text: /*
   * Copyright 2019-2022 The OpenSSL Project Authors. All Rights Reserved.
   *
   * Licensed under the Apache License 2.0 (the "License").  You may not use
   * this file except in compliance with the License.  You can obtain a copy
   * in the file LICENSE in the source distribution or at
   * https://www.openssl.org/source/license.html
   */
  
  /*
   * RSA low level APIs are deprecated for public use, but still ok for
   * internal use.
   */
  #include "internal/deprecated.h"
  
  #include <openssl/core_dispatch.h>
  #include <openssl/core_names.h>
  #include <openssl/bn.h>
  #include <openssl/err.h>
  #include <openssl/rsa.h>
  #include <openssl/evp.h>
  #include <openssl/proverr.h>
  #include "prov/implementations.h"
  #include "prov/providercommon.h"
  #include "prov/provider_ctx.h"
  #include "crypto/rsa.h"
  #include "crypto/cryptlib.h"
  #include "internal/param_build_set.h"
  
  static OSSL_FUNC_keymgmt_new_fn rsa_newdata;
  static OSSL_FUNC_keymgmt_new_fn rsapss_newdata;
  static OSSL_FUNC_keymgmt_gen_init_fn rsa_gen_init;
  static OSSL_FUNC_keymgmt_gen_init_fn rsapss_gen_init;
  static OSSL_FUNC_keymgmt_gen_set_params_fn rsa_gen_set_params;
  static OSSL_FUNC_keymgmt_gen_settable_params_fn rsa_gen_settable_params;
  static OSSL_FUNC_keymgmt_gen_settable_params_fn rsapss_gen_settable_params;
  static OSSL_FUNC_keymgmt_gen_fn rsa_gen;
  static OSSL_FUNC_keymgmt_gen_cleanup_fn rsa_gen_cleanup;
  static OSSL_FUNC_keymgmt_load_fn rsa_load;
  static OSSL_FUNC_keymgmt_load_fn rsapss_load;
  static OSSL_FUNC_keymgmt_free_fn rsa_freedata;
  static OSSL_FUNC_keymgmt_get_params_fn rsa_get_params;
  static OSSL_FUNC_keymgmt_gettable_params_fn rsa_gettable_params;
  static OSSL_FUNC_keymgmt_has_fn rsa_has;
  static OSSL_FUNC_keymgmt_match_fn rsa_match;
  static OSSL_FUNC_keymgmt_validate_fn rsa_validate;
  static OSSL_FUNC_keymgmt_import_fn rsa_import;
  static OSSL_FUNC_keymgmt_import_types_fn rsa_import_types;
  static OSSL_FUNC_keymgmt_export_fn rsa_export;
  static OSSL_FUNC_keymgmt_export_types_fn rsa_export_types;
  static OSSL_FUNC_keymgmt_query_operation_name_fn rsa_query_operation_name;
  static OSSL_FUNC_keymgmt_dup_fn rsa_dup;
  
  #define RSA_DEFAULT_MD "SHA256"
  #define RSA_PSS_DEFAULT_MD OSSL_DIGEST_NAME_SHA1
  #define RSA_POSSIBLE_SELECTIONS                                        \
      (OSSL_KEYMGMT_SELECT_KEYPAIR | OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS)
  
  DEFINE_STACK_OF(BIGNUM)
  DEFINE_SPECIAL_STACK_OF_CONST(BIGNUM_const, BIGNUM)
  
  static int pss_params_fromdata(RSA_PSS_PARAMS_30 *pss_params, int *defaults_set,
                                 const OSSL_PARAM params[], int rsa_type,
                                 OSSL_LIB_CTX *libctx)
  {
      if (!ossl_rsa_pss_params_30_fromdata(pss_params, defaults_set,
                                           params, libctx))
          return 0;
  
