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58964a49 | 1 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
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. | |
0f113f3e | 7 | * |
d02b48c6 RE |
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). | |
0f113f3e | 14 | * |
d02b48c6 RE |
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. | |
0f113f3e | 21 | * |
d02b48c6 RE |
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 :-). | |
0f113f3e | 36 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
37 | * the apps directory (application code) you must include an acknowledgement: |
38 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 39 | * |
d02b48c6 RE |
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. | |
0f113f3e | 51 | * |
d02b48c6 RE |
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 | ||
58 | #include <stdio.h> | |
b39fc560 | 59 | #include "internal/cryptlib.h" |
9d6b1ce6 | 60 | #include <openssl/asn1t.h> |
f0e8ae72 | 61 | #include <openssl/x509.h> |
5fe736e5 | 62 | #include "internal/asn1_int.h" |
3aeb9348 | 63 | #include "internal/evp_int.h" |
29fa0a1a | 64 | #include "internal/x509_int.h" |
3c27208f RS |
65 | #include <openssl/rsa.h> |
66 | #include <openssl/dsa.h> | |
d02b48c6 | 67 | |
29fa0a1a DSH |
68 | struct X509_pubkey_st { |
69 | X509_ALGOR *algor; | |
70 | ASN1_BIT_STRING *public_key; | |
71 | EVP_PKEY *pkey; | |
29fa0a1a DSH |
72 | }; |
73 | ||
fa0a9d71 DSH |
74 | static int x509_pubkey_decode(EVP_PKEY **pk, X509_PUBKEY *key); |
75 | ||
9d6b1ce6 | 76 | /* Minor tweak to operation: free up EVP_PKEY */ |
24484759 | 77 | static int pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, |
0f113f3e MC |
78 | void *exarg) |
79 | { | |
80 | if (operation == ASN1_OP_FREE_POST) { | |
81 | X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval; | |
82 | EVP_PKEY_free(pubkey->pkey); | |
d2ec189f DSH |
83 | } else if (operation == ASN1_OP_D2I_POST) { |
84 | /* Attempt to decode public key and cache in pubkey structure. */ | |
85 | X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval; | |
86 | EVP_PKEY_free(pubkey->pkey); | |
87 | /* | |
fa0a9d71 DSH |
88 | * Opportunistically decode the key but remove any non fatal errors |
89 | * from the queue. Subsequent explicit attempts to decode/use the key | |
90 | * will return an appropriate error. | |
d2ec189f DSH |
91 | */ |
92 | ERR_set_mark(); | |
fa0a9d71 DSH |
93 | if (x509_pubkey_decode(&pubkey->pkey, pubkey) == -1) |
94 | return 0; | |
d2ec189f | 95 | ERR_pop_to_mark(); |
0f113f3e MC |
96 | } |
97 | return 1; | |
98 | } | |
d02b48c6 | 99 | |
9d6b1ce6 | 100 | ASN1_SEQUENCE_cb(X509_PUBKEY, pubkey_cb) = { |
0f113f3e MC |
101 | ASN1_SIMPLE(X509_PUBKEY, algor, X509_ALGOR), |
102 | ASN1_SIMPLE(X509_PUBKEY, public_key, ASN1_BIT_STRING) | |
d339187b | 103 | } ASN1_SEQUENCE_END_cb(X509_PUBKEY, X509_PUBKEY) |
d02b48c6 | 104 | |
9d6b1ce6 | 105 | IMPLEMENT_ASN1_FUNCTIONS(X509_PUBKEY) |
d02b48c6 | 106 | |
6b691a5c | 107 | int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey) |
0f113f3e MC |
108 | { |
109 | X509_PUBKEY *pk = NULL; | |
110 | ||
111 | if (x == NULL) | |
112 | return (0); | |
113 | ||
114 | if ((pk = X509_PUBKEY_new()) == NULL) | |
115 | goto error; | |
116 | ||
