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58964a49 1/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
d02b48c6
RE
2 * All rights reserved.
3 *
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
0f113f3e 7 *
d02b48c6
RE
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
0f113f3e 14 *
d02b48c6
RE
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
0f113f3e 21 *
d02b48c6
RE
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
0f113f3e 36 * 4. If you include any Windows specific code (or a derivative thereof) from
d02b48c6
RE
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
0f113f3e 39 *
d02b48c6
RE
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
0f113f3e 51 *
d02b48c6
RE
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.]
56 */
57
58#include <stdio.h>
b39fc560 59#include "internal/cryptlib.h"
4d94ae00
BM
60#include <openssl/bn.h>
61#include <openssl/err.h>
ec577822
BM
62#include <openssl/objects.h>
63#include <openssl/evp.h>
ec577822 64#include <openssl/x509.h>
3c27208f
RS
65#include <openssl/rsa.h>
66#include <openssl/dsa.h>
67#include <openssl/dh.h>
68#include <openssl/engine.h>
01b8b3c7 69
5fe736e5 70#include "internal/asn1_int.h"
3aeb9348 71#include "internal/evp_int.h"
18e377b4 72
d02b48c6 73static void EVP_PKEY_free_it(EVP_PKEY *x);
bb2297a4 74
6b691a5c 75int EVP_PKEY_bits(EVP_PKEY *pkey)
0f113f3e
MC
76{
77 if (pkey && pkey->ameth && pkey->ameth->pkey_bits)
78 return pkey->ameth->pkey_bits(pkey);
79 return 0;
80}
58964a49 81
2514fa79 82int EVP_PKEY_security_bits(const EVP_PKEY *pkey)
0f113f3e
MC
83{
84 if (pkey == NULL)
85 return 0;
86 if (!pkey->ameth || !pkey->ameth->pkey_security_bits)
87 return -2;
88 return pkey->ameth->pkey_security_bits(pkey);
89}
2514fa79 90
6b691a5c 91int EVP_PKEY_size(EVP_PKEY *pkey)
0f113f3e
MC
92{
93 if (pkey && pkey->ameth && pkey->ameth->pkey_size)
94 return pkey->ameth->pkey_size(pkey);
95 return 0;
96}
d02b48c6 97
6b691a5c 98int EVP_PKEY_save_parameters(EVP_PKEY *pkey, int mode)
0f113f3e 99{
cf1b7d96 100#ifndef OPENSSL_NO_DSA
0f113f3e
MC
101 if (pkey->type == EVP_PKEY_DSA) {
102 int ret = pkey->save_parameters;
103
104 if (mode >= 0)
105 pkey->save_parameters = mode;
106 return (ret);
107 }
4d94ae00 108#endif
5488bb61 109#ifndef OPENSSL_NO_EC
0f113f3e
MC
110 if (pkey->type == EVP_PKEY_EC) {
111 int ret = pkey->save_parameters;
112
113 if (mode >= 0)
114 pkey->save_parameters = mode;
115 return (ret);
116 }
d02b48c6 117#endif
0f113f3e
MC
118 return (0);
119}
d02b48c6 120
a8b72844 121int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
0f113f3e 122{
2986ecdc
DSH
123 if (to->type == EVP_PKEY_NONE) {
124 if (EVP_PKEY_set_type(to, from->type) == 0)
125 return 0;
126 } else if (to->type != from->type) {
0f113f3e
MC
127 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_DIFFERENT_KEY_TYPES);
128 goto err;
129 }
130
131 if (EVP_PKEY_missing_parameters(from)) {
132 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_MISSING_PARAMETERS);
133 goto err;
134 }
135 if (from->ameth && from->ameth->param_copy)
136 return from->ameth->param_copy(to, from);
137 err:
138 return 0;
139}
d02b48c6 140
af0f0f3e 141int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey)
