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 ERR_raise(ERR_LIB_EC, EC_R_MISSING_OID);
46 return 0;
47 }
48 *ppval = asn1obj;
49 *pptype = V_ASN1_OBJECT;
50 } else { /* explicit parameters */
51
52 ASN1_STRING *pstr = NULL;
53 pstr = ASN1_STRING_new();
54 if (pstr == NULL)
55 return 0;
56 pstr->length = i2d_ECParameters(ec_key, &pstr->data);
57 if (pstr->length <= 0) {
58 ASN1_STRING_free(pstr);
59 ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB);
60 return 0;
61 }
62 *ppval = pstr;
63 *pptype = V_ASN1_SEQUENCE;
64 }
65 return 1;
66 }
67
eckey_pub_encode(X509_PUBKEY * pk,const EVP_PKEY * pkey)68 static int eckey_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
69 {
70 const EC_KEY *ec_key = pkey->pkey.ec;
71 void *pval = NULL;
72 int ptype;
73 unsigned char *penc = NULL, *p;
74 int penclen;
75
76 if (!eckey_param2type(&ptype, &pval, ec_key)) {
77 ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB);
78 return 0;
79 }
80 penclen = i2o_ECPublicKey(ec_key, NULL);
81 if (penclen <= 0)
82 goto err;
83 penc = OPENSSL_malloc(penclen);
84 if (penc == NULL)
85 goto err;
86 p = penc;
87 penclen = i2o_ECPublicKey(ec_key, &p);
88 if (penclen <= 0)
89 goto err;
90 if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_EC),
91 ptype, pval, penc, penclen))
92 return 1;
93 err:
94 if (ptype == V_ASN1_SEQUENCE)
95 ASN1_STRING_free(pval);
96 OPENSSL_free(penc);
97 return 0;
98 }
99
eckey_pub_decode(EVP_PKEY * pkey,const X509_PUBKEY * pubkey)100 static int eckey_pub_decode(EVP_PKEY *pkey, const X509_PUBKEY *pubkey)
101 {
102 const unsigned char *p = NULL;
103 int pklen;
104 EC_KEY *eckey = NULL;
105 X509_ALGOR *palg;
106 OSSL_LIB_CTX *libctx = NULL;
107 const char *propq = NULL;
108
109 if (!ossl_x509_PUBKEY_get0_libctx(&libctx, &propq, pubkey)
110 || !X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
111 return 0;
112 eckey = ossl_ec_key_param_from_x509_algor(palg, libctx, propq);
113
114 if (!eckey)
115 return 0;
116
117 /* We have parameters now set public key */
118 if (!o2i_ECPublicKey(&eckey, &p, pklen)) {
119 ERR_raise(ERR_LIB_EC, EC_R_DECODE_ERROR);
120 goto ecerr;
121 }
122
123 EVP_PKEY_assign_EC_KEY(pkey, eckey);
124 return 1;
125
126 ecerr:
127 EC_KEY_free(eckey);
128 return 0;
129 }
130
eckey_pub_cmp(const EVP_PKEY * a,const EVP_PKEY * b)131 static int eckey_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
132 {
133 int r;
134 const EC_GROUP *group = EC_KEY_get0_group(b->pkey.ec);
135 const EC_POINT *pa = EC_KEY_get0_public_key(a->pkey.ec),
136 *pb = EC_KEY_get0_public_key(b->pkey.ec);
137
138 if (group == NULL || pa == NULL || pb == NULL)
139 return -2;
140 r = EC_POINT_cmp(group, pa, pb, NULL);
141 if (r == 0)
142 return 1;
143 if (r == 1)
144 return 0;
145 return -2;
146 }
147
eckey_priv_decode_ex(EVP_PKEY * pkey,const PKCS8_PRIV_KEY_INFO * p8,OSSL_LIB_CTX * libctx,const char * propq)148 static int eckey_priv_decode_ex(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8,
149 OSSL_LIB_CTX *libctx, const char *propq)
150 {
151 int ret = 0;
152 EC_KEY *eckey = ossl_ec_key_from_pkcs8(p8, libctx, propq);
153
154 if (eckey != NULL) {
155 ret = 1;
156 EVP_PKEY_assign_EC_KEY(pkey, eckey);
157 }
158
159 return ret;
160 }
161
eckey_priv_encode(PKCS8_PRIV_KEY_INFO * p8,const EVP_PKEY * pkey)162 static int eckey_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
