2 * Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (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 #include "internal/cryptlib.h"
12 #include <openssl/x509.h>
13 #include <openssl/ec.h>
14 #include <openssl/bn.h>
15 #include <openssl/cms.h>
16 #include <openssl/asn1t.h>
17 #include "internal/asn1_int.h"
18 #include "internal/evp_int.h"
20 #ifndef OPENSSL_NO_CMS
21 static int ecdh_cms_decrypt(CMS_RecipientInfo
*ri
);
22 static int ecdh_cms_encrypt(CMS_RecipientInfo
*ri
);
25 static int eckey_param2type(int *pptype
, void **ppval
, EC_KEY
*ec_key
)
27 const EC_GROUP
*group
;
29 if (ec_key
== NULL
|| (group
= EC_KEY_get0_group(ec_key
)) == NULL
) {
30 ECerr(EC_F_ECKEY_PARAM2TYPE
, EC_R_MISSING_PARAMETERS
);
33 if (EC_GROUP_get_asn1_flag(group
)
34 && (nid
= EC_GROUP_get_curve_name(group
)))
35 /* we have a 'named curve' => just set the OID */
37 *ppval
= OBJ_nid2obj(nid
);
38 *pptype
= V_ASN1_OBJECT
;
39 } else { /* explicit parameters */
41 ASN1_STRING
*pstr
= NULL
;
42 pstr
= ASN1_STRING_new();
45 pstr
->length
= i2d_ECParameters(ec_key
, &pstr
->data
);
46 if (pstr
->length
<= 0) {
47 ASN1_STRING_free(pstr
);
48 ECerr(EC_F_ECKEY_PARAM2TYPE
, ERR_R_EC_LIB
);
52 *pptype
= V_ASN1_SEQUENCE
;
57 static int eckey_pub_encode(X509_PUBKEY
*pk
, const EVP_PKEY
*pkey
)
59 EC_KEY
*ec_key
= pkey
->pkey
.ec
;
62 unsigned char *penc
= NULL
, *p
;
65 if (!eckey_param2type(&ptype
, &pval
, ec_key
)) {
66 ECerr(EC_F_ECKEY_PUB_ENCODE
, ERR_R_EC_LIB
);
69 penclen
= i2o_ECPublicKey(ec_key
, NULL
);
72 penc
= OPENSSL_malloc(penclen
);
76 penclen
= i2o_ECPublicKey(ec_key
, &p
);
79 if (X509_PUBKEY_set0_param(pk
, OBJ_nid2obj(EVP_PKEY_EC
),
80 ptype
, pval
, penc
, penclen
))
83 if (ptype
== V_ASN1_OBJECT
)
84 ASN1_OBJECT_free(pval
);
86 ASN1_STRING_free(pval
);
91 static EC_KEY
*eckey_type2param(int ptype
, void *pval
)
94 if (ptype
== V_ASN1_SEQUENCE
) {
95 ASN1_STRING
*pstr
= pval
;
96 const unsigned char *pm
= NULL
;
100 if ((eckey
= d2i_ECParameters(NULL
, &pm
, pmlen
)) == NULL
) {
101 ECerr(EC_F_ECKEY_TYPE2PARAM
, EC_R_DECODE_ERROR
);
104 } else if (ptype
== V_ASN1_OBJECT
) {
105 ASN1_OBJECT
*poid
= pval
;
109 * type == V_ASN1_OBJECT => the parameters are given by an asn1 OID
111 if ((eckey
= EC_KEY_new()) == NULL
) {
112 ECerr(EC_F_ECKEY_TYPE2PARAM
, ERR_R_MALLOC_FAILURE
);
115 group
= EC_GROUP_new_by_curve_name(OBJ_obj2nid(poid
