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Commit | Line | Data |
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2bd29df9 | 1 | /* |
56fbe141 | 2 | * libratbox: a library used by ircd-ratbox 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> | |
56fbe141 AJ |
27 | |
28 | #ifdef HAVE_GNUTLS | |
29 | ||
2bd29df9 AB |
30 | #include <commio-int.h> |
31 | #include <commio-ssl.h> | |
cf430c1a | 32 | #include <stdbool.h> |
2bd29df9 AB |
33 | |
34 | #include <gnutls/gnutls.h> | |
cf430c1a | 35 | #include <gnutls/abstract.h> |
56fbe141 | 36 | #include <gnutls/x509.h> |
7aa40f6d | 37 | |
c56f5979 | 38 | #if (GNUTLS_VERSION_MAJOR < 3) |
7aa40f6d | 39 | # include <gcrypt.h> |
c56f5979 VI |
40 | #else |
41 | # include <gnutls/crypto.h> | |
7aa40f6d | 42 | #endif |
2bd29df9 | 43 | |
56fbe141 AJ |
44 | typedef enum |
45 | { | |
46 | RB_FD_TLS_DIRECTION_IN = 0, | |
47 | RB_FD_TLS_DIRECTION_OUT = 1 | |
48 | } rb_fd_tls_direction; | |
2bd29df9 | 49 | |
56fbe141 AJ |
50 | #define SSL_P(x) *((gnutls_session_t *) ((x)->ssl)) |
51 | ||
52 | ||
53 | ||
54 | // Server side variables | |
55 | static gnutls_certificate_credentials_t server_cert_key; | |
56 | static gnutls_dh_params_t server_dhp; | |
57 | ||
58 | // Client side variables | |
2bd29df9 | 59 | #define MAX_CERTS 6 |
56fbe141 AJ |
60 | static gnutls_x509_crt_t client_cert[MAX_CERTS]; |
61 | static gnutls_x509_privkey_t client_key; | |
62 | static unsigned int client_cert_count; | |
2bd29df9 | 63 | |
56fbe141 AJ |
64 | // Shared variables |
65 | static gnutls_priority_t default_priority; | |
2bd29df9 | 66 | |
2bd29df9 | 67 | |
56fbe141 AJ |
68 | |
69 | struct ssl_connect | |
2bd29df9 | 70 | { |
56fbe141 AJ |
71 | CNCB *callback; |
72 | void *data; | |
73 | int timeout; | |
74 | }; | |
2bd29df9 | 75 | |
56fbe141 AJ |
76 | static const char *rb_ssl_strerror(int); |
77 | static void rb_ssl_connect_realcb(rb_fde_t *, int, struct ssl_connect *); | |
78 | ||
56fbe141 AJ |
79 | |
80 | ||
81 | /* | |
82 | * Internal GNUTLS-specific code | |
83 | */ | |
84 | ||
85 | /* | |
86 | * We only have one certificate to authenticate with, as both a client and server. | |
87 | * | |
88 | * Unfortunately, GNUTLS tries to be clever, and as client, will attempt to use a certificate that the server will | |
89 | * trust. We usually use self-signed certs, though, so the result of this search is always nothing. Therefore, it | |
90 | * uses no certificate to authenticate as a client. This is undesirable, as it breaks fingerprint authentication; | |
91 | * e.g. the connect::fingerprint on the remote ircd will not match. | |
92 | * | |
93 | * Thus, we use this callback to force GNUTLS to authenticate with our (server) certificate as a client. | |
94 | */ | |
95 | static int | |
96 | rb_ssl_cert_auth_cb(gnutls_session_t session, | |
97 | const gnutls_datum_t *const req_ca_rdn, const int req_ca_rdn_len, | |
98 | const gnutls_pk_algorithm_t *const sign_algos, const int sign_algos_len, | |
99 | #if (GNUTLS_VERSION_MAJOR < 3) | |
100 | gnutls_retr_st *const st) | |
101 | #else | |
102 | gnutls_retr2_st *const st) | |
103 | #endif | |
2bd29df9 | 104 | { |
56fbe141 AJ |
105 | #if (GNUTLS_VERSION_MAJOR < 3) |
106 | st->type = GNUTLS_CRT_X509; | |
107 | #else | |
108 | st->cert_type = GNUTLS_CRT_X509; | |
109 | st->key_type = GNUTLS_PRIVKEY_X509; | |
110 | #endif | |
111 | ||
112 | st->ncerts = client_cert_count; | |
113 | st->cert.x509 = client_cert; | |
114 | st->key.x509 = client_key; | |
115 | st->deinit_all = 0; | |
116 | ||
117 | return 0; | |
2bd29df9 AB |
118 | } |
119 | ||
05281d7a AJ |
120 | static ssize_t |
121 | rb_sock_net_recv(gnutls_transport_ptr_t context_ptr, void *const buf, const size_t count) | |
122 | { | |
123 | const int fd = rb_get_fd((rb_fde_t *)context_ptr); | |
124 | ||
125 | return recv(fd, buf, count, 0); | |
126 | } | |
127 | ||
128 | static ssize_t | |
129 | rb_sock_net_xmit(gnutls_transport_ptr_t context_ptr, const void *const buf, const size_t count) | |
130 | { | |
131 | const int fd = rb_get_fd((rb_fde_t *)context_ptr); | |
