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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 */
65static 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
74ASN1_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
79IMPLEMENT_ASN1_FUNCTIONS(X509_PUBKEY)
80
81int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey)
82 {
83 int ok=0;
84 X509_PUBKEY *pk;
85 X509_ALGOR *a;
86 ASN1_OBJECT *o;
87 unsigned char *s,*p = NULL;
88 int i;
89
90 if (x == NULL) return(0);
91
92 if ((pk=X509_PUBKEY_new()) == NULL) goto err;
93 a=pk->algor;
94
95 /* set the algorithm id */
96 if ((o=OBJ_nid2obj(pkey->type)) == NULL) goto err;
97 ASN1_OBJECT_free(a->algorithm);
98 a->algorithm=o;
99
100 /* Set the parameter list */
101 if (!pkey->save_parameters || (pkey->type == EVP_PKEY_RSA))
102 {
103 if ((a->parameter == NULL) ||
104 (a->parameter->type != V_ASN1_NULL))
105 {
106 ASN1_TYPE_free(a->parameter);
107 a->parameter=ASN1_TYPE_new();
108 a->parameter->type=V_ASN1_NULL;
109 }
110 }
111 else
112#ifndef OPENSSL_NO_DSA
113 if (pkey->type == EVP_PKEY_DSA)
114 {
115 unsigned char *pp;
116 DSA *dsa;
117
118 dsa=pkey->pkey.dsa;
119 dsa->write_params=0;
120 ASN1_TYPE_free(a->parameter);
121 i=i2d_DSAparams(dsa,NULL);
122 if ((p=(unsigned char *)OPENSSL_malloc(i)) == NULL) goto err;
123 pp=p;
124 i2d_DSAparams(dsa,&pp);
125 a->parameter=ASN1_TYPE_new();
126 a->parameter->type=V_ASN1_SEQUENCE;
127 a->parameter->value.sequence=ASN1_STRING_new();
128 ASN1_STRING_set(a->parameter->value.sequence,p,i);
129 OPENSSL_free(p);
130 }
131 else
132#endif
133 {
134 X509err(X509_F_X509_PUBKEY_SET,X509_R_UNSUPPORTED_ALGORITHM);
135 goto err;
136 }
137
138 if ((i=i2d_PublicKey(pkey,NULL)) <= 0) goto err;
139 if ((s=(unsigned char *)OPENSSL_malloc(i+1)) == NULL)
140 {
141 X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
142 goto err;
143 }
144 p=s;
145 i2d_PublicKey(pkey,&p);
146 if (!M_ASN1_BIT_STRING_set(pk->public_key,s,i)) goto err;
147 /* Set number of unused bits to zero */
148 pk->public_key->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
149 pk->public_key->flags|=ASN1_STRING_FLAG_BITS_LEFT;
150
151 OPENSSL_free(s);
152
153#if 0
154 CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
155 pk->pkey=pkey;
156#endif
157
158 if (*x != NULL)
159 X509_PUBKEY_free(*x);
160
161 *x=pk;
162 pk=NULL;
163
164 ok=1;
165err:
166 if (pk != NULL) X509_PUBKEY_free(pk);
167 return(ok);
168 }
169
170EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key)
171 {
172 EVP_PKEY *ret=NULL;
173 long j;
174 int type;
175 unsigned char *p;
176#ifndef OPENSSL_NO_DSA
177 const unsigned char *cp;
178 X509_ALGOR *a;
179#endif
180
181 if (key == NULL) goto err;
182
183 if (key->pkey != NULL)
184 {
185 CRYPTO_add(&key->pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
186 return(key->pkey);
187 }
188
189 if (key->public_key == NULL) goto err;
190
191 type=OBJ_obj2nid(key->algor->algorithm);
192 p=key->public_key->data;
193 j=key->public_key->length;
194 if ((ret=d2i_PublicKey(type,NULL,&p,(long)j)) == NULL)
195 {
