2 * Copyright 2019-2022 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
5 * Licensed under the Apache License 2.0 (the "License"). You may not use
6 * this file except in compliance with the License. You can obtain a copy
7 * in the file LICENSE in the source distribution or at
8 * https://www.openssl.org/source/license.html
11 #include "internal/e_os.h"
12 #include <openssl/core_names.h>
13 #include <openssl/core_dispatch.h>
14 #include <openssl/err.h>
15 #include <openssl/evp.h>
16 #include <openssl/params.h>
17 #include <openssl/proverr.h>
18 #include "internal/packet.h"
19 #include "internal/der.h"
20 #include "internal/nelem.h"
21 #include "prov/provider_ctx.h"
22 #include "prov/providercommon.h"
23 #include "prov/implementations.h"
24 #include "prov/provider_util.h"
25 #include "prov/der_wrap.h"
27 #define X942KDF_MAX_INLEN (1 << 30)
29 static OSSL_FUNC_kdf_newctx_fn x942kdf_new
;
30 static OSSL_FUNC_kdf_dupctx_fn x942kdf_dup
;
31 static OSSL_FUNC_kdf_freectx_fn x942kdf_free
;
32 static OSSL_FUNC_kdf_reset_fn x942kdf_reset
;
33 static OSSL_FUNC_kdf_derive_fn x942kdf_derive
;
34 static OSSL_FUNC_kdf_settable_ctx_params_fn x942kdf_settable_ctx_params
;
35 static OSSL_FUNC_kdf_set_ctx_params_fn x942kdf_set_ctx_params
;
36 static OSSL_FUNC_kdf_gettable_ctx_params_fn x942kdf_gettable_ctx_params
;
37 static OSSL_FUNC_kdf_get_ctx_params_fn x942kdf_get_ctx_params
;
42 unsigned char *secret
;
44 unsigned char *acvpinfo
;
46 unsigned char *partyuinfo
, *partyvinfo
, *supp_pubinfo
, *supp_privinfo
;
47 size_t partyuinfo_len
, partyvinfo_len
, supp_pubinfo_len
, supp_privinfo_len
;
49 const unsigned char *cek_oid
;
55 * A table of allowed wrapping algorithms, oids and the associated output
57 * NOTE: RC2wrap and camellia128_wrap have been removed as there are no
58 * corresponding ciphers for these operations.
62 const unsigned char *oid
;
64 size_t keklen
; /* size in bytes */
66 { "AES-128-WRAP", ossl_der_oid_id_aes128_wrap
, DER_OID_SZ_id_aes128_wrap
,
68 { "AES-192-WRAP", ossl_der_oid_id_aes192_wrap
, DER_OID_SZ_id_aes192_wrap
,
70 { "AES-256-WRAP", ossl_der_oid_id_aes256_wrap
, DER_OID_SZ_id_aes256_wrap
,
73 { "DES3-WRAP", ossl_der_oid_id_alg_CMS3DESwrap
,
74 DER_OID_SZ_id_alg_CMS3DESwrap
, 24 },
78 static int find_alg_id(OSSL_LIB_CTX
*libctx
, const char *algname
,
79 const char *propq
, size_t *id
)
85 cipher
= EVP_CIPHER_fetch(libctx
, algname
, propq
);
87 for (i
= 0; i
< OSSL_NELEM(kek_algs
); i
++) {
88 if (EVP_CIPHER_is_a(cipher
, kek_algs
[i
].name
)) {
95 ERR_raise(ERR_LIB_PROV
, PROV_R_UNSUPPORTED_CEK_ALG
);
97 EVP_CIPHER_free(cipher
);
101 static int DER_w_keyinfo(WPACKET
*pkt
,
102 const unsigned char *der_oid
, size_t der_oidlen
,
103 unsigned char **pcounter
)
105 return ossl_DER_w_begin_sequence(pkt
, -1)
106 /* Store the initial value of 1 into the counter */
107 && ossl_DER_w_octet_string_uint32(pkt
