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
|
/*
main * lib/crypto/t_encrypt.c
*
* Copyright 2001, 2008by 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.
*
*
* <<< Description >>>
*/
/*
* Some black-box tests of crypto systems. Make sure that we can decrypt things we encrypt, etc.
*/
#include "k5-int.h"
#include "etypes.h"
#include <stdio.h>
/* What enctypes should we test?*/
krb5_enctype interesting_enctypes[] = {
ENCTYPE_DES_CBC_CRC,
ENCTYPE_DES_CBC_MD4,
ENCTYPE_DES_CBC_MD5,
ENCTYPE_DES3_CBC_SHA1,
ENCTYPE_ARCFOUR_HMAC,
ENCTYPE_ARCFOUR_HMAC_EXP,
ENCTYPE_AES256_CTS_HMAC_SHA1_96,
ENCTYPE_AES128_CTS_HMAC_SHA1_96,
0
};
#define test(msg, exp) \
printf ("%s: . . . ", msg); \
retval = (exp);\
if( retval) { \
printf( "Failed: %s\n", error_message(retval)); \
abort(); \
} else printf ("OK\n");
static int compare_results(krb5_data *d1, krb5_data *d2)
{
if (d1->length != d2->length) {
/* Decryption can leave a little trailing cruft.
For the current cryptosystems, this can be up to 7 bytes. */
if (d1->length + 8 <= d2->length)
return EINVAL;
if (d1->length > d2->length)
return EINVAL;
}
if (memcmp(d1->data, d2->data, d1->length)) {
return EINVAL;
}
return 0;
}
int
main ()
{
krb5_context context = 0;
krb5_data in, in2, out, out2, check, check2, state;
krb5_crypto_iov iov[5];
int i;
size_t len;
krb5_enc_data enc_out, enc_out2;
krb5_error_code retval;
krb5_keyblock *key;
memset(iov, 0, sizeof(iov));
in.data = "This is a test.\n";
in.length = strlen (in.data);
in2.data = "This is another test.\n";
in2.length = strlen (in2.data);
test ("Seeding random number generator",
krb5_c_random_seed (context, &in));
out.data = malloc(2048);
out2.data = malloc(2048);
check.data = malloc(2048);
check2.data = malloc(2048);
if (out.data == NULL || out2.data == NULL
|| check.data == NULL || check2.data == NULL)
abort();
out.length = 2048;
out2.length = 2048;
check.length = 2048;
check2.length = 2048;
for (i = 0; interesting_enctypes[i]; i++) {
krb5_enctype enctype = interesting_enctypes [i];
printf ("Testing enctype %d\n", enctype);
test ("Initializing a keyblock",
krb5_init_keyblock (context, enctype, 0, &key));
test ("Generating random key",
krb5_c_make_random_key (context, enctype, key));
enc_out.ciphertext = out;
enc_out2.ciphertext = out2;
/* We use an intermediate `len' because size_t may be different size
than `int' */
krb5_c_encrypt_length (context, key->enctype, in.length, &len);
enc_out.ciphertext.length = len;
test ("Encrypting",
krb5_c_encrypt (context, key, 7, 0, &in, &enc_out));
test ("Decrypting",
krb5_c_decrypt (context, key, 7, 0, &enc_out, &check));
test ("Comparing", compare_results (&in, &check));
if ( krb5_c_crypto_length(context, key->enctype, KRB5_CRYPTO_TYPE_HEADER, &len) == 0 ){
/* We support iov/aead*/
int j, pos;
krb5_data signdata;
signdata.data = (char *) "This should be signed";
signdata.length = strlen(signdata.data);
iov[0].flags= KRB5_CRYPTO_TYPE_STREAM;
iov[1].flags = KRB5_CRYPTO_TYPE_DATA;
iov[0].data = enc_out.ciphertext;
iov[1].data = out;
test("IOV stream decrypting",
krb5_c_decrypt_iov( context, key, 7, 0, iov, 2));
test("Comparing results",
compare_results(&in, &iov[1].data));
iov[0].flags = KRB5_CRYPTO_TYPE_HEADER;
iov[1].flags = KRB5_CRYPTO_TYPE_DATA;
iov[1].data = in; /*We'll need to copy memory before encrypt*/
iov[2].flags = KRB5_CRYPTO_TYPE_SIGN_ONLY;
iov[2].data = signdata;
iov[3].flags = KRB5_CRYPTO_TYPE_PADDING;
iov[4].flags = KRB5_CRYPTO_TYPE_TRAILER;
test("Setting up iov lengths",
krb5_c_crypto_length_iov(context, key->enctype, iov, 5));
for (j=0,pos=0; j <= 4; j++ ){
if (iov[j].flags == KRB5_CRYPTO_TYPE_SIGN_ONLY)
continue;
iov[j].data.data = &out.data[pos];
pos += iov[j].data.length;
}
assert (iov[1].data.length == in.length);
memcpy(iov[1].data.data, in.data, in.length);
test("iov encrypting",
krb5_c_encrypt_iov(context, key, 7, 0, iov, 5));
assert(iov[1].data.length == in.length);
test("iov decrypting",
krb5_c_decrypt_iov(context, key, 7, 0, iov, 5));
test("Comparing results",
compare_results(&in, &iov[1].data));
}
enc_out.ciphertext.length = out.length;
check.length = 2048;
test ("init_state",
krb5_c_init_state (context, key, 7, &state));
test ("Encrypting with state",
krb5_c_encrypt (context, key, 7, &state, &in, &enc_out));
test ("Encrypting again with state",
krb5_c_encrypt (context, key, 7, &state, &in2, &enc_out2));
test ("free_state",
krb5_c_free_state (context, key, &state));
test ("init_state",
krb5_c_init_state (context, key, 7, &state));
test ("Decrypting with state",
krb5_c_decrypt (context, key, 7, &state, &enc_out, &check));
test ("Decrypting again with state",
krb5_c_decrypt (context, key, 7, &state, &enc_out2, &check2));
test ("free_state",
krb5_c_free_state (context, key, &state));
test ("Comparing",
compare_results (&in, &check));
test ("Comparing",
compare_results (&in2, &check2));
krb5_free_keyblock (context, key);
}
free(out.data);
free(out2.data);
free(check.data);
free(check2.data);
return 0;
}
|
