1 /*
2 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
3 * 2006.
4 */
5 /* ====================================================================
6 * Copyright (c) 2006-2018 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 #ifndef OPENSSL_NO_CMAC
97 &cmac_asn1_meth,
98 #endif
99 #ifndef OPENSSL_NO_DH
100 &dhx_asn1_meth
101 #endif
102 };
103
104 typedef int sk_cmp_fn_type(const char *const *a, const char *const *b);
105 DECLARE_STACK_OF(EVP_PKEY_ASN1_METHOD)
106 static STACK_OF(EVP_PKEY_ASN1_METHOD) *app_methods = NULL;
107
108 #ifdef TEST
main()109 void main()
110 {
111 int i;
112 for (i = 0;
113 i < sizeof(standard_methods) / sizeof(EVP_PKEY_ASN1_METHOD *); i++)
114 fprintf(stderr, "Number %d id=%d (%s)\n", i,
115 standard_methods[i]->pkey_id,
116 OBJ_nid2sn(standard_methods[i]->pkey_id));
117 }
118 #endif
119
120 DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_ASN1_METHOD *,
121 const EVP_PKEY_ASN1_METHOD *, ameth);
122
ameth_cmp(const EVP_PKEY_ASN1_METHOD * const * a,const EVP_PKEY_ASN1_METHOD * const * b)123 static int ameth_cmp(const EVP_PKEY_ASN1_METHOD *const *a,
124 const EVP_PKEY_ASN1_METHOD *const *b)
125 {
126 return ((*a)->pkey_id - (*b)->pkey_id);
127 }
128
129 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_ASN1_METHOD *,
130 const EVP_PKEY_ASN1_METHOD *, ameth);
131
EVP_PKEY_asn1_get_count(void)132 int EVP_PKEY_asn1_get_count(void)
133 {
134 int num = sizeof(standard_methods) / sizeof(EVP_PKEY_ASN1_METHOD *);
135 if (app_methods)
136 num += sk_EVP_PKEY_ASN1_METHOD_num(app_methods);
137 return num;
138 }
139
EVP_PKEY_asn1_get0(int idx)140 const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_get0(int idx)
141 {
142 int num = sizeof(standard_methods) / sizeof(EVP_PKEY_ASN1_METHOD *);
143 if (idx < 0)
144 return NULL;
145 if (idx < num)
146 return standard_methods[idx];
147 idx -= num;
148 return sk_EVP_PKEY_ASN1_METHOD_value(app_methods, idx);
149 }
150
pkey_asn1_find(int type)151 static const EVP_PKEY_ASN1_METHOD *pkey_asn1_find(int type)
152 {
153 EVP_PKEY_ASN1_METHOD tmp;
154 const EVP_PKEY_ASN1_METHOD *t = &tmp, **ret;
155 tmp.pkey_id = type;
156 if (app_methods) {
157 int idx;
158 idx = sk_EVP_PKEY_ASN1_METHOD_find(app_methods, &tmp);
159 if (idx >= 0)
160 return sk_EVP_PKEY_ASN1_METHOD_value(app_methods, idx);
161 }
162 ret = OBJ_bsearch_ameth(&t, standard_methods, sizeof(standard_methods)
163 / sizeof(EVP_PKEY_ASN1_METHOD *));
164 if (!ret || !*ret)
165 return NULL;
166 return *ret;
167 }
168
169 /*
170 * Find an implementation of an ASN1 algorithm. If 'pe' is not NULL also
171 * search through engines and set *pe to a functional reference to the engine
172 * implementing 'type' or NULL if no engine implements it.
