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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 | |
0fe9dd41 | 343 | rb_setup_ssl_server(const char *certfile, const char *keyfile, const char *dhfile, const char *cipher_list) |
cf12678b AJ |
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 | ||
0fe9dd41 | 351 | if(certfile == NULL) |
cf12678b AJ |
352 | { |
353 | rb_lib_log("rb_setup_ssl_server: No certificate file"); | |
354 | return 0; | |
355 | } | |
356 | ||
357 | if(keyfile == NULL) | |
0fe9dd41 | 358 | keyfile = certfile; |
cf12678b | 359 | |
92404a1a AJ |
360 | if(cipher_list == NULL) |
361 | cipher_list = librb_ciphers; | |
362 | ||
cf12678b AJ |
363 | if (ssl_server_ctx) |
364 | SSL_CTX_free(ssl_server_ctx); | |
365 | ||
366 | if (ssl_client_ctx) | |
367 | SSL_CTX_free(ssl_client_ctx); | |
368 | ||
369 | #ifdef LRB_HAVE_TLS_METHOD_API | |
a4c8c827 | 370 | ssl_server_ctx = SSL_CTX_new(TLS_server_method()); |
92404a1a | 371 | ssl_client_ctx = SSL_CTX_new(TLS_client_method()); |
cf12678b AJ |
372 | #else |
373 | ssl_server_ctx = SSL_CTX_new(SSLv23_server_method()); | |
92404a1a | 374 | ssl_client_ctx = SSL_CTX_new(SSLv23_client_method()); |
cf12678b | 375 | #endif |
a4c8c827 | 376 | |
db137867 AC |
377 | if(ssl_server_ctx == NULL) |
378 | { | |
379 | rb_lib_log("rb_init_openssl: Unable to initialize OpenSSL server context: %s", | |
918d73d5 | 380 | get_ssl_error(ERR_get_error())); |
92404a1a | 381 | return 0; |
db137867 | 382 | } |
a4c8c827 | 383 | |
92404a1a AJ |
384 | if(ssl_client_ctx == NULL) |
385 | { | |
386 | rb_lib_log("rb_init_openssl: Unable to initialize OpenSSL client context: %s", | |
387 | get_ssl_error(ERR_get_error())); | |
388 | return 0; | |
389 | } | |
a4c8c827 | 390 | |
92404a1a AJ |
391 | #ifndef LRB_HAVE_TLS_METHOD_API |
392 | SSL_CTX_set_options(ssl_server_ctx, SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3); | |
393 | SSL_CTX_set_options(ssl_client_ctx, SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3); | |
394 | #endif | |
a4c8c827 | 395 | |
92404a1a AJ |
396 | #ifdef SSL_OP_SINGLE_DH_USE |
397 | SSL_CTX_set_options(ssl_server_ctx, SSL_OP_SINGLE_DH_USE); | |
398 | #endif | |
a4c8c827 | 399 | |
92404a1a AJ |
400 | #ifdef SSL_OP_SINGLE_ECDH_USE |
401 | SSL_CTX_set_options(ssl_server_ctx, SSL_OP_SINGLE_ECDH_USE); | |
402 | #endif | |
b6e799f5 | 403 | |
92404a1a AJ |
404 | #ifdef SSL_OP_NO_TICKET |
405 | SSL_CTX_set_options(ssl_server_ctx, SSL_OP_NO_TICKET); | |
406 | SSL_CTX_set_options(ssl_client_ctx, SSL_OP_NO_TICKET); | |
407 | #endif | |
b1f05493 | 408 | |
92404a1a AJ |
409 | #ifdef SSL_OP_CIPHER_SERVER_PREFERENCE |
410 | SSL_CTX_set_options(ssl_server_ctx, SSL_OP_CIPHER_SERVER_PREFERENCE); | |
411 | #endif | |
b1f05493 | 412 | |
92404a1a AJ |
413 | SSL_CTX_set_verify(ssl_server_ctx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, verify_accept_all_cb); |
