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Commit | Line | Data |
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db137867 | 1 | /* |
fe037171 | 2 | * librb: a library used by ircd-ratbox and other things |
db137867 AC |
3 | * openssl.c: openssl related code |
4 | * | |
5 | * Copyright (C) 2007-2008 ircd-ratbox development team | |
6 | * Copyright (C) 2007-2008 Aaron Sethman <androsyn@ratbox.org> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
55abcbb2 | 17 | * |
db137867 AC |
18 | * You should have received a copy of the GNU General Public License |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 | |
21 | * USA | |
22 | * | |
db137867 AC |
23 | */ |
24 | ||
fe037171 EM |
25 | #include <librb_config.h> |
26 | #include <rb_lib.h> | |
db137867 AC |
27 | |
28 | #ifdef HAVE_OPENSSL | |
29 | ||
30 | #include <commio-int.h> | |
31 | #include <commio-ssl.h> | |
32 | #include <openssl/ssl.h> | |
33 | #include <openssl/dh.h> | |
34 | #include <openssl/err.h> | |
d3806d05 | 35 | #include <openssl/evp.h> |
db137867 | 36 | #include <openssl/rand.h> |
3ae24413 AJ |
37 | #include <openssl/opensslv.h> |
38 | ||
39 | /* | |
40 | * This is a mess but what can you do when the library authors | |
41 | * refuse to play ball with established conventions? | |
42 | */ | |
43 | #if defined(LIBRESSL_VERSION_NUMBER) && (LIBRESSL_VERSION_NUMBER >= 0x20020002L) | |
44 | # define LRB_HAVE_TLS_METHOD_API 1 | |
45 | #else | |
46 | # if !defined(LIBRESSL_VERSION_NUMBER) && (OPENSSL_VERSION_NUMBER >= 0x10100000L) | |
47 | # define LRB_HAVE_TLS_METHOD_API 1 | |
48 | # endif | |
49 | #endif | |
db137867 | 50 | |
b1f05493 AJ |
51 | /* |
52 | * Use SSL_CTX_set_ecdh_auto() in OpenSSL 1.0.2 only | |
53 | * Use SSL_CTX_set1_curves_list() in OpenSSL 1.0.2 and above | |
54 | * TODO: Merge this into the block above if LibreSSL implements them | |
55 | */ | |
56 | #if !defined(LIBRESSL_VERSION_NUMBER) && (OPENSSL_VERSION_NUMBER >= 0x10002000L) | |
57 | # define LRB_HAVE_TLS_SET_CURVES 1 | |
58 | # if (OPENSSL_VERSION_NUMBER < 0x10100000L) | |
59 | # define LRB_HAVE_TLS_ECDH_AUTO 1 | |
60 | # endif | |
61 | #endif | |
62 | ||
cf12678b AJ |
63 | static SSL_CTX *ssl_server_ctx = NULL; |
64 | static SSL_CTX *ssl_client_ctx = NULL; | |
fe037171 | 65 | static int librb_index = -1; |
db137867 | 66 | |
3202e249 VY |
67 | static unsigned long |
68 | get_last_err(void) | |
db137867 AC |
69 | { |
70 | unsigned long t_err, err = 0; | |
71 | err = ERR_get_error(); | |
72 | if(err == 0) | |
73 | return 0; | |
3202e249 | 74 | |
db137867 AC |
75 | while((t_err = ERR_get_error()) > 0) |
76 | err = t_err; | |
77 | ||
78 | return err; | |
79 | } | |
80 | ||
81 | void | |
3202e249 | 82 | rb_ssl_shutdown(rb_fde_t *F) |
db137867 AC |
83 | { |
84 | int i; | |
85 | if(F == NULL || F->ssl == NULL) | |
86 | return; | |
87 | SSL_set_shutdown((SSL *) F->ssl, SSL_RECEIVED_SHUTDOWN); | |
88 | ||
3202e249 | 89 | for(i = 0; i < 4; i++) |
db137867 AC |
90 | { |
91 | if(SSL_shutdown((SSL *) F->ssl)) | |
92 | break; | |
93 | } | |
94 | get_last_err(); | |
95 | SSL_free((SSL *) F->ssl); | |
96 | } | |
97 | ||
c2ac22cc VY |
98 | unsigned int |
99 | rb_ssl_handshake_count(rb_fde_t *F) | |
100 | { | |
101 | return F->handshake_count; | |
102 | } | |
103 | ||
104 | void | |
105 | rb_ssl_clear_handshake_count(rb_fde_t *F) | |
106 | { | |
107 | F->handshake_count = 0; | |
108 | } | |
109 | ||
db137867 | 110 | static void |
