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 eckey_asn1_meth;
72 extern const EVP_PKEY_ASN1_METHOD hmac_asn1_meth;
73 extern const EVP_PKEY_ASN1_METHOD cmac_asn1_meth;
74
75 /* Keep this sorted in type order !! */
76 static const EVP_PKEY_ASN1_METHOD *standard_methods[] = {
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 #ifdef TEST
main()103 void main()
104 {
105 int i;
106 for (i = 0;
107 i < sizeof(standard_methods) / sizeof(EVP_PKEY_ASN1_METHOD *); i++)
108 fprintf(stderr, "Number %d id=%d (%s)\n", i,
109 standard_methods[i]->pkey_id,
110 OBJ_nid2sn(standard_methods[i]->pkey_id));
111 }
112 #endif
113
114 DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_ASN1_METHOD *,
115 const EVP_PKEY_ASN1_METHOD *, ameth);
116
ameth_cmp(const EVP_PKEY_ASN1_METHOD * const * a,const EVP_PKEY_ASN1_METHOD * const * b)117 static int ameth_cmp(const EVP_PKEY_ASN1_METHOD *const *a,
118 const EVP_PKEY_ASN1_METHOD *const *b)
119 {
120 return ((*a)->pkey_id - (*b)->pkey_id);
121 }
122
123 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_ASN1_METHOD *,
124 const EVP_PKEY_ASN1_METHOD *, ameth);
125
EVP_PKEY_asn1_get_count(void)126 int EVP_PKEY_asn1_get_count(void)
127 {
128 int num = sizeof(standard_methods) / sizeof(EVP_PKEY_ASN1_METHOD *);
129 if (app_methods)
130 num += sk_EVP_PKEY_ASN1_METHOD_num(app_methods);
131 return num;
132 }
133
EVP_PKEY_asn1_get0(int idx)134 const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_get0(int idx)
135 {
136 int num = sizeof(standard_methods) / sizeof(EVP_PKEY_ASN1_METHOD *);
137 if (idx < 0)
138 return NULL;
139 if (idx < num)
140 return standard_methods[idx];
141 idx -= num;
142 return sk_EVP_PKEY_ASN1_METHOD_value(app_methods, idx);
143 }
144
pkey_asn1_find(int type)145 static const EVP_PKEY_ASN1_METHOD *pkey_asn1_find(int type)
146 {
147 EVP_PKEY_ASN1_METHOD tmp;
148 const EVP_PKEY_ASN1_METHOD *t = &tmp, **ret;
149 tmp.pkey_id = type;
150 if (app_methods) {
151 int idx;
152 idx = sk_EVP_PKEY_ASN1_METHOD_find(app_methods, &tmp);
153 if (idx >= 0)
154 return sk_EVP_PKEY_ASN1_METHOD_value(app_methods, idx);
155 }
156 ret = OBJ_bsearch_ameth(&t, standard_methods, sizeof(standard_methods)
157 / sizeof(EVP_PKEY_ASN1_METHOD *));
158 if (!ret || !*ret)
159 return NULL;
160 return *ret;
161 }
162
163 /*
164 * Find an implementation of an ASN1 algorithm. If 'pe' is not NULL also
165 * search through engines and set *pe to a functional reference to the engine
166 * implementing 'type' or NULL if no engine implements it.
