common/mbedtls/psa_crypto_rsa.c

   1 /*
   2  *  PSA RSA 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_random_impl.h"
  28 #include "psa_crypto_rsa.h"
  29
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include "mbedtls/platform.h"
  33 #if !defined(MBEDTLS_PLATFORM_C)
  34 #define mbedtls_calloc calloc
  35 #define mbedtls_free   free
  36 #endif
  37
  38 #include <mbedtls/rsa.h>
  39 #include <mbedtls/error.h>
  40 #include <mbedtls/pk.h>
  41 #include <mbedtls/pk_internal.h>
  42
  43 #if ( defined(MBEDTLS_PSA_BUILTIN_KEY_TYPE_RSA_KEY_PAIR) ||  \
  44       ( defined(PSA_CRYPTO_DRIVER_TEST) &&                   \
  45         defined(MBEDTLS_PSA_ACCEL_KEY_TYPE_RSA_KEY_PAIR) ) )
  46 #define BUILTIN_KEY_TYPE_RSA_KEY_PAIR    1
  47 #endif
  48
  49 #if ( defined(MBEDTLS_PSA_BUILTIN_KEY_TYPE_RSA_PUBLIC_KEY) ||  \
  50       ( defined(PSA_CRYPTO_DRIVER_TEST) &&                   \
  51         defined(MBEDTLS_PSA_ACCEL_KEY_TYPE_RSA_PUBLIC_KEY) ) )
  52 #define BUILTIN_KEY_TYPE_RSA_PUBLIC_KEY  1
  53 #endif
  54
  55 #if ( defined(MBEDTLS_PSA_BUILTIN_ALG_RSA_PKCS1V15_SIGN) ||  \
  56       ( defined(PSA_CRYPTO_DRIVER_TEST) &&                   \
  57         defined(MBEDTLS_PSA_ACCEL_ALG_RSA_PKCS1V15_SIGN) &&  \
  58         defined(MBEDTLS_RSA_C) && defined(MBEDTLS_PKCS1_V15) ) )
  59 #define BUILTIN_ALG_RSA_PKCS1V15_SIGN  1
  60 #endif
  61
  62 #if ( defined(MBEDTLS_PSA_BUILTIN_ALG_RSA_PSS) ||  \
  63       ( defined(PSA_CRYPTO_DRIVER_TEST) &&         \
  64         defined(MBEDTLS_PSA_ACCEL_ALG_RSA_PSS) &&  \
  65         defined(MBEDTLS_RSA_C) && defined(MBEDTLS_PKCS1_V21) ) )
  66 #define BUILTIN_ALG_RSA_PSS 1
  67 #endif
  68
  69 #if defined(MBEDTLS_PSA_BUILTIN_ALG_RSA_PKCS1V15_CRYPT) || \
  70     defined(MBEDTLS_PSA_BUILTIN_ALG_RSA_OAEP) || \
  71     defined(BUILTIN_ALG_RSA_PKCS1V15_SIGN) || \
  72     defined(BUILTIN_ALG_RSA_PSS) || \
  73     defined(BUILTIN_KEY_TYPE_RSA_KEY_PAIR) || \
  74     defined(BUILTIN_KEY_TYPE_RSA_PUBLIC_KEY)
  75
  76 /* Mbed TLS doesn't support non-byte-aligned key sizes (i.e. key sizes
  77  * that are not a multiple of 8) well. For example, there is only
  78  * mbedtls_rsa_get_len(), which returns a number of bytes, and no
  79  * way to return the exact bit size of a key.
