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1 | /* |
2 | * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project | |
3 | * 2006. | |
4 | */ | |
5 | /* ==================================================================== | |
6 | * Copyright (c) 2006 The OpenSSL Project. All rights reserved. | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * | |
15 | * 2. Redistributions in binary form must reproduce the above copyright | |
16 | * notice, this list of conditions and the following disclaimer in | |
17 | * the documentation and/or other materials provided with the | |
18 | * distribution. | |
19 | * | |
20 | * 3. All advertising materials mentioning features or use of this | |
21 | * software must display the following acknowledgment: | |
22 | * "This product includes software developed by the OpenSSL Project | |
23 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
24 | * | |
25 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
26 | * endorse or promote products derived from this software without | |
27 | * prior written permission. For written permission, please contact | |
28 | * licensing@OpenSSL.org. | |
29 | * | |
30 | * 5. Products derived from this software may not be called "OpenSSL" | |
31 | * nor may "OpenSSL" appear in their names without prior written | |
32 | * permission of the OpenSSL Project. | |
33 | * | |
34 | * 6. Redistributions of any form whatsoever must retain the following | |
35 | * acknowledgment: | |
36 | * "This product includes software developed by the OpenSSL Project | |
37 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
38 | * | |
39 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
40 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
41 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
42 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
43 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
44 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
45 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
46 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
48 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
49 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
50 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
51 | * ==================================================================== | |
52 | * | |
53 | * This product includes cryptographic software written by Eric Young | |
54 | * (eay@cryptsoft.com). This product includes software written by Tim | |
55 | * Hudson (tjh@cryptsoft.com). | |
56 | * | |
57 | */ | |
58 | ||
59 | #include <stdio.h> | |
60 | #include "cryptlib.h" | |
61 | #include <openssl/asn1t.h> | |
62 | #include <openssl/x509.h> | |
63 | #ifndef OPENSSL_NO_ENGINE | |
64 | # include <openssl/engine.h> | |
65 | #endif | |
66 | #include "asn1_locl.h" | |
67 | ||
68 | extern const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[]; | |
69 | extern const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[]; | |
70 | extern const EVP_PKEY_ASN1_METHOD dh_asn1_meth; | |
71 | extern const EVP_PKEY_ASN1_METHOD dhx_asn1_meth; | |
72 | extern const EVP_PKEY_ASN1_METHOD eckey_asn1_meth; | |
73 | extern const EVP_PKEY_ASN1_METHOD hmac_asn1_meth; | |
74 | extern const EVP_PKEY_ASN1_METHOD cmac_asn1_meth; | |