3202e249 | 111 | rb_ssl_timeout(rb_fde_t *F, void *notused) |
db137867 | 112 | { |
73d6283c VY |
113 | lrb_assert(F->accept != NULL); |
114 | F->accept->callback(F, RB_ERR_TIMEOUT, NULL, 0, F->accept->data); | |
db137867 AC |
115 | } |
116 | ||
117 | ||
3202e249 VY |
118 | static void |
119 | rb_ssl_info_callback(SSL * ssl, int where, int ret) | |
c2ac22cc VY |
120 | { |
121 | if(where & SSL_CB_HANDSHAKE_START) | |
122 | { | |
fe037171 | 123 | rb_fde_t *F = SSL_get_ex_data(ssl, librb_index); |
c2ac22cc VY |
124 | if(F == NULL) |
125 | return; | |
126 | F->handshake_count++; | |
3202e249 | 127 | } |
c2ac22cc VY |
128 | } |
129 | ||
130 | static void | |
131 | rb_setup_ssl_cb(rb_fde_t *F) | |
132 | { | |
fe037171 | 133 | SSL_set_ex_data(F->ssl, librb_index, (char *)F); |
3202e249 | 134 | SSL_set_info_callback((SSL *) F->ssl, (void (*)(const SSL *,int,int))rb_ssl_info_callback); |
c2ac22cc VY |
135 | } |
136 | ||
db137867 | 137 | static void |
3202e249 | 138 | rb_ssl_tryaccept(rb_fde_t *F, void *data) |
db137867 AC |
139 | { |
140 | int ssl_err; | |
141 | lrb_assert(F->accept != NULL); | |
73d6283c | 142 | int flags; |
2142f691 | 143 | struct acceptdata *ad; |
db137867 AC |
144 | |
145 | if(!SSL_is_init_finished((SSL *) F->ssl)) | |
146 | { | |
147 | if((ssl_err = SSL_accept((SSL *) F->ssl)) <= 0) | |
148 | { | |
149 | switch (ssl_err = SSL_get_error((SSL *) F->ssl, ssl_err)) | |
150 | { | |
db137867 AC |
151 | case SSL_ERROR_WANT_READ: |
152 | case SSL_ERROR_WANT_WRITE: | |
73d6283c VY |
153 | if(ssl_err == SSL_ERROR_WANT_WRITE) |
154 | flags = RB_SELECT_WRITE; | |
155 | else | |
156 | flags = RB_SELECT_READ; | |
157 | F->ssl_errno = get_last_err(); | |
158 | rb_setselect(F, flags, rb_ssl_tryaccept, NULL); | |
159 | break; | |
160 | case SSL_ERROR_SYSCALL: | |
161 | F->accept->callback(F, RB_ERROR, NULL, 0, F->accept->data); | |
162 | break; | |
db137867 AC |
163 | default: |
164 | F->ssl_errno = get_last_err(); | |
165 | F->accept->callback(F, RB_ERROR_SSL, NULL, 0, F->accept->data); | |
166 | break; | |
167 | } | |
168 | return; | |
169 | } | |
170 | } | |
171 | rb_settimeout(F, 0, NULL, NULL); | |
172 | rb_setselect(F, RB_SELECT_READ | RB_SELECT_WRITE, NULL, NULL); | |
3202e249 | 173 | |
2142f691 | 174 | ad = F->accept; |
db137867 | 175 | F->accept = NULL; |
3202e249 | 176 | ad->callback(F, RB_OK, (struct sockaddr *)&ad->S, ad->addrlen, ad->data); |
2142f691 | 177 | rb_free(ad); |
db137867 AC |
178 | |
179 | } | |
180 | ||
c2ac22cc VY |
181 | |
182 | static void | |
183 | rb_ssl_accept_common(rb_fde_t *new_F) | |
db137867 AC |
184 | { |
185 | int ssl_err; | |
db137867 AC |
186 | if((ssl_err = SSL_accept((SSL *) new_F->ssl)) <= 0) |
187 | { | |
188 | switch (ssl_err = SSL_get_error((SSL *) new_F->ssl, ssl_err)) | |
189 | { | |
190 | case SSL_ERROR_SYSCALL: | |
191 | if(rb_ignore_errno(errno)) | |
192 | case SSL_ERROR_WANT_READ: | |
193 | case SSL_ERROR_WANT_WRITE: | |
194 | { | |
195 | new_F->ssl_errno = get_last_err(); | |
196 | rb_setselect(new_F, RB_SELECT_READ | RB_SELECT_WRITE, | |
197 | rb_ssl_tryaccept, NULL); | |
198 | return; | |
199 | } | |
200 | default: | |
201 | new_F->ssl_errno = get_last_err(); | |
202 | new_F->accept->callback(new_F, RB_ERROR_SSL, NULL, 0, new_F->accept->data); | |
203 | return; | |
204 | } | |
205 | } | |
206 | else | |
207 | { | |
208 | rb_ssl_tryaccept(new_F, NULL); | |
209 | } | |
210 | } | |
211 | ||
c2ac22cc | 212 | void |
3202e249 | 213 | rb_ssl_start_accepted(rb_fde_t *new_F, ACCB * cb, void *data, int timeout) |
