1 /*
2 * Copyright 2006-2022 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)) <= 0)
319 goto err;
320
321 if (privlen != 0) {
322 if (BIO_printf(bp, "%*spriv:\n", off, "") <= 0)
323 goto err;
324 if (ASN1_buf_print(bp, priv, privlen, off + 4) == 0)
325 goto err;
326 }
327
328 if (publen != 0) {
329 if (BIO_printf(bp, "%*spub:\n", off, "") <= 0)
330 goto err;
331 if (ASN1_buf_print(bp, pub, publen, off + 4) == 0)
332 goto err;
333 }
334
335 if (!ECPKParameters_print(bp, group, off))
336 goto err;
337 ret = 1;
338 err:
339 if (!ret)
340 ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB);
341 OPENSSL_clear_free(priv, privlen);
342 OPENSSL_free(pub);
343 return ret;
344 }
345
eckey_param_decode(EVP_PKEY * pkey,const unsigned char ** pder,int derlen)346 static int eckey_param_decode(EVP_PKEY *pkey,
347 const unsigned char **pder, int derlen)
348 {
349 EC_KEY *eckey;
350
351 if ((eckey = d2i_ECParameters(NULL, pder, derlen)) == NULL)
352 return 0;
353 EVP_PKEY_assign_EC_KEY(pkey, eckey);
354 return 1;
355 }
356
eckey_param_encode(const EVP_PKEY * pkey,unsigned char ** pder)357 static int eckey_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
358 {
359 return i2d_ECParameters(pkey->pkey.ec, pder);
360 }
361
eckey_param_print(BIO * bp,const EVP_PKEY * pkey,int indent,ASN1_PCTX * ctx)362 static int eckey_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
363 ASN1_PCTX *ctx)
364 {
365 return do_EC_KEY_print(bp, pkey->pkey.ec, indent, EC_KEY_PRINT_PARAM);
366 }
367
eckey_pub_print(BIO * bp,const EVP_PKEY * pkey,int indent,ASN1_PCTX * ctx)368 static int eckey_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
369 ASN1_PCTX *ctx)
370 {
371 return do_EC_KEY_print(bp, pkey->pkey.ec, indent, EC_KEY_PRINT_PUBLIC);
372 }
373
eckey_priv_print(BIO * bp,const EVP_PKEY * pkey,int indent,ASN1_PCTX * ctx)374 static int eckey_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
375 ASN1_PCTX *ctx)
376 {
377 return do_EC_KEY_print(bp, pkey->pkey.ec, indent, EC_KEY_PRINT_PRIVATE);
378 }
379
old_ec_priv_decode(EVP_PKEY * pkey,const unsigned char ** pder,int derlen)380 static int old_ec_priv_decode(EVP_PKEY *pkey,
381 const unsigned char **pder, int derlen)
382 {
383 EC_KEY *ec;
384
385 if ((ec = d2i_ECPrivateKey(NULL, pder, derlen)) == NULL)
386 return 0;
387 EVP_PKEY_assign_EC_KEY(pkey, ec);
388 return 1;
389 }
390
old_ec_priv_encode(const EVP_PKEY * pkey,unsigned char ** pder)391 static int old_ec_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
392 {
393 return i2d_ECPrivateKey(pkey->pkey.ec, pder);
394 }
395
ec_pkey_ctrl(EVP_PKEY * pkey,int op,long arg1,void * arg2)396 static int ec_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
397 {
398 switch (op) {
399 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
400 if (EVP_PKEY_get_id(pkey) == EVP_PKEY_SM2) {
401 /* For SM2, the only valid digest-alg is SM3 */
