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." )
92 set_shortname( "GnuTLS" );
93 set_description( _("GnuTLS TLS encryption layer") );
94 set_capability( "tls", 1 );
95 set_callbacks( Open, Close );
96 set_category( CAT_ADVANCED );
97 set_subcategory( SUBCAT_ADVANCED_MISC );
99 add_bool( "tls-check-cert", VLC_TRUE, NULL, CHECK_CERT_TEXT,
100 CHECK_CERT_LONGTEXT, VLC_FALSE );
101 add_bool( "tls-check-hostname", VLC_TRUE, NULL, CHECK_HOSTNAME_TEXT,
102 CHECK_HOSTNAME_LONGTEXT, VLC_FALSE );
104 add_integer( "gnutls-dh-bits", DH_BITS, NULL, DH_BITS_TEXT,
105 DH_BITS_LONGTEXT, VLC_TRUE );
106 add_integer( "gnutls-cache-expiration", CACHE_EXPIRATION, NULL,
107 CACHE_EXPIRATION_TEXT, CACHE_EXPIRATION_LONGTEXT, VLC_TRUE );
108 add_integer( "gnutls-cache-size", CACHE_SIZE, NULL, CACHE_SIZE_TEXT,
109 CACHE_SIZE_LONGTEXT, VLC_TRUE );
113 #define MAX_SESSION_ID 32
114 #define MAX_SESSION_DATA 1024
116 typedef struct saved_session_t
118 char id[MAX_SESSION_ID];
119 char data[MAX_SESSION_DATA];
126 typedef struct tls_server_sys_t
128 gnutls_certificate_credentials x509_cred;
129 gnutls_dh_params dh_params;
131 struct saved_session_t *p_cache;
132 struct saved_session_t *p_store;
134 vlc_mutex_t cache_lock;
136 int (*pf_handshake2)( tls_session_t * );
140 typedef struct tls_session_sys_t
142 gnutls_session session;
144 vlc_bool_t b_handshaked;
148 typedef struct tls_client_sys_t
150 struct tls_session_sys_t session;
151 gnutls_certificate_credentials x509_cred;
156 _get_Int( vlc_object_t *p_this, const char *var )
160 if( var_Get( p_this, var, &value ) != VLC_SUCCESS )
162 var_Create( p_this, var, VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
163 var_Get( p_this, var, &value );
170 _get_Bool( vlc_object_t *p_this, const char *var )
174 if( var_Get( p_this, var, &value ) != VLC_SUCCESS )
176 var_Create( p_this, var, VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
177 var_Get( p_this, var, &value );
183 #define get_Int( a, b ) _get_Int( (vlc_object_t *)(a), (b) )
184 #define get_Bool( a, b ) _get_Bool( (vlc_object_t *)(a), (b) )
187 /*****************************************************************************
189 *****************************************************************************
190 * Sends data through a TLS session.
191 *****************************************************************************/
193 gnutls_Send( void *p_session, const void *buf, int i_length )
196 tls_session_sys_t *p_sys;
198 p_sys = (tls_session_sys_t *)(((tls_session_t *)p_session)->p_sys);
200 val = gnutls_record_send( p_sys->session, buf, i_length );
201 /* TODO: handle fatal error */
202 return val < 0 ? -1 : val;
206 /*****************************************************************************
208 *****************************************************************************
209 * Receives data through a TLS session.
210 *****************************************************************************/
212 gnutls_Recv( void *p_session, void *buf, int i_length )
215 tls_session_sys_t *p_sys;
217 p_sys = (tls_session_sys_t *)(((tls_session_t *)p_session)->p_sys);
219 val = gnutls_record_recv( p_sys->session, buf, i_length );
220 /* TODO: handle fatal error */
221 return val < 0 ? -1 : val;
225 /*****************************************************************************
226 * tls_Session(Continue)?Handshake:
227 *****************************************************************************
228 * Establishes TLS session with a peer through socket <fd>.
