1 /*
2 * Copyright 2006-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
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
8 */
9
10 /*
11 * ECDH and ECDSA low level APIs are deprecated for public use, but still ok
12 * for internal use.
13 */
14 #include "internal/deprecated.h"
15
16 #include <stdio.h>
17 #include "internal/cryptlib.h"
18 #include <openssl/x509.h>
19 #include <openssl/ec.h>
20 #include <openssl/bn.h>
21 #include <openssl/asn1t.h>
22 #include "crypto/asn1.h"
23 #include "crypto/evp.h"
24 #include "crypto/x509.h"
25 #include <openssl/core_names.h>
26 #include <openssl/param_build.h>
27 #include "ec_local.h"
28
eckey_param2type(int * pptype,void ** ppval,const EC_KEY * ec_key)29 static int eckey_param2type(int *pptype, void **ppval, const EC_KEY *ec_key)
30 {
31 const EC_GROUP *group;
32 int nid;
33
34 if (ec_key == NULL || (group = EC_KEY_get0_group(ec_key)) == NULL) {
35 ERR_raise(ERR_LIB_EC, EC_R_MISSING_PARAMETERS);
36 return 0;
37 }
38 if (EC_GROUP_get_asn1_flag(group)
39 && (nid = EC_GROUP_get_curve_name(group)))
40 /* we have a 'named curve' => just set the OID */
41 {
42 ASN1_OBJECT *asn1obj = OBJ_nid2obj(nid);
43
44 if (asn1obj == NULL || OBJ_length(asn1obj) == 0) {
45 ASN1_OBJECT_free(asn1obj);
46 ERR_raise(ERR_LIB_EC, EC_R_MISSING_OID);
47 return 0;
48 }
49 *ppval = asn1obj;
50 *pptype = V_ASN1_OBJECT;
51 } else { /* explicit parameters */
52
53 ASN1_STRING *pstr = NULL;
54 pstr = ASN1_STRING_new();
55 if (pstr == NULL)
56 return 0;
57 pstr->length = i2d_ECParameters(ec_key, &pstr->data);
58 if (pstr->length <= 0) {
59 ASN1_STRING_free(pstr);
60 ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB);
61 return 0;
62 }
63 *ppval = pstr;
64 *pptype = V_ASN1_SEQUENCE;
65 }
66 return 1;
67 }
68
eckey_pub_encode(X509_PUBKEY * pk,const EVP_PKEY * pkey)69 static int eckey_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
70 {
71 const EC_KEY *ec_key = pkey->pkey.ec;
72 void *pval = NULL;
73 int ptype;
74 unsigned char *penc = NULL, *p;
75 int penclen;
76
77 if (!eckey_param2type(&ptype, &pval, ec_key)) {
78 ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB);
79 return 0;
80 }
81 penclen = i2o_ECPublicKey(ec_key, NULL);
82 if (penclen <= 0)
83 goto err;
84 penc = OPENSSL_malloc(penclen);
85 if (penc == NULL)
86 goto err;
87 p = penc;
88 penclen = i2o_ECPublicKey(ec_key, &p);
89 if (penclen <= 0)
90 goto err;
91 if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_EC),
92 ptype, pval, penc, penclen))
93 return 1;
94 err:
95 if (ptype == V_ASN1_OBJECT)
96 ASN1_OBJECT_free(pval);
97 else
98 ASN1_STRING_free(pval);
99 OPENSSL_free(penc);
100 return 0;
101 }
102
eckey_pub_decode(EVP_PKEY * pkey,const X509_PUBKEY * pubkey)103 static int eckey_pub_decode(EVP_PKEY *pkey, const X509_PUBKEY *pubkey)
104 {
105 const unsigned char *p = NULL;
106 int pklen;
107 EC_KEY *eckey = NULL;
108 X509_ALGOR *palg;
109 OSSL_LIB_CTX *libctx = NULL;
