1 /* crypto/asn1/x_pubkey.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/asn1t.h>
62 #include <openssl/x509.h>
63 #ifndef OPENSSL_NO_RSA
64 #include <openssl/rsa.h>
65 #endif
66 #ifndef OPENSSL_NO_DSA
67 #include <openssl/dsa.h>
68 #endif
69
70 /* Minor tweak to operation: free up EVP_PKEY */
pubkey_cb(int operation,ASN1_VALUE ** pval,const ASN1_ITEM * it)71 static int pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it)
72 {
73 if (operation == ASN1_OP_FREE_POST)
74 {
75 X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval;
76 EVP_PKEY_free(pubkey->pkey);
77 }
78 return 1;
79 }
80
81 ASN1_SEQUENCE_cb(X509_PUBKEY, pubkey_cb) = {
82 ASN1_SIMPLE(X509_PUBKEY, algor, X509_ALGOR),
83 ASN1_SIMPLE(X509_PUBKEY, public_key, ASN1_BIT_STRING)
84 } ASN1_SEQUENCE_END_cb(X509_PUBKEY, X509_PUBKEY)
85
86 IMPLEMENT_ASN1_FUNCTIONS(X509_PUBKEY)
87
88 int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey)
89 {
90 X509_PUBKEY *pk=NULL;
91 X509_ALGOR *a;
92 ASN1_OBJECT *o;
93 unsigned char *s,*p = NULL;
94 int i;
95
96 if (x == NULL) return(0);
97
98 if ((pk=X509_PUBKEY_new()) == NULL) goto err;
99 a=pk->algor;
100
101 /* set the algorithm id */
102 if ((o=OBJ_nid2obj(pkey->type)) == NULL) goto err;
103 ASN1_OBJECT_free(a->algorithm);
104 a->algorithm=o;
105
106 /* Set the parameter list */
107 if (!pkey->save_parameters || (pkey->type == EVP_PKEY_RSA))
108 {
109 if ((a->parameter == NULL) ||
110 (a->parameter->type != V_ASN1_NULL))
111 {
112 ASN1_TYPE_free(a->parameter);
113 if (!(a->parameter=ASN1_TYPE_new()))
114 {
115 X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
116 goto err;
117 }
118 a->parameter->type=V_ASN1_NULL;
119 }
120 }
121 #ifndef OPENSSL_NO_DSA
122 else if (pkey->type == EVP_PKEY_DSA)
123 {
124 unsigned char *pp;
125 DSA *dsa;
126
127 dsa=pkey->pkey.dsa;
128 dsa->write_params=0;
129 ASN1_TYPE_free(a->parameter);
130 if ((i=i2d_DSAparams(dsa,NULL)) <= 0)
131 goto err;
132 if (!(p=(unsigned char *)OPENSSL_malloc(i)))
133 {
134 X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
135 goto err;
136 }
137 pp=p;
138 i2d_DSAparams(dsa,&pp);
139 if (!(a->parameter=ASN1_TYPE_new()))
140 {
141 OPENSSL_free(p);
142 X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
143 goto err;
144 }
145 a->parameter->type=V_ASN1_SEQUENCE;
146 if (!(a->parameter->value.sequence=ASN1_STRING_new()))
147 {
148 OPENSSL_free(p);
149 X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
150 goto err;
151 }
152 if (!ASN1_STRING_set(a->parameter->value.sequence,p,i))
153 {
154 OPENSSL_free(p);
155 X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
156 goto err;
157 }
158 OPENSSL_free(p);
159 }
160 #endif
161 #ifndef OPENSSL_NO_EC
162 else if (pkey->type == EVP_PKEY_EC)
163 {
164 int nid=0;
165 unsigned char *pp;
166 EC_KEY *ec_key;
167 const EC_GROUP *group;
168
169 ec_key = pkey->pkey.ec;
170 ASN1_TYPE_free(a->parameter);
171
172 if ((a->parameter = ASN1_TYPE_new()) == NULL)
173 {
174 X509err(X509_F_X509_PUBKEY_SET, ERR_R_ASN1_LIB);
