1 /*
2 * Public Key abstraction layer: wrapper functions
3 *
4 * Copyright The Mbed TLS Contributors
5 * SPDX-License-Identifier: Apache-2.0
6 *
7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
8 * not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 */
19
20 #include "common.h"
21
22 #include "mbedtls/platform_util.h"
23
24 #if defined(MBEDTLS_PK_C)
25 #include "pk_wrap.h"
26 #include "mbedtls/error.h"
27
28 /* Even if RSA not activated, for the sake of RSA-alt */
29 #include "mbedtls/rsa.h"
30
31 #if defined(MBEDTLS_ECP_C)
32 #include "mbedtls/ecp.h"
33 #endif
34
35 #if defined(MBEDTLS_ECDSA_C)
36 #include "mbedtls/ecdsa.h"
37 #endif
38
39 #if defined(MBEDTLS_RSA_C) && defined(MBEDTLS_PSA_CRYPTO_C)
40 #include "pkwrite.h"
41 #endif
42
43 #if defined(MBEDTLS_PSA_CRYPTO_C)
44 #include "mbedtls/psa_util.h"
45 #define PSA_PK_TO_MBEDTLS_ERR(status) psa_pk_status_to_mbedtls(status)
46 #define PSA_PK_RSA_TO_MBEDTLS_ERR(status) PSA_TO_MBEDTLS_ERR_LIST(status, \
47 psa_to_pk_rsa_errors, \
48 psa_pk_status_to_mbedtls)
49 #define PSA_PK_ECDSA_TO_MBEDTLS_ERR(status) PSA_TO_MBEDTLS_ERR_LIST(status, \
50 psa_to_pk_ecdsa_errors, \
51 psa_pk_status_to_mbedtls)
52 #endif
53
54 #if defined(MBEDTLS_USE_PSA_CRYPTO)
55 #include "psa/crypto.h"
56 #include "hash_info.h"
57
58 #if defined(MBEDTLS_PK_CAN_ECDSA_SOME)
59 #include "mbedtls/asn1write.h"
60 #include "mbedtls/asn1.h"
61 #endif
62 #endif /* MBEDTLS_USE_PSA_CRYPTO */
63
64 #include "mbedtls/platform.h"
65
66 #include <limits.h>
67 #include <stdint.h>
68 #include <string.h>
69
70 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
71 #if defined(MBEDTLS_PSA_CRYPTO_C)
mbedtls_pk_error_from_psa(psa_status_t status)72 int mbedtls_pk_error_from_psa(psa_status_t status)
73 {
74 switch (status) {
75 case PSA_SUCCESS:
76 return 0;
77 case PSA_ERROR_INVALID_HANDLE:
78 return MBEDTLS_ERR_PK_KEY_INVALID_FORMAT;
79 case PSA_ERROR_NOT_PERMITTED:
80 return MBEDTLS_ERR_ERROR_GENERIC_ERROR;
81 case PSA_ERROR_BUFFER_TOO_SMALL:
82 return MBEDTLS_ERR_PK_BUFFER_TOO_SMALL;
83 case PSA_ERROR_NOT_SUPPORTED:
84 return MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE;
85 case PSA_ERROR_INVALID_ARGUMENT:
86 return MBEDTLS_ERR_PK_INVALID_ALG;
87 case PSA_ERROR_INSUFFICIENT_MEMORY:
88 return MBEDTLS_ERR_PK_ALLOC_FAILED;
89 case PSA_ERROR_BAD_STATE:
90 return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
91 case PSA_ERROR_COMMUNICATION_FAILURE:
92 case PSA_ERROR_HARDWARE_FAILURE:
93 return MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED;
94 case PSA_ERROR_DATA_CORRUPT:
95 case PSA_ERROR_DATA_INVALID:
96 case PSA_ERROR_STORAGE_FAILURE:
97 return MBEDTLS_ERR_PK_FILE_IO_ERROR;
98 case PSA_ERROR_CORRUPTION_DETECTED:
99 return MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
100 default:
101 return MBEDTLS_ERR_ERROR_GENERIC_ERROR;
102 }
103 }
104
105 #if defined(PSA_WANT_KEY_TYPE_RSA_PUBLIC_KEY) || \
106 defined(PSA_WANT_KEY_TYPE_RSA_KEY_PAIR)
mbedtls_pk_error_from_psa_rsa(psa_status_t status)107 int mbedtls_pk_error_from_psa_rsa(psa_status_t status)
108 {
109 switch (status) {
110 case PSA_ERROR_NOT_PERMITTED:
111 case PSA_ERROR_INVALID_ARGUMENT:
112 case PSA_ERROR_INVALID_HANDLE:
113 return MBEDTLS_ERR_RSA_BAD_INPUT_DATA;
114 case PSA_ERROR_BUFFER_TOO_SMALL:
115 return MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE;
116 case PSA_ERROR_INSUFFICIENT_ENTROPY:
117 return MBEDTLS_ERR_RSA_RNG_FAILED;
118 case PSA_ERROR_INVALID_SIGNATURE:
119 return MBEDTLS_ERR_RSA_VERIFY_FAILED;
120 case PSA_ERROR_INVALID_PADDING:
121 return MBEDTLS_ERR_RSA_INVALID_PADDING;
122 case PSA_SUCCESS:
123 return 0;
124 case PSA_ERROR_NOT_SUPPORTED:
125 return MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE;
126 case PSA_ERROR_INSUFFICIENT_MEMORY:
127 return MBEDTLS_ERR_PK_ALLOC_FAILED;
128 case PSA_ERROR_BAD_STATE:
129 return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
130 case PSA_ERROR_COMMUNICATION_FAILURE:
131 case PSA_ERROR_HARDWARE_FAILURE:
132 return MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED;
133 case PSA_ERROR_DATA_CORRUPT:
134 case PSA_ERROR_DATA_INVALID:
135 case PSA_ERROR_STORAGE_FAILURE:
136 return MBEDTLS_ERR_PK_FILE_IO_ERROR;
137 case PSA_ERROR_CORRUPTION_DETECTED:
138 return MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
139 default:
140 return MBEDTLS_ERR_ERROR_GENERIC_ERROR;
141 }
142 }
143 #endif /* PSA_WANT_KEY_TYPE_RSA_PUBLIC_KEY || PSA_WANT_KEY_TYPE_RSA_KEY_PAIR */
144 #endif /* MBEDTLS_PSA_CRYPTO_C */
145
146 #if defined(MBEDTLS_USE_PSA_CRYPTO)
147 #if defined(PSA_WANT_KEY_TYPE_ECC_PUBLIC_KEY)
mbedtls_pk_error_from_psa_ecdsa(psa_status_t status)148 int mbedtls_pk_error_from_psa_ecdsa(psa_status_t status)
149 {
150 switch (status) {
151 case PSA_ERROR_NOT_PERMITTED:
152 case PSA_ERROR_INVALID_ARGUMENT:
153 return MBEDTLS_ERR_ECP_BAD_INPUT_DATA;
154 case PSA_ERROR_INVALID_HANDLE:
155 return MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE;
156 case PSA_ERROR_BUFFER_TOO_SMALL:
157 return MBEDTLS_ERR_ECP_BUFFER_TOO_SMALL;
158 case PSA_ERROR_INSUFFICIENT_ENTROPY:
159 return MBEDTLS_ERR_ECP_RANDOM_FAILED;
160 case PSA_ERROR_INVALID_SIGNATURE:
161 return MBEDTLS_ERR_ECP_VERIFY_FAILED;
162 case PSA_SUCCESS:
163 return 0;
164 case PSA_ERROR_NOT_SUPPORTED:
165 return MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE;
166 case PSA_ERROR_INSUFFICIENT_MEMORY:
167 return MBEDTLS_ERR_PK_ALLOC_FAILED;
168 case PSA_ERROR_BAD_STATE:
169 return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
170 case PSA_ERROR_COMMUNICATION_FAILURE:
171 case PSA_ERROR_HARDWARE_FAILURE:
172 return MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED;
173 case PSA_ERROR_DATA_CORRUPT:
174 case PSA_ERROR_DATA_INVALID:
175 case PSA_ERROR_STORAGE_FAILURE:
176 return MBEDTLS_ERR_PK_FILE_IO_ERROR;
177 case PSA_ERROR_CORRUPTION_DETECTED:
178 return MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
179 default:
180 return MBEDTLS_ERR_ERROR_GENERIC_ERROR;
181 }
182 }
183 #endif /* PSA_WANT_KEY_TYPE_ECC_PUBLIC_KEY */
184 #endif /* MBEDTLS_USE_PSA_CRYPTO */
185 #endif /* !MBEDTLS_DEPRECATED_REMOVED */
186
187 #if defined(MBEDTLS_RSA_C)
rsa_can_do(mbedtls_pk_type_t type)188 static int rsa_can_do(mbedtls_pk_type_t type)
189 {
190 return type == MBEDTLS_PK_RSA ||
191 type == MBEDTLS_PK_RSASSA_PSS;
192 }
193
rsa_get_bitlen(const void * ctx)194 static size_t rsa_get_bitlen(const void *ctx)
195 {
196 const mbedtls_rsa_context *rsa = (const mbedtls_rsa_context *) ctx;
197 return 8 * mbedtls_rsa_get_len(rsa);
198 }
199
200 #if defined(MBEDTLS_USE_PSA_CRYPTO)
rsa_verify_wrap(void * ctx,mbedtls_md_type_t md_alg,const unsigned char * hash,size_t hash_len,const unsigned char * sig,size_t sig_len)201 static int rsa_verify_wrap(void *ctx, mbedtls_md_type_t md_alg,
202 const unsigned char *hash, size_t hash_len,
203 const unsigned char *sig, size_t sig_len)
204 {
205 mbedtls_rsa_context *rsa = (mbedtls_rsa_context *) ctx;
206 int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
207 psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
208 mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT;
209 psa_status_t status;
210 mbedtls_pk_context key;
211 int key_len;
212 unsigned char buf[MBEDTLS_PK_RSA_PUB_DER_MAX_BYTES];
213 psa_algorithm_t psa_alg_md =
214 PSA_ALG_RSA_PKCS1V15_SIGN(mbedtls_hash_info_psa_from_md(md_alg));
215 size_t rsa_len = mbedtls_rsa_get_len(rsa);
216
217 if (md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len) {
