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-rw-r--r--src/lib/libcrypto/ec/ec_ameth.c1065
1 files changed, 0 insertions, 1065 deletions
diff --git a/src/lib/libcrypto/ec/ec_ameth.c b/src/lib/libcrypto/ec/ec_ameth.c
deleted file mode 100644
index 903b18a8db..0000000000
--- a/src/lib/libcrypto/ec/ec_ameth.c
+++ /dev/null
@@ -1,1065 +0,0 @@
1/* $OpenBSD: ec_ameth.c,v 1.73 2024/11/25 06:51:39 tb Exp $ */
2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project 2006.
4 */
5/* ====================================================================
6 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
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
18 * distribution.
19 *
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/)"
24 *
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.
29 *
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.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
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 * ====================================================================
52 *
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).
56 *
57 */
58
59#include <stddef.h>
60#include <stdlib.h>
61
62#include <openssl/opensslconf.h>
63
64#include <openssl/asn1.h>
65#include <openssl/bio.h>
66#include <openssl/bn.h>
67#include <openssl/cms.h>
68#include <openssl/ec.h>
69#include <openssl/err.h>
70#include <openssl/evp.h>
71#include <openssl/pkcs7.h>
72#include <openssl/objects.h>
73#include <openssl/x509.h>
74
75#include "asn1_local.h"
76#include "bn_local.h"
77#include "evp_local.h"
78#include "x509_local.h"
79
80#ifndef OPENSSL_NO_CMS
81static int ecdh_cms_decrypt(CMS_RecipientInfo *ri);
82static int ecdh_cms_encrypt(CMS_RecipientInfo *ri);
83#endif
84
85static void
86eckey_param_free(int ptype, void *pval)
87{
88 if (pval == NULL)
89 return;
90 if (ptype == V_ASN1_OBJECT)
91 ASN1_OBJECT_free(pval); /* XXX - really necessary? */
92 else
93 ASN1_STRING_free(pval);
94}
95
96static int
97eckey_get_curve_name(const EC_KEY *eckey, int *nid)
98{
99 const EC_GROUP *group;
100
101 *nid = NID_undef;
102
103 if ((group = EC_KEY_get0_group(eckey)) == NULL) {
104 ECerror(EC_R_MISSING_PARAMETERS);
105 return 0;
106 }
107 if ((EC_GROUP_get_asn1_flag(group) & OPENSSL_EC_NAMED_CURVE) != 0)
108 *nid = EC_GROUP_get_curve_name(group);
109
110 return 1;
111}
112
113static int
114eckey_to_explicit_params(EC_KEY *eckey, void **out_val)
115{
116 ASN1_STRING *astr = NULL;
117 unsigned char *params = NULL;
118 int params_len = 0;
119 int ret = 0;
120
121 *out_val = NULL;
122
123 if ((params_len = i2d_ECParameters(eckey, &params)) <= 0) {
124 ECerror(ERR_R_EC_LIB);
125 params_len = 0;
126 goto err;
127 }
128
129 if ((astr = ASN1_STRING_new()) == NULL)
130 goto err;
131 ASN1_STRING_set0(astr, params, params_len);
132 params = NULL;
133 params_len = 0;
134
135 *out_val = astr;
136 astr = NULL;
137
138 ret = 1;
139
140 err:
141 freezero(params, params_len);
142 ASN1_STRING_free(astr);
143
144 return ret;
145}
146
147static int
148eckey_from_explicit_params(const ASN1_STRING *astr, EC_KEY **out_eckey)
149{