132 | ||
133 | return send(fd, buf, count, 0); | |
134 | } | |
135 | ||
2bd29df9 | 136 | static void |
56fbe141 | 137 | rb_ssl_init_fd(rb_fde_t *const F, const rb_fd_tls_direction dir) |
2bd29df9 | 138 | { |
56fbe141 | 139 | F->ssl = rb_malloc(sizeof(gnutls_session_t)); |
2bd29df9 | 140 | |
56fbe141 AJ |
141 | if(F->ssl == NULL) |
142 | { | |
143 | rb_lib_log("%s: rb_malloc: allocation failure", __func__); | |
144 | rb_close(F); | |
145 | return; | |
146 | } | |
2bd29df9 | 147 | |
56fbe141 | 148 | unsigned int init_flags = 0; |
2bd29df9 | 149 | |
56fbe141 | 150 | switch(dir) |
2bd29df9 | 151 | { |
56fbe141 AJ |
152 | case RB_FD_TLS_DIRECTION_IN: |
153 | init_flags |= GNUTLS_SERVER; | |
154 | break; | |
155 | case RB_FD_TLS_DIRECTION_OUT: | |
156 | init_flags |= GNUTLS_CLIENT; | |
157 | break; | |
2bd29df9 | 158 | } |
56fbe141 AJ |
159 | |
160 | gnutls_init((gnutls_session_t *) F->ssl, init_flags); | |
161 | gnutls_set_default_priority(SSL_P(F)); | |
162 | gnutls_credentials_set(SSL_P(F), GNUTLS_CRD_CERTIFICATE, server_cert_key); | |
163 | gnutls_dh_set_prime_bits(SSL_P(F), 2048); | |
164 | gnutls_priority_set(SSL_P(F), default_priority); | |
165 | ||
166 | gnutls_transport_set_ptr(SSL_P(F), (gnutls_transport_ptr_t) F); | |
167 | gnutls_transport_set_pull_function(SSL_P(F), rb_sock_net_recv); | |
168 | gnutls_transport_set_push_function(SSL_P(F), rb_sock_net_xmit); | |
169 | ||
170 | if(dir == RB_FD_TLS_DIRECTION_IN) | |
171 | gnutls_certificate_server_set_request(SSL_P(F), GNUTLS_CERT_REQUEST); | |
2bd29df9 AB |
172 | } |
173 | ||
174 | static void | |
56fbe141 | 175 | rb_ssl_accept_common(rb_fde_t *const F, void *const data) |
2bd29df9 | 176 | { |
56fbe141 | 177 | lrb_assert(F != NULL); |
2bd29df9 | 178 | lrb_assert(F->accept != NULL); |
56fbe141 AJ |
179 | lrb_assert(F->accept->callback != NULL); |
180 | lrb_assert(F->ssl != NULL); | |
2bd29df9 | 181 | |
56fbe141 | 182 | errno = 0; |
2bd29df9 | 183 | |
56fbe141 AJ |
184 | const int ret = gnutls_handshake(SSL_P(F)); |
185 | const int err = errno; | |
186 | ||
187 | if(ret == GNUTLS_E_AGAIN || (ret == GNUTLS_E_INTERRUPTED && (err == 0 || rb_ignore_errno(err)))) | |
188 | { | |
189 | unsigned int flags = (gnutls_record_get_direction(SSL_P(F)) == 0) ? RB_SELECT_READ : RB_SELECT_WRITE; | |
190 | rb_setselect(F, flags, rb_ssl_accept_common, data); | |
2bd29df9 | 191 | return; |
56fbe141 | 192 | } |
2bd29df9 | 193 | |
56fbe141 | 194 | // These 2 calls may affect errno, which is why we save it above and restore it below |
2bd29df9 AB |
195 | rb_settimeout(F, 0, NULL, NULL); |
196 | rb_setselect(F, RB_SELECT_READ | RB_SELECT_WRITE, NULL, NULL); | |
55abcbb2 | 197 | |
56fbe141 AJ |
198 | struct acceptdata *const ad = F->accept; |
199 | F->accept = NULL; | |
200 | ||
201 | if(ret == GNUTLS_E_SUCCESS) | |
202 | { | |
203 | F->handshake_count++; | |
2bd29df9 | 204 | ad->callback(F, RB_OK, (struct sockaddr *)&ad->S, ad->addrlen, ad->data); |
56fbe141 AJ |
205 | } |
206 | else if(ret == GNUTLS_E_INTERRUPTED && err != 0) | |
207 | { | |
208 | errno = err; | |
209 | ad->callback(F, RB_ERROR, NULL, 0, ad->data); | |
210 | } | |
2bd29df9 | 211 | else |
56fbe141 AJ |
212 | { |
213 | errno = EIO; | |
214 | F->ssl_errno = (unsigned long) -ret; | |
2bd29df9 | 215 | ad->callback(F, RB_ERROR_SSL, NULL, 0, ad->data); |
56fbe141 | 216 | } |
2bd29df9 AB |
217 | |
218 | rb_free(ad); | |
219 | } | |
220 | ||
56fbe141 AJ |
221 | static void |
222 | rb_ssl_connect_common(rb_fde_t *const F, void *const data) | |
2bd29df9 | 223 | { |
56fbe141 AJ |
224 | lrb_assert(F != NULL); |
225 | lrb_assert(F->ssl != NULL); | |
2bd29df9 | 226 | |
56fbe141 | 227 | errno = 0; |
2bd29df9 | 228 | |
56fbe141 AJ |
229 | const int ret = gnutls_handshake(SSL_P(F)); |
230 | const int err = errno; | |
2bd29df9 | 231 | |
56fbe141 | 232 | if(ret == GNUTLS_E_AGAIN || (ret == GNUTLS_E_INTERRUPTED && (err == 0 || rb_ignore_errno(err)))) |
2bd29df9 | 233 | { |
56fbe141 AJ |
234 | unsigned int flags = (gnutls_record_get_direction(SSL_P(F)) == 0) ? RB_SELECT_READ : RB_SELECT_WRITE; |
