2 * Copyright 2016-2021 The OpenSSL Project Authors. All Rights Reserved.
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
11 * HMAC low level APIs are deprecated for public use, but still ok for internal
14 #include "internal/deprecated.h"
19 #include <openssl/hmac.h>
20 #include <openssl/evp.h>
21 #include <openssl/kdf.h>
22 #include <openssl/core_names.h>
23 #include <openssl/proverr.h>
24 #include "internal/cryptlib.h"
25 #include "internal/numbers.h"
26 #include "internal/packet.h"
27 #include "crypto/evp.h"
28 #include "prov/provider_ctx.h"
29 #include "prov/providercommon.h"
30 #include "prov/implementations.h"
31 #include "prov/provider_util.h"
32 #include "internal/e_os.h"
34 #define HKDF_MAXBUF 2048
36 static OSSL_FUNC_kdf_newctx_fn kdf_hkdf_new;
37 static OSSL_FUNC_kdf_dupctx_fn kdf_hkdf_dup;
38 static OSSL_FUNC_kdf_freectx_fn kdf_hkdf_free;
39 static OSSL_FUNC_kdf_reset_fn kdf_hkdf_reset;
40 static OSSL_FUNC_kdf_derive_fn kdf_hkdf_derive;
41 static OSSL_FUNC_kdf_settable_ctx_params_fn kdf_hkdf_settable_ctx_params;
42 static OSSL_FUNC_kdf_set_ctx_params_fn kdf_hkdf_set_ctx_params;
43 static OSSL_FUNC_kdf_gettable_ctx_params_fn kdf_hkdf_gettable_ctx_params;
44 static OSSL_FUNC_kdf_get_ctx_params_fn kdf_hkdf_get_ctx_params;
45 static OSSL_FUNC_kdf_derive_fn kdf_tls1_3_derive;
46 static OSSL_FUNC_kdf_settable_ctx_params_fn kdf_tls1_3_settable_ctx_params;
47 static OSSL_FUNC_kdf_set_ctx_params_fn kdf_tls1_3_set_ctx_params;
49 static int HKDF(OSSL_LIB_CTX *libctx, const EVP_MD *evp_md,
50 const unsigned char *salt, size_t salt_len,
51 const unsigned char *key, size_t key_len,
52 const unsigned char *info, size_t info_len,
53 unsigned char *okm, size_t okm_len);
54 static int HKDF_Extract(OSSL_LIB_CTX *libctx, const EVP_MD *evp_md,
55 const unsigned char *salt, size_t salt_len,
56 const unsigned char *ikm, size_t ikm_len,
57 unsigned char *prk, size_t prk_len);
58 static int HKDF_Expand(const EVP_MD *evp_md,
59 const unsigned char *prk, size_t prk_len,
60 const unsigned char *info, size_t info_len,
61 unsigned char *okm, size_t okm_len);
63 /* Settable context parameters that are common across HKDF and the TLS KDF */
64 #define HKDF_COMMON_SETTABLES \
65 OSSL_PARAM_utf8_string(OSSL_KDF_PARAM_MODE, NULL, 0), \
66 OSSL_PARAM_int(OSSL_KDF_PARAM_MODE, NULL), \
67 OSSL_PARAM_utf8_string(OSSL_KDF_PARAM_PROPERTIES, NULL, 0), \
68 OSSL_PARAM_utf8_string(OSSL_KDF_PARAM_DIGEST, NULL, 0), \
69 OSSL_PARAM_octet_string(OSSL_KDF_PARAM_KEY, NULL, 0), \
70 OSSL_PARAM_octet_string(OSSL_KDF_PARAM_SALT, NULL, 0)
80 unsigned char *prefix;
86 unsigned char info[HKDF_MAXBUF];
90 static void *kdf_hkdf_new(void *provctx)
94 if (!ossl_prov_is_running())