229 * Returns -1 on error (you need not and must not call tls_SessionClose)
230 * 0 on succesful handshake completion, 1 if more would-be blocking recv is
231 * needed, 2 if more would-be blocking send is required.
232 *****************************************************************************/
234 gnutls_ContinueHandshake( tls_session_t *p_session)
236 tls_session_sys_t *p_sys;
239 p_sys = (tls_session_sys_t *)(p_session->p_sys);
241 /* TODO: handle fatal error */
242 val = gnutls_handshake( p_sys->session );
243 if( ( val == GNUTLS_E_AGAIN ) || ( val == GNUTLS_E_INTERRUPTED ) )
244 return 1 + gnutls_record_get_direction( p_sys->session );
248 msg_Err( p_session, "TLS handshake failed: %s",
249 gnutls_strerror( val ) );
250 p_session->pf_close( p_session );
254 p_sys->b_handshaked = VLC_TRUE;
259 gnutls_VerifyHostname( vlc_object_t *p_this, gnutls_session session,
260 const char *psz_hostname )
262 const gnutls_datum *p_data;
263 gnutls_x509_crt cert;
267 /* certificate (host)name verification */
268 p_data = gnutls_certificate_get_peers( session, &status );
271 msg_Err( p_this, "TLS peer certificate not available" );
275 val = gnutls_x509_crt_init( &cert );
278 msg_Err( p_this, "x509 fatal error: %s", gnutls_strerror( val ) );
282 val = gnutls_x509_crt_import( cert, p_data, GNUTLS_X509_FMT_DER );
285 msg_Err( p_this, "x509 certificate import error: %s",
286 gnutls_strerror( val ) );
287 gnutls_x509_crt_deinit( cert );
291 if( gnutls_x509_crt_check_hostname( cert, psz_hostname ) == 0 )
293 msg_Err( p_this, "x509 certificate does not match \"%s\"",
295 gnutls_x509_crt_deinit( cert );
299 gnutls_x509_crt_deinit( cert );
300 msg_Dbg( p_this, "x509 hostname matches %s", psz_hostname );
305 gnutls_HandshakeAndValidate( tls_session_t *p_session )
309 val = gnutls_ContinueHandshake( p_session );
313 tls_session_sys_t *p_sys;
315 p_sys = (tls_session_sys_t *)(p_session->p_sys);
316 /* certificates chain verification */
317 val = gnutls_certificate_verify_peers2( p_sys->session, &status );
321 msg_Err( p_session, "TLS certificate verification failed: %s",
322 gnutls_strerror( val ) );
323 p_session->pf_close( p_session );
329 msg_Warn( p_session, "TLS session: access denied" );
330 if( status & GNUTLS_CERT_INVALID )
331 msg_Dbg( p_session, "certificate could not be verified" );
332 if( status & GNUTLS_CERT_REVOKED )
333 msg_Dbg( p_session, "certificate was revoked" );
334 if( status & GNUTLS_CERT_SIGNER_NOT_FOUND )
335 msg_Dbg( p_session, "certificate's signer was not found" );
336 if( status & GNUTLS_CERT_SIGNER_NOT_CA )
337 msg_Dbg( p_session, "certificate's signer is not a CA" );
338 p_session->pf_close( p_session );
342 msg_Dbg( p_session, "TLS certificate verified" );
343 if( ( p_sys->psz_hostname != NULL )
344 && gnutls_VerifyHostname( (vlc_object_t *)p_session, p_sys->session,
345 p_sys->psz_hostname ) )
347 p_session->pf_close( p_session );
357 gnutls_BeginHandshake( tls_session_t *p_session, int fd,
358 const char *psz_hostname )
360 tls_session_sys_t *p_sys;
362 p_sys = (tls_session_sys_t *)(p_session->p_sys);
364 gnutls_transport_set_ptr (p_sys->session, (gnutls_transport_ptr)(intptr_t)fd);
366 if( psz_hostname != NULL )
368 gnutls_server_name_set( p_sys->session, GNUTLS_NAME_DNS, psz_hostname,
369 strlen( psz_hostname ) );
370 if( get_Bool( p_session, "tls-check-hostname" ) )
372 p_sys->psz_hostname = strdup( psz_hostname );
373 if( p_sys->psz_hostname == NULL )
375 p_session->pf_close( p_session );
381 return p_session->pf_handshake2( p_session );
384 /*****************************************************************************
386 *****************************************************************************
387 * Terminates TLS session and releases session data.
