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Commit | Line | Data |
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b1322259 | 1 | /* |
33388b44 | 2 | * Copyright 1995-2020 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 | ||
7674e923 | 33 | static int x509_pubkey_decode(EVP_PKEY **pk, const X509_PUBKEY *key); |
fa0a9d71 | 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 | } | |
3c6ed955 | 94 | } else if (pkey->keymgmt != NULL) { |
e56ba0e1 | 95 | BIO *bmem = BIO_new(BIO_s_mem()); |
4b1aa164 | 96 | const char *serprop = OSSL_SERIALIZER_PUBKEY_TO_DER_PQ; |
e56ba0e1 RL |
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 | |
7674e923 | 154 | static int x509_pubkey_decode(EVP_PKEY **ppkey, const 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 | ||
7674e923 | 191 | EVP_PKEY *X509_PUBKEY_get0(const X509_PUBKEY *key) |
fa0a9d71 DSH |
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 | ||
7674e923 | 219 | EVP_PKEY *X509_PUBKEY_get(const X509_PUBKEY *key) |
c01ff880 DSH |
220 | { |
221 | EVP_PKEY *ret = X509_PUBKEY_get0(key); | |
e9e7b5df BE |
222 | |
223 | if (ret != NULL && !EVP_PKEY_up_ref(ret)) { | |
224 | X509err(X509_F_X509_PUBKEY_GET, ERR_R_INTERNAL_ERROR); | |
225 | ret = NULL; | |
226 | } | |
c01ff880 DSH |
227 | return ret; |
228 | } | |
229 | ||
0f113f3e MC |
230 | /* |
231 | * Now two pseudo ASN1 routines that take an EVP_PKEY structure and encode or | |
232 | * decode as X509_PUBKEY | |
52664f50 DSH |
233 | */ |
234 | ||
0f113f3e MC |
235 | EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp, long length) |
236 | { | |
237 | X509_PUBKEY *xpk; | |
238 | EVP_PKEY *pktmp; | |
a46c9789 | 239 | const unsigned char *q; |
12a765a5 | 240 | |
a46c9789 KR |
241 | q = *pp; |
242 | xpk = d2i_X509_PUBKEY(NULL, &q, length); | |
12a765a5 | 243 | if (xpk == NULL) |
0f113f3e MC |
244 | return NULL; |
245 | pktmp = X509_PUBKEY_get(xpk); | |
246 | X509_PUBKEY_free(xpk); | |
12a765a5 | 247 | if (pktmp == NULL) |
0f113f3e | 248 | return NULL; |
a46c9789 | 249 | *pp = q; |
12a765a5 | 250 | if (a != NULL) { |
0f113f3e MC |
251 | EVP_PKEY_free(*a); |
252 | *a = pktmp; | |
253 | } | |
254 | return pktmp; | |
255 | } | |
52664f50 | 256 | |
9fdcc21f | 257 | int i2d_PUBKEY(const EVP_PKEY *a, unsigned char **pp) |
0f113f3e | 258 | { |
9fdcc21f DO |
259 | int ret = -1; |
260 | ||
261 | if (a == NULL) | |
0f113f3e | 262 | return 0; |
cdb16632 RL |
263 | if (a->ameth != NULL) { |
264 | X509_PUBKEY *xpk = NULL; | |
265 | ||
266 | if ((xpk = X509_PUBKEY_new()) == NULL) | |
267 | return -1; | |
268 | ||
269 | /* pub_encode() only encode parameters, not the key itself */ | |
270 | if (a->ameth->pub_encode != NULL && a->ameth->pub_encode(xpk, a)) { | |
271 | xpk->pkey = (EVP_PKEY *)a; | |
272 | ret = i2d_X509_PUBKEY(xpk, pp); | |
273 | xpk->pkey = NULL; | |
274 | } | |
275 | X509_PUBKEY_free(xpk); | |
3c6ed955 | 276 | } else if (a->keymgmt != NULL) { |
cdb16632 RL |
277 | const char *serprop = OSSL_SERIALIZER_PUBKEY_TO_DER_PQ; |
278 | OSSL_SERIALIZER_CTX *ctx = | |
279 | OSSL_SERIALIZER_CTX_new_by_EVP_PKEY(a, serprop); | |
280 | BIO *out = BIO_new(BIO_s_mem()); | |
281 | BUF_MEM *buf = NULL; | |
282 | ||
