providers/implementations/asymciphers/rsa_enc.c

   1 /*
   2  * Copyright 2019-2020 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 /*
  11  * RSA low level APIs are deprecated for public use, but still ok for
  12  * internal use.
  13  */
  14 #include "internal/deprecated.h"
  15
  16 #include <openssl/crypto.h>
  17 #include <openssl/evp.h>
  18 #include <openssl/core_dispatch.h>
  19 #include <openssl/core_names.h>
  20 #include <openssl/rsa.h>
  21 #include <openssl/params.h>
  22 #include <openssl/err.h>
  23 /* Just for SSL_MAX_MASTER_KEY_LENGTH */
  24 #include <openssl/ssl.h>
  25 #include "internal/constant_time.h"
  26 #include "internal/sizes.h"
  27 #include "crypto/rsa.h"
  28 #include "prov/providercommonerr.h"
  29 #include "prov/provider_ctx.h"
  30 #include "prov/implementations.h"
  31 #include "prov/providercommon.h"
  32 #include "prov/securitycheck.h"
  33
  34 #include <stdlib.h>
  35
  36 static OSSL_FUNC_asym_cipher_newctx_fn rsa_newctx;
  37 static OSSL_FUNC_asym_cipher_encrypt_init_fn rsa_encrypt_init;
  38 static OSSL_FUNC_asym_cipher_encrypt_fn rsa_encrypt;
  39 static OSSL_FUNC_asym_cipher_decrypt_init_fn rsa_decrypt_init;
  40 static OSSL_FUNC_asym_cipher_decrypt_fn rsa_decrypt;
  41 static OSSL_FUNC_asym_cipher_freectx_fn rsa_freectx;
  42 static OSSL_FUNC_asym_cipher_dupctx_fn rsa_dupctx;
  43 static OSSL_FUNC_asym_cipher_get_ctx_params_fn rsa_get_ctx_params;
  44 static OSSL_FUNC_asym_cipher_gettable_ctx_params_fn rsa_gettable_ctx_params;
  45 static OSSL_FUNC_asym_cipher_set_ctx_params_fn rsa_set_ctx_params;
  46 static OSSL_FUNC_asym_cipher_settable_ctx_params_fn rsa_settable_ctx_params;
  47
  48 static OSSL_ITEM padding_item[] = {
  49     { RSA_PKCS1_PADDING,        OSSL_PKEY_RSA_PAD_MODE_PKCSV15 },
  50     { RSA_SSLV23_PADDING,       OSSL_PKEY_RSA_PAD_MODE_SSLV23 },
  51     { RSA_NO_PADDING,           OSSL_PKEY_RSA_PAD_MODE_NONE },
  52     { RSA_PKCS1_OAEP_PADDING,   OSSL_PKEY_RSA_PAD_MODE_OAEP }, /* Correct spelling first */
  53     { RSA_PKCS1_OAEP_PADDING,   "oeap"   },
  54     { RSA_X931_PADDING,         OSSL_PKEY_RSA_PAD_MODE_X931 },
  55     { 0,                        NULL     }
  56 };
  57
  58 /*
  59  * What's passed as an actual key is defined by the KEYMGMT interface.
  60  * We happen to know that our KEYMGMT simply passes RSA structures, so
  61  * we use that here too.
