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).
61 #include <openssl/x509.h>
62 #include <openssl/asn1.h>
63 #include <openssl/dh.h>
64 #include <openssl/bn.h>
65 #include "asn1_locl.h"
66 #ifndef OPENSSL_NO_CMS
67 # include <openssl/cms.h>
70 extern const EVP_PKEY_ASN1_METHOD dhx_asn1_meth;
73 * i2d/d2i like DH parameter functions which use the appropriate routine for
74 * PKCS#3 DH or X9.42 DH.
77 static DH *d2i_dhp(const EVP_PKEY *pkey, const unsigned char **pp,
80 if (pkey->ameth == &dhx_asn1_meth)
81 return d2i_DHxparams(NULL, pp, length);
82 return d2i_DHparams(NULL, pp, length);
85 static int i2d_dhp(const EVP_PKEY *pkey, const DH *a, unsigned char **pp)
87 if (pkey->ameth == &dhx_asn1_meth)
88 return i2d_DHxparams(a, pp);
89 return i2d_DHparams(a, pp);
92 static void int_dh_free(EVP_PKEY *pkey)
94 DH_free(pkey->pkey.dh);
97 static int dh_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
99 const unsigned char *p, *pm;
105 ASN1_INTEGER *public_key = NULL;
109 if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
111 X509_ALGOR_get0(NULL, &ptype, &pval, palg);
113 if (ptype != V_ASN1_SEQUENCE) {
114 DHerr(DH_F_DH_PUB_DECODE, DH_R_PARAMETER_ENCODING_ERROR);
120 pmlen = pstr->length;
122 if (!(dh = d2i_dhp(pkey, &pm, pmlen))) {
123 DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR);
127 if (!(public_key = d2i_ASN1_INTEGER(NULL, &p, pklen))) {
128 DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR);
132 /* We have parameters now set public key */
133 if (!(dh->pub_key = ASN1_INTEGER_to_BN(public_key, NULL))) {
134 DHerr(DH_F_DH_PUB_DECODE, DH_R_BN_DECODE_ERROR);
138 ASN1_INTEGER_free(public_key);
139 EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh);
144 ASN1_INTEGER_free(public_key);
151 static int dh_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
156 unsigned char *penc = NULL;
159 ASN1_INTEGER *pub_key = NULL;
163 str = ASN1_STRING_new();
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);
170 ptype = V_ASN1_SEQUENCE;
172 pub_key = BN_to_ASN1_INTEGER(dh->pub_key, NULL);
176 penclen = i2d_ASN1_INTEGER(pub_key, &penc);
178 ASN1_INTEGER_free(pub_key);
181 DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
185 if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(pkey->ameth->pkey_id),
186 ptype, pval, penc, penclen))
193 ASN1_STRING_free(pval);
199 * PKCS#8 DH is defined in PKCS#11 of all places. It is similar to DH in that
200 * the AlgorithmIdentifier contains the parameters, the private key is
201 * explcitly included and the pubkey must be recalculated.
