2 * Copyright 2006-2016 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 * DH low level APIs are deprecated for public use, but still ok for
14 #include "internal/deprecated.h"
17 #include "internal/cryptlib.h"
18 #include <openssl/x509.h>
19 #include <openssl/asn1.h>
21 #include <openssl/bn.h>
22 #include "crypto/asn1.h"
23 #include "crypto/dh.h"
24 #include "crypto/evp.h"
25 #include <openssl/cms.h>
26 #include <openssl/core_names.h>
27 #include "internal/param_build.h"
30 * i2d/d2i like DH parameter functions which use the appropriate routine for
31 * PKCS#3 DH or X9.42 DH.
34 static DH *d2i_dhp(const EVP_PKEY *pkey, const unsigned char **pp,
37 if (pkey->ameth == &dhx_asn1_meth)
38 return d2i_DHxparams(NULL, pp, length);
39 return d2i_DHparams(NULL, pp, length);
42 static int i2d_dhp(const EVP_PKEY *pkey, const DH *a, unsigned char **pp)
44 if (pkey->ameth == &dhx_asn1_meth)
45 return i2d_DHxparams(a, pp);
46 return i2d_DHparams(a, pp);
49 static void int_dh_free(EVP_PKEY *pkey)
51 DH_free(pkey->pkey.dh);
54 static int dh_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
56 const unsigned char *p, *pm;
60 const ASN1_STRING *pstr;
62 ASN1_INTEGER *public_key = NULL;
66 if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
68 X509_ALGOR_get0(NULL, &ptype, &pval, palg);
70 if (ptype != V_ASN1_SEQUENCE) {
71 DHerr(DH_F_DH_PUB_DECODE, DH_R_PARAMETER_ENCODING_ERROR);
79 if ((dh = d2i_dhp(pkey, &pm, pmlen)) == NULL) {
80 DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR);
84 if ((public_key = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL) {
85 DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR);
89 /* We have parameters now set public key */
90 if ((dh->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) {
91 DHerr(DH_F_DH_PUB_DECODE, DH_R_BN_DECODE_ERROR);
95 ASN1_INTEGER_free(public_key);
96 EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh);
100 ASN1_INTEGER_free(public_key);
106 static int dh_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
110 unsigned char *penc = NULL;
113 ASN1_INTEGER *pub_key = NULL;
117 str = ASN1_STRING_new();
119 DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
122 str->length = i2d_dhp(pkey, dh, &str->data);
123 if (str->length <= 0) {
124 DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
127 ptype = V_ASN1_SEQUENCE;
129 pub_key = BN_to_ASN1_INTEGER(dh->pub_key, NULL);
133 penclen = i2d_ASN1_INTEGER(pub_key, &penc);
135 ASN1_INTEGER_free(pub_key);
138 DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
142 if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(pkey->ameth->pkey_id),
143 ptype, str, penc, penclen))
148 ASN1_STRING_free(str);
154 * PKCS#8 DH is defined in PKCS#11 of all places. It is similar to DH in that
155 * the AlgorithmIdentifier contains the parameters, the private key is
156 * explicitly included and the pubkey must be recalculated.
