providers/implementations/keymgmt/mac_legacy_kmgmt.c

   1 /*
   2  * Copyright 2020-2021 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 /* We need to use some engine deprecated APIs */
  11 #define OPENSSL_SUPPRESS_DEPRECATED
  12
  13 #include <string.h>
  14 #include <openssl/core_dispatch.h>
  15 #include <openssl/core_names.h>
  16 #include <openssl/params.h>
  17 #include <openssl/err.h>
  18 #include <openssl/evp.h>
  19 #include <openssl/proverr.h>
  20 #include "openssl/param_build.h"
  21 #include "internal/param_build_set.h"
  22 #include "prov/implementations.h"
  23 #include "prov/providercommon.h"
  24 #include "prov/provider_ctx.h"
  25 #include "prov/macsignature.h"
  26 #include "e_os.h" /* strcasecmp */
  27
  28 static OSSL_FUNC_keymgmt_new_fn mac_new;
  29 static OSSL_FUNC_keymgmt_free_fn mac_free;
  30 static OSSL_FUNC_keymgmt_gen_init_fn mac_gen_init;
  31 static OSSL_FUNC_keymgmt_gen_fn mac_gen;
  32 static OSSL_FUNC_keymgmt_gen_cleanup_fn mac_gen_cleanup;
  33 static OSSL_FUNC_keymgmt_gen_set_params_fn mac_gen_set_params;
  34 static OSSL_FUNC_keymgmt_gen_settable_params_fn mac_gen_settable_params;
  35 static OSSL_FUNC_keymgmt_get_params_fn mac_get_params;
  36 static OSSL_FUNC_keymgmt_gettable_params_fn mac_gettable_params;
  37 static OSSL_FUNC_keymgmt_set_params_fn mac_set_params;
  38 static OSSL_FUNC_keymgmt_settable_params_fn mac_settable_params;
  39 static OSSL_FUNC_keymgmt_has_fn mac_has;
  40 static OSSL_FUNC_keymgmt_match_fn mac_match;
  41 static OSSL_FUNC_keymgmt_import_fn mac_import;
  42 static OSSL_FUNC_keymgmt_import_types_fn mac_imexport_types;
  43 static OSSL_FUNC_keymgmt_export_fn mac_export;
  44 static OSSL_FUNC_keymgmt_export_types_fn mac_imexport_types;
  45
  46 static OSSL_FUNC_keymgmt_new_fn mac_new_cmac;
  47 static OSSL_FUNC_keymgmt_gettable_params_fn cmac_gettable_params;
  48 static OSSL_FUNC_keymgmt_import_types_fn cmac_imexport_types;
  49 static OSSL_FUNC_keymgmt_export_types_fn cmac_imexport_types;
  50 static OSSL_FUNC_keymgmt_gen_set_params_fn cmac_gen_set_params;
  51 static OSSL_FUNC_keymgmt_gen_settable_params_fn cmac_gen_settable_params;
  52
  53 struct mac_gen_ctx {
  54     OSSL_LIB_CTX *libctx;
  55     int selection;
  56     unsigned char *priv_key;
  57     size_t priv_key_len;
  58     PROV_CIPHER cipher;
  59 };
  60
  61 MAC_KEY *ossl_mac_key_new(OSSL_LIB_CTX *libctx, int cmac)
  62 {
  63     MAC_KEY *mackey;
  64
  65     if (!ossl_prov_is_running())
  66         return NULL;
  67
  68     mackey = OPENSSL_zalloc(sizeof(*mackey));
  69     if (mackey == NULL)
  70         return NULL;
  71
  72     mackey->lock = CRYPTO_THREAD_lock_new();
  73     if (mackey->lock == NULL) {
  74         OPENSSL_free(mackey);
  75         return NULL;
  76     }
  77     mackey->libctx = libctx;
  78     mackey->refcnt = 1;
  79     mackey->cmac = cmac;
  80
  81     return mackey;
  82 }
  83
  84 void ossl_mac_key_free(MAC_KEY *mackey)
  85 {
  86     int ref = 0;
  87
  88     if (mackey == NULL)
  89         return;
  90
  91     CRYPTO_DOWN_REF(&mackey->refcnt, &ref, mackey->lock);
  92     if (ref > 0)
  93         return;
  94
  95     OPENSSL_secure_clear_free(mackey->priv_key, mackey->priv_key_len);
  96     OPENSSL_free(mackey->properties);
  97     ossl_prov_cipher_reset(&mackey->cipher);
  98     CRYPTO_THREAD_lock_free(mackey->lock);
  99     OPENSSL_free(mackey);
 100 }
 101
 102 int ossl_mac_key_up_ref(MAC_KEY *mackey)
 103 {
 104     int ref = 0;
 105
 106     /* This is effectively doing a new operation on the MAC_KEY and should be
 107      * adequately guarded again modules' error states.  However, both current
 108      * calls here are guarded propery in signature/mac_legacy.c.  Thus, it
 109      * could be removed here.  The concern is that something in the future
 110      * might call this function without adequate guards.  It's a cheap call,
 111      * it seems best to leave it even though it is currently redundant.