204 static int dh_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
206 const unsigned char *p, *pm;
212 ASN1_INTEGER *privkey = NULL;
216 if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
219 X509_ALGOR_get0(NULL, &ptype, &pval, palg);
221 if (ptype != V_ASN1_SEQUENCE)
224 if (!(privkey = d2i_ASN1_INTEGER(NULL, &p, pklen)))
229 pmlen = pstr->length;
230 if (!(dh = d2i_dhp(pkey, &pm, pmlen)))
232 /* We have parameters now set private key */
233 if (!(dh->priv_key = ASN1_INTEGER_to_BN(privkey, NULL))) {
234 DHerr(DH_F_DH_PRIV_DECODE, DH_R_BN_ERROR);
237 /* Calculate public key */
238 if (!DH_generate_key(dh))
241 EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh);
243 ASN1_STRING_clear_free(privkey);
248 DHerr(DH_F_DH_PRIV_DECODE, EVP_R_DECODE_ERROR);
251 ASN1_STRING_clear_free(privkey);
255 static int dh_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
257 ASN1_STRING *params = NULL;
258 ASN1_INTEGER *prkey = NULL;
259 unsigned char *dp = NULL;
262 params = ASN1_STRING_new();
265 DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
269 params->length = i2d_dhp(pkey, pkey->pkey.dh, ¶ms->data);
270 if (params->length <= 0) {
271 DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
274 params->type = V_ASN1_SEQUENCE;
276 /* Get private key into integer */
277 prkey = BN_to_ASN1_INTEGER(pkey->pkey.dh->priv_key, NULL);
280 DHerr(DH_F_DH_PRIV_ENCODE, DH_R_BN_ERROR);
284 dplen = i2d_ASN1_INTEGER(prkey, &dp);
286 ASN1_STRING_clear_free(prkey);
289 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0,
290 V_ASN1_SEQUENCE, params, dp, dplen))
299 ASN1_STRING_free(params);
301 ASN1_STRING_clear_free(prkey);
305 static void update_buflen(const BIGNUM *b, size_t *pbuflen)
310 if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
314 static int dh_param_decode(EVP_PKEY *pkey,
315 const unsigned char **pder, int derlen)
318 if (!(dh = d2i_dhp(pkey, pder, derlen))) {
319 DHerr(DH_F_DH_PARAM_DECODE, ERR_R_DH_LIB);
322 EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh);
326 static int dh_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
328 return i2d_dhp(pkey, pkey->pkey.dh, pder);
331 static int do_dh_print(BIO *bp, const DH *x, int indent,
332 ASN1_PCTX *ctx, int ptype)
334 unsigned char *m = NULL;
335 int reason = ERR_R_BUF_LIB, ret = 0;
338 const char *ktype = NULL;
340 BIGNUM *priv_key, *pub_key;
343 priv_key = x->priv_key;
348 pub_key = x->pub_key;
352 update_buflen(x->p, &buf_len);
355 reason = ERR_R_PASSED_NULL_PARAMETER;
359 update_buflen(x->g, &buf_len);
360 update_buflen(x->q, &buf_len);
361 update_buflen(x->j, &buf_len);
362 update_buflen(x->counter, &buf_len);
363 update_buflen(pub_key, &buf_len);
364 update_buflen(priv_key, &buf_len);
367 ktype = "DH Private-Key";
369 ktype = "DH Public-Key";
371 ktype = "DH Parameters";
373 m = OPENSSL_malloc(buf_len + 10);
375 reason = ERR_R_MALLOC_FAILURE;
379 BIO_indent(bp, indent, 128);
380 if (BIO_printf(bp, "%s: (%d bit)\n", ktype, BN_num_bits(x->p)) <= 0)
384 if (!ASN1_bn_print(bp, "private-key:", priv_key, m, indent))
386 if (!ASN1_bn_print(bp, "public-key:", pub_key, m, indent))
389 if (!ASN1_bn_print(bp, "prime:", x->p, m, indent))
391 if (!ASN1_bn_print(bp, "generator:", x->g, m, indent))
