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Commit | Line | Data |
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2bd29df9 | 1 | /* |
fe037171 | 2 | * librb: a library used by charybdis and other things |
2bd29df9 AB |
3 | * gnutls.c: gnutls 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 | * |
2bd29df9 AB |
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 | * | |
2bd29df9 AB |
23 | */ |
24 | ||
fe037171 EM |
25 | #include <librb_config.h> |
26 | #include <rb_lib.h> | |
2bd29df9 AB |
27 | #include <commio-int.h> |
28 | #include <commio-ssl.h> | |
cf430c1a | 29 | #include <stdbool.h> |
2bd29df9 AB |
30 | #ifdef HAVE_GNUTLS |
31 | ||
32 | #include <gnutls/gnutls.h> | |
33 | #include <gnutls/x509.h> | |
cf430c1a | 34 | #include <gnutls/abstract.h> |
7aa40f6d | 35 | |
c56f5979 | 36 | #if (GNUTLS_VERSION_MAJOR < 3) |
7aa40f6d | 37 | # include <gcrypt.h> |
c56f5979 VI |
38 | #else |
39 | # include <gnutls/crypto.h> | |
7aa40f6d | 40 | #endif |
2bd29df9 | 41 | |
c56f5979 VI |
42 | static gnutls_certificate_credentials_t x509; |
43 | static gnutls_dh_params_t dh_params; | |
673ec98e | 44 | static gnutls_priority_t default_priority; |
2bd29df9 AB |
45 | |
46 | /* These are all used for getting GnuTLS to supply a client cert. */ | |
47 | #define MAX_CERTS 6 | |
48 | static unsigned int x509_cert_count; | |
49 | static gnutls_x509_crt_t x509_cert[MAX_CERTS]; | |
50 | static gnutls_x509_privkey_t x509_key; | |
f7036bbe | 51 | #if GNUTLS_VERSION_MAJOR < 3 |
2bd29df9 AB |
52 | static int cert_callback(gnutls_session_t session, const gnutls_datum_t *req_ca_rdn, int nreqs, |
53 | const gnutls_pk_algorithm_t *sign_algos, int sign_algos_len, gnutls_retr_st *st); | |
f7036bbe AC |
54 | #else |
55 | static int cert_callback(gnutls_session_t session, const gnutls_datum_t *req_ca_rdn, int nreqs, | |
56 | const gnutls_pk_algorithm_t *sign_algos, int sign_algos_len, gnutls_retr2_st *st); | |
57 | #endif | |
2bd29df9 AB |
58 | |
59 | #define SSL_P(x) *((gnutls_session_t *)F->ssl) | |
60 | ||
61 | void | |
62 | rb_ssl_shutdown(rb_fde_t *F) | |
63 | { | |
64 | int i; | |
65 | if(F == NULL || F->ssl == NULL) | |
66 | return; | |
67 | for(i = 0; i < 4; i++) | |
68 | { | |
69 | if(gnutls_bye(SSL_P(F), GNUTLS_SHUT_RDWR) == GNUTLS_E_SUCCESS) | |
70 | break; | |
71 | } | |
72 | gnutls_deinit(SSL_P(F)); | |
73 | rb_free(F->ssl); | |
74 | } | |
75 | ||
76 | unsigned int | |
77 | rb_ssl_handshake_count(rb_fde_t *F) | |
78 | { | |
79 | return F->handshake_count; | |
80 | } | |
81 | ||
82 | void | |
83 | rb_ssl_clear_handshake_count(rb_fde_t *F) | |
84 | { | |
85 | F->handshake_count = 0; | |
86 | } | |
87 | ||
88 | static void | |
89 | rb_ssl_timeout(rb_fde_t *F, void *notused) | |
90 | { | |
91 | lrb_assert(F->accept != NULL); | |
92 | F->accept->callback(F, RB_ERR_TIMEOUT, NULL, 0, F->accept->data); | |
93 | } | |
94 | ||
95 | ||
96 | static int | |
97 | do_ssl_handshake(rb_fde_t *F, PF * callback, void *data) | |
98 | { | |
99 | int ret; | |
100 | int flags; | |
101 | ||
102 | ret = gnutls_handshake(SSL_P(F)); | |
103 | if(ret < 0) | |
104 | { | |
105 | if((ret == GNUTLS_E_INTERRUPTED && rb_ignore_errno(errno)) || ret == GNUTLS_E_AGAIN) | |
