Add functionality to help making self-signed certificate.
[openssl.git] / crypto / evp / p_lib.c
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
68 static void EVP_PKEY_free_it(EVP_PKEY *x);
69
70 int EVP_PKEY_bits(EVP_PKEY *pkey)
71         {
72         if (0)
73                 return 0;
74 #ifndef OPENSSL_NO_RSA
75         else if (pkey->type == EVP_PKEY_RSA)
76                 return(BN_num_bits(pkey->pkey.rsa->n));
77 #endif
78 #ifndef OPENSSL_NO_DSA
79         else if (pkey->type == EVP_PKEY_DSA)
80                 return(BN_num_bits(pkey->pkey.dsa->p));
81 #endif
82 #ifndef OPENSSL_NO_EC
83         else if (pkey->type == EVP_PKEY_EC)
84                 {
85                 BIGNUM *order = BN_new();
86                 int ret;
87
88                 if (!order)
89                         {
90                         ERR_clear_error();
91                         return 0;
92                         }
93                 if (!EC_GROUP_get_order(pkey->pkey.eckey->group, order, NULL))
94                         {
95                         ERR_clear_error();
96                         return 0;
97                         }
98
99                 ret = BN_num_bits(order);
100                 BN_free(order);
101                 return ret;
102                 }
103 #endif
104         return(0);
105         }
106
107 int EVP_PKEY_size(EVP_PKEY *pkey)
108         {
109         if (pkey == NULL)
110                 return(0);
111 #ifndef OPENSSL_NO_RSA
112         if (pkey->type == EVP_PKEY_RSA)
113                 return(RSA_size(pkey->pkey.rsa));
114         else
115 #endif
116 #ifndef OPENSSL_NO_DSA
117                 if (pkey->type == EVP_PKEY_DSA)
118                 return(DSA_size(pkey->pkey.dsa));
119 #endif
120 #ifndef OPENSSL_NO_ECDSA
121                 if (pkey->type == EVP_PKEY_EC)
122                 return(ECDSA_size(pkey->pkey.eckey));
123 #endif
124
125         return(0);
126         }
127
128 int EVP_PKEY_save_parameters(EVP_PKEY *pkey, int mode)
129         {
130 #ifndef OPENSSL_NO_DSA
131         if (pkey->type == EVP_PKEY_DSA)
132                 {
133                 int ret=pkey->save_parameters;
134
135                 if (mode >= 0)
136                         pkey->save_parameters=mode;
137                 return(ret);
138                 }
139 #endif
140 #ifndef OPENSSL_NO_EC
141         if (pkey->type == EVP_PKEY_EC)
142                 {
143                 int ret = pkey->save_parameters;
144
145                 if (mode >= 0)
146                         pkey->save_parameters = mode;
147                 return(ret);
148                 }
149 #endif
150         return(0);
151         }
152
153 int EVP_PKEY_copy_parameters(EVP_PKEY *to, EVP_PKEY *from)
154         {
155         if (to->type != from->type)
156                 {
157                 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS,EVP_R_DIFFERENT_KEY_TYPES);
158                 goto err;
159                 }
160
161         if (EVP_PKEY_missing_parameters(from))
162                 {
163                 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS,EVP_R_MISSING_PARAMETERS);
164                 goto err;
165                 }
166 #ifndef OPENSSL_NO_DSA
167         if (to->type == EVP_PKEY_DSA)
168                 {
169                 BIGNUM *a;
170
171                 if ((a=BN_dup(from->pkey.dsa->p)) == NULL) goto err;
172                 if (to->pkey.dsa->p != NULL) BN_free(to->pkey.dsa->p);
173                 to->pkey.dsa->p=a;
174
175                 if ((a=BN_dup(from->pkey.dsa->q)) == NULL) goto err;
176                 if (to->pkey.dsa->q != NULL) BN_free(to->pkey.dsa->q);
177                 to->pkey.dsa->q=a;
178
179                 if ((a=BN_dup(from->pkey.dsa->g)) == NULL) goto err;
180                 if (to->pkey.dsa->g != NULL) BN_free(to->pkey.dsa->g);
181                 to->pkey.dsa->g=a;
182                 }
183 #endif
184 #ifndef OPENSSL_NO_EC
185         if (to->type == EVP_PKEY_EC)
186                 {
187                 if (to->pkey.eckey->group != NULL)
188                         EC_GROUP_free(to->pkey.eckey->group);
189                 if ((to->pkey.eckey->group = EC_GROUP_new(