, -1, 1)
108 /* Remember where we stored the counter in the buffer */
110 || (*pcounter
= WPACKET_get_curr(pkt
)) != NULL
)
111 && ossl_DER_w_precompiled(pkt
, -1, der_oid
, der_oidlen
)
112 && ossl_DER_w_end_sequence(pkt
, -1);
115 static int der_encode_sharedinfo(WPACKET
*pkt
, unsigned char *buf
, size_t buflen
,
116 const unsigned char *der_oid
, size_t der_oidlen
,
117 const unsigned char *acvp
, size_t acvplen
,
118 const unsigned char *partyu
, size_t partyulen
,
119 const unsigned char *partyv
, size_t partyvlen
,
120 const unsigned char *supp_pub
, size_t supp_publen
,
121 const unsigned char *supp_priv
, size_t supp_privlen
,
122 uint32_t keylen_bits
, unsigned char **pcounter
)
124 return (buf
!= NULL
? WPACKET_init_der(pkt
, buf
, buflen
) :
125 WPACKET_init_null_der(pkt
))
126 && ossl_DER_w_begin_sequence(pkt
, -1)
127 && (supp_priv
== NULL
128 || ossl_DER_w_octet_string(pkt
, 3, supp_priv
, supp_privlen
))
130 || ossl_DER_w_octet_string(pkt
, 2, supp_pub
, supp_publen
))
132 || ossl_DER_w_octet_string_uint32(pkt
, 2, keylen_bits
))
133 && (partyv
== NULL
|| ossl_DER_w_octet_string(pkt
, 1, partyv
, partyvlen
))
134 && (partyu
== NULL
|| ossl_DER_w_octet_string(pkt
, 0, partyu
, partyulen
))
135 && (acvp
== NULL
|| ossl_DER_w_precompiled(pkt
, -1, acvp
, acvplen
))
136 && DER_w_keyinfo(pkt
, der_oid
, der_oidlen
, pcounter
)
137 && ossl_DER_w_end_sequence(pkt
, -1)
138 && WPACKET_finish(pkt
);
142 * Encode the other info structure.
144 * The ANS X9.42-2003 standard uses OtherInfo:
146 * OtherInfo ::= SEQUENCE {
147 * keyInfo KeySpecificInfo,
148 * partyUInfo [0] OCTET STRING OPTIONAL,
149 * partyVInfo [1] OCTET STRING OPTIONAL,
150 * suppPubInfo [2] OCTET STRING OPTIONAL,
151 * suppPrivInfo [3] OCTET STRING OPTIONAL
154 * KeySpecificInfo ::= SEQUENCE {
155 * algorithm OBJECT IDENTIFIER,
156 * counter OCTET STRING SIZE (4..4)
159 * RFC2631 Section 2.1.2 Contains the following definition for OtherInfo
161 * OtherInfo ::= SEQUENCE {
162 * keyInfo KeySpecificInfo,
163 * partyAInfo [0] OCTET STRING OPTIONAL,
164 * suppPubInfo [2] OCTET STRING
166 * Where suppPubInfo is the key length (in bits) (stored into 4 bytes)
168 * |keylen| is the length (in bytes) of the generated KEK. It is stored into
169 * suppPubInfo (in bits). It is ignored if the value is 0.
170 * |cek_oid| The oid of the key wrapping algorithm.
171 * |cek_oidlen| The length (in bytes) of the key wrapping algorithm oid,
172 * |acvp| is the optional blob of DER data representing one or more of the
173 * OtherInfo fields related to |partyu|, |partyv|, |supp_pub| and |supp_priv|.
174 * This field should normally be NULL. If |acvp| is non NULL then |partyu|,
175 * |partyv|, |supp_pub| and |supp_priv| should all be NULL.
176 * |acvp_len| is the |acvp| length (in bytes).
177 * |partyu| is the optional public info contributed by the initiator.