110 const char *propq = NULL;
111
112 if (!ossl_x509_PUBKEY_get0_libctx(&libctx, &propq, pubkey)
113 || !X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
114 return 0;
115 eckey = ossl_ec_key_param_from_x509_algor(palg, libctx, propq);
116
117 if (!eckey)
118 return 0;
119
120 /* We have parameters now set public key */
121 if (!o2i_ECPublicKey(&eckey, &p, pklen)) {
122 ERR_raise(ERR_LIB_EC, EC_R_DECODE_ERROR);
123 goto ecerr;
124 }
125
126 EVP_PKEY_assign_EC_KEY(pkey, eckey);
127 return 1;
128
129 ecerr:
130 EC_KEY_free(eckey);
131 return 0;
132 }
133
eckey_pub_cmp(const EVP_PKEY * a,const EVP_PKEY * b)134 static int eckey_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
135 {
136 int r;
137 const EC_GROUP *group = EC_KEY_get0_group(b->pkey.ec);
138 const EC_POINT *pa = EC_KEY_get0_public_key(a->pkey.ec),
139 *pb = EC_KEY_get0_public_key(b->pkey.ec);
140
141 if (group == NULL || pa == NULL || pb == NULL)
142 return -2;
143 r = EC_POINT_cmp(group, pa, pb, NULL);
144 if (r == 0)
145 return 1;
146 if (r == 1)
147 return 0;
148 return -2;
149 }
150
eckey_priv_decode_ex(EVP_PKEY * pkey,const PKCS8_PRIV_KEY_INFO * p8,OSSL_LIB_CTX * libctx,const char * propq)151 static int eckey_priv_decode_ex(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8,
152 OSSL_LIB_CTX *libctx, const char *propq)
153 {
154 int ret = 0;
155 EC_KEY *eckey = ossl_ec_key_from_pkcs8(p8, libctx, propq);
156
157 if (eckey != NULL) {
158 ret = 1;
159 EVP_PKEY_assign_EC_KEY(pkey, eckey);
160 }
161
162 return ret;
163 }
164
eckey_priv_encode(PKCS8_PRIV_KEY_INFO * p8,const EVP_PKEY * pkey)165 static int eckey_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
166 {
167 EC_KEY ec_key = *(pkey->pkey.ec);
168 unsigned char *ep, *p;
169 int eplen, ptype;
170 void *pval;
171 unsigned int old_flags;
172
173 if (!eckey_param2type(&ptype, &pval, &ec_key)) {
174 ERR_raise(ERR_LIB_EC, EC_R_DECODE_ERROR);
175 return 0;
176 }
177
178 /* set the private key */
179
180 /*
181 * do not include the parameters in the SEC1 private key see PKCS#11
182 * 12.11
183 */
184 old_flags = EC_KEY_get_enc_flags(&ec_key);
185 EC_KEY_set_enc_flags(&ec_key, old_flags | EC_PKEY_NO_PARAMETERS);
186
187 eplen = i2d_ECPrivateKey(&ec_key, NULL);
188 if (!eplen) {
189 ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB);
190 return 0;
191 }
192 ep = OPENSSL_malloc(eplen);
193 if (ep == NULL) {
194 ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE);
195 return 0;
196 }
197 p = ep;
198 if (!i2d_ECPrivateKey(&ec_key, &p)) {
199 OPENSSL_free(ep);
200 ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB);
201 return 0;
202 }
203
204 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_X9_62_id_ecPublicKey), 0,
205 ptype, pval, ep, eplen)) {
206 OPENSSL_free(ep);
207 return 0;
208 }
209
210 return 1;
211 }
212
int_ec_size(const EVP_PKEY * pkey)213 static int int_ec_size(const EVP_PKEY *pkey)
214 {
215 return ECDSA_size(pkey->pkey.ec);