235 | rb_setselect(F, flags, rb_ssl_connect_common, data); | |
236 | return; | |
2bd29df9 AB |
237 | } |
238 | ||
56fbe141 AJ |
239 | // These 2 calls may affect errno, which is why we save it above and restore it below |
240 | rb_settimeout(F, 0, NULL, NULL); | |
241 | rb_setselect(F, RB_SELECT_READ | RB_SELECT_WRITE, NULL, NULL); | |
2bd29df9 | 242 | |
56fbe141 | 243 | struct ssl_connect *const sconn = data; |
673ec98e | 244 | |
56fbe141 | 245 | if(ret == GNUTLS_E_SUCCESS) |
2bd29df9 | 246 | { |
56fbe141 AJ |
247 | F->handshake_count++; |
248 | rb_ssl_connect_realcb(F, RB_OK, sconn); | |
249 | } | |
250 | else if(ret == GNUTLS_E_INTERRUPTED && err != 0) | |
251 | { | |
252 | errno = err; | |
253 | rb_ssl_connect_realcb(F, RB_ERROR, sconn); | |
254 | } | |
255 | else | |
256 | { | |
257 | errno = EIO; | |
258 | F->ssl_errno = (unsigned long) -ret; | |
259 | rb_ssl_connect_realcb(F, RB_ERROR_SSL, sconn); | |
2bd29df9 AB |
260 | } |
261 | } | |
262 | ||
56fbe141 AJ |
263 | static const char * |
264 | rb_ssl_strerror(const int err) | |
265 | { | |
266 | return gnutls_strerror(err); | |
267 | } | |
2bd29df9 AB |
268 | |
269 | static ssize_t | |
56fbe141 | 270 | rb_ssl_read_or_write(const int r_or_w, rb_fde_t *const F, void *const rbuf, const void *const wbuf, const size_t count) |
2bd29df9 AB |
271 | { |
272 | ssize_t ret; | |
56fbe141 AJ |
273 | |
274 | errno = 0; | |
2bd29df9 AB |
275 | |
276 | if(r_or_w == 0) | |
56fbe141 | 277 | ret = gnutls_record_recv(SSL_P(F), rbuf, count); |
2bd29df9 | 278 | else |
56fbe141 | 279 | ret = gnutls_record_send(SSL_P(F), wbuf, count); |
2bd29df9 | 280 | |
56fbe141 AJ |
281 | if(ret >= 0) |
282 | return ret; | |
283 | ||
284 | if(ret == GNUTLS_E_AGAIN || (ret == GNUTLS_E_INTERRUPTED && (errno == 0 || rb_ignore_errno(errno)))) | |
2bd29df9 | 285 | { |
56fbe141 AJ |
286 | if(gnutls_record_get_direction(SSL_P(F)) == 0) |
287 | return RB_RW_SSL_NEED_READ; | |
288 | else | |
289 | return RB_RW_SSL_NEED_WRITE; | |
2bd29df9 | 290 | } |
2bd29df9 | 291 | |
56fbe141 AJ |
292 | if(ret == GNUTLS_E_INTERRUPTED && errno != 0) |
293 | return RB_RW_IO_ERROR; | |
2bd29df9 | 294 | |
56fbe141 AJ |
295 | errno = EIO; |
296 | F->ssl_errno = (unsigned long) -ret; | |
297 | return RB_RW_SSL_ERROR; | |
2bd29df9 AB |
298 | } |
299 | ||
c56f5979 | 300 | #if (GNUTLS_VERSION_MAJOR < 3) |
2bd29df9 | 301 | static void |
56fbe141 | 302 | rb_gcry_random_seed(void *const unused) |
2bd29df9 AB |
303 | { |
304 | gcry_fast_random_poll(); | |
305 | } | |
c56f5979 | 306 | #endif |
2bd29df9 | 307 | |
56fbe141 AJ |
308 | static void |
309 | rb_free_datum_t(gnutls_datum_t *const datum) | |
2bd29df9 | 310 | { |
56fbe141 AJ |
311 | if(datum == NULL) |
312 | return; | |
c56f5979 | 313 | |
56fbe141 AJ |
314 | rb_free(datum->data); |
315 | rb_free(datum); | |
2bd29df9 AB |
316 | } |
317 | ||
56fbe141 AJ |
318 | static gnutls_datum_t * |
319 | rb_load_file_into_datum_t(const char *const file) | |
2bd29df9 | 320 | { |
56fbe141 AJ |
321 | const int datum_fd = open(file, O_RDONLY); |
322 | if(datum_fd < 0) | |
323 | return NULL; | |
2bd29df9 | 324 | |
56fbe141 AJ |
325 | struct stat fileinfo; |
326 | if(fstat(datum_fd, &fileinfo) != 0) | |
327 | { | |
328 | (void) close(datum_fd); | |
329 | return NULL; | |
330 | } | |
2bd29df9 | 331 | |
56fbe141 AJ |
332 | const size_t datum_size = (fileinfo.st_size < 131072) ? (size_t) fileinfo.st_size : 131072; |
333 | if(datum_size == 0) | |
334 | { | |
335 | (void) close(datum_fd); | |
336 | return NULL; | |
337 | } | |
2bd29df9 | 338 | |
2bd29df9 | 339 | gnutls_datum_t *datum; |
56fbe141 AJ |
340 | if((datum = rb_malloc(sizeof *datum)) == NULL) |
341 | { | |
342 | (void) close(datum_fd); | |
2bd29df9 | 343 | return NULL; |
56fbe141 AJ |
344 | } |
345 | if((datum->data = rb_malloc(datum_size + 1)) == NULL) | |
346 | { | |
347 | rb_free(datum); | |
348 | (void) close(datum_fd); | |
2bd29df9 | 349 | return NULL; |
56fbe141 | 350 | } |
2bd29df9 | 351 | |
56fbe141 AJ |
352 | for(size_t data_read = 0; data_read < datum_size; ) |
353 | { | |