414 | SSL_CTX_set_session_cache_mode(ssl_server_ctx, SSL_SESS_CACHE_OFF); | |
cf12678b | 415 | |
92404a1a AJ |
416 | #ifdef LRB_HAVE_TLS_SET_CURVES |
417 | SSL_CTX_set1_curves_list(ssl_server_ctx, librb_curves); | |
cf12678b | 418 | #endif |
db137867 | 419 | |
92404a1a AJ |
420 | #ifdef LRB_HAVE_TLS_ECDH_AUTO |
421 | SSL_CTX_set_ecdh_auto(ssl_server_ctx, 1); | |
422 | #endif | |
6b6a5799 | 423 | |
92404a1a AJ |
424 | /* |
425 | * Set manual ECDHE curve on OpenSSL 1.0.0 & 1.0.1, but make sure it's actually available | |
426 | */ | |
427 | #if (OPENSSL_VERSION_NUMBER >= 0x10000000L) && (OPENSSL_VERSION_NUMBER < 0x10002000L) && !defined(OPENSSL_NO_ECDH) | |
428 | EC_KEY *key = EC_KEY_new_by_curve_name(NID_secp384r1); | |
429 | if (key) { | |
430 | SSL_CTX_set_tmp_ecdh(ssl_server_ctx, key); | |
431 | EC_KEY_free(key); | |
cf12678b | 432 | } |
92404a1a | 433 | #endif |
db137867 | 434 | |
cf12678b AJ |
435 | SSL_CTX_set_cipher_list(ssl_server_ctx, cipher_list); |
436 | SSL_CTX_set_cipher_list(ssl_client_ctx, cipher_list); | |
db137867 | 437 | |
0fe9dd41 | 438 | if(!SSL_CTX_use_certificate_chain_file(ssl_server_ctx, certfile) || !SSL_CTX_use_certificate_chain_file(ssl_client_ctx, certfile)) |
db137867 | 439 | { |
0fe9dd41 | 440 | rb_lib_log("rb_setup_ssl_server: Error loading certificate file [%s]: %s", certfile, |
cf12678b | 441 | get_ssl_error(ERR_get_error())); |
db137867 AC |
442 | return 0; |
443 | } | |
444 | ||
07e14084 | 445 | 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 | 446 | { |
db137867 | 447 | rb_lib_log("rb_setup_ssl_server: Error loading keyfile [%s]: %s", keyfile, |
cf12678b | 448 | get_ssl_error(ERR_get_error())); |
db137867 AC |
449 | return 0; |
450 | } | |
451 | ||
452 | if(dhfile != NULL) | |
453 | { | |
454 | /* DH parameters aren't necessary, but they are nice..if they didn't pass one..that is their problem */ | |
3057f91d AJ |
455 | FILE *fp = fopen(dhfile, "r"); |
456 | DH *dh = NULL; | |
457 | ||
458 | if(fp == NULL) | |
db137867 | 459 | { |
3057f91d AJ |
460 | rb_lib_log("rb_setup_ssl_server: Error loading DH params file [%s]: %s", |
461 | dhfile, strerror(errno)); | |
3202e249 | 462 | } |
3057f91d | 463 | else if(PEM_read_DHparams(fp, &dh, NULL, NULL) == NULL) |
3202e249 | 464 | { |
3202e249 | 465 | rb_lib_log("rb_setup_ssl_server: Error loading DH params file [%s]: %s", |
3057f91d AJ |
466 | dhfile, get_ssl_error(ERR_get_error())); |
467 | fclose(fp); | |
468 | } | |
469 | else | |
470 | { | |
471 | SSL_CTX_set_tmp_dh(ssl_server_ctx, dh); | |
472 | DH_free(dh); | |
473 | fclose(fp); | |
db137867 AC |
474 | } |
475 | } | |
c1725bda | 476 | |
db137867 AC |
477 | return 1; |
478 | } | |
479 | ||
480 | int | |
aa4737a0 | 481 | rb_ssl_listen(rb_fde_t *F, int backlog, int defer_accept) |
db137867 | 482 | { |
aa4737a0 AC |
