2 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
5 /* ====================================================================
6 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
60 #include "internal/cryptlib.h"
61 #include <openssl/x509.h>
62 #include <openssl/asn1.h>
63 #include <openssl/dh.h>
64 #include <openssl/bn.h>
65 #include "internal/asn1_int.h"
66 #include "internal/evp_int.h"
67 #ifndef OPENSSL_NO_CMS
68 # include <openssl/cms.h>
72 * i2d/d2i like DH parameter functions which use the appropriate routine for
73 * PKCS#3 DH or X9.42 DH.
76 static DH *d2i_dhp(const EVP_PKEY *pkey, const unsigned char **pp,
79 if (pkey->ameth == &dhx_asn1_meth)
80 return d2i_DHxparams(NULL, pp, length);
81 return d2i_DHparams(NULL, pp, length);
84 static int i2d_dhp(const EVP_PKEY *pkey, const DH *a, unsigned char **pp)
86 if (pkey->ameth == &dhx_asn1_meth)
87 return i2d_DHxparams(a, pp);
88 return i2d_DHparams(a, pp);
91 static void int_dh_free(EVP_PKEY *pkey)
93 DH_free(pkey->pkey.dh);
96 static int dh_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
98 const unsigned char *p, *pm;
104 ASN1_INTEGER *public_key = NULL;
108 if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
110 X509_ALGOR_get0(NULL, &ptype, &pval, palg);
112 if (ptype != V_ASN1_SEQUENCE) {
113 DHerr(DH_F_DH_PUB_DECODE, DH_R_PARAMETER_ENCODING_ERROR);
119 pmlen = pstr->length;
121 if ((dh = d2i_dhp(pkey, &pm, pmlen)) == NULL) {
122 DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR);
126 if ((public_key = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL) {
127 DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR);
131 /* We have parameters now set public key */
132 if ((dh->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) {
133 DHerr(DH_F_DH_PUB_DECODE, DH_R_BN_DECODE_ERROR);
137 ASN1_INTEGER_free(public_key);
138 EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh);
142 ASN1_INTEGER_free(public_key);
148 static int dh_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
152 unsigned char *penc = NULL;
155 ASN1_INTEGER *pub_key = NULL;
159 str = ASN1_STRING_new();
161 DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
164 str->length = i2d_dhp(pkey, dh, &str->data);
165 if (str->length <= 0) {
166 DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
169 ptype = V_ASN1_SEQUENCE;
171 pub_key = BN_to_ASN1_INTEGER(dh->pub_key, NULL);
175 penclen = i2d_ASN1_INTEGER(pub_key, &penc);
177 ASN1_INTEGER_free(pub_key);
180 DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
184 if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(pkey->ameth->pkey_id),
185 ptype, str, penc, penclen))
190 ASN1_STRING_free(str);
196 * PKCS#8 DH is defined in PKCS#11 of all places. It is similar to DH in that
197 * the AlgorithmIdentifier contains the parameters, the private key is
198 * explicitly included and the pubkey must be recalculated.
