kmac_prov.c revision 1.1.1.1
1/* 2 * Copyright 2018-2021 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 * See SP800-185 "Appendix A - KMAC, .... in Terms of Keccak[c]" 12 * 13 * Inputs are: 14 * K = Key (len(K) < 2^2040 bits) 15 * X = Input 16 * L = Output length (0 <= L < 2^2040 bits) 17 * S = Customization String Default="" (len(S) < 2^2040 bits) 18 * 19 * KMAC128(K, X, L, S) 20 * { 21 * newX = bytepad(encode_string(K), 168) || X || right_encode(L). 22 * T = bytepad(encode_string("KMAC") || encode_string(S), 168). 23 * return KECCAK[256](T || newX || 00, L). 24 * } 25 * 26 * KMAC256(K, X, L, S) 27 * { 28 * newX = bytepad(encode_string(K), 136) || X || right_encode(L). 29 * T = bytepad(encode_string("KMAC") || encode_string(S), 136). 30 * return KECCAK[512](T || newX || 00, L). 31 * } 32 * 33 * KMAC128XOF(K, X, L, S) 34 * { 35 * newX = bytepad(encode_string(K), 168) || X || right_encode(0). 36 * T = bytepad(encode_string("KMAC") || encode_string(S), 168). 37 * return KECCAK[256](T || newX || 00, L). 38 * } 39 * 40 * KMAC256XOF(K, X, L, S) 41 * { 42 * newX = bytepad(encode_string(K), 136) || X || right_encode(0). 43 * T = bytepad(encode_string("KMAC") || encode_string(S), 136). 44 * return KECCAK[512](T || newX || 00, L). 45 * } 46 * 47 */ 48 49#include <stdlib.h> 50#include <string.h> 51#include <openssl/core_dispatch.h> 52#include <openssl/core_names.h> 53#include <openssl/params.h> 54#include <openssl/evp.h> 55#include <openssl/err.h> 56#include <openssl/proverr.h> 57 58#include "prov/implementations.h" 59#include "prov/provider_ctx.h" 60#include "prov/provider_util.h" 61#include "prov/providercommon.h" 62#include "internal/cryptlib.h" /* ossl_assert */ 63 64/* 65 * Forward declaration of everything implemented here. This is not strictly 66 * necessary for the compiler, but provides an assurance that the signatures 67 * of the functions in the dispatch table are correct. 68 */ 69static OSSL_FUNC_mac_newctx_fn kmac128_new; 70static OSSL_FUNC_mac_newctx_fn kmac256_new; 71static OSSL_FUNC_mac_dupctx_fn kmac_dup; 72static OSSL_FUNC_mac_freectx_fn kmac_free; 73static OSSL_FUNC_mac_gettable_ctx_params_fn kmac_gettable_ctx_params; 74static OSSL_FUNC_mac_get_ctx_params_fn kmac_get_ctx_params; 75static OSSL_FUNC_mac_settable_ctx_params_fn kmac_settable_ctx_params; 76static OSSL_FUNC_mac_set_ctx_params_fn kmac_set_ctx_params; 77static OSSL_FUNC_mac_init_fn kmac_init; 78static OSSL_FUNC_mac_update_fn kmac_update; 79static OSSL_FUNC_mac_final_fn kmac_final; 80 81#define KMAC_MAX_BLOCKSIZE ((1600 - 128 * 2) / 8) /* 168 */ 82 83/* 84 * Length encoding will be a 1 byte size + length in bits (3 bytes max) 85 * This gives a range of 0..0XFFFFFF bits = 2097151 bytes). 86 */ 87#define KMAC_MAX_OUTPUT_LEN (0xFFFFFF / 8) 88#define KMAC_MAX_ENCODED_HEADER_LEN (1 + 3) 89 90/* 91 * Restrict the maximum length of the customisation string. This must not 92 * exceed 64 bits = 8k bytes. 