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/asn1.h>
63 #include <openssl/dh.h>
64 #include <openssl/bn.h>
65 #include "internal/asn1_int.h"
66 #include "internal/evp_int.h"
67 #ifndef OPENSSL_NO_CMS
68 # include <openssl/cms.h>
72 * i2d/d2i like DH parameter functions which use the appropriate routine for
73 * PKCS#3 DH or X9.42 DH.
76 static DH
*d2i_dhp(const EVP_PKEY
*pkey
, const unsigned char **pp
,
79 if (pkey
->ameth
== &dhx_asn1_meth
)
80 return d2i_DHxparams(NULL
, pp
, length
);
81 return d2i_DHparams(NULL
, pp
, length
);
84 static int i2d_dhp(const EVP_PKEY
*pkey
, const DH
*a
, unsigned char **pp
)
86 if (pkey
->ameth
== &dhx_asn1_meth
)
87 return i2d_DHxparams(a
, pp
);
88 return i2d_DHparams(a
, pp
);
91 static void int_dh_free(EVP_PKEY
*pkey
)
93 DH_free(pkey
->pkey
.dh
);
96 static int dh_pub_decode(EVP_PKEY
*pkey
, X509_PUBKEY
*pubkey
)
98 const unsigned char *p
, *pm
;
104 ASN1_INTEGER
*public_key
= NULL
;
108 if (!X509_PUBKEY_get0_param(NULL
, &p
, &pklen
, &palg
, pubkey
))
110 X509_ALGOR_get0(NULL
, &ptype
, &pval
, palg
);
112 if (ptype
!= V_ASN1_SEQUENCE
) {
113 DHerr(DH_F_DH_PUB_DECODE
, DH_R_PARAMETER_ENCODING_ERROR
);
119 pmlen
= pstr
->length
;
121 if ((dh
= d2i_dhp(pkey
, &pm
, pmlen
)) == NULL
) {
122 DHerr(DH_F_DH_PUB_DECODE
, DH_R_DECODE_ERROR
);
126 if ((public_key
= d2i_ASN1_INTEGER(NULL
, &p
, pklen
)) == NULL
) {
127 DHerr(DH_F_DH_PUB_DECODE
, DH_R_DECODE_ERROR
);
131 /* We have parameters now set public key */
132 if ((dh
->pub_key
= ASN1_INTEGER_to_BN(public_key
, NULL
)) == NULL
) {
133 DHerr(DH_F_DH_PUB_DECODE
, DH_R_BN_DECODE_ERROR
);
137 ASN1_INTEGER_free(public_key
);
138 EVP_PKEY_assign(pkey
, pkey
->ameth
->pkey_id
, dh
);
142 ASN1_INTEGER_free(public_key
);
148 static int dh_pub_encode(X509_PUBKEY
*pk
, const EVP_PKEY
*pkey
)
152 unsigned char *penc
= NULL
;
155 ASN1_INTEGER
*pub_key
= NULL
;
159 str
= ASN1_STRING_new();
161 DHerr(DH_F_DH_PUB_ENCODE
, ERR_R_MALLOC_FAILURE
);
164 str
->length
= i2d_dhp(pkey
, dh
, &str
->data
);
165 if (str
->length
<= 0) {
166 DHerr(DH_F_DH_PUB_ENCODE
, ERR_R_MALLOC_FAILURE
);
169 ptype
= V_ASN1_SEQUENCE
;
171 pub_key
= BN_to_ASN1_INTEGER(dh
->pub_key
, NULL
);
175 penclen
= i2d_ASN1_INTEGER(pub_key
, &penc
);
177 ASN1_INTEGER_free(pub_key
);
180 DHerr(DH_F_DH_PUB_ENCODE
, ERR_R_MALLOC_FAILURE
);
184 if (X509_PUBKEY_set0_param(pk
, OBJ_nid2obj(pkey
->ameth
->pkey_id
),
185 ptype
, str
, penc
, penclen
))
190 ASN1_STRING_free(str
);
196 * PKCS#8 DH is defined in PKCS#11 of all places. It is similar to DH in that
197 * the AlgorithmIdentifier contains the parameters, the private key is
198 * explicitly included and the pubkey must be recalculated.