));
118 EC_GROUP_set_asn1_flag(group
, OPENSSL_EC_NAMED_CURVE
);
119 if (EC_KEY_set_group(eckey
, group
) == 0)
121 EC_GROUP_free(group
);
123 ECerr(EC_F_ECKEY_TYPE2PARAM
, EC_R_DECODE_ERROR
);
134 static int eckey_pub_decode(EVP_PKEY
*pkey
, X509_PUBKEY
*pubkey
)
136 const unsigned char *p
= NULL
;
139 EC_KEY
*eckey
= NULL
;
142 if (!X509_PUBKEY_get0_param(NULL
, &p
, &pklen
, &palg
, pubkey
))
144 X509_ALGOR_get0(NULL
, &ptype
, &pval
, palg
);
146 eckey
= eckey_type2param(ptype
, pval
);
149 ECerr(EC_F_ECKEY_PUB_DECODE
, ERR_R_EC_LIB
);
153 /* We have parameters now set public key */
154 if (!o2i_ECPublicKey(&eckey
, &p
, pklen
)) {
155 ECerr(EC_F_ECKEY_PUB_DECODE
, EC_R_DECODE_ERROR
);
159 EVP_PKEY_assign_EC_KEY(pkey
, eckey
);
167 static int eckey_pub_cmp(const EVP_PKEY
*a
, const EVP_PKEY
*b
)
170 const EC_GROUP
*group
= EC_KEY_get0_group(b
->pkey
.ec
);
171 const EC_POINT
*pa
= EC_KEY_get0_public_key(a
->pkey
.ec
),
172 *pb
= EC_KEY_get0_public_key(b
->pkey
.ec
);
173 r
= EC_POINT_cmp(group
, pa
, pb
, NULL
);
181 static int eckey_priv_decode(EVP_PKEY
*pkey
, PKCS8_PRIV_KEY_INFO
*p8
)
183 const unsigned char *p
= NULL
;
186 EC_KEY
*eckey
= NULL
;
189 if (!PKCS8_pkey_get0(NULL
, &p
, &pklen
, &palg
, p8
))
191 X509_ALGOR_get0(NULL
, &ptype
, &pval
, palg
);
193 eckey
= eckey_type2param(ptype
, pval
);
198 /* We have parameters now set private key */
199 if (!d2i_ECPrivateKey(&eckey
, &p
, pklen
)) {
200 ECerr(EC_F_ECKEY_PRIV_DECODE
, EC_R_DECODE_ERROR
);
204 EVP_PKEY_assign_EC_KEY(pkey
, eckey
);
208 ECerr(EC_F_ECKEY_PRIV_DECODE
, ERR_R_EC_LIB
);
214 static int eckey_priv_encode(PKCS8_PRIV_KEY_INFO
*p8
, const EVP_PKEY
*pkey
)
217 unsigned char *ep
, *p
;
220 unsigned int tmp_flags
, old_flags
;
222 ec_key
= pkey
->pkey
.ec
;
224 if (!eckey_param2type(&ptype
, &pval
, ec_key
)) {
225 ECerr(EC_F_ECKEY_PRIV_ENCODE
, EC_R_DECODE_ERROR
);
229 /* set the private key */
232 * do not include the parameters in the SEC1 private key see PKCS#11
235 old_flags
= EC_KEY_get_enc_flags(ec_key
);
236 tmp_flags
= old_flags
| EC_PKEY_NO_PARAMETERS
;
237 EC_KEY_set_enc_flags(ec_key
, tmp_flags
);
238 eplen
= i2d_ECPrivateKey(ec_key
, NULL
);
240 EC_KEY_set_enc_flags(ec_key
, old_flags
);
241 ECerr(EC_F_ECKEY_PRIV_ENCODE
, ERR_R_EC_LIB
);
244 ep
= OPENSSL_malloc(eplen
);
246 EC_KEY_set_enc_flags(ec_key
, old_flags