      /* If not a PSS type RSA, sending us PSS parameters is wrong */
      if (rsa_type != RSA_FLAG_TYPE_RSASSAPSS
          && !ossl_rsa_pss_params_30_is_unrestricted(pss_params))
          return 0;
  
      return 1;
  }
  
  static void *rsa_newdata(void *provctx)
  {
      OSSL_LIB_CTX *libctx = PROV_LIBCTX_OF(provctx);
      RSA *rsa;
  
      if (!ossl_prov_is_running())
          return NULL;
  
      rsa = ossl_rsa_new_with_ctx(libctx);
      if (rsa != NULL) {
          RSA_clear_flags(rsa, RSA_FLAG_TYPE_MASK);
          RSA_set_flags(rsa, RSA_FLAG_TYPE_RSA);
      }
      return rsa;
  }
  
  static void *rsapss_newdata(void *provctx)
  {
      OSSL_LIB_CTX *libctx = PROV_LIBCTX_OF(provctx);
      RSA *rsa;
  
      if (!ossl_prov_is_running())
          return NULL;
  
      rsa = ossl_rsa_new_with_ctx(libctx);
      if (rsa != NULL) {
          RSA_clear_flags(rsa, RSA_FLAG_TYPE_MASK);
          RSA_set_flags(rsa, RSA_FLAG_TYPE_RSASSAPSS);
      }
      return rsa;
  }
  
  static void rsa_freedata(void *keydata)
  {
      RSA_free(keydata);
  }
  
  static int rsa_has(const void *keydata, int selection)
  {
      const RSA *rsa = keydata;
      int ok = 1;
  
      if (rsa == NULL || !ossl_prov_is_running())
          return 0;
      if ((selection & RSA_POSSIBLE_SELECTIONS) == 0)
          return 1; /* the selection is not missing */
  
      /* OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS are always available even if empty */
      if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
          ok = ok && (RSA_get0_e(rsa) != NULL);
      if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
          ok = ok && (RSA_get0_n(rsa) != NULL);
      if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
          ok = ok && (RSA_get0_d(rsa) != NULL);
      return ok;
  }
  
  static int rsa_match(const void *keydata1, const void *keydata2, int selection)
  {
      const RSA *rsa1 = keydata1;
      const RSA *rsa2 = keydata2;
      int ok = 1;
  
      if (!ossl_prov_is_running())
          return 0;
  
      /* There is always an |e| */
      ok = ok && BN_cmp(RSA_get0_e(rsa1), RSA_get0_e(rsa2)) == 0;
      if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
          int key_checked = 0;
  
          if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0) {
              const BIGNUM *pa = RSA_get0_n(rsa1);
              const BIGNUM *pb = RSA_get0_n(rsa2);
  
              if (pa != NULL && pb != NULL) {
                  ok = ok && BN_cmp(pa, pb) == 0;
                  key_checked = 1;
              }
          }
          if (!key_checked
              && (selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) {
              const BIGNUM *pa = RSA_get0_d(rsa1);
              const BIGNUM *pb = RSA_get0_d(rsa2);
  
              if (pa != NULL && pb != NULL) {
                  ok = ok && BN_cmp(pa, pb) == 0;
                  key_checked = 1;
              }
          }
          ok = ok && key_checked;
      }
      return ok;
  }
  
  static int rsa_import(void *keydata, int selection, const OSSL_PARAM params[])
  {
      RSA *rsa = keydata;
      int rsa_type;
      int ok = 1;
      int pss_defaults_set = 0;
  
      if (!ossl_prov_is_running() || rsa == NULL)
          return 0;
  
      if ((selection & RSA_POSSIBLE_SELECTIONS) == 0)
          return 0;
  
      rsa_type = RSA_test_flags(rsa, RSA_FLAG_TYPE_MASK);
  
      if ((selection & OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS) != 0)
          ok = ok && pss_params_fromdata(ossl_rsa_get0_pss_params_30(rsa),
                                         &pss_defaults_set,
                                         params, rsa_type,
                                         ossl_rsa_get0_libctx(rsa));
      if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
          int include_private =
              selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY ? 1 : 0;
  
          ok = ok && ossl_rsa_fromdata(rsa, params, include_private);
      }
  
      return ok;
  }
  
  static int rsa_export(void *keydata, int selection,
                        OSSL_CALLBACK *param_callback, void *cbarg)
  {
      RSA *rsa = keydata;
      const RSA_PSS_PARAMS_30 *pss_params = ossl_rsa_get0_pss_params_30(rsa);
      OSSL_PARAM_BLD *tmpl;
      OSSL_PARAM *params = NULL;
      int ok = 1;
  