75 | ||
76 | /* Keep this sorted in type order !! */ | |
77 | static const EVP_PKEY_ASN1_METHOD *standard_methods[] = { | |
78 | #ifndef OPENSSL_NO_RSA | |
79 | &rsa_asn1_meths[0], | |
80 | &rsa_asn1_meths[1], | |
81 | #endif | |
82 | #ifndef OPENSSL_NO_DH | |
83 | &dh_asn1_meth, | |
84 | #endif | |
85 | #ifndef OPENSSL_NO_DSA | |
86 | &dsa_asn1_meths[0], | |
87 | &dsa_asn1_meths[1], | |
88 | &dsa_asn1_meths[2], | |
89 | &dsa_asn1_meths[3], | |
90 | &dsa_asn1_meths[4], | |
91 | #endif | |
92 | #ifndef OPENSSL_NO_EC | |
93 | &eckey_asn1_meth, | |
94 | #endif | |
95 | &hmac_asn1_meth, | |
96 | &cmac_asn1_meth, | |
97 | #ifndef OPENSSL_NO_DH | |
98 | &dhx_asn1_meth | |
99 | #endif | |
100 | }; | |
101 | ||
102 | typedef int sk_cmp_fn_type(const char *const *a, const char *const *b); | |
103 | DECLARE_STACK_OF(EVP_PKEY_ASN1_METHOD) | |
104 | static STACK_OF(EVP_PKEY_ASN1_METHOD) *app_methods = NULL; | |
105 | ||
106 | #ifdef TEST | |
107 | void main() | |
108 | { | |
109 | int i; | |
110 | for (i = 0; | |
111 | i < sizeof(standard_methods) / sizeof(EVP_PKEY_ASN1_METHOD *); i++) | |
112 | fprintf(stderr, "Number %d id=%d (%s)\n", i, | |
113 | standard_methods[i]->pkey_id, | |
114 | OBJ_nid2sn(standard_methods[i]->pkey_id)); | |
115 | } | |
116 | #endif | |
117 | ||
118 | DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_ASN1_METHOD *, | |
119 | const EVP_PKEY_ASN1_METHOD *, ameth); | |
120 | ||
121 | static int ameth_cmp(const EVP_PKEY_ASN1_METHOD *const *a, | |
122 | const EVP_PKEY_ASN1_METHOD *const *b) | |
123 | { | |
124 | return ((*a)->pkey_id - (*b)->pkey_id); | |
125 | } | |
126 | ||
127 | IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_ASN1_METHOD *, | |
128 | const EVP_PKEY_ASN1_METHOD *, ameth); | |
129 | ||
130 | int EVP_PKEY_asn1_get_count(void) | |
131 | { | |
132 | int num = sizeof(standard_methods) / sizeof(EVP_PKEY_ASN1_METHOD *); | |
133 | if (app_methods) | |
134 | num += sk_EVP_PKEY_ASN1_METHOD_num(app_methods); | |
135 | return num; | |
136 | } | |
137 | ||
138 | const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_get0(int idx) | |
139 | { | |
140 | int num = sizeof(standard_methods) / sizeof(EVP_PKEY_ASN1_METHOD *); | |
141 | if (idx < 0) | |
142 | return NULL; | |
143 | if (idx < num) | |
144 | return standard_methods[idx]; | |
145 | idx -= num; | |
146 | return sk_EVP_PKEY_ASN1_METHOD_value(app_methods, idx); | |
147 | } | |
148 | ||
149 | static const EVP_PKEY_ASN1_METHOD *pkey_asn1_find(int type) | |
150 | { | |
151 | EVP_PKEY_ASN1_METHOD tmp; | |
152 | const EVP_PKEY_ASN1_METHOD *t = &tmp, **ret; | |
153 | tmp.pkey_id = type; | |
154 | if (app_methods) { | |
155 | int idx; | |
156 | idx = sk_EVP_PKEY_ASN1_METHOD_find(app_methods, &tmp); | |
157 | if (idx >= 0) | |
158 | return sk_EVP_PKEY_ASN1_METHOD_value(app_methods, idx); | |
159 | } | |
160 | ret = OBJ_bsearch_ameth(&t, standard_methods, sizeof(standard_methods) | |
161 | / sizeof(EVP_PKEY_ASN1_METHOD *)); | |
162 | if (!ret || !*ret) | |
163 | return NULL; | |
164 | return *ret; | |
165 | } | |
166 | ||
167 | /* | |
168 | * Find an implementation of an ASN1 algorithm. If 'pe' is not NULL also | |
169 | * search through engines and set *pe to a functional reference to the engine | |
170 | * implementing 'type' or NULL if no engine implements it. | |
