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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 | ||
10 | #include <stdio.h> | |
b39fc560 | 11 | #include "internal/cryptlib.h" |
9d6b1ce6 | 12 | #include <openssl/asn1t.h> |
f0e8ae72 | 13 | #include <openssl/x509.h> |
5fe736e5 | 14 | #include "internal/asn1_int.h" |
3aeb9348 | 15 | #include "internal/evp_int.h" |
29fa0a1a | 16 | #include "internal/x509_int.h" |
3c27208f RS |
17 | #include <openssl/rsa.h> |
18 | #include <openssl/dsa.h> | |
d02b48c6 | 19 | |
29fa0a1a DSH |
20 | struct X509_pubkey_st { |
21 | X509_ALGOR *algor; | |
22 | ASN1_BIT_STRING *public_key; | |
23 | EVP_PKEY *pkey; | |
29fa0a1a DSH |
24 | }; |
25 | ||
fa0a9d71 DSH |
26 | static int x509_pubkey_decode(EVP_PKEY **pk, X509_PUBKEY *key); |
27 | ||
9d6b1ce6 | 28 | /* Minor tweak to operation: free up EVP_PKEY */ |
24484759 | 29 | static int pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, |
0f113f3e MC |
30 | void *exarg) |
31 | { | |
32 | if (operation == ASN1_OP_FREE_POST) { | |
33 | X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval; | |
34 | EVP_PKEY_free(pubkey->pkey); | |
d2ec189f DSH |
35 | } else if (operation == ASN1_OP_D2I_POST) { |
36 | /* Attempt to decode public key and cache in pubkey structure. */ | |
37 | X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval; | |
38 | EVP_PKEY_free(pubkey->pkey); | |
5dc40a83 | 39 | pubkey->pkey = NULL; |
d2ec189f | 40 | /* |
fa0a9d71 DSH |
41 | * Opportunistically decode the key but remove any non fatal errors |
42 | * from the queue. Subsequent explicit attempts to decode/use the key | |
43 | * will return an appropriate error. | |
d2ec189f DSH |
44 | */ |
45 | ERR_set_mark(); | |
fa0a9d71 DSH |
46 | if (x509_pubkey_decode(&pubkey->pkey, pubkey) == -1) |
47 | return 0; | |
d2ec189f | 48 | ERR_pop_to_mark(); |
0f113f3e MC |
49 | } |
50 | return 1; | |
51 | } | |
d02b48c6 | 52 | |
9d6b1ce6 | 53 | ASN1_SEQUENCE_cb(X509_PUBKEY, pubkey_cb) = { |
0f113f3e MC |
54 | ASN1_SIMPLE(X509_PUBKEY, algor, X509_ALGOR), |
55 | ASN1_SIMPLE(X509_PUBKEY, public_key, ASN1_BIT_STRING) | |
d339187b | 56 | } ASN1_SEQUENCE_END_cb(X509_PUBKEY, X509_PUBKEY) |
d02b48c6 | 57 | |
9d6b1ce6 | 58 | IMPLEMENT_ASN1_FUNCTIONS(X509_PUBKEY) |
d02b48c6 | 59 | |
9fdcc21f | 60 | /* TODO should better be called X509_PUBKEY_set1 */ |
6b691a5c | 61 | int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey) |
0f113f3e MC |
62 | { |
63 | X509_PUBKEY *pk = NULL; | |
64 | ||
65 | if (x == NULL) | |
26a7d938 | 66 | return 0; |
0f113f3e MC |
67 | |
68 | if ((pk = X509_PUBKEY_new()) == NULL) | |
69 | goto error; | |
70 | ||
9fdcc21f | 71 | if (pkey != NULL && pkey->ameth) { |
0f113f3e MC |
72 | if (pkey->ameth->pub_encode) { |
73 | if (!pkey->ameth->pub_encode(pk, pkey)) { | |
74 | X509err(X509_F_X509_PUBKEY_SET, | |
75 | X509_R_PUBLIC_KEY_ENCODE_ERROR); | |
76 | goto error; | |
77 | } | |
78 | } else { | |
79 | X509err(X509_F_X509_PUBKEY_SET, X509_R_METHOD_NOT_SUPPORTED); | |
80 | goto error; | |
81 | } | |
82 | } else { | |
83 | X509err(X509_F_X509_PUBKEY_SET, X509_R_UNSUPPORTED_ALGORITHM); | |
84 | goto error; | |
85 | } | |
86 | ||
222561fe | 87 | X509_PUBKEY_free(*x); |
0f113f3e | 88 | *x = pk; |
fa0a9d71 | 89 | pk->pkey = pkey; |
9fdcc21f | 90 | return EVP_PKEY_up_ref(pkey); |
