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Commit | Line | Data |
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b1322259 | 1 | /* |
6ec5fce2 | 2 | * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved. |
d02b48c6 | 3 | * |
3e4b43b9 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
b1322259 RS |
5 | * this file except in compliance with the License. You can obtain a copy |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
d02b48c6 RE |
8 | */ |
9 | ||
f41ac0ee P |
10 | /* |
11 | * DSA low level APIs are deprecated for public use, but still ok for | |
12 | * internal use. | |
13 | */ | |
14 | #include "internal/deprecated.h" | |
15 | ||
d02b48c6 | 16 | #include <stdio.h> |
b39fc560 | 17 | #include "internal/cryptlib.h" |
9d6b1ce6 | 18 | #include <openssl/asn1t.h> |
f0e8ae72 | 19 | #include <openssl/x509.h> |
25f2138b DMSP |
20 | #include "crypto/asn1.h" |
21 | #include "crypto/evp.h" | |
22 | #include "crypto/x509.h" | |
3c27208f RS |
23 | #include <openssl/rsa.h> |
24 | #include <openssl/dsa.h> | |
e56ba0e1 | 25 | #include <openssl/serializer.h> |
d02b48c6 | 26 | |
29fa0a1a DSH |
27 | struct X509_pubkey_st { |
28 | X509_ALGOR *algor; | |
29 | ASN1_BIT_STRING *public_key; | |
30 | EVP_PKEY *pkey; | |
29fa0a1a DSH |
31 | }; |
32 | ||
fa0a9d71 DSH |
33 | static int x509_pubkey_decode(EVP_PKEY **pk, X509_PUBKEY *key); |
34 | ||
9d6b1ce6 | 35 | /* Minor tweak to operation: free up EVP_PKEY */ |
24484759 | 36 | static int pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, |
0f113f3e MC |
37 | void *exarg) |
38 | { | |
39 | if (operation == ASN1_OP_FREE_POST) { | |
40 | X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval; | |
41 | EVP_PKEY_free(pubkey->pkey); | |
d2ec189f DSH |
42 | } else if (operation == ASN1_OP_D2I_POST) { |
43 | /* Attempt to decode public key and cache in pubkey structure. */ | |
44 | X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval; | |
45 | EVP_PKEY_free(pubkey->pkey); | |
5dc40a83 | 46 | pubkey->pkey = NULL; |
d2ec189f | 47 | /* |
fa0a9d71 DSH |
48 | * Opportunistically decode the key but remove any non fatal errors |
49 | * from the queue. Subsequent explicit attempts to decode/use the key | |
50 | * will return an appropriate error. | |
d2ec189f DSH |
51 | */ |
52 | ERR_set_mark(); | |
fa0a9d71 DSH |
53 | if (x509_pubkey_decode(&pubkey->pkey, pubkey) == -1) |
54 | return 0; | |
d2ec189f | 55 | ERR_pop_to_mark(); |
0f113f3e MC |
56 | } |
57 | return 1; | |
58 | } | |
d02b48c6 | 59 | |
9d6b1ce6 | 60 | ASN1_SEQUENCE_cb(X509_PUBKEY, pubkey_cb) = { |
0f113f3e MC |
61 | ASN1_SIMPLE(X509_PUBKEY, algor, X509_ALGOR), |
62 | ASN1_SIMPLE(X509_PUBKEY, public_key, ASN1_BIT_STRING) | |
d339187b | 63 | } ASN1_SEQUENCE_END_cb(X509_PUBKEY, X509_PUBKEY) |
d02b48c6 | 64 | |
9d6b1ce6 | 65 | IMPLEMENT_ASN1_FUNCTIONS(X509_PUBKEY) |
a8f1aabd | 66 | IMPLEMENT_ASN1_DUP_FUNCTION(X509_PUBKEY) |
d02b48c6 | 67 | |
9fdcc21f | 68 | /* TODO should better be called X509_PUBKEY_set1 */ |
6b691a5c | 69 | int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey) |
0f113f3e MC |
70 | { |
71 | X509_PUBKEY *pk = NULL; | |
72 | ||
73 | if (x == NULL) | |
26a7d938 | 74 | return 0; |
0f113f3e | 75 | |