106 | { | |
107 | if(gnutls_record_get_direction(SSL_P(F)) == 0) | |
108 | flags = RB_SELECT_READ; | |
109 | else | |
110 | flags = RB_SELECT_WRITE; | |
111 | rb_setselect(F, flags, callback, data); | |
112 | return 0; | |
113 | } | |
114 | F->ssl_errno = ret; | |
115 | return -1; | |
116 | } | |
117 | return 1; /* handshake is finished..go about life */ | |
118 | } | |
119 | ||
120 | static void | |
121 | rb_ssl_tryaccept(rb_fde_t *F, void *data) | |
122 | { | |
123 | int ret; | |
124 | struct acceptdata *ad; | |
125 | ||
126 | lrb_assert(F->accept != NULL); | |
127 | ||
128 | ret = do_ssl_handshake(F, rb_ssl_tryaccept, NULL); | |
129 | ||
130 | /* do_ssl_handshake does the rb_setselect */ | |
131 | if(ret == 0) | |
132 | return; | |
133 | ||
134 | ad = F->accept; | |
135 | F->accept = NULL; | |
136 | rb_settimeout(F, 0, NULL, NULL); | |
137 | rb_setselect(F, RB_SELECT_READ | RB_SELECT_WRITE, NULL, NULL); | |
55abcbb2 | 138 | |
2bd29df9 AB |
139 | if(ret > 0) |
140 | ad->callback(F, RB_OK, (struct sockaddr *)&ad->S, ad->addrlen, ad->data); | |
141 | else | |
142 | ad->callback(F, RB_ERROR_SSL, NULL, 0, ad->data); | |
143 | ||
144 | rb_free(ad); | |
145 | } | |
146 | ||
147 | void | |
148 | rb_ssl_start_accepted(rb_fde_t *new_F, ACCB * cb, void *data, int timeout) | |
149 | { | |
150 | gnutls_session_t *ssl; | |
151 | new_F->type |= RB_FD_SSL; | |
152 | ssl = new_F->ssl = rb_malloc(sizeof(gnutls_session_t)); | |
153 | new_F->accept = rb_malloc(sizeof(struct acceptdata)); | |
154 | ||
155 | new_F->accept->callback = cb; | |
156 | new_F->accept->data = data; | |
157 | rb_settimeout(new_F, timeout, rb_ssl_timeout, NULL); | |
158 | ||
159 | new_F->accept->addrlen = 0; | |
160 | ||
161 | gnutls_init(ssl, GNUTLS_SERVER); | |
162 | gnutls_set_default_priority(*ssl); | |
163 | gnutls_credentials_set(*ssl, GNUTLS_CRD_CERTIFICATE, x509); | |
164 | gnutls_dh_set_prime_bits(*ssl, 1024); | |
165 | gnutls_transport_set_ptr(*ssl, (gnutls_transport_ptr_t) (long int)new_F->fd); | |
166 | gnutls_certificate_server_set_request(*ssl, GNUTLS_CERT_REQUEST); | |
c56f5979 | 167 | gnutls_priority_set(*ssl, default_priority); |
673ec98e | 168 | |
2bd29df9 AB |
169 | if(do_ssl_handshake(new_F, rb_ssl_tryaccept, NULL)) |
170 | { | |
171 | struct acceptdata *ad = new_F->accept; | |
172 | new_F->accept = NULL; | |
173 | ad->callback(new_F, RB_OK, (struct sockaddr *)&ad->S, ad->addrlen, ad->data); | |
174 | rb_free(ad); | |
175 | } | |
176 | ||
177 | } | |
178 | ||
179 | ||
180 | ||
181 | ||
182 | void | |
183 | rb_ssl_accept_setup(rb_fde_t *F, rb_fde_t *new_F, struct sockaddr *st, int addrlen) | |
184 | { | |
185 | new_F->type |= RB_FD_SSL; | |
186 | new_F->ssl = rb_malloc(sizeof(gnutls_session_t)); | |
187 | new_F->accept = rb_malloc(sizeof(struct acceptdata)); | |
188 | ||
189 | new_F->accept->callback = F->accept->callback; | |
190 | new_F->accept->data = F->accept->data; | |
191 | rb_settimeout(new_F, 10, rb_ssl_timeout, NULL); | |
192 | memcpy(&new_F->accept->S, st, addrlen); | |
193 | new_F->accept->addrlen = addrlen; | |
194 | ||
195 | gnutls_init((gnutls_session_t *) new_F->ssl, GNUTLS_SERVER); | |
196 | gnutls_set_default_priority(SSL_P(new_F)); | |