173 */
174
EVP_PKEY_asn1_find(ENGINE ** pe,int type)175 const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_find(ENGINE **pe, int type)
176 {
177 const EVP_PKEY_ASN1_METHOD *t;
178
179 for (;;) {
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 #ifndef OPENSSL_NO_ENGINE
187 ENGINE *e;
188 /* type will contain the final unaliased type */
189 e = ENGINE_get_pkey_asn1_meth_engine(type);
190 if (e) {
191 *pe = e;
192 return ENGINE_get_pkey_asn1_meth(e, type);
193 }
194 #endif
195 *pe = NULL;
196 }
197 return t;
198 }
199
EVP_PKEY_asn1_find_str(ENGINE ** pe,const char * str,int len)200 const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_find_str(ENGINE **pe,
201 const char *str, int len)
202 {
203 int i;
204 const EVP_PKEY_ASN1_METHOD *ameth;
205 if (len == -1)
206 len = strlen(str);
207 if (pe) {
208 #ifndef OPENSSL_NO_ENGINE
209 ENGINE *e;
210 ameth = ENGINE_pkey_asn1_find_str(&e, str, len);
211 if (ameth) {
212 /*
213 * Convert structural into functional reference
214 */
215 if (!ENGINE_init(e))
216 ameth = NULL;
217 ENGINE_free(e);
218 *pe = e;
219 return ameth;
220 }
221 #endif
222 *pe = NULL;
223 }
224 for (i = 0; i < EVP_PKEY_asn1_get_count(); i++) {
225 ameth = EVP_PKEY_asn1_get0(i);
226 if (ameth->pkey_flags & ASN1_PKEY_ALIAS)
227 continue;
228 if (((int)strlen(ameth->pem_str) == len) &&
229 !strncasecmp(ameth->pem_str, str, len))
230 return ameth;
231 }
232 return NULL;
233 }
234
EVP_PKEY_asn1_add0(const EVP_PKEY_ASN1_METHOD * ameth)235 int EVP_PKEY_asn1_add0(const EVP_PKEY_ASN1_METHOD *ameth)
236 {
237 /*
238 * One of the following must be true:
239 *
240 * pem_str == NULL AND ASN1_PKEY_ALIAS is set
241 * pem_str != NULL AND ASN1_PKEY_ALIAS is clear
242 *
243 * Anything else is an error and may lead to a corrupt ASN1 method table
244 */
245 if (!((ameth->pem_str == NULL
246 && (ameth->pkey_flags & ASN1_PKEY_ALIAS) != 0)
247 || (ameth->pem_str != NULL
248 && (ameth->pkey_flags & ASN1_PKEY_ALIAS) == 0))) {
249 return 0;
250 }
251
252 if (app_methods == NULL) {
253 app_methods = sk_EVP_PKEY_ASN1_METHOD_new(ameth_cmp);
254 if (!app_methods)
255 return 0;
256 }
257 if (!sk_EVP_PKEY_ASN1_METHOD_push(app_methods, ameth))
258 return 0;
259 sk_EVP_PKEY_ASN1_METHOD_sort(app_methods);
260 return 1;
261 }
262
EVP_PKEY_asn1_add_alias(int to,int from)263 int EVP_PKEY_asn1_add_alias(int to, int from)
264 {
265 EVP_PKEY_ASN1_METHOD *ameth;
266 ameth = EVP_PKEY_asn1_new(from, ASN1_PKEY_ALIAS, NULL, NULL);
267 if (!ameth)
268 return 0;
269 ameth->pkey_base_id = to;
270 if (!EVP_PKEY_asn1_add0(ameth)) {
271 EVP_PKEY_asn1_free(ameth);
272 return 0;
273 }
274 return 1;
275 }
276
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)277 int EVP_PKEY_asn1_get0_info(int *ppkey_id, int *ppkey_base_id,
278 int *ppkey_flags, const char **pinfo,
279 const char **ppem_str,
280 const EVP_PKEY_ASN1_METHOD *ameth)
281 {
282 if (!ameth)
283 return 0;
284 if (ppkey_id)
285 *ppkey_id = ameth->pkey_id;
286 if (ppkey_base_id)
287 *ppkey_base_id = ameth->pkey_base_id;
288 if (ppkey_flags)
289 *ppkey_flags = ameth->pkey_flags;
290 if (pinfo)
291 *pinfo = ameth->info;
292 if (ppem_str)
293 *ppem_str = ameth->pem_str;
