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Diffstat (limited to 'ext/ipp/sources/ippcp/pcpgfpec_dblpoint.c')
| -rw-r--r-- | ext/ipp/sources/ippcp/pcpgfpec_dblpoint.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/ext/ipp/sources/ippcp/pcpgfpec_dblpoint.c b/ext/ipp/sources/ippcp/pcpgfpec_dblpoint.c new file mode 100644 index 0000000..7cf8611 --- /dev/null +++ b/ext/ipp/sources/ippcp/pcpgfpec_dblpoint.c @@ -0,0 +1,134 @@ +/******************************************************************************* +* 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_point_double() +// +*/ + +#include "owndefs.h" +#include "owncp.h" +#include "pcpgfpecstuff.h" +#include "gsscramble.h" + + + +#if ( ECP_PROJECTIVE_COORD == JACOBIAN ) +/* +// A = 4*x*y^2 +// B = 3*x^2 + a*z^4 +// +// x3 = -2*A + B^2 +// y3 = -8y^4 +B*(A-x3) +// z3 = 2*y*z +// +// complexity: = 4s+4m (NIST's, SM2 curves) +// = (EPID2 curve) +// = 6s+4m (arbitrary curves) +*/ +void gfec_point_double(BNU_CHUNK_T* pRdata, const BNU_CHUNK_T* pPdata, IppsGFpECState* pEC) +{ + IppsGFpState* pGF = ECP_GFP(pEC); + gsModEngine* pGFE = GFP_PMA(pGF); + int elemLen = GFP_FELEN(pGFE); + + mod_add add = GFP_METHOD(pGFE)->add; /* gf add */ + mod_sub sub = GFP_METHOD(pGFE)->sub; /* gf sub */ + mod_div2 div2= GFP_METHOD(pGFE)->div2; /* gf div2 */ + mod_mul2 mul2= GFP_METHOD(pGFE)->mul2; /* gf mul2 */ + mod_mul3 mul3= GFP_METHOD(pGFE)->mul3; /* gf mul3 */ + mod_mul mul = GFP_METHOD(pGFE)->mul; /* gf mul */ + mod_sqr sqr = GFP_METHOD(pGFE)->sqr; /* gf sqr */ + + const BNU_CHUNK_T* pX = pPdata; + const BNU_CHUNK_T* pY = pPdata+elemLen; + const BNU_CHUNK_T* pZ = pPdata+2*+elemLen; + + BNU_CHUNK_T* rX = pRdata; + BNU_CHUNK_T* rY = pRdata+elemLen; + BNU_CHUNK_T* rZ = pRdata+2*elemLen; + + /* get temporary from top of EC point pool */ + BNU_CHUNK_T* U = pEC->pPool; + BNU_CHUNK_T* M = U+elemLen; + BNU_CHUNK_T* S = M+elemLen; + + mul2(S, pY, pGFE); /* S = 2*Y */ + sqr(U, pZ, pGFE); /* U = Z^2 */ + + sqr(M, S, pGFE); /* M = 4*Y^2 */ + mul(rZ, S, pZ, pGFE); /* Zres = 2*Y*Z */ + + sqr(rY, M, pGFE); /* Yres = 16*Y^4 */ + + mul(S, M, pX, pGFE); /* S = 4*X*Y^2 */ + div2(rY, rY, pGFE); /* Yres = 8*Y^4 */ + + if(ECP_STD==ECP_SPECIFIC(pEC)) { + add(M, pX, U, pGFE); /* M = 3*(X^2-Z^4) */ + sub(U, pX, U, pGFE); + mul(M, M, U, pGFE); + mul3(M, M, pGFE); + } + else { + sqr(M, pX, pGFE); /* M = 3*X^2 */ + mul3(M, M, pGFE); + if(ECP_EPID2!=ECP_SPECIFIC(pEC)) { + sqr(U, U, pGFE); /* M = 3*X^2+a*Z4 */ + mul(U, U, ECP_A(pEC), pGFE); + add(M, M, U, pGFE); + } + } + + mul2(U, S, pGFE); /* U = 8*X*Y^2 */ + sqr(rX, M, pGFE); /* Xres = M^2 */ + sub(rX, rX, U, pGFE); /* Xres = M^2-U */ + + sub(S, S, rX, pGFE); /* S = 4*X*Y^2-Xres */ + mul(S, S, M, pGFE); /* S = M*(4*X*Y^2-Xres) */ + sub(rY, S, rY, pGFE); /* Yres = M*(4*X*Y^2-Xres) -8*Y^4 */ +} +#endif |