218 return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
219 }
220
221 if (sig_len < rsa_len) {
222 return MBEDTLS_ERR_RSA_VERIFY_FAILED;
223 }
224
225 /* mbedtls_pk_write_pubkey_der() expects a full PK context;
226 * re-construct one to make it happy */
227 key.pk_info = &mbedtls_rsa_info;
228 key.pk_ctx = ctx;
229 key_len = mbedtls_pk_write_pubkey_der(&key, buf, sizeof(buf));
230 if (key_len <= 0) {
231 return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
232 }
233
234 psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_VERIFY_HASH);
235 psa_set_key_algorithm(&attributes, psa_alg_md);
236 psa_set_key_type(&attributes, PSA_KEY_TYPE_RSA_PUBLIC_KEY);
237
238 status = psa_import_key(&attributes,
239 buf + sizeof(buf) - key_len, key_len,
240 &key_id);
241 if (status != PSA_SUCCESS) {
242 ret = PSA_PK_TO_MBEDTLS_ERR(status);
243 goto cleanup;
244 }
245
246 status = psa_verify_hash(key_id, psa_alg_md, hash, hash_len,
247 sig, sig_len);
248 if (status != PSA_SUCCESS) {
249 ret = PSA_PK_RSA_TO_MBEDTLS_ERR(status);
250 goto cleanup;
251 }
252 ret = 0;
253
254 cleanup:
255 status = psa_destroy_key(key_id);
256 if (ret == 0 && status != PSA_SUCCESS) {
257 ret = PSA_PK_TO_MBEDTLS_ERR(status);
258 }
259
260 return ret;
261 }
262 #else
rsa_verify_wrap(void * ctx,mbedtls_md_type_t md_alg,const unsigned char * hash,size_t hash_len,const unsigned char * sig,size_t sig_len)263 static int rsa_verify_wrap(void *ctx, mbedtls_md_type_t md_alg,
264 const unsigned char *hash, size_t hash_len,
265 const unsigned char *sig, size_t sig_len)
266 {
267 int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
268 mbedtls_rsa_context *rsa = (mbedtls_rsa_context *) ctx;
269 size_t rsa_len = mbedtls_rsa_get_len(rsa);
270
271 if (md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len) {
272 return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
273 }
274
275 if (sig_len < rsa_len) {
276 return MBEDTLS_ERR_RSA_VERIFY_FAILED;
277 }
278
279 if ((ret = mbedtls_rsa_pkcs1_verify(rsa, md_alg,
280 (unsigned int) hash_len,
281 hash, sig)) != 0) {
282 return ret;
283 }
284
285 /* The buffer contains a valid signature followed by extra data.
286 * We have a special error code for that so that so that callers can
287 * use mbedtls_pk_verify() to check "Does the buffer start with a
288 * valid signature?" and not just "Does the buffer contain a valid
289 * signature?". */
290 if (sig_len > rsa_len) {
291 return MBEDTLS_ERR_PK_SIG_LEN_MISMATCH;
292 }
293
294 return 0;
295 }
296 #endif
297
298 #if defined(MBEDTLS_PSA_CRYPTO_C)
mbedtls_pk_psa_rsa_sign_ext(psa_algorithm_t alg,mbedtls_rsa_context * rsa_ctx,const unsigned char * hash,size_t hash_len,unsigned char * sig,size_t sig_size,size_t * sig_len)299 int mbedtls_pk_psa_rsa_sign_ext(psa_algorithm_t alg,
300 mbedtls_rsa_context *rsa_ctx,
301 const unsigned char *hash, size_t hash_len,
302 unsigned char *sig, size_t sig_size,
303 size_t *sig_len)
304 {
305 int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
306 psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
307 mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT;
308 psa_status_t status;
309 mbedtls_pk_context key;
310 int key_len;
311 unsigned char buf[MBEDTLS_PK_RSA_PRV_DER_MAX_BYTES];
312 mbedtls_pk_info_t pk_info = mbedtls_rsa_info;
313
314 *sig_len = mbedtls_rsa_get_len(rsa_ctx);
315 if (sig_size < *sig_len) {
316 return MBEDTLS_ERR_PK_BUFFER_TOO_SMALL;
317 }
318
319 /* mbedtls_pk_write_key_der() expects a full PK context;
320 * re-construct one to make it happy */
321 key.pk_info = &pk_info;
322 key.pk_ctx = rsa_ctx;
323 key_len = mbedtls_pk_write_key_der(&key, buf, sizeof(buf));
324 if (key_len <= 0) {
325 return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
326 }
327 psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_SIGN_HASH);
328 psa_set_key_algorithm(&attributes, alg);
329 psa_set_key_type(&attributes, PSA_KEY_TYPE_RSA_KEY_PAIR);
330
331 status = psa_import_key(&attributes,
332 buf + sizeof(buf) - key_len, key_len,
333 &key_id);
334 if (status != PSA_SUCCESS) {
335 ret = PSA_PK_TO_MBEDTLS_ERR(status);
336 goto cleanup;
337 }
338 status = psa_sign_hash(key_id, alg, hash, hash_len,
339 sig, sig_size, sig_len);
340 if (status != PSA_SUCCESS) {
341 ret = PSA_PK_RSA_TO_MBEDTLS_ERR(status);
342 goto cleanup;
343 }
344
345 ret = 0;
346
347 cleanup:
348 status = psa_destroy_key(key_id);
349 if (ret == 0 && status != PSA_SUCCESS) {
350 ret = PSA_PK_TO_MBEDTLS_ERR(status);
351 }
352 return ret;
353 }
354 #endif /* MBEDTLS_PSA_CRYPTO_C */
355
356 #if defined(MBEDTLS_USE_PSA_CRYPTO)
rsa_sign_wrap(void * ctx,mbedtls_md_type_t md_alg,const unsigned char * hash,size_t hash_len,unsigned char * sig,size_t sig_size,size_t * sig_len,int (* f_rng)(void *,unsigned char *,size_t),void * p_rng)357 static int rsa_sign_wrap(void *ctx, mbedtls_md_type_t md_alg,
358 const unsigned char *hash, size_t hash_len,
359 unsigned char *sig, size_t sig_size, size_t *sig_len,
360 int (*f_rng)(void *, unsigned char *, size_t), void *p_rng)
361 {
362 ((void) f_rng);
363 ((void) p_rng);
364
365 psa_algorithm_t psa_md_alg;
366 psa_md_alg = mbedtls_hash_info_psa_from_md(md_alg);
367 if (psa_md_alg == 0) {
368 return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
369 }
370
371 return mbedtls_pk_psa_rsa_sign_ext(PSA_ALG_RSA_PKCS1V15_SIGN(
372 psa_md_alg),
373 ctx, hash, hash_len,
374 sig, sig_size, sig_len);
375 }
376 #else
rsa_sign_wrap(void * ctx,mbedtls_md_type_t md_alg,const unsigned char * hash,size_t hash_len,unsigned char * sig,size_t sig_size,size_t * sig_len,int (* f_rng)(void *,unsigned char *,size_t),void * p_rng)377 static int rsa_sign_wrap(void *ctx, mbedtls_md_type_t md_alg,
378 const unsigned char *hash, size_t hash_len,
379 unsigned char *sig, size_t sig_size, size_t *sig_len,
380 int (*f_rng)(void *, unsigned char *, size_t), void *p_rng)
381 {
382 mbedtls_rsa_context *rsa = (mbedtls_rsa_context *) ctx;
383
384 if (md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len) {
385 return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
386 }
387
388 *sig_len = mbedtls_rsa_get_len(rsa);
389 if (sig_size < *sig_len) {
390 return MBEDTLS_ERR_PK_BUFFER_TOO_SMALL;
391 }
392
393 return mbedtls_rsa_pkcs1_sign(rsa, f_rng, p_rng,
394 md_alg, (unsigned int) hash_len,
395 hash, sig);
396 }
397 #endif
398
399 #if defined(MBEDTLS_USE_PSA_CRYPTO)
rsa_decrypt_wrap(void * ctx,const unsigned char * input,size_t ilen,unsigned char * output,size_t * olen,size_t osize,int (* f_rng)(void *,unsigned char *,size_t),void * p_rng)400 static int rsa_decrypt_wrap(void *ctx,
401 const unsigned char *input, size_t ilen,
402 unsigned char *output, size_t *olen, size_t osize,
403 int (*f_rng)(void *, unsigned char *, size_t), void *p_rng)
404 {
405 mbedtls_rsa_context *rsa = (mbedtls_rsa_context *) ctx;
406 int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
407 psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
408 mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT;
409 psa_status_t status;
410 mbedtls_pk_context key;
411 int key_len;
412 unsigned char buf[MBEDTLS_PK_RSA_PRV_DER_MAX_BYTES];
413
414 ((void) f_rng);
415 ((void) p_rng);
416
417 #if !defined(MBEDTLS_RSA_ALT)
418 if (rsa->padding != MBEDTLS_RSA_PKCS_V15) {
419 return MBEDTLS_ERR_RSA_INVALID_PADDING;
420 }
421 #endif /* !MBEDTLS_RSA_ALT */
422
423 if (ilen != mbedtls_rsa_get_len(rsa)) {
