1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
/*******************************************************************************
* 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.
// EC over GF(p) Operations
//
// Context:
// ippsGFpECMulPoint()
//
*/
#include "owndefs.h"
#include "owncp.h"
#include "pcpgfpecstuff.h"
/*F*
// Name: ippsGFpECMulPoint
//
// Purpose: Multiplies a point on an elliptic curve by a scalar
//
// Returns: Reason:
// ippStsNullPtrErr pP == NULL
// pQ == NULL
// pR == NULL
// pEC == NULL
//
// ippStsContextMatchErr invalid pEC->idCtx
// pEC->subgroup == NULL
// invalid pP->idCtx
// invalid pQ->idCtx
// invalid pR->idCtx
//
// ippStsOutOfRangeErr ECP_POINT_FELEN(pP)!=GFP_FELEN()
// ECP_POINT_FELEN(pR)!=GFP_FELEN()
//
// ippStsBadArgErr pN is negative
// pN > MOD_MODULUS(ECP_MONT_R(pEC))
//
// ippStsNoErr no error
//
// Parameters:
// pP Pointer to the context of the given point on the elliptic curve
// pN Pointer to the Big Number context storing the scalar value
// pR Pointer to the context of the resulting elliptic curve point
// pEC Pointer to the context of the elliptic curve
// pScratchBuffer Pointer to the scratch buffer
//
// Note:
// computes [N]*P, 0 < N < order
//
*F*/
IPPFUN(IppStatus, ippsGFpECMulPoint,(const IppsGFpECPoint* pP,
const IppsBigNumState* pN,
IppsGFpECPoint* pR,
IppsGFpECState* pEC,
Ipp8u* pScratchBuffer))
{
IPP_BAD_PTR4_RET(pP, pR, pEC, pScratchBuffer);
pEC = (IppsGFpECState*)( IPP_ALIGNED_PTR(pEC, ECGFP_ALIGNMENT) );
IPP_BADARG_RET( !ECP_TEST_ID(pEC), ippStsContextMatchErr );
IPP_BADARG_RET(!ECP_SUBGROUP(pEC), ippStsContextMatchErr);
IPP_BADARG_RET( !ECP_POINT_TEST_ID(pP), ippStsContextMatchErr );
IPP_BADARG_RET( !ECP_POINT_TEST_ID(pR), ippStsContextMatchErr );
IPP_BADARG_RET( ECP_POINT_FELEN(pP)!=GFP_FELEN(GFP_PMA(ECP_GFP(pEC))), ippStsOutOfRangeErr);
IPP_BADARG_RET( ECP_POINT_FELEN(pR)!=GFP_FELEN(GFP_PMA(ECP_GFP(pEC))), ippStsOutOfRangeErr);
IPP_BAD_PTR1_RET(pN);
pN = (IppsBigNumState*)( IPP_ALIGNED_PTR(pN, BN_ALIGNMENT) );
IPP_BADARG_RET(!BN_VALID_ID(pN), ippStsContextMatchErr );
IPP_BADARG_RET( BN_NEGATIVE(pN), ippStsBadArgErr );
{
BNU_CHUNK_T* pScalar = BN_NUMBER(pN);
int scalarLen = BN_SIZE(pN);
IPP_BADARG_RET(0<cpCmp_BNU(pScalar, scalarLen, MOD_MODULUS(ECP_MONT_R(pEC)), MOD_LEN(ECP_MONT_R(pEC))), ippStsBadArgErr);
gfec_MulPoint(pR, pP, pScalar, scalarLen, pEC, pScratchBuffer);
return ippStsNoErr;
}
}
|