483 | int result; |
484 | ||
485 | result = rb_listen(F, backlog, defer_accept); | |
db137867 | 486 | F->type = RB_FD_SOCKET | RB_FD_LISTEN | RB_FD_SSL; |
aa4737a0 AC |
487 | |
488 | return result; | |
db137867 AC |
489 | } |
490 | ||
491 | struct ssl_connect | |
492 | { | |
493 | CNCB *callback; | |
494 | void *data; | |
495 | int timeout; | |
496 | }; | |
497 | ||
498 | static void | |
3202e249 | 499 | rb_ssl_connect_realcb(rb_fde_t *F, int status, struct ssl_connect *sconn) |
db137867 AC |
500 | { |
501 | F->connect->callback = sconn->callback; | |
502 | F->connect->data = sconn->data; | |
503 | rb_free(sconn); | |
504 | rb_connect_callback(F, status); | |
505 | } | |
506 | ||
507 | static void | |
3202e249 | 508 | rb_ssl_tryconn_timeout_cb(rb_fde_t *F, void *data) |
db137867 AC |
509 | { |
510 | rb_ssl_connect_realcb(F, RB_ERR_TIMEOUT, data); | |
511 | } | |
512 | ||
513 | static void | |
3202e249 | 514 | rb_ssl_tryconn_cb(rb_fde_t *F, void *data) |
db137867 AC |
515 | { |
516 | struct ssl_connect *sconn = data; | |
517 | int ssl_err; | |
518 | if(!SSL_is_init_finished((SSL *) F->ssl)) | |
519 | { | |
520 | if((ssl_err = SSL_connect((SSL *) F->ssl)) <= 0) | |
521 | { | |
522 | switch (ssl_err = SSL_get_error((SSL *) F->ssl, ssl_err)) | |
523 | { | |
524 | case SSL_ERROR_SYSCALL: | |
525 | if(rb_ignore_errno(errno)) | |
526 | case SSL_ERROR_WANT_READ: | |
527 | case SSL_ERROR_WANT_WRITE: | |
528 | { | |
529 | F->ssl_errno = get_last_err(); | |
530 | rb_setselect(F, RB_SELECT_READ | RB_SELECT_WRITE, | |
531 | rb_ssl_tryconn_cb, sconn); | |
532 | return; | |
533 | } | |
534 | default: | |
535 | F->ssl_errno = get_last_err(); | |
536 | rb_ssl_connect_realcb(F, RB_ERROR_SSL, sconn); | |
537 | return; | |
538 | } | |
539 | } | |
540 | else | |
541 | { | |
542 | rb_ssl_connect_realcb(F, RB_OK, sconn); | |
543 | } | |
544 | } | |
545 | } | |
546 | ||
547 | static void | |
3202e249 | 548 | rb_ssl_tryconn(rb_fde_t *F, int status, void *data) |
db137867 AC |
549 | { |
550 | struct ssl_connect *sconn = data; | |
551 | int ssl_err; | |
552 | if(status != RB_OK) | |
553 | { | |
554 | rb_ssl_connect_realcb(F, status, sconn); | |
555 | return; | |
556 | } | |
557 | ||
558 | F->type |= RB_FD_SSL; | |
559 | F->ssl = SSL_new(ssl_client_ctx); | |
560 | SSL_set_fd((SSL *) F->ssl, F->fd); | |
c2ac22cc | 561 | rb_setup_ssl_cb(F); |
db137867 AC |
562 | rb_settimeout(F, sconn->timeout, rb_ssl_tryconn_timeout_cb, sconn); |
563 | if((ssl_err = SSL_connect((SSL *) F->ssl)) <= 0) | |
564 | { | |
565 | switch (ssl_err = SSL_get_error((SSL *) F->ssl, ssl_err)) | |
566 | { | |
567 | case SSL_ERROR_SYSCALL: | |
568 | if(rb_ignore_errno(errno)) | |
569 | case SSL_ERROR_WANT_READ: | |
570 | case SSL_ERROR_WANT_WRITE: | |
571 | { | |
572 | F->ssl_errno = get_last_err(); | |
573 | rb_setselect(F, RB_SELECT_READ | RB_SELECT_WRITE, | |
