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
EVP_PKEY_bits(EVP_PKEY * pkey)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
EVP_PKEY_size(EVP_PKEY * pkey)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
EVP_PKEY_save_parameters(EVP_PKEY * pkey,int mode)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
EVP_PKEY_copy_parameters(EVP_PKEY * to,const EVP_PKEY * from)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
EVP_PKEY_missing_parameters(const EVP_PKEY * pkey)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
EVP_PKEY_cmp_parameters(const EVP_PKEY * a,const EVP_PKEY * b)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
EVP_PKEY_cmp(const EVP_PKEY * a,const EVP_PKEY * b)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
EVP_PKEY_new(void)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
EVP_PKEY_dup(EVP_PKEY * pkey)203 EVP_PKEY *EVP_PKEY_dup(EVP_PKEY *pkey)
204 {
205 CRYPTO_add(&pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
206 return pkey;
207 }
208
209 /* Setup a public key ASN1 method and ENGINE from a NID or a string.
210 * If pkey is NULL just return 1 or 0 if the algorithm exists.
211 */
212
pkey_set_type(EVP_PKEY * pkey,int type,const char * str,int len)213 static int pkey_set_type(EVP_PKEY *pkey, int type, const char *str, int len)
214 {
215 const EVP_PKEY_ASN1_METHOD *ameth;
216 ENGINE *e = NULL;
217 if (pkey)
218 {
219 if (pkey->pkey.ptr)
220 EVP_PKEY_free_it(pkey);
221 /* If key type matches and a method exists then this
222 * lookup has succeeded once so just indicate success.
223 */
224 if ((type == pkey->save_type) && pkey->ameth)
225 return 1;
226 #ifndef OPENSSL_NO_ENGINE
227 /* If we have an ENGINE release it */
228 if (pkey->engine)
229 {
230 ENGINE_finish(pkey->engine);
231 pkey->engine = NULL;
232 }
233 #endif
234 }
235 if (str)
236 ameth = EVP_PKEY_asn1_find_str(&e, str, len);
237 else
238 ameth = EVP_PKEY_asn1_find(&e, type);
239 #ifndef OPENSSL_NO_ENGINE
240 if (!pkey && e)
241 ENGINE_finish(e);
242 #endif
243 if (!ameth)
244 {
245 EVPerr(EVP_F_PKEY_SET_TYPE, EVP_R_UNSUPPORTED_ALGORITHM);
246 return 0;
247 }
248 if (pkey)
249 {
250 pkey->ameth = ameth;
251 pkey->engine = e;
252
253 pkey->type = pkey->ameth->pkey_id;
254 pkey->save_type=type;
255 }
256 return 1;
257 }
258
EVP_PKEY_set_type(EVP_PKEY * pkey,int type)259 int EVP_PKEY_set_type(EVP_PKEY *pkey, int type)
260 {
261 return pkey_set_type(pkey, type, NULL, -1);
262 }
263
EVP_PKEY_set_type_str(EVP_PKEY * pkey,const char * str,int len)264 int EVP_PKEY_set_type_str(EVP_PKEY *pkey, const char *str, int len)
265 {
266 return pkey_set_type(pkey, EVP_PKEY_NONE, str, len);
267 }
268
EVP_PKEY_assign(EVP_PKEY * pkey,int type,void * key)269 int EVP_PKEY_assign(EVP_PKEY *pkey, int type, void *key)
270 {
271 if (!EVP_PKEY_set_type(pkey, type))
272 return 0;
273 pkey->pkey.ptr=key;
274 return (key != NULL);
275 }
276
EVP_PKEY_get0(EVP_PKEY * pkey)277 void *EVP_PKEY_get0(EVP_PKEY *pkey)
278 {
279 return pkey->pkey.ptr;
280 }
281
282 #ifndef OPENSSL_NO_RSA
EVP_PKEY_set1_RSA(EVP_PKEY * pkey,RSA * key)283 int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key)
284 {
285 int ret = EVP_PKEY_assign_RSA(pkey, key);
286 if(ret)
287 RSA_up_ref(key);
288 return ret;
289 }
290
EVP_PKEY_get1_RSA(EVP_PKEY * pkey)291 RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey)
292 {
293 if(pkey->type != EVP_PKEY_RSA) {
294 EVPerr(EVP_F_EVP_PKEY_GET1_RSA, EVP_R_EXPECTING_AN_RSA_KEY);
295 return NULL;
296 }
297 RSA_up_ref(pkey->pkey.rsa);
298 return pkey->pkey.rsa;
299 }
300 #endif
301
302 #ifndef OPENSSL_NO_DSA
EVP_PKEY_set1_DSA(EVP_PKEY * pkey,DSA * key)303 int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key)
304 {
305 int ret = EVP_PKEY_assign_DSA(pkey, key);
306 if(ret)
307 DSA_up_ref(key);
308 return ret;
309 }
310
EVP_PKEY_get1_DSA(EVP_PKEY * pkey)311 DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey)
312 {
313 if(pkey->type != EVP_PKEY_DSA) {
314 EVPerr(EVP_F_EVP_PKEY_GET1_DSA, EVP_R_EXPECTING_A_DSA_KEY);
315 return NULL;
316 }
317 DSA_up_ref(pkey->pkey.dsa);
318 return pkey->pkey.dsa;
319 }
320 #endif
321
322 #ifndef OPENSSL_NO_EC
323
EVP_PKEY_set1_EC_KEY(EVP_PKEY * pkey,EC_KEY * key)324 int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key)
