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 "internal/asn1_int.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)) == NULL) {
123 DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR);
127 if ((public_key = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL) {
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)) == 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);
143 ASN1_INTEGER_free(public_key);
149 static int dh_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
153 unsigned char *penc = NULL;
156 ASN1_INTEGER *pub_key = NULL;
160 str = ASN1_STRING_new();
162 DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
165 str->length = i2d_dhp(pkey, dh, &str->data);
166 if (str->length <= 0) {
167 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, str, penc, penclen))
191 ASN1_STRING_free(str);
197 * PKCS#8 DH is defined in PKCS#11 of all places. It is similar to DH in that
198 * the AlgorithmIdentifier contains the parameters, the private key is
199 * explcitly included and the pubkey must be recalculated.
202 static int dh_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
204 const unsigned char *p, *pm;
210 ASN1_INTEGER *privkey = NULL;
214 if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
217 X509_ALGOR_get0(NULL, &ptype, &pval, palg);
219 if (ptype != V_ASN1_SEQUENCE)
221 if ((privkey = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL)
226 pmlen = pstr->length;
227 if ((dh = d2i_dhp(pkey, &pm, pmlen)) == NULL)
230 /* We have parameters now set private key */
231 if ((dh->priv_key = ASN1_INTEGER_to_BN(privkey, NULL)) == NULL) {
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();
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 void update_buflen(const BIGNUM *b, size_t *pbuflen)
305 if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
309 static int dh_param_decode(EVP_PKEY *pkey,
310 const unsigned char **pder, int derlen)
314 if ((dh = d2i_dhp(pkey, pder, derlen)) == NULL) {
315 DHerr(DH_F_DH_PARAM_DECODE, ERR_R_DH_LIB);
318 EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh);
322 static int dh_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
324 return i2d_dhp(pkey, pkey->pkey.dh, pder);
327 static int do_dh_print(BIO *bp, const DH *x, int indent,
328 ASN1_PCTX *ctx, int ptype)
330 unsigned char *m = NULL;
331 int reason = ERR_R_BUF_LIB;
334 const char *ktype = NULL;
336 BIGNUM *priv_key, *pub_key;
339 priv_key = x->priv_key;
344 pub_key = x->pub_key;
348 update_buflen(x->p, &buf_len);
351 reason = ERR_R_PASSED_NULL_PARAMETER;
355 update_buflen(x->g, &buf_len);
356 update_buflen(x->q, &buf_len);
357 update_buflen(x->j, &buf_len);
358 update_buflen(x->counter, &buf_len);
359 update_buflen(pub_key, &buf_len);
360 update_buflen(priv_key, &buf_len);
363 ktype = "DH Private-Key";
365 ktype = "DH Public-Key";
367 ktype = "DH Parameters";
369 m = OPENSSL_malloc(buf_len + 10);
371 reason = ERR_R_MALLOC_FAILURE;
375 BIO_indent(bp, indent, 128);
376 if (BIO_printf(bp, "%s: (%d bit)\n", ktype, BN_num_bits(x->p)) <= 0)
380 if (!ASN1_bn_print(bp, "private-key:", priv_key, m, indent))
382 if (!ASN1_bn_print(bp, "public-key:", pub_key, m, indent))
385 if (!ASN1_bn_print(bp, "prime:", x->p, m, indent))
