p_lib.c revision 59191 
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/objects.h>
62#include <openssl/evp.h>
63#include <openssl/asn1_mac.h>
64#include <openssl/x509.h>
65
66static void EVP_PKEY_free_it(EVP_PKEY *x);
67int EVP_PKEY_bits(EVP_PKEY *pkey)
68	{
69#ifndef NO_RSA
70	if (pkey->type == EVP_PKEY_RSA)
71		return(BN_num_bits(pkey->pkey.rsa->n));
72	else
73#endif
74#ifndef NO_DSA
75		if (pkey->type == EVP_PKEY_DSA)
76		return(BN_num_bits(pkey->pkey.dsa->p));
77#endif
78	return(0);
79	}
80
81int EVP_PKEY_size(EVP_PKEY *pkey)
82	{
83	if (pkey == NULL)
84		return(0);
85#ifndef NO_RSA
86	if (pkey->type == EVP_PKEY_RSA)
87		return(RSA_size(pkey->pkey.rsa));
88	else
89#endif
90#ifndef NO_DSA
91		if (pkey->type == EVP_PKEY_DSA)
92		return(DSA_size(pkey->pkey.dsa));
93#endif
94	return(0);
95	}
96
97int EVP_PKEY_save_parameters(EVP_PKEY *pkey, int mode)
98	{
99#ifndef NO_DSA
100	if (pkey->type == EVP_PKEY_DSA)
101		{
102		int ret=pkey->save_parameters=mode;
103
104		if (mode >= 0)
105			pkey->save_parameters=mode;
106		return(ret);
107		}
108#endif
109	return(0);
110	}
111
112int EVP_PKEY_copy_parameters(EVP_PKEY *to, EVP_PKEY *from)
113	{
114	if (to->type != from->type)
115		{
116		EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS,EVP_R_DIFFERENT_KEY_TYPES);
117		goto err;
118		}
119
120	if (EVP_PKEY_missing_parameters(from))
121		{
122		EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS,EVP_R_MISSING_PARAMETERS);
123		goto err;
124		}
125#ifndef NO_DSA
126	if (to->type == EVP_PKEY_DSA)
127		{
128		BIGNUM *a;
129
130		if ((a=BN_dup(from->pkey.dsa->p)) == NULL) goto err;
131		if (to->pkey.dsa->p != NULL) BN_free(to->pkey.dsa->p);
132		to->pkey.dsa->p=a;
133
134		if ((a=BN_dup(from->pkey.dsa->q)) == NULL) goto err;
135		if (to->pkey.dsa->q != NULL) BN_free(to->pkey.dsa->q);
136		to->pkey.dsa->q=a;
137
138		if ((a=BN_dup(from->pkey.dsa->g)) == NULL) goto err;
139		if (to->pkey.dsa->g != NULL) BN_free(to->pkey.dsa->g);
140		to->pkey.dsa->g=a;
141		}
142#endif
143	return(1);
144err:
145	return(0);
146	}
147
148int EVP_PKEY_missing_parameters(EVP_PKEY *pkey)
149	{
150#ifndef NO_DSA
151	if (pkey->type == EVP_PKEY_DSA)
152		{
153		DSA *dsa;
154
155		dsa=pkey->pkey.dsa;
156		if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))
157			return(1);
158		}
159#endif
160	return(0);
161	}
162
163int EVP_PKEY_cmp_parameters(EVP_PKEY *a, EVP_PKEY *b)
164	{
165#ifndef NO_DSA
166	if ((a->type == EVP_PKEY_DSA) && (b->type == EVP_PKEY_DSA))
167		{
168		if (	BN_cmp(a->pkey.dsa->p,b->pkey.dsa->p) ||
169			BN_cmp(a->pkey.dsa->q,b->pkey.dsa->q) ||
170			BN_cmp(a->pkey.dsa->g,b->pkey.dsa->g))
171			return(0);
172		else
173			return(1);
174		}
175#endif
176	return(-1);
177	}
178
179EVP_PKEY *EVP_PKEY_new(void)
180	{
181	EVP_PKEY *ret;
182
183	ret=(EVP_PKEY *)Malloc(sizeof(EVP_PKEY));
184	if (ret == NULL)
185		{
186		EVPerr(EVP_F_EVP_PKEY_NEW,ERR_R_MALLOC_FAILURE);
187		return(NULL);
188		}
189	ret->type=EVP_PKEY_NONE;
190	ret->references=1;
191	ret->pkey.ptr=NULL;
192	ret->attributes=NULL;
193	ret->save_parameters=1;
194	return(ret);
195	}
196
