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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. | |
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" | |
9d6b1ce6 | 61 | #include <openssl/asn1t.h> |
f0e8ae72 | 62 | #include <openssl/x509.h> |
d02b48c6 | 63 | |
9d6b1ce6 DSH |
64 | /* Minor tweak to operation: free up EVP_PKEY */ |
65 | static int pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it) | |
4d94ae00 BM |
66 | { |
67 | if (operation == ASN1_OP_FREE_POST) | |
68 | { | |
9d6b1ce6 DSH |
69 | X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval; |
70 | EVP_PKEY_free(pubkey->pkey); | |
4d94ae00 | 71 | } |
9d6b1ce6 | 72 | return 1; |
4d94ae00 | 73 | } |
d02b48c6 | 74 | |
9d6b1ce6 DSH |
75 | ASN1_SEQUENCE_cb(X509_PUBKEY, pubkey_cb) = { |
76 | ASN1_SIMPLE(X509_PUBKEY, algor, X509_ALGOR), | |
77 | ASN1_SIMPLE(X509_PUBKEY, public_key, ASN1_BIT_STRING) | |
d339187b | 78 | } ASN1_SEQUENCE_END_cb(X509_PUBKEY, X509_PUBKEY) |
d02b48c6 | 79 | |
9d6b1ce6 | 80 | IMPLEMENT_ASN1_FUNCTIONS(X509_PUBKEY) |
d02b48c6 | 81 | |
6b691a5c | 82 | int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey) |
d02b48c6 RE |
83 | { |
84 | int ok=0; | |
85 | X509_PUBKEY *pk; | |
86 | X509_ALGOR *a; | |
87 | ASN1_OBJECT *o; | |
88 | unsigned char *s,*p; | |
89 | int i; | |
90 | ||
91 | if (x == NULL) return(0); | |
92 | ||
93 | if ((pk=X509_PUBKEY_new()) == NULL) goto err; | |
94 | a=pk->algor; | |
95 | ||
96 | /* set the algorithm id */ | |
97 | if ((o=OBJ_nid2obj(pkey->type)) == NULL) goto err; | |
98 | ASN1_OBJECT_free(a->algorithm); | |
99 | a->algorithm=o; | |
100 | ||
101 | /* Set the parameter list */ | |
102 | if (!pkey->save_parameters || (pkey->type == EVP_PKEY_RSA)) | |
103 | { | |
104 | if ((a->parameter == NULL) || | |
105 | (a->parameter->type != V_ASN1_NULL)) | |
106 | { | |
107 | ASN1_TYPE_free(a->parameter); | |
108 | a->parameter=ASN1_TYPE_new(); | |
109 | a->parameter->type=V_ASN1_NULL; | |
110 | } | |
111 | } | |
cf1b7d96 | 112 | #ifndef OPENSSL_NO_DSA |
4d94ae00 | 113 | else if (pkey->type == EVP_PKEY_DSA) |
d02b48c6 RE |
114 | { |
115 | unsigned char *pp; | |
116 | DSA *dsa; | |
4d94ae00 | 117 | |
d02b48c6 RE |
118 | dsa=pkey->pkey.dsa; |
119 | dsa->write_params=0; | |
120 | ASN1_TYPE_free(a->parameter); | |
121 | i=i2d_DSAparams(dsa,NULL); | |
26a3a48d | 122 | p=(unsigned char *)OPENSSL_malloc(i); |
d02b48c6 RE |
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); | |
26a3a48d | 129 | OPENSSL_free(p); |
d02b48c6 | 130 | } |
d02b48c6 | 131 | #endif |
4d94ae00 BM |
132 | #ifndef OPENSSL_NO_ECDSA |
133 | else if (pkey->type == EVP_PKEY_ECDSA) | |
134 | { | |
135 | unsigned char *pp; | |
136 | ECDSA *ecdsa; | |
137 | ||
138 | ecdsa = pkey->pkey.ecdsa; | |
139 | ecdsa->write_params=0; | |
140 | ASN1_TYPE_free(a->parameter); | |
141 | if ((i = i2d_ECDSAParameters(ecdsa, NULL)) == 0) | |
142 | { | |
143 | X509err(X509_F_X509_PUBKEY_SET, ERR_R_ECDSA_LIB); | |
144 | goto err; | |
145 | } | |
146 | if ((p = (unsigned char *) OPENSSL_malloc(i)) == NULL) | |
147 | { | |
148 | X509err(X509_F_X509_PUBKEY_SET, ERR_R_MALLOC_FAILURE); | |
149 | goto err; | |
150 | } | |
151 | pp = p; | |
152 | if (!i2d_ECDSAParameters(ecdsa, &pp)) | |
153 | { | |
154 | X509err(X509_F_X509_PUBKEY_SET, ERR_R_ECDSA_LIB); | |
