1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright (C) 2004-2006 Rémi Denis-Courmont
7 * Authors: Rémi Denis-Courmont <rem # videolan.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
30 /*****************************************************************************
32 *****************************************************************************/
37 #include <sys/types.h>
42 #ifdef HAVE_SYS_STAT_H
43 # include <sys/stat.h>
54 #include <gnutls/gnutls.h>
55 #include <gnutls/x509.h>
58 #define CACHE_EXPIRATION 3600
61 /*****************************************************************************
63 *****************************************************************************/
64 static int Open ( vlc_object_t * );
65 static void Close( vlc_object_t * );
67 #define DH_BITS_TEXT N_("Diffie-Hellman prime bits")
68 #define DH_BITS_LONGTEXT N_( \
69 "Allows you to modify the Diffie-Hellman prime's number of bits " \
70 "(used for TLS or SSL-based server-side encryption)." )
72 #define CACHE_EXPIRATION_TEXT N_("Expiration time for resumed TLS sessions")
73 #define CACHE_EXPIRATION_LONGTEXT N_( \
74 "Defines the delay before resumed TLS sessions will be expired " \
77 #define CACHE_SIZE_TEXT N_("Number of resumed TLS sessions")
78 #define CACHE_SIZE_LONGTEXT N_( \
79 "Allows you to modify the maximum number of resumed TLS sessions that " \
80 "the cache will hold." )
82 #define CHECK_CERT_TEXT N_("Check TLS/SSL server certificate validity")
83 #define CHECK_CERT_LONGTEXT N_( \
84 "Ensures that server certificate is valid " \
85 "(i.e. signed by an approved Certificate Authority)." )
87 #define CHECK_HOSTNAME_TEXT N_("Check TLS/SSL server hostname in certificate")
88 #define CHECK_HOSTNAME_LONGTEXT N_( \
89 "Ensures that server hostname in certificate match requested host name." )
91 #if defined (WIN32) || defined (UNDER_CE)
94 # define HOST_CA_PATH "/etc/ssl/certs"
98 set_shortname( "GnuTLS" );
99 set_description( _("GnuTLS TLS encryption layer") );
100 set_capability( "tls", 1 );
101 set_callbacks( Open, Close );
102 set_category( CAT_ADVANCED );
103 set_subcategory( SUBCAT_ADVANCED_MISC );
105 add_bool( "tls-check-cert", VLC_TRUE, NULL, CHECK_CERT_TEXT,
106 CHECK_CERT_LONGTEXT, VLC_FALSE );
107 add_bool( "tls-check-hostname", VLC_TRUE, NULL, CHECK_HOSTNAME_TEXT,
108 CHECK_HOSTNAME_LONGTEXT, VLC_FALSE );
110 add_integer( "gnutls-dh-bits", DH_BITS, NULL, DH_BITS_TEXT,
111 DH_BITS_LONGTEXT, VLC_TRUE );
112 add_integer( "gnutls-cache-expiration", CACHE_EXPIRATION, NULL,
113 CACHE_EXPIRATION_TEXT, CACHE_EXPIRATION_LONGTEXT, VLC_TRUE );
114 add_integer( "gnutls-cache-size", CACHE_SIZE, NULL, CACHE_SIZE_TEXT,
115 CACHE_SIZE_LONGTEXT, VLC_TRUE );
119 #define MAX_SESSION_ID 32
120 #define MAX_SESSION_DATA 1024
122 typedef struct saved_session_t
124 char id[MAX_SESSION_ID];
125 char data[MAX_SESSION_DATA];
132 typedef struct tls_server_sys_t
134 gnutls_certificate_credentials x509_cred;
135 gnutls_dh_params dh_params;
137 struct saved_session_t *p_cache;
138 struct saved_session_t *p_store;
140 vlc_mutex_t cache_lock;
142 int (*pf_handshake2)( tls_session_t * );
146 typedef struct tls_session_sys_t
148 gnutls_session session;
150 vlc_bool_t b_handshaked;
154 typedef struct tls_client_sys_t
156 struct tls_session_sys_t session;
157 gnutls_certificate_credentials x509_cred;
162 _get_Int( vlc_object_t *p_this, const char *var )
166 if( var_Get( p_this, var, &value ) != VLC_SUCCESS )
168 var_Create( p_this, var, VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
169 var_Get( p_this, var, &value );
176 _get_Bool( vlc_object_t *p_this, const char *var )
180 if( var_Get( p_this, var, &value ) != VLC_SUCCESS )
182 var_Create( p_this, var, VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
183 var_Get( p_this, var, &value );
189 #define get_Int( a, b ) _get_Int( (vlc_object_t *)(a), (b) )
190 #define get_Bool( a, b ) _get_Bool( (vlc_object_t *)(a), (b) )
193 /*****************************************************************************
195 *****************************************************************************
196 * Sends data through a TLS session.