294 return 1;
295 }
296
EVP_PKEY_get0_asn1(EVP_PKEY * pkey)297 const EVP_PKEY_ASN1_METHOD *EVP_PKEY_get0_asn1(EVP_PKEY *pkey)
298 {
299 return pkey->ameth;
300 }
301
EVP_PKEY_asn1_new(int id,int flags,const char * pem_str,const char * info)302 EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_new(int id, int flags,
303 const char *pem_str, const char *info)
304 {
305 EVP_PKEY_ASN1_METHOD *ameth;
306 ameth = OPENSSL_malloc(sizeof(EVP_PKEY_ASN1_METHOD));
307 if (!ameth)
308 return NULL;
309
310 memset(ameth, 0, sizeof(EVP_PKEY_ASN1_METHOD));
311
312 ameth->pkey_id = id;
313 ameth->pkey_base_id = id;
314 ameth->pkey_flags = flags | ASN1_PKEY_DYNAMIC;
315
316 if (info) {
317 ameth->info = BUF_strdup(info);
318 if (!ameth->info)
319 goto err;
320 } else
321 ameth->info = NULL;
322
323 if (pem_str) {
324 ameth->pem_str = BUF_strdup(pem_str);
325 if (!ameth->pem_str)
326 goto err;
327 } else
328 ameth->pem_str = NULL;
329
330 ameth->pub_decode = 0;
331 ameth->pub_encode = 0;
332 ameth->pub_cmp = 0;
333 ameth->pub_print = 0;
334
335 ameth->priv_decode = 0;
336 ameth->priv_encode = 0;
337 ameth->priv_print = 0;
338
339 ameth->old_priv_encode = 0;
340 ameth->old_priv_decode = 0;
341
342 ameth->item_verify = 0;
343 ameth->item_sign = 0;
344
345 ameth->pkey_size = 0;
346 ameth->pkey_bits = 0;
347
348 ameth->param_decode = 0;
349 ameth->param_encode = 0;
350 ameth->param_missing = 0;
351 ameth->param_copy = 0;
352 ameth->param_cmp = 0;
353 ameth->param_print = 0;
354
355 ameth->pkey_free = 0;
356 ameth->pkey_ctrl = 0;
357
358 return ameth;
359
360 err:
361
362 EVP_PKEY_asn1_free(ameth);
363 return NULL;
364
365 }
366
EVP_PKEY_asn1_copy(EVP_PKEY_ASN1_METHOD * dst,const EVP_PKEY_ASN1_METHOD * src)367 void EVP_PKEY_asn1_copy(EVP_PKEY_ASN1_METHOD *dst,
368 const EVP_PKEY_ASN1_METHOD *src)
369 {
370
371 dst->pub_decode = src->pub_decode;
372 dst->pub_encode = src->pub_encode;
373 dst->pub_cmp = src->pub_cmp;
374 dst->pub_print = src->pub_print;
375
376 dst->priv_decode = src->priv_decode;
377 dst->priv_encode = src->priv_encode;
378 dst->priv_print = src->priv_print;
379
380 dst->old_priv_encode = src->old_priv_encode;
381 dst->old_priv_decode = src->old_priv_decode;
382
383 dst->pkey_size = src->pkey_size;
384 dst->pkey_bits = src->pkey_bits;
385
386 dst->param_decode = src->param_decode;
387 dst->param_encode = src->param_encode;
388 dst->param_missing = src->param_missing;
389 dst->param_copy = src->param_copy;
390 dst->param_cmp = src->param_cmp;
391 dst->param_print = src->param_print;
392
393 dst->pkey_free = src->pkey_free;
394 dst->pkey_ctrl = src->pkey_ctrl;
395
396 dst->item_sign = src->item_sign;
397 dst->item_verify = src->item_verify;
398
399 }
400
EVP_PKEY_asn1_free(EVP_PKEY_ASN1_METHOD * ameth)401 void EVP_PKEY_asn1_free(EVP_PKEY_ASN1_METHOD *ameth)
402 {
403 if (ameth && (ameth->pkey_flags & ASN1_PKEY_DYNAMIC)) {
404 if (ameth->pem_str)
405 OPENSSL_free(ameth->pem_str);
406 if (ameth->info)
407 OPENSSL_free(ameth->info);
408 OPENSSL_free(ameth);
409 }
410 }
411
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))412 void EVP_PKEY_asn1_set_public(EVP_PKEY_ASN1_METHOD *ameth,
