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 #include "internal/cryptlib.h"
12 #include <openssl/x509.h>
13 #include <openssl/asn1.h>
15 #include <openssl/bn.h>
16 #include "internal/asn1_int.h"
17 #include "internal/evp_int.h"
18 #include <openssl/cms.h>
21 * i2d/d2i like DH parameter functions which use the appropriate routine for
22 * PKCS#3 DH or X9.42 DH.
25 static DH
*d2i_dhp(const EVP_PKEY
*pkey
, const unsigned char **pp
,
28 if (pkey
->ameth
== &dhx_asn1_meth
)
29 return d2i_DHxparams(NULL
, pp
, length
);
30 return d2i_DHparams(NULL
, pp
, length
);
33 static int i2d_dhp(const EVP_PKEY
*pkey
, const DH
*a
, unsigned char **pp
)
35 if (pkey
->ameth
== &dhx_asn1_meth
)
36 return i2d_DHxparams(a
, pp
);
37 return i2d_DHparams(a
, pp
);
40 static void int_dh_free(EVP_PKEY
*pkey
)
42 DH_free(pkey
->pkey
.dh
);
45 static int dh_pub_decode(EVP_PKEY
*pkey
, X509_PUBKEY
*pubkey
)
47 const unsigned char *p
, *pm
;
51 const ASN1_STRING
*pstr
;
53 ASN1_INTEGER
*public_key
= NULL
;
57 if (!X509_PUBKEY_get0_param(NULL
, &p
, &pklen
, &palg
, pubkey
))
59 X509_ALGOR_get0(NULL
, &ptype
, &pval
, palg
);
61 if (ptype
!= V_ASN1_SEQUENCE
) {
62 DHerr(DH_F_DH_PUB_DECODE
, DH_R_PARAMETER_ENCODING_ERROR
);
70 if ((dh
= d2i_dhp(pkey
, &pm
, pmlen
)) == NULL
) {
71 DHerr(DH_F_DH_PUB_DECODE
, DH_R_DECODE_ERROR
);
75 if ((public_key
= d2i_ASN1_INTEGER(NULL
, &p
, pklen
)) == NULL
) {
76 DHerr(DH_F_DH_PUB_DECODE
, DH_R_DECODE_ERROR
);
80 /* We have parameters now set public key */
81 if ((dh
->pub_key
= ASN1_INTEGER_to_BN(public_key
, NULL
)) == NULL
) {
82 DHerr(DH_F_DH_PUB_DECODE
, DH_R_BN_DECODE_ERROR
);
86 ASN1_INTEGER_free(public_key
);
87 EVP_PKEY_assign(pkey
, pkey
->ameth
->pkey_id
, dh
);
91 ASN1_INTEGER_free(public_key
);
97 static int dh_pub_encode(X509_PUBKEY
*pk
, const EVP_PKEY
*pkey
)
101 unsigned char *penc
= NULL
;
104 ASN1_INTEGER
*pub_key
= NULL
;
108 str
= ASN1_STRING_new();
110 DHerr(DH_F_DH_PUB_ENCODE
, ERR_R_MALLOC_FAILURE
);
113 str
->length
= i2d_dhp(pkey
, dh
, &str
->data
);
114 if (str
->length
<= 0) {
115 DHerr(DH_F_DH_PUB_ENCODE
, ERR_R_MALLOC_FAILURE
);
118 ptype
= V_ASN1_SEQUENCE
;
120 pub_key
= BN_to_ASN1_INTEGER(dh
->pub_key
, NULL
);
124 penclen
= i2d_ASN1_INTEGER(pub_key
, &penc
);
126 ASN1_INTEGER_free(pub_key
);
129 DHerr(DH_F_DH_PUB_ENCODE
, ERR_R_MALLOC_FAILURE
);
133 if (X509_PUBKEY_set0_param(pk
, OBJ_nid2obj(pkey
->ameth
->pkey_id
),
134 ptype
, str
, penc
, penclen
))
139 ASN1_STRING_free(str
);
145 * PKCS#8 DH is defined in PKCS#11 of all places. It is similar to DH in that
146 * the AlgorithmIdentifier contains the parameters, the private key is
147 * explicitly included and the pubkey must be recalculated.