216 }
217
ec_bits(const EVP_PKEY * pkey)218 static int ec_bits(const EVP_PKEY *pkey)
219 {
220 return EC_GROUP_order_bits(EC_KEY_get0_group(pkey->pkey.ec));
221 }
222
ec_security_bits(const EVP_PKEY * pkey)223 static int ec_security_bits(const EVP_PKEY *pkey)
224 {
225 int ecbits = ec_bits(pkey);
226
227 if (ecbits >= 512)
228 return 256;
229 if (ecbits >= 384)
230 return 192;
231 if (ecbits >= 256)
232 return 128;
233 if (ecbits >= 224)
234 return 112;
235 if (ecbits >= 160)
236 return 80;
237 return ecbits / 2;
238 }
239
ec_missing_parameters(const EVP_PKEY * pkey)240 static int ec_missing_parameters(const EVP_PKEY *pkey)
241 {
242 if (pkey->pkey.ec == NULL || EC_KEY_get0_group(pkey->pkey.ec) == NULL)
243 return 1;
244 return 0;
245 }
246
ec_copy_parameters(EVP_PKEY * to,const EVP_PKEY * from)247 static int ec_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
248 {
249 EC_GROUP *group = EC_GROUP_dup(EC_KEY_get0_group(from->pkey.ec));
250
251 if (group == NULL)
252 return 0;
253 if (to->pkey.ec == NULL) {
254 to->pkey.ec = EC_KEY_new();
255 if (to->pkey.ec == NULL)
256 goto err;
257 }
258 if (EC_KEY_set_group(to->pkey.ec, group) == 0)
259 goto err;
260 EC_GROUP_free(group);
261 return 1;
262 err:
263 EC_GROUP_free(group);
264 return 0;
265 }
266
ec_cmp_parameters(const EVP_PKEY * a,const EVP_PKEY * b)267 static int ec_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
268 {
269 const EC_GROUP *group_a = EC_KEY_get0_group(a->pkey.ec),
270 *group_b = EC_KEY_get0_group(b->pkey.ec);
271
272 if (group_a == NULL || group_b == NULL)
273 return -2;
274 if (EC_GROUP_cmp(group_a, group_b, NULL))
275 return 0;
276 else
277 return 1;
278 }
279
int_ec_free(EVP_PKEY * pkey)280 static void int_ec_free(EVP_PKEY *pkey)
281 {
282 EC_KEY_free(pkey->pkey.ec);
283 }
284
285 typedef enum {
286 EC_KEY_PRINT_PRIVATE,
287 EC_KEY_PRINT_PUBLIC,
288 EC_KEY_PRINT_PARAM
289 } ec_print_t;
290
do_EC_KEY_print(BIO * bp,const EC_KEY * x,int off,ec_print_t ktype)291 static int do_EC_KEY_print(BIO *bp, const EC_KEY *x, int off, ec_print_t ktype)
292 {
293 const char *ecstr;
294 unsigned char *priv = NULL, *pub = NULL;
295 size_t privlen = 0, publen = 0;
296 int ret = 0;
297 const EC_GROUP *group;
298
299 if (x == NULL || (group = EC_KEY_get0_group(x)) == NULL) {
300 ERR_raise(ERR_LIB_EC, ERR_R_PASSED_NULL_PARAMETER);
301 return 0;
302 }
303
304 if (ktype != EC_KEY_PRINT_PARAM && EC_KEY_get0_public_key(x) != NULL) {
305 publen = EC_KEY_key2buf(x, EC_KEY_get_conv_form(x), &pub, NULL);
306 if (publen == 0)
307 goto err;
308 }
309
310 if (ktype == EC_KEY_PRINT_PRIVATE && EC_KEY_get0_private_key(x) != NULL) {
311 privlen = EC_KEY_priv2buf(x, &priv);
312 if (privlen == 0)
313 goto err;
314 }
315
316 if (ktype == EC_KEY_PRINT_PRIVATE)
317 ecstr = "Private-Key";
318 else if (ktype == EC_KEY_PRINT_PUBLIC)
319 ecstr = "Public-Key";
320 else
321 ecstr = "ECDSA-Parameters";
322
323 if (!BIO_indent(bp, off, 128))