175 goto err;
176 }
177
178 group = EC_KEY_get0_group(ec_key);
179 if (EC_GROUP_get_asn1_flag(group)
180 && (nid = EC_GROUP_get_curve_name(group)))
181 {
182 /* just set the OID */
183 a->parameter->type = V_ASN1_OBJECT;
184 a->parameter->value.object = OBJ_nid2obj(nid);
185 }
186 else /* explicit parameters */
187 {
188 if ((i = i2d_ECParameters(ec_key, NULL)) == 0)
189 {
190 X509err(X509_F_X509_PUBKEY_SET, ERR_R_EC_LIB);
191 goto err;
192 }
193 if ((p = (unsigned char *) OPENSSL_malloc(i)) == NULL)
194 {
195 X509err(X509_F_X509_PUBKEY_SET, ERR_R_MALLOC_FAILURE);
196 goto err;
197 }
198 pp = p;
199 if (!i2d_ECParameters(ec_key, &pp))
200 {
201 X509err(X509_F_X509_PUBKEY_SET, ERR_R_EC_LIB);
202 OPENSSL_free(p);
203 goto err;
204 }
205 a->parameter->type = V_ASN1_SEQUENCE;
206 if ((a->parameter->value.sequence = ASN1_STRING_new()) == NULL)
207 {
208 X509err(X509_F_X509_PUBKEY_SET, ERR_R_ASN1_LIB);
209 OPENSSL_free(p);
210 goto err;
211 }
212 ASN1_STRING_set(a->parameter->value.sequence, p, i);
213 OPENSSL_free(p);
214 }
215 }
216 #endif
217 else if (1)
218 {
219 X509err(X509_F_X509_PUBKEY_SET,X509_R_UNSUPPORTED_ALGORITHM);
220 goto err;
221 }
222
223 if ((i=i2d_PublicKey(pkey,NULL)) <= 0) goto err;
224 if ((s=(unsigned char *)OPENSSL_malloc(i+1)) == NULL)
225 {
226 X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
227 goto err;
228 }
229 p=s;
230 i2d_PublicKey(pkey,&p);
231 if (!M_ASN1_BIT_STRING_set(pk->public_key,s,i))
232 {
233 X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
234 goto err;
235 }
236 /* Set number of unused bits to zero */
237 pk->public_key->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
238 pk->public_key->flags|=ASN1_STRING_FLAG_BITS_LEFT;
239
240 OPENSSL_free(s);
241
242 #if 0
243 CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
244 pk->pkey=pkey;
245 #endif
246
247 if (*x != NULL)
248 X509_PUBKEY_free(*x);
249
250 *x=pk;
251
252 return 1;
253 err:
254 if (pk != NULL) X509_PUBKEY_free(pk);
255 return 0;
256 }
257
X509_PUBKEY_get(X509_PUBKEY * key)258 EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key)
259 {
260 EVP_PKEY *ret=NULL;
261 long j;
262 int type;
263 const unsigned char *p;
264 #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
265 const unsigned char *cp;
266 X509_ALGOR *a;
267 #endif
268
269 if (key == NULL) goto err;
270
271 if (key->pkey != NULL)
272 {
273 CRYPTO_add(&key->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
274 return(key->pkey);
275 }
276
277 if (key->public_key == NULL) goto err;
278
279 type=OBJ_obj2nid(key->algor->algorithm);
280 if ((ret = EVP_PKEY_new()) == NULL)
281 {
282 X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE);
283 goto err;
284 }
285 ret->type = EVP_PKEY_type(type);
286
287 /* the parameters must be extracted before the public key (ECDSA!) */
288
289 #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
290 a=key->algor;
291 #endif
292
293 if (0)
294 ;
295 #ifndef OPENSSL_NO_DSA
