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 "crypto/asn1.h"
17 #include "crypto/evp.h"
18 #include <openssl/cms.h>
19 #include <openssl/core_names.h>
20 #include "internal/param_build.h"
23 * i2d/d2i like DH parameter functions which use the appropriate routine for
24 * PKCS#3 DH or X9.42 DH.
27 static DH
*d2i_dhp(const EVP_PKEY
*pkey
, const unsigned char **pp
,
30 if (pkey
->ameth
== &dhx_asn1_meth
)
31 return d2i_DHxparams(NULL
, pp
, length
);
32 return d2i_DHparams(NULL
, pp
, length
);
35 static int i2d_dhp(const EVP_PKEY
*pkey
, const DH
*a
, unsigned char **pp
)
37 if (pkey
->ameth
== &dhx_asn1_meth
)
38 return i2d_DHxparams(a
, pp
);
39 return i2d_DHparams(a
, pp
);
42 static void int_dh_free(EVP_PKEY
*pkey
)
44 DH_free(pkey
->pkey
.dh
);
47 static int dh_pub_decode(EVP_PKEY
*pkey
, X509_PUBKEY
*pubkey
)
49 const unsigned char *p
, *pm
;
53 const ASN1_STRING
*pstr
;
55 ASN1_INTEGER
*public_key
= NULL
;
59 if (!X509_PUBKEY_get0_param(NULL
, &p
, &pklen
, &palg
, pubkey
))
61 X509_ALGOR_get0(NULL
, &ptype
, &pval
, palg
);
63 if (ptype
!= V_ASN1_SEQUENCE
) {
64 DHerr(DH_F_DH_PUB_DECODE
, DH_R_PARAMETER_ENCODING_ERROR
);
72 if ((dh
= d2i_dhp(pkey
, &pm
, pmlen
)) == NULL
) {
73 DHerr(DH_F_DH_PUB_DECODE
, DH_R_DECODE_ERROR
);
77 if ((public_key
= d2i_ASN1_INTEGER(NULL
, &p
, pklen
)) == NULL
) {
78 DHerr(DH_F_DH_PUB_DECODE
, DH_R_DECODE_ERROR
);
82 /* We have parameters now set public key */
83 if ((dh
->pub_key
= ASN1_INTEGER_to_BN(public_key
, NULL
)) == NULL
) {
84 DHerr(DH_F_DH_PUB_DECODE
, DH_R_BN_DECODE_ERROR
);
88 ASN1_INTEGER_free(public_key
);
89 EVP_PKEY_assign(pkey
, pkey
->ameth
->pkey_id
, dh
);
93 ASN1_INTEGER_free(public_key
);
99 static int dh_pub_encode(X509_PUBKEY
*pk
, const EVP_PKEY
*pkey
)
103 unsigned char *penc
= NULL
;
106 ASN1_INTEGER
*pub_key
= NULL
;
110 str
= ASN1_STRING_new();
112 DHerr(DH_F_DH_PUB_ENCODE
, ERR_R_MALLOC_FAILURE
);
115 str
->length
= i2d_dhp(pkey
, dh
, &str
->data
);
116 if (str
->length
<= 0) {
117 DHerr(DH_F_DH_PUB_ENCODE
, ERR_R_MALLOC_FAILURE
);
120 ptype
= V_ASN1_SEQUENCE
;
122 pub_key
= BN_to_ASN1_INTEGER(dh
->pub_key
, NULL
);
126 penclen
= i2d_ASN1_INTEGER(pub_key
, &penc
);
128 ASN1_INTEGER_free(pub_key
);
131 DHerr(DH_F_DH_PUB_ENCODE
, ERR_R_MALLOC_FAILURE
);
135 if (X509_PUBKEY_set0_param(pk
, OBJ_nid2obj(pkey
->ameth
->pkey_id
),
136 ptype
, str
, penc
, penclen
))
141 ASN1_STRING_free(str
);
147 * PKCS#8 DH is defined in PKCS#11 of all places. It is similar to DH in that
148 * the AlgorithmIdentifier contains the parameters, the private key is
149 * explicitly included and the pubkey must be recalculated.
