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
|
/* BEGIN_HEADER */
#include "lmots.h"
#include "mbedtls/lms.h"
#if defined(MBEDTLS_TEST_HOOKS)
int check_lmots_private_key_for_leak(unsigned char *sig)
{
size_t idx;
for (idx = MBEDTLS_LMOTS_SIG_SIGNATURE_OFFSET(MBEDTLS_LMOTS_SHA256_N32_W8);
idx < MBEDTLS_LMOTS_SIG_LEN(MBEDTLS_LMOTS_SHA256_N32_W8);
idx++) {
TEST_EQUAL(sig[idx], 0x7E);
}
return 0;
exit:
return -1;
}
#endif /* defined(MBEDTLS_TEST_HOOKS) */
/* END_HEADER */
/* BEGIN_DEPENDENCIES
* depends_on:MBEDTLS_LMS_C
* END_DEPENDENCIES
*/
/* BEGIN_CASE depends_on:MBEDTLS_LMS_PRIVATE */
void lmots_sign_verify_test(data_t *msg, data_t *key_id, int leaf_id,
data_t *seed)
{
mbedtls_lmots_public_t pub_ctx;
mbedtls_lmots_private_t priv_ctx;
unsigned char sig[MBEDTLS_LMOTS_SIG_LEN(MBEDTLS_LMOTS_SHA256_N32_W8)];
mbedtls_lmots_public_init(&pub_ctx);
mbedtls_lmots_private_init(&priv_ctx);
TEST_EQUAL(mbedtls_lmots_generate_private_key(&priv_ctx, MBEDTLS_LMOTS_SHA256_N32_W8,
key_id->x, leaf_id, seed->x, seed->len), 0);
TEST_EQUAL(mbedtls_lmots_calculate_public_key(&pub_ctx, &priv_ctx), 0);
TEST_EQUAL(mbedtls_lmots_sign(&priv_ctx, &mbedtls_test_rnd_std_rand, NULL,
msg->x, msg->len, sig, sizeof(sig), NULL), 0);
TEST_EQUAL(mbedtls_lmots_verify(&pub_ctx, msg->x, msg->len, sig, sizeof(sig)), 0);
exit:
mbedtls_lmots_public_free(&pub_ctx);
mbedtls_lmots_private_free(&priv_ctx);
}
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_LMS_PRIVATE */
void lmots_sign_verify_null_msg_test(data_t *key_id, int leaf_id, data_t *seed)
{
mbedtls_lmots_public_t pub_ctx;
mbedtls_lmots_private_t priv_ctx;
unsigned char sig[MBEDTLS_LMOTS_SIG_LEN(MBEDTLS_LMOTS_SHA256_N32_W8)];
mbedtls_lmots_public_init(&pub_ctx);
mbedtls_lmots_private_init(&priv_ctx);
TEST_EQUAL(mbedtls_lmots_generate_private_key(&priv_ctx, MBEDTLS_LMOTS_SHA256_N32_W8,
key_id->x, leaf_id, seed->x, seed->len), 0);
TEST_EQUAL(mbedtls_lmots_calculate_public_key(&pub_ctx, &priv_ctx), 0);
TEST_EQUAL(mbedtls_lmots_sign(&priv_ctx, &mbedtls_test_rnd_std_rand, NULL,
NULL, 0, sig, sizeof(sig), NULL), 0);
TEST_EQUAL(mbedtls_lmots_verify(&pub_ctx, NULL, 0, sig, sizeof(sig)), 0);
exit:
mbedtls_lmots_public_free(&pub_ctx);
mbedtls_lmots_private_free(&priv_ctx);
}
/* END_CASE */
/* BEGIN_CASE */
void lmots_verify_test(data_t *msg, data_t *sig, data_t *pub_key,
int expected_rc)
{
mbedtls_lmots_public_t ctx;
unsigned int size;
unsigned char *tmp_sig = NULL;
mbedtls_lmots_public_init(&ctx);
TEST_EQUAL(mbedtls_lmots_import_public_key(&ctx, pub_key->x, pub_key->len), 0);
TEST_EQUAL(mbedtls_lmots_verify(&ctx, msg->x, msg->len, sig->x, sig->len), expected_rc);
/* Test negative cases if the input data is valid */
if (expected_rc == 0) {
if (msg->len >= 1) {
/* Altering first message byte must cause verification failure */
msg->x[0] ^= 1;
TEST_EQUAL(mbedtls_lmots_verify(&ctx, msg->x, msg->len, sig->x, sig->len),
MBEDTLS_ERR_LMS_VERIFY_FAILED);
msg->x[0] ^= 1;
/* Altering last message byte must cause verification failure */
msg->x[msg->len - 1] ^= 1;
TEST_EQUAL(mbedtls_lmots_verify(&ctx, msg->x, msg->len, sig->x, sig->len),
MBEDTLS_ERR_LMS_VERIFY_FAILED);
msg->x[msg->len - 1] ^= 1;
}
/* Altering first signature byte must cause verification failure */
sig->x[0] ^= 1;
TEST_EQUAL(mbedtls_lmots_verify(&ctx, msg->x, msg->len, sig->x, sig->len),
MBEDTLS_ERR_LMS_VERIFY_FAILED);
sig->x[0] ^= 1;
/* Altering last signature byte must cause verification failure */
sig->x[sig->len - 1] ^= 1;
TEST_EQUAL(mbedtls_lmots_verify(&ctx, msg->x, msg->len, sig->x, sig->len),
MBEDTLS_ERR_LMS_VERIFY_FAILED);
sig->x[sig->len - 1] ^= 1;
/* Signatures of all sizes must not verify, whether shorter or longer */
for (size = 0; size < sig->len; size++) {
if (size == sig->len) {
continue;
}
TEST_CALLOC(tmp_sig, size);