e56ba0e1 RL |
76 | if (pkey == NULL) |
77 | goto unsupported; | |
0f113f3e | 78 | |
e56ba0e1 RL |
79 | if (pkey->ameth != NULL) { |
80 | if ((pk = X509_PUBKEY_new()) == NULL) { | |
81 | X509err(X509_F_X509_PUBKEY_SET, ERR_R_MALLOC_FAILURE); | |
82 | goto error; | |
83 | } | |
84 | if (pkey->ameth->pub_encode != NULL) { | |
0f113f3e MC |
85 | if (!pkey->ameth->pub_encode(pk, pkey)) { |
86 | X509err(X509_F_X509_PUBKEY_SET, | |
87 | X509_R_PUBLIC_KEY_ENCODE_ERROR); | |
88 | goto error; | |
89 | } | |
90 | } else { | |
91 | X509err(X509_F_X509_PUBKEY_SET, X509_R_METHOD_NOT_SUPPORTED); | |
92 | goto error; | |
93 | } | |
e56ba0e1 RL |
94 | } else if (pkey->pkeys[0].keymgmt != NULL) { |
95 | BIO *bmem = BIO_new(BIO_s_mem()); | |
96 | const char *serprop = "format=der,type=public"; | |
97 | OSSL_SERIALIZER_CTX *sctx = | |
98 | OSSL_SERIALIZER_CTX_new_by_EVP_PKEY(pkey, serprop); | |
99 | ||
100 | if (OSSL_SERIALIZER_to_bio(sctx, bmem)) { | |
101 | const unsigned char *der = NULL; | |
102 | long derlen = BIO_get_mem_data(bmem, (char **)&der); | |
103 | ||
104 | pk = d2i_X509_PUBKEY(NULL, &der, derlen); | |
105 | } | |
106 | ||
107 | OSSL_SERIALIZER_CTX_free(sctx); | |
108 | BIO_free(bmem); | |
0f113f3e MC |
109 | } |
110 | ||
e56ba0e1 RL |
111 | if (pk == NULL) |
112 | goto unsupported; | |
113 | ||
222561fe | 114 | X509_PUBKEY_free(*x); |
e56ba0e1 RL |
115 | if (!EVP_PKEY_up_ref(pkey)) { |
116 | X509err(X509_F_X509_PUBKEY_SET, ERR_R_INTERNAL_ERROR); | |
117 | goto error; | |
118 | } | |
0f113f3e | 119 | *x = pk; |
a076951b RL |
120 | |
121 | /* | |
122 | * pk->pkey is NULL when using the legacy routine, but is non-NULL when | |
123 | * going through the serializer, and for all intents and purposes, it's | |
124 | * a perfect copy of |pkey|, just not the same instance. In that case, | |
125 | * we could simply return early, right here. | |
126 | * However, in the interest of being cautious leaning on paranoia, some | |
127 | * application might very well depend on the passed |pkey| being used | |
128 | * and none other, so we spend a few more cycles throwing away the newly | |
129 | * created |pk->pkey| and replace it with |pkey|. | |
130 | * TODO(3.0) Investigate if it's safe to change to simply return here | |
131 | * if |pk->pkey != NULL|. | |
132 | */ | |
133 | if (pk->pkey != NULL) | |
134 | EVP_PKEY_free(pk->pkey); | |
135 | ||
fa0a9d71 | 136 | pk->pkey = pkey; |
e56ba0e1 RL |
137 | return 1; |
138 | ||
139 | unsupported: | |
140 | X509err(X509_F_X509_PUBKEY_SET, X509_R_UNSUPPORTED_ALGORITHM); | |
222561fe | 141 | |
0f113f3e | 142 | error: |
222561fe | 143 | X509_PUBKEY_free(pk); |
0f113f3e MC |
144 | return 0; |
145 | } | |
d02b48c6 | 146 | |
fa0a9d71 DSH |
147 | /* |
148 | * Attempt to decode a public key. | |
149 | * Returns 1 on success, 0 for a decode failure and -1 for a fatal | |
150 | * error e.g. malloc failure. | |
151 | */ | |
0f113f3e | 152 | |
0f113f3e | 153 | |
fa0a9d71 | 154 | static int x509_pubkey_decode(EVP_PKEY **ppkey, X509_PUBKEY *key) |
7fcdbd83 | 155 | { |
fa0a9d71 | 156 | EVP_PKEY *pkey = EVP_PKEY_new(); |
0f113f3e | 157 | |
fa0a9d71 DSH |
158 | if (pkey == NULL) { |
159 | X509err(X509_F_X509_PUBKEY_DECODE, ERR_R_MALLOC_FAILURE); | |