      if (!ossl_prov_is_running() || rsa == NULL)
          return 0;
  
      if ((selection & RSA_POSSIBLE_SELECTIONS) == 0)
          return 0;
  
      tmpl = OSSL_PARAM_BLD_new();
      if (tmpl == NULL)
          return 0;
  
      if ((selection & OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS) != 0)
          ok = ok && (ossl_rsa_pss_params_30_is_unrestricted(pss_params)
                      || ossl_rsa_pss_params_30_todata(pss_params, tmpl, NULL));
      if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
          int include_private =
              selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY ? 1 : 0;
  
          ok = ok && ossl_rsa_todata(rsa, tmpl, NULL, include_private);
      }
  
      if (!ok || (params = OSSL_PARAM_BLD_to_param(tmpl)) == NULL) {
          ok = 0;
          goto err;
      }
  
      ok = param_callback(params, cbarg);
      OSSL_PARAM_free(params);
  err:
      OSSL_PARAM_BLD_free(tmpl);
      return ok;
  }
  
  #ifdef FIPS_MODULE
  /* In fips mode there are no multi-primes. */
  # define RSA_KEY_MP_TYPES()                                                    \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR1, NULL, 0),                           \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR2, NULL, 0),                           \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT1, NULL, 0),                         \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT2, NULL, 0),                         \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT1, NULL, 0),
  #else
  /*
   * We allow up to 10 prime factors (starting with p, q).
   * NOTE: there is only 9 OSSL_PKEY_PARAM_RSA_COEFFICIENT
   */
  # define RSA_KEY_MP_TYPES()                                                    \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR1, NULL, 0),                           \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR2, NULL, 0),                           \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR3, NULL, 0),                           \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR4, NULL, 0),                           \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR5, NULL, 0),                           \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR6, NULL, 0),                           \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR7, NULL, 0),                           \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR8, NULL, 0),                           \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR9, NULL, 0),                           \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR10, NULL, 0),                          \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT1, NULL, 0),                         \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT2, NULL, 0),                         \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT3, NULL, 0),                         \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT4, NULL, 0),                         \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT5, NULL, 0),                         \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT6, NULL, 0),                         \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT7, NULL, 0),                         \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT8, NULL, 0),                         \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT9, NULL, 0),                         \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT10, NULL, 0),                        \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT1, NULL, 0),                      \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT2, NULL, 0),                      \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT3, NULL, 0),                      \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT4, NULL, 0),                      \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT5, NULL, 0),                      \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT6, NULL, 0),                      \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT7, NULL, 0),                      \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT8, NULL, 0),                      \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT9, NULL, 0),
  #endif
  
  #define RSA_KEY_TYPES()                                                        \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_N, NULL, 0),                                 \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_E, NULL, 0),                                 \
  OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_D, NULL, 0),                                 \
  RSA_KEY_MP_TYPES()
  
  /*
   * This provider can export everything in an RSA key, so we use the exact
   * same type description for export as for import.  Other providers might
   * choose to import full keys, but only export the public parts, and will
   * therefore have the importkey_types and importkey_types functions return
   * different arrays.
   */
  static const OSSL_PARAM rsa_key_types[] = {
      RSA_KEY_TYPES()
      OSSL_PARAM_END
  };
  /*
   * We lied about the amount of factors, exponents and coefficients, the
   * export and import functions can really deal with an infinite amount
   * of these numbers.  However, RSA keys with too many primes are futile,
   * so we at least pretend to have some limits.
   */
  
  static const OSSL_PARAM *rsa_imexport_types(int selection)
  {
      if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
          return rsa_key_types;
      return NULL;
  }
  
  static const OSSL_PARAM *rsa_import_types(int selection)
  {
      return rsa_imexport_types(selection);
  }
  
  static const OSSL_PARAM *rsa_export_types(int selection)
  {
      return rsa_imexport_types(selection);
  }
  
  static int rsa_get_params(void *key, OSSL_PARAM params[])
  {
      RSA *rsa = key;
      const RSA_PSS_PARAMS_30 *pss_params = ossl_rsa_get0_pss_params_30(rsa);
      int rsa_type = RSA_test_flags(rsa, RSA_FLAG_TYPE_MASK);
      OSSL_PARAM *p;
      int empty = RSA_get0_n(rsa) == NULL;
  
      if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_BITS)) != NULL
          && (empty || !OSSL_PARAM_set_int(p, RSA_bits(rsa))))
          return 0;
      if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_SECURITY_BITS)) != NULL
          && (empty || !OSSL_PARAM_set_int(p, RSA_security_bits(rsa))))
          return 0;
      if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_MAX_SIZE)) != NULL
          && (empty || !OSSL_PARAM_set_int(p, RSA_size(rsa))))
          return 0;
  