197 *****************************************************************************/
199 gnutls_Send( void *p_session, const void *buf, int i_length )
202 tls_session_sys_t *p_sys;
204 p_sys = (tls_session_sys_t *)(((tls_session_t *)p_session)->p_sys);
206 val = gnutls_record_send( p_sys->session, buf, i_length );
207 /* TODO: handle fatal error */
208 return val < 0 ? -1 : val;
212 /*****************************************************************************
214 *****************************************************************************
215 * Receives data through a TLS session.
216 *****************************************************************************/
218 gnutls_Recv( void *p_session, void *buf, int i_length )
221 tls_session_sys_t *p_sys;
223 p_sys = (tls_session_sys_t *)(((tls_session_t *)p_session)->p_sys);
225 val = gnutls_record_recv( p_sys->session, buf, i_length );
226 /* TODO: handle fatal error */
227 return val < 0 ? -1 : val;
231 /*****************************************************************************
232 * tls_Session(Continue)?Handshake:
233 *****************************************************************************
234 * Establishes TLS session with a peer through socket <fd>.
235 * Returns -1 on error (you need not and must not call tls_SessionClose)
236 * 0 on succesful handshake completion, 1 if more would-be blocking recv is
237 * needed, 2 if more would-be blocking send is required.
238 *****************************************************************************/
240 gnutls_ContinueHandshake( tls_session_t *p_session)
242 tls_session_sys_t *p_sys;
245 p_sys = (tls_session_sys_t *)(p_session->p_sys);
247 /* TODO: handle fatal error */
248 val = gnutls_handshake( p_sys->session );
249 if( ( val == GNUTLS_E_AGAIN ) || ( val == GNUTLS_E_INTERRUPTED ) )
250 return 1 + gnutls_record_get_direction( p_sys->session );
254 msg_Err( p_session, "TLS handshake failed: %s",
255 gnutls_strerror( val ) );
256 p_session->pf_close( p_session );
260 p_sys->b_handshaked = VLC_TRUE;
265 gnutls_HandshakeAndValidate( tls_session_t *p_session )
269 val = gnutls_ContinueHandshake( p_session );
273 gnutls_x509_crt cert;
274 const gnutls_datum *p_data;
275 tls_session_sys_t *p_sys;
277 p_sys = (tls_session_sys_t *)(p_session->p_sys);
278 /* certificates chain verification */
279 val = gnutls_certificate_verify_peers2( p_sys->session, &status );
283 msg_Err( p_session, "TLS certificate verification failed: %s",
284 gnutls_strerror( val ) );
285 p_session->pf_close( p_session );
291 msg_Warn( p_session, "TLS session: access denied" );
292 if( status & GNUTLS_CERT_INVALID )
293 msg_Dbg( p_session, "certificate could not be verified" );
294 if( status & GNUTLS_CERT_REVOKED )
295 msg_Dbg( p_session, "certificate was revoked" );
296 if( status & GNUTLS_CERT_SIGNER_NOT_FOUND )
297 msg_Dbg( p_session, "certificate's signer was not found" );
298 if( status & GNUTLS_CERT_SIGNER_NOT_CA )
299 msg_Dbg( p_session, "certificate's signer is not a CA" );
300 p_session->pf_close( p_session );
304 msg_Dbg( p_session, "TLS certificate verified" );
305 if( p_sys->psz_hostname == NULL )
308 /* certificate (host)name verification */