117 | if (pkey->ameth) { | |
118 | if (pkey->ameth->pub_encode) { | |
119 | if (!pkey->ameth->pub_encode(pk, pkey)) { | |
120 | X509err(X509_F_X509_PUBKEY_SET, | |
121 | X509_R_PUBLIC_KEY_ENCODE_ERROR); | |
122 | goto error; | |
123 | } | |
124 | } else { | |
125 | X509err(X509_F_X509_PUBKEY_SET, X509_R_METHOD_NOT_SUPPORTED); | |
126 | goto error; | |
127 | } | |
128 | } else { | |
129 | X509err(X509_F_X509_PUBKEY_SET, X509_R_UNSUPPORTED_ALGORITHM); | |
130 | goto error; | |
131 | } | |
132 | ||
222561fe | 133 | X509_PUBKEY_free(*x); |
0f113f3e | 134 | *x = pk; |
fa0a9d71 DSH |
135 | pk->pkey = pkey; |
136 | EVP_PKEY_up_ref(pkey); | |
0f113f3e | 137 | return 1; |
222561fe | 138 | |
0f113f3e | 139 | error: |
222561fe | 140 | X509_PUBKEY_free(pk); |
0f113f3e MC |
141 | return 0; |
142 | } | |
d02b48c6 | 143 | |
fa0a9d71 DSH |
144 | /* |
145 | * Attempt to decode a public key. | |
146 | * Returns 1 on success, 0 for a decode failure and -1 for a fatal | |
147 | * error e.g. malloc failure. | |
148 | */ | |
0f113f3e | 149 | |
0f113f3e | 150 | |
fa0a9d71 DSH |
151 | static int x509_pubkey_decode(EVP_PKEY **ppkey, X509_PUBKEY *key) |
152 | { | |
153 | EVP_PKEY *pkey = EVP_PKEY_new(); | |
0f113f3e | 154 | |
fa0a9d71 DSH |
155 | if (pkey == NULL) { |
156 | X509err(X509_F_X509_PUBKEY_DECODE, ERR_R_MALLOC_FAILURE); | |
157 | return -1; | |
0f113f3e MC |
158 | } |
159 | ||
fa0a9d71 DSH |
160 | if (!EVP_PKEY_set_type(pkey, OBJ_obj2nid(key->algor->algorithm))) { |
161 | X509err(X509_F_X509_PUBKEY_DECODE, X509_R_UNSUPPORTED_ALGORITHM); | |
0f113f3e MC |
162 | goto error; |
163 | } | |
164 | ||
fa0a9d71 DSH |
165 | if (pkey->ameth->pub_decode) { |
166 | /* | |
167 | * Treat any failure of pub_decode as a decode error. In | |
168 | * future we could have different return codes for decode | |
169 | * errors and fatal errors such as malloc failure. | |
170 | */ | |
171 | if (!pkey->ameth->pub_decode(pkey, key)) { | |
172 | X509err(X509_F_X509_PUBKEY_DECODE, X509_R_PUBLIC_KEY_DECODE_ERROR); | |
0f113f3e MC |
173 | goto error; |
174 | } | |
175 | } else { | |
fa0a9d71 | 176 | X509err(X509_F_X509_PUBKEY_DECODE, X509_R_METHOD_NOT_SUPPORTED); |
0f113f3e MC |
177 | goto error; |
178 | } | |
179 | ||
fa0a9d71 DSH |
180 | *ppkey = pkey; |
181 | return 1; | |
0f113f3e MC |
182 | |
183 | error: | |
fa0a9d71 DSH |
184 | EVP_PKEY_free(pkey); |
185 | return 0; | |
186 | } | |
187 | ||
188 | EVP_PKEY *X509_PUBKEY_get0(X509_PUBKEY *key) | |
189 | { | |
190 | EVP_PKEY *ret = NULL; | |
191 | ||
192 | if (key == NULL || key->public_key == NULL) | |
193 | return NULL; | |
194 | ||
195 | if (key->pkey != NULL) | |
196 | return key->pkey; | |
197 | ||
198 | /* | |
199 | * When the key ASN.1 is initially parsed an attempt is made to | |
200 | * decode the public key and cache the EVP_PKEY structure. If this | |
201 | * operation fails the cached value will be NULL. Parsing continues | |
202 | * to allow parsing of unknown key types or unsupported forms. | |
203 | * We repeat the decode operation so the appropriate errors are left | |
204 | * in the queue. | |
205 | */ | |
206 | x509_pubkey_decode(&ret, key); | |
207 | /* If decode doesn't fail something bad happened */ | |
208 | if (ret != NULL) { | |