159 static int dh_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8)
161 const unsigned char *p, *pm;
165 const ASN1_STRING *pstr;
166 const X509_ALGOR *palg;
167 ASN1_INTEGER *privkey = NULL;
170 if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
173 X509_ALGOR_get0(NULL, &ptype, &pval, palg);
175 if (ptype != V_ASN1_SEQUENCE)
177 if ((privkey = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL)
182 pmlen = pstr->length;
183 if ((dh = d2i_dhp(pkey, &pm, pmlen)) == NULL)
186 /* We have parameters now set private key */
187 if ((dh->priv_key = BN_secure_new()) == NULL
188 || !ASN1_INTEGER_to_BN(privkey, dh->priv_key)) {
189 DHerr(DH_F_DH_PRIV_DECODE, DH_R_BN_ERROR);
192 /* Calculate public key, increments dirty_cnt */
193 if (!DH_generate_key(dh))
196 EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh);
198 ASN1_STRING_clear_free(privkey);
203 DHerr(DH_F_DH_PRIV_DECODE, EVP_R_DECODE_ERROR);
206 ASN1_STRING_clear_free(privkey);
210 static int dh_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
212 ASN1_STRING *params = NULL;
213 ASN1_INTEGER *prkey = NULL;
214 unsigned char *dp = NULL;
217 params = ASN1_STRING_new();
219 if (params == NULL) {
220 DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
224 params->length = i2d_dhp(pkey, pkey->pkey.dh, ¶ms->data);
225 if (params->length <= 0) {
226 DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
229 params->type = V_ASN1_SEQUENCE;
231 /* Get private key into integer */
232 prkey = BN_to_ASN1_INTEGER(pkey->pkey.dh->priv_key, NULL);
235 DHerr(DH_F_DH_PRIV_ENCODE, DH_R_BN_ERROR);
239 dplen = i2d_ASN1_INTEGER(prkey, &dp);
241 ASN1_STRING_clear_free(prkey);
244 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0,
245 V_ASN1_SEQUENCE, params, dp, dplen))
252 ASN1_STRING_free(params);
253 ASN1_STRING_clear_free(prkey);
257 static int dh_param_decode(EVP_PKEY *pkey,
258 const unsigned char **pder, int derlen)
262 if ((dh = d2i_dhp(pkey, pder, derlen)) == NULL) {
263 DHerr(DH_F_DH_PARAM_DECODE, ERR_R_DH_LIB);
267 EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh);
271 static int dh_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
273 return i2d_dhp(pkey, pkey->pkey.dh, pder);
276 static int do_dh_print(BIO *bp, const DH *x, int indent, int ptype)
278 int reason = ERR_R_BUF_LIB;
279 const char *ktype = NULL;
280 BIGNUM *priv_key, *pub_key;
283 priv_key = x->priv_key;
288 pub_key = x->pub_key;
292 if (x->params.p == NULL || (ptype == 2 && priv_key == NULL)
293 || (ptype > 0 && pub_key == NULL)) {
294 reason = ERR_R_PASSED_NULL_PARAMETER;
299 ktype = "DH Private-Key";
301 ktype = "DH Public-Key";
303 ktype = "DH Parameters";
305 if (!BIO_indent(bp, indent, 128)
306 || BIO_printf(bp, "%s: (%d bit)\n", ktype, DH_bits(x)) <= 0)
310 if (!ASN1_bn_print(bp, "private-key:", priv_key, NULL, indent))
312 if (!ASN1_bn_print(bp, "public-key:", pub_key, NULL, indent))
315 if (!ffc_params_print(bp, &x->params, indent))
318 if (x->length != 0) {
319 if (!BIO_indent(bp, indent, 128)
320 || BIO_printf(bp, "recommended-private-length: %d bits\n",
321 (int)x->length) <= 0)
328 DHerr(DH_F_DO_DH_PRINT, reason);
332 static int int_dh_size(const EVP_PKEY *pkey)
334 return DH_size(pkey->pkey.dh);
337 static int dh_bits(const EVP_PKEY *pkey)
339 return DH_bits(pkey->pkey.dh);
342 static int dh_security_bits(const EVP_PKEY *pkey)
344 return DH_security_bits(pkey->pkey.dh);
347 static int dh_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
349 return ffc_params_cmp(&a->pkey.dh->params, &a->pkey.dh->params,
350 a->ameth != &dhx_asn1_meth);