c2ac22cc VY |
214 | { |
215 | new_F->type |= RB_FD_SSL; | |
216 | new_F->ssl = SSL_new(ssl_server_ctx); | |
217 | new_F->accept = rb_malloc(sizeof(struct acceptdata)); | |
218 | ||
219 | new_F->accept->callback = cb; | |
220 | new_F->accept->data = data; | |
221 | rb_settimeout(new_F, timeout, rb_ssl_timeout, NULL); | |
222 | ||
223 | new_F->accept->addrlen = 0; | |
224 | SSL_set_fd((SSL *) new_F->ssl, rb_get_fd(new_F)); | |
225 | rb_setup_ssl_cb(new_F); | |
226 | rb_ssl_accept_common(new_F); | |
227 | } | |
228 | ||
db137867 AC |
229 | |
230 | ||
231 | ||
232 | void | |
3202e249 | 233 | rb_ssl_accept_setup(rb_fde_t *F, rb_fde_t *new_F, struct sockaddr *st, int addrlen) |
db137867 | 234 | { |
db137867 AC |
235 | new_F->type |= RB_FD_SSL; |
236 | new_F->ssl = SSL_new(ssl_server_ctx); | |
237 | new_F->accept = rb_malloc(sizeof(struct acceptdata)); | |
238 | ||
239 | new_F->accept->callback = F->accept->callback; | |
240 | new_F->accept->data = F->accept->data; | |
241 | rb_settimeout(new_F, 10, rb_ssl_timeout, NULL); | |
242 | memcpy(&new_F->accept->S, st, addrlen); | |
243 | new_F->accept->addrlen = addrlen; | |
244 | ||
a9fb3ed0 | 245 | SSL_set_fd((SSL *) new_F->ssl, rb_get_fd(new_F)); |
c2ac22cc VY |
246 | rb_setup_ssl_cb(new_F); |
247 | rb_ssl_accept_common(new_F); | |
db137867 AC |
248 | } |
249 | ||
250 | static ssize_t | |
3202e249 | 251 | rb_ssl_read_or_write(int r_or_w, rb_fde_t *F, void *rbuf, const void *wbuf, size_t count) |
db137867 AC |
252 | { |
253 | ssize_t ret; | |
254 | unsigned long err; | |
255 | SSL *ssl = F->ssl; | |
256 | ||
257 | if(r_or_w == 0) | |
3202e249 | 258 | ret = (ssize_t) SSL_read(ssl, rbuf, (int)count); |
db137867 | 259 | else |
3202e249 | 260 | ret = (ssize_t) SSL_write(ssl, wbuf, (int)count); |
db137867 AC |
261 | |
262 | if(ret < 0) | |
263 | { | |
264 | switch (SSL_get_error(ssl, ret)) | |
265 | { | |
266 | case SSL_ERROR_WANT_READ: | |
267 | errno = EAGAIN; | |
268 | return RB_RW_SSL_NEED_READ; | |
269 | case SSL_ERROR_WANT_WRITE: | |
270 | errno = EAGAIN; | |
271 | return RB_RW_SSL_NEED_WRITE; | |
272 | case SSL_ERROR_ZERO_RETURN: | |
273 | return 0; | |
274 | case SSL_ERROR_SYSCALL: | |
275 | err = get_last_err(); | |
276 | if(err == 0) | |
277 | { | |
278 | F->ssl_errno = 0; | |
279 | return RB_RW_IO_ERROR; | |
280 | } | |
281 | break; | |
282 | default: | |
283 | err = get_last_err(); | |
284 | break; | |
285 | } | |
286 | F->ssl_errno = err; | |
287 | if(err > 0) | |
288 | { | |
289 | errno = EIO; /* not great but... */ | |
290 | return RB_RW_SSL_ERROR; | |
291 | } | |
292 | return RB_RW_IO_ERROR; | |
293 | } | |
294 | return ret; | |
295 | } | |
296 | ||
297 | ssize_t | |
3202e249 | 298 | rb_ssl_read(rb_fde_t *F, void *buf, size_t count) |
db137867 AC |
299 | { |
300 | return rb_ssl_read_or_write(0, F, buf, NULL, count); | |
301 | } | |
302 | ||
303 | ssize_t | |
3202e249 | 304 | rb_ssl_write(rb_fde_t *F, const void *buf, size_t count) |
db137867 AC |
305 | { |
306 | return rb_ssl_read_or_write(1, F, NULL, buf, count); | |
307 | } | |
308 | ||
7247337a JT |
309 | static int |
310 | verify_accept_all_cb(int preverify_ok, X509_STORE_CTX *x509_ctx) | |
311 | { | |
312 | return 1; | |
313 | } | |
314 | ||
918d73d5 JT |
315 | static const char * |
316 | get_ssl_error(unsigned long err) | |
317 | { | |
318 | static char buf[512]; | |
319 | ||
320 | ERR_error_string_n(err, buf, sizeof buf); | |
321 | return buf; | |