152 static int dh_priv_decode(EVP_PKEY
*pkey
, const PKCS8_PRIV_KEY_INFO
*p8
)
154 const unsigned char *p
, *pm
;
158 const ASN1_STRING
*pstr
;
159 const X509_ALGOR
*palg
;
160 ASN1_INTEGER
*privkey
= NULL
;
163 if (!PKCS8_pkey_get0(NULL
, &p
, &pklen
, &palg
, p8
))
166 X509_ALGOR_get0(NULL
, &ptype
, &pval
, palg
);
168 if (ptype
!= V_ASN1_SEQUENCE
)
170 if ((privkey
= d2i_ASN1_INTEGER(NULL
, &p
, pklen
)) == NULL
)
175 pmlen
= pstr
->length
;
176 if ((dh
= d2i_dhp(pkey
, &pm
, pmlen
)) == NULL
)
179 /* We have parameters now set private key */
180 if ((dh
->priv_key
= BN_secure_new()) == NULL
181 || !ASN1_INTEGER_to_BN(privkey
, dh
->priv_key
)) {
182 DHerr(DH_F_DH_PRIV_DECODE
, DH_R_BN_ERROR
);
185 /* Calculate public key, increments dirty_cnt */
186 if (!DH_generate_key(dh
))
189 EVP_PKEY_assign(pkey
, pkey
->ameth
->pkey_id
, dh
);
191 ASN1_STRING_clear_free(privkey
);
196 DHerr(DH_F_DH_PRIV_DECODE
, EVP_R_DECODE_ERROR
);
199 ASN1_STRING_clear_free(privkey
);
203 static int dh_priv_encode(PKCS8_PRIV_KEY_INFO
*p8
, const EVP_PKEY
*pkey
)
205 ASN1_STRING
*params
= NULL
;
206 ASN1_INTEGER
*prkey
= NULL
;
207 unsigned char *dp
= NULL
;
210 params
= ASN1_STRING_new();
212 if (params
== NULL
) {
213 DHerr(DH_F_DH_PRIV_ENCODE
, ERR_R_MALLOC_FAILURE
);
217 params
->length
= i2d_dhp(pkey
, pkey
->pkey
.dh
, ¶ms
->data
);
218 if (params
->length
<= 0) {
219 DHerr(DH_F_DH_PRIV_ENCODE
, ERR_R_MALLOC_FAILURE
);
222 params
->type
= V_ASN1_SEQUENCE
;
224 /* Get private key into integer */
225 prkey
= BN_to_ASN1_INTEGER(pkey
->pkey
.dh
->priv_key
, NULL
);
228 DHerr(DH_F_DH_PRIV_ENCODE
, DH_R_BN_ERROR
);
232 dplen
= i2d_ASN1_INTEGER(prkey
, &dp
);
234 ASN1_STRING_clear_free(prkey
);
237 if (!PKCS8_pkey_set0(p8
, OBJ_nid2obj(pkey
->ameth
->pkey_id
), 0,
238 V_ASN1_SEQUENCE
, params
, dp
, dplen
))
245 ASN1_STRING_free(params
);
246 ASN1_STRING_clear_free(prkey
);
250 static int dh_param_decode(EVP_PKEY
*pkey
,
251 const unsigned char **pder
, int derlen
)
255 if ((dh
= d2i_dhp(pkey
, pder
, derlen
)) == NULL
) {
256 DHerr(DH_F_DH_PARAM_DECODE
, ERR_R_DH_LIB
);
260 EVP_PKEY_assign(pkey
, pkey
->ameth
->pkey_id
, dh
);
264 static int dh_param_encode(const EVP_PKEY
*pkey
, unsigned char **pder
)
266 return i2d_dhp(pkey
, pkey
->pkey
.dh
, pder
);
269 static int do_dh_print(BIO
