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[thirdparty/openssl.git] / crypto / evp / p_lib.c
1 /*
2 * Copyright 1995-2018 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 #include <stdio.h>
11 #include "internal/cryptlib.h"
12 #include "internal/refcount.h"
13 #include <openssl/bn.h>
14 #include <openssl/err.h>
15 #include <openssl/objects.h>
16 #include <openssl/evp.h>
17 #include <openssl/x509.h>
18 #include <openssl/rsa.h>
19 #include <openssl/dsa.h>
20 #include <openssl/dh.h>
21 #include <openssl/cmac.h>
22 #include <openssl/engine.h>
23
24 #include "internal/asn1_int.h"
25 #include "internal/evp_int.h"
26
27 static void EVP_PKEY_free_it(EVP_PKEY *x);
28
29 int EVP_PKEY_bits(const EVP_PKEY *pkey)
30 {
31 if (pkey && pkey->ameth && pkey->ameth->pkey_bits)
32 return pkey->ameth->pkey_bits(pkey);
33 return 0;
34 }
35
36 int EVP_PKEY_security_bits(const EVP_PKEY *pkey)
37 {
38 if (pkey == NULL)
39 return 0;
40 if (!pkey->ameth || !pkey->ameth->pkey_security_bits)
41 return -2;
42 return pkey->ameth->pkey_security_bits(pkey);
43 }
44
45 int EVP_PKEY_size(EVP_PKEY *pkey)
46 {
47 if (pkey && pkey->ameth && pkey->ameth->pkey_size)
48 return pkey->ameth->pkey_size(pkey);
49 return 0;
50 }
51
52 int EVP_PKEY_save_parameters(EVP_PKEY *pkey, int mode)
53 {
54 #ifndef OPENSSL_NO_DSA
55 if (pkey->type == EVP_PKEY_DSA) {
56 int ret = pkey->save_parameters;
57
58 if (mode >= 0)
59 pkey->save_parameters = mode;
60 return ret;
61 }
62 #endif
63 #ifndef OPENSSL_NO_EC
64 if (pkey->type == EVP_PKEY_EC) {
65 int ret = pkey->save_parameters;
66
67 if (mode >= 0)
68 pkey->save_parameters = mode;
69 return ret;
70 }
71 #endif
72 return 0;
73 }
74
75 int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
76 {
77 if (to->type == EVP_PKEY_NONE) {
78 if (EVP_PKEY_set_type(to, from->type) == 0)
79 return 0;
80 } else if (to->type != from->type) {
81 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_DIFFERENT_KEY_TYPES);
82 goto err;
83 }
84
85 if (EVP_PKEY_missing_parameters(from)) {
86 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_MISSING_PARAMETERS);
87 goto err;
88 }
89
90 if (!EVP_PKEY_missing_parameters(to)) {
91 if (EVP_PKEY_cmp_parameters(to, from) == 1)
92 return 1;
93 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_DIFFERENT_PARAMETERS);
94 return 0;
95 }
96
97 if (from->ameth && from->ameth->param_copy)
98 return from->ameth->param_copy(to, from);
99 err:
100 return 0;
101 }
102
103 int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey)
104 {
105 if (pkey->ameth && pkey->ameth->param_missing)
106 return pkey->ameth->param_missing(pkey);
107 return 0;
108 }
109
110 int EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
111 {
112 if (a->type != b->type)
113 return -1;
114 if (a->ameth && a->ameth->param_cmp)
115 return a->ameth->param_cmp(a, b);
116 return -2;
117 }
118
119 int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
120 {
121 if (a->type != b->type)
122 return -1;
123
124 if (a->ameth) {
125 int ret;
126 /* Compare parameters if the algorithm has them */
