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/ec.h>
63 #include <openssl/bn.h>
64 #ifndef OPENSSL_NO_CMS
65 # include <openssl/cms.h>
67 #include <openssl/asn1t.h>
68 #include "internal/asn1_int.h"
69 #include "internal/evp_int.h"
71 #ifndef OPENSSL_NO_CMS
72 static int ecdh_cms_decrypt(CMS_RecipientInfo *ri);
73 static int ecdh_cms_encrypt(CMS_RecipientInfo *ri);
76 static int eckey_param2type(int *pptype, void **ppval, EC_KEY *ec_key)
78 const EC_GROUP *group;
80 if (ec_key == NULL || (group = EC_KEY_get0_group(ec_key)) == NULL) {
81 ECerr(EC_F_ECKEY_PARAM2TYPE, EC_R_MISSING_PARAMETERS);
84 if (EC_GROUP_get_asn1_flag(group)
85 && (nid = EC_GROUP_get_curve_name(group)))
86 /* we have a 'named curve' => just set the OID */
88 *ppval = OBJ_nid2obj(nid);
89 *pptype = V_ASN1_OBJECT;
90 } else { /* explicit parameters */
92 ASN1_STRING *pstr = NULL;
93 pstr = ASN1_STRING_new();
96 pstr->length = i2d_ECParameters(ec_key, &pstr->data);
97 if (pstr->length <= 0) {
98 ASN1_STRING_free(pstr);
99 ECerr(EC_F_ECKEY_PARAM2TYPE, ERR_R_EC_LIB);
103 *pptype = V_ASN1_SEQUENCE;
108 static int eckey_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
110 EC_KEY *ec_key = pkey->pkey.ec;
113 unsigned char *penc = NULL, *p;
116 if (!eckey_param2type(&ptype, &pval, ec_key)) {
117 ECerr(EC_F_ECKEY_PUB_ENCODE, ERR_R_EC_LIB);
120 penclen = i2o_ECPublicKey(ec_key, NULL);
123 penc = OPENSSL_malloc(penclen);
127 penclen = i2o_ECPublicKey(ec_key, &p);
130 if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_EC),
131 ptype, pval, penc, penclen))
134 if (ptype == V_ASN1_OBJECT)
135 ASN1_OBJECT_free(pval);
137 ASN1_STRING_free(pval);
142 static EC_KEY *eckey_type2param(int ptype, void *pval)
144 EC_KEY *eckey = NULL;
145 if (ptype == V_ASN1_SEQUENCE) {
146 ASN1_STRING *pstr = pval;
147 const unsigned char *pm = NULL;
150 pmlen = pstr->length;
151 if ((eckey = d2i_ECParameters(NULL, &pm, pmlen)) == NULL) {
152 ECerr(EC_F_ECKEY_TYPE2PARAM, EC_R_DECODE_ERROR);
155 } else if (ptype == V_ASN1_OBJECT) {
156 ASN1_OBJECT *poid = pval;
160 * type == V_ASN1_OBJECT => the parameters are given by an asn1 OID
162 if ((eckey = EC_KEY_new()) == NULL) {
163 ECerr(EC_F_ECKEY_TYPE2PARAM, ERR_R_MALLOC_FAILURE);
166 group = EC_GROUP_new_by_curve_name(OBJ_obj2nid(poid));
169 EC_GROUP_set_asn1_flag(group, OPENSSL_EC_NAMED_CURVE);
170 if (EC_KEY_set_group(eckey, group) == 0)
172 EC_GROUP_free(group);
174 ECerr(EC_F_ECKEY_TYPE2PARAM, EC_R_DECODE_ERROR);
185 static int eckey_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
187 const unsigned char *p = NULL;
190 EC_KEY *eckey = NULL;
193 if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
195 X509_ALGOR_get0(NULL, &ptype, &pval, palg);
197 eckey = eckey_type2param(ptype, pval);
200 ECerr(EC_F_ECKEY_PUB_DECODE, ERR_R_EC_LIB);
204 /* We have parameters now set public key */
205 if (!o2i_ECPublicKey(&eckey, &p, pklen)) {
206 ECerr(EC_F_ECKEY_PUB_DECODE, EC_R_DECODE_ERROR);
210 EVP_PKEY_assign_EC_KEY(pkey, eckey);
218 static int eckey_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
221 const EC_GROUP *group = EC_KEY_get0_group(b->pkey.ec);
222 const EC_POINT *pa = EC_KEY_get0_public_key(a->pkey.ec),
223 *pb = EC_KEY_get0_public_key(b->pkey.ec);
224 r = EC_POINT_cmp(group, pa, pb, NULL);