354 | ssize_t ret = read(datum_fd, ((unsigned char *)datum->data) + data_read, datum_size - data_read); | |
2bd29df9 | 355 | |
56fbe141 AJ |
356 | if(ret <= 0) |
357 | { | |
358 | rb_free_datum_t(datum); | |
359 | (void) close(datum_fd); | |
360 | return NULL; | |
361 | } | |
31646e89 | 362 | |
56fbe141 | 363 | data_read += (size_t) ret; |
31646e89 | 364 | } |
56fbe141 AJ |
365 | (void) close(datum_fd); |
366 | ||
367 | datum->data[datum_size] = '\0'; | |
368 | datum->size = (unsigned int) datum_size; | |
2bd29df9 AB |
369 | return datum; |
370 | } | |
371 | ||
56fbe141 AJ |
372 | static int |
373 | make_certfp(gnutls_x509_crt_t cert, uint8_t certfp[const RB_SSL_CERTFP_LEN], const int method) | |
2bd29df9 | 374 | { |
56fbe141 AJ |
375 | int hashlen; |
376 | gnutls_digest_algorithm_t md_type; | |
0fe9dd41 | 377 | |
56fbe141 AJ |
378 | bool spki = false; |
379 | ||
380 | switch(method) | |
2bd29df9 | 381 | { |
56fbe141 AJ |
382 | case RB_SSL_CERTFP_METH_CERT_SHA1: |
383 | hashlen = RB_SSL_CERTFP_LEN_SHA1; | |
384 | md_type = GNUTLS_DIG_SHA1; | |
385 | break; | |
386 | case RB_SSL_CERTFP_METH_SPKI_SHA256: | |
387 | spki = true; | |
388 | case RB_SSL_CERTFP_METH_CERT_SHA256: | |
389 | hashlen = RB_SSL_CERTFP_LEN_SHA256; | |
390 | md_type = GNUTLS_DIG_SHA256; | |
391 | break; | |
392 | case RB_SSL_CERTFP_METH_SPKI_SHA512: | |
393 | spki = true; | |
394 | case RB_SSL_CERTFP_METH_CERT_SHA512: | |
395 | hashlen = RB_SSL_CERTFP_LEN_SHA512; | |
396 | md_type = GNUTLS_DIG_SHA512; | |
397 | break; | |
398 | default: | |
2bd29df9 AB |
399 | return 0; |
400 | } | |
401 | ||
56fbe141 | 402 | if(! spki) |
2bd29df9 | 403 | { |
56fbe141 AJ |
404 | size_t digest_size = (size_t) hashlen; |
405 | ||
406 | if(gnutls_x509_crt_get_fingerprint(cert, md_type, certfp, &digest_size) != 0) | |
407 | return 0; | |
408 | ||
409 | return hashlen; | |
2bd29df9 AB |
410 | } |
411 | ||
56fbe141 AJ |
412 | gnutls_pubkey_t pubkey; |
413 | ||
414 | if(gnutls_pubkey_init(&pubkey) != 0) | |
2bd29df9 | 415 | return 0; |
2bd29df9 | 416 | |
56fbe141 | 417 | if(gnutls_pubkey_import_x509(pubkey, cert, 0) != 0) |
2bd29df9 | 418 | { |
56fbe141 | 419 | gnutls_pubkey_deinit(pubkey); |
2bd29df9 AB |
420 | return 0; |
421 | } | |
422 | ||
56fbe141 AJ |
423 | unsigned char derkey[262144]; // Should be big enough to hold any SubjectPublicKeyInfo structure |
424 | size_t derkey_len = sizeof derkey; | |
425 | ||
426 | if(gnutls_pubkey_export(pubkey, GNUTLS_X509_FMT_DER, derkey, &derkey_len) != 0) | |
2bd29df9 | 427 | { |
56fbe141 | 428 | gnutls_pubkey_deinit(pubkey); |
2bd29df9 AB |
429 | return 0; |
430 | } | |
2bd29df9 | 431 | |
56fbe141 AJ |
432 | gnutls_pubkey_deinit(pubkey); |
433 | ||
434 | if(gnutls_hash_fast(md_type, derkey, derkey_len, certfp) != 0) | |
2bd29df9 | 435 | return 0; |
2bd29df9 | 436 | |
56fbe141 AJ |
437 | return hashlen; |
438 | } | |
2bd29df9 | 439 | |
c1725bda | 440 | |
56fbe141 AJ |
441 | |
442 | /* | |
443 | * External GNUTLS-specific code | |
444 | */ | |
445 | ||
446 | void | |
447 | rb_ssl_shutdown(rb_fde_t *const F) | |
448 | { | |
449 | if(F == NULL || F->ssl == NULL) | |
450 | return; | |
451 | ||
452 | for(int i = 0; i < 4; i++) | |
673ec98e | 453 | { |
56fbe141 AJ |
454 | int ret = gnutls_bye(SSL_P(F), GNUTLS_SHUT_RDWR); |
455 | ||
456 | if(ret != GNUTLS_E_INTERRUPTED && ret != GNUTLS_E_AGAIN) | |
457 | break; | |
673ec98e AC |
458 | } |
459 | ||
56fbe141 AJ |
460 | gnutls_deinit(SSL_P(F)); |
461 | ||
462 | rb_free(F->ssl); | |
463 | F->ssl = NULL; | |
2bd29df9 AB |
464 | } |
465 | ||
466 | int | |
56fbe141 | 467 | rb_init_ssl(void) |
2bd29df9 | 468 | { |
56fbe141 | 469 | int ret; |
2bd29df9 | 470 | |
56fbe141 AJ |
471 | if((ret = gnutls_global_init()) != GNUTLS_E_SUCCESS) |
472 | { | |
473 | rb_lib_log("%s: gnutls_global_init: %s", __func__, rb_ssl_strerror(ret)); | |
474 | return 0; | |
475 | } | |
2bd29df9 | 476 | |
56fbe141 AJ |
477 | #if (GNUTLS_VERSION_MAJOR < 3) |
478 | rb_event_addish("rb_gcry_random_seed", rb_gcry_random_seed, NULL, 300); | |
479 | #endif | |
2bd29df9 | 480 | |
56fbe141 | 481 | return 1; |