393 if (x->q && !ASN1_bn_print(bp, "subgroup order:", x->q, m, indent))
395 if (x->j && !ASN1_bn_print(bp, "subgroup factor:", x->j, m, indent))
399 BIO_indent(bp, indent, 128);
400 BIO_puts(bp, "seed:");
401 for (i = 0; i < x->seedlen; i++) {
403 if (BIO_puts(bp, "\n") <= 0
404 || !BIO_indent(bp, indent + 4, 128))
407 if (BIO_printf(bp, "%02x%s", x->seed[i],
408 ((i + 1) == x->seedlen) ? "" : ":") <= 0)
411 if (BIO_write(bp, "\n", 1) <= 0)
414 if (x->counter && !ASN1_bn_print(bp, "counter:", x->counter, m, indent))
416 if (x->length != 0) {
417 BIO_indent(bp, indent, 128);
418 if (BIO_printf(bp, "recommended-private-length: %d bits\n",
419 (int)x->length) <= 0)
426 DHerr(DH_F_DO_DH_PRINT, reason);
433 static int int_dh_size(const EVP_PKEY *pkey)
435 return (DH_size(pkey->pkey.dh));
438 static int dh_bits(const EVP_PKEY *pkey)
440 return BN_num_bits(pkey->pkey.dh->p);
443 static int dh_security_bits(const EVP_PKEY *pkey)
445 return DH_security_bits(pkey->pkey.dh);
448 static int dh_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
450 if (BN_cmp(a->pkey.dh->p, b->pkey.dh->p) ||
451 BN_cmp(a->pkey.dh->g, b->pkey.dh->g))
453 else if (a->ameth == &dhx_asn1_meth) {
454 if (BN_cmp(a->pkey.dh->q, b->pkey.dh->q))
460 static int int_dh_bn_cpy(BIGNUM **dst, const BIGNUM *src)
475 static int int_dh_param_copy(DH *to, const DH *from, int is_x942)
478 is_x942 = ! !from->q;
479 if (!int_dh_bn_cpy(&to->p, from->p))
481 if (!int_dh_bn_cpy(&to->g, from->g))
484 if (!int_dh_bn_cpy(&to->q, from->q))
486 if (!int_dh_bn_cpy(&to->j, from->j))
489 OPENSSL_free(to->seed);
494 to->seed = BUF_memdup(from->seed, from->seedlen);
497 to->seedlen = from->seedlen;
500 to->length = from->length;
504 DH *DHparams_dup(DH *dh)
510 if (!int_dh_param_copy(ret, dh, -1)) {
517 static int dh_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
519 return int_dh_param_copy(to->pkey.dh, from->pkey.dh,
520 from->ameth == &dhx_asn1_meth);
523 static int dh_missing_parameters(const EVP_PKEY *a)
525 if (!a->pkey.dh->p || !a->pkey.dh->g)
530 static int dh_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
532 if (dh_cmp_parameters(a, b) == 0)
534 if (BN_cmp(b->pkey.dh->pub_key, a->pkey.dh->pub_key) != 0)
540 static int dh_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
543 return do_dh_print(bp, pkey->pkey.dh, indent, ctx, 0);
546 static int dh_public_print(BIO *bp, const EVP_PKEY *pkey, int indent,
549 return do_dh_print(bp, pkey->pkey.dh, indent, ctx, 1);
552 static int dh_private_print(BIO *bp, const EVP_PKEY *pkey, int indent,
555 return do_dh_print(bp, pkey->pkey.dh, indent, ctx, 2);
558 int DHparams_print(BIO *bp, const DH *x)
560 return do_dh_print(bp, x, 4, NULL, 0);
563 #ifndef OPENSSL_NO_CMS
564 static int dh_cms_decrypt(CMS_RecipientInfo *ri);
565 static int dh_cms_encrypt(CMS_RecipientInfo *ri);
568 static int dh_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
571 #ifndef OPENSSL_NO_CMS
573 case ASN1_PKEY_CTRL_CMS_ENVELOPE:
575 return dh_cms_decrypt(arg2);
577 return dh_cms_encrypt(arg2);
580 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
581 *(int *)arg2 = CMS_RECIPINFO_AGREE;
590 const EVP_PKEY_ASN1_METHOD dh_asn1_meth = {
596 "OpenSSL PKCS#3 DH method",
613 dh_missing_parameters,
