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
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
|
/*
* libcryptsetup - cryptsetup library, cipher bechmark
*
* Copyright (C) 2012, Red Hat, Inc. All rights reserved.
* Copyright (C) 2012, Milan Broz
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdlib.h>
#include <errno.h>
#include <sys/time.h>
#include <sys/resource.h>
#include "internal.h"
/*
* This is not simulating storage, so using disk block causes extreme overhead.
* Let's use some fixed block size where results are more reliable...
*/
#define CIPHER_BLOCK_BYTES 65536
/*
* The whole test depends on Linux kernel usermode crypto API for now.
* (The same implementations are used in dm-crypt though.)
*/
struct cipher_perf {
char name[32];
char mode[32];
char *key;
size_t key_length;
char *iv;
size_t iv_length;
size_t buffer_size;
};
static long time_ms(struct rusage *start, struct rusage *end)
{
long ms = 0;
/* For kernel backend, we need to measure only tim in kernel.
ms = (end->ru_utime.tv_sec - start->ru_utime.tv_sec) * 1000;
ms += (end->ru_utime.tv_usec - start->ru_utime.tv_usec) / 1000;
*/
ms += (end->ru_stime.tv_sec - start->ru_stime.tv_sec) * 1000;
ms += (end->ru_stime.tv_usec - start->ru_stime.tv_usec) / 1000;
return ms;
}
static int cipher_perf_one(struct cipher_perf *cp, char *buf,
size_t buf_size, int enc)
{
struct crypt_cipher *cipher = NULL;
size_t done = 0, block = CIPHER_BLOCK_BYTES;
int r;
if (buf_size < block)
block = buf_size;
r = crypt_cipher_init(&cipher, cp->name, cp->mode, cp->key, cp->key_length);
if (r < 0) {
log_dbg("Cannot initialise cipher %s, mode %s.", cp->name, cp->mode);
return r;
}
while (done < buf_size) {
if ((done + block) > buf_size)
block = buf_size - done;
if (enc)
r = crypt_cipher_encrypt(cipher, &buf[done], &buf[done],
block, cp->iv, cp->iv_length);
else
r = crypt_cipher_decrypt(cipher, &buf[done], &buf[done],
block, cp->iv, cp->iv_length);
if (r < 0)
break;
done += block;
}
crypt_cipher_destroy(cipher);
return r;
}
static long cipher_measure(struct cipher_perf *cp, char *buf,
size_t buf_size, int encrypt)
{
struct rusage rstart, rend;
int r;
if (getrusage(RUSAGE_SELF, &rstart) < 0)
return -EINVAL;
r = cipher_perf_one(cp, buf, buf_size, encrypt);
if (r < 0)
return r;
if (getrusage(RUSAGE_SELF, &rend) < 0)
return -EINVAL;
return time_ms(&rstart, &rend);
}
static double speed_mbs(unsigned long bytes, unsigned long ms)
{
double speed = bytes, s = ms / 1000.;
return speed / (1024 * 1024) / s;
}
static int cipher_perf(struct cipher_perf *cp,
double *encryption_mbs, double *decryption_mbs)
{
long ms_enc, ms_dec, ms;
int repeat_enc, repeat_dec;
void *buf = NULL;
if (posix_memalign(&buf, crypt_getpagesize(), cp->buffer_size))
return -ENOMEM;
ms_enc = 0;
repeat_enc = 1;
while (ms_enc < 1000) {
ms = cipher_measure(cp, buf, cp->buffer_size, 1);
if (ms < 0) {
free(buf);
return (int)ms;
}
ms_enc += ms;
repeat_enc++;
}
ms_dec = 0;
repeat_dec = 1;
while (ms_dec < 1000) {
ms = cipher_measure(cp, buf, cp->buffer_size, 0);
if (ms < 0) {
free(buf);
return (int)ms;
}
ms_dec += ms;
repeat_dec++;
}
free(buf);
*encryption_mbs = speed_mbs(cp->buffer_size * repeat_enc, ms_enc);
*decryption_mbs = speed_mbs(cp->buffer_size * repeat_dec, ms_dec);
return 0;
}
int crypt_benchmark(struct crypt_device *cd,
const char *cipher,
const char *cipher_mode,
size_t volume_key_size,
size_t iv_size,
size_t buffer_size,
double *encryption_mbs,
double *decryption_mbs)
{
struct cipher_perf cp = {
.key_length = volume_key_size,
.iv_length = iv_size,
.buffer_size = buffer_size,
};
char *c;
int r;
if (!cipher || !cipher_mode || !volume_key_size)
return -EINVAL;
r = init_crypto(cd);
if (r < 0)
return r;
r = -ENOMEM;
if (iv_size) {
cp.iv = malloc(iv_size);
if (!cp.iv)
goto out;
crypt_random_get(cd, cp.iv, iv_size, CRYPT_RND_NORMAL);
}
cp.key = malloc(volume_key_size);
if (!cp.key)
goto out;
crypt_random_get(cd, cp.key, volume_key_size, CRYPT_RND_NORMAL);
strncpy(cp.name, cipher, sizeof(cp.name)-1);
strncpy(cp.mode, cipher_mode, sizeof(cp.mode)-1);
/* Ignore IV generator */
if ((c = strchr(cp.mode, '-')))
*c = '\0';
r = cipher_perf(&cp, encryption_mbs, decryption_mbs);
out:
free(cp.key);
free(cp.iv);
return r;
}
int crypt_benchmark_kdf(struct crypt_device *cd,
const char *kdf,
const char *hash,
const char *password,
size_t password_size,
const char *salt,
size_t salt_size,
uint64_t *iterations_sec)
{
int r;
if (!iterations_sec)
return -EINVAL;
r = init_crypto(cd);
if (r < 0)
return r;
if (!strncmp(kdf, "pbkdf2", 6))
r = crypt_pbkdf_check(kdf, hash, password, password_size,
salt, salt_size, iterations_sec);
else
r = -EINVAL;
if (!r)
log_dbg("KDF %s, hash %s: %" PRIu64 " iterations per second.",
kdf, hash, *iterations_sec);
return r;
}
|