322 | } | |
323 | ||
db137867 AC |
324 | int |
325 | rb_init_ssl(void) | |
326 | { | |
fe037171 | 327 | char librb_data[] = "librb data"; |
cf12678b AJ |
328 | |
329 | #if (OPENSSL_VERSION_NUMBER < 0x10100000L) | |
330 | /* | |
331 | * OpenSSL 1.1.0 and above automatically initialises itself with sane defaults | |
332 | */ | |
db137867 | 333 | SSL_library_init(); |
cf12678b AJ |
334 | SSL_load_error_strings(); |
335 | #endif | |
336 | ||
fe037171 | 337 | librb_index = SSL_get_ex_new_index(0, librb_data, NULL, NULL, NULL); |
a4c8c827 | 338 | |
cf12678b AJ |
339 | return 1; |
340 | } | |
341 | ||
342 | int | |
343 | rb_setup_ssl_server(const char *cert, const char *keyfile, const char *dhfile, const char *cipher_list) | |
344 | { | |
345 | const char librb_ciphers[] = "kEECDH+HIGH:kEDH+HIGH:HIGH:!aNULL"; | |
346 | ||
347 | #ifdef LRB_HAVE_TLS_SET_CURVES | |
348 | const char librb_curves[] = "P-521:P-384:P-256"; | |
349 | #endif | |
350 | ||
351 | if(cert == NULL) | |
352 | { | |
353 | rb_lib_log("rb_setup_ssl_server: No certificate file"); | |
354 | return 0; | |
355 | } | |
356 | ||
357 | if(keyfile == NULL) | |
358 | { | |
359 | rb_lib_log("rb_setup_ssl_server: No key file"); | |
360 | return 0; | |
361 | } | |
362 | ||
92404a1a AJ |
363 | if(cipher_list == NULL) |
364 | cipher_list = librb_ciphers; | |
365 | ||
cf12678b AJ |
366 | if (ssl_server_ctx) |
367 | SSL_CTX_free(ssl_server_ctx); | |
368 | ||
369 | if (ssl_client_ctx) | |
370 | SSL_CTX_free(ssl_client_ctx); | |
371 | ||
372 | #ifdef LRB_HAVE_TLS_METHOD_API | |
a4c8c827 | 373 | ssl_server_ctx = SSL_CTX_new(TLS_server_method()); |
92404a1a | 374 | ssl_client_ctx = SSL_CTX_new(TLS_client_method()); |
cf12678b AJ |
375 | #else |
376 | ssl_server_ctx = SSL_CTX_new(SSLv23_server_method()); | |
92404a1a | 377 | ssl_client_ctx = SSL_CTX_new(SSLv23_client_method()); |
cf12678b | 378 | #endif |
a4c8c827 | 379 | |
db137867 AC |
380 | if(ssl_server_ctx == NULL) |
381 | { | |
382 | rb_lib_log("rb_init_openssl: Unable to initialize OpenSSL server context: %s", | |
918d73d5 | 383 | get_ssl_error(ERR_get_error())); |
92404a1a | 384 | return 0; |
db137867 | 385 | } |
a4c8c827 | 386 | |
92404a1a AJ |
387 | if(ssl_client_ctx == NULL) |
388 | { | |
389 | rb_lib_log("rb_init_openssl: Unable to initialize OpenSSL client context: %s", | |
390 | get_ssl_error(ERR_get_error())); | |
391 | return 0; | |
392 | } | |
a4c8c827 | 393 | |
92404a1a AJ |
394 | #ifndef LRB_HAVE_TLS_METHOD_API |
395 | SSL_CTX_set_options(ssl_server_ctx, SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3); | |
396 | SSL_CTX_set_options(ssl_client_ctx, SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3); | |
397 | #endif | |
a4c8c827 | 398 | |
92404a1a AJ |
399 | #ifdef SSL_OP_SINGLE_DH_USE |
400 | SSL_CTX_set_options(ssl_server_ctx, SSL_OP_SINGLE_DH_USE); | |
401 | #endif | |
a4c8c827 | 402 | |
92404a1a AJ |
403 | #ifdef SSL_OP_SINGLE_ECDH_USE |
404 | SSL_CTX_set_options(ssl_server_ctx, SSL_OP_SINGLE_ECDH_USE); | |
405 | #endif | |
b6e799f5 | 406 | |
92404a1a AJ |
407 | #ifdef SSL_OP_NO_TICKET |
408 | SSL_CTX_set_options(ssl_server_ctx, SSL_OP_NO_TICKET); | |
409 | SSL_CTX_set_options(ssl_client_ctx, SSL_OP_NO_TICKET); | |
410 | #endif | |
b1f05493 | 411 | |
92404a1a AJ |
412 | #ifdef SSL_OP_CIPHER_SERVER_PREFERENCE |
413 | SSL_CTX_set_options(ssl_server_ctx, SSL_OP_CIPHER_SERVER_PREFERENCE); | |
414 | #endif | |
b1f05493 | 415 | |
92404a1a AJ |