283 | if (ctx != NULL | |
284 | && out != NULL | |
285 | && OSSL_SERIALIZER_CTX_get_serializer(ctx) != NULL | |
286 | && OSSL_SERIALIZER_to_bio(ctx, out) | |
287 | && BIO_get_mem_ptr(out, &buf) > 0) { | |
288 | ret = buf->length; | |
289 | ||
290 | if (pp != NULL) { | |
291 | if (*pp == NULL) { | |
292 | *pp = (unsigned char *)buf->data; | |
293 | buf->length = 0; | |
294 | buf->data = NULL; | |
295 | } else { | |
296 | memcpy(*pp, buf->data, ret); | |
297 | *pp += ret; | |
298 | } | |
299 | } | |
300 | } | |
301 | BIO_free(out); | |
302 | OSSL_SERIALIZER_CTX_free(ctx); | |
303 | } | |
304 | ||
0f113f3e MC |
305 | return ret; |
306 | } | |
307 | ||
308 | /* | |
309 | * The following are equivalents but which return RSA and DSA keys | |
52664f50 | 310 | */ |
cf1b7d96 | 311 | #ifndef OPENSSL_NO_RSA |
0f113f3e MC |
312 | RSA *d2i_RSA_PUBKEY(RSA **a, const unsigned char **pp, long length) |
313 | { | |
314 | EVP_PKEY *pkey; | |
315 | RSA *key; | |
316 | const unsigned char *q; | |
12a765a5 | 317 | |
0f113f3e MC |
318 | q = *pp; |
319 | pkey = d2i_PUBKEY(NULL, &q, length); | |
12a765a5 | 320 | if (pkey == NULL) |
0f113f3e MC |
321 | return NULL; |
322 | key = EVP_PKEY_get1_RSA(pkey); | |
323 | EVP_PKEY_free(pkey); | |
12a765a5 | 324 | if (key == NULL) |
0f113f3e MC |
325 | return NULL; |
326 | *pp = q; | |
12a765a5 | 327 | if (a != NULL) { |
0f113f3e MC |
328 | RSA_free(*a); |
329 | *a = key; | |
330 | } | |
331 | return key; | |
332 | } | |
52664f50 | 333 | |
9fdcc21f | 334 | int i2d_RSA_PUBKEY(const RSA *a, unsigned char **pp) |
0f113f3e MC |
335 | { |
336 | EVP_PKEY *pktmp; | |
337 | int ret; | |
338 | if (!a) | |
339 | return 0; | |
340 | pktmp = EVP_PKEY_new(); | |
90945fa3 | 341 | if (pktmp == NULL) { |
0f113f3e | 342 | ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE); |
157997f0 | 343 | return -1; |
0f113f3e | 344 | } |
9fdcc21f | 345 | (void)EVP_PKEY_assign_RSA(pktmp, (RSA *)a); |
0f113f3e | 346 | ret = i2d_PUBKEY(pktmp, pp); |
9fdcc21f | 347 | pktmp->pkey.ptr = NULL; |
0f113f3e MC |
348 | EVP_PKEY_free(pktmp); |
349 | return ret; | |
350 | } | |
12aefe78 | 351 | #endif |
52664f50 | 352 | |
cf1b7d96 | 353 | #ifndef OPENSSL_NO_DSA |
0f113f3e MC |
354 | DSA *d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp, long length) |
355 | { | |
356 | EVP_PKEY *pkey; | |
357 | DSA *key; | |
358 | const unsigned char *q; | |
12a765a5 | 359 | |
0f113f3e MC |
360 | q = *pp; |
361 | pkey = d2i_PUBKEY(NULL, &q, length); | |
12a765a5 | 362 | if (pkey == NULL) |
0f113f3e MC |
363 | return NULL; |
364 | key = EVP_PKEY_get1_DSA(pkey); | |
365 | EVP_PKEY_free(pkey); | |
12a765a5 | 366 | if (key == NULL) |
0f113f3e MC |
367 | return NULL; |
368 | *pp = q; | |
12a765a5 | 369 | if (a != NULL) { |
0f113f3e MC |
370 | DSA_free(*a); |
371 | *a = key; | |
372 | } | |
373 | return key; | |
374 | } | |
52664f50 | 375 | |
9fdcc21f | 376 | int i2d_DSA_PUBKEY(const DSA *a, unsigned char **pp) |
0f113f3e MC |
377 | { |
378 | EVP_PKEY *pktmp; | |
379 | int ret; | |
380 | if (!a) | |
381 | return 0; | |
382 | pktmp = EVP_PKEY_new(); | |
90945fa3 | 383 | if (pktmp == NULL) { |
0f113f3e | 384 | ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE); |