  62  */
  63
  64 typedef struct {
  65     OPENSSL_CTX *libctx;
  66     RSA *rsa;
  67     int pad_mode;
  68     int operation;
  69     /* OAEP message digest */
  70     EVP_MD *oaep_md;
  71     /* message digest for MGF1 */
  72     EVP_MD *mgf1_md;
  73     /* OAEP label */
  74     unsigned char *oaep_label;
  75     size_t oaep_labellen;
  76     /* TLS padding */
  77     unsigned int client_version;
  78     unsigned int alt_version;
  79 } PROV_RSA_CTX;
  80
  81 static void *rsa_newctx(void *provctx)
  82 {
  83     PROV_RSA_CTX *prsactx;
  84
  85     if (!ossl_prov_is_running())
  86         return NULL;
  87     prsactx = OPENSSL_zalloc(sizeof(PROV_RSA_CTX));
  88     if (prsactx == NULL)
  89         return NULL;
  90     prsactx->libctx = PROV_LIBRARY_CONTEXT_OF(provctx);
  91
  92     return prsactx;
  93 }
  94
  95 static int rsa_init(void *vprsactx, void *vrsa, int operation)
  96 {
  97     PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
  98
  99     if (!ossl_prov_is_running()
 100             || prsactx == NULL
 101             || vrsa == NULL
 102             || !RSA_up_ref(vrsa))
 103         return 0;
 104     RSA_free(prsactx->rsa);
 105     prsactx->rsa = vrsa;
 106     prsactx->operation = operation;
 107
 108     switch (RSA_test_flags(prsactx->rsa, RSA_FLAG_TYPE_MASK)) {
 109     case RSA_FLAG_TYPE_RSA:
 110         prsactx->pad_mode = RSA_PKCS1_PADDING;
 111         break;
 112     default:
 113         ERR_raise(ERR_LIB_PROV, PROV_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 114         return 0;
 115     }
 116     if (!ossl_rsa_check_key(vrsa, operation == EVP_PKEY_OP_ENCRYPT)) {
 117         ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH);
 118         return 0;
 119     }
 120     return 1;
 121 }
 122
 123 static int rsa_encrypt_init(void *vprsactx, void *vrsa)
 124 {
 125     return rsa_init(vprsactx, vrsa, EVP_PKEY_OP_ENCRYPT);
 126 }
 127
 128 static int rsa_decrypt_init(void *vprsactx, void *vrsa)
 129 {
 130     return rsa_init(vprsactx, vrsa, EVP_PKEY_OP_DECRYPT);
 131 }
 132
 133 static int rsa_encrypt(void *vprsactx, unsigned char *out, size_t *outlen,
 134                        size_t outsize, const unsigned char *in, size_t inlen)
 135 {
 136     PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
 137     int ret;
 138
 139     if (!ossl_prov_is_running())
 140         return 0;
 141
 142     if (out == NULL) {
 143         size_t len = RSA_size(prsactx->rsa);
 144
 145         if (len == 0) {
 146             ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY);
 147             return 0;
 148         }
 149         *outlen = len;
 150         return 1;
 151     }
 152
 153     if (prsactx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
 154         int rsasize = RSA_size(prsactx->rsa);
 155         unsigned char *tbuf;
 156
 157         if ((tbuf = OPENSSL_malloc(rsasize)) == NULL) {
 158             PROVerr(0, ERR_R_MALLOC_FAILURE);
 159             return 0;
 160         }
 161         if (prsactx->oaep_md == NULL) {
 162             OPENSSL_free(tbuf);
 163             prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, "SHA-1", NULL);
 164             PROVerr(0, ERR_R_INTERNAL_ERROR);
 165             return 0;
 166         }
 167         ret =
 168             ossl_rsa_padding_add_PKCS1_OAEP_mgf1_ex(prsactx->libctx, tbuf,
 169                                                     rsasize, in, inlen,
 170                                                     prsactx->oaep_label,
 171                                                     prsactx->oaep_labellen,
 172                                                     prsactx->oaep_md,
 173                                                     prsactx->mgf1_md);
 174
 175         if (!ret) {
 176             OPENSSL_free(tbuf);
 177             return 0;
 178         }
 179         ret = RSA_public_encrypt(rsasize, tbuf, out, prsactx->rsa,
 180                                  RSA_NO_PADDING);
 181         OPENSSL_free(tbuf);
 182     } else {
 183         ret = RSA_public_encrypt(inlen, in, out, prsactx->rsa,
 184                                  prsactx->pad_mode);
 185     }
 186     /* A ret value of 0 is not an error */
 187     if (ret < 0)
 188         return ret;
 189     *outlen = ret;
 190     return 1;
 191 }
 192
 193 static int rsa_decrypt(void *vprsactx, unsigned char *out, size_t *outlen,
 194                        size_t outsize, const unsigned char *in, size_t inlen)
 195 {
 196     PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
 197     int ret;
 198     size_t len = RSA_size(prsactx->rsa);
 199
 200     if (!ossl_prov_is_running())
 201         return 0;
 202
 203     if (prsactx->pad_mode == RSA_PKCS1_WITH_TLS_PADDING) {
 204         if (out == NULL) {
 205             *outlen = SSL_MAX_MASTER_KEY_LENGTH;
 206             return 1;
 207         }
 208         if (outsize < SSL_MAX_MASTER_KEY_LENGTH) {
 209             ERR_raise(ERR_LIB_PROV, PROV_R_BAD_LENGTH);
 210             return 0;
 211         }
 212     } else {
 213         if (out == NULL) {