387 if (!ASN1_bn_print(bp, "generator:", x->g, m, indent))
389 if (x->q && !ASN1_bn_print(bp, "subgroup order:", x->q, m, indent))
391 if (x->j && !ASN1_bn_print(bp, "subgroup factor:", x->j, m, indent))
395 BIO_indent(bp, indent, 128);
396 BIO_puts(bp, "seed:");
397 for (i = 0; i < x->seedlen; i++) {
399 if (BIO_puts(bp, "\n") <= 0
400 || !BIO_indent(bp, indent + 4, 128))
403 if (BIO_printf(bp, "%02x%s", x->seed[i],
404 ((i + 1) == x->seedlen) ? "" : ":") <= 0)
407 if (BIO_write(bp, "\n", 1) <= 0)
410 if (x->counter && !ASN1_bn_print(bp, "counter:", x->counter, m, indent))
412 if (x->length != 0) {
413 BIO_indent(bp, indent, 128);
414 if (BIO_printf(bp, "recommended-private-length: %d bits\n",
415 (int)x->length) <= 0)
423 DHerr(DH_F_DO_DH_PRINT, reason);
428 static int int_dh_size(const EVP_PKEY *pkey)
430 return (DH_size(pkey->pkey.dh));
433 static int dh_bits(const EVP_PKEY *pkey)
435 return BN_num_bits(pkey->pkey.dh->p);
438 static int dh_security_bits(const EVP_PKEY *pkey)
440 return DH_security_bits(pkey->pkey.dh);
443 static int dh_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
445 if (BN_cmp(a->pkey.dh->p, b->pkey.dh->p) ||
446 BN_cmp(a->pkey.dh->g, b->pkey.dh->g))
448 else if (a->ameth == &dhx_asn1_meth) {
449 if (BN_cmp(a->pkey.dh->q, b->pkey.dh->q))
455 static int int_dh_bn_cpy(BIGNUM **dst, const BIGNUM *src)
469 static int int_dh_param_copy(DH *to, const DH *from, int is_x942)
472 is_x942 = ! !from->q;
473 if (!int_dh_bn_cpy(&to->p, from->p))
475 if (!int_dh_bn_cpy(&to->g, from->g))
478 if (!int_dh_bn_cpy(&to->q, from->q))
480 if (!int_dh_bn_cpy(&to->j, from->j))
482 OPENSSL_free(to->seed);
486 to->seed = BUF_memdup(from->seed, from->seedlen);
489 to->seedlen = from->seedlen;
492 to->length = from->length;
496 DH *DHparams_dup(DH *dh)
502 if (!int_dh_param_copy(ret, dh, -1)) {
509 static int dh_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
511 return int_dh_param_copy(to->pkey.dh, from->pkey.dh,
512 from->ameth == &dhx_asn1_meth);
515 static int dh_missing_parameters(const EVP_PKEY *a)
517 if (!a->pkey.dh->p || !a->pkey.dh->g)
522 static int dh_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
524 if (dh_cmp_parameters(a, b) == 0)
526 if (BN_cmp(b->pkey.dh->pub_key, a->pkey.dh->pub_key) != 0)
532 static int dh_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
535 return do_dh_print(bp, pkey->pkey.dh, indent, ctx, 0);
538 static int dh_public_print(BIO *bp, const EVP_PKEY *pkey, int indent,
541 return do_dh_print(bp, pkey->pkey.dh, indent, ctx, 1);
544 static int dh_private_print(BIO *bp, const EVP_PKEY *pkey, int indent,
547 return do_dh_print(bp, pkey->pkey.dh, indent, ctx, 2);
550 int DHparams_print(BIO *bp, const DH *x)
552 return do_dh_print(bp, x, 4, NULL, 0);
555 #ifndef OPENSSL_NO_CMS
556 static int dh_cms_decrypt(CMS_RecipientInfo *ri);
557 static int dh_cms_encrypt(CMS_RecipientInfo *ri);
560 static int dh_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
563 #ifndef OPENSSL_NO_CMS
565 case ASN1_PKEY_CTRL_CMS_ENVELOPE:
567 return dh_cms_decrypt(arg2);
569 return dh_cms_encrypt(arg2);
572 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
573 *(int *)arg2 = CMS_RECIPINFO_AGREE;
582 const EVP_PKEY_ASN1_METHOD dh_asn1_meth = {
588 "OpenSSL PKCS#3 DH method",
