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