Line data Source code
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 10086 : static int pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
73 : void *exarg)
74 : {
75 10086 : if (operation == ASN1_OP_FREE_POST) {
76 1681 : X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval;
77 1681 : EVP_PKEY_free(pubkey->pkey);
78 : }
79 10086 : return 1;
80 : }
81 :
82 : ASN1_SEQUENCE_cb(X509_PUBKEY, pubkey_cb) = {
83 : ASN1_SIMPLE(X509_PUBKEY, algor, X509_ALGOR),
84 : ASN1_SIMPLE(X509_PUBKEY, public_key, ASN1_BIT_STRING)
85 : } ASN1_SEQUENCE_END_cb(X509_PUBKEY, X509_PUBKEY)
86 :
87 0 : IMPLEMENT_ASN1_FUNCTIONS(X509_PUBKEY)
88 :
89 0 : int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey)
90 : {
91 : X509_PUBKEY *pk = NULL;
92 :
93 0 : if (x == NULL)
94 : return (0);
95 :
96 0 : if ((pk = X509_PUBKEY_new()) == NULL)
97 : goto error;
98 :
99 0 : if (pkey->ameth) {
100 0 : if (pkey->ameth->pub_encode) {
101 0 : if (!pkey->ameth->pub_encode(pk, pkey)) {
102 0 : X509err(X509_F_X509_PUBKEY_SET,
103 : X509_R_PUBLIC_KEY_ENCODE_ERROR);
104 0 : goto error;
105 : }
106 : } else {
107 0 : X509err(X509_F_X509_PUBKEY_SET, X509_R_METHOD_NOT_SUPPORTED);
108 0 : goto error;
109 : }
110 : } else {
111 0 : X509err(X509_F_X509_PUBKEY_SET, X509_R_UNSUPPORTED_ALGORITHM);
112 0 : goto error;
113 : }
114 :
115 0 : if (*x != NULL)
116 : X509_PUBKEY_free(*x);
117 :
118 0 : *x = pk;
119 :
120 0 : return 1;
121 : error:
122 0 : if (pk != NULL)
123 : X509_PUBKEY_free(pk);
124 : return 0;
125 : }
126 :
127 4349 : EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key)
128 : {
129 : EVP_PKEY *ret = NULL;
130 :
131 4349 : if (key == NULL)
132 : goto error;
133 :
134 4349 : if (key->pkey != NULL) {
135 3210 : CRYPTO_add(&key->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
136 3210 : return key->pkey;
137 : }
138 :
139 1139 : if (key->public_key == NULL)
140 : goto error;
141 :
142 1139 : if ((ret = EVP_PKEY_new()) == NULL) {
143 0 : X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE);
144 0 : goto error;
145 : }
146 :
147 1139 : if (!EVP_PKEY_set_type(ret, OBJ_obj2nid(key->algor->algorithm))) {
148 0 : X509err(X509_F_X509_PUBKEY_GET, X509_R_UNSUPPORTED_ALGORITHM);
149 0 : goto error;
150 : }
151 :
152 1139 : if (ret->ameth->pub_decode) {
153 1139 : if (!ret->ameth->pub_decode(ret, key)) {
154 0 : X509err(X509_F_X509_PUBKEY_GET, X509_R_PUBLIC_KEY_DECODE_ERROR);
155 0 : goto error;
156 : }
157 : } else {
158 0 : X509err(X509_F_X509_PUBKEY_GET, X509_R_METHOD_NOT_SUPPORTED);
159 0 : goto error;
160 : }
161 :
162 : /* Check to see if another thread set key->pkey first */
163 1139 : CRYPTO_w_lock(CRYPTO_LOCK_EVP_PKEY);
164 1139 : if (key->pkey) {
165 0 : CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY);
166 0 : EVP_PKEY_free(ret);
167 0 : ret = key->pkey;
168 : } else {
169 1139 : key->pkey = ret;
170 1139 : CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY);
171 : }
172 1139 : CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_EVP_PKEY);
173 :
174 1139 : return ret;
175 :
176 : error:
177 0 : if (ret != NULL)
178 0 : EVP_PKEY_free(ret);
179 : return (NULL);
180 : }
181 :
182 : /*
183 : * Now two pseudo ASN1 routines that take an EVP_PKEY structure and encode or
184 : * decode as X509_PUBKEY
185 : */
186 :
187 0 : EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp, long length)
188 : {
189 : X509_PUBKEY *xpk;
190 : EVP_PKEY *pktmp;
191 : xpk = d2i_X509_PUBKEY(NULL, pp, length);
192 0 : if (!xpk)
193 : return NULL;
194 0 : pktmp = X509_PUBKEY_get(xpk);
195 : X509_PUBKEY_free(xpk);
196 0 : if (!pktmp)
197 : return NULL;
198 0 : if (a) {
199 0 : EVP_PKEY_free(*a);
200 0 : *a = pktmp;
201 : }
202 0 : return pktmp;
203 : }
204 :
205 0 : int i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp)
206 : {
207 0 : X509_PUBKEY *xpk = NULL;
208 : int ret;
209 0 : if (!a)
210 : return 0;
211 0 : if (!X509_PUBKEY_set(&xpk, a))
212 : return 0;
213 0 : ret = i2d_X509_PUBKEY(xpk, pp);
214 0 : X509_PUBKEY_free(xpk);
215 0 : return ret;
216 : }