197 | gnutls_credentials_set(SSL_P(new_F), GNUTLS_CRD_CERTIFICATE, x509); | |
198 | gnutls_dh_set_prime_bits(SSL_P(new_F), 1024); | |
199 | gnutls_transport_set_ptr(SSL_P(new_F), (gnutls_transport_ptr_t) (long int)rb_get_fd(new_F)); | |
200 | gnutls_certificate_server_set_request(SSL_P(new_F), GNUTLS_CERT_REQUEST); | |
673ec98e AC |
201 | gnutls_priority_set(SSL_P(F), default_priority); |
202 | ||
2bd29df9 AB |
203 | if(do_ssl_handshake(F, rb_ssl_tryaccept, NULL)) |
204 | { | |
205 | struct acceptdata *ad = F->accept; | |
206 | F->accept = NULL; | |
207 | ad->callback(F, RB_OK, (struct sockaddr *)&ad->S, ad->addrlen, ad->data); | |
208 | rb_free(ad); | |
209 | } | |
210 | } | |
211 | ||
212 | ||
213 | ||
214 | ||
215 | static ssize_t | |
216 | rb_ssl_read_or_write(int r_or_w, rb_fde_t *F, void *rbuf, const void *wbuf, size_t count) | |
217 | { | |
218 | ssize_t ret; | |
219 | gnutls_session_t *ssl = F->ssl; | |
220 | ||
221 | if(r_or_w == 0) | |
222 | ret = gnutls_record_recv(*ssl, rbuf, count); | |
223 | else | |
224 | ret = gnutls_record_send(*ssl, wbuf, count); | |
225 | ||
226 | if(ret < 0) | |
227 | { | |
228 | switch (ret) | |
229 | { | |
230 | case GNUTLS_E_AGAIN: | |
231 | case GNUTLS_E_INTERRUPTED: | |
232 | if(rb_ignore_errno(errno)) | |
233 | { | |
234 | if(gnutls_record_get_direction(*ssl) == 0) | |
235 | return RB_RW_SSL_NEED_READ; | |
236 | else | |
237 | return RB_RW_SSL_NEED_WRITE; | |
238 | break; | |
239 | } | |
240 | default: | |
241 | F->ssl_errno = ret; | |
242 | errno = EIO; | |
243 | return RB_RW_IO_ERROR; | |
244 | } | |
245 | } | |
246 | return ret; | |
247 | } | |
248 | ||
249 | ssize_t | |
250 | rb_ssl_read(rb_fde_t *F, void *buf, size_t count) | |
251 | { | |
252 | return rb_ssl_read_or_write(0, F, buf, NULL, count); | |
253 | } | |
254 | ||
255 | ssize_t | |
256 | rb_ssl_write(rb_fde_t *F, const void *buf, size_t count) | |
257 | { | |
258 | return rb_ssl_read_or_write(1, F, NULL, buf, count); | |
259 | } | |
260 | ||
c56f5979 | 261 | #if (GNUTLS_VERSION_MAJOR < 3) |
2bd29df9 AB |
262 | static void |
263 | rb_gcry_random_seed(void *unused) | |
264 | { | |
265 | gcry_fast_random_poll(); | |
266 | } | |
c56f5979 | 267 | #endif |
2bd29df9 AB |
268 | |
269 | int | |
270 | rb_init_ssl(void) | |
271 | { | |
272 | gnutls_global_init(); | |
273 | ||
274 | if(gnutls_certificate_allocate_credentials(&x509) != GNUTLS_E_SUCCESS) | |
275 | { | |
276 | rb_lib_log("rb_init_ssl: Unable to allocate SSL/TLS certificate credentials"); | |
277 | return 0; | |
278 | } | |
279 | ||
f7036bbe | 280 | #if GNUTLS_VERSION_MAJOR < 3 |
2bd29df9 | 281 | gnutls_certificate_client_set_retrieve_function(x509, cert_callback); |
f7036bbe AC |
282 | #else |
283 | gnutls_certificate_set_retrieve_function(x509, cert_callback); | |
284 | #endif | |
2bd29df9 | 285 | |
c56f5979 | 286 | #if (GNUTLS_VERSION_MAJOR < 3) |
2bd29df9 | 287 | rb_event_addish("rb_gcry_random_seed", rb_gcry_random_seed, NULL, 300); |
c56f5979 VI |
288 | #endif |
289 | ||
2bd29df9 AB |
290 | return 1; |
291 | } | |
292 | ||
293 | /* We only have one certificate to authenticate with, as both client and server. Unfortunately, | |