574 | rb_ssl_tryconn_cb, sconn); | |
575 | return; | |
576 | } | |
577 | default: | |
578 | F->ssl_errno = get_last_err(); | |
579 | rb_ssl_connect_realcb(F, RB_ERROR_SSL, sconn); | |
580 | return; | |
581 | } | |
582 | } | |
583 | else | |
584 | { | |
585 | rb_ssl_connect_realcb(F, RB_OK, sconn); | |
586 | } | |
587 | } | |
588 | ||
589 | void | |
3202e249 | 590 | rb_connect_tcp_ssl(rb_fde_t *F, struct sockaddr *dest, |
5ad62c80 | 591 | struct sockaddr *clocal, CNCB * callback, void *data, int timeout) |
db137867 AC |
592 | { |
593 | struct ssl_connect *sconn; | |
594 | if(F == NULL) | |
595 | return; | |
596 | ||
597 | sconn = rb_malloc(sizeof(struct ssl_connect)); | |
598 | sconn->data = data; | |
599 | sconn->callback = callback; | |
600 | sconn->timeout = timeout; | |
5ad62c80 | 601 | rb_connect_tcp(F, dest, clocal, rb_ssl_tryconn, sconn, timeout); |
db137867 AC |
602 | } |
603 | ||
604 | void | |
3202e249 | 605 | rb_ssl_start_connected(rb_fde_t *F, CNCB * callback, void *data, int timeout) |
db137867 AC |
606 | { |
607 | struct ssl_connect *sconn; | |
608 | int ssl_err; | |
609 | if(F == NULL) | |
610 | return; | |
611 | ||
612 | sconn = rb_malloc(sizeof(struct ssl_connect)); | |
613 | sconn->data = data; | |
614 | sconn->callback = callback; | |
615 | sconn->timeout = timeout; | |
616 | F->connect = rb_malloc(sizeof(struct conndata)); | |
617 | F->connect->callback = callback; | |
618 | F->connect->data = data; | |
619 | F->type |= RB_FD_SSL; | |
620 | F->ssl = SSL_new(ssl_client_ctx); | |
3202e249 | 621 | |
db137867 | 622 | SSL_set_fd((SSL *) F->ssl, F->fd); |
c2ac22cc | 623 | rb_setup_ssl_cb(F); |
db137867 AC |
624 | rb_settimeout(F, sconn->timeout, rb_ssl_tryconn_timeout_cb, sconn); |
625 | if((ssl_err = SSL_connect((SSL *) F->ssl)) <= 0) | |
626 | { | |
627 | switch (ssl_err = SSL_get_error((SSL *) F->ssl, ssl_err)) | |
628 | { | |
629 | case SSL_ERROR_SYSCALL: | |
630 | if(rb_ignore_errno(errno)) | |
631 | case SSL_ERROR_WANT_READ: | |
632 | case SSL_ERROR_WANT_WRITE: | |
633 | { | |
634 | F->ssl_errno = get_last_err(); | |
635 | rb_setselect(F, RB_SELECT_READ | RB_SELECT_WRITE, | |
636 | rb_ssl_tryconn_cb, sconn); | |
637 | return; | |
638 | } | |
639 | default: | |
640 | F->ssl_errno = get_last_err(); | |
641 | rb_ssl_connect_realcb(F, RB_ERROR_SSL, sconn); | |
642 | return; | |
643 | } | |
644 | } | |
645 | else | |
646 | { | |
647 | rb_ssl_connect_realcb(F, RB_OK, sconn); | |
648 | } | |
649 | } | |
650 | ||
651 | int | |
652 | rb_init_prng(const char *path, prng_seed_t seed_type) | |
653 | { | |
654 | if(seed_type == RB_PRNG_DEFAULT) | |
655 | { | |
3202e249 | 656 | #ifdef _WIN32 |
db137867 AC |
657 | RAND_screen(); |
658 | #endif | |
659 | return RAND_status(); | |
660 | } | |
661 | if(path == NULL) | |
662 | return RAND_status(); | |
663 | ||
664 | switch (seed_type) | |