163 {
164 EC_KEY ec_key = *(pkey->pkey.ec);
165 unsigned char *ep = NULL;
166 int eplen, ptype;
167 void *pval;
168 unsigned int old_flags;
169
170 if (!eckey_param2type(&ptype, &pval, &ec_key)) {
171 ERR_raise(ERR_LIB_EC, EC_R_DECODE_ERROR);
172 return 0;
173 }
174
175 /* set the private key */
176
177 /*
178 * do not include the parameters in the SEC1 private key see PKCS#11
179 * 12.11
180 */
181 old_flags = EC_KEY_get_enc_flags(&ec_key);
182 EC_KEY_set_enc_flags(&ec_key, old_flags | EC_PKEY_NO_PARAMETERS);
183
184 eplen = i2d_ECPrivateKey(&ec_key, &ep);
185 if (eplen <= 0) {
186 ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB);
187 goto err;
188 }
189
190 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_X9_62_id_ecPublicKey), 0,
191 ptype, pval, ep, eplen)) {
192 ERR_raise(ERR_LIB_EC, ERR_R_ASN1_LIB);
193 OPENSSL_clear_free(ep, eplen);
194 goto err;
195 }
196
197 return 1;
198
199 err:
200 if (ptype == V_ASN1_SEQUENCE)
201 ASN1_STRING_free(pval);
202 return 0;
203 }
204
int_ec_size(const EVP_PKEY * pkey)205 static int int_ec_size(const EVP_PKEY *pkey)
206 {
207 return ECDSA_size(pkey->pkey.ec);
208 }
209
ec_bits(const EVP_PKEY * pkey)210 static int ec_bits(const EVP_PKEY *pkey)
211 {
212 return EC_GROUP_order_bits(EC_KEY_get0_group(pkey->pkey.ec));
213 }
214
ec_security_bits(const EVP_PKEY * pkey)215 static int ec_security_bits(const EVP_PKEY *pkey)
216 {
217 int ecbits = ec_bits(pkey);
218
219 if (ecbits >= 512)
220 return 256;
221 if (ecbits >= 384)
222 return 192;
223 if (ecbits >= 256)
224 return 128;
225 if (ecbits >= 224)
226 return 112;
227 if (ecbits >= 160)
228 return 80;
229 return ecbits / 2;
230 }
231
ec_missing_parameters(const EVP_PKEY * pkey)232 static int ec_missing_parameters(const EVP_PKEY *pkey)
233 {
234 if (pkey->pkey.ec == NULL || EC_KEY_get0_group(pkey->pkey.ec) == NULL)
235 return 1;
236 return 0;
237 }
238
ec_copy_parameters(EVP_PKEY * to,const EVP_PKEY * from)239 static int ec_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
240 {
241 EC_GROUP *group = EC_GROUP_dup(EC_KEY_get0_group(from->pkey.ec));
242
243 if (group == NULL)
244 return 0;
245 if (to->pkey.ec == NULL) {
246 to->pkey.ec = EC_KEY_new();
247 if (to->pkey.ec == NULL)
248 goto err;
249 }
250 if (EC_KEY_set_group(to->pkey.ec, group) == 0)
251 goto err;
252 EC_GROUP_free(group);
253 return 1;
254 err:
255 EC_GROUP_free(group);
256 return 0;
257 }
258
ec_cmp_parameters(const EVP_PKEY * a,const EVP_PKEY * b)259 static int ec_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
260 {
261 const EC_GROUP *group_a = EC_KEY_get0_group(a->pkey.ec),
262 *group_b = EC_KEY_get0_group(b->pkey.ec);
263
264 if (group_a == NULL || group_b == NULL)
265 return -2;
266 if (EC_GROUP_cmp(group_a, group_b, NULL))
267 return 0;
268 else
269 return 1;
270 }
271
int_ec_free(EVP_PKEY * pkey)272 static void int_ec_free(EVP_PKEY *pkey)
273 {
274 EC_KEY_free(pkey->pkey.ec);
275 }
276
277 typedef enum {
278 EC_KEY_PRINT_PRIVATE,
279 EC_KEY_PRINT_PUBLIC,
280 EC_KEY_PRINT_PARAM
281 } ec_print_t;
282
do_EC_KEY_print(BIO * bp,const EC_KEY * x,int off,ec_print_t ktype)283 static int do_EC_KEY_print(BIO *bp, const EC_KEY *x, int off, ec_print_t ktype)
284 {
285 const char *ecstr;
286 unsigned char *priv = NULL, *pub = NULL;