  80  * To keep things simple, reject non-byte-aligned key sizes. */
  81 static psa_status_t psa_check_rsa_key_byte_aligned(
  82     const mbedtls_rsa_context *rsa) {
  83     mbedtls_mpi n;
  84     psa_status_t status;
  85     mbedtls_mpi_init(&n);
  86     status = mbedtls_to_psa_error(
  87                  mbedtls_rsa_export(rsa, &n, NULL, NULL, NULL, NULL));
  88     if (status == PSA_SUCCESS) {
  89         if (mbedtls_mpi_bitlen(&n) % 8 != 0)
  90             status = PSA_ERROR_NOT_SUPPORTED;
  91     }
  92     mbedtls_mpi_free(&n);
  93     return (status);
  94 }
  95
  96 psa_status_t mbedtls_psa_rsa_load_representation(
  97     psa_key_type_t type, const uint8_t *data, size_t data_length,
  98     mbedtls_rsa_context **p_rsa) {
  99     psa_status_t status;
 100     mbedtls_pk_context ctx;
 101     size_t bits;
 102     mbedtls_pk_init(&ctx);
 103
 104     /* Parse the data. */
 105     if (PSA_KEY_TYPE_IS_KEY_PAIR(type))
 106         status = mbedtls_to_psa_error(
 107                      mbedtls_pk_parse_key(&ctx, data, data_length, NULL, 0));
 108     else
 109         status = mbedtls_to_psa_error(
 110                      mbedtls_pk_parse_public_key(&ctx, data, data_length));
 111     if (status != PSA_SUCCESS)
 112         goto exit;
 113
 114     /* We have something that the pkparse module recognizes. If it is a
 115      * valid RSA key, store it. */
 116     if (mbedtls_pk_get_type(&ctx) != MBEDTLS_PK_RSA) {
 117         status = PSA_ERROR_INVALID_ARGUMENT;
 118         goto exit;
 119     }
 120
 121     /* The size of an RSA key doesn't have to be a multiple of 8. Mbed TLS
 122      * supports non-byte-aligned key sizes, but not well. For example,
 123      * mbedtls_rsa_get_len() returns the key size in bytes, not in bits. */
 124     bits = PSA_BYTES_TO_BITS(mbedtls_rsa_get_len(mbedtls_pk_rsa(ctx)));
 125     if (bits > PSA_VENDOR_RSA_MAX_KEY_BITS) {
 126         status = PSA_ERROR_NOT_SUPPORTED;
 127         goto exit;
 128     }
 129     status = psa_check_rsa_key_byte_aligned(mbedtls_pk_rsa(ctx));
 130     if (status != PSA_SUCCESS)
 131         goto exit;
 132
 133     /* Copy out the pointer to the RSA context, and reset the PK context
 134      * such that pk_free doesn't free the RSA context we just grabbed. */
 135     *p_rsa = mbedtls_pk_rsa(ctx);
 136     ctx.pk_info = NULL;
 137
 138 exit:
 139     mbedtls_pk_free(&ctx);
 140     return (status);
 141 }
 142 #endif /* defined(MBEDTLS_PSA_BUILTIN_ALG_RSA_PKCS1V15_CRYPT) ||
 143         * defined(MBEDTLS_PSA_BUILTIN_ALG_RSA_OAEP) ||
 144         * defined(BUILTIN_ALG_RSA_PKCS1V15_SIGN) ||
 145         * defined(BUILTIN_ALG_RSA_PSS) ||
 146         * defined(BUILTIN_KEY_TYPE_RSA_KEY_PAIR) ||
 147         * defined(BUILTIN_KEY_TYPE_RSA_PUBLIC_KEY) */
 148
 149 #if defined(BUILTIN_KEY_TYPE_RSA_KEY_PAIR) || \
 150     defined(BUILTIN_KEY_TYPE_RSA_PUBLIC_KEY)
 151
 152 static psa_status_t rsa_import_key(
 153     const psa_key_attributes_t *attributes,
 154     const uint8_t *data, size_t data_length,
 155     uint8_t *key_buffer, size_t key_buffer_size,
 156     size_t *key_buffer_length, size_t *bits) {
 157     psa_status_t status;
 158     mbedtls_rsa_context *rsa = NULL;
 159
 160     /* Parse input */
 161     status = mbedtls_psa_rsa_load_representation(attributes->core.type,
 162                                                  data,
 163                                                  data_length,
 164                                                  &rsa);
 165     if (status != PSA_SUCCESS)
 166         goto exit;
