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
|
/*******************************************************************************
* Copyright 2004-2018 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:
// Cryptography Primitive.
// PRNG Functions
//
// Contents:
// ippsPRNGen_BN()
//
*/
#include "owndefs.h"
#include "owncp.h"
#include "pcpbn.h"
#include "pcphash.h"
#include "pcpprng.h"
#include "pcptool.h"
/*F*
// Name: ippsPRNGen_BN
//
// Purpose: Generates a pseudorandom big number of the specified nBits length.
//
// Returns: Reason:
// ippStsNullPtrErr NULL == pCtx
// NULL == pRand
//
// ippStsContextMatchErr illegal pCtx->idCtx
// illegal pRand->idCtx
//
// ippStsLengthErr 1 > nBits
// nBits > BN_ROOM(pRand)
//
// ippStsNoErr no error
//
// Parameters:
// pRand pointer to the BN random
// nBits number of bits be requested
// pCtx pointer to the context
*F*/
IPPFUN(IppStatus, ippsPRNGen_BN,(IppsBigNumState* pRand, int nBits, void* pCtx))
{
IppsPRNGState* pRndCtx;
/* test PRNG context */
IPP_BAD_PTR1_RET(pCtx);
pRndCtx = (IppsPRNGState*)( IPP_ALIGNED_PTR(pCtx, PRNG_ALIGNMENT) );
IPP_BADARG_RET(!RAND_VALID_ID(pRndCtx), ippStsContextMatchErr);
/* test random BN */
IPP_BAD_PTR1_RET(pRand);
pRand = (IppsBigNumState*)( IPP_ALIGNED_PTR(pRand, BN_ALIGNMENT) );
IPP_BADARG_RET(!BN_VALID_ID(pRand), ippStsContextMatchErr);
/* test sizes */
IPP_BADARG_RET(nBits< 1, ippStsLengthErr);
IPP_BADARG_RET(nBits> BN_ROOM(pRand)*BNU_CHUNK_BITS, ippStsLengthErr);
{
BNU_CHUNK_T* pRandBN = BN_NUMBER(pRand);
cpSize rndSize = BITS_BNU_CHUNK(nBits);
BNU_CHUNK_T rndMask = MASK_BNU_CHUNK(nBits);
cpPRNGen((Ipp32u*)pRandBN, nBits, pRndCtx);
pRandBN[rndSize-1] &= rndMask;
FIX_BNU(pRandBN, rndSize);
BN_SIZE(pRand) = rndSize;
BN_SIGN(pRand) = ippBigNumPOS;
return ippStsNoErr;
}
}
|
