2 * libratbox: a library used by ircd-ratbox and other things
3 * openssl.c: openssl related code
5 * Copyright (C) 2007-2008 ircd-ratbox development team
6 * Copyright (C) 2007-2008 Aaron Sethman <androsyn@ratbox.org>
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.
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.
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
23 * $Id: commio.c 24808 2008-01-02 08:17:05Z androsyn $
26 #include <libratbox_config.h>
27 #include <ratbox_lib.h>
31 #include <commio-int.h>
32 #include <commio-ssl.h>
33 #include <openssl/ssl.h>
34 #include <openssl/dh.h>
35 #include <openssl/err.h>
36 #include <openssl/rand.h>
38 static SSL_CTX
*ssl_server_ctx
;
39 static SSL_CTX
*ssl_client_ctx
;
41 static unsigned long get_last_err(void)
43 unsigned long t_err
, err
= 0;
44 err
= ERR_get_error();
48 while((t_err
= ERR_get_error()) > 0)
55 rb_ssl_shutdown(rb_fde_t
* F
)
58 if(F
== NULL
|| F
->ssl
== NULL
)
60 SSL_set_shutdown((SSL
*) F
->ssl
, SSL_RECEIVED_SHUTDOWN
);
62 for (i
= 0; i
< 4; i
++)
64 if(SSL_shutdown((SSL
*) F
->ssl
))
68 SSL_free((SSL
*) F
->ssl
);
72 rb_ssl_timeout(rb_fde_t
* fd
, void *notused
)
79 rb_ssl_tryaccept(rb_fde_t
* F
, void *data
)
82 lrb_assert(F
->accept
!= NULL
);
84 if(!SSL_is_init_finished((SSL
*) F
->ssl
))
86 if((ssl_err
= SSL_accept((SSL
*) F
->ssl
)) <= 0)
88 switch (ssl_err
= SSL_get_error((SSL
*) F
->ssl
, ssl_err
))
90 case SSL_ERROR_SYSCALL
:
91 if(rb_ignore_errno(errno
))
92 case SSL_ERROR_WANT_READ
:
93 case SSL_ERROR_WANT_WRITE
:
95 F
->ssl_errno
= get_last_err();
96 rb_setselect(F
, RB_SELECT_READ
| RB_SELECT_WRITE
,
97 rb_ssl_tryaccept
, NULL
);
101 F
->ssl_errno
= get_last_err();
102 F
->accept
->callback(F
, RB_ERROR_SSL
, NULL
, 0, F
->accept
->data
);
108 rb_settimeout(F
, 0, NULL
, NULL
);
109 rb_setselect(F
, RB_SELECT_READ
| RB_SELECT_WRITE
, NULL
, NULL
);
111 F
->accept
->callback(F
, RB_OK
, (struct sockaddr
*) &F
->accept
->S
, F
->accept
->addrlen
,
119 rb_ssl_start_accepted(rb_fde_t
* new_F
, ACCB
* cb
, void *data
, int timeout
)
123 new_F
->type
|= RB_FD_SSL
;
124 new_F
->ssl
= SSL_new(ssl_server_ctx
);
125 new_F
->accept
= rb_malloc(sizeof(struct acceptdata
));
127 new_F
->accept
->callback
= cb
;
128 new_F
->accept
->data
= data
;
129 rb_settimeout(new_F
, timeout
, rb_ssl_timeout
, NULL
);
131 new_F
->accept
->addrlen
= 0;
132 SSL_set_fd((SSL
*) new_F
->ssl
, rb_get_fd(new_F
));
133 if((ssl_err
= SSL_accept((SSL
*) new_F
->ssl
)) <= 0)
135 switch (ssl_err
= SSL_get_error((SSL
*) new_F
->ssl
, ssl_err
))
137 case SSL_ERROR_SYSCALL
:
138 if(rb_ignore_errno(errno
))
139 case SSL_ERROR_WANT_READ