402 *(int *)arg2 = NID_sm3;
403 return 2; /* Make it mandatory */
404 }
405 *(int *)arg2 = NID_sha256;
406 return 1;
407
408 case ASN1_PKEY_CTRL_SET1_TLS_ENCPT:
409 /* We should only be here if we have a legacy key */
410 if (!ossl_assert(evp_pkey_is_legacy(pkey)))
411 return 0;
412 return EC_KEY_oct2key(evp_pkey_get0_EC_KEY_int(pkey), arg2, arg1, NULL);
413
414 case ASN1_PKEY_CTRL_GET1_TLS_ENCPT:
415 return EC_KEY_key2buf(EVP_PKEY_get0_EC_KEY(pkey),
416 POINT_CONVERSION_UNCOMPRESSED, arg2, NULL);
417
418 default:
419 return -2;
420 }
421 }
422
ec_pkey_check(const EVP_PKEY * pkey)423 static int ec_pkey_check(const EVP_PKEY *pkey)
424 {
425 EC_KEY *eckey = pkey->pkey.ec;
426
427 /* stay consistent to what EVP_PKEY_check demands */
428 if (eckey->priv_key == NULL) {
429 ERR_raise(ERR_LIB_EC, EC_R_MISSING_PRIVATE_KEY);
430 return 0;
431 }
432
433 return EC_KEY_check_key(eckey);
434 }
435
ec_pkey_public_check(const EVP_PKEY * pkey)436 static int ec_pkey_public_check(const EVP_PKEY *pkey)
437 {
438 EC_KEY *eckey = pkey->pkey.ec;
439
440 /*
441 * Note: it unnecessary to check eckey->pub_key here since
442 * it will be checked in EC_KEY_check_key(). In fact, the
443 * EC_KEY_check_key() mainly checks the public key, and checks
444 * the private key optionally (only if there is one). So if
445 * someone passes a whole EC key (public + private), this
446 * will also work...
447 */
448
449 return EC_KEY_check_key(eckey);
450 }
451
ec_pkey_param_check(const EVP_PKEY * pkey)452 static int ec_pkey_param_check(const EVP_PKEY *pkey)
453 {
454 EC_KEY *eckey = pkey->pkey.ec;
455
456 /* stay consistent to what EVP_PKEY_check demands */
457 if (eckey->group == NULL) {
458 ERR_raise(ERR_LIB_EC, EC_R_MISSING_PARAMETERS);
459 return 0;
460 }
461
462 return EC_GROUP_check(eckey->group, NULL);
463 }
464
465 static
ec_pkey_dirty_cnt(const EVP_PKEY * pkey)466 size_t ec_pkey_dirty_cnt(const EVP_PKEY *pkey)
467 {
468 return pkey->pkey.ec->dirty_cnt;
469 }
470
471 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)472 int ec_pkey_export_to(const EVP_PKEY *from, void *to_keydata,
473 OSSL_FUNC_keymgmt_import_fn *importer,
474 OSSL_LIB_CTX *libctx, const char *propq)
475 {
476 const EC_KEY *eckey = NULL;
477 const EC_GROUP *ecg = NULL;
478 unsigned char *pub_key_buf = NULL, *gen_buf = NULL;
479 size_t pub_key_buflen;
480 OSSL_PARAM_BLD *tmpl;
481 OSSL_PARAM *params = NULL;
482 const BIGNUM *priv_key = NULL;
483 const EC_POINT *pub_point = NULL;
484 int selection = 0;
485 int rv = 0;
486 BN_CTX *bnctx = NULL;
487
488 if (from == NULL
489 || (eckey = from->pkey.ec) == NULL
490 || (ecg = EC_KEY_get0_group(eckey)) == NULL)
491 return 0;
492
493 tmpl = OSSL_PARAM_BLD_new();
494 if (tmpl == NULL)
495 return 0;
496
497 /*
498 * EC_POINT_point2buf() can generate random numbers in some
499 * implementations so we need to ensure we use the correct libctx.