150 static int dh_priv_decode(EVP_PKEY
*pkey
, const PKCS8_PRIV_KEY_INFO
*p8
)
152 const unsigned char *p
, *pm
;
156 const ASN1_STRING
*pstr
;
157 const X509_ALGOR
*palg
;
158 ASN1_INTEGER
*privkey
= NULL
;
162 if (!PKCS8_pkey_get0(NULL
, &p
, &pklen
, &palg
, p8
))
165 X509_ALGOR_get0(NULL
, &ptype
, &pval
, palg
);
167 if (ptype
!= V_ASN1_SEQUENCE
)
169 if ((privkey
= d2i_ASN1_INTEGER(NULL
, &p
, pklen
)) == NULL
)
174 pmlen
= pstr
->length
;
175 if ((dh
= d2i_dhp(pkey
, &pm
, pmlen
)) == NULL
)
178 /* We have parameters now set private key */
179 if ((dh
->priv_key
= BN_secure_new()) == NULL
180 || !ASN1_INTEGER_to_BN(privkey
, dh
->priv_key
)) {
181 DHerr(DH_F_DH_PRIV_DECODE
, DH_R_BN_ERROR
);
184 /* Calculate public key */
185 if (!DH_generate_key(dh
))
188 EVP_PKEY_assign(pkey
, pkey
->ameth
->pkey_id
, dh
);
190 ASN1_STRING_clear_free(privkey
);
195 DHerr(DH_F_DH_PRIV_DECODE
, EVP_R_DECODE_ERROR
);
198 ASN1_STRING_clear_free(privkey
);
202 static int dh_priv_encode(PKCS8_PRIV_KEY_INFO
*p8
, const EVP_PKEY
*pkey
)
204 ASN1_STRING
*params
= NULL
;
205 ASN1_INTEGER
*prkey
= NULL
;
206 unsigned char *dp
= NULL
;
209 params
= ASN1_STRING_new();
211 if (params
== NULL
) {
212 DHerr(DH_F_DH_PRIV_ENCODE
, ERR_R_MALLOC_FAILURE
);
216 params
->length
= i2d_dhp(pkey
, pkey
->pkey
.dh
, ¶ms
->data
);
217 if (params
->length
<= 0) {
218 DHerr(DH_F_DH_PRIV_ENCODE
, ERR_R_MALLOC_FAILURE
);
221 params
->type
= V_ASN1_SEQUENCE
;
223 /* Get private key into integer */
224 prkey
= BN_to_ASN1_INTEGER(pkey
->pkey
.dh
->priv_key
, NULL
);
227 DHerr(DH_F_DH_PRIV_ENCODE
, DH_R_BN_ERROR
);
231 dplen
= i2d_ASN1_INTEGER(prkey
, &dp
);
233 ASN1_STRING_clear_free(prkey
);
236 if (!PKCS8_pkey_set0(p8
, OBJ_nid2obj(pkey
->ameth
->pkey_id
), 0,
237 V_ASN1_SEQUENCE
, params
, dp
, dplen
))
244 ASN1_STRING_free(params
);
245 ASN1_STRING_clear_free(prkey
);
249 static int dh_param_decode(EVP_PKEY
*pkey
,
250 const unsigned char **pder
, int derlen
)
254 if ((dh
= d2i_dhp(pkey
, pder
, derlen
)) == NULL
) {
255 DHerr(DH_F_DH_PARAM_DECODE
, ERR_R_DH_LIB
);
258 EVP_PKEY_assign(pkey
, pkey
->ameth
->pkey_id
, dh
);
262 static int dh_param_encode(const EVP_PKEY
*pkey
, unsigned char **pder
)
264 return i2d_dhp(pkey
, pkey
->pkey
.dh
, pder
);
267 static int do_dh_print(BIO
*bp
, const DH
*x
, int indent
, int ptype
)
269 int reason
= ERR_R_BUF_LIB
;
270 const char *ktype
= NULL
;
271 BIGNUM
*priv_key
, *pub_key
;
274 priv_key
= x
->priv_key
;
279 pub_key
= x
->pub_key
;
283 if (x
->p
== NULL
|| (ptype
== 2 && priv_key
== NULL
)
284 || (ptype
> 0 && pub_key
== NULL
)) {
285 reason
= ERR_R_PASSED_NULL_PARAMETER
;
290 ktype
= "DH Private-Key";
292 ktype
= "DH Public-Key";
294 ktype
= "DH Parameters";
296 BIO_indent(bp
, indent
, 128);
297 if (BIO_printf(bp
, "%s: (%d bit)\n", ktype
, BN_num_bits(x
->p
)) <= 0)
301 if (!ASN1_bn_print(bp
, "private-key:", priv_key
, NULL
, indent
))
303 if (!ASN1_bn_print(bp
, "public-key:", pub_key
, NULL
, indent
))
306 if (!ASN1_bn_print(bp
, "prime:", x
->p
, NULL
, indent
))
308 if (!ASN1_bn_print(bp
, "generator:", x
->g
, NULL
, indent
))
310 if (x
->q
&& !ASN1_bn_print(bp
