providers/implementations/asymciphers/rsa_enc.c

   1 /*
   2  * Copyright 2019-2021 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 #include <openssl/proverr.h>
  24 /* Just for SSL_MAX_MASTER_KEY_LENGTH */
  25 #include <openssl/ssl.h>
  26 #include "internal/constant_time.h"
  27 #include "internal/sizes.h"
  28 #include "crypto/rsa.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_NO_PADDING,           OSSL_PKEY_RSA_PAD_MODE_NONE },
  51     { RSA_PKCS1_OAEP_PADDING,   OSSL_PKEY_RSA_PAD_MODE_OAEP }, /* Correct spelling first */
  52     { RSA_PKCS1_OAEP_PADDING,   "oeap"   },
  53     { RSA_X931_PADDING,         OSSL_PKEY_RSA_PAD_MODE_X931 },
  54     { 0,                        NULL     }
  55 };
  56
  57 /*
  58  * What's passed as an actual key is defined by the KEYMGMT interface.
  59  * We happen to know that our KEYMGMT simply passes RSA structures, so
  60  * we use that here too.
  61  */
  62
  63 typedef struct {
  64     OSSL_LIB_CTX *libctx;
  65     RSA *rsa;
  66     int pad_mode;
  67     int operation;
  68     /* OAEP message digest */
  69     EVP_MD *oaep_md;
  70     /* message digest for MGF1 */
  71     EVP_MD *mgf1_md;
  72     /* OAEP label */
  73     unsigned char *oaep_label;
  74     size_t oaep_labellen;
  75     /* TLS padding */
  76     unsigned int client_version;
  77     unsigned int alt_version;
  78 } PROV_RSA_CTX;
  79
  80 static void *rsa_newctx(void *provctx)
  81 {
  82     PROV_RSA_CTX *prsactx;
  83
  84     if (!ossl_prov_is_running())
  85         return NULL;
  86     prsactx = OPENSSL_zalloc(sizeof(PROV_RSA_CTX));
  87     if (prsactx == NULL)
  88         return NULL;
  89     prsactx->libctx = PROV_LIBCTX_OF(provctx);
  90
  91     return prsactx;
  92 }
  93
  94 static int rsa_init(void *vprsactx, void *vrsa, const OSSL_PARAM params[],
  95                     int operation)
  96 {
  97     PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
  98
  99     if (!ossl_prov_is_running() || prsactx == NULL || vrsa == NULL)
 100         return 0;
 101
 102     if (!ossl_rsa_check_key(prsactx->libctx, vrsa, operation))
 103         return 0;
 104
 105     if (!RSA_up_ref(vrsa))
 106         return 0;
 107     RSA_free(prsactx->rsa);
 108     prsactx->rsa = vrsa;
 109     prsactx->operation = operation;
 110
 111     switch (RSA_test_flags(prsactx->rsa, RSA_FLAG_TYPE_MASK)) {
 112     case RSA_FLAG_TYPE_RSA:
 113         prsactx->pad_mode = RSA_PKCS1_PADDING;
 114         break;
 115     default:
 116         /* This should not happen due to the check above */
 117         ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
 118         return 0;
 119     }
 120     return rsa_set_ctx_params(prsactx, params);
 121 }
 122
 123 static int rsa_encrypt_init(void *vprsactx, void *vrsa,
 124                             const OSSL_PARAM params[])
 125 {
 126     return rsa_init(vprsactx, vrsa, params, EVP_PKEY_OP_ENCRYPT);
 127 }
 128
 129 static int rsa_decrypt_init(void *vprsactx, void *vrsa,
 130                             const OSSL_PARAM params[])
 131 {
 132     return rsa_init(vprsactx, vrsa, params, EVP_PKEY_OP_DECRYPT);
 133 }
 134
 135 static int rsa_encrypt(void *vprsactx, unsigned char *out, size_t *outlen,
 136                        size_t outsize, const unsigned char *in, size_t inlen)
 137 {
 138     PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
 139     int ret;
 140
 141     if (!ossl_prov_is_running())
 142         return 0;
 143
 144     if (out == NULL) {
 145         size_t len = RSA_size(prsactx->rsa);
 146
 147         if (len == 0) {
 148             ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY);
 149             return 0;
 150         }
 151         *outlen = len;
 152         return 1;
 153     }
 154
 155     if (prsactx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
 156         int rsasize = RSA_size(prsactx->rsa);
 157         unsigned char *tbuf;
 158
 159         if ((tbuf = OPENSSL_malloc(rsasize)) == NULL) {
 160             ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
 161             return 0;
 162         }