 167
 168     *bits = (psa_key_bits_t) PSA_BYTES_TO_BITS(mbedtls_rsa_get_len(rsa));
 169
 170     /* Re-export the data to PSA export format, such that we can store export
 171      * representation in the key slot. Export representation in case of RSA is
 172      * the smallest representation that's allowed as input, so a straight-up
 173      * allocation of the same size as the input buffer will be large enough. */
 174     status = mbedtls_psa_rsa_export_key(attributes->core.type,
 175                                         rsa,
 176                                         key_buffer,
 177                                         key_buffer_size,
 178                                         key_buffer_length);
 179 exit:
 180     /* Always free the RSA object */
 181     mbedtls_rsa_free(rsa);
 182     mbedtls_free(rsa);
 183
 184     return (status);
 185 }
 186
 187 psa_status_t mbedtls_psa_rsa_export_key(psa_key_type_t type,
 188                                         mbedtls_rsa_context *rsa,
 189                                         uint8_t *data,
 190                                         size_t data_size,
 191                                         size_t *data_length) {
 192 #if defined(MBEDTLS_PK_WRITE_C)
 193     int ret;
 194     mbedtls_pk_context pk;
 195     uint8_t *pos = data + data_size;
 196
 197     mbedtls_pk_init(&pk);
 198     pk.pk_info = &mbedtls_rsa_info;
 199     pk.pk_ctx = rsa;
 200
 201     /* PSA Crypto API defines the format of an RSA key as a DER-encoded
 202      * representation of the non-encrypted PKCS#1 RSAPrivateKey for a
 203      * private key and of the RFC3279 RSAPublicKey for a public key. */
 204     if (PSA_KEY_TYPE_IS_KEY_PAIR(type))
 205         ret = mbedtls_pk_write_key_der(&pk, data, data_size);
 206     else
 207         ret = mbedtls_pk_write_pubkey(&pos, data, &pk);
 208
 209     if (ret < 0) {
 210         /* Clean up in case pk_write failed halfway through. */
 211         memset(data, 0, data_size);
 212         return (mbedtls_to_psa_error(ret));
 213     }
 214
 215     /* The mbedtls_pk_xxx functions write to the end of the buffer.
 216      * Move the data to the beginning and erase remaining data
 217      * at the original location. */
 218     if (2 * (size_t) ret <= data_size) {
 219         memcpy(data, data + data_size - ret, ret);
 220         memset(data + data_size - ret, 0, ret);
 221     } else if ((size_t) ret < data_size) {
 222         memmove(data, data + data_size - ret, ret);
 223         memset(data + ret, 0, data_size - ret);
 224     }
 225
 226     *data_length = ret;
 227     return (PSA_SUCCESS);
 228 #else
 229     (void) type;
 230     (void) rsa;
 231     (void) data;
 232     (void) data_size;
 233     (void) data_length;
 234     return (PSA_ERROR_NOT_SUPPORTED);
 235 #endif /* MBEDTLS_PK_WRITE_C */
 236 }
 237
 238 static psa_status_t rsa_export_public_key(
 239     const psa_key_attributes_t *attributes,
 240     const uint8_t *key_buffer, size_t key_buffer_size,
 241     uint8_t *data, size_t data_size, size_t *data_length) {
 242     psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
 243     mbedtls_rsa_context *rsa = NULL;
 244
 245     status = mbedtls_psa_rsa_load_representation(
 246                  attributes->core.type, key_buffer, key_buffer_size, &rsa);
 247     if (status != PSA_SUCCESS)
 248         return (status);
 249
 250     status = mbedtls_psa_rsa_export_key(PSA_KEY_TYPE_RSA_PUBLIC_KEY,
 251                                         rsa,
 252                                         data,