232 static int eckey_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
234 const unsigned char *p = NULL;
237 EC_KEY *eckey = NULL;
240 if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
242 X509_ALGOR_get0(NULL, &ptype, &pval, palg);
244 eckey = eckey_type2param(ptype, pval);
249 /* We have parameters now set private key */
250 if (!d2i_ECPrivateKey(&eckey, &p, pklen)) {
251 ECerr(EC_F_ECKEY_PRIV_DECODE, EC_R_DECODE_ERROR);
255 /* calculate public key (if necessary) */
256 if (EC_KEY_get0_public_key(eckey) == NULL) {
257 const BIGNUM *priv_key;
258 const EC_GROUP *group;
261 * the public key was not included in the SEC1 private key =>
262 * calculate the public key
264 group = EC_KEY_get0_group(eckey);
265 pub_key = EC_POINT_new(group);
266 if (pub_key == NULL) {
267 ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB);
270 if (!EC_POINT_copy(pub_key, EC_GROUP_get0_generator(group))) {
271 EC_POINT_free(pub_key);
272 ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB);
275 priv_key = EC_KEY_get0_private_key(eckey);
276 if (!EC_POINT_mul(group, pub_key, priv_key, NULL, NULL, NULL)) {
277 EC_POINT_free(pub_key);
278 ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB);
281 if (EC_KEY_set_public_key(eckey, pub_key) == 0) {
282 EC_POINT_free(pub_key);
283 ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB);
286 EC_POINT_free(pub_key);
289 EVP_PKEY_assign_EC_KEY(pkey, eckey);
293 ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB);
299 static int eckey_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
302 unsigned char *ep, *p;
305 unsigned int tmp_flags, old_flags;
307 ec_key = pkey->pkey.ec;
309 if (!eckey_param2type(&ptype, &pval, ec_key)) {
310 ECerr(EC_F_ECKEY_PRIV_ENCODE, EC_R_DECODE_ERROR);
314 /* set the private key */
317 * do not include the parameters in the SEC1 private key see PKCS#11
320 old_flags = EC_KEY_get_enc_flags(ec_key);
321 tmp_flags = old_flags | EC_PKEY_NO_PARAMETERS;
322 EC_KEY_set_enc_flags(ec_key, tmp_flags);
323 eplen = i2d_ECPrivateKey(ec_key, NULL);
325 EC_KEY_set_enc_flags(ec_key, old_flags);
326 ECerr(EC_F_ECKEY_PRIV_ENCODE, ERR_R_EC_LIB);
329 ep = OPENSSL_malloc(eplen);
331 EC_KEY_set_enc_flags(ec_key, old_flags);
332 ECerr(EC_F_ECKEY_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
336 if (!i2d_ECPrivateKey(ec_key, &p)) {
337 EC_KEY_set_enc_flags(ec_key, old_flags);
339 ECerr(EC_F_ECKEY_PRIV_ENCODE, ERR_R_EC_LIB);
342 /* restore old encoding flags */
343 EC_KEY_set_enc_flags(ec_key, old_flags);
345 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_X9_62_id_ecPublicKey), 0,
346 ptype, pval, ep, eplen))
352 static int int_ec_size(const EVP_PKEY *pkey)
354 return ECDSA_size(pkey->pkey.ec);
357 static int ec_bits(const EVP_PKEY *pkey)
359 return EC_GROUP_order_bits(EC_KEY_get0_group(pkey->pkey.ec));
362 static int ec_security_bits(const EVP_PKEY *pkey)
364 int ecbits = ec_bits(pkey);
378 static int ec_missing_parameters(const EVP_PKEY *pkey)
380 if (EC_KEY_get0_group(pkey->pkey.ec) == NULL)
385 static int ec_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
387 EC_GROUP *group = EC_GROUP_dup(EC_KEY_get0_group(from->pkey.ec));
390 if (to->pkey.ec == NULL) {
391 to->pkey.ec = EC_KEY_new();
392 if (to->pkey.ec == NULL)
395 if (EC_KEY_set_group(to->pkey.ec, group) == 0)
