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1/* crypto/evp/p_lib.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59#include <stdio.h>
60#include "cryptlib.h"
61#include <openssl/bn.h>
62#include <openssl/err.h>
63#include <openssl/objects.h>
64#include <openssl/evp.h>
65#include <openssl/asn1_mac.h>
66#include <openssl/x509.h>
67#ifndef OPENSSL_NO_RSA
68#include <openssl/rsa.h>
69#endif
70#ifndef OPENSSL_NO_DSA
71#include <openssl/dsa.h>
72#endif
73#ifndef OPENSSL_NO_DH
74#include <openssl/dh.h>
75#endif
76
77static void EVP_PKEY_free_it(EVP_PKEY *x);
78
79int EVP_PKEY_bits(EVP_PKEY *pkey)
80 {
81 if (0)
82 return 0;
83#ifndef OPENSSL_NO_RSA
84 else if (pkey->type == EVP_PKEY_RSA)
85 return(BN_num_bits(pkey->pkey.rsa->n));
86#endif
87#ifndef OPENSSL_NO_DSA
88 else if (pkey->type == EVP_PKEY_DSA)
89 return(BN_num_bits(pkey->pkey.dsa->p));
90#endif
91#ifndef OPENSSL_NO_EC
92 else if (pkey->type == EVP_PKEY_EC)
93 {
94 BIGNUM *order = BN_new();
95 const EC_GROUP *group;
96 int ret;
97
98 if (!order)
99 {
100 ERR_clear_error();
101 return 0;
102 }
103 group = EC_KEY_get0_group(pkey->pkey.ec);
104 if (!EC_GROUP_get_order(group, order, NULL))
105 {
106 ERR_clear_error();
107 return 0;
108 }
109
110 ret = BN_num_bits(order);
111 BN_free(order);
112 return ret;
113 }
114#endif
115 return(0);
116 }
117
118int EVP_PKEY_size(EVP_PKEY *pkey)
119 {
120 if (pkey == NULL)
121 return(0);
122#ifndef OPENSSL_NO_RSA
123 if (pkey->type == EVP_PKEY_RSA)
124 return(RSA_size(pkey->pkey.rsa));
125 else
126#endif
127#ifndef OPENSSL_NO_DSA
128 if (pkey->type == EVP_PKEY_DSA)
129 return(DSA_size(pkey->pkey.dsa));
130#endif
131#ifndef OPENSSL_NO_ECDSA
132 if (pkey->type == EVP_PKEY_EC)
133 return(ECDSA_size(pkey->pkey.ec));
134#endif
135
136 return(0);
137 }
138
139int EVP_PKEY_save_parameters(EVP_PKEY *pkey, int mode)
140 {
141#ifndef OPENSSL_NO_DSA
142 if (pkey->type == EVP_PKEY_DSA)
143 {
144 int ret=pkey->save_parameters;
145
146 if (mode >= 0)
147 pkey->save_parameters=mode;
148 return(ret);
149 }
150#endif
151#ifndef OPENSSL_NO_EC
152 if (pkey->type == EVP_PKEY_EC)
153 {
154 int ret = pkey->save_parameters;
155
156 if (mode >= 0)
157 pkey->save_parameters = mode;
158 return(ret);
159 }
160#endif
161 return(0);
162 }
163
164int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
165 {
166 if (to->type != from->type)
167 {
168 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS,EVP_R_DIFFERENT_KEY_TYPES);
169 goto err;
170 }
171
172 if (EVP_PKEY_missing_parameters(from))
173 {
174 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS,EVP_R_MISSING_PARAMETERS);
175 goto err;
176 }
177#ifndef OPENSSL_NO_DSA
178 if (to->type == EVP_PKEY_DSA)
179 {
180 BIGNUM *a;
181
182 if ((a=BN_dup(from->pkey.dsa->p)) == NULL) goto err;
183 if (to->pkey.dsa->p != NULL) BN_free(to->pkey.dsa->p);
184 to->pkey.dsa->p=a;
185
186 if ((a=BN_dup(from->pkey.dsa->q)) == NULL) goto err;
187 if (to->pkey.dsa->q != NULL) BN_free(to->pkey.dsa->q);
188 to->pkey.dsa->q=a;
189
190 if ((a=BN_dup(from->pkey.dsa->g)) == NULL) goto err;
191 if (to->pkey.dsa->g != NULL) BN_free(to->pkey.dsa->g);
192 to->pkey.dsa->g=a;
193 }
194#endif
195#ifndef OPENSSL_NO_EC
196 if (to->type == EVP_PKEY_EC)
197 {
198 EC_GROUP *group = EC_GROUP_dup(EC_KEY_get0_group(from->pkey.ec));