167 */
168
EVP_PKEY_asn1_find(ENGINE ** pe,int type)169 const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_find(ENGINE **pe, int type)
170 {
171 const EVP_PKEY_ASN1_METHOD *t;
172
173 for (;;) {
174 t = pkey_asn1_find(type);
175 if (!t || !(t->pkey_flags & ASN1_PKEY_ALIAS))
176 break;
177 type = t->pkey_base_id;
178 }
179 if (pe) {
180 #ifndef OPENSSL_NO_ENGINE
181 ENGINE *e;
182 /* type will contain the final unaliased type */
183 e = ENGINE_get_pkey_asn1_meth_engine(type);
184 if (e) {
185 *pe = e;
186 return ENGINE_get_pkey_asn1_meth(e, type);
187 }
188 #endif
189 *pe = NULL;
190 }
191 return t;
192 }
193
EVP_PKEY_asn1_find_str(ENGINE ** pe,const char * str,int len)194 const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_find_str(ENGINE **pe,
195 const char *str, int len)
196 {
197 int i;
198 const EVP_PKEY_ASN1_METHOD *ameth;
199 if (len == -1)
200 len = strlen(str);
201 if (pe) {
202 #ifndef OPENSSL_NO_ENGINE
203 ENGINE *e;
204 ameth = ENGINE_pkey_asn1_find_str(&e, str, len);
205 if (ameth) {
206 /*
207 * Convert structural into functional reference
208 */
209 if (!ENGINE_init(e))
210 ameth = NULL;
211 ENGINE_free(e);
212 *pe = e;
213 return ameth;
214 }
215 #endif
216 *pe = NULL;
217 }
218 for (i = 0; i < EVP_PKEY_asn1_get_count(); i++) {
219 ameth = EVP_PKEY_asn1_get0(i);
220 if (ameth->pkey_flags & ASN1_PKEY_ALIAS)
221 continue;
222 if (((int)strlen(ameth->pem_str) == len) &&
223 !strncasecmp(ameth->pem_str, str, len))
224 return ameth;
225 }
226 return NULL;
227 }
228
EVP_PKEY_asn1_add0(const EVP_PKEY_ASN1_METHOD * ameth)229 int EVP_PKEY_asn1_add0(const EVP_PKEY_ASN1_METHOD *ameth)
230 {
231 if (app_methods == NULL) {
232 app_methods = sk_EVP_PKEY_ASN1_METHOD_new(ameth_cmp);
233 if (!app_methods)
234 return 0;
235 }
236 if (!sk_EVP_PKEY_ASN1_METHOD_push(app_methods, ameth))
237 return 0;
238 sk_EVP_PKEY_ASN1_METHOD_sort(app_methods);
239 return 1;
240 }
241
EVP_PKEY_asn1_add_alias(int to,int from)242 int EVP_PKEY_asn1_add_alias(int to, int from)
243 {
244 EVP_PKEY_ASN1_METHOD *ameth;
245 ameth = EVP_PKEY_asn1_new(from, ASN1_PKEY_ALIAS, NULL, NULL);
246 if (!ameth)
247 return 0;
248 ameth->pkey_base_id = to;
249 if (!EVP_PKEY_asn1_add0(ameth)) {
250 EVP_PKEY_asn1_free(ameth);
251 return 0;
252 }
253 return 1;
254 }
255
EVP_PKEY_asn1_get0_info(int * ppkey_id,int * ppkey_base_id,int * ppkey_flags,const char ** pinfo,const char ** ppem_str,const EVP_PKEY_ASN1_METHOD * ameth)256 int EVP_PKEY_asn1_get0_info(int *ppkey_id, int *ppkey_base_id,
257 int *ppkey_flags, const char **pinfo,
258 const char **ppem_str,
259 const EVP_PKEY_ASN1_METHOD *ameth)
260 {
261 if (!ameth)
262 return 0;
263 if (ppkey_id)
264 *ppkey_id = ameth->pkey_id;
265 if (ppkey_base_id)
266 *ppkey_base_id = ameth->pkey_base_id;
267 if (ppkey_flags)
268 *ppkey_flags = ameth->pkey_flags;
269 if (pinfo)
270 *pinfo = ameth->info;
271 if (ppem_str)
272 *ppem_str = ameth->pem_str;
273 return 1;
274 }
275
EVP_PKEY_get0_asn1(EVP_PKEY * pkey)276 const EVP_PKEY_ASN1_METHOD *EVP_PKEY_get0_asn1(EVP_PKEY *pkey)
277 {
278 return pkey->ameth;
279 }
280
