials by Intel or Intel's +* suppliers or licensors in any way. +* +* +* If this software was obtained under the Apache License, Version 2.0 (the +* "License"), the following terms apply: +* +* You may not use this file except in compliance with the License. You may +* obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 +* +* +* Unless required by applicable law or agreed to in writing, software +* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +* +* See the License for the specific language governing permissions and +* limitations under the License. +*******************************************************************************/ + +/* +// +// Purpose: +// Intel(R) Integrated Performance Primitives. Cryptography Primitives. +// Internal EC over GF(p^m) basic Definitions & Function Prototypes +// +// Context: +// gfec_affine_point_add() +// +*/ + +#include "owndefs.h" +#include "owncp.h" +#include "pcpgfpecstuff.h" +#include "pcpmask_ct.h" + + +#if ( ECP_PROJECTIVE_COORD == JACOBIAN ) +/* +// complexity = 3s+8m +*/ +void gfec_affine_point_add(BNU_CHUNK_T* pRdata, const BNU_CHUNK_T* pPdata, const BNU_CHUNK_T* pAdata, IppsGFpECState* pEC) +{ + IppsGFpState* pGF = ECP_GFP(pEC); + gsModEngine* pGFE = GFP_PMA(pGF); + int elemLen = GFP_FELEN(pGFE); + + mod_sub sub = GFP_METHOD(pGFE)->sub; /* gf sub */ + mod_mul2 mul2= GFP_METHOD(pGFE)->mul2; /* gf mul2 */ + mod_mul mul = GFP_METHOD(pGFE)->mul; /* gf mul */ + mod_sqr sqr = GFP_METHOD(pGFE)->sqr; /* gf sqr */ + + BNU_CHUNK_T* mont1 = GFP_MNT_R(pGFE); + + /* coordinates of projective P point */ + const BNU_CHUNK_T* px = pPdata; /* x1 */ + const BNU_CHUNK_T* py = pPdata+elemLen; /* y1 */ + const BNU_CHUNK_T* pz = pPdata+2*elemLen; /* z1 */ + + /* coordinates of affine A point, az==mont(1) */ + const BNU_CHUNK_T* ax = pAdata; /* x2 */ + const BNU_CHUNK_T* ay = pAdata+elemLen; /* y2 */ + + BNU_CHUNK_T inftyP = GFPE_IS_ZERO_CT(px, elemLen) & GFPE_IS_ZERO_CT(py, elemLen); + BNU_CHUNK_T inftyA = GFPE_IS_ZERO_CT(ax, elemLen) & GFPE_IS_ZERO_CT(ay, elemLen); + + /* get temporary from top of EC point pool */ + BNU_CHUNK_T* U2 = pEC->pPool; + BNU_CHUNK_T* S2 = U2 + elemLen; + BNU_CHUNK_T* H = S2 + elemLen; + BNU_CHUNK_T* R = H + elemLen; + + BNU_CHUNK_T* pRx = R + elemLen; /* temporary result */ + BNU_CHUNK_T* pRy = pRx+ elemLen; + BNU_CHUNK_T* pRz = pRy+ elemLen; + + sqr(R, pz, pGFE); // R = Z1^2 + mul(S2, ay, pz, pGFE); // S2 = Y2*Z1 + mul(U2, ax, R, pGFE); // U2 = X2*Z1^2 + mul(S2, S2, R, pGFE); // S2 = Y2*Z1^3 + + sub(H, U2, px, pGFE); // H = U2-X1 + sub(R, S2, py, pGFE); // R = S2-Y1 + + mul(pRz, H, pz, pGFE); // Z3 = H*Z1 + + sqr(U2, H, pGFE); // U2 = H^2 + sqr(S2, R, pGFE); // S2 = R^2 + mul(H, H, U2, pGFE); // H = H^3 + + mul(U2, U2, px, pGFE); // U2 = X1*H^2 + + mul(pRy, H, py, pGFE); // T = Y1*H^3 + + mul2(pRx, U2, pGFE); // X3 = 2*X1*H^2 + sub(pRx, S2, pRx, pGFE); // X3 = R^2 - 2*X1*H^2 + sub(pRx, pRx, H, pGFE); // X3 = R^2 - 2*X1*H^2 -H^3 + + sub(U2, U2, pRx, pGFE); // U2 = X1*H^2 - X3 + mul(U2, U2, R, pGFE); // U2 = R*(X1*H^2 - X3) + sub(pRy, U2, pRy, pGFE); // Y3 = -Y1*H^3 + R*(X1*H^2 - X3) + + cpMaskedReplace_ct(pRx, ax, elemLen, inftyP); + cpMaskedReplace_ct(pRy, ay, elemLen, inftyP); + cpMaskedReplace_ct(pRz, mont1, elemLen, inftyP); + cpMaskedReplace_ct(pRz, ax, elemLen, inftyP&inftyA); + + cpMaskedReplace_ct(pRx, px, elemLen*3, inftyA); + + cpGFpElementCopy(pRdata, pRx, 3*elemLen); +} +#endif + |