150 const unsigned char *params = astr->data;
151 int params_len = astr->length;
152
153 EC_KEY_free(*out_eckey);
154 if ((*out_eckey = d2i_ECParameters(NULL, &params, params_len)) == NULL) {
155 ECerror(EC_R_DECODE_ERROR);
156 return 0;
157 }
158
159 return 1;
160}
161
162static int
163eckey_to_object(const EC_KEY *eckey, void **out_val)
164{
165 int nid = NID_undef;
166
167 *out_val = NULL;
168
169 if (!eckey_get_curve_name(eckey, &nid))
170 return 0;
171 if ((*out_val = OBJ_nid2obj(nid)) == NULL)
172 return 0;
173
174 return 1;
175}
176
177static int
178eckey_from_object(const ASN1_OBJECT *aobj, EC_KEY **out_eckey)
179{
180 int nid;
181
182 EC_KEY_free(*out_eckey);
183 *out_eckey = NULL;
184
185 if ((nid = OBJ_obj2nid(aobj)) == NID_undef)
186 return 0;
187 if ((*out_eckey = EC_KEY_new_by_curve_name(nid)) == NULL)
188 return 0;
189
190 return 1;
191}
192
193static int
194eckey_to_params(EC_KEY *eckey, int *out_type, void **out_val)
195{
196 int nid;
197
198 *out_type = NID_undef;
199 *out_val = NULL;
200
201 if (!eckey_get_curve_name(eckey, &nid))
202 return 0;
203
204 if (nid == NID_undef) {
205 *out_type = V_ASN1_SEQUENCE;
206 return eckey_to_explicit_params(eckey, out_val);
207 } else {
208 *out_type = V_ASN1_OBJECT;
209 return eckey_to_object(eckey, out_val);
210 }
211}
212
213static int
214eckey_from_params(int ptype, const void *pval, EC_KEY **out_eckey)
215{
216 EC_KEY_free(*out_eckey);
217 *out_eckey = NULL;
218
219 if (ptype == V_ASN1_SEQUENCE)
220 return eckey_from_explicit_params(pval, out_eckey);
221 if (ptype == V_ASN1_OBJECT)
222 return eckey_from_object(pval, out_eckey);
223
224 ECerror(EC_R_DECODE_ERROR);
225 return 0;
226}
227
228static int
229eckey_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
230{
231 EC_KEY *eckey = pkey->pkey.ec;
232 int ptype = V_ASN1_UNDEF;
233 void *pval = NULL;
234 ASN1_OBJECT *aobj;
235 unsigned char *key = NULL;
236 int key_len = 0;
237 int ret = 0;
238
239 if (!eckey_to_params(eckey, &ptype, &pval)) {
240 ECerror(ERR_R_EC_LIB);
241 goto err;
242 }
243 if ((key_len = i2o_ECPublicKey(eckey, &key)) <= 0) {
244 key_len = 0;
245 goto err;
246 }
247 if ((aobj = OBJ_nid2obj(EVP_PKEY_EC)) == NULL)
248 goto err;
249 if (!X509_PUBKEY_set0_param(pk, aobj, ptype, pval, key, key_len))
250 goto err;
251 pval = NULL;
252 key = NULL;
253 key_len = 0;
254
255 ret = 1;
256
257 err:
258 eckey_param_free(ptype, pval);
259 freezero(key, key_len);
260
261 return ret;
262}
263
264static int
265eckey_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
266{
267 const unsigned char *p = NULL;
268 const void *pval;
269 int ptype, pklen;
270 EC_KEY *eckey = NULL;
271 X509_ALGOR *palg;
272 int ret = 0;
273
274 if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
275 goto err;
276
277 X509_ALGOR_get0(NULL, &ptype, &pval, palg);
278 if (!eckey_from_params(ptype, pval, &eckey))
279 goto err;
280
281 if (!o2i_ECPublicKey(&eckey, &p, pklen)) {
282 ECerror(EC_R_DECODE_ERROR);
283 goto err;
284 }
285 if (!EVP_PKEY_assign_EC_KEY(pkey, eckey))
286 goto err;
287 eckey = NULL;
288
289 ret = 1;
290
291 err:
292 EC_KEY_free(eckey);
293
294 return ret;