287 size_t privlen = 0, publen = 0;
288 int ret = 0;
289 const EC_GROUP *group;
290
291 if (x == NULL || (group = EC_KEY_get0_group(x)) == NULL) {
292 ERR_raise(ERR_LIB_EC, ERR_R_PASSED_NULL_PARAMETER);
293 return 0;
294 }
295
296 if (ktype != EC_KEY_PRINT_PARAM && EC_KEY_get0_public_key(x) != NULL) {
297 publen = EC_KEY_key2buf(x, EC_KEY_get_conv_form(x), &pub, NULL);
298 if (publen == 0)
299 goto err;
300 }
301
302 if (ktype == EC_KEY_PRINT_PRIVATE && EC_KEY_get0_private_key(x) != NULL) {
303 privlen = EC_KEY_priv2buf(x, &priv);
304 if (privlen == 0)
305 goto err;
306 }
307
308 if (ktype == EC_KEY_PRINT_PRIVATE)
309 ecstr = "Private-Key";
310 else if (ktype == EC_KEY_PRINT_PUBLIC)
311 ecstr = "Public-Key";
312 else
313 ecstr = "ECDSA-Parameters";
314
315 if (!BIO_indent(bp, off, 128))
316 goto err;
317 if (BIO_printf(bp, "%s: (%d bit)\n", ecstr,
318 EC_GROUP_order_bits(group))
319 <= 0)
320 goto err;
321
322 if (privlen != 0) {
323 if (BIO_printf(bp, "%*spriv:\n", off, "") <= 0)
324 goto err;
325 if (ASN1_buf_print(bp, priv, privlen, off + 4) == 0)
326 goto err;
327 }
328
329 if (publen != 0) {
330 if (BIO_printf(bp, "%*spub:\n", off, "") <= 0)
331 goto err;
332 if (ASN1_buf_print(bp, pub, publen, off + 4) == 0)
333 goto err;
334 }
335
336 if (!ECPKParameters_print(bp, group, off))
337 goto err;
338 ret = 1;
339 err:
340 if (!ret)
341 ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB);
342 OPENSSL_clear_free(priv, privlen);
343 OPENSSL_free(pub);
344 return ret;
345 }
346
eckey_param_decode(EVP_PKEY * pkey,const unsigned char ** pder,int derlen)347 static int eckey_param_decode(EVP_PKEY *pkey,
348 const unsigned char **pder, int derlen)
349 {
350 EC_KEY *eckey;
351
352 if ((eckey = d2i_ECParameters(NULL, pder, derlen)) == NULL)
353 return 0;
354 EVP_PKEY_assign_EC_KEY(pkey, eckey);
355 return 1;
356 }
357
eckey_param_encode(const EVP_PKEY * pkey,unsigned char ** pder)358 static int eckey_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
359 {
360 return i2d_ECParameters(pkey->pkey.ec, pder);
361 }
362
eckey_param_print(BIO * bp,const EVP_PKEY * pkey,int indent,ASN1_PCTX * ctx)363 static int eckey_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
364 ASN1_PCTX *ctx)
365 {
366 return do_EC_KEY_print(bp, pkey->pkey.ec, indent, EC_KEY_PRINT_PARAM);
367 }
368
eckey_pub_print(BIO * bp,const EVP_PKEY * pkey,int indent,ASN1_PCTX * ctx)369 static int eckey_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
370 ASN1_PCTX *ctx)
371 {
372 return do_EC_KEY_print(bp, pkey->pkey.ec, indent, EC_KEY_PRINT_PUBLIC);
373 }
374
eckey_priv_print(BIO * bp,const EVP_PKEY * pkey,int indent,ASN1_PCTX * ctx)375 static int eckey_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
376 ASN1_PCTX *ctx)
377 {
378 return do_EC_KEY_print(bp, pkey->pkey.ec, indent, EC_KEY_PRINT_PRIVATE);
379 }
380
old_ec_priv_decode(EVP_PKEY * pkey,const unsigned char ** pder,int derlen)381 static int old_ec_priv_decode(EVP_PKEY *pkey,
382 const unsigned char **pder, int derlen)
383 {
384 EC_KEY *ec;
385
386 if ((ec = d2i_ECPrivateKey(NULL, pder, derlen)) == NULL)
387 return 0;
388 EVP_PKEY_assign_EC_KEY(pkey, ec);
389 return 1;
390 }
391
old_ec_priv_encode(const EVP_PKEY * pkey,unsigned char ** pder)392 static int old_ec_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
393 {
