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 */
pubkey_cb(int operation,ASN1_VALUE ** pval,const ASN1_ITEM * it,void * exarg)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
X509_PUBKEY_get(X509_PUBKEY * key)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 key->pkey = ret;
175 CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_EVP_PKEY);
176
177 return ret;
178
179 error:
180 if (ret != NULL)
181 EVP_PKEY_free(ret);
182 return(NULL);
183 }
184
185 /* Now two pseudo ASN1 routines that take an EVP_PKEY structure
186 * and encode or decode as X509_PUBKEY
187 */
188
d2i_PUBKEY(EVP_PKEY ** a,const unsigned char ** pp,long length)189 EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp,
190 long length)
191 {
192 X509_PUBKEY *xpk;
193 EVP_PKEY *pktmp;
194 xpk = d2i_X509_PUBKEY(NULL, pp, length);
195 if(!xpk) return NULL;
196 pktmp = X509_PUBKEY_get(xpk);
197 X509_PUBKEY_free(xpk);
198 if(!pktmp) return NULL;
199 if(a)
200 {
201 EVP_PKEY_free(*a);
202 *a = pktmp;
203 }
204 return pktmp;
205 }
206
i2d_PUBKEY(EVP_PKEY * a,unsigned char ** pp)207 int i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp)
208 {
209 X509_PUBKEY *xpk=NULL;
210 int ret;
211 if(!a) return 0;
212 if(!X509_PUBKEY_set(&xpk, a)) return 0;
213 ret = i2d_X509_PUBKEY(xpk, pp);
214 X509_PUBKEY_free(xpk);
215 return ret;
216 }
217
218 /* The following are equivalents but which return RSA and DSA
219 * keys
220 */
221 #ifndef OPENSSL_NO_RSA
d2i_RSA_PUBKEY(RSA ** a,const unsigned char ** pp,long length)222 RSA *d2i_RSA_PUBKEY(RSA **a, const unsigned char **pp,
223 long length)
224 {
225 EVP_PKEY *pkey;
226 RSA *key;
227 const unsigned char *q;
228 q = *pp;
229 pkey = d2i_PUBKEY(NULL, &q, length);
230 if (!pkey) return NULL;
231 key = EVP_PKEY_get1_RSA(pkey);
232 EVP_PKEY_free(pkey);
233 if (!key) return NULL;
234 *pp = q;
235 if (a)
236 {
237 RSA_free(*a);
238 *a = key;
239 }
240 return key;
241 }
242
i2d_RSA_PUBKEY(RSA * a,unsigned char ** pp)243 int i2d_RSA_PUBKEY(RSA *a, unsigned char **pp)
244 {
245 EVP_PKEY *pktmp;
246 int ret;
247 if (!a) return 0;
248 pktmp = EVP_PKEY_new();
249 if (!pktmp)
250 {
251 ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE);
252 return 0;
253 }
254 EVP_PKEY_set1_RSA(pktmp, a);
255 ret = i2d_PUBKEY(pktmp, pp);
256 EVP_PKEY_free(pktmp);
257 return ret;
258 }
259 #endif
260
261 #ifndef OPENSSL_NO_DSA
d2i_DSA_PUBKEY(DSA ** a,const unsigned char ** pp,long length)262 DSA *d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp,
263 long length)
264 {
265 EVP_PKEY *pkey;
266 DSA *key;
267 const unsigned char *q;
268 q = *pp;
269 pkey = d2i_PUBKEY(NULL, &q, length);
270 if (!pkey) return NULL;
271 key = EVP_PKEY_get1_DSA(pkey);
272 EVP_PKEY_free(pkey);
273 if (!key) return NULL;
274 *pp = q;
275 if (a)
276 {
277 DSA_free(*a);
278 *a = key;
279 }
280 return key;
281 }
282
i2d_DSA_PUBKEY(DSA * a,unsigned char ** pp)283 int i2d_DSA_PUBKEY(DSA *a, unsigned char **pp)
284 {
285 EVP_PKEY *pktmp;
286 int ret;
287 if(!a) return 0;
288 pktmp = EVP_PKEY_new();
289 if(!pktmp)
290 {
291 ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE);
292 return 0;
293 }
294 EVP_PKEY_set1_DSA(pktmp, a);
295 ret = i2d_PUBKEY(pktmp, pp);
296 EVP_PKEY_free(pktmp);
297 return ret;
298 }
299 #endif
300
301 #ifndef OPENSSL_NO_EC
d2i_EC_PUBKEY(EC_KEY ** a,const unsigned char ** pp,long length)302 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 q = *pp;
308 pkey = d2i_PUBKEY(NULL, &q, length);
309 if (!pkey) return(NULL);
310 key = EVP_PKEY_get1_EC_KEY(pkey);
311 EVP_PKEY_free(pkey);
312 if (!key) return(NULL);
313 *pp = q;
314 if (a)
315 {
316 EC_KEY_free(*a);
317 *a = key;
318 }
319 return(key);
320 }
321
i2d_EC_PUBKEY(EC_KEY * a,unsigned char ** pp)322 int i2d_EC_PUBKEY(EC_KEY *a, unsigned char **pp)
323 {
324 EVP_PKEY *pktmp;
325 int ret;
326 if (!a) return(0);
327 if ((pktmp = EVP_PKEY_new()) == NULL)
328 {
329 ASN1err(ASN1_F_I2D_EC_PUBKEY, ERR_R_MALLOC_FAILURE);
330 return(0);
331 }
332 EVP_PKEY_set1_EC_KEY(pktmp, a);
333 ret = i2d_PUBKEY(pktmp, pp);
334 EVP_PKEY_free(pktmp);
335 return(ret);
336 }
337 #endif
338
X509_PUBKEY_set0_param(X509_PUBKEY * pub,ASN1_OBJECT * aobj,int ptype,void * pval,unsigned char * penc,int penclen)339 int X509_PUBKEY_set0_param(X509_PUBKEY *pub, ASN1_OBJECT *aobj,
340 int ptype, void *pval,
341 unsigned char *penc, int penclen)
342 {
343 if (!X509_ALGOR_set0(pub->algor, aobj, ptype, pval))
344 return 0;
345 if (penc)
346 {
347 if (pub->public_key->data)
348 OPENSSL_free(pub->public_key->data);
349 pub->public_key->data = penc;
350 pub->public_key->length = penclen;
351 /* Set number of unused bits to zero */
352 pub->public_key->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
353 pub->public_key->flags|=ASN1_STRING_FLAG_BITS_LEFT;
354 }
355 return 1;
356 }
357
X509_PUBKEY_get0_param(ASN1_OBJECT ** ppkalg,const unsigned char ** pk,int * ppklen,X509_ALGOR ** pa,X509_PUBKEY * pub)358 int X509_PUBKEY_get0_param(ASN1_OBJECT **ppkalg,
359 const unsigned char **pk, int *ppklen,
360 X509_ALGOR **pa,
361 X509_PUBKEY *pub)
362 {
363 if (ppkalg)
364 *ppkalg = pub->algor->algorithm;
365 if (pk)
366 {
367 *pk = pub->public_key->data;
368 *ppklen = pub->public_key->length;
369 }
370 if (pa)
371 *pa = pub->algor;
372 return 1;
373 }
374