1 /*
2 * PSA ECP layer on top of Mbed TLS crypto
3 */
4 /*
5 * Copyright The Mbed TLS Contributors
6 * SPDX-License-Identifier: Apache-2.0
7 *
8 * Licensed under the Apache License, Version 2.0 (the "License"); you may
9 * not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
16 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 */
20
21 #include "common.h"
22
23 #if defined(MBEDTLS_PSA_CRYPTO_C)
24
25 #include <psa/crypto.h>
26 #include "psa_crypto_core.h"
27 #include "psa_crypto_ecp.h"
28 #include "psa_crypto_random_impl.h"
29 #include "hash_info.h"
30
31 #include <stdlib.h>
32 #include <string.h>
33 #include "mbedtls/platform.h"
34
35 #include <mbedtls/ecdsa.h>
36 #include <mbedtls/ecdh.h>
37 #include <mbedtls/ecp.h>
38 #include <mbedtls/error.h>
39
40 #if defined(MBEDTLS_PSA_BUILTIN_KEY_TYPE_ECC_KEY_PAIR) || \
41 defined(MBEDTLS_PSA_BUILTIN_KEY_TYPE_ECC_PUBLIC_KEY) || \
42 defined(MBEDTLS_PSA_BUILTIN_ALG_ECDSA) || \
43 defined(MBEDTLS_PSA_BUILTIN_ALG_DETERMINISTIC_ECDSA) || \
44 defined(MBEDTLS_PSA_BUILTIN_ALG_ECDH)
mbedtls_psa_ecp_load_representation(psa_key_type_t type,size_t curve_bits,const uint8_t * data,size_t data_length,mbedtls_ecp_keypair ** p_ecp)45 psa_status_t mbedtls_psa_ecp_load_representation(
46 psa_key_type_t type, size_t curve_bits,
47 const uint8_t *data, size_t data_length,
48 mbedtls_ecp_keypair **p_ecp )
49 {
50 mbedtls_ecp_group_id grp_id = MBEDTLS_ECP_DP_NONE;
51 psa_status_t status;
52 mbedtls_ecp_keypair *ecp = NULL;
53 size_t curve_bytes = data_length;
54 int explicit_bits = ( curve_bits != 0 );
55
56 if( PSA_KEY_TYPE_IS_PUBLIC_KEY( type ) &&
57 PSA_KEY_TYPE_ECC_GET_FAMILY( type ) != PSA_ECC_FAMILY_MONTGOMERY )
58 {
59 /* A Weierstrass public key is represented as:
60 * - The byte 0x04;
61 * - `x_P` as a `ceiling(m/8)`-byte string, big-endian;
62 * - `y_P` as a `ceiling(m/8)`-byte string, big-endian.
63 * So its data length is 2m+1 where m is the curve size in bits.
64 */
65 if( ( data_length & 1 ) == 0 )
66 return( PSA_ERROR_INVALID_ARGUMENT );
67 curve_bytes = data_length / 2;
68
69 /* Montgomery public keys are represented in compressed format, meaning
70 * their curve_bytes is equal to the amount of input. */
71
72 /* Private keys are represented in uncompressed private random integer
73 * format, meaning their curve_bytes is equal to the amount of input. */
74 }
75
76 if( explicit_bits )
77 {
78 /* With an explicit bit-size, the data must have the matching length. */
79 if( curve_bytes != PSA_BITS_TO_BYTES( curve_bits ) )
80 return( PSA_ERROR_INVALID_ARGUMENT );
81 }
82 else
83 {
84 /* We need to infer the bit-size from the data. Since the only
85 * information we have is the length in bytes, the value of curve_bits
86 * at this stage is rounded up to the nearest multiple of 8. */
87 curve_bits = PSA_BYTES_TO_BITS( curve_bytes );
88 }
89
90 /* Allocate and initialize a key representation. */
91 ecp = mbedtls_calloc( 1, sizeof( mbedtls_ecp_keypair ) );
92 if( ecp == NULL )
93 return( PSA_ERROR_INSUFFICIENT_MEMORY );