178 * It can be NULL. (It is also used as the ukm by CMS).
179 * |partyu_len| is the |partyu| length (in bytes).
180 * |partyv| is the optional public info contributed by the responder.
182 * |partyv_len| is the |partyv| length (in bytes).
183 * |supp_pub| is the optional additional, mutually-known public information.
184 * It can be NULL. |keylen| should be 0 if this is not NULL.
185 * |supp_pub_len| is the |supp_pub| length (in bytes).
186 * |supp_priv| is the optional additional, mutually-known private information.
188 * |supp_priv_len| is the |supp_priv| length (in bytes).
189 * |der| is the returned encoded data. It must be freed by the caller.
190 * |der_len| is the returned size of the encoded data.
191 * |out_ctr| returns a pointer to the counter data which is embedded inside the
192 * encoded data. This allows the counter bytes to be updated without
195 * Returns: 1 if successfully encoded, or 0 otherwise.
196 * Assumptions: |der|, |der_len| & |out_ctr| are not NULL.
199 x942_encode_otherinfo(size_t keylen
,
200 const unsigned char *cek_oid
, size_t cek_oid_len
,
201 const unsigned char *acvp
, size_t acvp_len
,
202 const unsigned char *partyu
, size_t partyu_len
,
203 const unsigned char *partyv
, size_t partyv_len
,
204 const unsigned char *supp_pub
, size_t supp_pub_len
,
205 const unsigned char *supp_priv
, size_t supp_priv_len
,
206 unsigned char **der
, size_t *der_len
,
207 unsigned char **out_ctr
)
210 unsigned char *pcounter
= NULL
, *der_buf
= NULL
;
211 size_t der_buflen
= 0;
213 uint32_t keylen_bits
;
215 /* keylenbits must fit into 4 bytes */
216 if (keylen
> 0xFFFFFF)
218 keylen_bits
= 8 * keylen
;
220 /* Calculate the size of the buffer */
221 if (!der_encode_sharedinfo(&pkt
, NULL
, 0, cek_oid
, cek_oid_len
,
223 partyu
, partyu_len
, partyv
, partyv_len
,
224 supp_pub
, supp_pub_len
, supp_priv
, supp_priv_len
,
226 || !WPACKET_get_total_written(&pkt
, &der_buflen
))
228 WPACKET_cleanup(&pkt
);
229 /* Alloc the buffer */
230 der_buf
= OPENSSL_zalloc(der_buflen
);
233 /* Encode into the buffer */
234 if (!der_encode_sharedinfo(&pkt
, der_buf
, der_buflen
, cek_oid
, cek_oid_len
,
236 partyu
, partyu_len
, partyv
, partyv_len
,
237 supp_pub
, supp_pub_len
, supp_priv
, supp_priv_len
,
238 keylen_bits
, &pcounter
))
241 * Since we allocated the exact size required, the buffer should point to the
242 * start of the allocated buffer at this point.
244 if (WPACKET_get_curr(&pkt
) != der_buf
)
248 * The data for the DER encoded octet string of a 32 bit counter = 1
249 * should be 04 04 00 00 00 01
250 * So just check the header is correct and skip over it.
251 * This counter will be incremented in the kdf update loop.