:
140 case SSL_ERROR_WANT_WRITE
:
142 new_F
->ssl_errno
= get_last_err();
143 rb_setselect(new_F
, RB_SELECT_READ
| RB_SELECT_WRITE
,
144 rb_ssl_tryaccept
, NULL
);
148 new_F
->ssl_errno
= get_last_err();
149 new_F
->accept
->callback(new_F
, RB_ERROR_SSL
, NULL
, 0, new_F
->accept
->data
);
155 rb_ssl_tryaccept(new_F
, NULL
);
163 rb_ssl_accept_setup(rb_fde_t
* F
, int new_fd
, struct sockaddr
*st
, int addrlen
)
168 new_F
= rb_find_fd(new_fd
);
169 new_F
->type
|= RB_FD_SSL
;
170 new_F
->ssl
= SSL_new(ssl_server_ctx
);
171 new_F
->accept
= rb_malloc(sizeof(struct acceptdata
));
173 new_F
->accept
->callback
= F
->accept
->callback
;
174 new_F
->accept
->data
= F
->accept
->data
;
175 rb_settimeout(new_F
, 10, rb_ssl_timeout
, NULL
);
176 memcpy(&new_F
->accept
->S
, st
, addrlen
);
177 new_F
->accept
->addrlen
= addrlen
;
179 SSL_set_fd((SSL
*) new_F
->ssl
, new_fd
);
180 if((ssl_err
= SSL_accept((SSL
*) new_F
->ssl
)) <= 0)
182 switch (ssl_err
= SSL_get_error((SSL
*) new_F
->ssl
, ssl_err
))
184 case SSL_ERROR_SYSCALL
:
185 if(rb_ignore_errno(errno
))
186 case SSL_ERROR_WANT_READ
:
187 case SSL_ERROR_WANT_WRITE
:
189 F
->ssl_errno
= get_last_err();
190 rb_setselect(new_F
, RB_SELECT_READ
| RB_SELECT_WRITE
,
191 rb_ssl_tryaccept
, NULL
);
195 F
->ssl_errno
= get_last_err();
196 F
->accept
->callback(F
, RB_ERROR_SSL
, NULL
, 0, F
->accept
->data
);
202 rb_ssl_tryaccept(new_F
, NULL
);
207 rb_ssl_read_or_write(int r_or_w
, rb_fde_t
* F
, void *rbuf
, const void *wbuf
, size_t count
)
214 ret
= (ssize_t
)SSL_read(ssl
, rbuf
, (int) count
);
216 ret
= (ssize_t
)SSL_write(ssl
, wbuf
, (int) count
);
220 switch (SSL_get_error(ssl
, ret
))
222 case SSL_ERROR_WANT_READ
:
224 return RB_RW_SSL_NEED_READ
;
225 case SSL_ERROR_WANT_WRITE
:
227 return RB_RW_SSL_NEED_WRITE
;
228 case SSL_ERROR_ZERO_RETURN
:
230 case SSL_ERROR_SYSCALL
:
231 err
= get_last_err();
235 return RB_RW_IO_ERROR
;
239 err
= get_last_err();
245 errno
= EIO
; /* not great but... */
246 return RB_RW_SSL_ERROR
;
248 return RB_RW_IO_ERROR
;
254 rb_ssl_read(rb_fde_t
* F
, void *buf
, size_t count
)
256 return rb_ssl_read_or_write(0, F
, buf
, NULL
, count
);
260 rb_ssl_write(rb_fde_t
* F
, const void *buf
, size_t count
)
262 return rb_ssl_read_or_write(1, F
, NULL
, buf
, count
);
269 SSL_load_error_strings();
271 ssl_server_ctx
= SSL_CTX_new(SSLv23_server_method());
272 if(ssl_server_ctx
== NULL
)
274 rb_lib_log("rb_init_openssl: Unable to initialize OpenSSL server context: %s",
275 ERR_error_string(ERR_get_error(), NULL
));
278 /* Disable SSLv2, make the client use our settings */
279 SSL_CTX_set_options(ssl_server_ctx