97 if ((ctx = OPENSSL_zalloc(sizeof(*ctx))) == NULL)
98 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
100 ctx->provctx = provctx;
104 static void kdf_hkdf_free(void *vctx)
106 KDF_HKDF *ctx = (KDF_HKDF *)vctx;
114 static void kdf_hkdf_reset(void *vctx)
116 KDF_HKDF *ctx = (KDF_HKDF *)vctx;
117 void *provctx = ctx->provctx;
119 ossl_prov_digest_reset(&ctx->digest);
120 OPENSSL_free(ctx->salt);
121 OPENSSL_free(ctx->prefix);
122 OPENSSL_free(ctx->label);
123 OPENSSL_clear_free(ctx->data, ctx->data_len);
124 OPENSSL_clear_free(ctx->key, ctx->key_len);
125 OPENSSL_cleanse(ctx->info, ctx->info_len);
126 memset(ctx, 0, sizeof(*ctx));
127 ctx->provctx = provctx;
130 static void *kdf_hkdf_dup(void *vctx)
132 const KDF_HKDF *src = (const KDF_HKDF *)vctx;
135 dest = kdf_hkdf_new(src->provctx);
137 if (!ossl_prov_memdup(src->salt, src->salt_len, &dest->salt,
139 || !ossl_prov_memdup(src->key, src->key_len,
140 &dest->key , &dest->key_len)
141 || !ossl_prov_memdup(src->prefix, src->prefix_len,
142 &dest->prefix, &dest->prefix_len)
143 || !ossl_prov_memdup(src->label, src->label_len,
144 &dest->label, &dest->label_len)
145 || !ossl_prov_memdup(src->data, src->data_len,
146 &dest->data, &dest->data_len)
147 || !ossl_prov_digest_copy(&dest->digest, &src->digest))
149 memcpy(dest->info, src->info, sizeof(dest->info));
150 dest->info_len = src->info_len;
151 dest->mode = src->mode;
160 static size_t kdf_hkdf_size(KDF_HKDF *ctx)
163 const EVP_MD *md = ossl_prov_digest_md(&ctx->digest);
165 if (ctx->mode != EVP_KDF_HKDF_MODE_EXTRACT_ONLY)
169 ERR_raise(ERR_LIB_PROV, PROV_R_MISSING_MESSAGE_DIGEST);
172 sz = EVP_MD_get_size(md);
179 static int kdf_hkdf_derive(void *vctx, unsigned char *key, size_t keylen,
180 const OSSL_PARAM params[])
182 KDF_HKDF *ctx = (KDF_HKDF *)vctx;
183 OSSL_LIB_CTX *libctx = PROV_LIBCTX_OF(ctx->provctx);
186 if (!ossl_prov_is_running() || !kdf_hkdf_set_ctx_params(ctx, params))
189 md = ossl_prov_digest_md(&ctx->digest);
191 ERR_raise(ERR_LIB_PROV, PROV_R_MISSING_MESSAGE_DIGEST);
194 if (ctx->key == NULL) {
195 ERR_raise(ERR_LIB_PROV, PROV_R_MISSING_KEY);
199 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH);
204 case EVP_KDF_HKDF_MODE_EXTRACT_AND_EXPAND:
206 return HKDF(libctx, md, ctx->salt, ctx->salt_len,
207 ctx->key, ctx->key_len, ctx->info, ctx->info_len, key, keylen);
209 case EVP_KDF_HKDF_MODE_EXTRACT_ONLY:
210 return HKDF_Extract(libctx, md, ctx->salt, ctx->salt_len,
211 ctx->key, ctx->key_len, key, keylen);
213 case EVP_KDF_HKDF_MODE_EXPAND_ONLY:
214 return HKDF_Expand(md, ctx->key, ctx->key_len, ctx->info,
215 ctx->info_len, key, keylen);
219 static int hkdf_common_set_ctx_params(KDF_HKDF *ctx, const OSSL_PARAM params[])