254 || pcounter
[0] != 0x04
255 || pcounter
[1] != 0x04)
257 *out_ctr
= (pcounter
+ 2);
259 *der_len
= der_buflen
;
262 WPACKET_cleanup(&pkt
);
266 static int x942kdf_hash_kdm(const EVP_MD
*kdf_md
,
267 const unsigned char *z
, size_t z_len
,
268 const unsigned char *other
, size_t other_len
,
270 unsigned char *derived_key
, size_t derived_key_len
)
273 size_t counter
, out_len
, len
= derived_key_len
;
274 unsigned char mac
[EVP_MAX_MD_SIZE
];
275 unsigned char *out
= derived_key
;
276 EVP_MD_CTX
*ctx
= NULL
, *ctx_init
= NULL
;
278 if (z_len
> X942KDF_MAX_INLEN
279 || other_len
> X942KDF_MAX_INLEN
280 || derived_key_len
> X942KDF_MAX_INLEN
281 || derived_key_len
== 0) {
282 ERR_raise(ERR_LIB_PROV
, PROV_R_BAD_LENGTH
);
286 hlen
= EVP_MD_get_size(kdf_md
);
289 out_len
= (size_t)hlen
;
291 ctx
= EVP_MD_CTX_create();
292 ctx_init
= EVP_MD_CTX_create();
293 if (ctx
== NULL
|| ctx_init
== NULL
)
296 if (!EVP_DigestInit(ctx_init
, kdf_md
))
299 for (counter
= 1;; counter
++) {
300 /* updating the ctr modifies 4 bytes in the 'other' buffer */
301 ctr
[0] = (unsigned char)((counter
>> 24) & 0xff);
302 ctr
[1] = (unsigned char)((counter
>> 16) & 0xff);
303 ctr
[2] = (unsigned char)((counter
>> 8) & 0xff);
304 ctr
[3] = (unsigned char)(counter
& 0xff);
306 if (!EVP_MD_CTX_copy_ex(ctx
, ctx_init
)
307 || !EVP_DigestUpdate(ctx
, z
, z_len
)
308 || !EVP_DigestUpdate(ctx
, other
, other_len
))
310 if (len
>= out_len
) {
311 if (!EVP_DigestFinal_ex(ctx
, out
, NULL
))
318 if (!EVP_DigestFinal_ex(ctx
, mac
, NULL
))
320 memcpy(out
, mac
, len
);
326 EVP_MD_CTX_free(ctx
);
327 EVP_MD_CTX_free(ctx_init
);
328 OPENSSL_cleanse(mac
, sizeof(mac
));
332 static void *x942kdf_new(void *provctx
)
336 if (!ossl_prov_is_running())
339 if ((ctx
= OPENSSL_zalloc(sizeof(*ctx
))) == NULL
)
341 ctx
->provctx
= provctx
;
342 ctx
->use_keybits
= 1;
346 static void x942kdf_reset(void *vctx
)
348 KDF_X942
*ctx
= (KDF_X942
*)vctx
;
349 void *provctx
= ctx
->provctx
;
351 ossl_prov_digest_reset(&ctx
->digest
);
352 OPENSSL_clear_free(ctx
->secret
, ctx
->secret_len
);
353 OPENSSL_clear_free(ctx
->acvpinfo
, ctx
->acvpinfo_len
);
354 OPENSSL_clear_free(ctx
->partyuinfo
, ctx
->partyuinfo_len
);
355 OPENSSL_clear_free(ctx
->partyvinfo
, ctx
->partyvinfo_len
);
356 OPENSSL_clear_free(ctx
->supp_pubinfo
, ctx
->supp_pubinfo_len
);
357 OPENSSL_clear_free(ctx
->supp_privinfo
, ctx
->supp_privinfo_len
);
358 memset(ctx
, 0, sizeof(*ctx
));
359 ctx
->provctx
= provctx
;
360 ctx
->use_keybits
= 1;
363 static void x942kdf_free(void *vctx
)
365 KDF_X942
*ctx
= (KDF_X942
*)vctx
;
373 static void *x942kdf_dup(void *vctx
)
375 const KDF_X942
*src
= (const KDF_X942
*)vctx
;
378 dest