424 return MBEDTLS_ERR_RSA_BAD_INPUT_DATA;
425 }
426
427 /* mbedtls_pk_write_key_der() expects a full PK context;
428 * re-construct one to make it happy */
429 key.pk_info = &mbedtls_rsa_info;
430 key.pk_ctx = ctx;
431 key_len = mbedtls_pk_write_key_der(&key, buf, sizeof(buf));
432 if (key_len <= 0) {
433 return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
434 }
435
436 psa_set_key_type(&attributes, PSA_KEY_TYPE_RSA_KEY_PAIR);
437 psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_DECRYPT);
438 psa_set_key_algorithm(&attributes, PSA_ALG_RSA_PKCS1V15_CRYPT);
439
440 status = psa_import_key(&attributes,
441 buf + sizeof(buf) - key_len, key_len,
442 &key_id);
443 if (status != PSA_SUCCESS) {
444 ret = PSA_PK_TO_MBEDTLS_ERR(status);
445 goto cleanup;
446 }
447
448 status = psa_asymmetric_decrypt(key_id, PSA_ALG_RSA_PKCS1V15_CRYPT,
449 input, ilen,
450 NULL, 0,
451 output, osize, olen);
452 if (status != PSA_SUCCESS) {
453 ret = PSA_PK_RSA_TO_MBEDTLS_ERR(status);
454 goto cleanup;
455 }
456
457 ret = 0;
458
459 cleanup:
460 mbedtls_platform_zeroize(buf, sizeof(buf));
461 status = psa_destroy_key(key_id);
462 if (ret == 0 && status != PSA_SUCCESS) {
463 ret = PSA_PK_TO_MBEDTLS_ERR(status);
464 }
465
466 return ret;
467 }
468 #else
rsa_decrypt_wrap(void * ctx,const unsigned char * input,size_t ilen,unsigned char * output,size_t * olen,size_t osize,int (* f_rng)(void *,unsigned char *,size_t),void * p_rng)469 static int rsa_decrypt_wrap(void *ctx,
470 const unsigned char *input, size_t ilen,
471 unsigned char *output, size_t *olen, size_t osize,
472 int (*f_rng)(void *, unsigned char *, size_t), void *p_rng)
473 {
474 mbedtls_rsa_context *rsa = (mbedtls_rsa_context *) ctx;
475
476 if (ilen != mbedtls_rsa_get_len(rsa)) {
477 return MBEDTLS_ERR_RSA_BAD_INPUT_DATA;
478 }
479
480 return mbedtls_rsa_pkcs1_decrypt(rsa, f_rng, p_rng,
481 olen, input, output, osize);
482 }
483 #endif
484
485 #if defined(MBEDTLS_USE_PSA_CRYPTO)
rsa_encrypt_wrap(void * ctx,const unsigned char * input,size_t ilen,unsigned char * output,size_t * olen,size_t osize,int (* f_rng)(void *,unsigned char *,size_t),void * p_rng)486 static int rsa_encrypt_wrap(void *ctx,
487 const unsigned char *input, size_t ilen,
488 unsigned char *output, size_t *olen, size_t osize,
489 int (*f_rng)(void *, unsigned char *, size_t), void *p_rng)
490 {
491 mbedtls_rsa_context *rsa = (mbedtls_rsa_context *) ctx;
492 int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
493 psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
494 mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT;
495 psa_status_t status;
496 mbedtls_pk_context key;
497 int key_len;
498 unsigned char buf[MBEDTLS_PK_RSA_PUB_DER_MAX_BYTES];
499
500 ((void) f_rng);
501 ((void) p_rng);
502
503 #if !defined(MBEDTLS_RSA_ALT)
504 if (rsa->padding != MBEDTLS_RSA_PKCS_V15) {
505 return MBEDTLS_ERR_RSA_INVALID_PADDING;
506 }
507 #endif
508
509 if (mbedtls_rsa_get_len(rsa) > osize) {
510 return MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE;
511 }
512
513 /* mbedtls_pk_write_pubkey_der() expects a full PK context;
514 * re-construct one to make it happy */
515 key.pk_info = &mbedtls_rsa_info;
516 key.pk_ctx = ctx;
517 key_len = mbedtls_pk_write_pubkey_der(&key, buf, sizeof(buf));
518 if (key_len <= 0) {
519 return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
520 }
521
522 psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_ENCRYPT);
523 psa_set_key_algorithm(&attributes, PSA_ALG_RSA_PKCS1V15_CRYPT);
524 psa_set_key_type(&attributes, PSA_KEY_TYPE_RSA_PUBLIC_KEY);
525
526 status = psa_import_key(&attributes,
527 buf + sizeof(buf) - key_len, key_len,
528 &key_id);
529 if (status != PSA_SUCCESS) {
530 ret = PSA_PK_TO_MBEDTLS_ERR(status);
531 goto cleanup;
532 }
533
534 status = psa_asymmetric_encrypt(key_id, PSA_ALG_RSA_PKCS1V15_CRYPT,
535 input, ilen,
536 NULL, 0,
537 output, osize, olen);
538 if (status != PSA_SUCCESS) {
539 ret = PSA_PK_RSA_TO_MBEDTLS_ERR(status);
540 goto cleanup;
541 }
542
543 ret = 0;
544
545 cleanup:
546 status = psa_destroy_key(key_id);
547 if (ret == 0 && status != PSA_SUCCESS) {
548 ret = PSA_PK_TO_MBEDTLS_ERR(status);
549 }
550
551 return ret;
552 }
553 #else
rsa_encrypt_wrap(void * ctx,const unsigned char * input,size_t ilen,unsigned char * output,size_t * olen,size_t osize,int (* f_rng)(void *,unsigned char *,size_t),void * p_rng)554 static int rsa_encrypt_wrap(void *ctx,
555 const unsigned char *input, size_t ilen,
556 unsigned char *output, size_t *olen, size_t osize,
557 int (*f_rng)(void *, unsigned char *, size_t), void *p_rng)
558 {
559 mbedtls_rsa_context *rsa = (mbedtls_rsa_context *) ctx;
560 *olen = mbedtls_rsa_get_len(rsa);
561
562 if (*olen > osize) {
563 return MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE;
564 }
565
566 return mbedtls_rsa_pkcs1_encrypt(rsa, f_rng, p_rng,
567 ilen, input, output);
568 }
569 #endif
570
rsa_check_pair_wrap(const void * pub,const void * prv,int (* f_rng)(void *,unsigned char *,size_t),void * p_rng)571 static int rsa_check_pair_wrap(const void *pub, const void *prv,
572 int (*f_rng)(void *, unsigned char *, size_t),
573 void *p_rng)
574 {
575 (void) f_rng;
576 (void) p_rng;
577 return mbedtls_rsa_check_pub_priv((const mbedtls_rsa_context *) pub,
578 (const mbedtls_rsa_context *) prv);
579 }
580
rsa_alloc_wrap(void)581 static void *rsa_alloc_wrap(void)
582 {
583 void *ctx = mbedtls_calloc(1, sizeof(mbedtls_rsa_context));
584
585 if (ctx != NULL) {
586 mbedtls_rsa_init((mbedtls_rsa_context *) ctx);
587 }
588
589 return ctx;
590 }
591
rsa_free_wrap(void * ctx)592 static void rsa_free_wrap(void *ctx)
593 {
594 mbedtls_rsa_free((mbedtls_rsa_context *) ctx);
595 mbedtls_free(ctx);
596 }
597
rsa_debug(const void * ctx,mbedtls_pk_debug_item * items)598 static void rsa_debug(const void *ctx, mbedtls_pk_debug_item *items)
599 {
600 #if defined(MBEDTLS_RSA_ALT)
601 /* Not supported */
602 (void) ctx;
603 (void) items;
604 #else
605 items->type = MBEDTLS_PK_DEBUG_MPI;
606 items->name = "rsa.N";
607 items->value = &(((mbedtls_rsa_context *) ctx)->N);
608
609 items++;
610
611 items->type = MBEDTLS_PK_DEBUG_MPI;
612 items->name = "rsa.E";
613 items->value = &(((mbedtls_rsa_context *) ctx)->E);
614 #endif
615 }
616
617 const mbedtls_pk_info_t mbedtls_rsa_info = {
618 MBEDTLS_PK_RSA,
619 "RSA",
620 rsa_get_bitlen,
621 rsa_can_do,
622 rsa_verify_wrap,
623 rsa_sign_wrap,
624 #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
625 NULL,
626 NULL,
627 #endif
628 rsa_decrypt_wrap,
629 rsa_encrypt_wrap,
630 rsa_check_pair_wrap,
631 rsa_alloc_wrap,
632 rsa_free_wrap,
633 #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
634 NULL,
635 NULL,
636 #endif
637 rsa_debug,
638 };
639 #endif /* MBEDTLS_RSA_C */
640
641 #if defined(MBEDTLS_ECP_C)
642 /*
643 * Generic EC key
644 */
eckey_can_do(mbedtls_pk_type_t type)645 static int eckey_can_do(mbedtls_pk_type_t type)
646 {
647 return type == MBEDTLS_PK_ECKEY ||
648 type == MBEDTLS_PK_ECKEY_DH ||
649 type == MBEDTLS_PK_ECDSA;
650 }
651
eckey_get_bitlen(const void * ctx)652 static size_t eckey_get_bitlen(const void *ctx)
653 {
654 return ((mbedtls_ecp_keypair *) ctx)->grp.pbits;
655 }
656
657 #if defined(MBEDTLS_PK_CAN_ECDSA_VERIFY)
658 #if defined(MBEDTLS_USE_PSA_CRYPTO)
659 /*
660 * An ASN.1 encoded signature is a sequence of two ASN.1 integers. Parse one of
661 * those integers and convert it to the fixed-length encoding expected by PSA.