);
247 ECerr(EC_F_ECKEY_PRIV_ENCODE
, ERR_R_MALLOC_FAILURE
);
251 if (!i2d_ECPrivateKey(ec_key
, &p
)) {
252 EC_KEY_set_enc_flags(ec_key
, old_flags
);
254 ECerr(EC_F_ECKEY_PRIV_ENCODE
, ERR_R_EC_LIB
);
257 /* restore old encoding flags */
258 EC_KEY_set_enc_flags(ec_key
, old_flags
);
260 if (!PKCS8_pkey_set0(p8
, OBJ_nid2obj(NID_X9_62_id_ecPublicKey
), 0,
261 ptype
, pval
, ep
, eplen
))
267 static int int_ec_size(const EVP_PKEY
*pkey
)
269 return ECDSA_size(pkey
->pkey
.ec
);
272 static int ec_bits(const EVP_PKEY
*pkey
)
274 return EC_GROUP_order_bits(EC_KEY_get0_group(pkey
->pkey
.ec
));
277 static int ec_security_bits(const EVP_PKEY
*pkey
)
279 int ecbits
= ec_bits(pkey
);
293 static int ec_missing_parameters(const EVP_PKEY
*pkey
)
295 if (pkey
->pkey
.ec
== NULL
|| EC_KEY_get0_group(pkey
->pkey
.ec
) == NULL
)
300 static int ec_copy_parameters(EVP_PKEY
*to
, const EVP_PKEY
*from
)
302 EC_GROUP
*group
= EC_GROUP_dup(EC_KEY_get0_group(from
->pkey
.ec
));
305 if (to
->pkey
.ec
== NULL
) {
306 to
->pkey
.ec
= EC_KEY_new();
307 if (to
->pkey
.ec
== NULL
)
310 if (EC_KEY_set_group(to
->pkey
.ec
, group
) == 0)
312 EC_GROUP_free(group
);
316 static int ec_cmp_parameters(const EVP_PKEY
*a
, const EVP_PKEY
*b
)
318 const EC_GROUP
*group_a
= EC_KEY_get0_group(a
->pkey
.ec
),
319 *group_b
= EC_KEY_get0_group(b
->pkey
.ec
);
320 if (EC_GROUP_cmp(group_a
, group_b
, NULL
))
326 static void int_ec_free(EVP_PKEY
*pkey
)
328 EC_KEY_free(pkey
->pkey
.ec
);
332 EC_KEY_PRINT_PRIVATE
,
337 static int do_EC_KEY_print(BIO
*bp
, const EC_KEY
*x
, int off
, ec_print_t ktype
)
340 unsigned char *priv
= NULL
, *pub
= NULL
;
341 size_t privlen
= 0, publen
= 0;
343 const EC_GROUP
*group
;
345 if (x
== NULL
|| (group
= EC_KEY_get0_group(x
)) == NULL
) {
346 ECerr(EC_F_DO_EC_KEY_PRINT
, ERR_R_PASSED_NULL_PARAMETER
);
350 if (ktype
!= EC_KEY_PRINT_PARAM
) {
351 publen
= EC_KEY_key2buf(x
, EC_KEY_get_conv_form(x
), &pub
, NULL
);
356 if (ktype
== EC_KEY_PRINT_PRIVATE
&& EC_KEY_get0_private_key(x
) != NULL
) {
357 privlen
= EC_KEY_priv2buf(x
, &priv
);
362 if (ktype
== EC_KEY_PRINT_PRIVATE
)
363 ecstr
= "Private-Key";
364 else if (ktype
== EC_KEY_PRINT_PUBLIC
)
365 ecstr
= "Public-Key";
367 ecstr
= "ECDSA-Parameters";
369 if (!BIO_indent(bp
, off
, 128))
371 if (BIO_printf(bp
, "%s: (%d bit)\n", ecstr
,
372 EC_GROUP_order_bits(group