127 if (a->ameth->param_cmp) {
128 ret = a->ameth->param_cmp(a, b);
129 if (ret <= 0)
130 return ret;
131 }
132
133 if (a->ameth->pub_cmp)
134 return a->ameth->pub_cmp(a, b);
135 }
136
137 return -2;
138 }
139
140 EVP_PKEY *EVP_PKEY_new(void)
141 {
142 EVP_PKEY *ret = OPENSSL_zalloc(sizeof(*ret));
143
144 if (ret == NULL) {
145 EVPerr(EVP_F_EVP_PKEY_NEW, ERR_R_MALLOC_FAILURE);
146 return NULL;
147 }
148 ret->type = EVP_PKEY_NONE;
149 ret->save_type = EVP_PKEY_NONE;
150 ret->references = 1;
151 ret->save_parameters = 1;
152 ret->lock = CRYPTO_THREAD_lock_new();
153 if (ret->lock == NULL) {
154 EVPerr(EVP_F_EVP_PKEY_NEW, ERR_R_MALLOC_FAILURE);
155 OPENSSL_free(ret);
156 return NULL;
157 }
158 return ret;
159 }
160
161 int EVP_PKEY_up_ref(EVP_PKEY *pkey)
162 {
163 int i;
164
165 if (CRYPTO_UP_REF(&pkey->references, &i, pkey->lock) <= 0)
166 return 0;
167
168 REF_PRINT_COUNT("EVP_PKEY", pkey);
169 REF_ASSERT_ISNT(i < 2);
170 return ((i > 1) ? 1 : 0);
171 }
172
173 /*
174 * Setup a public key ASN1 method and ENGINE from a NID or a string. If pkey
175 * is NULL just return 1 or 0 if the algorithm exists.
176 */
177
178 static int pkey_set_type(EVP_PKEY *pkey, ENGINE *e, int type, const char *str,
179 int len)
180 {
181 const EVP_PKEY_ASN1_METHOD *ameth;
182 ENGINE **eptr = (e == NULL) ? &e : NULL;
183
184 if (pkey) {
185 if (pkey->pkey.ptr)
186 EVP_PKEY_free_it(pkey);
187 /*
188 * If key type matches and a method exists then this lookup has
189 * succeeded once so just indicate success.
190 */
191 if ((type == pkey->save_type) && pkey->ameth)
192 return 1;
193 #ifndef OPENSSL_NO_ENGINE
194 /* If we have ENGINEs release them */
195 ENGINE_finish(pkey->engine);
196 pkey->engine = NULL;
197 ENGINE_finish(pkey->pmeth_engine);
198 pkey->pmeth_engine = NULL;
199 #endif
200 }
201 if (str)
202 ameth = EVP_PKEY_asn1_find_str(eptr, str, len);
203 else
204 ameth = EVP_PKEY_asn1_find(eptr, type);
205 #ifndef OPENSSL_NO_ENGINE
206 if (pkey == NULL && eptr != NULL)
207 ENGINE_finish(e);
208 #endif
209 if (ameth == NULL) {
210 EVPerr(EVP_F_PKEY_SET_TYPE, EVP_R_UNSUPPORTED_ALGORITHM);
211 return 0;
212 }
213 if (pkey) {
214 pkey->ameth = ameth;
215 pkey->engine = e;
216
217 pkey->type = pkey->ameth->pkey_id;
218 pkey->save_type = type;
219 }
220 return 1;
221 }
222
223 EVP_PKEY *EVP_PKEY_new_raw_private_key(int type, ENGINE *e,
224 const unsigned char *priv,
225 size_t len)
226 {
227 EVP_PKEY *ret = EVP_PKEY_new();
228
229 if (ret == NULL
230 || !pkey_set_type(ret, e, type, NULL, -1)) {
231 /* EVPerr already called */
232 goto err;
233 }
234
235 if (ret->ameth->set_priv_key == NULL) {
236 EVPerr(EVP_F_EVP_PKEY_NEW_RAW_PRIVATE_KEY,
237 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
238 goto err;
239 }
240
241 if (!ret->ameth->set_priv_key(ret, priv, len)) {
242 EVPerr(EVP_F_EVP_PKEY_NEW_RAW_PRIVATE_KEY, EVP_R_KEY_SETUP_FAILED);
243 goto err;
244 }
245
246 return ret;
247
248 err:
249 EVP_PKEY_free(ret);
250 return NULL;
251 }
252
253 EVP_PKEY *EVP_PKEY_new_raw_public_key(int type, ENGINE *e,