294 | * GnuTLS tries to be clever, and as client, will attempt to use a certificate that the server | |
295 | * will trust. We usually use self-signed certs, though, so the result of this search is always | |
296 | * nothing. Therefore, it uses no certificate to authenticate as a client. This is undesirable | |
297 | * as it breaks fingerprint auth. Thus, we use this callback to force GnuTLS to always | |
298 | * authenticate with our certificate at all times. | |
299 | */ | |
f7036bbe | 300 | #if GNUTLS_VERSION_MAJOR < 3 |
2bd29df9 AB |
301 | static int |
302 | cert_callback(gnutls_session_t session, const gnutls_datum_t *req_ca_rdn, int nreqs, | |
303 | const gnutls_pk_algorithm_t *sign_algos, int sign_algos_len, gnutls_retr_st *st) | |
f7036bbe AC |
304 | #else |
305 | static int | |
306 | cert_callback(gnutls_session_t session, const gnutls_datum_t *req_ca_rdn, int nreqs, | |
307 | const gnutls_pk_algorithm_t *sign_algos, int sign_algos_len, gnutls_retr2_st *st) | |
308 | #endif | |
2bd29df9 AB |
309 | { |
310 | /* XXX - ugly hack. Tell GnuTLS to use the first (only) certificate we have for auth. */ | |
c56f5979 | 311 | #if (GNUTLS_VERSION_MAJOR < 3) |
2bd29df9 | 312 | st->type = GNUTLS_CRT_X509; |
c56f5979 VI |
313 | #else |
314 | st->cert_type = GNUTLS_CRT_X509; | |
315 | st->key_type = GNUTLS_PRIVKEY_X509; | |
316 | #endif | |
2bd29df9 AB |
317 | st->ncerts = x509_cert_count; |
318 | st->cert.x509 = x509_cert; | |
319 | st->key.x509 = x509_key; | |
c56f5979 | 320 | st->deinit_all = 0; |
2bd29df9 AB |
321 | |
322 | return 0; | |
323 | } | |
324 | ||
325 | static void | |
326 | rb_free_datum_t(gnutls_datum_t * d) | |
327 | { | |
328 | rb_free(d->data); | |
329 | rb_free(d); | |
330 | } | |
331 | ||
332 | static gnutls_datum_t * | |
333 | rb_load_file_into_datum_t(const char *file) | |
334 | { | |
335 | FILE *f; | |
336 | gnutls_datum_t *datum; | |
337 | struct stat fileinfo; | |
31646e89 | 338 | int count; |
2bd29df9 AB |
339 | if((f = fopen(file, "r")) == NULL) |
340 | return NULL; | |
341 | if(fstat(fileno(f), &fileinfo)) | |
342 | return NULL; | |
343 | ||
344 | datum = rb_malloc(sizeof(gnutls_datum_t)); | |
345 | ||
346 | if(fileinfo.st_size > 131072) /* deal with retards */ | |
347 | datum->size = 131072; | |
348 | else | |
349 | datum->size = fileinfo.st_size; | |
350 | ||
351 | datum->data = rb_malloc(datum->size + 1); | |
31646e89 | 352 | count = fread(datum->data, datum->size, 1, f); |
2bd29df9 | 353 | fclose(f); |
31646e89 SA |
354 | |
355 | if(count != 1) | |
356 | { | |
357 | rb_free_datum_t(datum); | |
358 | return NULL; | |
359 | } | |
2bd29df9 AB |
360 | return datum; |
361 | } | |
362 | ||
363 | int | |
c1725bda | 364 | rb_setup_ssl_server(const char *cert, const char *keyfile, const char *dhfile, const char *cipher_list) |
2bd29df9 AB |
365 | { |
366 | int ret; | |
673ec98e | 367 | const char *err; |
2bd29df9 AB |
368 | gnutls_datum_t *d_cert, *d_key; |
369 | if(cert == NULL) | |
370 | { | |
371 | rb_lib_log("rb_setup_ssl_server: No certificate file"); | |
372 | return 0; | |
373 | } | |
374 | ||
375 | if((d_cert = rb_load_file_into_datum_t(cert)) == NULL) | |
376 | { | |
377 | rb_lib_log("rb_setup_ssl_server: Error loading certificate: %s", strerror(errno)); | |