93 */ 94#define KMAC_MAX_CUSTOM 512 95 96/* Maximum size of encoded custom string */ 97#define KMAC_MAX_CUSTOM_ENCODED (KMAC_MAX_CUSTOM + KMAC_MAX_ENCODED_HEADER_LEN) 98 99/* Maximum key size in bytes = 512 (4096 bits) */ 100#define KMAC_MAX_KEY 512 101#define KMAC_MIN_KEY 4 102 103/* 104 * Maximum Encoded Key size will be padded to a multiple of the blocksize 105 * i.e KMAC_MAX_KEY + KMAC_MAX_ENCODED_HEADER_LEN = 512 + 4 106 * Padded to a multiple of KMAC_MAX_BLOCKSIZE 107 */ 108#define KMAC_MAX_KEY_ENCODED (KMAC_MAX_BLOCKSIZE * 4) 109 110/* Fixed value of encode_string("KMAC") */ 111static const unsigned char kmac_string[] = { 112 0x01, 0x20, 0x4B, 0x4D, 0x41, 0x43 113}; 114 115#define KMAC_FLAG_XOF_MODE 1 116 117struct kmac_data_st { 118 void *provctx; 119 EVP_MD_CTX *ctx; 120 PROV_DIGEST digest; 121 size_t out_len; 122 size_t key_len; 123 size_t custom_len; 124 /* If xof_mode = 1 then we use right_encode(0) */ 125 int xof_mode; 126 /* key and custom are stored in encoded form */ 127 unsigned char key[KMAC_MAX_KEY_ENCODED]; 128 unsigned char custom[KMAC_MAX_CUSTOM_ENCODED]; 129}; 130 131static int encode_string(unsigned char *out, size_t out_max_len, size_t *out_len, 132 const unsigned char *in, size_t in_len); 133static int right_encode(unsigned char *out, size_t out_max_len, size_t *out_len, 134 size_t bits); 135static int bytepad(unsigned char *out, size_t *out_len, 136 const unsigned char *in1, size_t in1_len, 137 const unsigned char *in2, size_t in2_len, 138 size_t w); 139static int kmac_bytepad_encode_key(unsigned char *out, size_t out_max_len, 140 size_t *out_len, 141 const unsigned char *in, size_t in_len, 142 size_t w); 143 144static void kmac_free(void *vmacctx) 145{ 146 struct kmac_data_st *kctx = vmacctx; 147 148 if (kctx != NULL) { 149 EVP_MD_CTX_free(kctx->ctx); 150 ossl_prov_digest_reset(&kctx->digest); 151 OPENSSL_cleanse(kctx->key, kctx->key_len); 152 OPENSSL_cleanse(kctx->custom, kctx->custom_len); 153 OPENSSL_free(kctx); 154 } 155} 156 157/* 158 * We have KMAC implemented as a hash, which we can use instead of 159 * reimplementing the EVP functionality with direct use of 160 * keccak_mac_init() and friends. 161 */ 162static struct kmac_data_st *kmac_new(void *provctx) 163{ 164 struct kmac_data_st *kctx; 165 166 if (!ossl_prov_is_running()) 167 return NULL; 168 169 if ((kctx = OPENSSL_zalloc(sizeof(*kctx))) == NULL 170 || (kctx->ctx = EVP_MD_CTX_new()) == NULL) { 171 kmac_free(kctx); 172 return NULL; 173 } 174 kctx->provctx = provctx; 175 return kctx; 176} 177 178static void *kmac_fetch_new(void *provctx, const OSSL_PARAM *params) 179{ 180 struct kmac_data_st *kctx = kmac_new(provctx); 181 182 if (kctx == NULL) 183 return 0; 184 if (!ossl_prov_digest_load_from_params(&kctx->digest, params, 185 PROV_LIBCTX_OF(provctx))) { 186 kmac_free(kctx); 187 return 0; 188 } 189 190 kctx->out_len = EVP_MD_get_size(ossl_prov_digest_md(&kctx->digest)); 191 return kctx; 192} 193 194static void *kmac128_new(void *provctx) 195{ 196 static const OSSL_PARAM kmac128_params[] = { 197 OSSL_PARAM_utf8_string("digest", OSSL_DIGEST_NAME_KECCAK_KMAC128, 198 sizeof(OSSL_DIGEST_NAME_KECCAK_KMAC128)), 199 OSSL_PARAM_END 200 }; 201 return kmac_fetch_new(provctx, kmac128_params); 202} 203 204static void *kmac256_new(void *provctx) 205{ 206 static const OSSL_PARAM kmac256_params[] = { 207 OSSL_PARAM_utf8_string("digest", OSSL_DIGEST_NAME_KECCAK_KMAC256, 