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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/bn.h> | |
62 | #include <openssl/err.h> | |
63 | #include <openssl/objects.h> | |
64 | #include <openssl/evp.h> | |
65 | #include <openssl/x509.h> | |
66 | #ifndef OPENSSL_NO_RSA | |
67 | # include <openssl/rsa.h> | |
68 | #endif | |
69 | #ifndef OPENSSL_NO_DSA | |
70 | # include <openssl/dsa.h> | |
71 | #endif | |
72 | #ifndef OPENSSL_NO_DH | |
73 | # include <openssl/dh.h> | |
74 | #endif | |
75 | ||
76 | #ifndef OPENSSL_NO_ENGINE | |
77 | # include <openssl/engine.h> | |
78 | #endif | |
79 | ||
80 | #include "internal/asn1_int.h" | |
81 | ||
82 | static void EVP_PKEY_free_it(EVP_PKEY *x); | |
83 | ||
84 | int EVP_PKEY_bits(EVP_PKEY *pkey) | |
85 | { | |
86 | if (pkey && pkey->ameth && pkey->ameth->pkey_bits) | |
87 | return pkey->ameth->pkey_bits(pkey); | |
88 | return 0; | |
89 | } | |
90 | ||
91 | int EVP_PKEY_security_bits(const EVP_PKEY *pkey) | |
92 | { | |
93 | if (pkey == NULL) | |
94 | return 0; | |
95 | if (!pkey->ameth || !pkey->ameth->pkey_security_bits) | |
96 | return -2; | |
97 | return pkey->ameth->pkey_security_bits(pkey); | |
98 | } | |
99 | ||
100 | int EVP_PKEY_size(EVP_PKEY *pkey) | |
101 | { | |
102 | if (pkey && pkey->ameth && pkey->ameth->pkey_size) | |
103 | return pkey->ameth->pkey_size(pkey); | |
104 | return 0; | |
105 | } | |
106 | ||
107 | int EVP_PKEY_save_parameters(EVP_PKEY *pkey, int mode) | |
108 | { | |
109 | #ifndef OPENSSL_NO_DSA | |
110 | if (pkey->type == EVP_PKEY_DSA) { | |
111 | int ret = pkey->save_parameters; | |
112 | ||
113 | if (mode >= 0) | |
114 | pkey->save_parameters = mode; | |
115 | return (ret); | |
116 | } | |
117 | #endif | |
118 | #ifndef OPENSSL_NO_EC | |
119 | if (pkey->type == EVP_PKEY_EC) { | |
120 | int ret = pkey->save_parameters; | |
121 | ||
122 | if (mode >= 0) | |
123 | pkey->save_parameters = mode; | |
124 | return (ret); | |
125 | } | |
126 | #endif | |
127 | return (0); | |
128 | } | |
129 | ||
130 | int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from) | |
131 | { | |
132 | if (to->type != from->type) { | |
133 | EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_DIFFERENT_KEY_TYPES); | |
134 | goto err; | |
135 | } | |
136 | ||
137 | if (EVP_PKEY_missing_parameters(from)) { | |
138 | EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_MISSING_PARAMETERS); | |
139 | goto err; | |
140 | } | |
141 | if (from->ameth && from->ameth->param_copy) | |
142 | return from->ameth->param_copy(to, from); | |
143 | err: | |
144 | return 0; | |
145 | } | |
146 | ||
147 | int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey) | |
148 | { | |
149 | if (pkey->ameth && pkey->ameth->param_missing) | |
150 | return pkey->ameth->param_missing(pkey); | |
151 | return 0; | |
152 | } | |
153 | ||
154 | int EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b) | |
155 | { | |
156 | if (a->type != b->type) | |
157 | return -1; | |
158 | if (a->ameth && a->ameth->param_cmp) | |