378 | return 0; | |
379 | } | |
380 | ||
381 | if((d_key = rb_load_file_into_datum_t(keyfile)) == NULL) | |
382 | { | |
383 | rb_lib_log("rb_setup_ssl_server: Error loading key: %s", strerror(errno)); | |
384 | return 0; | |
385 | } | |
386 | ||
387 | /* In addition to creating the certificate set, we also need to store our cert elsewhere | |
388 | * so we can force GnuTLS to identify with it when acting as a client. | |
389 | */ | |
390 | gnutls_x509_privkey_init(&x509_key); | |
391 | if ((ret = gnutls_x509_privkey_import(x509_key, d_key, GNUTLS_X509_FMT_PEM)) != GNUTLS_E_SUCCESS) | |
392 | { | |
393 | rb_lib_log("rb_setup_ssl_server: Error loading key file: %s", gnutls_strerror(ret)); | |
394 | return 0; | |
395 | } | |
396 | ||
397 | x509_cert_count = MAX_CERTS; | |
398 | if ((ret = gnutls_x509_crt_list_import(x509_cert, &x509_cert_count, d_cert, GNUTLS_X509_FMT_PEM, | |
399 | GNUTLS_X509_CRT_LIST_IMPORT_FAIL_IF_EXCEED)) < 0) | |
400 | { | |
401 | rb_lib_log("rb_setup_ssl_server: Error loading certificate: %s", gnutls_strerror(ret)); | |
402 | return 0; | |
403 | } | |
404 | x509_cert_count = ret; | |
405 | ||
406 | if((ret = | |
407 | gnutls_certificate_set_x509_key_mem(x509, d_cert, d_key, | |
408 | GNUTLS_X509_FMT_PEM)) != GNUTLS_E_SUCCESS) | |
409 | { | |
410 | rb_lib_log("rb_setup_ssl_server: Error loading certificate or key file: %s", | |
411 | gnutls_strerror(ret)); | |
412 | return 0; | |
413 | } | |
414 | ||
415 | rb_free_datum_t(d_cert); | |
416 | rb_free_datum_t(d_key); | |
417 | ||
418 | if(dhfile != NULL) | |
419 | { | |
420 | if(gnutls_dh_params_init(&dh_params) == GNUTLS_E_SUCCESS) | |
421 | { | |
422 | gnutls_datum_t *data; | |
423 | int xret; | |
424 | data = rb_load_file_into_datum_t(dhfile); | |
425 | if(data != NULL) | |
426 | { | |
427 | xret = gnutls_dh_params_import_pkcs3(dh_params, data, | |
428 | GNUTLS_X509_FMT_PEM); | |
429 | if(xret < 0) | |
430 | rb_lib_log | |
431 | ("rb_setup_ssl_server: Error parsing DH file: %s\n", | |
432 | gnutls_strerror(xret)); | |
433 | rb_free_datum_t(data); | |
434 | } | |
435 | gnutls_certificate_set_dh_params(x509, dh_params); | |
436 | } | |
437 | else | |
438 | rb_lib_log("rb_setup_ssl_server: Unable to setup DH parameters"); | |
439 | } | |
c1725bda | 440 | |
7233e364 | 441 | ret = gnutls_priority_init(&default_priority, cipher_list, &err); |
673ec98e AC |
442 | if (ret < 0) |
443 | { | |
444 | rb_lib_log("rb_setup_ssl_server: syntax error (using defaults instead) in ssl cipher list at: %s", err); | |
445 | gnutls_priority_init(&default_priority, NULL, &err); | |
446 | return 1; | |
447 | } | |
448 | ||
2bd29df9 AB |
449 | return 1; |
450 | } | |
451 | ||
452 | int | |
453 | rb_ssl_listen(rb_fde_t *F, int backlog, int defer_accept) | |
454 | { | |
455 | int result; | |
456 | ||
fab6f9e8 | 457 | result = rb_listen(F, backlog, defer_accept); |
2bd29df9 AB |
458 | F->type = RB_FD_SOCKET | RB_FD_LISTEN | RB_FD_SSL; |
459 | ||
460 | return result; | |
461 | } | |
462 | ||
463 | struct ssl_connect | |
464 | { | |
465 | CNCB *callback; | |
466 | void *data; | |
467 | int timeout; | |
468 | }; | |
469 | ||
470 | static void | |
