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
|
/*
* (C) 2014,2015 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include "tests.h"
#if defined(BOTAN_HAS_AEAD_OCB)
#if defined(BOTAN_HAS_AES)
#include <iostream>
#include <botan/ocb.h>
#include <botan/hex.h>
#include <botan/sha2_32.h>
#include <botan/aes.h>
#include <botan/loadstor.h>
#include <botan/lookup.h>
using namespace Botan;
namespace {
std::vector<byte> ocb_encrypt(OCB_Encryption& enc,
OCB_Decryption& dec,
const std::vector<byte>& nonce,
const std::vector<byte>& pt,
const std::vector<byte>& ad)
{
enc.set_associated_data(ad.data(), ad.size());
enc.start(nonce.data(), nonce.size());
secure_vector<byte> buf(pt.begin(), pt.end());
enc.finish(buf, 0);
try
{
secure_vector<byte> ct = buf;
dec.set_associated_data(ad.data(), ad.size());
dec.start(nonce.data(), nonce.size());
dec.finish(ct, 0);
if(ct != pt)
std::cout << "OCB failed to decrypt correctly" << std::endl;
}
catch(std::exception& e)
{
std::cout << "OCB round trip error - " << e.what() << std::endl;
}
return unlock(buf);
}
size_t test_ocb_long(size_t keylen, size_t taglen,
const std::string &expected)
{
// Test from RFC 7253 Appendix A
const std::string algo = "AES-" + std::to_string(keylen);
OCB_Encryption enc(get_block_cipher(algo), taglen / 8);
OCB_Decryption dec(get_block_cipher(algo), taglen / 8);
std::vector<byte> key(keylen/8);
key[keylen/8-1] = taglen;
enc.set_key(key);
dec.set_key(key);
const std::vector<byte> empty;
std::vector<byte> N(12);
std::vector<byte> C;
for(size_t i = 0; i != 128; ++i)
{
const std::vector<byte> S(i);
store_be(static_cast<u32bit>(3*i+1), &N[8]);
C += ocb_encrypt(enc, dec, N, S, S);
store_be(static_cast<u32bit>(3*i+2), &N[8]);
C += ocb_encrypt(enc, dec, N, S, empty);
store_be(static_cast<u32bit>(3*i+3), &N[8]);
C += ocb_encrypt(enc, dec, N, empty, S);
}
store_be(static_cast<u32bit>(385), &N[8]);
const std::vector<byte> cipher = ocb_encrypt(enc, dec, N, empty, C);
const std::string cipher_hex = hex_encode(cipher);
if(cipher_hex != expected)
{
std::cout << "OCB " << algo << " long test mistmatch "
<< cipher_hex << " != " << expected << std::endl;
return 1;
}
return 0;
}
}
size_t test_ocb()
{
size_t fails = 0;
fails += test_ocb_long(128, 128, "67E944D23256C5E0B6C61FA22FDF1EA2");
fails += test_ocb_long(192, 128, "F673F2C3E7174AAE7BAE986CA9F29E17");
fails += test_ocb_long(256, 128, "D90EB8E9C977C88B79DD793D7FFA161C");
fails += test_ocb_long(128, 96, "77A3D8E73589158D25D01209");
fails += test_ocb_long(192, 96, "05D56EAD2752C86BE6932C5E");
fails += test_ocb_long(256, 96, "5458359AC23B0CBA9E6330DD");
fails += test_ocb_long(128, 64, "192C9B7BD90BA06A");
fails += test_ocb_long(192, 64, "0066BC6E0EF34E24");
fails += test_ocb_long(256, 64, "7D4EA5D445501CBE");
test_report("OCB long", 9, fails);
return fails;
}
#else
UNTESTED_WARNING(ocb);
#endif // BOTAN_HAS_AES
#else
SKIP_TEST(ocb);
#endif // BOTAN_HAS_AEAD_OCB
|
