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d02b48c6 | 1 | /* crypto/asn1/x_pubkey.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
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. | |
0f113f3e | 8 | * |
d02b48c6 RE |
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). | |
0f113f3e | 15 | * |
d02b48c6 RE |
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. | |
0f113f3e | 22 | * |
d02b48c6 RE |
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 :-). | |
0f113f3e | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 40 | * |
d02b48c6 RE |
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. | |
0f113f3e | 52 | * |
d02b48c6 RE |
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> | |
b39fc560 | 60 | #include "internal/cryptlib.h" |
9d6b1ce6 | 61 | #include <openssl/asn1t.h> |
f0e8ae72 | 62 | #include <openssl/x509.h> |
5fe736e5 | 63 | #include "internal/asn1_int.h" |
3eeaab4b | 64 | #ifndef OPENSSL_NO_RSA |
0f113f3e | 65 | # include <openssl/rsa.h> |
3eeaab4b NL |
66 | #endif |
67 | #ifndef OPENSSL_NO_DSA | |
0f113f3e | 68 | # include <openssl/dsa.h> |
3eeaab4b | 69 | #endif |
d02b48c6 | 70 | |
9d6b1ce6 | 71 | /* Minor tweak to operation: free up EVP_PKEY */ |
24484759 | 72 | static int pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, |
0f113f3e MC |
73 | void *exarg) |
74 | { | |
75 | if (operation == ASN1_OP_FREE_POST) { | |
76 | X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval; | |
77 | EVP_PKEY_free(pubkey->pkey); | |
78 | } | |
79 | return 1; | |
80 | } | |
d02b48c6 | 81 | |
9d6b1ce6 | 82 | ASN1_SEQUENCE_cb(X509_PUBKEY, pubkey_cb) = { |
0f113f3e MC |
83 | ASN1_SIMPLE(X509_PUBKEY, algor, X509_ALGOR), |
84 | ASN1_SIMPLE(X509_PUBKEY, public_key, ASN1_BIT_STRING) | |
d339187b | 85 | } ASN1_SEQUENCE_END_cb(X509_PUBKEY, X509_PUBKEY) |
d02b48c6 | 86 | |
9d6b1ce6 | 87 | IMPLEMENT_ASN1_FUNCTIONS(X509_PUBKEY) |
d02b48c6 | 88 | |
6b691a5c | 89 | int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey) |
0f113f3e MC |
90 | { |
91 | X509_PUBKEY *pk = NULL; | |
92 | ||
93 | if (x == NULL) | |
94 | return (0); | |
95 | ||
96 | if ((pk = X509_PUBKEY_new()) == NULL) | |
97 | goto error; | |
98 | ||
99 | if (pkey->ameth) { | |
100 | if (pkey->ameth->pub_encode) { | |
101 | if (!pkey->ameth->pub_encode(pk, pkey)) { | |
102 | X509err(X509_F_X509_PUBKEY_SET, | |
103 | X509_R_PUBLIC_KEY_ENCODE_ERROR); | |
104 | goto error; | |
105 | } | |
106 | } else { | |
107 | X509err(X509_F_X509_PUBKEY_SET, X509_R_METHOD_NOT_SUPPORTED); | |
108 | goto error; | |
109 | } | |
110 | } else { | |
111 | X509err(X509_F_X509_PUBKEY_SET, X509_R_UNSUPPORTED_ALGORITHM); | |
112 | goto error; | |
113 | } | |
114 | ||
222561fe | 115 | X509_PUBKEY_free(*x); |
0f113f3e | 116 | *x = pk; |
0f113f3e | 117 | return 1; |
222561fe | 118 | |
0f113f3e | 119 | error: |
222561fe | 120 | X509_PUBKEY_free(pk); |
0f113f3e MC |
121 | return 0; |
122 | } | |
d02b48c6 | 123 | |
6b691a5c | 124 | EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key) |
0f113f3e MC |
125 | { |
126 | EVP_PKEY *ret = NULL; | |
127 | ||
128 | if (key == NULL) | |
129 | goto error; | |
130 | ||
131 | if (key->pkey != NULL) { | |
132 | CRYPTO_add(&key->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY); | |
133 | return key->pkey; | |
134 | } | |
135 | ||
136 | if (key->public_key == NULL) | |
137 | goto error; | |
138 | ||
139 | if ((ret = EVP_PKEY_new()) == NULL) { | |
