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diff --git a/src/lib/libcrypto/asn1/x_pubkey.c b/src/lib/libcrypto/asn1/x_pubkey.c
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1/* $OpenBSD: x_pubkey.c,v 1.25 2015/02/11 04:00:39 jsing Exp $ */
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
61#include <openssl/opensslconf.h>
62
63#include <openssl/asn1t.h>
64#include <openssl/err.h>
65#include <openssl/x509.h>
66
67#ifndef OPENSSL_NO_DSA
68#include <openssl/dsa.h>
69#endif
70#ifndef OPENSSL_NO_RSA
71#include <openssl/rsa.h>
72#endif
73
74#include "asn1_locl.h"
75
76/* Minor tweak to operation: free up EVP_PKEY */
77static int
78pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg)
79{
80 if (operation == ASN1_OP_FREE_POST) {
81 X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval;
82 EVP_PKEY_free(pubkey->pkey);
83 }
84 return 1;
85}
86
87static const ASN1_AUX X509_PUBKEY_aux = {
88 .asn1_cb = pubkey_cb,
89};
90static const ASN1_TEMPLATE X509_PUBKEY_seq_tt[] = {
91 {
92 .offset = offsetof(X509_PUBKEY, algor),
93 .field_name = "algor",
94 .item = &X509_ALGOR_it,
95 },
96 {
97 .offset = offsetof(X509_PUBKEY, public_key),
98 .field_name = "public_key",
99 .item = &ASN1_BIT_STRING_it,
100 },
101};
102
103const ASN1_ITEM X509_PUBKEY_it = {
104 .itype = ASN1_ITYPE_SEQUENCE,
105 .utype = V_ASN1_SEQUENCE,
106 .templates = X509_PUBKEY_seq_tt,
107 .tcount = sizeof(X509_PUBKEY_seq_tt) / sizeof(ASN1_TEMPLATE),
108 .funcs = &X509_PUBKEY_aux,
109 .size = sizeof(X509_PUBKEY),
110 .sname = "X509_PUBKEY",
111};
112
113
114X509_PUBKEY *
115d2i_X509_PUBKEY(X509_PUBKEY **a, const unsigned char **in, long len)
116{
117 return (X509_PUBKEY *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
118 &X509_PUBKEY_it);
119}
120
121int
122i2d_X509_PUBKEY(X509_PUBKEY *a, unsigned char **out)
123{
124 return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_PUBKEY_it);
125}
126
127X509_PUBKEY *
128X509_PUBKEY_new(void)
129{
130 return (X509_PUBKEY *)ASN1_item_new(&X509_PUBKEY_it);
131}
132
133void
134X509_PUBKEY_free(X509_PUBKEY *a)
135{
136 ASN1_item_free((ASN1_VALUE *)a, &X509_PUBKEY_it);
137}
138
139int
140X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey)
141{
142 X509_PUBKEY *pk = NULL;
143
144 if (x == NULL)
145 return (0);
146 if ((pk = X509_PUBKEY_new()) == NULL)
147 goto error;
148
149 if (pkey->ameth) {
150 if (pkey->ameth->pub_encode) {
151 if (!pkey->ameth->pub_encode(pk, pkey)) {
152 X509err(X509_F_X509_PUBKEY_SET,
153 X509_R_PUBLIC_KEY_ENCODE_ERROR);
154 goto error;
155 }
156 } else {
157 X509err(X509_F_X509_PUBKEY_SET,
158 X509_R_METHOD_NOT_SUPPORTED);
159 goto error;
160 }
161 } else {
162 X509err(X509_F_X509_PUBKEY_SET, X509_R_UNSUPPORTED_ALGORITHM);
163 goto error;
164 }
165
166 if (*x != NULL)
167 X509_PUBKEY_free(*x);
168
169 *x = pk;
170
171 return 1;
172
173error:
