providers/implementations/keymgmt/rsa_kmgmt.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/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 "crypto/cryptlib.h"
  27 #include "internal/param_build_set.h"
  28
  29 static OSSL_FUNC_keymgmt_new_fn rsa_newdata;
  30 static OSSL_FUNC_keymgmt_new_fn rsapss_newdata;
  31 static OSSL_FUNC_keymgmt_gen_init_fn rsa_gen_init;
  32 static OSSL_FUNC_keymgmt_gen_init_fn rsapss_gen_init;
  33 static OSSL_FUNC_keymgmt_gen_set_params_fn rsa_gen_set_params;
  34 static OSSL_FUNC_keymgmt_gen_settable_params_fn rsa_gen_settable_params;
  35 static OSSL_FUNC_keymgmt_gen_settable_params_fn rsapss_gen_settable_params;
  36 static OSSL_FUNC_keymgmt_gen_fn rsa_gen;
  37 static OSSL_FUNC_keymgmt_gen_cleanup_fn rsa_gen_cleanup;
  38 static OSSL_FUNC_keymgmt_load_fn rsa_load;
  39 static OSSL_FUNC_keymgmt_free_fn rsa_freedata;
  40 static OSSL_FUNC_keymgmt_get_params_fn rsa_get_params;
  41 static OSSL_FUNC_keymgmt_gettable_params_fn rsa_gettable_params;
  42 static OSSL_FUNC_keymgmt_has_fn rsa_has;
  43 static OSSL_FUNC_keymgmt_match_fn rsa_match;
  44 static OSSL_FUNC_keymgmt_validate_fn rsa_validate;
  45 static OSSL_FUNC_keymgmt_import_fn rsa_import;
  46 static OSSL_FUNC_keymgmt_import_types_fn rsa_import_types;
  47 static OSSL_FUNC_keymgmt_export_fn rsa_export;
  48 static OSSL_FUNC_keymgmt_export_types_fn rsa_export_types;
  49 static OSSL_FUNC_keymgmt_query_operation_name_fn rsa_query_operation_name;
  50
  51 #define RSA_DEFAULT_MD "SHA256"
  52 #define RSA_PSS_DEFAULT_MD OSSL_DIGEST_NAME_SHA1
  53 #define RSA_POSSIBLE_SELECTIONS                                        \
  54     (OSSL_KEYMGMT_SELECT_KEYPAIR | OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS)
  55
  56 DEFINE_STACK_OF(BIGNUM)
  57 DEFINE_SPECIAL_STACK_OF_CONST(BIGNUM_const, BIGNUM)
  58
  59 static int pss_params_fromdata(RSA_PSS_PARAMS_30 *pss_params, int *defaults_set,
  60                                const OSSL_PARAM params[], int rsa_type,
  61                                OSSL_LIB_CTX *libctx)
  62 {
  63     if (!ossl_rsa_pss_params_30_fromdata(pss_params, defaults_set,
  64                                          params, libctx))
  65         return 0;
  66
  67     /* If not a PSS type RSA, sending us PSS parameters is wrong */
  68     if (rsa_type != RSA_FLAG_TYPE_RSASSAPSS
  69         && !ossl_rsa_pss_params_30_is_unrestricted(pss_params))
  70         return 0;
  71
  72     return 1;
  73 }
  74
  75 static void *rsa_newdata(void *provctx)
  76 {
  77     OSSL_LIB_CTX *libctx = PROV_LIBCTX_OF(provctx);
  78     RSA *rsa;
  79
  80     if (!ossl_prov_is_running())
  81         return NULL;
  82
  83     rsa = ossl_rsa_new_with_ctx(libctx);
  84     if (rsa != NULL) {
  85         RSA_clear_flags(rsa, RSA_FLAG_TYPE_MASK);
  86         RSA_set_flags(rsa, RSA_FLAG_TYPE_RSA);
  87     }
  88     return rsa;
  89 }
  90
  91 static void *rsapss_newdata(void *provctx)
  92 {
  93     OSSL_LIB_CTX *libctx = PROV_LIBCTX_OF(provctx);
  94     RSA *rsa;
  95
  96     if (!ossl_prov_is_running())
  97         return NULL;
  98
  99     rsa = ossl_rsa_new_with_ctx(libctx);
 100     if (rsa != NULL) {
 101         RSA_clear_flags(rsa, RSA_FLAG_TYPE_MASK);
 102         RSA_set_flags(rsa, RSA_FLAG_TYPE_RSASSAPSS);
 103     }
 104     return rsa;
 105 }
 106
 107 static void rsa_freedata(void *keydata)
 108 {
 109     RSA_free(keydata);
 110 }
 111
 112 static int rsa_has(const void *keydata, int selection)
 113 {
 114     const RSA *rsa = keydata;
 115     int ok = 1;
 116
 117     if (rsa == NULL || !ossl_prov_is_running())
 118         return 0;
 119     if ((selection & RSA_POSSIBLE_SELECTIONS) == 0)
 120         return 1; /* the selection is not missing */
 121
 122     if ((selection & OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS) != 0)
 123         /* This will change with OAEP */
 124         ok = ok && (RSA_test_flags(rsa, RSA_FLAG_TYPE_RSASSAPSS) != 0);