)) <= 0)
376 if (BIO_printf(bp
, "%*spriv:\n", off
, "") <= 0)
378 if (ASN1_buf_print(bp
, priv
, privlen
, off
+ 4) == 0)
383 if (BIO_printf(bp
, "%*spub:\n", off
, "") <= 0)
385 if (ASN1_buf_print(bp
, pub
, publen
, off
+ 4) == 0)
389 if (!ECPKParameters_print(bp
, group
, off
))
394 ECerr(EC_F_DO_EC_KEY_PRINT
, ERR_R_EC_LIB
);
395 OPENSSL_clear_free(priv
, privlen
);
400 static int eckey_param_decode(EVP_PKEY
*pkey
,
401 const unsigned char **pder
, int derlen
)
405 if ((eckey
= d2i_ECParameters(NULL
, pder
, derlen
)) == NULL
) {
406 ECerr(EC_F_ECKEY_PARAM_DECODE
, ERR_R_EC_LIB
);
409 EVP_PKEY_assign_EC_KEY(pkey
, eckey
);
413 static int eckey_param_encode(const EVP_PKEY
*pkey
, unsigned char **pder
)
415 return i2d_ECParameters(pkey
->pkey
.ec
, pder
);
418 static int eckey_param_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
421 return do_EC_KEY_print(bp
, pkey
->pkey
.ec
, indent
, EC_KEY_PRINT_PARAM
);
424 static int eckey_pub_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
427 return do_EC_KEY_print(bp
, pkey
->pkey
.ec
, indent
, EC_KEY_PRINT_PUBLIC
);
430 static int eckey_priv_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
433 return do_EC_KEY_print(bp
, pkey
->pkey
.ec
, indent
, EC_KEY_PRINT_PRIVATE
);
436 static int old_ec_priv_decode(EVP_PKEY
*pkey
,
437 const unsigned char **pder
, int derlen
)
441 if ((ec
= d2i_ECPrivateKey(NULL
, pder
, derlen
)) == NULL
) {
442 ECerr(EC_F_OLD_EC_PRIV_DECODE
, EC_R_DECODE_ERROR
);
445 EVP_PKEY_assign_EC_KEY(pkey
, ec
);
449 static int old_ec_priv_encode(const EVP_PKEY
*pkey
, unsigned char **pder
)
451 return i2d_ECPrivateKey(pkey
->pkey
.ec
, pder
);
454 static int ec_pkey_ctrl(EVP_PKEY
*pkey
, int op
, long arg1
, void *arg2
)
457 case ASN1_PKEY_CTRL_PKCS7_SIGN
:
460 X509_ALGOR
*alg1
, *alg2
;
461 PKCS7_SIGNER_INFO_get0_algs(arg2
, NULL
, &alg1
, &alg2
);
462 if (alg1
== NULL
|| alg1
->algorithm
== NULL
)
464 hnid
= OBJ_obj2nid(alg1
->algorithm
);
465 if (hnid
== NID_undef
)
467 if (!OBJ_find_sigid_by_algs(&snid
, hnid
, EVP_PKEY_id(pkey
)))
469 X509_ALGOR_set0(alg2
, OBJ_nid2obj(snid
), V_ASN1_UNDEF
, 0);
472 #ifndef OPENSSL_NO_CMS
473 case ASN1_PKEY_CTRL_CMS_SIGN
:
476 X509_ALGOR
*alg1
, *alg2
;
477 CMS_SignerInfo_get0_algs(arg2
, NULL
, NULL
, &alg1
, &alg2
);
478 if (alg1
== NULL
|| alg1
->algorithm
== NULL
)
480 hnid
= OBJ_obj2nid(alg1