324 goto err;
325 if (BIO_printf(bp, "%s: (%d bit)\n", ecstr,
326 EC_GROUP_order_bits(group)) <= 0)
327 goto err;
328
329 if (privlen != 0) {
330 if (BIO_printf(bp, "%*spriv:\n", off, "") <= 0)
331 goto err;
332 if (ASN1_buf_print(bp, priv, privlen, off + 4) == 0)
333 goto err;
334 }
335
336 if (publen != 0) {
337 if (BIO_printf(bp, "%*spub:\n", off, "") <= 0)
338 goto err;
339 if (ASN1_buf_print(bp, pub, publen, off + 4) == 0)
340 goto err;
341 }
342
343 if (!ECPKParameters_print(bp, group, off))
344 goto err;
345 ret = 1;
346 err:
347 if (!ret)
348 ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB);
349 OPENSSL_clear_free(priv, privlen);
350 OPENSSL_free(pub);
351 return ret;
352 }
353
eckey_param_decode(EVP_PKEY * pkey,const unsigned char ** pder,int derlen)354 static int eckey_param_decode(EVP_PKEY *pkey,
355 const unsigned char **pder, int derlen)
356 {
357 EC_KEY *eckey;
358
359 if ((eckey = d2i_ECParameters(NULL, pder, derlen)) == NULL)
360 return 0;
361 EVP_PKEY_assign_EC_KEY(pkey, eckey);
362 return 1;
363 }
364
eckey_param_encode(const EVP_PKEY * pkey,unsigned char ** pder)365 static int eckey_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
366 {
367 return i2d_ECParameters(pkey->pkey.ec, pder);
368 }
369
eckey_param_print(BIO * bp,const EVP_PKEY * pkey,int indent,ASN1_PCTX * ctx)370 static int eckey_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
371 ASN1_PCTX *ctx)
372 {
373 return do_EC_KEY_print(bp, pkey->pkey.ec, indent, EC_KEY_PRINT_PARAM);
374 }
375
eckey_pub_print(BIO * bp,const EVP_PKEY * pkey,int indent,ASN1_PCTX * ctx)376 static int eckey_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
377 ASN1_PCTX *ctx)
378 {
379 return do_EC_KEY_print(bp, pkey->pkey.ec, indent, EC_KEY_PRINT_PUBLIC);
380 }
381
eckey_priv_print(BIO * bp,const EVP_PKEY * pkey,int indent,ASN1_PCTX * ctx)382 static int eckey_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
383 ASN1_PCTX *ctx)
384 {
385 return do_EC_KEY_print(bp, pkey->pkey.ec, indent, EC_KEY_PRINT_PRIVATE);
386 }
387
old_ec_priv_decode(EVP_PKEY * pkey,const unsigned char ** pder,int derlen)388 static int old_ec_priv_decode(EVP_PKEY *pkey,
389 const unsigned char **pder, int derlen)
390 {
391 EC_KEY *ec;
392
393 if ((ec = d2i_ECPrivateKey(NULL, pder, derlen)) == NULL)
394 return 0;
395 EVP_PKEY_assign_EC_KEY(pkey, ec);
396 return 1;
397 }
398
old_ec_priv_encode(const EVP_PKEY * pkey,unsigned char ** pder)399 static int old_ec_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
400 {
401 return i2d_ECPrivateKey(pkey->pkey.ec, pder);
402 }
403
ec_pkey_ctrl(EVP_PKEY * pkey,int op,long arg1,void * arg2)404 static int ec_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
405 {
406 switch (op) {
407 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
408 if (EVP_PKEY_get_id(pkey) == EVP_PKEY_SM2) {
409 /* For SM2, the only valid digest-alg is SM3 */
410 *(int *)arg2 = NID_sm3;