416 | SSL_CTX_set_verify(ssl_server_ctx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, verify_accept_all_cb); |
417 | SSL_CTX_set_session_cache_mode(ssl_server_ctx, SSL_SESS_CACHE_OFF); | |
cf12678b | 418 | |
92404a1a AJ |
419 | #ifdef LRB_HAVE_TLS_SET_CURVES |
420 | SSL_CTX_set1_curves_list(ssl_server_ctx, librb_curves); | |
cf12678b | 421 | #endif |
db137867 | 422 | |
92404a1a AJ |
423 | #ifdef LRB_HAVE_TLS_ECDH_AUTO |
424 | SSL_CTX_set_ecdh_auto(ssl_server_ctx, 1); | |
425 | #endif | |
6b6a5799 | 426 | |
92404a1a AJ |
427 | /* |
428 | * Set manual ECDHE curve on OpenSSL 1.0.0 & 1.0.1, but make sure it's actually available | |
429 | */ | |
430 | #if (OPENSSL_VERSION_NUMBER >= 0x10000000L) && (OPENSSL_VERSION_NUMBER < 0x10002000L) && !defined(OPENSSL_NO_ECDH) | |
431 | EC_KEY *key = EC_KEY_new_by_curve_name(NID_secp384r1); | |
432 | if (key) { | |
433 | SSL_CTX_set_tmp_ecdh(ssl_server_ctx, key); | |
434 | EC_KEY_free(key); | |
cf12678b | 435 | } |
92404a1a | 436 | #endif |
db137867 | 437 | |
cf12678b AJ |
438 | SSL_CTX_set_cipher_list(ssl_server_ctx, cipher_list); |
439 | SSL_CTX_set_cipher_list(ssl_client_ctx, cipher_list); | |
db137867 | 440 | |
07e14084 | 441 | if(!SSL_CTX_use_certificate_chain_file(ssl_server_ctx, cert) || !SSL_CTX_use_certificate_chain_file(ssl_client_ctx, cert)) |
db137867 | 442 | { |
db137867 | 443 | rb_lib_log("rb_setup_ssl_server: Error loading certificate file [%s]: %s", cert, |
cf12678b | 444 | get_ssl_error(ERR_get_error())); |
db137867 AC |
445 | return 0; |
446 | } | |
447 | ||
07e14084 | 448 | if(!SSL_CTX_use_PrivateKey_file(ssl_server_ctx, keyfile, SSL_FILETYPE_PEM) || !SSL_CTX_use_PrivateKey_file(ssl_client_ctx, keyfile, SSL_FILETYPE_PEM)) |
db137867 | 449 | { |
db137867 | 450 | rb_lib_log("rb_setup_ssl_server: Error loading keyfile [%s]: %s", keyfile, |
cf12678b | 451 | get_ssl_error(ERR_get_error())); |
db137867 AC |
452 | return 0; |
453 | } | |
454 | ||
455 | if(dhfile != NULL) | |
456 | { | |
457 | /* DH parameters aren't necessary, but they are nice..if they didn't pass one..that is their problem */ | |
3202e249 VY |
458 | BIO *bio = BIO_new_file(dhfile, "r"); |
459 | if(bio != NULL) | |
db137867 | 460 | { |
cf12678b | 461 | DH *dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL); |
db137867 AC |
462 | if(dh == NULL) |
463 | { | |
db137867 AC |
464 | rb_lib_log |
465 | ("rb_setup_ssl_server: Error loading DH params file [%s]: %s", | |
cf12678b | 466 | dhfile, get_ssl_error(ERR_get_error())); |
3202e249 | 467 | BIO_free(bio); |
db137867 AC |
468 | return 0; |
469 | } | |
3202e249 | 470 | BIO_free(bio); |
db137867 | 471 | SSL_CTX_set_tmp_dh(ssl_server_ctx, dh); |
cf12678b | 472 | DH_free(dh); |
3202e249 VY |
473 | } |
474 | else | |
475 | { | |
3202e249 | 476 | rb_lib_log("rb_setup_ssl_server: Error loading DH params file [%s]: %s", |
cf12678b | 477 | dhfile, get_ssl_error(ERR_get_error())); |
db137867 AC |
478 | } |
479 | } | |
c1725bda | 480 | |
db137867 AC |
481 | return 1; |
482 | } | |
483 | ||
484 | int | |
aa4737a0 | 485 | rb_ssl_listen(rb_fde_t *F, int backlog, int defer_accept) |
db137867 | 486 | { |
aa4737a0 AC |
487 | int result; |
488 | ||
489 | result = rb_listen(F, backlog, defer_accept); | |
db137867 | 490 | F->type = RB_FD_SOCKET | RB_FD_LISTEN | RB_FD_SSL; |
aa4737a0 AC |
491 | |
492 | return result; | |
db137867 AC |
493 | } |
494 | ||
495 | struct ssl_connect | |
496 | { | |
497 | CNCB *callback; | |
498 | void *data; | |
499 | int timeout; | |
500 | }; | |
