p_lib.c revision 55714 
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_PARMATERS);
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(1);
206	}
207
208int EVP_PKEY_type(int type)
209	{
210	switch (type)
211		{
212	case EVP_PKEY_RSA:
213	case EVP_PKEY_RSA2:
214		return(EVP_PKEY_RSA);
215	case EVP_PKEY_DSA:
216	case EVP_PKEY_DSA1:
217	case EVP_PKEY_DSA2:
218	case EVP_PKEY_DSA3:
219	case EVP_PKEY_DSA4:
220		return(EVP_PKEY_DSA);
221	case EVP_PKEY_DH:
222		return(EVP_PKEY_DH);
223	default:
224		return(NID_undef);
225		}
226	}
227
228void EVP_PKEY_free(EVP_PKEY *x)
229	{
230	int i;
231
232	if (x == NULL) return;
233
234	i=CRYPTO_add(&x->references,-1,CRYPTO_LOCK_EVP_PKEY);
235#ifdef REF_PRINT
236	REF_PRINT("EVP_PKEY",x);
237#endif
238	if (i > 0) return;
239#ifdef REF_CHECK
240	if (i < 0)
241		{
242		fprintf(stderr,"EVP_PKEY_free, bad reference count\n");
243		abort();
244		}
245#endif
246	EVP_PKEY_free_it(x);
247	Free((char *)x);
248	}
249
250static void EVP_PKEY_free_it(EVP_PKEY *x)
251	{
252	switch (x->type)
253		{
254#ifndef NO_RSA
255	case EVP_PKEY_RSA:
256	case EVP_PKEY_RSA2:
257		RSA_free(x->pkey.rsa);
258		break;
259#endif
260#ifndef NO_DSA
261	case EVP_PKEY_DSA:
262	case EVP_PKEY_DSA2:
263	case EVP_PKEY_DSA3:
264	case EVP_PKEY_DSA4:
265		DSA_free(x->pkey.dsa);
266		break;
267#endif
268#ifndef NO_DH
269	case EVP_PKEY_DH:
270		DH_free(x->pkey.dh);
271		break;
272#endif
273		}
274	}
275
276