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/bn.h>
62 #include <openssl/err.h>
63 #include <openssl/objects.h>
64 #include <openssl/evp.h>
65 #include <openssl/asn1_mac.h>
66 #include <openssl/x509.h>
67 #ifndef OPENSSL_NO_RSA
68 #include <openssl/rsa.h>
69 #endif
70 #ifndef OPENSSL_NO_DSA
71 #include <openssl/dsa.h>
72 #endif
73 #ifndef OPENSSL_NO_DH
74 #include <openssl/dh.h>
75 #endif
76
77 #ifndef OPENSSL_NO_ENGINE
78 #include <openssl/engine.h>
79 #endif
80
81 #include "asn1_locl.h"
82
83 static void EVP_PKEY_free_it(EVP_PKEY *x);
84
85 int EVP_PKEY_bits(EVP_PKEY *pkey)
86 {
87 if (pkey && pkey->ameth && pkey->ameth->pkey_bits)
88 return pkey->ameth->pkey_bits(pkey);
89 return 0;
90 }
91
92 int EVP_PKEY_size(EVP_PKEY *pkey)
93 {
94 if (pkey && pkey->ameth && pkey->ameth->pkey_size)
95 return pkey->ameth->pkey_size(pkey);
96 return 0;
97 }
98
99 int EVP_PKEY_save_parameters(EVP_PKEY *pkey, int mode)
100 {
101 #ifndef OPENSSL_NO_DSA
102 if (pkey->type == EVP_PKEY_DSA)
103 {
104 int ret=pkey->save_parameters;
105
106 if (mode >= 0)
107 pkey->save_parameters=mode;
108 return(ret);
109 }
110 #endif
111 #ifndef OPENSSL_NO_EC
112 if (pkey->type == EVP_PKEY_EC)
113 {
114 int ret = pkey->save_parameters;
115
116 if (mode >= 0)
117 pkey->save_parameters = mode;
118 return(ret);
119 }
120 #endif
121 return(0);
122 }
123
124 int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
125 {
126 if (to->type != from->type)
127 {
128 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS,EVP_R_DIFFERENT_KEY_TYPES);
129 goto err;
130 }
131
132 if (EVP_PKEY_missing_parameters(from))
133 {
134 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS,EVP_R_MISSING_PARAMETERS);
135 goto err;
136 }
137 if (from->ameth && from->ameth->param_copy)
138 return from->ameth->param_copy(to, from);
139 err:
140 return 0;
141 }
142
143 int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey)
144 {
145 if (pkey->ameth && pkey->ameth->param_missing)
146 return pkey->ameth->param_missing(pkey);
147 return 0;
148 }
149
150 int EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
151 {
152 if (a->type != b->type)
153 return -1;
154 if (a->ameth && a->ameth->param_cmp)
155 return a->ameth->param_cmp(a, b);
156 return -2;
157 }
158
159 int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
160 {
161 if (a->type != b->type)
162 return -1;
163
164 if (a->ameth)
165 {
166 int ret;
167 /* Compare parameters if the algorithm has them */
168 if (a->ameth->param_cmp)
169 {
170 ret = a->ameth->param_cmp(a, b);
171 if (ret <= 0)
172 return ret;
173 }
174
175 if (a->ameth->pub_cmp)
176 return a->ameth->pub_cmp(a, b);
177 }
178
179 return -2;
180 }
181
182 EVP_PKEY *EVP_PKEY_new(void)
183 {
184 EVP_PKEY *ret;
185
186 ret=(EVP_PKEY *)OPENSSL_malloc(sizeof(EVP_PKEY));
187 if (ret == NULL)
188 {
189 EVPerr(EVP_F_EVP_PKEY_NEW,ERR_R_MALLOC_FAILURE);
190 return(NULL);
191 }
192 ret->type=EVP_PKEY_NONE;
193 ret->save_type=EVP_PKEY_NONE;
194 ret->references=1;
195 ret->ameth=NULL;
196 ret->engine=NULL;
197 ret->pkey.ptr=NULL;
198 ret->attributes=NULL;
199 ret->save_parameters=1;
200 return(ret);
201 }
202
203 /* Setup a public key ASN1 method and ENGINE from a NID or a string.
204 * If pkey is NULL just return 1 or 0 if the algorithm exists.