325 {
326 int ret = EVP_PKEY_assign_EC_KEY(pkey,key);
327 if (ret)
328 EC_KEY_up_ref(key);
329 return ret;
330 }
331
EVP_PKEY_get1_EC_KEY(EVP_PKEY * pkey)332 EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey)
333 {
334 if (pkey->type != EVP_PKEY_EC)
335 {
336 EVPerr(EVP_F_EVP_PKEY_GET1_EC_KEY, EVP_R_EXPECTING_A_EC_KEY);
337 return NULL;
338 }
339 EC_KEY_up_ref(pkey->pkey.ec);
340 return pkey->pkey.ec;
341 }
342 #endif
343
344
345 #ifndef OPENSSL_NO_DH
346
EVP_PKEY_set1_DH(EVP_PKEY * pkey,DH * key)347 int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *key)
348 {
349 int ret = EVP_PKEY_assign_DH(pkey, key);
350 if(ret)
351 DH_up_ref(key);
352 return ret;
353 }
354
EVP_PKEY_get1_DH(EVP_PKEY * pkey)355 DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey)
356 {
357 if(pkey->type != EVP_PKEY_DH) {
358 EVPerr(EVP_F_EVP_PKEY_GET1_DH, EVP_R_EXPECTING_A_DH_KEY);
359 return NULL;
360 }
361 DH_up_ref(pkey->pkey.dh);
362 return pkey->pkey.dh;
363 }
364 #endif
365
EVP_PKEY_type(int type)366 int EVP_PKEY_type(int type)
367 {
368 int ret;
369 const EVP_PKEY_ASN1_METHOD *ameth;
370 ENGINE *e;
371 ameth = EVP_PKEY_asn1_find(&e, type);
372 if (ameth)
373 ret = ameth->pkey_id;
374 else
375 ret = NID_undef;
376 #ifndef OPENSSL_NO_ENGINE
377 if (e)
378 ENGINE_finish(e);
379 #endif
380 return ret;
381 }
382
EVP_PKEY_id(const EVP_PKEY * pkey)383 int EVP_PKEY_id(const EVP_PKEY *pkey)
384 {
385 return pkey->type;
386 }
387
EVP_PKEY_base_id(const EVP_PKEY * pkey)388 int EVP_PKEY_base_id(const EVP_PKEY *pkey)
389 {
390 return EVP_PKEY_type(pkey->type);
391 }
392
EVP_PKEY_free(EVP_PKEY * x)393 void EVP_PKEY_free(EVP_PKEY *x)
394 {
395 int i;
396
397 if (x == NULL) return;
398
399 i=CRYPTO_add(&x->references,-1,CRYPTO_LOCK_EVP_PKEY);
400 #ifdef REF_PRINT
401 REF_PRINT("EVP_PKEY",x);
402 #endif
403 if (i > 0) return;
404 #ifdef REF_CHECK
405 if (i < 0)
406 {
407 fprintf(stderr,"EVP_PKEY_free, bad reference count\n");
408 abort();
409 }
410 #endif
411 EVP_PKEY_free_it(x);
412 if (x->attributes)
413 sk_X509_ATTRIBUTE_pop_free(x->attributes, X509_ATTRIBUTE_free);
414 OPENSSL_free(x);
415 }
416
EVP_PKEY_free_it(EVP_PKEY * x)417 static void EVP_PKEY_free_it(EVP_PKEY *x)
418 {
419 if (x->ameth && x->ameth->pkey_free)
420 {
421 x->ameth->pkey_free(x);
422 x->pkey.ptr = NULL;
423 }
424 #ifndef OPENSSL_NO_ENGINE
425 if (x->engine)
426 {
427 ENGINE_finish(x->engine);
428 x->engine = NULL;
429 }
430 #endif
431 }
432
unsup_alg(BIO * out,const EVP_PKEY * pkey,int indent,const char * kstr)433 static int unsup_alg(BIO *out, const EVP_PKEY *pkey, int indent,
434 const char *kstr)
435 {
436 BIO_indent(out, indent, 128);
437 BIO_printf(out, "%s algorithm \"%s\" unsupported\n",
438 kstr, OBJ_nid2ln(pkey->type));
439 return 1;
440 }
441
EVP_PKEY_print_public(BIO * out,const EVP_PKEY * pkey,int indent,ASN1_PCTX * pctx)442 int EVP_PKEY_print_public(BIO *out, const EVP_PKEY *pkey,
443 int indent, ASN1_PCTX *pctx)
444 {
445 if (pkey->ameth && pkey->ameth->pub_print)
446 return pkey->ameth->pub_print(out, pkey, indent, pctx);
447
448 return unsup_alg(out, pkey, indent, "Public Key");
449 }
450
EVP_PKEY_print_private(BIO * out,const EVP_PKEY * pkey,int indent,ASN1_PCTX * pctx)451 int EVP_PKEY_print_private(BIO *out, const EVP_PKEY *pkey,
452 int indent, ASN1_PCTX *pctx)
453 {
454 if (pkey->ameth && pkey->ameth->priv_print)
455 return pkey->ameth->priv_print(out, pkey, indent, pctx);
456
457 return unsup_alg(out, pkey, indent, "Private Key");
458 }
459
EVP_PKEY_print_params(BIO * out,const EVP_PKEY * pkey,int indent,ASN1_PCTX * pctx)460 int EVP_PKEY_print_params(BIO *out, const EVP_PKEY *pkey,
461 int indent, ASN1_PCTX *pctx)
462 {
463 if (pkey->ameth && pkey->ameth->param_print)
464 return pkey->ameth->param_print(out, pkey, indent, pctx);
465 return unsup_alg(out, pkey, indent, "Parameters");
466 }
467
EVP_PKEY_get_default_digest_nid(EVP_PKEY * pkey,int * pnid)468 int EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int *pnid)
469 {
470 if (!pkey->ameth || !pkey->ameth->pkey_ctrl)
471 return -2;
472 return pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_DEFAULT_MD_NID,
473 0, pnid);
474 }
475
476