160 | return -1; | |
0f113f3e MC |
161 | } |
162 | ||
fa0a9d71 DSH |
163 | if (!EVP_PKEY_set_type(pkey, OBJ_obj2nid(key->algor->algorithm))) { |
164 | X509err(X509_F_X509_PUBKEY_DECODE, X509_R_UNSUPPORTED_ALGORITHM); | |
0f113f3e MC |
165 | goto error; |
166 | } | |
167 | ||
fa0a9d71 DSH |
168 | if (pkey->ameth->pub_decode) { |
169 | /* | |
170 | * Treat any failure of pub_decode as a decode error. In | |
171 | * future we could have different return codes for decode | |
172 | * errors and fatal errors such as malloc failure. | |
173 | */ | |
174 | if (!pkey->ameth->pub_decode(pkey, key)) { | |
175 | X509err(X509_F_X509_PUBKEY_DECODE, X509_R_PUBLIC_KEY_DECODE_ERROR); | |
0f113f3e MC |
176 | goto error; |
177 | } | |
178 | } else { | |
fa0a9d71 | 179 | X509err(X509_F_X509_PUBKEY_DECODE, X509_R_METHOD_NOT_SUPPORTED); |
0f113f3e MC |
180 | goto error; |
181 | } | |
182 | ||
fa0a9d71 DSH |
183 | *ppkey = pkey; |
184 | return 1; | |
0f113f3e MC |
185 | |
186 | error: | |
fa0a9d71 DSH |
187 | EVP_PKEY_free(pkey); |
188 | return 0; | |
189 | } | |
190 | ||
191 | EVP_PKEY *X509_PUBKEY_get0(X509_PUBKEY *key) | |
192 | { | |
193 | EVP_PKEY *ret = NULL; | |
194 | ||
195 | if (key == NULL || key->public_key == NULL) | |
196 | return NULL; | |
197 | ||
198 | if (key->pkey != NULL) | |
199 | return key->pkey; | |
200 | ||
201 | /* | |
202 | * When the key ASN.1 is initially parsed an attempt is made to | |
203 | * decode the public key and cache the EVP_PKEY structure. If this | |
204 | * operation fails the cached value will be NULL. Parsing continues | |
205 | * to allow parsing of unknown key types or unsupported forms. | |
206 | * We repeat the decode operation so the appropriate errors are left | |
207 | * in the queue. | |
208 | */ | |
209 | x509_pubkey_decode(&ret, key); | |
210 | /* If decode doesn't fail something bad happened */ | |
211 | if (ret != NULL) { | |
212 | X509err(X509_F_X509_PUBKEY_GET0, ERR_R_INTERNAL_ERROR); | |
213 | EVP_PKEY_free(ret); | |
214 | } | |
215 | ||
216 | return NULL; | |
0f113f3e MC |
217 | } |
218 | ||
c01ff880 DSH |
219 | EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key) |
220 | { | |
221 | EVP_PKEY *ret = X509_PUBKEY_get0(key); | |
222 | if (ret != NULL) | |
223 | EVP_PKEY_up_ref(ret); | |
224 | return ret; | |
225 | } | |
226 | ||
0f113f3e MC |
227 | /* |
228 | * Now two pseudo ASN1 routines that take an EVP_PKEY structure and encode or | |
229 | * decode as X509_PUBKEY | |
52664f50 DSH |
230 | */ |
231 | ||
0f113f3e MC |
232 | EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp, long length) |
233 | { | |
234 | X509_PUBKEY *xpk; | |
235 | EVP_PKEY *pktmp; | |
a46c9789 | 236 | const unsigned char *q; |
12a765a5 | 237 | |
a46c9789 KR |
238 | q = *pp; |
239 | xpk = d2i_X509_PUBKEY(NULL, &q, length); | |
12a765a5 | 240 | if (xpk == NULL) |
0f113f3e MC |
241 | return NULL; |
242 | pktmp = X509_PUBKEY_get(xpk); | |
243 | X509_PUBKEY_free(xpk); | |
12a765a5 | 244 | if (pktmp == NULL) |
0f113f3e | 245 | return NULL; |
a46c9789 | 246 | *pp = q; |
12a765a5 | 247 | if (a != NULL) { |
0f113f3e MC |
248 | EVP_PKEY_free(*a); |
249 | *a = pktmp; | |
250 | } | |
251 | return pktmp; | |
