xref: /freebsd/crypto/openssl/crypto/evp/p_lib.c (revision 39beb93c) 
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 
77 static void EVP_PKEY_free_it(EVP_PKEY *x);
78 
79 int 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 
118 int 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 
139 int 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 
164 int 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);
207 err:
208 	return(0);
209 	}
210 
211 int 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 
234 int 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 
261 int 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 
313 EVP_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 
331 int 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
343 int 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 
351 RSA *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
363 int 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 
371 DSA *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 
384 int 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 
392 EC_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 
407 int 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 
415 DH *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 
426 int 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 
448 void 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 
472 static 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 
503