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 #include "asn1_locl.h"
64 #ifndef OPENSSL_NO_RSA
65 #include <openssl/rsa.h>
66 #endif
67 #ifndef OPENSSL_NO_DSA
68 #include <openssl/dsa.h>
69 #endif
70
71 /* Minor tweak to operation: free up EVP_PKEY */
72 static int pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
73 void *exarg)
74 {
75 if (operation == ASN1_OP_FREE_POST)
76 {
77 X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval;
78 EVP_PKEY_free(pubkey->pkey);
79 }
80 return 1;
81 }
82
83 ASN1_SEQUENCE_cb(X509_PUBKEY, pubkey_cb) = {
84 ASN1_SIMPLE(X509_PUBKEY, algor, X509_ALGOR),
85 ASN1_SIMPLE(X509_PUBKEY, public_key, ASN1_BIT_STRING)
86 } ASN1_SEQUENCE_END_cb(X509_PUBKEY, X509_PUBKEY)
87
88 IMPLEMENT_ASN1_FUNCTIONS(X509_PUBKEY)
89
90 int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey)
91 {
92 X509_PUBKEY *pk=NULL;
93
94 if (x == NULL) return(0);
95
96 if ((pk=X509_PUBKEY_new()) == NULL) goto error;
97
98 if (pkey->ameth)
99 {
100 if (pkey->ameth->pub_encode)
101 {
102 if (!pkey->ameth->pub_encode(pk, pkey))
103 {
104 X509err(X509_F_X509_PUBKEY_SET,
105 X509_R_PUBLIC_KEY_ENCODE_ERROR);
106 goto error;
107 }
108 }
109 else
110 {
111 X509err(X509_F_X509_PUBKEY_SET,
112 X509_R_METHOD_NOT_SUPPORTED);
113 goto error;
114 }
115 }
116 else
117 {
118 X509err(X509_F_X509_PUBKEY_SET,X509_R_UNSUPPORTED_ALGORITHM);
119 goto error;
120 }
121
122 if (*x != NULL)
123 X509_PUBKEY_free(*x);
124
125 *x=pk;
126
127 return 1;
128 error:
129 if (pk != NULL) X509_PUBKEY_free(pk);
130 return 0;
131 }
132
133 EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key)
134 {
135 EVP_PKEY *ret=NULL;
136
137 if (key == NULL) goto error;
138
139 if (key->pkey != NULL)
140 {
141 CRYPTO_add(&key->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
142 return key->pkey;
143 }
144
145 if (key->public_key == NULL) goto error;
146
147 if ((ret = EVP_PKEY_new()) == NULL)
148 {
149 X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE);
150 goto error;
151 }
152
153 if (!EVP_PKEY_set_type(ret, OBJ_obj2nid(key->algor->algorithm)))
154 {
155 X509err(X509_F_X509_PUBKEY_GET,X509_R_UNSUPPORTED_ALGORITHM);
156 goto error;
157 }
158
159 if (ret->ameth->pub_decode)
160 {
161 if (!ret->ameth->pub_decode(ret, key))
162 {
163 X509err(X509_F_X509_PUBKEY_GET,
164 X509_R_PUBLIC_KEY_DECODE_ERROR);
165 goto error;
166 }
167 }
168 else
169 {
170 X509err(X509_F_X509_PUBKEY_GET, X509_R_METHOD_NOT_SUPPORTED);
171 goto error;
172 }
173
174 /* Check to see if another thread set key->pkey first */
175 CRYPTO_w_lock(CRYPTO_LOCK_EVP_PKEY);
176 if (key->pkey)
177 {
178 CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY);
179 EVP_PKEY_free(ret);
180 ret = key->pkey;
181 }
182 else
183 {
184 key->pkey = ret;
185 CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY);
186 }
187 CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_EVP_PKEY);
188
189 return ret;
190
191 error:
192 if (ret != NULL)
193 EVP_PKEY_free(ret);
194 return(NULL);
195 }
196
197 /* Now two pseudo ASN1 routines that take an EVP_PKEY structure
198 * and encode or decode as X509_PUBKEY
199 */
200
201 EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp,
202 long length)
203 {
204 X509_PUBKEY *xpk;
205 EVP_PKEY *pktmp;
206 xpk = d2i_X509_PUBKEY(NULL, pp, length);
207 if(!xpk) return NULL;
208 pktmp = X509_PUBKEY_get(xpk);
209 X509_PUBKEY_free(xpk);
210 if(!pktmp) return NULL;
211 if(a)
212 {
213 EVP_PKEY_free(*a);
214 *a = pktmp;
215 }
216 return pktmp;
217 }
218
219 int i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp)
220 {
221 X509_PUBKEY *xpk=NULL;
222 int ret;