309 p_data = gnutls_certificate_get_peers( p_sys->session, &status );
312 msg_Err( p_session, "TLS peer certificate not available" );
313 p_session->pf_close( p_session );
317 val = gnutls_x509_crt_init( &cert );
320 msg_Err( p_session, "x509 fatal error: %s",
321 gnutls_strerror( val ) );
322 p_session->pf_close( p_session );
326 val = gnutls_x509_crt_import( cert, p_data, GNUTLS_X509_FMT_DER );
329 msg_Err( p_session, "x509 certificate import error: %s",
330 gnutls_strerror( val ) );
331 gnutls_x509_crt_deinit( cert );
332 p_session->pf_close( p_session );
336 if( gnutls_x509_crt_check_hostname( cert, p_sys->psz_hostname ) == 0 )
338 msg_Err( p_session, "x509 certificate does not match \"%s\"",
339 p_sys->psz_hostname );
340 gnutls_x509_crt_deinit( cert );
341 p_session->pf_close( p_session );
345 gnutls_x509_crt_deinit( cert );
347 msg_Dbg( p_session, "x509 hostname verified" );
355 gnutls_BeginHandshake( tls_session_t *p_session, int fd,
356 const char *psz_hostname )
358 tls_session_sys_t *p_sys;
360 p_sys = (tls_session_sys_t *)(p_session->p_sys);
362 gnutls_transport_set_ptr (p_sys->session, (gnutls_transport_ptr)(intptr_t)fd);
364 if( psz_hostname != NULL )
366 gnutls_server_name_set( p_sys->session, GNUTLS_NAME_DNS, psz_hostname,
367 strlen( psz_hostname ) );
368 if( get_Bool( p_session, "tls-check-hostname" ) )
370 p_sys->psz_hostname = strdup( psz_hostname );
371 if( p_sys->psz_hostname == NULL )
373 p_session->pf_close( p_session );
379 return p_session->pf_handshake2( p_session );
382 /*****************************************************************************
384 *****************************************************************************
385 * Terminates TLS session and releases session data.
386 *****************************************************************************/
388 gnutls_SessionClose( tls_session_t *p_session )
390 tls_session_sys_t *p_sys;
392 p_sys = (tls_session_sys_t *)(p_session->p_sys);
394 if( p_sys->b_handshaked == VLC_TRUE )
395 gnutls_bye( p_sys->session, GNUTLS_SHUT_WR );
396 gnutls_deinit( p_sys->session );
398 if( p_sys->psz_hostname != NULL )
399 free( p_sys->psz_hostname );
401 vlc_object_detach( p_session );
402 vlc_object_destroy( p_session );
408 gnutls_ClientDelete( tls_session_t *p_session )
410 /* On the client-side, credentials are re-allocated per session */
411 gnutls_certificate_credentials x509_cred =
412 ((tls_client_sys_t *)(p_session->p_sys))->x509_cred;
414 gnutls_SessionClose( p_session );
416 /* credentials must be free'd *after* gnutls_deinit() */
417 gnutls_certificate_free_credentials( x509_cred );
421 gnutls_Addx509Directory( vlc_object_t *p_this,
422 gnutls_certificate_credentials cred,
423 const char *psz_dirname,
427 const char *psz_dirent;
429 if( *psz_dirname == '\0' )
432 dir = utf8_opendir( psz_dirname );
435 msg_Warn( p_this, "Cannot open directory (%s): %s", psz_dirname,
442 struct stat st1, st2;
443 int fd = dirfd( dir );
446 * Gets stats for the directory path, checks that it is not a
447 * symbolic link (to avoid possibly infinite recursion), and verifies
448 * that the inode is still the same, to avoid TOCTOU race condition.