605 dh_missing_parameters,
615 const EVP_PKEY_ASN1_METHOD dhx_asn1_meth = {
621 "OpenSSL X9.42 DH method",
638 dh_missing_parameters,
648 #ifndef OPENSSL_NO_CMS
650 static int dh_cms_set_peerkey(EVP_PKEY_CTX *pctx,
651 X509_ALGOR *alg, ASN1_BIT_STRING *pubkey)
656 ASN1_INTEGER *public_key = NULL;
658 EVP_PKEY *pkpeer = NULL, *pk = NULL;
660 const unsigned char *p;
663 X509_ALGOR_get0(&aoid, &atype, &aval, alg);
664 if (OBJ_obj2nid(aoid) != NID_dhpublicnumber)
666 /* Only absent parameters allowed in RFC XXXX */
667 if (atype != V_ASN1_UNDEF && atype == V_ASN1_NULL)
670 pk = EVP_PKEY_CTX_get0_pkey(pctx);
673 if (pk->type != EVP_PKEY_DHX)
675 /* Get parameters from parent key */
676 dhpeer = DHparams_dup(pk->pkey.dh);
677 /* We have parameters now set public key */
678 plen = ASN1_STRING_length(pubkey);
679 p = ASN1_STRING_data(pubkey);
683 if ((public_key = d2i_ASN1_INTEGER(NULL, &p, plen)) == NULL) {
684 DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_DECODE_ERROR);
688 /* We have parameters now set public key */
689 if ((dhpeer->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) {
690 DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_BN_DECODE_ERROR);
694 pkpeer = EVP_PKEY_new();
697 EVP_PKEY_assign(pkpeer, pk->ameth->pkey_id, dhpeer);
699 if (EVP_PKEY_derive_set_peer(pctx, pkpeer) > 0)
702 ASN1_INTEGER_free(public_key);
703 EVP_PKEY_free(pkpeer);
708 static int dh_cms_set_shared_info(EVP_PKEY_CTX *pctx, CMS_RecipientInfo *ri)
712 X509_ALGOR *alg, *kekalg = NULL;
713 ASN1_OCTET_STRING *ukm;
714 const unsigned char *p;
715 unsigned char *dukm = NULL;
718 const EVP_CIPHER *kekcipher;
719 EVP_CIPHER_CTX *kekctx;
721 if (!CMS_RecipientInfo_kari_get0_alg(ri, &alg, &ukm))
725 * For DH we only have one OID permissible. If ever any more get defined
726 * we will need something cleverer.
728 if (OBJ_obj2nid(alg->algorithm) != NID_id_smime_alg_ESDH) {
729 DHerr(DH_F_DH_CMS_SET_SHARED_INFO, DH_R_KDF_PARAMETER_ERROR);
733 if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, EVP_PKEY_DH_KDF_X9_42) <= 0)
736 if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, EVP_sha1()) <= 0)
739 if (alg->parameter->type != V_ASN1_SEQUENCE)
742 p = alg->parameter->value.sequence->data;
743 plen = alg->parameter->value.sequence->length;
744 kekalg = d2i_X509_ALGOR(NULL, &p, plen);
747 kekctx = CMS_RecipientInfo_kari_get0_ctx(ri);
750 kekcipher = EVP_get_cipherbyobj(kekalg->algorithm);
751 if (!kekcipher || EVP_CIPHER_mode(kekcipher) != EVP_CIPH_WRAP_MODE)
753 if (!EVP_EncryptInit_ex(kekctx, kekcipher, NULL, NULL, NULL))
755 if (EVP_CIPHER_asn1_to_param(kekctx, kekalg->parameter) <= 0)
758 keylen = EVP_CIPHER_CTX_key_length(kekctx);
759 if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0)
761 /* Use OBJ_nid2obj to ensure we use built in OID that isn't freed */
762 if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx,
763 OBJ_nid2obj(EVP_CIPHER_type(kekcipher)))
768 dukmlen = ASN1_STRING_length(ukm);
769 dukm = BUF_memdup(ASN1_STRING_data(ukm), dukmlen);
774 if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0)
780 X509_ALGOR_free(kekalg);
785 static int dh_cms_decrypt(CMS_RecipientInfo *ri)
788 pctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
791 /* See if we need to set peer key */