205 */
206
207 static int pkey_set_type(EVP_PKEY *pkey, int type, const char *str, int len)
208 {
209 const EVP_PKEY_ASN1_METHOD *ameth;
210 ENGINE *e = NULL;
211 if (pkey)
212 {
213 if (pkey->pkey.ptr)
214 EVP_PKEY_free_it(pkey);
215 /* If key type matches and a method exists then this
216 * lookup has succeeded once so just indicate success.
217 */
218 if ((type == pkey->save_type) && pkey->ameth)
219 return 1;
220 #ifndef OPENSSL_NO_ENGINE
221 /* If we have an ENGINE release it */
222 if (pkey->engine)
223 {
224 ENGINE_finish(pkey->engine);
225 pkey->engine = NULL;
226 }
227 #endif
228 }
229 if (str)
230 ameth = EVP_PKEY_asn1_find_str(&e, str, len);
231 else
232 ameth = EVP_PKEY_asn1_find(&e, type);
233 #ifndef OPENSSL_NO_ENGINE
234 if (!pkey && e)
235 ENGINE_finish(e);
236 #endif
237 if (!ameth)
238 {
239 EVPerr(EVP_F_PKEY_SET_TYPE, EVP_R_UNSUPPORTED_ALGORITHM);
240 return 0;
241 }
242 if (pkey)
243 {
244 pkey->ameth = ameth;
245 pkey->engine = e;
246
247 pkey->type = pkey->ameth->pkey_id;
248 pkey->save_type=type;
249 }
250 return 1;
251 }
252
253 int EVP_PKEY_set_type(EVP_PKEY *pkey, int type)
254 {
255 return pkey_set_type(pkey, type, NULL, -1);
256 }
257
258 int EVP_PKEY_set_type_str(EVP_PKEY *pkey, const char *str, int len)
259 {
260 return pkey_set_type(pkey, EVP_PKEY_NONE, str, len);
261 }
262
263 int EVP_PKEY_assign(EVP_PKEY *pkey, int type, void *key)
264 {
265 if (!EVP_PKEY_set_type(pkey, type))
266 return 0;
267 pkey->pkey.ptr=key;
268 return (key != NULL);
269 }
270
271 void *EVP_PKEY_get0(EVP_PKEY *pkey)
272 {
273 return pkey->pkey.ptr;
274 }
275
276 #ifndef OPENSSL_NO_RSA
277 int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key)
278 {
279 int ret = EVP_PKEY_assign_RSA(pkey, key);
280 if(ret)
281 RSA_up_ref(key);
282 return ret;
283 }
284
285 RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey)
286 {
287 if(pkey->type != EVP_PKEY_RSA) {
288 EVPerr(EVP_F_EVP_PKEY_GET1_RSA, EVP_R_EXPECTING_AN_RSA_KEY);
289 return NULL;
290 }
291 RSA_up_ref(pkey->pkey.rsa);
292 return pkey->pkey.rsa;
293 }
294 #endif
295
296 #ifndef OPENSSL_NO_DSA
297 int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key)
298 {
299 int ret = EVP_PKEY_assign_DSA(pkey, key);
300 if(ret)
301 DSA_up_ref(key);
302 return ret;
303 }
304
305 DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey)
306 {
307 if(pkey->type != EVP_PKEY_DSA) {
308 EVPerr(EVP_F_EVP_PKEY_GET1_DSA, EVP_R_EXPECTING_A_DSA_KEY);
309 return NULL;
310 }
311 DSA_up_ref(pkey->pkey.dsa);
312 return pkey->pkey.dsa;
313 }
314 #endif
315
316 #ifndef OPENSSL_NO_EC
317
318 int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key)
319 {
320 int ret = EVP_PKEY_assign_EC_KEY(pkey,key);
321 if (ret)
322 EC_KEY_up_ref(key);
323 return ret;
324 }
325
326 EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey)
327 {
328 if (pkey->type != EVP_PKEY_EC)
329 {
330 EVPerr(EVP_F_EVP_PKEY_GET1_EC_KEY, EVP_R_EXPECTING_A_EC_KEY);
331 return NULL;
332 }
333 EC_KEY_up_ref(pkey->pkey.ec);
334 return pkey->pkey.ec;
335 }
336 #endif
337
338
339 #ifndef OPENSSL_NO_DH
340