252 | } | |
52664f50 | 253 | |
9fdcc21f | 254 | int i2d_PUBKEY(const EVP_PKEY *a, unsigned char **pp) |
0f113f3e MC |
255 | { |
256 | X509_PUBKEY *xpk = NULL; | |
9fdcc21f DO |
257 | int ret = -1; |
258 | ||
259 | if (a == NULL) | |
0f113f3e | 260 | return 0; |
9fdcc21f | 261 | if ((xpk = X509_PUBKEY_new()) == NULL) |
157997f0 | 262 | return -1; |
9fdcc21f DO |
263 | if (a->ameth != NULL && a->ameth->pub_encode != NULL |
264 | && !a->ameth->pub_encode(xpk, a)) | |
265 | goto error; | |
266 | xpk->pkey = (EVP_PKEY *)a; | |
0f113f3e | 267 | ret = i2d_X509_PUBKEY(xpk, pp); |
9fdcc21f DO |
268 | xpk->pkey = NULL; |
269 | error: | |
0f113f3e MC |
270 | X509_PUBKEY_free(xpk); |
271 | return ret; | |
272 | } | |
273 | ||
274 | /* | |
275 | * The following are equivalents but which return RSA and DSA keys | |
52664f50 | 276 | */ |
cf1b7d96 | 277 | #ifndef OPENSSL_NO_RSA |
0f113f3e MC |
278 | RSA *d2i_RSA_PUBKEY(RSA **a, const unsigned char **pp, long length) |
279 | { | |
280 | EVP_PKEY *pkey; | |
281 | RSA *key; | |
282 | const unsigned char *q; | |
12a765a5 | 283 | |
0f113f3e MC |
284 | q = *pp; |
285 | pkey = d2i_PUBKEY(NULL, &q, length); | |
12a765a5 | 286 | if (pkey == NULL) |
0f113f3e MC |
287 | return NULL; |
288 | key = EVP_PKEY_get1_RSA(pkey); | |
289 | EVP_PKEY_free(pkey); | |
12a765a5 | 290 | if (key == NULL) |
0f113f3e MC |
291 | return NULL; |
292 | *pp = q; | |
12a765a5 | 293 | if (a != NULL) { |
0f113f3e MC |
294 | RSA_free(*a); |
295 | *a = key; | |
296 | } | |
297 | return key; | |
298 | } | |
52664f50 | 299 | |
9fdcc21f | 300 | int i2d_RSA_PUBKEY(const RSA *a, unsigned char **pp) |
0f113f3e MC |
301 | { |
302 | EVP_PKEY *pktmp; | |
303 | int ret; | |
304 | if (!a) | |
305 | return 0; | |
306 | pktmp = EVP_PKEY_new(); | |
90945fa3 | 307 | if (pktmp == NULL) { |
0f113f3e | 308 | ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE); |
157997f0 | 309 | return -1; |
0f113f3e | 310 | } |
9fdcc21f | 311 | (void)EVP_PKEY_assign_RSA(pktmp, (RSA *)a); |
0f113f3e | 312 | ret = i2d_PUBKEY(pktmp, pp); |
9fdcc21f | 313 | pktmp->pkey.ptr = NULL; |
0f113f3e MC |
314 | EVP_PKEY_free(pktmp); |
315 | return ret; | |
316 | } | |
12aefe78 | 317 | #endif |
52664f50 | 318 | |
cf1b7d96 | 319 | #ifndef OPENSSL_NO_DSA |
0f113f3e MC |
320 | DSA *d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp, long length) |
321 | { | |
322 | EVP_PKEY *pkey; | |
323 | DSA *key; | |
324 | const unsigned char *q; | |
12a765a5 | 325 | |
0f113f3e MC |
326 | q = *pp; |
327 | pkey = d2i_PUBKEY(NULL, &q, length); | |
12a765a5 | 328 | if (pkey == NULL) |
0f113f3e MC |
329 | return NULL; |
330 | key = EVP_PKEY_get1_DSA(pkey); | |
331 | EVP_PKEY_free(pkey); | |
12a765a5 | 332 | if (key == NULL) |
0f113f3e MC |
333 | return NULL; |
334 | *pp = q; | |
12a765a5 | 335 | if (a != NULL) { |
0f113f3e MC |
336 | DSA_free(*a); |
337 | *a = key; | |
338 | } | |
339 | return key; | |
340 | } | |
52664f50 | 341 | |
9fdcc21f | 342 | int i2d_DSA_PUBKEY(const DSA *a, unsigned char **pp) |
0f113f3e MC |
343 | { |
344 | EVP_PKEY *pktmp; | |
345 | int ret; | |
346 | if (!a) | |
347 | return 0; | |
348 | pktmp = EVP_PKEY_new(); | |
90945fa3 | 349 | if (pktmp == NULL) { |