      /*
       * For restricted RSA-PSS keys, we ignore the default digest request.
       * With RSA-OAEP keys, this may need to be amended.
       */
      if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_DEFAULT_DIGEST)) != NULL
          && (rsa_type != RSA_FLAG_TYPE_RSASSAPSS
              || ossl_rsa_pss_params_30_is_unrestricted(pss_params))) {
          if (!OSSL_PARAM_set_utf8_string(p, RSA_DEFAULT_MD))
              return 0;
      }
  
      /*
       * For non-RSA-PSS keys, we ignore the mandatory digest request.
       * With RSA-OAEP keys, this may need to be amended.
       */
      if ((p = OSSL_PARAM_locate(params,
                                 OSSL_PKEY_PARAM_MANDATORY_DIGEST)) != NULL
          && rsa_type == RSA_FLAG_TYPE_RSASSAPSS
          && !ossl_rsa_pss_params_30_is_unrestricted(pss_params)) {
          const char *mdname =
              ossl_rsa_oaeppss_nid2name(ossl_rsa_pss_params_30_hashalg(pss_params));
  
          if (mdname == NULL || !OSSL_PARAM_set_utf8_string(p, mdname))
              return 0;
      }
      return (rsa_type != RSA_FLAG_TYPE_RSASSAPSS
              || ossl_rsa_pss_params_30_todata(pss_params, NULL, params))
          && ossl_rsa_todata(rsa, NULL, params, 1);
  }
  
  static const OSSL_PARAM rsa_params[] = {
      OSSL_PARAM_int(OSSL_PKEY_PARAM_BITS, NULL),
      OSSL_PARAM_int(OSSL_PKEY_PARAM_SECURITY_BITS, NULL),
      OSSL_PARAM_int(OSSL_PKEY_PARAM_MAX_SIZE, NULL),
      OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_DEFAULT_DIGEST, NULL, 0),
      RSA_KEY_TYPES()
      OSSL_PARAM_END
  };
  
  static const OSSL_PARAM *rsa_gettable_params(void *provctx)
  {
      return rsa_params;
  }
  
  static int rsa_validate(const void *keydata, int selection, int checktype)
  {
      const RSA *rsa = keydata;
      int ok = 1;
  
      if (!ossl_prov_is_running())
          return 0;
  
      if ((selection & RSA_POSSIBLE_SELECTIONS) == 0)
          return 1; /* nothing to validate */
  
      /* If the whole key is selected, we do a pairwise validation */
      if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR)
          == OSSL_KEYMGMT_SELECT_KEYPAIR) {
          ok = ok && ossl_rsa_validate_pairwise(rsa);
      } else {
          if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
              ok = ok && ossl_rsa_validate_private(rsa);
          if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
              ok = ok && ossl_rsa_validate_public(rsa);
      }
      return ok;
  }
  
  struct rsa_gen_ctx {
      OSSL_LIB_CTX *libctx;
      const char *propq;
  
      int rsa_type;
  
      size_t nbits;
      BIGNUM *pub_exp;
      size_t primes;
  
      /* For PSS */
      RSA_PSS_PARAMS_30 pss_params;
      int pss_defaults_set;
  
      /* For generation callback */
      OSSL_CALLBACK *cb;
      void *cbarg;
  