*bp
, const DH
*x
, int indent
, int ptype
)
271 int reason
= ERR_R_BUF_LIB
;
272 const char *ktype
= NULL
;
273 BIGNUM
*priv_key
, *pub_key
;
276 priv_key
= x
->priv_key
;
281 pub_key
= x
->pub_key
;
285 if (x
->p
== NULL
|| (ptype
== 2 && priv_key
== NULL
)
286 || (ptype
> 0 && pub_key
== NULL
)) {
287 reason
= ERR_R_PASSED_NULL_PARAMETER
;
292 ktype
= "DH Private-Key";
294 ktype
= "DH Public-Key";
296 ktype
= "DH Parameters";
298 BIO_indent(bp
, indent
, 128);
299 if (BIO_printf(bp
, "%s: (%d bit)\n", ktype
, BN_num_bits(x
->p
)) <= 0)
303 if (!ASN1_bn_print(bp
, "private-key:", priv_key
, NULL
, indent
))
305 if (!ASN1_bn_print(bp
, "public-key:", pub_key
, NULL
, indent
))
308 if (!ASN1_bn_print(bp
, "prime:", x
->p
, NULL
, indent
))
310 if (!ASN1_bn_print(bp
, "generator:", x
->g
, NULL
, indent
))
312 if (x
->q
&& !ASN1_bn_print(bp
, "subgroup order:", x
->q
, NULL
, indent
))
314 if (x
->j
&& !ASN1_bn_print(bp
, "subgroup factor:", x
->j
, NULL
, indent
))
318 BIO_indent(bp
, indent
, 128);
319 BIO_puts(bp
, "seed:");
320 for (i
= 0; i
< x
->seedlen
; i
++) {
322 if (BIO_puts(bp
, "\n") <= 0
323 || !BIO_indent(bp
, indent
+ 4, 128))
326 if (BIO_printf(bp
, "%02x%s", x
->seed
[i
],
327 ((i
+ 1) == x
->seedlen
) ? "" : ":") <= 0)
330 if (BIO_write(bp
, "\n", 1) <= 0)
333 if (x
->counter
&& !ASN1_bn_print(bp
, "counter:", x
->counter
, NULL
, indent
))
335 if (x
->length
!= 0) {
336 BIO_indent(bp
, indent
, 128);
337 if (BIO_printf(bp
, "recommended-private-length: %d bits\n",
338 (int)x
->length
) <= 0)
345 DHerr(DH_F_DO_DH_PRINT
, reason
);
349 static int int_dh_size(const EVP_PKEY
*pkey
)
351 return DH_size(pkey
->pkey
.dh
);
354 static int dh_bits(const EVP_PKEY
*pkey
)
356 return BN_num_bits(pkey
->pkey
.dh
->p
);
359 static int dh_security_bits(const EVP_PKEY
*pkey
)
361 return DH_security_bits(pkey
->pkey
.dh
);
364 static int dh_cmp_parameters(const EVP_PKEY
*a
, const EVP_PKEY
*b
)
366 if (BN_cmp(a
->pkey
.dh
->p
, b
->pkey
.dh
->p
) ||
367 BN_cmp(a
->pkey
.dh
->g
, b
->pkey
.dh
->g
))
369 else if (a
->ameth
== &dhx_asn1_meth
) {
370 if (BN_cmp(a
->pkey
.dh
->q
, b
->pkey
.dh
->q
))
376 static int int_dh_bn_cpy(BIGNUM
**dst
, const BIGNUM
*src
)
381 * If source is read only just copy the pointer, so
382 * we don't have to reallocate it.