 125     if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
 126         ok = ok && (RSA_get0_e(rsa) != NULL);
 127     if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
 128         ok = ok && (RSA_get0_n(rsa) != NULL);
 129     if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
 130         ok = ok && (RSA_get0_d(rsa) != NULL);
 131     return ok;
 132 }
 133
 134 static int rsa_match(const void *keydata1, const void *keydata2, int selection)
 135 {
 136     const RSA *rsa1 = keydata1;
 137     const RSA *rsa2 = keydata2;
 138     int ok = 1;
 139
 140     if (!ossl_prov_is_running())
 141         return 0;
 142
 143     /* There is always an |e| */
 144     ok = ok && BN_cmp(RSA_get0_e(rsa1), RSA_get0_e(rsa2)) == 0;
 145     if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
 146         ok = ok && BN_cmp(RSA_get0_n(rsa1), RSA_get0_n(rsa2)) == 0;
 147     if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
 148         ok = ok && BN_cmp(RSA_get0_d(rsa1), RSA_get0_d(rsa2)) == 0;
 149     return ok;
 150 }
 151
 152 static int rsa_import(void *keydata, int selection, const OSSL_PARAM params[])
 153 {
 154     RSA *rsa = keydata;
 155     int rsa_type;
 156     int ok = 1;
 157     int pss_defaults_set = 0;
 158
 159     if (!ossl_prov_is_running() || rsa == NULL)
 160         return 0;
 161
 162     if ((selection & RSA_POSSIBLE_SELECTIONS) == 0)
 163         return 0;
 164
 165     rsa_type = RSA_test_flags(rsa, RSA_FLAG_TYPE_MASK);
 166
 167     if ((selection & OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS) != 0)
 168         ok = ok && pss_params_fromdata(ossl_rsa_get0_pss_params_30(rsa),
 169                                        &pss_defaults_set,
 170                                        params, rsa_type,
 171                                        ossl_rsa_get0_libctx(rsa));
 172     if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
 173         ok = ok && ossl_rsa_fromdata(rsa, params);
 174
 175     return ok;
 176 }
 177
 178 static int rsa_export(void *keydata, int selection,
 179                       OSSL_CALLBACK *param_callback, void *cbarg)
 180 {
 181     RSA *rsa = keydata;
 182     const RSA_PSS_PARAMS_30 *pss_params = ossl_rsa_get0_pss_params_30(rsa);
 183     OSSL_PARAM_BLD *tmpl;
 184     OSSL_PARAM *params = NULL;
 185     int ok = 1;
 186
 187     if (!ossl_prov_is_running() || rsa == NULL)
 188         return 0;
 189
 190     if ((selection & RSA_POSSIBLE_SELECTIONS) == 0)
 191         return 0;
 192
 193     tmpl = OSSL_PARAM_BLD_new();
 194     if (tmpl == NULL)
 195         return 0;
 196
 197     if ((selection & OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS) != 0)
 198         ok = ok && (ossl_rsa_pss_params_30_is_unrestricted(pss_params)
 199                     || ossl_rsa_pss_params_30_todata(pss_params, tmpl, NULL));
 200     if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
 201         ok = ok && ossl_rsa_todata(rsa, tmpl, NULL);
 202
 203     if (!ok
 204         || (params = OSSL_PARAM_BLD_to_param(tmpl)) == NULL)
 205         goto err;
 206
 207     ok = param_callback(params, cbarg);
 208     OSSL_PARAM_BLD_free_params(params);
 209 err:
 210     OSSL_PARAM_BLD_free(tmpl);
 211     return ok;
 212 }
 213
 214 #ifdef FIPS_MODULE
 215 /* In fips mode there are no multi-primes. */
 216 # define RSA_KEY_MP_TYPES()                                                    \
 217 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR1, NULL, 0),                           \
 218 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR2, NULL, 0),                           \
 219 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT1, NULL, 0),                         \
 220 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT2, NULL, 0),                         \
 221 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT1, NULL, 0),
 222 #else
 223 /*
 224  * We allow up to 10 prime factors (starting with p, q).