201 static int dh_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
203 const unsigned char *p, *pm;
209 ASN1_INTEGER *privkey = NULL;
213 if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
216 X509_ALGOR_get0(NULL, &ptype, &pval, palg);
218 if (ptype != V_ASN1_SEQUENCE)
220 if ((privkey = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL)
225 pmlen = pstr->length;
226 if ((dh = d2i_dhp(pkey, &pm, pmlen)) == NULL)
229 /* We have parameters now set private key */
230 if ((dh->priv_key = BN_secure_new()) == NULL
231 || !ASN1_INTEGER_to_BN(privkey, dh->priv_key)) {
232 DHerr(DH_F_DH_PRIV_DECODE, DH_R_BN_ERROR);
235 /* Calculate public key */
236 if (!DH_generate_key(dh))
239 EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh);
241 ASN1_STRING_clear_free(privkey);
246 DHerr(DH_F_DH_PRIV_DECODE, EVP_R_DECODE_ERROR);
249 ASN1_STRING_clear_free(privkey);
253 static int dh_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
255 ASN1_STRING *params = NULL;
256 ASN1_INTEGER *prkey = NULL;
257 unsigned char *dp = NULL;
260 params = ASN1_STRING_new();
262 if (params == NULL) {
263 DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
267 params->length = i2d_dhp(pkey, pkey->pkey.dh, ¶ms->data);
268 if (params->length <= 0) {
269 DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
272 params->type = V_ASN1_SEQUENCE;
274 /* Get private key into integer */
275 prkey = BN_to_ASN1_INTEGER(pkey->pkey.dh->priv_key, NULL);
278 DHerr(DH_F_DH_PRIV_ENCODE, DH_R_BN_ERROR);
282 dplen = i2d_ASN1_INTEGER(prkey, &dp);
284 ASN1_STRING_clear_free(prkey);
287 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0,
288 V_ASN1_SEQUENCE, params, dp, dplen))
295 ASN1_STRING_free(params);
296 ASN1_STRING_clear_free(prkey);
300 static int dh_param_decode(EVP_PKEY *pkey,
301 const unsigned char **pder, int derlen)
305 if ((dh = d2i_dhp(pkey, pder, derlen)) == NULL) {
306 DHerr(DH_F_DH_PARAM_DECODE, ERR_R_DH_LIB);
309 EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh);
313 static int dh_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
315 return i2d_dhp(pkey, pkey->pkey.dh, pder);
318 static int do_dh_print(BIO *bp, const DH *x, int indent, int ptype)
320 int reason = ERR_R_BUF_LIB;
321 const char *ktype = NULL;
322 BIGNUM *priv_key, *pub_key;
325 priv_key = x->priv_key;
330 pub_key = x->pub_key;
334 if (priv_key == NULL && pub_key == NULL) {
335 reason = ERR_R_PASSED_NULL_PARAMETER;
340 ktype = "DH Private-Key";
342 ktype = "DH Public-Key";
344 ktype = "DH Parameters";
346 BIO_indent(bp, indent, 128);
347 if (BIO_printf(bp, "%s: (%d bit)\n", ktype, BN_num_bits(x->p)) <= 0)
351 if (!ASN1_bn_print(bp, "private-key:", priv_key, NULL, indent))
353 if (!ASN1_bn_print(bp, "public-key:", pub_key, NULL, indent))
356 if (!ASN1_bn_print(bp, "prime:", x->p, NULL, indent))
358 if (!ASN1_bn_print(bp, "generator:", x->g, NULL, indent))
360 if (x->q && !ASN1_bn_print(bp, "subgroup order:", x->q, NULL, indent))
362 if (x->j && !ASN1_bn_print(bp, "subgroup factor:", x->j, NULL, indent))
366 BIO_indent(bp, indent, 128);
367 BIO_puts(bp, "seed:");
368 for (i = 0; i < x->seedlen; i++) {
370 if (BIO_puts(bp, "\n") <= 0
371 || !BIO_indent(bp, indent + 4, 128))