155 | OPENSSL_free(p); | |
156 | goto err; | |
157 | } | |
158 | if ((a->parameter = ASN1_TYPE_new()) == NULL) | |
159 | { | |
160 | X509err(X509_F_X509_PUBKEY_SET, ERR_R_ASN1_LIB); | |
161 | OPENSSL_free(p); | |
162 | goto err; | |
163 | } | |
164 | a->parameter->type = V_ASN1_SEQUENCE; | |
165 | if ((a->parameter->value.sequence = ASN1_STRING_new()) == NULL) | |
166 | { | |
167 | X509err(X509_F_X509_PUBKEY_SET, ERR_R_ASN1_LIB); | |
168 | OPENSSL_free(p); | |
169 | goto err; | |
170 | } | |
171 | ASN1_STRING_set(a->parameter->value.sequence, p, i); | |
172 | OPENSSL_free(p); | |
173 | } | |
174 | #endif | |
175 | else if (1) | |
d02b48c6 RE |
176 | { |
177 | X509err(X509_F_X509_PUBKEY_SET,X509_R_UNSUPPORTED_ALGORITHM); | |
178 | goto err; | |
179 | } | |
180 | ||
ad65ce75 | 181 | if ((i=i2d_PublicKey(pkey,NULL)) <= 0) goto err; |
26a3a48d | 182 | if ((s=(unsigned char *)OPENSSL_malloc(i+1)) == NULL) goto err; |
d02b48c6 RE |
183 | p=s; |
184 | i2d_PublicKey(pkey,&p); | |
08e9c1af | 185 | if (!M_ASN1_BIT_STRING_set(pk->public_key,s,i)) goto err; |
c35f549e DSH |
186 | /* Set number of unused bits to zero */ |
187 | pk->public_key->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07); | |
188 | pk->public_key->flags|=ASN1_STRING_FLAG_BITS_LEFT; | |
189 | ||
26a3a48d | 190 | OPENSSL_free(s); |
d02b48c6 | 191 | |
e77066ea | 192 | #if 0 |
d02b48c6 RE |
193 | CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY); |
194 | pk->pkey=pkey; | |
e77066ea | 195 | #endif |
d02b48c6 RE |
196 | |
197 | if (*x != NULL) | |
198 | X509_PUBKEY_free(*x); | |
199 | ||
200 | *x=pk; | |
201 | pk=NULL; | |
202 | ||
203 | ok=1; | |
204 | err: | |
205 | if (pk != NULL) X509_PUBKEY_free(pk); | |
206 | return(ok); | |
207 | } | |
208 | ||
6b691a5c | 209 | EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key) |
d02b48c6 RE |
210 | { |
211 | EVP_PKEY *ret=NULL; | |
212 | long j; | |
213 | int type; | |
214 | unsigned char *p; | |
cf1b7d96 | 215 | #ifndef OPENSSL_NO_DSA |
b7fe2f96 | 216 | const unsigned char *cp; |
d02b48c6 | 217 | X509_ALGOR *a; |
58964a49 RE |
218 | #endif |
219 | ||
220 | if (key == NULL) goto err; | |
221 | ||
cdbb8c2f | 222 | if (key->pkey != NULL) |
4d94ae00 BM |
223 | { |
224 | CRYPTO_add(&key->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY); | |
225 | return(key->pkey); | |
226 | } | |
58964a49 RE |
227 | |
228 | if (key->public_key == NULL) goto err; | |
d02b48c6 | 229 | |
d02b48c6 | 230 | type=OBJ_obj2nid(key->algor->algorithm); |
4d94ae00 | 231 | if ((ret = EVP_PKEY_new()) == NULL) |
d02b48c6 | 232 | { |
4d94ae00 | 233 | X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE); |
d02b48c6 RE |
234 | goto err; |
235 | } | |
4d94ae00 | 236 | ret->type = EVP_PKEY_type(type); |
d02b48c6 | 237 | |
4d94ae00 BM |
238 | /* the parameters must be extracted before the public key (ECDSA!) */ |
239 | ||
d02b48c6 | 240 | a=key->algor; |
4d94ae00 BM |
241 | |
242 | if (0) | |
243 | ; | |
244 | #ifndef OPENSSL_NO_DSA | |
245 | else if (ret->type == EVP_PKEY_DSA) | |
d02b48c6 | 246 | { |
c962479b | 247 | if (a->parameter && (a->parameter->type == V_ASN1_SEQUENCE)) |
d02b48c6 | 248 | { |
4d94ae00 BM |
249 | if ((ret->pkey.dsa = DSA_new()) == NULL) |
250 | { | |
251 | X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE); | |