254 const unsigned char *pub,
255 size_t len)
256 {
257 EVP_PKEY *ret = EVP_PKEY_new();
258
259 if (ret == NULL
260 || !pkey_set_type(ret, e, type, NULL, -1)) {
261 /* EVPerr already called */
262 goto err;
263 }
264
265 if (ret->ameth->set_pub_key == NULL) {
266 EVPerr(EVP_F_EVP_PKEY_NEW_RAW_PUBLIC_KEY,
267 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
268 goto err;
269 }
270
271 if (!ret->ameth->set_pub_key(ret, pub, len)) {
272 EVPerr(EVP_F_EVP_PKEY_NEW_RAW_PUBLIC_KEY, EVP_R_KEY_SETUP_FAILED);
273 goto err;
274 }
275
276 return ret;
277
278 err:
279 EVP_PKEY_free(ret);
280 return NULL;
281 }
282
283 int EVP_PKEY_get_raw_private_key(const EVP_PKEY *pkey, unsigned char *priv,
284 size_t *len)
285 {
286 if (pkey->ameth->get_priv_key == NULL) {
287 EVPerr(EVP_F_EVP_PKEY_GET_RAW_PRIVATE_KEY,
288 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
289 return 0;
290 }
291
292 if (!pkey->ameth->get_priv_key(pkey, priv, len)) {
293 EVPerr(EVP_F_EVP_PKEY_GET_RAW_PRIVATE_KEY, EVP_R_GET_RAW_KEY_FAILED);
294 return 0;
295 }
296
297 return 1;
298 }
299
300 int EVP_PKEY_get_raw_public_key(const EVP_PKEY *pkey, unsigned char *pub,
301 size_t *len)
302 {
303 if (pkey->ameth->get_pub_key == NULL) {
304 EVPerr(EVP_F_EVP_PKEY_GET_RAW_PUBLIC_KEY,
305 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
306 return 0;
307 }
308
309 if (!pkey->ameth->get_pub_key(pkey, pub, len)) {
310 EVPerr(EVP_F_EVP_PKEY_GET_RAW_PUBLIC_KEY, EVP_R_GET_RAW_KEY_FAILED);
311 return 0;
312 }
313
314 return 1;
315 }
316
317 EVP_PKEY *EVP_PKEY_new_CMAC_key(ENGINE *e, const unsigned char *priv,
318 size_t len, const EVP_CIPHER *cipher)
319 {
320 #ifndef OPENSSL_NO_CMAC
321 EVP_PKEY *ret = EVP_PKEY_new();
322 EVP_MAC_CTX *cmctx = EVP_MAC_CTX_new_id(EVP_MAC_CMAC);
323
324 if (ret == NULL
325 || cmctx == NULL
326 || !pkey_set_type(ret, e, EVP_PKEY_CMAC, NULL, -1)) {
327 /* EVPerr already called */
328 goto err;
329 }
330
331 if (EVP_MAC_ctrl(cmctx, EVP_MAC_CTRL_SET_ENGINE, e) <= 0
332 || EVP_MAC_ctrl(cmctx, EVP_MAC_CTRL_SET_CIPHER, cipher) <= 0
333 || EVP_MAC_ctrl(cmctx, EVP_MAC_CTRL_SET_KEY, priv, len) <= 0) {
334 EVPerr(EVP_F_EVP_PKEY_NEW_CMAC_KEY, EVP_R_KEY_SETUP_FAILED);
335 goto err;
336 }
337
338 ret->pkey.ptr = cmctx;
339 return ret;
340
341 err:
342 EVP_PKEY_free(ret);
343 EVP_MAC_CTX_free(cmctx);
344 return NULL;
345 #else
346 EVPerr(EVP_F_EVP_PKEY_NEW_CMAC_KEY,
347 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
348 return NULL;
349 #endif
350 }
351
352 int EVP_PKEY_set_type(EVP_PKEY *pkey, int type)
353 {
354 return pkey_set_type(pkey, NULL, type, NULL, -1);
355 }
356
357 int EVP_PKEY_set_type_str(EVP_PKEY *pkey, const char *str, int len)
358 {
359 return pkey_set_type(pkey, NULL, EVP_PKEY_NONE, str, len);
360 }
361
362 int EVP_PKEY_set_alias_type(EVP_PKEY *pkey, int type)
363 {
364 if (pkey->type == type) {
365 return 1; /* it already is that type */
366 }
367
368 /*
369 * The application is requesting to alias this to a different pkey type,
370 * but not one that resolves to the base type.