196 X509err(X509_F_X509_PUBKEY_GET,X509_R_ERR_ASN1_LIB);
197 goto err;
198 }
199 ret->save_parameters=0;
200
201#ifndef OPENSSL_NO_DSA
202 a=key->algor;
203 if (ret->type == EVP_PKEY_DSA)
204 {
205 if (a->parameter && (a->parameter->type == V_ASN1_SEQUENCE))
206 {
207 ret->pkey.dsa->write_params=0;
208 cp=p=a->parameter->value.sequence->data;
209 j=a->parameter->value.sequence->length;
210 if (!d2i_DSAparams(&ret->pkey.dsa,&cp,(long)j))
211 goto err;
212 }
213 ret->save_parameters=1;
214 }
215#endif
216 key->pkey=ret;
217 CRYPTO_add(&ret->references,1,CRYPTO_LOCK_EVP_PKEY);
218 return(ret);
219err:
220 if (ret != NULL)
221 EVP_PKEY_free(ret);
222 return(NULL);
223 }
224
225/* Now two pseudo ASN1 routines that take an EVP_PKEY structure
226 * and encode or decode as X509_PUBKEY
227 */
228
229EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, unsigned char **pp,
230 long length)
231{
232 X509_PUBKEY *xpk;
233 EVP_PKEY *pktmp;
234 xpk = d2i_X509_PUBKEY(NULL, pp, length);
235 if(!xpk) return NULL;
236 pktmp = X509_PUBKEY_get(xpk);
237 X509_PUBKEY_free(xpk);
238 if(!pktmp) return NULL;
239 if(a) {
240 EVP_PKEY_free(*a);
241 *a = pktmp;
242 }
243 return pktmp;
244}
245
246int i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp)
247{
248 X509_PUBKEY *xpk=NULL;
249 int ret;
250 if(!a) return 0;
251 if(!X509_PUBKEY_set(&xpk, a)) return 0;
252 ret = i2d_X509_PUBKEY(xpk, pp);
253 X509_PUBKEY_free(xpk);
254 return ret;
255}
256
257/* The following are equivalents but which return RSA and DSA
258 * keys
259 */
260#ifndef OPENSSL_NO_RSA
261RSA *d2i_RSA_PUBKEY(RSA **a, unsigned char **pp,
262 long length)
263{
264 EVP_PKEY *pkey;
265 RSA *key;
266 unsigned char *q;
267 q = *pp;
268 pkey = d2i_PUBKEY(NULL, &q, length);
269 if(!pkey) return NULL;
270 key = EVP_PKEY_get1_RSA(pkey);
271 EVP_PKEY_free(pkey);
272 if(!key) return NULL;
273 *pp = q;
274 if(a) {
275 RSA_free(*a);
276 *a = key;
277 }
278 return key;
279}
280
281int i2d_RSA_PUBKEY(RSA *a, unsigned char **pp)
282{
283 EVP_PKEY *pktmp;
284 int ret;
285 if(!a) return 0;
286 pktmp = EVP_PKEY_new();
287 if(!pktmp) {
288 ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE);
289 return 0;
290 }
291 EVP_PKEY_set1_RSA(pktmp, a);
292 ret = i2d_PUBKEY(pktmp, pp);
293 EVP_PKEY_free(pktmp);
294 return ret;
295}
296#endif
297
298#ifndef OPENSSL_NO_DSA
299DSA *d2i_DSA_PUBKEY(DSA **a, unsigned char **pp,
300 long length)
301{
302 EVP_PKEY *pkey;
303 DSA *key;
304 unsigned char *q;
305 q = *pp;
306 pkey = d2i_PUBKEY(NULL, &q, length);
307 if(!pkey) return NULL;
308 key = EVP_PKEY_get1_DSA(pkey);
309 EVP_PKEY_free(pkey);
310 if(!key) return NULL;
311 *pp = q;
312 if(a) {
313 DSA_free(*a);
314 *a = key;
315 }
316 return key;
317}
318
319int i2d_DSA_PUBKEY(DSA *a, unsigned char **pp)
320{
321 EVP_PKEY *pktmp;
322 int ret;
323 if(!a) return 0;
324 pktmp = EVP_PKEY_new();
325 if(!pktmp) {
326 ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE);
327 return 0;
328 }
329 EVP_PKEY_set1_DSA(pktmp, a);
330 ret = i2d_PUBKEY(pktmp, pp);
331 EVP_PKEY_free(pktmp);
332 return ret;
333}
334#endif