providers/implementations/keymgmt/rsa_kmgmt.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/core_dispatch.h>
  17 #include <openssl/core_names.h>
  18 #include <openssl/bn.h>
  19 #include <openssl/err.h>
  20 #include <openssl/rsa.h>
  21 #include <openssl/evp.h>
  22 #include "prov/implementations.h"
  23 #include "prov/providercommon.h"
  24 #include "prov/provider_ctx.h"
  25 #include "crypto/rsa.h"
  26 #include "internal/param_build_set.h"
  27
  28 static OSSL_OP_keymgmt_new_fn rsa_newdata;
  29 static OSSL_OP_keymgmt_new_fn rsapss_newdata;
  30 static OSSL_OP_keymgmt_gen_init_fn rsa_gen_init;
  31 static OSSL_OP_keymgmt_gen_init_fn rsapss_gen_init;
  32 static OSSL_OP_keymgmt_gen_set_params_fn rsa_gen_set_params;
  33 static OSSL_OP_keymgmt_gen_settable_params_fn rsa_gen_settable_params;
  34 static OSSL_OP_keymgmt_gen_settable_params_fn rsapss_gen_settable_params;
  35 static OSSL_OP_keymgmt_gen_fn rsa_gen;
  36 static OSSL_OP_keymgmt_gen_cleanup_fn rsa_gen_cleanup;
  37 static OSSL_OP_keymgmt_free_fn rsa_freedata;
  38 static OSSL_OP_keymgmt_get_params_fn rsa_get_params;
  39 static OSSL_OP_keymgmt_gettable_params_fn rsa_gettable_params;
  40 static OSSL_OP_keymgmt_has_fn rsa_has;
  41 static OSSL_OP_keymgmt_match_fn rsa_match;
  42 static OSSL_OP_keymgmt_validate_fn rsa_validate;
  43 static OSSL_OP_keymgmt_import_fn rsa_import;
  44 static OSSL_OP_keymgmt_import_types_fn rsa_import_types;
  45 static OSSL_OP_keymgmt_export_fn rsa_export;
  46 static OSSL_OP_keymgmt_export_types_fn rsa_export_types;
  47 static OSSL_OP_keymgmt_query_operation_name_fn rsapss_query_operation_name;
  48
  49 #define RSA_DEFAULT_MD "SHA256"
  50 #define RSA_PSS_DEFAULT_MD OSSL_DIGEST_NAME_SHA1
  51 #define RSA_POSSIBLE_SELECTIONS                                        \
  52     (OSSL_KEYMGMT_SELECT_KEYPAIR | OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS)
  53
  54 DEFINE_STACK_OF(BIGNUM)
  55 DEFINE_SPECIAL_STACK_OF_CONST(BIGNUM_const, BIGNUM)
  56
  57 static int pss_params_fromdata(RSA_PSS_PARAMS_30 *pss_params,
  58                                const OSSL_PARAM params[], int rsa_type,
  59                                OPENSSL_CTX *libctx)
  60 {
  61     if (!rsa_pss_params_30_fromdata(pss_params, params, libctx))
  62         return 0;
  63
  64     /* If not a PSS type RSA, sending us PSS parameters is wrong */
  65     if (rsa_type != RSA_FLAG_TYPE_RSASSAPSS
  66         && !rsa_pss_params_30_is_unrestricted(pss_params))
  67         return 0;
  68
  69     return 1;
  70 }
  71
  72 static void *rsa_newdata(void *provctx)
  73 {
  74     OPENSSL_CTX *libctx = PROV_LIBRARY_CONTEXT_OF(provctx);
  75     RSA *rsa = rsa_new_with_ctx(libctx);
  76
  77     if (rsa != NULL) {
  78         RSA_clear_flags(rsa, RSA_FLAG_TYPE_MASK);
  79         RSA_set_flags(rsa, RSA_FLAG_TYPE_RSA);
  80     }
  81     return rsa;
  82 }
  83
  84 static void *rsapss_newdata(void *provctx)
  85 {
  86     OPENSSL_CTX *libctx = PROV_LIBRARY_CONTEXT_OF(provctx);
  87     RSA *rsa = rsa_new_with_ctx(libctx);
  88
  89     if (rsa != NULL) {
  90         RSA_clear_flags(rsa, RSA_FLAG_TYPE_MASK);
  91         RSA_set_flags(rsa, RSA_FLAG_TYPE_RSASSAPSS);
  92     }
  93     return rsa;
  94 }
  95
  96 static void rsa_freedata(void *keydata)
  97 {
  98     RSA_free(keydata);
  99 }
 100
 101 static int rsa_has(void *keydata, int selection)
 102 {
 103     RSA *rsa = keydata;
 104     int ok = 0;
 105
 106     if (rsa != NULL) {
 107         if ((selection & RSA_POSSIBLE_SELECTIONS) != 0)
 108             ok = 1;
 109
 110         if ((selection & OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS) != 0)
 111             /* This will change with OAEP */
 112             ok = ok && (RSA_test_flags(rsa, RSA_FLAG_TYPE_RSASSAPSS) != 0);