353 static int int_dh_param_copy(DH *to, const DH *from, int is_x942)
356 is_x942 = (from->params.q != NULL);
357 if (!ffc_params_copy(&to->params, &from->params))
360 to->length = from->length;
365 DH *DHparams_dup(const DH *dh)
371 if (!int_dh_param_copy(ret, dh, -1)) {
378 static int dh_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
380 if (to->pkey.dh == NULL) {
381 to->pkey.dh = DH_new();
382 if (to->pkey.dh == NULL)
385 return int_dh_param_copy(to->pkey.dh, from->pkey.dh,
386 from->ameth == &dhx_asn1_meth);
389 static int dh_missing_parameters(const EVP_PKEY *a)
391 return a->pkey.dh == NULL
392 || a->pkey.dh->params.p == NULL
393 || a->pkey.dh->params.g == NULL;
396 static int dh_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
398 if (dh_cmp_parameters(a, b) == 0)
400 if (BN_cmp(b->pkey.dh->pub_key, a->pkey.dh->pub_key) != 0)
406 static int dh_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
409 return do_dh_print(bp, pkey->pkey.dh, indent, 0);
412 static int dh_public_print(BIO *bp, const EVP_PKEY *pkey, int indent,
415 return do_dh_print(bp, pkey->pkey.dh, indent, 1);
418 static int dh_private_print(BIO *bp, const EVP_PKEY *pkey, int indent,
421 return do_dh_print(bp, pkey->pkey.dh, indent, 2);
424 int DHparams_print(BIO *bp, const DH *x)
426 return do_dh_print(bp, x, 4, 0);
429 #ifndef OPENSSL_NO_CMS
430 static int dh_cms_decrypt(CMS_RecipientInfo *ri);
431 static int dh_cms_encrypt(CMS_RecipientInfo *ri);
434 static int dh_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
437 case ASN1_PKEY_CTRL_SET1_TLS_ENCPT:
438 return dh_buf2key(EVP_PKEY_get0_DH(pkey), arg2, arg1);
439 case ASN1_PKEY_CTRL_GET1_TLS_ENCPT:
440 return dh_key2buf(EVP_PKEY_get0_DH(pkey), arg2);
446 static int dhx_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
449 #ifndef OPENSSL_NO_CMS
451 case ASN1_PKEY_CTRL_CMS_ENVELOPE:
453 return dh_cms_decrypt(arg2);
455 return dh_cms_encrypt(arg2);
458 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
459 *(int *)arg2 = CMS_RECIPINFO_AGREE;
468 static int dh_pkey_public_check(const EVP_PKEY *pkey)
470 DH *dh = pkey->pkey.dh;
472 if (dh->pub_key == NULL) {
473 DHerr(DH_F_DH_PKEY_PUBLIC_CHECK, DH_R_MISSING_PUBKEY);
477 return DH_check_pub_key_ex(dh, dh->pub_key);
480 static int dh_pkey_param_check(const EVP_PKEY *pkey)
482 DH *dh = pkey->pkey.dh;
484 return DH_check_ex(dh);
487 static size_t dh_pkey_dirty_cnt(const EVP_PKEY *pkey)
489 return pkey->pkey.dh->dirty_cnt;
492 static int dh_pkey_export_to(const EVP_PKEY *from, void *to_keydata,
493 EVP_KEYMGMT *to_keymgmt)
495 DH *dh = from->pkey.dh;
497 const BIGNUM *p = DH_get0_p(dh), *g = DH_get0_g(dh), *q = DH_get0_q(dh);
498 const BIGNUM *pub_key = DH_get0_pub_key(dh);
499 const BIGNUM *priv_key = DH_get0_priv_key(dh);
505 * If the DH method is foreign, then we can't be sure of anything, and
506 * can therefore not export or pretend to export.
508 if (dh_get_method(dh) != DH_OpenSSL())
511 if (p == NULL || g == NULL)
514 ossl_param_bld_init(&tmpl);
515 if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_FFC_P, p)
516 || !ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_FFC_G, g))
519 if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_FFC_Q, q))
522 selection |= OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS;
523 if (pub_key != NULL) {
524 if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_PUB_KEY, pub_key))
526 selection |= OSSL_KEYMGMT_SELECT_PUBLIC_KEY;
528 if (priv_key != NULL) {
529 if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_PRIV_KEY,