451 || fstat( fd, &st1 ) || utf8_lstat( psz_dirname, &st2 )
452 || S_ISLNK( st2.st_mode ) || ( st1.st_ino != st2.st_ino ) )
460 while( ( psz_dirent = utf8_readdir( dir ) ) != NULL )
466 if( ( strcmp( ".", psz_dirent ) == 0 )
467 || ( strcmp( "..", psz_dirent ) == 0 ) )
470 check = asprintf( &psz_filename, "%s/%s", psz_dirname,
472 LocaleFree( psz_dirent );
476 if( utf8_stat( psz_filename, &st ) == 0 )
478 if( S_ISREG( st.st_mode ) )
480 char *psz_localname = ToLocale( psz_filename );
482 ? gnutls_certificate_set_x509_key_file( cred,
483 psz_localname, psz_localname, GNUTLS_X509_FMT_PEM )
484 : gnutls_certificate_set_x509_trust_file( cred,
485 psz_localname, GNUTLS_X509_FMT_PEM );
486 LocaleFree( psz_localname );
489 msg_Warn( p_this, "Cannot add x509 certificate (%s): %s",
490 psz_filename, gnutls_strerror( i ) );
492 msg_Dbg( p_this, "Added x509 credentials (%s)",
495 else if( S_ISDIR( st.st_mode ) )
498 "Looking recursively for x509 certificates in %s",
500 gnutls_Addx509Directory( p_this, cred, psz_filename, b_priv);
503 free( psz_filename );
510 /*****************************************************************************
512 *****************************************************************************
513 * Initializes client-side TLS session data.
514 *****************************************************************************/
515 static tls_session_t *
516 gnutls_ClientCreate( tls_t *p_tls )
518 tls_session_t *p_session = NULL;
519 tls_client_sys_t *p_sys = NULL;
521 const int cert_type_priority[3] =
527 p_sys = (tls_client_sys_t *)malloc( sizeof(struct tls_client_sys_t) );
531 p_session = (struct tls_session_t *)vlc_object_create ( p_tls, sizeof(struct tls_session_t) );
532 if( p_session == NULL )
538 p_session->p_sys = p_sys;
539 p_session->sock.p_sys = p_session;
540 p_session->sock.pf_send = gnutls_Send;
541 p_session->sock.pf_recv = gnutls_Recv;
542 p_session->pf_handshake = gnutls_BeginHandshake;
543 p_session->pf_close = gnutls_ClientDelete;
545 p_sys->session.b_handshaked = VLC_FALSE;
546 p_sys->session.psz_hostname = NULL;
548 vlc_object_attach( p_session, p_tls );
550 i_val = gnutls_certificate_allocate_credentials( &p_sys->x509_cred );
553 msg_Err( p_tls, "Cannot allocate X509 credentials: %s",
554 gnutls_strerror( i_val ) );
558 if( get_Bool( p_tls, "tls-check-cert" ) )
562 if( asprintf( &psz_path, "%s/"CONFIG_DIR"/ssl/certs",
563 p_tls->p_vlc->psz_homedir ) == -1 )
565 gnutls_certificate_free_credentials( p_sys->x509_cred );
569 gnutls_Addx509Directory( (vlc_object_t *)p_session, p_sys->x509_cred,
570 psz_path, VLC_FALSE );
572 gnutls_Addx509Directory( (vlc_object_t *)p_session, p_sys->x509_cred,
573 HOST_CA_PATH, VLC_FALSE );
577 p_session->pf_handshake2 = gnutls_HandshakeAndValidate;
580 p_session->pf_handshake2 = gnutls_ContinueHandshake;
585 if( asprintf( &psz_path, "%s/"CONFIG_DIR"/ssl/private",
586 p_tls->p_vlc->psz_homedir ) == -1 )
588 gnutls_certificate_free_credentials( p_sys->x509_cred );
592 gnutls_Addx509Directory( (vlc_object_t *)p_session, p_sys->x509_cred,
593 psz_path, VLC_TRUE );
598 i_val = gnutls_init( &p_sys->session.session, GNUTLS_CLIENT );
601 msg_Err( p_tls, "Cannot initialize TLS session: %s",
602 gnutls_strerror( i_val ) );
603 gnutls_certificate_free_credentials( p_sys->x509_cred );