471 | rb_ssl_connect_realcb(rb_fde_t *F, int status, struct ssl_connect *sconn) | |
472 | { | |
473 | F->connect->callback = sconn->callback; | |
474 | F->connect->data = sconn->data; | |
475 | rb_free(sconn); | |
476 | rb_connect_callback(F, status); | |
477 | } | |
478 | ||
479 | static void | |
480 | rb_ssl_tryconn_timeout_cb(rb_fde_t *F, void *data) | |
481 | { | |
482 | rb_ssl_connect_realcb(F, RB_ERR_TIMEOUT, data); | |
483 | } | |
484 | ||
485 | static void | |
486 | rb_ssl_tryconn_cb(rb_fde_t *F, void *data) | |
487 | { | |
488 | struct ssl_connect *sconn = data; | |
489 | int ret; | |
490 | ||
491 | ret = do_ssl_handshake(F, rb_ssl_tryconn_cb, (void *)sconn); | |
492 | ||
493 | switch (ret) | |
494 | { | |
495 | case -1: | |
496 | rb_ssl_connect_realcb(F, RB_ERROR_SSL, sconn); | |
497 | break; | |
498 | case 0: | |
499 | /* do_ssl_handshake does the rb_setselect stuff */ | |
500 | return; | |
501 | default: | |
502 | break; | |
503 | ||
504 | ||
505 | } | |
506 | rb_ssl_connect_realcb(F, RB_OK, sconn); | |
507 | } | |
508 | ||
509 | static void | |
510 | rb_ssl_tryconn(rb_fde_t *F, int status, void *data) | |
511 | { | |
512 | struct ssl_connect *sconn = data; | |
513 | if(status != RB_OK) | |
514 | { | |
515 | rb_ssl_connect_realcb(F, status, sconn); | |
516 | return; | |
517 | } | |
518 | ||
519 | F->type |= RB_FD_SSL; | |
520 | ||
521 | ||
522 | rb_settimeout(F, sconn->timeout, rb_ssl_tryconn_timeout_cb, sconn); | |
523 | F->ssl = rb_malloc(sizeof(gnutls_session_t)); | |
524 | gnutls_init(F->ssl, GNUTLS_CLIENT); | |
525 | gnutls_set_default_priority(SSL_P(F)); | |
526 | gnutls_credentials_set(SSL_P(F), GNUTLS_CRD_CERTIFICATE, x509); | |
527 | gnutls_dh_set_prime_bits(SSL_P(F), 1024); | |
528 | gnutls_transport_set_ptr(SSL_P(F), (gnutls_transport_ptr_t) (long int)F->fd); | |
673ec98e | 529 | gnutls_priority_set(SSL_P(F), default_priority); |
2bd29df9 AB |
530 | |
531 | do_ssl_handshake(F, rb_ssl_tryconn_cb, (void *)sconn); | |
532 | } | |
533 | ||
534 | void | |
535 | rb_connect_tcp_ssl(rb_fde_t *F, struct sockaddr *dest, | |
5ad62c80 | 536 | struct sockaddr *clocal, CNCB * callback, void *data, int timeout) |
2bd29df9 AB |
537 | { |
538 | struct ssl_connect *sconn; | |
539 | if(F == NULL) | |
540 | return; | |
541 | ||
542 | sconn = rb_malloc(sizeof(struct ssl_connect)); | |
543 | sconn->data = data; | |
544 | sconn->callback = callback; | |
545 | sconn->timeout = timeout; | |
5ad62c80 | 546 | rb_connect_tcp(F, dest, clocal, rb_ssl_tryconn, sconn, timeout); |
2bd29df9 AB |
547 | |
548 | } | |
549 | ||
550 | void | |
551 | rb_ssl_start_connected(rb_fde_t *F, CNCB * callback, void *data, int timeout) | |
552 | { | |
553 | struct ssl_connect *sconn; | |
554 | if(F == NULL) | |
555 | return; | |
556 | ||
557 | sconn = rb_malloc(sizeof(struct ssl_connect)); | |
558 | sconn->data = data; | |
559 | sconn->callback = callback; | |
560 | sconn->timeout = timeout; | |
561 | F->connect = rb_malloc(sizeof(struct conndata)); | |
562 | F->connect->callback = callback; | |
563 | F->connect->data = data; | |
564 | F->type |= RB_FD_SSL; | |
565 | F->ssl = rb_malloc(sizeof(gnutls_session_t)); | |
566 | ||
567 | gnutls_init(F->ssl, GNUTLS_CLIENT); | |