371 */
372 if (EVP_PKEY_type(type) != EVP_PKEY_base_id(pkey)) {
373 EVPerr(EVP_F_EVP_PKEY_SET_ALIAS_TYPE, EVP_R_UNSUPPORTED_ALGORITHM);
374 return 0;
375 }
376
377 pkey->type = type;
378 return 1;
379 }
380
381 #ifndef OPENSSL_NO_ENGINE
382 int EVP_PKEY_set1_engine(EVP_PKEY *pkey, ENGINE *e)
383 {
384 if (e != NULL) {
385 if (!ENGINE_init(e)) {
386 EVPerr(EVP_F_EVP_PKEY_SET1_ENGINE, ERR_R_ENGINE_LIB);
387 return 0;
388 }
389 if (ENGINE_get_pkey_meth(e, pkey->type) == NULL) {
390 ENGINE_finish(e);
391 EVPerr(EVP_F_EVP_PKEY_SET1_ENGINE, EVP_R_UNSUPPORTED_ALGORITHM);
392 return 0;
393 }
394 }
395 ENGINE_finish(pkey->pmeth_engine);
396 pkey->pmeth_engine = e;
397 return 1;
398 }
399 #endif
400 int EVP_PKEY_assign(EVP_PKEY *pkey, int type, void *key)
401 {
402 if (pkey == NULL || !EVP_PKEY_set_type(pkey, type))
403 return 0;
404 pkey->pkey.ptr = key;
405 return (key != NULL);
406 }
407
408 void *EVP_PKEY_get0(const EVP_PKEY *pkey)
409 {
410 return pkey->pkey.ptr;
411 }
412
413 const unsigned char *EVP_PKEY_get0_hmac(const EVP_PKEY *pkey, size_t *len)
414 {
415 ASN1_OCTET_STRING *os = NULL;
416 if (pkey->type != EVP_PKEY_HMAC) {
417 EVPerr(EVP_F_EVP_PKEY_GET0_HMAC, EVP_R_EXPECTING_AN_HMAC_KEY);
418 return NULL;
419 }
420 os = EVP_PKEY_get0(pkey);
421 *len = os->length;
422 return os->data;
423 }
424
425 #ifndef OPENSSL_NO_POLY1305
426 const unsigned char *EVP_PKEY_get0_poly1305(const EVP_PKEY *pkey, size_t *len)
427 {
428 ASN1_OCTET_STRING *os = NULL;
429 if (pkey->type != EVP_PKEY_POLY1305) {
430 EVPerr(EVP_F_EVP_PKEY_GET0_POLY1305, EVP_R_EXPECTING_A_POLY1305_KEY);
431 return NULL;
432 }
433 os = EVP_PKEY_get0(pkey);
434 *len = os->length;
435 return os->data;
436 }
437 #endif
438
439 #ifndef OPENSSL_NO_SIPHASH
440 const unsigned char *EVP_PKEY_get0_siphash(const EVP_PKEY *pkey, size_t *len)
441 {
442 ASN1_OCTET_STRING *os = NULL;
443
444 if (pkey->type != EVP_PKEY_SIPHASH) {
445 EVPerr(EVP_F_EVP_PKEY_GET0_SIPHASH, EVP_R_EXPECTING_A_SIPHASH_KEY);
446 return NULL;
447 }
448 os = EVP_PKEY_get0(pkey);
449 *len = os->length;
450 return os->data;
451 }
452 #endif
453
454 #ifndef OPENSSL_NO_RSA
455 int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key)
456 {
457 int ret = EVP_PKEY_assign_RSA(pkey, key);
458 if (ret)
459 RSA_up_ref(key);
460 return ret;
461 }
462
463 RSA *EVP_PKEY_get0_RSA(EVP_PKEY *pkey)
464 {
465 if (pkey->type != EVP_PKEY_RSA) {
466 EVPerr(EVP_F_EVP_PKEY_GET0_RSA, EVP_R_EXPECTING_AN_RSA_KEY);
467 return NULL;
468 }
469 return pkey->pkey.rsa;
470 }
471
472 RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey)
473 {
474 RSA *ret = EVP_PKEY_get0_RSA(pkey);
475 if (ret != NULL)
476 RSA_up_ref(ret);
477 return ret;
478 }
479 #endif
480
481 #ifndef OPENSSL_NO_DSA
482 int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key)
483 {