0f113f3e
MC
142{
143 if (pkey->ameth && pkey->ameth->param_missing)
144 return pkey->ameth->param_missing(pkey);
145 return 0;
146}
d02b48c6 147
af0f0f3e 148int EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
0f113f3e
MC
149{
150 if (a->type != b->type)
151 return -1;
152 if (a->ameth && a->ameth->param_cmp)
153 return a->ameth->param_cmp(a, b);
154 return -2;
155}
58964a49 156
af0f0f3e 157int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
0f113f3e
MC
158{
159 if (a->type != b->type)
160 return -1;
161
162 if (a->ameth) {
163 int ret;
164 /* Compare parameters if the algorithm has them */
165 if (a->ameth->param_cmp) {
166 ret = a->ameth->param_cmp(a, b);
167 if (ret <= 0)
168 return ret;
169 }
170
171 if (a->ameth->pub_cmp)
172 return a->ameth->pub_cmp(a, b);
173 }
174
175 return -2;
176}
e6526fbf 177
6b691a5c 178EVP_PKEY *EVP_PKEY_new(void)
0f113f3e 179{
a2d0baa2 180 EVP_PKEY *ret = OPENSSL_zalloc(sizeof(*ret));
0f113f3e 181
0f113f3e
MC
182 if (ret == NULL) {
183 EVPerr(EVP_F_EVP_PKEY_NEW, ERR_R_MALLOC_FAILURE);
03273d61 184 return NULL;
0f113f3e
MC
185 }
186 ret->type = EVP_PKEY_NONE;
187 ret->save_type = EVP_PKEY_NONE;
188 ret->references = 1;
0f113f3e 189 ret->save_parameters = 1;
03273d61
AG
190 ret->lock = CRYPTO_THREAD_lock_new();
191 if (ret->lock == NULL) {
192 EVPerr(EVP_F_EVP_PKEY_NEW, ERR_R_MALLOC_FAILURE);
193 OPENSSL_free(ret);
194 return NULL;
195 }
196 return ret;
0f113f3e
MC
197}
198
2872dbe1
DSH
199void EVP_PKEY_up_ref(EVP_PKEY *pkey)
200{
03273d61
AG
201 int i;
202 CRYPTO_atomic_add(&pkey->references, 1, &i, pkey->lock);
2872dbe1
DSH
203}
204
0f113f3e
MC
205/*
206 * Setup a public key ASN1 method and ENGINE from a NID or a string. If pkey
207 * is NULL just return 1 or 0 if the algorithm exists.
01b8b3c7
DSH
208 */
209
210static int pkey_set_type(EVP_PKEY *pkey, int type, const char *str, int len)
0f113f3e
MC
211{
212 const EVP_PKEY_ASN1_METHOD *ameth;
213 ENGINE *e = NULL;
214 if (pkey) {
215 if (pkey->pkey.ptr)
216 EVP_PKEY_free_it(pkey);
217 /*
218 * If key type matches and a method exists then this lookup has
219 * succeeded once so just indicate success.
220 */
221 if ((type == pkey->save_type) && pkey->ameth)
222 return 1;
01b8b3c7 223#ifndef OPENSSL_NO_ENGINE
0f113f3e 224 /* If we have an ENGINE release it */
7c96dbcd
RS
225 ENGINE_finish(pkey->engine);
226 pkey->engine = NULL;
01b8b3c7 227#endif
0f113f3e
MC
228 }
229 if (str)
230 ameth = EVP_PKEY_asn1_find_str(&e, str, len);
231 else
232 ameth = EVP_PKEY_asn1_find(&e, type);
01b8b3c7 233#ifndef OPENSSL_NO_ENGINE
7c96dbcd 234 if (pkey == NULL)
0f113f3e 235 ENGINE_finish(e);
01b8b3c7 236#endif
7c96dbcd 237 if (ameth == NULL) {
0f113f3e
MC
238 EVPerr(EVP_F_PKEY_SET_TYPE, EVP_R_UNSUPPORTED_ALGORITHM);
239 return 0;
240 }
241 if (pkey) {
242 pkey->ameth = ameth;
243 pkey->engine = e;
244
245 pkey->type = pkey->ameth->pkey_id;
246 pkey->save_type = type;
247 }
248 return 1;
249}
01b8b3c7
DSH
250
251int EVP_PKEY_set_type(EVP_PKEY *pkey, int type)
0f113f3e
MC
252{
253 return pkey_set_type(pkey, type, NULL, -1);
254}
01b8b3c7
DSH
255
256int EVP_PKEY_set_type_str(EVP_PKEY *pkey, const char *str, int len)
0f113f3e
MC
257{