 253                                         data_size,
 254                                         data_length);
 255
 256     mbedtls_rsa_free(rsa);
 257     mbedtls_free(rsa);
 258
 259     return (status);
 260 }
 261 #endif /* defined(BUILTIN_KEY_TYPE_RSA_KEY_PAIR) ||
 262         * defined(BUILTIN_KEY_TYPE_RSA_PUBLIC_KEY) */
 263
 264 #if defined(BUILTIN_KEY_TYPE_RSA_KEY_PAIR)
 265 static psa_status_t psa_rsa_read_exponent(const uint8_t *domain_parameters,
 266                                           size_t domain_parameters_size,
 267                                           int *exponent) {
 268     size_t i;
 269     uint32_t acc = 0;
 270
 271     if (domain_parameters_size == 0) {
 272         *exponent = 65537;
 273         return (PSA_SUCCESS);
 274     }
 275
 276     /* Mbed TLS encodes the public exponent as an int. For simplicity, only
 277      * support values that fit in a 32-bit integer, which is larger than
 278      * int on just about every platform anyway. */
 279     if (domain_parameters_size > sizeof(acc))
 280         return (PSA_ERROR_NOT_SUPPORTED);
 281     for (i = 0; i < domain_parameters_size; i++)
 282         acc = (acc << 8) | domain_parameters[i];
 283     if (acc > INT_MAX)
 284         return (PSA_ERROR_NOT_SUPPORTED);
 285     *exponent = acc;
 286     return (PSA_SUCCESS);
 287 }
 288
 289 static psa_status_t rsa_generate_key(
 290     const psa_key_attributes_t *attributes,
 291     uint8_t *key_buffer, size_t key_buffer_size, size_t *key_buffer_length) {
 292     psa_status_t status;
 293     mbedtls_rsa_context rsa;
 294     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 295     int exponent;
 296
 297     status = psa_rsa_read_exponent(attributes->domain_parameters,
 298                                    attributes->domain_parameters_size,
 299                                    &exponent);
 300     if (status != PSA_SUCCESS)
 301         return (status);
 302
 303     mbedtls_rsa_init(&rsa, MBEDTLS_RSA_PKCS_V15, MBEDTLS_MD_NONE);
 304     ret = mbedtls_rsa_gen_key(&rsa,
 305                               mbedtls_psa_get_random,
 306                               MBEDTLS_PSA_RANDOM_STATE,
 307                               (unsigned int)attributes->core.bits,
 308                               exponent);
 309     if (ret != 0)
 310         return (mbedtls_to_psa_error(ret));
 311
 312     status = mbedtls_psa_rsa_export_key(attributes->core.type,
 313                                         &rsa, key_buffer, key_buffer_size,
 314                                         key_buffer_length);
 315     mbedtls_rsa_free(&rsa);
 316
 317     return (status);
 318 }
 319 #endif /* defined(BUILTIN_KEY_TYPE_RSA_KEY_PAIR) */
 320
 321 /****************************************************************/
 322 /* Sign/verify hashes */
 323 /****************************************************************/
 324
 325 #if defined(BUILTIN_ALG_RSA_PKCS1V15_SIGN) || defined(BUILTIN_ALG_RSA_PSS)
 326
 327 /* Decode the hash algorithm from alg and store the mbedtls encoding in
 328  * md_alg. Verify that the hash length is acceptable. */
 329 static psa_status_t psa_rsa_decode_md_type(psa_algorithm_t alg,
 330                                            size_t hash_length,
 331                                            mbedtls_md_type_t *md_alg) {
 332     psa_algorithm_t hash_alg = PSA_ALG_SIGN_GET_HASH(alg);
 333     const mbedtls_md_info_t *md_info = mbedtls_md_info_from_psa(hash_alg);
 334     *md_alg = mbedtls_md_get_type(md_info);
 335
 336     /* The Mbed TLS RSA module uses an unsigned int for hash length
