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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);
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
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