, "subgroup order:", x
->q
, NULL
, indent
))
312 if (x
->j
&& !ASN1_bn_print(bp
, "subgroup factor:", x
->j
, NULL
, indent
))
316 BIO_indent(bp
, indent
, 128);
317 BIO_puts(bp
, "seed:");
318 for (i
= 0; i
< x
->seedlen
; i
++) {
320 if (BIO_puts(bp
, "\n") <= 0
321 || !BIO_indent(bp
, indent
+ 4, 128))
324 if (BIO_printf(bp
, "%02x%s", x
->seed
[i
],
325 ((i
+ 1) == x
->seedlen
) ? "" : ":") <= 0)
328 if (BIO_write(bp
, "\n", 1) <= 0)
331 if (x
->counter
&& !ASN1_bn_print(bp
, "counter:", x
->counter
, NULL
, indent
))
333 if (x
->length
!= 0) {
334 BIO_indent(bp
, indent
, 128);
335 if (BIO_printf(bp
, "recommended-private-length: %d bits\n",
336 (int)x
->length
) <= 0)
343 DHerr(DH_F_DO_DH_PRINT
, reason
);
347 static int int_dh_size(const EVP_PKEY
*pkey
)
349 return DH_size(pkey
->pkey
.dh
);
352 static int dh_bits(const EVP_PKEY
*pkey
)
354 return BN_num_bits(pkey
->pkey
.dh
->p
);
357 static int dh_security_bits(const EVP_PKEY
*pkey
)
359 return DH_security_bits(pkey
->pkey
.dh
);
362 static int dh_cmp_parameters(const EVP_PKEY
*a
, const EVP_PKEY
*b
)
364 if (BN_cmp(a
->pkey
.dh
->p
, b
->pkey
.dh
->p
) ||
365 BN_cmp(a
->pkey
.dh
->g
, b
->pkey
.dh
->g
))
367 else if (a
->ameth
== &dhx_asn1_meth
) {
368 if (BN_cmp(a
->pkey
.dh
->q
, b
->pkey
.dh
->q
))
374 static int int_dh_bn_cpy(BIGNUM
**dst
, const BIGNUM
*src
)
379 * If source is read only just copy the pointer, so
380 * we don't have to reallocate it.
384 else if (BN_get_flags(src
, BN_FLG_STATIC_DATA
)
385 && !BN_get_flags(src
, BN_FLG_MALLOCED
))
387 else if ((a
= BN_dup(src
)) == NULL
)
394 static int int_dh_param_copy(DH
*to
, const DH
*from
, int is_x942
)
397 is_x942
= ! !from
->q
;
398 if (!int_dh_bn_cpy(&to
->p
, from
->p
))
400 if (!int_dh_bn_cpy(&to
->g
, from
->g
))
403 if (!int_dh_bn_cpy(&to
->q
, from
->q
))
405 if (!int_dh_bn_cpy(&to
->j
, from
->j
))
407 OPENSSL_free(to
->seed
);
411 to
->seed
= OPENSSL_memdup(from
->seed
, from
->seedlen
);
414 to
->seedlen
= from
->seedlen
;
417 to
->length
= from
->length
;
421 DH
*DHparams_dup(const DH
*dh
)
427 if (!int_dh_param_copy(ret
, dh
, -1)) {
434 static int dh_copy_parameters(EVP_PKEY
*to
, const EVP_PKEY
*from
)
436 if (to
->pkey
.dh
== NULL
) {
437 to
->pkey
.dh
= DH_new();
438 if (to
->pkey
.dh
== NULL
)
441 return int_dh_param_copy(to
->pkey
.dh
, from
->pkey
.dh
,
442 from
->ameth
== &dhx_asn1_meth
);
445 static int dh_missing_parameters(const EVP_PKEY
*a
)
447 if (a
->pkey
.dh
== NULL
|| a
->pkey
.dh
->p
== NULL
|| a
->pkey
.dh
->g
== NULL
)
452 static int dh_pub_cmp(const EVP_PKEY
*a
, const EVP_PKEY
*b
)
454 if (dh_cmp_parameters(a
, b
) == 0)
456 if (BN_cmp(b
->pkey
.dh
->pub_key
, a
->pkey
.dh
->pub_key
) != 0)
462 static int dh_param_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
465 return do_dh_print(bp
, pkey
->pkey
.dh
, indent
, 0);
468 static int dh_public_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
471 return do_dh_print(bp
, pkey
->pkey
.dh
, indent
, 1);
474 static int dh_private_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
477 return do_dh_print(bp
, pkey
->pkey
.dh
, indent
, 2);
480 int DHparams_print(BIO