295}
296
297static int
298eckey_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
299{
300 const EC_GROUP *group = EC_KEY_get0_group(b->pkey.ec);
301 const EC_POINT *pa = EC_KEY_get0_public_key(a->pkey.ec);
302 const EC_POINT *pb = EC_KEY_get0_public_key(b->pkey.ec);
303 int r;
304
305 r = EC_POINT_cmp(group, pa, pb, NULL);
306 if (r == 0)
307 return 1;
308 if (r == 1)
309 return 0;
310 return -2;
311}
312
313int
314eckey_compute_pubkey(EC_KEY *eckey)
315{
316 const BIGNUM *priv_key;
317 const EC_GROUP *group;
318 EC_POINT *pub_key = NULL;
319 int ret = 0;
320
321 if ((priv_key = EC_KEY_get0_private_key(eckey)) == NULL)
322 goto err;
323 if ((group = EC_KEY_get0_group(eckey)) == NULL)
324 goto err;
325 if ((pub_key = EC_POINT_new(group)) == NULL)
326 goto err;
327 if (!EC_POINT_mul(group, pub_key, priv_key, NULL, NULL, NULL))
328 goto err;
329 if (!EC_KEY_set_public_key(eckey, pub_key))
330 goto err;
331
332 ret = 1;
333
334 err:
335 EC_POINT_free(pub_key);
336
337 return ret;
338}
339
340static int
341eckey_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8)
342{
343 const unsigned char *priv = NULL;
344 int priv_len;
345 const void *pval;
346 int ptype;
347 EC_KEY *eckey = NULL;
348 const X509_ALGOR *palg;
349 int ret = 0;
350
351 if (!PKCS8_pkey_get0(NULL, &priv, &priv_len, &palg, p8))
352 goto err;
353
354 X509_ALGOR_get0(NULL, &ptype, &pval, palg);
355 if (!eckey_from_params(ptype, pval, &eckey))
356 goto err;
357
358 /* Decode private key into eckey. */
359 if (d2i_ECPrivateKey(&eckey, &priv, priv_len) == NULL) {
360 ECerror(EC_R_DECODE_ERROR);
361 goto err;
362 }
363 /* If public key was missing from SEC1 key, compute it. */
364 if (EC_KEY_get0_public_key(eckey) == NULL) {
365 if (!eckey_compute_pubkey(eckey))
366 goto err;
367 }
368
369 if (!EVP_PKEY_assign_EC_KEY(pkey, eckey))
370 goto err;
371 eckey = NULL;
372
373 ret = 1;
374
375 err:
376 EC_KEY_free(eckey);
377
378 return ret;
379}
380
381static int
382eckey_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
383{
384 EC_KEY *eckey = pkey->pkey.ec;
385 void *pval = NULL;
386 int ptype = V_ASN1_UNDEF;
387 ASN1_OBJECT *aobj;
388 unsigned char *key = NULL;
389 int key_len = 0;
390 unsigned int flags;
391 int ret = 0;
392
393 flags = EC_KEY_get_enc_flags(eckey);
394
395 if (!eckey_to_params(eckey, &ptype, &pval)) {
396 ECerror(EC_R_DECODE_ERROR);
397 goto err;
398 }
399
400 /* PKCS#11 12.11: don't include parameters in the SEC1 private key. */
401 EC_KEY_set_enc_flags(eckey, flags | EC_PKEY_NO_PARAMETERS);
402
403 if ((key_len = i2d_ECPrivateKey(eckey, &key)) <= 0) {
404 ECerror(ERR_R_EC_LIB);
405 key_len = 0;
406 goto err;
407 }
408 if ((aobj = OBJ_nid2obj(NID_X9_62_id_ecPublicKey)) == NULL)
409 goto err;
410 if (!PKCS8_pkey_set0(p8, aobj, 0, ptype, pval, key, key_len))
411 goto err;
412 pval = NULL;
413 key = NULL;
414 key_len = 0;
415
416 ret = 1;
417
418 err:
419 eckey_param_free(ptype, pval);
420 freezero(key, key_len);
421
422 EC_KEY_set_enc_flags(eckey, flags);
423
424 return ret;
425}
426
427static int
428ec_size(const EVP_PKEY *pkey)
429{
430 return ECDSA_size(pkey->pkey.ec);