662 */
extract_ecdsa_sig_int(unsigned char ** from,const unsigned char * end,unsigned char * to,size_t to_len)663 static int extract_ecdsa_sig_int(unsigned char **from, const unsigned char *end,
664 unsigned char *to, size_t to_len)
665 {
666 int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
667 size_t unpadded_len, padding_len;
668
669 if ((ret = mbedtls_asn1_get_tag(from, end, &unpadded_len,
670 MBEDTLS_ASN1_INTEGER)) != 0) {
671 return ret;
672 }
673
674 while (unpadded_len > 0 && **from == 0x00) {
675 (*from)++;
676 unpadded_len--;
677 }
678
679 if (unpadded_len > to_len || unpadded_len == 0) {
680 return MBEDTLS_ERR_ASN1_LENGTH_MISMATCH;
681 }
682
683 padding_len = to_len - unpadded_len;
684 memset(to, 0x00, padding_len);
685 memcpy(to + padding_len, *from, unpadded_len);
686 (*from) += unpadded_len;
687
688 return 0;
689 }
690
691 /*
692 * Convert a signature from an ASN.1 sequence of two integers
693 * to a raw {r,s} buffer. Note: the provided sig buffer must be at least
694 * twice as big as int_size.
695 */
extract_ecdsa_sig(unsigned char ** p,const unsigned char * end,unsigned char * sig,size_t int_size)696 static int extract_ecdsa_sig(unsigned char **p, const unsigned char *end,
697 unsigned char *sig, size_t int_size)
698 {
699 int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
700 size_t tmp_size;
701
702 if ((ret = mbedtls_asn1_get_tag(p, end, &tmp_size,
703 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE)) != 0) {
704 return ret;
705 }
706
707 /* Extract r */
708 if ((ret = extract_ecdsa_sig_int(p, end, sig, int_size)) != 0) {
709 return ret;
710 }
711 /* Extract s */
712 if ((ret = extract_ecdsa_sig_int(p, end, sig + int_size, int_size)) != 0) {
713 return ret;
714 }
715
716 return 0;
717 }
718
ecdsa_verify_wrap(void * ctx_arg,mbedtls_md_type_t md_alg,const unsigned char * hash,size_t hash_len,const unsigned char * sig,size_t sig_len)719 static int ecdsa_verify_wrap(void *ctx_arg, mbedtls_md_type_t md_alg,
720 const unsigned char *hash, size_t hash_len,
721 const unsigned char *sig, size_t sig_len)
722 {
723 mbedtls_ecp_keypair *ctx = ctx_arg;
724 int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
725 psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
726 mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT;
727 psa_status_t status;
728 size_t key_len;
729 /* This buffer will initially contain the public key and then the signature
730 * but at different points in time. For all curves except secp224k1, which
731 * is not currently supported in PSA, the public key is one byte longer
732 * (header byte + 2 numbers, while the signature is only 2 numbers),
733 * so use that as the buffer size. */
734 unsigned char buf[MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH];
735 unsigned char *p;
736 psa_algorithm_t psa_sig_md = PSA_ALG_ECDSA_ANY;
737 size_t curve_bits;
738 psa_ecc_family_t curve =
739 mbedtls_ecc_group_to_psa(ctx->grp.id, &curve_bits);
740 const size_t signature_part_size = (ctx->grp.nbits + 7) / 8;
741 ((void) md_alg);
742
743 if (curve == 0) {
744 return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
745 }
746
747 psa_set_key_type(&attributes, PSA_KEY_TYPE_ECC_PUBLIC_KEY(curve));
748 psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_VERIFY_HASH);
749 psa_set_key_algorithm(&attributes, psa_sig_md);
750
751 ret = mbedtls_ecp_point_write_binary(&ctx->grp, &ctx->Q,
752 MBEDTLS_ECP_PF_UNCOMPRESSED,
753 &key_len, buf, sizeof(buf));
754 if (ret != 0) {
755 goto cleanup;
756 }
757
758 status = psa_import_key(&attributes,
759 buf, key_len,
760 &key_id);
761 if (status != PSA_SUCCESS) {
762 ret = PSA_PK_TO_MBEDTLS_ERR(status);
763 goto cleanup;
764 }
765
766 /* We don't need the exported key anymore and can
767 * reuse its buffer for signature extraction. */
768 if (2 * signature_part_size > sizeof(buf)) {
769 ret = MBEDTLS_ERR_PK_BAD_INPUT_DATA;
770 goto cleanup;
771 }
772
773 p = (unsigned char *) sig;
774 if ((ret = extract_ecdsa_sig(&p, sig + sig_len, buf,
775 signature_part_size)) != 0) {
776 goto cleanup;
777 }
778
779 status = psa_verify_hash(key_id, psa_sig_md,
780 hash, hash_len,
781 buf, 2 * signature_part_size);
782 if (status != PSA_SUCCESS) {
783 ret = PSA_PK_ECDSA_TO_MBEDTLS_ERR(status);
784 goto cleanup;
785 }
786
787 if (p != sig + sig_len) {
788 ret = MBEDTLS_ERR_PK_SIG_LEN_MISMATCH;
789 goto cleanup;
790 }
791 ret = 0;
792
793 cleanup:
794 status = psa_destroy_key(key_id);
795 if (ret == 0 && status != PSA_SUCCESS) {
796 ret = PSA_PK_TO_MBEDTLS_ERR(status);
797 }
798
799 return ret;
800 }
801 #else /* MBEDTLS_USE_PSA_CRYPTO */
ecdsa_verify_wrap(void * ctx,mbedtls_md_type_t md_alg,const unsigned char * hash,size_t hash_len,const unsigned char * sig,size_t sig_len)802 static int ecdsa_verify_wrap(void *ctx, mbedtls_md_type_t md_alg,
803 const unsigned char *hash, size_t hash_len,
804 const unsigned char *sig, size_t sig_len)
805 {
806 int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
807 ((void) md_alg);
808
809 ret = mbedtls_ecdsa_read_signature((mbedtls_ecdsa_context *) ctx,
810 hash, hash_len, sig, sig_len);
811
812 if (ret == MBEDTLS_ERR_ECP_SIG_LEN_MISMATCH) {
813 return MBEDTLS_ERR_PK_SIG_LEN_MISMATCH;
814 }
815
816 return ret;
817 }
818 #endif /* MBEDTLS_USE_PSA_CRYPTO */
819 #endif /* MBEDTLS_PK_CAN_ECDSA_VERIFY */
820
821 #if defined(MBEDTLS_PK_CAN_ECDSA_SIGN)
822 #if defined(MBEDTLS_USE_PSA_CRYPTO)
823 /*
824 * Simultaneously convert and move raw MPI from the beginning of a buffer
825 * to an ASN.1 MPI at the end of the buffer.