157997f0 | 385 | return -1; |
0f113f3e | 386 | } |
9fdcc21f | 387 | (void)EVP_PKEY_assign_DSA(pktmp, (DSA *)a); |
0f113f3e | 388 | ret = i2d_PUBKEY(pktmp, pp); |
9fdcc21f | 389 | pktmp->pkey.ptr = NULL; |
0f113f3e MC |
390 | EVP_PKEY_free(pktmp); |
391 | return ret; | |
392 | } | |
4d94ae00 BM |
393 | #endif |
394 | ||
14a7cfb3 | 395 | #ifndef OPENSSL_NO_EC |
6343829a | 396 | EC_KEY *d2i_EC_PUBKEY(EC_KEY **a, const unsigned char **pp, long length) |
0f113f3e MC |
397 | { |
398 | EVP_PKEY *pkey; | |
399 | EC_KEY *key; | |
400 | const unsigned char *q; | |
12a765a5 | 401 | |
0f113f3e MC |
402 | q = *pp; |
403 | pkey = d2i_PUBKEY(NULL, &q, length); | |
12a765a5 | 404 | if (pkey == NULL) |
26a7d938 | 405 | return NULL; |
0f113f3e MC |
406 | key = EVP_PKEY_get1_EC_KEY(pkey); |
407 | EVP_PKEY_free(pkey); | |
12a765a5 | 408 | if (key == NULL) |
26a7d938 | 409 | return NULL; |
0f113f3e | 410 | *pp = q; |
12a765a5 | 411 | if (a != NULL) { |
0f113f3e MC |
412 | EC_KEY_free(*a); |
413 | *a = key; | |
414 | } | |
26a7d938 | 415 | return key; |
0f113f3e | 416 | } |
4d94ae00 | 417 | |
9fdcc21f | 418 | int i2d_EC_PUBKEY(const EC_KEY *a, unsigned char **pp) |
0f113f3e MC |
419 | { |
420 | EVP_PKEY *pktmp; | |
421 | int ret; | |
12a765a5 RS |
422 | |
423 | if (a == NULL) | |
26a7d938 | 424 | return 0; |
0f113f3e MC |
425 | if ((pktmp = EVP_PKEY_new()) == NULL) { |
426 | ASN1err(ASN1_F_I2D_EC_PUBKEY, ERR_R_MALLOC_FAILURE); | |
157997f0 | 427 | return -1; |
0f113f3e | 428 | } |
9fdcc21f | 429 | (void)EVP_PKEY_assign_EC_KEY(pktmp, (EC_KEY *)a); |
0f113f3e | 430 | ret = i2d_PUBKEY(pktmp, pp); |
9fdcc21f | 431 | pktmp->pkey.ptr = NULL; |
0f113f3e | 432 | EVP_PKEY_free(pktmp); |
26a7d938 | 433 | return ret; |
0f113f3e | 434 | } |
12aefe78 | 435 | #endif |
448be743 DSH |
436 | |
437 | int X509_PUBKEY_set0_param(X509_PUBKEY *pub, ASN1_OBJECT *aobj, | |
0f113f3e MC |
438 | int ptype, void *pval, |
439 | unsigned char *penc, int penclen) | |
440 | { | |
441 | if (!X509_ALGOR_set0(pub->algor, aobj, ptype, pval)) | |
442 | return 0; | |
443 | if (penc) { | |
b548a1f1 | 444 | OPENSSL_free(pub->public_key->data); |
0f113f3e MC |
445 | pub->public_key->data = penc; |
446 | pub->public_key->length = penclen; | |
447 | /* Set number of unused bits to zero */ | |
448 | pub->public_key->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
449 | pub->public_key->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
450 | } | |
451 | return 1; | |
452 | } | |
448be743 DSH |
453 | |
454 | int X509_PUBKEY_get0_param(ASN1_OBJECT **ppkalg, | |
0f113f3e | 455 | const unsigned char **pk, int *ppklen, |
7674e923 | 456 | X509_ALGOR **pa, const X509_PUBKEY *pub) |
0f113f3e MC |
457 | { |
458 | if (ppkalg) | |
459 | *ppkalg = pub->algor->algorithm; | |
460 | if (pk) { | |
461 | *pk = pub->public_key->data; | |
462 | *ppklen = pub->public_key->length; | |
463 | } | |
464 | if (pa) | |
465 | *pa = pub->algor; | |
466 | return 1; | |
467 | } | |
29fa0a1a DSH |
468 | |
469 | ASN1_BIT_STRING *X509_get0_pubkey_bitstr(const X509 *x) | |
470 | { | |
471 | if (x == NULL) | |
472 | return NULL; | |
473 | return x->cert_info.key->public_key; | |
474 | } |