94 mbedtls_ecp_keypair_init( ecp );
95
96 /* Load the group. */
97 grp_id = mbedtls_ecc_group_of_psa( PSA_KEY_TYPE_ECC_GET_FAMILY( type ),
98 curve_bits, !explicit_bits );
99 if( grp_id == MBEDTLS_ECP_DP_NONE )
100 {
101 /* We can't distinguish between a nonsensical family/size combination
102 * (which would warrant PSA_ERROR_INVALID_ARGUMENT) and a
103 * well-regarded curve that Mbed TLS just doesn't know about (which
104 * would warrant PSA_ERROR_NOT_SUPPORTED). For uniformity with how
105 * curves that Mbed TLS knows about but for which support is disabled
106 * at build time, return NOT_SUPPORTED. */
107 status = PSA_ERROR_NOT_SUPPORTED;
108 goto exit;
109 }
110
111 status = mbedtls_to_psa_error(
112 mbedtls_ecp_group_load( &ecp->grp, grp_id ) );
113 if( status != PSA_SUCCESS )
114 goto exit;
115
116 /* Load the key material. */
117 if( PSA_KEY_TYPE_IS_PUBLIC_KEY( type ) )
118 {
119 /* Load the public value. */
120 status = mbedtls_to_psa_error(
121 mbedtls_ecp_point_read_binary( &ecp->grp, &ecp->Q,
122 data,
123 data_length ) );
124 if( status != PSA_SUCCESS )
125 goto exit;
126
127 /* Check that the point is on the curve. */
128 status = mbedtls_to_psa_error(
129 mbedtls_ecp_check_pubkey( &ecp->grp, &ecp->Q ) );
130 if( status != PSA_SUCCESS )
131 goto exit;
132 }
133 else
134 {
135 /* Load and validate the secret value. */
136 status = mbedtls_to_psa_error(
137 mbedtls_ecp_read_key( ecp->grp.id,
138 ecp,
139 data,
140 data_length ) );
141 if( status != PSA_SUCCESS )
142 goto exit;
143 }
144
145 *p_ecp = ecp;
146 exit:
147 if( status != PSA_SUCCESS )
148 {
149 mbedtls_ecp_keypair_free( ecp );
150 mbedtls_free( ecp );
151 }
152
153 return( status );
154 }
155 #endif /* defined(MBEDTLS_PSA_BUILTIN_KEY_TYPE_ECC_KEY_PAIR) ||
156 * defined(MBEDTLS_PSA_BUILTIN_KEY_TYPE_ECC_PUBLIC_KEY) ||
157 * defined(MBEDTLS_PSA_BUILTIN_ALG_ECDSA) ||
158 * defined(MBEDTLS_PSA_BUILTIN_ALG_DETERMINISTIC_ECDSA) ||
159 * defined(MBEDTLS_PSA_BUILTIN_ALG_ECDH) */
160
161 #if defined(MBEDTLS_PSA_BUILTIN_KEY_TYPE_ECC_KEY_PAIR) || \
162 defined(MBEDTLS_PSA_BUILTIN_KEY_TYPE_ECC_PUBLIC_KEY)
163
mbedtls_psa_ecp_import_key(const psa_key_attributes_t * attributes,const uint8_t * data,size_t data_length,uint8_t * key_buffer,size_t key_buffer_size,size_t * key_buffer_length,size_t * bits)164 psa_status_t mbedtls_psa_ecp_import_key(
165 const psa_key_attributes_t *attributes,
166 const uint8_t *data, size_t data_length,
167 uint8_t *key_buffer, size_t key_buffer_size,
168 size_t *key_buffer_length, size_t *bits )
169 {
170 psa_status_t status;
171 mbedtls_ecp_keypair *ecp = NULL;
172
173 /* Parse input */
174 status = mbedtls_psa_ecp_load_representation( attributes->core.type,
175 attributes->core.bits,
176 data,
177 data_length,
178 &ecp );
179 if( status != PSA_SUCCESS )
180 goto exit;
181
182 if( PSA_KEY_TYPE_ECC_GET_FAMILY( attributes->core.type ) ==
183 PSA_ECC_FAMILY_MONTGOMERY )
184 *bits = ecp->grp.nbits + 1;
185 else
186 *bits = ecp->grp.nbits;
187