431}
432
433static int
434ec_bits(const EVP_PKEY *pkey)
435{
436 const EC_GROUP *group;
437
438 if ((group = EC_KEY_get0_group(pkey->pkey.ec)) == NULL)
439 return 0;
440
441 return EC_GROUP_order_bits(group);
442}
443
444static int
445ec_security_bits(const EVP_PKEY *pkey)
446{
447 int ecbits = ec_bits(pkey);
448
449 if (ecbits >= 512)
450 return 256;
451 if (ecbits >= 384)
452 return 192;
453 if (ecbits >= 256)
454 return 128;
455 if (ecbits >= 224)
456 return 112;
457 if (ecbits >= 160)
458 return 80;
459
460 return ecbits / 2;
461}
462
463static int
464ec_missing_parameters(const EVP_PKEY *pkey)
465{
466 if (EC_KEY_get0_group(pkey->pkey.ec) == NULL)
467 return 1;
468 return 0;
469}
470
471static int
472ec_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
473{
474 return EC_KEY_set_group(to->pkey.ec, EC_KEY_get0_group(from->pkey.ec));
475}
476
477static int
478ec_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
479{
480 const EC_GROUP *group_a = EC_KEY_get0_group(a->pkey.ec);
481 const EC_GROUP *group_b = EC_KEY_get0_group(b->pkey.ec);
482
483 if (EC_GROUP_cmp(group_a, group_b, NULL))
484 return 0;
485 else
486 return 1;
487}
488
489static void
490ec_free(EVP_PKEY *pkey)
491{
492 EC_KEY_free(pkey->pkey.ec);
493}
494
495static int
496do_EC_KEY_print(BIO *bp, const EC_KEY *x, int off, int ktype)
497{
498 const char *ecstr;
499 int ret = 0, reason = ERR_R_BIO_LIB;
500 BIGNUM *pub_key = NULL;
501 BN_CTX *ctx = NULL;
502 const EC_GROUP *group;
503 const EC_POINT *public_key;
504 const BIGNUM *priv_key;
505
506 if (x == NULL || (group = EC_KEY_get0_group(x)) == NULL) {
507 reason = ERR_R_PASSED_NULL_PARAMETER;
508 goto err;
509 }
510 ctx = BN_CTX_new();
511 if (ctx == NULL) {
512 reason = ERR_R_MALLOC_FAILURE;
513 goto err;
514 }
515 if (ktype > 0) {
516 public_key = EC_KEY_get0_public_key(x);
517 if (public_key != NULL) {
518 if ((pub_key = EC_POINT_point2bn(group, public_key,
519 EC_KEY_get_conv_form(x), NULL, ctx)) == NULL) {
520 reason = ERR_R_EC_LIB;
521 goto err;
522 }
523 }
524 }
525 if (ktype == 2) {
526 priv_key = EC_KEY_get0_private_key(x);
527 } else
528 priv_key = NULL;
529
530 if (ktype == 2)
531 ecstr = "Private-Key";
532 else if (ktype == 1)
533 ecstr = "Public-Key";
534 else
535 ecstr = "ECDSA-Parameters";
536
537 if (!BIO_indent(bp, off, 128))
538 goto err;
539 if (BIO_printf(bp, "%s: (%d bit)\n", ecstr,
540 EC_GROUP_order_bits(group)) <= 0)
541 goto err;
542
543 if (!bn_printf(bp, priv_key, off, "priv:"))
544 goto err;
545 if (!bn_printf(bp, pub_key, off, "pub: "))
546 goto err;
547 if (!ECPKParameters_print(bp, group, off))
548 goto err;
549
550 ret = 1;
551
552 err:
553 if (!ret)
554 ECerror(reason);
555 BN_free(pub_key);
556 BN_CTX_free(ctx);
557
558 return (ret);
559}
560
561static int
562eckey_param_decode(EVP_PKEY *pkey, const unsigned char **param, int param_len)
563{
564 EC_KEY *eckey;
565 int ret = 0;
566
567 if ((eckey = d2i_ECParameters(NULL, param, param_len)) == NULL)
568 goto err;
569 if (!EVP_PKEY_assign_EC_KEY(pkey, eckey))
570 goto err;
571 eckey = NULL;
572
573 ret = 1;
574
575 err:
576 EC_KEY_free(eckey);