607 i_val = gnutls_set_default_priority( p_sys->session.session );
610 msg_Err( p_tls, "Cannot set ciphers priorities: %s",
611 gnutls_strerror( i_val ) );
612 gnutls_deinit( p_sys->session.session );
613 gnutls_certificate_free_credentials( p_sys->x509_cred );
617 i_val = gnutls_certificate_type_set_priority( p_sys->session.session,
618 cert_type_priority );
621 msg_Err( p_tls, "Cannot set certificate type priorities: %s",
622 gnutls_strerror( i_val ) );
623 gnutls_deinit( p_sys->session.session );
624 gnutls_certificate_free_credentials( p_sys->x509_cred );
628 i_val = gnutls_credentials_set( p_sys->session.session,
629 GNUTLS_CRD_CERTIFICATE,
633 msg_Err( p_tls, "Cannot set TLS session credentials: %s",
634 gnutls_strerror( i_val ) );
635 gnutls_deinit( p_sys->session.session );
636 gnutls_certificate_free_credentials( p_sys->x509_cred );
643 vlc_object_detach( p_session );
644 vlc_object_destroy( p_session );
651 /*****************************************************************************
652 * TLS session resumption callbacks
653 *****************************************************************************/
654 static int cb_store( void *p_server, gnutls_datum key, gnutls_datum data )
656 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
658 if( ( p_sys->i_cache_size == 0 )
659 || ( key.size > MAX_SESSION_ID )
660 || ( data.size > MAX_SESSION_DATA ) )
663 vlc_mutex_lock( &p_sys->cache_lock );
665 memcpy( p_sys->p_store->id, key.data, key.size);
666 memcpy( p_sys->p_store->data, data.data, data.size );
667 p_sys->p_store->i_idlen = key.size;
668 p_sys->p_store->i_datalen = data.size;
671 if( ( p_sys->p_store - p_sys->p_cache ) == p_sys->i_cache_size )
672 p_sys->p_store = p_sys->p_cache;
674 vlc_mutex_unlock( &p_sys->cache_lock );
680 static const gnutls_datum err_datum = { NULL, 0 };
682 static gnutls_datum cb_fetch( void *p_server, gnutls_datum key )
684 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
685 saved_session_t *p_session, *p_end;
687 p_session = p_sys->p_cache;
688 p_end = p_session + p_sys->i_cache_size;
690 vlc_mutex_lock( &p_sys->cache_lock );
692 while( p_session < p_end )
694 if( ( p_session->i_idlen == key.size )
695 && !memcmp( p_session->id, key.data, key.size ) )
699 data.size = p_session->i_datalen;
701 data.data = gnutls_malloc( data.size );
702 if( data.data == NULL )
704 vlc_mutex_unlock( &p_sys->cache_lock );
708 memcpy( data.data, p_session->data, data.size );
709 vlc_mutex_unlock( &p_sys->cache_lock );
715 vlc_mutex_unlock( &p_sys->cache_lock );
721 static int cb_delete( void *p_server, gnutls_datum key )
723 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
724 saved_session_t *p_session, *p_end;
726 p_session = p_sys->p_cache;
727 p_end = p_session + p_sys->i_cache_size;
729 vlc_mutex_lock( &p_sys->cache_lock );
731 while( p_session < p_end )
733 if( ( p_session->i_idlen == key.size )
734 && !memcmp( p_session->id, key.data, key.size ) )
736 p_session->i_datalen = p_session->i_idlen = 0;
737 vlc_mutex_unlock( &p_sys->cache_lock );
743 vlc_mutex_unlock( &p_sys->cache_lock );
749 /*****************************************************************************
750 * tls_ServerSessionPrepare:
751 *****************************************************************************
752 * Initializes server-side TLS session data.