159 | return a->ameth->param_cmp(a, b); | |
160 | return -2; | |
161 | } | |
162 | ||
163 | int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b) | |
164 | { | |
165 | if (a->type != b->type) | |
166 | return -1; | |
167 | ||
168 | if (a->ameth) { | |
169 | int ret; | |
170 | /* Compare parameters if the algorithm has them */ | |
171 | if (a->ameth->param_cmp) { | |
172 | ret = a->ameth->param_cmp(a, b); | |
173 | if (ret <= 0) | |
174 | return ret; | |
175 | } | |
176 | ||
177 | if (a->ameth->pub_cmp) | |
178 | return a->ameth->pub_cmp(a, b); | |
179 | } | |
180 | ||
181 | return -2; | |
182 | } | |
183 | ||
184 | EVP_PKEY *EVP_PKEY_new(void) | |
185 | { | |
186 | EVP_PKEY *ret; | |
187 | ||
188 | ret = OPENSSL_malloc(sizeof(*ret)); | |
189 | if (ret == NULL) { | |
190 | EVPerr(EVP_F_EVP_PKEY_NEW, ERR_R_MALLOC_FAILURE); | |
191 | return (NULL); | |
192 | } | |
193 | ret->type = EVP_PKEY_NONE; | |
194 | ret->save_type = EVP_PKEY_NONE; | |
195 | ret->references = 1; | |
196 | ret->ameth = NULL; | |
197 | ret->engine = NULL; | |
198 | ret->pkey.ptr = NULL; | |
199 | ret->attributes = NULL; | |
200 | ret->save_parameters = 1; | |
201 | return (ret); | |
202 | } | |
203 | ||
204 | /* | |
205 | * Setup a public key ASN1 method and ENGINE from a NID or a string. If pkey | |
206 | * is NULL just return 1 or 0 if the algorithm exists. | |
207 | */ | |
208 | ||
209 | static int pkey_set_type(EVP_PKEY *pkey, int type, const char *str, int len) | |
210 | { | |
211 | const EVP_PKEY_ASN1_METHOD *ameth; | |
212 | ENGINE *e = NULL; | |
213 | if (pkey) { | |
214 | if (pkey->pkey.ptr) | |
215 | EVP_PKEY_free_it(pkey); | |
216 | /* | |
217 | * If key type matches and a method exists then this lookup has | |
218 | * succeeded once so just indicate success. | |
219 | */ | |
220 | if ((type == pkey->save_type) && pkey->ameth) | |
221 | return 1; | |
222 | #ifndef OPENSSL_NO_ENGINE | |
223 | /* If we have an ENGINE release it */ | |
224 | if (pkey->engine) { | |
225 | ENGINE_finish(pkey->engine); | |
226 | pkey->engine = NULL; | |
227 | } | |
228 | #endif | |
229 | } | |
230 | if (str) | |
231 | ameth = EVP_PKEY_asn1_find_str(&e, str, len); | |
232 | else | |
233 | ameth = EVP_PKEY_asn1_find(&e, type); | |
234 | #ifndef OPENSSL_NO_ENGINE | |
235 | if (!pkey && e) | |
236 | ENGINE_finish(e); | |
237 | #endif | |
238 | if (!ameth) { | |
239 | EVPerr(EVP_F_PKEY_SET_TYPE, EVP_R_UNSUPPORTED_ALGORITHM); | |
240 | return 0; | |
241 | } | |
242 | if (pkey) { | |
243 | pkey->ameth = ameth; | |
244 | pkey->engine = e; | |
245 | ||
246 | pkey->type = pkey->ameth->pkey_id; | |
247 | pkey->save_type = type; | |
248 | } | |
249 | return 1; | |
250 | } | |
251 | ||
252 | int EVP_PKEY_set_type(EVP_PKEY *pkey, int type) | |
253 | { | |
254 | return pkey_set_type(pkey, type, NULL, -1); | |
255 | } | |
256 | ||
257 | int EVP_PKEY_set_type_str(EVP_PKEY *pkey, const char *str, int len) | |
258 | { | |
259 | return pkey_set_type(pkey, EVP_PKEY_NONE, str, len); | |
260 | } | |
261 | ||
