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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/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 && pkey->type != EVP_PKEY_DHX) { | |
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 | } | |
469 |