if (tmp_sig != NULL) {
memcpy(tmp_sig, sig->x, MIN(size, sig->len));
}
TEST_EQUAL(mbedtls_lmots_verify(&ctx, msg->x, msg->len, tmp_sig, size),
MBEDTLS_ERR_LMS_VERIFY_FAILED);
mbedtls_free(tmp_sig);
tmp_sig = NULL;
}
}
exit:
mbedtls_free(tmp_sig);
mbedtls_lmots_public_free(&ctx);
}
/* END_CASE */
/* BEGIN_CASE */
void lmots_import_export_test(data_t *pub_key, int expected_import_rc)
{
mbedtls_lmots_public_t ctx;
unsigned char *exported_pub_key = NULL;
size_t exported_pub_key_buf_size;
size_t exported_pub_key_size;
mbedtls_lmots_public_init(&ctx);
TEST_EQUAL(mbedtls_lmots_import_public_key(&ctx, pub_key->x, pub_key->len),
expected_import_rc);
if (expected_import_rc == 0) {
exported_pub_key_buf_size = MBEDTLS_LMOTS_PUBLIC_KEY_LEN(MBEDTLS_LMOTS_SHA256_N32_W8);
TEST_CALLOC(exported_pub_key, exported_pub_key_buf_size);
TEST_EQUAL(mbedtls_lmots_export_public_key(&ctx, exported_pub_key,
exported_pub_key_buf_size,
&exported_pub_key_size), 0);
TEST_EQUAL(exported_pub_key_size,
MBEDTLS_LMOTS_PUBLIC_KEY_LEN(MBEDTLS_LMOTS_SHA256_N32_W8));
TEST_MEMORY_COMPARE(pub_key->x, pub_key->len,
exported_pub_key, exported_pub_key_size);
mbedtls_free(exported_pub_key);
exported_pub_key = NULL;
/* Export into too-small buffer should fail */
exported_pub_key_buf_size = MBEDTLS_LMOTS_PUBLIC_KEY_LEN(MBEDTLS_LMOTS_SHA256_N32_W8) - 1;
TEST_CALLOC(exported_pub_key, exported_pub_key_buf_size);
TEST_EQUAL(mbedtls_lmots_export_public_key(&ctx, exported_pub_key,
exported_pub_key_buf_size, NULL),
MBEDTLS_ERR_LMS_BUFFER_TOO_SMALL);
mbedtls_free(exported_pub_key);
exported_pub_key = NULL;
/* Export into too-large buffer should succeed */
exported_pub_key_buf_size = MBEDTLS_LMOTS_PUBLIC_KEY_LEN(MBEDTLS_LMOTS_SHA256_N32_W8) + 1;
TEST_CALLOC(exported_pub_key, exported_pub_key_buf_size);
TEST_EQUAL(mbedtls_lmots_export_public_key(&ctx, exported_pub_key,
exported_pub_key_buf_size,
&exported_pub_key_size),
0);
TEST_MEMORY_COMPARE(pub_key->x, pub_key->len,
exported_pub_key, exported_pub_key_size);
mbedtls_free(exported_pub_key);
exported_pub_key = NULL;
}
exit:
mbedtls_lmots_public_free(&ctx);
mbedtls_free(exported_pub_key);
}
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_LMS_PRIVATE */
void lmots_reuse_test(data_t *msg, data_t *key_id, int leaf_id, data_t *seed)
{
mbedtls_lmots_private_t ctx;
unsigned char sig[MBEDTLS_LMOTS_SIG_LEN(MBEDTLS_LMOTS_SHA256_N32_W8)];
mbedtls_lmots_private_init(&ctx);
TEST_EQUAL(mbedtls_lmots_generate_private_key(&ctx, MBEDTLS_LMOTS_SHA256_N32_W8,
key_id->x, leaf_id, seed->x,
seed->len), 0);
TEST_EQUAL(mbedtls_lmots_sign(&ctx, mbedtls_test_rnd_std_rand, NULL,
msg->x, msg->len, sig, sizeof(sig), NULL), 0);
/* Running another sign operation should fail, since the key should now have
* been erased.
*/
TEST_EQUAL(mbedtls_lmots_sign(&ctx, mbedtls_test_rnd_std_rand, NULL,
msg->x, msg->len, sig, sizeof(sig), NULL),
MBEDTLS_ERR_LMS_BAD_INPUT_DATA);
exit:
mbedtls_lmots_private_free(&ctx);
}
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_TEST_HOOKS:MBEDTLS_LMS_PRIVATE */
void lmots_signature_leak_test(data_t *msg, data_t *key_id, int leaf_id,
data_t *seed)
{
mbedtls_lmots_private_t ctx;
unsigned char sig[MBEDTLS_LMOTS_SIG_LEN(MBEDTLS_LMOTS_SHA256_N32_W8)];
mbedtls_lmots_sign_private_key_invalidated_hook = &check_lmots_private_key_for_leak;
/* Fill with recognisable pattern */
memset(sig, 0x7E, sizeof(sig));
mbedtls_lmots_private_init(&ctx);
TEST_EQUAL(mbedtls_lmots_generate_private_key(&ctx, MBEDTLS_LMOTS_SHA256_N32_W8,
key_id->x, leaf_id, seed->x,
seed->len), 0);
TEST_EQUAL(mbedtls_lmots_sign(&ctx, mbedtls_test_rnd_std_rand, NULL,
msg->x, msg->len, sig, sizeof(sig), NULL), 0);
exit:
mbedtls_lmots_private_free(&ctx);
mbedtls_lmots_sign_private_key_invalidated_hook = NULL;
}
/* END_CASE */
|