296 else if (ret->type == EVP_PKEY_DSA)
297 {
298 if (a->parameter && (a->parameter->type == V_ASN1_SEQUENCE))
299 {
300 if ((ret->pkey.dsa = DSA_new()) == NULL)
301 {
302 X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE);
303 goto err;
304 }
305 ret->pkey.dsa->write_params=0;
306 cp=p=a->parameter->value.sequence->data;
307 j=a->parameter->value.sequence->length;
308 if (!d2i_DSAparams(&ret->pkey.dsa, &cp, (long)j))
309 goto err;
310 }
311 ret->save_parameters=1;
312 }
313 #endif
314 #ifndef OPENSSL_NO_EC
315 else if (ret->type == EVP_PKEY_EC)
316 {
317 if (a->parameter && (a->parameter->type == V_ASN1_SEQUENCE))
318 {
319 /* type == V_ASN1_SEQUENCE => we have explicit parameters
320 * (e.g. parameters in the X9_62_EC_PARAMETERS-structure )
321 */
322 if ((ret->pkey.ec= EC_KEY_new()) == NULL)
323 {
324 X509err(X509_F_X509_PUBKEY_GET,
325 ERR_R_MALLOC_FAILURE);
326 goto err;
327 }
328 cp = p = a->parameter->value.sequence->data;
329 j = a->parameter->value.sequence->length;
330 if (!d2i_ECParameters(&ret->pkey.ec, &cp, (long)j))
331 {
332 X509err(X509_F_X509_PUBKEY_GET, ERR_R_EC_LIB);
333 goto err;
334 }
335 }
336 else if (a->parameter && (a->parameter->type == V_ASN1_OBJECT))
337 {
338 /* type == V_ASN1_OBJECT => the parameters are given
339 * by an asn1 OID
340 */
341 EC_KEY *ec_key;
342 EC_GROUP *group;
343
344 if (ret->pkey.ec == NULL)
345 ret->pkey.ec = EC_KEY_new();
346 ec_key = ret->pkey.ec;
347 if (ec_key == NULL)
348 goto err;
349 group = EC_GROUP_new_by_curve_name(OBJ_obj2nid(a->parameter->value.object));
350 if (group == NULL)
351 goto err;
352 EC_GROUP_set_asn1_flag(group, OPENSSL_EC_NAMED_CURVE);
353 if (EC_KEY_set_group(ec_key, group) == 0)
354 goto err;
355 EC_GROUP_free(group);
356 }
357 /* the case implicitlyCA is currently not implemented */
358 ret->save_parameters = 1;
359 }
360 #endif
361
362 p=key->public_key->data;
363 j=key->public_key->length;
364 if (!d2i_PublicKey(type, &ret, &p, (long)j))
365 {
366 X509err(X509_F_X509_PUBKEY_GET, X509_R_ERR_ASN1_LIB);
367 goto err;
368 }
369
370 key->pkey = ret;
371 CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_EVP_PKEY);
372 return(ret);
373 err:
374 if (ret != NULL)
375 EVP_PKEY_free(ret);
376 return(NULL);
377 }
378
379 /* Now two pseudo ASN1 routines that take an EVP_PKEY structure
380 * and encode or decode as X509_PUBKEY
381 */
382
d2i_PUBKEY(EVP_PKEY ** a,const unsigned char ** pp,long length)383 EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp,
384 long length)
385 {
386 X509_PUBKEY *xpk;
387 EVP_PKEY *pktmp;
388 xpk = d2i_X509_PUBKEY(NULL, pp, length);
389 if(!xpk) return NULL;
390 pktmp = X509_PUBKEY_get(xpk);
391 X509_PUBKEY_free(xpk);
392 if(!pktmp) return NULL;
393 if(a)
394 {
395 EVP_PKEY_free(*a);
396 *a = pktmp;
397 }
398 return pktmp;
399 }
400
i2d_PUBKEY(EVP_PKEY * a,unsigned char ** pp)401 int i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp)
402 {
403 X509_PUBKEY *xpk=NULL;
404 int ret;
405 if(!a) return 0;