753 *****************************************************************************/
754 static tls_session_t *
755 gnutls_ServerSessionPrepare( tls_server_t *p_server )
757 tls_session_t *p_session;
758 tls_server_sys_t *p_server_sys;
759 gnutls_session session;
762 p_session = vlc_object_create( p_server, sizeof (struct tls_session_t) );
763 if( p_session == NULL )
766 p_session->p_sys = malloc( sizeof(struct tls_session_sys_t) );
767 if( p_session->p_sys == NULL )
769 vlc_object_destroy( p_session );
773 vlc_object_attach( p_session, p_server );
775 p_server_sys = (tls_server_sys_t *)p_server->p_sys;
776 p_session->sock.p_sys = p_session;
777 p_session->sock.pf_send = gnutls_Send;
778 p_session->sock.pf_recv = gnutls_Recv;
779 p_session->pf_handshake = gnutls_BeginHandshake;
780 p_session->pf_handshake2 = p_server_sys->pf_handshake2;
781 p_session->pf_close = gnutls_SessionClose;
783 ((tls_session_sys_t *)p_session->p_sys)->b_handshaked = VLC_FALSE;
784 ((tls_session_sys_t *)p_session->p_sys)->psz_hostname = NULL;
786 i_val = gnutls_init( &session, GNUTLS_SERVER );
789 msg_Err( p_server, "Cannot initialize TLS session: %s",
790 gnutls_strerror( i_val ) );
794 ((tls_session_sys_t *)p_session->p_sys)->session = session;
796 i_val = gnutls_set_default_priority( session );
799 msg_Err( p_server, "Cannot set ciphers priorities: %s",
800 gnutls_strerror( i_val ) );
801 gnutls_deinit( session );
805 i_val = gnutls_credentials_set( session, GNUTLS_CRD_CERTIFICATE,
806 p_server_sys->x509_cred );
809 msg_Err( p_server, "Cannot set TLS session credentials: %s",
810 gnutls_strerror( i_val ) );
811 gnutls_deinit( session );
815 if( p_session->pf_handshake2 == gnutls_HandshakeAndValidate )
816 gnutls_certificate_server_set_request( session, GNUTLS_CERT_REQUIRE );
818 gnutls_dh_set_prime_bits( session, get_Int( p_server, "gnutls-dh-bits" ) );
820 /* Session resumption support */
821 gnutls_db_set_cache_expiration( session, get_Int( p_server,
822 "gnutls-cache-expiration" ) );
823 gnutls_db_set_retrieve_function( session, cb_fetch );
824 gnutls_db_set_remove_function( session, cb_delete );
825 gnutls_db_set_store_function( session, cb_store );
826 gnutls_db_set_ptr( session, p_server );
831 free( p_session->p_sys );
832 vlc_object_detach( p_session );
833 vlc_object_destroy( p_session );
838 /*****************************************************************************
840 *****************************************************************************
841 * Releases data allocated with tls_ServerCreate.
842 *****************************************************************************/
844 gnutls_ServerDelete( tls_server_t *p_server )
846 tls_server_sys_t *p_sys;
847 p_sys = (tls_server_sys_t *)p_server->p_sys;
849 vlc_mutex_destroy( &p_sys->cache_lock );
850 free( p_sys->p_cache );
852 vlc_object_detach( p_server );
853 vlc_object_destroy( p_server );
855 /* all sessions depending on the server are now deinitialized */
856 gnutls_certificate_free_credentials( p_sys->x509_cred );
857 gnutls_dh_params_deinit( p_sys->dh_params );
862 /*****************************************************************************
864 *****************************************************************************
865 * Adds one or more certificate authorities.
866 * Returns -1 on error, 0 on success.
867 *****************************************************************************/
869 gnutls_ServerAddCA( tls_server_t *p_server, const char *psz_ca_path )
871 tls_server_sys_t *p_sys;
872 char *psz_local_path;
875 p_sys = (tls_server_sys_t *)(p_server->p_sys);
877 psz_local_path = ToLocale( psz_ca_path );
878 val = gnutls_certificate_set_x509_trust_file( p_sys->x509_cred,
880 GNUTLS_X509_FMT_PEM );
881 LocaleFree( psz_local_path );
884 msg_Err( p_server, "Cannot add trusted CA (%s): %s", psz_ca_path,
885 gnutls_strerror( val ) );
888 msg_Dbg( p_server, " %d trusted CA added (%s)", val, psz_ca_path );
890 /* enables peer's certificate verification */
891 p_sys->pf_handshake2 = gnutls_HandshakeAndValidate;
897 /*****************************************************************************
899 *****************************************************************************
900 * Adds a certificates revocation list to be sent to TLS clients.
901 * Returns -1 on error, 0 on success.