665 | { | |
db137867 AC |
666 | case RB_PRNG_FILE: |
667 | if(RAND_load_file(path, -1) == -1) | |
668 | return -1; | |
669 | break; | |
3202e249 | 670 | #ifdef _WIN32 |
db137867 AC |
671 | case RB_PRNGWIN32: |
672 | RAND_screen(); | |
673 | break; | |
674 | #endif | |
675 | default: | |
676 | return -1; | |
677 | } | |
678 | ||
679 | return RAND_status(); | |
680 | } | |
681 | ||
682 | int | |
683 | rb_get_random(void *buf, size_t length) | |
684 | { | |
a9fb3ed0 | 685 | int ret; |
3202e249 | 686 | |
a9fb3ed0 | 687 | if((ret = RAND_bytes(buf, length)) == 0) |
db137867 | 688 | { |
a9fb3ed0 | 689 | /* remove the error from the queue */ |
3202e249 | 690 | ERR_get_error(); |
db137867 | 691 | } |
a9fb3ed0 | 692 | return ret; |
db137867 AC |
693 | } |
694 | ||
db137867 | 695 | const char * |
3202e249 | 696 | rb_get_ssl_strerror(rb_fde_t *F) |
db137867 | 697 | { |
918d73d5 | 698 | return get_ssl_error(F->ssl_errno); |
db137867 AC |
699 | } |
700 | ||
e3760ba7 | 701 | static int |
03469187 SA |
702 | make_certfp(X509 *cert, uint8_t certfp[RB_SSL_CERTFP_LEN], int method) |
703 | { | |
704 | const ASN1_ITEM *it; | |
705 | const EVP_MD *evp; | |
706 | void *data; | |
b28c26d9 | 707 | unsigned int len; |
03469187 SA |
708 | |
709 | switch(method) | |
710 | { | |
711 | case RB_SSL_CERTFP_METH_CERT_SHA1: | |
712 | it = ASN1_ITEM_rptr(X509); | |
713 | evp = EVP_sha1(); | |
714 | data = cert; | |
715 | len = RB_SSL_CERTFP_LEN_SHA1; | |
716 | break; | |
717 | case RB_SSL_CERTFP_METH_CERT_SHA256: | |
718 | it = ASN1_ITEM_rptr(X509); | |
719 | evp = EVP_sha256(); | |
720 | data = cert; | |
721 | len = RB_SSL_CERTFP_LEN_SHA256; | |
722 | break; | |
723 | case RB_SSL_CERTFP_METH_CERT_SHA512: | |
724 | it = ASN1_ITEM_rptr(X509); | |
725 | evp = EVP_sha512(); | |
726 | data = cert; | |
727 | len = RB_SSL_CERTFP_LEN_SHA512; | |
728 | break; | |
729 | case RB_SSL_CERTFP_METH_SPKI_SHA256: | |
730 | it = ASN1_ITEM_rptr(X509_PUBKEY); | |
731 | evp = EVP_sha256(); | |
732 | data = X509_get_X509_PUBKEY(cert); | |
733 | len = RB_SSL_CERTFP_LEN_SHA256; | |
734 | break; | |
735 | case RB_SSL_CERTFP_METH_SPKI_SHA512: | |
736 | it = ASN1_ITEM_rptr(X509_PUBKEY); | |
737 | evp = EVP_sha512(); | |
738 | data = X509_get_X509_PUBKEY(cert); | |
739 | len = RB_SSL_CERTFP_LEN_SHA512; | |
740 | break; | |
741 | default: | |
742 | return 0; | |
743 | } | |
744 | ||
745 | if (ASN1_item_digest(it, evp, data, certfp, &len) != 1) | |
746 | len = 0; | |
b28c26d9 | 747 | return (int) len; |
03469187 SA |
748 | } |
749 | ||
7247337a | 750 | int |
e6bbb410 | 751 | rb_get_ssl_certfp(rb_fde_t *F, uint8_t certfp[RB_SSL_CERTFP_LEN], int method) |
7247337a | 752 | { |
e3760ba7 | 753 | int len = 0; |
7247337a JT |
754 | X509 *cert; |
755 | int res; | |
756 | ||
757 | if (F->ssl == NULL) | |
758 | return 0; | |
759 | ||
