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
|
/*******************************************************************************
* Copyright 2002-2018 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
// Cryptographic Primitives (ippcp)
//
// Contents:
// ippsMontForm()
//
*/
#include "owndefs.h"
#include "owncp.h"
#include "pcpbn.h"
#include "pcpmontgomery.h"
#include "pcptool.h"
/*F*
// Name: ippsMontForm
//
// Purpose: Converts input into Montgomery domain.
//
// Returns: Reason:
// ippStsNullPtrErr pCtx==NULL
// pA==NULL
// pR==NULL
// ippStsContextMatchErr !MNT_VALID_ID(pCtx)
// !BN_VALID_ID(pA)
// !BN_VALID_ID(pR)
// ippStsBadArgErr A < 0.
// ippStsScaleRangeErr A >= Modulus.
// ippStsOutOfRangeErr R can't hold result
// ippStsNoErr no errors
//
// Parameters:
// pA pointer to the input [0, modulus-1]
// pCtx Montgomery context
// pR pointer to the output (A*R mod modulus)
*F*/
IPPFUN(IppStatus, ippsMontForm,(const IppsBigNumState* pA, IppsMontState* pCtx, IppsBigNumState* pR))
{
IPP_BAD_PTR3_RET(pCtx, pA, pR);
pCtx = (IppsMontState*)(IPP_ALIGNED_PTR((pCtx), MONT_ALIGNMENT));
pA = (IppsBigNumState*)( IPP_ALIGNED_PTR(pA, BN_ALIGNMENT) );
pR = (IppsBigNumState*)( IPP_ALIGNED_PTR(pR, BN_ALIGNMENT) );
IPP_BADARG_RET(!MNT_VALID_ID(pCtx), ippStsContextMatchErr);
IPP_BADARG_RET(!BN_VALID_ID(pA), ippStsContextMatchErr);
IPP_BADARG_RET(!BN_VALID_ID(pR), ippStsContextMatchErr);
IPP_BADARG_RET(BN_SIGN(pA) != ippBigNumPOS, ippStsBadArgErr);
IPP_BADARG_RET(cpCmp_BNU(BN_NUMBER(pA), BN_SIZE(pA), MOD_MODULUS( MNT_ENGINE(pCtx) ), MOD_LEN( MNT_ENGINE(pCtx) )) >= 0, ippStsScaleRangeErr);
IPP_BADARG_RET(BN_ROOM(pR) < MOD_LEN( MNT_ENGINE(pCtx) ), ippStsOutOfRangeErr);
{
const int usedPoolLen = 1;
cpSize nsM = MOD_LEN( MNT_ENGINE(pCtx) );
BNU_CHUNK_T* pDataA = gsModPoolAlloc(MNT_ENGINE(pCtx), usedPoolLen);
//tbcd: temporary excluded: assert(NULL!=pDataA);
ZEXPAND_COPY_BNU(pDataA, nsM, BN_NUMBER(pA), BN_SIZE(pA));
MOD_METHOD( MNT_ENGINE(pCtx) )->encode(BN_NUMBER(pR), pDataA, MNT_ENGINE(pCtx));
FIX_BNU(BN_NUMBER(pR), nsM);
BN_SIZE(pR) = nsM;
BN_SIGN(pR) = ippBigNumPOS;
gsModPoolFree(MNT_ENGINE(pCtx), usedPoolLen);
}
return ippStsNoErr;
}
|
