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
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
|
/*
* Copyright The Mbed TLS Contributors
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "psa/crypto.h"
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#define ASSERT(predicate) \
do \
{ \
if (!(predicate)) \
{ \
printf("\tassertion failed at %s:%d - '%s'\r\n", \
__FILE__, __LINE__, #predicate); \
goto exit; \
} \
} while (0)
#define ASSERT_STATUS(actual, expected) \
do \
{ \
if ((actual) != (expected)) \
{ \
printf("\tassertion failed at %s:%d - " \
"actual:%d expected:%d\r\n", __FILE__, __LINE__, \
(psa_status_t) actual, (psa_status_t) expected); \
goto exit; \
} \
} while (0)
#if !defined(MBEDTLS_PSA_CRYPTO_C) || !defined(MBEDTLS_AES_C) || \
!defined(MBEDTLS_CIPHER_MODE_CBC) || !defined(MBEDTLS_CIPHER_MODE_CTR) || \
!defined(MBEDTLS_CIPHER_MODE_WITH_PADDING) || \
defined(MBEDTLS_PSA_CRYPTO_KEY_ID_ENCODES_OWNER)
int main(void)
{
printf("MBEDTLS_PSA_CRYPTO_C and/or MBEDTLS_AES_C and/or "
"MBEDTLS_CIPHER_MODE_CBC and/or MBEDTLS_CIPHER_MODE_CTR "
"and/or MBEDTLS_CIPHER_MODE_WITH_PADDING "
"not defined and/or MBEDTLS_PSA_CRYPTO_KEY_ID_ENCODES_OWNER"
" defined.\r\n");
return 0;
}
#else
static psa_status_t cipher_operation(psa_cipher_operation_t *operation,
const uint8_t *input,
size_t input_size,
size_t part_size,
uint8_t *output,
size_t output_size,
size_t *output_len)
{
psa_status_t status;
size_t bytes_to_write = 0, bytes_written = 0, len = 0;
*output_len = 0;
while (bytes_written != input_size) {
bytes_to_write = (input_size - bytes_written > part_size ?
part_size :
input_size - bytes_written);
status = psa_cipher_update(operation, input + bytes_written,
bytes_to_write, output + *output_len,
output_size - *output_len, &len);
ASSERT_STATUS(status, PSA_SUCCESS);
bytes_written += bytes_to_write;
*output_len += len;
}
status = psa_cipher_finish(operation, output + *output_len,
output_size - *output_len, &len);
ASSERT_STATUS(status, PSA_SUCCESS);
*output_len += len;
exit:
return status;
}
static psa_status_t cipher_encrypt(psa_key_id_t key,
psa_algorithm_t alg,
uint8_t *iv,
size_t iv_size,
const uint8_t *input,
size_t input_size,
size_t part_size,
uint8_t *output,
size_t output_size,
size_t *output_len)
{
psa_status_t status;
psa_cipher_operation_t operation = PSA_CIPHER_OPERATION_INIT;
size_t iv_len = 0;
memset(&operation, 0, sizeof(operation));
status = psa_cipher_encrypt_setup(&operation, key, alg);
ASSERT_STATUS(status, PSA_SUCCESS);
status = psa_cipher_generate_iv(&operation, iv, iv_size, &iv_len);
ASSERT_STATUS(status, PSA_SUCCESS);
status = cipher_operation(&operation, input, input_size, part_size,
output, output_size, output_len);
ASSERT_STATUS(status, PSA_SUCCESS);
exit:
psa_cipher_abort(&operation);
return status;
}
static psa_status_t cipher_decrypt(psa_key_id_t key,
psa_algorithm_t alg,
const uint8_t *iv,
size_t iv_size,
const uint8_t *input,
size_t input_size,
size_t part_size,
uint8_t *output,
size_t output_size,
size_t *output_len)
{
psa_status_t status;
psa_cipher_operation_t operation = PSA_CIPHER_OPERATION_INIT;
memset(&operation, 0, sizeof(operation));
status = psa_cipher_decrypt_setup(&operation, key, alg);
ASSERT_STATUS(status, PSA_SUCCESS);
status = psa_cipher_set_iv(&operation, iv, iv_size);
ASSERT_STATUS(status, PSA_SUCCESS);
status = cipher_operation(&operation, input, input_size, part_size,
output, output_size, output_len);
ASSERT_STATUS(status, PSA_SUCCESS);
exit:
psa_cipher_abort(&operation);
return status;
}
static psa_status_t
cipher_example_encrypt_decrypt_aes_cbc_nopad_1_block(void)
{
enum {
block_size = PSA_BLOCK_CIPHER_BLOCK_LENGTH(PSA_KEY_TYPE_AES),
key_bits = 256,
part_size = block_size,
};
const psa_algorithm_t alg = PSA_ALG_CBC_NO_PADDING;
psa_status_t status;
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
psa_key_id_t key = 0;
size_t output_len = 0;
uint8_t iv[block_size];
uint8_t input[block_size];
uint8_t encrypt[block_size];
uint8_t decrypt[block_size];
status = psa_generate_random(input, sizeof(input));
ASSERT_STATUS(status, PSA_SUCCESS);
psa_set_key_usage_flags(&attributes,
PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT);