2bd29df9 AB |
482 | } |
483 | ||
56fbe141 AJ |
484 | int |
485 | rb_setup_ssl_server(const char *const certfile, const char *keyfile, | |
486 | const char *const dhfile, const char *const cipherlist) | |
2bd29df9 | 487 | { |
56fbe141 AJ |
488 | if(certfile == NULL) |
489 | { | |
490 | rb_lib_log("%s: no certificate file specified", __func__); | |
491 | return 0; | |
492 | } | |
2bd29df9 | 493 | |
56fbe141 AJ |
494 | if(keyfile == NULL) |
495 | keyfile = certfile; | |
2bd29df9 | 496 | |
2bd29df9 | 497 | |
56fbe141 AJ |
498 | gnutls_datum_t *const d_cert = rb_load_file_into_datum_t(certfile); |
499 | if(d_cert == NULL) | |
2bd29df9 | 500 | { |
56fbe141 AJ |
501 | rb_lib_log("%s: Error loading certificate: %s", __func__, strerror(errno)); |
502 | return 0; | |
2bd29df9 | 503 | } |
2bd29df9 | 504 | |
56fbe141 AJ |
505 | gnutls_datum_t *const d_key = rb_load_file_into_datum_t(keyfile); |
506 | if(d_key == NULL) | |
2bd29df9 | 507 | { |
56fbe141 AJ |
508 | rb_lib_log("%s: Error loading key: %s", __func__, strerror(errno)); |
509 | rb_free_datum_t(d_cert); | |
510 | return 0; | |
2bd29df9 AB |
511 | } |
512 | ||
56fbe141 | 513 | int ret; |
2bd29df9 | 514 | |
56fbe141 AJ |
515 | if((ret = gnutls_certificate_allocate_credentials(&server_cert_key)) != GNUTLS_E_SUCCESS) |
516 | { | |
517 | rb_lib_log("%s: gnutls_certificate_allocate_credentials: %s", __func__, rb_ssl_strerror(ret)); | |
518 | rb_free_datum_t(d_cert); | |
519 | rb_free_datum_t(d_key); | |
520 | return 0; | |
521 | } | |
2bd29df9 | 522 | |
56fbe141 AJ |
523 | #if (GNUTLS_VERSION_MAJOR < 3) |
524 | gnutls_certificate_client_set_retrieve_function(server_cert_key, rb_ssl_cert_auth_cb); | |
525 | #else | |
526 | gnutls_certificate_set_retrieve_function(server_cert_key, rb_ssl_cert_auth_cb); | |
527 | #endif | |
2bd29df9 | 528 | |
56fbe141 AJ |
529 | if((ret = gnutls_certificate_set_x509_key_mem(server_cert_key, d_cert, d_key, |
530 | GNUTLS_X509_FMT_PEM)) != GNUTLS_E_SUCCESS) | |
531 | { | |
532 | rb_lib_log("%s: gnutls_certificate_set_x509_key_mem: %s", __func__, rb_ssl_strerror(ret)); | |
533 | gnutls_certificate_free_credentials(server_cert_key); | |
534 | rb_free_datum_t(d_cert); | |
535 | rb_free_datum_t(d_key); | |
536 | return 0; | |
537 | } | |
538 | if((ret = gnutls_x509_crt_list_import(client_cert, &client_cert_count, d_cert, GNUTLS_X509_FMT_PEM, | |
539 | GNUTLS_X509_CRT_LIST_IMPORT_FAIL_IF_EXCEED)) < 1) | |
540 | { | |
541 | rb_lib_log("%s: gnutls_x509_crt_list_import: %s", __func__, rb_ssl_strerror(ret)); | |
542 | gnutls_certificate_free_credentials(server_cert_key); | |
543 | rb_free_datum_t(d_cert); | |
544 | rb_free_datum_t(d_key); | |
545 | return 0; | |
546 | } | |
547 | client_cert_count = (unsigned int) ret; | |
2bd29df9 | 548 | |
56fbe141 AJ |
549 | if((ret = gnutls_x509_privkey_init(&client_key)) != GNUTLS_E_SUCCESS) |
550 | { | |
551 | rb_lib_log("%s: gnutls_x509_privkey_init: %s", __func__, rb_ssl_strerror(ret)); | |
552 | gnutls_certificate_free_credentials(server_cert_key); | |
553 | for(unsigned int i = 0; i < client_cert_count; i++) | |
554 | gnutls_x509_crt_deinit(client_cert[i]); | |
555 | rb_free_datum_t(d_cert); | |
556 | rb_free_datum_t(d_key); | |
557 | return 0; | |
558 | } | |
559 | if((ret = gnutls_x509_privkey_import(client_key, d_key, GNUTLS_X509_FMT_PEM)) != GNUTLS_E_SUCCESS) | |
560 | { | |
561 | rb_lib_log("%s: gnutls_x509_privkey_import: %s", __func__, rb_ssl_strerror(ret)); | |
562 | gnutls_certificate_free_credentials(server_cert_key); | |
563 | for(unsigned int i = 0; i < client_cert_count; i++) | |
564 | gnutls_x509_crt_deinit(client_cert[i]); | |
565 | gnutls_x509_privkey_deinit(client_key); | |
566 | rb_free_datum_t(d_cert); | |
567 | rb_free_datum_t(d_key); | |
568 | return 0; | |
569 | } | |
2bd29df9 | 570 | |
56fbe141 AJ |
571 | rb_free_datum_t(d_cert); |
572 | rb_free_datum_t(d_key); | |
2bd29df9 | 573 | |
56fbe141 AJ |
574 | if(dhfile != NULL) |
575 | { | |
576 | gnutls_datum_t *const d_dhp = rb_load_file_into_datum_t(dhfile); | |
2bd29df9 | 577 | |
56fbe141 AJ |