252 | goto err; | |
253 | } | |
d02b48c6 | 254 | ret->pkey.dsa->write_params=0; |
a4aba800 | 255 | cp=p=a->parameter->value.sequence->data; |
d02b48c6 | 256 | j=a->parameter->value.sequence->length; |
4d94ae00 | 257 | if (!d2i_DSAparams(&ret->pkey.dsa, &cp, (long)j)) |
d02b48c6 RE |
258 | goto err; |
259 | } | |
260 | ret->save_parameters=1; | |
261 | } | |
262 | #endif | |
4d94ae00 BM |
263 | #ifndef OPENSSL_NO_ECDSA |
264 | else if (ret->type == EVP_PKEY_ECDSA) | |
265 | { | |
266 | if (a->parameter && (a->parameter->type == V_ASN1_SEQUENCE)) | |
267 | { | |
268 | if ((ret->pkey.ecdsa= ECDSA_new()) == NULL) | |
269 | { | |
270 | X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE); | |
271 | goto err; | |
272 | } | |
273 | ret->pkey.ecdsa->write_params = 0; | |
274 | cp = p = a->parameter->value.sequence->data; | |
275 | j = a->parameter->value.sequence->length; | |
276 | if (!d2i_ECDSAParameters(&ret->pkey.ecdsa, &cp, (long)j)) | |
277 | { | |
278 | X509err(X509_F_X509_PUBKEY_GET, ERR_R_ECDSA_LIB); | |
279 | goto err; | |
280 | } | |
281 | } | |
282 | ret->save_parameters = 1; | |
283 | } | |
284 | #endif | |
285 | ||
286 | p=key->public_key->data; | |
287 | j=key->public_key->length; | |
288 | if ((ret = d2i_PublicKey(type, &ret, &p, (long)j)) == NULL) | |
289 | { | |
290 | X509err(X509_F_X509_PUBKEY_GET, X509_R_ERR_ASN1_LIB); | |
291 | goto err; | |
292 | } | |
293 | ||
294 | key->pkey = ret; | |
295 | CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_EVP_PKEY); | |
d02b48c6 RE |
296 | return(ret); |
297 | err: | |
298 | if (ret != NULL) | |
299 | EVP_PKEY_free(ret); | |
300 | return(NULL); | |
301 | } | |
302 | ||
52664f50 DSH |
303 | /* Now two pseudo ASN1 routines that take an EVP_PKEY structure |
304 | * and encode or decode as X509_PUBKEY | |
305 | */ | |
306 | ||
307 | EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, unsigned char **pp, | |
308 | long length) | |
4d94ae00 | 309 | { |
52664f50 DSH |
310 | X509_PUBKEY *xpk; |
311 | EVP_PKEY *pktmp; | |
312 | xpk = d2i_X509_PUBKEY(NULL, pp, length); | |
313 | if(!xpk) return NULL; | |
314 | pktmp = X509_PUBKEY_get(xpk); | |
315 | X509_PUBKEY_free(xpk); | |
316 | if(!pktmp) return NULL; | |
4d94ae00 BM |
317 | if(a) |
318 | { | |
52664f50 DSH |
319 | EVP_PKEY_free(*a); |
320 | *a = pktmp; | |
4d94ae00 | 321 | } |
52664f50 | 322 | return pktmp; |
4d94ae00 | 323 | } |
52664f50 DSH |
324 | |
325 | int i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp) | |
4d94ae00 | 326 | { |
52664f50 DSH |
327 | X509_PUBKEY *xpk=NULL; |
328 | int ret; | |
329 | if(!a) return 0; | |
330 | if(!X509_PUBKEY_set(&xpk, a)) return 0; | |
331 | ret = i2d_X509_PUBKEY(xpk, pp); | |
332 | X509_PUBKEY_free(xpk); | |
333 | return ret; | |
4d94ae00 | 334 | } |
52664f50 DSH |
335 | |
336 | /* The following are equivalents but which return RSA and DSA | |
337 | * keys | |
338 | */ | |
cf1b7d96 | 339 | #ifndef OPENSSL_NO_RSA |
52664f50 DSH |
340 | RSA *d2i_RSA_PUBKEY(RSA **a, unsigned char **pp, |
341 | long length) | |
4d94ae00 | 342 | { |
52664f50 DSH |
343 | EVP_PKEY *pkey; |
344 | RSA *key; | |
345 | unsigned char *q; | |
346 | q = *pp; | |
347 | pkey = d2i_PUBKEY(NULL, &q, length); | |
4d94ae00 | 348 | if (!pkey) return NULL; |