209 | X509err(X509_F_X509_PUBKEY_GET0, ERR_R_INTERNAL_ERROR); | |
210 | EVP_PKEY_free(ret); | |
211 | } | |
212 | ||
213 | return NULL; | |
0f113f3e MC |
214 | } |
215 | ||
c01ff880 DSH |
216 | EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key) |
217 | { | |
218 | EVP_PKEY *ret = X509_PUBKEY_get0(key); | |
219 | if (ret != NULL) | |
220 | EVP_PKEY_up_ref(ret); | |
221 | return ret; | |
222 | } | |
223 | ||
0f113f3e MC |
224 | /* |
225 | * Now two pseudo ASN1 routines that take an EVP_PKEY structure and encode or | |
226 | * decode as X509_PUBKEY | |
52664f50 DSH |
227 | */ |
228 | ||
0f113f3e MC |
229 | EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp, long length) |
230 | { | |
231 | X509_PUBKEY *xpk; | |
232 | EVP_PKEY *pktmp; | |
a46c9789 KR |
233 | const unsigned char *q; |
234 | q = *pp; | |
235 | xpk = d2i_X509_PUBKEY(NULL, &q, length); | |
0f113f3e MC |
236 | if (!xpk) |
237 | return NULL; | |
238 | pktmp = X509_PUBKEY_get(xpk); | |
239 | X509_PUBKEY_free(xpk); | |
240 | if (!pktmp) | |
241 | return NULL; | |
a46c9789 | 242 | *pp = q; |
0f113f3e MC |
243 | if (a) { |
244 | EVP_PKEY_free(*a); | |
245 | *a = pktmp; | |
246 | } | |
247 | return pktmp; | |
248 | } | |
52664f50 DSH |
249 | |
250 | int i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp) | |
0f113f3e MC |
251 | { |
252 | X509_PUBKEY *xpk = NULL; | |
253 | int ret; | |
254 | if (!a) | |
255 | return 0; | |
256 | if (!X509_PUBKEY_set(&xpk, a)) | |
257 | return 0; | |
258 | ret = i2d_X509_PUBKEY(xpk, pp); | |
259 | X509_PUBKEY_free(xpk); | |
260 | return ret; | |
261 | } | |
262 | ||
263 | /* | |
264 | * The following are equivalents but which return RSA and DSA keys | |
52664f50 | 265 | */ |
cf1b7d96 | 266 | #ifndef OPENSSL_NO_RSA |
0f113f3e MC |
267 | RSA *d2i_RSA_PUBKEY(RSA **a, const unsigned char **pp, long length) |
268 | { | |
269 | EVP_PKEY *pkey; | |
270 | RSA *key; | |
271 | const unsigned char *q; | |
272 | q = *pp; | |
273 | pkey = d2i_PUBKEY(NULL, &q, length); | |
274 | if (!pkey) | |
275 | return NULL; | |
276 | key = EVP_PKEY_get1_RSA(pkey); | |
277 | EVP_PKEY_free(pkey); | |
278 | if (!key) | |
279 | return NULL; | |
280 | *pp = q; | |
281 | if (a) { | |
282 | RSA_free(*a); | |
283 | *a = key; | |
284 | } | |
285 | return key; | |
286 | } | |
52664f50 DSH |
287 | |
288 | int i2d_RSA_PUBKEY(RSA *a, unsigned char **pp) | |
0f113f3e MC |
289 | { |
290 | EVP_PKEY *pktmp; | |
291 | int ret; | |
292 | if (!a) | |
293 | return 0; | |
294 | pktmp = EVP_PKEY_new(); | |
90945fa3 | 295 | if (pktmp == NULL) { |
0f113f3e MC |
296 | ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE); |
297 | return 0; | |
298 | } | |
299 | EVP_PKEY_set1_RSA(pktmp, a); | |
300 | ret = i2d_PUBKEY(pktmp, pp); | |
301 | EVP_PKEY_free(pktmp); | |
302 | return ret; | |
303 | } | |
12aefe78 | 304 | #endif |
52664f50 | 305 | |
cf1b7d96 | 306 | #ifndef OPENSSL_NO_DSA |
0f113f3e MC |
307 | DSA *d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp, long length) |
308 | { | |
309 | EVP_PKEY *pkey; | |
310 | DSA *key; | |
311 | const unsigned char *q; | |
312 | q = *pp; | |
313 | pkey = d2i_PUBKEY(NULL, &q, length); | |
314 | if (!pkey) | |
315 | return NULL; | |
316 | key = EVP_PKEY_get1_DSA(pkey); | |
317 | EVP_PKEY_free(pkey); | |
