blob: 1c465f43ebb31eb67bb4047847ce329f9120a6aa (
plain)
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
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
// misc.cpp - written and placed in the public domain by Wei Dai
#include "pch.h"
#include "config.h"
#if CRYPTOPP_MSC_VERSION
# pragma warning(disable: 4189)
# if (CRYPTOPP_MSC_VERSION >= 1400)
# pragma warning(disable: 6237)
# endif
#endif
#ifndef CRYPTOPP_IMPORTS
#include "misc.h"
#include "words.h"
#include "words.h"
#include "stdcpp.h"
#include "integer.h"
// for memalign
#if defined(CRYPTOPP_MEMALIGN_AVAILABLE) || defined(CRYPTOPP_MM_MALLOC_AVAILABLE) || defined(QNX)
# include <malloc.h>
#endif
NAMESPACE_BEGIN(CryptoPP)
void xorbuf(byte *buf, const byte *mask, size_t count)
{
assert(buf != NULL);
assert(mask != NULL);
assert(count > 0);
size_t i=0;
if (IsAligned<word32>(buf) && IsAligned<word32>(mask))
{
if (!CRYPTOPP_BOOL_SLOW_WORD64 && IsAligned<word64>(buf) && IsAligned<word64>(mask))
{
for (i=0; i<count/8; i++)
((word64*)buf)[i] ^= ((word64*)mask)[i];
count -= 8*i;
if (!count)
return;
buf += 8*i;
mask += 8*i;
}
for (i=0; i<count/4; i++)
((word32*)buf)[i] ^= ((word32*)mask)[i];
count -= 4*i;
if (!count)
return;
buf += 4*i;
mask += 4*i;
}
for (i=0; i<count; i++)
buf[i] ^= mask[i];
}
void xorbuf(byte *output, const byte *input, const byte *mask, size_t count)
{
assert(output != NULL);
assert(input != NULL);
assert(count > 0);
size_t i=0;
if (IsAligned<word32>(output) && IsAligned<word32>(input) && IsAligned<word32>(mask))
{
if (!CRYPTOPP_BOOL_SLOW_WORD64 && IsAligned<word64>(output) && IsAligned<word64>(input) && IsAligned<word64>(mask))
{
for (i=0; i<count/8; i++)
((word64*)output)[i] = ((word64*)input)[i] ^ ((word64*)mask)[i];
count -= 8*i;
if (!count)
return;
output += 8*i;
input += 8*i;
mask += 8*i;
}
for (i=0; i<count/4; i++)
((word32*)output)[i] = ((word32*)input)[i] ^ ((word32*)mask)[i];
count -= 4*i;
if (!count)
return;
output += 4*i;
input += 4*i;
mask += 4*i;
}
for (i=0; i<count; i++)
output[i] = input[i] ^ mask[i];
}
bool VerifyBufsEqual(const byte *buf, const byte *mask, size_t count)
{
assert(buf != NULL);
assert(mask != NULL);
assert(count > 0);
size_t i=0;
byte acc8 = 0;
if (IsAligned<word32>(buf) && IsAligned<word32>(mask))
{
word32 acc32 = 0;
if (!CRYPTOPP_BOOL_SLOW_WORD64 && IsAligned<word64>(buf) && IsAligned<word64>(mask))
{
word64 acc64 = 0;
for (i=0; i<count/8; i++)
acc64 |= ((word64*)buf)[i] ^ ((word64*)mask)[i];
count -= 8*i;
if (!count)
return acc64 == 0;
buf += 8*i;
mask += 8*i;
acc32 = word32(acc64) | word32(acc64>>32);
}
for (i=0; i<count/4; i++)
acc32 |= ((word32*)buf)[i] ^ ((word32*)mask)[i];
count -= 4*i;
if (!count)
return acc32 == 0;
buf += 4*i;
mask += 4*i;
acc8 = byte(acc32) | byte(acc32>>8) | byte(acc32>>16) | byte(acc32>>24);
}
for (i=0; i<count; i++)
acc8 |= buf[i] ^ mask[i];
return acc8 == 0;
}
#if !(defined(_MSC_VER) && (_MSC_VER < 1300))
using std::new_handler;
using std::set_new_handler;
#endif
void CallNewHandler()
{
new_handler newHandler = set_new_handler(NULL);
if (newHandler)
set_new_handler(newHandler);
if (newHandler)
newHandler();
else
throw std::bad_alloc();
}
#if CRYPTOPP_BOOL_ALIGN16
void * AlignedAllocate(size_t size)
{
byte *p;
#if defined(CRYPTOPP_APPLE_ALLOC_AVAILABLE)
while ((p = (byte *)calloc(1, size)) == NULL)
#elif defined(CRYPTOPP_MM_MALLOC_AVAILABLE)
while ((p = (byte *)_mm_malloc(size, 16)) == NULL)
#elif defined(CRYPTOPP_MEMALIGN_AVAILABLE)
while ((p = (byte *)memalign(16, size)) == NULL)
#elif defined(CRYPTOPP_MALLOC_ALIGNMENT_IS_16)
while ((p = (byte *)malloc(size)) == NULL)
#else
while ((p = (byte *)malloc(size + 16)) == NULL)
#endif
CallNewHandler();
#ifdef CRYPTOPP_NO_ALIGNED_ALLOC
size_t adjustment = 16-((size_t)p%16);
p += adjustment;
p[-1] = (byte)adjustment;
#endif
assert(IsAlignedOn(p, 16));
return p;
}
void AlignedDeallocate(void *p)
{
#ifdef CRYPTOPP_MM_MALLOC_AVAILABLE
_mm_free(p);
#elif defined(CRYPTOPP_NO_ALIGNED_ALLOC)
p = (byte *)p - ((byte *)p)[-1];
free(p);
#else
free(p);
#endif
}
#endif
void * UnalignedAllocate(size_t size)
{
void *p;
while ((p = malloc(size)) == NULL)
CallNewHandler();
return p;
}
void UnalignedDeallocate(void *p)
{
free(p);
}
NAMESPACE_END
#endif
|