174 if (pk != NULL)
175 X509_PUBKEY_free(pk);
176 return 0;
177}
178
179EVP_PKEY *
180X509_PUBKEY_get(X509_PUBKEY *key)
181{
182 EVP_PKEY *ret = NULL;
183
184 if (key == NULL)
185 goto error;
186
187 if (key->pkey != NULL) {
188 CRYPTO_add(&key->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
189 return key->pkey;
190 }
191
192 if (key->public_key == NULL)
193 goto error;
194
195 if ((ret = EVP_PKEY_new()) == NULL) {
196 X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE);
197 goto error;
198 }
199
200 if (!EVP_PKEY_set_type(ret, OBJ_obj2nid(key->algor->algorithm))) {
201 X509err(X509_F_X509_PUBKEY_GET, X509_R_UNSUPPORTED_ALGORITHM);
202 goto error;
203 }
204
205 if (ret->ameth->pub_decode) {
206 if (!ret->ameth->pub_decode(ret, key)) {
207 X509err(X509_F_X509_PUBKEY_GET,
208 X509_R_PUBLIC_KEY_DECODE_ERROR);
209 goto error;
210 }
211 } else {
212 X509err(X509_F_X509_PUBKEY_GET, X509_R_METHOD_NOT_SUPPORTED);
213 goto error;
214 }
215
216 /* Check to see if another thread set key->pkey first */
217 CRYPTO_w_lock(CRYPTO_LOCK_EVP_PKEY);
218 if (key->pkey) {
219 CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY);
220 EVP_PKEY_free(ret);
221 ret = key->pkey;
222 } else {
223 key->pkey = ret;
224 CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY);
225 }
226 CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_EVP_PKEY);
227
228 return ret;
229
230error:
231 EVP_PKEY_free(ret);
232 return (NULL);
233}
234
235/* Now two pseudo ASN1 routines that take an EVP_PKEY structure
236 * and encode or decode as X509_PUBKEY
237 */
238
239EVP_PKEY *
240d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp, long length)
241{
242 X509_PUBKEY *xpk;
243 EVP_PKEY *pktmp;
244 xpk = d2i_X509_PUBKEY(NULL, pp, length);
245 if (!xpk)
246 return NULL;
247 pktmp = X509_PUBKEY_get(xpk);
248 X509_PUBKEY_free(xpk);
249 if (!pktmp)
250 return NULL;
251 if (a) {
252 EVP_PKEY_free(*a);
253 *a = pktmp;
254 }
255 return pktmp;
256}
257
258int
259i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp)
260{
261 X509_PUBKEY *xpk = NULL;
262 int ret;
263 if (!a)
264 return 0;
265 if (!X509_PUBKEY_set(&xpk, a))
266 return 0;
267 ret = i2d_X509_PUBKEY(xpk, pp);
268 X509_PUBKEY_free(xpk);
269 return ret;
270}
271
272/* The following are equivalents but which return RSA and DSA
273 * keys
274 */
275#ifndef OPENSSL_NO_RSA
276RSA *
277d2i_RSA_PUBKEY(RSA **a, const unsigned char **pp, long length)
278{
279 EVP_PKEY *pkey;
280 RSA *key;
281 const unsigned char *q;
282 q = *pp;
283 pkey = d2i_PUBKEY(NULL, &q, length);
284 if (!pkey)
285 return NULL;
286 key = EVP_PKEY_get1_RSA(pkey);
287 EVP_PKEY_free(pkey);
288 if (!key)
289 return NULL;
290 *pp = q;
291 if (a) {
292 RSA_free(*a);
293 *a = key;
294 }
295 return key;
296}
297
298int
299i2d_RSA_PUBKEY(RSA *a, unsigned char **pp)
300{
301 EVP_PKEY *pktmp;
302 int ret;