484 int ret = EVP_PKEY_assign_DSA(pkey, key);
485 if (ret)
486 DSA_up_ref(key);
487 return ret;
488 }
489
490 DSA *EVP_PKEY_get0_DSA(EVP_PKEY *pkey)
491 {
492 if (pkey->type != EVP_PKEY_DSA) {
493 EVPerr(EVP_F_EVP_PKEY_GET0_DSA, EVP_R_EXPECTING_A_DSA_KEY);
494 return NULL;
495 }
496 return pkey->pkey.dsa;
497 }
498
499 DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey)
500 {
501 DSA *ret = EVP_PKEY_get0_DSA(pkey);
502 if (ret != NULL)
503 DSA_up_ref(ret);
504 return ret;
505 }
506 #endif
507
508 #ifndef OPENSSL_NO_EC
509
510 int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key)
511 {
512 int ret = EVP_PKEY_assign_EC_KEY(pkey, key);
513 if (ret)
514 EC_KEY_up_ref(key);
515 return ret;
516 }
517
518 EC_KEY *EVP_PKEY_get0_EC_KEY(EVP_PKEY *pkey)
519 {
520 if (pkey->type != EVP_PKEY_EC) {
521 EVPerr(EVP_F_EVP_PKEY_GET0_EC_KEY, EVP_R_EXPECTING_A_EC_KEY);
522 return NULL;
523 }
524 return pkey->pkey.ec;
525 }
526
527 EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey)
528 {
529 EC_KEY *ret = EVP_PKEY_get0_EC_KEY(pkey);
530 if (ret != NULL)
531 EC_KEY_up_ref(ret);
532 return ret;
533 }
534 #endif
535
536 #ifndef OPENSSL_NO_DH
537
538 int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *key)
539 {
540 int ret = EVP_PKEY_assign_DH(pkey, key);
541 if (ret)
542 DH_up_ref(key);
543 return ret;
544 }
545
546 DH *EVP_PKEY_get0_DH(EVP_PKEY *pkey)
547 {
548 if (pkey->type != EVP_PKEY_DH && pkey->type != EVP_PKEY_DHX) {
549 EVPerr(EVP_F_EVP_PKEY_GET0_DH, EVP_R_EXPECTING_A_DH_KEY);
550 return NULL;
551 }
552 return pkey->pkey.dh;
553 }
554
555 DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey)
556 {
557 DH *ret = EVP_PKEY_get0_DH(pkey);
558 if (ret != NULL)
559 DH_up_ref(ret);
560 return ret;
561 }
562 #endif
563
564 int EVP_PKEY_type(int type)
565 {
566 int ret;
567 const EVP_PKEY_ASN1_METHOD *ameth;
568 ENGINE *e;
569 ameth = EVP_PKEY_asn1_find(&e, type);
570 if (ameth)
571 ret = ameth->pkey_id;
572 else
573 ret = NID_undef;
574 #ifndef OPENSSL_NO_ENGINE
575 ENGINE_finish(e);
576 #endif
577 return ret;
578 }
579
580 int EVP_PKEY_id(const EVP_PKEY *pkey)
581 {
582 return pkey->type;
583 }
584
585 int EVP_PKEY_base_id(const EVP_PKEY *pkey)
586 {
587 return EVP_PKEY_type(pkey->type);
588 }
589
590 void EVP_PKEY_free(EVP_PKEY *x)
591 {
592 int i;
593
594 if (x == NULL)
595 return;
596
597 CRYPTO_DOWN_REF(&x->references, &i, x->lock);
598 REF_PRINT_COUNT("EVP_PKEY", x);
599 if (i > 0)
600 return;
601 REF_ASSERT_ISNT(i < 0);
602 EVP_PKEY_free_it(x);
603 CRYPTO_THREAD_lock_free(x->lock);
604 sk_X509_ATTRIBUTE_pop_free(x->attributes, X509_ATTRIBUTE_free);
605 OPENSSL_free(x);
606 }
607
608 static void EVP_PKEY_free_it(EVP_PKEY *x)
609 {
610 /* internal function; x is never NULL */
611 if (x->ameth && x->ameth->pkey_free) {
612 x->ameth->pkey_free(x);