 337      * parameters. Validate that it fits so that we don't risk an
 338      * overflow later. */
 339 #if SIZE_MAX > UINT_MAX
 340     if (hash_length > UINT_MAX)
 341         return (PSA_ERROR_INVALID_ARGUMENT);
 342 #endif
 343
 344 #if defined(BUILTIN_ALG_RSA_PKCS1V15_SIGN)
 345     /* For PKCS#1 v1.5 signature, if using a hash, the hash length
 346      * must be correct. */
 347     if (PSA_ALG_IS_RSA_PKCS1V15_SIGN(alg) &&
 348             alg != PSA_ALG_RSA_PKCS1V15_SIGN_RAW) {
 349         if (md_info == NULL)
 350             return (PSA_ERROR_NOT_SUPPORTED);
 351         if (mbedtls_md_get_size(md_info) != hash_length)
 352             return (PSA_ERROR_INVALID_ARGUMENT);
 353     }
 354 #endif /* BUILTIN_ALG_RSA_PKCS1V15_SIGN */
 355
 356 #if defined(BUILTIN_ALG_RSA_PSS)
 357     /* PSS requires a hash internally. */
 358     if (PSA_ALG_IS_RSA_PSS(alg)) {
 359         if (md_info == NULL)
 360             return (PSA_ERROR_NOT_SUPPORTED);
 361     }
 362 #endif /* BUILTIN_ALG_RSA_PSS */
 363
 364     return (PSA_SUCCESS);
 365 }
 366
 367 static psa_status_t rsa_sign_hash(
 368     const psa_key_attributes_t *attributes,
 369     const uint8_t *key_buffer, size_t key_buffer_size,
 370     psa_algorithm_t alg, const uint8_t *hash, size_t hash_length,
 371     uint8_t *signature, size_t signature_size, size_t *signature_length) {
 372     psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
 373     mbedtls_rsa_context *rsa = NULL;
 374     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 375     mbedtls_md_type_t md_alg;
 376
 377     status = mbedtls_psa_rsa_load_representation(attributes->core.type,
 378                                                  key_buffer,
 379                                                  key_buffer_size,
 380                                                  &rsa);
 381     if (status != PSA_SUCCESS)
 382         return (status);
 383
 384     status = psa_rsa_decode_md_type(alg, hash_length, &md_alg);
 385     if (status != PSA_SUCCESS)
 386         goto exit;
 387
 388     if (signature_size < mbedtls_rsa_get_len(rsa)) {
 389         status = PSA_ERROR_BUFFER_TOO_SMALL;
 390         goto exit;
 391     }
 392
 393 #if defined(BUILTIN_ALG_RSA_PKCS1V15_SIGN)
 394     if (PSA_ALG_IS_RSA_PKCS1V15_SIGN(alg)) {
 395         mbedtls_rsa_set_padding(rsa, MBEDTLS_RSA_PKCS_V15,
 396                                 MBEDTLS_MD_NONE);
 397         ret = mbedtls_rsa_pkcs1_sign(rsa,
 398                                      mbedtls_psa_get_random,
 399                                      MBEDTLS_PSA_RANDOM_STATE,
 400                                      MBEDTLS_RSA_PRIVATE,
 401                                      md_alg,
 402                                      (unsigned int) hash_length,
 403                                      hash,
 404                                      signature);
 405     } else
 406 #endif /* BUILTIN_ALG_RSA_PKCS1V15_SIGN */
 407 #if defined(BUILTIN_ALG_RSA_PSS)
 408         if (PSA_ALG_IS_RSA_PSS(alg)) {
 409             mbedtls_rsa_set_padding(rsa, MBEDTLS_RSA_PKCS_V21, md_alg);
 410             ret = mbedtls_rsa_rsassa_pss_sign(rsa,
 411                                               mbedtls_psa_get_random,
 412                                               MBEDTLS_PSA_RANDOM_STATE,
 413                                               MBEDTLS_RSA_PRIVATE,
 414                                               MBEDTLS_MD_NONE,
 415                                               (unsigned int) hash_length,