, SSL_OP_NO_SSLv2
| SSL_OP_CIPHER_SERVER_PREFERENCE
);
281 ssl_client_ctx
= SSL_CTX_new(TLSv1_client_method());
283 if(ssl_client_ctx
== NULL
)
285 rb_lib_log("rb_init_openssl: Unable to initialize OpenSSL client context: %s",
286 ERR_error_string(ERR_get_error(), NULL
));
294 rb_setup_ssl_server(const char *cert
, const char *keyfile
, const char *dhfile
)
301 rb_lib_log("rb_setup_ssl_server: No certificate file");
304 if(!SSL_CTX_use_certificate_file(ssl_server_ctx
, cert
, SSL_FILETYPE_PEM
))
306 err
= ERR_get_error();
307 rb_lib_log("rb_setup_ssl_server: Error loading certificate file [%s]: %s", cert
,
308 ERR_error_string(err
, NULL
));
314 rb_lib_log("rb_setup_ssl_server: No key file");
319 if(!SSL_CTX_use_PrivateKey_file(ssl_server_ctx
, keyfile
, SSL_FILETYPE_PEM
))
321 err
= ERR_get_error();
322 rb_lib_log("rb_setup_ssl_server: Error loading keyfile [%s]: %s", keyfile
,
323 ERR_error_string(err
, NULL
));
329 /* DH parameters aren't necessary, but they are nice..if they didn't pass one..that is their problem */
330 param
= fopen(dhfile
, "r");
333 dh
= PEM_read_DHparams(param
, NULL
, NULL
, NULL
);
336 err
= ERR_get_error();
338 ("rb_setup_ssl_server: Error loading DH params file [%s]: %s",
339 param
, ERR_error_string(err
, NULL
));
343 SSL_CTX_set_tmp_dh(ssl_server_ctx
, dh
);
351 rb_ssl_listen(rb_fde_t
* F
, int backlog
)
353 F
->type
= RB_FD_SOCKET
| RB_FD_LISTEN
| RB_FD_SSL
;
354 return listen(F
->fd
, backlog
);
365 rb_ssl_connect_realcb(rb_fde_t
* F
, int status
, struct ssl_connect
*sconn
)
367 F
->connect
->callback
= sconn
->callback
;
368 F
->connect
->data
= sconn
->data
;
370 rb_connect_callback(F
, status
);
374 rb_ssl_tryconn_timeout_cb(rb_fde_t
* F
, void *data
)
376 rb_ssl_connect_realcb(F
, RB_ERR_TIMEOUT
, data
);
380 rb_ssl_tryconn_cb(rb_fde_t
* F
, void *data
)
382 struct ssl_connect
*sconn
= data
;
384 if(!SSL_is_init_finished((SSL
*) F
->ssl
))
386 if((ssl_err
= SSL_connect((SSL
*) F
->ssl
)) <= 0)
388 switch (ssl_err
= SSL_get_error((SSL
*) F
->ssl
, ssl_err
))
390 case SSL_ERROR_SYSCALL
:
391 if(rb_ignore_errno(errno
))
392 case SSL_ERROR_WANT_READ
:
393 case SSL_ERROR_WANT_WRITE
:
395 F
->ssl_errno
= get_last_err();
396 rb_setselect(F
, RB_SELECT_READ
| RB_SELECT_WRITE
,
397 rb_ssl_tryconn_cb
, sconn
);
401 F
->ssl_errno
= get_last_err();
402 rb_ssl_connect_realcb(F
, RB_ERROR_SSL
, sconn
);
408 rb_ssl_connect_realcb(F
, RB_OK
, sconn
);
414 rb_ssl_tryconn(rb_fde_t
* F
, int status
, void *data
)
416 struct ssl_connect
*sconn
= data
;
420 rb_ssl_connect_realcb(F
, status
, sconn
);
424 F
->type
|= RB_FD_SSL
;
425 F
->ssl