613 x->pkey.ptr = NULL;
614 }
615 #ifndef OPENSSL_NO_ENGINE
616 ENGINE_finish(x->engine);
617 x->engine = NULL;
618 ENGINE_finish(x->pmeth_engine);
619 x->pmeth_engine = NULL;
620 #endif
621 }
622
623 static int unsup_alg(BIO *out, const EVP_PKEY *pkey, int indent,
624 const char *kstr)
625 {
626 BIO_indent(out, indent, 128);
627 BIO_printf(out, "%s algorithm \"%s\" unsupported\n",
628 kstr, OBJ_nid2ln(pkey->type));
629 return 1;
630 }
631
632 int EVP_PKEY_print_public(BIO *out, const EVP_PKEY *pkey,
633 int indent, ASN1_PCTX *pctx)
634 {
635 if (pkey->ameth && pkey->ameth->pub_print)
636 return pkey->ameth->pub_print(out, pkey, indent, pctx);
637
638 return unsup_alg(out, pkey, indent, "Public Key");
639 }
640
641 int EVP_PKEY_print_private(BIO *out, const EVP_PKEY *pkey,
642 int indent, ASN1_PCTX *pctx)
643 {
644 if (pkey->ameth && pkey->ameth->priv_print)
645 return pkey->ameth->priv_print(out, pkey, indent, pctx);
646
647 return unsup_alg(out, pkey, indent, "Private Key");
648 }
649
650 int EVP_PKEY_print_params(BIO *out, const EVP_PKEY *pkey,
651 int indent, ASN1_PCTX *pctx)
652 {
653 if (pkey->ameth && pkey->ameth->param_print)
654 return pkey->ameth->param_print(out, pkey, indent, pctx);
655 return unsup_alg(out, pkey, indent, "Parameters");
656 }
657
658 static int evp_pkey_asn1_ctrl(EVP_PKEY *pkey, int op, int arg1, void *arg2)
659 {
660 if (pkey->ameth == NULL || pkey->ameth->pkey_ctrl == NULL)
661 return -2;
662 return pkey->ameth->pkey_ctrl(pkey, op, arg1, arg2);
663 }
664
665 int EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int *pnid)
666 {
667 return evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_DEFAULT_MD_NID, 0, pnid);
668 }
669
670 int EVP_PKEY_supports_digest_nid(EVP_PKEY *pkey, int nid)
671 {
672 int rv, default_nid;
673
674 rv = evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_SUPPORTS_MD_NID, nid, NULL);
675 if (rv == -2) {
676 /*
677 * If there is a mandatory default digest and this isn't it, then
678 * the answer is 'no'.
679 */
680 rv = EVP_PKEY_get_default_digest_nid(pkey, &default_nid);
681 if (rv == 2)
682 return (nid == default_nid);
683 /* zero is an error from EVP_PKEY_get_default_digest_nid() */
684 if (rv == 0)
685 return -1;
686 }
687 return rv;
688 }
689
690 int EVP_PKEY_set1_tls_encodedpoint(EVP_PKEY *pkey,
691 const unsigned char *pt, size_t ptlen)
692 {
693 if (ptlen > INT_MAX)
694 return 0;
695 if (evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_SET1_TLS_ENCPT, ptlen,
696 (void *)pt) <= 0)
697 return 0;
698 return 1;
699 }
700
701 size_t EVP_PKEY_get1_tls_encodedpoint(EVP_PKEY *pkey, unsigned char **ppt)
702 {
703 int rv;
704 rv = evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_GET1_TLS_ENCPT, 0, ppt);
705 if (rv <= 0)
706 return 0;
707 return rv;
708 }