208 sizeof(OSSL_DIGEST_NAME_KECCAK_KMAC256)), 209 OSSL_PARAM_END 210 }; 211 return kmac_fetch_new(provctx, kmac256_params); 212} 213 214static void *kmac_dup(void *vsrc) 215{ 216 struct kmac_data_st *src = vsrc; 217 struct kmac_data_st *dst; 218 219 if (!ossl_prov_is_running()) 220 return NULL; 221 222 dst = kmac_new(src->provctx); 223 if (dst == NULL) 224 return NULL; 225 226 if (!EVP_MD_CTX_copy(dst->ctx, src->ctx) 227 || !ossl_prov_digest_copy(&dst->digest, &src->digest)) { 228 kmac_free(dst); 229 return NULL; 230 } 231 232 dst->out_len = src->out_len; 233 dst->key_len = src->key_len; 234 dst->custom_len = src->custom_len; 235 dst->xof_mode = src->xof_mode; 236 memcpy(dst->key, src->key, src->key_len); 237 memcpy(dst->custom, src->custom, dst->custom_len); 238 239 return dst; 240} 241 242static int kmac_setkey(struct kmac_data_st *kctx, const unsigned char *key, 243 size_t keylen) 244{ 245 const EVP_MD *digest = ossl_prov_digest_md(&kctx->digest); 246 int w = EVP_MD_get_block_size(digest); 247 248 if (keylen < KMAC_MIN_KEY || keylen > KMAC_MAX_KEY) { 249 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH); 250 return 0; 251 } 252 if (w < 0) { 253 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_DIGEST_LENGTH); 254 return 0; 255 } 256 if (!kmac_bytepad_encode_key(kctx->key, sizeof(kctx->key), &kctx->key_len, 257 key, keylen, (size_t)w)) 258 return 0; 259 return 1; 260} 261 262/* 263 * The init() assumes that any ctrl methods are set beforehand for 264 * md, key and custom. Setting the fields afterwards will have no 265 * effect on the output mac. 266 */ 267static int kmac_init(void *vmacctx, const unsigned char *key, 268 size_t keylen, const OSSL_PARAM params[]) 269{ 270 struct kmac_data_st *kctx = vmacctx; 271 EVP_MD_CTX *ctx = kctx->ctx; 272 unsigned char *out; 273 size_t out_len, block_len; 274 int res, t; 275 276 if (!ossl_prov_is_running() || !kmac_set_ctx_params(kctx, params)) 277 return 0; 278 279 if (key != NULL) { 280 if (!kmac_setkey(kctx, key, keylen)) 281 return 0; 282 } else if (kctx->key_len == 0) { 283 /* Check key has been set */ 284 ERR_raise(ERR_LIB_PROV, PROV_R_NO_KEY_SET); 285 return 0; 286 } 287 if (!EVP_DigestInit_ex(kctx->ctx, ossl_prov_digest_md(&kctx->digest), 288 NULL)) 289 return 0; 290 291 t = EVP_MD_get_block_size(ossl_prov_digest_md(&kctx->digest)); 292 if (t < 0) { 293 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_DIGEST_LENGTH); 294 return 0; 295 } 296 block_len = t; 297 298 /* Set default custom string if it is not already set */ 299 if (kctx->custom_len == 0) { 300 const OSSL_PARAM cparams[] = { 301 OSSL_PARAM_octet_string(OSSL_MAC_PARAM_CUSTOM, "", 0), 302 OSSL_PARAM_END 303 }; 304 (void)kmac_set_ctx_params(kctx, cparams); 305 } 306 307 if (!bytepad(NULL, &out_len, kmac_string, sizeof(kmac_string), 308 kctx->custom, kctx->custom_len, block_len)) { 309 ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR); 310 return 0; 311 } 312 out = OPENSSL_malloc(out_len); 313 if (out == NULL) { 314 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE); 315 return 0; 316 } 317 res = bytepad(out, NULL, kmac_string, sizeof(kmac_string), 