386 else if (BN_get_flags(src
, BN_FLG_STATIC_DATA
)
387 && !BN_get_flags(src
, BN_FLG_MALLOCED
))
389 else if ((a
= BN_dup(src
)) == NULL
)
396 static int int_dh_param_copy(DH
*to
, const DH
*from
, int is_x942
)
399 is_x942
= ! !from
->q
;
400 if (!int_dh_bn_cpy(&to
->p
, from
->p
))
402 if (!int_dh_bn_cpy(&to
->g
, from
->g
))
405 if (!int_dh_bn_cpy(&to
->q
, from
->q
))
407 if (!int_dh_bn_cpy(&to
->j
, from
->j
))
409 OPENSSL_free(to
->seed
);
413 to
->seed
= OPENSSL_memdup(from
->seed
, from
->seedlen
);
416 to
->seedlen
= from
->seedlen
;
419 to
->length
= from
->length
;
424 DH
*DHparams_dup(const DH
*dh
)
430 if (!int_dh_param_copy(ret
, dh
, -1)) {
437 static int dh_copy_parameters(EVP_PKEY
*to
, const EVP_PKEY
*from
)
439 if (to
->pkey
.dh
== NULL
) {
440 to
->pkey
.dh
= DH_new();
441 if (to
->pkey
.dh
== NULL
)
444 return int_dh_param_copy(to
->pkey
.dh
, from
->pkey
.dh
,
445 from
->ameth
== &dhx_asn1_meth
);
448 static int dh_missing_parameters(const EVP_PKEY
*a
)
450 if (a
->pkey
.dh
== NULL
|| a
->pkey
.dh
->p
== NULL
|| a
->pkey
.dh
->g
== NULL
)
455 static int dh_pub_cmp(const EVP_PKEY
*a
, const EVP_PKEY
*b
)
457 if (dh_cmp_parameters(a
, b
) == 0)
459 if (BN_cmp(b
->pkey
.dh
->pub_key
, a
->pkey
.dh
->pub_key
) != 0)
465 static int dh_param_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
468 return do_dh_print(bp
, pkey
->pkey
.dh
, indent
, 0);
471 static int dh_public_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
474 return do_dh_print(bp
, pkey
->pkey
.dh
, indent
, 1);
477 static int dh_private_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
480 return do_dh_print(bp
, pkey
->pkey
.dh
, indent
, 2);
483 int DHparams_print(BIO
*bp
, const DH
*x
)
485 return do_dh_print(bp
, x
, 4, 0);
488 #ifndef OPENSSL_NO_CMS
489 static int dh_cms_decrypt(CMS_RecipientInfo
*ri
);
490 static int dh_cms_encrypt(CMS_RecipientInfo
*ri
);
493 static int dh_pkey_ctrl(EVP_PKEY
*pkey
, int op
, long arg1
, void *arg2
)
496 case ASN1_PKEY_CTRL_SET1_TLS_ENCPT
:
497 return dh_buf2key(EVP_PKEY_get0_DH(pkey
), arg2
, arg1
);
498 case ASN1_PKEY_CTRL_GET1_TLS_ENCPT
:
499 return dh_key2buf(EVP_PKEY_get0_DH(pkey
), arg2
);
505 static int dhx_pkey_ctrl(EVP_PKEY
*pkey
, int op
, long arg1
, void *arg2
)
508 #ifndef OPENSSL_NO_CMS
510 case ASN1_PKEY_CTRL_CMS_ENVELOPE
:
512 return dh_cms_decrypt(arg2
);
514 return dh_cms_encrypt(arg2
);
517 case ASN1_PKEY_CTRL_CMS_RI_TYPE
:
518 *(int *)arg2
= CMS_RECIPINFO_AGREE
;
527 static int dh_pkey_public_check(const EVP_PKEY
*pkey
)
529 DH
*dh
= pkey
->pkey
.dh
;
531 if (dh
->pub_key
== NULL
) {
532 DHerr(DH_F_DH_PKEY_PUBLIC_CHECK
, DH_R_MISSING_PUBKEY
);
536 return DH_check_pub_key_ex(dh
, dh
->pub_key
);
539 static int dh_pkey_param_check(const EVP_PKEY
*pkey
)
541 DH
*dh
= pkey
->pkey
.dh
;
543 return DH_check_ex(dh
);
546 static size_t dh_pkey_dirty_cnt(const EVP_PKEY
*pkey
)
548 return pkey
->pkey
.dh
->dirty_cnt
;
551 static void *dh_pkey_export_to(const EVP_PKEY
*pk
, EVP_KEYMGMT
*keymgmt
)
553 DH
*dh
= pk
->pkey
.dh
;
555 const BIGNUM
*p
= DH_get0_p(dh
), *g
= DH_get0_g(dh
), *q
= DH_get0_q(dh
);
556 const BIGNUM
*pub_key
= DH_get0_pub_key(dh
);
557 const BIGNUM
*priv_key
= DH_get0_priv_key(dh
);
559 void *provkey
= NULL
;
561 if (p
== NULL
|| g
== NULL
)
564 ossl_param_bld_init(&tmpl
);
565 if (!ossl_param_bld_push_BN(&tmpl
, OSSL_PKEY_PARAM_FFC_P
, p
)
566 || !ossl_param_bld_push_BN(&tmpl
, OSSL_PKEY_PARAM_FFC_G
, g
))
570 if (!ossl_param_bld_push_BN(&tmpl
, OSSL_PKEY_PARAM_FFC_Q
, q
))
575 * This may be used to pass domain parameters only without any key data -
576 * so "pub_key" is optional. We can never have a "priv_key" without a
577 * corresponding "pub_key" though.