394 return i2d_ECPrivateKey(pkey->pkey.ec, pder);
395 }
396
ec_pkey_ctrl(EVP_PKEY * pkey,int op,long arg1,void * arg2)397 static int ec_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
398 {
399 switch (op) {
400 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
401 if (EVP_PKEY_get_id(pkey) == EVP_PKEY_SM2) {
402 /* For SM2, the only valid digest-alg is SM3 */
403 *(int *)arg2 = NID_sm3;
404 return 2; /* Make it mandatory */
405 }
406 *(int *)arg2 = NID_sha256;
407 return 1;
408
409 case ASN1_PKEY_CTRL_SET1_TLS_ENCPT:
410 /* We should only be here if we have a legacy key */
411 if (!ossl_assert(evp_pkey_is_legacy(pkey)))
412 return 0;
413 return EC_KEY_oct2key(evp_pkey_get0_EC_KEY_int(pkey), arg2, arg1, NULL);
414
415 case ASN1_PKEY_CTRL_GET1_TLS_ENCPT:
416 return EC_KEY_key2buf(EVP_PKEY_get0_EC_KEY(pkey),
417 POINT_CONVERSION_UNCOMPRESSED, arg2, NULL);
418
419 default:
420 return -2;
421 }
422 }
423
ec_pkey_check(const EVP_PKEY * pkey)424 static int ec_pkey_check(const EVP_PKEY *pkey)
425 {
426 EC_KEY *eckey = pkey->pkey.ec;
427
428 /* stay consistent to what EVP_PKEY_check demands */
429 if (eckey->priv_key == NULL) {
430 ERR_raise(ERR_LIB_EC, EC_R_MISSING_PRIVATE_KEY);
431 return 0;
432 }
433
434 return EC_KEY_check_key(eckey);
435 }
436
ec_pkey_public_check(const EVP_PKEY * pkey)437 static int ec_pkey_public_check(const EVP_PKEY *pkey)
438 {
439 EC_KEY *eckey = pkey->pkey.ec;
440
441 /*
442 * Note: it unnecessary to check eckey->pub_key here since
443 * it will be checked in EC_KEY_check_key(). In fact, the
444 * EC_KEY_check_key() mainly checks the public key, and checks
445 * the private key optionally (only if there is one). So if
446 * someone passes a whole EC key (public + private), this
447 * will also work...
448 */
449
450 return EC_KEY_check_key(eckey);
451 }
452
ec_pkey_param_check(const EVP_PKEY * pkey)453 static int ec_pkey_param_check(const EVP_PKEY *pkey)
454 {
455 EC_KEY *eckey = pkey->pkey.ec;
456
457 /* stay consistent to what EVP_PKEY_check demands */
458 if (eckey->group == NULL) {
459 ERR_raise(ERR_LIB_EC, EC_R_MISSING_PARAMETERS);
460 return 0;
461 }
462
463 return EC_GROUP_check(eckey->group, NULL);
464 }
465
ec_pkey_dirty_cnt(const EVP_PKEY * pkey)466 static size_t ec_pkey_dirty_cnt(const EVP_PKEY *pkey)
467 {
468 return pkey->pkey.ec->dirty_cnt;
469 }
470
ec_pkey_export_to(const EVP_PKEY * from,void * to_keydata,OSSL_FUNC_keymgmt_import_fn * importer,OSSL_LIB_CTX * libctx,const char * propq)471 static int ec_pkey_export_to(const EVP_PKEY *from, void *to_keydata,
472 OSSL_FUNC_keymgmt_import_fn *importer,
473 OSSL_LIB_CTX *libctx, const char *propq)
474 {
475 const EC_KEY *eckey = NULL;
476 const EC_GROUP *ecg = NULL;
477 unsigned char *pub_key_buf = NULL, *gen_buf = NULL;
478 size_t pub_key_buflen;
479 OSSL_PARAM_BLD *tmpl;
480 OSSL_PARAM *params = NULL;
481 const BIGNUM *priv_key = NULL;
482 const EC_POINT *pub_point = NULL;
483 int selection = 0;
484 int rv = 0;
485 BN_CTX *bnctx = NULL;
486
487 if (from == NULL
488 || (eckey = from->pkey.ec) == NULL
489 || (ecg = EC_KEY_get0_group(eckey)) == NULL)
490 return 0;
491
492 tmpl = OSSL_PARAM_BLD_new();
493 if (tmpl == NULL)
494 return 0;
495
496 /*
497 * EC_POINT_point2buf() can generate random numbers in some
498 * implementations so we need to ensure we use the correct libctx.