222561fe | 91 | |
0f113f3e | 92 | error: |
222561fe | 93 | X509_PUBKEY_free(pk); |
0f113f3e MC |
94 | return 0; |
95 | } | |
d02b48c6 | 96 | |
fa0a9d71 DSH |
97 | /* |
98 | * Attempt to decode a public key. | |
99 | * Returns 1 on success, 0 for a decode failure and -1 for a fatal | |
100 | * error e.g. malloc failure. | |
101 | */ | |
0f113f3e | 102 | |
0f113f3e | 103 | |
fa0a9d71 | 104 | static int x509_pubkey_decode(EVP_PKEY **ppkey, X509_PUBKEY *key) |
7fcdbd83 | 105 | { |
fa0a9d71 | 106 | EVP_PKEY *pkey = EVP_PKEY_new(); |
0f113f3e | 107 | |
fa0a9d71 DSH |
108 | if (pkey == NULL) { |
109 | X509err(X509_F_X509_PUBKEY_DECODE, ERR_R_MALLOC_FAILURE); | |
110 | return -1; | |
0f113f3e MC |
111 | } |
112 | ||
fa0a9d71 DSH |
113 | if (!EVP_PKEY_set_type(pkey, OBJ_obj2nid(key->algor->algorithm))) { |
114 | X509err(X509_F_X509_PUBKEY_DECODE, X509_R_UNSUPPORTED_ALGORITHM); | |
0f113f3e MC |
115 | goto error; |
116 | } | |
117 | ||
fa0a9d71 DSH |
118 | if (pkey->ameth->pub_decode) { |
119 | /* | |
120 | * Treat any failure of pub_decode as a decode error. In | |
121 | * future we could have different return codes for decode | |
122 | * errors and fatal errors such as malloc failure. | |
123 | */ | |
124 | if (!pkey->ameth->pub_decode(pkey, key)) { | |
125 | X509err(X509_F_X509_PUBKEY_DECODE, X509_R_PUBLIC_KEY_DECODE_ERROR); | |
0f113f3e MC |
126 | goto error; |
127 | } | |
128 | } else { | |
fa0a9d71 | 129 | X509err(X509_F_X509_PUBKEY_DECODE, X509_R_METHOD_NOT_SUPPORTED); |
0f113f3e MC |
130 | goto error; |
131 | } | |
132 | ||
fa0a9d71 DSH |
133 | *ppkey = pkey; |
134 | return 1; | |
0f113f3e MC |
135 | |
136 | error: | |
fa0a9d71 DSH |
137 | EVP_PKEY_free(pkey); |
138 | return 0; | |
139 | } | |
140 | ||
141 | EVP_PKEY *X509_PUBKEY_get0(X509_PUBKEY *key) | |
142 | { | |
143 | EVP_PKEY *ret = NULL; | |
144 | ||
145 | if (key == NULL || key->public_key == NULL) | |
146 | return NULL; | |
147 | ||
148 | if (key->pkey != NULL) | |
149 | return key->pkey; | |
150 | ||
151 | /* | |
152 | * When the key ASN.1 is initially parsed an attempt is made to | |
153 | * decode the public key and cache the EVP_PKEY structure. If this | |
154 | * operation fails the cached value will be NULL. Parsing continues | |
155 | * to allow parsing of unknown key types or unsupported forms. | |
156 | * We repeat the decode operation so the appropriate errors are left | |
157 | * in the queue. | |
158 | */ | |
159 | x509_pubkey_decode(&ret, key); | |
160 | /* If decode doesn't fail something bad happened */ | |
161 | if (ret != NULL) { | |
162 | X509err(X509_F_X509_PUBKEY_GET0, ERR_R_INTERNAL_ERROR); | |
163 | EVP_PKEY_free(ret); | |
164 | } | |
165 | ||
166 | return NULL; | |
0f113f3e MC |
167 | } |
168 | ||
c01ff880 DSH |
169 | EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key) |
170 | { | |
171 | EVP_PKEY *ret = X509_PUBKEY_get0(key); | |
172 | if (ret != NULL) | |
173 | EVP_PKEY_up_ref(ret); | |
174 | return ret; | |
175 | } | |
176 | ||
0f113f3e MC |
177 | /* |
178 | * Now two pseudo ASN1 routines that take an EVP_PKEY structure and encode or | |
179 | * decode as X509_PUBKEY | |
52664f50 DSH |
180 | */ |
181 | ||
0f113f3e MC |
182 | EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp, long length) |
