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
64 /* Minor tweak to operation: free up EVP_PKEY */
pubkey_cb(int operation,ASN1_VALUE ** pval,const ASN1_ITEM * it)65 static int pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it)
66 {
67 if(operation == ASN1_OP_FREE_POST) {
68 X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval;
69 EVP_PKEY_free(pubkey->pkey);
70 }
71 return 1;
72 }
73
74 ASN1_SEQUENCE_cb(X509_PUBKEY, pubkey_cb) = {
75 ASN1_SIMPLE(X509_PUBKEY, algor, X509_ALGOR),
76 ASN1_SIMPLE(X509_PUBKEY, public_key, ASN1_BIT_STRING)
77 } ASN1_SEQUENCE_END_cb(X509_PUBKEY, X509_PUBKEY)
78
79 IMPLEMENT_ASN1_FUNCTIONS(X509_PUBKEY)
80
81 int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey)
82 {
83 X509_PUBKEY *pk=NULL;
84 X509_ALGOR *a;
85 ASN1_OBJECT *o;
86 unsigned char *s,*p = NULL;
87 int i;
88
89 if (x == NULL) return(0);
90
91 if ((pk=X509_PUBKEY_new()) == NULL) goto err;
92 a=pk->algor;
93
94 /* set the algorithm id */
95 if ((o=OBJ_nid2obj(pkey->type)) == NULL) goto err;
96 ASN1_OBJECT_free(a->algorithm);
97 a->algorithm=o;
98
99 /* Set the parameter list */
100 if (!pkey->save_parameters || (pkey->type == EVP_PKEY_RSA))
101 {
102 if ((a->parameter == NULL) ||
103 (a->parameter->type != V_ASN1_NULL))
104 {
105 ASN1_TYPE_free(a->parameter);
106 if (!(a->parameter=ASN1_TYPE_new()))
107 {
108 X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
109 goto err;
110 }
111 a->parameter->type=V_ASN1_NULL;
112 }
113 }
114 else
115 #ifndef OPENSSL_NO_DSA
116 if (pkey->type == EVP_PKEY_DSA)
117 {
118 unsigned char *pp;
119 DSA *dsa;
120
121 dsa=pkey->pkey.dsa;
122 dsa->write_params=0;
123 ASN1_TYPE_free(a->parameter);
124 if ((i=i2d_DSAparams(dsa,NULL)) <= 0)
125 goto err;
126 if (!(p=(unsigned char *)OPENSSL_malloc(i)))
127 {
128 X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
129 goto err;
130 }
131 pp=p;
132 i2d_DSAparams(dsa,&pp);
133 if (!(a->parameter=ASN1_TYPE_new()))
134 {
135 OPENSSL_free(p);
136 X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
137 goto err;
138 }
139 a->parameter->type=V_ASN1_SEQUENCE;
140 if (!(a->parameter->value.sequence=ASN1_STRING_new()))
141 {
142 OPENSSL_free(p);
143 X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
144 goto err;
145 }
146 if (!ASN1_STRING_set(a->parameter->value.sequence,p,i))
147 {
148 OPENSSL_free(p);
149 X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
150 goto err;
151 }
152 OPENSSL_free(p);
153 }
154 else
155 #endif
156 {
157 X509err(X509_F_X509_PUBKEY_SET,X509_R_UNSUPPORTED_ALGORITHM);
158 goto err;
159 }
160
161 if ((i=i2d_PublicKey(pkey,NULL)) <= 0) goto err;
162 if ((s=(unsigned char *)OPENSSL_malloc(i+1)) == NULL)
163 {
164 X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
165 goto err;
166 }
167 p=s;
168 i2d_PublicKey(pkey,&p);
169 if (!M_ASN1_BIT_STRING_set(pk->public_key,s,i))
170 {
171 X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
172 goto err;
173 }
174 /* Set number of unused bits to zero */
175 pk->public_key->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
176 pk->public_key->flags|=ASN1_STRING_FLAG_BITS_LEFT;
177
178 OPENSSL_free(s);
179
180 #if 0
181 CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
182 pk->pkey=pkey;
183 #endif
184
185 if (*x != NULL)
186 X509_PUBKEY_free(*x);
187
188 *x=pk;
189
190 return 1;
191 err:
192 if (pk != NULL) X509_PUBKEY_free(pk);
193 return 0;
194 }
195
X509_PUBKEY_get(X509_PUBKEY * key)196 EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key)
197 {
198 EVP_PKEY *ret=NULL;
199 long j;
200 int type;
201 unsigned char *p;
202 #ifndef OPENSSL_NO_DSA
203 const unsigned char *cp;
204 X509_ALGOR *a;
205 #endif
206
207 if (key == NULL) goto err;
208
209 if (key->pkey != NULL)
210 {