221 OSSL_LIB_CTX *libctx = PROV_LIBCTX_OF(ctx->provctx);
228 if (!ossl_prov_digest_load_from_params(&ctx->digest, params, libctx))
231 if ((p = OSSL_PARAM_locate_const(params, OSSL_KDF_PARAM_MODE)) != NULL) {
232 if (p->data_type == OSSL_PARAM_UTF8_STRING) {
233 if (strcasecmp(p->data, "EXTRACT_AND_EXPAND") == 0) {
234 ctx->mode = EVP_KDF_HKDF_MODE_EXTRACT_AND_EXPAND;
235 } else if (strcasecmp(p->data, "EXTRACT_ONLY") == 0) {
236 ctx->mode = EVP_KDF_HKDF_MODE_EXTRACT_ONLY;
237 } else if (strcasecmp(p->data, "EXPAND_ONLY") == 0) {
238 ctx->mode = EVP_KDF_HKDF_MODE_EXPAND_ONLY;
240 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_MODE);
243 } else if (OSSL_PARAM_get_int(p, &n)) {
244 if (n != EVP_KDF_HKDF_MODE_EXTRACT_AND_EXPAND
245 && n != EVP_KDF_HKDF_MODE_EXTRACT_ONLY
246 && n != EVP_KDF_HKDF_MODE_EXPAND_ONLY) {
247 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_MODE);
252 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_MODE);
257 if ((p = OSSL_PARAM_locate_const(params, OSSL_KDF_PARAM_KEY)) != NULL) {
258 OPENSSL_clear_free(ctx->key, ctx->key_len);
260 if (!OSSL_PARAM_get_octet_string(p, (void **)&ctx->key, 0,
265 if ((p = OSSL_PARAM_locate_const(params, OSSL_KDF_PARAM_SALT)) != NULL) {
266 if (p->data_size != 0 && p->data != NULL) {
267 OPENSSL_free(ctx->salt);
269 if (!OSSL_PARAM_get_octet_string(p, (void **)&ctx->salt, 0,
278 static int kdf_hkdf_set_ctx_params(void *vctx, const OSSL_PARAM params[])
281 KDF_HKDF *ctx = vctx;
286 if (!hkdf_common_set_ctx_params(ctx, params))
289 /* The info fields concatenate, so process them all */
290 if ((p = OSSL_PARAM_locate_const(params, OSSL_KDF_PARAM_INFO)) != NULL) {
292 for (; p != NULL; p = OSSL_PARAM_locate_const(p + 1,
293 OSSL_KDF_PARAM_INFO)) {
294 const void *q = ctx->info + ctx->info_len;
297 if (p->data_size != 0
299 && !OSSL_PARAM_get_octet_string(p, (void **)&q,
300 HKDF_MAXBUF - ctx->info_len,
309 static const OSSL_PARAM *kdf_hkdf_settable_ctx_params(ossl_unused void *ctx,
310 ossl_unused void *provctx)
312 static const OSSL_PARAM known_settable_ctx_params[] = {
313 HKDF_COMMON_SETTABLES,
314 OSSL_PARAM_octet_string(OSSL_KDF_PARAM_INFO, NULL, 0),
317 return known_settable_ctx_params;
320 static int kdf_hkdf_get_ctx_params(void *vctx, OSSL_PARAM params[])
322 KDF_HKDF *ctx = (KDF_HKDF *)vctx;
325 if ((p = OSSL_PARAM_locate(params, OSSL_KDF_PARAM_SIZE)) != NULL) {
326 size_t sz = kdf_hkdf_size(ctx);
330 return OSSL_PARAM_set_size_t(p, sz);
335 static const OSSL_PARAM *kdf_hkdf_gettable_ctx_params(ossl_unused void *ctx,
336 ossl_unused void *provctx)
338 static const OSSL_PARAM known_gettable_ctx_params[] = {