623 const EVP_PKEY_ASN1_METHOD dhx_asn1_meth = {
629 "OpenSSL X9.42 DH method",
646 dh_missing_parameters,
656 #ifndef OPENSSL_NO_CMS
658 static int dh_cms_set_peerkey(EVP_PKEY_CTX *pctx,
659 X509_ALGOR *alg, ASN1_BIT_STRING *pubkey)
664 ASN1_INTEGER *public_key = NULL;
666 EVP_PKEY *pkpeer = NULL, *pk = NULL;
668 const unsigned char *p;
671 X509_ALGOR_get0(&aoid, &atype, &aval, alg);
672 if (OBJ_obj2nid(aoid) != NID_dhpublicnumber)
674 /* Only absent parameters allowed in RFC XXXX */
675 if (atype != V_ASN1_UNDEF && atype == V_ASN1_NULL)
678 pk = EVP_PKEY_CTX_get0_pkey(pctx);
681 if (pk->type != EVP_PKEY_DHX)
683 /* Get parameters from parent key */
684 dhpeer = DHparams_dup(pk->pkey.dh);
685 /* We have parameters now set public key */
686 plen = ASN1_STRING_length(pubkey);
687 p = ASN1_STRING_data(pubkey);
691 if (!(public_key = d2i_ASN1_INTEGER(NULL, &p, plen))) {
692 DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_DECODE_ERROR);
696 /* We have parameters now set public key */
697 if (!(dhpeer->pub_key = ASN1_INTEGER_to_BN(public_key, NULL))) {
698 DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_BN_DECODE_ERROR);
702 pkpeer = EVP_PKEY_new();
705 EVP_PKEY_assign(pkpeer, pk->ameth->pkey_id, dhpeer);
707 if (EVP_PKEY_derive_set_peer(pctx, pkpeer) > 0)
711 ASN1_INTEGER_free(public_key);
713 EVP_PKEY_free(pkpeer);
719 static int dh_cms_set_shared_info(EVP_PKEY_CTX *pctx, CMS_RecipientInfo *ri)
723 X509_ALGOR *alg, *kekalg = NULL;
724 ASN1_OCTET_STRING *ukm;
725 const unsigned char *p;
726 unsigned char *dukm = NULL;
729 const EVP_CIPHER *kekcipher;
730 EVP_CIPHER_CTX *kekctx;
732 if (!CMS_RecipientInfo_kari_get0_alg(ri, &alg, &ukm))
736 * For DH we only have one OID permissible. If ever any more get defined
737 * we will need something cleverer.
739 if (OBJ_obj2nid(alg->algorithm) != NID_id_smime_alg_ESDH) {
740 DHerr(DH_F_DH_CMS_SET_SHARED_INFO, DH_R_KDF_PARAMETER_ERROR);
744 if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, EVP_PKEY_DH_KDF_X9_42) <= 0)
747 if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, EVP_sha1()) <= 0)
750 if (alg->parameter->type != V_ASN1_SEQUENCE)
753 p = alg->parameter->value.sequence->data;
754 plen = alg->parameter->value.sequence->length;
755 kekalg = d2i_X509_ALGOR(NULL, &p, plen);
758 kekctx = CMS_RecipientInfo_kari_get0_ctx(ri);
761 kekcipher = EVP_get_cipherbyobj(kekalg->algorithm);
762 if (!kekcipher || EVP_CIPHER_mode(kekcipher) != EVP_CIPH_WRAP_MODE)
764 if (!EVP_EncryptInit_ex(kekctx, kekcipher, NULL, NULL, NULL))
766 if (EVP_CIPHER_asn1_to_param(kekctx, kekalg->parameter) <= 0)
769 keylen = EVP_CIPHER_CTX_key_length(kekctx);
770 if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0)
772 /* Use OBJ_nid2obj to ensure we use built in OID that isn't freed */
773 if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx,
774 OBJ_nid2obj(EVP_CIPHER_type(kekcipher)))
779 dukmlen = ASN1_STRING_length(ukm);
780 dukm = BUF_memdup(ASN1_STRING_data(ukm), dukmlen);
785 if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0)
792 X509_ALGOR_free(kekalg);
798 static int dh_cms_decrypt(CMS_RecipientInfo *ri)
801 pctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
804 /* See if we need to set peer key */