388 *****************************************************************************/
390 gnutls_SessionClose( tls_session_t *p_session )
392 tls_session_sys_t *p_sys;
394 p_sys = (tls_session_sys_t *)(p_session->p_sys);
396 if( p_sys->b_handshaked == VLC_TRUE )
397 gnutls_bye( p_sys->session, GNUTLS_SHUT_WR );
398 gnutls_deinit( p_sys->session );
400 if( p_sys->psz_hostname != NULL )
401 free( p_sys->psz_hostname );
403 vlc_object_detach( p_session );
404 vlc_object_destroy( p_session );
410 gnutls_ClientDelete( tls_session_t *p_session )
412 /* On the client-side, credentials are re-allocated per session */
413 gnutls_certificate_credentials x509_cred =
414 ((tls_client_sys_t *)(p_session->p_sys))->x509_cred;
416 gnutls_SessionClose( p_session );
418 /* credentials must be free'd *after* gnutls_deinit() */
419 gnutls_certificate_free_credentials( x509_cred );
424 gnutls_Addx509File( vlc_object_t *p_this,
425 gnutls_certificate_credentials cred,
426 const char *psz_path, vlc_bool_t b_priv );
429 gnutls_Addx509Directory( vlc_object_t *p_this,
430 gnutls_certificate_credentials cred,
431 const char *psz_dirname,
435 const char *psz_dirent;
437 if( *psz_dirname == '\0' )
440 dir = utf8_opendir( psz_dirname );
443 msg_Warn( p_this, "Cannot open directory (%s): %s", psz_dirname,
450 struct stat st1, st2;
451 int fd = dirfd( dir );
454 * Gets stats for the directory path, checks that it is not a
455 * symbolic link (to avoid possibly infinite recursion), and verifies
456 * that the inode is still the same, to avoid TOCTOU race condition.
459 || fstat( fd, &st1 ) || utf8_lstat( psz_dirname, &st2 )
460 || S_ISLNK( st2.st_mode ) || ( st1.st_ino != st2.st_ino ) )
468 while( ( psz_dirent = utf8_readdir( dir ) ) != NULL )
473 if( ( strcmp( ".", psz_dirent ) == 0 )
474 || ( strcmp( "..", psz_dirent ) == 0 ) )
477 check = asprintf( &psz_filename, "%s/%s", psz_dirname,
479 LocaleFree( psz_dirent );
483 gnutls_Addx509File( p_this, cred, psz_filename, b_priv );
484 free( psz_filename );
493 gnutls_Addx509File( vlc_object_t *p_this,
494 gnutls_certificate_credentials cred,
495 const char *psz_path, vlc_bool_t b_priv )
499 if( utf8_stat( psz_path, &st ) == 0 )
501 if( S_ISREG( st.st_mode ) )
503 char *psz_localname = ToLocale( psz_path );
505 ? gnutls_certificate_set_x509_key_file( cred,
506 psz_localname, psz_localname, GNUTLS_X509_FMT_PEM )
507 : gnutls_certificate_set_x509_trust_file( cred,
508 psz_localname, GNUTLS_X509_FMT_PEM );
509 LocaleFree( psz_localname );
513 msg_Warn( p_this, "Cannot add x509 credentials (%s): %s",
514 psz_path, gnutls_strerror( i ) );
519 msg_Dbg( p_this, "Added x509 credentials (%s)",
524 else if( S_ISDIR( st.st_mode ) )
527 "Looking recursively for x509 credentials in %s",
529 return gnutls_Addx509Directory( p_this, cred, psz_path, b_priv);
536 /*****************************************************************************
538 *****************************************************************************
539 * Initializes client-side TLS session data.