 163         if (prsactx->oaep_md == NULL) {
 164             OPENSSL_free(tbuf);
 165             prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, "SHA-1", NULL);
 166             ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
 167             return 0;
 168         }
 169         ret =
 170             ossl_rsa_padding_add_PKCS1_OAEP_mgf1_ex(prsactx->libctx, tbuf,
 171                                                     rsasize, in, inlen,
 172                                                     prsactx->oaep_label,
 173                                                     prsactx->oaep_labellen,
 174                                                     prsactx->oaep_md,
 175                                                     prsactx->mgf1_md);
 176
 177         if (!ret) {
 178             OPENSSL_free(tbuf);
 179             return 0;
 180         }
 181         ret = RSA_public_encrypt(rsasize, tbuf, out, prsactx->rsa,
 182                                  RSA_NO_PADDING);
 183         OPENSSL_free(tbuf);
 184     } else {
 185         ret = RSA_public_encrypt(inlen, in, out, prsactx->rsa,
 186                                  prsactx->pad_mode);
 187     }
 188     /* A ret value of 0 is not an error */
 189     if (ret < 0)
 190         return ret;
 191     *outlen = ret;
 192     return 1;
 193 }
 194
 195 static int rsa_decrypt(void *vprsactx, unsigned char *out, size_t *outlen,
 196                        size_t outsize, const unsigned char *in, size_t inlen)
 197 {
 198     PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
 199     int ret;
 200     size_t len = RSA_size(prsactx->rsa);
 201
 202     if (!ossl_prov_is_running())
 203         return 0;
 204
 205     if (prsactx->pad_mode == RSA_PKCS1_WITH_TLS_PADDING) {
 206         if (out == NULL) {
 207             *outlen = SSL_MAX_MASTER_KEY_LENGTH;
 208             return 1;
 209         }
 210         if (outsize < SSL_MAX_MASTER_KEY_LENGTH) {
 211             ERR_raise(ERR_LIB_PROV, PROV_R_BAD_LENGTH);
 212             return 0;
 213         }
 214     } else {
 215         if (out == NULL) {
 216             if (len == 0) {
 217                 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY);
 218                 return 0;
 219             }
 220             *outlen = len;
 221             return 1;
 222         }
 223
 224         if (outsize < len) {
 225             ERR_raise(ERR_LIB_PROV, PROV_R_BAD_LENGTH);
 226             return 0;
 227         }
 228     }
 229
 230     if (prsactx->pad_mode == RSA_PKCS1_OAEP_PADDING
 231             || prsactx->pad_mode == RSA_PKCS1_WITH_TLS_PADDING) {
 232         unsigned char *tbuf;
 233
 234         if ((tbuf = OPENSSL_malloc(len)) == NULL) {
 235             ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
 236             return 0;
 237         }
 238         ret = RSA_private_decrypt(inlen, in, tbuf, prsactx->rsa,
 239                                   RSA_NO_PADDING);
 240         /*
 241          * With no padding then, on success ret should be len, otherwise an
 242          * error occurred (non-constant time)
 243          */
 244         if (ret != (int)len) {
 245             OPENSSL_free(tbuf);
 246             ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_DECRYPT);
 247             return 0;
 248         }
 249         if (prsactx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
 250             if (prsactx->oaep_md == NULL) {
 251                 prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, "SHA-1", NULL);
 252                 if (prsactx->oaep_md == NULL) {
 253                     OPENSSL_free(tbuf);
 254                     ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
 255                     return 0;
 256                 }
 257             }
 258             ret = RSA_padding_check_PKCS1_OAEP_mgf1(out, outsize, tbuf,
 259                                                     len, len,
 260                                                     prsactx->oaep_label,
 261                                                     prsactx->oaep_labellen,