902 *****************************************************************************/
904 gnutls_ServerAddCRL( tls_server_t *p_server, const char *psz_crl_path )
907 char *psz_local_path = ToLocale( psz_crl_path );
909 val = gnutls_certificate_set_x509_crl_file( ((tls_server_sys_t *)
910 (p_server->p_sys))->x509_cred,
912 GNUTLS_X509_FMT_PEM );
913 LocaleFree( psz_crl_path );
916 msg_Err( p_server, "Cannot add CRL (%s): %s", psz_crl_path,
917 gnutls_strerror( val ) );
920 msg_Dbg( p_server, "%d CRL added (%s)", val, psz_crl_path );
925 /*****************************************************************************
927 *****************************************************************************
928 * Allocates a whole server's TLS credentials.
929 * Returns NULL on error.
930 *****************************************************************************/
931 static tls_server_t *
932 gnutls_ServerCreate( tls_t *p_tls, const char *psz_cert_path,
933 const char *psz_key_path )
935 tls_server_t *p_server;
936 tls_server_sys_t *p_sys;
937 char *psz_local_key, *psz_local_cert;
940 msg_Dbg( p_tls, "Creating TLS server" );
942 p_sys = (tls_server_sys_t *)malloc( sizeof(struct tls_server_sys_t) );
946 p_sys->i_cache_size = get_Int( p_tls, "gnutls-cache-size" );
947 p_sys->p_cache = (struct saved_session_t *)calloc( p_sys->i_cache_size,
948 sizeof( struct saved_session_t ) );
949 if( p_sys->p_cache == NULL )
954 p_sys->p_store = p_sys->p_cache;
956 p_server = vlc_object_create( p_tls, sizeof(struct tls_server_t) );
957 if( p_server == NULL )
959 free( p_sys->p_cache );
964 vlc_object_attach( p_server, p_tls );
966 p_server->p_sys = p_sys;
967 p_server->pf_delete = gnutls_ServerDelete;
968 p_server->pf_add_CA = gnutls_ServerAddCA;
969 p_server->pf_add_CRL = gnutls_ServerAddCRL;
970 p_server->pf_session_prepare = gnutls_ServerSessionPrepare;
972 /* No certificate validation by default */
973 p_sys->pf_handshake2 = gnutls_ContinueHandshake;
975 /* FIXME: check for errors */
976 vlc_mutex_init( p_server, &p_sys->cache_lock );
978 /* Sets server's credentials */
979 val = gnutls_certificate_allocate_credentials( &p_sys->x509_cred );
982 msg_Err( p_server, "Cannot allocate X509 credentials: %s",
983 gnutls_strerror( val ) );
987 psz_local_cert = ToLocale( psz_cert_path );
988 psz_local_key = ToLocale( psz_key_path );
989 val = gnutls_certificate_set_x509_key_file( p_sys->x509_cred,
990 psz_local_cert, psz_local_key,
991 GNUTLS_X509_FMT_PEM );
992 LocaleFree( psz_cert_path );
993 LocaleFree( psz_key_path );
996 msg_Err( p_server, "Cannot set certificate chain or private key: %s",
997 gnutls_strerror( val ) );
998 gnutls_certificate_free_credentials( p_sys->x509_cred );
1003 * - regenerate these regularly
1004 * - support other ciper suites
1006 val = gnutls_dh_params_init( &p_sys->dh_params );
1009 msg_Dbg( p_server, "Computing Diffie Hellman ciphers parameters" );
1010 val = gnutls_dh_params_generate2( p_sys->dh_params,
1011 get_Int( p_tls, "gnutls-dh-bits" ) );
1015 msg_Err( p_server, "Cannot initialize DH cipher suites: %s",
1016 gnutls_strerror( val ) );
1017 gnutls_certificate_free_credentials( p_sys->x509_cred );
1020 msg_Dbg( p_server, "Ciphers parameters computed" );
1022 gnutls_certificate_set_dh_params( p_sys->x509_cred, p_sys->dh_params);
1027 vlc_mutex_destroy( &p_sys->cache_lock );
1028 vlc_object_detach( p_server );
1029 vlc_object_destroy( p_server );