540 *****************************************************************************/
541 static tls_session_t *
542 gnutls_ClientCreate( tls_t *p_tls )
544 tls_session_t *p_session = NULL;
545 tls_client_sys_t *p_sys = NULL;
547 const int cert_type_priority[3] =
553 p_sys = (tls_client_sys_t *)malloc( sizeof(struct tls_client_sys_t) );
557 p_session = (struct tls_session_t *)vlc_object_create ( p_tls, sizeof(struct tls_session_t) );
558 if( p_session == NULL )
564 p_session->p_sys = p_sys;
565 p_session->sock.p_sys = p_session;
566 p_session->sock.pf_send = gnutls_Send;
567 p_session->sock.pf_recv = gnutls_Recv;
568 p_session->pf_handshake = gnutls_BeginHandshake;
569 p_session->pf_close = gnutls_ClientDelete;
571 p_sys->session.b_handshaked = VLC_FALSE;
572 p_sys->session.psz_hostname = NULL;
574 vlc_object_attach( p_session, p_tls );
576 i_val = gnutls_certificate_allocate_credentials( &p_sys->x509_cred );
579 msg_Err( p_tls, "Cannot allocate X509 credentials: %s",
580 gnutls_strerror( i_val ) );
584 if( get_Bool( p_tls, "tls-check-cert" ) )
588 if( asprintf( &psz_path, "%s/"CONFIG_DIR"/ssl/certs",
589 p_tls->p_vlc->psz_homedir ) == -1 )
591 gnutls_certificate_free_credentials( p_sys->x509_cred );
595 gnutls_Addx509Directory( (vlc_object_t *)p_session, p_sys->x509_cred,
596 psz_path, VLC_FALSE );
597 #ifdef X509_CA_BUNDLE
598 gnutls_Addx509File( (vlc_object_t *)p_session, p_sys->x509_cred,
599 X509_CA_BUNDLE, VLC_FALSE );
603 p_session->pf_handshake2 = gnutls_HandshakeAndValidate;
606 p_session->pf_handshake2 = gnutls_ContinueHandshake;
611 if( asprintf( &psz_path, "%s/"CONFIG_DIR"/ssl/private",
612 p_tls->p_vlc->psz_homedir ) == -1 )
614 gnutls_certificate_free_credentials( p_sys->x509_cred );
618 gnutls_Addx509Directory( (vlc_object_t *)p_session, p_sys->x509_cred,
619 psz_path, VLC_TRUE );
624 i_val = gnutls_init( &p_sys->session.session, GNUTLS_CLIENT );
627 msg_Err( p_tls, "Cannot initialize TLS session: %s",
628 gnutls_strerror( i_val ) );
629 gnutls_certificate_free_credentials( p_sys->x509_cred );
633 i_val = gnutls_set_default_priority( p_sys->session.session );
636 msg_Err( p_tls, "Cannot set ciphers priorities: %s",
637 gnutls_strerror( i_val ) );
638 gnutls_deinit( p_sys->session.session );
639 gnutls_certificate_free_credentials( p_sys->x509_cred );
643 i_val = gnutls_certificate_type_set_priority( p_sys->session.session,
644 cert_type_priority );
647 msg_Err( p_tls, "Cannot set certificate type priorities: %s",
648 gnutls_strerror( i_val ) );
649 gnutls_deinit( p_sys->session.session );
650 gnutls_certificate_free_credentials( p_sys->x509_cred );
654 i_val = gnutls_credentials_set( p_sys->session.session,
655 GNUTLS_CRD_CERTIFICATE,
659 msg_Err( p_tls, "Cannot set TLS session credentials: %s",
660 gnutls_strerror( i_val ) );
661 gnutls_deinit( p_sys->session.session );
662 gnutls_certificate_free_credentials( p_sys->x509_cred );
669 vlc_object_detach( p_session );
670 vlc_object_destroy( p_session );
677 /*****************************************************************************
678 * TLS session resumption callbacks
679 *****************************************************************************/
680 static int cb_store( void *p_server, gnutls_datum key, gnutls_datum data )
682 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
684 if( ( p_sys->i_cache_size == 0 )
685 || ( key.size > MAX_SESSION_ID )
686 || ( data.size > MAX_SESSION_DATA ) )
689 vlc_mutex_lock( &p_sys->cache_lock );