577
578 return ret;
579}
580
581static int
582eckey_param_encode(const EVP_PKEY *pkey, unsigned char **param)
583{
584 return i2d_ECParameters(pkey->pkey.ec, param);
585}
586
587static int
588eckey_param_print(BIO *bp, const EVP_PKEY *pkey, int indent, ASN1_PCTX *ctx)
589{
590 return do_EC_KEY_print(bp, pkey->pkey.ec, indent, 0);
591}
592
593static int
594eckey_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent, ASN1_PCTX *ctx)
595{
596 return do_EC_KEY_print(bp, pkey->pkey.ec, indent, 1);
597}
598
599
600static int
601eckey_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent, ASN1_PCTX *ctx)
602{
603 return do_EC_KEY_print(bp, pkey->pkey.ec, indent, 2);
604}
605
606static int
607old_ec_priv_decode(EVP_PKEY *pkey, const unsigned char **priv, int priv_len)
608{
609 EC_KEY *eckey;
610 int ret = 0;
611
612 if ((eckey = d2i_ECPrivateKey(NULL, priv, priv_len)) == NULL)
613 goto err;
614 if (!EVP_PKEY_assign_EC_KEY(pkey, eckey))
615 goto err;
616 eckey = NULL;
617
618 ret = 1;
619
620 err:
621 EC_KEY_free(eckey);
622
623 return ret;
624}
625
626static int
627old_ec_priv_encode(const EVP_PKEY *pkey, unsigned char **priv)
628{
629 return i2d_ECPrivateKey(pkey->pkey.ec, priv);
630}
631
632static int
633ec_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
634{
635 switch (op) {
636 case ASN1_PKEY_CTRL_PKCS7_SIGN:
637 if (arg1 == 0) {
638 int snid, hnid;
639 X509_ALGOR *alg1, *alg2;
640 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
641 if (alg1 == NULL || alg1->algorithm == NULL)
642 return -1;
643 hnid = OBJ_obj2nid(alg1->algorithm);
644 if (hnid == NID_undef)
645 return -1;
646 if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
647 return -1;
648 if (!X509_ALGOR_set0_by_nid(alg2, snid, V_ASN1_UNDEF,
649 NULL))
650 return -1;
651 }
652 return 1;
653
654#ifndef OPENSSL_NO_CMS
655 case ASN1_PKEY_CTRL_CMS_SIGN:
656 if (arg1 == 0) {
657 X509_ALGOR *alg1, *alg2;
658 int snid, hnid;
659
660 CMS_SignerInfo_get0_algs(arg2, NULL, NULL, &alg1, &alg2);
661 if (alg1 == NULL || alg1->algorithm == NULL)
662 return -1;
663 hnid = OBJ_obj2nid(alg1->algorithm);
664 if (hnid == NID_undef)
665 return -1;
666 if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
667 return -1;
668 if (!X509_ALGOR_set0_by_nid(alg2, snid, V_ASN1_UNDEF,
669 NULL))
670 return -1;
671 }
672 return 1;
673
674 case ASN1_PKEY_CTRL_CMS_ENVELOPE:
675 if (arg1 == 0)
676 return ecdh_cms_encrypt(arg2);
677 else if (arg1 == 1)
678 return ecdh_cms_decrypt(arg2);
679 return -2;
680
681 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
682 *(int *)arg2 = CMS_RECIPINFO_AGREE;
683 return 1;
684#endif
685
686 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
687 *(int *) arg2 = NID_sha1;
688 return 2;
689
690 default:
691 return -2;
692
693 }
694
695}
696
697#ifndef OPENSSL_NO_CMS
698
699static int
700ecdh_cms_set_peerkey(EVP_PKEY_CTX *pctx, X509_ALGOR *alg,
701 ASN1_BIT_STRING *pubkey)
702{
703 const ASN1_OBJECT *aoid;
704 int atype;
705 const void *aval;
706 int rv = 0;
707 EVP_PKEY *pkpeer = NULL;
708 EC_KEY *ecpeer = NULL;
709 const unsigned char *p;
710 int plen;
711