217 :
218 : /*
219 : * The following are equivalents but which return RSA and DSA keys
220 : */
221 : #ifndef OPENSSL_NO_RSA
222 0 : RSA *d2i_RSA_PUBKEY(RSA **a, const unsigned char **pp, long length)
223 : {
224 : EVP_PKEY *pkey;
225 : RSA *key;
226 : const unsigned char *q;
227 0 : q = *pp;
228 0 : pkey = d2i_PUBKEY(NULL, &q, length);
229 0 : if (!pkey)
230 : return NULL;
231 0 : key = EVP_PKEY_get1_RSA(pkey);
232 0 : EVP_PKEY_free(pkey);
233 0 : if (!key)
234 : return NULL;
235 0 : *pp = q;
236 0 : if (a) {
237 0 : RSA_free(*a);
238 0 : *a = key;
239 : }
240 0 : return key;
241 : }
242 :
243 0 : int i2d_RSA_PUBKEY(RSA *a, unsigned char **pp)
244 : {
245 : EVP_PKEY *pktmp;
246 : int ret;
247 0 : if (!a)
248 : return 0;
249 0 : pktmp = EVP_PKEY_new();
250 0 : if (!pktmp) {
251 0 : ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE);
252 0 : return 0;
253 : }
254 0 : EVP_PKEY_set1_RSA(pktmp, a);
255 0 : ret = i2d_PUBKEY(pktmp, pp);
256 0 : EVP_PKEY_free(pktmp);
257 0 : return ret;
258 : }
259 : #endif
260 :
261 : #ifndef OPENSSL_NO_DSA
262 0 : DSA *d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp, long length)
263 : {
264 : EVP_PKEY *pkey;
265 : DSA *key;
266 : const unsigned char *q;
267 0 : q = *pp;
268 0 : pkey = d2i_PUBKEY(NULL, &q, length);
269 0 : if (!pkey)
270 : return NULL;
271 0 : key = EVP_PKEY_get1_DSA(pkey);
272 0 : EVP_PKEY_free(pkey);
273 0 : if (!key)
274 : return NULL;
275 0 : *pp = q;
276 0 : if (a) {
277 0 : DSA_free(*a);
278 0 : *a = key;
279 : }
280 0 : return key;
281 : }
282 :
283 0 : int i2d_DSA_PUBKEY(DSA *a, unsigned char **pp)
284 : {
285 : EVP_PKEY *pktmp;
286 : int ret;
287 0 : if (!a)
288 : return 0;
289 0 : pktmp = EVP_PKEY_new();
290 0 : if (!pktmp) {
291 0 : ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE);
292 0 : return 0;
293 : }
294 0 : EVP_PKEY_set1_DSA(pktmp, a);
295 0 : ret = i2d_PUBKEY(pktmp, pp);
296 0 : EVP_PKEY_free(pktmp);
297 0 : return ret;
298 : }
299 : #endif
300 :
301 : #ifndef OPENSSL_NO_EC
302 0 : EC_KEY *d2i_EC_PUBKEY(EC_KEY **a, const unsigned char **pp, long length)
303 : {
304 : EVP_PKEY *pkey;
305 : EC_KEY *key;
306 : const unsigned char *q;
307 0 : q = *pp;
308 0 : pkey = d2i_PUBKEY(NULL, &q, length);
309 0 : if (!pkey)
310 : return (NULL);
311 0 : key = EVP_PKEY_get1_EC_KEY(pkey);
312 0 : EVP_PKEY_free(pkey);
313 0 : if (!key)
314 : return (NULL);
315 0 : *pp = q;
316 0 : if (a) {
317 0 : EC_KEY_free(*a);
318 0 : *a = key;
319 : }
320 0 : return (key);
321 : }
322 :
323 0 : int i2d_EC_PUBKEY(EC_KEY *a, unsigned char **pp)
324 : {
325 : EVP_PKEY *pktmp;
326 : int ret;
327 0 : if (!a)
328 : return (0);
329 0 : if ((pktmp = EVP_PKEY_new()) == NULL) {
330 0 : ASN1err(ASN1_F_I2D_EC_PUBKEY, ERR_R_MALLOC_FAILURE);
331 0 : return (0);
332 : }
333 0 : EVP_PKEY_set1_EC_KEY(pktmp, a);
334 0 : ret = i2d_PUBKEY(pktmp, pp);
335 0 : EVP_PKEY_free(pktmp);
336 0 : return (ret);
337 : }
338 : #endif
339 :
340 0 : int X509_PUBKEY_set0_param(X509_PUBKEY *pub, ASN1_OBJECT *aobj,
341 : int ptype, void *pval,
342 : unsigned char *penc, int penclen)
343 : {
344 0 : if (!X509_ALGOR_set0(pub->algor, aobj, ptype, pval))
345 : return 0;
346 0 : if (penc) {
347 0 : if (pub->public_key->data)
348 0 : OPENSSL_free(pub->public_key->data);
349 0 : pub->public_key->data = penc;
350 0 : pub->public_key->length = penclen;
351 : /* Set number of unused bits to zero */
352 0 : pub->public_key->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
353 0 : pub->public_key->flags |= ASN1_STRING_FLAG_BITS_LEFT;
354 : }
355 : return 1;
356 : }
357 :
358 1139 : int X509_PUBKEY_get0_param(ASN1_OBJECT **ppkalg,
359 : const unsigned char **pk, int *ppklen,
360 : X509_ALGOR **pa, X509_PUBKEY *pub)
361 : {
362 1139 : if (ppkalg)
363 0 : *ppkalg = pub->algor->algorithm;
364 1139 : if (pk) {
365 1139 : *pk = pub->public_key->data;
366 1139 : *ppklen = pub->public_key->length;
367 : }
368 1139 : if (pa)
369 0 : *pa = pub->algor;
370 1139 : return 1;
371 : }
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