 214             if (len == 0) {
 215                 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY);
 216                 return 0;
 217             }
 218             *outlen = len;
 219             return 1;
 220         }
 221
 222         if (outsize < len) {
 223             ERR_raise(ERR_LIB_PROV, PROV_R_BAD_LENGTH);
 224             return 0;
 225         }
 226     }
 227
 228     if (prsactx->pad_mode == RSA_PKCS1_OAEP_PADDING
 229             || prsactx->pad_mode == RSA_PKCS1_WITH_TLS_PADDING) {
 230         unsigned char *tbuf;
 231
 232         if ((tbuf = OPENSSL_malloc(len)) == NULL) {
 233             PROVerr(0, ERR_R_MALLOC_FAILURE);
 234             return 0;
 235         }
 236         ret = RSA_private_decrypt(inlen, in, tbuf, prsactx->rsa,
 237                                   RSA_NO_PADDING);
 238         /*
 239          * With no padding then, on success ret should be len, otherwise an
 240          * error occurred (non-constant time)
 241          */
 242         if (ret != (int)len) {
 243             OPENSSL_free(tbuf);
 244             ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_DECRYPT);
 245             return 0;
 246         }
 247         if (prsactx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
 248             if (prsactx->oaep_md == NULL) {
 249                 prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, "SHA-1", NULL);
 250                 if (prsactx->oaep_md == NULL) {
 251                     PROVerr(0, ERR_R_INTERNAL_ERROR);
 252                     return 0;
 253                 }
 254             }
 255             ret = RSA_padding_check_PKCS1_OAEP_mgf1(out, outsize, tbuf,
 256                                                     len, len,
 257                                                     prsactx->oaep_label,
 258                                                     prsactx->oaep_labellen,
 259                                                     prsactx->oaep_md,
 260                                                     prsactx->mgf1_md);
 261         } else {
 262             /* RSA_PKCS1_WITH_TLS_PADDING */
 263             if (prsactx->client_version <= 0) {
 264                 ERR_raise(ERR_LIB_PROV, PROV_R_BAD_TLS_CLIENT_VERSION);
 265                 return 0;
 266             }
 267             ret = ossl_rsa_padding_check_PKCS1_type_2_TLS(
 268                         prsactx->libctx, out, outsize, tbuf, len,
 269                         prsactx->client_version, prsactx->alt_version);
 270         }
 271         OPENSSL_free(tbuf);
 272     } else {
 273         ret = RSA_private_decrypt(inlen, in, out, prsactx->rsa,
 274                                   prsactx->pad_mode);
 275     }
 276     *outlen = constant_time_select_s(constant_time_msb_s(ret), *outlen, ret);
 277     ret = constant_time_select_int(constant_time_msb(ret), 0, 1);
 278     return ret;
 279 }
 280
 281 static void rsa_freectx(void *vprsactx)
 282 {
 283     PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
 284
 285     RSA_free(prsactx->rsa);
 286
 287     EVP_MD_free(prsactx->oaep_md);
 288     EVP_MD_free(prsactx->mgf1_md);
 289     OPENSSL_free(prsactx->oaep_label);
 290
 291     OPENSSL_free(prsactx);
 292 }
 293
 294 static void *rsa_dupctx(void *vprsactx)
 295 {
 296     PROV_RSA_CTX *srcctx = (PROV_RSA_CTX *)vprsactx;
 297     PROV_RSA_CTX *dstctx;
 298
 299     if (!ossl_prov_is_running())
 300         return NULL;
 301
 302     dstctx = OPENSSL_zalloc(sizeof(*srcctx));
 303     if (dstctx == NULL)
 304         return NULL;
 305
 306     *dstctx = *srcctx;
 307     if (dstctx->rsa != NULL && !RSA_up_ref(dstctx->rsa)) {
 308         OPENSSL_free(dstctx);
 309         return NULL;
 310     }
 311
 312     if (dstctx->oaep_md != NULL && !EVP_MD_up_ref(dstctx->oaep_md)) {
 313         RSA_free(dstctx->rsa);
 314         OPENSSL_free(dstctx);
 315         return NULL;
 316     }
 317
 318     if (dstctx->mgf1_md != NULL && !EVP_MD_up_ref(dstctx->mgf1_md)) {
 319         RSA_free(dstctx->rsa);
 320         EVP_MD_free(dstctx->oaep_md);
 321         OPENSSL_free(dstctx);
 322         return NULL;
 323     }
 324
 325     return dstctx;
 326 }
 327
 328 static int rsa_get_ctx_params(void *vprsactx, OSSL_PARAM *params)
 329 {
 330     PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
 331     OSSL_PARAM *p;
 332
 333     if (prsactx == NULL || params == NULL)
 334         return 0;
 335
 336     p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_PAD_MODE);
 337     if (p != NULL)
 338         switch (p->data_type) {
 339         case OSSL_PARAM_INTEGER: /* Support for legacy pad mode number */
 340             if (!OSSL_PARAM_set_int(p, prsactx->pad_mode))
 341                 return 0;
 342             break;
 343         case OSSL_PARAM_UTF8_STRING:
 344             {
 345                 int i;
 346                 const char *word = NULL;
 347
 348                 for (i = 0; padding_item[i].id != 0; i++) {
 349                     if (prsactx->pad_mode == (int)padding_item[i].id) {
 350                         word = padding_item[i].ptr;
