1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2 * All rights reserved.
3 *
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
7 *
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
14 *
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 *
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.] */
56
57 #include <openssl/asn1.h>
58 #include <openssl/asn1t.h>
59 #include <openssl/err.h>
60 #include <openssl/evp.h>
61 #include <openssl/mem.h>
62 #include <openssl/obj.h>
63 #include <openssl/x509.h>
64
65 #include "../evp/internal.h"
66
67
68 /* Minor tweak to operation: free up EVP_PKEY */
pubkey_cb(int operation,ASN1_VALUE ** pval,const ASN1_ITEM * it,void * exarg)69 static int pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
70 void *exarg)
71 {
72 if (operation == ASN1_OP_FREE_POST)
73 {
74 X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval;
75 EVP_PKEY_free(pubkey->pkey);
76 }
77 return 1;
78 }
79
80 ASN1_SEQUENCE_cb(X509_PUBKEY, pubkey_cb) = {
81 ASN1_SIMPLE(X509_PUBKEY, algor, X509_ALGOR),
82 ASN1_SIMPLE(X509_PUBKEY, public_key, ASN1_BIT_STRING)
83 } ASN1_SEQUENCE_END_cb(X509_PUBKEY, X509_PUBKEY)
84
85 IMPLEMENT_ASN1_FUNCTIONS(X509_PUBKEY)
86
87 int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey)
88 {
89 X509_PUBKEY *pk=NULL;
90
91 if (x == NULL) return(0);
92
93 if ((pk=X509_PUBKEY_new()) == NULL) goto error;
94
95 if (pkey->ameth)
96 {
97 if (pkey->ameth->pub_encode)
98 {
99 if (!pkey->ameth->pub_encode(pk, pkey))
100 {
101 OPENSSL_PUT_ERROR(X509, X509_PUBKEY_set, X509_R_PUBLIC_KEY_ENCODE_ERROR);
102 goto error;
103 }
104 }
105 else
106 {
107 OPENSSL_PUT_ERROR(X509, X509_PUBKEY_set, X509_R_METHOD_NOT_SUPPORTED);
108 goto error;
109 }
110 }
111 else
112 {
113 OPENSSL_PUT_ERROR(X509, X509_PUBKEY_set, X509_R_UNSUPPORTED_ALGORITHM);
114 goto error;
115 }
116
117 if (*x != NULL)
118 X509_PUBKEY_free(*x);
119
120 *x=pk;
121
122 return 1;
123 error:
124 if (pk != NULL) X509_PUBKEY_free(pk);
125 return 0;
126 }
127
X509_PUBKEY_get(X509_PUBKEY * key)128 EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key)
129 {
130 EVP_PKEY *ret=NULL;
131
132 if (key == NULL) goto error;
133
134 if (key->pkey != NULL)
135 {
136 return EVP_PKEY_dup(key->pkey);
137 }
138
139 if (key->public_key == NULL) goto error;
140
141 if ((ret = EVP_PKEY_new()) == NULL)
142 {
143 OPENSSL_PUT_ERROR(X509, X509_PUBKEY_get, ERR_R_MALLOC_FAILURE);
144 goto error;
145 }
146
147 if (!EVP_PKEY_set_type(ret, OBJ_obj2nid(key->algor->algorithm)))
148 {
149 OPENSSL_PUT_ERROR(X509, X509_PUBKEY_get, X509_R_UNSUPPORTED_ALGORITHM);
150 goto error;
151 }
152
153 if (ret->ameth->pub_decode)
154 {
155 if (!ret->ameth->pub_decode(ret, key))
156 {
157 OPENSSL_PUT_ERROR(X509, X509_PUBKEY_get, X509_R_PUBLIC_KEY_DECODE_ERROR);
158 goto error;
159 }
160 }
161 else
162 {
163 OPENSSL_PUT_ERROR(X509, X509_PUBKEY_get, X509_R_METHOD_NOT_SUPPORTED);
164 goto error;
165 }
166
167 /* Check to see if another thread set key->pkey first */
168 CRYPTO_w_lock(CRYPTO_LOCK_EVP_PKEY);
169 if (key->pkey)
170 {
171 CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY);
172 EVP_PKEY_free(ret);
173 ret = key->pkey;
174 }
175 else
176 {
177 key->pkey = ret;
178 CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY);
179 }
180
181 return EVP_PKEY_dup(ret);
182
183 error:
184 if (ret != NULL)
185 EVP_PKEY_free(ret);
186 return(NULL);
187 }
188
189 /* Now two pseudo ASN1 routines that take an EVP_PKEY structure
190 * and encode or decode as X509_PUBKEY
191 */
192
d2i_PUBKEY(EVP_PKEY ** a,const unsigned char ** pp,long length)193 EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp,
194 long length)
195 {
196 X509_PUBKEY *xpk;