 113         if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
 114             ok = ok && (RSA_get0_e(rsa) != NULL);
 115         if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
 116             ok = ok && (RSA_get0_n(rsa) != NULL);
 117         if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
 118             ok = ok && (RSA_get0_d(rsa) != NULL);
 119     }
 120     return ok;
 121 }
 122
 123 static int rsa_match(const void *keydata1, const void *keydata2, int selection)
 124 {
 125     const RSA *rsa1 = keydata1;
 126     const RSA *rsa2 = keydata2;
 127     int ok = 1;
 128
 129     /* There is always an |e| */
 130     ok = ok && BN_cmp(RSA_get0_e(rsa1), RSA_get0_e(rsa2)) == 0;
 131     if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
 132         ok = ok && BN_cmp(RSA_get0_n(rsa1), RSA_get0_n(rsa2)) == 0;
 133     if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
 134         ok = ok && BN_cmp(RSA_get0_d(rsa1), RSA_get0_d(rsa2)) == 0;
 135     return ok;
 136 }
 137
 138 static int rsa_import(void *keydata, int selection, const OSSL_PARAM params[])
 139 {
 140     RSA *rsa = keydata;
 141     int rsa_type;
 142     int ok = 1;
 143
 144     if (rsa == NULL)
 145         return 0;
 146
 147     if ((selection & RSA_POSSIBLE_SELECTIONS) == 0)
 148         return 0;
 149
 150     rsa_type = RSA_test_flags(rsa, RSA_FLAG_TYPE_MASK);
 151
 152     /* TODO(3.0) OAEP should bring on parameters as well */
 153
 154     if ((selection & OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS) != 0)
 155         ok = ok && pss_params_fromdata(rsa_get0_pss_params_30(rsa), params,
 156                                        rsa_type, rsa_get0_libctx(rsa));
 157     if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
 158         ok = ok && rsa_fromdata(rsa, params);
 159
 160     return ok;
 161 }
 162
 163 static int rsa_export(void *keydata, int selection,
 164                       OSSL_CALLBACK *param_callback, void *cbarg)
 165 {
 166     RSA *rsa = keydata;
 167     const RSA_PSS_PARAMS_30 *pss_params = rsa_get0_pss_params_30(rsa);
 168     OSSL_PARAM_BLD *tmpl;
 169     OSSL_PARAM *params = NULL;
 170     int ok = 1;
 171
 172     if (rsa == NULL)
 173         return 0;
 174
 175     /* TODO(3.0) OAEP should bring on parameters */
 176
 177     tmpl = OSSL_PARAM_BLD_new();
 178     if (tmpl == NULL)
 179         return 0;
 180
 181     if ((selection & OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS) != 0)
 182         ok = ok && (rsa_pss_params_30_is_unrestricted(pss_params)
 183                     || rsa_pss_params_30_todata(pss_params, NULL, tmpl, NULL));
 184     if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
 185         ok = ok && rsa_todata(rsa, tmpl, NULL);
 186
 187     if (!ok
 188         || (params = OSSL_PARAM_BLD_to_param(tmpl)) == NULL)
 189         goto err;
 190
 191     ok = param_callback(params, cbarg);
 192     OSSL_PARAM_BLD_free_params(params);
 193 err:
 194     OSSL_PARAM_BLD_free(tmpl);
 195     return ok;
 196 }
 197
 198 #ifdef FIPS_MODULE
 199 /* In fips mode there are no multi-primes. */
 200 # define RSA_KEY_MP_TYPES()                                                    \
 201 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR1, NULL, 0),                           \
 202 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR2, NULL, 0),                           \
 203 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT1, NULL, 0),                         \
 204 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT2, NULL, 0),                         \
 205 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT1, NULL, 0),
 206 #else
 207 /*
 208  * We allow up to 10 prime factors (starting with p, q).