 351                         break;
 352                     }
 353                 }
 354
 355                 if (word != NULL) {
 356                     if (!OSSL_PARAM_set_utf8_string(p, word))
 357                         return 0;
 358                 } else {
 359                     ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
 360                 }
 361             }
 362             break;
 363         default:
 364             return 0;
 365         }
 366
 367     p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST);
 368     if (p != NULL && !OSSL_PARAM_set_utf8_string(p, prsactx->oaep_md == NULL
 369                                                     ? ""
 370                                                     : EVP_MD_name(prsactx->oaep_md)))
 371         return 0;
 372
 373     p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST);
 374     if (p != NULL) {
 375         EVP_MD *mgf1_md = prsactx->mgf1_md == NULL ? prsactx->oaep_md
 376                                                    : prsactx->mgf1_md;
 377
 378         if (!OSSL_PARAM_set_utf8_string(p, mgf1_md == NULL
 379                                            ? ""
 380                                            : EVP_MD_name(mgf1_md)))
 381         return 0;
 382     }
 383
 384     p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL);
 385     if (p != NULL && !OSSL_PARAM_set_octet_ptr(p, prsactx->oaep_label, 0))
 386         return 0;
 387
 388     p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL_LEN);
 389     if (p != NULL && !OSSL_PARAM_set_size_t(p, prsactx->oaep_labellen))
 390         return 0;
 391
 392     p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION);
 393     if (p != NULL && !OSSL_PARAM_set_uint(p, prsactx->client_version))
 394         return 0;
 395
 396     p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION);
 397     if (p != NULL && !OSSL_PARAM_set_uint(p, prsactx->alt_version))
 398         return 0;
 399
 400     return 1;
 401 }
 402
 403 static const OSSL_PARAM known_gettable_ctx_params[] = {
 404     OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST, NULL, 0),
 405     OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_PAD_MODE, NULL, 0),
 406     OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST, NULL, 0),
 407     OSSL_PARAM_DEFN(OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL, OSSL_PARAM_OCTET_PTR,
 408                     NULL, 0),
 409     OSSL_PARAM_size_t(OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL_LEN, NULL),
 410     OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION, NULL),
 411     OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION, NULL),
 412     OSSL_PARAM_END
 413 };
 414
 415 static const OSSL_PARAM *rsa_gettable_ctx_params(ossl_unused void *provctx)
 416 {
 417     return known_gettable_ctx_params;
 418 }
 419
 420 static int rsa_set_ctx_params(void *vprsactx, const OSSL_PARAM params[])
 421 {
 422     PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
 423     const OSSL_PARAM *p;
 424     char mdname[OSSL_MAX_NAME_SIZE];
 425     char mdprops[OSSL_MAX_PROPQUERY_SIZE] = { '\0' };
 426     char *str = mdname;
 427
 428     if (prsactx == NULL || params == NULL)
 429         return 0;
 430
 431     p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST);
 432     if (p != NULL) {
 433         if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdname)))
 434             return 0;
 435
 436         str = mdprops;
 437         p = OSSL_PARAM_locate_const(params,
 438                                     OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST_PROPS);
 439         if (p != NULL) {
 440             if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdprops)))
 441                 return 0;
 442         }
 443
 444         EVP_MD_free(prsactx->oaep_md);
 445         prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, mdname, mdprops);
 446
 447         if (prsactx->oaep_md == NULL)
 448             return 0;
 449     }
 450
 451     p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_PAD_MODE);
 452     if (p != NULL) {
 453         int pad_mode = 0;
 454
 455         switch (p->data_type) {
 456         case OSSL_PARAM_INTEGER: /* Support for legacy pad mode number */
 457             if (!OSSL_PARAM_get_int(p, &pad_mode))
 458                 return 0;
 459             break;
 460         case OSSL_PARAM_UTF8_STRING:
 461             {
 462                 int i;
 463
 464                 if (p->data == NULL)
 465                     return 0;
 466
 467                 for (i = 0; padding_item[i].id != 0; i++) {
 468                     if (strcmp(p->data, padding_item[i].ptr) == 0) {
 469                         pad_mode = padding_item[i].id;
 470                         break;
 471                     }
 472                 }
 473             }
 474             break;
 475         default:
 476             return 0;
 477         }
 478
 479         /*
 480          * PSS padding is for signatures only so is not compatible with
 481          * asymmetric cipher use.