  #if defined(FIPS_MODULE) && !defined(OPENSSL_NO_ACVP_TESTS)
      /* ACVP test parameters */
      OSSL_PARAM *acvp_test_params;
  #endif
  };
  
  static int rsa_gencb(int p, int n, BN_GENCB *cb)
  {
      struct rsa_gen_ctx *gctx = BN_GENCB_get_arg(cb);
      OSSL_PARAM params[] = { OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END };
  
      params[0] = OSSL_PARAM_construct_int(OSSL_GEN_PARAM_POTENTIAL, &p);
      params[1] = OSSL_PARAM_construct_int(OSSL_GEN_PARAM_ITERATION, &n);
      return gctx->cb(params, gctx->cbarg);
  }
  
  static void *gen_init(void *provctx, int selection, int rsa_type,
                        const OSSL_PARAM params[])
  {
      OSSL_LIB_CTX *libctx = PROV_LIBCTX_OF(provctx);
      struct rsa_gen_ctx *gctx = NULL;
  
      if (!ossl_prov_is_running())
          return NULL;
  
      if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) == 0)
          return NULL;
  
      if ((gctx = OPENSSL_zalloc(sizeof(*gctx))) != NULL) {
          gctx->libctx = libctx;
          if ((gctx->pub_exp = BN_new()) == NULL
              || !BN_set_word(gctx->pub_exp, RSA_F4)) {
              goto err;
          }
          gctx->nbits = 2048;
          gctx->primes = RSA_DEFAULT_PRIME_NUM;
          gctx->rsa_type = rsa_type;
      } else {
          goto err;
      }
  
      if (!rsa_gen_set_params(gctx, params))
          goto err;
      return gctx;
  
  err:
      if (gctx != NULL)
          BN_free(gctx->pub_exp);
      OPENSSL_free(gctx);
      return NULL;
  }
  
  static void *rsa_gen_init(void *provctx, int selection,
                            const OSSL_PARAM params[])
  {
      return gen_init(provctx, selection, RSA_FLAG_TYPE_RSA, params);
  }
  
  static void *rsapss_gen_init(void *provctx, int selection,
                               const OSSL_PARAM params[])
  {
      return gen_init(provctx, selection, RSA_FLAG_TYPE_RSASSAPSS, params);
  }
  
  /*
   * This function is common for all RSA sub-types, to detect possible
   * misuse, such as PSS parameters being passed when a plain RSA key
   * is generated.
   */
  static int rsa_gen_set_params(void *genctx, const OSSL_PARAM params[])
  {
      struct rsa_gen_ctx *gctx = genctx;
      const OSSL_PARAM *p;
  
      if (params == NULL)
          return 1;
  
      if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_RSA_BITS)) != NULL) {
          if (!OSSL_PARAM_get_size_t(p, &gctx->nbits))
              return 0;
          if (gctx->nbits < RSA_MIN_MODULUS_BITS) {
              ERR_raise(ERR_LIB_PROV, PROV_R_KEY_SIZE_TOO_SMALL);
              return 0;
          }
      }
      if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_RSA_PRIMES)) != NULL
          && !OSSL_PARAM_get_size_t(p, &gctx->primes))
          return 0;
      if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_RSA_E)) != NULL
          && !OSSL_PARAM_get_BN(p, &gctx->pub_exp))
          return 0;
      /* Only attempt to get PSS parameters when generating an RSA-PSS key */
      if (gctx->rsa_type == RSA_FLAG_TYPE_RSASSAPSS
          && !pss_params_fromdata(&gctx->pss_params, &gctx->pss_defaults_set, params,
                                  gctx->rsa_type, gctx->libctx))
          return 0;
  #if defined(FIPS_MODULE) && !defined(OPENSSL_NO_ACVP_TESTS)
      /* Any ACVP test related parameters are copied into a params[] */
      if (!ossl_rsa_acvp_test_gen_params_new(&gctx->acvp_test_params, params))
          return 0;
  #endif
      return 1;
  }
  
  #define rsa_gen_basic                                           \
      OSSL_PARAM_size_t(OSSL_PKEY_PARAM_RSA_BITS, NULL),          \
      OSSL_PARAM_size_t(OSSL_PKEY_PARAM_RSA_PRIMES, NULL),        \
      OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_E, NULL, 0)
  