190                         EC_GROUP_method_of(from->pkey.eckey->group))) == NULL) 
191                         goto err;
192                 if (!EC_GROUP_copy(to->pkey.eckey->group,
193                         from->pkey.eckey->group)) goto err;
194                 }
195 #endif
196         return(1);
197 err:
198         return(0);
199         }
200
201 int EVP_PKEY_missing_parameters(EVP_PKEY *pkey)
202         {
203 #ifndef OPENSSL_NO_DSA
204         if (pkey->type == EVP_PKEY_DSA)
205                 {
206                 DSA *dsa;
207
208                 dsa=pkey->pkey.dsa;
209                 if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))
210                         return(1);
211                 }
212 #endif
213 #ifndef OPENSSL_NO_EC
214         if (pkey->type == EVP_PKEY_EC)
215                 {
216                 if (pkey->pkey.eckey->group == NULL)
217                         return(1);
218                 }
219 #endif
220
221         return(0);
222         }
223
224 int EVP_PKEY_cmp_parameters(EVP_PKEY *a, EVP_PKEY *b)
225         {
226 #ifndef OPENSSL_NO_DSA
227         if ((a->type == EVP_PKEY_DSA) && (b->type == EVP_PKEY_DSA))
228                 {
229                 if (    BN_cmp(a->pkey.dsa->p,b->pkey.dsa->p) ||
230                         BN_cmp(a->pkey.dsa->q,b->pkey.dsa->q) ||
231                         BN_cmp(a->pkey.dsa->g,b->pkey.dsa->g))
232                         return(0);
233                 else
234                         return(1);
235                 }
236 #endif
237         return(-1);
238         }
239
240 int EVP_PKEY_cmp(EVP_PKEY *a, EVP_PKEY *b)
241         {
242         if (a->type != b->type)
243                 return -1;
244
245         switch (a->type)
246                 {
247 #ifndef OPENSSL_NO_RSA
248         case EVP_PKEY_RSA:
249                 if (BN_cmp(b->pkey.rsa->n,a->pkey.rsa->n) != 0
250                         || BN_cmp(b->pkey.rsa->e,a->pkey.rsa->e) != 0)
251                         return 0;
252                 break;
253 #endif
254 #ifndef OPENSSL_NO_DSA
255         case EVP_PKEY_DSA:
256                 if (BN_cmp(b->pkey.dsa->pub_key,a->pkey.dsa->pub_key) != 0)
257                         return 0;
258                 break;
259 #endif
260 #ifndef OPENSSL_NO_EC
261         case EVP_PKEY_EC:
262                 {
263                 int  r = EC_POINT_cmp(b->pkey.eckey->group, 
264                         b->pkey.eckey->pub_key,a->pkey.eckey->pub_key,NULL);
265                 if (r != 0)
266                         {
267                         if (r == 1)
268                                 return 0;
269                         else
270                                 return -2;
271                         }
272                 }
273                 break;
274 #endif
275 #ifndef OPENSSL_NO_DH
276         case EVP_PKEY_DH:
277                 return -2;
278 #endif
279         default:
280                 return -2;
281                 }
282
283         return 1;
284         }
285
286 EVP_PKEY *EVP_PKEY_new(void)
287         {
288         EVP_PKEY *ret;
289
290         ret=(EVP_PKEY *)OPENSSL_malloc(sizeof(EVP_PKEY));
291         if (ret == NULL)
292                 {
293                 EVPerr(EVP_F_EVP_PKEY_NEW,ERR_R_MALLOC_FAILURE);
294                 return(NULL);
295                 }
296         ret->type=EVP_PKEY_NONE;
297         ret->references=1;
298         ret->pkey.ptr=NULL;
299         ret->attributes=NULL;
300         ret->save_parameters=1;
301         return(ret);
302         }
303
304 int EVP_PKEY_assign(EVP_PKEY *pkey, int type, char *key)
305         {
306         if (pkey == NULL) return(0);
307         if (pkey->pkey.ptr != NULL)
308                 EVP_PKEY_free_it(pkey);
309         pkey->type=EVP_PKEY_type(type);
310         pkey->save_type=type;
311         pkey->pkey.ptr=key;
312         return(key != NULL);
313         }
314
315 #ifndef OPENSSL_NO_RSA
316 int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key)
317 {
318         int ret = EVP_PKEY_assign_RSA(pkey, key);
319         if(ret)
320                 RSA_up_ref(key);
321         return ret;
322 }
323