578 | if(d_dhp == NULL) |
579 | { | |
580 | rb_lib_log("%s: Error parsing DH parameters: %s", __func__, strerror(errno)); | |
581 | gnutls_certificate_free_credentials(server_cert_key); | |
582 | for(unsigned int i = 0; i < client_cert_count; i++) | |
583 | gnutls_x509_crt_deinit(client_cert[i]); | |
584 | gnutls_x509_privkey_deinit(client_key); | |
585 | return 0; | |
586 | } | |
587 | if((ret = gnutls_dh_params_init(&server_dhp)) != GNUTLS_E_SUCCESS) | |
588 | { | |
589 | rb_lib_log("%s: Error parsing DH parameters: %s", __func__, rb_ssl_strerror(ret)); | |
590 | gnutls_certificate_free_credentials(server_cert_key); | |
591 | for(unsigned int i = 0; i < client_cert_count; i++) | |
592 | gnutls_x509_crt_deinit(client_cert[i]); | |
593 | gnutls_x509_privkey_deinit(client_key); | |
594 | rb_free_datum_t(d_dhp); | |
595 | return 0; | |
596 | } | |
597 | if((ret = gnutls_dh_params_import_pkcs3(server_dhp, d_dhp, GNUTLS_X509_FMT_PEM)) != GNUTLS_E_SUCCESS) | |
598 | { | |
599 | rb_lib_log("%s: Error parsing DH parameters: %s", __func__, rb_ssl_strerror(ret)); | |
600 | gnutls_certificate_free_credentials(server_cert_key); | |
601 | for(unsigned int i = 0; i < client_cert_count; i++) | |
602 | gnutls_x509_crt_deinit(client_cert[i]); | |
603 | gnutls_x509_privkey_deinit(client_key); | |
604 | gnutls_dh_params_deinit(server_dhp); | |
605 | rb_free_datum_t(d_dhp); | |
606 | return 0; | |
607 | } | |
2bd29df9 | 608 | |
56fbe141 AJ |
609 | gnutls_certificate_set_dh_params(server_cert_key, server_dhp); |
610 | rb_free_datum_t(d_dhp); | |
611 | } | |
2bd29df9 | 612 | |
56fbe141 AJ |
613 | const char *err = NULL; |
614 | if((ret = gnutls_priority_init(&default_priority, cipherlist, &err)) != GNUTLS_E_SUCCESS) | |
615 | { | |
616 | rb_lib_log("%s: gnutls_priority_init: %s, error begins at '%s'? -- using defaults instead", | |
617 | __func__, rb_ssl_strerror(ret), err ? err : "<unknown>"); | |
2bd29df9 | 618 | |
56fbe141 AJ |
619 | (void) gnutls_priority_init(&default_priority, NULL, &err); |
620 | } | |
2bd29df9 | 621 | |
56fbe141 AJ |
622 | rb_lib_log("%s: TLS configuration successful", __func__); |
623 | return 1; | |
2bd29df9 AB |
624 | } |
625 | ||
626 | int | |
56fbe141 | 627 | rb_init_prng(const char *const path, prng_seed_t seed_type) |
2bd29df9 | 628 | { |
56fbe141 | 629 | #if (GNUTLS_VERSION_MAJOR < 3) |
2bd29df9 | 630 | gcry_fast_random_poll(); |
56fbe141 AJ |
631 | rb_lib_log("%s: PRNG initialised", __func__); |
632 | #else | |
633 | rb_lib_log("%s: Skipping PRNG initialisation; not required by GNUTLS v3+ backend", __func__); | |
7aa40f6d | 634 | #endif |
2bd29df9 AB |
635 | return 1; |
636 | } | |
637 | ||
638 | int | |
56fbe141 | 639 | rb_get_random(void *const buf, const size_t length) |
2bd29df9 | 640 | { |
56fbe141 | 641 | #if (GNUTLS_VERSION_MAJOR < 3) |
2bd29df9 | 642 | gcry_randomize(buf, length, GCRY_STRONG_RANDOM); |
7aa40f6d AC |
643 | #else |
644 | gnutls_rnd(GNUTLS_RND_KEY, buf, length); | |
645 | #endif | |
2bd29df9 AB |
646 | return 1; |
647 | } | |
648 | ||
2bd29df9 | 649 | const char * |
56fbe141 | 650 | rb_get_ssl_strerror(rb_fde_t *const F) |
2bd29df9 | 651 | { |
56fbe141 AJ |
652 | const int err = (int) F->ssl_errno; |
653 | return rb_ssl_strerror(-err); | |
2bd29df9 AB |
654 | } |
655 | ||
56fbe141 AJ |
656 | int |
657 | rb_get_ssl_certfp(rb_fde_t *const F, uint8_t certfp[const RB_SSL_CERTFP_LEN], const int method) | |
2bd29df9 | 658 | { |
56fbe141 AJ |
659 | if(gnutls_certificate_type_get(SSL_P(F)) != GNUTLS_CRT_X509) |
660 | return 0; | |
2bd29df9 | 661 | |
56fbe141 AJ |
662 | unsigned int cert_list_size = 0; |
663 | const gnutls_datum_t *const cert_list = gnutls_certificate_get_peers(SSL_P(F), &cert_list_size); | |
664 | if(cert_list == NULL || cert_list_size < 1) | |
665 | return 0; | |
666 | ||
667 | gnutls_x509_crt_t peer_cert; | |
668 | if(gnutls_x509_crt_init(&peer_cert) != 0) | |
e6bbb410 | 669 | return 0; |
e6bbb410 | 670 | |
56fbe141 | 671 | if(gnutls_x509_crt_import(peer_cert, &cert_list[0], GNUTLS_X509_FMT_DER) < 0) |
2bd29df9 | 672 | { |
56fbe141 AJ |