568 | gnutls_set_default_priority(SSL_P(F)); | |
569 | gnutls_credentials_set(SSL_P(F), GNUTLS_CRD_CERTIFICATE, x509); | |
570 | gnutls_dh_set_prime_bits(SSL_P(F), 1024); | |
571 | gnutls_transport_set_ptr(SSL_P(F), (gnutls_transport_ptr_t) (long int)F->fd); | |
673ec98e | 572 | gnutls_priority_set(SSL_P(F), default_priority); |
2bd29df9 AB |
573 | |
574 | rb_settimeout(F, sconn->timeout, rb_ssl_tryconn_timeout_cb, sconn); | |
575 | ||
576 | do_ssl_handshake(F, rb_ssl_tryconn_cb, (void *)sconn); | |
577 | } | |
578 | ||
579 | int | |
580 | rb_init_prng(const char *path, prng_seed_t seed_type) | |
581 | { | |
7aa40f6d | 582 | #if GNUTLS_VERSION_MAJOR < 3 |
2bd29df9 | 583 | gcry_fast_random_poll(); |
7aa40f6d | 584 | #endif |
2bd29df9 AB |
585 | return 1; |
586 | } | |
587 | ||
588 | int | |
589 | rb_get_random(void *buf, size_t length) | |
590 | { | |
7aa40f6d | 591 | #if GNUTLS_VERSION_MAJOR < 3 |
2bd29df9 | 592 | gcry_randomize(buf, length, GCRY_STRONG_RANDOM); |
7aa40f6d AC |
593 | #else |
594 | gnutls_rnd(GNUTLS_RND_KEY, buf, length); | |
595 | #endif | |
2bd29df9 AB |
596 | return 1; |
597 | } | |
598 | ||
2bd29df9 AB |
599 | const char * |
600 | rb_get_ssl_strerror(rb_fde_t *F) | |
601 | { | |
602 | return gnutls_strerror(F->ssl_errno); | |
603 | } | |
604 | ||
e3760ba7 | 605 | static int |
03469187 | 606 | make_certfp(gnutls_x509_crt_t cert, uint8_t certfp[RB_SSL_CERTFP_LEN], int method) |
2bd29df9 | 607 | { |
e6bbb410 | 608 | gnutls_digest_algorithm_t algo; |
2bd29df9 AB |
609 | uint8_t digest[RB_SSL_CERTFP_LEN * 2]; |
610 | size_t digest_size; | |
cf430c1a | 611 | bool spki = false; |
e3760ba7 | 612 | int len; |
2bd29df9 | 613 | |
e6bbb410 EM |
614 | switch(method) |
615 | { | |
cf430c1a | 616 | case RB_SSL_CERTFP_METH_CERT_SHA1: |
e6bbb410 EM |
617 | algo = GNUTLS_DIG_SHA1; |
618 | len = RB_SSL_CERTFP_LEN_SHA1; | |
619 | break; | |
cf430c1a SA |
620 | case RB_SSL_CERTFP_METH_SPKI_SHA256: |
621 | spki = true; | |
622 | case RB_SSL_CERTFP_METH_CERT_SHA256: | |
e6bbb410 EM |
623 | algo = GNUTLS_DIG_SHA256; |
624 | len = RB_SSL_CERTFP_LEN_SHA256; | |
625 | break; | |
cf430c1a SA |
626 | case RB_SSL_CERTFP_METH_SPKI_SHA512: |
627 | spki = true; | |
628 | case RB_SSL_CERTFP_METH_CERT_SHA512: | |
e6bbb410 EM |
629 | algo = GNUTLS_DIG_SHA512; |
630 | len = RB_SSL_CERTFP_LEN_SHA512; | |
631 | break; | |
632 | default: | |
633 | return 0; | |
634 | } | |
635 | ||
cf430c1a | 636 | if (!spki) |
2bd29df9 | 637 | { |
cf430c1a SA |
638 | if (gnutls_x509_crt_get_fingerprint(cert, algo, digest, &digest_size) < 0) |
639 | len = 0; | |
640 | } | |
641 | else | |
642 | { | |
643 | gnutls_pubkey_t pubkey; | |
644 | unsigned char *der_pubkey = NULL; | |
645 | size_t der_pubkey_len = 0; | |
646 | ||
647 | if (gnutls_pubkey_init(&pubkey) == GNUTLS_E_SUCCESS) | |
648 | { | |
649 | if (gnutls_pubkey_import_x509(pubkey, cert, 0) == GNUTLS_E_SUCCESS) | |
650 | { | |
651 | if (gnutls_pubkey_export(pubkey, GNUTLS_X509_FMT_DER, der_pubkey, &der_pubkey_len) == GNUTLS_E_SHORT_MEMORY_BUFFER) | |
652 | { | |
653 | der_pubkey = rb_malloc(der_pubkey_len); | |
654 | ||
655 | if (gnutls_pubkey_export(pubkey, GNUTLS_X509_FMT_DER, der_pubkey, &der_pubkey_len) != GNUTLS_E_SUCCESS) | |