318 kctx->custom, kctx->custom_len, block_len) 319 && EVP_DigestUpdate(ctx, out, out_len) 320 && EVP_DigestUpdate(ctx, kctx->key, kctx->key_len); 321 OPENSSL_free(out); 322 return res; 323} 324 325static int kmac_update(void *vmacctx, const unsigned char *data, 326 size_t datalen) 327{ 328 struct kmac_data_st *kctx = vmacctx; 329 330 return EVP_DigestUpdate(kctx->ctx, data, datalen); 331} 332 333static int kmac_final(void *vmacctx, unsigned char *out, size_t *outl, 334 size_t outsize) 335{ 336 struct kmac_data_st *kctx = vmacctx; 337 EVP_MD_CTX *ctx = kctx->ctx; 338 size_t lbits, len; 339 unsigned char encoded_outlen[KMAC_MAX_ENCODED_HEADER_LEN]; 340 int ok; 341 342 if (!ossl_prov_is_running()) 343 return 0; 344 345 /* KMAC XOF mode sets the encoded length to 0 */ 346 lbits = (kctx->xof_mode ? 0 : (kctx->out_len * 8)); 347 348 ok = right_encode(encoded_outlen, sizeof(encoded_outlen), &len, lbits) 349 && EVP_DigestUpdate(ctx, encoded_outlen, len) 350 && EVP_DigestFinalXOF(ctx, out, kctx->out_len); 351 *outl = kctx->out_len; 352 return ok; 353} 354 355static const OSSL_PARAM known_gettable_ctx_params[] = { 356 OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL), 357 OSSL_PARAM_size_t(OSSL_MAC_PARAM_BLOCK_SIZE, NULL), 358 OSSL_PARAM_END 359}; 360static const OSSL_PARAM *kmac_gettable_ctx_params(ossl_unused void *ctx, 361 ossl_unused void *provctx) 362{ 363 return known_gettable_ctx_params; 364} 365 366static int kmac_get_ctx_params(void *vmacctx, OSSL_PARAM params[]) 367{ 368 struct kmac_data_st *kctx = vmacctx; 369 OSSL_PARAM *p; 370 int sz; 371 372 if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_SIZE)) != NULL 373 && !OSSL_PARAM_set_size_t(p, kctx->out_len)) 374 return 0; 375 376 if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_BLOCK_SIZE)) != NULL) { 377 sz = EVP_MD_block_size(ossl_prov_digest_md(&kctx->digest)); 378 if (!OSSL_PARAM_set_int(p, sz)) 379 return 0; 380 } 381 382 return 1; 383} 384 385static const OSSL_PARAM known_settable_ctx_params[] = { 386 OSSL_PARAM_int(OSSL_MAC_PARAM_XOF, NULL), 387 OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL), 388 OSSL_PARAM_octet_string(OSSL_MAC_PARAM_KEY, NULL, 0), 389 OSSL_PARAM_octet_string(OSSL_MAC_PARAM_CUSTOM, NULL, 0), 390 OSSL_PARAM_END 391}; 392static const OSSL_PARAM *kmac_settable_ctx_params(ossl_unused void *ctx, 393 ossl_unused void *provctx) 394{ 395 return known_settable_ctx_params; 396} 397 398/* 399 * The following params can be set any time before final(): 400 * - "outlen" or "size": The requested output length. 401 * - "xof": If set, this indicates that right_encoded(0) 402 * is part of the digested data, otherwise it 403 * uses right_encoded(requested output length). 404 * 405 * All other params should be set before init(). 