171 | */ | |
172 | ||
173 | const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_find(ENGINE **pe, int type) | |
174 | { | |
175 | const EVP_PKEY_ASN1_METHOD *t; | |
176 | ||
177 | for (;;) { | |
178 | t = pkey_asn1_find(type); | |
179 | if (!t || !(t->pkey_flags & ASN1_PKEY_ALIAS)) | |
180 | break; | |
181 | type = t->pkey_base_id; | |
182 | } | |
183 | if (pe) { | |
184 | #ifndef OPENSSL_NO_ENGINE | |
185 | ENGINE *e; | |
186 | /* type will contain the final unaliased type */ | |
187 | e = ENGINE_get_pkey_asn1_meth_engine(type); | |
188 | if (e) { | |
189 | *pe = e; | |
190 | return ENGINE_get_pkey_asn1_meth(e, type); | |
191 | } | |
192 | #endif | |
193 | *pe = NULL; | |
194 | } | |
195 | return t; | |
196 | } | |
197 | ||
198 | const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_find_str(ENGINE **pe, | |
199 | const char *str, int len) | |
200 | { | |
201 | int i; | |
202 | const EVP_PKEY_ASN1_METHOD *ameth; | |
203 | if (len == -1) | |
204 | len = strlen(str); | |
205 | if (pe) { | |
206 | #ifndef OPENSSL_NO_ENGINE | |
207 | ENGINE *e; | |
208 | ameth = ENGINE_pkey_asn1_find_str(&e, str, len); | |
209 | if (ameth) { | |
210 | /* | |
211 | * Convert structural into functional reference | |
212 | */ | |
213 | if (!ENGINE_init(e)) | |
214 | ameth = NULL; | |
215 | ENGINE_free(e); | |
216 | *pe = e; | |
217 | return ameth; | |
218 | } | |
219 | #endif | |
220 | *pe = NULL; | |
221 | } | |
222 | for (i = 0; i < EVP_PKEY_asn1_get_count(); i++) { | |
223 | ameth = EVP_PKEY_asn1_get0(i); | |
224 | if (ameth->pkey_flags & ASN1_PKEY_ALIAS) | |
225 | continue; | |
226 | if (((int)strlen(ameth->pem_str) == len) && | |
227 | !strncasecmp(ameth->pem_str, str, len)) | |
228 | return ameth; | |
229 | } | |
230 | return NULL; | |
231 | } | |
232 | ||
233 | int EVP_PKEY_asn1_add0(const EVP_PKEY_ASN1_METHOD *ameth) | |
234 | { | |
235 | if (app_methods == NULL) { | |
236 | app_methods = sk_EVP_PKEY_ASN1_METHOD_new(ameth_cmp); | |
237 | if (!app_methods) | |
238 | return 0; | |
239 | } | |
240 | if (!sk_EVP_PKEY_ASN1_METHOD_push(app_methods, ameth)) | |
241 | return 0; | |
242 | sk_EVP_PKEY_ASN1_METHOD_sort(app_methods); | |
243 | return 1; | |
244 | } | |
245 | ||
246 | int EVP_PKEY_asn1_add_alias(int to, int from) | |
247 | { | |
248 | EVP_PKEY_ASN1_METHOD *ameth; | |
249 | ameth = EVP_PKEY_asn1_new(from, ASN1_PKEY_ALIAS, NULL, NULL); | |
250 | if (!ameth) | |
251 | return 0; | |
252 | ameth->pkey_base_id = to; | |
253 | if (!EVP_PKEY_asn1_add0(ameth)) { | |
254 | EVP_PKEY_asn1_free(ameth); | |
255 | return 0; | |
256 | } | |
257 | return 1; | |
258 | } | |
259 | ||
260 | int EVP_PKEY_asn1_get0_info(int *ppkey_id, int *ppkey_base_id, | |
261 | int *ppkey_flags, const char **pinfo, | |
262 | const char **ppem_str, | |
263 | const EVP_PKEY_ASN1_METHOD *ameth) | |
264 | { | |
265 | if (!ameth) | |
266 | return 0; | |
267 | if (ppkey_id) | |
268 | *ppkey_id = ameth->pkey_id; | |
269 | if (ppkey_base_id) | |
270 | *ppkey_base_id = ameth->pkey_base_id; | |
271 | if (ppkey_flags) | |
272 | *ppkey_flags = ameth->pkey_flags; | |
273 | if (pinfo) | |
274 | *pinfo = ameth->info; | |
275 | if (ppem_str) | |
276 | *ppem_str = ameth->pem_str; | |
277 | return 1; | |
278 | } | |
279 | ||
