providers/implementations/keymgmt/mac_legacy_kmgmt.c

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