691 memcpy( p_sys->p_store->id, key.data, key.size);
692 memcpy( p_sys->p_store->data, data.data, data.size );
693 p_sys->p_store->i_idlen = key.size;
694 p_sys->p_store->i_datalen = data.size;
697 if( ( p_sys->p_store - p_sys->p_cache ) == p_sys->i_cache_size )
698 p_sys->p_store = p_sys->p_cache;
700 vlc_mutex_unlock( &p_sys->cache_lock );
706 static const gnutls_datum err_datum = { NULL, 0 };
708 static gnutls_datum cb_fetch( void *p_server, gnutls_datum key )
710 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
711 saved_session_t *p_session, *p_end;
713 p_session = p_sys->p_cache;
714 p_end = p_session + p_sys->i_cache_size;
716 vlc_mutex_lock( &p_sys->cache_lock );
718 while( p_session < p_end )
720 if( ( p_session->i_idlen == key.size )
721 && !memcmp( p_session->id, key.data, key.size ) )
725 data.size = p_session->i_datalen;
727 data.data = gnutls_malloc( data.size );
728 if( data.data == NULL )
730 vlc_mutex_unlock( &p_sys->cache_lock );
734 memcpy( data.data, p_session->data, data.size );
735 vlc_mutex_unlock( &p_sys->cache_lock );
741 vlc_mutex_unlock( &p_sys->cache_lock );
747 static int cb_delete( void *p_server, gnutls_datum key )
749 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
750 saved_session_t *p_session, *p_end;
752 p_session = p_sys->p_cache;
753 p_end = p_session + p_sys->i_cache_size;
755 vlc_mutex_lock( &p_sys->cache_lock );
757 while( p_session < p_end )
759 if( ( p_session->i_idlen == key.size )
760 && !memcmp( p_session->id, key.data, key.size ) )
762 p_session->i_datalen = p_session->i_idlen = 0;
763 vlc_mutex_unlock( &p_sys->cache_lock );
769 vlc_mutex_unlock( &p_sys->cache_lock );
775 /*****************************************************************************
776 * tls_ServerSessionPrepare:
777 *****************************************************************************
778 * Initializes server-side TLS session data.
779 *****************************************************************************/
780 static tls_session_t *
781 gnutls_ServerSessionPrepare( tls_server_t *p_server )
783 tls_session_t *p_session;
784 tls_server_sys_t *p_server_sys;
785 gnutls_session session;
788 p_session = vlc_object_create( p_server, sizeof (struct tls_session_t) );
789 if( p_session == NULL )
792 p_session->p_sys = malloc( sizeof(struct tls_session_sys_t) );
793 if( p_session->p_sys == NULL )
795 vlc_object_destroy( p_session );
799 vlc_object_attach( p_session, p_server );
801 p_server_sys = (tls_server_sys_t *)p_server->p_sys;
802 p_session->sock.p_sys = p_session;
803 p_session->sock.pf_send = gnutls_Send;
804 p_session->sock.pf_recv = gnutls_Recv;
805 p_session->pf_handshake = gnutls_BeginHandshake;
806 p_session->pf_handshake2 = p_server_sys->pf_handshake2;
807 p_session->pf_close = gnutls_SessionClose;
809 ((tls_session_sys_t *)p_session->p_sys)->b_handshaked = VLC_FALSE;
810 ((tls_session_sys_t *)p_session->p_sys)->psz_hostname = NULL;
812 i_val = gnutls_init( &session, GNUTLS_SERVER );
815 msg_Err( p_server, "Cannot initialize TLS session: %s",
816 gnutls_strerror( i_val ) );
820 ((tls_session_sys_t *)p_session->p_sys)->session = session;
822 i_val = gnutls_set_default_priority( session );
825 msg_Err( p_server, "Cannot set ciphers priorities: %s",
826 gnutls_strerror( i_val ) );
827 gnutls_deinit( session );
831 i_val = gnutls_credentials_set( session, GNUTLS_CRD_CERTIFICATE,
832 p_server_sys->x509_cred );
835 msg_Err( p_server, "Cannot set TLS session credentials: %s",