 112      */
 113     if (!ossl_prov_is_running())
 114         return 0;
 115
 116     CRYPTO_UP_REF(&mackey->refcnt, &ref, mackey->lock);
 117     return 1;
 118 }
 119
 120 static void *mac_new(void *provctx)
 121 {
 122     return ossl_mac_key_new(PROV_LIBCTX_OF(provctx), 0);
 123 }
 124
 125 static void *mac_new_cmac(void *provctx)
 126 {
 127     return ossl_mac_key_new(PROV_LIBCTX_OF(provctx), 1);
 128 }
 129
 130 static void mac_free(void *mackey)
 131 {
 132     ossl_mac_key_free(mackey);
 133 }
 134
 135 static int mac_has(const void *keydata, int selection)
 136 {
 137     const MAC_KEY *key = keydata;
 138     int ok = 0;
 139
 140     if (ossl_prov_is_running() && key != NULL) {
 141         /*
 142          * MAC keys always have all the parameters they need (i.e. none).
 143          * Therefore we always return with 1, if asked about parameters.
 144          * Similarly for public keys.
 145          */
 146         ok = 1;
 147
 148         if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
 149             ok = key->priv_key != NULL;
 150     }
 151     return ok;
 152 }
 153
 154 static int mac_match(const void *keydata1, const void *keydata2, int selection)
 155 {
 156     const MAC_KEY *key1 = keydata1;
 157     const MAC_KEY *key2 = keydata2;
 158     int ok = 1;
 159
 160     if (!ossl_prov_is_running())
 161         return 0;
 162
 163     if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) {
 164         if ((key1->priv_key == NULL && key2->priv_key != NULL)
 165                 || (key1->priv_key != NULL && key2->priv_key == NULL)
 166                 || key1->priv_key_len != key2->priv_key_len
 167                 || (key1->cipher.cipher == NULL && key2->cipher.cipher != NULL)
 168                 || (key1->cipher.cipher != NULL && key2->cipher.cipher == NULL))
 169             ok = 0;
 170         else
 171             ok = ok && (key1->priv_key == NULL /* implies key2->privkey == NULL */
 172                         || CRYPTO_memcmp(key1->priv_key, key2->priv_key,
 173                                          key1->priv_key_len) == 0);
 174         if (key1->cipher.cipher != NULL)
 175             ok = ok && EVP_CIPHER_is_a(key1->cipher.cipher,
 176                                        EVP_CIPHER_name(key2->cipher.cipher));
 177     }
 178     return ok;
 179 }
 180
 181 static int mac_key_fromdata(MAC_KEY *key, const OSSL_PARAM params[])
 182 {
 183     const OSSL_PARAM *p;
 184
 185     p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PRIV_KEY);
 186     if (p != NULL) {
 187         if (p->data_type != OSSL_PARAM_OCTET_STRING) {
 188             ERR_raise(ERR_LIB_PROV, ERR_R_PASSED_INVALID_ARGUMENT);
 189             return 0;
 190         }
 191         OPENSSL_secure_clear_free(key->priv_key, key->priv_key_len);
 192         key->priv_key = OPENSSL_secure_malloc(p->data_size);
 193         if (key->priv_key == NULL) {
 194             ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
 195             return 0;
 196         }
 197         memcpy(key->priv_key, p->data, p->data_size);
 198         key->priv_key_len = p->data_size;
 199     }
 200
 201     p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PROPERTIES);
 202     if (p != NULL) {
 203         if (p->data_type != OSSL_PARAM_UTF8_STRING) {
 204             ERR_raise(ERR_LIB_PROV, ERR_R_PASSED_INVALID_ARGUMENT);
 205             return 0;
 206         }
 207         OPENSSL_free(key->properties);
 208         key->properties = OPENSSL_strdup(p->data);
 209         if (key->properties == NULL) {
 210             ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
 211             return 0;
 212         }
 213     }
 214
 215     if (key->cmac && !ossl_prov_cipher_load_from_params(&key->cipher, params,
 216                                                         key->libctx)) {
 217         ERR_raise(ERR_LIB_PROV, ERR_R_PASSED_INVALID_ARGUMENT);
 218         return 0;
 219     }
 220
 221     if (key->priv_key != NULL)
 222         return 1;
 223
 224     return 0;
 225 }
 226
 227 static int mac_import(void *keydata, int selection, const OSSL_PARAM params[])
 228 {
 229     MAC_KEY *key = keydata;
 230