 225  * NOTE: there is only 9 OSSL_PKEY_PARAM_RSA_COEFFICIENT
 226  */
 227 # define RSA_KEY_MP_TYPES()                                                    \
 228 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR1, NULL, 0),                           \
 229 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR2, NULL, 0),                           \
 230 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR3, NULL, 0),                           \
 231 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR4, NULL, 0),                           \
 232 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR5, NULL, 0),                           \
 233 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR6, NULL, 0),                           \
 234 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR7, NULL, 0),                           \
 235 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR8, NULL, 0),                           \
 236 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR9, NULL, 0),                           \
 237 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR10, NULL, 0),                          \
 238 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT1, NULL, 0),                         \
 239 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT2, NULL, 0),                         \
 240 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT3, NULL, 0),                         \
 241 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT4, NULL, 0),                         \
 242 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT5, NULL, 0),                         \
 243 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT6, NULL, 0),                         \
 244 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT7, NULL, 0),                         \
 245 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT8, NULL, 0),                         \
 246 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT9, NULL, 0),                         \
 247 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT10, NULL, 0),                        \
 248 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT1, NULL, 0),                      \
 249 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT2, NULL, 0),                      \
 250 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT3, NULL, 0),                      \
 251 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT4, NULL, 0),                      \
 252 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT5, NULL, 0),                      \
 253 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT6, NULL, 0),                      \
 254 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT7, NULL, 0),                      \
 255 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT8, NULL, 0),                      \
 256 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT9, NULL, 0),
 257 #endif
 258
 259 #define RSA_KEY_TYPES()                                                        \
 260 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_N, NULL, 0),                                 \
 261 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_E, NULL, 0),                                 \
 262 OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_D, NULL, 0),                                 \
 263 RSA_KEY_MP_TYPES()
 264
 265 /*
 266  * This provider can export everything in an RSA key, so we use the exact
 267  * same type description for export as for import.  Other providers might
 268  * choose to import full keys, but only export the public parts, and will
 269  * therefore have the importkey_types and importkey_types functions return
 270  * different arrays.
 271  */
 272 static const OSSL_PARAM rsa_key_types[] = {
 273     RSA_KEY_TYPES()
 274     OSSL_PARAM_END
 275 };
 276 /*
 277  * We lied about the amount of factors, exponents and coefficients, the
 278  * export and import functions can really deal with an infinite amount
 279  * of these numbers.  However, RSA keys with too many primes are futile,
 280  * so we at least pretend to have some limits.
 281  */
 282
 283 static const OSSL_PARAM *rsa_imexport_types(int selection)
 284 {
 285     if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
 286         return rsa_key_types;
 287     return NULL;
 288 }
 289
 290 static const OSSL_PARAM *rsa_import_types(int selection)
 291 {
 292     return rsa_imexport_types(selection);
 293 }
 294
 295 static const OSSL_PARAM *rsa_export_types(int selection)
 296 {
 297     return rsa_imexport_types(selection);
 298 }
 299
 300 static int rsa_get_params(void *key, OSSL_PARAM params[])
 301 {
 302     RSA *rsa = key;
 303     const RSA_PSS_PARAMS_30 *pss_params = ossl_rsa_get0_pss_params_30(rsa);
 304     int rsa_type = RSA_test_flags(rsa, RSA_FLAG_TYPE_MASK);
 305     OSSL_PARAM *p;
 306
 307     if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_BITS)) != NULL
 308         && !OSSL_PARAM_set_int(p, RSA_bits(rsa)))
 309         return 0;
 310     if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_SECURITY_BITS)) != NULL
 311         && !OSSL_PARAM_set_int(p, RSA_security_bits(rsa)))
 312         return 0;
 313     if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_MAX_SIZE)) != NULL
 314         && !OSSL_PARAM_set_int(p, RSA_size(rsa)))
 315         return 0;
 316
 317     /*
 318      * For restricted RSA-PSS keys, we ignore the default digest request.