258 return pkey_set_type(pkey, EVP_PKEY_NONE, str, len);
259}
01b8b3c7
DSH
260
261int EVP_PKEY_assign(EVP_PKEY *pkey, int type, void *key)
0f113f3e 262{
e34c66c6 263 if (pkey == NULL || !EVP_PKEY_set_type(pkey, type))
0f113f3e
MC
264 return 0;
265 pkey->pkey.ptr = key;
266 return (key != NULL);
267}
d02b48c6 268
3aeb9348 269void *EVP_PKEY_get0(const EVP_PKEY *pkey)
0f113f3e
MC
270{
271 return pkey->pkey.ptr;
272}
db98bbc1 273
cf1b7d96 274#ifndef OPENSSL_NO_RSA
c7cb16a8 275int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key)
52664f50 276{
0f113f3e
MC
277 int ret = EVP_PKEY_assign_RSA(pkey, key);
278 if (ret)
279 RSA_up_ref(key);
280 return ret;
52664f50
DSH
281}
282
2872dbe1 283RSA *EVP_PKEY_get0_RSA(EVP_PKEY *pkey)
0f113f3e
MC
284{
285 if (pkey->type != EVP_PKEY_RSA) {
2872dbe1 286 EVPerr(EVP_F_EVP_PKEY_GET0_RSA, EVP_R_EXPECTING_AN_RSA_KEY);
0f113f3e
MC
287 return NULL;
288 }
0f113f3e 289 return pkey->pkey.rsa;
f769ce3e 290}
2872dbe1
DSH
291
292RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey)
293{
294 RSA *ret = EVP_PKEY_get0_RSA(pkey);
295 if (ret != NULL)
296 RSA_up_ref(ret);
297 return ret;
298}
f769ce3e
DSH
299#endif
300
cf1b7d96 301#ifndef OPENSSL_NO_DSA
c7cb16a8 302int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key)
52664f50 303{
0f113f3e
MC
304 int ret = EVP_PKEY_assign_DSA(pkey, key);
305 if (ret)
306 DSA_up_ref(key);
307 return ret;
52664f50
DSH
308}
309
2872dbe1 310DSA *EVP_PKEY_get0_DSA(EVP_PKEY *pkey)
0f113f3e
MC
311{
312 if (pkey->type != EVP_PKEY_DSA) {
2872dbe1 313 EVPerr(EVP_F_EVP_PKEY_GET0_DSA, EVP_R_EXPECTING_A_DSA_KEY);
0f113f3e
MC
314 return NULL;
315 }
0f113f3e 316 return pkey->pkey.dsa;
f769ce3e 317}
2872dbe1
DSH
318
319DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey)
320{
321 DSA *ret = EVP_PKEY_get0_DSA(pkey);
322 if (ret != NULL)
323 DSA_up_ref(ret);
324 return ret;
325}
f769ce3e
DSH
326#endif
327
14a7cfb3 328#ifndef OPENSSL_NO_EC
4d94ae00 329
14a7cfb3 330int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key)
4d94ae00 331{
0f113f3e
MC
332 int ret = EVP_PKEY_assign_EC_KEY(pkey, key);
333 if (ret)
334 EC_KEY_up_ref(key);
335 return ret;
4d94ae00
BM
336}
337
2872dbe1 338EC_KEY *EVP_PKEY_get0_EC_KEY(EVP_PKEY *pkey)
4d94ae00 339{
0f113f3e 340 if (pkey->type != EVP_PKEY_EC) {
2872dbe1 341 EVPerr(EVP_F_EVP_PKEY_GET0_EC_KEY, EVP_R_EXPECTING_A_EC_KEY);
0f113f3e
MC
342 return NULL;
343 }
0f113f3e 344 return pkey->pkey.ec;
4d94ae00 345}
2872dbe1
DSH
346
347EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey)
348{
349 EC_KEY *ret = EVP_PKEY_get0_EC_KEY(pkey);
350 if (ret != NULL)
351 EC_KEY_up_ref(ret);
352 return ret;
353}
4d94ae00
BM
354#endif
355
cf1b7d96 356#ifndef OPENSSL_NO_DH
52664f50 357
c7cb16a8 358int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *key)
52664f50 359{
0f113f3e
MC
360 int ret = EVP_PKEY_assign_DH(pkey, key);
361 if (ret)
362 DH_up_ref(key);
363 return ret;
52664f50
DSH
364}
365
2872dbe1 366DH *EVP_PKEY_get0_DH(EVP_PKEY *pkey)
0f113f3e
MC
367{
368 if (pkey->type != EVP_PKEY_DH && pkey->type != EVP_PKEY_DHX) {
2872dbe1 369 EVPerr(EVP_F_EVP_PKEY_GET0_DH, EVP_R_EXPECTING_A_DH_KEY);
0f113f3e
MC
370 return NULL;
371 }
0f113f3e 372 return pkey->pkey.dh;