188 /* Re-export the data to PSA export format. There is currently no support
189 * for other input formats then the export format, so this is a 1-1
190 * copy operation. */
191 status = mbedtls_psa_ecp_export_key( attributes->core.type,
192 ecp,
193 key_buffer,
194 key_buffer_size,
195 key_buffer_length );
196 exit:
197 /* Always free the PK object (will also free contained ECP context) */
198 mbedtls_ecp_keypair_free( ecp );
199 mbedtls_free( ecp );
200
201 return( status );
202 }
203
mbedtls_psa_ecp_export_key(psa_key_type_t type,mbedtls_ecp_keypair * ecp,uint8_t * data,size_t data_size,size_t * data_length)204 psa_status_t mbedtls_psa_ecp_export_key( psa_key_type_t type,
205 mbedtls_ecp_keypair *ecp,
206 uint8_t *data,
207 size_t data_size,
208 size_t *data_length )
209 {
210 psa_status_t status;
211
212 if( PSA_KEY_TYPE_IS_PUBLIC_KEY( type ) )
213 {
214 /* Check whether the public part is loaded */
215 if( mbedtls_ecp_is_zero( &ecp->Q ) )
216 {
217 /* Calculate the public key */
218 status = mbedtls_to_psa_error(
219 mbedtls_ecp_mul( &ecp->grp, &ecp->Q, &ecp->d, &ecp->grp.G,
220 mbedtls_psa_get_random,
221 MBEDTLS_PSA_RANDOM_STATE ) );
222 if( status != PSA_SUCCESS )
223 return( status );
224 }
225
226 status = mbedtls_to_psa_error(
227 mbedtls_ecp_point_write_binary( &ecp->grp, &ecp->Q,
228 MBEDTLS_ECP_PF_UNCOMPRESSED,
229 data_length,
230 data,
231 data_size ) );
232 if( status != PSA_SUCCESS )
233 memset( data, 0, data_size );
234
235 return( status );
236 }
237 else
238 {
239 if( data_size < PSA_BITS_TO_BYTES( ecp->grp.nbits ) )
240 return( PSA_ERROR_BUFFER_TOO_SMALL );
241
242 status = mbedtls_to_psa_error(
243 mbedtls_ecp_write_key( ecp,
244 data,
245 PSA_BITS_TO_BYTES( ecp->grp.nbits ) ) );
246 if( status == PSA_SUCCESS )
247 *data_length = PSA_BITS_TO_BYTES( ecp->grp.nbits );
248 else
249 memset( data, 0, data_size );
250
251 return( status );
252 }
253 }
254
mbedtls_psa_ecp_export_public_key(const psa_key_attributes_t * attributes,const uint8_t * key_buffer,size_t key_buffer_size,uint8_t * data,size_t data_size,size_t * data_length)255 psa_status_t mbedtls_psa_ecp_export_public_key(
256 const psa_key_attributes_t *attributes,
257 const uint8_t *key_buffer, size_t key_buffer_size,
258 uint8_t *data, size_t data_size, size_t *data_length )
259 {
260 psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
261 mbedtls_ecp_keypair *ecp = NULL;
262
263 status = mbedtls_psa_ecp_load_representation(
264 attributes->core.type, attributes->core.bits,
265 key_buffer, key_buffer_size, &ecp );
266 if( status != PSA_SUCCESS )
267 return( status );
268
269 status = mbedtls_psa_ecp_export_key(
270 PSA_KEY_TYPE_ECC_PUBLIC_KEY(
271 PSA_KEY_TYPE_ECC_GET_FAMILY( attributes->core.type ) ),
272 ecp, data, data_size, data_length );
273
274 mbedtls_ecp_keypair_free( ecp );
275 mbedtls_free( ecp );
276
277 return( status );
278 }
279 #endif /* defined(MBEDTLS_PSA_BUILTIN_KEY_TYPE_ECC_KEY_PAIR) ||
280 * defined(MBEDTLS_PSA_BUILTIN_KEY_TYPE_ECC_PUBLIC_KEY) */
281