1035 /*****************************************************************************
1036 * gcrypt thread option VLC implementation:
1037 *****************************************************************************/
1038 vlc_object_t *__p_gcry_data;
1040 static int gcry_vlc_mutex_init( void **p_sys )
1043 vlc_mutex_t *p_lock = (vlc_mutex_t *)malloc( sizeof( vlc_mutex_t ) );
1048 i_val = vlc_mutex_init( __p_gcry_data, p_lock );
1056 static int gcry_vlc_mutex_destroy( void **p_sys )
1059 vlc_mutex_t *p_lock = (vlc_mutex_t *)*p_sys;
1061 i_val = vlc_mutex_destroy( p_lock );
1066 static int gcry_vlc_mutex_lock( void **p_sys )
1068 return vlc_mutex_lock( (vlc_mutex_t *)*p_sys );
1071 static int gcry_vlc_mutex_unlock( void **lock )
1073 return vlc_mutex_unlock( (vlc_mutex_t *)*lock );
1076 static struct gcry_thread_cbs gcry_threads_vlc =
1078 GCRY_THREAD_OPTION_USER,
1080 gcry_vlc_mutex_init,
1081 gcry_vlc_mutex_destroy,
1082 gcry_vlc_mutex_lock,
1083 gcry_vlc_mutex_unlock
1087 /*****************************************************************************
1088 * Module initialization
1089 *****************************************************************************/
1091 Open( vlc_object_t *p_this )
1093 tls_t *p_tls = (tls_t *)p_this;
1095 vlc_value_t lock, count;
1097 var_Create( p_this->p_libvlc, "gnutls_mutex", VLC_VAR_MUTEX );
1098 var_Get( p_this->p_libvlc, "gnutls_mutex", &lock );
1099 vlc_mutex_lock( lock.p_address );
1101 /* Initialize GnuTLS only once */
1102 var_Create( p_this->p_libvlc, "gnutls_count", VLC_VAR_INTEGER );
1103 var_Get( p_this->p_libvlc, "gnutls_count", &count);
1105 if( count.i_int == 0)
1107 const char *psz_version;
1109 __p_gcry_data = VLC_OBJECT( p_this->p_vlc );
1111 gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_vlc);
1112 if( gnutls_global_init( ) )
1114 msg_Warn( p_this, "cannot initialize GnuTLS" );
1115 vlc_mutex_unlock( lock.p_address );
1116 return VLC_EGENERIC;
1119 * FIXME: in fact, we currently depends on 1.0.17, but it breaks on
1120 * Debian which as a patched 1.0.16 (which we can use).
1122 psz_version = gnutls_check_version( "1.0.16" );
1123 if( psz_version == NULL )
1125 gnutls_global_deinit( );
1126 vlc_mutex_unlock( lock.p_address );
1127 msg_Err( p_this, "unsupported GnuTLS version" );
1128 return VLC_EGENERIC;
1130 msg_Dbg( p_this, "GnuTLS v%s initialized", psz_version );
1134 var_Set( p_this->p_libvlc, "gnutls_count", count);
1135 vlc_mutex_unlock( lock.p_address );
1137 p_tls->pf_server_create = gnutls_ServerCreate;
1138 p_tls->pf_client_create = gnutls_ClientCreate;
1143 /*****************************************************************************
1144 * Module deinitialization
1145 *****************************************************************************/
1147 Close( vlc_object_t *p_this )
1149 /*tls_t *p_tls = (tls_t *)p_this;
1150 tls_sys_t *p_sys = (tls_sys_t *)(p_this->p_sys);*/
1152 vlc_value_t lock, count;
1154 var_Create( p_this->p_libvlc, "gnutls_mutex", VLC_VAR_MUTEX );
1155 var_Get( p_this->p_libvlc, "gnutls_mutex", &lock );
1156 vlc_mutex_lock( lock.p_address );
1158 var_Create( p_this->p_libvlc, "gnutls_count", VLC_VAR_INTEGER );
1159 var_Get( p_this->p_libvlc, "gnutls_count", &count);
1161 var_Set( p_this->p_libvlc, "gnutls_count", count);
1163 if( count.i_int == 0 )
1165 gnutls_global_deinit( );
1166 msg_Dbg( p_this, "GnuTLS deinitialized" );
1169 vlc_mutex_unlock( lock.p_address );