406 */ 407static int kmac_set_ctx_params(void *vmacctx, const OSSL_PARAM *params) 408{ 409 struct kmac_data_st *kctx = vmacctx; 410 const OSSL_PARAM *p; 411 412 if (params == NULL) 413 return 1; 414 415 if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_XOF)) != NULL 416 && !OSSL_PARAM_get_int(p, &kctx->xof_mode)) 417 return 0; 418 if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_SIZE)) != NULL) { 419 size_t sz = 0; 420 421 if (!OSSL_PARAM_get_size_t(p, &sz)) 422 return 0; 423 if (sz > KMAC_MAX_OUTPUT_LEN) { 424 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_OUTPUT_LENGTH); 425 return 0; 426 } 427 kctx->out_len = sz; 428 } 429 if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_KEY)) != NULL 430 && !kmac_setkey(kctx, p->data, p->data_size)) 431 return 0; 432 if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_CUSTOM)) 433 != NULL) { 434 if (p->data_size > KMAC_MAX_CUSTOM) { 435 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_CUSTOM_LENGTH); 436 return 0; 437 } 438 if (!encode_string(kctx->custom, sizeof(kctx->custom), &kctx->custom_len, 439 p->data, p->data_size)) 440 return 0; 441 } 442 return 1; 443} 444 445/* Encoding/Padding Methods. */ 446 447/* Returns the number of bytes required to store 'bits' into a byte array */ 448static unsigned int get_encode_size(size_t bits) 449{ 450 unsigned int cnt = 0, sz = sizeof(size_t); 451 452 while (bits && (cnt < sz)) { 453 ++cnt; 454 bits >>= 8; 455 } 456 /* If bits is zero 1 byte is required */ 457 if (cnt == 0) 458 cnt = 1; 459 return cnt; 460} 461 462/* 463 * Convert an integer into bytes . The number of bytes is appended 464 * to the end of the buffer. Returns an array of bytes 'out' of size 465 * *out_len. 466 * 467 * e.g if bits = 32, out[2] = { 0x20, 0x01 } 468 */ 469static int right_encode(unsigned char *out, size_t out_max_len, size_t *out_len, 470 size_t bits) 471{ 472 unsigned int len = get_encode_size(bits); 473 int i; 474 475 if (len >= out_max_len) { 476 ERR_raise(ERR_LIB_PROV, PROV_R_LENGTH_TOO_LARGE); 477 return 0; 478 } 479 480 /* MSB's are at the start of the bytes array */ 481 for (i = len - 1; i >= 0; --i) { 482 out[i] = (unsigned char)(bits & 0xFF); 483 bits >>= 8; 484 } 485 /* Tack the length onto the end */ 486 out[len] = (unsigned char)len; 487 488 /* The Returned length includes the tacked on byte */ 489 *out_len = len + 1; 490 return 1; 491} 492 493/* 494 * Encodes a string with a left encoded length added. Note that the 495 * in_len is converted to bits (*8). 496 * 497 * e.g- in="KMAC" gives out[6] = { 0x01, 0x20, 0x4B, 0x4D, 0x41, 0x43 } 498 * len bits K M A C 499 */ 500static int encode_string(unsigned char *out, size_t out_max_len, size_t *out_len, 501 const unsigned char *in, size_t in_len) 502{ 503 if (in == NULL) { 504 *out_len = 0; 505 } else { 506 size_t i, bits, len, sz; 507 508 bits = 8 * in_len; 509 len = get_encode_size(bits); 510 sz = 1 + len + in_len; 511 512 if (sz > out_max_len) { 513 ERR_raise(ERR_LIB_PROV, PROV_R_LENGTH_TOO_LARGE); 514 return 0; 515 } 516 517 out[0] = (unsigned char)len; 518 for (i = len; i > 0; --i) { 519 out[i] = (bits & 0xFF); 520 bits >>= 8; 521 } 522 memcpy(out + len + 1, in, in_len); 523 *out_len = sz; 524 } 525 return 1; 526} 527 528/* 529 * Returns a zero padded encoding of the inputs in1 and an optional 530 * in2 (can be NULL). The padded output must be a multiple of the blocksize 'w'. 531 * The value of w is in bytes (< 256). 