280 | const EVP_PKEY_ASN1_METHOD *EVP_PKEY_get0_asn1(EVP_PKEY *pkey) | |
281 | { | |
282 | return pkey->ameth; | |
283 | } | |
284 | ||
285 | EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_new(int id, int flags, | |
286 | const char *pem_str, const char *info) | |
287 | { | |
288 | EVP_PKEY_ASN1_METHOD *ameth; | |
289 | ameth = OPENSSL_malloc(sizeof(EVP_PKEY_ASN1_METHOD)); | |
290 | if (!ameth) | |
291 | return NULL; | |
292 | ||
293 | memset(ameth, 0, sizeof(EVP_PKEY_ASN1_METHOD)); | |
294 | ||
295 | ameth->pkey_id = id; | |
296 | ameth->pkey_base_id = id; | |
297 | ameth->pkey_flags = flags | ASN1_PKEY_DYNAMIC; | |
298 | ||
299 | if (info) { | |
300 | ameth->info = BUF_strdup(info); | |
301 | if (!ameth->info) | |
302 | goto err; | |
303 | } else | |
304 | ameth->info = NULL; | |
305 | ||
306 | if (pem_str) { | |
307 | ameth->pem_str = BUF_strdup(pem_str); | |
308 | if (!ameth->pem_str) | |
309 | goto err; | |
310 | } else | |
311 | ameth->pem_str = NULL; | |
312 | ||
313 | ameth->pub_decode = 0; | |
314 | ameth->pub_encode = 0; | |
315 | ameth->pub_cmp = 0; | |
316 | ameth->pub_print = 0; | |
317 | ||
318 | ameth->priv_decode = 0; | |
319 | ameth->priv_encode = 0; | |
320 | ameth->priv_print = 0; | |
321 | ||
322 | ameth->old_priv_encode = 0; | |
323 | ameth->old_priv_decode = 0; | |
324 | ||
325 | ameth->item_verify = 0; | |
326 | ameth->item_sign = 0; | |
327 | ||
328 | ameth->pkey_size = 0; | |
329 | ameth->pkey_bits = 0; | |
330 | ||
331 | ameth->param_decode = 0; | |
332 | ameth->param_encode = 0; | |
333 | ameth->param_missing = 0; | |
334 | ameth->param_copy = 0; | |
335 | ameth->param_cmp = 0; | |
336 | ameth->param_print = 0; | |
337 | ||
338 | ameth->pkey_free = 0; | |
339 | ameth->pkey_ctrl = 0; | |
340 | ||
341 | return ameth; | |
342 | ||
343 | err: | |
344 | ||
345 | EVP_PKEY_asn1_free(ameth); | |
346 | return NULL; | |
347 | ||
348 | } | |
349 | ||
350 | void EVP_PKEY_asn1_copy(EVP_PKEY_ASN1_METHOD *dst, | |
351 | const EVP_PKEY_ASN1_METHOD *src) | |
352 | { | |
353 | ||
354 | dst->pub_decode = src->pub_decode; | |
355 | dst->pub_encode = src->pub_encode; | |
356 | dst->pub_cmp = src->pub_cmp; | |
357 | dst->pub_print = src->pub_print; | |
358 | ||
359 | dst->priv_decode = src->priv_decode; | |
360 | dst->priv_encode = src->priv_encode; | |
361 | dst->priv_print = src->priv_print; | |
362 | ||
363 | dst->old_priv_encode = src->old_priv_encode; | |
364 | dst->old_priv_decode = src->old_priv_decode; | |
365 | ||
366 | dst->pkey_size = src->pkey_size; | |
367 | dst->pkey_bits = src->pkey_bits; | |
368 | ||
369 | dst->param_decode = src->param_decode; | |
370 | dst->param_encode = src->param_encode; | |
371 | dst->param_missing = src->param_missing; | |
372 | dst->param_copy = src->param_copy; | |
373 | dst->param_cmp = src->param_cmp; | |
374 | dst->param_print = src->param_print; | |
375 | ||
376 | dst->pkey_free = src->pkey_free; | |
377 | dst->pkey_ctrl = src->pkey_ctrl; | |
378 | ||
379 | dst->item_sign = src->item_sign; | |
380 | dst->item_verify = src->item_verify; | |
381 | ||
382 | } | |
383 | ||
384 | void EVP_PKEY_asn1_free(EVP_PKEY_ASN1_METHOD *ameth) | |
385 | { | |
386 | if (ameth && (ameth->pkey_flags & ASN1_PKEY_DYNAMIC)) { | |
387 | if (ameth->pem_str) | |
388 | OPENSSL_free(ameth->pem_str); | |