 262                                                     prsactx->oaep_md,
 263                                                     prsactx->mgf1_md);
 264         } else {
 265             /* RSA_PKCS1_WITH_TLS_PADDING */
 266             if (prsactx->client_version <= 0) {
 267                 ERR_raise(ERR_LIB_PROV, PROV_R_BAD_TLS_CLIENT_VERSION);
 268                 OPENSSL_free(tbuf);
 269                 return 0;
 270             }
 271             ret = ossl_rsa_padding_check_PKCS1_type_2_TLS(
 272                         prsactx->libctx, out, outsize, tbuf, len,
 273                         prsactx->client_version, prsactx->alt_version);
 274         }
 275         OPENSSL_free(tbuf);
 276     } else {
 277         ret = RSA_private_decrypt(inlen, in, out, prsactx->rsa,
 278                                   prsactx->pad_mode);
 279     }
 280     *outlen = constant_time_select_s(constant_time_msb_s(ret), *outlen, ret);
 281     ret = constant_time_select_int(constant_time_msb(ret), 0, 1);
 282     return ret;
 283 }
 284
 285 static void rsa_freectx(void *vprsactx)
 286 {
 287     PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
 288
 289     RSA_free(prsactx->rsa);
 290
 291     EVP_MD_free(prsactx->oaep_md);
 292     EVP_MD_free(prsactx->mgf1_md);
 293     OPENSSL_free(prsactx->oaep_label);
 294
 295     OPENSSL_free(prsactx);
 296 }
 297
 298 static void *rsa_dupctx(void *vprsactx)
 299 {
 300     PROV_RSA_CTX *srcctx = (PROV_RSA_CTX *)vprsactx;
 301     PROV_RSA_CTX *dstctx;
 302
 303     if (!ossl_prov_is_running())
 304         return NULL;
 305
 306     dstctx = OPENSSL_zalloc(sizeof(*srcctx));
 307     if (dstctx == NULL)
 308         return NULL;
 309
 310     *dstctx = *srcctx;
 311     if (dstctx->rsa != NULL && !RSA_up_ref(dstctx->rsa)) {
 312         OPENSSL_free(dstctx);
 313         return NULL;
 314     }
 315
 316     if (dstctx->oaep_md != NULL && !EVP_MD_up_ref(dstctx->oaep_md)) {
 317         RSA_free(dstctx->rsa);
 318         OPENSSL_free(dstctx);
 319         return NULL;
 320     }
 321
 322     if (dstctx->mgf1_md != NULL && !EVP_MD_up_ref(dstctx->mgf1_md)) {
 323         RSA_free(dstctx->rsa);
 324         EVP_MD_free(dstctx->oaep_md);
 325         OPENSSL_free(dstctx);
 326         return NULL;
 327     }
 328
 329     return dstctx;
 330 }
 331
 332 static int rsa_get_ctx_params(void *vprsactx, OSSL_PARAM *params)
 333 {
 334     PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
 335     OSSL_PARAM *p;
 336
 337     if (prsactx == NULL)
 338         return 0;
 339
 340     p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_PAD_MODE);
 341     if (p != NULL)
 342         switch (p->data_type) {
 343         case OSSL_PARAM_INTEGER: /* Support for legacy pad mode number */
 344             if (!OSSL_PARAM_set_int(p, prsactx->pad_mode))
 345                 return 0;
 346             break;
 347         case OSSL_PARAM_UTF8_STRING:
 348             {
 349                 int i;
 350                 const char *word = NULL;
 351
 352                 for (i = 0; padding_item[i].id != 0; i++) {
 353                     if (prsactx->pad_mode == (int)padding_item[i].id) {
 354                         word = padding_item[i].ptr;
 355                         break;
 356                     }
 357                 }
 358
 359                 if (word != NULL) {
 360                     if (!OSSL_PARAM_set_utf8_string(p, word))
 361                         return 0;
 362                 } else {
 363                     ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
 364                 }
 365             }
 366             break;
 367         default:
 368             return 0;
 369         }
 370
 371     p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST);
 372     if (p != NULL && !OSSL_PARAM_set_utf8_string(p, prsactx->oaep_md == NULL
 373                                                     ? ""
 374                                                     : EVP_MD_get0_name(prsactx->oaep_md)))
 375         return 0;
 376
 377     p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST);
 378     if (p != NULL) {