411 return 2; /* Make it mandatory */
412 }
413 *(int *)arg2 = NID_sha256;
414 return 1;
415
416 case ASN1_PKEY_CTRL_SET1_TLS_ENCPT:
417 /* We should only be here if we have a legacy key */
418 if (!ossl_assert(evp_pkey_is_legacy(pkey)))
419 return 0;
420 return EC_KEY_oct2key(evp_pkey_get0_EC_KEY_int(pkey), arg2, arg1, NULL);
421
422 case ASN1_PKEY_CTRL_GET1_TLS_ENCPT:
423 return EC_KEY_key2buf(EVP_PKEY_get0_EC_KEY(pkey),
424 POINT_CONVERSION_UNCOMPRESSED, arg2, NULL);
425
426 default:
427 return -2;
428 }
429 }
430
ec_pkey_check(const EVP_PKEY * pkey)431 static int ec_pkey_check(const EVP_PKEY *pkey)
432 {
433 EC_KEY *eckey = pkey->pkey.ec;
434
435 /* stay consistent to what EVP_PKEY_check demands */
436 if (eckey->priv_key == NULL) {
437 ERR_raise(ERR_LIB_EC, EC_R_MISSING_PRIVATE_KEY);
438 return 0;
439 }
440
441 return EC_KEY_check_key(eckey);
442 }
443
ec_pkey_public_check(const EVP_PKEY * pkey)444 static int ec_pkey_public_check(const EVP_PKEY *pkey)
445 {
446 EC_KEY *eckey = pkey->pkey.ec;
447
448 /*
449 * Note: it unnecessary to check eckey->pub_key here since
450 * it will be checked in EC_KEY_check_key(). In fact, the
451 * EC_KEY_check_key() mainly checks the public key, and checks
452 * the private key optionally (only if there is one). So if
453 * someone passes a whole EC key (public + private), this
454 * will also work...
455 */
456
457 return EC_KEY_check_key(eckey);
458 }
459
ec_pkey_param_check(const EVP_PKEY * pkey)460 static int ec_pkey_param_check(const EVP_PKEY *pkey)
461 {
462 EC_KEY *eckey = pkey->pkey.ec;
463
464 /* stay consistent to what EVP_PKEY_check demands */
465 if (eckey->group == NULL) {
466 ERR_raise(ERR_LIB_EC, EC_R_MISSING_PARAMETERS);
467 return 0;
468 }
469
470 return EC_GROUP_check(eckey->group, NULL);
471 }
472
473 static
ec_pkey_dirty_cnt(const EVP_PKEY * pkey)474 size_t ec_pkey_dirty_cnt(const EVP_PKEY *pkey)
475 {
476 return pkey->pkey.ec->dirty_cnt;
477 }
478
479 static
ec_pkey_export_to(const EVP_PKEY * from,void * to_keydata,OSSL_FUNC_keymgmt_import_fn * importer,OSSL_LIB_CTX * libctx,const char * propq)480 int ec_pkey_export_to(const EVP_PKEY *from, void *to_keydata,
481 OSSL_FUNC_keymgmt_import_fn *importer,
482 OSSL_LIB_CTX *libctx, const char *propq)
483 {
484 const EC_KEY *eckey = NULL;
485 const EC_GROUP *ecg = NULL;
486 unsigned char *pub_key_buf = NULL, *gen_buf = NULL;
487 size_t pub_key_buflen;
488 OSSL_PARAM_BLD *tmpl;
489 OSSL_PARAM *params = NULL;
490 const BIGNUM *priv_key = NULL;
491 const EC_POINT *pub_point = NULL;
492 int selection = 0;
493 int rv = 0;
494 BN_CTX *bnctx = NULL;
495
496 if (from == NULL
497 || (eckey = from->pkey.ec) == NULL
498 || (ecg = EC_KEY_get0_group(eckey)) == NULL)
499 return 0;
500
501 tmpl = OSSL_PARAM_BLD_new();
502 if (tmpl == NULL)
503 return 0;
504
505 /*
506 * EC_POINT_point2buf() can generate random numbers in some
507 * implementations so we need to ensure we use the correct libctx.