826 * See also mbedtls_asn1_write_mpi().
827 *
828 * p: pointer to the end of the output buffer
829 * start: start of the output buffer, and also of the mpi to write at the end
830 * n_len: length of the mpi to read from start
831 */
asn1_write_mpibuf(unsigned char ** p,unsigned char * start,size_t n_len)832 static int asn1_write_mpibuf(unsigned char **p, unsigned char *start,
833 size_t n_len)
834 {
835 int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
836 size_t len = 0;
837
838 if ((size_t) (*p - start) < n_len) {
839 return MBEDTLS_ERR_ASN1_BUF_TOO_SMALL;
840 }
841
842 len = n_len;
843 *p -= len;
844 memmove(*p, start, len);
845
846 /* ASN.1 DER encoding requires minimal length, so skip leading 0s.
847 * Neither r nor s should be 0, but as a failsafe measure, still detect
848 * that rather than overflowing the buffer in case of a PSA error. */
849 while (len > 0 && **p == 0x00) {
850 ++(*p);
851 --len;
852 }
853
854 /* this is only reached if the signature was invalid */
855 if (len == 0) {
856 return MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED;
857 }
858
859 /* if the msb is 1, ASN.1 requires that we prepend a 0.
860 * Neither r nor s can be 0, so we can assume len > 0 at all times. */
861 if (**p & 0x80) {
862 if (*p - start < 1) {
863 return MBEDTLS_ERR_ASN1_BUF_TOO_SMALL;
864 }
865
866 *--(*p) = 0x00;
867 len += 1;
868 }
869
870 MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(p, start, len));
871 MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_tag(p, start,
872 MBEDTLS_ASN1_INTEGER));
873
874 return (int) len;
875 }
876
877 /* Transcode signature from PSA format to ASN.1 sequence.
878 * See ecdsa_signature_to_asn1 in ecdsa.c, but with byte buffers instead of
879 * MPIs, and in-place.
880 *
881 * [in/out] sig: the signature pre- and post-transcoding
882 * [in/out] sig_len: signature length pre- and post-transcoding
883 * [int] buf_len: the available size the in/out buffer
884 */
pk_ecdsa_sig_asn1_from_psa(unsigned char * sig,size_t * sig_len,size_t buf_len)885 static int pk_ecdsa_sig_asn1_from_psa(unsigned char *sig, size_t *sig_len,
886 size_t buf_len)
887 {
888 int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
889 size_t len = 0;
890 const size_t rs_len = *sig_len / 2;
891 unsigned char *p = sig + buf_len;
892
893 MBEDTLS_ASN1_CHK_ADD(len, asn1_write_mpibuf(&p, sig + rs_len, rs_len));
894 MBEDTLS_ASN1_CHK_ADD(len, asn1_write_mpibuf(&p, sig, rs_len));
895
896 MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(&p, sig, len));
897 MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_tag(&p, sig,
898 MBEDTLS_ASN1_CONSTRUCTED |
899 MBEDTLS_ASN1_SEQUENCE));
900
901 memmove(sig, p, len);
902 *sig_len = len;
903
904 return 0;
905 }
906
ecdsa_sign_wrap(void * ctx_arg,mbedtls_md_type_t md_alg,const unsigned char * hash,size_t hash_len,unsigned char * sig,size_t sig_size,size_t * sig_len,int (* f_rng)(void *,unsigned char *,size_t),void * p_rng)907 static int ecdsa_sign_wrap(void *ctx_arg, mbedtls_md_type_t md_alg,
908 const unsigned char *hash, size_t hash_len,
909 unsigned char *sig, size_t sig_size, size_t *sig_len,
910 int (*f_rng)(void *, unsigned char *, size_t), void *p_rng)
911 {
912 mbedtls_ecp_keypair *ctx = ctx_arg;
913 int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
914 psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
915 mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT;
916 psa_status_t status;
917 unsigned char buf[MBEDTLS_PSA_MAX_EC_KEY_PAIR_LENGTH];
918 #if defined(MBEDTLS_ECDSA_DETERMINISTIC)
919 psa_algorithm_t psa_sig_md =
920 PSA_ALG_DETERMINISTIC_ECDSA(mbedtls_hash_info_psa_from_md(md_alg));
921 #else
922 psa_algorithm_t psa_sig_md =
923 PSA_ALG_ECDSA(mbedtls_hash_info_psa_from_md(md_alg));
924 #endif
925 size_t curve_bits;
926 psa_ecc_family_t curve =
927 mbedtls_ecc_group_to_psa(ctx->grp.id, &curve_bits);
928 size_t key_len = PSA_BITS_TO_BYTES(curve_bits);
929
930 /* PSA has its own RNG */
931 ((void) f_rng);
932 ((void) p_rng);
933
934 if (curve == 0) {
935 return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
936 }
937
938 if (key_len > sizeof(buf)) {
939 return MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
940 }
941 ret = mbedtls_mpi_write_binary(&ctx->d, buf, key_len);
942 if (ret != 0) {
943 goto cleanup;
944 }
945
946 psa_set_key_type(&attributes, PSA_KEY_TYPE_ECC_KEY_PAIR(curve));
947 psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_SIGN_HASH);
948 psa_set_key_algorithm(&attributes, psa_sig_md);
949
950 status = psa_import_key(&attributes,
951 buf, key_len,
952 &key_id);
953 if (status != PSA_SUCCESS) {
954 ret = PSA_PK_TO_MBEDTLS_ERR(status);
955 goto cleanup;
956 }
957
958 status = psa_sign_hash(key_id, psa_sig_md, hash, hash_len,
959 sig, sig_size, sig_len);
960 if (status != PSA_SUCCESS) {
961 ret = PSA_PK_ECDSA_TO_MBEDTLS_ERR(status);
962 goto cleanup;
963 }
964
965 ret = pk_ecdsa_sig_asn1_from_psa(sig, sig_len, sig_size);
966
967 cleanup:
968 mbedtls_platform_zeroize(buf, sizeof(buf));
969 status = psa_destroy_key(key_id);
970 if (ret == 0 && status != PSA_SUCCESS) {
971 ret = PSA_PK_TO_MBEDTLS_ERR(status);
972 }
973
974 return ret;
975 }
976 #else /* MBEDTLS_USE_PSA_CRYPTO */
ecdsa_sign_wrap(void * ctx,mbedtls_md_type_t md_alg,const unsigned char * hash,size_t hash_len,unsigned char * sig,size_t sig_size,size_t * sig_len,int (* f_rng)(void *,unsigned char *,size_t),void * p_rng)977 static int ecdsa_sign_wrap(void *ctx, mbedtls_md_type_t md_alg,
978 const unsigned char *hash, size_t hash_len,
979 unsigned char *sig, size_t sig_size, size_t *sig_len,
980 int (*f_rng)(void *, unsigned char *, size_t), void *p_rng)
981 {
982 return mbedtls_ecdsa_write_signature((mbedtls_ecdsa_context *) ctx,
983 md_alg, hash, hash_len,
984 sig, sig_size, sig_len,
985 f_rng, p_rng);
986 }
987 #endif /* MBEDTLS_USE_PSA_CRYPTO */
988 #endif /* MBEDTLS_PK_CAN_ECDSA_SIGN */
989
990 #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
991 /* Forward declarations */
992 static int ecdsa_verify_rs_wrap(void *ctx, mbedtls_md_type_t md_alg,
993 const unsigned char *hash, size_t hash_len,
994 const unsigned char *sig, size_t sig_len,
995 void *rs_ctx);
996
997 static int ecdsa_sign_rs_wrap(void *ctx, mbedtls_md_type_t md_alg,
998 const unsigned char *hash, size_t hash_len,
999 unsigned char *sig, size_t sig_size, size_t *sig_len,
1000 int (*f_rng)(void *, unsigned char *, size_t), void *p_rng,
1001 void *rs_ctx);
1002
1003 /*
1004 * Restart context for ECDSA operations with ECKEY context
1005 *
1006 * We need to store an actual ECDSA context, as we need to pass the same to
1007 * the underlying ecdsa function, so we can't create it on the fly every time.