  /*
   * The following must be kept in sync with ossl_rsa_pss_params_30_fromdata()
   * in crypto/rsa/rsa_backend.c
   */
  #define rsa_gen_pss                                                     \
      OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_RSA_DIGEST, NULL, 0),        \
      OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_RSA_DIGEST_PROPS, NULL, 0),  \
      OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_RSA_MASKGENFUNC, NULL, 0),   \
      OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_RSA_MGF1_DIGEST, NULL, 0),   \
      OSSL_PARAM_int(OSSL_PKEY_PARAM_RSA_PSS_SALTLEN, NULL)
  
  static const OSSL_PARAM *rsa_gen_settable_params(ossl_unused void *genctx,
                                                   ossl_unused void *provctx)
  {
      static OSSL_PARAM settable[] = {
          rsa_gen_basic,
          OSSL_PARAM_END
      };
  
      return settable;
  }
  
  static const OSSL_PARAM *rsapss_gen_settable_params(ossl_unused void *genctx,
                                                      ossl_unused void *provctx)
  {
      static OSSL_PARAM settable[] = {
          rsa_gen_basic,
          rsa_gen_pss,
          OSSL_PARAM_END
      };
  
      return settable;
  }
  
  static void *rsa_gen(void *genctx, OSSL_CALLBACK *osslcb, void *cbarg)
  {
      struct rsa_gen_ctx *gctx = genctx;
      RSA *rsa = NULL, *rsa_tmp = NULL;
      BN_GENCB *gencb = NULL;
  
      if (!ossl_prov_is_running() || gctx == NULL)
          return NULL;
  
      switch (gctx->rsa_type) {
      case RSA_FLAG_TYPE_RSA:
          /* For plain RSA keys, PSS parameters must not be set */
          if (!ossl_rsa_pss_params_30_is_unrestricted(&gctx->pss_params))
              goto err;
          break;
      case RSA_FLAG_TYPE_RSASSAPSS:
          /*
           * For plain RSA-PSS keys, PSS parameters may be set but don't have
           * to, so not check.
           */
          break;
      default:
          /* Unsupported RSA key sub-type... */
          return NULL;
      }
  
      if ((rsa_tmp = ossl_rsa_new_with_ctx(gctx->libctx)) == NULL)
          return NULL;
  
      gctx->cb = osslcb;
      gctx->cbarg = cbarg;
      gencb = BN_GENCB_new();
      if (gencb != NULL)
          BN_GENCB_set(gencb, rsa_gencb, genctx);
  
  #if defined(FIPS_MODULE) && !defined(OPENSSL_NO_ACVP_TESTS)
      if (gctx->acvp_test_params != NULL) {
          if (!ossl_rsa_acvp_test_set_params(rsa_tmp, gctx->acvp_test_params))
              goto err;
      }
  #endif
  
      if (!RSA_generate_multi_prime_key(rsa_tmp,
                                        (int)gctx->nbits, (int)gctx->primes,
                                        gctx->pub_exp, gencb))
          goto err;
  
      if (!ossl_rsa_pss_params_30_copy(ossl_rsa_get0_pss_params_30(rsa_tmp),
                                       &gctx->pss_params))
          goto err;
  
      RSA_clear_flags(rsa_tmp, RSA_FLAG_TYPE_MASK);
      RSA_set_flags(rsa_tmp, gctx->rsa_type);
  
      rsa = rsa_tmp;
      rsa_tmp = NULL;
   err:
      BN_GENCB_free(gencb);
      RSA_free(rsa_tmp);
      return rsa;
  }
  
  static void rsa_gen_cleanup(void *genctx)
  {
      struct rsa_gen_ctx *gctx = genctx;
  
      if (gctx == NULL)
          return;
  #if defined(FIPS_MODULE) && !defined(OPENSSL_NO_ACVP_TESTS)
      ossl_rsa_acvp_test_gen_params_free(gctx->acvp_test_params);
      gctx->acvp_test_params = NULL;
  #endif
      BN_clear_free(gctx->pub_exp);
      OPENSSL_free(gctx);
  }
  
  static void *common_load(const void *reference, size_t reference_sz,
                           int expected_rsa_type)
  {
      RSA *rsa = NULL;
  
      if (ossl_prov_is_running() && reference_sz == sizeof(rsa)) {
          /* The contents of the reference is the address to our object */
          rsa = *(RSA **)reference;
  
          if (RSA_test_flags(rsa, RSA_FLAG_TYPE_MASK) != expected_rsa_type)
              return NULL;
  