836 gnutls_strerror( i_val ) );
837 gnutls_deinit( session );
841 if( p_session->pf_handshake2 == gnutls_HandshakeAndValidate )
842 gnutls_certificate_server_set_request( session, GNUTLS_CERT_REQUIRE );
844 gnutls_dh_set_prime_bits( session, get_Int( p_server, "gnutls-dh-bits" ) );
846 /* Session resumption support */
847 gnutls_db_set_cache_expiration( session, get_Int( p_server,
848 "gnutls-cache-expiration" ) );
849 gnutls_db_set_retrieve_function( session, cb_fetch );
850 gnutls_db_set_remove_function( session, cb_delete );
851 gnutls_db_set_store_function( session, cb_store );
852 gnutls_db_set_ptr( session, p_server );
857 free( p_session->p_sys );
858 vlc_object_detach( p_session );
859 vlc_object_destroy( p_session );
864 /*****************************************************************************
866 *****************************************************************************
867 * Releases data allocated with tls_ServerCreate.
868 *****************************************************************************/
870 gnutls_ServerDelete( tls_server_t *p_server )
872 tls_server_sys_t *p_sys;
873 p_sys = (tls_server_sys_t *)p_server->p_sys;
875 vlc_mutex_destroy( &p_sys->cache_lock );
876 free( p_sys->p_cache );
878 vlc_object_detach( p_server );
879 vlc_object_destroy( p_server );
881 /* all sessions depending on the server are now deinitialized */
882 gnutls_certificate_free_credentials( p_sys->x509_cred );
883 gnutls_dh_params_deinit( p_sys->dh_params );
888 /*****************************************************************************
890 *****************************************************************************
891 * Adds one or more certificate authorities.
892 * Returns -1 on error, 0 on success.
893 *****************************************************************************/
895 gnutls_ServerAddCA( tls_server_t *p_server, const char *psz_ca_path )
897 tls_server_sys_t *p_sys;
898 char *psz_local_path;
901 p_sys = (tls_server_sys_t *)(p_server->p_sys);
903 psz_local_path = ToLocale( psz_ca_path );
904 val = gnutls_certificate_set_x509_trust_file( p_sys->x509_cred,
906 GNUTLS_X509_FMT_PEM );
907 LocaleFree( psz_local_path );
910 msg_Err( p_server, "Cannot add trusted CA (%s): %s", psz_ca_path,
911 gnutls_strerror( val ) );
914 msg_Dbg( p_server, " %d trusted CA added (%s)", val, psz_ca_path );
916 /* enables peer's certificate verification */
917 p_sys->pf_handshake2 = gnutls_HandshakeAndValidate;
923 /*****************************************************************************
925 *****************************************************************************
926 * Adds a certificates revocation list to be sent to TLS clients.
927 * Returns -1 on error, 0 on success.
928 *****************************************************************************/
930 gnutls_ServerAddCRL( tls_server_t *p_server, const char *psz_crl_path )
933 char *psz_local_path = ToLocale( psz_crl_path );
935 val = gnutls_certificate_set_x509_crl_file( ((tls_server_sys_t *)
936 (p_server->p_sys))->x509_cred,
938 GNUTLS_X509_FMT_PEM );
939 LocaleFree( psz_crl_path );
942 msg_Err( p_server, "Cannot add CRL (%s): %s", psz_crl_path,
943 gnutls_strerror( val ) );
946 msg_Dbg( p_server, "%d CRL added (%s)", val, psz_crl_path );
951 /*****************************************************************************
953 *****************************************************************************
954 * Allocates a whole server's TLS credentials.