 209  * NOTE: there is only 9 OSSL_PKEY_PARAM_RSA_COEFFICIENT
 210  */
 211 # define RSA_KEY_MP_TYPES()                                                    \
 212 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR1, NULL, 0),                           \
 213 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR2, NULL, 0),                           \
 214 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR3, NULL, 0),                           \
 215 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR4, NULL, 0),                           \
 216 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR5, NULL, 0),                           \
 217 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR6, NULL, 0),                           \
 218 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR7, NULL, 0),                           \
 219 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR8, NULL, 0),                           \
 220 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR9, NULL, 0),                           \
 221 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR10, NULL, 0),                          \
 222 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT1, NULL, 0),                         \
 223 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT2, NULL, 0),                         \
 224 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT3, NULL, 0),                         \
 225 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT4, NULL, 0),                         \
 226 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT5, NULL, 0),                         \
 227 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT6, NULL, 0),                         \
 228 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT7, NULL, 0),                         \
 229 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT8, NULL, 0),                         \
 230 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT9, NULL, 0),                         \
 231 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT10, NULL, 0),                        \
 232 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT1, NULL, 0),                      \
 233 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT2, NULL, 0),                      \
 234 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT3, NULL, 0),                      \
 235 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT4, NULL, 0),                      \
 236 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT5, NULL, 0),                      \
 237 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT6, NULL, 0),                      \
 238 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT7, NULL, 0),                      \
 239 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT8, NULL, 0),                      \
 240 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT9, NULL, 0),
 241 #endif
 242
 243 #define RSA_KEY_TYPES()                                                        \
 244 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_N, NULL, 0),                                 \
 245 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_E, NULL, 0),                                 \
 246 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_D, NULL, 0),                                 \
 247 RSA_KEY_MP_TYPES()
 248
 249 /*
 250  * This provider can export everything in an RSA key, so we use the exact
 251  * same type description for export as for import.  Other providers might
 252  * choose to import full keys, but only export the public parts, and will
 253  * therefore have the importkey_types and importkey_types functions return
 254  * different arrays.
 255  */
 256 static const OSSL_PARAM rsa_key_types[] = {
 257     RSA_KEY_TYPES()
 258     OSSL_PARAM_END
 259 };
 260 /*
 261  * We lied about the amount of factors, exponents and coefficients, the
 262  * export and import functions can really deal with an infinite amount
 263  * of these numbers.  However, RSA keys with too many primes are futile,
 264  * so we at least pretend to have some limits.