374 if (BIO_printf(bp, "%02x%s", x->seed[i],
375 ((i + 1) == x->seedlen) ? "" : ":") <= 0)
378 if (BIO_write(bp, "\n", 1) <= 0)
381 if (x->counter && !ASN1_bn_print(bp, "counter:", x->counter, NULL, indent))
383 if (x->length != 0) {
384 BIO_indent(bp, indent, 128);
385 if (BIO_printf(bp, "recommended-private-length: %d bits\n",
386 (int)x->length) <= 0)
393 DHerr(DH_F_DO_DH_PRINT, reason);
397 static int int_dh_size(const EVP_PKEY *pkey)
399 return (DH_size(pkey->pkey.dh));
402 static int dh_bits(const EVP_PKEY *pkey)
404 return BN_num_bits(pkey->pkey.dh->p);
407 static int dh_security_bits(const EVP_PKEY *pkey)
409 return DH_security_bits(pkey->pkey.dh);
412 static int dh_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
414 if (BN_cmp(a->pkey.dh->p, b->pkey.dh->p) ||
415 BN_cmp(a->pkey.dh->g, b->pkey.dh->g))
417 else if (a->ameth == &dhx_asn1_meth) {
418 if (BN_cmp(a->pkey.dh->q, b->pkey.dh->q))
424 static int int_dh_bn_cpy(BIGNUM **dst, const BIGNUM *src)
438 static int int_dh_param_copy(DH *to, const DH *from, int is_x942)
441 is_x942 = ! !from->q;
442 if (!int_dh_bn_cpy(&to->p, from->p))
444 if (!int_dh_bn_cpy(&to->g, from->g))
447 if (!int_dh_bn_cpy(&to->q, from->q))
449 if (!int_dh_bn_cpy(&to->j, from->j))
451 OPENSSL_free(to->seed);
455 to->seed = OPENSSL_memdup(from->seed, from->seedlen);
458 to->seedlen = from->seedlen;
461 to->length = from->length;
465 DH *DHparams_dup(DH *dh)
471 if (!int_dh_param_copy(ret, dh, -1)) {
478 static int dh_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
480 if (to->pkey.dh == NULL) {
481 to->pkey.dh = DH_new();
482 if (to->pkey.dh == NULL)
485 return int_dh_param_copy(to->pkey.dh, from->pkey.dh,
486 from->ameth == &dhx_asn1_meth);
489 static int dh_missing_parameters(const EVP_PKEY *a)
491 if (!a->pkey.dh->p || !a->pkey.dh->g)
496 static int dh_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
498 if (dh_cmp_parameters(a, b) == 0)
500 if (BN_cmp(b->pkey.dh->pub_key, a->pkey.dh->pub_key) != 0)
506 static int dh_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
509 return do_dh_print(bp, pkey->pkey.dh, indent, 0);
512 static int dh_public_print(BIO *bp, const EVP_PKEY *pkey, int indent,
515 return do_dh_print(bp, pkey->pkey.dh, indent, 1);
518 static int dh_private_print(BIO *bp, const EVP_PKEY *pkey, int indent,
521 return do_dh_print(bp, pkey->pkey.dh, indent, 2);
524 int DHparams_print(BIO *bp, const DH *x)
526 return do_dh_print(bp, x, 4, 0);
529 #ifndef OPENSSL_NO_CMS
530 static int dh_cms_decrypt(CMS_RecipientInfo *ri);
531 static int dh_cms_encrypt(CMS_RecipientInfo *ri);
534 static int dh_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
537 #ifndef OPENSSL_NO_CMS
539 case ASN1_PKEY_CTRL_CMS_ENVELOPE:
541 return dh_cms_decrypt(arg2);
543 return dh_cms_encrypt(arg2);
546 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
547 *(int *)arg2 = CMS_RECIPINFO_AGREE;
556 const EVP_PKEY_ASN1_METHOD dh_asn1_meth = {
562 "OpenSSL PKCS#3 DH method",
579 dh_missing_parameters,
589 const EVP_PKEY_ASN1_METHOD dhx_asn1_meth = {
595 "OpenSSL X9.42 DH method",
612 dh_missing_parameters,
622 #ifndef OPENSSL_NO_CMS
624 static int dh_cms_set_peerkey(EVP_PKEY_CTX *pctx,
