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