183 | { | |
184 | X509_PUBKEY *xpk; | |
185 | EVP_PKEY *pktmp; | |
a46c9789 KR |
186 | const unsigned char *q; |
187 | q = *pp; | |
188 | xpk = d2i_X509_PUBKEY(NULL, &q, length); | |
0f113f3e MC |
189 | if (!xpk) |
190 | return NULL; | |
191 | pktmp = X509_PUBKEY_get(xpk); | |
192 | X509_PUBKEY_free(xpk); | |
193 | if (!pktmp) | |
194 | return NULL; | |
a46c9789 | 195 | *pp = q; |
0f113f3e MC |
196 | if (a) { |
197 | EVP_PKEY_free(*a); | |
198 | *a = pktmp; | |
199 | } | |
200 | return pktmp; | |
201 | } | |
52664f50 | 202 | |
9fdcc21f | 203 | int i2d_PUBKEY(const EVP_PKEY *a, unsigned char **pp) |
0f113f3e MC |
204 | { |
205 | X509_PUBKEY *xpk = NULL; | |
9fdcc21f DO |
206 | int ret = -1; |
207 | ||
208 | if (a == NULL) | |
0f113f3e | 209 | return 0; |
9fdcc21f | 210 | if ((xpk = X509_PUBKEY_new()) == NULL) |
157997f0 | 211 | return -1; |
9fdcc21f DO |
212 | if (a->ameth != NULL && a->ameth->pub_encode != NULL |
213 | && !a->ameth->pub_encode(xpk, a)) | |
214 | goto error; | |
215 | xpk->pkey = (EVP_PKEY *)a; | |
0f113f3e | 216 | ret = i2d_X509_PUBKEY(xpk, pp); |
9fdcc21f DO |
217 | xpk->pkey = NULL; |
218 | error: | |
0f113f3e MC |
219 | X509_PUBKEY_free(xpk); |
220 | return ret; | |
221 | } | |
222 | ||
223 | /* | |
224 | * The following are equivalents but which return RSA and DSA keys | |
52664f50 | 225 | */ |
cf1b7d96 | 226 | #ifndef OPENSSL_NO_RSA |
0f113f3e MC |
227 | RSA *d2i_RSA_PUBKEY(RSA **a, const unsigned char **pp, long length) |
228 | { | |
229 | EVP_PKEY *pkey; | |
230 | RSA *key; | |
231 | const unsigned char *q; | |
232 | q = *pp; | |
233 | pkey = d2i_PUBKEY(NULL, &q, length); | |
234 | if (!pkey) | |
235 | return NULL; | |
236 | key = EVP_PKEY_get1_RSA(pkey); | |
237 | EVP_PKEY_free(pkey); | |
238 | if (!key) | |
239 | return NULL; | |
240 | *pp = q; | |
241 | if (a) { | |
242 | RSA_free(*a); | |
243 | *a = key; | |
244 | } | |
245 | return key; | |
246 | } | |
52664f50 | 247 | |
9fdcc21f | 248 | int i2d_RSA_PUBKEY(const RSA *a, unsigned char **pp) |
0f113f3e MC |
249 | { |
250 | EVP_PKEY *pktmp; | |
251 | int ret; | |
252 | if (!a) | |
253 | return 0; | |
254 | pktmp = EVP_PKEY_new(); | |
90945fa3 | 255 | if (pktmp == NULL) { |
0f113f3e | 256 | ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE); |
157997f0 | 257 | return -1; |
0f113f3e | 258 | } |
9fdcc21f | 259 | (void)EVP_PKEY_assign_RSA(pktmp, (RSA *)a); |
0f113f3e | 260 | ret = i2d_PUBKEY(pktmp, pp); |
9fdcc21f | 261 | pktmp->pkey.ptr = NULL; |
0f113f3e MC |
262 | EVP_PKEY_free(pktmp); |
263 | return ret; | |
264 | } | |
12aefe78 | 265 | #endif |
52664f50 | 266 | |
cf1b7d96 | 267 | #ifndef OPENSSL_NO_DSA |
0f113f3e MC |
268 | DSA *d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp, long length) |
269 | { | |
270 | EVP_PKEY *pkey; | |
271 | DSA *key; | |
272 | const unsigned char *q; | |
273 | q = *pp; | |
274 | pkey = d2i_PUBKEY(NULL, &q, length); | |
275 | if (!pkey) | |
276 | return NULL; | |
277 | key = EVP_PKEY_get1_DSA(pkey); | |
278 | EVP_PKEY_free(pkey); | |
279 | if (!key) | |
280 | return NULL; | |
281 | *pp = q; | |
282 | if (a) { | |
283 | DSA_free(*a); | |
284 | *a = key; | |
285 | } | |
286 | return key; | |
287 | } | |
52664f50 | 288 | |
9fdcc21f | 289 | int i2d_DSA_PUBKEY(const DSA *a, unsigned char **pp) |