 416                                               hash,
 417                                               signature);
 418         } else
 419 #endif /* BUILTIN_ALG_RSA_PSS */
 420         {
 421             status = PSA_ERROR_INVALID_ARGUMENT;
 422             goto exit;
 423         }
 424
 425     if (ret == 0)
 426         *signature_length = mbedtls_rsa_get_len(rsa);
 427     status = mbedtls_to_psa_error(ret);
 428
 429 exit:
 430     mbedtls_rsa_free(rsa);
 431     mbedtls_free(rsa);
 432
 433     return (status);
 434 }
 435
 436 static psa_status_t rsa_verify_hash(
 437     const psa_key_attributes_t *attributes,
 438     const uint8_t *key_buffer, size_t key_buffer_size,
 439     psa_algorithm_t alg, const uint8_t *hash, size_t hash_length,
 440     const uint8_t *signature, size_t signature_length) {
 441     psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
 442     mbedtls_rsa_context *rsa = NULL;
 443     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 444     mbedtls_md_type_t md_alg;
 445
 446     status = mbedtls_psa_rsa_load_representation(attributes->core.type,
 447                                                  key_buffer,
 448                                                  key_buffer_size,
 449                                                  &rsa);
 450     if (status != PSA_SUCCESS)
 451         goto exit;
 452
 453     status = psa_rsa_decode_md_type(alg, hash_length, &md_alg);
 454     if (status != PSA_SUCCESS)
 455         goto exit;
 456
 457     if (signature_length != mbedtls_rsa_get_len(rsa)) {
 458         status = PSA_ERROR_INVALID_SIGNATURE;
 459         goto exit;
 460     }
 461
 462 #if defined(BUILTIN_ALG_RSA_PKCS1V15_SIGN)
 463     if (PSA_ALG_IS_RSA_PKCS1V15_SIGN(alg)) {
 464         mbedtls_rsa_set_padding(rsa, MBEDTLS_RSA_PKCS_V15,
 465                                 MBEDTLS_MD_NONE);
 466         ret = mbedtls_rsa_pkcs1_verify(rsa,
 467                                        mbedtls_psa_get_random,
 468                                        MBEDTLS_PSA_RANDOM_STATE,
 469                                        MBEDTLS_RSA_PUBLIC,
 470                                        md_alg,
 471                                        (unsigned int) hash_length,
 472                                        hash,
 473                                        signature);
 474     } else
 475 #endif /* BUILTIN_ALG_RSA_PKCS1V15_SIGN */
 476 #if defined(BUILTIN_ALG_RSA_PSS)
 477         if (PSA_ALG_IS_RSA_PSS(alg)) {
 478             mbedtls_rsa_set_padding(rsa, MBEDTLS_RSA_PKCS_V21, md_alg);
 479             ret = mbedtls_rsa_rsassa_pss_verify(rsa,
 480                                                 mbedtls_psa_get_random,
 481                                                 MBEDTLS_PSA_RANDOM_STATE,
 482                                                 MBEDTLS_RSA_PUBLIC,
 483                                                 MBEDTLS_MD_NONE,
 484                                                 (unsigned int) hash_length,
 485                                                 hash,
 486                                                 signature);
 487         } else
 488 #endif /* BUILTIN_ALG_RSA_PSS */
 489         {
 490             status = PSA_ERROR_INVALID_ARGUMENT;
 491             goto exit;
 492         }
 493
 494     /* Mbed TLS distinguishes "invalid padding" from "valid padding but
 495      * the rest of the signature is invalid". This has little use in
 496      * practice and PSA doesn't report this distinction. */
 497     status = (ret == MBEDTLS_ERR_RSA_INVALID_PADDING) ?