1008 */
1009 typedef struct {
1010 mbedtls_ecdsa_restart_ctx ecdsa_rs;
1011 mbedtls_ecdsa_context ecdsa_ctx;
1012 } eckey_restart_ctx;
1013
eckey_rs_alloc(void)1014 static void *eckey_rs_alloc(void)
1015 {
1016 eckey_restart_ctx *rs_ctx;
1017
1018 void *ctx = mbedtls_calloc(1, sizeof(eckey_restart_ctx));
1019
1020 if (ctx != NULL) {
1021 rs_ctx = ctx;
1022 mbedtls_ecdsa_restart_init(&rs_ctx->ecdsa_rs);
1023 mbedtls_ecdsa_init(&rs_ctx->ecdsa_ctx);
1024 }
1025
1026 return ctx;
1027 }
1028
eckey_rs_free(void * ctx)1029 static void eckey_rs_free(void *ctx)
1030 {
1031 eckey_restart_ctx *rs_ctx;
1032
1033 if (ctx == NULL) {
1034 return;
1035 }
1036
1037 rs_ctx = ctx;
1038 mbedtls_ecdsa_restart_free(&rs_ctx->ecdsa_rs);
1039 mbedtls_ecdsa_free(&rs_ctx->ecdsa_ctx);
1040
1041 mbedtls_free(ctx);
1042 }
1043
eckey_verify_rs_wrap(void * ctx,mbedtls_md_type_t md_alg,const unsigned char * hash,size_t hash_len,const unsigned char * sig,size_t sig_len,void * rs_ctx)1044 static int eckey_verify_rs_wrap(void *ctx, mbedtls_md_type_t md_alg,
1045 const unsigned char *hash, size_t hash_len,
1046 const unsigned char *sig, size_t sig_len,
1047 void *rs_ctx)
1048 {
1049 int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
1050 eckey_restart_ctx *rs = rs_ctx;
1051
1052 /* Should never happen */
1053 if (rs == NULL) {
1054 return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
1055 }
1056
1057 /* set up our own sub-context if needed (that is, on first run) */
1058 if (rs->ecdsa_ctx.grp.pbits == 0) {
1059 MBEDTLS_MPI_CHK(mbedtls_ecdsa_from_keypair(&rs->ecdsa_ctx, ctx));
1060 }
1061
1062 MBEDTLS_MPI_CHK(ecdsa_verify_rs_wrap(&rs->ecdsa_ctx,
1063 md_alg, hash, hash_len,
1064 sig, sig_len, &rs->ecdsa_rs));
1065
1066 cleanup:
1067 return ret;
1068 }
1069
eckey_sign_rs_wrap(void * ctx,mbedtls_md_type_t md_alg,const unsigned char * hash,size_t hash_len,unsigned char * sig,size_t sig_size,size_t * sig_len,int (* f_rng)(void *,unsigned char *,size_t),void * p_rng,void * rs_ctx)1070 static int eckey_sign_rs_wrap(void *ctx, mbedtls_md_type_t md_alg,
1071 const unsigned char *hash, size_t hash_len,
1072 unsigned char *sig, size_t sig_size, size_t *sig_len,
1073 int (*f_rng)(void *, unsigned char *, size_t), void *p_rng,
1074 void *rs_ctx)
1075 {
1076 int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
1077 eckey_restart_ctx *rs = rs_ctx;
1078
1079 /* Should never happen */
1080 if (rs == NULL) {
1081 return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
1082 }
1083
1084 /* set up our own sub-context if needed (that is, on first run) */
1085 if (rs->ecdsa_ctx.grp.pbits == 0) {
1086 MBEDTLS_MPI_CHK(mbedtls_ecdsa_from_keypair(&rs->ecdsa_ctx, ctx));
1087 }
1088
1089 MBEDTLS_MPI_CHK(ecdsa_sign_rs_wrap(&rs->ecdsa_ctx, md_alg,
1090 hash, hash_len, sig, sig_size, sig_len,
1091 f_rng, p_rng, &rs->ecdsa_rs));
1092
1093 cleanup:
1094 return ret;
1095 }
1096 #endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */
1097
eckey_check_pair(const void * pub,const void * prv,int (* f_rng)(void *,unsigned char *,size_t),void * p_rng)1098 static int eckey_check_pair(const void *pub, const void *prv,
1099 int (*f_rng)(void *, unsigned char *, size_t),
1100 void *p_rng)
1101 {
1102 return mbedtls_ecp_check_pub_priv((const mbedtls_ecp_keypair *) pub,
1103 (const mbedtls_ecp_keypair *) prv,
1104 f_rng, p_rng);
1105 }
1106
eckey_alloc_wrap(void)1107 static void *eckey_alloc_wrap(void)
1108 {
1109 void *ctx = mbedtls_calloc(1, sizeof(mbedtls_ecp_keypair));
1110
1111 if (ctx != NULL) {
1112 mbedtls_ecp_keypair_init(ctx);
1113 }
1114
1115 return ctx;
1116 }
1117
eckey_free_wrap(void * ctx)1118 static void eckey_free_wrap(void *ctx)
1119 {
1120 mbedtls_ecp_keypair_free((mbedtls_ecp_keypair *) ctx);
1121 mbedtls_free(ctx);
1122 }
1123
eckey_debug(const void * ctx,mbedtls_pk_debug_item * items)1124 static void eckey_debug(const void *ctx, mbedtls_pk_debug_item *items)
1125 {
1126 items->type = MBEDTLS_PK_DEBUG_ECP;
1127 items->name = "eckey.Q";
1128 items->value = &(((mbedtls_ecp_keypair *) ctx)->Q);
1129 }
1130
1131 const mbedtls_pk_info_t mbedtls_eckey_info = {
1132 MBEDTLS_PK_ECKEY,
1133 "EC",
1134 eckey_get_bitlen,
1135 eckey_can_do,
1136 #if defined(MBEDTLS_PK_CAN_ECDSA_VERIFY)
1137 ecdsa_verify_wrap, /* Compatible key structures */
1138 #else
1139 NULL,
1140 #endif
1141 #if defined(MBEDTLS_PK_CAN_ECDSA_SIGN)
1142 ecdsa_sign_wrap, /* Compatible key structures */
1143 #else
1144 NULL,
1145 #endif
1146 #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
1147 eckey_verify_rs_wrap,
1148 eckey_sign_rs_wrap,
1149 #endif
1150 NULL,
1151 NULL,
1152 eckey_check_pair,
1153 eckey_alloc_wrap,
1154 eckey_free_wrap,
1155 #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
1156 eckey_rs_alloc,
1157 eckey_rs_free,
1158 #endif
1159 eckey_debug,
1160 };
1161
1162 /*
1163 * EC key restricted to ECDH
1164 */
eckeydh_can_do(mbedtls_pk_type_t type)1165 static int eckeydh_can_do(mbedtls_pk_type_t type)
1166 {
1167 return type == MBEDTLS_PK_ECKEY ||
1168 type == MBEDTLS_PK_ECKEY_DH;
1169 }
1170
1171 const mbedtls_pk_info_t mbedtls_eckeydh_info = {
1172 MBEDTLS_PK_ECKEY_DH,
1173 "EC_DH",
1174 eckey_get_bitlen, /* Same underlying key structure */
1175 eckeydh_can_do,
1176 NULL,
1177 NULL,
1178 #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
1179 NULL,
1180 NULL,
1181 #endif
1182 NULL,
1183 NULL,
1184 eckey_check_pair,
1185 eckey_alloc_wrap, /* Same underlying key structure */
1186 eckey_free_wrap, /* Same underlying key structure */
1187 #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
1188 NULL,
1189 NULL,
1190 #endif
1191 eckey_debug, /* Same underlying key structure */
1192 };
1193 #endif /* MBEDTLS_ECP_C */
1194
1195 #if defined(MBEDTLS_PK_CAN_ECDSA_SOME)
ecdsa_can_do(mbedtls_pk_type_t type)1196 static int ecdsa_can_do(mbedtls_pk_type_t type)
1197 {
1198 return type == MBEDTLS_PK_ECDSA;
1199 }
1200
1201 #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
ecdsa_verify_rs_wrap(void * ctx,mbedtls_md_type_t md_alg,const unsigned char * hash,size_t hash_len,const unsigned char * sig,size_t sig_len,void * rs_ctx)1202 static int ecdsa_verify_rs_wrap(void *ctx, mbedtls_md_type_t md_alg,
1203 const unsigned char *hash, size_t hash_len,
1204 const unsigned char *sig, size_t sig_len,
1205 void *rs_ctx)
1206 {
1207 int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
1208 ((void) md_alg);
1209
1210 ret = mbedtls_ecdsa_read_signature_restartable(
1211 (mbedtls_ecdsa_context *) ctx,
1212 hash, hash_len, sig, sig_len,
1213 (mbedtls_ecdsa_restart_ctx *) rs_ctx);
1214
1215 if (ret == MBEDTLS_ERR_ECP_SIG_LEN_MISMATCH) {
1216 return MBEDTLS_ERR_PK_SIG_LEN_MISMATCH;
1217 }
1218
1219 return ret;
1220 }
1221