 319      * With RSA-OAEP keys, this may need to be amended.
 320      */
 321     if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_DEFAULT_DIGEST)) != NULL
 322         && (rsa_type != RSA_FLAG_TYPE_RSASSAPSS
 323             || ossl_rsa_pss_params_30_is_unrestricted(pss_params))) {
 324         if (!OSSL_PARAM_set_utf8_string(p, RSA_DEFAULT_MD))
 325             return 0;
 326     }
 327
 328     /*
 329      * For non-RSA-PSS keys, we ignore the mandatory digest request.
 330      * With RSA-OAEP keys, this may need to be amended.
 331      */
 332     if ((p = OSSL_PARAM_locate(params,
 333                                OSSL_PKEY_PARAM_MANDATORY_DIGEST)) != NULL
 334         && rsa_type == RSA_FLAG_TYPE_RSASSAPSS
 335         && !ossl_rsa_pss_params_30_is_unrestricted(pss_params)) {
 336         const char *mdname =
 337             ossl_rsa_oaeppss_nid2name(ossl_rsa_pss_params_30_hashalg(pss_params));
 338
 339         if (mdname == NULL || !OSSL_PARAM_set_utf8_string(p, mdname))
 340             return 0;
 341     }
 342     return (rsa_type != RSA_FLAG_TYPE_RSASSAPSS
 343             || ossl_rsa_pss_params_30_todata(pss_params, NULL, params))
 344         && ossl_rsa_todata(rsa, NULL, params);
 345 }
 346
 347 static const OSSL_PARAM rsa_params[] = {
 348     OSSL_PARAM_int(OSSL_PKEY_PARAM_BITS, NULL),
 349     OSSL_PARAM_int(OSSL_PKEY_PARAM_SECURITY_BITS, NULL),
 350     OSSL_PARAM_int(OSSL_PKEY_PARAM_MAX_SIZE, NULL),
 351     OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_DEFAULT_DIGEST, NULL, 0),
 352     RSA_KEY_TYPES()
 353     OSSL_PARAM_END
 354 };
 355
 356 static const OSSL_PARAM *rsa_gettable_params(void *provctx)
 357 {
 358     return rsa_params;
 359 }
 360
 361 static int rsa_validate(const void *keydata, int selection, int checktype)
 362 {
 363     const RSA *rsa = keydata;
 364     int ok = 1;
 365
 366     if (!ossl_prov_is_running())
 367         return 0;
 368
 369     if ((selection & RSA_POSSIBLE_SELECTIONS) == 0)
 370         return 1; /* nothing to validate */
 371
 372     /* If the whole key is selected, we do a pairwise validation */
 373     if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR)
 374         == OSSL_KEYMGMT_SELECT_KEYPAIR) {
 375         ok = ok && ossl_rsa_validate_pairwise(rsa);
 376     } else {
 377         if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
 378             ok = ok && ossl_rsa_validate_private(rsa);
 379         if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
 380             ok = ok && ossl_rsa_validate_public(rsa);
 381     }
 382     return ok;
 383 }
 384
 385 struct rsa_gen_ctx {
 386     OSSL_LIB_CTX *libctx;
 387     const char *propq;
 388
 389     int rsa_type;
 390
 391     size_t nbits;
 392     BIGNUM *pub_exp;
 393     size_t primes;
 394
 395     /* For PSS */
 396     RSA_PSS_PARAMS_30 pss_params;
 397     int pss_defaults_set;
 398
 399     /* For generation callback */
 400     OSSL_CALLBACK *cb;
 401     void *cbarg;
 402
 403 #if defined(FIPS_MODULE) && !defined(OPENSSL_NO_ACVP_TESTS)
 404     /* ACVP test parameters */
 405     OSSL_PARAM *acvp_test_params;
 406 #endif
 407 };
 408
 409 static int rsa_gencb(int p, int n, BN_GENCB *cb)
 410 {
 411     struct rsa_gen_ctx *gctx = BN_GENCB_get_arg(cb);
 412     OSSL_PARAM params[] = { OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END };
 413
 414     params[0] = OSSL_PARAM_construct_int(OSSL_GEN_PARAM_POTENTIAL, &p);
 415     params[1] = OSSL_PARAM_construct_int(OSSL_GEN_PARAM_ITERATION, &n);
 416     return gctx->cb(params, gctx->cbarg);
 417 }