197 EVP_PKEY *pktmp;
198 xpk = d2i_X509_PUBKEY(NULL, pp, length);
199 if(!xpk) return NULL;
200 pktmp = X509_PUBKEY_get(xpk);
201 X509_PUBKEY_free(xpk);
202 if(!pktmp) return NULL;
203 if(a)
204 {
205 EVP_PKEY_free(*a);
206 *a = pktmp;
207 }
208 return pktmp;
209 }
210
i2d_PUBKEY(const EVP_PKEY * a,unsigned char ** pp)211 int i2d_PUBKEY(const EVP_PKEY *a, unsigned char **pp)
212 {
213 X509_PUBKEY *xpk=NULL;
214 int ret;
215 if(!a) return 0;
216 if(!X509_PUBKEY_set(&xpk, (EVP_PKEY*) a)) return 0;
217 ret = i2d_X509_PUBKEY(xpk, pp);
218 X509_PUBKEY_free(xpk);
219 return ret;
220 }
221
222 /* The following are equivalents but which return RSA and DSA
223 * keys
224 */
d2i_RSA_PUBKEY(RSA ** a,const unsigned char ** pp,long length)225 RSA *d2i_RSA_PUBKEY(RSA **a, const unsigned char **pp,
226 long length)
227 {
228 EVP_PKEY *pkey;
229 RSA *key;
230 const unsigned char *q;
231 q = *pp;
232 pkey = d2i_PUBKEY(NULL, &q, length);
233 if (!pkey) return NULL;
234 key = EVP_PKEY_get1_RSA(pkey);
235 EVP_PKEY_free(pkey);
236 if (!key) return NULL;
237 *pp = q;
238 if (a)
239 {
240 RSA_free(*a);
241 *a = key;
242 }
243 return key;
244 }
245
i2d_RSA_PUBKEY(const RSA * a,unsigned char ** pp)246 int i2d_RSA_PUBKEY(const RSA *a, unsigned char **pp)
247 {
248 EVP_PKEY *pktmp;
249 int ret;
250 if (!a) return 0;
251 pktmp = EVP_PKEY_new();
252 if (!pktmp)
253 {
254 OPENSSL_PUT_ERROR(X509, i2d_RSA_PUBKEY, ERR_R_MALLOC_FAILURE);
255 return 0;
256 }
257 EVP_PKEY_set1_RSA(pktmp, (RSA*) a);
258 ret = i2d_PUBKEY(pktmp, pp);
259 EVP_PKEY_free(pktmp);
260 return ret;
261 }
262
263 #ifndef OPENSSL_NO_DSA
d2i_DSA_PUBKEY(DSA ** a,const unsigned char ** pp,long length)264 DSA *d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp,
265 long length)
266 {
267 EVP_PKEY *pkey;
268 DSA *key;
269 const unsigned char *q;
270 q = *pp;
271 pkey = d2i_PUBKEY(NULL, &q, length);
272 if (!pkey) return NULL;
273 key = EVP_PKEY_get1_DSA(pkey);
274 EVP_PKEY_free(pkey);
275 if (!key) return NULL;
276 *pp = q;
277 if (a)
278 {
279 DSA_free(*a);
280 *a = key;
281 }
282 return key;
283 }
284
i2d_DSA_PUBKEY(const DSA * a,unsigned char ** pp)285 int i2d_DSA_PUBKEY(const DSA *a, unsigned char **pp)
286 {
287 EVP_PKEY *pktmp;
288 int ret;
289 if(!a) return 0;
290 pktmp = EVP_PKEY_new();
291 if(!pktmp)
292 {
293 OPENSSL_PUT_ERROR(X509, i2d_DSA_PUBKEY, ERR_R_MALLOC_FAILURE);
294 return 0;
295 }
296 EVP_PKEY_set1_DSA(pktmp, (DSA*) a);
297 ret = i2d_PUBKEY(pktmp, pp);
298 EVP_PKEY_free(pktmp);
299 return ret;
300 }
301 #endif
302
d2i_EC_PUBKEY(EC_KEY ** a,const unsigned char ** pp,long length)303 EC_KEY *d2i_EC_PUBKEY(EC_KEY **a, const unsigned char **pp, long length)
304 {
305 EVP_PKEY *pkey;
306 EC_KEY *key;
307 const unsigned char *q;
308 q = *pp;
309 pkey = d2i_PUBKEY(NULL, &q, length);
310 if (!pkey) return(NULL);
311 key = EVP_PKEY_get1_EC_KEY(pkey);
312 EVP_PKEY_free(pkey);
313 if (!key) return(NULL);
314 *pp = q;
315 if (a)
316 {
317 EC_KEY_free(*a);
318 *a = key;
319 }
320 return(key);
321 }
322
i2d_EC_PUBKEY(const EC_KEY * a,unsigned char ** pp)323 int i2d_EC_PUBKEY(const EC_KEY *a, unsigned char **pp)
324 {
325 EVP_PKEY *pktmp;
326 int ret;
327 if (!a) return(0);
328 if ((pktmp = EVP_PKEY_new()) == NULL)
329 {
330 OPENSSL_PUT_ERROR(X509, i2d_EC_PUBKEY, ERR_R_MALLOC_FAILURE);
331 return(0);
332 }
333 EVP_PKEY_set1_EC_KEY(pktmp, (EC_KEY*) a);
334 ret = i2d_PUBKEY(pktmp, pp);
335 EVP_PKEY_free(pktmp);
336 return(ret);
337 }
338
X509_PUBKEY_set0_param(X509_PUBKEY * pub,const ASN1_OBJECT * aobj,int ptype,void * pval,unsigned char * penc,int penclen)339 int X509_PUBKEY_set0_param(X509_PUBKEY *pub, const 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