1 /*
2 * Copyright 2018-2023 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 */
69 static OSSL_FUNC_mac_newctx_fn kmac128_new;
70 static OSSL_FUNC_mac_newctx_fn kmac256_new;
71 static OSSL_FUNC_mac_dupctx_fn kmac_dup;
72 static OSSL_FUNC_mac_freectx_fn kmac_free;
73 static OSSL_FUNC_mac_gettable_ctx_params_fn kmac_gettable_ctx_params;
74 static OSSL_FUNC_mac_get_ctx_params_fn kmac_get_ctx_params;
75 static OSSL_FUNC_mac_settable_ctx_params_fn kmac_settable_ctx_params;
76 static OSSL_FUNC_mac_set_ctx_params_fn kmac_set_ctx_params;
77 static OSSL_FUNC_mac_init_fn kmac_init;
78 static OSSL_FUNC_mac_update_fn kmac_update;
79 static 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") */
111 static const unsigned char kmac_string[] = {
112 0x01, 0x20, 0x4B, 0x4D, 0x41, 0x43
113 };
114
115 #define KMAC_FLAG_XOF_MODE 1
116
117 struct 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
131 static int encode_string(unsigned char *out, size_t out_max_len, size_t *out_len,
132 const unsigned char *in, size_t in_len);
133 static int right_encode(unsigned char *out, size_t out_max_len, size_t *out_len,
134 size_t bits);
135 static 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);
139 static 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
kmac_free(void * vmacctx)144 static 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 */
kmac_new(void * provctx)162 static 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
kmac_fetch_new(void * provctx,const OSSL_PARAM * params)178 static 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
kmac128_new(void * provctx)194 static 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
kmac256_new(void * provctx)204 static 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
kmac_dup(void * vsrc)214 static 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
kmac_setkey(struct kmac_data_st * kctx,const unsigned char * key,size_t keylen)242 static 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 */
kmac_init(void * vmacctx,const unsigned char * key,size_t keylen,const OSSL_PARAM params[])267 static 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
kmac_update(void * vmacctx,const unsigned char * data,size_t datalen)325 static 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
kmac_final(void * vmacctx,unsigned char * out,size_t * outl,size_t outsize)333 static 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
355 static 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 };
kmac_gettable_ctx_params(ossl_unused void * ctx,ossl_unused void * provctx)360 static 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
kmac_get_ctx_params(void * vmacctx,OSSL_PARAM params[])366 static 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
385 static 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 };
kmac_settable_ctx_params(ossl_unused void * ctx,ossl_unused void * provctx)392 static 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 */
kmac_set_ctx_params(void * vmacctx,const OSSL_PARAM * params)407 static 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 */
get_encode_size(size_t bits)448 static 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 */
right_encode(unsigned char * out,size_t out_max_len,size_t * out_len,size_t bits)469 static 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 */
encode_string(unsigned char * out,size_t out_max_len,size_t * out_len,const unsigned char * in,size_t in_len)500 static 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 */
bytepad(unsigned char * out,size_t * out_len,const unsigned char * in1,size_t in1_len,const unsigned char * in2,size_t in2_len,size_t w)536 static 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) */
kmac_bytepad_encode_key(unsigned char * out,size_t out_max_len,size_t * out_len,const unsigned char * in,size_t in_len,size_t w)580 static 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
597 const 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
613 const 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