673 | gnutls_x509_crt_deinit(peer_cert); |
674 | return 0; | |
cf430c1a | 675 | } |
cf430c1a | 676 | |
56fbe141 | 677 | const int len = make_certfp(peer_cert, certfp, method); |
cf430c1a | 678 | |
56fbe141 | 679 | gnutls_x509_crt_deinit(peer_cert); |
2bd29df9 | 680 | |
03469187 SA |
681 | return len; |
682 | } | |
683 | ||
684 | int | |
56fbe141 | 685 | rb_get_ssl_certfp_file(const char *const filename, uint8_t certfp[const RB_SSL_CERTFP_LEN], const int method) |
03469187 | 686 | { |
56fbe141 AJ |
687 | gnutls_datum_t *const datum_cert = rb_load_file_into_datum_t(filename); |
688 | if(datum_cert == NULL) | |
689 | return -1; | |
03469187 | 690 | |
56fbe141 AJ |
691 | gnutls_x509_crt_t cert; |
692 | if(gnutls_x509_crt_init(&cert) != 0) | |
03469187 | 693 | { |
56fbe141 | 694 | rb_free_datum_t(datum_cert); |
03469187 SA |
695 | return 0; |
696 | } | |
56fbe141 | 697 | if(gnutls_x509_crt_import(cert, datum_cert, GNUTLS_X509_FMT_PEM) < 0) |
03469187 SA |
698 | { |
699 | gnutls_x509_crt_deinit(cert); | |
56fbe141 | 700 | rb_free_datum_t(datum_cert); |
03469187 SA |
701 | return 0; |
702 | } | |
703 | ||
56fbe141 AJ |
704 | const int len = make_certfp(cert, certfp, method); |
705 | ||
03469187 | 706 | gnutls_x509_crt_deinit(cert); |
56fbe141 AJ |
707 | rb_free_datum_t(datum_cert); |
708 | ||
03469187 SA |
709 | return len; |
710 | } | |
711 | ||
56fbe141 AJ |
712 | void |
713 | rb_get_ssl_info(char *const buf, const size_t len) | |
03469187 | 714 | { |
56fbe141 AJ |
715 | (void) snprintf(buf, len, "GNUTLS: compiled (v%s), library (v%s)", |
716 | LIBGNUTLS_VERSION, gnutls_check_version(NULL)); | |
717 | } | |
03469187 | 718 | |
56fbe141 AJ |
719 | const char * |
720 | rb_ssl_get_cipher(rb_fde_t *const F) | |
721 | { | |
722 | if(F == NULL || F->ssl == NULL) | |
723 | return NULL; | |
03469187 | 724 | |
56fbe141 | 725 | static char buf[512]; |
03469187 | 726 | |
56fbe141 AJ |
727 | gnutls_protocol_t version_ptr = gnutls_protocol_get_version(SSL_P(F)); |
728 | gnutls_cipher_algorithm_t cipher_ptr = gnutls_cipher_get(SSL_P(F)); | |
2bd29df9 | 729 | |
56fbe141 AJ |
730 | const char *const version = gnutls_protocol_get_name(version_ptr); |
731 | const char *const cipher = gnutls_cipher_get_name(cipher_ptr); | |
732 | ||
733 | (void) snprintf(buf, sizeof buf, "%s, %s", version, cipher); | |
734 | ||
735 | return buf; | |
736 | } | |
737 | ||
738 | ssize_t | |
739 | rb_ssl_read(rb_fde_t *const F, void *const buf, const size_t count) | |
740 | { | |
741 | return rb_ssl_read_or_write(0, F, buf, NULL, count); | |
742 | } | |
743 | ||
744 | ssize_t | |
745 | rb_ssl_write(rb_fde_t *const F, const void *const buf, const size_t count) | |
746 | { | |
747 | return rb_ssl_read_or_write(1, F, NULL, buf, count); | |
2bd29df9 AB |
748 | } |
749 | ||
56fbe141 AJ |
750 | |
751 | ||
752 | /* | |
753 | * Internal library-agnostic code | |
754 | */ | |
755 | ||
756 | static void | |
757 | rb_ssl_connect_realcb(rb_fde_t *const F, const int status, struct ssl_connect *const sconn) | |
758 | { | |
759 | lrb_assert(F != NULL); | |
760 | lrb_assert(F->connect != NULL); | |
761 | ||
762 | F->connect->callback = sconn->callback; | |
763 | F->connect->data = sconn->data; | |
764 | ||
765 | rb_connect_callback(F, status); | |
766 | rb_free(sconn); | |
767 | } | |
768 | ||
769 | static void | |
770 | rb_ssl_timeout_cb(rb_fde_t *const F, void *const data) | |
771 | { | |
772 | lrb_assert(F->accept != NULL); | |
773 | lrb_assert(F->accept->callback != NULL); | |
774 | ||
775 | F->accept->callback(F, RB_ERR_TIMEOUT, NULL, 0, F->accept->data); | |
776 | } | |
777 | ||
778 | static void | |
779 | rb_ssl_tryconn_timeout_cb(rb_fde_t *const F, void *const data) | |
780 | { | |
781 | rb_ssl_connect_realcb(F, RB_ERR_TIMEOUT, data); | |
782 | } | |
783 | ||
784 | static void | |
785 | rb_ssl_tryconn(rb_fde_t *const F, const int status, void *const data) | |
786 | { | |
787 | lrb_assert(F != NULL); | |
788 | ||
789 | struct ssl_connect *const sconn = data; | |
790 | ||
791 | if(status != RB_OK) | |
792 | { | |
