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Commit | Line | Data |
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b1322259 RS |
1 | /* |
2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. | |
d02b48c6 | 3 | * |
b1322259 RS |
4 | * Licensed under the OpenSSL license (the "License"). You may not use |
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); | |
39 | /* | |
fa0a9d71 DSH |
40 | * Opportunistically decode the key but remove any non fatal errors |
41 | * from the queue. Subsequent explicit attempts to decode/use the key | |
42 | * will return an appropriate error. | |
d2ec189f DSH |
43 | */ |
44 | ERR_set_mark(); | |
fa0a9d71 DSH |
45 | if (x509_pubkey_decode(&pubkey->pkey, pubkey) == -1) |
46 | return 0; | |
d2ec189f | 47 | ERR_pop_to_mark(); |
0f113f3e MC |
48 | } |
49 | return 1; | |
50 | } | |
d02b48c6 | 51 | |
9d6b1ce6 | 52 | ASN1_SEQUENCE_cb(X509_PUBKEY, pubkey_cb) = { |
0f113f3e MC |
53 | ASN1_SIMPLE(X509_PUBKEY, algor, X509_ALGOR), |
54 | ASN1_SIMPLE(X509_PUBKEY, public_key, ASN1_BIT_STRING) | |
d339187b | 55 | } ASN1_SEQUENCE_END_cb(X509_PUBKEY, X509_PUBKEY) |
d02b48c6 | 56 | |
9d6b1ce6 | 57 | IMPLEMENT_ASN1_FUNCTIONS(X509_PUBKEY) |
d02b48c6 | 58 | |
6b691a5c | 59 | int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey) |
0f113f3e MC |
60 | { |
61 | X509_PUBKEY *pk = NULL; | |
62 | ||
63 | if (x == NULL) | |
26a7d938 | 64 | return 0; |
0f113f3e MC |
65 | |
66 | if ((pk = X509_PUBKEY_new()) == NULL) | |
67 | goto error; | |
68 | ||
69 | if (pkey->ameth) { | |
70 | if (pkey->ameth->pub_encode) { | |
71 | if (!pkey->ameth->pub_encode(pk, pkey)) { | |
72 | X509err(X509_F_X509_PUBKEY_SET, | |
73 | X509_R_PUBLIC_KEY_ENCODE_ERROR); | |
74 | goto error; | |
75 | } | |
76 | } else { | |
77 | X509err(X509_F_X509_PUBKEY_SET, X509_R_METHOD_NOT_SUPPORTED); | |
78 | goto error; | |
79 | } | |
80 | } else { | |
81 | X509err(X509_F_X509_PUBKEY_SET, X509_R_UNSUPPORTED_ALGORITHM); | |
82 | goto error; | |
83 | } | |
84 | ||
222561fe | 85 | X509_PUBKEY_free(*x); |
0f113f3e | 86 | *x = pk; |
fa0a9d71 DSH |
87 | pk->pkey = pkey; |
88 | EVP_PKEY_up_ref(pkey); | |
0f113f3e | 89 | return 1; |
222561fe | 90 | |
0f113f3e | 91 | error: |
222561fe | 92 | X509_PUBKEY_free(pk); |
0f113f3e MC |
93 | return 0; |
94 | } | |
d02b48c6 | 95 | |
fa0a9d71 DSH |
96 | /* |
97 | * Attempt to decode a public key. | |
98 | * Returns 1 on success, 0 for a decode failure and -1 for a fatal | |
99 | * error e.g. malloc failure. | |
100 | */ | |
0f113f3e | 101 | |
0f113f3e | 102 | |
fa0a9d71 DSH |
103 | static int x509_pubkey_decode(EVP_PKEY **ppkey, X509_PUBKEY *key) |
104 | { | |
105 | EVP_PKEY *pkey = EVP_PKEY_new(); | |
0f113f3e | 106 | |
fa0a9d71 DSH |
107 | if (pkey == NULL) { |
108 | X509err(X509_F_X509_PUBKEY_DECODE, ERR_R_MALLOC_FAILURE); | |
109 | return -1; | |
0f113f3e MC |