389 | if (ameth->info) | |
390 | OPENSSL_free(ameth->info); | |
391 | OPENSSL_free(ameth); | |
392 | } | |
393 | } | |
394 | ||
395 | void EVP_PKEY_asn1_set_public(EVP_PKEY_ASN1_METHOD *ameth, | |
396 | int (*pub_decode) (EVP_PKEY *pk, | |
397 | X509_PUBKEY *pub), | |
398 | int (*pub_encode) (X509_PUBKEY *pub, | |
399 | const EVP_PKEY *pk), | |
400 | int (*pub_cmp) (const EVP_PKEY *a, | |
401 | const EVP_PKEY *b), | |
402 | int (*pub_print) (BIO *out, | |
403 | const EVP_PKEY *pkey, | |
404 | int indent, ASN1_PCTX *pctx), | |
405 | int (*pkey_size) (const EVP_PKEY *pk), | |
406 | int (*pkey_bits) (const EVP_PKEY *pk)) | |
407 | { | |
408 | ameth->pub_decode = pub_decode; | |
409 | ameth->pub_encode = pub_encode; | |
410 | ameth->pub_cmp = pub_cmp; | |
411 | ameth->pub_print = pub_print; | |
412 | ameth->pkey_size = pkey_size; | |
413 | ameth->pkey_bits = pkey_bits; | |
414 | } | |
415 | ||
416 | void EVP_PKEY_asn1_set_private(EVP_PKEY_ASN1_METHOD *ameth, | |
417 | int (*priv_decode) (EVP_PKEY *pk, | |
418 | PKCS8_PRIV_KEY_INFO | |
419 | *p8inf), | |
420 | int (*priv_encode) (PKCS8_PRIV_KEY_INFO *p8, | |
421 | const EVP_PKEY *pk), | |
422 | int (*priv_print) (BIO *out, | |
423 | const EVP_PKEY *pkey, | |
424 | int indent, | |
425 | ASN1_PCTX *pctx)) | |
426 | { | |
427 | ameth->priv_decode = priv_decode; | |
428 | ameth->priv_encode = priv_encode; | |
429 | ameth->priv_print = priv_print; | |
430 | } | |
431 | ||
432 | void EVP_PKEY_asn1_set_param(EVP_PKEY_ASN1_METHOD *ameth, | |
433 | int (*param_decode) (EVP_PKEY *pkey, | |
434 | const unsigned char **pder, | |
435 | int derlen), | |
436 | int (*param_encode) (const EVP_PKEY *pkey, | |
437 | unsigned char **pder), | |
438 | int (*param_missing) (const EVP_PKEY *pk), | |
439 | int (*param_copy) (EVP_PKEY *to, | |
440 | const EVP_PKEY *from), | |
441 | int (*param_cmp) (const EVP_PKEY *a, | |
442 | const EVP_PKEY *b), | |
443 | int (*param_print) (BIO *out, | |
444 | const EVP_PKEY *pkey, | |
445 | int indent, ASN1_PCTX *pctx)) | |
446 | { | |
447 | ameth->param_decode = param_decode; | |
448 | ameth->param_encode = param_encode; | |
449 | ameth->param_missing = param_missing; | |
450 | ameth->param_copy = param_copy; | |
451 | ameth->param_cmp = param_cmp; | |
452 | ameth->param_print = param_print; | |
453 | } | |
454 | ||
455 | void EVP_PKEY_asn1_set_free(EVP_PKEY_ASN1_METHOD *ameth, | |
456 | void (*pkey_free) (EVP_PKEY *pkey)) | |
457 | { | |
458 | ameth->pkey_free = pkey_free; | |
459 | } | |
460 | ||
461 | void EVP_PKEY_asn1_set_ctrl(EVP_PKEY_ASN1_METHOD *ameth, | |
462 | int (*pkey_ctrl) (EVP_PKEY *pkey, int op, | |
463 | long arg1, void *arg2)) | |
464 | { | |
465 | ameth->pkey_ctrl = pkey_ctrl; | |
466 | } | |
467 | ||
468 | void EVP_PKEY_asn1_set_item(EVP_PKEY_ASN1_METHOD *ameth, | |
469 | int (*item_verify) (EVP_MD_CTX *ctx, | |
470 | const ASN1_ITEM *it, | |
471 | void *asn, | |
472 | X509_ALGOR *a, | |
473 | ASN1_BIT_STRING *sig, | |
474 | EVP_PKEY *pkey), | |
475 | int (*item_sign) (EVP_MD_CTX *ctx, | |
476 | const ASN1_ITEM *it, | |
477 | void *asn, | |
478 | X509_ALGOR *alg1, | |
479 | X509_ALGOR *alg2, | |
480 | ASN1_BIT_STRING *sig)) | |
481 | { | |
482 | ameth->item_sign = item_sign; | |
483 | ameth->item_verify = item_verify; | |
484 | } |