201 static int dh_priv_decode(EVP_PKEY
*pkey
, PKCS8_PRIV_KEY_INFO
*p8
)
203 const unsigned char *p
, *pm
;
209 ASN1_INTEGER
*privkey
= NULL
;
213 if (!PKCS8_pkey_get0(NULL
, &p
, &pklen
, &palg
, p8
))
216 X509_ALGOR_get0(NULL
, &ptype
, &pval
, palg
);
218 if (ptype
!= V_ASN1_SEQUENCE
)
220 if ((privkey
= d2i_ASN1_INTEGER(NULL
, &p
, pklen
)) == NULL
)
225 pmlen
= pstr
->length
;
226 if ((dh
= d2i_dhp(pkey
, &pm
, pmlen
)) == NULL
)
229 /* We have parameters now set private key */
230 if ((dh
->priv_key
= BN_secure_new()) == NULL
231 || !ASN1_INTEGER_to_BN(privkey
, dh
->priv_key
)) {
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();
262 if (params
== NULL
) {
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 int dh_param_decode(EVP_PKEY
*pkey
,
301 const unsigned char **pder
, int derlen
)
305 if ((dh
= d2i_dhp(pkey
, pder
, derlen
)) == NULL
) {
306 DHerr(DH_F_DH_PARAM_DECODE
, ERR_R_DH_LIB
);
309 EVP_PKEY_assign(pkey
, pkey
->ameth
->pkey_id
, dh
);
313 static int dh_param_encode(const EVP_PKEY
*pkey
, unsigned char **pder
)
315 return i2d_dhp(pkey
, pkey
->pkey
.dh
, pder
);
318 static int do_dh_print(BIO
*bp
, const DH
*x
, int indent
, int ptype
)
320 int reason
= ERR_R_BUF_LIB
;
321 const char *ktype
= NULL
;
322 BIGNUM
*priv_key
, *pub_key
;
325 priv_key
= x
->priv_key
;
330 pub_key
= x
->pub_key
;
334 if (priv_key
== NULL
&& pub_key
== NULL
) {
335 reason
= ERR_R_PASSED_NULL_PARAMETER
;
340 ktype
= "DH Private-Key";
342 ktype
= "DH Public-Key";
344 ktype
= "DH Parameters";
346 BIO_indent(bp
, indent
, 128);
347 if (BIO_printf(bp
, "%s: (%d bit)\n", ktype
, BN_num_bits(x
->p
)) <= 0)
351 if (!ASN1_bn_print(bp
, "private-key:", priv_key
, NULL
, indent
))
353 if (!ASN1_bn_print(bp
, "public-key:", pub_key
, NULL
, indent
))
356 if (!ASN1_bn_print(bp
, "prime:", x
->p
, NULL
, indent
))
358 if (!ASN1_bn_print(bp
, "generator:", x
->g
, NULL
, indent
))
360 if (x
->q
&& !ASN1_bn_print(bp
, "subgroup order:", x
->q
, NULL
, indent
))
362 if (x
->j
&& !ASN1_bn_print(bp
, "subgroup factor:", x
->j
, NULL
, indent
))
366 BIO_indent(bp
, indent
, 128);
367 BIO_puts(bp
, "seed:");
368 for (i
= 0; i
< x
->seedlen
; i
++) {
370 if (BIO_puts(bp
, "\n") <= 0
371 || !BIO_indent(bp
, indent
+ 4, 128))
374 if (BIO_printf(bp
, "%02x%s", x
->seed
[i
],
375 ((i
+ 1) == x
->seedlen
) ? "" : ":") <= 0)
378 if (BIO_write(bp
, "\n", 1) <= 0)
381 if (x
->counter
&& !ASN1_bn_print(bp
, "counter:", x
->counter
, NULL
, indent
))
383 if (x
->length
!= 0) {
384 BIO_indent(bp
, indent
, 128);
385 if (BIO_printf(bp
, "recommended-private-length: %d bits\n",
386 (int)x
->length
) <= 0)
393 DHerr(DH_F_DO_DH_PRINT
, reason
);
397 static int int_dh_size(const EVP_PKEY
*pkey
)
399 return (DH_size(pkey
->pkey
.dh
));
402 static int dh_bits(const EVP_PKEY
*pkey
)
404 return BN_num_bits(pkey
->pkey
.dh
->p
);
407 static int dh_security_bits(const EVP_PKEY
*pkey
)
409 return DH_security_bits(pkey
->pkey
.dh
);
412 static int dh_cmp_parameters(const EVP_PKEY
*a
, const EVP_PKEY
*b
)