397 EC_GROUP_free(group);
401 static int ec_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
403 const EC_GROUP *group_a = EC_KEY_get0_group(a->pkey.ec),
404 *group_b = EC_KEY_get0_group(b->pkey.ec);
405 if (EC_GROUP_cmp(group_a, group_b, NULL))
411 static void int_ec_free(EVP_PKEY *pkey)
413 EC_KEY_free(pkey->pkey.ec);
416 static int do_EC_KEY_print(BIO *bp, const EC_KEY *x, int off, int ktype)
418 unsigned char *buffer = NULL;
420 size_t buf_len = 0, i;
421 int ret = 0, reason = ERR_R_BIO_LIB;
422 BIGNUM *pub_key = NULL;
424 const EC_GROUP *group;
425 const EC_POINT *public_key;
426 const BIGNUM *priv_key;
428 if (x == NULL || (group = EC_KEY_get0_group(x)) == NULL) {
429 reason = ERR_R_PASSED_NULL_PARAMETER;
435 reason = ERR_R_MALLOC_FAILURE;
440 public_key = EC_KEY_get0_public_key(x);
441 if (public_key != NULL) {
442 if ((pub_key = EC_POINT_point2bn(group, public_key,
443 EC_KEY_get_conv_form(x), NULL,
445 reason = ERR_R_EC_LIB;
448 buf_len = (size_t)BN_num_bytes(pub_key);
453 priv_key = EC_KEY_get0_private_key(x);
454 if (priv_key && (i = (size_t)BN_num_bytes(priv_key)) > buf_len)
461 if ((buffer = OPENSSL_malloc(buf_len)) == NULL) {
462 reason = ERR_R_MALLOC_FAILURE;
467 ecstr = "Private-Key";
469 ecstr = "Public-Key";
471 ecstr = "ECDSA-Parameters";
473 if (!BIO_indent(bp, off, 128))
475 if (BIO_printf(bp, "%s: (%d bit)\n", ecstr,
476 EC_GROUP_order_bits(group)) <= 0)
479 if ((priv_key != NULL) && !ASN1_bn_print(bp, "priv:", priv_key,
482 if ((pub_key != NULL) && !ASN1_bn_print(bp, "pub: ", pub_key,
485 if (!ECPKParameters_print(bp, group, off))
490 ECerr(EC_F_DO_EC_KEY_PRINT, reason);
493 OPENSSL_free(buffer);
497 static int eckey_param_decode(EVP_PKEY *pkey,
498 const unsigned char **pder, int derlen)
502 if ((eckey = d2i_ECParameters(NULL, pder, derlen)) == NULL) {
503 ECerr(EC_F_ECKEY_PARAM_DECODE, ERR_R_EC_LIB);
506 EVP_PKEY_assign_EC_KEY(pkey, eckey);
510 static int eckey_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
512 return i2d_ECParameters(pkey->pkey.ec, pder);
515 static int eckey_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
518 return do_EC_KEY_print(bp, pkey->pkey.ec, indent, 0);
521 static int eckey_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
524 return do_EC_KEY_print(bp, pkey->pkey.ec, indent, 1);
527 static int eckey_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
530 return do_EC_KEY_print(bp, pkey->pkey.ec, indent, 2);
533 static int old_ec_priv_decode(EVP_PKEY *pkey,
534 const unsigned char **pder, int derlen)
538 if ((ec = d2i_ECPrivateKey(NULL, pder, derlen)) == NULL) {
539 ECerr(EC_F_OLD_EC_PRIV_DECODE, EC_R_DECODE_ERROR);
542 EVP_PKEY_assign_EC_KEY(pkey, ec);
546 static int old_ec_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
548 return i2d_ECPrivateKey(pkey->pkey.ec, pder);
551 static int ec_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
554 case ASN1_PKEY_CTRL_PKCS7_SIGN:
557 X509_ALGOR *alg1, *alg2;
558 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
559 if (alg1 == NULL || alg1->algorithm == NULL)
561 hnid = OBJ_obj2nid(alg1->algorithm);
562 if (hnid == NID_undef)
564 if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
566 X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
569 #ifndef OPENSSL_NO_CMS
570 case ASN1_PKEY_CTRL_CMS_SIGN:
573 X509_ALGOR *alg1, *alg2;
574 CMS_SignerInfo_get0_algs(arg2, NULL, NULL, &alg1, &alg2);
575 if (alg1 == NULL || alg1->algorithm == NULL)
577 hnid = OBJ_obj2nid(alg1->algorithm);
578 if (hnid == NID_undef)
580 if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
582 X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
586 case ASN1_PKEY_CTRL_CMS_ENVELOPE:
588 return ecdh_cms_decrypt(arg2);
590 return ecdh_cms_encrypt(arg2);
593 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
594 *(int *)arg2 = CMS_RECIPINFO_AGREE;
598 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
599 *(int *)arg2 = NID_sha256;
609 const EVP_PKEY_ASN1_METHOD eckey_asn1_meth = {
614 "OpenSSL EC algorithm",
631 ec_missing_parameters,
643 #ifndef OPENSSL_NO_CMS
645 static int ecdh_cms_set_peerkey(EVP_PKEY_CTX *pctx,
646 X509_ALGOR *alg, ASN1_BIT_STRING *pubkey)
652 EVP_PKEY *pkpeer = NULL;
653 EC_KEY *ecpeer = NULL;
654 const unsigned char *p;
656 X509_ALGOR_get0(&aoid, &atype, &aval, alg);
657 if (OBJ_obj2nid(aoid) != NID_X9_62_id_ecPublicKey)
659 /* If absent parameters get group from main key */
660 if (atype == V_ASN1_UNDEF || atype == V_ASN1_NULL) {
663 pk = EVP_PKEY_CTX_get0_pkey(pctx);
666 grp = EC_KEY_get0_group(pk->pkey.ec);
667 ecpeer = EC_KEY_new();
670 if (!EC_KEY_set_group(ecpeer, grp))
673 ecpeer = eckey_type2param(atype, aval);
677 /* We have parameters now set public key */
678 plen = ASN1_STRING_length(pubkey);
679 p = ASN1_STRING_data(pubkey);
682 if (!o2i_ECPublicKey(&ecpeer, &p, plen))
684 pkpeer = EVP_PKEY_new();
687 EVP_PKEY_set1_EC_KEY(pkpeer, ecpeer);
688 if (EVP_PKEY_derive_set_peer(pctx, pkpeer) > 0)
692 EVP_PKEY_free(pkpeer);
696 /* Set KDF parameters based on KDF NID */
697 static int ecdh_cms_set_kdf_param(EVP_PKEY_CTX *pctx, int eckdf_nid)
699 int kdf_nid, kdfmd_nid, cofactor;
700 const EVP_MD *kdf_md;
701 if (eckdf_nid == NID_undef)
704 /* Lookup KDF type, cofactor mode and digest */
705 if (!OBJ_find_sigid_algs(eckdf_nid, &kdfmd_nid, &kdf_nid))
708 if (kdf_nid == NID_dh_std_kdf)
710 else if (kdf_nid == NID_dh_cofactor_kdf)
715 if (EVP_PKEY_CTX_set_ecdh_cofactor_mode(pctx, cofactor) <= 0)
718 if (EVP_PKEY_CTX_set_ecdh_kdf_type(pctx, EVP_PKEY_ECDH_KDF_X9_62) <= 0)
721 kdf_md = EVP_get_digestbynid(kdfmd_nid);
725 if (EVP_PKEY_CTX_set_ecdh_kdf_md(pctx, kdf_md) <= 0)
730 static int ecdh_cms_set_shared_info(EVP_PKEY_CTX *pctx, CMS_RecipientInfo *ri)
734 X509_ALGOR *alg, *kekalg = NULL;
735 ASN1_OCTET_STRING *ukm;
736 const unsigned char *p;
737 unsigned char *der = NULL;
739 const EVP_CIPHER *kekcipher;
740 EVP_CIPHER_CTX *kekctx;
742 if (!CMS_RecipientInfo_kari_get0_alg(ri, &alg, &ukm))
745 if (!ecdh_cms_set_kdf_param(pctx, OBJ_obj2nid(alg->algorithm))) {
746 ECerr(EC_F_ECDH_CMS_SET_SHARED_INFO, EC_R_KDF_PARAMETER_ERROR);
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_ecdh_kdf_outlen(pctx, keylen) <= 0)
773 plen = CMS_SharedInfo_encode(&der, kekalg, ukm, keylen);
778 if (EVP_PKEY_CTX_set0_ecdh_kdf_ukm(pctx, der, plen) <= 0)
784 X509_ALGOR_free(kekalg);
789 static int ecdh_cms_decrypt(CMS_RecipientInfo *ri)
792 pctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
795 /* See if we need to set peer key */
796 if (!EVP_PKEY_CTX_get0_peerkey(pctx)) {
798 ASN1_BIT_STRING *pubkey;