262 | int EVP_PKEY_assign(EVP_PKEY *pkey, int type, void *key) | |
263 | { | |
264 | if (!EVP_PKEY_set_type(pkey, type)) | |
265 | return 0; | |
266 | pkey->pkey.ptr = key; | |
267 | return (key != NULL); | |
268 | } | |
269 | ||
270 | void *EVP_PKEY_get0(EVP_PKEY *pkey) | |
271 | { | |
272 | return pkey->pkey.ptr; | |
273 | } | |
274 | ||
275 | #ifndef OPENSSL_NO_RSA | |
276 | int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key) | |
277 | { | |
278 | int ret = EVP_PKEY_assign_RSA(pkey, key); | |
279 | if (ret) | |
280 | RSA_up_ref(key); | |
281 | return ret; | |
282 | } | |
283 | ||
284 | RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey) | |
285 | { | |
286 | if (pkey->type != EVP_PKEY_RSA) { | |
287 | EVPerr(EVP_F_EVP_PKEY_GET1_RSA, EVP_R_EXPECTING_AN_RSA_KEY); | |
288 | return NULL; | |
289 | } | |
290 | RSA_up_ref(pkey->pkey.rsa); | |
291 | return pkey->pkey.rsa; | |
292 | } | |
293 | #endif | |
294 | ||
295 | #ifndef OPENSSL_NO_DSA | |
296 | int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key) | |
297 | { | |
298 | int ret = EVP_PKEY_assign_DSA(pkey, key); | |
299 | if (ret) | |
300 | DSA_up_ref(key); | |
301 | return ret; | |
302 | } | |
303 | ||
304 | DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey) | |
305 | { | |
306 | if (pkey->type != EVP_PKEY_DSA) { | |
307 | EVPerr(EVP_F_EVP_PKEY_GET1_DSA, EVP_R_EXPECTING_A_DSA_KEY); | |
308 | return NULL; | |
309 | } | |
310 | DSA_up_ref(pkey->pkey.dsa); | |
311 | return pkey->pkey.dsa; | |
312 | } | |
313 | #endif | |
314 | ||
315 | #ifndef OPENSSL_NO_EC | |
316 | ||
317 | int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key) | |
318 | { | |
319 | int ret = EVP_PKEY_assign_EC_KEY(pkey, key); | |
320 | if (ret) | |
321 | EC_KEY_up_ref(key); | |
322 | return ret; | |
323 | } | |
324 | ||
325 | EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey) | |
326 | { | |
327 | if (pkey->type != EVP_PKEY_EC) { | |
328 | EVPerr(EVP_F_EVP_PKEY_GET1_EC_KEY, EVP_R_EXPECTING_A_EC_KEY); | |
329 | return NULL; | |
330 | } | |
331 | EC_KEY_up_ref(pkey->pkey.ec); | |
332 | return pkey->pkey.ec; | |
333 | } | |
334 | #endif | |
335 | ||
336 | #ifndef OPENSSL_NO_DH | |
337 | ||
338 | int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *key) | |
339 | { | |
340 | int ret = EVP_PKEY_assign_DH(pkey, key); | |
341 | if (ret) | |
342 | DH_up_ref(key); | |
343 | return ret; | |
344 | } | |
345 | ||
346 | DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey) | |
347 | { | |
348 | if (pkey->type != EVP_PKEY_DH && pkey->type != EVP_PKEY_DHX) { | |
349 | EVPerr(EVP_F_EVP_PKEY_GET1_DH, EVP_R_EXPECTING_A_DH_KEY); | |
350 | return NULL; | |
351 | } | |
352 | DH_up_ref(pkey->pkey.dh); | |
353 | return pkey->pkey.dh; | |
354 | } | |
355 | #endif | |
356 | ||
357 | int EVP_PKEY_type(int type) | |
358 | { | |
359 | int ret; | |
360 | const EVP_PKEY_ASN1_METHOD *ameth; | |
361 | ENGINE *e; | |
362 | ameth = EVP_PKEY_asn1_find(&e, type); | |
363 | if (ameth) | |
364 | ret = ameth->pkey_id; | |
365 | else | |
366 | ret = NID_undef; | |