712 X509_ALGOR_get0(&aoid, &atype, &aval, alg);
713 if (OBJ_obj2nid(aoid) != NID_X9_62_id_ecPublicKey)
714 goto err;
715
716 /* If absent parameters get group from main key */
717 if (atype == V_ASN1_UNDEF || atype == V_ASN1_NULL) {
718 const EC_GROUP *grp;
719 EVP_PKEY *pk;
720
721 pk = EVP_PKEY_CTX_get0_pkey(pctx);
722 if (!pk)
723 goto err;
724 grp = EC_KEY_get0_group(pk->pkey.ec);
725 ecpeer = EC_KEY_new();
726 if (ecpeer == NULL)
727 goto err;
728 if (!EC_KEY_set_group(ecpeer, grp))
729 goto err;
730 } else {
731 if (!eckey_from_params(atype, aval, &ecpeer))
732 goto err;
733 }
734
735 /* We have parameters now set public key */
736 plen = ASN1_STRING_length(pubkey);
737 p = ASN1_STRING_get0_data(pubkey);
738 if (!p || !plen)
739 goto err;
740 if (!o2i_ECPublicKey(&ecpeer, &p, plen))
741 goto err;
742 pkpeer = EVP_PKEY_new();
743 if (pkpeer == NULL)
744 goto err;
745 EVP_PKEY_set1_EC_KEY(pkpeer, ecpeer);
746 if (EVP_PKEY_derive_set_peer(pctx, pkpeer) > 0)
747 rv = 1;
748 err:
749 EC_KEY_free(ecpeer);
750 EVP_PKEY_free(pkpeer);
751 return rv;
752}
753
754/* Set KDF parameters based on KDF NID */
755static int
756ecdh_cms_set_kdf_param(EVP_PKEY_CTX *pctx, int eckdf_nid)
757{
758 int kdf_nid, kdfmd_nid, cofactor;
759 const EVP_MD *kdf_md;
760
761 if (eckdf_nid == NID_undef)
762 return 0;
763
764 /* Lookup KDF type, cofactor mode and digest */
765 if (!OBJ_find_sigid_algs(eckdf_nid, &kdfmd_nid, &kdf_nid))
766 return 0;
767
768 if (kdf_nid == NID_dh_std_kdf)
769 cofactor = 0;
770 else if (kdf_nid == NID_dh_cofactor_kdf)
771 cofactor = 1;
772 else
773 return 0;
774
775 if (EVP_PKEY_CTX_set_ecdh_cofactor_mode(pctx, cofactor) <= 0)
776 return 0;
777
778 if (EVP_PKEY_CTX_set_ecdh_kdf_type(pctx, EVP_PKEY_ECDH_KDF_X9_63) <= 0)
779 return 0;
780
781 kdf_md = EVP_get_digestbynid(kdfmd_nid);
782 if (!kdf_md)
783 return 0;
784
785 if (EVP_PKEY_CTX_set_ecdh_kdf_md(pctx, kdf_md) <= 0)
786 return 0;
787
788 return 1;
789}
790
791static int
792ecdh_cms_set_shared_info(EVP_PKEY_CTX *pctx, CMS_RecipientInfo *ri)
793{
794 X509_ALGOR *alg, *kekalg = NULL;
795 const ASN1_OBJECT *obj;
796 int nid;
797 const void *parameter;
798 int parameter_type;
799 ASN1_OCTET_STRING *ukm;
800 const unsigned char *p;
801 unsigned char *der = NULL;
802 int plen, keylen;
803 const EVP_CIPHER *kekcipher;
804 EVP_CIPHER_CTX *kekctx;
805 int ret = 0;
806
807 if (!CMS_RecipientInfo_kari_get0_alg(ri, &alg, &ukm))
808 goto err;
809
810 X509_ALGOR_get0(&obj, &parameter_type, &parameter, alg);
811
812 if ((nid = OBJ_obj2nid(obj)) == NID_undef)
813 goto err;
814 if (!ecdh_cms_set_kdf_param(pctx, nid)) {
815 ECerror(EC_R_KDF_PARAMETER_ERROR);
816 goto err;
817 }
818
819 if (parameter_type != V_ASN1_SEQUENCE)
820 goto err;
821 if ((p = ASN1_STRING_get0_data(parameter)) == NULL)
822 goto err;
823 plen = ASN1_STRING_length(parameter);
824 if ((kekalg = d2i_X509_ALGOR(NULL, &p, plen)) == NULL)
825 goto err;
826
827 /*
828 * XXX - the reaching into kekalg below is ugly, but unfortunately the
829 * now internal legacy EVP_CIPHER_asn1_to_param() API doesn't interact
830 * nicely with the X509_ALGOR API.