 418
 419 static void *gen_init(void *provctx, int selection, int rsa_type,
 420                       const OSSL_PARAM params[])
 421 {
 422     OSSL_LIB_CTX *libctx = PROV_LIBCTX_OF(provctx);
 423     struct rsa_gen_ctx *gctx = NULL;
 424
 425     if (!ossl_prov_is_running())
 426         return NULL;
 427
 428     if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) == 0)
 429         return NULL;
 430
 431     if ((gctx = OPENSSL_zalloc(sizeof(*gctx))) != NULL) {
 432         gctx->libctx = libctx;
 433         if ((gctx->pub_exp = BN_new()) == NULL
 434             || !BN_set_word(gctx->pub_exp, RSA_F4)) {
 435             BN_free(gctx->pub_exp);
 436             OPENSSL_free(gctx);
 437             gctx = NULL;
 438         } else {
 439             gctx->nbits = 2048;
 440             gctx->primes = RSA_DEFAULT_PRIME_NUM;
 441             gctx->rsa_type = rsa_type;
 442         }
 443     }
 444     if (!rsa_gen_set_params(gctx, params)) {
 445         OPENSSL_free(gctx);
 446         gctx = NULL;
 447     }
 448     return gctx;
 449 }
 450
 451 static void *rsa_gen_init(void *provctx, int selection,
 452                           const OSSL_PARAM params[])
 453 {
 454     return gen_init(provctx, selection, RSA_FLAG_TYPE_RSA, params);
 455 }
 456
 457 static void *rsapss_gen_init(void *provctx, int selection,
 458                              const OSSL_PARAM params[])
 459 {
 460     return gen_init(provctx, selection, RSA_FLAG_TYPE_RSASSAPSS, params);
 461 }
 462
 463 /*
 464  * This function is common for all RSA sub-types, to detect possible
 465  * misuse, such as PSS parameters being passed when a plain RSA key
 466  * is generated.
 467  */
 468 static int rsa_gen_set_params(void *genctx, const OSSL_PARAM params[])
 469 {
 470     struct rsa_gen_ctx *gctx = genctx;
 471     const OSSL_PARAM *p;
 472
 473     if (params == NULL)
 474         return 1;
 475
 476     if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_RSA_BITS)) != NULL
 477         && !OSSL_PARAM_get_size_t(p, &gctx->nbits))
 478         return 0;
 479     if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_RSA_PRIMES)) != NULL
 480         && !OSSL_PARAM_get_size_t(p, &gctx->primes))
 481         return 0;
 482     if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_RSA_E)) != NULL
 483         && !OSSL_PARAM_get_BN(p, &gctx->pub_exp))
 484         return 0;
 485     /* Only attempt to get PSS parameters when generating an RSA-PSS key */
 486     if (gctx->rsa_type == RSA_FLAG_TYPE_RSASSAPSS
 487         && !pss_params_fromdata(&gctx->pss_params, &gctx->pss_defaults_set, params,
 488                                 gctx->rsa_type, gctx->libctx))
 489         return 0;
 490 #if defined(FIPS_MODULE) && !defined(OPENSSL_NO_ACVP_TESTS)
 491     /* Any ACVP test related parameters are copied into a params[] */
 492     if (!rsa_acvp_test_gen_params_new(&gctx->acvp_test_params, params))
 493         return 0;
 494 #endif
 495     return 1;
 496 }
 497
 498 #define rsa_gen_basic                                           \
 499     OSSL_PARAM_size_t(OSSL_PKEY_PARAM_RSA_BITS, NULL),          \
 500     OSSL_PARAM_size_t(OSSL_PKEY_PARAM_RSA_PRIMES, NULL),        \
 501     OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_E, NULL, 0)
 502
 503 /*
 504  * The following must be kept in sync with ossl_rsa_pss_params_30_fromdata()
 505  * in crypto/rsa/rsa_backend.c
 506  */
 507 #define rsa_gen_pss                                                     \
 508     OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_RSA_DIGEST, NULL, 0),        \