579 if (pub_key
!= NULL
) {
580 if (!ossl_param_bld_push_BN(&tmpl
, OSSL_PKEY_PARAM_DH_PUB_KEY
, pub_key
))
583 if (priv_key
!= NULL
) {
584 if (!ossl_param_bld_push_BN(&tmpl
, OSSL_PKEY_PARAM_DH_PRIV_KEY
,
590 params
= ossl_param_bld_to_param(&tmpl
);
592 /* We export, the provider imports */
593 provkey
= evp_keymgmt_importkey(keymgmt
, params
);
595 ossl_param_bld_free(params
);
599 const EVP_PKEY_ASN1_METHOD dh_asn1_meth
= {
605 "OpenSSL PKCS#3 DH method",
622 dh_missing_parameters
,
634 dh_pkey_public_check
,
643 const EVP_PKEY_ASN1_METHOD dhx_asn1_meth
= {
649 "OpenSSL X9.42 DH method",
666 dh_missing_parameters
,
678 dh_pkey_public_check
,
682 #ifndef OPENSSL_NO_CMS
684 static int dh_cms_set_peerkey(EVP_PKEY_CTX
*pctx
,
685 X509_ALGOR
*alg
, ASN1_BIT_STRING
*pubkey
)
687 const ASN1_OBJECT
*aoid
;
690 ASN1_INTEGER
*public_key
= NULL
;
692 EVP_PKEY
*pkpeer
= NULL
, *pk
= NULL
;
694 const unsigned char *p
;
697 X509_ALGOR_get0(&aoid
, &atype
, &aval
, alg
);
698 if (OBJ_obj2nid(aoid
) != NID_dhpublicnumber
)
700 /* Only absent parameters allowed in RFC XXXX */
701 if (atype
!= V_ASN1_UNDEF
&& atype
== V_ASN1_NULL
)
704 pk
= EVP_PKEY_CTX_get0_pkey(pctx
);
707 if (pk
->type
!= EVP_PKEY_DHX
)
709 /* Get parameters from parent key */
710 dhpeer
= DHparams_dup(pk
->pkey
.dh
);
711 /* We have parameters now set public key */
712 plen
= ASN1_STRING_length(pubkey
);
713 p
= ASN1_STRING_get0_data(pubkey
);
714 if (p
== NULL
|| plen
== 0)
717 if ((public_key
= d2i_ASN1_INTEGER(NULL
, &p
, plen
)) == NULL
) {
718 DHerr(DH_F_DH_CMS_SET_PEERKEY
, DH_R_DECODE_ERROR
);
722 /* We have parameters now set public key */
723 if ((dhpeer
->pub_key
= ASN1_INTEGER_to_BN(public_key
, NULL
)) == NULL
) {
724 DHerr(DH_F_DH_CMS_SET_PEERKEY
, DH_R_BN_DECODE_ERROR
);
728 pkpeer
= EVP_PKEY_new();
731 EVP_PKEY_assign(pkpeer
, pk
->ameth
->pkey_id
, dhpeer
);
733 if (EVP_PKEY_derive_set_peer(pctx
, pkpeer
) > 0)
736 ASN1_INTEGER_free(public_key
);
737 EVP_PKEY_free(pkpeer
);
742 static int dh_cms_set_shared_info(EVP_PKEY_CTX
*pctx
, CMS_RecipientInfo
*ri
)
746 X509_ALGOR
*alg
, *kekalg
= NULL
;
747 ASN1_OCTET_STRING
*ukm
;
748 const unsigned char *p
;
749 unsigned char *dukm
= NULL
;
752 const EVP_CIPHER
*kekcipher
;
753 EVP_CIPHER_CTX
*kekctx
;
755 if (!CMS_RecipientInfo_kari_get0_alg(ri
, &alg
, &ukm
))
759 * For DH we only have one OID permissible. If ever any more get defined
760 * we will need something cleverer.