955 * Returns NULL on error.
956 *****************************************************************************/
957 static tls_server_t *
958 gnutls_ServerCreate( tls_t *p_tls, const char *psz_cert_path,
959 const char *psz_key_path )
961 tls_server_t *p_server;
962 tls_server_sys_t *p_sys;
963 char *psz_local_key, *psz_local_cert;
966 msg_Dbg( p_tls, "Creating TLS server" );
968 p_sys = (tls_server_sys_t *)malloc( sizeof(struct tls_server_sys_t) );
972 p_sys->i_cache_size = get_Int( p_tls, "gnutls-cache-size" );
973 p_sys->p_cache = (struct saved_session_t *)calloc( p_sys->i_cache_size,
974 sizeof( struct saved_session_t ) );
975 if( p_sys->p_cache == NULL )
980 p_sys->p_store = p_sys->p_cache;
982 p_server = vlc_object_create( p_tls, sizeof(struct tls_server_t) );
983 if( p_server == NULL )
985 free( p_sys->p_cache );
990 vlc_object_attach( p_server, p_tls );
992 p_server->p_sys = p_sys;
993 p_server->pf_delete = gnutls_ServerDelete;
994 p_server->pf_add_CA = gnutls_ServerAddCA;
995 p_server->pf_add_CRL = gnutls_ServerAddCRL;
996 p_server->pf_session_prepare = gnutls_ServerSessionPrepare;
998 /* No certificate validation by default */
999 p_sys->pf_handshake2 = gnutls_ContinueHandshake;
1001 /* FIXME: check for errors */
1002 vlc_mutex_init( p_server, &p_sys->cache_lock );
1004 /* Sets server's credentials */
1005 val = gnutls_certificate_allocate_credentials( &p_sys->x509_cred );
1008 msg_Err( p_server, "Cannot allocate X509 credentials: %s",
1009 gnutls_strerror( val ) );
1013 psz_local_cert = ToLocale( psz_cert_path );
1014 psz_local_key = ToLocale( psz_key_path );
1015 val = gnutls_certificate_set_x509_key_file( p_sys->x509_cred,
1016 psz_local_cert, psz_local_key,
1017 GNUTLS_X509_FMT_PEM );
1018 LocaleFree( psz_cert_path );
1019 LocaleFree( psz_key_path );
1022 msg_Err( p_server, "Cannot set certificate chain or private key: %s",
1023 gnutls_strerror( val ) );
1024 gnutls_certificate_free_credentials( p_sys->x509_cred );
1029 * - regenerate these regularly
1030 * - support other ciper suites
1032 val = gnutls_dh_params_init( &p_sys->dh_params );
1035 msg_Dbg( p_server, "Computing Diffie Hellman ciphers parameters" );
1036 val = gnutls_dh_params_generate2( p_sys->dh_params,
1037 get_Int( p_tls, "gnutls-dh-bits" ) );
1041 msg_Err( p_server, "Cannot initialize DH cipher suites: %s",
1042 gnutls_strerror( val ) );
1043 gnutls_certificate_free_credentials( p_sys->x509_cred );
1046 msg_Dbg( p_server, "Ciphers parameters computed" );
1048 gnutls_certificate_set_dh_params( p_sys->x509_cred, p_sys->dh_params);
1053 vlc_mutex_destroy( &p_sys->cache_lock );
1054 vlc_object_detach( p_server );
1055 vlc_object_destroy( p_server );
1061 /*****************************************************************************
1062 * gcrypt thread option VLC implementation:
1063 *****************************************************************************/
1064 vlc_object_t *__p_gcry_data;
1066 static int gcry_vlc_mutex_init( void **p_sys )
1069 vlc_mutex_t *p_lock = (vlc_mutex_t *)malloc( sizeof( vlc_mutex_t ) );