0f113f3e | 350 | ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE); |
157997f0 | 351 | return -1; |
0f113f3e | 352 | } |
9fdcc21f | 353 | (void)EVP_PKEY_assign_DSA(pktmp, (DSA *)a); |
0f113f3e | 354 | ret = i2d_PUBKEY(pktmp, pp); |
9fdcc21f | 355 | pktmp->pkey.ptr = NULL; |
0f113f3e MC |
356 | EVP_PKEY_free(pktmp); |
357 | return ret; | |
358 | } | |
4d94ae00 BM |
359 | #endif |
360 | ||
14a7cfb3 | 361 | #ifndef OPENSSL_NO_EC |
6343829a | 362 | EC_KEY *d2i_EC_PUBKEY(EC_KEY **a, const unsigned char **pp, long length) |
0f113f3e MC |
363 | { |
364 | EVP_PKEY *pkey; | |
365 | EC_KEY *key; | |
366 | const unsigned char *q; | |
12a765a5 | 367 | |
0f113f3e MC |
368 | q = *pp; |
369 | pkey = d2i_PUBKEY(NULL, &q, length); | |
12a765a5 | 370 | if (pkey == NULL) |
26a7d938 | 371 | return NULL; |
0f113f3e MC |
372 | key = EVP_PKEY_get1_EC_KEY(pkey); |
373 | EVP_PKEY_free(pkey); | |
12a765a5 | 374 | if (key == NULL) |
26a7d938 | 375 | return NULL; |
0f113f3e | 376 | *pp = q; |
12a765a5 | 377 | if (a != NULL) { |
0f113f3e MC |
378 | EC_KEY_free(*a); |
379 | *a = key; | |
380 | } | |
26a7d938 | 381 | return key; |
0f113f3e | 382 | } |
4d94ae00 | 383 | |
9fdcc21f | 384 | int i2d_EC_PUBKEY(const EC_KEY *a, unsigned char **pp) |
0f113f3e MC |
385 | { |
386 | EVP_PKEY *pktmp; | |
387 | int ret; | |
12a765a5 RS |
388 | |
389 | if (a == NULL) | |
26a7d938 | 390 | return 0; |
0f113f3e MC |
391 | if ((pktmp = EVP_PKEY_new()) == NULL) { |
392 | ASN1err(ASN1_F_I2D_EC_PUBKEY, ERR_R_MALLOC_FAILURE); | |
157997f0 | 393 | return -1; |
0f113f3e | 394 | } |
9fdcc21f | 395 | (void)EVP_PKEY_assign_EC_KEY(pktmp, (EC_KEY *)a); |
0f113f3e | 396 | ret = i2d_PUBKEY(pktmp, pp); |
9fdcc21f | 397 | pktmp->pkey.ptr = NULL; |
0f113f3e | 398 | EVP_PKEY_free(pktmp); |
26a7d938 | 399 | return ret; |
0f113f3e | 400 | } |
12aefe78 | 401 | #endif |
448be743 DSH |
402 | |
403 | int X509_PUBKEY_set0_param(X509_PUBKEY *pub, ASN1_OBJECT *aobj, | |
0f113f3e MC |
404 | int ptype, void *pval, |
405 | unsigned char *penc, int penclen) | |
406 | { | |
407 | if (!X509_ALGOR_set0(pub->algor, aobj, ptype, pval)) | |
408 | return 0; | |
409 | if (penc) { | |
b548a1f1 | 410 | OPENSSL_free(pub->public_key->data); |
0f113f3e MC |
411 | pub->public_key->data = penc; |
412 | pub->public_key->length = penclen; | |
413 | /* Set number of unused bits to zero */ | |
414 | pub->public_key->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
415 | pub->public_key->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
416 | } | |
417 | return 1; | |
418 | } | |
448be743 DSH |
419 | |
420 | int X509_PUBKEY_get0_param(ASN1_OBJECT **ppkalg, | |
0f113f3e MC |
421 | const unsigned char **pk, int *ppklen, |
422 | X509_ALGOR **pa, X509_PUBKEY *pub) | |
423 | { | |
424 | if (ppkalg) | |
425 | *ppkalg = pub->algor->algorithm; | |
426 | if (pk) { | |
427 | *pk = pub->public_key->data; | |
428 | *ppklen = pub->public_key->length; | |
429 | } | |
430 | if (pa) | |
431 | *pa = pub->algor; | |
432 | return 1; | |
433 | } | |
29fa0a1a DSH |
434 | |
435 | ASN1_BIT_STRING *X509_get0_pubkey_bitstr(const X509 *x) | |
436 | { | |
437 | if (x == NULL) | |
438 | return NULL; | |
439 | return x->cert_info.key->public_key; | |
440 | } |