          /* We grabbed, so we detach it */
          *(RSA **)reference = NULL;
          return rsa;
      }
      return NULL;
  }
  
  static void *rsa_load(const void *reference, size_t reference_sz)
  {
      return common_load(reference, reference_sz, RSA_FLAG_TYPE_RSA);
  }
  
  static void *rsapss_load(const void *reference, size_t reference_sz)
  {
      return common_load(reference, reference_sz, RSA_FLAG_TYPE_RSASSAPSS);
  }
  
  static void *rsa_dup(const void *keydata_from, int selection)
  {
      if (ossl_prov_is_running()
          /* do not allow creating empty keys by duplication */
          && (selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
          return ossl_rsa_dup(keydata_from, selection);
      return NULL;
  }
  
  /* For any RSA key, we use the "RSA" algorithms regardless of sub-type. */
  static const char *rsa_query_operation_name(int operation_id)
  {
      return "RSA";
  }
  
  const OSSL_DISPATCH ossl_rsa_keymgmt_functions[] = {
      { OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))rsa_newdata },
      { OSSL_FUNC_KEYMGMT_GEN_INIT, (void (*)(void))rsa_gen_init },
      { OSSL_FUNC_KEYMGMT_GEN_SET_PARAMS,
        (void (*)(void))rsa_gen_set_params },
      { OSSL_FUNC_KEYMGMT_GEN_SETTABLE_PARAMS,
        (void (*)(void))rsa_gen_settable_params },
      { OSSL_FUNC_KEYMGMT_GEN, (void (*)(void))rsa_gen },
      { OSSL_FUNC_KEYMGMT_GEN_CLEANUP, (void (*)(void))rsa_gen_cleanup },
      { OSSL_FUNC_KEYMGMT_LOAD, (void (*)(void))rsa_load },
      { OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))rsa_freedata },
      { OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*) (void))rsa_get_params },
      { OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*) (void))rsa_gettable_params },
      { OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))rsa_has },
      { OSSL_FUNC_KEYMGMT_MATCH, (void (*)(void))rsa_match },
      { OSSL_FUNC_KEYMGMT_VALIDATE, (void (*)(void))rsa_validate },
      { OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))rsa_import },
      { OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))rsa_import_types },
      { OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))rsa_export },
      { OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))rsa_export_types },
      { OSSL_FUNC_KEYMGMT_DUP, (void (*)(void))rsa_dup },
      { 0, NULL }
  };
  
  const OSSL_DISPATCH ossl_rsapss_keymgmt_functions[] = {
      { OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))rsapss_newdata },
      { OSSL_FUNC_KEYMGMT_GEN_INIT, (void (*)(void))rsapss_gen_init },
      { OSSL_FUNC_KEYMGMT_GEN_SET_PARAMS, (void (*)(void))rsa_gen_set_params },
      { OSSL_FUNC_KEYMGMT_GEN_SETTABLE_PARAMS,
        (void (*)(void))rsapss_gen_settable_params },
      { OSSL_FUNC_KEYMGMT_GEN, (void (*)(void))rsa_gen },
      { OSSL_FUNC_KEYMGMT_GEN_CLEANUP, (void (*)(void))rsa_gen_cleanup },
      { OSSL_FUNC_KEYMGMT_LOAD, (void (*)(void))rsapss_load },
      { OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))rsa_freedata },
      { OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*) (void))rsa_get_params },
      { OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*) (void))rsa_gettable_params },
      { OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))rsa_has },
      { OSSL_FUNC_KEYMGMT_MATCH, (void (*)(void))rsa_match },
      { OSSL_FUNC_KEYMGMT_VALIDATE, (void (*)(void))rsa_validate },
      { OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))rsa_import },
      { OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))rsa_import_types },
      { OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))rsa_export },
      { OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))rsa_export_types },
      { OSSL_FUNC_KEYMGMT_QUERY_OPERATION_NAME,
        (void (*)(void))rsa_query_operation_name },
      { OSSL_FUNC_KEYMGMT_DUP, (void (*)(void))rsa_dup },
      { 0, NULL }
  };
  