psa_set_key_algorithm(&attributes, alg);
psa_set_key_type(&attributes, PSA_KEY_TYPE_AES);
psa_set_key_bits(&attributes, key_bits);
status = psa_generate_key(&attributes, &key);
ASSERT_STATUS(status, PSA_SUCCESS);
status = cipher_encrypt(key, alg, iv, sizeof(iv),
input, sizeof(input), part_size,
encrypt, sizeof(encrypt), &output_len);
ASSERT_STATUS(status, PSA_SUCCESS);
status = cipher_decrypt(key, alg, iv, sizeof(iv),
encrypt, output_len, part_size,
decrypt, sizeof(decrypt), &output_len);
ASSERT_STATUS(status, PSA_SUCCESS);
status = memcmp(input, decrypt, sizeof(input));
ASSERT_STATUS(status, PSA_SUCCESS);
exit:
psa_destroy_key(key);
return status;
}
static psa_status_t cipher_example_encrypt_decrypt_aes_cbc_pkcs7_multi(void)
{
enum {
block_size = PSA_BLOCK_CIPHER_BLOCK_LENGTH(PSA_KEY_TYPE_AES),
key_bits = 256,
input_size = 100,
part_size = 10,
};
const psa_algorithm_t alg = PSA_ALG_CBC_PKCS7;
psa_status_t status;
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
psa_key_id_t key = 0;
size_t output_len = 0;
uint8_t iv[block_size], input[input_size],
encrypt[input_size + block_size], decrypt[input_size + block_size];
status = psa_generate_random(input, sizeof(input));
ASSERT_STATUS(status, PSA_SUCCESS);
psa_set_key_usage_flags(&attributes,
PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT);
psa_set_key_algorithm(&attributes, alg);
psa_set_key_type(&attributes, PSA_KEY_TYPE_AES);
psa_set_key_bits(&attributes, key_bits);
status = psa_generate_key(&attributes, &key);
ASSERT_STATUS(status, PSA_SUCCESS);
status = cipher_encrypt(key, alg, iv, sizeof(iv),
input, sizeof(input), part_size,
encrypt, sizeof(encrypt), &output_len);
ASSERT_STATUS(status, PSA_SUCCESS);
status = cipher_decrypt(key, alg, iv, sizeof(iv),
encrypt, output_len, part_size,
decrypt, sizeof(decrypt), &output_len);
ASSERT_STATUS(status, PSA_SUCCESS);
status = memcmp(input, decrypt, sizeof(input));
ASSERT_STATUS(status, PSA_SUCCESS);
exit:
psa_destroy_key(key);
return status;
}
static psa_status_t cipher_example_encrypt_decrypt_aes_ctr_multi(void)
{
enum {
block_size = PSA_BLOCK_CIPHER_BLOCK_LENGTH(PSA_KEY_TYPE_AES),
key_bits = 256,
input_size = 100,
part_size = 10,
};
const psa_algorithm_t alg = PSA_ALG_CTR;
psa_status_t status;
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
psa_key_id_t key = 0;
size_t output_len = 0;
uint8_t iv[block_size], input[input_size], encrypt[input_size],
decrypt[input_size];
status = psa_generate_random(input, sizeof(input));
ASSERT_STATUS(status, PSA_SUCCESS);
psa_set_key_usage_flags(&attributes,
PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT);
psa_set_key_algorithm(&attributes, alg);
psa_set_key_type(&attributes, PSA_KEY_TYPE_AES);
psa_set_key_bits(&attributes, key_bits);
status = psa_generate_key(&attributes, &key);
ASSERT_STATUS(status, PSA_SUCCESS);
status = cipher_encrypt(key, alg, iv, sizeof(iv),
input, sizeof(input), part_size,
encrypt, sizeof(encrypt), &output_len);
ASSERT_STATUS(status, PSA_SUCCESS);
status = cipher_decrypt(key, alg, iv, sizeof(iv),
encrypt, output_len, part_size,
decrypt, sizeof(decrypt), &output_len);
ASSERT_STATUS(status, PSA_SUCCESS);
status = memcmp(input, decrypt, sizeof(input));
ASSERT_STATUS(status, PSA_SUCCESS);
exit:
psa_destroy_key(key);
return status;
}
static void cipher_examples(void)
{
psa_status_t status;
printf("cipher encrypt/decrypt AES CBC no padding:\r\n");
status = cipher_example_encrypt_decrypt_aes_cbc_nopad_1_block();
if (status == PSA_SUCCESS) {
printf("\tsuccess!\r\n");
}
printf("cipher encrypt/decrypt AES CBC PKCS7 multipart:\r\n");
status = cipher_example_encrypt_decrypt_aes_cbc_pkcs7_multi();
if (status == PSA_SUCCESS) {
printf("\tsuccess!\r\n");
}
printf("cipher encrypt/decrypt AES CTR multipart:\r\n");
status = cipher_example_encrypt_decrypt_aes_ctr_multi();
if (status == PSA_SUCCESS) {
printf("\tsuccess!\r\n");
}
}
int main(void)
{
ASSERT(psa_crypto_init() == PSA_SUCCESS);
cipher_examples();
exit:
mbedtls_psa_crypto_free();
return 0;
}
#endif /* MBEDTLS_PSA_CRYPTO_C && MBEDTLS_AES_C && MBEDTLS_CIPHER_MODE_CBC &&
MBEDTLS_CIPHER_MODE_CTR && MBEDTLS_CIPHER_MODE_WITH_PADDING */
|