199 if (group == NULL)
200 goto err;
201 if (EC_KEY_set_group(to->pkey.ec, group) == 0)
202 goto err;
203 EC_GROUP_free(group);
204 }
205#endif
206 return(1);
207err:
208 return(0);
209 }
210
211int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey)
212 {
213#ifndef OPENSSL_NO_DSA
214 if (pkey->type == EVP_PKEY_DSA)
215 {
216 DSA *dsa;
217
218 dsa=pkey->pkey.dsa;
219 if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))
220 return(1);
221 }
222#endif
223#ifndef OPENSSL_NO_EC
224 if (pkey->type == EVP_PKEY_EC)
225 {
226 if (EC_KEY_get0_group(pkey->pkey.ec) == NULL)
227 return(1);
228 }
229#endif
230
231 return(0);
232 }
233
234int EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
235 {
236#ifndef OPENSSL_NO_DSA
237 if ((a->type == EVP_PKEY_DSA) && (b->type == EVP_PKEY_DSA))
238 {
239 if ( BN_cmp(a->pkey.dsa->p,b->pkey.dsa->p) ||
240 BN_cmp(a->pkey.dsa->q,b->pkey.dsa->q) ||
241 BN_cmp(a->pkey.dsa->g,b->pkey.dsa->g))
242 return(0);
243 else
244 return(1);
245 }
246#endif
247#ifndef OPENSSL_NO_EC
248 if (a->type == EVP_PKEY_EC && b->type == EVP_PKEY_EC)
249 {
250 const EC_GROUP *group_a = EC_KEY_get0_group(a->pkey.ec),
251 *group_b = EC_KEY_get0_group(b->pkey.ec);
252 if (EC_GROUP_cmp(group_a, group_b, NULL))
253 return 0;
254 else
255 return 1;
256 }
257#endif
258 return(-1);
259 }
260
261int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
262 {
263 if (a->type != b->type)
264 return -1;
265
266 if (EVP_PKEY_cmp_parameters(a, b) == 0)
267 return 0;
268
269 switch (a->type)
270 {
271#ifndef OPENSSL_NO_RSA
272 case EVP_PKEY_RSA:
273 if (BN_cmp(b->pkey.rsa->n,a->pkey.rsa->n) != 0
274 || BN_cmp(b->pkey.rsa->e,a->pkey.rsa->e) != 0)
275 return 0;
276 break;
277#endif
278#ifndef OPENSSL_NO_DSA
279 case EVP_PKEY_DSA:
280 if (BN_cmp(b->pkey.dsa->pub_key,a->pkey.dsa->pub_key) != 0)
281 return 0;
282 break;
283#endif
284#ifndef OPENSSL_NO_EC
285 case EVP_PKEY_EC:
286 {
287 int r;
288 const EC_GROUP *group = EC_KEY_get0_group(b->pkey.ec);
289 const EC_POINT *pa = EC_KEY_get0_public_key(a->pkey.ec),
290 *pb = EC_KEY_get0_public_key(b->pkey.ec);
291 r = EC_POINT_cmp(group, pa, pb, NULL);
292 if (r != 0)
293 {
294 if (r == 1)
295 return 0;
296 else
297 return -2;
298 }
299 }
300 break;
301#endif
302#ifndef OPENSSL_NO_DH
303 case EVP_PKEY_DH:
304 return -2;
305#endif
306 default:
307 return -2;
308 }
309
310 return 1;
311 }
312
313EVP_PKEY *EVP_PKEY_new(void)
314 {
315 EVP_PKEY *ret;
316
317 ret=(EVP_PKEY *)OPENSSL_malloc(sizeof(EVP_PKEY));
318 if (ret == NULL)
319 {
320 EVPerr(EVP_F_EVP_PKEY_NEW,ERR_R_MALLOC_FAILURE);
321 return(NULL);
322 }
323 ret->type=EVP_PKEY_NONE;
324 ret->references=1;
325 ret->pkey.ptr=NULL;
326 ret->attributes=NULL;
327 ret->save_parameters=1;
328 return(ret);
329 }
330
331int EVP_PKEY_assign(EVP_PKEY *pkey, int type, char *key)
332 {
333 if (pkey == NULL) return(0);
334 if (pkey->pkey.ptr != NULL)
335 EVP_PKEY_free_it(pkey);
336 pkey->type=EVP_PKEY_type(type);
337 pkey->save_type=type;
338 pkey->pkey.ptr=key;
339 return(key != NULL);
340 }
341
342#ifndef OPENSSL_NO_RSA
343int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key)
344{
345 int ret = EVP_PKEY_assign_RSA(pkey, key);
346 if(ret)
347 RSA_up_ref(key);
348 return ret;
349}