->algorithm
);
481 if (hnid
== NID_undef
)
483 if (!OBJ_find_sigid_by_algs(&snid
, hnid
, EVP_PKEY_id(pkey
)))
485 X509_ALGOR_set0(alg2
, OBJ_nid2obj(snid
), V_ASN1_UNDEF
, 0);
489 case ASN1_PKEY_CTRL_CMS_ENVELOPE
:
491 return ecdh_cms_decrypt(arg2
);
493 return ecdh_cms_encrypt(arg2
);
496 case ASN1_PKEY_CTRL_CMS_RI_TYPE
:
497 *(int *)arg2
= CMS_RECIPINFO_AGREE
;
501 case ASN1_PKEY_CTRL_DEFAULT_MD_NID
:
502 *(int *)arg2
= NID_sha256
;
512 const EVP_PKEY_ASN1_METHOD eckey_asn1_meth
= {
517 "OpenSSL EC algorithm",
534 ec_missing_parameters
,
546 #ifndef OPENSSL_NO_CMS
548 static int ecdh_cms_set_peerkey(EVP_PKEY_CTX
*pctx
,
549 X509_ALGOR
*alg
, ASN1_BIT_STRING
*pubkey
)
555 EVP_PKEY
*pkpeer
= NULL
;
556 EC_KEY
*ecpeer
= NULL
;
557 const unsigned char *p
;
559 X509_ALGOR_get0(&aoid
, &atype
, &aval
, alg
);
560 if (OBJ_obj2nid(aoid
) != NID_X9_62_id_ecPublicKey
)
562 /* If absent parameters get group from main key */
563 if (atype
== V_ASN1_UNDEF
|| atype
== V_ASN1_NULL
) {
566 pk
= EVP_PKEY_CTX_get0_pkey(pctx
);
569 grp
= EC_KEY_get0_group(pk
->pkey
.ec
);
570 ecpeer
= EC_KEY_new();
573 if (!EC_KEY_set_group(ecpeer
, grp
))
576 ecpeer
= eckey_type2param(atype
, aval
);
580 /* We have parameters now set public key */
581 plen
= ASN1_STRING_length(pubkey
);
582 p
= ASN1_STRING_data(pubkey
);
585 if (!o2i_ECPublicKey(&ecpeer
, &p
, plen
))
587 pkpeer
= EVP_PKEY_new();
590 EVP_PKEY_set1_EC_KEY(pkpeer
, ecpeer
);
591 if (EVP_PKEY_derive_set_peer(pctx
, pkpeer
) > 0)
595 EVP_PKEY_free(pkpeer
);
599 /* Set KDF parameters based on KDF NID */
600 static int ecdh_cms_set_kdf_param(EVP_PKEY_CTX
*pctx
, int eckdf_nid
)
602 int kdf_nid
, kdfmd_nid
, cofactor
;
603 const EVP_MD
*kdf_md
;
604 if (eckdf_nid
== NID_undef
)
607 /* Lookup KDF type, cofactor mode and digest */
608 if (!OBJ_find_sigid_algs(eckdf_nid
, &kdfmd_nid
, &kdf_nid
))
611 if (kdf_nid
== NID_dh_std_kdf
)
613 else if (kdf_nid
== NID_dh_cofactor_kdf
)
618 if (EVP_PKEY_CTX_set_ecdh_cofactor_mode(pctx
, cofactor
) <= 0)
621 if (EVP_PKEY_CTX_set_ecdh_kdf_type(pctx
, EVP_PKEY_ECDH_KDF_X9_62
) <= 0)
624 kdf_md
= EVP_get_digestbynid(kdfmd_nid
);
628 if (EVP_PKEY_CTX_set_ecdh_kdf_md(pctx
, kdf_md
) <= 0)
633 static int ecdh_cms_set_shared_info(EVP_PKEY_CTX
*pctx
, CMS_RecipientInfo
*ri
)
637 X509_ALGOR
*alg
, *kekalg
= NULL
;
638 ASN1_OCTET_STRING
*ukm
;
