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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 *)OPENSSL_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 OPENSSL_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
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