= x942kdf_new(src
->provctx
);
380 if (!ossl_prov_memdup(src
->secret
, src
->secret_len
,
381 &dest
->secret
, &dest
->secret_len
)
382 || !ossl_prov_memdup(src
->acvpinfo
, src
->acvpinfo_len
,
383 &dest
->acvpinfo
, &dest
->acvpinfo_len
)
384 || !ossl_prov_memdup(src
->partyuinfo
, src
->partyuinfo_len
,
385 &dest
->partyuinfo
, &dest
->partyuinfo_len
)
386 || !ossl_prov_memdup(src
->partyvinfo
, src
->partyvinfo_len
,
387 &dest
->partyvinfo
, &dest
->partyvinfo_len
)
388 || !ossl_prov_memdup(src
->supp_pubinfo
, src
->supp_pubinfo_len
,
390 &dest
->supp_pubinfo_len
)
391 || !ossl_prov_memdup(src
->supp_privinfo
, src
->supp_privinfo_len
,
392 &dest
->supp_privinfo
,
393 &dest
->supp_privinfo_len
)
394 || !ossl_prov_digest_copy(&dest
->digest
, &src
->digest
))
396 dest
->cek_oid
= src
->cek_oid
;
397 dest
->cek_oid_len
= src
->cek_oid_len
;
398 dest
->dkm_len
= src
->dkm_len
;
399 dest
->use_keybits
= src
->use_keybits
;
408 static int x942kdf_set_buffer(unsigned char **out
, size_t *out_len
,
411 if (p
->data_size
== 0 || p
->data
== NULL
)
416 return OSSL_PARAM_get_octet_string(p
, (void **)out
, 0, out_len
);
419 static size_t x942kdf_size(KDF_X942
*ctx
)
422 const EVP_MD
*md
= ossl_prov_digest_md(&ctx
->digest
);
425 ERR_raise(ERR_LIB_PROV
, PROV_R_MISSING_MESSAGE_DIGEST
);
428 len
= EVP_MD_get_size(md
);
429 return (len
<= 0) ? 0 : (size_t)len
;
432 static int x942kdf_derive(void *vctx
, unsigned char *key
, size_t keylen
,
433 const OSSL_PARAM params
[])
435 KDF_X942
*ctx
= (KDF_X942
*)vctx
;
439 unsigned char *der
= NULL
;
442 if (!ossl_prov_is_running() || !x942kdf_set_ctx_params(ctx
, params
))
446 * These 2 options encode to the same field so only one of them should be
449 if (ctx
->use_keybits
&& ctx
->supp_pubinfo
!= NULL
) {
450 ERR_raise(ERR_LIB_PROV
, PROV_R_INVALID_PUBINFO
);
454 * If the blob of acvp data is used then the individual info fields that it
455 * replaces should not also be defined.
457 if (ctx
->acvpinfo
!= NULL
458 && (ctx
->partyuinfo
!= NULL
459 || ctx
->partyvinfo
!= NULL
460 || ctx
->supp_pubinfo
!= NULL
461 || ctx
->supp_privinfo
!= NULL
)) {
462 ERR_raise(ERR_LIB_PROV
, PROV_R_INVALID_DATA
);
465 if (ctx
->secret
== NULL
) {
466 ERR_raise(ERR_LIB_PROV
, PROV_R_MISSING_SECRET
);
469 md
= ossl_prov_digest_md(&ctx
->digest
);
471 ERR_raise(ERR_LIB_PROV
, PROV_R_MISSING_MESSAGE_DIGEST
);
474 if (ctx
->cek_oid
== NULL
|| ctx
->cek_oid_len
== 0) {
475 ERR_raise(ERR_LIB_PROV
, PROV_R_MISSING_CEK_ALG
);
478 if (ctx
->partyuinfo
!= NULL
&& ctx
->partyuinfo_len
>= X942KDF_MAX_INLEN
) {
480 * Note the ukm length MUST be 512 bits if it is used.
481 * For backwards compatibility the old check is being done.