367 | #ifndef OPENSSL_NO_ENGINE | |
368 | if (e) | |
369 | ENGINE_finish(e); | |
370 | #endif | |
371 | return ret; | |
372 | } | |
373 | ||
374 | int EVP_PKEY_id(const EVP_PKEY *pkey) | |
375 | { | |
376 | return pkey->type; | |
377 | } | |
378 | ||
379 | int EVP_PKEY_base_id(const EVP_PKEY *pkey) | |
380 | { | |
381 | return EVP_PKEY_type(pkey->type); | |
382 | } | |
383 | ||
384 | void EVP_PKEY_free(EVP_PKEY *x) | |
385 | { | |
386 | int i; | |
387 | ||
388 | if (x == NULL) | |
389 | return; | |
390 | ||
391 | i = CRYPTO_add(&x->references, -1, CRYPTO_LOCK_EVP_PKEY); | |
392 | #ifdef REF_PRINT | |
393 | REF_PRINT("EVP_PKEY", x); | |
394 | #endif | |
395 | if (i > 0) | |
396 | return; | |
397 | #ifdef REF_CHECK | |
398 | if (i < 0) { | |
399 | fprintf(stderr, "EVP_PKEY_free, bad reference count\n"); | |
400 | abort(); | |
401 | } | |
402 | #endif | |
403 | EVP_PKEY_free_it(x); | |
404 | sk_X509_ATTRIBUTE_pop_free(x->attributes, X509_ATTRIBUTE_free); | |
405 | OPENSSL_free(x); | |
406 | } | |
407 | ||
408 | static void EVP_PKEY_free_it(EVP_PKEY *x) | |
409 | { | |
410 | /* internal function; x is never NULL */ | |
411 | if (x->ameth && x->ameth->pkey_free) { | |
412 | x->ameth->pkey_free(x); | |
413 | x->pkey.ptr = NULL; | |
414 | } | |
415 | #ifndef OPENSSL_NO_ENGINE | |
416 | if (x->engine) { | |
417 | ENGINE_finish(x->engine); | |
418 | x->engine = NULL; | |
419 | } | |
420 | #endif | |
421 | } | |
422 | ||
423 | static int unsup_alg(BIO *out, const EVP_PKEY *pkey, int indent, | |
424 | const char *kstr) | |
425 | { | |
426 | BIO_indent(out, indent, 128); | |
427 | BIO_printf(out, "%s algorithm \"%s\" unsupported\n", | |
428 | kstr, OBJ_nid2ln(pkey->type)); | |
429 | return 1; | |
430 | } | |
431 | ||
432 | int EVP_PKEY_print_public(BIO *out, const EVP_PKEY *pkey, | |
433 | int indent, ASN1_PCTX *pctx) | |
434 | { | |
435 | if (pkey->ameth && pkey->ameth->pub_print) | |
436 | return pkey->ameth->pub_print(out, pkey, indent, pctx); | |
437 | ||
438 | return unsup_alg(out, pkey, indent, "Public Key"); | |
439 | } | |
440 | ||
441 | int EVP_PKEY_print_private(BIO *out, const EVP_PKEY *pkey, | |
442 | int indent, ASN1_PCTX *pctx) | |
443 | { | |
444 | if (pkey->ameth && pkey->ameth->priv_print) | |
445 | return pkey->ameth->priv_print(out, pkey, indent, pctx); | |
446 | ||
447 | return unsup_alg(out, pkey, indent, "Private Key"); | |
448 | } | |
449 | ||
450 | int EVP_PKEY_print_params(BIO *out, const EVP_PKEY *pkey, | |
451 | int indent, ASN1_PCTX *pctx) | |
452 | { | |
453 | if (pkey->ameth && pkey->ameth->param_print) | |
454 | return pkey->ameth->param_print(out, pkey, indent, pctx); | |
455 | return unsup_alg(out, pkey, indent, "Parameters"); | |
456 | } | |
457 | ||
458 | int EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int *pnid) | |
459 | { | |
460 | if (!pkey->ameth || !pkey->ameth->pkey_ctrl) | |
461 | return -2; | |
462 | return pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_DEFAULT_MD_NID, | |
463 | 0, pnid); | |
464 | } |