639 const unsigned char *p
;
640 unsigned char *der
= NULL
;
642 const EVP_CIPHER
*kekcipher
;
643 EVP_CIPHER_CTX
*kekctx
;
645 if (!CMS_RecipientInfo_kari_get0_alg(ri
, &alg
, &ukm
))
648 if (!ecdh_cms_set_kdf_param(pctx
, OBJ_obj2nid(alg
->algorithm
))) {
649 ECerr(EC_F_ECDH_CMS_SET_SHARED_INFO
, EC_R_KDF_PARAMETER_ERROR
);
653 if (alg
->parameter
->type
!= V_ASN1_SEQUENCE
)
656 p
= alg
->parameter
->value
.sequence
->data
;
657 plen
= alg
->parameter
->value
.sequence
->length
;
658 kekalg
= d2i_X509_ALGOR(NULL
, &p
, plen
);
661 kekctx
= CMS_RecipientInfo_kari_get0_ctx(ri
);
664 kekcipher
= EVP_get_cipherbyobj(kekalg
->algorithm
);
665 if (!kekcipher
|| EVP_CIPHER_mode(kekcipher
) != EVP_CIPH_WRAP_MODE
)
667 if (!EVP_EncryptInit_ex(kekctx
, kekcipher
, NULL
, NULL
, NULL
))
669 if (EVP_CIPHER_asn1_to_param(kekctx
, kekalg
->parameter
) <= 0)
672 keylen
= EVP_CIPHER_CTX_key_length(kekctx
);
673 if (EVP_PKEY_CTX_set_ecdh_kdf_outlen(pctx
, keylen
) <= 0)
676 plen
= CMS_SharedInfo_encode(&der
, kekalg
, ukm
, keylen
);
681 if (EVP_PKEY_CTX_set0_ecdh_kdf_ukm(pctx
, der
, plen
) <= 0)
687 X509_ALGOR_free(kekalg
);
692 static int ecdh_cms_decrypt(CMS_RecipientInfo
*ri
)
695 pctx
= CMS_RecipientInfo_get0_pkey_ctx(ri
);
698 /* See if we need to set peer key */
699 if (!EVP_PKEY_CTX_get0_peerkey(pctx
)) {
701 ASN1_BIT_STRING
*pubkey
;
702 if (!CMS_RecipientInfo_kari_get0_orig_id(ri
, &alg
, &pubkey
,
707 if (!ecdh_cms_set_peerkey(pctx
, alg
, pubkey
)) {
708 ECerr(EC_F_ECDH_CMS_DECRYPT
, EC_R_PEER_KEY_ERROR
);
712 /* Set ECDH derivation parameters and initialise unwrap context */
713 if (!ecdh_cms_set_shared_info(pctx
, ri
)) {
714 ECerr(EC_F_ECDH_CMS_DECRYPT
, EC_R_SHARED_INFO_ERROR
);
720 static int ecdh_cms_encrypt(CMS_RecipientInfo
*ri
)
726 X509_ALGOR
*talg
, *wrap_alg
= NULL
;
728 ASN1_BIT_STRING
*pubkey
;
729 ASN1_STRING
*wrap_str
;
730 ASN1_OCTET_STRING
*ukm
;
731 unsigned char *penc
= NULL
;
734 int ecdh_nid
, kdf_type
, kdf_nid
, wrap_nid
;
735 const EVP_MD
*kdf_md
;
736 pctx
= CMS_RecipientInfo_get0_pkey_ctx(ri
);
739 /* Get ephemeral key */
740 pkey
= EVP_PKEY_CTX_get0_pkey(pctx
);
741 if (!CMS_RecipientInfo_kari_get0_orig_id(ri
, &talg
, &pubkey
,
744 X509_ALGOR_get0(&aoid
, NULL
, NULL
, talg
);
745 /* Is everything uninitialised? */
746 if (aoid
== OBJ_nid2obj(NID_undef
)) {
748 EC_KEY
*eckey
= pkey
->pkey
.ec
;