282 #if defined(MBEDTLS_PSA_BUILTIN_KEY_TYPE_ECC_KEY_PAIR)
mbedtls_psa_ecp_generate_key(const psa_key_attributes_t * attributes,uint8_t * key_buffer,size_t key_buffer_size,size_t * key_buffer_length)283 psa_status_t mbedtls_psa_ecp_generate_key(
284 const psa_key_attributes_t *attributes,
285 uint8_t *key_buffer, size_t key_buffer_size, size_t *key_buffer_length )
286 {
287 psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
288 int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
289
290 psa_ecc_family_t curve = PSA_KEY_TYPE_ECC_GET_FAMILY(
291 attributes->core.type );
292 mbedtls_ecp_group_id grp_id =
293 mbedtls_ecc_group_of_psa( curve, attributes->core.bits, 0 );
294
295 const mbedtls_ecp_curve_info *curve_info =
296 mbedtls_ecp_curve_info_from_grp_id( grp_id );
297 mbedtls_ecp_keypair ecp;
298
299 if( attributes->domain_parameters_size != 0 )
300 return( PSA_ERROR_NOT_SUPPORTED );
301
302 if( grp_id == MBEDTLS_ECP_DP_NONE || curve_info == NULL )
303 return( PSA_ERROR_NOT_SUPPORTED );
304
305 mbedtls_ecp_keypair_init( &ecp );
306 ret = mbedtls_ecp_gen_key( grp_id, &ecp,
307 mbedtls_psa_get_random,
308 MBEDTLS_PSA_RANDOM_STATE );
309 if( ret != 0 )
310 {
311 mbedtls_ecp_keypair_free( &ecp );
312 return( mbedtls_to_psa_error( ret ) );
313 }
314
315 status = mbedtls_to_psa_error(
316 mbedtls_ecp_write_key( &ecp, key_buffer, key_buffer_size ) );
317
318 mbedtls_ecp_keypair_free( &ecp );
319
320 if( status == PSA_SUCCESS )
321 *key_buffer_length = key_buffer_size;
322
323 return( status );
324 }
325 #endif /* defined(MBEDTLS_PSA_BUILTIN_KEY_TYPE_ECC_KEY_PAIR) */
326
327 /****************************************************************/
328 /* ECDSA sign/verify */
329 /****************************************************************/
330
331 #if defined(MBEDTLS_PSA_BUILTIN_ALG_ECDSA) || \
332 defined(MBEDTLS_PSA_BUILTIN_ALG_DETERMINISTIC_ECDSA)
mbedtls_psa_ecdsa_sign_hash(const psa_key_attributes_t * attributes,const uint8_t * key_buffer,size_t key_buffer_size,psa_algorithm_t alg,const uint8_t * hash,size_t hash_length,uint8_t * signature,size_t signature_size,size_t * signature_length)333 psa_status_t mbedtls_psa_ecdsa_sign_hash(
334 const psa_key_attributes_t *attributes,
335 const uint8_t *key_buffer, size_t key_buffer_size,
336 psa_algorithm_t alg, const uint8_t *hash, size_t hash_length,
337 uint8_t *signature, size_t signature_size, size_t *signature_length )
338 {
339 psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
340 mbedtls_ecp_keypair *ecp = NULL;
341 int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
342 size_t curve_bytes;
343 mbedtls_mpi r, s;
344
345 status = mbedtls_psa_ecp_load_representation( attributes->core.type,
346 attributes->core.bits,
347 key_buffer,
348 key_buffer_size,
349 &ecp );
350 if( status != PSA_SUCCESS )
351 return( status );
352
353 curve_bytes = PSA_BITS_TO_BYTES( ecp->grp.pbits );
354 mbedtls_mpi_init( &r );
355 mbedtls_mpi_init( &s );
356
357 if( signature_size < 2 * curve_bytes )
358 {