483 ERR_raise(ERR_LIB_PROV
, PROV_R_INVALID_UKM_LENGTH
);
486 /* generate the otherinfo der */
487 if (!x942_encode_otherinfo(ctx
->use_keybits
? ctx
->dkm_len
: 0,
488 ctx
->cek_oid
, ctx
->cek_oid_len
,
489 ctx
->acvpinfo
, ctx
->acvpinfo_len
,
490 ctx
->partyuinfo
, ctx
->partyuinfo_len
,
491 ctx
->partyvinfo
, ctx
->partyvinfo_len
,
492 ctx
->supp_pubinfo
, ctx
->supp_pubinfo_len
,
493 ctx
->supp_privinfo
, ctx
->supp_privinfo_len
,
494 &der
, &der_len
, &ctr
)) {
495 ERR_raise(ERR_LIB_PROV
, PROV_R_BAD_ENCODING
);
498 ret
= x942kdf_hash_kdm(md
, ctx
->secret
, ctx
->secret_len
,
499 der
, der_len
, ctr
, key
, keylen
);
504 static int x942kdf_set_ctx_params(void *vctx
, const OSSL_PARAM params
[])
506 const OSSL_PARAM
*p
, *pq
;
507 KDF_X942
*ctx
= vctx
;
508 OSSL_LIB_CTX
*provctx
= PROV_LIBCTX_OF(ctx
->provctx
);
509 const char *propq
= NULL
;
514 if (!ossl_prov_digest_load_from_params(&ctx
->digest
, params
, provctx
))
517 p
= OSSL_PARAM_locate_const(params
, OSSL_KDF_PARAM_SECRET
);
519 p
= OSSL_PARAM_locate_const(params
, OSSL_KDF_PARAM_KEY
);
520 if (p
!= NULL
&& !x942kdf_set_buffer(&ctx
->secret
, &ctx
->secret_len
, p
))
523 p
= OSSL_PARAM_locate_const(params
, OSSL_KDF_PARAM_X942_ACVPINFO
);
525 && !x942kdf_set_buffer(&ctx
->acvpinfo
, &ctx
->acvpinfo_len
, p
))
528 p
= OSSL_PARAM_locate_const(params
, OSSL_KDF_PARAM_X942_PARTYUINFO
);
530 p
= OSSL_PARAM_locate_const(params
, OSSL_KDF_PARAM_UKM
);
532 && !x942kdf_set_buffer(&ctx
->partyuinfo
, &ctx
->partyuinfo_len
, p
))
535 p
= OSSL_PARAM_locate_const(params
, OSSL_KDF_PARAM_X942_PARTYVINFO
);
537 && !x942kdf_set_buffer(&ctx
->partyvinfo
, &ctx
->partyvinfo_len
, p
))
540 p
= OSSL_PARAM_locate_const(params
, OSSL_KDF_PARAM_X942_USE_KEYBITS
);
541 if (p
!= NULL
&& !OSSL_PARAM_get_int(p
, &ctx
->use_keybits
))
544 p
= OSSL_PARAM_locate_const(params
, OSSL_KDF_PARAM_X942_SUPP_PUBINFO
);
546 if (!x942kdf_set_buffer(&ctx
->supp_pubinfo
, &ctx
->supp_pubinfo_len
, p
))
548 ctx
->use_keybits
= 0;
551 p
= OSSL_PARAM_locate_const(params
, OSSL_KDF_PARAM_X942_SUPP_PRIVINFO
);
553 && !x942kdf_set_buffer(&ctx
->supp_privinfo
, &ctx
->supp_privinfo_len
, p
))
556 p
= OSSL_PARAM_locate_const(params
, OSSL_KDF_PARAM_CEK_ALG
);
558 if (p
->data_type
!= OSSL_PARAM_UTF8_STRING
)
560 pq
= OSSL_PARAM_locate_const(params
, OSSL_ALG_PARAM_PROPERTIES
);
562 * We already grab the properties during ossl_prov_digest_load_from_params()
563 * so there is no need to check the validity again..