508 */
509 bnctx = BN_CTX_new_ex(libctx);
510 if (bnctx == NULL)
511 goto err;
512 BN_CTX_start(bnctx);
513
514 /* export the domain parameters */
515 if (!ossl_ec_group_todata(ecg, tmpl, NULL, libctx, propq, bnctx, &gen_buf))
516 goto err;
517 selection |= OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS;
518
519 priv_key = EC_KEY_get0_private_key(eckey);
520 pub_point = EC_KEY_get0_public_key(eckey);
521
522 if (pub_point != NULL) {
523 /* convert pub_point to a octet string according to the SECG standard */
524 if ((pub_key_buflen = EC_POINT_point2buf(ecg, pub_point,
525 POINT_CONVERSION_COMPRESSED,
526 &pub_key_buf, bnctx)) == 0
527 || !OSSL_PARAM_BLD_push_octet_string(tmpl,
528 OSSL_PKEY_PARAM_PUB_KEY,
529 pub_key_buf,
530 pub_key_buflen))
531 goto err;
532 selection |= OSSL_KEYMGMT_SELECT_PUBLIC_KEY;
533 }
534
535 if (priv_key != NULL) {
536 size_t sz;
537 int ecbits;
538 int ecdh_cofactor_mode;
539
540 /*
541 * Key import/export should never leak the bit length of the secret
542 * scalar in the key.
543 *
544 * For this reason, on export we use padded BIGNUMs with fixed length.
545 *
546 * When importing we also should make sure that, even if short lived,
547 * the newly created BIGNUM is marked with the BN_FLG_CONSTTIME flag as
548 * soon as possible, so that any processing of this BIGNUM might opt for
549 * constant time implementations in the backend.
550 *
551 * Setting the BN_FLG_CONSTTIME flag alone is never enough, we also have
552 * to preallocate the BIGNUM internal buffer to a fixed public size big
553 * enough that operations performed during the processing never trigger
554 * a realloc which would leak the size of the scalar through memory
555 * accesses.
556 *
557 * Fixed Length
558 * ------------
559 *
560 * The order of the large prime subgroup of the curve is our choice for
561 * a fixed public size, as that is generally the upper bound for
562 * generating a private key in EC cryptosystems and should fit all valid
563 * secret scalars.
564 *
565 * For padding on export we just use the bit length of the order
566 * converted to bytes (rounding up).
567 *
568 * For preallocating the BIGNUM storage we look at the number of "words"
569 * required for the internal representation of the order, and we
570 * preallocate 2 extra "words" in case any of the subsequent processing
571 * might temporarily overflow the order length.
572 */
573 ecbits = EC_GROUP_order_bits(ecg);
574 if (ecbits <= 0)
575 goto err;
576
577 sz = (ecbits + 7 ) / 8;
578 if (!OSSL_PARAM_BLD_push_BN_pad(tmpl,
579 OSSL_PKEY_PARAM_PRIV_KEY,
580 priv_key, sz))
581 goto err;
582 selection |= OSSL_KEYMGMT_SELECT_PRIVATE_KEY;
583
584 /*
585 * The ECDH Cofactor Mode is defined only if the EC_KEY actually
586 * contains a private key, so we check for the flag and export it only
587 * in this case.