*bp
, const DH
*x
)
482 return do_dh_print(bp
, x
, 4, 0);
485 #ifndef OPENSSL_NO_CMS
486 static int dh_cms_decrypt(CMS_RecipientInfo
*ri
);
487 static int dh_cms_encrypt(CMS_RecipientInfo
*ri
);
490 static int dh_pkey_ctrl(EVP_PKEY
*pkey
, int op
, long arg1
, void *arg2
)
493 case ASN1_PKEY_CTRL_SET1_TLS_ENCPT
:
494 return dh_buf2key(EVP_PKEY_get0_DH(pkey
), arg2
, arg1
);
495 case ASN1_PKEY_CTRL_GET1_TLS_ENCPT
:
496 return dh_key2buf(EVP_PKEY_get0_DH(pkey
), arg2
);
502 static int dhx_pkey_ctrl(EVP_PKEY
*pkey
, int op
, long arg1
, void *arg2
)
505 #ifndef OPENSSL_NO_CMS
507 case ASN1_PKEY_CTRL_CMS_ENVELOPE
:
509 return dh_cms_decrypt(arg2
);
511 return dh_cms_encrypt(arg2
);
514 case ASN1_PKEY_CTRL_CMS_RI_TYPE
:
515 *(int *)arg2
= CMS_RECIPINFO_AGREE
;
524 static int dh_pkey_public_check(const EVP_PKEY
*pkey
)
526 DH
*dh
= pkey
->pkey
.dh
;
528 if (dh
->pub_key
== NULL
) {
529 DHerr(DH_F_DH_PKEY_PUBLIC_CHECK
, DH_R_MISSING_PUBKEY
);
533 return DH_check_pub_key_ex(dh
, dh
->pub_key
);
536 static int dh_pkey_param_check(const EVP_PKEY
*pkey
)
538 DH
*dh
= pkey
->pkey
.dh
;
540 return DH_check_ex(dh
);
543 const EVP_PKEY_ASN1_METHOD dh_asn1_meth
= {
549 "OpenSSL PKCS#3 DH method",
566 dh_missing_parameters
,
578 dh_pkey_public_check
,
582 const EVP_PKEY_ASN1_METHOD dhx_asn1_meth
= {
588 "OpenSSL X9.42 DH method",
605 dh_missing_parameters
,
617 dh_pkey_public_check
,
621 #ifndef OPENSSL_NO_CMS
623 static int dh_cms_set_peerkey(EVP_PKEY_CTX
*pctx
,
624 X509_ALGOR
*alg
, ASN1_BIT_STRING
*pubkey
)
626 const ASN1_OBJECT
*aoid
;
629 ASN1_INTEGER
*public_key
= NULL
;
631 EVP_PKEY
*pkpeer
= NULL
, *pk
= NULL
;
633 const unsigned char *p
;
636 X509_ALGOR_get0(&aoid
, &atype
, &aval
, alg
);
637 if (OBJ_obj2nid(aoid
) != NID_dhpublicnumber
)
639 /* Only absent parameters allowed in RFC XXXX */
640 if (atype
!= V_ASN1_UNDEF
&& atype
== V_ASN1_NULL
)
643 pk
= EVP_PKEY_CTX_get0_pkey(pctx
);
646 if (pk
->type
!= EVP_PKEY_DHX
)
648 /* Get parameters from parent key */
649 dhpeer
= DHparams_dup(pk
->pkey
.dh
);
650 /* We have parameters now set public key */
651 plen
= ASN1_STRING_length(pubkey
);
652 p
= ASN1_STRING_get0_data(pubkey
);
656 if ((public_key
= d2i_ASN1_INTEGER(NULL
, &p
, plen
)) == NULL
) {
657 DHerr(DH_F_DH_CMS_SET_PEERKEY
, DH_R_DECODE_ERROR
);
661 /* We have parameters now set public key */
662 if ((dhpeer
->pub_key
= ASN1_INTEGER_to_BN(public_key
, NULL
)) == NULL
) {
663 DHerr(DH_F_DH_CMS_SET_PEERKEY
, DH_R_BN_DECODE_ERROR
);
667 pkpeer
= EVP_PKEY_new();
670 EVP_PKEY_assign(pkpeer
, pk
->ameth
->pkey_id
, dhpeer
);
672 if (EVP_PKEY_derive_set_peer(pctx
, pkpeer
) > 0)
675 ASN1_INTEGER_free(public_key
);
676 EVP_PKEY_free(pkpeer
);
681 static int dh_cms_set_shared_info(EVP_PKEY_CTX
*pctx
, CMS_RecipientInfo
*ri
)
685 X509_ALGOR
*alg
, *kekalg
= NULL
;
686 ASN1_OCTET_STRING
*ukm
;
687 const unsigned char *p
;
688 unsigned char *dukm
= NULL
;
691 const EVP_CIPHER
*kekcipher
;
692 EVP_CIPHER_CTX
*kekctx
;
694 if (!CMS_RecipientInfo_kari_get0_alg(ri
, &alg
, &ukm
))
698 * For DH we only have one OID permissible. If ever any more get defined
699 * we will need something cleverer.