500 */
501 bnctx = BN_CTX_new_ex(libctx);
502 if (bnctx == NULL)
503 goto err;
504 BN_CTX_start(bnctx);
505
506 /* export the domain parameters */
507 if (!ossl_ec_group_todata(ecg, tmpl, NULL, libctx, propq, bnctx, &gen_buf))
508 goto err;
509 selection |= OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS;
510
511 priv_key = EC_KEY_get0_private_key(eckey);
512 pub_point = EC_KEY_get0_public_key(eckey);
513
514 if (pub_point != NULL) {
515 /* convert pub_point to a octet string according to the SECG standard */
516 if ((pub_key_buflen = EC_POINT_point2buf(ecg, pub_point,
517 POINT_CONVERSION_COMPRESSED,
518 &pub_key_buf, bnctx)) == 0
519 || !OSSL_PARAM_BLD_push_octet_string(tmpl,
520 OSSL_PKEY_PARAM_PUB_KEY,
521 pub_key_buf,
522 pub_key_buflen))
523 goto err;
524 selection |= OSSL_KEYMGMT_SELECT_PUBLIC_KEY;
525 }
526
527 if (priv_key != NULL) {
528 size_t sz;
529 int ecbits;
530 int ecdh_cofactor_mode;
531
532 /*
533 * Key import/export should never leak the bit length of the secret
534 * scalar in the key.
535 *
536 * For this reason, on export we use padded BIGNUMs with fixed length.
537 *
538 * When importing we also should make sure that, even if short lived,
539 * the newly created BIGNUM is marked with the BN_FLG_CONSTTIME flag as
540 * soon as possible, so that any processing of this BIGNUM might opt for
541 * constant time implementations in the backend.
542 *
543 * Setting the BN_FLG_CONSTTIME flag alone is never enough, we also have
544 * to preallocate the BIGNUM internal buffer to a fixed public size big
545 * enough that operations performed during the processing never trigger
546 * a realloc which would leak the size of the scalar through memory
547 * accesses.
548 *
549 * Fixed Length
550 * ------------
551 *
552 * The order of the large prime subgroup of the curve is our choice for
553 * a fixed public size, as that is generally the upper bound for
554 * generating a private key in EC cryptosystems and should fit all valid
555 * secret scalars.
556 *
557 * For padding on export we just use the bit length of the order
558 * converted to bytes (rounding up).
559 *
560 * For preallocating the BIGNUM storage we look at the number of "words"
561 * required for the internal representation of the order, and we
562 * preallocate 2 extra "words" in case any of the subsequent processing
563 * might temporarily overflow the order length.
564 */
565 ecbits = EC_GROUP_order_bits(ecg);
566 if (ecbits <= 0)
567 goto err;
568
569 sz = (ecbits + 7 ) / 8;
570 if (!OSSL_PARAM_BLD_push_BN_pad(tmpl,
571 OSSL_PKEY_PARAM_PRIV_KEY,
572 priv_key, sz))
573 goto err;
574 selection |= OSSL_KEYMGMT_SELECT_PRIVATE_KEY;
575
576 /*
577 * The ECDH Cofactor Mode is defined only if the EC_KEY actually
578 * contains a private key, so we check for the flag and export it only
579 * in this case.