656 | { | |
657 | rb_free(der_pubkey); | |
658 | der_pubkey = NULL; | |
659 | } | |
660 | } | |
661 | } | |
662 | ||
663 | gnutls_pubkey_deinit(pubkey); | |
664 | } | |
665 | ||
666 | if (der_pubkey) | |
667 | { | |
668 | if (gnutls_hash_fast(algo, der_pubkey, der_pubkey_len, digest) != 0) | |
669 | len = 0; | |
670 | ||
671 | rb_free(der_pubkey); | |
672 | } | |
673 | else | |
674 | { | |
675 | len = 0; | |
676 | } | |
2bd29df9 AB |
677 | } |
678 | ||
cf430c1a SA |
679 | if (len) |
680 | memcpy(certfp, digest, len); | |
03469187 SA |
681 | return len; |
682 | } | |
683 | ||
684 | int | |
685 | rb_get_ssl_certfp(rb_fde_t *F, uint8_t certfp[RB_SSL_CERTFP_LEN], int method) | |
686 | { | |
687 | gnutls_x509_crt_t cert; | |
688 | unsigned int cert_list_size; | |
689 | const gnutls_datum_t *cert_list; | |
690 | int len; | |
691 | ||
692 | if (gnutls_certificate_type_get(SSL_P(F)) != GNUTLS_CRT_X509) | |
693 | return 0; | |
694 | ||
695 | if (gnutls_x509_crt_init(&cert) < 0) | |
696 | return 0; | |
697 | ||
698 | cert_list_size = 0; | |
699 | cert_list = gnutls_certificate_get_peers(SSL_P(F), &cert_list_size); | |
700 | if (cert_list == NULL) | |
701 | { | |
702 | gnutls_x509_crt_deinit(cert); | |
703 | return 0; | |
704 | } | |
705 | ||
706 | if (gnutls_x509_crt_import(cert, &cert_list[0], GNUTLS_X509_FMT_DER) < 0) | |
707 | { | |
708 | gnutls_x509_crt_deinit(cert); | |
709 | return 0; | |
710 | } | |
711 | ||
712 | len = make_certfp(cert, certfp, method); | |
713 | gnutls_x509_crt_deinit(cert); | |
714 | return len; | |
715 | } | |
716 | ||
717 | int | |
718 | rb_get_ssl_certfp_file(const char *filename, uint8_t certfp[RB_SSL_CERTFP_LEN], int method) | |
719 | { | |
720 | gnutls_x509_crt_t cert; | |
721 | gnutls_datum_t *d_cert; | |
722 | unsigned int len; | |
723 | ||
724 | if ((d_cert = rb_load_file_into_datum_t(filename)) == NULL) | |
725 | return -1; | |
726 | ||
727 | if (gnutls_x509_crt_init(&cert) < 0) | |
728 | return -1; | |
729 | ||
730 | if (gnutls_x509_crt_import(cert, d_cert, GNUTLS_X509_FMT_PEM) != 0) | |
731 | return -1; | |
2bd29df9 | 732 | |
03469187 | 733 | len = make_certfp(cert, certfp, method); |
2bd29df9 | 734 | gnutls_x509_crt_deinit(cert); |
e6bbb410 | 735 | return len; |
2bd29df9 AB |
736 | } |
737 | ||
738 | int | |
739 | rb_supports_ssl(void) | |
740 | { | |
741 | return 1; | |
742 | } | |
743 | ||
744 | void | |
745 | rb_get_ssl_info(char *buf, size_t len) | |
746 | { | |
5203cba5 | 747 | snprintf(buf, len, "GNUTLS: compiled (%s), library(%s)", |
2bd29df9 AB |
748 | LIBGNUTLS_VERSION, gnutls_check_version(NULL)); |
749 | } | |
55abcbb2 | 750 | |
833b2f9c AC |
751 | const char * |
752 | rb_ssl_get_cipher(rb_fde_t *F) | |
753 | { | |
754 | static char buf[1024]; | |
755 | ||
5203cba5 | 756 | snprintf(buf, sizeof(buf), "%s-%s-%s-%s", |
833b2f9c AC |
757 | gnutls_protocol_get_name(gnutls_protocol_get_version(SSL_P(F))), |
758 | gnutls_kx_get_name(gnutls_kx_get(SSL_P(F))), | |
759 | gnutls_cipher_get_name(gnutls_cipher_get(SSL_P(F))), | |
760 | gnutls_mac_get_name(gnutls_mac_get(SSL_P(F)))); | |
761 | ||
762 | return buf; | |
763 | } | |
55abcbb2 | 764 | |
2bd29df9 | 765 | #endif /* HAVE_GNUTLS */ |