701 if (OBJ_obj2nid(alg
->algorithm
) != NID_id_smime_alg_ESDH
) {
702 DHerr(DH_F_DH_CMS_SET_SHARED_INFO
, DH_R_KDF_PARAMETER_ERROR
);
706 if (EVP_PKEY_CTX_set_dh_kdf_type(pctx
, EVP_PKEY_DH_KDF_X9_42
) <= 0)
709 if (EVP_PKEY_CTX_set_dh_kdf_md(pctx
, EVP_sha1()) <= 0)
712 if (alg
->parameter
->type
!= V_ASN1_SEQUENCE
)
715 p
= alg
->parameter
->value
.sequence
->data
;
716 plen
= alg
->parameter
->value
.sequence
->length
;
717 kekalg
= d2i_X509_ALGOR(NULL
, &p
, plen
);
720 kekctx
= CMS_RecipientInfo_kari_get0_ctx(ri
);
723 kekcipher
= EVP_get_cipherbyobj(kekalg
->algorithm
);
724 if (!kekcipher
|| EVP_CIPHER_mode(kekcipher
) != EVP_CIPH_WRAP_MODE
)
726 if (!EVP_EncryptInit_ex(kekctx
, kekcipher
, NULL
, NULL
, NULL
))
728 if (EVP_CIPHER_asn1_to_param(kekctx
, kekalg
->parameter
) <= 0)
731 keylen
= EVP_CIPHER_CTX_key_length(kekctx
);
732 if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx
, keylen
) <= 0)
734 /* Use OBJ_nid2obj to ensure we use built in OID that isn't freed */
735 if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx
,
736 OBJ_nid2obj(EVP_CIPHER_type(kekcipher
)))
741 dukmlen
= ASN1_STRING_length(ukm
);
742 dukm
= OPENSSL_memdup(ASN1_STRING_get0_data(ukm
), dukmlen
);
747 if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx
, dukm
, dukmlen
) <= 0)
753 X509_ALGOR_free(kekalg
);
758 static int dh_cms_decrypt(CMS_RecipientInfo
*ri
)
761 pctx
= CMS_RecipientInfo_get0_pkey_ctx(ri
);
764 /* See if we need to set peer key */
765 if (!EVP_PKEY_CTX_get0_peerkey(pctx
)) {
767 ASN1_BIT_STRING
*pubkey
;
768 if (!CMS_RecipientInfo_kari_get0_orig_id(ri
, &alg
, &pubkey
,
773 if (!dh_cms_set_peerkey(pctx
, alg
, pubkey
)) {
774 DHerr(DH_F_DH_CMS_DECRYPT
, DH_R_PEER_KEY_ERROR
);
778 /* Set DH derivation parameters and initialise unwrap context */
779 if (!dh_cms_set_shared_info(pctx
, ri
)) {
780 DHerr(DH_F_DH_CMS_DECRYPT
, DH_R_SHARED_INFO_ERROR
);
786 static int dh_cms_encrypt(CMS_RecipientInfo
*ri
)
792 X509_ALGOR
*talg
, *wrap_alg
= NULL
;
793 const ASN1_OBJECT
*aoid
;
794 ASN1_BIT_STRING
*pubkey
;
795 ASN1_STRING
*wrap_str
;
796 ASN1_OCTET_STRING
*ukm
;
797 unsigned char *penc
= NULL
, *dukm
= NULL
;
801 int kdf_type
, wrap_nid
;
802 const EVP_MD
*kdf_md
;
803 pctx
= CMS_RecipientInfo_get0_pkey_ctx(ri
);
806 /* Get ephemeral key */
807 pkey
= EVP_PKEY_CTX_get0_pkey(pctx
);
808 if (!CMS_RecipientInfo_kari_get0_orig_id(ri
, &talg
, &pubkey
,
811 X509_ALGOR_get0(&aoid
, NULL
, NULL
, talg