 231     if (!ossl_prov_is_running() || key == NULL)
 232         return 0;
 233
 234     if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) == 0)
 235         return 0;
 236
 237     return mac_key_fromdata(key, params);
 238 }
 239
 240 static int key_to_params(MAC_KEY *key, OSSL_PARAM_BLD *tmpl,
 241                          OSSL_PARAM params[])
 242 {
 243     if (key == NULL)
 244         return 0;
 245
 246     if (key->priv_key != NULL
 247         && !ossl_param_build_set_octet_string(tmpl, params,
 248                                               OSSL_PKEY_PARAM_PRIV_KEY,
 249                                               key->priv_key, key->priv_key_len))
 250         return 0;
 251
 252     if (key->cipher.cipher != NULL
 253         && !ossl_param_build_set_utf8_string(tmpl, params,
 254                                              OSSL_PKEY_PARAM_CIPHER,
 255                                              EVP_CIPHER_name(key->cipher.cipher)))
 256         return 0;
 257
 258 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
 259     if (key->cipher.engine != NULL
 260         && !ossl_param_build_set_utf8_string(tmpl, params,
 261                                              OSSL_PKEY_PARAM_ENGINE,
 262                                              ENGINE_get_id(key->cipher.engine)))
 263         return 0;
 264 #endif
 265
 266     return 1;
 267 }
 268
 269 static int mac_export(void *keydata, int selection, OSSL_CALLBACK *param_cb,
 270                       void *cbarg)
 271 {
 272     MAC_KEY *key = keydata;
 273     OSSL_PARAM_BLD *tmpl;
 274     OSSL_PARAM *params = NULL;
 275     int ret = 0;
 276
 277     if (!ossl_prov_is_running() || key == NULL)
 278         return 0;
 279
 280     tmpl = OSSL_PARAM_BLD_new();
 281     if (tmpl == NULL)
 282         return 0;
 283
 284     if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0
 285          && !key_to_params(key, tmpl, NULL))
 286         goto err;
 287
 288     params = OSSL_PARAM_BLD_to_param(tmpl);
 289     if (params == NULL)
 290         goto err;
 291
 292     ret = param_cb(params, cbarg);
 293     OSSL_PARAM_BLD_free_params(params);
 294 err:
 295     OSSL_PARAM_BLD_free(tmpl);
 296     return ret;
 297 }
 298
 299 static const OSSL_PARAM mac_key_types[] = {
 300     OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_PRIV_KEY, NULL, 0),
 301     OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_PROPERTIES, NULL, 0),
 302     OSSL_PARAM_END
 303 };
 304 static const OSSL_PARAM *mac_imexport_types(int selection)
 305 {
 306     if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
 307         return mac_key_types;
 308     return NULL;
 309 }
 310
 311 static const OSSL_PARAM cmac_key_types[] = {
 312     OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_PRIV_KEY, NULL, 0),
 313     OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_CIPHER, NULL, 0),
 314     OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_ENGINE, NULL, 0),
 315     OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_PROPERTIES, NULL, 0),
 316     OSSL_PARAM_END
 317 };
 318 static const OSSL_PARAM *cmac_imexport_types(int selection)
 319 {
 320     if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
 321         return cmac_key_types;
 322     return NULL;
 323 }
 324
 325 static int mac_get_params(void *key, OSSL_PARAM params[])
 326 {
 327     return key_to_params(key, NULL, params);
 328 }
 329
 330 static const OSSL_PARAM *mac_gettable_params(void *provctx)
 331 {
 332     static const OSSL_PARAM gettable_params[] = {
 333         OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_PRIV_KEY, NULL, 0),
 334         OSSL_PARAM_END
 335     };
 336     return gettable_params;
 337 }
 338
 339 static const OSSL_PARAM *cmac_gettable_params(void *provctx)
 340 {
 341     static const OSSL_PARAM gettable_params[] = {
 342         OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_PRIV_KEY, NULL, 0),
 343         OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_CIPHER, NULL, 0),
 344         OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_ENGINE, NULL, 0),
 345         OSSL_PARAM_END
 346     };
 347     return gettable_params;
 348 }
 349