 265  */
 266
 267 static const OSSL_PARAM *rsa_imexport_types(int selection)
 268 {
 269     if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
 270         return rsa_key_types;
 271     return NULL;
 272 }
 273
 274 static const OSSL_PARAM *rsa_import_types(int selection)
 275 {
 276     return rsa_imexport_types(selection);
 277 }
 278
 279 static const OSSL_PARAM *rsa_export_types(int selection)
 280 {
 281     return rsa_imexport_types(selection);
 282 }
 283
 284 static int rsa_get_params(void *key, OSSL_PARAM params[])
 285 {
 286     RSA *rsa = key;
 287     const RSA_PSS_PARAMS_30 *pss_params = rsa_get0_pss_params_30(rsa);
 288     int rsa_type = RSA_test_flags(rsa, RSA_FLAG_TYPE_MASK);
 289     OSSL_PARAM *p;
 290
 291     if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_BITS)) != NULL
 292         && !OSSL_PARAM_set_int(p, RSA_bits(rsa)))
 293         return 0;
 294     if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_SECURITY_BITS)) != NULL
 295         && !OSSL_PARAM_set_int(p, RSA_security_bits(rsa)))
 296         return 0;
 297     if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_MAX_SIZE)) != NULL
 298         && !OSSL_PARAM_set_int(p, RSA_size(rsa)))
 299         return 0;
 300
 301     /*
 302      * For RSA-PSS keys, we ignore the default digest request
 303      * TODO(3.0) with RSA-OAEP keys, this may need to be amended
 304      */
 305     if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_DEFAULT_DIGEST)) != NULL
 306         && rsa_type != RSA_FLAG_TYPE_RSASSAPSS) {
 307         if (!OSSL_PARAM_set_utf8_string(p, RSA_DEFAULT_MD))
 308             return 0;
 309     }
 310
 311     /*
 312      * For non-RSA-PSS keys, we ignore the mandatory digest request
 313      * TODO(3.0) with RSA-OAEP keys, this may need to be amended
 314      */
 315     if ((p = OSSL_PARAM_locate(params,
 316                                OSSL_PKEY_PARAM_MANDATORY_DIGEST)) != NULL
 317         && rsa_type == RSA_FLAG_TYPE_RSASSAPSS) {
 318         const char *mdname = RSA_PSS_DEFAULT_MD;
 319
 320         if (!rsa_pss_params_30_is_unrestricted(pss_params)) {
 321             mdname =
 322                 rsa_oaeppss_nid2name(rsa_pss_params_30_hashalg(pss_params));
 323
 324             if (mdname == NULL || !OSSL_PARAM_set_utf8_string(p, mdname))
 325                 return 0;
 326         }
 327     }
 328     return (rsa_type != RSA_FLAG_TYPE_RSASSAPSS
 329             || rsa_pss_params_30_todata(pss_params, NULL, NULL, params))
 330         && rsa_todata(rsa, NULL, params);
 331 }
 332
 333 static const OSSL_PARAM rsa_params[] = {
 334     OSSL_PARAM_int(OSSL_PKEY_PARAM_BITS, NULL),
 335     OSSL_PARAM_int(OSSL_PKEY_PARAM_SECURITY_BITS, NULL),
 336     OSSL_PARAM_int(OSSL_PKEY_PARAM_MAX_SIZE, NULL),
 337     OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_DEFAULT_DIGEST, NULL, 0),
 338     RSA_KEY_TYPES()
 339     OSSL_PARAM_END
 340 };
 341
 342 static const OSSL_PARAM *rsa_gettable_params(void)
 343 {