EVP_PKEY_asn1_new(int id,int flags,const char * pem_str,const char * info)281 EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_new(int id, int flags,
282 const char *pem_str, const char *info)
283 {
284 EVP_PKEY_ASN1_METHOD *ameth;
285 ameth = OPENSSL_malloc(sizeof(EVP_PKEY_ASN1_METHOD));
286 if (!ameth)
287 return NULL;
288
289 memset(ameth, 0, sizeof(EVP_PKEY_ASN1_METHOD));
290
291 ameth->pkey_id = id;
292 ameth->pkey_base_id = id;
293 ameth->pkey_flags = flags | ASN1_PKEY_DYNAMIC;
294
295 if (info) {
296 ameth->info = BUF_strdup(info);
297 if (!ameth->info)
298 goto err;
299 } else
300 ameth->info = NULL;
301
302 if (pem_str) {
303 ameth->pem_str = BUF_strdup(pem_str);
304 if (!ameth->pem_str)
305 goto err;
306 } else
307 ameth->pem_str = NULL;
308
309 ameth->pub_decode = 0;
310 ameth->pub_encode = 0;
311 ameth->pub_cmp = 0;
312 ameth->pub_print = 0;
313
314 ameth->priv_decode = 0;
315 ameth->priv_encode = 0;
316 ameth->priv_print = 0;
317
318 ameth->old_priv_encode = 0;
319 ameth->old_priv_decode = 0;
320
321 ameth->item_verify = 0;
322 ameth->item_sign = 0;
323
324 ameth->pkey_size = 0;
325 ameth->pkey_bits = 0;
326
327 ameth->param_decode = 0;
328 ameth->param_encode = 0;
329 ameth->param_missing = 0;
330 ameth->param_copy = 0;
331 ameth->param_cmp = 0;
332 ameth->param_print = 0;
333
334 ameth->pkey_free = 0;
335 ameth->pkey_ctrl = 0;
336
337 return ameth;
338
339 err:
340
341 EVP_PKEY_asn1_free(ameth);
342 return NULL;
343
344 }
345
EVP_PKEY_asn1_copy(EVP_PKEY_ASN1_METHOD * dst,const EVP_PKEY_ASN1_METHOD * src)346 void EVP_PKEY_asn1_copy(EVP_PKEY_ASN1_METHOD *dst,
347 const EVP_PKEY_ASN1_METHOD *src)
348 {
349
350 dst->pub_decode = src->pub_decode;
351 dst->pub_encode = src->pub_encode;
352 dst->pub_cmp = src->pub_cmp;
353 dst->pub_print = src->pub_print;
354
355 dst->priv_decode = src->priv_decode;
356 dst->priv_encode = src->priv_encode;
357 dst->priv_print = src->priv_print;
358
359 dst->old_priv_encode = src->old_priv_encode;
360 dst->old_priv_decode = src->old_priv_decode;
361
362 dst->pkey_size = src->pkey_size;
363 dst->pkey_bits = src->pkey_bits;
364
365 dst->param_decode = src->param_decode;
366 dst->param_encode = src->param_encode;
367 dst->param_missing = src->param_missing;
368 dst->param_copy = src->param_copy;
369 dst->param_cmp = src->param_cmp;
370 dst->param_print = src->param_print;
371
372 dst->pkey_free = src->pkey_free;
373 dst->pkey_ctrl = src->pkey_ctrl;
374
375 dst->item_sign = src->item_sign;
376 dst->item_verify = src->item_verify;
377
378 }
379
EVP_PKEY_asn1_free(EVP_PKEY_ASN1_METHOD * ameth)380 void EVP_PKEY_asn1_free(EVP_PKEY_ASN1_METHOD *ameth)
381 {
382 if (ameth && (ameth->pkey_flags & ASN1_PKEY_DYNAMIC)) {
383 if (ameth->pem_str)
384 OPENSSL_free(ameth->pem_str);
385 if (ameth->info)
386 OPENSSL_free(ameth->info);
387 OPENSSL_free(ameth);
388 }
389 }
390
EVP_PKEY_asn1_set_public(EVP_PKEY_ASN1_METHOD * ameth,int (* pub_decode)(EVP_PKEY * pk,X509_PUBKEY * pub),int (* pub_encode)(X509_PUBKEY * pub,const EVP_PKEY * pk),int (* pub_cmp)(const EVP_PKEY * a,const EVP_PKEY * b),int (* pub_print)(BIO * out,const EVP_PKEY * pkey,int indent,ASN1_PCTX * pctx),int (* pkey_size)(const EVP_PKEY * pk),int (* pkey_bits)(const EVP_PKEY * pk))391 void EVP_PKEY_asn1_set_public(EVP_PKEY_ASN1_METHOD *ameth,