831 */
832
833 if ((kekctx = CMS_RecipientInfo_kari_get0_ctx(ri)) == NULL)
834 goto err;
835 if ((kekcipher = EVP_get_cipherbyobj(kekalg->algorithm)) == NULL)
836 goto err;
837 if (EVP_CIPHER_mode(kekcipher) != EVP_CIPH_WRAP_MODE)
838 goto err;
839 if (!EVP_EncryptInit_ex(kekctx, kekcipher, NULL, NULL, NULL))
840 goto err;
841 if (EVP_CIPHER_asn1_to_param(kekctx, kekalg->parameter) <= 0)
842 goto err;
843
844 keylen = EVP_CIPHER_CTX_key_length(kekctx);
845 if (EVP_PKEY_CTX_set_ecdh_kdf_outlen(pctx, keylen) <= 0)
846 goto err;
847
848 if ((plen = CMS_SharedInfo_encode(&der, kekalg, ukm, keylen)) <= 0)
849 goto err;
850
851 if (EVP_PKEY_CTX_set0_ecdh_kdf_ukm(pctx, der, plen) <= 0)
852 goto err;
853 der = NULL;
854
855 ret = 1;
856
857 err:
858 X509_ALGOR_free(kekalg);
859 free(der);
860
861 return ret;
862}
863
864static int
865ecdh_cms_decrypt(CMS_RecipientInfo *ri)
866{
867 EVP_PKEY_CTX *pctx;
868
869 pctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
870 if (!pctx)
871 return 0;
872
873 /* See if we need to set peer key */
874 if (!EVP_PKEY_CTX_get0_peerkey(pctx)) {
875 X509_ALGOR *alg;
876 ASN1_BIT_STRING *pubkey;
877
878 if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &alg, &pubkey,
879 NULL, NULL, NULL))
880 return 0;
881 if (!alg || !pubkey)
882 return 0;
883 if (!ecdh_cms_set_peerkey(pctx, alg, pubkey)) {
884 ECerror(EC_R_PEER_KEY_ERROR);
885 return 0;
886 }
887 }
888
889 /* Set ECDH derivation parameters and initialise unwrap context */
890 if (!ecdh_cms_set_shared_info(pctx, ri)) {
891 ECerror(EC_R_SHARED_INFO_ERROR);
892 return 0;
893 }
894
895 return 1;
896}
897
898static int
899ecdh_cms_encrypt(CMS_RecipientInfo *ri)
900{
901 EVP_PKEY_CTX *pctx;
902 EVP_CIPHER_CTX *ctx;
903 int keylen;
904 X509_ALGOR *talg, *wrap_alg = NULL;
905 const ASN1_OBJECT *aoid;
906 ASN1_BIT_STRING *pubkey;
907 ASN1_STRING *wrap_str = NULL;
908 ASN1_OCTET_STRING *ukm;
909 unsigned char *penc = NULL;
910 int penclen;
911 int ecdh_nid, kdf_nid, wrap_nid;
912 const EVP_MD *kdf_md;
913 int ret = 0;
914
915 if ((pctx = CMS_RecipientInfo_get0_pkey_ctx(ri)) == NULL)
916 goto err;
917 if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &talg, &pubkey,
918 NULL, NULL, NULL))
919 goto err;
920
921 X509_ALGOR_get0(&aoid, NULL, NULL, talg);
922 if (aoid == OBJ_nid2obj(NID_undef)) {
923 EVP_PKEY *pkey;
924
925 if ((pkey = EVP_PKEY_CTX_get0_pkey(pctx)) == NULL)
926 goto err;
927
928 penc = NULL;
929 if ((penclen = i2o_ECPublicKey(pkey->pkey.ec, &penc)) <= 0)
930 goto err;
931
932 ASN1_STRING_set0(pubkey, penc, penclen);
933 penc = NULL;
934
935 if (!asn1_abs_set_unused_bits(pubkey, 0))
936 goto err;
937
938 if (!X509_ALGOR_set0_by_nid(talg, NID_X9_62_id_ecPublicKey,
939 V_ASN1_UNDEF, NULL))
940 goto err;
941 }
942
943 if (EVP_PKEY_CTX_get_ecdh_kdf_type(pctx) != EVP_PKEY_ECDH_KDF_NONE)
944 goto err;
945 if (EVP_PKEY_CTX_set_ecdh_kdf_type(pctx, EVP_PKEY_ECDH_KDF_X9_63) <= 0)
946 goto err;
947
948 if ((ecdh_nid = EVP_PKEY_CTX_get_ecdh_cofactor_mode(pctx)) < 0)
949 goto err;
950 if (ecdh_nid == 0)
951 ecdh_nid = NID_dh_std_kdf;
952 else if (ecdh_nid == 1)
953 ecdh_nid = NID_dh_cofactor_kdf;
954
955 if (!EVP_PKEY_CTX_get_ecdh_kdf_md(pctx, &kdf_md))
956 goto err;
957 if (kdf_md == NULL) {
958 /* Fixme later for better MD */
959 kdf_md = EVP_sha1();
960 if (EVP_PKEY_CTX_set_ecdh_kdf_md(pctx, kdf_md) <= 0)
961 goto err;
962 }
963
964 if (!CMS_RecipientInfo_kari_get0_alg(ri, &talg, &ukm))
965 goto err;
966
967 /* Lookup NID for KDF+cofactor+digest */
968 if (!OBJ_find_sigid_by_algs(&kdf_nid, EVP_MD_type(kdf_md), ecdh_nid))
969 goto err;
970
971 /* Get wrap NID */
972 ctx = CMS_RecipientInfo_kari_get0_ctx(ri);
973 wrap_nid = EVP_CIPHER_CTX_type(ctx);
974 keylen = EVP_CIPHER_CTX_key_length(ctx);
975
976 /*
977 * Package wrap algorithm in an AlgorithmIdentifier.