406 if(!X509_PUBKEY_set(&xpk, a)) return 0;
407 ret = i2d_X509_PUBKEY(xpk, pp);
408 X509_PUBKEY_free(xpk);
409 return ret;
410 }
411
412 /* The following are equivalents but which return RSA and DSA
413 * keys
414 */
415 #ifndef OPENSSL_NO_RSA
d2i_RSA_PUBKEY(RSA ** a,const unsigned char ** pp,long length)416 RSA *d2i_RSA_PUBKEY(RSA **a, const unsigned char **pp,
417 long length)
418 {
419 EVP_PKEY *pkey;
420 RSA *key;
421 const unsigned char *q;
422 q = *pp;
423 pkey = d2i_PUBKEY(NULL, &q, length);
424 if (!pkey) return NULL;
425 key = EVP_PKEY_get1_RSA(pkey);
426 EVP_PKEY_free(pkey);
427 if (!key) return NULL;
428 *pp = q;
429 if (a)
430 {
431 RSA_free(*a);
432 *a = key;
433 }
434 return key;
435 }
436
i2d_RSA_PUBKEY(RSA * a,unsigned char ** pp)437 int i2d_RSA_PUBKEY(RSA *a, unsigned char **pp)
438 {
439 EVP_PKEY *pktmp;
440 int ret;
441 if (!a) return 0;
442 pktmp = EVP_PKEY_new();
443 if (!pktmp)
444 {
445 ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE);
446 return 0;
447 }
448 EVP_PKEY_set1_RSA(pktmp, a);
449 ret = i2d_PUBKEY(pktmp, pp);
450 EVP_PKEY_free(pktmp);
451 return ret;
452 }
453 #endif
454
455 #ifndef OPENSSL_NO_DSA
d2i_DSA_PUBKEY(DSA ** a,const unsigned char ** pp,long length)456 DSA *d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp,
457 long length)
458 {
459 EVP_PKEY *pkey;
460 DSA *key;
461 const unsigned char *q;
462 q = *pp;
463 pkey = d2i_PUBKEY(NULL, &q, length);
464 if (!pkey) return NULL;
465 key = EVP_PKEY_get1_DSA(pkey);
466 EVP_PKEY_free(pkey);
467 if (!key) return NULL;
468 *pp = q;
469 if (a)
470 {
471 DSA_free(*a);
472 *a = key;
473 }
474 return key;
475 }
476
i2d_DSA_PUBKEY(DSA * a,unsigned char ** pp)477 int i2d_DSA_PUBKEY(DSA *a, unsigned char **pp)
478 {
479 EVP_PKEY *pktmp;
480 int ret;
481 if(!a) return 0;
482 pktmp = EVP_PKEY_new();
483 if(!pktmp)
484 {
485 ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE);
486 return 0;
487 }
488 EVP_PKEY_set1_DSA(pktmp, a);
489 ret = i2d_PUBKEY(pktmp, pp);
490 EVP_PKEY_free(pktmp);
491 return ret;
492 }
493 #endif
494
495 #ifndef OPENSSL_NO_EC
d2i_EC_PUBKEY(EC_KEY ** a,const unsigned char ** pp,long length)496 EC_KEY *d2i_EC_PUBKEY(EC_KEY **a, const unsigned char **pp, long length)
497 {
498 EVP_PKEY *pkey;
499 EC_KEY *key;
500 const unsigned char *q;
501 q = *pp;
502 pkey = d2i_PUBKEY(NULL, &q, length);
503 if (!pkey) return(NULL);
504 key = EVP_PKEY_get1_EC_KEY(pkey);
505 EVP_PKEY_free(pkey);
506 if (!key) return(NULL);
507 *pp = q;
508 if (a)
509 {
510 EC_KEY_free(*a);
511 *a = key;
512 }
513 return(key);
514 }
515
i2d_EC_PUBKEY(EC_KEY * a,unsigned char ** pp)516 int i2d_EC_PUBKEY(EC_KEY *a, unsigned char **pp)
517 {
518 EVP_PKEY *pktmp;
519 int ret;
520 if (!a) return(0);
521 if ((pktmp = EVP_PKEY_new()) == NULL)
522 {
523 ASN1err(ASN1_F_I2D_EC_PUBKEY, ERR_R_MALLOC_FAILURE);
524 return(0);
525 }
526 EVP_PKEY_set1_EC_KEY(pktmp, a);
527 ret = i2d_PUBKEY(pktmp, pp);
528 EVP_PKEY_free(pktmp);
529 return(ret);
530 }
531 #endif
532