501 | ||
502 | static void | |
3202e249 | 503 | rb_ssl_connect_realcb(rb_fde_t *F, int status, struct ssl_connect *sconn) |
db137867 AC |
504 | { |
505 | F->connect->callback = sconn->callback; | |
506 | F->connect->data = sconn->data; | |
507 | rb_free(sconn); | |
508 | rb_connect_callback(F, status); | |
509 | } | |
510 | ||
511 | static void | |
3202e249 | 512 | rb_ssl_tryconn_timeout_cb(rb_fde_t *F, void *data) |
db137867 AC |
513 | { |
514 | rb_ssl_connect_realcb(F, RB_ERR_TIMEOUT, data); | |
515 | } | |
516 | ||
517 | static void | |
3202e249 | 518 | rb_ssl_tryconn_cb(rb_fde_t *F, void *data) |
db137867 AC |
519 | { |
520 | struct ssl_connect *sconn = data; | |
521 | int ssl_err; | |
522 | if(!SSL_is_init_finished((SSL *) F->ssl)) | |
523 | { | |
524 | if((ssl_err = SSL_connect((SSL *) F->ssl)) <= 0) | |
525 | { | |
526 | switch (ssl_err = SSL_get_error((SSL *) F->ssl, ssl_err)) | |
527 | { | |
528 | case SSL_ERROR_SYSCALL: | |
529 | if(rb_ignore_errno(errno)) | |
530 | case SSL_ERROR_WANT_READ: | |
531 | case SSL_ERROR_WANT_WRITE: | |
532 | { | |
533 | F->ssl_errno = get_last_err(); | |
534 | rb_setselect(F, RB_SELECT_READ | RB_SELECT_WRITE, | |
535 | rb_ssl_tryconn_cb, sconn); | |
536 | return; | |
537 | } | |
538 | default: | |
539 | F->ssl_errno = get_last_err(); | |
540 | rb_ssl_connect_realcb(F, RB_ERROR_SSL, sconn); | |
541 | return; | |
542 | } | |
543 | } | |
544 | else | |
545 | { | |
546 | rb_ssl_connect_realcb(F, RB_OK, sconn); | |
547 | } | |
548 | } | |
549 | } | |
550 | ||
551 | static void | |
3202e249 | 552 | rb_ssl_tryconn(rb_fde_t *F, int status, void *data) |
db137867 AC |
553 | { |
554 | struct ssl_connect *sconn = data; | |
555 | int ssl_err; | |
556 | if(status != RB_OK) | |
557 | { | |
558 | rb_ssl_connect_realcb(F, status, sconn); | |
559 | return; | |
560 | } | |
561 | ||
562 | F->type |= RB_FD_SSL; | |
563 | F->ssl = SSL_new(ssl_client_ctx); | |
564 | SSL_set_fd((SSL *) F->ssl, F->fd); | |
c2ac22cc | 565 | rb_setup_ssl_cb(F); |
db137867 AC |
566 | rb_settimeout(F, sconn->timeout, rb_ssl_tryconn_timeout_cb, sconn); |
567 | if((ssl_err = SSL_connect((SSL *) F->ssl)) <= 0) | |
568 | { | |
569 | switch (ssl_err = SSL_get_error((SSL *) F->ssl, ssl_err)) | |
570 | { | |
571 | case SSL_ERROR_SYSCALL: | |
572 | if(rb_ignore_errno(errno)) | |
573 | case SSL_ERROR_WANT_READ: | |
574 | case SSL_ERROR_WANT_WRITE: | |
575 | { | |
576 | F->ssl_errno = get_last_err(); | |
577 | rb_setselect(F, RB_SELECT_READ | RB_SELECT_WRITE, | |
578 | rb_ssl_tryconn_cb, sconn); | |
579 | return; | |
580 | } | |
581 | default: | |
582 | F->ssl_errno = get_last_err(); | |
583 | rb_ssl_connect_realcb(F, RB_ERROR_SSL, sconn); | |
584 | return; | |
585 | } | |
586 | } | |
587 | else | |
588 | { | |
589 | rb_ssl_connect_realcb(F, RB_OK, sconn); | |
590 | } | |
591 | } | |
592 | ||
593 | void | |
3202e249 | 594 | rb_connect_tcp_ssl(rb_fde_t *F, struct sockaddr *dest, |
5ad62c80 | 595 | struct sockaddr *clocal, CNCB * callback, void *data, int timeout) |
db137867 AC |
596 | { |
597 | struct ssl_connect *sconn; | |
598 | if(F == NULL) | |
599 | return; | |
600 | ||
601 | sconn = rb_malloc(sizeof(struct ssl_connect)); | |
602 | sconn->data = data; | |
603 | sconn->callback = callback; | |
604 | sconn->timeout = timeout; | |
5ad62c80 | 605 | rb_connect_tcp(F, dest, clocal, rb_ssl_tryconn, sconn, timeout); |
db137867 AC |
606 | } |
607 | ||
608 | void | |