ecdsa_sign_rs_wrap(void * ctx,mbedtls_md_type_t md_alg,const unsigned char * hash,size_t hash_len,unsigned char * sig,size_t sig_size,size_t * sig_len,int (* f_rng)(void *,unsigned char *,size_t),void * p_rng,void * rs_ctx)1222 static int ecdsa_sign_rs_wrap(void *ctx, mbedtls_md_type_t md_alg,
1223 const unsigned char *hash, size_t hash_len,
1224 unsigned char *sig, size_t sig_size, size_t *sig_len,
1225 int (*f_rng)(void *, unsigned char *, size_t), void *p_rng,
1226 void *rs_ctx)
1227 {
1228 return mbedtls_ecdsa_write_signature_restartable(
1229 (mbedtls_ecdsa_context *) ctx,
1230 md_alg, hash, hash_len, sig, sig_size, sig_len, f_rng, p_rng,
1231 (mbedtls_ecdsa_restart_ctx *) rs_ctx);
1232
1233 }
1234
ecdsa_rs_alloc(void)1235 static void *ecdsa_rs_alloc(void)
1236 {
1237 void *ctx = mbedtls_calloc(1, sizeof(mbedtls_ecdsa_restart_ctx));
1238
1239 if (ctx != NULL) {
1240 mbedtls_ecdsa_restart_init(ctx);
1241 }
1242
1243 return ctx;
1244 }
1245
ecdsa_rs_free(void * ctx)1246 static void ecdsa_rs_free(void *ctx)
1247 {
1248 mbedtls_ecdsa_restart_free(ctx);
1249 mbedtls_free(ctx);
1250 }
1251 #endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */
1252
1253 const mbedtls_pk_info_t mbedtls_ecdsa_info = {
1254 MBEDTLS_PK_ECDSA,
1255 "ECDSA",
1256 eckey_get_bitlen, /* Compatible key structures */
1257 ecdsa_can_do,
1258 #if defined(MBEDTLS_PK_CAN_ECDSA_VERIFY)
1259 ecdsa_verify_wrap, /* Compatible key structures */
1260 #else
1261 NULL,
1262 #endif
1263 #if defined(MBEDTLS_PK_CAN_ECDSA_SIGN)
1264 ecdsa_sign_wrap, /* Compatible key structures */
1265 #else
1266 NULL,
1267 #endif
1268 #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
1269 ecdsa_verify_rs_wrap,
1270 ecdsa_sign_rs_wrap,
1271 #endif
1272 NULL,
1273 NULL,
1274 eckey_check_pair, /* Compatible key structures */
1275 eckey_alloc_wrap, /* Compatible key structures */
1276 eckey_free_wrap, /* Compatible key structures */
1277 #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
1278 ecdsa_rs_alloc,
1279 ecdsa_rs_free,
1280 #endif
1281 eckey_debug, /* Compatible key structures */
1282 };
1283 #endif /* MBEDTLS_PK_CAN_ECDSA_SOME */
1284
1285 #if defined(MBEDTLS_PK_RSA_ALT_SUPPORT)
1286 /*
1287 * Support for alternative RSA-private implementations
1288 */
1289
rsa_alt_can_do(mbedtls_pk_type_t type)1290 static int rsa_alt_can_do(mbedtls_pk_type_t type)
1291 {
1292 return type == MBEDTLS_PK_RSA;
1293 }
1294
rsa_alt_get_bitlen(const void * ctx)1295 static size_t rsa_alt_get_bitlen(const void *ctx)
1296 {
1297 const mbedtls_rsa_alt_context *rsa_alt = (const mbedtls_rsa_alt_context *) ctx;
1298
1299 return 8 * rsa_alt->key_len_func(rsa_alt->key);
1300 }
1301
rsa_alt_sign_wrap(void * ctx,mbedtls_md_type_t md_alg,const unsigned char * hash,size_t hash_len,unsigned char * sig,size_t sig_size,size_t * sig_len,int (* f_rng)(void *,unsigned char *,size_t),void * p_rng)1302 static int rsa_alt_sign_wrap(void *ctx, mbedtls_md_type_t md_alg,
1303 const unsigned char *hash, size_t hash_len,
1304 unsigned char *sig, size_t sig_size, size_t *sig_len,
1305 int (*f_rng)(void *, unsigned char *, size_t), void *p_rng)
1306 {
1307 mbedtls_rsa_alt_context *rsa_alt = (mbedtls_rsa_alt_context *) ctx;
1308
1309 if (UINT_MAX < hash_len) {
1310 return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
1311 }
1312
1313 *sig_len = rsa_alt->key_len_func(rsa_alt->key);
1314 if (*sig_len > MBEDTLS_PK_SIGNATURE_MAX_SIZE) {
1315 return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
1316 }
1317 if (*sig_len > sig_size) {
1318 return MBEDTLS_ERR_PK_BUFFER_TOO_SMALL;
1319 }
1320
1321 return rsa_alt->sign_func(rsa_alt->key, f_rng, p_rng,
1322 md_alg, (unsigned int) hash_len, hash, sig);
1323 }
1324
rsa_alt_decrypt_wrap(void * ctx,const unsigned char * input,size_t ilen,unsigned char * output,size_t * olen,size_t osize,int (* f_rng)(void *,unsigned char *,size_t),void * p_rng)1325 static int rsa_alt_decrypt_wrap(void *ctx,
1326 const unsigned char *input, size_t ilen,
1327 unsigned char *output, size_t *olen, size_t osize,
1328 int (*f_rng)(void *, unsigned char *, size_t), void *p_rng)
1329 {
1330 mbedtls_rsa_alt_context *rsa_alt = (mbedtls_rsa_alt_context *) ctx;
1331
1332 ((void) f_rng);
1333 ((void) p_rng);
1334
1335 if (ilen != rsa_alt->key_len_func(rsa_alt->key)) {
1336 return MBEDTLS_ERR_RSA_BAD_INPUT_DATA;
1337 }
1338
1339 return rsa_alt->decrypt_func(rsa_alt->key,
1340 olen, input, output, osize);
1341 }
1342
1343 #if defined(MBEDTLS_RSA_C)
rsa_alt_check_pair(const void * pub,const void * prv,int (* f_rng)(void *,unsigned char *,size_t),void * p_rng)1344 static int rsa_alt_check_pair(const void *pub, const void *prv,
1345 int (*f_rng)(void *, unsigned char *, size_t),
1346 void *p_rng)
1347 {
1348 unsigned char sig[MBEDTLS_MPI_MAX_SIZE];
1349 unsigned char hash[32];
1350 size_t sig_len = 0;
1351 int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
1352
1353 if (rsa_alt_get_bitlen(prv) != rsa_get_bitlen(pub)) {
1354 return MBEDTLS_ERR_RSA_KEY_CHECK_FAILED;
1355 }
1356
1357 memset(hash, 0x2a, sizeof(hash));
1358
1359 if ((ret = rsa_alt_sign_wrap((void *) prv, MBEDTLS_MD_NONE,
1360 hash, sizeof(hash),
1361 sig, sizeof(sig), &sig_len,
1362 f_rng, p_rng)) != 0) {
1363 return ret;
1364 }
1365
1366 if (rsa_verify_wrap((void *) pub, MBEDTLS_MD_NONE,
1367 hash, sizeof(hash), sig, sig_len) != 0) {
1368 return MBEDTLS_ERR_RSA_KEY_CHECK_FAILED;
1369 }
1370
1371 return 0;
1372 }
1373 #endif /* MBEDTLS_RSA_C */
1374
rsa_alt_alloc_wrap(void)1375 static void *rsa_alt_alloc_wrap(void)
1376 {
1377 void *ctx = mbedtls_calloc(1, sizeof(mbedtls_rsa_alt_context));
1378
1379 if (ctx != NULL) {
1380 memset(ctx, 0, sizeof(mbedtls_rsa_alt_context));
1381 }
1382
1383 return ctx;
1384 }
1385
rsa_alt_free_wrap(void * ctx)1386 static void rsa_alt_free_wrap(void *ctx)
1387 {
1388 mbedtls_platform_zeroize(ctx, sizeof(mbedtls_rsa_alt_context));
1389 mbedtls_free(ctx);
1390 }
1391
1392 const mbedtls_pk_info_t mbedtls_rsa_alt_info = {
1393 MBEDTLS_PK_RSA_ALT,
1394 "RSA-alt",
1395 rsa_alt_get_bitlen,
1396 rsa_alt_can_do,
1397 NULL,
1398 rsa_alt_sign_wrap,
1399 #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
1400 NULL,
1401 NULL,
1402 #endif
1403 rsa_alt_decrypt_wrap,
1404 NULL,
1405 #if defined(MBEDTLS_RSA_C)
1406 rsa_alt_check_pair,
1407 #else
1408 NULL,
1409 #endif
1410 rsa_alt_alloc_wrap,
1411 rsa_alt_free_wrap,
1412 #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
1413 NULL,
1414 NULL,
1415 #endif
1416 NULL,
1417 };
1418
1419 #endif /* MBEDTLS_PK_RSA_ALT_SUPPORT */
1420
1421 #if defined(MBEDTLS_USE_PSA_CRYPTO)
1422
pk_opaque_alloc_wrap(void)1423 static void *pk_opaque_alloc_wrap(void)
1424 {
1425 void *ctx = mbedtls_calloc(1, sizeof(mbedtls_svc_key_id_t));
1426
1427 /* no _init() function to call, as calloc() already zeroized */