799 if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &alg, &pubkey,
804 if (!ecdh_cms_set_peerkey(pctx, alg, pubkey)) {
805 ECerr(EC_F_ECDH_CMS_DECRYPT, EC_R_PEER_KEY_ERROR);
809 /* Set ECDH derivation parameters and initialise unwrap context */
810 if (!ecdh_cms_set_shared_info(pctx, ri)) {
811 ECerr(EC_F_ECDH_CMS_DECRYPT, EC_R_SHARED_INFO_ERROR);
817 static int ecdh_cms_encrypt(CMS_RecipientInfo *ri)
823 X509_ALGOR *talg, *wrap_alg = NULL;
825 ASN1_BIT_STRING *pubkey;
826 ASN1_STRING *wrap_str;
827 ASN1_OCTET_STRING *ukm;
828 unsigned char *penc = NULL;
831 int ecdh_nid, kdf_type, kdf_nid, wrap_nid;
832 const EVP_MD *kdf_md;
833 pctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
836 /* Get ephemeral key */
837 pkey = EVP_PKEY_CTX_get0_pkey(pctx);
838 if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &talg, &pubkey,
841 X509_ALGOR_get0(&aoid, NULL, NULL, talg);
842 /* Is everything uninitialised? */
843 if (aoid == OBJ_nid2obj(NID_undef)) {
845 EC_KEY *eckey = pkey->pkey.ec;
849 penclen = i2o_ECPublicKey(eckey, NULL);
852 penc = OPENSSL_malloc(penclen);
856 penclen = i2o_ECPublicKey(eckey, &p);
859 ASN1_STRING_set0(pubkey, penc, penclen);
860 pubkey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
861 pubkey->flags |= ASN1_STRING_FLAG_BITS_LEFT;
864 X509_ALGOR_set0(talg, OBJ_nid2obj(NID_X9_62_id_ecPublicKey),
868 /* See if custom paraneters set */
869 kdf_type = EVP_PKEY_CTX_get_ecdh_kdf_type(pctx);
872 if (!EVP_PKEY_CTX_get_ecdh_kdf_md(pctx, &kdf_md))
874 ecdh_nid = EVP_PKEY_CTX_get_ecdh_cofactor_mode(pctx);
877 else if (ecdh_nid == 0)
878 ecdh_nid = NID_dh_std_kdf;
879 else if (ecdh_nid == 1)
880 ecdh_nid = NID_dh_cofactor_kdf;
882 if (kdf_type == EVP_PKEY_ECDH_KDF_NONE) {
883 kdf_type = EVP_PKEY_ECDH_KDF_X9_62;
884 if (EVP_PKEY_CTX_set_ecdh_kdf_type(pctx, kdf_type) <= 0)
889 if (kdf_md == NULL) {
890 /* Fixme later for better MD */
892 if (EVP_PKEY_CTX_set_ecdh_kdf_md(pctx, kdf_md) <= 0)
896 if (!CMS_RecipientInfo_kari_get0_alg(ri, &talg, &ukm))
899 /* Lookup NID for KDF+cofactor+digest */
901 if (!OBJ_find_sigid_by_algs(&kdf_nid, EVP_MD_type(kdf_md), ecdh_nid))
904 ctx = CMS_RecipientInfo_kari_get0_ctx(ri);
905 wrap_nid = EVP_CIPHER_CTX_type(ctx);
906 keylen = EVP_CIPHER_CTX_key_length(ctx);
908 /* Package wrap algorithm in an AlgorithmIdentifier */
910 wrap_alg = X509_ALGOR_new();
911 if (wrap_alg == NULL)
913 wrap_alg->algorithm = OBJ_nid2obj(wrap_nid);
914 wrap_alg->parameter = ASN1_TYPE_new();
915 if (wrap_alg->parameter == NULL)
917 if (EVP_CIPHER_param_to_asn1(ctx, wrap_alg->parameter) <= 0)
919 if (ASN1_TYPE_get(wrap_alg->parameter) == NID_undef) {
920 ASN1_TYPE_free(wrap_alg->parameter);
921 wrap_alg->parameter = NULL;
924 if (EVP_PKEY_CTX_set_ecdh_kdf_outlen(pctx, keylen) <= 0)
927 penclen = CMS_SharedInfo_encode(&penc, wrap_alg, ukm, keylen);
932 if (EVP_PKEY_CTX_set0_ecdh_kdf_ukm(pctx, penc, penclen) <= 0)
937 * Now need to wrap encoding of wrap AlgorithmIdentifier into parameter
938 * of another AlgorithmIdentifier.
940 penclen = i2d_X509_ALGOR(wrap_alg, &penc);
941 if (!penc || !penclen)
943 wrap_str = ASN1_STRING_new();
944 if (wrap_str == NULL)
946 ASN1_STRING_set0(wrap_str, penc, penclen);
948 X509_ALGOR_set0(talg, OBJ_nid2obj(kdf_nid), V_ASN1_SEQUENCE, wrap_str);
954 X509_ALGOR_free(wrap_alg);