625 X509_ALGOR *alg, ASN1_BIT_STRING *pubkey)
630 ASN1_INTEGER *public_key = NULL;
632 EVP_PKEY *pkpeer = NULL, *pk = NULL;
634 const unsigned char *p;
637 X509_ALGOR_get0(&aoid, &atype, &aval, alg);
638 if (OBJ_obj2nid(aoid) != NID_dhpublicnumber)
640 /* Only absent parameters allowed in RFC XXXX */
641 if (atype != V_ASN1_UNDEF && atype == V_ASN1_NULL)
644 pk = EVP_PKEY_CTX_get0_pkey(pctx);
647 if (pk->type != EVP_PKEY_DHX)
649 /* Get parameters from parent key */
650 dhpeer = DHparams_dup(pk->pkey.dh);
651 /* We have parameters now set public key */
652 plen = ASN1_STRING_length(pubkey);
653 p = ASN1_STRING_data(pubkey);
657 if ((public_key = d2i_ASN1_INTEGER(NULL, &p, plen)) == NULL) {
658 DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_DECODE_ERROR);
662 /* We have parameters now set public key */
663 if ((dhpeer->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) {
664 DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_BN_DECODE_ERROR);
668 pkpeer = EVP_PKEY_new();
671 EVP_PKEY_assign(pkpeer, pk->ameth->pkey_id, dhpeer);
673 if (EVP_PKEY_derive_set_peer(pctx, pkpeer) > 0)
676 ASN1_INTEGER_free(public_key);
677 EVP_PKEY_free(pkpeer);
682 static int dh_cms_set_shared_info(EVP_PKEY_CTX *pctx, CMS_RecipientInfo *ri)
686 X509_ALGOR *alg, *kekalg = NULL;
687 ASN1_OCTET_STRING *ukm;
688 const unsigned char *p;
689 unsigned char *dukm = NULL;
692 const EVP_CIPHER *kekcipher;
693 EVP_CIPHER_CTX *kekctx;
695 if (!CMS_RecipientInfo_kari_get0_alg(ri, &alg, &ukm))
699 * For DH we only have one OID permissible. If ever any more get defined
700 * we will need something cleverer.
702 if (OBJ_obj2nid(alg->algorithm) != NID_id_smime_alg_ESDH) {
703 DHerr(DH_F_DH_CMS_SET_SHARED_INFO, DH_R_KDF_PARAMETER_ERROR);
707 if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, EVP_PKEY_DH_KDF_X9_42) <= 0)
710 if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, EVP_sha1()) <= 0)
713 if (alg->parameter->type != V_ASN1_SEQUENCE)
716 p = alg->parameter->value.sequence->data;
717 plen = alg->parameter->value.sequence->length;
718 kekalg = d2i_X509_ALGOR(NULL, &p, plen);
721 kekctx = CMS_RecipientInfo_kari_get0_ctx(ri);
724 kekcipher = EVP_get_cipherbyobj(kekalg->algorithm);
725 if (!kekcipher || EVP_CIPHER_mode(kekcipher) != EVP_CIPH_WRAP_MODE)
727 if (!EVP_EncryptInit_ex(kekctx, kekcipher, NULL, NULL, NULL))
729 if (EVP_CIPHER_asn1_to_param(kekctx, kekalg->parameter) <= 0)
732 keylen = EVP_CIPHER_CTX_key_length(kekctx);
733 if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0)
735 /* Use OBJ_nid2obj to ensure we use built in OID that isn't freed */
736 if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx,
737 OBJ_nid2obj(EVP_CIPHER_type(kekcipher)))
742 dukmlen = ASN1_STRING_length(ukm);
743 dukm = OPENSSL_memdup(ASN1_STRING_data(ukm), dukmlen);
748 if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0)
754 X509_ALGOR_free(kekalg);
759 static int dh_cms_decrypt(CMS_RecipientInfo *ri)
762 pctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
765 /* See if we need to set peer key */
766 if (!EVP_PKEY_CTX_get0_peerkey(pctx)) {
768 ASN1_BIT_STRING *pubkey;
769 if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &alg, &pubkey,