324 RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey)
325         {
326         if(pkey->type != EVP_PKEY_RSA) {
327                 EVPerr(EVP_F_EVP_PKEY_GET1_RSA, EVP_R_EXPECTING_AN_RSA_KEY);
328                 return NULL;
329         }
330         RSA_up_ref(pkey->pkey.rsa);
331         return pkey->pkey.rsa;
332 }
333 #endif
334
335 #ifndef OPENSSL_NO_DSA
336 int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key)
337 {
338         int ret = EVP_PKEY_assign_DSA(pkey, key);
339         if(ret)
340                 DSA_up_ref(key);
341         return ret;
342 }
343
344 DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey)
345         {
346         if(pkey->type != EVP_PKEY_DSA) {
347                 EVPerr(EVP_F_EVP_PKEY_GET1_DSA, EVP_R_EXPECTING_A_DSA_KEY);
348                 return NULL;
349         }
350         DSA_up_ref(pkey->pkey.dsa);
351         return pkey->pkey.dsa;
352 }
353 #endif
354
355 #ifndef OPENSSL_NO_EC
356
357 int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key)
358 {
359         int ret = EVP_PKEY_assign_EC_KEY(pkey,key);
360         if (ret) CRYPTO_add(&key->references, 1, CRYPTO_LOCK_EC);
361                 return ret;
362 }
363
364 EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey)
365 {
366         if (pkey->type != EVP_PKEY_EC)
367         {
368                 EVPerr(EVP_F_EVP_PKEY_GET1_EC_KEY, EVP_R_EXPECTING_A_EC_KEY);
369                 return NULL;
370         }
371         CRYPTO_add(&pkey->pkey.eckey->references, 1, CRYPTO_LOCK_EC);
372         return pkey->pkey.eckey;
373 }
374 #endif
375
376
377 #ifndef OPENSSL_NO_DH
378
379 int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *key)
380 {
381         int ret = EVP_PKEY_assign_DH(pkey, key);
382         if(ret)
383                 DH_up_ref(key);
384         return ret;
385 }
386
387 DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey)
388         {
389         if(pkey->type != EVP_PKEY_DH) {
390                 EVPerr(EVP_F_EVP_PKEY_GET1_DH, EVP_R_EXPECTING_A_DH_KEY);
391                 return NULL;
392         }
393         DH_up_ref(pkey->pkey.dh);
394         return pkey->pkey.dh;
395 }
396 #endif
397
398 int EVP_PKEY_type(int type)
399         {
400         switch (type)
401                 {
402         case EVP_PKEY_RSA:
403         case EVP_PKEY_RSA2:
404                 return(EVP_PKEY_RSA);
405         case EVP_PKEY_DSA:
406         case EVP_PKEY_DSA1:
407         case EVP_PKEY_DSA2:
408         case EVP_PKEY_DSA3:
409         case EVP_PKEY_DSA4:
410                 return(EVP_PKEY_DSA);
411         case EVP_PKEY_DH:
412                 return(EVP_PKEY_DH);
413         case EVP_PKEY_EC:
414                 return(EVP_PKEY_EC);
415         default:
416                 return(NID_undef);
417                 }
418         }
419
420 void EVP_PKEY_free(EVP_PKEY *x)
421         {
422         int i;
423
424         if (x == NULL) return;
425
426         i=CRYPTO_add(&x->references,-1,CRYPTO_LOCK_EVP_PKEY);
427 #ifdef REF_PRINT
428         REF_PRINT("EVP_PKEY",x);
429 #endif
430         if (i > 0) return;
431 #ifdef REF_CHECK
432         if (i < 0)
433                 {
434                 fprintf(stderr,"EVP_PKEY_free, bad reference count\n");
435                 abort();
436                 }
437 #endif
438         EVP_PKEY_free_it(x);
439         OPENSSL_free(x);
440         }
441
442 static void EVP_PKEY_free_it(EVP_PKEY *x)
443         {
444         switch (x->type)
445                 {
446 #ifndef OPENSSL_NO_RSA
447         case EVP_PKEY_RSA:
448         case EVP_PKEY_RSA2:
449                 RSA_free(x->pkey.rsa);
450                 break;
451 #endif
452 #ifndef OPENSSL_NO_DSA
453         case EVP_PKEY_DSA:
454         case EVP_PKEY_DSA2:
455         case EVP_PKEY_DSA3:
456         case EVP_PKEY_DSA4:
457                 DSA_free(x->pkey.dsa);
458                 break;
459 #endif
460 #ifndef OPENSSL_NO_EC
461         case EVP_PKEY_EC:
462                 EC_KEY_free(x->pkey.eckey);
463                 break;
464 #endif
465 #ifndef OPENSSL_NO_DH
466         case EVP_PKEY_DH:
467                 DH_free(x->pkey.dh);
468                 break;
469 #endif
470                 }
471         }
472