339 OSSL_PARAM_size_t(OSSL_KDF_PARAM_SIZE, NULL),
342 return known_gettable_ctx_params;
345 const OSSL_DISPATCH ossl_kdf_hkdf_functions[] = {
346 { OSSL_FUNC_KDF_NEWCTX, (void(*)(void))kdf_hkdf_new },
347 { OSSL_FUNC_KDF_DUPCTX, (void(*)(void))kdf_hkdf_dup },
348 { OSSL_FUNC_KDF_FREECTX, (void(*)(void))kdf_hkdf_free },
349 { OSSL_FUNC_KDF_RESET, (void(*)(void))kdf_hkdf_reset },
350 { OSSL_FUNC_KDF_DERIVE, (void(*)(void))kdf_hkdf_derive },
351 { OSSL_FUNC_KDF_SETTABLE_CTX_PARAMS,
352 (void(*)(void))kdf_hkdf_settable_ctx_params },
353 { OSSL_FUNC_KDF_SET_CTX_PARAMS, (void(*)(void))kdf_hkdf_set_ctx_params },
354 { OSSL_FUNC_KDF_GETTABLE_CTX_PARAMS,
355 (void(*)(void))kdf_hkdf_gettable_ctx_params },
356 { OSSL_FUNC_KDF_GET_CTX_PARAMS, (void(*)(void))kdf_hkdf_get_ctx_params },
361 * Refer to "HMAC-based Extract-and-Expand Key Derivation Function (HKDF)"
362 * Section 2 (https://tools.ietf.org/html/rfc5869#section-2) and
363 * "Cryptographic Extraction and Key Derivation: The HKDF Scheme"
364 * Section 4.2 (https://eprint.iacr.org/2010/264.pdf).
367 * The scheme HKDF is specified as:
368 * HKDF(XTS, SKM, CTXinfo, L) = K(1) | K(2) | ... | K(t)
371 * SKM is source key material
372 * XTS is extractor salt (which may be null or constant)
373 * CTXinfo is context information (may be null)
374 * L is the number of key bits to be produced by KDF
375 * k is the output length in bits of the hash function used with HMAC
377 * the value K(t) is truncated to its first d = L mod k bits.
380 * 2.2. Step 1: Extract
381 * HKDF-Extract(salt, IKM) -> PRK
382 * 2.3. Step 2: Expand
383 * HKDF-Expand(PRK, info, L) -> OKM
385 static int HKDF(OSSL_LIB_CTX *libctx, const EVP_MD *evp_md,
386 const unsigned char *salt, size_t salt_len,
387 const unsigned char *ikm, size_t ikm_len,
388 const unsigned char *info, size_t info_len,
389 unsigned char *okm, size_t okm_len)
391 unsigned char prk[EVP_MAX_MD_SIZE];
395 sz = EVP_MD_get_size(evp_md);
398 prk_len = (size_t)sz;
400 /* Step 1: HKDF-Extract(salt, IKM) -> PRK */
401 if (!HKDF_Extract(libctx, evp_md,
402 salt, salt_len, ikm, ikm_len, prk, prk_len))
405 /* Step 2: HKDF-Expand(PRK, info, L) -> OKM */
406 ret = HKDF_Expand(evp_md, prk, prk_len, info, info_len, okm, okm_len);
407 OPENSSL_cleanse(prk, sizeof(prk));
413 * Refer to "HMAC-based Extract-and-Expand Key Derivation Function (HKDF)"
414 * Section 2.2 (https://tools.ietf.org/html/rfc5869#section-2.2).
416 * 2.2. Step 1: Extract
418 * HKDF-Extract(salt, IKM) -> PRK
421 * Hash a hash function; HashLen denotes the length of the
422 * hash function output in octets
425 * salt optional salt value (a non-secret random value);
426 * if not provided, it is set to a string of HashLen zeros.