f769ce3e 373}
2872dbe1
DSH
374
375DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey)
376{
377 DH *ret = EVP_PKEY_get0_DH(pkey);
378 if (ret != NULL)
379 DH_up_ref(ret);
380 return ret;
381}
f769ce3e
DSH
382#endif
383
6b691a5c 384int EVP_PKEY_type(int type)
0f113f3e
MC
385{
386 int ret;
387 const EVP_PKEY_ASN1_METHOD *ameth;
388 ENGINE *e;
389 ameth = EVP_PKEY_asn1_find(&e, type);
390 if (ameth)
391 ret = ameth->pkey_id;
392 else
393 ret = NID_undef;
01b8b3c7 394#ifndef OPENSSL_NO_ENGINE
7c96dbcd 395 ENGINE_finish(e);
01b8b3c7 396#endif
0f113f3e
MC
397 return ret;
398}
d02b48c6 399
7f57b076 400int EVP_PKEY_id(const EVP_PKEY *pkey)
0f113f3e
MC
401{
402 return pkey->type;
403}
7f57b076
DSH
404
405int EVP_PKEY_base_id(const EVP_PKEY *pkey)
0f113f3e
MC
406{
407 return EVP_PKEY_type(pkey->type);
408}
7f57b076 409
6b691a5c 410void EVP_PKEY_free(EVP_PKEY *x)
0f113f3e
MC
411{
412 int i;
d02b48c6 413
0f113f3e
MC
414 if (x == NULL)
415 return;
d02b48c6 416
03273d61 417 CRYPTO_atomic_add(&x->references, -1, &i, x->lock);
f3f1cf84 418 REF_PRINT_COUNT("EVP_PKEY", x);
0f113f3e
MC
419 if (i > 0)
420 return;
f3f1cf84 421 REF_ASSERT_ISNT(i < 0);
0f113f3e 422 EVP_PKEY_free_it(x);
222561fe 423 sk_X509_ATTRIBUTE_pop_free(x->attributes, X509_ATTRIBUTE_free);
0f113f3e
MC
424 OPENSSL_free(x);
425}
d02b48c6 426
6b691a5c 427static void EVP_PKEY_free_it(EVP_PKEY *x)
0f113f3e 428{
c5ba2d99 429 /* internal function; x is never NULL */
0f113f3e
MC
430 if (x->ameth && x->ameth->pkey_free) {
431 x->ameth->pkey_free(x);
432 x->pkey.ptr = NULL;
433 }
01b8b3c7 434#ifndef OPENSSL_NO_ENGINE
7c96dbcd
RS
435 ENGINE_finish(x->engine);
436 x->engine = NULL;
01b8b3c7 437#endif
03273d61 438 CRYPTO_THREAD_lock_free(x->lock);
0f113f3e 439}
d02b48c6 440
35208f36 441static int unsup_alg(BIO *out, const EVP_PKEY *pkey, int indent,
0f113f3e
MC
442 const char *kstr)
443{
444 BIO_indent(out, indent, 128);
445 BIO_printf(out, "%s algorithm \"%s\" unsupported\n",
446 kstr, OBJ_nid2ln(pkey->type));
447 return 1;
448}
35208f36
DSH
449
450int EVP_PKEY_print_public(BIO *out, const EVP_PKEY *pkey,
0f113f3e
MC
451 int indent, ASN1_PCTX *pctx)
452{
453 if (pkey->ameth && pkey->ameth->pub_print)
454 return pkey->ameth->pub_print(out, pkey, indent, pctx);
455
456 return unsup_alg(out, pkey, indent, "Public Key");
457}
35208f36
DSH
458
459int EVP_PKEY_print_private(BIO *out, const EVP_PKEY *pkey,
0f113f3e
MC
460 int indent, ASN1_PCTX *pctx)
461{
462 if (pkey->ameth && pkey->ameth->priv_print)
463 return pkey->ameth->priv_print(out, pkey, indent, pctx);
464
465 return unsup_alg(out, pkey, indent, "Private Key");
466}
35208f36
DSH
467
468int EVP_PKEY_print_params(BIO *out, const EVP_PKEY *pkey,
0f113f3e
MC
469 int indent, ASN1_PCTX *pctx)
470{
471 if (pkey->ameth && pkey->ameth->param_print)
472 return pkey->ameth->param_print(out, pkey, indent, pctx);
473 return unsup_alg(out, pkey, indent, "Parameters");
474}
03919683
DSH
475
476int EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int *pnid)
0f113f3e
MC
477{
478 if (!pkey->ameth || !pkey->ameth->pkey_ctrl)
479 return -2;
480 return pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_DEFAULT_MD_NID,
481 0, pnid);
482}