1428
1429 return ctx;
1430 }
1431
pk_opaque_free_wrap(void * ctx)1432 static void pk_opaque_free_wrap(void *ctx)
1433 {
1434 mbedtls_platform_zeroize(ctx, sizeof(mbedtls_svc_key_id_t));
1435 mbedtls_free(ctx);
1436 }
1437
pk_opaque_get_bitlen(const void * ctx)1438 static size_t pk_opaque_get_bitlen(const void *ctx)
1439 {
1440 const mbedtls_svc_key_id_t *key = (const mbedtls_svc_key_id_t *) ctx;
1441 size_t bits;
1442 psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
1443
1444 if (PSA_SUCCESS != psa_get_key_attributes(*key, &attributes)) {
1445 return 0;
1446 }
1447
1448 bits = psa_get_key_bits(&attributes);
1449 psa_reset_key_attributes(&attributes);
1450 return bits;
1451 }
1452
pk_opaque_ecdsa_can_do(mbedtls_pk_type_t type)1453 static int pk_opaque_ecdsa_can_do(mbedtls_pk_type_t type)
1454 {
1455 return type == MBEDTLS_PK_ECKEY ||
1456 type == MBEDTLS_PK_ECDSA;
1457 }
1458
pk_opaque_rsa_can_do(mbedtls_pk_type_t type)1459 static int pk_opaque_rsa_can_do(mbedtls_pk_type_t type)
1460 {
1461 return type == MBEDTLS_PK_RSA ||
1462 type == MBEDTLS_PK_RSASSA_PSS;
1463 }
1464
pk_opaque_sign_wrap(void * ctx,mbedtls_md_type_t md_alg,const unsigned char * hash,size_t hash_len,unsigned char * sig,size_t sig_size,size_t * sig_len,int (* f_rng)(void *,unsigned char *,size_t),void * p_rng)1465 static int pk_opaque_sign_wrap(void *ctx, mbedtls_md_type_t md_alg,
1466 const unsigned char *hash, size_t hash_len,
1467 unsigned char *sig, size_t sig_size, size_t *sig_len,
1468 int (*f_rng)(void *, unsigned char *, size_t), void *p_rng)
1469 {
1470 #if !defined(MBEDTLS_PK_CAN_ECDSA_SIGN) && !defined(MBEDTLS_RSA_C)
1471 ((void) ctx);
1472 ((void) md_alg);
1473 ((void) hash);
1474 ((void) hash_len);
1475 ((void) sig);
1476 ((void) sig_size);
1477 ((void) sig_len);
1478 ((void) f_rng);
1479 ((void) p_rng);
1480 return MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE;
1481 #else /* !MBEDTLS_PK_CAN_ECDSA_SIGN && !MBEDTLS_RSA_C */
1482 const mbedtls_svc_key_id_t *key = (const mbedtls_svc_key_id_t *) ctx;
1483 psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
1484 psa_algorithm_t alg;
1485 psa_key_type_t type;
1486 psa_status_t status;
1487
1488 /* PSA has its own RNG */
1489 (void) f_rng;
1490 (void) p_rng;
1491
1492 status = psa_get_key_attributes(*key, &attributes);
1493 if (status != PSA_SUCCESS) {
1494 return PSA_PK_TO_MBEDTLS_ERR(status);
1495 }
1496
1497 type = psa_get_key_type(&attributes);
1498 psa_reset_key_attributes(&attributes);
1499
1500 #if defined(MBEDTLS_PK_CAN_ECDSA_SIGN)
1501 if (PSA_KEY_TYPE_IS_ECC_KEY_PAIR(type)) {
1502 alg = PSA_ALG_ECDSA(mbedtls_hash_info_psa_from_md(md_alg));
1503 } else
1504 #endif /* MBEDTLS_PK_CAN_ECDSA_SIGN */
1505 #if defined(MBEDTLS_RSA_C)
1506 if (PSA_KEY_TYPE_IS_RSA(type)) {
1507 alg = PSA_ALG_RSA_PKCS1V15_SIGN(mbedtls_hash_info_psa_from_md(md_alg));
1508 } else
1509 #endif /* MBEDTLS_RSA_C */
1510 return MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE;
1511
1512 /* make the signature */
1513 status = psa_sign_hash(*key, alg, hash, hash_len,
1514 sig, sig_size, sig_len);
1515 if (status != PSA_SUCCESS) {
1516 #if defined(MBEDTLS_PK_CAN_ECDSA_SIGN)
1517 if (PSA_KEY_TYPE_IS_ECC_KEY_PAIR(type)) {
1518 return PSA_PK_ECDSA_TO_MBEDTLS_ERR(status);
1519 } else
1520 #endif /* MBEDTLS_PK_CAN_ECDSA_SIGN */
1521 #if defined(MBEDTLS_RSA_C)
1522 if (PSA_KEY_TYPE_IS_RSA(type)) {
1523 return PSA_PK_RSA_TO_MBEDTLS_ERR(status);
1524 } else
1525 #endif /* MBEDTLS_RSA_C */
1526 return PSA_PK_TO_MBEDTLS_ERR(status);
1527 }
1528
1529 #if defined(MBEDTLS_PK_CAN_ECDSA_SIGN)
1530 if (PSA_KEY_TYPE_IS_ECC_KEY_PAIR(type)) {
1531 /* transcode it to ASN.1 sequence */
1532 return pk_ecdsa_sig_asn1_from_psa(sig, sig_len, sig_size);
1533 }
1534 #endif /* MBEDTLS_PK_CAN_ECDSA_SIGN */
1535
1536 return 0;
1537 #endif /* !MBEDTLS_PK_CAN_ECDSA_SIGN && !MBEDTLS_RSA_C */
1538 }
1539
1540 const mbedtls_pk_info_t mbedtls_pk_ecdsa_opaque_info = {
1541 MBEDTLS_PK_OPAQUE,
1542 "Opaque",
1543 pk_opaque_get_bitlen,
1544 pk_opaque_ecdsa_can_do,
1545 NULL, /* verify - will be done later */
1546 pk_opaque_sign_wrap,
1547 #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
1548 NULL, /* restartable verify - not relevant */
1549 NULL, /* restartable sign - not relevant */
1550 #endif
1551 NULL, /* decrypt - not relevant */
1552 NULL, /* encrypt - not relevant */
1553 NULL, /* check_pair - could be done later or left NULL */
1554 pk_opaque_alloc_wrap,
1555 pk_opaque_free_wrap,
1556 #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
1557 NULL, /* restart alloc - not relevant */
1558 NULL, /* restart free - not relevant */
1559 #endif
1560 NULL, /* debug - could be done later, or even left NULL */
1561 };
1562
1563 #if defined(PSA_WANT_KEY_TYPE_RSA_KEY_PAIR)
pk_opaque_rsa_decrypt(void * ctx,const unsigned char * input,size_t ilen,unsigned char * output,size_t * olen,size_t osize,int (* f_rng)(void *,unsigned char *,size_t),void * p_rng)1564 static int pk_opaque_rsa_decrypt(void *ctx,
1565 const unsigned char *input, size_t ilen,
1566 unsigned char *output, size_t *olen, size_t osize,
1567 int (*f_rng)(void *, unsigned char *, size_t), void *p_rng)
1568 {
1569 const mbedtls_svc_key_id_t *key = (const mbedtls_svc_key_id_t *) ctx;
1570 psa_status_t status;
1571
1572 /* PSA has its own RNG */
1573 (void) f_rng;
1574 (void) p_rng;
1575
1576 status = psa_asymmetric_decrypt(*key, PSA_ALG_RSA_PKCS1V15_CRYPT,
1577 input, ilen,
1578 NULL, 0,
1579 output, osize, olen);
1580 if (status != PSA_SUCCESS) {
1581 return PSA_PK_RSA_TO_MBEDTLS_ERR(status);
1582 }
1583
1584 return 0;
1585 }
1586 #endif /* PSA_WANT_KEY_TYPE_RSA_KEY_PAIR */
1587
1588 const mbedtls_pk_info_t mbedtls_pk_rsa_opaque_info = {
1589 MBEDTLS_PK_OPAQUE,
1590 "Opaque",
1591 pk_opaque_get_bitlen,
1592 pk_opaque_rsa_can_do,
1593 NULL, /* verify - will be done later */
1594 pk_opaque_sign_wrap,
1595 #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
1596 NULL, /* restartable verify - not relevant */
1597 NULL, /* restartable sign - not relevant */
1598 #endif
1599 #if defined(PSA_WANT_KEY_TYPE_RSA_KEY_PAIR)
1600 pk_opaque_rsa_decrypt,
1601 #else
1602 NULL, /* decrypt - not available */
1603 #endif /* PSA_WANT_KEY_TYPE_RSA_PUBLIC_KEY */
1604 NULL, /* encrypt - will be done later */
1605 NULL, /* check_pair - could be done later or left NULL */
1606 pk_opaque_alloc_wrap,
1607 pk_opaque_free_wrap,
1608 #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
1609 NULL, /* restart alloc - not relevant */
1610 NULL, /* restart free - not relevant */
1611 #endif
1612 NULL, /* debug - could be done later, or even left NULL */
1613 };
1614
1615 #endif /* MBEDTLS_USE_PSA_CRYPTO */
1616
1617 #endif /* MBEDTLS_PK_C */
1618