427 * IKM input keying material
430 * PRK a pseudorandom key (of HashLen octets)
432 * The output PRK is calculated as follows:
434 * PRK = HMAC-Hash(salt, IKM)
436 static int HKDF_Extract(OSSL_LIB_CTX *libctx, const EVP_MD *evp_md,
437 const unsigned char *salt, size_t salt_len,
438 const unsigned char *ikm, size_t ikm_len,
439 unsigned char *prk, size_t prk_len)
441 int sz = EVP_MD_get_size(evp_md);
445 if (prk_len != (size_t)sz) {
446 ERR_raise(ERR_LIB_PROV, PROV_R_WRONG_OUTPUT_BUFFER_SIZE);
449 /* calc: PRK = HMAC-Hash(salt, IKM) */
451 EVP_Q_mac(libctx, "HMAC", NULL, EVP_MD_get0_name(evp_md), NULL, salt,
452 salt_len, ikm, ikm_len, prk, EVP_MD_get_size(evp_md), NULL)
457 * Refer to "HMAC-based Extract-and-Expand Key Derivation Function (HKDF)"
458 * Section 2.3 (https://tools.ietf.org/html/rfc5869#section-2.3).
460 * 2.3. Step 2: Expand
462 * HKDF-Expand(PRK, info, L) -> OKM
465 * Hash a hash function; HashLen denotes the length of the
466 * hash function output in octets
469 * PRK a pseudorandom key of at least HashLen octets
470 * (usually, the output from the extract step)
471 * info optional context and application specific information
472 * (can be a zero-length string)
473 * L length of output keying material in octets
477 * OKM output keying material (of L octets)
479 * The output OKM is calculated as follows:
481 * N = ceil(L/HashLen)
482 * T = T(1) | T(2) | T(3) | ... | T(N)
483 * OKM = first L octets of T
486 * T(0) = empty string (zero length)
487 * T(1) = HMAC-Hash(PRK, T(0) | info | 0x01)
488 * T(2) = HMAC-Hash(PRK, T(1) | info | 0x02)
489 * T(3) = HMAC-Hash(PRK, T(2) | info | 0x03)
492 * (where the constant concatenated to the end of each T(n) is a
495 static int HKDF_Expand(const EVP_MD *evp_md,
496 const unsigned char *prk, size_t prk_len,
497 const unsigned char *info, size_t info_len,
498 unsigned char *okm, size_t okm_len)
503 unsigned char prev[EVP_MAX_MD_SIZE];
504 size_t done_len = 0, dig_len, n;
506 sz = EVP_MD_get_size(evp_md);
509 dig_len = (size_t)sz;
511 /* calc: N = ceil(L/HashLen) */
512 n = okm_len / dig_len;
513 if (okm_len % dig_len)
516 if (n > 255 || okm == NULL)
519 if ((hmac = HMAC_CTX_new()) == NULL)
522 if (!HMAC_Init_ex(hmac, prk, prk_len, evp_md, NULL))
525 for (i = 1; i <= n; i++) {
527 const unsigned char ctr = i;
529 /* calc: T(i) = HMAC-Hash(PRK, T(i - 1) | info | i) */
531 if (!HMAC_Init_ex(hmac, NULL, 0, NULL, NULL))
534 if (!HMAC_Update(hmac, prev, dig_len))
538 if (!HMAC_Update(hmac, info, info_len))
541 if (!HMAC_Update(hmac, &ctr, 1))
544 if (!HMAC_Final(hmac, prev, NULL))
547 copy_len = (done_len + dig_len > okm_len) ?
551 memcpy(okm + done_len, prev, copy_len);
553 done_len += copy_len;
558 OPENSSL_cleanse(prev, sizeof(prev));
564 * TLS uses slight variations of the above and for FIPS validation purposes,
565 * they need to be present here.
566 * Refer to RFC 8446 section 7 for specific details.