760 | cert = SSL_get_peer_certificate((SSL *) F->ssl); | |
e3760ba7 AJ |
761 | if(cert == NULL) |
762 | return 0; | |
763 | ||
764 | res = SSL_get_verify_result((SSL *) F->ssl); | |
765 | switch(res) | |
7247337a | 766 | { |
e3760ba7 AJ |
767 | case X509_V_OK: |
768 | case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: | |
769 | case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: | |
770 | case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: | |
771 | case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: | |
772 | case X509_V_ERR_CERT_UNTRUSTED: | |
773 | len = make_certfp(cert, certfp, method); | |
774 | ||
775 | default: /* to silence code inspectors */ | |
776 | break; | |
7247337a JT |
777 | } |
778 | ||
e3760ba7 AJ |
779 | X509_free(cert); |
780 | return len; | |
7247337a JT |
781 | } |
782 | ||
03469187 SA |
783 | int |
784 | rb_get_ssl_certfp_file(const char *filename, uint8_t certfp[RB_SSL_CERTFP_LEN], int method) | |
785 | { | |
786 | X509 *cert; | |
787 | FILE *f = fopen(filename, "r"); | |
788 | ||
789 | if (!f) | |
790 | return -1; | |
791 | ||
792 | cert = PEM_read_X509(f, NULL, NULL, NULL); | |
793 | fclose(f); | |
794 | ||
795 | if (cert) { | |
796 | unsigned int len = make_certfp(cert, certfp, method); | |
797 | X509_free(cert); | |
798 | return len; | |
799 | } | |
800 | return 0; | |
801 | } | |
802 | ||
db137867 AC |
803 | int |
804 | rb_supports_ssl(void) | |
805 | { | |
806 | return 1; | |
807 | } | |
808 | ||
030272f3 VY |
809 | void |
810 | rb_get_ssl_info(char *buf, size_t len) | |
811 | { | |
c40eede1 AJ |
812 | #if (OPENSSL_VERSION_NUMBER >= 0x10100000L) |
813 | if (OpenSSL_version_num() == OPENSSL_VERSION_NUMBER) | |
814 | snprintf(buf, len, "OpenSSL: 0x%lx, %s", | |
815 | OPENSSL_VERSION_NUMBER, OPENSSL_VERSION_TEXT); | |
816 | else | |
817 | snprintf(buf, len, "OpenSSL: compiled (0x%lx, %s), library (0x%lx, %s)", | |
818 | OPENSSL_VERSION_NUMBER, OPENSSL_VERSION_TEXT, | |
819 | OpenSSL_version_num(), OpenSSL_version(OPENSSL_VERSION)); | |
820 | #else | |
821 | if (SSLeay() == SSLEAY_VERSION_NUMBER) | |
822 | snprintf(buf, len, "OpenSSL: 0x%lx, %s", | |
823 | SSLeay(), SSLeay_version(SSLEAY_VERSION)); | |
824 | else | |
825 | snprintf(buf, len, "OpenSSL: compiled (0x%lx, %s), library (0x%lx, %s)", | |
826 | SSLEAY_VERSION_NUMBER, "???", | |
827 | SSLeay(), SSLeay_version(SSLEAY_VERSION)); | |
828 | #endif | |
030272f3 VY |
829 | } |
830 | ||
833b2f9c AC |
831 | const char * |
832 | rb_ssl_get_cipher(rb_fde_t *F) | |
833 | { | |
834 | const SSL_CIPHER *sslciph; | |
835 | ||
836 | if(F == NULL || F->ssl == NULL) | |
837 | return NULL; | |
838 | ||
839 | if((sslciph = SSL_get_current_cipher(F->ssl)) == NULL) | |
840 | return NULL; | |
841 | ||
842 | return SSL_CIPHER_get_name(sslciph); | |
843 | } | |
030272f3 | 844 | |
b1f05493 | 845 | #endif /* HAVE_OPENSSL */ |