303 if (!a)
304 return 0;
305 pktmp = EVP_PKEY_new();
306 if (!pktmp) {
307 ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE);
308 return 0;
309 }
310 EVP_PKEY_set1_RSA(pktmp, a);
311 ret = i2d_PUBKEY(pktmp, pp);
312 EVP_PKEY_free(pktmp);
313 return ret;
314}
315#endif
316
317#ifndef OPENSSL_NO_DSA
318DSA *
319d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp, long length)
320{
321 EVP_PKEY *pkey;
322 DSA *key;
323 const unsigned char *q;
324 q = *pp;
325 pkey = d2i_PUBKEY(NULL, &q, length);
326 if (!pkey)
327 return NULL;
328 key = EVP_PKEY_get1_DSA(pkey);
329 EVP_PKEY_free(pkey);
330 if (!key)
331 return NULL;
332 *pp = q;
333 if (a) {
334 DSA_free(*a);
335 *a = key;
336 }
337 return key;
338}
339
340int
341i2d_DSA_PUBKEY(DSA *a, unsigned char **pp)
342{
343 EVP_PKEY *pktmp;
344 int ret;
345 if (!a)
346 return 0;
347 pktmp = EVP_PKEY_new();
348 if (!pktmp) {
349 ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE);
350 return 0;
351 }
352 EVP_PKEY_set1_DSA(pktmp, a);
353 ret = i2d_PUBKEY(pktmp, pp);
354 EVP_PKEY_free(pktmp);
355 return ret;
356}
357#endif
358
359#ifndef OPENSSL_NO_EC
360EC_KEY *
361d2i_EC_PUBKEY(EC_KEY **a, const unsigned char **pp, long length)
362{
363 EVP_PKEY *pkey;
364 EC_KEY *key;
365 const unsigned char *q;
366 q = *pp;
367 pkey = d2i_PUBKEY(NULL, &q, length);
368 if (!pkey)
369 return (NULL);
370 key = EVP_PKEY_get1_EC_KEY(pkey);
371 EVP_PKEY_free(pkey);
372 if (!key)
373 return (NULL);
374 *pp = q;
375 if (a) {
376 EC_KEY_free(*a);
377 *a = key;
378 }
379 return (key);
380}
381
382int
383i2d_EC_PUBKEY(EC_KEY *a, unsigned char **pp)
384{
385 EVP_PKEY *pktmp;
386 int ret;
387 if (!a)
388 return (0);
389 if ((pktmp = EVP_PKEY_new()) == NULL) {
390 ASN1err(ASN1_F_I2D_EC_PUBKEY, ERR_R_MALLOC_FAILURE);
391 return (0);
392 }
393 EVP_PKEY_set1_EC_KEY(pktmp, a);
394 ret = i2d_PUBKEY(pktmp, pp);
395 EVP_PKEY_free(pktmp);
396 return (ret);
397}
398#endif
399
400int
401X509_PUBKEY_set0_param(X509_PUBKEY *pub, ASN1_OBJECT *aobj, int ptype,
402 void *pval, unsigned char *penc, int penclen)
403{
404 if (!X509_ALGOR_set0(pub->algor, aobj, ptype, pval))
405 return 0;
406 if (penc) {
407 free(pub->public_key->data);
408 pub->public_key->data = penc;
409 pub->public_key->length = penclen;
410 /* Set number of unused bits to zero */
411 pub->public_key->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
412 pub->public_key->flags |= ASN1_STRING_FLAG_BITS_LEFT;
413 }
414 return 1;
415}
416
417int
418X509_PUBKEY_get0_param(ASN1_OBJECT **ppkalg, const unsigned char **pk,
419 int *ppklen, X509_ALGOR **pa, X509_PUBKEY *pub)
420{
421 if (ppkalg)
422 *ppkalg = pub->algor->algorithm;
423 if (pk) {
424 *pk = pub->public_key->data;
425 *ppklen = pub->public_key->length;
426 }
427 if (pa)
428 *pa = pub->algor;
429 return 1;
430}
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