567 if (find_alg_id(provctx
, p
->data
, propq
, &id
) == 0)
569 ctx
->cek_oid
= kek_algs
[id
].oid
;
570 ctx
->cek_oid_len
= kek_algs
[id
].oid_len
;
571 ctx
->dkm_len
= kek_algs
[id
].keklen
;
576 static const OSSL_PARAM
*x942kdf_settable_ctx_params(ossl_unused
void *ctx
,
577 ossl_unused
void *provctx
)
579 static const OSSL_PARAM known_settable_ctx_params
[] = {
580 OSSL_PARAM_utf8_string(OSSL_KDF_PARAM_PROPERTIES
, NULL
, 0),
581 OSSL_PARAM_utf8_string(OSSL_KDF_PARAM_DIGEST
, NULL
, 0),
582 OSSL_PARAM_octet_string(OSSL_KDF_PARAM_SECRET
, NULL
, 0),
583 OSSL_PARAM_octet_string(OSSL_KDF_PARAM_KEY
, NULL
, 0),
584 OSSL_PARAM_octet_string(OSSL_KDF_PARAM_UKM
, NULL
, 0),
585 OSSL_PARAM_octet_string(OSSL_KDF_PARAM_X942_ACVPINFO
, NULL
, 0),
586 OSSL_PARAM_octet_string(OSSL_KDF_PARAM_X942_PARTYUINFO
, NULL
, 0),
587 OSSL_PARAM_octet_string(OSSL_KDF_PARAM_X942_PARTYVINFO
, NULL
, 0),
588 OSSL_PARAM_octet_string(OSSL_KDF_PARAM_X942_SUPP_PUBINFO
, NULL
, 0),
589 OSSL_PARAM_octet_string(OSSL_KDF_PARAM_X942_SUPP_PRIVINFO
, NULL
, 0),
590 OSSL_PARAM_int(OSSL_KDF_PARAM_X942_USE_KEYBITS
, NULL
),
591 OSSL_PARAM_utf8_string(OSSL_KDF_PARAM_CEK_ALG
, NULL
, 0),
594 return known_settable_ctx_params
;
597 static int x942kdf_get_ctx_params(void *vctx
, OSSL_PARAM params
[])
599 KDF_X942
*ctx
= (KDF_X942
*)vctx
;
602 if ((p
= OSSL_PARAM_locate(params
, OSSL_KDF_PARAM_SIZE
)) != NULL
)
603 return OSSL_PARAM_set_size_t(p
, x942kdf_size(ctx
));
607 static const OSSL_PARAM
*x942kdf_gettable_ctx_params(ossl_unused
void *ctx
,
608 ossl_unused
void *provctx
)
610 static const OSSL_PARAM known_gettable_ctx_params
[] = {
611 OSSL_PARAM_size_t(OSSL_KDF_PARAM_SIZE
, NULL
),
614 return known_gettable_ctx_params
;
617 const OSSL_DISPATCH ossl_kdf_x942_kdf_functions
[] = {
618 { OSSL_FUNC_KDF_NEWCTX
, (void(*)(void))x942kdf_new
},
619 { OSSL_FUNC_KDF_DUPCTX
, (void(*)(void))x942kdf_dup
},
620 { OSSL_FUNC_KDF_FREECTX
, (void(*)(void))x942kdf_free
},
621 { OSSL_FUNC_KDF_RESET
, (void(*)(void))x942kdf_reset
},
622 { OSSL_FUNC_KDF_DERIVE
, (void(*)(void))x942kdf_derive
},
623 { OSSL_FUNC_KDF_SETTABLE_CTX_PARAMS
,
624 (void(*)(void))x942kdf_settable_ctx_params
},
625 { OSSL_FUNC_KDF_SET_CTX_PARAMS
, (void(*)(void))x942kdf_set_ctx_params
},
626 { OSSL_FUNC_KDF_GETTABLE_CTX_PARAMS
,
627 (void(*)(void))x942kdf_gettable_ctx_params
},
628 { OSSL_FUNC_KDF_GET_CTX_PARAMS
, (void(*)(void))x942kdf_get_ctx_params
},