 498              PSA_ERROR_INVALID_SIGNATURE :
 499              mbedtls_to_psa_error(ret);
 500
 501 exit:
 502     mbedtls_rsa_free(rsa);
 503     mbedtls_free(rsa);
 504
 505     return (status);
 506 }
 507
 508 #endif /* defined(BUILTIN_ALG_RSA_PKCS1V15_SIGN) ||
 509         * defined(BUILTIN_ALG_RSA_PSS) */
 510
 511 #if defined(MBEDTLS_PSA_BUILTIN_KEY_TYPE_RSA_KEY_PAIR) || \
 512     defined(MBEDTLS_PSA_BUILTIN_KEY_TYPE_RSA_PUBLIC_KEY)
 513
 514 psa_status_t mbedtls_psa_rsa_import_key(
 515     const psa_key_attributes_t *attributes,
 516     const uint8_t *data, size_t data_length,
 517     uint8_t *key_buffer, size_t key_buffer_size,
 518     size_t *key_buffer_length, size_t *bits) {
 519     return (rsa_import_key(attributes, data, data_length,
 520                            key_buffer, key_buffer_size,
 521                            key_buffer_length, bits));
 522 }
 523
 524 psa_status_t mbedtls_psa_rsa_export_public_key(
 525     const psa_key_attributes_t *attributes,
 526     const uint8_t *key_buffer, size_t key_buffer_size,
 527     uint8_t *data, size_t data_size, size_t *data_length) {
 528     return (rsa_export_public_key(attributes, key_buffer, key_buffer_size,
 529                                   data, data_size, data_length));
 530 }
 531
 532 #endif /* defined(MBEDTLS_PSA_BUILTIN_KEY_TYPE_RSA_KEY_PAIR) ||
 533         * defined(MBEDTLS_PSA_BUILTIN_KEY_TYPE_RSA_PUBLIC_KEY) */
 534
 535 #if defined(MBEDTLS_PSA_BUILTIN_KEY_TYPE_RSA_KEY_PAIR)
 536 psa_status_t mbedtls_psa_rsa_generate_key(
 537     const psa_key_attributes_t *attributes,
 538     uint8_t *key_buffer, size_t key_buffer_size, size_t *key_buffer_length) {
 539     return (rsa_generate_key(attributes, key_buffer, key_buffer_size,
 540                              key_buffer_length));
 541 }
 542 #endif /* defined(MBEDTLS_PSA_BUILTIN_KEY_TYPE_RSA_KEY_PAIR) */
 543
 544 #if defined(MBEDTLS_PSA_BUILTIN_ALG_RSA_PKCS1V15_SIGN) || \
 545     defined(MBEDTLS_PSA_BUILTIN_ALG_RSA_PSS)
 546 psa_status_t mbedtls_psa_rsa_sign_hash(
 547     const psa_key_attributes_t *attributes,
 548     const uint8_t *key_buffer, size_t key_buffer_size,
 549     psa_algorithm_t alg, const uint8_t *hash, size_t hash_length,
 550     uint8_t *signature, size_t signature_size, size_t *signature_length) {
 551     return (rsa_sign_hash(
 552                 attributes,
 553                 key_buffer, key_buffer_size,
 554                 alg, hash, hash_length,
 555                 signature, signature_size, signature_length));
 556 }
 557
 558 psa_status_t mbedtls_psa_rsa_verify_hash(
 559     const psa_key_attributes_t *attributes,
 560     const uint8_t *key_buffer, size_t key_buffer_size,
 561     psa_algorithm_t alg, const uint8_t *hash, size_t hash_length,
 562     const uint8_t *signature, size_t signature_length) {
 563     return (rsa_verify_hash(
 564                 attributes,
 565                 key_buffer, key_buffer_size,
 566                 alg, hash, hash_length,
 567                 signature, signature_length));
 568 }
 569 #endif /* defined(MBEDTLS_PSA_BUILTIN_ALG_RSA_PKCS1V15_SIGN) ||
 570         * defined(MBEDTLS_PSA_BUILTIN_ALG_RSA_PSS) */
 571
 572 /*
 573  * BEYOND THIS POINT, TEST DRIVER ENTRY POINTS ONLY.