532 * 533 * The returned output is: 534 * zero_padded(multiple of w, (left_encode(w) || in1 [|| in2]) 535 */ 536static int bytepad(unsigned char *out, size_t *out_len, 537 const unsigned char *in1, size_t in1_len, 538 const unsigned char *in2, size_t in2_len, size_t w) 539{ 540 int len; 541 unsigned char *p = out; 542 int sz = w; 543 544 if (out == NULL) { 545 if (out_len == NULL) { 546 ERR_raise(ERR_LIB_PROV, ERR_R_PASSED_NULL_PARAMETER); 547 return 0; 548 } 549 sz = 2 + in1_len + (in2 != NULL ? in2_len : 0); 550 *out_len = (sz + w - 1) / w * w; 551 return 1; 552 } 553 554 if (!ossl_assert(w <= 255)) 555 return 0; 556 557 /* Left encoded w */ 558 *p++ = 1; 559 *p++ = (unsigned char)w; 560 /* || in1 */ 561 memcpy(p, in1, in1_len); 562 p += in1_len; 563 /* [ || in2 ] */ 564 if (in2 != NULL && in2_len > 0) { 565 memcpy(p, in2, in2_len); 566 p += in2_len; 567 } 568 /* Figure out the pad size (divisible by w) */ 569 len = p - out; 570 sz = (len + w - 1) / w * w; 571 /* zero pad the end of the buffer */ 572 if (sz != len) 573 memset(p, 0, sz - len); 574 if (out_len != NULL) 575 *out_len = sz; 576 return 1; 577} 578 579/* Returns out = bytepad(encode_string(in), w) */ 580static int kmac_bytepad_encode_key(unsigned char *out, size_t out_max_len, 581 size_t *out_len, 582 const unsigned char *in, size_t in_len, 583 size_t w) 584{ 585 unsigned char tmp[KMAC_MAX_KEY + KMAC_MAX_ENCODED_HEADER_LEN]; 586 size_t tmp_len; 587 588 if (!encode_string(tmp, sizeof(tmp), &tmp_len, in, in_len)) 589 return 0; 590 if (!bytepad(NULL, out_len, tmp, tmp_len, NULL, 0, w)) 591 return 0; 592 if (!ossl_assert(*out_len <= out_max_len)) 593 return 0; 594 return bytepad(out, NULL, tmp, tmp_len, NULL, 0, w); 595} 596 597const OSSL_DISPATCH ossl_kmac128_functions[] = { 598 { OSSL_FUNC_MAC_NEWCTX, (void (*)(void))kmac128_new }, 599 { OSSL_FUNC_MAC_DUPCTX, (void (*)(void))kmac_dup }, 600 { OSSL_FUNC_MAC_FREECTX, (void (*)(void))kmac_free }, 601 { OSSL_FUNC_MAC_INIT, (void (*)(void))kmac_init }, 602 { OSSL_FUNC_MAC_UPDATE, (void (*)(void))kmac_update }, 603 { OSSL_FUNC_MAC_FINAL, (void (*)(void))kmac_final }, 604 { OSSL_FUNC_MAC_GETTABLE_CTX_PARAMS, 605 (void (*)(void))kmac_gettable_ctx_params }, 606 { OSSL_FUNC_MAC_GET_CTX_PARAMS, (void (*)(void))kmac_get_ctx_params }, 607 { OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS, 608 (void (*)(void))kmac_settable_ctx_params }, 609 { OSSL_FUNC_MAC_SET_CTX_PARAMS, (void (*)(void))kmac_set_ctx_params }, 610 { 0, NULL } 611}; 612 613const OSSL_DISPATCH ossl_kmac256_functions[] = { 614 { OSSL_FUNC_MAC_NEWCTX, (void (*)(void))kmac256_new }, 615 { OSSL_FUNC_MAC_DUPCTX, (void (*)(void))kmac_dup }, 616 { OSSL_FUNC_MAC_FREECTX, (void (*)(void))kmac_free }, 617 { OSSL_FUNC_MAC_INIT, (void (*)(void))kmac_init }, 618 { OSSL_FUNC_MAC_UPDATE, (void (*)(void))kmac_update }, 619 { OSSL_FUNC_MAC_FINAL, (void (*)(void))kmac_final }, 620 { OSSL_FUNC_MAC_GETTABLE_CTX_PARAMS, 621 (void (*)(void))kmac_gettable_ctx_params }, 622 { OSSL_FUNC_MAC_GET_CTX_PARAMS, (void (*)(void))kmac_get_ctx_params }, 623 { OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS, 624 (void (*)(void))kmac_settable_ctx_params }, 625 { OSSL_FUNC_MAC_SET_CTX_PARAMS, (void (*)(void))kmac_set_ctx_params }, 626 { 0, NULL } 627}; 628