978 *
979 * Incompatibility of X509_ALGOR_set0() with EVP_CIPHER_param_to_asn1()
980 * makes this really gross. See the XXX in ecdh_cms_set_shared_info().
981 */
982
983 if ((wrap_alg = X509_ALGOR_new()) == NULL)
984 goto err;
985 if ((wrap_alg->algorithm = OBJ_nid2obj(wrap_nid)) == NULL)
986 goto err;
987 if ((wrap_alg->parameter = ASN1_TYPE_new()) == NULL)
988 goto err;
989 if (EVP_CIPHER_param_to_asn1(ctx, wrap_alg->parameter) <= 0)
990 goto err;
991 if (ASN1_TYPE_get(wrap_alg->parameter) == V_ASN1_UNDEF) {
992 ASN1_TYPE_free(wrap_alg->parameter);
993 wrap_alg->parameter = NULL;
994 }
995
996 if ((penclen = CMS_SharedInfo_encode(&penc, wrap_alg, ukm, keylen)) <= 0)
997 goto err;
998
999 if (EVP_PKEY_CTX_set_ecdh_kdf_outlen(pctx, keylen) <= 0)
1000 goto err;
1001 if (EVP_PKEY_CTX_set0_ecdh_kdf_ukm(pctx, penc, penclen) <= 0)
1002 goto err;
1003 penc = NULL;
1004
1005 /*
1006 * Wrap encoded wrap AlgorithmIdentifier into parameter of another
1007 * AlgorithmIdentifier.
1008 */
1009
1010 if ((penclen = i2d_X509_ALGOR(wrap_alg, &penc)) <= 0)
1011 goto err;
1012
1013 if ((wrap_str = ASN1_STRING_new()) == NULL)
1014 goto err;
1015 ASN1_STRING_set0(wrap_str, penc, penclen);
1016 penc = NULL;
1017
1018 if (!X509_ALGOR_set0_by_nid(talg, kdf_nid, V_ASN1_SEQUENCE, wrap_str))
1019 goto err;
1020 wrap_str = NULL;
1021
1022 ret = 1;
1023
1024 err:
1025 free(penc);
1026 ASN1_STRING_free(wrap_str);
1027 X509_ALGOR_free(wrap_alg);
1028
1029 return ret;
1030}
1031
1032#endif
1033
1034const EVP_PKEY_ASN1_METHOD eckey_asn1_meth = {
1035 .base_method = &eckey_asn1_meth,
1036 .pkey_id = EVP_PKEY_EC,
1037
1038 .pem_str = "EC",
1039 .info = "OpenSSL EC algorithm",
1040
1041 .pub_decode = eckey_pub_decode,
1042 .pub_encode = eckey_pub_encode,
1043 .pub_cmp = eckey_pub_cmp,
1044 .pub_print = eckey_pub_print,
1045
1046 .priv_decode = eckey_priv_decode,
1047 .priv_encode = eckey_priv_encode,
1048 .priv_print = eckey_priv_print,
1049
1050 .pkey_size = ec_size,
1051 .pkey_bits = ec_bits,
1052 .pkey_security_bits = ec_security_bits,
1053
1054 .param_decode = eckey_param_decode,
1055 .param_encode = eckey_param_encode,
1056 .param_missing = ec_missing_parameters,
1057 .param_copy = ec_copy_parameters,
1058 .param_cmp = ec_cmp_parameters,
1059 .param_print = eckey_param_print,
1060
1061 .pkey_free = ec_free,
1062 .pkey_ctrl = ec_pkey_ctrl,
1063 .old_priv_decode = old_ec_priv_decode,
1064 .old_priv_encode = old_ec_priv_encode,
1065};
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-12-23 15:17:13 +0000