 509     OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_RSA_DIGEST_PROPS, NULL, 0),  \
 510     OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_RSA_MASKGENFUNC, NULL, 0),   \
 511     OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_RSA_MGF1_DIGEST, NULL, 0),   \
 512     OSSL_PARAM_int(OSSL_PKEY_PARAM_RSA_PSS_SALTLEN, NULL)
 513
 514 static const OSSL_PARAM *rsa_gen_settable_params(ossl_unused void *genctx,
 515                                                  ossl_unused void *provctx)
 516 {
 517     static OSSL_PARAM settable[] = {
 518         rsa_gen_basic,
 519         OSSL_PARAM_END
 520     };
 521
 522     return settable;
 523 }
 524
 525 static const OSSL_PARAM *rsapss_gen_settable_params(ossl_unused void *genctx,
 526                                                     ossl_unused void *provctx)
 527 {
 528     static OSSL_PARAM settable[] = {
 529         rsa_gen_basic,
 530         rsa_gen_pss,
 531         OSSL_PARAM_END
 532     };
 533
 534     return settable;
 535 }
 536
 537 static void *rsa_gen(void *genctx, OSSL_CALLBACK *osslcb, void *cbarg)
 538 {
 539     struct rsa_gen_ctx *gctx = genctx;
 540     RSA *rsa = NULL, *rsa_tmp = NULL;
 541     BN_GENCB *gencb = NULL;
 542
 543     if (!ossl_prov_is_running() || gctx == NULL)
 544         return NULL;
 545
 546     switch (gctx->rsa_type) {
 547     case RSA_FLAG_TYPE_RSA:
 548         /* For plain RSA keys, PSS parameters must not be set */
 549         if (!ossl_rsa_pss_params_30_is_unrestricted(&gctx->pss_params))
 550             goto err;
 551         break;
 552     case RSA_FLAG_TYPE_RSASSAPSS:
 553         /*
 554          * For plain RSA-PSS keys, PSS parameters may be set but don't have
 555          * to, so not check.
 556          */
 557         break;
 558     default:
 559         /* Unsupported RSA key sub-type... */
 560         return NULL;
 561     }
 562
 563     if ((rsa_tmp = ossl_rsa_new_with_ctx(gctx->libctx)) == NULL)
 564         return NULL;
 565
 566     gctx->cb = osslcb;
 567     gctx->cbarg = cbarg;
 568     gencb = BN_GENCB_new();
 569     if (gencb != NULL)
 570         BN_GENCB_set(gencb, rsa_gencb, genctx);
 571
 572 #if defined(FIPS_MODULE) && !defined(OPENSSL_NO_ACVP_TESTS)
 573     if (gctx->acvp_test_params != NULL) {
 574         if (!rsa_acvp_test_set_params(rsa_tmp, gctx->acvp_test_params))
 575             goto err;
 576     }
 577 #endif
 578
 579     if (!RSA_generate_multi_prime_key(rsa_tmp,
 580                                       (int)gctx->nbits, (int)gctx->primes,
 581                                       gctx->pub_exp, gencb))
 582         goto err;
 583
 584     if (!ossl_rsa_pss_params_30_copy(ossl_rsa_get0_pss_params_30(rsa_tmp),
 585                                      &gctx->pss_params))
 586         goto err;
 587
 588     RSA_clear_flags(rsa_tmp, RSA_FLAG_TYPE_MASK);
 589     RSA_set_flags(rsa_tmp, gctx->rsa_type);
 590
 591     rsa = rsa_tmp;
 592     rsa_tmp = NULL;
 593  err:
 594     BN_GENCB_free(gencb);
 595     RSA_free(rsa_tmp);
 596     return rsa;
 597 }
 598
 599 static void rsa_gen_cleanup(void *genctx)
 600 {
 601     struct rsa_gen_ctx *gctx = genctx;
 602
 603     if (gctx == NULL)
 604         return;
 605 #if defined(FIPS_MODULE) && !defined(OPENSSL_NO_ACVP_TESTS)
 606     rsa_acvp_test_gen_params_free(gctx->acvp_test_params);
 607     gctx->acvp_test_params = NULL;
 608 #endif
 609     BN_clear_free(gctx->pub_exp);
 610     OPENSSL_free(gctx);
 611 }
 612
 613 void *rsa_load(const void *reference, size_t reference_sz)
 614 {
 615     RSA *rsa = NULL;