580 */
581 ecdh_cofactor_mode =
582 (EC_KEY_get_flags(eckey) & EC_FLAG_COFACTOR_ECDH) ? 1 : 0;
583
584 /* Export the ECDH_COFACTOR_MODE parameter */
585 if (!OSSL_PARAM_BLD_push_int(tmpl,
586 OSSL_PKEY_PARAM_USE_COFACTOR_ECDH,
587 ecdh_cofactor_mode))
588 goto err;
589 selection |= OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS;
590 }
591
592 params = OSSL_PARAM_BLD_to_param(tmpl);
593
594 /* We export, the provider imports */
595 rv = importer(to_keydata, selection, params);
596
597 err:
598 OSSL_PARAM_BLD_free(tmpl);
599 OSSL_PARAM_free(params);
600 OPENSSL_free(pub_key_buf);
601 OPENSSL_free(gen_buf);
602 BN_CTX_end(bnctx);
603 BN_CTX_free(bnctx);
604 return rv;
605 }
606
ec_pkey_import_from(const OSSL_PARAM params[],void * vpctx)607 static int ec_pkey_import_from(const OSSL_PARAM params[], void *vpctx)
608 {
609 EVP_PKEY_CTX *pctx = vpctx;
610 EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(pctx);
611 EC_KEY *ec = EC_KEY_new_ex(pctx->libctx, pctx->propquery);
612
613 if (ec == NULL) {
614 ERR_raise(ERR_LIB_DH, ERR_R_MALLOC_FAILURE);
615 return 0;
616 }
617
618 if (!ossl_ec_group_fromdata(ec, params)
619 || !ossl_ec_key_otherparams_fromdata(ec, params)
620 || !ossl_ec_key_fromdata(ec, params, 1)
621 || !EVP_PKEY_assign_EC_KEY(pkey, ec)) {
622 EC_KEY_free(ec);
623 return 0;
624 }
625 return 1;
626 }
627
ec_pkey_copy(EVP_PKEY * to,EVP_PKEY * from)628 static int ec_pkey_copy(EVP_PKEY *to, EVP_PKEY *from)
629 {
630 EC_KEY *eckey = from->pkey.ec;
631 EC_KEY *dupkey = NULL;
632 int ret;
633
634 if (eckey != NULL) {
635 dupkey = EC_KEY_dup(eckey);
636 if (dupkey == NULL)
637 return 0;
638 } else {
639 /* necessary to properly copy empty SM2 keys */
640 return EVP_PKEY_set_type(to, from->type);
641 }
642
643 ret = EVP_PKEY_assign_EC_KEY(to, dupkey);
644 if (!ret)
645 EC_KEY_free(dupkey);
646 return ret;
647 }
648
649 const EVP_PKEY_ASN1_METHOD ossl_eckey_asn1_meth = {
650 EVP_PKEY_EC,
651 EVP_PKEY_EC,
652 0,
653 "EC",
654 "OpenSSL EC algorithm",
655
656 eckey_pub_decode,
657 eckey_pub_encode,
658 eckey_pub_cmp,
659 eckey_pub_print,
660
661 NULL,
662 eckey_priv_encode,
663 eckey_priv_print,
664
665 int_ec_size,
666 ec_bits,
667 ec_security_bits,
668
669 eckey_param_decode,
670 eckey_param_encode,
671 ec_missing_parameters,
672 ec_copy_parameters,
673 ec_cmp_parameters,
674 eckey_param_print,
675 0,
676
677 int_ec_free,
678 ec_pkey_ctrl,
679 old_ec_priv_decode,
680 old_ec_priv_encode,
681
682 0, 0, 0,
683
684 ec_pkey_check,
685 ec_pkey_public_check,
686 ec_pkey_param_check,
687
688 0, /* set_priv_key */
689 0, /* set_pub_key */
690 0, /* get_priv_key */
691 0, /* get_pub_key */
692
693 ec_pkey_dirty_cnt,
694 ec_pkey_export_to,
695 ec_pkey_import_from,
696 ec_pkey_copy,
697 eckey_priv_decode_ex
698 };
699
700 #if !defined(OPENSSL_NO_SM2)
701 const EVP_PKEY_ASN1_METHOD ossl_sm2_asn1_meth = {
702 EVP_PKEY_SM2,
703 EVP_PKEY_EC,
704 ASN1_PKEY_ALIAS
705 };
706 #endif
707
EC_KEY_print(BIO * bp,const EC_KEY * x,int off)708 int EC_KEY_print(BIO *bp, const EC_KEY *x, int off)
709 {
710 int private = EC_KEY_get0_private_key(x) != NULL;
711
712 return do_EC_KEY_print(bp, x, off,
713 private ? EC_KEY_PRINT_PRIVATE : EC_KEY_PRINT_PUBLIC);
714 }
715
ECParameters_print(BIO * bp,const EC_KEY * x)716 int ECParameters_print(BIO *bp, const EC_KEY *x)
717 {
718 return do_EC_KEY_print(bp, x, 4, EC_KEY_PRINT_PARAM);
719 }
720