p_lib.c revision 109998 
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);
67
68int EVP_PKEY_bits(EVP_PKEY *pkey)
69	{
70#ifndef OPENSSL_NO_RSA
71	if (pkey->type == EVP_PKEY_RSA)
72		return(BN_num_bits(pkey->pkey.rsa->n));
73	else
74#endif
75#ifndef OPENSSL_NO_DSA
76		if (pkey->type == EVP_PKEY_DSA)
77		return(BN_num_bits(pkey->pkey.dsa->p));
78#endif
79	return(0);
80	}
81
82int EVP_PKEY_size(EVP_PKEY *pkey)
83	{
84	if (pkey == NULL)
85		return(0);
86#ifndef OPENSSL_NO_RSA
87	if (pkey->type == EVP_PKEY_RSA)
88		return(RSA_size(pkey->pkey.rsa));
89	else
90#endif
91#ifndef OPENSSL_NO_DSA
92		if (pkey->type == EVP_PKEY_DSA)
93		return(DSA_size(pkey->pkey.dsa));
94#endif
95	return(0);
96	}
97
98int EVP_PKEY_save_parameters(EVP_PKEY *pkey, int mode)
99	{
100#ifndef OPENSSL_NO_DSA
101	if (pkey->type == EVP_PKEY_DSA)
102		{
103		int ret=pkey->save_parameters;
104
105		if (mode >= 0)
106			pkey->save_parameters=mode;
107		return(ret);
108		}
109#endif
110	return(0);
111	}
112
113int EVP_PKEY_copy_parameters(EVP_PKEY *to, EVP_PKEY *from)
114	{
115	if (to->type != from->type)
116		{
117		EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS,EVP_R_DIFFERENT_KEY_TYPES);
118		goto err;
119		}
120
121	if (EVP_PKEY_missing_parameters(from))
122		{
123		EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS,EVP_R_MISSING_PARAMETERS);
124		goto err;
125		}
126#ifndef OPENSSL_NO_DSA
127	if (to->type == EVP_PKEY_DSA)
128		{
129		BIGNUM *a;
130
131		if ((a=BN_dup(from->pkey.dsa->p)) == NULL) goto err;
132		if (to->pkey.dsa->p != NULL) BN_free(to->pkey.dsa->p);
133		to->pkey.dsa->p=a;
134
135		if ((a=BN_dup(from->pkey.dsa->q)) == NULL) goto err;
136		if (to->pkey.dsa->q != NULL) BN_free(to->pkey.dsa->q);
137		to->pkey.dsa->q=a;
138
139		if ((a=BN_dup(from->pkey.dsa->g)) == NULL) goto err;
140		if (to->pkey.dsa->g != NULL) BN_free(to->pkey.dsa->g);
141		to->pkey.dsa->g=a;
142		}
143#endif
144	return(1);
145err:
146	return(0);
147	}
148
149int EVP_PKEY_missing_parameters(EVP_PKEY *pkey)
150	{
151#ifndef OPENSSL_NO_DSA
152	if (pkey->type == EVP_PKEY_DSA)
153		{
154		DSA *dsa;
155
156		dsa=pkey->pkey.dsa;
157		if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))
158			return(1);
159		}
160#endif
161	return(0);
162	}
163
164int EVP_PKEY_cmp_parameters(EVP_PKEY *a, EVP_PKEY *b)
165	{
166#ifndef OPENSSL_NO_DSA
167	if ((a->type == EVP_PKEY_DSA) && (b->type == EVP_PKEY_DSA))
168		{
169		if (	BN_cmp(a->pkey.dsa->p,b->pkey.dsa->p) ||
170			BN_cmp(a->pkey.dsa->q,b->pkey.dsa->q) ||
171			BN_cmp(a->pkey.dsa->g,b->pkey.dsa->g))
172			return(0);
173		else
174			return(1);
175		}
176#endif
177	return(-1);
178	}
179
180EVP_PKEY *EVP_PKEY_new(void)
181	{
182	EVP_PKEY *ret;
183
184	ret=(EVP_PKEY *)OPENSSL_malloc(sizeof(EVP_PKEY));
185	if (ret == NULL)
186		{
187		EVPerr(EVP_F_EVP_PKEY_NEW,ERR_R_MALLOC_FAILURE);
188		return(NULL);
189		}
190	ret->type=EVP_PKEY_NONE;
191	ret->references=1;
192	ret->pkey.ptr=NULL;
193	ret->attributes=NULL;
194	ret->save_parameters=1;