588 */
589 ecdh_cofactor_mode =
590 (EC_KEY_get_flags(eckey) & EC_FLAG_COFACTOR_ECDH) ? 1 : 0;
591
592 /* Export the ECDH_COFACTOR_MODE parameter */
593 if (!OSSL_PARAM_BLD_push_int(tmpl,
594 OSSL_PKEY_PARAM_USE_COFACTOR_ECDH,
595 ecdh_cofactor_mode))
596 goto err;
597 selection |= OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS;
598 }
599
600 params = OSSL_PARAM_BLD_to_param(tmpl);
601
602 /* We export, the provider imports */
603 rv = importer(to_keydata, selection, params);
604
605 err:
606 OSSL_PARAM_BLD_free(tmpl);
607 OSSL_PARAM_free(params);
608 OPENSSL_free(pub_key_buf);
609 OPENSSL_free(gen_buf);
610 BN_CTX_end(bnctx);
611 BN_CTX_free(bnctx);
612 return rv;
613 }
614
ec_pkey_import_from(const OSSL_PARAM params[],void * vpctx)615 static int ec_pkey_import_from(const OSSL_PARAM params[], void *vpctx)
616 {
617 EVP_PKEY_CTX *pctx = vpctx;
618 EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(pctx);
619 EC_KEY *ec = EC_KEY_new_ex(pctx->libctx, pctx->propquery);
620
621 if (ec == NULL) {
622 ERR_raise(ERR_LIB_DH, ERR_R_MALLOC_FAILURE);
623 return 0;
624 }
625
626 if (!ossl_ec_group_fromdata(ec, params)
627 || !ossl_ec_key_otherparams_fromdata(ec, params)
628 || !ossl_ec_key_fromdata(ec, params, 1)
629 || !EVP_PKEY_assign_EC_KEY(pkey, ec)) {
630 EC_KEY_free(ec);
631 return 0;
632 }
633 return 1;
634 }
635
ec_pkey_copy(EVP_PKEY * to,EVP_PKEY * from)636 static int ec_pkey_copy(EVP_PKEY *to, EVP_PKEY *from)
637 {
638 EC_KEY *eckey = from->pkey.ec;
639 EC_KEY *dupkey = NULL;
640 int ret;
641
642 if (eckey != NULL) {
643 dupkey = EC_KEY_dup(eckey);
644 if (dupkey == NULL)
645 return 0;
646 } else {
647 /* necessary to properly copy empty SM2 keys */
648 return EVP_PKEY_set_type(to, from->type);
649 }
650
651 ret = EVP_PKEY_assign_EC_KEY(to, dupkey);
652 if (!ret)
653 EC_KEY_free(dupkey);
654 return ret;
655 }
656
657 const EVP_PKEY_ASN1_METHOD ossl_eckey_asn1_meth = {
658 EVP_PKEY_EC,
659 EVP_PKEY_EC,
660 0,
661 "EC",
662 "OpenSSL EC algorithm",
663
664 eckey_pub_decode,
665 eckey_pub_encode,
666 eckey_pub_cmp,
667 eckey_pub_print,
668
669 NULL,
670 eckey_priv_encode,
671 eckey_priv_print,
672
673 int_ec_size,
674 ec_bits,
675 ec_security_bits,
676
677 eckey_param_decode,
678 eckey_param_encode,
679 ec_missing_parameters,
680 ec_copy_parameters,
681 ec_cmp_parameters,
682 eckey_param_print,
683 0,
684
685 int_ec_free,
686 ec_pkey_ctrl,
687 old_ec_priv_decode,
688 old_ec_priv_encode,
689
690 0, 0, 0,
691
692 ec_pkey_check,
693 ec_pkey_public_check,
694 ec_pkey_param_check,
695
696 0, /* set_priv_key */
697 0, /* set_pub_key */
698 0, /* get_priv_key */
699 0, /* get_pub_key */
700
701 ec_pkey_dirty_cnt,
702 ec_pkey_export_to,
703 ec_pkey_import_from,
704 ec_pkey_copy,
705 eckey_priv_decode_ex
706 };
707
708 #if !defined(OPENSSL_NO_SM2)
709 const EVP_PKEY_ASN1_METHOD ossl_sm2_asn1_meth = {
710 EVP_PKEY_SM2,
711 EVP_PKEY_EC,
712 ASN1_PKEY_ALIAS
713 };
714 #endif
715
EC_KEY_print(BIO * bp,const EC_KEY * x,int off)716 int EC_KEY_print(BIO *bp, const EC_KEY *x, int off)
717 {
718 int private = EC_KEY_get0_private_key(x) != NULL;
719
720 return do_EC_KEY_print(bp, x, off,
721 private ? EC_KEY_PRINT_PRIVATE : EC_KEY_PRINT_PUBLIC);
722 }
723
ECParameters_print(BIO * bp,const EC_KEY * x)724 int ECParameters_print(BIO *bp, const EC_KEY *x)
725 {
726 return do_EC_KEY_print(bp, x, 4, EC_KEY_PRINT_PARAM);
727 }
728