140 | X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE); | |
141 | goto error; | |
142 | } | |
143 | ||
144 | if (!EVP_PKEY_set_type(ret, OBJ_obj2nid(key->algor->algorithm))) { | |
145 | X509err(X509_F_X509_PUBKEY_GET, X509_R_UNSUPPORTED_ALGORITHM); | |
146 | goto error; | |
147 | } | |
148 | ||
149 | if (ret->ameth->pub_decode) { | |
150 | if (!ret->ameth->pub_decode(ret, key)) { | |
151 | X509err(X509_F_X509_PUBKEY_GET, X509_R_PUBLIC_KEY_DECODE_ERROR); | |
152 | goto error; | |
153 | } | |
154 | } else { | |
155 | X509err(X509_F_X509_PUBKEY_GET, X509_R_METHOD_NOT_SUPPORTED); | |
156 | goto error; | |
157 | } | |
158 | ||
159 | /* Check to see if another thread set key->pkey first */ | |
160 | CRYPTO_w_lock(CRYPTO_LOCK_EVP_PKEY); | |
161 | if (key->pkey) { | |
162 | CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY); | |
163 | EVP_PKEY_free(ret); | |
164 | ret = key->pkey; | |
165 | } else { | |
166 | key->pkey = ret; | |
167 | CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY); | |
168 | } | |
169 | CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_EVP_PKEY); | |
170 | ||
171 | return ret; | |
172 | ||
173 | error: | |
c5ba2d99 | 174 | EVP_PKEY_free(ret); |
0f113f3e MC |
175 | return (NULL); |
176 | } | |
177 | ||
178 | /* | |
179 | * Now two pseudo ASN1 routines that take an EVP_PKEY structure and encode or | |
180 | * decode as X509_PUBKEY | |
52664f50 DSH |
181 | */ |
182 | ||
0f113f3e MC |
183 | EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp, long length) |
184 | { | |
185 | X509_PUBKEY *xpk; | |
186 | EVP_PKEY *pktmp; | |
a46c9789 KR |
187 | const unsigned char *q; |
188 | q = *pp; | |
189 | xpk = d2i_X509_PUBKEY(NULL, &q, length); | |
0f113f3e MC |
190 | if (!xpk) |
191 | return NULL; | |
192 | pktmp = X509_PUBKEY_get(xpk); | |
193 | X509_PUBKEY_free(xpk); | |
194 | if (!pktmp) | |
195 | return NULL; | |
a46c9789 | 196 | *pp = q; |
0f113f3e MC |
197 | if (a) { |
198 | EVP_PKEY_free(*a); | |
199 | *a = pktmp; | |
200 | } | |
201 | return pktmp; | |
202 | } | |
52664f50 DSH |
203 | |
204 | int i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp) | |
0f113f3e MC |
205 | { |
206 | X509_PUBKEY *xpk = NULL; | |
207 | int ret; | |
208 | if (!a) | |
209 | return 0; | |
210 | if (!X509_PUBKEY_set(&xpk, a)) | |
211 | return 0; | |
212 | ret = i2d_X509_PUBKEY(xpk, pp); | |
213 | X509_PUBKEY_free(xpk); | |
214 | return ret; | |
215 | } | |
216 | ||
217 | /* | |
218 | * The following are equivalents but which return RSA and DSA keys | |
52664f50 | 219 | */ |
cf1b7d96 | 220 | #ifndef OPENSSL_NO_RSA |
0f113f3e MC |
221 | RSA *d2i_RSA_PUBKEY(RSA **a, const unsigned char **pp, long length) |
222 | { | |
223 | EVP_PKEY *pkey; | |
224 | RSA *key; | |
225 | const unsigned char *q; | |
226 | q = *pp; | |
227 | pkey = d2i_PUBKEY(NULL, &q, length); | |
228 | if (!pkey) | |
229 | return NULL; | |
230 | key = EVP_PKEY_get1_RSA(pkey); | |
231 | EVP_PKEY_free(pkey); | |
232 | if (!key) | |
233 | return NULL; | |
234 | *pp = q; | |
235 | if (a) { | |
236 | RSA_free(*a); | |
237 | *a = key; | |
238 | } | |
239 | return key; | |
240 | } | |
52664f50 DSH |
241 | |
242 | int i2d_RSA_PUBKEY(RSA *a, unsigned char **pp) | |
0f113f3e MC |
243 | { |
244 | EVP_PKEY *pktmp; | |
245 | int ret; | |
246 | if (!a) | |
247 | return 0; | |
248 | pktmp = EVP_PKEY_new(); | |
90945fa3 | 249 | if (pktmp == NULL) { |
0f113f3e MC |
