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
|
/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/* lib/crypto/crypto_tests/t_kperf.c */
/*
* Copyright (C) 2009 by the Massachusetts Institute of Technology.
* All rights reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*/
/*
* This file contains a harness to measure the performance improvement
* of using the the krb5_k functions (which cache derived keys) over
* the equivalent krb5_c functions which do not. Sample usages:
*
* ./t_kperf ce aes128-cts 10 100000
* ./t_kperf kv aes256-cts 1024 10000
*
* The first usage encrypts ('e') a hundred thousand ten-byte blobs
* with aes128-cts, using the non-caching APIs ('c'). The second
* usage verifies ('v') ten thousand checksums over 1K blobs with the
* first available keyed checksum type for aes256-cts, using the
* caching APIs ('k'). Run commands under "time" to measure how much
* time is used by the operations.
*/
#include "k5-int.h"
int
main(int argc, char **argv)
{
krb5_keyblock kblock;
krb5_key key;
krb5_enctype enctype;
krb5_cksumtype cktype;
int blocksize, num_blocks, intf, op, i;
size_t outlen, cklen;
krb5_data block;
krb5_enc_data outblock;
krb5_checksum sum;
krb5_boolean val;
if (argc != 5) {
fprintf(stderr, "Usage: t_kperf {c|k}{e|d|m|v} type size nblocks\n");
exit(1);
}
intf = argv[1][0];
assert(intf == 'c' || intf =='k');
op = argv[1][1];
assert(krb5_string_to_enctype(argv[2], &enctype) == 0);
blocksize = atoi(argv[3]);
num_blocks = atoi(argv[4]);
block.data = "notrandom";
block.length = 9;
krb5_c_random_seed(NULL, &block);
krb5_c_make_random_key(NULL, enctype, &kblock);
krb5_k_create_key(NULL, &kblock, &key);
block.length = blocksize;
block.data = calloc(1, blocksize);
krb5_c_encrypt_length(NULL, enctype, blocksize, &outlen);
outblock.enctype = enctype;
outblock.ciphertext.length = outlen;
outblock.ciphertext.data = calloc(1, outlen);
krb5int_c_mandatory_cksumtype(NULL, enctype, &cktype);
krb5_c_checksum_length(NULL, cktype, &cklen);
sum.checksum_type = cktype;
sum.length = cklen;
sum.contents = calloc(1, cklen);
/*
* Decrypting typically involves copying the output after checking the
* hash, so we need to create a valid ciphertext to correctly measure its
* performance.
*/
if (op == 'd')
krb5_c_encrypt(NULL, &kblock, 0, NULL, &block, &outblock);
for (i = 0; i < num_blocks; i++) {
if (intf == 'c') {
if (op == 'e')
krb5_c_encrypt(NULL, &kblock, 0, NULL, &block, &outblock);
else if (op == 'd')
krb5_c_decrypt(NULL, &kblock, 0, NULL, &outblock, &block);
else if (op == 'm')
krb5_c_make_checksum(NULL, cktype, &kblock, 0, &block, &sum);
else if (op == 'v')
krb5_c_verify_checksum(NULL, &kblock, 0, &block, &sum, &val);
} else {
if (op == 'e')
krb5_k_encrypt(NULL, key, 0, NULL, &block, &outblock);
else if (op == 'd')
krb5_k_decrypt(NULL, key, 0, NULL, &outblock, &block);
else if (op == 'm')
krb5_k_make_checksum(NULL, cktype, key, 0, &block, &sum);
else if (op == 'v')
krb5_k_verify_checksum(NULL, key, 0, &block, &sum, &val);
}
}
return 0;
}
|