 344     return rsa_params;
 345 }
 346
 347 static int rsa_validate(void *keydata, int selection)
 348 {
 349     RSA *rsa = keydata;
 350     int ok = 0;
 351
 352     if ((selection & RSA_POSSIBLE_SELECTIONS) != 0)
 353         ok = 1;
 354
 355     /* If the whole key is selected, we do a pairwise validation */
 356     if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR)
 357         == OSSL_KEYMGMT_SELECT_KEYPAIR) {
 358         ok = ok && rsa_validate_pairwise(rsa);
 359     } else {
 360         if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
 361             ok = ok && rsa_validate_private(rsa);
 362         if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
 363             ok = ok && rsa_validate_public(rsa);
 364     }
 365     return ok;
 366 }
 367
 368 struct rsa_gen_ctx {
 369     OPENSSL_CTX *libctx;
 370
 371     int rsa_type;
 372
 373     size_t nbits;
 374     BIGNUM *pub_exp;
 375     size_t primes;
 376
 377     /* For PSS */
 378     RSA_PSS_PARAMS_30 pss_params;
 379
 380     /* For generation callback */
 381     OSSL_CALLBACK *cb;
 382     void *cbarg;
 383
 384 #if defined(FIPS_MODULE) && !defined(OPENSSL_NO_ACVP_TESTS)
 385     /* ACVP test parameters */
 386     OSSL_PARAM *acvp_test_params;
 387 #endif
 388 };
 389
 390 static int rsa_gencb(int p, int n, BN_GENCB *cb)
 391 {
 392     struct rsa_gen_ctx *gctx = BN_GENCB_get_arg(cb);
 393     OSSL_PARAM params[] = { OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END };
 394
 395     params[0] = OSSL_PARAM_construct_int(OSSL_GEN_PARAM_POTENTIAL, &p);
 396     params[1] = OSSL_PARAM_construct_int(OSSL_GEN_PARAM_ITERATION, &n);
 397     return gctx->cb(params, gctx->cbarg);
 398 }
 399
 400 static void *gen_init(void *provctx, int selection, int rsa_type)
 401 {
 402     OPENSSL_CTX *libctx = PROV_LIBRARY_CONTEXT_OF(provctx);
 403     struct rsa_gen_ctx *gctx = NULL;
 404
 405     if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) == 0)
 406         return NULL;
 407
 408     if ((gctx = OPENSSL_zalloc(sizeof(*gctx))) != NULL) {
 409         gctx->libctx = libctx;
 410         if ((gctx->pub_exp = BN_new()) == NULL
 411             || !BN_set_word(gctx->pub_exp, RSA_F4)) {
 412             BN_free(gctx->pub_exp);
 413             OPENSSL_free(gctx);
 414             gctx = NULL;
 415         } else {
 416             gctx->nbits = 2048;
 417             gctx->primes = RSA_DEFAULT_PRIME_NUM;
 418             gctx->rsa_type = rsa_type;
 419         }
 420     }
 421     return gctx;
 422 }
 423
 424 static void *rsa_gen_init(void *provctx, int selection)
 425 {
 426     return gen_init(provctx, selection, RSA_FLAG_TYPE_RSA);
 427 }
 428
 429 static void *rsapss_gen_init(void *provctx, int selection)
 430 {
 431     return gen_init(provctx, selection, RSA_FLAG_TYPE_RSASSAPSS);
 432 }
 433
 434 /*
 435  * This function is common for all RSA sub-types, to detect possible
 436  * misuse, such as PSS parameters being passed when a plain RSA key
 437  * is generated.