752 penclen
= i2o_ECPublicKey(eckey
, NULL
);
755 penc
= OPENSSL_malloc(penclen
);
759 penclen
= i2o_ECPublicKey(eckey
, &p
);
762 ASN1_STRING_set0(pubkey
, penc
, penclen
);
763 pubkey
->flags
&= ~(ASN1_STRING_FLAG_BITS_LEFT
| 0x07);
764 pubkey
->flags
|= ASN1_STRING_FLAG_BITS_LEFT
;
767 X509_ALGOR_set0(talg
, OBJ_nid2obj(NID_X9_62_id_ecPublicKey
),
771 /* See if custom parameters set */
772 kdf_type
= EVP_PKEY_CTX_get_ecdh_kdf_type(pctx
);
775 if (!EVP_PKEY_CTX_get_ecdh_kdf_md(pctx
, &kdf_md
))
777 ecdh_nid
= EVP_PKEY_CTX_get_ecdh_cofactor_mode(pctx
);
780 else if (ecdh_nid
== 0)
781 ecdh_nid
= NID_dh_std_kdf
;
782 else if (ecdh_nid
== 1)
783 ecdh_nid
= NID_dh_cofactor_kdf
;
785 if (kdf_type
== EVP_PKEY_ECDH_KDF_NONE
) {
786 kdf_type
= EVP_PKEY_ECDH_KDF_X9_62
;
787 if (EVP_PKEY_CTX_set_ecdh_kdf_type(pctx
, kdf_type
) <= 0)
792 if (kdf_md
== NULL
) {
793 /* Fixme later for better MD */
795 if (EVP_PKEY_CTX_set_ecdh_kdf_md(pctx
, kdf_md
) <= 0)
799 if (!CMS_RecipientInfo_kari_get0_alg(ri
, &talg
, &ukm
))
802 /* Lookup NID for KDF+cofactor+digest */
804 if (!OBJ_find_sigid_by_algs(&kdf_nid
, EVP_MD_type(kdf_md
), ecdh_nid
))
807 ctx
= CMS_RecipientInfo_kari_get0_ctx(ri
);
808 wrap_nid
= EVP_CIPHER_CTX_type(ctx
);
809 keylen
= EVP_CIPHER_CTX_key_length(ctx
);
811 /* Package wrap algorithm in an AlgorithmIdentifier */
813 wrap_alg
= X509_ALGOR_new();
814 if (wrap_alg
== NULL
)
816 wrap_alg
->algorithm
= OBJ_nid2obj(wrap_nid
);
817 wrap_alg
->parameter
= ASN1_TYPE_new();
818 if (wrap_alg
->parameter
== NULL
)
820 if (EVP_CIPHER_param_to_asn1(ctx
, wrap_alg
->parameter
) <= 0)
822 if (ASN1_TYPE_get(wrap_alg
->parameter
) == NID_undef
) {
823 ASN1_TYPE_free(wrap_alg
->parameter
);
824 wrap_alg
->parameter
= NULL
;
827 if (EVP_PKEY_CTX_set_ecdh_kdf_outlen(pctx
, keylen
) <= 0)
830 penclen
= CMS_SharedInfo_encode(&penc
, wrap_alg
, ukm
, keylen
);
835 if (EVP_PKEY_CTX_set0_ecdh_kdf_ukm(pctx
, penc
, penclen
) <= 0)
840 * Now need to wrap encoding of wrap AlgorithmIdentifier into parameter
841 * of another AlgorithmIdentifier.
843 penclen
= i2d_X509_ALGOR(wrap_alg
, &penc
);
844 if (!penc
|| !penclen
)
846 wrap_str
= ASN1_STRING_new();
847 if (wrap_str
== NULL
)
849 ASN1_STRING_set0(wrap_str
, penc
, penclen
);
851 X509_ALGOR_set0(talg
, OBJ_nid2obj(kdf_nid
), V_ASN1_SEQUENCE
, wrap_str
);
857 X509_ALGOR_free(wrap_alg
);