);
812 /* Is everything uninitialised? */
813 if (aoid
== OBJ_nid2obj(NID_undef
)) {
814 ASN1_INTEGER
*pubk
= BN_to_ASN1_INTEGER(pkey
->pkey
.dh
->pub_key
, NULL
);
819 penclen
= i2d_ASN1_INTEGER(pubk
, &penc
);
820 ASN1_INTEGER_free(pubk
);
823 ASN1_STRING_set0(pubkey
, penc
, penclen
);
824 pubkey
->flags
&= ~(ASN1_STRING_FLAG_BITS_LEFT
| 0x07);
825 pubkey
->flags
|= ASN1_STRING_FLAG_BITS_LEFT
;
828 X509_ALGOR_set0(talg
, OBJ_nid2obj(NID_dhpublicnumber
),
832 /* See if custom parameters set */
833 kdf_type
= EVP_PKEY_CTX_get_dh_kdf_type(pctx
);
836 if (!EVP_PKEY_CTX_get_dh_kdf_md(pctx
, &kdf_md
))
839 if (kdf_type
== EVP_PKEY_DH_KDF_NONE
) {
840 kdf_type
= EVP_PKEY_DH_KDF_X9_42
;
841 if (EVP_PKEY_CTX_set_dh_kdf_type(pctx
, kdf_type
) <= 0)
843 } else if (kdf_type
!= EVP_PKEY_DH_KDF_X9_42
)
846 if (kdf_md
== NULL
) {
847 /* Only SHA1 supported */
849 if (EVP_PKEY_CTX_set_dh_kdf_md(pctx
, kdf_md
) <= 0)
851 } else if (EVP_MD_type(kdf_md
) != NID_sha1
)
852 /* Unsupported digest */
855 if (!CMS_RecipientInfo_kari_get0_alg(ri
, &talg
, &ukm
))
859 ctx
= CMS_RecipientInfo_kari_get0_ctx(ri
);
860 wrap_nid
= EVP_CIPHER_CTX_type(ctx
);
861 if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx
, OBJ_nid2obj(wrap_nid
)) <= 0)
863 keylen
= EVP_CIPHER_CTX_key_length(ctx
);
865 /* Package wrap algorithm in an AlgorithmIdentifier */
867 wrap_alg
= X509_ALGOR_new();
868 if (wrap_alg
== NULL
)
870 wrap_alg
->algorithm
= OBJ_nid2obj(wrap_nid
);
871 wrap_alg
->parameter
= ASN1_TYPE_new();
872 if (wrap_alg
->parameter
== NULL
)
874 if (EVP_CIPHER_param_to_asn1(ctx
, wrap_alg
->parameter
) <= 0)
876 if (ASN1_TYPE_get(wrap_alg
->parameter
) == NID_undef
) {
877 ASN1_TYPE_free(wrap_alg
->parameter
);
878 wrap_alg
->parameter
= NULL
;
881 if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx
, keylen
) <= 0)
885 dukmlen
= ASN1_STRING_length(ukm
);
886 dukm
= OPENSSL_memdup(ASN1_STRING_get0_data(ukm
), dukmlen
);
891 if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx
, dukm
, dukmlen
) <= 0)
896 * Now need to wrap encoding of wrap AlgorithmIdentifier into parameter
897 * of another AlgorithmIdentifier.
900 penclen
= i2d_X509_ALGOR(wrap_alg
, &penc
);
901 if (!penc
|| !penclen
)
903 wrap_str
= ASN1_STRING_new();
904 if (wrap_str
== NULL
)
906 ASN1_STRING_set0(wrap_str
, penc
, penclen
);
908 X509_ALGOR_set0(talg
, OBJ_nid2obj(NID_id_smime_alg_ESDH
),
909 V_ASN1_SEQUENCE
, wrap_str
);
915 X509_ALGOR_free(wrap_alg
);