793 | rb_ssl_connect_realcb(F, status, sconn); | |
794 | return; | |
795 | } | |
796 | ||
797 | F->type |= RB_FD_SSL; | |
798 | ||
799 | rb_settimeout(F, sconn->timeout, rb_ssl_tryconn_timeout_cb, sconn); | |
800 | rb_ssl_init_fd(F, RB_FD_TLS_DIRECTION_OUT); | |
801 | rb_ssl_connect_common(F, sconn); | |
802 | } | |
803 | ||
56fbe141 AJ |
804 | |
805 | ||
806 | /* | |
807 | * External library-agnostic code | |
808 | */ | |
809 | ||
2bd29df9 AB |
810 | int |
811 | rb_supports_ssl(void) | |
812 | { | |
813 | return 1; | |
814 | } | |
815 | ||
56fbe141 AJ |
816 | unsigned int |
817 | rb_ssl_handshake_count(rb_fde_t *const F) | |
818 | { | |
819 | return F->handshake_count; | |
820 | } | |
821 | ||
2bd29df9 | 822 | void |
56fbe141 | 823 | rb_ssl_clear_handshake_count(rb_fde_t *const F) |
2bd29df9 | 824 | { |
56fbe141 | 825 | F->handshake_count = 0; |
2bd29df9 | 826 | } |
55abcbb2 | 827 | |
56fbe141 AJ |
828 | void |
829 | rb_ssl_start_accepted(rb_fde_t *const F, ACCB *const cb, void *const data, const int timeout) | |
833b2f9c | 830 | { |
56fbe141 | 831 | F->type |= RB_FD_SSL; |
833b2f9c | 832 | |
56fbe141 AJ |
833 | F->accept = rb_malloc(sizeof(struct acceptdata)); |
834 | F->accept->callback = cb; | |
835 | F->accept->data = data; | |
836 | F->accept->addrlen = 0; | |
837 | (void) memset(&F->accept->S, 0x00, sizeof F->accept->S); | |
49068542 | 838 | |
56fbe141 AJ |
839 | rb_settimeout(F, timeout, rb_ssl_timeout_cb, NULL); |
840 | rb_ssl_init_fd(F, RB_FD_TLS_DIRECTION_IN); | |
841 | rb_ssl_accept_common(F, NULL); | |
842 | } | |
49068542 | 843 | |
56fbe141 AJ |
844 | void |
845 | rb_ssl_accept_setup(rb_fde_t *const srv_F, rb_fde_t *const cli_F, struct sockaddr *const st, const int addrlen) | |
846 | { | |
847 | cli_F->type |= RB_FD_SSL; | |
49068542 | 848 | |
56fbe141 AJ |
849 | cli_F->accept = rb_malloc(sizeof(struct acceptdata)); |
850 | cli_F->accept->callback = srv_F->accept->callback; | |
851 | cli_F->accept->data = srv_F->accept->data; | |
852 | cli_F->accept->addrlen = (rb_socklen_t) addrlen; | |
853 | (void) memset(&cli_F->accept->S, 0x00, sizeof cli_F->accept->S); | |
854 | (void) memcpy(&cli_F->accept->S, st, (size_t) addrlen); | |
49068542 | 855 | |
56fbe141 AJ |
856 | rb_settimeout(cli_F, 10, rb_ssl_timeout_cb, NULL); |
857 | rb_ssl_init_fd(cli_F, RB_FD_TLS_DIRECTION_IN); | |
858 | rb_ssl_accept_common(cli_F, NULL); | |
859 | } | |
833b2f9c | 860 | |
56fbe141 AJ |
861 | int |
862 | rb_ssl_listen(rb_fde_t *const F, const int backlog, const int defer_accept) | |
863 | { | |
864 | int result = rb_listen(F, backlog, defer_accept); | |
865 | ||
866 | F->type = RB_FD_SOCKET | RB_FD_LISTEN | RB_FD_SSL; | |
867 | ||
868 | return result; | |
869 | } | |
870 | ||
871 | void | |
872 | rb_connect_tcp_ssl(rb_fde_t *const F, struct sockaddr *const dest, struct sockaddr *const clocal, | |
873 | CNCB *const callback, void *const data, const int timeout) | |
874 | { | |
875 | if(F == NULL) | |
876 | return; | |
877 | ||
878 | struct ssl_connect *const sconn = rb_malloc(sizeof *sconn); | |
879 | sconn->data = data; | |
880 | sconn->callback = callback; | |
881 | sconn->timeout = timeout; | |
882 | ||
883 | rb_connect_tcp(F, dest, clocal, rb_ssl_tryconn, sconn, timeout); | |
884 | } | |
885 | ||
886 | void | |
887 | rb_ssl_start_connected(rb_fde_t *const F, CNCB *const callback, void *const data, const int timeout) | |
888 | { | |
889 | if(F == NULL) | |
890 | return; | |
891 | ||
892 | struct ssl_connect *const sconn = rb_malloc(sizeof *sconn); | |
893 | sconn->data = data; | |
894 | sconn->callback = callback; | |
895 | sconn->timeout = timeout; | |
896 | ||
897 | F->connect = rb_malloc(sizeof(struct conndata)); | |
898 | F->connect->callback = callback; | |
899 | F->connect->data = data; | |
900 | ||
901 | F->type |= RB_FD_SSL; | |
902 | ||
903 | rb_settimeout(F, sconn->timeout, rb_ssl_tryconn_timeout_cb, sconn); | |
904 | rb_ssl_init_fd(F, RB_FD_TLS_DIRECTION_OUT); | |
905 | rb_ssl_connect_common(F, sconn); | |
833b2f9c | 906 | } |
55abcbb2 | 907 | |
2bd29df9 | 908 | #endif /* HAVE_GNUTLS */ |