3202e249 | 609 | rb_ssl_start_connected(rb_fde_t *F, CNCB * callback, void *data, int timeout) |
db137867 AC |
610 | { |
611 | struct ssl_connect *sconn; | |
612 | int ssl_err; | |
613 | if(F == NULL) | |
614 | return; | |
615 | ||
616 | sconn = rb_malloc(sizeof(struct ssl_connect)); | |
617 | sconn->data = data; | |
618 | sconn->callback = callback; | |
619 | sconn->timeout = timeout; | |
620 | F->connect = rb_malloc(sizeof(struct conndata)); | |
621 | F->connect->callback = callback; | |
622 | F->connect->data = data; | |
623 | F->type |= RB_FD_SSL; | |
624 | F->ssl = SSL_new(ssl_client_ctx); | |
3202e249 | 625 | |
db137867 | 626 | SSL_set_fd((SSL *) F->ssl, F->fd); |
c2ac22cc | 627 | rb_setup_ssl_cb(F); |
db137867 AC |
628 | rb_settimeout(F, sconn->timeout, rb_ssl_tryconn_timeout_cb, sconn); |
629 | if((ssl_err = SSL_connect((SSL *) F->ssl)) <= 0) | |
630 | { | |
631 | switch (ssl_err = SSL_get_error((SSL *) F->ssl, ssl_err)) | |
632 | { | |
633 | case SSL_ERROR_SYSCALL: | |
634 | if(rb_ignore_errno(errno)) | |
635 | case SSL_ERROR_WANT_READ: | |
636 | case SSL_ERROR_WANT_WRITE: | |
637 | { | |
638 | F->ssl_errno = get_last_err(); | |
639 | rb_setselect(F, RB_SELECT_READ | RB_SELECT_WRITE, | |
640 | rb_ssl_tryconn_cb, sconn); | |
641 | return; | |
642 | } | |
643 | default: | |
644 | F->ssl_errno = get_last_err(); | |
645 | rb_ssl_connect_realcb(F, RB_ERROR_SSL, sconn); | |
646 | return; | |
647 | } | |
648 | } | |
649 | else | |
650 | { | |
651 | rb_ssl_connect_realcb(F, RB_OK, sconn); | |
652 | } | |
653 | } | |
654 | ||
655 | int | |
656 | rb_init_prng(const char *path, prng_seed_t seed_type) | |
657 | { | |
658 | if(seed_type == RB_PRNG_DEFAULT) | |
659 | { | |
3202e249 | 660 | #ifdef _WIN32 |
db137867 AC |
661 | RAND_screen(); |
662 | #endif | |
663 | return RAND_status(); | |
664 | } | |
665 | if(path == NULL) | |
666 | return RAND_status(); | |
667 | ||
668 | switch (seed_type) | |
669 | { | |
db137867 AC |
670 | case RB_PRNG_FILE: |
671 | if(RAND_load_file(path, -1) == -1) | |
672 | return -1; | |
673 | break; | |
3202e249 | 674 | #ifdef _WIN32 |
db137867 AC |
675 | case RB_PRNGWIN32: |
676 | RAND_screen(); | |
677 | break; | |
678 | #endif | |
679 | default: | |
680 | return -1; | |
681 | } | |
682 | ||
683 | return RAND_status(); | |
684 | } | |
685 | ||
686 | int | |
687 | rb_get_random(void *buf, size_t length) | |
688 | { | |
a9fb3ed0 | 689 | int ret; |
3202e249 | 690 | |
a9fb3ed0 | 691 | if((ret = RAND_bytes(buf, length)) == 0) |
db137867 | 692 | { |
a9fb3ed0 | 693 | /* remove the error from the queue */ |
3202e249 | 694 | ERR_get_error(); |
db137867 | 695 | } |
a9fb3ed0 | 696 | return ret; |
db137867 AC |
697 | } |
698 | ||
db137867 | 699 | const char * |
3202e249 | 700 | rb_get_ssl_strerror(rb_fde_t *F) |
db137867 | 701 | { |
918d73d5 | 702 | return get_ssl_error(F->ssl_errno); |
db137867 AC |
703 | } |
704 | ||
e3760ba7 | 705 | static int |
03469187 SA |
706 | make_certfp(X509 *cert, uint8_t certfp[RB_SSL_CERTFP_LEN], int method) |
707 | { | |
708 | const ASN1_ITEM *it; | |
709 | const EVP_MD *evp; | |
710 | void *data; | |
b28c26d9 | 711 | unsigned int len; |
03469187 SA |
712 | |
713 | switch(method) | |
714 | { | |
715 | case RB_SSL_CERTFP_METH_CERT_SHA1: | |
716 | it = ASN1_ITEM_rptr(X509); | |
717 | evp = EVP_sha1(); | |
718 | data = cert; | |
719 | len = RB_SSL_CERTFP_LEN_SHA1; | |
720 | break; | |
721 | case RB_SSL_CERTFP_METH_CERT_SHA256: | |
722 | it = ASN1_ITEM_rptr(X509); | |
723 | evp = EVP_sha256(); | |