532 selection |= OSSL_KEYMGMT_SELECT_PRIVATE_KEY;
535 if ((params = ossl_param_bld_to_param(&tmpl)) == NULL)
538 /* We export, the provider imports */
539 rv = evp_keymgmt_import(to_keymgmt, to_keydata, selection, params);
541 ossl_param_bld_free(params);
546 const EVP_PKEY_ASN1_METHOD dh_asn1_meth = {
552 "OpenSSL PKCS#3 DH method",
569 dh_missing_parameters,
581 dh_pkey_public_check,
590 const EVP_PKEY_ASN1_METHOD dhx_asn1_meth = {
596 "OpenSSL X9.42 DH method",
613 dh_missing_parameters,
625 dh_pkey_public_check,
629 #ifndef OPENSSL_NO_CMS
631 static int dh_cms_set_peerkey(EVP_PKEY_CTX *pctx,
632 X509_ALGOR *alg, ASN1_BIT_STRING *pubkey)
634 const ASN1_OBJECT *aoid;
637 ASN1_INTEGER *public_key = NULL;
639 EVP_PKEY *pkpeer = NULL, *pk = NULL;
641 const unsigned char *p;
644 X509_ALGOR_get0(&aoid, &atype, &aval, alg);
645 if (OBJ_obj2nid(aoid) != NID_dhpublicnumber)
647 /* Only absent parameters allowed in RFC XXXX */
648 if (atype != V_ASN1_UNDEF && atype == V_ASN1_NULL)
651 pk = EVP_PKEY_CTX_get0_pkey(pctx);
654 if (pk->type != EVP_PKEY_DHX)
656 /* Get parameters from parent key */
657 dhpeer = DHparams_dup(pk->pkey.dh);
658 /* We have parameters now set public key */
659 plen = ASN1_STRING_length(pubkey);
660 p = ASN1_STRING_get0_data(pubkey);
661 if (p == NULL || plen == 0)
664 if ((public_key = d2i_ASN1_INTEGER(NULL, &p, plen)) == NULL) {
665 DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_DECODE_ERROR);
669 /* We have parameters now set public key */
670 if ((dhpeer->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) {
671 DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_BN_DECODE_ERROR);
675 pkpeer = EVP_PKEY_new();
678 EVP_PKEY_assign(pkpeer, pk->ameth->pkey_id, dhpeer);
680 if (EVP_PKEY_derive_set_peer(pctx, pkpeer) > 0)
683 ASN1_INTEGER_free(public_key);
684 EVP_PKEY_free(pkpeer);
689 static int dh_cms_set_shared_info(EVP_PKEY_CTX *pctx, CMS_RecipientInfo *ri)
693 X509_ALGOR *alg, *kekalg = NULL;
694 ASN1_OCTET_STRING *ukm;
695 const unsigned char *p;
696 unsigned char *dukm = NULL;
699 const EVP_CIPHER *kekcipher;
700 EVP_CIPHER_CTX *kekctx;
702 if (!CMS_RecipientInfo_kari_get0_alg(ri, &alg, &ukm))
706 * For DH we only have one OID permissible. If ever any more get defined
707 * we will need something cleverer.
709 if (OBJ_obj2nid(alg->algorithm) != NID_id_smime_alg_ESDH) {
710 DHerr(DH_F_DH_CMS_SET_SHARED_INFO, DH_R_KDF_PARAMETER_ERROR);
714 if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, EVP_PKEY_DH_KDF_X9_42) <= 0)
717 if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, EVP_sha1()) <= 0)
720 if (alg->parameter->type != V_ASN1_SEQUENCE)
723 p = alg->parameter->value.sequence->data;
724 plen = alg->parameter->value.sequence->length;
725 kekalg = d2i_X509_ALGOR(NULL, &p, plen);
728 kekctx = CMS_RecipientInfo_kari_get0_ctx(ri);
731 kekcipher = EVP_get_cipherbyobj(kekalg->algorithm);
732 if (!kekcipher || EVP_CIPHER_mode(kekcipher) != EVP_CIPH_WRAP_MODE)
734 if (!EVP_EncryptInit_ex(kekctx, kekcipher, NULL, NULL, NULL))
736 if (EVP_CIPHER_asn1_to_param(kekctx, kekalg->parameter) <= 0)
739 keylen = EVP_CIPHER_CTX_key_length(kekctx);
740 if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0)
742 /* Use OBJ_nid2obj to ensure we use built in OID that isn't freed */
743 if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx,
744 OBJ_nid2obj(EVP_CIPHER_type(kekcipher)))
749 dukmlen = ASN1_STRING_length(ukm);
750 dukm = OPENSSL_memdup(ASN1_STRING_get0_data(ukm), dukmlen);
755 if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0)