762 if (OBJ_obj2nid(alg
->algorithm
) != NID_id_smime_alg_ESDH
) {
763 DHerr(DH_F_DH_CMS_SET_SHARED_INFO
, DH_R_KDF_PARAMETER_ERROR
);
767 if (EVP_PKEY_CTX_set_dh_kdf_type(pctx
, EVP_PKEY_DH_KDF_X9_42
) <= 0)
770 if (EVP_PKEY_CTX_set_dh_kdf_md(pctx
, EVP_sha1()) <= 0)
773 if (alg
->parameter
->type
!= V_ASN1_SEQUENCE
)
776 p
= alg
->parameter
->value
.sequence
->data
;
777 plen
= alg
->parameter
->value
.sequence
->length
;
778 kekalg
= d2i_X509_ALGOR(NULL
, &p
, plen
);
781 kekctx
= CMS_RecipientInfo_kari_get0_ctx(ri
);
784 kekcipher
= EVP_get_cipherbyobj(kekalg
->algorithm
);
785 if (!kekcipher
|| EVP_CIPHER_mode(kekcipher
) != EVP_CIPH_WRAP_MODE
)
787 if (!EVP_EncryptInit_ex(kekctx
, kekcipher
, NULL
, NULL
, NULL
))
789 if (EVP_CIPHER_asn1_to_param(kekctx
, kekalg
->parameter
) <= 0)
792 keylen
= EVP_CIPHER_CTX_key_length(kekctx
);
793 if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx
, keylen
) <= 0)
795 /* Use OBJ_nid2obj to ensure we use built in OID that isn't freed */
796 if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx
,
797 OBJ_nid2obj(EVP_CIPHER_type(kekcipher
)))
802 dukmlen
= ASN1_STRING_length(ukm
);
803 dukm
= OPENSSL_memdup(ASN1_STRING_get0_data(ukm
), dukmlen
);
808 if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx
, dukm
, dukmlen
) <= 0)
814 X509_ALGOR_free(kekalg
);
819 static int dh_cms_decrypt(CMS_RecipientInfo
*ri
)
822 pctx
= CMS_RecipientInfo_get0_pkey_ctx(ri
);
826 /* See if we need to set peer key */
827 if (!EVP_PKEY_CTX_get0_peerkey(pctx
)) {
829 ASN1_BIT_STRING
*pubkey
;
830 if (!CMS_RecipientInfo_kari_get0_orig_id(ri
, &alg
, &pubkey
,
835 if (!dh_cms_set_peerkey(pctx
, alg
, pubkey
)) {
836 DHerr(DH_F_DH_CMS_DECRYPT
, DH_R_PEER_KEY_ERROR
);
840 /* Set DH derivation parameters and initialise unwrap context */
841 if (!dh_cms_set_shared_info(pctx
, ri
)) {
842 DHerr(DH_F_DH_CMS_DECRYPT
, DH_R_SHARED_INFO_ERROR
);
848 static int dh_cms_encrypt(CMS_RecipientInfo
*ri
)
854 X509_ALGOR
*talg
, *wrap_alg
= NULL
;
855 const ASN1_OBJECT
*aoid
;
856 ASN1_BIT_STRING
*pubkey
;
857 ASN1_STRING
*wrap_str
;
858 ASN1_OCTET_STRING
*ukm
;
859 unsigned char *penc
= NULL
, *dukm
= NULL
;
863 int kdf_type
, wrap_nid
;
864 const EVP_MD
*kdf_md
;
866 pctx
= CMS_RecipientInfo_get0_pkey_ctx(ri
);
869 /* Get ephemeral key */
870 pkey
= EVP_PKEY_CTX_get0_pkey(pctx
);
871 if (!CMS_RecipientInfo_kari_get0_orig_id(ri
, &talg
, &pubkey
,
874 X509_ALGOR_get0(&aoid
, NULL
, NULL
, talg
);