570 * Given a |secret|; a |label| of length |labellen|; and |data| of length
571 * |datalen| (e.g. typically a hash of the handshake messages), derive a new
572 * secret |outlen| bytes long and store it in the location pointed to be |out|.
573 * The |data| value may be zero length. Returns 1 on success and 0 on failure.
575 static int prov_tls13_hkdf_expand(const EVP_MD *md,
576 const unsigned char *key, size_t keylen,
577 const unsigned char *prefix, size_t prefixlen,
578 const unsigned char *label, size_t labellen,
579 const unsigned char *data, size_t datalen,
580 unsigned char *out, size_t outlen)
583 unsigned char hkdflabel[HKDF_MAXBUF];
587 * 2 bytes for length of derived secret + 1 byte for length of combined
588 * prefix and label + bytes for the label itself + 1 byte length of hash
589 * + bytes for the hash itself. We've got the maximum the KDF can handle
590 * which should always be sufficient.
592 if (!WPACKET_init_static_len(&pkt, hkdflabel, sizeof(hkdflabel), 0)
593 || !WPACKET_put_bytes_u16(&pkt, outlen)
594 || !WPACKET_start_sub_packet_u8(&pkt)
595 || !WPACKET_memcpy(&pkt, prefix, prefixlen)
596 || !WPACKET_memcpy(&pkt, label, labellen)
597 || !WPACKET_close(&pkt)
598 || !WPACKET_sub_memcpy_u8(&pkt, data, (data == NULL) ? 0 : datalen)
599 || !WPACKET_get_total_written(&pkt, &hkdflabellen)
600 || !WPACKET_finish(&pkt)) {
601 WPACKET_cleanup(&pkt);
605 return HKDF_Expand(md, key, keylen, hkdflabel, hkdflabellen,
609 static int prov_tls13_hkdf_generate_secret(OSSL_LIB_CTX *libctx,
611 const unsigned char *prevsecret,
612 size_t prevsecretlen,
613 const unsigned char *insecret,
615 const unsigned char *prefix,
617 const unsigned char *label,
619 unsigned char *out, size_t outlen)
623 unsigned char preextractsec[EVP_MAX_MD_SIZE];
624 /* Always filled with zeros */
625 static const unsigned char default_zeros[EVP_MAX_MD_SIZE];
627 ret = EVP_MD_get_size(md);
628 /* Ensure cast to size_t is safe */
633 if (insecret == NULL) {
634 insecret = default_zeros;
637 if (prevsecret == NULL) {
638 prevsecret = default_zeros;
641 EVP_MD_CTX *mctx = EVP_MD_CTX_new();
642 unsigned char hash[EVP_MAX_MD_SIZE];
644 /* The pre-extract derive step uses a hash of no messages */
646 || EVP_DigestInit_ex(mctx, md, NULL) <= 0
647 || EVP_DigestFinal_ex(mctx, hash, NULL) <= 0) {
648 EVP_MD_CTX_free(mctx);
651 EVP_MD_CTX_free(mctx);
653 /* Generate the pre-extract secret */
654 if (!prov_tls13_hkdf_expand(md, prevsecret, mdlen,
655 prefix, prefixlen, label, labellen,
656 hash, mdlen, preextractsec, mdlen))
658 prevsecret = preextractsec;
659 prevsecretlen = mdlen;
662 ret = HKDF_Extract(libctx, md, prevsecret, prevsecretlen,
663 insecret, insecretlen, out, outlen);
665 if (prevsecret == preextractsec)