0f113f3e MC |
290 | { |
291 | EVP_PKEY *pktmp; | |
292 | int ret; | |
293 | if (!a) | |
294 | return 0; | |
295 | pktmp = EVP_PKEY_new(); | |
90945fa3 | 296 | if (pktmp == NULL) { |
0f113f3e | 297 | ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE); |
157997f0 | 298 | return -1; |
0f113f3e | 299 | } |
9fdcc21f | 300 | (void)EVP_PKEY_assign_DSA(pktmp, (DSA *)a); |
0f113f3e | 301 | ret = i2d_PUBKEY(pktmp, pp); |
9fdcc21f | 302 | pktmp->pkey.ptr = NULL; |
0f113f3e MC |
303 | EVP_PKEY_free(pktmp); |
304 | return ret; | |
305 | } | |
4d94ae00 BM |
306 | #endif |
307 | ||
14a7cfb3 | 308 | #ifndef OPENSSL_NO_EC |
6343829a | 309 | EC_KEY *d2i_EC_PUBKEY(EC_KEY **a, const unsigned char **pp, long length) |
0f113f3e MC |
310 | { |
311 | EVP_PKEY *pkey; | |
312 | EC_KEY *key; | |
313 | const unsigned char *q; | |
314 | q = *pp; | |
315 | pkey = d2i_PUBKEY(NULL, &q, length); | |
316 | if (!pkey) | |
26a7d938 | 317 | return NULL; |
0f113f3e MC |
318 | key = EVP_PKEY_get1_EC_KEY(pkey); |
319 | EVP_PKEY_free(pkey); | |
320 | if (!key) | |
26a7d938 | 321 | return NULL; |
0f113f3e MC |
322 | *pp = q; |
323 | if (a) { | |
324 | EC_KEY_free(*a); | |
325 | *a = key; | |
326 | } | |
26a7d938 | 327 | return key; |
0f113f3e | 328 | } |
4d94ae00 | 329 | |
9fdcc21f | 330 | int i2d_EC_PUBKEY(const EC_KEY *a, unsigned char **pp) |
0f113f3e MC |
331 | { |
332 | EVP_PKEY *pktmp; | |
333 | int ret; | |
334 | if (!a) | |
26a7d938 | 335 | return 0; |
0f113f3e MC |
336 | if ((pktmp = EVP_PKEY_new()) == NULL) { |
337 | ASN1err(ASN1_F_I2D_EC_PUBKEY, ERR_R_MALLOC_FAILURE); | |
157997f0 | 338 | return -1; |
0f113f3e | 339 | } |
9fdcc21f | 340 | (void)EVP_PKEY_assign_EC_KEY(pktmp, (EC_KEY *)a); |
0f113f3e | 341 | ret = i2d_PUBKEY(pktmp, pp); |
9fdcc21f | 342 | pktmp->pkey.ptr = NULL; |
0f113f3e | 343 | EVP_PKEY_free(pktmp); |
26a7d938 | 344 | return ret; |
0f113f3e | 345 | } |
12aefe78 | 346 | #endif |
448be743 DSH |
347 | |
348 | int X509_PUBKEY_set0_param(X509_PUBKEY *pub, ASN1_OBJECT *aobj, | |
0f113f3e MC |
349 | int ptype, void *pval, |
350 | unsigned char *penc, int penclen) | |
351 | { | |
352 | if (!X509_ALGOR_set0(pub->algor, aobj, ptype, pval)) | |
353 | return 0; | |
354 | if (penc) { | |
b548a1f1 | 355 | OPENSSL_free(pub->public_key->data); |
0f113f3e MC |
356 | pub->public_key->data = penc; |
357 | pub->public_key->length = penclen; | |
358 | /* Set number of unused bits to zero */ | |
359 | pub->public_key->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
360 | pub->public_key->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
361 | } | |
362 | return 1; | |
363 | } | |
448be743 DSH |
364 | |
365 | int X509_PUBKEY_get0_param(ASN1_OBJECT **ppkalg, | |
0f113f3e MC |
366 | const unsigned char **pk, int *ppklen, |
367 | X509_ALGOR **pa, X509_PUBKEY *pub) | |
368 | { | |
369 | if (ppkalg) | |
370 | *ppkalg = pub->algor->algorithm; | |
371 | if (pk) { | |
372 | *pk = pub->public_key->data; | |
373 | *ppklen = pub->public_key->length; | |
374 | } | |
375 | if (pa) | |
376 | *pa = pub->algor; | |
377 | return 1; | |
378 | } | |
29fa0a1a DSH |
379 | |
380 | ASN1_BIT_STRING *X509_get0_pubkey_bitstr(const X509 *x) | |
381 | { | |
382 | if (x == NULL) | |
383 | return NULL; | |
384 | return x->cert_info.key->public_key; | |
385 | } |