359 ret = MBEDTLS_ERR_ECP_BUFFER_TOO_SMALL;
360 goto cleanup;
361 }
362
363 if( PSA_ALG_ECDSA_IS_DETERMINISTIC( alg ) )
364 {
365 #if defined(MBEDTLS_PSA_BUILTIN_ALG_DETERMINISTIC_ECDSA)
366 psa_algorithm_t hash_alg = PSA_ALG_SIGN_GET_HASH( alg );
367 mbedtls_md_type_t md_alg = mbedtls_hash_info_md_from_psa( hash_alg );
368 MBEDTLS_MPI_CHK( mbedtls_ecdsa_sign_det_ext(
369 &ecp->grp, &r, &s,
370 &ecp->d, hash,
371 hash_length, md_alg,
372 mbedtls_psa_get_random,
373 MBEDTLS_PSA_RANDOM_STATE ) );
374 #else
375 ret = MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE;
376 goto cleanup;
377 #endif /* defined(MBEDTLS_PSA_BUILTIN_ALG_DETERMINISTIC_ECDSA) */
378 }
379 else
380 {
381 (void) alg;
382 MBEDTLS_MPI_CHK( mbedtls_ecdsa_sign( &ecp->grp, &r, &s, &ecp->d,
383 hash, hash_length,
384 mbedtls_psa_get_random,
385 MBEDTLS_PSA_RANDOM_STATE ) );
386 }
387
388 MBEDTLS_MPI_CHK( mbedtls_mpi_write_binary( &r,
389 signature,
390 curve_bytes ) );
391 MBEDTLS_MPI_CHK( mbedtls_mpi_write_binary( &s,
392 signature + curve_bytes,
393 curve_bytes ) );
394 cleanup:
395 mbedtls_mpi_free( &r );
396 mbedtls_mpi_free( &s );
397 if( ret == 0 )
398 *signature_length = 2 * curve_bytes;
399
400 mbedtls_ecp_keypair_free( ecp );
401 mbedtls_free( ecp );
402
403 return( mbedtls_to_psa_error( ret ) );
404 }
405
mbedtls_psa_ecdsa_verify_hash(const psa_key_attributes_t * attributes,const uint8_t * key_buffer,size_t key_buffer_size,psa_algorithm_t alg,const uint8_t * hash,size_t hash_length,const uint8_t * signature,size_t signature_length)406 psa_status_t mbedtls_psa_ecdsa_verify_hash(
407 const psa_key_attributes_t *attributes,
408 const uint8_t *key_buffer, size_t key_buffer_size,
409 psa_algorithm_t alg, const uint8_t *hash, size_t hash_length,
410 const uint8_t *signature, size_t signature_length )
411 {
412 psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
413 mbedtls_ecp_keypair *ecp = NULL;
414 int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
415 size_t curve_bytes;
416 mbedtls_mpi r, s;
417
418 (void)alg;
419
420 status = mbedtls_psa_ecp_load_representation( attributes->core.type,
421 attributes->core.bits,
422 key_buffer,
423 key_buffer_size,
424 &ecp );
425 if( status != PSA_SUCCESS )
426 return( status );
427
428 curve_bytes = PSA_BITS_TO_BYTES( ecp->grp.pbits );
429 mbedtls_mpi_init( &r );
430 mbedtls_mpi_init( &s );
431
432 if( signature_length != 2 * curve_bytes )
433 {
434 ret = MBEDTLS_ERR_ECP_VERIFY_FAILED;
435 goto cleanup;
436 }
437
438 MBEDTLS_MPI_CHK( mbedtls_mpi_read_binary( &r,
439 signature,
440 curve_bytes ) );
441 MBEDTLS_MPI_CHK( mbedtls_mpi_read_binary( &s,
442 signature + curve_bytes,
443 curve_bytes ) );
444
445 /* Check whether the public part is loaded. If not, load it. */
446 if( mbedtls_ecp_is_zero( &ecp->Q ) )
447 {
448 MBEDTLS_MPI_CHK(
449 mbedtls_ecp_mul( &ecp->grp, &ecp->Q, &ecp->d, &ecp->grp.G,
450 mbedtls_psa_get_random, MBEDTLS_PSA_RANDOM_STATE ) );
451 }
452
453 ret = mbedtls_ecdsa_verify( &ecp->grp, hash, hash_length,
454 &ecp->Q, &r, &s );