250 | ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE); |
251 | return 0; | |
252 | } | |
253 | EVP_PKEY_set1_RSA(pktmp, a); | |
254 | ret = i2d_PUBKEY(pktmp, pp); | |
255 | EVP_PKEY_free(pktmp); | |
256 | return ret; | |
257 | } | |
12aefe78 | 258 | #endif |
52664f50 | 259 | |
cf1b7d96 | 260 | #ifndef OPENSSL_NO_DSA |
0f113f3e MC |
261 | DSA *d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp, long length) |
262 | { | |
263 | EVP_PKEY *pkey; | |
264 | DSA *key; | |
265 | const unsigned char *q; | |
266 | q = *pp; | |
267 | pkey = d2i_PUBKEY(NULL, &q, length); | |
268 | if (!pkey) | |
269 | return NULL; | |
270 | key = EVP_PKEY_get1_DSA(pkey); | |
271 | EVP_PKEY_free(pkey); | |
272 | if (!key) | |
273 | return NULL; | |
274 | *pp = q; | |
275 | if (a) { | |
276 | DSA_free(*a); | |
277 | *a = key; | |
278 | } | |
279 | return key; | |
280 | } | |
52664f50 DSH |
281 | |
282 | int i2d_DSA_PUBKEY(DSA *a, unsigned char **pp) | |
0f113f3e MC |
283 | { |
284 | EVP_PKEY *pktmp; | |
285 | int ret; | |
286 | if (!a) | |
287 | return 0; | |
288 | pktmp = EVP_PKEY_new(); | |
90945fa3 | 289 | if (pktmp == NULL) { |
0f113f3e MC |
290 | ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE); |
291 | return 0; | |
292 | } | |
293 | EVP_PKEY_set1_DSA(pktmp, a); | |
294 | ret = i2d_PUBKEY(pktmp, pp); | |
295 | EVP_PKEY_free(pktmp); | |
296 | return ret; | |
297 | } | |
4d94ae00 BM |
298 | #endif |
299 | ||
14a7cfb3 | 300 | #ifndef OPENSSL_NO_EC |
6343829a | 301 | EC_KEY *d2i_EC_PUBKEY(EC_KEY **a, const unsigned char **pp, long length) |
0f113f3e MC |
302 | { |
303 | EVP_PKEY *pkey; | |
304 | EC_KEY *key; | |
305 | const unsigned char *q; | |
306 | q = *pp; | |
307 | pkey = d2i_PUBKEY(NULL, &q, length); | |
308 | if (!pkey) | |
309 | return (NULL); | |
310 | key = EVP_PKEY_get1_EC_KEY(pkey); | |
311 | EVP_PKEY_free(pkey); | |
312 | if (!key) | |
313 | return (NULL); | |
314 | *pp = q; | |
315 | if (a) { | |
316 | EC_KEY_free(*a); | |
317 | *a = key; | |
318 | } | |
319 | return (key); | |
320 | } | |
4d94ae00 | 321 | |
14a7cfb3 | 322 | int i2d_EC_PUBKEY(EC_KEY *a, unsigned char **pp) |
0f113f3e MC |
323 | { |
324 | EVP_PKEY *pktmp; | |
325 | int ret; | |
326 | if (!a) | |
327 | return (0); | |
328 | if ((pktmp = EVP_PKEY_new()) == NULL) { | |
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 | } | |
12aefe78 | 337 | #endif |
448be743 DSH |
338 | |
339 | int X509_PUBKEY_set0_param(X509_PUBKEY *pub, ASN1_OBJECT *aobj, | |
0f113f3e MC |
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) { | |
b548a1f1 | 346 | OPENSSL_free(pub->public_key->data); |
0f113f3e MC |
347 | pub->public_key->data = penc; |
348 | pub->public_key->length = penclen; | |
349 | /* Set number of unused bits to zero */ | |
350 | pub->public_key->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
351 | pub->public_key->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
352 | } | |
353 | return 1; | |
354 | } | |
448be743 DSH |
355 | |
356 | int X509_PUBKEY_get0_param(ASN1_OBJECT **ppkalg, | |
0f113f3e MC |
357 | const unsigned char **pk, int *ppklen, |
358 | X509_ALGOR **pa, X509_PUBKEY *pub) | |
359 | { | |
360 | if (ppkalg) | |
361 | *ppkalg = pub->algor->algorithm; | |
362 | if (pk) { | |
363 | *pk = pub->public_key->data; | |
364 | *ppklen = pub->public_key->length; | |
365 | } | |
366 | if (pa) | |
367 | *pa = pub->algor; | |
368 | return 1; | |
369 | } |