666 OPENSSL_cleanse(preextractsec, mdlen);
670 static int kdf_tls1_3_derive(void *vctx, unsigned char *key, size_t keylen,
671 const OSSL_PARAM params[])
673 KDF_HKDF *ctx = (KDF_HKDF *)vctx;
676 if (!ossl_prov_is_running() || !kdf_tls1_3_set_ctx_params(ctx, params))
679 md = ossl_prov_digest_md(&ctx->digest);
681 ERR_raise(ERR_LIB_PROV, PROV_R_MISSING_MESSAGE_DIGEST);
689 case EVP_KDF_HKDF_MODE_EXTRACT_ONLY:
690 return prov_tls13_hkdf_generate_secret(PROV_LIBCTX_OF(ctx->provctx),
692 ctx->salt, ctx->salt_len,
693 ctx->key, ctx->key_len,
694 ctx->prefix, ctx->prefix_len,
695 ctx->label, ctx->label_len,
698 case EVP_KDF_HKDF_MODE_EXPAND_ONLY:
699 return prov_tls13_hkdf_expand(md, ctx->key, ctx->key_len,
700 ctx->prefix, ctx->prefix_len,
701 ctx->label, ctx->label_len,
702 ctx->data, ctx->data_len,
707 static int kdf_tls1_3_set_ctx_params(void *vctx, const OSSL_PARAM params[])
710 KDF_HKDF *ctx = vctx;
715 if (!hkdf_common_set_ctx_params(ctx, params))
718 if (ctx->mode == EVP_KDF_HKDF_MODE_EXTRACT_AND_EXPAND) {
719 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_MODE);
723 if ((p = OSSL_PARAM_locate_const(params, OSSL_KDF_PARAM_PREFIX)) != NULL) {
724 OPENSSL_free(ctx->prefix);
726 if (!OSSL_PARAM_get_octet_string(p, (void **)&ctx->prefix, 0,
731 if ((p = OSSL_PARAM_locate_const(params, OSSL_KDF_PARAM_LABEL)) != NULL) {
732 OPENSSL_free(ctx->label);
734 if (!OSSL_PARAM_get_octet_string(p, (void **)&ctx->label, 0,
739 OPENSSL_clear_free(ctx->data, ctx->data_len);
741 if ((p = OSSL_PARAM_locate_const(params, OSSL_KDF_PARAM_DATA)) != NULL
742 && !OSSL_PARAM_get_octet_string(p, (void **)&ctx->data, 0,
748 static const OSSL_PARAM *kdf_tls1_3_settable_ctx_params(ossl_unused void *ctx,
749 ossl_unused void *provctx)
751 static const OSSL_PARAM known_settable_ctx_params[] = {
752 HKDF_COMMON_SETTABLES,
753 OSSL_PARAM_octet_string(OSSL_KDF_PARAM_PREFIX, NULL, 0),
754 OSSL_PARAM_octet_string(OSSL_KDF_PARAM_LABEL, NULL, 0),
755 OSSL_PARAM_octet_string(OSSL_KDF_PARAM_DATA, NULL, 0),
758 return known_settable_ctx_params;
761 const OSSL_DISPATCH ossl_kdf_tls1_3_kdf_functions[] = {
762 { OSSL_FUNC_KDF_NEWCTX, (void(*)(void))kdf_hkdf_new },
763 { OSSL_FUNC_KDF_DUPCTX, (void(*)(void))kdf_hkdf_dup },
764 { OSSL_FUNC_KDF_FREECTX, (void(*)(void))kdf_hkdf_free },
765 { OSSL_FUNC_KDF_RESET, (void(*)(void))kdf_hkdf_reset },
766 { OSSL_FUNC_KDF_DERIVE, (void(*)(void))kdf_tls1_3_derive },
767 { OSSL_FUNC_KDF_SETTABLE_CTX_PARAMS,
768 (void(*)(void))kdf_tls1_3_settable_ctx_params },
769 { OSSL_FUNC_KDF_SET_CTX_PARAMS, (void(*)(void))kdf_tls1_3_set_ctx_params },
770 { OSSL_FUNC_KDF_GETTABLE_CTX_PARAMS,
771 (void(*)(void))kdf_hkdf_gettable_ctx_params },
772 { OSSL_FUNC_KDF_GET_CTX_PARAMS, (void(*)(void))kdf_hkdf_get_ctx_params },