455
456 cleanup:
457 mbedtls_mpi_free( &r );
458 mbedtls_mpi_free( &s );
459 mbedtls_ecp_keypair_free( ecp );
460 mbedtls_free( ecp );
461
462 return( mbedtls_to_psa_error( ret ) );
463 }
464
465 #endif /* defined(MBEDTLS_PSA_BUILTIN_ALG_ECDSA) || \
466 * defined(MBEDTLS_PSA_BUILTIN_ALG_DETERMINISTIC_ECDSA) */
467
468 /****************************************************************/
469 /* ECDH Key Agreement */
470 /****************************************************************/
471
472 #if defined(MBEDTLS_PSA_BUILTIN_ALG_ECDH)
mbedtls_psa_key_agreement_ecdh(const psa_key_attributes_t * attributes,const uint8_t * key_buffer,size_t key_buffer_size,psa_algorithm_t alg,const uint8_t * peer_key,size_t peer_key_length,uint8_t * shared_secret,size_t shared_secret_size,size_t * shared_secret_length)473 psa_status_t mbedtls_psa_key_agreement_ecdh(
474 const psa_key_attributes_t *attributes,
475 const uint8_t *key_buffer, size_t key_buffer_size,
476 psa_algorithm_t alg, const uint8_t *peer_key, size_t peer_key_length,
477 uint8_t *shared_secret, size_t shared_secret_size,
478 size_t *shared_secret_length )
479 {
480 psa_status_t status;
481 if( ! PSA_KEY_TYPE_IS_ECC_KEY_PAIR( attributes->core.type ) ||
482 ! PSA_ALG_IS_ECDH(alg) )
483 return( PSA_ERROR_INVALID_ARGUMENT );
484 mbedtls_ecp_keypair *ecp = NULL;
485 status = mbedtls_psa_ecp_load_representation(
486 attributes->core.type,
487 attributes->core.bits,
488 key_buffer,
489 key_buffer_size,
490 &ecp );
491 if( status != PSA_SUCCESS )
492 return( status );
493 mbedtls_ecp_keypair *their_key = NULL;
494 mbedtls_ecdh_context ecdh;
495 size_t bits = 0;
496 psa_ecc_family_t curve = mbedtls_ecc_group_to_psa( ecp->grp.id, &bits );
497 mbedtls_ecdh_init( &ecdh );
498
499 status = mbedtls_psa_ecp_load_representation(
500 PSA_KEY_TYPE_ECC_PUBLIC_KEY(curve),
501 bits,
502 peer_key,
503 peer_key_length,
504 &their_key );
505 if( status != PSA_SUCCESS )
506 goto exit;
507
508 status = mbedtls_to_psa_error(
509 mbedtls_ecdh_get_params( &ecdh, their_key, MBEDTLS_ECDH_THEIRS ) );
510 if( status != PSA_SUCCESS )
511 goto exit;
512 status = mbedtls_to_psa_error(
513 mbedtls_ecdh_get_params( &ecdh, ecp, MBEDTLS_ECDH_OURS ) );
514 if( status != PSA_SUCCESS )
515 goto exit;
516
517 status = mbedtls_to_psa_error(
518 mbedtls_ecdh_calc_secret( &ecdh,
519 shared_secret_length,
520 shared_secret, shared_secret_size,
521 mbedtls_psa_get_random,
522 MBEDTLS_PSA_RANDOM_STATE ) );
523 if( status != PSA_SUCCESS )
524 goto exit;
525 if( PSA_BITS_TO_BYTES( bits ) != *shared_secret_length )
526 status = PSA_ERROR_CORRUPTION_DETECTED;
527 exit:
528 if( status != PSA_SUCCESS )
529 mbedtls_platform_zeroize( shared_secret, shared_secret_size );
530 mbedtls_ecdh_free( &ecdh );
531 mbedtls_ecp_keypair_free( their_key );
532 mbedtls_free( their_key );
533 mbedtls_ecp_keypair_free( ecp );
534 mbedtls_free( ecp );
535 return( status );
536 }
537 #endif /* MBEDTLS_PSA_BUILTIN_ALG_ECDH */
538
539
540 #endif /* MBEDTLS_PSA_CRYPTO_C */
541