 379         EVP_MD *mgf1_md = prsactx->mgf1_md == NULL ? prsactx->oaep_md
 380                                                    : prsactx->mgf1_md;
 381
 382         if (!OSSL_PARAM_set_utf8_string(p, mgf1_md == NULL
 383                                            ? ""
 384                                            : EVP_MD_get0_name(mgf1_md)))
 385         return 0;
 386     }
 387
 388     p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL);
 389     if (p != NULL &&
 390         !OSSL_PARAM_set_octet_ptr(p, prsactx->oaep_label,
 391                                   prsactx->oaep_labellen))
 392         return 0;
 393
 394     p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION);
 395     if (p != NULL && !OSSL_PARAM_set_uint(p, prsactx->client_version))
 396         return 0;
 397
 398     p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION);
 399     if (p != NULL && !OSSL_PARAM_set_uint(p, prsactx->alt_version))
 400         return 0;
 401
 402     return 1;
 403 }
 404
 405 static const OSSL_PARAM known_gettable_ctx_params[] = {
 406     OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST, NULL, 0),
 407     OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_PAD_MODE, NULL, 0),
 408     OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST, NULL, 0),
 409     OSSL_PARAM_DEFN(OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL, OSSL_PARAM_OCTET_PTR,
 410                     NULL, 0),
 411     OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION, NULL),
 412     OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION, NULL),
 413     OSSL_PARAM_END
 414 };
 415
 416 static const OSSL_PARAM *rsa_gettable_ctx_params(ossl_unused void *vprsactx,
 417                                                  ossl_unused void *provctx)
 418 {
 419     return known_gettable_ctx_params;
 420 }
 421
 422 static int rsa_set_ctx_params(void *vprsactx, const OSSL_PARAM params[])
 423 {
 424     PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
 425     const OSSL_PARAM *p;
 426     char mdname[OSSL_MAX_NAME_SIZE];
 427     char mdprops[OSSL_MAX_PROPQUERY_SIZE] = { '\0' };
 428     char *str = mdname;
 429
 430     if (prsactx == NULL)
 431         return 0;
 432     if (params == NULL)
 433         return 1;
 434
 435     p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST);
 436     if (p != NULL) {
 437         if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdname)))
 438             return 0;
 439
 440         str = mdprops;
 441         p = OSSL_PARAM_locate_const(params,
 442                                     OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST_PROPS);
 443         if (p != NULL) {
 444             if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdprops)))
 445                 return 0;
 446         }
 447
 448         EVP_MD_free(prsactx->oaep_md);
 449         prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, mdname, mdprops);
 450
 451         if (prsactx->oaep_md == NULL)
 452             return 0;
 453     }
 454
 455     p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_PAD_MODE);
 456     if (p != NULL) {
 457         int pad_mode = 0;
 458
 459         switch (p->data_type) {
 460         case OSSL_PARAM_INTEGER: /* Support for legacy pad mode number */
 461             if (!OSSL_PARAM_get_int(p, &pad_mode))
 462                 return 0;
 463             break;
 464         case OSSL_PARAM_UTF8_STRING:
 465             {
 466                 int i;
 467
 468                 if (p->data == NULL)
 469                     return 0;
 470
 471                 for (i = 0; padding_item[i].id != 0; i++) {
 472                     if (strcmp(p->data, padding_item[i].ptr) == 0) {
 473                         pad_mode = padding_item[i].id;
 474                         break;
 475                     }
 476                 }
 477             }
 478             break;
 479         default:
 480             return 0;
 481         }
 482
 483         /*
 484          * PSS padding is for signatures only so is not compatible with
 485          * asymmetric cipher use.
