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+/*******************************************************************************
+* Copyright 2016-2018 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.
+*******************************************************************************/
+
+/*
+// Intel(R) Integrated Performance Primitives. Cryptography Primitives.
+// GF(p) methods
+//
+*/
+#include "owndefs.h"
+#include "owncp.h"
+
+#include "pcpbnumisc.h"
+#include "gsmodstuff.h"
+#include "pcpgfpstuff.h"
+#include "pcpgfpmethod.h"
+#include "pcpbnuarith.h"
+#include "pcpecprime.h"
+
+//tbcd: temporary excluded: #include <assert.h>
+
+#if(_IPP >= _IPP_P8) || (_IPP32E >= _IPP32E_M7)
+
+#define p521r1_add OWNAPI(p521r1_add)
+#define p521r1_sub OWNAPI(p521r1_sub)
+#define p521r1_neg OWNAPI(p521r1_neg)
+#define p521r1_div_by_2 OWNAPI(p521r1_div_by_2)
+#define p521r1_mul_by_2 OWNAPI(p521r1_mul_by_2)
+#define p521r1_mul_by_3 OWNAPI(p521r1_mul_by_3)
+
+/* arithmetic over P-521r1 NIST modulus */
+BNU_CHUNK_T* p521r1_add(BNU_CHUNK_T* res, const BNU_CHUNK_T* a, const BNU_CHUNK_T* b, gsEngine* pGFE);
+BNU_CHUNK_T* p521r1_sub(BNU_CHUNK_T* res, const BNU_CHUNK_T* a, const BNU_CHUNK_T* b, gsEngine* pGFE);
+BNU_CHUNK_T* p521r1_neg(BNU_CHUNK_T* res, const BNU_CHUNK_T* a, gsEngine* pGFE);
+BNU_CHUNK_T* p521r1_div_by_2 (BNU_CHUNK_T* res, const BNU_CHUNK_T* a, gsEngine* pGFE);
+BNU_CHUNK_T* p521r1_mul_by_2 (BNU_CHUNK_T* res, const BNU_CHUNK_T* a, gsEngine* pGFE);
+BNU_CHUNK_T* p521r1_mul_by_3 (BNU_CHUNK_T* res, const BNU_CHUNK_T* a, gsEngine* pGFE);
+
+#if(_IPP_ARCH ==_IPP_ARCH_EM64T)
+
+//BNU_CHUNK_T* p521r1_to_mont (BNU_CHUNK_T* res, const BNU_CHUNK_T* a, gsEngine* pGFE);
+//BNU_CHUNK_T* p521r1_mont_back(BNU_CHUNK_T* res, const BNU_CHUNK_T* a, gsEngine* pGFE);
+//BNU_CHUNK_T* p521r1_mul_montl(BNU_CHUNK_T* res, const BNU_CHUNK_T* a, const BNU_CHUNK_T* b, gsEngine* pGFE);
+//BNU_CHUNK_T* p521r1_sqr_montl(BNU_CHUNK_T* res, const BNU_CHUNK_T* a, gsEngine* pGFE);
+//BNU_CHUNK_T* p521r1_mul_montx(BNU_CHUNK_T* res, const BNU_CHUNK_T* a, const BNU_CHUNK_T* b, gsEngine* pGFE);
+//BNU_CHUNK_T* p521r1_sqr_montx(BNU_CHUNK_T* res, const BNU_CHUNK_T* a, gsEngine* pGFE);
+#endif
+
+#define p521r1_mred OWNAPI(p521r1_mred)
+BNU_CHUNK_T* p521r1_mred(BNU_CHUNK_T* res, BNU_CHUNK_T* product);
+
+#if(_IPP_ARCH ==_IPP_ARCH_IA32)
+#define p521r1_mul_mont_slm OWNAPI(p521r1_mul_mont_slm)
+#define p521r1_sqr_mont_slm OWNAPI(p521r1_sqr_mont_slm)
+
+BNU_CHUNK_T* p521r1_mul_mont_slm(BNU_CHUNK_T* res, const BNU_CHUNK_T* a, const BNU_CHUNK_T* b, gsEngine* pGFE);
+BNU_CHUNK_T* p521r1_sqr_mont_slm(BNU_CHUNK_T* res, const BNU_CHUNK_T* a, gsEngine* pGFE);
+#endif
+
+#define OPERAND_BITSIZE (521)
+#define LEN_P521 (BITS_BNU_CHUNK(OPERAND_BITSIZE))
+
+
+/*
+// multiplicative methods
+*/
+static BNU_CHUNK_T* p521r1_mul_montl(BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, const BNU_CHUNK_T* pB, gsEngine* pGFE)
+{
+ BNU_CHUNK_T* product = cpGFpGetPool(2, pGFE);
+ //tbcd: temporary excluded: assert(NULL!=product);
+
+ cpMul_BNU_school(product, pA,LEN_P521, pB,LEN_P521);
+ p521r1_mred(pR, product);
+
+ cpGFpReleasePool(2, pGFE);
+ return pR;
+}
+
+static BNU_CHUNK_T* p521r1_sqr_montl(BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, gsEngine* pGFE)
+{
+ BNU_CHUNK_T* product = cpGFpGetPool(2, pGFE);
+ //tbcd: temporary excluded: assert(NULL!=product);