197int EVP_PKEY_assign(EVP_PKEY *pkey, int type, char *key)
198	{
199	if (pkey == NULL) return(0);
200	if (pkey->pkey.ptr != NULL)
201		EVP_PKEY_free_it(pkey);
202	pkey->type=EVP_PKEY_type(type);
203	pkey->save_type=type;
204	pkey->pkey.ptr=key;
205	return(key != NULL);
206	}
207
208#ifndef NO_RSA
209int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key)
210{
211	int ret = EVP_PKEY_assign_RSA(pkey, key);
212	if(ret) CRYPTO_add(&key->references, 1, CRYPTO_LOCK_RSA);
213	return ret;
214}
215
216RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey)
217	{
218	if(pkey->type != EVP_PKEY_RSA) {
219		EVPerr(EVP_F_EVP_PKEY_GET1_RSA, EVP_R_EXPECTING_AN_RSA_KEY);
220		return NULL;
221	}
222	CRYPTO_add(&pkey->pkey.rsa->references, 1, CRYPTO_LOCK_RSA);
223	return pkey->pkey.rsa;
224}
225#endif
226
227#ifndef NO_DSA
228int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key)
229{
230	int ret = EVP_PKEY_assign_DSA(pkey, key);
231	if(ret) CRYPTO_add(&key->references, 1, CRYPTO_LOCK_DSA);
232	return ret;
233}
234
235DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey)
236	{
237	if(pkey->type != EVP_PKEY_DSA) {
238		EVPerr(EVP_F_EVP_PKEY_GET1_DSA, EVP_R_EXPECTING_A_DSA_KEY);
239		return NULL;
240	}
241	CRYPTO_add(&pkey->pkey.dsa->references, 1, CRYPTO_LOCK_DSA);
242	return pkey->pkey.dsa;
243}
244#endif
245
246#ifndef NO_DH
247
248int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *key)
249{
250	int ret = EVP_PKEY_assign_DH(pkey, key);
251	if(ret) CRYPTO_add(&key->references, 1, CRYPTO_LOCK_DH);
252	return ret;
253}
254
255DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey)
256	{
257	if(pkey->type != EVP_PKEY_DH) {
258		EVPerr(EVP_F_EVP_PKEY_GET1_DH, EVP_R_EXPECTING_A_DH_KEY);
259		return NULL;
260	}
261	CRYPTO_add(&pkey->pkey.dh->references, 1, CRYPTO_LOCK_DH);
262	return pkey->pkey.dh;
263}
264#endif
265
266int EVP_PKEY_type(int type)
267	{
268	switch (type)
269		{
270	case EVP_PKEY_RSA:
271	case EVP_PKEY_RSA2:
272		return(EVP_PKEY_RSA);
273	case EVP_PKEY_DSA:
274	case EVP_PKEY_DSA1:
275	case EVP_PKEY_DSA2:
276	case EVP_PKEY_DSA3:
277	case EVP_PKEY_DSA4:
278		return(EVP_PKEY_DSA);
279	case EVP_PKEY_DH:
280		return(EVP_PKEY_DH);
281	default:
282		return(NID_undef);
283		}
284	}
285
286void EVP_PKEY_free(EVP_PKEY *x)
287	{
288	int i;
289
290	if (x == NULL) return;
291
292	i=CRYPTO_add(&x->references,-1,CRYPTO_LOCK_EVP_PKEY);
293#ifdef REF_PRINT
294	REF_PRINT("EVP_PKEY",x);
295#endif
296	if (i > 0) return;
297#ifdef REF_CHECK
298	if (i < 0)
299		{
300		fprintf(stderr,"EVP_PKEY_free, bad reference count\n");
301		abort();
302		}
303#endif
304	EVP_PKEY_free_it(x);
305	Free(x);
306	}
307
308static void EVP_PKEY_free_it(EVP_PKEY *x)
309	{
310	switch (x->type)
311		{
312#ifndef NO_RSA
313	case EVP_PKEY_RSA:
314	case EVP_PKEY_RSA2:
315		RSA_free(x->pkey.rsa);
316		break;
317#endif
318#ifndef NO_DSA
319	case EVP_PKEY_DSA:
320	case EVP_PKEY_DSA2:
321	case EVP_PKEY_DSA3:
322	case EVP_PKEY_DSA4:
323		DSA_free(x->pkey.dsa);
324		break;
325#endif
326#ifndef NO_DH
327	case EVP_PKEY_DH:
328		DH_free(x->pkey.dh);
329		break;
330#endif
331		}
332	}
333
334