318 | if (!key) | |
319 | return NULL; | |
320 | *pp = q; | |
321 | if (a) { | |
322 | DSA_free(*a); | |
323 | *a = key; | |
324 | } | |
325 | return key; | |
326 | } | |
52664f50 DSH |
327 | |
328 | int i2d_DSA_PUBKEY(DSA *a, unsigned char **pp) | |
0f113f3e MC |
329 | { |
330 | EVP_PKEY *pktmp; | |
331 | int ret; | |
332 | if (!a) | |
333 | return 0; | |
334 | pktmp = EVP_PKEY_new(); | |
90945fa3 | 335 | if (pktmp == NULL) { |
0f113f3e MC |
336 | ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE); |
337 | return 0; | |
338 | } | |
339 | EVP_PKEY_set1_DSA(pktmp, a); | |
340 | ret = i2d_PUBKEY(pktmp, pp); | |
341 | EVP_PKEY_free(pktmp); | |
342 | return ret; | |
343 | } | |
4d94ae00 BM |
344 | #endif |
345 | ||
14a7cfb3 | 346 | #ifndef OPENSSL_NO_EC |
6343829a | 347 | EC_KEY *d2i_EC_PUBKEY(EC_KEY **a, const unsigned char **pp, long length) |
0f113f3e MC |
348 | { |
349 | EVP_PKEY *pkey; | |
350 | EC_KEY *key; | |
351 | const unsigned char *q; | |
352 | q = *pp; | |
353 | pkey = d2i_PUBKEY(NULL, &q, length); | |
354 | if (!pkey) | |
355 | return (NULL); | |
356 | key = EVP_PKEY_get1_EC_KEY(pkey); | |
357 | EVP_PKEY_free(pkey); | |
358 | if (!key) | |
359 | return (NULL); | |
360 | *pp = q; | |
361 | if (a) { | |
362 | EC_KEY_free(*a); | |
363 | *a = key; | |
364 | } | |
365 | return (key); | |
366 | } | |
4d94ae00 | 367 | |
14a7cfb3 | 368 | int i2d_EC_PUBKEY(EC_KEY *a, unsigned char **pp) |
0f113f3e MC |
369 | { |
370 | EVP_PKEY *pktmp; | |
371 | int ret; | |
372 | if (!a) | |
373 | return (0); | |
374 | if ((pktmp = EVP_PKEY_new()) == NULL) { | |
375 | ASN1err(ASN1_F_I2D_EC_PUBKEY, ERR_R_MALLOC_FAILURE); | |
376 | return (0); | |
377 | } | |
378 | EVP_PKEY_set1_EC_KEY(pktmp, a); | |
379 | ret = i2d_PUBKEY(pktmp, pp); | |
380 | EVP_PKEY_free(pktmp); | |
381 | return (ret); | |
382 | } | |
12aefe78 | 383 | #endif |
448be743 DSH |
384 | |
385 | int X509_PUBKEY_set0_param(X509_PUBKEY *pub, ASN1_OBJECT *aobj, | |
0f113f3e MC |
386 | int ptype, void *pval, |
387 | unsigned char *penc, int penclen) | |
388 | { | |
389 | if (!X509_ALGOR_set0(pub->algor, aobj, ptype, pval)) | |
390 | return 0; | |
391 | if (penc) { | |
b548a1f1 | 392 | OPENSSL_free(pub->public_key->data); |
0f113f3e MC |
393 | pub->public_key->data = penc; |
394 | pub->public_key->length = penclen; | |
395 | /* Set number of unused bits to zero */ | |
396 | pub->public_key->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
397 | pub->public_key->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
398 | } | |
399 | return 1; | |
400 | } | |
448be743 DSH |
401 | |
402 | int X509_PUBKEY_get0_param(ASN1_OBJECT **ppkalg, | |
0f113f3e MC |
403 | const unsigned char **pk, int *ppklen, |
404 | X509_ALGOR **pa, X509_PUBKEY *pub) | |
405 | { | |
406 | if (ppkalg) | |
407 | *ppkalg = pub->algor->algorithm; | |
408 | if (pk) { | |
409 | *pk = pub->public_key->data; | |
410 | *ppklen = pub->public_key->length; | |
411 | } | |
412 | if (pa) | |
413 | *pa = pub->algor; | |
414 | return 1; | |
415 | } | |
29fa0a1a DSH |
416 | |
417 | ASN1_BIT_STRING *X509_get0_pubkey_bitstr(const X509 *x) | |
418 | { | |
419 | if (x == NULL) | |
420 | return NULL; | |
421 | return x->cert_info.key->public_key; | |
422 | } |