875 /* Is everything uninitialised? */
876 if (aoid
== OBJ_nid2obj(NID_undef
)) {
877 ASN1_INTEGER
*pubk
= BN_to_ASN1_INTEGER(pkey
->pkey
.dh
->pub_key
, NULL
);
883 penclen
= i2d_ASN1_INTEGER(pubk
, &penc
);
884 ASN1_INTEGER_free(pubk
);
887 ASN1_STRING_set0(pubkey
, penc
, penclen
);
888 pubkey
->flags
&= ~(ASN1_STRING_FLAG_BITS_LEFT
| 0x07);
889 pubkey
->flags
|= ASN1_STRING_FLAG_BITS_LEFT
;
892 X509_ALGOR_set0(talg
, OBJ_nid2obj(NID_dhpublicnumber
),
896 /* See if custom parameters set */
897 kdf_type
= EVP_PKEY_CTX_get_dh_kdf_type(pctx
);
900 if (!EVP_PKEY_CTX_get_dh_kdf_md(pctx
, &kdf_md
))
903 if (kdf_type
== EVP_PKEY_DH_KDF_NONE
) {
904 kdf_type
= EVP_PKEY_DH_KDF_X9_42
;
905 if (EVP_PKEY_CTX_set_dh_kdf_type(pctx
, kdf_type
) <= 0)
907 } else if (kdf_type
!= EVP_PKEY_DH_KDF_X9_42
)
910 if (kdf_md
== NULL
) {
911 /* Only SHA1 supported */
913 if (EVP_PKEY_CTX_set_dh_kdf_md(pctx
, kdf_md
) <= 0)
915 } else if (EVP_MD_type(kdf_md
) != NID_sha1
)
916 /* Unsupported digest */
919 if (!CMS_RecipientInfo_kari_get0_alg(ri
, &talg
, &ukm
))
923 ctx
= CMS_RecipientInfo_kari_get0_ctx(ri
);
924 wrap_nid
= EVP_CIPHER_CTX_type(ctx
);
925 if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx
, OBJ_nid2obj(wrap_nid
)) <= 0)
927 keylen
= EVP_CIPHER_CTX_key_length(ctx
);
929 /* Package wrap algorithm in an AlgorithmIdentifier */
931 wrap_alg
= X509_ALGOR_new();
932 if (wrap_alg
== NULL
)
934 wrap_alg
->algorithm
= OBJ_nid2obj(wrap_nid
);
935 wrap_alg
->parameter
= ASN1_TYPE_new();
936 if (wrap_alg
->parameter
== NULL
)
938 if (EVP_CIPHER_param_to_asn1(ctx
, wrap_alg
->parameter
) <= 0)
940 if (ASN1_TYPE_get(wrap_alg
->parameter
) == NID_undef
) {
941 ASN1_TYPE_free(wrap_alg
->parameter
);
942 wrap_alg
->parameter
= NULL
;
945 if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx
, keylen
) <= 0)
949 dukmlen
= ASN1_STRING_length(ukm
);
950 dukm
= OPENSSL_memdup(ASN1_STRING_get0_data(ukm
), dukmlen
);
955 if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx
, dukm
, dukmlen
) <= 0)
960 * Now need to wrap encoding of wrap AlgorithmIdentifier into parameter
961 * of another AlgorithmIdentifier.
964 penclen
= i2d_X509_ALGOR(wrap_alg
, &penc
);
965 if (penc
== NULL
|| penclen
== 0)
967 wrap_str
= ASN1_STRING_new();
968 if (wrap_str
== NULL
)
970 ASN1_STRING_set0(wrap_str
, penc
, penclen
);
972 X509_ALGOR_set0(talg
, OBJ_nid2obj(NID_id_smime_alg_ESDH
),
973 V_ASN1_SEQUENCE
, wrap_str
);
979 X509_ALGOR_free(wrap_alg
);