792 if (!EVP_PKEY_CTX_get0_peerkey(pctx)) {
794 ASN1_BIT_STRING *pubkey;
795 if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &alg, &pubkey,
800 if (!dh_cms_set_peerkey(pctx, alg, pubkey)) {
801 DHerr(DH_F_DH_CMS_DECRYPT, DH_R_PEER_KEY_ERROR);
805 /* Set DH derivation parameters and initialise unwrap context */
806 if (!dh_cms_set_shared_info(pctx, ri)) {
807 DHerr(DH_F_DH_CMS_DECRYPT, DH_R_SHARED_INFO_ERROR);
813 static int dh_cms_encrypt(CMS_RecipientInfo *ri)
819 X509_ALGOR *talg, *wrap_alg = NULL;
821 ASN1_BIT_STRING *pubkey;
822 ASN1_STRING *wrap_str;
823 ASN1_OCTET_STRING *ukm;
824 unsigned char *penc = NULL, *dukm = NULL;
828 int kdf_type, wrap_nid;
829 const EVP_MD *kdf_md;
830 pctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
833 /* Get ephemeral key */
834 pkey = EVP_PKEY_CTX_get0_pkey(pctx);
835 if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &talg, &pubkey,
838 X509_ALGOR_get0(&aoid, NULL, NULL, talg);
839 /* Is everything uninitialised? */
840 if (aoid == OBJ_nid2obj(NID_undef)) {
841 ASN1_INTEGER *pubk = BN_to_ASN1_INTEGER(pkey->pkey.dh->pub_key, NULL);
846 penclen = i2d_ASN1_INTEGER(pubk, &penc);
847 ASN1_INTEGER_free(pubk);
850 ASN1_STRING_set0(pubkey, penc, penclen);
851 pubkey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
852 pubkey->flags |= ASN1_STRING_FLAG_BITS_LEFT;
855 X509_ALGOR_set0(talg, OBJ_nid2obj(NID_dhpublicnumber),
859 /* See if custom paraneters set */
860 kdf_type = EVP_PKEY_CTX_get_dh_kdf_type(pctx);
863 if (!EVP_PKEY_CTX_get_dh_kdf_md(pctx, &kdf_md))
866 if (kdf_type == EVP_PKEY_DH_KDF_NONE) {
867 kdf_type = EVP_PKEY_DH_KDF_X9_42;
868 if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, kdf_type) <= 0)
870 } else if (kdf_type != EVP_PKEY_DH_KDF_X9_42)
873 if (kdf_md == NULL) {
874 /* Only SHA1 supported */
876 if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, kdf_md) <= 0)
878 } else if (EVP_MD_type(kdf_md) != NID_sha1)
879 /* Unsupported digest */
882 if (!CMS_RecipientInfo_kari_get0_alg(ri, &talg, &ukm))
886 ctx = CMS_RecipientInfo_kari_get0_ctx(ri);
887 wrap_nid = EVP_CIPHER_CTX_type(ctx);
888 if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx, OBJ_nid2obj(wrap_nid)) <= 0)
890 keylen = EVP_CIPHER_CTX_key_length(ctx);
892 /* Package wrap algorithm in an AlgorithmIdentifier */
894 wrap_alg = X509_ALGOR_new();
897 wrap_alg->algorithm = OBJ_nid2obj(wrap_nid);
898 wrap_alg->parameter = ASN1_TYPE_new();
899 if (!wrap_alg->parameter)
901 if (EVP_CIPHER_param_to_asn1(ctx, wrap_alg->parameter) <= 0)
903 if (ASN1_TYPE_get(wrap_alg->parameter) == NID_undef) {
904 ASN1_TYPE_free(wrap_alg->parameter);
905 wrap_alg->parameter = NULL;
908 if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0)
912 dukmlen = ASN1_STRING_length(ukm);
913 dukm = BUF_memdup(ASN1_STRING_data(ukm), dukmlen);
918 if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0)
923 * Now need to wrap encoding of wrap AlgorithmIdentifier into parameter
924 * of another AlgorithmIdentifier.
927 penclen = i2d_X509_ALGOR(wrap_alg, &penc);
928 if (!penc || !penclen)
930 wrap_str = ASN1_STRING_new();
933 ASN1_STRING_set0(wrap_str, penc, penclen);
935 X509_ALGOR_set0(talg, OBJ_nid2obj(NID_id_smime_alg_ESDH),
936 V_ASN1_SEQUENCE, wrap_str);
942 X509_ALGOR_free(wrap_alg);