 482          */
 483         if (pad_mode == RSA_PKCS1_PSS_PADDING)
 484             return 0;
 485         if (pad_mode == RSA_PKCS1_OAEP_PADDING && prsactx->oaep_md == NULL) {
 486             prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, "SHA1", mdprops);
 487             if (prsactx->oaep_md == NULL)
 488                 return 0;
 489         }
 490         prsactx->pad_mode = pad_mode;
 491     }
 492
 493     p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST);
 494     if (p != NULL) {
 495         if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdname)))
 496             return 0;
 497
 498         str = mdprops;
 499         p = OSSL_PARAM_locate_const(params,
 500                                     OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST_PROPS);
 501         if (p != NULL) {
 502             if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdprops)))
 503                 return 0;
 504         } else {
 505             str = NULL;
 506         }
 507
 508         EVP_MD_free(prsactx->mgf1_md);
 509         prsactx->mgf1_md = EVP_MD_fetch(prsactx->libctx, mdname, str);
 510
 511         if (prsactx->mgf1_md == NULL)
 512             return 0;
 513     }
 514
 515     p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL);
 516     if (p != NULL) {
 517         void *tmp_label = NULL;
 518         size_t tmp_labellen;
 519
 520         if (!OSSL_PARAM_get_octet_string(p, &tmp_label, 0, &tmp_labellen))
 521             return 0;
 522         OPENSSL_free(prsactx->oaep_label);
 523         prsactx->oaep_label = (unsigned char *)tmp_label;
 524         prsactx->oaep_labellen = tmp_labellen;
 525     }
 526
 527     p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION);
 528     if (p != NULL) {
 529         unsigned int client_version;
 530
 531         if (!OSSL_PARAM_get_uint(p, &client_version))
 532             return 0;
 533         prsactx->client_version = client_version;
 534     }
 535
 536     p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION);
 537     if (p != NULL) {
 538         unsigned int alt_version;
 539
 540         if (!OSSL_PARAM_get_uint(p, &alt_version))
 541             return 0;
 542         prsactx->alt_version = alt_version;
 543     }
 544
 545     return 1;
 546 }
 547
 548 static const OSSL_PARAM known_settable_ctx_params[] = {
 549     OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST, NULL, 0),
 550     OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_PAD_MODE, NULL, 0),
 551     OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST, NULL, 0),
 552     OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST_PROPS, NULL, 0),
 553     OSSL_PARAM_octet_string(OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL, NULL, 0),
 554     OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION, NULL),
 555     OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION, NULL),
 556     OSSL_PARAM_END
 557 };
 558
 559 static const OSSL_PARAM *rsa_settable_ctx_params(ossl_unused void *provctx)
 560 {
 561     return known_settable_ctx_params;
 562 }
 563
 564 const OSSL_DISPATCH ossl_rsa_asym_cipher_functions[] = {
 565     { OSSL_FUNC_ASYM_CIPHER_NEWCTX, (void (*)(void))rsa_newctx },
 566     { OSSL_FUNC_ASYM_CIPHER_ENCRYPT_INIT, (void (*)(void))rsa_encrypt_init },
 567     { OSSL_FUNC_ASYM_CIPHER_ENCRYPT, (void (*)(void))rsa_encrypt },
 568     { OSSL_FUNC_ASYM_CIPHER_DECRYPT_INIT, (void (*)(void))rsa_decrypt_init },
 569     { OSSL_FUNC_ASYM_CIPHER_DECRYPT, (void (*)(void))rsa_decrypt },
 570     { OSSL_FUNC_ASYM_CIPHER_FREECTX, (void (*)(void))rsa_freectx },
 571     { OSSL_FUNC_ASYM_CIPHER_DUPCTX, (void (*)(void))rsa_dupctx },
 572     { OSSL_FUNC_ASYM_CIPHER_GET_CTX_PARAMS,
 573       (void (*)(void))rsa_get_ctx_params },
 574     { OSSL_FUNC_ASYM_CIPHER_GETTABLE_CTX_PARAMS,
 575       (void (*)(void))rsa_gettable_ctx_params },
 576     { OSSL_FUNC_ASYM_CIPHER_SET_CTX_PARAMS,
 577       (void (*)(void))rsa_set_ctx_params },
 578     { OSSL_FUNC_ASYM_CIPHER_SETTABLE_CTX_PARAMS,
 579       (void (*)(void))rsa_settable_ctx_params },
 580     { 0, NULL }
 581 };