+
+ cpSqr_BNU_school(product, pA,LEN_P521);
+ p521r1_mred(pR, product);
+
+ cpGFpReleasePool(2, pGFE);
+ return pR;
+}
+
+
+/*
+// Montgomery domain conversion constants
+*/
+static BNU_CHUNK_T RR[] = {
+#if(_IPP_ARCH == _IPP_ARCH_EM64T)
+ 0x0000000000000000,0x0000400000000000,0x0000000000000000,
+ 0x0000000000000000,0x0000000000000000,0x0000000000000000,
+ 0x0000000000000000,0x0000000000000000,0x0000000000000000};
+#elif(_IPP_ARCH == _IPP_ARCH_IA32)
+ 0x00000000,0x00004000,0x00000000,0x00000000,0x00000000,0x00000000,
+ 0x00000000,0x00000000,0x00000000,0x00000000,0x00000000,0x00000000,
+ 0x00000000,0x00000000,0x00000000,0x00000000,0x00000000};
+#endif
+
+static BNU_CHUNK_T one[] = {
+#if(_IPP_ARCH == _IPP_ARCH_EM64T)
+ 1,0,0,0,0,0,0,0,0};
+#elif(_IPP_ARCH == _IPP_ARCH_IA32)
+ 1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
+#endif
+
+static BNU_CHUNK_T* p521r1_to_mont(BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, gsEngine* pGFE)
+{
+ return p521r1_mul_montl(pR, pA, (BNU_CHUNK_T*)RR, pGFE);
+}
+
+static BNU_CHUNK_T* p521r1_mont_back(BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, gsEngine* pGFE)
+{
+ return p521r1_mul_montl(pR, pA, (BNU_CHUNK_T*)one, pGFE);
+}
+
+#if (_ADCOX_NI_ENABLING_==_FEATURE_ON_) || (_ADCOX_NI_ENABLING_==_FEATURE_TICKTOCK_)
+//BNU_CHUNK_T* p521r1_mul_montx(BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, const BNU_CHUNK_T* pB, gsEngine* pGFE)
+//BNU_CHUNK_T* p521r1_sqr_montx(BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, const BNU_CHUNK_T* pB, gsEngine* pGFE)
+#endif
+
+#if(_IPP_ARCH ==_IPP_ARCH_IA32)
+static BNU_CHUNK_T* p521r1_to_mont_slm(BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, gsEngine* pGFE)
+{
+ return p521r1_mul_mont_slm(pR, pA, (BNU_CHUNK_T*)RR, pGFE);
+}
+
+static BNU_CHUNK_T* p521r1_mont_back_slm(BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, gsEngine* pGFE)
+{
+ return p521r1_mul_mont_slm(pR, pA, (BNU_CHUNK_T*)one, pGFE);
+}
+#endif /* _IPP_ARCH ==_IPP_ARCH_IA32*/
+
+/*
+// return specific gf p521r1 arith methods,
+// p521r1 = 2^521 -1 (NIST P521r1)
+*/
+static gsModMethod* gsArithGF_p521r1(void)
+{
+ static gsModMethod m = {
+ p521r1_to_mont,
+ p521r1_mont_back,
+ p521r1_mul_montl,
+ p521r1_sqr_montl,
+ NULL,
+ p521r1_add,
+ p521r1_sub,
+ p521r1_neg,
+ p521r1_div_by_2,
+ p521r1_mul_by_2,
+ p521r1_mul_by_3,
+ };
+
+ #if(_IPP_ARCH==_IPP_ARCH_IA32)
+ if(IsFeatureEnabled(ippCPUID_SSSE3|ippCPUID_MOVBE) && !IsFeatureEnabled(ippCPUID_AVX)) {
+ m.mul = p521r1_mul_mont_slm;
+ m.sqr = p521r1_sqr_mont_slm;
+ m.encode = p521r1_to_mont_slm;
+ m.decode = p521r1_mont_back_slm;
+ }
+ #endif
+
+ return &m;
+}
+#endif /* (_IPP >= _IPP_P8) || (_IPP32E >= _IPP32E_M7) */
+
+/*F*
+// Name: ippsGFpMethod_p521r1
+//
+// Purpose: Returns a reference to an implementation of
+// arithmetic operations over GF(q).
+//
+// Returns: Pointer to a structure containing an implementation of arithmetic
+// operations over GF(q). q = 2^521 - 1
+*F*/
+
+IPPFUN( const IppsGFpMethod*, ippsGFpMethod_p521r1, (void) )
+{
+ static IppsGFpMethod method = {
+ cpID_PrimeP521r1,
+ 521,
+ secp521r1_p,
+ NULL
+ };
+
+ #if(_IPP >= _IPP_P8) || (_IPP32E >= _IPP32E_M7)
+ method.arith = gsArithGF_p521r1();
+ #else
+ method.arith = gsArithGFp();
+ #endif
+
+ return &method;
+}
+
+#undef LEN_P521
+#undef OPERAND_BITSIZE
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