 350 static int mac_set_params(void *keydata, const OSSL_PARAM params[])
 351 {
 352     MAC_KEY *key = keydata;
 353     const OSSL_PARAM *p;
 354
 355     if (key == NULL)
 356         return 0;
 357
 358     p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PRIV_KEY);
 359     if (p != NULL)
 360         return mac_key_fromdata(key, params);
 361
 362     return 1;
 363 }
 364
 365 static const OSSL_PARAM *mac_settable_params(void *provctx)
 366 {
 367     static const OSSL_PARAM settable_params[] = {
 368         OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_PRIV_KEY, NULL, 0),
 369         OSSL_PARAM_END
 370     };
 371     return settable_params;
 372 }
 373
 374 static void *mac_gen_init(void *provctx, int selection)
 375 {
 376     OSSL_LIB_CTX *libctx = PROV_LIBCTX_OF(provctx);
 377     struct mac_gen_ctx *gctx = NULL;
 378
 379     if (!ossl_prov_is_running())
 380         return NULL;
 381
 382     if ((gctx = OPENSSL_zalloc(sizeof(*gctx))) != NULL) {
 383         gctx->libctx = libctx;
 384         gctx->selection = selection;
 385     }
 386     return gctx;
 387 }
 388
 389 static int mac_gen_set_params(void *genctx, const OSSL_PARAM params[])
 390 {
 391     struct mac_gen_ctx *gctx = genctx;
 392     const OSSL_PARAM *p;
 393
 394     if (gctx == NULL)
 395         return 0;
 396
 397     p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PRIV_KEY);
 398     if (p != NULL) {
 399         if (p->data_type != OSSL_PARAM_OCTET_STRING) {
 400             ERR_raise(ERR_LIB_PROV, ERR_R_PASSED_INVALID_ARGUMENT);
 401             return 0;
 402         }
 403         gctx->priv_key = OPENSSL_secure_malloc(p->data_size);
 404         if (gctx->priv_key == NULL) {
 405             ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
 406             return 0;
 407         }
 408         memcpy(gctx->priv_key, p->data, p->data_size);
 409         gctx->priv_key_len = p->data_size;
 410     }
 411
 412     return 1;
 413 }
 414
 415 static int cmac_gen_set_params(void *genctx, const OSSL_PARAM params[])
 416 {
 417     struct mac_gen_ctx *gctx = genctx;
 418
 419     if (!mac_gen_set_params(genctx, params))
 420         return 0;
 421
 422     if (!ossl_prov_cipher_load_from_params(&gctx->cipher, params,
 423                                            gctx->libctx)) {
 424         ERR_raise(ERR_LIB_PROV, ERR_R_PASSED_INVALID_ARGUMENT);
 425         return 0;
 426     }
 427
 428     return 1;
 429 }
 430
 431 static const OSSL_PARAM *mac_gen_settable_params(void *provctx)
 432 {
 433     static OSSL_PARAM settable[] = {
 434         OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_PRIV_KEY, NULL, 0),
 435         OSSL_PARAM_END
 436     };
 437     return settable;
 438 }
 439
 440 static const OSSL_PARAM *cmac_gen_settable_params(void *provctx)
 441 {
 442     static OSSL_PARAM settable[] = {
 443         OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_PRIV_KEY, NULL, 0),
 444         OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_CIPHER, NULL, 0),
 445         OSSL_PARAM_END
 446     };
 447     return settable;
 448 }
 449
 450 static void *mac_gen(void *genctx, OSSL_CALLBACK *cb, void *cbarg)
 451 {
 452     struct mac_gen_ctx *gctx = genctx;
 453     MAC_KEY *key;
 454
 455     if (!ossl_prov_is_running() || gctx == NULL)
 456         return NULL;
 457
 458     if ((key = ossl_mac_key_new(gctx->libctx, 0)) == NULL) {
 459         ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
 460         return NULL;
 461     }
 462
 463     /* If we're doing parameter generation then we just return a blank key */
 464     if ((gctx->selection & OSSL_KEYMGMT_SELECT_KEYPAIR) == 0)
 465         return key;
 466
 467     if (gctx->priv_key == NULL) {
 468         ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY);
 469         ossl_mac_key_free(key);
 470         return NULL;
 471     }
 472
 473     /*
 474      * This is horrible but required for backwards compatibility. We don't
 475      * actually do real key generation at all. We simply copy the key that was
 476      * previously set in the gctx. Hopefully at some point in the future all
 477      * of this can be removed and we will only support the EVP_KDF APIs.