= SSL_new(ssl_client_ctx
);
426 SSL_set_fd((SSL
*) F
->ssl
, F
->fd
);
428 rb_settimeout(F
, sconn
->timeout
, rb_ssl_tryconn_timeout_cb
, sconn
);
429 if((ssl_err
= SSL_connect((SSL
*) F
->ssl
)) <= 0)
431 switch (ssl_err
= SSL_get_error((SSL
*) F
->ssl
, ssl_err
))
433 case SSL_ERROR_SYSCALL
:
434 if(rb_ignore_errno(errno
))
435 case SSL_ERROR_WANT_READ
:
436 case SSL_ERROR_WANT_WRITE
:
438 F
->ssl_errno
= get_last_err();
439 rb_setselect(F
, RB_SELECT_READ
| RB_SELECT_WRITE
,
440 rb_ssl_tryconn_cb
, sconn
);
444 F
->ssl_errno
= get_last_err();
445 rb_ssl_connect_realcb(F
, RB_ERROR_SSL
, sconn
);
451 rb_ssl_connect_realcb(F
, RB_OK
, sconn
);
456 rb_connect_tcp_ssl(rb_fde_t
* F
, struct sockaddr
*dest
,
457 struct sockaddr
*clocal
, int socklen
, CNCB
* callback
, void *data
, int timeout
)
459 struct ssl_connect
*sconn
;
463 sconn
= rb_malloc(sizeof(struct ssl_connect
));
465 sconn
->callback
= callback
;
466 sconn
->timeout
= timeout
;
467 rb_connect_tcp(F
, dest
, clocal
, socklen
, rb_ssl_tryconn
, sconn
, timeout
);
472 rb_ssl_start_connected(rb_fde_t
* F
, CNCB
* callback
, void *data
, int timeout
)
474 struct ssl_connect
*sconn
;
479 sconn
= rb_malloc(sizeof(struct ssl_connect
));
481 sconn
->callback
= callback
;
482 sconn
->timeout
= timeout
;
483 F
->connect
= rb_malloc(sizeof(struct conndata
));
484 F
->connect
->callback
= callback
;
485 F
->connect
->data
= data
;
486 F
->type
|= RB_FD_SSL
;
487 F
->ssl
= SSL_new(ssl_client_ctx
);
489 SSL_set_fd((SSL
*) F
->ssl
, F
->fd
);
490 rb_settimeout(F
, sconn
->timeout
, rb_ssl_tryconn_timeout_cb
, sconn
);
491 if((ssl_err
= SSL_connect((SSL
*) F
->ssl
)) <= 0)
493 switch (ssl_err
= SSL_get_error((SSL
*) F
->ssl
, ssl_err
))
495 case SSL_ERROR_SYSCALL
:
496 if(rb_ignore_errno(errno
))
497 case SSL_ERROR_WANT_READ
:
498 case SSL_ERROR_WANT_WRITE
:
500 F
->ssl_errno
= get_last_err();
501 rb_setselect(F
, RB_SELECT_READ
| RB_SELECT_WRITE
,
502 rb_ssl_tryconn_cb
, sconn
);
506 F
->ssl_errno
= get_last_err();
507 rb_ssl_connect_realcb(F
, RB_ERROR_SSL
, sconn
);
513 rb_ssl_connect_realcb(F
, RB_OK
, sconn
);
518 rb_init_prng(const char *path
, prng_seed_t seed_type
)
520 if(seed_type
== RB_PRNG_DEFAULT
)
525 return RAND_status();
528 return RAND_status();
533 if(RAND_egd(path
) == -1)
537 if(RAND_load_file(path
, -1) == -1)
549 return RAND_status();
553 rb_get_random(void *buf
, size_t length
)
557 if(RAND_bytes(buf
, length
) > 0)
562 if(RAND_pseudo_bytes(buf
, length
) >= 0)
570 rb_get_ssl_strerror(rb_fde_t
* F
)
572 return ERR_error_string(F
->ssl_errno
, NULL
);
576 rb_supports_ssl(void)
581 #endif /* HAVE_OPESSL */