499 */
500 bnctx = BN_CTX_new_ex(libctx);
501 if (bnctx == NULL)
502 goto err;
503 BN_CTX_start(bnctx);
504
505 /* export the domain parameters */
506 if (!ossl_ec_group_todata(ecg, tmpl, NULL, libctx, propq, bnctx, &gen_buf))
507 goto err;
508 selection |= OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS;
509
510 priv_key = EC_KEY_get0_private_key(eckey);
511 pub_point = EC_KEY_get0_public_key(eckey);
512
513 if (pub_point != NULL) {
514 /* convert pub_point to a octet string according to the SECG standard */
515 point_conversion_form_t format = EC_KEY_get_conv_form(eckey);
516
517 if ((pub_key_buflen = EC_POINT_point2buf(ecg, pub_point,
518 format,
519 &pub_key_buf, bnctx))
520 == 0
521 || !OSSL_PARAM_BLD_push_octet_string(tmpl,
522 OSSL_PKEY_PARAM_PUB_KEY,
523 pub_key_buf,
524 pub_key_buflen))
525 goto err;
526 selection |= OSSL_KEYMGMT_SELECT_PUBLIC_KEY;
527 }
528
529 if (priv_key != NULL) {
530 size_t sz;
531 int ecbits;
532 int ecdh_cofactor_mode;
533
534 /*
535 * Key import/export should never leak the bit length of the secret
536 * scalar in the key.
537 *
538 * For this reason, on export we use padded BIGNUMs with fixed length.
539 *
540 * When importing we also should make sure that, even if short lived,
541 * the newly created BIGNUM is marked with the BN_FLG_CONSTTIME flag as
542 * soon as possible, so that any processing of this BIGNUM might opt for
543 * constant time implementations in the backend.
544 *
545 * Setting the BN_FLG_CONSTTIME flag alone is never enough, we also have
546 * to preallocate the BIGNUM internal buffer to a fixed public size big
547 * enough that operations performed during the processing never trigger
548 * a realloc which would leak the size of the scalar through memory
549 * accesses.
550 *
551 * Fixed Length
552 * ------------
553 *
554 * The order of the large prime subgroup of the curve is our choice for
555 * a fixed public size, as that is generally the upper bound for
556 * generating a private key in EC cryptosystems and should fit all valid
557 * secret scalars.
558 *
559 * For padding on export we just use the bit length of the order
560 * converted to bytes (rounding up).
561 *
562 * For preallocating the BIGNUM storage we look at the number of "words"
563 * required for the internal representation of the order, and we
564 * preallocate 2 extra "words" in case any of the subsequent processing
565 * might temporarily overflow the order length.
566 */
567 ecbits = EC_GROUP_order_bits(ecg);
568 if (ecbits <= 0)
569 goto err;
570
571 sz = (ecbits + 7) / 8;
572 if (!OSSL_PARAM_BLD_push_BN_pad(tmpl,
573 OSSL_PKEY_PARAM_PRIV_KEY,
574 priv_key, sz))
575 goto err;
576 selection |= OSSL_KEYMGMT_SELECT_PRIVATE_KEY;
577
578 /*
579 * The ECDH Cofactor Mode is defined only if the EC_KEY actually
580 * contains a private key, so we check for the flag and export it only
581 * in this case.