414 if (BN_cmp(a
->pkey
.dh
->p
, b
->pkey
.dh
->p
) ||
415 BN_cmp(a
->pkey
.dh
->g
, b
->pkey
.dh
->g
))
417 else if (a
->ameth
== &dhx_asn1_meth
) {
418 if (BN_cmp(a
->pkey
.dh
->q
, b
->pkey
.dh
->q
))
424 static int int_dh_bn_cpy(BIGNUM
**dst
, const BIGNUM
*src
)
438 static int int_dh_param_copy(DH
*to
, const DH
*from
, int is_x942
)
441 is_x942
= ! !from
->q
;
442 if (!int_dh_bn_cpy(&to
->p
, from
->p
))
444 if (!int_dh_bn_cpy(&to
->g
, from
->g
))
447 if (!int_dh_bn_cpy(&to
->q
, from
->q
))
449 if (!int_dh_bn_cpy(&to
->j
, from
->j
))
451 OPENSSL_free(to
->seed
);
455 to
->seed
= OPENSSL_memdup(from
->seed
, from
->seedlen
);
458 to
->seedlen
= from
->seedlen
;
461 to
->length
= from
->length
;
465 DH
*DHparams_dup(DH
*dh
)
471 if (!int_dh_param_copy(ret
, dh
, -1)) {
478 static int dh_copy_parameters(EVP_PKEY
*to
, const EVP_PKEY
*from
)
480 if (to
->pkey
.dh
== NULL
) {
481 to
->pkey
.dh
= DH_new();
482 if (to
->pkey
.dh
== NULL
)
485 return int_dh_param_copy(to
->pkey
.dh
, from
->pkey
.dh
,
486 from
->ameth
== &dhx_asn1_meth
);
489 static int dh_missing_parameters(const EVP_PKEY
*a
)
491 if (!a
->pkey
.dh
->p
|| !a
->pkey
.dh
->g
)
496 static int dh_pub_cmp(const EVP_PKEY
*a
, const EVP_PKEY
*b
)
498 if (dh_cmp_parameters(a
, b
) == 0)
500 if (BN_cmp(b
->pkey
.dh
->pub_key
, a
->pkey
.dh
->pub_key
) != 0)
506 static int dh_param_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
509 return do_dh_print(bp
, pkey
->pkey
.dh
, indent
, 0);
512 static int dh_public_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
515 return do_dh_print(bp
, pkey
->pkey
.dh
, indent
, 1);
518 static int dh_private_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
521 return do_dh_print(bp
, pkey
->pkey
.dh
, indent
, 2);
524 int DHparams_print(BIO
*bp
, const DH
*x
)
526 return do_dh_print(bp
, x
, 4, 0);
529 #ifndef OPENSSL_NO_CMS
530 static int dh_cms_decrypt(CMS_RecipientInfo
*ri
);
531 static int dh_cms_encrypt(CMS_RecipientInfo
*ri
);
534 static int dh_pkey_ctrl(EVP_PKEY
*pkey
, int op
, long arg1
, void *arg2
)
537 #ifndef OPENSSL_NO_CMS
539 case ASN1_PKEY_CTRL_CMS_ENVELOPE
:
541 return dh_cms_decrypt(arg2
);
543 return dh_cms_encrypt(arg2
);
546 case ASN1_PKEY_CTRL_CMS_RI_TYPE
:
547 *(int *)arg2
= CMS_RECIPINFO_AGREE
;
556 const EVP_PKEY_ASN1_METHOD dh_asn1_meth
= {
562 "OpenSSL PKCS#3 DH method",
579 dh_missing_parameters
,
589 const EVP_PKEY_ASN1_METHOD dhx_asn1_meth
= {
595 "OpenSSL X9.42 DH method",
612 dh_missing_parameters
,
622 #ifndef OPENSSL_NO_CMS
624 static int dh_cms_set_peerkey(EVP_PKEY_CTX
*pctx
,
625 X509_ALGOR
*alg
, ASN1_BIT_STRING
*pubkey
)
630 ASN1_INTEGER
*public_key
= NULL
;
632 EVP_PKEY
*pkpeer
= NULL
, *pk
= NULL
;
634 const unsigned char *p
;
637 X509_ALGOR_get0(&aoid
, &atype
, &aval
, alg
);
638 if (OBJ_obj2nid(aoid
) != NID_dhpublicnumber
)
640 /* Only absent parameters allowed in RFC XXXX */
641 if (atype
!= V_ASN1_UNDEF
&& atype
== V_ASN1_NULL
)
644 pk
= EVP_PKEY_CTX_get0_pkey(pctx
);
647 if (pk
->type
!= EVP_PKEY_DHX
)