 616
 617     if (ossl_prov_is_running() && reference_sz == sizeof(rsa)) {
 618         /* The contents of the reference is the address to our object */
 619         rsa = *(RSA **)reference;
 620         /* We grabbed, so we detach it */
 621         *(RSA **)reference = NULL;
 622         return rsa;
 623     }
 624     return NULL;
 625 }
 626
 627 /* For any RSA key, we use the "RSA" algorithms regardless of sub-type. */
 628 static const char *rsa_query_operation_name(int operation_id)
 629 {
 630     return "RSA";
 631 }
 632
 633 const OSSL_DISPATCH ossl_rsa_keymgmt_functions[] = {
 634     { OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))rsa_newdata },
 635     { OSSL_FUNC_KEYMGMT_GEN_INIT, (void (*)(void))rsa_gen_init },
 636     { OSSL_FUNC_KEYMGMT_GEN_SET_PARAMS,
 637       (void (*)(void))rsa_gen_set_params },
 638     { OSSL_FUNC_KEYMGMT_GEN_SETTABLE_PARAMS,
 639       (void (*)(void))rsa_gen_settable_params },
 640     { OSSL_FUNC_KEYMGMT_GEN, (void (*)(void))rsa_gen },
 641     { OSSL_FUNC_KEYMGMT_GEN_CLEANUP, (void (*)(void))rsa_gen_cleanup },
 642     { OSSL_FUNC_KEYMGMT_LOAD, (void (*)(void))rsa_load },
 643     { OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))rsa_freedata },
 644     { OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*) (void))rsa_get_params },
 645     { OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*) (void))rsa_gettable_params },
 646     { OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))rsa_has },
 647     { OSSL_FUNC_KEYMGMT_MATCH, (void (*)(void))rsa_match },
 648     { OSSL_FUNC_KEYMGMT_VALIDATE, (void (*)(void))rsa_validate },
 649     { OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))rsa_import },
 650     { OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))rsa_import_types },
 651     { OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))rsa_export },
 652     { OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))rsa_export_types },
 653     { 0, NULL }
 654 };
 655
 656 const OSSL_DISPATCH ossl_rsapss_keymgmt_functions[] = {
 657     { OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))rsapss_newdata },
 658     { OSSL_FUNC_KEYMGMT_GEN_INIT, (void (*)(void))rsapss_gen_init },
 659     { OSSL_FUNC_KEYMGMT_GEN_SET_PARAMS, (void (*)(void))rsa_gen_set_params },
 660     { OSSL_FUNC_KEYMGMT_GEN_SETTABLE_PARAMS,
 661       (void (*)(void))rsapss_gen_settable_params },
 662     { OSSL_FUNC_KEYMGMT_GEN, (void (*)(void))rsa_gen },
 663     { OSSL_FUNC_KEYMGMT_GEN_CLEANUP, (void (*)(void))rsa_gen_cleanup },
 664     { OSSL_FUNC_KEYMGMT_LOAD, (void (*)(void))rsa_load },
 665     { OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))rsa_freedata },
 666     { OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*) (void))rsa_get_params },
 667     { OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*) (void))rsa_gettable_params },
 668     { OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))rsa_has },
 669     { OSSL_FUNC_KEYMGMT_MATCH, (void (*)(void))rsa_match },
 670     { OSSL_FUNC_KEYMGMT_VALIDATE, (void (*)(void))rsa_validate },
 671     { OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))rsa_import },
 672     { OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))rsa_import_types },
 673     { OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))rsa_export },
 674     { OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))rsa_export_types },
 675     { OSSL_FUNC_KEYMGMT_QUERY_OPERATION_NAME,
 676       (void (*)(void))rsa_query_operation_name },
 677     { 0, NULL }
 678 };