805 if (!EVP_PKEY_CTX_get0_peerkey(pctx)) {
807 ASN1_BIT_STRING *pubkey;
808 if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &alg, &pubkey,
813 if (!dh_cms_set_peerkey(pctx, alg, pubkey)) {
814 DHerr(DH_F_DH_CMS_DECRYPT, DH_R_PEER_KEY_ERROR);
818 /* Set DH derivation parameters and initialise unwrap context */
819 if (!dh_cms_set_shared_info(pctx, ri)) {
820 DHerr(DH_F_DH_CMS_DECRYPT, DH_R_SHARED_INFO_ERROR);
826 static int dh_cms_encrypt(CMS_RecipientInfo *ri)
832 X509_ALGOR *talg, *wrap_alg = NULL;
834 ASN1_BIT_STRING *pubkey;
835 ASN1_STRING *wrap_str;
836 ASN1_OCTET_STRING *ukm;
837 unsigned char *penc = NULL, *dukm = NULL;
841 int kdf_type, wrap_nid;
842 const EVP_MD *kdf_md;
843 pctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
846 /* Get ephemeral key */
847 pkey = EVP_PKEY_CTX_get0_pkey(pctx);
848 if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &talg, &pubkey,
851 X509_ALGOR_get0(&aoid, NULL, NULL, talg);
852 /* Is everything uninitialised? */
853 if (aoid == OBJ_nid2obj(NID_undef)) {
855 pubk = BN_to_ASN1_INTEGER(pkey->pkey.dh->pub_key, NULL);
860 penclen = i2d_ASN1_INTEGER(pubk, &penc);
861 ASN1_INTEGER_free(pubk);
864 ASN1_STRING_set0(pubkey, penc, penclen);
865 pubkey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
866 pubkey->flags |= ASN1_STRING_FLAG_BITS_LEFT;
869 X509_ALGOR_set0(talg, OBJ_nid2obj(NID_dhpublicnumber),
873 /* See if custom paraneters set */
874 kdf_type = EVP_PKEY_CTX_get_dh_kdf_type(pctx);
877 if (!EVP_PKEY_CTX_get_dh_kdf_md(pctx, &kdf_md))
880 if (kdf_type == EVP_PKEY_DH_KDF_NONE) {
881 kdf_type = EVP_PKEY_DH_KDF_X9_42;
882 if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, kdf_type) <= 0)
884 } else if (kdf_type != EVP_PKEY_DH_KDF_X9_42)
887 if (kdf_md == NULL) {
888 /* Only SHA1 supported */
890 if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, kdf_md) <= 0)
892 } else if (EVP_MD_type(kdf_md) != NID_sha1)
893 /* Unsupported digest */
896 if (!CMS_RecipientInfo_kari_get0_alg(ri, &talg, &ukm))
900 ctx = CMS_RecipientInfo_kari_get0_ctx(ri);
901 wrap_nid = EVP_CIPHER_CTX_type(ctx);
902 if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx, OBJ_nid2obj(wrap_nid)) <= 0)
904 keylen = EVP_CIPHER_CTX_key_length(ctx);
906 /* Package wrap algorithm in an AlgorithmIdentifier */
908 wrap_alg = X509_ALGOR_new();
911 wrap_alg->algorithm = OBJ_nid2obj(wrap_nid);
912 wrap_alg->parameter = ASN1_TYPE_new();
913 if (!wrap_alg->parameter)
915 if (EVP_CIPHER_param_to_asn1(ctx, wrap_alg->parameter) <= 0)
917 if (ASN1_TYPE_get(wrap_alg->parameter) == NID_undef) {
918 ASN1_TYPE_free(wrap_alg->parameter);
919 wrap_alg->parameter = NULL;
922 if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0)
926 dukmlen = ASN1_STRING_length(ukm);
927 dukm = BUF_memdup(ASN1_STRING_data(ukm), dukmlen);
932 if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0)
937 * Now need to wrap encoding of wrap AlgorithmIdentifier into parameter
938 * of another AlgorithmIdentifier.
941 penclen = i2d_X509_ALGOR(wrap_alg, &penc);
942 if (!penc || !penclen)
944 wrap_str = ASN1_STRING_new();
947 ASN1_STRING_set0(wrap_str, penc, penclen);
949 X509_ALGOR_set0(talg, OBJ_nid2obj(NID_id_smime_alg_ESDH),
950 V_ASN1_SEQUENCE, wrap_str);
958 X509_ALGOR_free(wrap_alg);