413 int (*pub_decode) (EVP_PKEY *pk,
414 X509_PUBKEY *pub),
415 int (*pub_encode) (X509_PUBKEY *pub,
416 const EVP_PKEY *pk),
417 int (*pub_cmp) (const EVP_PKEY *a,
418 const EVP_PKEY *b),
419 int (*pub_print) (BIO *out,
420 const EVP_PKEY *pkey,
421 int indent, ASN1_PCTX *pctx),
422 int (*pkey_size) (const EVP_PKEY *pk),
423 int (*pkey_bits) (const EVP_PKEY *pk))
424 {
425 ameth->pub_decode = pub_decode;
426 ameth->pub_encode = pub_encode;
427 ameth->pub_cmp = pub_cmp;
428 ameth->pub_print = pub_print;
429 ameth->pkey_size = pkey_size;
430 ameth->pkey_bits = pkey_bits;
431 }
432
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))433 void EVP_PKEY_asn1_set_private(EVP_PKEY_ASN1_METHOD *ameth,
434 int (*priv_decode) (EVP_PKEY *pk,
435 PKCS8_PRIV_KEY_INFO
436 *p8inf),
437 int (*priv_encode) (PKCS8_PRIV_KEY_INFO *p8,
438 const EVP_PKEY *pk),
439 int (*priv_print) (BIO *out,
440 const EVP_PKEY *pkey,
441 int indent,
442 ASN1_PCTX *pctx))
443 {
444 ameth->priv_decode = priv_decode;
445 ameth->priv_encode = priv_encode;
446 ameth->priv_print = priv_print;
447 }
448
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))449 void EVP_PKEY_asn1_set_param(EVP_PKEY_ASN1_METHOD *ameth,
450 int (*param_decode) (EVP_PKEY *pkey,
451 const unsigned char **pder,
452 int derlen),
453 int (*param_encode) (const EVP_PKEY *pkey,
454 unsigned char **pder),
455 int (*param_missing) (const EVP_PKEY *pk),
456 int (*param_copy) (EVP_PKEY *to,
457 const EVP_PKEY *from),
458 int (*param_cmp) (const EVP_PKEY *a,
459 const EVP_PKEY *b),
460 int (*param_print) (BIO *out,
461 const EVP_PKEY *pkey,
462 int indent, ASN1_PCTX *pctx))
463 {
464 ameth->param_decode = param_decode;
465 ameth->param_encode = param_encode;
466 ameth->param_missing = param_missing;
467 ameth->param_copy = param_copy;
468 ameth->param_cmp = param_cmp;
469 ameth->param_print = param_print;
470 }
471
EVP_PKEY_asn1_set_free(EVP_PKEY_ASN1_METHOD * ameth,void (* pkey_free)(EVP_PKEY * pkey))472 void EVP_PKEY_asn1_set_free(EVP_PKEY_ASN1_METHOD *ameth,
473 void (*pkey_free) (EVP_PKEY *pkey))
474 {
475 ameth->pkey_free = pkey_free;
476 }
477
EVP_PKEY_asn1_set_ctrl(EVP_PKEY_ASN1_METHOD * ameth,int (* pkey_ctrl)(EVP_PKEY * pkey,int op,long arg1,void * arg2))478 void EVP_PKEY_asn1_set_ctrl(EVP_PKEY_ASN1_METHOD *ameth,
479 int (*pkey_ctrl) (EVP_PKEY *pkey, int op,
480 long arg1, void *arg2))
481 {
482 ameth->pkey_ctrl = pkey_ctrl;
483 }
484
EVP_PKEY_asn1_set_item(EVP_PKEY_ASN1_METHOD * ameth,int (* item_verify)(EVP_MD_CTX * ctx,const ASN1_ITEM * it,void * asn,X509_ALGOR * a,ASN1_BIT_STRING * sig,EVP_PKEY * pkey),int (* item_sign)(EVP_MD_CTX * ctx,const ASN1_ITEM * it,void * asn,X509_ALGOR * alg1,X509_ALGOR * alg2,ASN1_BIT_STRING * sig))485 void EVP_PKEY_asn1_set_item(EVP_PKEY_ASN1_METHOD *ameth,
486 int (*item_verify) (EVP_MD_CTX *ctx,
487 const ASN1_ITEM *it,
488 void *asn,
489 X509_ALGOR *a,
490 ASN1_BIT_STRING *sig,
491 EVP_PKEY *pkey),
492 int (*item_sign) (EVP_MD_CTX *ctx,
493 const ASN1_ITEM *it,
494 void *asn,
495 X509_ALGOR *alg1,
496 X509_ALGOR *alg2,
497 ASN1_BIT_STRING *sig))
498 {
499 ameth->item_sign = item_sign;
500 ameth->item_verify = item_verify;
501 }
502