c7cb16a8 | 349 | key = EVP_PKEY_get1_RSA(pkey); |
52664f50 | 350 | EVP_PKEY_free(pkey); |
4d94ae00 | 351 | if (!key) return NULL; |
52664f50 | 352 | *pp = q; |
4d94ae00 BM |
353 | if (a) |
354 | { | |
52664f50 DSH |
355 | RSA_free(*a); |
356 | *a = key; | |
4d94ae00 | 357 | } |
52664f50 | 358 | return key; |
4d94ae00 | 359 | } |
52664f50 DSH |
360 | |
361 | int i2d_RSA_PUBKEY(RSA *a, unsigned char **pp) | |
4d94ae00 | 362 | { |
52664f50 DSH |
363 | EVP_PKEY *pktmp; |
364 | int ret; | |
4d94ae00 | 365 | if (!a) return 0; |
52664f50 | 366 | pktmp = EVP_PKEY_new(); |
4d94ae00 BM |
367 | if (!pktmp) |
368 | { | |
52664f50 DSH |
369 | ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE); |
370 | return 0; | |
4d94ae00 | 371 | } |
c7cb16a8 | 372 | EVP_PKEY_set1_RSA(pktmp, a); |
52664f50 DSH |
373 | ret = i2d_PUBKEY(pktmp, pp); |
374 | EVP_PKEY_free(pktmp); | |
375 | return ret; | |
4d94ae00 | 376 | } |
12aefe78 | 377 | #endif |
52664f50 | 378 | |
cf1b7d96 | 379 | #ifndef OPENSSL_NO_DSA |
52664f50 DSH |
380 | DSA *d2i_DSA_PUBKEY(DSA **a, unsigned char **pp, |
381 | long length) | |
4d94ae00 | 382 | { |
52664f50 DSH |
383 | EVP_PKEY *pkey; |
384 | DSA *key; | |
385 | unsigned char *q; | |
386 | q = *pp; | |
387 | pkey = d2i_PUBKEY(NULL, &q, length); | |
4d94ae00 | 388 | if (!pkey) return NULL; |
c7cb16a8 | 389 | key = EVP_PKEY_get1_DSA(pkey); |
52664f50 | 390 | EVP_PKEY_free(pkey); |
4d94ae00 | 391 | if (!key) return NULL; |
52664f50 | 392 | *pp = q; |
4d94ae00 BM |
393 | if (a) |
394 | { | |
52664f50 DSH |
395 | DSA_free(*a); |
396 | *a = key; | |
4d94ae00 | 397 | } |
52664f50 | 398 | return key; |
4d94ae00 | 399 | } |
52664f50 DSH |
400 | |
401 | int i2d_DSA_PUBKEY(DSA *a, unsigned char **pp) | |
4d94ae00 | 402 | { |
52664f50 DSH |
403 | EVP_PKEY *pktmp; |
404 | int ret; | |
405 | if(!a) return 0; | |
406 | pktmp = EVP_PKEY_new(); | |
4d94ae00 BM |
407 | if(!pktmp) |
408 | { | |
52664f50 DSH |
409 | ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE); |
410 | return 0; | |
4d94ae00 | 411 | } |
c7cb16a8 | 412 | EVP_PKEY_set1_DSA(pktmp, a); |
52664f50 DSH |
413 | ret = i2d_PUBKEY(pktmp, pp); |
414 | EVP_PKEY_free(pktmp); | |
415 | return ret; | |
4d94ae00 BM |
416 | } |
417 | #endif | |
418 | ||
419 | #ifndef OPENSSL_NO_ECDSA | |
420 | ECDSA *d2i_ECDSA_PUBKEY(ECDSA **a, unsigned char **pp, long length) | |
421 | { | |
422 | EVP_PKEY *pkey; | |
423 | ECDSA *key; | |
424 | unsigned char *q; | |
425 | q = *pp; | |
426 | pkey = d2i_PUBKEY(NULL, &q, length); | |
427 | if (!pkey) return(NULL); | |
428 | key = EVP_PKEY_get1_ECDSA(pkey); | |
429 | EVP_PKEY_free(pkey); | |
430 | if (!key) return(NULL); | |
431 | *pp = q; | |
432 | if (a) | |
433 | { | |
434 | ECDSA_free(*a); | |
435 | *a = key; | |
436 | } | |
437 | return(key); | |
438 | } | |
439 | ||
440 | int i2d_ECDSA_PUBKEY(ECDSA *a, unsigned char **pp) | |
441 | { | |
442 | EVP_PKEY *pktmp; | |
443 | int ret; | |
444 | if (!a) return(0); | |
445 | if ((pktmp = EVP_PKEY_new()) == NULL) | |
446 | { | |
447 | ASN1err(ASN1_F_I2D_ECDSA_PUBKEY, ERR_R_MALLOC_FAILURE); | |
448 | return(0); | |
449 | } | |
450 | EVP_PKEY_set1_ECDSA(pktmp, a); | |
451 | ret = i2d_PUBKEY(pktmp, pp); | |
452 | EVP_PKEY_free(pktmp); | |
453 | return(ret); | |
454 | } | |
12aefe78 | 455 | #endif |