211 CRYPTO_add(&key->pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
212 return(key->pkey);
213 }
214
215 if (key->public_key == NULL) goto err;
216
217 type=OBJ_obj2nid(key->algor->algorithm);
218 p=key->public_key->data;
219 j=key->public_key->length;
220 if ((ret=d2i_PublicKey(type,NULL,&p,(long)j)) == NULL)
221 {
222 X509err(X509_F_X509_PUBKEY_GET,X509_R_ERR_ASN1_LIB);
223 goto err;
224 }
225 ret->save_parameters=0;
226
227 #ifndef OPENSSL_NO_DSA
228 a=key->algor;
229 if (ret->type == EVP_PKEY_DSA)
230 {
231 if (a->parameter && (a->parameter->type == V_ASN1_SEQUENCE))
232 {
233 ret->pkey.dsa->write_params=0;
234 cp=p=a->parameter->value.sequence->data;
235 j=a->parameter->value.sequence->length;
236 if (!d2i_DSAparams(&ret->pkey.dsa,&cp,(long)j))
237 goto err;
238 }
239 ret->save_parameters=1;
240 }
241 #endif
242 key->pkey=ret;
243 CRYPTO_add(&ret->references,1,CRYPTO_LOCK_EVP_PKEY);
244 return(ret);
245 err:
246 if (ret != NULL)
247 EVP_PKEY_free(ret);
248 return(NULL);
249 }
250
251 /* Now two pseudo ASN1 routines that take an EVP_PKEY structure
252 * and encode or decode as X509_PUBKEY
253 */
254
d2i_PUBKEY(EVP_PKEY ** a,unsigned char ** pp,long length)255 EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, unsigned char **pp,
256 long length)
257 {
258 X509_PUBKEY *xpk;
259 EVP_PKEY *pktmp;
260 xpk = d2i_X509_PUBKEY(NULL, pp, length);
261 if(!xpk) return NULL;
262 pktmp = X509_PUBKEY_get(xpk);
263 X509_PUBKEY_free(xpk);
264 if(!pktmp) return NULL;
265 if(a) {
266 EVP_PKEY_free(*a);
267 *a = pktmp;
268 }
269 return pktmp;
270 }
271
i2d_PUBKEY(EVP_PKEY * a,unsigned char ** pp)272 int i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp)
273 {
274 X509_PUBKEY *xpk=NULL;
275 int ret;
276 if(!a) return 0;
277 if(!X509_PUBKEY_set(&xpk, a)) return 0;
278 ret = i2d_X509_PUBKEY(xpk, pp);
279 X509_PUBKEY_free(xpk);
280 return ret;
281 }
282
283 /* The following are equivalents but which return RSA and DSA
284 * keys
285 */
286 #ifndef OPENSSL_NO_RSA
d2i_RSA_PUBKEY(RSA ** a,unsigned char ** pp,long length)287 RSA *d2i_RSA_PUBKEY(RSA **a, unsigned char **pp,
288 long length)
289 {
290 EVP_PKEY *pkey;
291 RSA *key;
292 unsigned char *q;
293 q = *pp;
294 pkey = d2i_PUBKEY(NULL, &q, length);
295 if(!pkey) return NULL;
296 key = EVP_PKEY_get1_RSA(pkey);
297 EVP_PKEY_free(pkey);
298 if(!key) return NULL;
299 *pp = q;
300 if(a) {
301 RSA_free(*a);
302 *a = key;
303 }
304 return key;
305 }
306
i2d_RSA_PUBKEY(RSA * a,unsigned char ** pp)307 int i2d_RSA_PUBKEY(RSA *a, unsigned char **pp)
308 {
309 EVP_PKEY *pktmp;
310 int ret;
311 if(!a) return 0;
312 pktmp = EVP_PKEY_new();
313 if(!pktmp) {
314 ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE);
315 return 0;
316 }
317 EVP_PKEY_set1_RSA(pktmp, a);
318 ret = i2d_PUBKEY(pktmp, pp);
319 EVP_PKEY_free(pktmp);
320 return ret;
321 }
322 #endif
323
324 #ifndef OPENSSL_NO_DSA
d2i_DSA_PUBKEY(DSA ** a,unsigned char ** pp,long length)325 DSA *d2i_DSA_PUBKEY(DSA **a, unsigned char **pp,
326 long length)
327 {
328 EVP_PKEY *pkey;
329 DSA *key;
330 unsigned char *q;
331 q = *pp;
332 pkey = d2i_PUBKEY(NULL, &q, length);
333 if(!pkey) return NULL;
334 key = EVP_PKEY_get1_DSA(pkey);
335 EVP_PKEY_free(pkey);
336 if(!key) return NULL;
337 *pp = q;
338 if(a) {
339 DSA_free(*a);
340 *a = key;
341 }
342 return key;
343 }
344
i2d_DSA_PUBKEY(DSA * a,unsigned char ** pp)345 int i2d_DSA_PUBKEY(DSA *a, unsigned char **pp)
346 {
347 EVP_PKEY *pktmp;
348 int ret;
349 if(!a) return 0;
350 pktmp = EVP_PKEY_new();
351 if(!pktmp) {
352 ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE);
353 return 0;
354 }
355 EVP_PKEY_set1_DSA(pktmp, a);
356 ret = i2d_PUBKEY(pktmp, pp);
357 EVP_PKEY_free(pktmp);
358 return ret;
359 }
360 #endif
361