223 if(!a) return 0;
224 if(!X509_PUBKEY_set(&xpk, a)) return 0;
225 ret = i2d_X509_PUBKEY(xpk, pp);
226 X509_PUBKEY_free(xpk);
227 return ret;
228 }
229
230 /* The following are equivalents but which return RSA and DSA
231 * keys
232 */
233 #ifndef OPENSSL_NO_RSA
234 RSA *d2i_RSA_PUBKEY(RSA **a, const unsigned char **pp,
235 long length)
236 {
237 EVP_PKEY *pkey;
238 RSA *key;
239 const unsigned char *q;
240 q = *pp;
241 pkey = d2i_PUBKEY(NULL, &q, length);
242 if (!pkey) return NULL;
243 key = EVP_PKEY_get1_RSA(pkey);
244 EVP_PKEY_free(pkey);
245 if (!key) return NULL;
246 *pp = q;
247 if (a)
248 {
249 RSA_free(*a);
250 *a = key;
251 }
252 return key;
253 }
254
255 int i2d_RSA_PUBKEY(RSA *a, unsigned char **pp)
256 {
257 EVP_PKEY *pktmp;
258 int ret;
259 if (!a) return 0;
260 pktmp = EVP_PKEY_new();
261 if (!pktmp)
262 {
263 ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE);
264 return 0;
265 }
266 EVP_PKEY_set1_RSA(pktmp, a);
267 ret = i2d_PUBKEY(pktmp, pp);
268 EVP_PKEY_free(pktmp);
269 return ret;
270 }
271 #endif
272
273 #ifndef OPENSSL_NO_DSA
274 DSA *d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp,
275 long length)
276 {
277 EVP_PKEY *pkey;
278 DSA *key;
279 const unsigned char *q;
280 q = *pp;
281 pkey = d2i_PUBKEY(NULL, &q, length);
282 if (!pkey) return NULL;
283 key = EVP_PKEY_get1_DSA(pkey);
284 EVP_PKEY_free(pkey);
285 if (!key) return NULL;
286 *pp = q;
287 if (a)
288 {
289 DSA_free(*a);
290 *a = key;
291 }
292 return key;
293 }
294
295 int i2d_DSA_PUBKEY(DSA *a, unsigned char **pp)
296 {
297 EVP_PKEY *pktmp;
298 int ret;
299 if(!a) return 0;
300 pktmp = EVP_PKEY_new();
301 if(!pktmp)
302 {
303 ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE);
304 return 0;
305 }
306 EVP_PKEY_set1_DSA(pktmp, a);
307 ret = i2d_PUBKEY(pktmp, pp);
308 EVP_PKEY_free(pktmp);
309 return ret;
310 }
311 #endif
312
313 #ifndef OPENSSL_NO_EC
314 EC_KEY *d2i_EC_PUBKEY(EC_KEY **a, const unsigned char **pp, long length)
315 {
316 EVP_PKEY *pkey;
317 EC_KEY *key;
318 const unsigned char *q;
319 q = *pp;
320 pkey = d2i_PUBKEY(NULL, &q, length);
321 if (!pkey) return(NULL);
322 key = EVP_PKEY_get1_EC_KEY(pkey);
323 EVP_PKEY_free(pkey);
324 if (!key) return(NULL);
325 *pp = q;
326 if (a)
327 {
328 EC_KEY_free(*a);
329 *a = key;
330 }
331 return(key);
332 }
333
334 int i2d_EC_PUBKEY(EC_KEY *a, unsigned char **pp)
335 {
336 EVP_PKEY *pktmp;
337 int ret;
338 if (!a) return(0);
339 if ((pktmp = EVP_PKEY_new()) == NULL)
340 {
341 ASN1err(ASN1_F_I2D_EC_PUBKEY, ERR_R_MALLOC_FAILURE);
342 return(0);
343 }
344 EVP_PKEY_set1_EC_KEY(pktmp, a);
345 ret = i2d_PUBKEY(pktmp, pp);
346 EVP_PKEY_free(pktmp);
347 return(ret);
348 }
349 #endif
350
351 int X509_PUBKEY_set0_param(X509_PUBKEY *pub, ASN1_OBJECT *aobj,
352 int ptype, void *pval,
353 unsigned char *penc, int penclen)
354 {
355 if (!X509_ALGOR_set0(pub->algor, aobj, ptype, pval))
356 return 0;
357 if (penc)
358 {
359 if (pub->public_key->data)
360 OPENSSL_free(pub->public_key->data);
361 pub->public_key->data = penc;
362 pub->public_key->length = penclen;
363 /* Set number of unused bits to zero */
364 pub->public_key->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
365 pub->public_key->flags|=ASN1_STRING_FLAG_BITS_LEFT;
366 }
367 return 1;
368 }
369
370 int X509_PUBKEY_get0_param(ASN1_OBJECT **ppkalg,
371 const unsigned char **pk, int *ppklen,
372 X509_ALGOR **pa,
373 X509_PUBKEY *pub)
374 {
375 if (ppkalg)
376 *ppkalg = pub->algor->algorithm;
377 if (pk)
378 {
379 *pk = pub->public_key->data;
380 *ppklen = pub->public_key->length;
381 }
382 if (pa)
383 *pa = pub->algor;
384 return 1;
385 }