 438  */
 439 static int rsa_gen_set_params(void *genctx, const OSSL_PARAM params[])
 440 {
 441     struct rsa_gen_ctx *gctx = genctx;
 442     const OSSL_PARAM *p;
 443
 444     if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_RSA_BITS)) != NULL
 445         && !OSSL_PARAM_get_size_t(p, &gctx->nbits))
 446         return 0;
 447     if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_RSA_PRIMES)) != NULL
 448         && !OSSL_PARAM_get_size_t(p, &gctx->primes))
 449         return 0;
 450     if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_RSA_E)) != NULL
 451         && !OSSL_PARAM_get_BN(p, &gctx->pub_exp))
 452         return 0;
 453     /* Only attempt to get PSS parameters when generating an RSA-PSS key */
 454     if (gctx->rsa_type == RSA_FLAG_TYPE_RSASSAPSS
 455         && !pss_params_fromdata(&gctx->pss_params, params, gctx->rsa_type,
 456                                 gctx->libctx))
 457         return 0;
 458 #if defined(FIPS_MODULE) && !defined(OPENSSL_NO_ACVP_TESTS)
 459     /* Any ACVP test related parameters are copied into a params[] */
 460     if (!rsa_acvp_test_gen_params_new(&gctx->acvp_test_params, params))
 461         return 0;
 462 #endif
 463     return 1;
 464 }
 465
 466 #define rsa_gen_basic                                           \
 467     OSSL_PARAM_size_t(OSSL_PKEY_PARAM_RSA_BITS, NULL),          \
 468     OSSL_PARAM_size_t(OSSL_PKEY_PARAM_RSA_PRIMES, NULL),        \
 469     OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_E, NULL, 0)
 470
 471 /*
 472  * The following must be kept in sync with rsa_pss_params_30_fromdata()
 473  * in crypto/rsa/rsa_backend.c
 474  */
 475 #define rsa_gen_pss                                                     \
 476     OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_RSA_DIGEST, NULL, 0),        \
 477     OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_RSA_MASKGENFUNC, NULL, 0),   \
 478     OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_RSA_MGF1_DIGEST, NULL, 0),   \
 479     OSSL_PARAM_int(OSSL_PKEY_PARAM_RSA_PSS_SALTLEN, NULL)
 480
 481 static const OSSL_PARAM *rsa_gen_settable_params(void *provctx)
 482 {
 483     static OSSL_PARAM settable[] = {
 484         rsa_gen_basic,
 485         OSSL_PARAM_END
 486     };
 487
 488     return settable;
 489 }
 490
 491 static const OSSL_PARAM *rsapss_gen_settable_params(void *provctx)
 492 {
 493     static OSSL_PARAM settable[] = {
 494         rsa_gen_basic,
 495         rsa_gen_pss,
 496         OSSL_PARAM_END
 497     };
 498
 499     return settable;
 500 }
 501
 502 static void *rsa_gen(void *genctx, OSSL_CALLBACK *osslcb, void *cbarg)
 503 {
 504     struct rsa_gen_ctx *gctx = genctx;
 505     RSA *rsa = NULL, *rsa_tmp = NULL;
 506     BN_GENCB *gencb = NULL;
 507
 508     if (gctx == NULL)
 509         return NULL;
 510
 511     switch (gctx->rsa_type) {
 512     case RSA_FLAG_TYPE_RSA:
 513         /* For plain RSA keys, PSS parameters must not be set */
 514         if (!rsa_pss_params_30_is_unrestricted(&gctx->pss_params))
 515             goto err;
 516         break;
 517     case RSA_FLAG_TYPE_RSASSAPSS:
 518         /*
 519          * For plain RSA-PSS keys, PSS parameters may be set but don't have
 520          * to, so not check.
 521          */
 522         break;
 523     default:
 524         /* Unsupported RSA key sub-type... */
 525         return NULL;
 526     }
 527
 528     if ((rsa_tmp = rsa_new_with_ctx(gctx->libctx)) == NULL)
 529         return NULL;
 530
 531     gctx->cb = osslcb;
 532     gctx->cbarg = cbarg;
 533     gencb = BN_GENCB_new();
 534     if (gencb != NULL)
 535         BN_GENCB_set(gencb, rsa_gencb, genctx);
 536
 537 #if defined(FIPS_MODULE) && !defined(OPENSSL_NO_ACVP_TESTS)
 538     if (gctx->acvp_test_params != NULL) {
 539         if (!rsa_acvp_test_set_params(rsa_tmp, gctx->acvp_test_params))
 540             goto err;
 541     }
 542 #endif
 543
 544     if (!RSA_generate_multi_prime_key(rsa_tmp,