774 if (!dh_cms_set_peerkey(pctx, alg, pubkey)) {
775 DHerr(DH_F_DH_CMS_DECRYPT, DH_R_PEER_KEY_ERROR);
779 /* Set DH derivation parameters and initialise unwrap context */
780 if (!dh_cms_set_shared_info(pctx, ri)) {
781 DHerr(DH_F_DH_CMS_DECRYPT, DH_R_SHARED_INFO_ERROR);
787 static int dh_cms_encrypt(CMS_RecipientInfo *ri)
793 X509_ALGOR *talg, *wrap_alg = NULL;
795 ASN1_BIT_STRING *pubkey;
796 ASN1_STRING *wrap_str;
797 ASN1_OCTET_STRING *ukm;
798 unsigned char *penc = NULL, *dukm = NULL;
802 int kdf_type, wrap_nid;
803 const EVP_MD *kdf_md;
804 pctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
807 /* Get ephemeral key */
808 pkey = EVP_PKEY_CTX_get0_pkey(pctx);
809 if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &talg, &pubkey,
812 X509_ALGOR_get0(&aoid, NULL, NULL, talg);
813 /* Is everything uninitialised? */
814 if (aoid == OBJ_nid2obj(NID_undef)) {
815 ASN1_INTEGER *pubk = BN_to_ASN1_INTEGER(pkey->pkey.dh->pub_key, NULL);
820 penclen = i2d_ASN1_INTEGER(pubk, &penc);
821 ASN1_INTEGER_free(pubk);
824 ASN1_STRING_set0(pubkey, penc, penclen);
825 pubkey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
826 pubkey->flags |= ASN1_STRING_FLAG_BITS_LEFT;
829 X509_ALGOR_set0(talg, OBJ_nid2obj(NID_dhpublicnumber),
833 /* See if custom parameters set */
834 kdf_type = EVP_PKEY_CTX_get_dh_kdf_type(pctx);
837 if (!EVP_PKEY_CTX_get_dh_kdf_md(pctx, &kdf_md))
840 if (kdf_type == EVP_PKEY_DH_KDF_NONE) {
841 kdf_type = EVP_PKEY_DH_KDF_X9_42;
842 if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, kdf_type) <= 0)
844 } else if (kdf_type != EVP_PKEY_DH_KDF_X9_42)
847 if (kdf_md == NULL) {
848 /* Only SHA1 supported */
850 if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, kdf_md) <= 0)
852 } else if (EVP_MD_type(kdf_md) != NID_sha1)
853 /* Unsupported digest */
856 if (!CMS_RecipientInfo_kari_get0_alg(ri, &talg, &ukm))
860 ctx = CMS_RecipientInfo_kari_get0_ctx(ri);
861 wrap_nid = EVP_CIPHER_CTX_type(ctx);
862 if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx, OBJ_nid2obj(wrap_nid)) <= 0)
864 keylen = EVP_CIPHER_CTX_key_length(ctx);
866 /* Package wrap algorithm in an AlgorithmIdentifier */
868 wrap_alg = X509_ALGOR_new();
869 if (wrap_alg == NULL)
871 wrap_alg->algorithm = OBJ_nid2obj(wrap_nid);
872 wrap_alg->parameter = ASN1_TYPE_new();
873 if (wrap_alg->parameter == NULL)
875 if (EVP_CIPHER_param_to_asn1(ctx, wrap_alg->parameter) <= 0)
877 if (ASN1_TYPE_get(wrap_alg->parameter) == NID_undef) {
878 ASN1_TYPE_free(wrap_alg->parameter);
879 wrap_alg->parameter = NULL;
882 if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0)
886 dukmlen = ASN1_STRING_length(ukm);
887 dukm = OPENSSL_memdup(ASN1_STRING_data(ukm), dukmlen);
892 if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0)
897 * Now need to wrap encoding of wrap AlgorithmIdentifier into parameter
898 * of another AlgorithmIdentifier.
901 penclen = i2d_X509_ALGOR(wrap_alg, &penc);
902 if (!penc || !penclen)
904 wrap_str = ASN1_STRING_new();
905 if (wrap_str == NULL)
907 ASN1_STRING_set0(wrap_str, penc, penclen);
909 X509_ALGOR_set0(talg, OBJ_nid2obj(NID_id_smime_alg_ESDH),
910 V_ASN1_SEQUENCE, wrap_str);
916 X509_ALGOR_free(wrap_alg);