110 | } |
111 | ||
fa0a9d71 DSH |
112 | if (!EVP_PKEY_set_type(pkey, OBJ_obj2nid(key->algor->algorithm))) { |
113 | X509err(X509_F_X509_PUBKEY_DECODE, X509_R_UNSUPPORTED_ALGORITHM); | |
0f113f3e MC |
114 | goto error; |
115 | } | |
116 | ||
fa0a9d71 DSH |
117 | if (pkey->ameth->pub_decode) { |
118 | /* | |
119 | * Treat any failure of pub_decode as a decode error. In | |
120 | * future we could have different return codes for decode | |
121 | * errors and fatal errors such as malloc failure. | |
122 | */ | |
123 | if (!pkey->ameth->pub_decode(pkey, key)) { | |
124 | X509err(X509_F_X509_PUBKEY_DECODE, X509_R_PUBLIC_KEY_DECODE_ERROR); | |
0f113f3e MC |
125 | goto error; |
126 | } | |
127 | } else { | |
fa0a9d71 | 128 | X509err(X509_F_X509_PUBKEY_DECODE, X509_R_METHOD_NOT_SUPPORTED); |
0f113f3e MC |
129 | goto error; |
130 | } | |
131 | ||
fa0a9d71 DSH |
132 | *ppkey = pkey; |
133 | return 1; | |
0f113f3e MC |
134 | |
135 | error: | |
fa0a9d71 DSH |
136 | EVP_PKEY_free(pkey); |
137 | return 0; | |
138 | } | |
139 | ||
140 | EVP_PKEY *X509_PUBKEY_get0(X509_PUBKEY *key) | |
141 | { | |
142 | EVP_PKEY *ret = NULL; | |
143 | ||
144 | if (key == NULL || key->public_key == NULL) | |
145 | return NULL; | |
146 | ||
147 | if (key->pkey != NULL) | |
148 | return key->pkey; | |
149 | ||
150 | /* | |
151 | * When the key ASN.1 is initially parsed an attempt is made to | |
152 | * decode the public key and cache the EVP_PKEY structure. If this | |
153 | * operation fails the cached value will be NULL. Parsing continues | |
154 | * to allow parsing of unknown key types or unsupported forms. | |
155 | * We repeat the decode operation so the appropriate errors are left | |
156 | * in the queue. | |
157 | */ | |
158 | x509_pubkey_decode(&ret, key); | |
159 | /* If decode doesn't fail something bad happened */ | |
160 | if (ret != NULL) { | |
161 | X509err(X509_F_X509_PUBKEY_GET0, ERR_R_INTERNAL_ERROR); | |
162 | EVP_PKEY_free(ret); | |
163 | } | |
164 | ||
165 | return NULL; | |
0f113f3e MC |
166 | } |
167 | ||
c01ff880 DSH |
168 | EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key) |
169 | { | |
170 | EVP_PKEY *ret = X509_PUBKEY_get0(key); | |
171 | if (ret != NULL) | |
172 | EVP_PKEY_up_ref(ret); | |
173 | return ret; | |
174 | } | |
175 | ||
0f113f3e MC |
176 | /* |
177 | * Now two pseudo ASN1 routines that take an EVP_PKEY structure and encode or | |
178 | * decode as X509_PUBKEY | |
52664f50 DSH |
179 | */ |
180 | ||
0f113f3e MC |
181 | EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp, long length) |
182 | { | |
183 | X509_PUBKEY *xpk; | |
184 | EVP_PKEY *pktmp; | |
a46c9789 KR |
185 | const unsigned char *q; |
186 | q = *pp; | |
187 | xpk = d2i_X509_PUBKEY(NULL, &q, length); | |
0f113f3e MC |
188 | if (!xpk) |
189 | return NULL; | |
190 | pktmp = X509_PUBKEY_get(xpk); | |