1074 i_val = vlc_mutex_init( __p_gcry_data, p_lock );
1082 static int gcry_vlc_mutex_destroy( void **p_sys )
1085 vlc_mutex_t *p_lock = (vlc_mutex_t *)*p_sys;
1087 i_val = vlc_mutex_destroy( p_lock );
1092 static int gcry_vlc_mutex_lock( void **p_sys )
1094 return vlc_mutex_lock( (vlc_mutex_t *)*p_sys );
1097 static int gcry_vlc_mutex_unlock( void **lock )
1099 return vlc_mutex_unlock( (vlc_mutex_t *)*lock );
1102 static struct gcry_thread_cbs gcry_threads_vlc =
1104 GCRY_THREAD_OPTION_USER,
1106 gcry_vlc_mutex_init,
1107 gcry_vlc_mutex_destroy,
1108 gcry_vlc_mutex_lock,
1109 gcry_vlc_mutex_unlock
1113 /*****************************************************************************
1114 * Module initialization
1115 *****************************************************************************/
1117 Open( vlc_object_t *p_this )
1119 tls_t *p_tls = (tls_t *)p_this;
1121 vlc_value_t lock, count;
1123 var_Create( p_this->p_libvlc, "gnutls_mutex", VLC_VAR_MUTEX );
1124 var_Get( p_this->p_libvlc, "gnutls_mutex", &lock );
1125 vlc_mutex_lock( lock.p_address );
1127 /* Initialize GnuTLS only once */
1128 var_Create( p_this->p_libvlc, "gnutls_count", VLC_VAR_INTEGER );
1129 var_Get( p_this->p_libvlc, "gnutls_count", &count);
1131 if( count.i_int == 0)
1133 const char *psz_version;
1135 __p_gcry_data = VLC_OBJECT( p_this->p_vlc );
1137 gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_vlc);
1138 if( gnutls_global_init( ) )
1140 msg_Warn( p_this, "cannot initialize GnuTLS" );
1141 vlc_mutex_unlock( lock.p_address );
1142 return VLC_EGENERIC;
1145 * FIXME: in fact, we currently depends on 1.0.17, but it breaks on
1146 * Debian which as a patched 1.0.16 (which we can use).
1148 psz_version = gnutls_check_version( "1.0.16" );
1149 if( psz_version == NULL )
1151 gnutls_global_deinit( );
1152 vlc_mutex_unlock( lock.p_address );
1153 msg_Err( p_this, "unsupported GnuTLS version" );
1154 return VLC_EGENERIC;
1156 msg_Dbg( p_this, "GnuTLS v%s initialized", psz_version );
1160 var_Set( p_this->p_libvlc, "gnutls_count", count);
1161 vlc_mutex_unlock( lock.p_address );
1163 p_tls->pf_server_create = gnutls_ServerCreate;
1164 p_tls->pf_client_create = gnutls_ClientCreate;
1169 /*****************************************************************************
1170 * Module deinitialization
1171 *****************************************************************************/
1173 Close( vlc_object_t *p_this )
1175 /*tls_t *p_tls = (tls_t *)p_this;
1176 tls_sys_t *p_sys = (tls_sys_t *)(p_this->p_sys);*/
1178 vlc_value_t lock, count;
1180 var_Create( p_this->p_libvlc, "gnutls_mutex", VLC_VAR_MUTEX );
1181 var_Get( p_this->p_libvlc, "gnutls_mutex", &lock );
1182 vlc_mutex_lock( lock.p_address );
1184 var_Create( p_this->p_libvlc, "gnutls_count", VLC_VAR_INTEGER );
1185 var_Get( p_this->p_libvlc, "gnutls_count", &count);
1187 var_Set( p_this->p_libvlc, "gnutls_count", count);
1189 if( count.i_int == 0 )
1191 gnutls_global_deinit( );
1192 msg_Dbg( p_this, "GnuTLS deinitialized" );
1195 vlc_mutex_unlock( lock.p_address );