761 X509_ALGOR_free(kekalg);
766 static int dh_cms_decrypt(CMS_RecipientInfo *ri)
770 pctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
774 /* See if we need to set peer key */
775 if (!EVP_PKEY_CTX_get0_peerkey(pctx)) {
777 ASN1_BIT_STRING *pubkey;
778 if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &alg, &pubkey,
783 if (!dh_cms_set_peerkey(pctx, alg, pubkey)) {
784 DHerr(DH_F_DH_CMS_DECRYPT, DH_R_PEER_KEY_ERROR);
788 /* Set DH derivation parameters and initialise unwrap context */
789 if (!dh_cms_set_shared_info(pctx, ri)) {
790 DHerr(DH_F_DH_CMS_DECRYPT, DH_R_SHARED_INFO_ERROR);
796 static int dh_cms_encrypt(CMS_RecipientInfo *ri)
802 X509_ALGOR *talg, *wrap_alg = NULL;
803 const ASN1_OBJECT *aoid;
804 ASN1_BIT_STRING *pubkey;
805 ASN1_STRING *wrap_str;
806 ASN1_OCTET_STRING *ukm;
807 unsigned char *penc = NULL, *dukm = NULL;
811 int kdf_type, wrap_nid;
812 const EVP_MD *kdf_md;
814 pctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
817 /* Get ephemeral key */
818 pkey = EVP_PKEY_CTX_get0_pkey(pctx);
819 if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &talg, &pubkey,
822 X509_ALGOR_get0(&aoid, NULL, NULL, talg);
823 /* Is everything uninitialised? */
824 if (aoid == OBJ_nid2obj(NID_undef)) {
825 ASN1_INTEGER *pubk = BN_to_ASN1_INTEGER(pkey->pkey.dh->pub_key, NULL);
831 penclen = i2d_ASN1_INTEGER(pubk, &penc);
832 ASN1_INTEGER_free(pubk);
835 ASN1_STRING_set0(pubkey, penc, penclen);
836 pubkey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
837 pubkey->flags |= ASN1_STRING_FLAG_BITS_LEFT;
840 X509_ALGOR_set0(talg, OBJ_nid2obj(NID_dhpublicnumber),
844 /* See if custom parameters set */
845 kdf_type = EVP_PKEY_CTX_get_dh_kdf_type(pctx);
848 if (!EVP_PKEY_CTX_get_dh_kdf_md(pctx, &kdf_md))
851 if (kdf_type == EVP_PKEY_DH_KDF_NONE) {
852 kdf_type = EVP_PKEY_DH_KDF_X9_42;
853 if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, kdf_type) <= 0)
855 } else if (kdf_type != EVP_PKEY_DH_KDF_X9_42)
858 if (kdf_md == NULL) {
859 /* Only SHA1 supported */
861 if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, kdf_md) <= 0)
863 } else if (EVP_MD_type(kdf_md) != NID_sha1)
864 /* Unsupported digest */
867 if (!CMS_RecipientInfo_kari_get0_alg(ri, &talg, &ukm))
871 ctx = CMS_RecipientInfo_kari_get0_ctx(ri);
872 wrap_nid = EVP_CIPHER_CTX_type(ctx);
873 if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx, OBJ_nid2obj(wrap_nid)) <= 0)
875 keylen = EVP_CIPHER_CTX_key_length(ctx);
877 /* Package wrap algorithm in an AlgorithmIdentifier */
879 wrap_alg = X509_ALGOR_new();
880 if (wrap_alg == NULL)
882 wrap_alg->algorithm = OBJ_nid2obj(wrap_nid);
883 wrap_alg->parameter = ASN1_TYPE_new();
884 if (wrap_alg->parameter == NULL)
886 if (EVP_CIPHER_param_to_asn1(ctx, wrap_alg->parameter) <= 0)
888 if (ASN1_TYPE_get(wrap_alg->parameter) == NID_undef) {
889 ASN1_TYPE_free(wrap_alg->parameter);
890 wrap_alg->parameter = NULL;
893 if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0)
897 dukmlen = ASN1_STRING_length(ukm);
898 dukm = OPENSSL_memdup(ASN1_STRING_get0_data(ukm), dukmlen);
903 if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0)
908 * Now need to wrap encoding of wrap AlgorithmIdentifier into parameter
909 * of another AlgorithmIdentifier.
912 penclen = i2d_X509_ALGOR(wrap_alg, &penc);
913 if (penc == NULL || penclen == 0)
915 wrap_str = ASN1_STRING_new();
916 if (wrap_str == NULL)
918 ASN1_STRING_set0(wrap_str, penc, penclen);
920 X509_ALGOR_set0(talg, OBJ_nid2obj(NID_id_smime_alg_ESDH),
921 V_ASN1_SEQUENCE, wrap_str);
927 X509_ALGOR_free(wrap_alg);