649 /* Get parameters from parent key */
650 dhpeer
= DHparams_dup(pk
->pkey
.dh
);
651 /* We have parameters now set public key */
652 plen
= ASN1_STRING_length(pubkey
);
653 p
= ASN1_STRING_data(pubkey
);
657 if ((public_key
= d2i_ASN1_INTEGER(NULL
, &p
, plen
)) == NULL
) {
658 DHerr(DH_F_DH_CMS_SET_PEERKEY
, DH_R_DECODE_ERROR
);
662 /* We have parameters now set public key */
663 if ((dhpeer
->pub_key
= ASN1_INTEGER_to_BN(public_key
, NULL
)) == NULL
) {
664 DHerr(DH_F_DH_CMS_SET_PEERKEY
, DH_R_BN_DECODE_ERROR
);
668 pkpeer
= EVP_PKEY_new();
671 EVP_PKEY_assign(pkpeer
, pk
->ameth
->pkey_id
, dhpeer
);
673 if (EVP_PKEY_derive_set_peer(pctx
, pkpeer
) > 0)
676 ASN1_INTEGER_free(public_key
);
677 EVP_PKEY_free(pkpeer
);
682 static int dh_cms_set_shared_info(EVP_PKEY_CTX
*pctx
, CMS_RecipientInfo
*ri
)
686 X509_ALGOR
*alg
, *kekalg
= NULL
;
687 ASN1_OCTET_STRING
*ukm
;
688 const unsigned char *p
;
689 unsigned char *dukm
= NULL
;
692 const EVP_CIPHER
*kekcipher
;
693 EVP_CIPHER_CTX
*kekctx
;
695 if (!CMS_RecipientInfo_kari_get0_alg(ri
, &alg
, &ukm
))
699 * For DH we only have one OID permissible. If ever any more get defined
700 * we will need something cleverer.
702 if (OBJ_obj2nid(alg
->algorithm
) != NID_id_smime_alg_ESDH
) {
703 DHerr(DH_F_DH_CMS_SET_SHARED_INFO
, DH_R_KDF_PARAMETER_ERROR
);
707 if (EVP_PKEY_CTX_set_dh_kdf_type(pctx
, EVP_PKEY_DH_KDF_X9_42
) <= 0)
710 if (EVP_PKEY_CTX_set_dh_kdf_md(pctx
, EVP_sha1()) <= 0)
713 if (alg
->parameter
->type
!= V_ASN1_SEQUENCE
)
716 p
= alg
->parameter
->value
.sequence
->data
;
717 plen
= alg
->parameter
->value
.sequence
->length
;
718 kekalg
= d2i_X509_ALGOR(NULL
, &p
, plen
);
721 kekctx
= CMS_RecipientInfo_kari_get0_ctx(ri
);
724 kekcipher
= EVP_get_cipherbyobj(kekalg
->algorithm
);
725 if (!kekcipher
|| EVP_CIPHER_mode(kekcipher
) != EVP_CIPH_WRAP_MODE
)
727 if (!EVP_EncryptInit_ex(kekctx
, kekcipher
, NULL
, NULL
, NULL
))
729 if (EVP_CIPHER_asn1_to_param(kekctx
, kekalg
->parameter
) <= 0)
732 keylen
= EVP_CIPHER_CTX_key_length(kekctx
);
733 if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx
, keylen
) <= 0)
735 /* Use OBJ_nid2obj to ensure we use built in OID that isn't freed */
736 if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx
,
737 OBJ_nid2obj(EVP_CIPHER_type(kekcipher
)))
742 dukmlen
= ASN1_STRING_length(ukm
);
743 dukm
= OPENSSL_memdup(ASN1_STRING_data(ukm
), dukmlen
);
748 if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx
, dukm
, dukmlen
) <= 0)
754 X509_ALGOR_free(kekalg
);
759 static int dh_cms_decrypt(CMS_RecipientInfo
*ri
)
762 pctx
= CMS_RecipientInfo_get0_pkey_ctx(ri
);
765 /* See if we need to set peer key */
766 if (!EVP_PKEY_CTX_get0_peerkey(pctx
)) {
768 ASN1_BIT_STRING
*pubkey
;
769 if (!CMS_RecipientInfo_kari_get0_orig_id(ri
, &alg
, &pubkey
,
774 if (!dh_cms_set_peerkey(pctx
, alg
, pubkey
)) {
775 DHerr(DH_F_DH_CMS_DECRYPT
, DH_R_PEER_KEY_ERROR
);
779 /* Set DH derivation parameters and initialise unwrap context */
780 if (!dh_cms_set_shared_info(pctx
, ri
)) {