191 | X509_PUBKEY_free(xpk); | |
192 | if (!pktmp) | |
193 | return NULL; | |
a46c9789 | 194 | *pp = q; |
0f113f3e MC |
195 | if (a) { |
196 | EVP_PKEY_free(*a); | |
197 | *a = pktmp; | |
198 | } | |
199 | return pktmp; | |
200 | } | |
52664f50 DSH |
201 | |
202 | int i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp) | |
0f113f3e MC |
203 | { |
204 | X509_PUBKEY *xpk = NULL; | |
205 | int ret; | |
206 | if (!a) | |
207 | return 0; | |
208 | if (!X509_PUBKEY_set(&xpk, a)) | |
157997f0 | 209 | return -1; |
0f113f3e MC |
210 | ret = i2d_X509_PUBKEY(xpk, pp); |
211 | X509_PUBKEY_free(xpk); | |
212 | return ret; | |
213 | } | |
214 | ||
215 | /* | |
216 | * The following are equivalents but which return RSA and DSA keys | |
52664f50 | 217 | */ |
cf1b7d96 | 218 | #ifndef OPENSSL_NO_RSA |
0f113f3e MC |
219 | RSA *d2i_RSA_PUBKEY(RSA **a, const unsigned char **pp, long length) |
220 | { | |
221 | EVP_PKEY *pkey; | |
222 | RSA *key; | |
223 | const unsigned char *q; | |
224 | q = *pp; | |
225 | pkey = d2i_PUBKEY(NULL, &q, length); | |
226 | if (!pkey) | |
227 | return NULL; | |
228 | key = EVP_PKEY_get1_RSA(pkey); | |
229 | EVP_PKEY_free(pkey); | |
230 | if (!key) | |
231 | return NULL; | |
232 | *pp = q; | |
233 | if (a) { | |
234 | RSA_free(*a); | |
235 | *a = key; | |
236 | } | |
237 | return key; | |
238 | } | |
52664f50 DSH |
239 | |
240 | int i2d_RSA_PUBKEY(RSA *a, unsigned char **pp) | |
0f113f3e MC |
241 | { |
242 | EVP_PKEY *pktmp; | |
243 | int ret; | |
244 | if (!a) | |
245 | return 0; | |
246 | pktmp = EVP_PKEY_new(); | |
90945fa3 | 247 | if (pktmp == NULL) { |
0f113f3e | 248 | ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE); |
157997f0 | 249 | return -1; |
0f113f3e MC |
250 | } |
251 | EVP_PKEY_set1_RSA(pktmp, a); | |
252 | ret = i2d_PUBKEY(pktmp, pp); | |
253 | EVP_PKEY_free(pktmp); | |
254 | return ret; | |
255 | } | |
12aefe78 | 256 | #endif |
52664f50 | 257 | |
cf1b7d96 | 258 | #ifndef OPENSSL_NO_DSA |
0f113f3e MC |
259 | DSA *d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp, long length) |
260 | { | |
261 | EVP_PKEY *pkey; | |
262 | DSA *key; | |
263 | const unsigned char *q; | |
264 | q = *pp; | |
265 | pkey = d2i_PUBKEY(NULL, &q, length); | |
266 | if (!pkey) | |
267 | return NULL; | |
268 | key = EVP_PKEY_get1_DSA(pkey); | |
269 | EVP_PKEY_free(pkey); | |
270 | if (!key) | |
271 | return NULL; | |
272 | *pp = q; | |
273 | if (a) { | |
274 | DSA_free(*a); | |
275 | *a = key; | |
276 | } | |
277 | return key; | |
278 | } | |
52664f50 DSH |
279 | |
280 | int i2d_DSA_PUBKEY(DSA *a, unsigned char **pp) | |
0f113f3e MC |
281 | { |
282 | EVP_PKEY *pktmp; | |
283 | int ret; | |
284 | if (!a) | |
285 | return 0; | |
286 | pktmp = EVP_PKEY_new(); | |
90945fa3 | 287 | if (pktmp == NULL) { |
0f113f3e | 288 | ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE); |