195	return(ret);
196	}
197
198int EVP_PKEY_assign(EVP_PKEY *pkey, int type, char *key)
199	{
200	if (pkey == NULL) return(0);
201	if (pkey->pkey.ptr != NULL)
202		EVP_PKEY_free_it(pkey);
203	pkey->type=EVP_PKEY_type(type);
204	pkey->save_type=type;
205	pkey->pkey.ptr=key;
206	return(key != NULL);
207	}
208
209#ifndef OPENSSL_NO_RSA
210int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key)
211{
212	int ret = EVP_PKEY_assign_RSA(pkey, key);
213	if(ret)
214		RSA_up_ref(key);
215	return ret;
216}
217
218RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey)
219	{
220	if(pkey->type != EVP_PKEY_RSA) {
221		EVPerr(EVP_F_EVP_PKEY_GET1_RSA, EVP_R_EXPECTING_AN_RSA_KEY);
222		return NULL;
223	}
224	RSA_up_ref(pkey->pkey.rsa);
225	return pkey->pkey.rsa;
226}
227#endif
228
229#ifndef OPENSSL_NO_DSA
230int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key)
231{
232	int ret = EVP_PKEY_assign_DSA(pkey, key);
233	if(ret)
234		DSA_up_ref(key);
235	return ret;
236}
237
238DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey)
239	{
240	if(pkey->type != EVP_PKEY_DSA) {
241		EVPerr(EVP_F_EVP_PKEY_GET1_DSA, EVP_R_EXPECTING_A_DSA_KEY);
242		return NULL;
243	}
244	DSA_up_ref(pkey->pkey.dsa);
245	return pkey->pkey.dsa;
246}
247#endif
248
249#ifndef OPENSSL_NO_DH
250
251int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *key)
252{
253	int ret = EVP_PKEY_assign_DH(pkey, key);
254	if(ret)
255		DH_up_ref(key);
256	return ret;
257}
258
259DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey)
260	{
261	if(pkey->type != EVP_PKEY_DH) {
262		EVPerr(EVP_F_EVP_PKEY_GET1_DH, EVP_R_EXPECTING_A_DH_KEY);
263		return NULL;
264	}
265	DH_up_ref(pkey->pkey.dh);
266	return pkey->pkey.dh;
267}
268#endif
269
270int EVP_PKEY_type(int type)
271	{
272	switch (type)
273		{
274	case EVP_PKEY_RSA:
275	case EVP_PKEY_RSA2:
276		return(EVP_PKEY_RSA);
277	case EVP_PKEY_DSA:
278	case EVP_PKEY_DSA1:
279	case EVP_PKEY_DSA2:
280	case EVP_PKEY_DSA3:
281	case EVP_PKEY_DSA4:
282		return(EVP_PKEY_DSA);
283	case EVP_PKEY_DH:
284		return(EVP_PKEY_DH);
285	default:
286		return(NID_undef);
287		}
288	}
289
290void EVP_PKEY_free(EVP_PKEY *x)
291	{
292	int i;
293
294	if (x == NULL) return;
295
296	i=CRYPTO_add(&x->references,-1,CRYPTO_LOCK_EVP_PKEY);
297#ifdef REF_PRINT
298	REF_PRINT("EVP_PKEY",x);
299#endif
300	if (i > 0) return;
301#ifdef REF_CHECK
302	if (i < 0)
303		{
304		fprintf(stderr,"EVP_PKEY_free, bad reference count\n");
305		abort();
306		}
307#endif
308	EVP_PKEY_free_it(x);
309	OPENSSL_free(x);
310	}
311
312static void EVP_PKEY_free_it(EVP_PKEY *x)
313	{
314	switch (x->type)
315		{
316#ifndef OPENSSL_NO_RSA
317	case EVP_PKEY_RSA:
318	case EVP_PKEY_RSA2:
319		RSA_free(x->pkey.rsa);
320		break;
321#endif
322#ifndef OPENSSL_NO_DSA
323	case EVP_PKEY_DSA:
324	case EVP_PKEY_DSA2:
325	case EVP_PKEY_DSA3:
326	case EVP_PKEY_DSA4:
327		DSA_free(x->pkey.dsa);
328		break;
329#endif
330#ifndef OPENSSL_NO_DH
331	case EVP_PKEY_DH:
332		DH_free(x->pkey.dh);
333		break;
334#endif
335		}
336	}
337
338