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
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
/* misc.cpp
*
* Copyright (C) 2003 Sawtooth Consulting Ltd.
*
* This file is part of yaSSL.
*
* yaSSL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* yaSSL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
/* based on Wei Dai's misc.cpp from CryptoPP */
#include "runtime.hpp"
#include "misc.hpp"
#include <new> // for NewHandler
#ifdef YASSL_PURE_C
void* operator new(size_t sz, TaoCrypt::new_t)
{
void* ptr = malloc(sz ? sz : 1);
if (!ptr) abort();
return ptr;
}
void operator delete(void* ptr, TaoCrypt::new_t)
{
if (ptr) free(ptr);
}
void* operator new[](size_t sz, TaoCrypt::new_t nt)
{
return ::operator new(sz, nt);
}
void operator delete[](void* ptr, TaoCrypt::new_t nt)
{
::operator delete(ptr, nt);
}
/* uncomment to test
// make sure not using globals anywhere by forgetting to use overloaded
void* operator new(size_t sz);
void operator delete(void* ptr);
void* operator new[](size_t sz);
void operator delete[](void* ptr);
*/
namespace TaoCrypt {
new_t tc; // for library new
}
#endif // YASSL_PURE_C
namespace TaoCrypt {
inline void XorWords(word* r, const word* a, unsigned int n)
{
for (unsigned int i=0; i<n; i++)
r[i] ^= a[i];
}
void xorbuf(byte* buf, const byte* mask, unsigned int count)
{
if (((size_t)buf | (size_t)mask | count) % WORD_SIZE == 0)
XorWords((word *)buf, (const word *)mask, count/WORD_SIZE);
else
{
for (unsigned int i=0; i<count; i++)
buf[i] ^= mask[i];
}
}
unsigned int BytePrecision(unsigned long value)
{
unsigned int i;
for (i=sizeof(value); i; --i)
if (value >> (i-1)*8)
break;
return i;
}
unsigned int BitPrecision(unsigned long value)
{
if (!value)
return 0;
unsigned int l = 0,
h = 8 * sizeof(value);
while (h-l > 1)
{
unsigned int t = (l+h)/2;
if (value >> t)
l = t;
else
h = t;
}
return h;
}
unsigned long Crop(unsigned long value, unsigned int size)
{
if (size < 8*sizeof(value))
return (value & ((1L << size) - 1));
else
return value;
}
} // namespace
|