350
351RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey)
352 {
353 if(pkey->type != EVP_PKEY_RSA) {
354 EVPerr(EVP_F_EVP_PKEY_GET1_RSA, EVP_R_EXPECTING_AN_RSA_KEY);
355 return NULL;
356 }
357 RSA_up_ref(pkey->pkey.rsa);
358 return pkey->pkey.rsa;
359}
360#endif
361
362#ifndef OPENSSL_NO_DSA
363int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key)
364{
365 int ret = EVP_PKEY_assign_DSA(pkey, key);
366 if(ret)
367 DSA_up_ref(key);
368 return ret;
369}
370
371DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey)
372 {
373 if(pkey->type != EVP_PKEY_DSA) {
374 EVPerr(EVP_F_EVP_PKEY_GET1_DSA, EVP_R_EXPECTING_A_DSA_KEY);
375 return NULL;
376 }
377 DSA_up_ref(pkey->pkey.dsa);
378 return pkey->pkey.dsa;
379}
380#endif
381
382#ifndef OPENSSL_NO_EC
383
384int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key)
385{
386 int ret = EVP_PKEY_assign_EC_KEY(pkey,key);
387 if (ret)
388 EC_KEY_up_ref(key);
389 return ret;
390}
391
392EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey)
393{
394 if (pkey->type != EVP_PKEY_EC)
395 {
396 EVPerr(EVP_F_EVP_PKEY_GET1_EC_KEY, EVP_R_EXPECTING_A_EC_KEY);
397 return NULL;
398 }
399 EC_KEY_up_ref(pkey->pkey.ec);
400 return pkey->pkey.ec;
401}
402#endif
403
404
405#ifndef OPENSSL_NO_DH
406
407int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *key)
408{
409 int ret = EVP_PKEY_assign_DH(pkey, key);
410 if(ret)
411 DH_up_ref(key);
412 return ret;
413}
414
415DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey)
416 {
417 if(pkey->type != EVP_PKEY_DH) {
418 EVPerr(EVP_F_EVP_PKEY_GET1_DH, EVP_R_EXPECTING_A_DH_KEY);
419 return NULL;
420 }
421 DH_up_ref(pkey->pkey.dh);
422 return pkey->pkey.dh;
423}
424#endif
425
426int EVP_PKEY_type(int type)
427 {
428 switch (type)
429 {
430 case EVP_PKEY_RSA:
431 case EVP_PKEY_RSA2:
432 return(EVP_PKEY_RSA);
433 case EVP_PKEY_DSA:
434 case EVP_PKEY_DSA1:
435 case EVP_PKEY_DSA2:
436 case EVP_PKEY_DSA3:
437 case EVP_PKEY_DSA4:
438 return(EVP_PKEY_DSA);
439 case EVP_PKEY_DH:
440 return(EVP_PKEY_DH);
441 case EVP_PKEY_EC:
442 return(EVP_PKEY_EC);
443 default:
444 return(NID_undef);
445 }
446 }
447
448void EVP_PKEY_free(EVP_PKEY *x)
449 {
450 int i;
451
452 if (x == NULL) return;
453
454 i=CRYPTO_add(&x->references,-1,CRYPTO_LOCK_EVP_PKEY);
455#ifdef REF_PRINT
456 REF_PRINT("EVP_PKEY",x);
457#endif
458 if (i > 0) return;
459#ifdef REF_CHECK
460 if (i < 0)
461 {
462 fprintf(stderr,"EVP_PKEY_free, bad reference count\n");
463 abort();
464 }
465#endif
466 EVP_PKEY_free_it(x);
467 if (x->attributes)
468 sk_X509_ATTRIBUTE_pop_free(x->attributes, X509_ATTRIBUTE_free);
469 OPENSSL_free(x);
470 }
471
472static void EVP_PKEY_free_it(EVP_PKEY *x)
473 {
474 switch (x->type)
475 {
476#ifndef OPENSSL_NO_RSA
477 case EVP_PKEY_RSA:
478 case EVP_PKEY_RSA2:
479 RSA_free(x->pkey.rsa);
480 break;
481#endif
482#ifndef OPENSSL_NO_DSA
483 case EVP_PKEY_DSA:
484 case EVP_PKEY_DSA2:
485 case EVP_PKEY_DSA3:
486 case EVP_PKEY_DSA4:
487 DSA_free(x->pkey.dsa);
488 break;
489#endif
490#ifndef OPENSSL_NO_EC
491 case EVP_PKEY_EC:
492 EC_KEY_free(x->pkey.ec);
493 break;
494#endif
495#ifndef OPENSSL_NO_DH
496 case EVP_PKEY_DH:
497 DH_free(x->pkey.dh);
498 break;
499#endif
500 }
501 }
502
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