 574  */
 575
 576 #if defined(PSA_CRYPTO_DRIVER_TEST)
 577
 578 #if defined(MBEDTLS_PSA_ACCEL_KEY_TYPE_RSA_KEY_PAIR) || \
 579     defined(MBEDTLS_PSA_ACCEL_KEY_TYPE_RSA_PUBLIC_KEY)
 580
 581 psa_status_t mbedtls_transparent_test_driver_rsa_import_key(
 582     const psa_key_attributes_t *attributes,
 583     const uint8_t *data, size_t data_length,
 584     uint8_t *key_buffer, size_t key_buffer_size,
 585     size_t *key_buffer_length, size_t *bits) {
 586     return (rsa_import_key(attributes, data, data_length,
 587                            key_buffer, key_buffer_size,
 588                            key_buffer_length, bits));
 589 }
 590
 591 psa_status_t mbedtls_transparent_test_driver_rsa_export_public_key(
 592     const psa_key_attributes_t *attributes,
 593     const uint8_t *key_buffer, size_t key_buffer_size,
 594     uint8_t *data, size_t data_size, size_t *data_length) {
 595     return (rsa_export_public_key(attributes, key_buffer, key_buffer_size,
 596                                   data, data_size, data_length));
 597 }
 598
 599 #endif /* defined(MBEDTLS_PSA_ACCEL_KEY_TYPE_RSA_KEY_PAIR) ||
 600           defined(MBEDTLS_PSA_ACCEL_KEY_TYPE_RSA_PUBLIC_KEY) */
 601
 602 #if defined(MBEDTLS_PSA_ACCEL_KEY_TYPE_RSA_KEY_PAIR)
 603 psa_status_t mbedtls_transparent_test_driver_rsa_generate_key(
 604     const psa_key_attributes_t *attributes,
 605     uint8_t *key_buffer, size_t key_buffer_size, size_t *key_buffer_length) {
 606     return (rsa_generate_key(attributes, key_buffer, key_buffer_size,
 607                              key_buffer_length));
 608 }
 609 #endif /* defined(MBEDTLS_PSA_ACCEL_KEY_TYPE_RSA_KEY_PAIR) */
 610
 611 #if defined(MBEDTLS_PSA_ACCEL_ALG_RSA_PKCS1V15_SIGN) || \
 612     defined(MBEDTLS_PSA_ACCEL_ALG_RSA_PSS)
 613 psa_status_t mbedtls_transparent_test_driver_rsa_sign_hash(
 614     const psa_key_attributes_t *attributes,
 615     const uint8_t *key_buffer, size_t key_buffer_size,
 616     psa_algorithm_t alg, const uint8_t *hash, size_t hash_length,
 617     uint8_t *signature, size_t signature_size, size_t *signature_length) {
 618 #if defined(MBEDTLS_RSA_C) && \
 619     (defined(MBEDTLS_PKCS1_V15) || defined(MBEDTLS_PKCS1_V21))
 620     return (rsa_sign_hash(
 621                 attributes,
 622                 key_buffer, key_buffer_size,
 623                 alg, hash, hash_length,
 624                 signature, signature_size, signature_length));
 625 #else
 626     (void)attributes;
 627     (void)key_buffer;
 628     (void)key_buffer_size;
 629     (void)alg;
 630     (void)hash;
 631     (void)hash_length;
 632     (void)signature;
 633     (void)signature_size;
 634     (void)signature_length;
 635     return (PSA_ERROR_NOT_SUPPORTED);
 636 #endif
 637 }
 638
 639 psa_status_t mbedtls_transparent_test_driver_rsa_verify_hash(
 640     const psa_key_attributes_t *attributes,
 641     const uint8_t *key_buffer, size_t key_buffer_size,
 642     psa_algorithm_t alg, const uint8_t *hash, size_t hash_length,
 643     const uint8_t *signature, size_t signature_length) {
 644 #if defined(MBEDTLS_RSA_C) && \
 645     (defined(MBEDTLS_PKCS1_V15) || defined(MBEDTLS_PKCS1_V21))
 646     return (rsa_verify_hash(
 647                 attributes,
 648                 key_buffer, key_buffer_size,
 649                 alg, hash, hash_length,
 650                 signature, signature_length));
 651 #else
 652     (void)attributes;
 653     (void)key_buffer;
 654     (void)key_buffer_size;
 655     (void)alg;
 656     (void)hash;
 657     (void)hash_length;
 658     (void)signature;
 659     (void)signature_length;
 660     return (PSA_ERROR_NOT_SUPPORTED);
 661 #endif
 662 }
 663 #endif /* defined(MBEDTLS_PSA_ACCEL_ALG_RSA_PKCS1V15_SIGN) ||
 664         * defined(MBEDTLS_PSA_ACCEL_ALG_RSA_PSS) */
 665
 666 #endif /* PSA_CRYPTO_DRIVER_TEST */
 667
 668 #endif /* MBEDTLS_PSA_CRYPTO_C */