392 int (*pub_decode) (EVP_PKEY *pk,
393 X509_PUBKEY *pub),
394 int (*pub_encode) (X509_PUBKEY *pub,
395 const EVP_PKEY *pk),
396 int (*pub_cmp) (const EVP_PKEY *a,
397 const EVP_PKEY *b),
398 int (*pub_print) (BIO *out,
399 const EVP_PKEY *pkey,
400 int indent, ASN1_PCTX *pctx),
401 int (*pkey_size) (const EVP_PKEY *pk),
402 int (*pkey_bits) (const EVP_PKEY *pk))
403 {
404 ameth->pub_decode = pub_decode;
405 ameth->pub_encode = pub_encode;
406 ameth->pub_cmp = pub_cmp;
407 ameth->pub_print = pub_print;
408 ameth->pkey_size = pkey_size;
409 ameth->pkey_bits = pkey_bits;
410 }
411
EVP_PKEY_asn1_set_private(EVP_PKEY_ASN1_METHOD * ameth,int (* priv_decode)(EVP_PKEY * pk,PKCS8_PRIV_KEY_INFO * p8inf),int (* priv_encode)(PKCS8_PRIV_KEY_INFO * p8,const EVP_PKEY * pk),int (* priv_print)(BIO * out,const EVP_PKEY * pkey,int indent,ASN1_PCTX * pctx))412 void EVP_PKEY_asn1_set_private(EVP_PKEY_ASN1_METHOD *ameth,
413 int (*priv_decode) (EVP_PKEY *pk,
414 PKCS8_PRIV_KEY_INFO
415 *p8inf),
416 int (*priv_encode) (PKCS8_PRIV_KEY_INFO *p8,
417 const EVP_PKEY *pk),
418 int (*priv_print) (BIO *out,
419 const EVP_PKEY *pkey,
420 int indent,
421 ASN1_PCTX *pctx))
422 {
423 ameth->priv_decode = priv_decode;
424 ameth->priv_encode = priv_encode;
425 ameth->priv_print = priv_print;
426 }
427
EVP_PKEY_asn1_set_param(EVP_PKEY_ASN1_METHOD * ameth,int (* param_decode)(EVP_PKEY * pkey,const unsigned char ** pder,int derlen),int (* param_encode)(const EVP_PKEY * pkey,unsigned char ** pder),int (* param_missing)(const EVP_PKEY * pk),int (* param_copy)(EVP_PKEY * to,const EVP_PKEY * from),int (* param_cmp)(const EVP_PKEY * a,const EVP_PKEY * b),int (* param_print)(BIO * out,const EVP_PKEY * pkey,int indent,ASN1_PCTX * pctx))428 void EVP_PKEY_asn1_set_param(EVP_PKEY_ASN1_METHOD *ameth,
429 int (*param_decode) (EVP_PKEY *pkey,
430 const unsigned char **pder,
431 int derlen),
432 int (*param_encode) (const EVP_PKEY *pkey,
433 unsigned char **pder),
434 int (*param_missing) (const EVP_PKEY *pk),
435 int (*param_copy) (EVP_PKEY *to,
436 const EVP_PKEY *from),
437 int (*param_cmp) (const EVP_PKEY *a,
438 const EVP_PKEY *b),
439 int (*param_print) (BIO *out,
440 const EVP_PKEY *pkey,
441 int indent, ASN1_PCTX *pctx))
442 {
443 ameth->param_decode = param_decode;
444 ameth->param_encode = param_encode;
445 ameth->param_missing = param_missing;
446 ameth->param_copy = param_copy;
447 ameth->param_cmp = param_cmp;
448 ameth->param_print = param_print;
449 }
450
EVP_PKEY_asn1_set_free(EVP_PKEY_ASN1_METHOD * ameth,void (* pkey_free)(EVP_PKEY * pkey))451 void EVP_PKEY_asn1_set_free(EVP_PKEY_ASN1_METHOD *ameth,
452 void (*pkey_free) (EVP_PKEY *pkey))
453 {
454 ameth->pkey_free = pkey_free;
455 }
456
EVP_PKEY_asn1_set_ctrl(EVP_PKEY_ASN1_METHOD * ameth,int (* pkey_ctrl)(EVP_PKEY * pkey,int op,long arg1,void * arg2))457 void EVP_PKEY_asn1_set_ctrl(EVP_PKEY_ASN1_METHOD *ameth,
458 int (*pkey_ctrl) (EVP_PKEY *pkey, int op,
459 long arg1, void *arg2))
460 {
461 ameth->pkey_ctrl = pkey_ctrl;
462 }
463