157997f0 | 289 | return -1; |
0f113f3e MC |
290 | } |
291 | EVP_PKEY_set1_DSA(pktmp, a); | |
292 | ret = i2d_PUBKEY(pktmp, pp); | |
293 | EVP_PKEY_free(pktmp); | |
294 | return ret; | |
295 | } | |
4d94ae00 BM |
296 | #endif |
297 | ||
14a7cfb3 | 298 | #ifndef OPENSSL_NO_EC |
6343829a | 299 | EC_KEY *d2i_EC_PUBKEY(EC_KEY **a, const unsigned char **pp, long length) |
0f113f3e MC |
300 | { |
301 | EVP_PKEY *pkey; | |
302 | EC_KEY *key; | |
303 | const unsigned char *q; | |
304 | q = *pp; | |
305 | pkey = d2i_PUBKEY(NULL, &q, length); | |
306 | if (!pkey) | |
26a7d938 | 307 | return NULL; |
0f113f3e MC |
308 | key = EVP_PKEY_get1_EC_KEY(pkey); |
309 | EVP_PKEY_free(pkey); | |
310 | if (!key) | |
26a7d938 | 311 | return NULL; |
0f113f3e MC |
312 | *pp = q; |
313 | if (a) { | |
314 | EC_KEY_free(*a); | |
315 | *a = key; | |
316 | } | |
26a7d938 | 317 | return key; |
0f113f3e | 318 | } |
4d94ae00 | 319 | |
14a7cfb3 | 320 | int i2d_EC_PUBKEY(EC_KEY *a, unsigned char **pp) |
0f113f3e MC |
321 | { |
322 | EVP_PKEY *pktmp; | |
323 | int ret; | |
324 | if (!a) | |
26a7d938 | 325 | return 0; |
0f113f3e MC |
326 | if ((pktmp = EVP_PKEY_new()) == NULL) { |
327 | ASN1err(ASN1_F_I2D_EC_PUBKEY, ERR_R_MALLOC_FAILURE); | |
157997f0 | 328 | return -1; |
0f113f3e MC |
329 | } |
330 | EVP_PKEY_set1_EC_KEY(pktmp, a); | |
331 | ret = i2d_PUBKEY(pktmp, pp); | |
332 | EVP_PKEY_free(pktmp); | |
26a7d938 | 333 | return ret; |
0f113f3e | 334 | } |
12aefe78 | 335 | #endif |
448be743 DSH |
336 | |
337 | int X509_PUBKEY_set0_param(X509_PUBKEY *pub, ASN1_OBJECT *aobj, | |
0f113f3e MC |
338 | int ptype, void *pval, |
339 | unsigned char *penc, int penclen) | |
340 | { | |
341 | if (!X509_ALGOR_set0(pub->algor, aobj, ptype, pval)) | |
342 | return 0; | |
343 | if (penc) { | |
b548a1f1 | 344 | OPENSSL_free(pub->public_key->data); |
0f113f3e MC |
345 | pub->public_key->data = penc; |
346 | pub->public_key->length = penclen; | |
347 | /* Set number of unused bits to zero */ | |
348 | pub->public_key->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
349 | pub->public_key->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
350 | } | |
351 | return 1; | |
352 | } | |
448be743 DSH |
353 | |
354 | int X509_PUBKEY_get0_param(ASN1_OBJECT **ppkalg, | |
0f113f3e MC |
355 | const unsigned char **pk, int *ppklen, |
356 | X509_ALGOR **pa, X509_PUBKEY *pub) | |
357 | { | |
358 | if (ppkalg) | |
359 | *ppkalg = pub->algor->algorithm; | |
360 | if (pk) { | |
361 | *pk = pub->public_key->data; | |
362 | *ppklen = pub->public_key->length; | |
363 | } | |
364 | if (pa) | |
365 | *pa = pub->algor; | |
366 | return 1; | |
367 | } | |
29fa0a1a DSH |
368 | |
369 | ASN1_BIT_STRING *X509_get0_pubkey_bitstr(const X509 *x) | |
370 | { | |
371 | if (x == NULL) | |
372 | return NULL; | |
373 | return x->cert_info.key->public_key; | |
374 | } |