582 */
583 ecdh_cofactor_mode = (EC_KEY_get_flags(eckey) & EC_FLAG_COFACTOR_ECDH) ? 1 : 0;
584
585 /* Export the ECDH_COFACTOR_MODE parameter */
586 if (!OSSL_PARAM_BLD_push_int(tmpl,
587 OSSL_PKEY_PARAM_USE_COFACTOR_ECDH,
588 ecdh_cofactor_mode))
589 goto err;
590 selection |= OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS;
591 }
592
593 params = OSSL_PARAM_BLD_to_param(tmpl);
594
595 /* We export, the provider imports */
596 rv = importer(to_keydata, selection, params);
597
598 err:
599 OSSL_PARAM_BLD_free(tmpl);
600 OSSL_PARAM_free(params);
601 OPENSSL_free(pub_key_buf);
602 OPENSSL_free(gen_buf);
603 BN_CTX_end(bnctx);
604 BN_CTX_free(bnctx);
605 return rv;
606 }
607
ec_pkey_import_from(const OSSL_PARAM params[],void * vpctx)608 static int ec_pkey_import_from(const OSSL_PARAM params[], void *vpctx)
609 {
610 EVP_PKEY_CTX *pctx = vpctx;
611 EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(pctx);
612 EC_KEY *ec = EC_KEY_new_ex(pctx->libctx, pctx->propquery);
613
614 if (ec == NULL) {
615 ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB);
616 return 0;
617 }
618
619 if (!ossl_ec_group_fromdata(ec, params)
620 || !ossl_ec_key_otherparams_fromdata(ec, params)
621 || !ossl_ec_key_fromdata(ec, params, 1)
622 || !EVP_PKEY_assign_EC_KEY(pkey, ec)) {
623 EC_KEY_free(ec);
624 return 0;
625 }
626 return 1;
627 }
628
ec_pkey_copy(EVP_PKEY * to,EVP_PKEY * from)629 static int ec_pkey_copy(EVP_PKEY *to, EVP_PKEY *from)
630 {
631 EC_KEY *eckey = from->pkey.ec;
632 EC_KEY *dupkey = NULL;
633 int ret;
634
635 if (eckey != NULL) {
636 dupkey = EC_KEY_dup(eckey);
637 if (dupkey == NULL)
638 return 0;
639 } else {
640 /* necessary to properly copy empty SM2 keys */
641 return EVP_PKEY_set_type(to, from->type);
642 }
643
644 ret = EVP_PKEY_assign_EC_KEY(to, dupkey);
645 if (!ret)
646 EC_KEY_free(dupkey);
647 return ret;
648 }
649
650 const EVP_PKEY_ASN1_METHOD ossl_eckey_asn1_meth = {
651 EVP_PKEY_EC,
652 EVP_PKEY_EC,
653 0,
654 "EC",
655 "OpenSSL EC algorithm",
656
657 eckey_pub_decode,
658 eckey_pub_encode,
659 eckey_pub_cmp,
660 eckey_pub_print,
661
662 NULL,
663 eckey_priv_encode,
664 eckey_priv_print,
665
666 int_ec_size,
667 ec_bits,
668 ec_security_bits,
669
670 eckey_param_decode,
671 eckey_param_encode,
672 ec_missing_parameters,
673 ec_copy_parameters,
674 ec_cmp_parameters,
675 eckey_param_print,
676 0,
677
678 int_ec_free,
679 ec_pkey_ctrl,
680 old_ec_priv_decode,
681 old_ec_priv_encode,
682
683 0, 0, 0,
684
685 ec_pkey_check,
686 ec_pkey_public_check,
687 ec_pkey_param_check,
688
689 0, /* set_priv_key */
690 0, /* set_pub_key */
691 0, /* get_priv_key */
692 0, /* get_pub_key */
693
694 ec_pkey_dirty_cnt,
695 ec_pkey_export_to,
696 ec_pkey_import_from,
697 ec_pkey_copy,
698 eckey_priv_decode_ex
699 };
700
701 #if !defined(OPENSSL_NO_SM2)
702 const EVP_PKEY_ASN1_METHOD ossl_sm2_asn1_meth = {
703 EVP_PKEY_SM2,
704 EVP_PKEY_EC,
705 ASN1_PKEY_ALIAS
706 };
707 #endif
708
EC_KEY_print(BIO * bp,const EC_KEY * x,int off)709 int EC_KEY_print(BIO *bp, const EC_KEY *x, int off)
710 {
711 int private = EC_KEY_get0_private_key(x) != NULL;
712
713 return do_EC_KEY_print(bp, x, off,
714 private ? EC_KEY_PRINT_PRIVATE : EC_KEY_PRINT_PUBLIC);
715 }
716
ECParameters_print(BIO * bp,const EC_KEY * x)717 int ECParameters_print(BIO *bp, const EC_KEY *x)
718 {
719 return do_EC_KEY_print(bp, x, 4, EC_KEY_PRINT_PARAM);
720 }
721