 545                                       (int)gctx->nbits, (int)gctx->primes,
 546                                       gctx->pub_exp, gencb))
 547         goto err;
 548
 549     if (!rsa_pss_params_30_copy(rsa_get0_pss_params_30(rsa_tmp),
 550                                 &gctx->pss_params))
 551         goto err;
 552
 553     RSA_clear_flags(rsa_tmp, RSA_FLAG_TYPE_MASK);
 554     RSA_set_flags(rsa_tmp, gctx->rsa_type);
 555
 556     rsa = rsa_tmp;
 557     rsa_tmp = NULL;
 558  err:
 559     BN_GENCB_free(gencb);
 560     RSA_free(rsa_tmp);
 561     return rsa;
 562 }
 563
 564 static void rsa_gen_cleanup(void *genctx)
 565 {
 566     struct rsa_gen_ctx *gctx = genctx;
 567
 568     if (gctx == NULL)
 569         return;
 570 #if defined(FIPS_MODULE) && !defined(OPENSSL_NO_ACVP_TESTS)
 571     rsa_acvp_test_gen_params_free(gctx->acvp_test_params);
 572     gctx->acvp_test_params = NULL;
 573 #endif
 574     BN_clear_free(gctx->pub_exp);
 575     OPENSSL_free(gctx);
 576 }
 577
 578 /* For any RSA key, we use the "RSA" algorithms regardless of sub-type. */
 579 static const char *rsapss_query_operation_name(int operation_id)
 580 {
 581     return "RSA";
 582 }
 583
 584 const OSSL_DISPATCH rsa_keymgmt_functions[] = {
 585     { OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))rsa_newdata },
 586     { OSSL_FUNC_KEYMGMT_GEN_INIT, (void (*)(void))rsa_gen_init },
 587     { OSSL_FUNC_KEYMGMT_GEN_SET_PARAMS,
 588       (void (*)(void))rsa_gen_set_params },
 589     { OSSL_FUNC_KEYMGMT_GEN_SETTABLE_PARAMS,
 590       (void (*)(void))rsa_gen_settable_params },
 591     { OSSL_FUNC_KEYMGMT_GEN, (void (*)(void))rsa_gen },
 592     { OSSL_FUNC_KEYMGMT_GEN_CLEANUP, (void (*)(void))rsa_gen_cleanup },
 593     { OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))rsa_freedata },
 594     { OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*) (void))rsa_get_params },
 595     { OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*) (void))rsa_gettable_params },
 596     { OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))rsa_has },
 597     { OSSL_FUNC_KEYMGMT_MATCH, (void (*)(void))rsa_match },
 598     { OSSL_FUNC_KEYMGMT_VALIDATE, (void (*)(void))rsa_validate },
 599     { OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))rsa_import },
 600     { OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))rsa_import_types },
 601     { OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))rsa_export },
 602     { OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))rsa_export_types },
 603     { 0, NULL }
 604 };
 605
 606 const OSSL_DISPATCH rsapss_keymgmt_functions[] = {
 607     { OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))rsapss_newdata },
 608     { OSSL_FUNC_KEYMGMT_GEN_INIT, (void (*)(void))rsapss_gen_init },
 609     { OSSL_FUNC_KEYMGMT_GEN_SET_PARAMS, (void (*)(void))rsa_gen_set_params },
 610     { OSSL_FUNC_KEYMGMT_GEN_SETTABLE_PARAMS,
 611       (void (*)(void))rsapss_gen_settable_params },
 612     { OSSL_FUNC_KEYMGMT_GEN, (void (*)(void))rsa_gen },
 613     { OSSL_FUNC_KEYMGMT_GEN_CLEANUP, (void (*)(void))rsa_gen_cleanup },
 614     { OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))rsa_freedata },
 615     { OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*) (void))rsa_get_params },
 616     { OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*) (void))rsa_gettable_params },
 617     { OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))rsa_has },
 618     { OSSL_FUNC_KEYMGMT_VALIDATE, (void (*)(void))rsa_validate },
 619     { OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))rsa_import },
 620     { OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))rsa_import_types },
 621     { OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))rsa_export },
 622     { OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))rsa_export_types },
 623     { OSSL_FUNC_KEYMGMT_QUERY_OPERATION_NAME,
 624       (void (*)(void))rsapss_query_operation_name },
 625     { 0, NULL }
 626 };