 486          */
 487         if (pad_mode == RSA_PKCS1_PSS_PADDING)
 488             return 0;
 489         if (pad_mode == RSA_PKCS1_OAEP_PADDING && prsactx->oaep_md == NULL) {
 490             prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, "SHA1", mdprops);
 491             if (prsactx->oaep_md == NULL)
 492                 return 0;
 493         }
 494         prsactx->pad_mode = pad_mode;
 495     }
 496
 497     p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST);
 498     if (p != NULL) {
 499         if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdname)))
 500             return 0;
 501
 502         str = mdprops;
 503         p = OSSL_PARAM_locate_const(params,
 504                                     OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST_PROPS);
 505         if (p != NULL) {
 506             if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdprops)))
 507                 return 0;
 508         } else {
 509             str = NULL;
 510         }
 511
 512         EVP_MD_free(prsactx->mgf1_md);
 513         prsactx->mgf1_md = EVP_MD_fetch(prsactx->libctx, mdname, str);
 514
 515         if (prsactx->mgf1_md == NULL)
 516             return 0;
 517     }
 518
 519     p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL);
 520     if (p != NULL) {
 521         void *tmp_label = NULL;
 522         size_t tmp_labellen;
 523
 524         if (!OSSL_PARAM_get_octet_string(p, &tmp_label, 0, &tmp_labellen))
 525             return 0;
 526         OPENSSL_free(prsactx->oaep_label);
 527         prsactx->oaep_label = (unsigned char *)tmp_label;
 528         prsactx->oaep_labellen = tmp_labellen;
 529     }
 530
 531     p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION);
 532     if (p != NULL) {
 533         unsigned int client_version;
 534
 535         if (!OSSL_PARAM_get_uint(p, &client_version))
 536             return 0;
 537         prsactx->client_version = client_version;
 538     }
 539
 540     p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION);
 541     if (p != NULL) {
 542         unsigned int alt_version;
 543
 544         if (!OSSL_PARAM_get_uint(p, &alt_version))
 545             return 0;
 546         prsactx->alt_version = alt_version;
 547     }
 548
 549     return 1;
 550 }
 551
 552 static const OSSL_PARAM known_settable_ctx_params[] = {
 553     OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST, NULL, 0),
 554     OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_PAD_MODE, NULL, 0),
 555     OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST, NULL, 0),
 556     OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST_PROPS, NULL, 0),
 557     OSSL_PARAM_octet_string(OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL, NULL, 0),
 558     OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION, NULL),
 559     OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION, NULL),
 560     OSSL_PARAM_END
 561 };
 562
 563 static const OSSL_PARAM *rsa_settable_ctx_params(ossl_unused void *vprsactx,
 564                                                  ossl_unused void *provctx)
 565 {
 566     return known_settable_ctx_params;
 567 }
 568
 569 const OSSL_DISPATCH ossl_rsa_asym_cipher_functions[] = {
 570     { OSSL_FUNC_ASYM_CIPHER_NEWCTX, (void (*)(void))rsa_newctx },
 571     { OSSL_FUNC_ASYM_CIPHER_ENCRYPT_INIT, (void (*)(void))rsa_encrypt_init },
 572     { OSSL_FUNC_ASYM_CIPHER_ENCRYPT, (void (*)(void))rsa_encrypt },
 573     { OSSL_FUNC_ASYM_CIPHER_DECRYPT_INIT, (void (*)(void))rsa_decrypt_init },
 574     { OSSL_FUNC_ASYM_CIPHER_DECRYPT, (void (*)(void))rsa_decrypt },
 575     { OSSL_FUNC_ASYM_CIPHER_FREECTX, (void (*)(void))rsa_freectx },
 576     { OSSL_FUNC_ASYM_CIPHER_DUPCTX, (void (*)(void))rsa_dupctx },
 577     { OSSL_FUNC_ASYM_CIPHER_GET_CTX_PARAMS,
 578       (void (*)(void))rsa_get_ctx_params },
 579     { OSSL_FUNC_ASYM_CIPHER_GETTABLE_CTX_PARAMS,
 580       (void (*)(void))rsa_gettable_ctx_params },
 581     { OSSL_FUNC_ASYM_CIPHER_SET_CTX_PARAMS,
 582       (void (*)(void))rsa_set_ctx_params },
 583     { OSSL_FUNC_ASYM_CIPHER_SETTABLE_CTX_PARAMS,
 584       (void (*)(void))rsa_settable_ctx_params },
 585     { 0, NULL }
 586 };