341 int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *key)
342 {
343 int ret = EVP_PKEY_assign_DH(pkey, key);
344 if(ret)
345 DH_up_ref(key);
346 return ret;
347 }
348
349 DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey)
350 {
351 if(pkey->type != EVP_PKEY_DH) {
352 EVPerr(EVP_F_EVP_PKEY_GET1_DH, EVP_R_EXPECTING_A_DH_KEY);
353 return NULL;
354 }
355 DH_up_ref(pkey->pkey.dh);
356 return pkey->pkey.dh;
357 }
358 #endif
359
360 int EVP_PKEY_type(int type)
361 {
362 int ret;
363 const EVP_PKEY_ASN1_METHOD *ameth;
364 ENGINE *e;
365 ameth = EVP_PKEY_asn1_find(&e, type);
366 if (ameth)
367 ret = ameth->pkey_id;
368 else
369 ret = NID_undef;
370 #ifndef OPENSSL_NO_ENGINE
371 if (e)
372 ENGINE_finish(e);
373 #endif
374 return ret;
375 }
376
377 int EVP_PKEY_id(const EVP_PKEY *pkey)
378 {
379 return pkey->type;
380 }
381
382 int EVP_PKEY_base_id(const EVP_PKEY *pkey)
383 {
384 return EVP_PKEY_type(pkey->type);
385 }
386
387 void EVP_PKEY_free(EVP_PKEY *x)
388 {
389 int i;
390
391 if (x == NULL) return;
392
393 i=CRYPTO_add(&x->references,-1,CRYPTO_LOCK_EVP_PKEY);
394 #ifdef REF_PRINT
395 REF_PRINT("EVP_PKEY",x);
396 #endif
397 if (i > 0) return;
398 #ifdef REF_CHECK
399 if (i < 0)
400 {
401 fprintf(stderr,"EVP_PKEY_free, bad reference count\n");
402 abort();
403 }
404 #endif
405 EVP_PKEY_free_it(x);
406 if (x->attributes)
407 sk_X509_ATTRIBUTE_pop_free(x->attributes, X509_ATTRIBUTE_free);
408 OPENSSL_free(x);
409 }
410
411 static void EVP_PKEY_free_it(EVP_PKEY *x)
412 {
413 if (x->ameth && x->ameth->pkey_free)
414 {
415 x->ameth->pkey_free(x);
416 x->pkey.ptr = NULL;
417 }
418 #ifndef OPENSSL_NO_ENGINE
419 if (x->engine)
420 {
421 ENGINE_finish(x->engine);
422 x->engine = NULL;
423 }
424 #endif
425 }
426
427 static int unsup_alg(BIO *out, const EVP_PKEY *pkey, int indent,
428 const char *kstr)
429 {
430 BIO_indent(out, indent, 128);
431 BIO_printf(out, "%s algorithm \"%s\" unsupported\n",
432 kstr, OBJ_nid2ln(pkey->type));
433 return 1;
434 }
435
436 int EVP_PKEY_print_public(BIO *out, const EVP_PKEY *pkey,
437 int indent, ASN1_PCTX *pctx)
438 {
439 if (pkey->ameth && pkey->ameth->pub_print)
440 return pkey->ameth->pub_print(out, pkey, indent, pctx);
441
442 return unsup_alg(out, pkey, indent, "Public Key");
443 }
444
445 int EVP_PKEY_print_private(BIO *out, const EVP_PKEY *pkey,
446 int indent, ASN1_PCTX *pctx)
447 {
448 if (pkey->ameth && pkey->ameth->priv_print)
449 return pkey->ameth->priv_print(out, pkey, indent, pctx);
450
451 return unsup_alg(out, pkey, indent, "Private Key");
452 }
453
454 int EVP_PKEY_print_params(BIO *out, const EVP_PKEY *pkey,
455 int indent, ASN1_PCTX *pctx)
456 {
457 if (pkey->ameth && pkey->ameth->param_print)
458 return pkey->ameth->param_print(out, pkey, indent, pctx);
459 return unsup_alg(out, pkey, indent, "Parameters");
460 }
461
462 int EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int *pnid)
463 {
464 if (!pkey->ameth || !pkey->ameth->pkey_ctrl)
465 return -2;
466 return pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_DEFAULT_MD_NID,
467 0, pnid);
468 }