781 DHerr(DH_F_DH_CMS_DECRYPT
, DH_R_SHARED_INFO_ERROR
);
787 static int dh_cms_encrypt(CMS_RecipientInfo
*ri
)
793 X509_ALGOR
*talg
, *wrap_alg
= NULL
;
795 ASN1_BIT_STRING
*pubkey
;
796 ASN1_STRING
*wrap_str
;
797 ASN1_OCTET_STRING
*ukm
;
798 unsigned char *penc
= NULL
, *dukm
= NULL
;
802 int kdf_type
, wrap_nid
;
803 const EVP_MD
*kdf_md
;
804 pctx
= CMS_RecipientInfo_get0_pkey_ctx(ri
);
807 /* Get ephemeral key */
808 pkey
= EVP_PKEY_CTX_get0_pkey(pctx
);
809 if (!CMS_RecipientInfo_kari_get0_orig_id(ri
, &talg
, &pubkey
,
812 X509_ALGOR_get0(&aoid
, NULL
, NULL
, talg
);
813 /* Is everything uninitialised? */
814 if (aoid
== OBJ_nid2obj(NID_undef
)) {
815 ASN1_INTEGER
*pubk
= BN_to_ASN1_INTEGER(pkey
->pkey
.dh
->pub_key
, NULL
);
820 penclen
= i2d_ASN1_INTEGER(pubk
, &penc
);
821 ASN1_INTEGER_free(pubk
);
824 ASN1_STRING_set0(pubkey
, penc
, penclen
);
825 pubkey
->flags
&= ~(ASN1_STRING_FLAG_BITS_LEFT
| 0x07);
826 pubkey
->flags
|= ASN1_STRING_FLAG_BITS_LEFT
;
829 X509_ALGOR_set0(talg
, OBJ_nid2obj(NID_dhpublicnumber
),
833 /* See if custom parameters set */
834 kdf_type
= EVP_PKEY_CTX_get_dh_kdf_type(pctx
);
837 if (!EVP_PKEY_CTX_get_dh_kdf_md(pctx
, &kdf_md
))
840 if (kdf_type
== EVP_PKEY_DH_KDF_NONE
) {
841 kdf_type
= EVP_PKEY_DH_KDF_X9_42
;
842 if (EVP_PKEY_CTX_set_dh_kdf_type(pctx
, kdf_type
) <= 0)
844 } else if (kdf_type
!= EVP_PKEY_DH_KDF_X9_42
)
847 if (kdf_md
== NULL
) {
848 /* Only SHA1 supported */
850 if (EVP_PKEY_CTX_set_dh_kdf_md(pctx
, kdf_md
) <= 0)
852 } else if (EVP_MD_type(kdf_md
) != NID_sha1
)
853 /* Unsupported digest */
856 if (!CMS_RecipientInfo_kari_get0_alg(ri
, &talg
, &ukm
))
860 ctx
= CMS_RecipientInfo_kari_get0_ctx(ri
);
861 wrap_nid
= EVP_CIPHER_CTX_type(ctx
);
862 if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx
, OBJ_nid2obj(wrap_nid
)) <= 0)
864 keylen
= EVP_CIPHER_CTX_key_length(ctx
);
866 /* Package wrap algorithm in an AlgorithmIdentifier */
868 wrap_alg
= X509_ALGOR_new();
869 if (wrap_alg
== NULL
)
871 wrap_alg
->algorithm
= OBJ_nid2obj(wrap_nid
);
872 wrap_alg
->parameter
= ASN1_TYPE_new();
873 if (wrap_alg
->parameter
== NULL
)
875 if (EVP_CIPHER_param_to_asn1(ctx
, wrap_alg
->parameter
) <= 0)
877 if (ASN1_TYPE_get(wrap_alg
->parameter
) == NID_undef
) {
878 ASN1_TYPE_free(wrap_alg
->parameter
);
879 wrap_alg
->parameter
= NULL
;
882 if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx
, keylen
) <= 0)
886 dukmlen
= ASN1_STRING_length(ukm
);
887 dukm
= OPENSSL_memdup(ASN1_STRING_data(ukm
), dukmlen
);
892 if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx
, dukm
, dukmlen
) <= 0)
897 * Now need to wrap encoding of wrap AlgorithmIdentifier into parameter
898 * of another AlgorithmIdentifier.
901 penclen
= i2d_X509_ALGOR(wrap_alg
, &penc
);
902 if (!penc
|| !penclen
)
904 wrap_str
= ASN1_STRING_new();
905 if (wrap_str
== NULL
)
907 ASN1_STRING_set0(wrap_str
, penc
, penclen
);
909 X509_ALGOR_set0(talg
, OBJ_nid2obj(NID_id_smime_alg_ESDH
),
910 V_ASN1_SEQUENCE
, wrap_str
);
916 X509_ALGOR_free(wrap_alg
);