 478      */
 479     if (!ossl_prov_cipher_copy(&key->cipher, &gctx->cipher)) {
 480         ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
 481         return NULL;
 482     }
 483     ossl_prov_cipher_reset(&gctx->cipher);
 484     key->priv_key = gctx->priv_key;
 485     key->priv_key_len = gctx->priv_key_len;
 486     gctx->priv_key_len = 0;
 487     gctx->priv_key = NULL;
 488
 489     return key;
 490 }
 491
 492 static void mac_gen_cleanup(void *genctx)
 493 {
 494     struct mac_gen_ctx *gctx = genctx;
 495
 496     OPENSSL_secure_clear_free(gctx->priv_key, gctx->priv_key_len);
 497     ossl_prov_cipher_reset(&gctx->cipher);
 498     OPENSSL_free(gctx);
 499 }
 500
 501 const OSSL_DISPATCH ossl_mac_legacy_keymgmt_functions[] = {
 502     { OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))mac_new },
 503     { OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))mac_free },
 504     { OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*) (void))mac_get_params },
 505     { OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*) (void))mac_gettable_params },
 506     { OSSL_FUNC_KEYMGMT_SET_PARAMS, (void (*) (void))mac_set_params },
 507     { OSSL_FUNC_KEYMGMT_SETTABLE_PARAMS, (void (*) (void))mac_settable_params },
 508     { OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))mac_has },
 509     { OSSL_FUNC_KEYMGMT_MATCH, (void (*)(void))mac_match },
 510     { OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))mac_import },
 511     { OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))mac_imexport_types },
 512     { OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))mac_export },
 513     { OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))mac_imexport_types },
 514     { OSSL_FUNC_KEYMGMT_GEN_INIT, (void (*)(void))mac_gen_init },
 515     { OSSL_FUNC_KEYMGMT_GEN_SET_PARAMS, (void (*)(void))mac_gen_set_params },
 516     { OSSL_FUNC_KEYMGMT_GEN_SETTABLE_PARAMS,
 517         (void (*)(void))mac_gen_settable_params },
 518     { OSSL_FUNC_KEYMGMT_GEN, (void (*)(void))mac_gen },
 519     { OSSL_FUNC_KEYMGMT_GEN_CLEANUP, (void (*)(void))mac_gen_cleanup },
 520     { 0, NULL }
 521 };
 522
 523 const OSSL_DISPATCH ossl_cossl_mac_legacy_keymgmt_functions[] = {
 524     { OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))mac_new_cmac },
 525     { OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))mac_free },
 526     { OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*) (void))mac_get_params },
 527     { OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*) (void))cmac_gettable_params },
 528     { OSSL_FUNC_KEYMGMT_SET_PARAMS, (void (*) (void))mac_set_params },
 529     { OSSL_FUNC_KEYMGMT_SETTABLE_PARAMS, (void (*) (void))mac_settable_params },
 530     { OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))mac_has },
 531     { OSSL_FUNC_KEYMGMT_MATCH, (void (*)(void))mac_match },
 532     { OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))mac_import },
 533     { OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))cmac_imexport_types },
 534     { OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))mac_export },
 535     { OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))cmac_imexport_types },
 536     { OSSL_FUNC_KEYMGMT_GEN_INIT, (void (*)(void))mac_gen_init },
 537     { OSSL_FUNC_KEYMGMT_GEN_SET_PARAMS, (void (*)(void))cmac_gen_set_params },
 538     { OSSL_FUNC_KEYMGMT_GEN_SETTABLE_PARAMS,
 539         (void (*)(void))cmac_gen_settable_params },
 540     { OSSL_FUNC_KEYMGMT_GEN, (void (*)(void))mac_gen },
 541     { OSSL_FUNC_KEYMGMT_GEN_CLEANUP, (void (*)(void))mac_gen_cleanup },
 542     { 0, NULL }
 543 };
 544