724 | data = cert; | |
725 | len = RB_SSL_CERTFP_LEN_SHA256; | |
726 | break; | |
727 | case RB_SSL_CERTFP_METH_CERT_SHA512: | |
728 | it = ASN1_ITEM_rptr(X509); | |
729 | evp = EVP_sha512(); | |
730 | data = cert; | |
731 | len = RB_SSL_CERTFP_LEN_SHA512; | |
732 | break; | |
733 | case RB_SSL_CERTFP_METH_SPKI_SHA256: | |
734 | it = ASN1_ITEM_rptr(X509_PUBKEY); | |
735 | evp = EVP_sha256(); | |
736 | data = X509_get_X509_PUBKEY(cert); | |
737 | len = RB_SSL_CERTFP_LEN_SHA256; | |
738 | break; | |
739 | case RB_SSL_CERTFP_METH_SPKI_SHA512: | |
740 | it = ASN1_ITEM_rptr(X509_PUBKEY); | |
741 | evp = EVP_sha512(); | |
742 | data = X509_get_X509_PUBKEY(cert); | |
743 | len = RB_SSL_CERTFP_LEN_SHA512; | |
744 | break; | |
745 | default: | |
746 | return 0; | |
747 | } | |
748 | ||
749 | if (ASN1_item_digest(it, evp, data, certfp, &len) != 1) | |
750 | len = 0; | |
b28c26d9 | 751 | return (int) len; |
03469187 SA |
752 | } |
753 | ||
7247337a | 754 | int |
e6bbb410 | 755 | rb_get_ssl_certfp(rb_fde_t *F, uint8_t certfp[RB_SSL_CERTFP_LEN], int method) |
7247337a | 756 | { |
e3760ba7 | 757 | int len = 0; |
7247337a JT |
758 | X509 *cert; |
759 | int res; | |
760 | ||
761 | if (F->ssl == NULL) | |
762 | return 0; | |
763 | ||
764 | cert = SSL_get_peer_certificate((SSL *) F->ssl); | |
e3760ba7 AJ |
765 | if(cert == NULL) |
766 | return 0; | |
767 | ||
768 | res = SSL_get_verify_result((SSL *) F->ssl); | |
769 | switch(res) | |
7247337a | 770 | { |
e3760ba7 AJ |
771 | case X509_V_OK: |
772 | case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: | |
773 | case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: | |
774 | case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: | |
775 | case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: | |
776 | case X509_V_ERR_CERT_UNTRUSTED: | |
777 | len = make_certfp(cert, certfp, method); | |
778 | ||
779 | default: /* to silence code inspectors */ | |
780 | break; | |
7247337a JT |
781 | } |
782 | ||
e3760ba7 AJ |
783 | X509_free(cert); |
784 | return len; | |
7247337a JT |
785 | } |
786 | ||
03469187 SA |
787 | int |
788 | rb_get_ssl_certfp_file(const char *filename, uint8_t certfp[RB_SSL_CERTFP_LEN], int method) | |
789 | { | |
790 | X509 *cert; | |
791 | FILE *f = fopen(filename, "r"); | |
792 | ||
793 | if (!f) | |
794 | return -1; | |
795 | ||
796 | cert = PEM_read_X509(f, NULL, NULL, NULL); | |
797 | fclose(f); | |
798 | ||
799 | if (cert) { | |
800 | unsigned int len = make_certfp(cert, certfp, method); | |
801 | X509_free(cert); | |
802 | return len; | |
803 | } | |
804 | return 0; | |
805 | } | |
806 | ||
db137867 AC |
807 | int |
808 | rb_supports_ssl(void) | |
809 | { | |
810 | return 1; | |
811 | } | |
812 | ||
030272f3 VY |
813 | void |
814 | rb_get_ssl_info(char *buf, size_t len) | |
815 | { | |
5203cba5 | 816 | snprintf(buf, len, "Using SSL: %s compiled: 0x%lx, library 0x%lx", |
e732a57b JT |
817 | SSLeay_version(SSLEAY_VERSION), |
818 | (long)OPENSSL_VERSION_NUMBER, SSLeay()); | |
030272f3 VY |
819 | } |
820 | ||
833b2f9c AC |
821 | const char * |
822 | rb_ssl_get_cipher(rb_fde_t *F) | |
823 | { | |
824 | const SSL_CIPHER *sslciph; | |
825 | ||
826 | if(F == NULL || F->ssl == NULL) | |
827 | return NULL; | |
828 | ||
829 | if((sslciph = SSL_get_current_cipher(F->ssl)) == NULL) | |
830 | return NULL; | |
831 | ||
832 | return SSL_CIPHER_get_name(sslciph); | |
833 | } | |
030272f3 | 834 | |
b1f05493 | 835 | #endif /* HAVE_OPENSSL */ |