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 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
33 #include <sys/types.h>
38 #ifdef HAVE_SYS_STAT_H
39 # include <sys/stat.h>
50 #include <gnutls/gnutls.h>
51 #include <gnutls/x509.h>
54 #define CACHE_EXPIRATION 3600
57 /*****************************************************************************
59 *****************************************************************************/
60 static int Open ( vlc_object_t * );
61 static void Close( vlc_object_t * );
63 #define DH_BITS_TEXT N_("Diffie-Hellman prime bits")
64 #define DH_BITS_LONGTEXT N_( \
65 "This allows you to modify the Diffie-Hellman prime's number of bits, " \
66 "used for TLS or SSL-based server-side encryption. This is generally " \
69 #define CACHE_EXPIRATION_TEXT N_("Expiration time for resumed TLS sessions")
70 #define CACHE_EXPIRATION_LONGTEXT N_( \
71 "It is possible to cache the resumed TLS sessions. This is the expiration "\
72 "time of the sessions stored in this cache, in seconds." )
74 #define CACHE_SIZE_TEXT N_("Number of resumed TLS sessions")
75 #define CACHE_SIZE_LONGTEXT N_( \
76 "This is the maximum number of resumed TLS sessions that " \
77 "the cache will hold." )
79 #define CHECK_CERT_TEXT N_("Check TLS/SSL server certificate validity")
80 #define CHECK_CERT_LONGTEXT N_( \
81 "This ensures that the server certificate is valid " \
82 "(i.e. signed by an approved Certification Authority)." )
84 #define CHECK_HOSTNAME_TEXT N_("Check TLS/SSL server hostname in certificate")
85 #define CHECK_HOSTNAME_LONGTEXT N_( \
86 "This ensures that the server hostname in certificate matches the " \
87 "requested host name." )
90 set_shortname( "GnuTLS" );
91 set_description( _("GnuTLS TLS encryption layer") );
92 set_capability( "tls", 1 );
93 set_callbacks( Open, Close );
94 set_category( CAT_ADVANCED );
95 set_subcategory( SUBCAT_ADVANCED_MISC );
97 add_bool( "tls-check-cert", VLC_TRUE, NULL, CHECK_CERT_TEXT,
98 CHECK_CERT_LONGTEXT, VLC_FALSE );
99 add_bool( "tls-check-hostname", VLC_TRUE, NULL, CHECK_HOSTNAME_TEXT,
100 CHECK_HOSTNAME_LONGTEXT, VLC_FALSE );
102 add_integer( "gnutls-dh-bits", DH_BITS, NULL, DH_BITS_TEXT,
103 DH_BITS_LONGTEXT, VLC_TRUE );
104 add_integer( "gnutls-cache-expiration", CACHE_EXPIRATION, NULL,
105 CACHE_EXPIRATION_TEXT, CACHE_EXPIRATION_LONGTEXT, VLC_TRUE );
106 add_integer( "gnutls-cache-size", CACHE_SIZE, NULL, CACHE_SIZE_TEXT,
107 CACHE_SIZE_LONGTEXT, VLC_TRUE );
111 #define MAX_SESSION_ID 32
112 #define MAX_SESSION_DATA 1024
114 typedef struct saved_session_t
116 char id[MAX_SESSION_ID];
117 char data[MAX_SESSION_DATA];
124 typedef struct tls_server_sys_t
126 gnutls_certificate_credentials x509_cred;
127 gnutls_dh_params dh_params;
129 struct saved_session_t *p_cache;
130 struct saved_session_t *p_store;
132 vlc_mutex_t cache_lock;
134 int (*pf_handshake2)( tls_session_t * );
138 typedef struct tls_session_sys_t
140 gnutls_session session;
142 vlc_bool_t b_handshaked;
146 typedef struct tls_client_sys_t
148 struct tls_session_sys_t session;
149 gnutls_certificate_credentials x509_cred;
154 _get_Int( vlc_object_t *p_this, const char *var )
158 if( var_Get( p_this, var, &value ) != VLC_SUCCESS )
160 var_Create( p_this, var, VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
161 var_Get( p_this, var, &value );
168 _get_Bool( vlc_object_t *p_this, const char *var )
172 if( var_Get( p_this, var, &value ) != VLC_SUCCESS )
174 var_Create( p_this, var, VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
175 var_Get( p_this, var, &value );
181 #define get_Int( a, b ) _get_Int( (vlc_object_t *)(a), (b) )
182 #define get_Bool( a, b ) _get_Bool( (vlc_object_t *)(a), (b) )
186 * Sends data through a TLS session.
189 gnutls_Send( void *p_session, const void *buf, int i_length )
192 tls_session_sys_t *p_sys;
194 p_sys = (tls_session_sys_t *)(((tls_session_t *)p_session)->p_sys);
196 val = gnutls_record_send( p_sys->session, buf, i_length );
197 /* TODO: handle fatal error */
198 return val < 0 ? -1 : val;
203 * Receives data through a TLS session.
206 gnutls_Recv( void *p_session, void *buf, int i_length )
209 tls_session_sys_t *p_sys;
211 p_sys = (tls_session_sys_t *)(((tls_session_t *)p_session)->p_sys);
213 val = gnutls_record_recv( p_sys->session, buf, i_length );
214 /* TODO: handle fatal error */
215 return val < 0 ? -1 : val;
219 /*****************************************************************************
220 * tls_Session(Continue)?Handshake:
221 *****************************************************************************
222 * Establishes TLS session with a peer through socket <fd>.
223 * Returns -1 on error (you need not and must not call tls_SessionClose)
224 * 0 on succesful handshake completion, 1 if more would-be blocking recv is
225 * needed, 2 if more would-be blocking send is required.
226 *****************************************************************************/
228 gnutls_ContinueHandshake( tls_session_t *p_session)
230 tls_session_sys_t *p_sys;
233 p_sys = (tls_session_sys_t *)(p_session->p_sys);
235 /* TODO: handle fatal error */
237 WSASetLastError( 0 );
239 val = gnutls_handshake( p_sys->session );
240 if( ( val == GNUTLS_E_AGAIN ) || ( val == GNUTLS_E_INTERRUPTED ) )
241 return 1 + gnutls_record_get_direction( p_sys->session );
246 msg_Dbg( p_session, "Winsock error %d", WSAGetLastError( ) );
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;
265 static const error_msg_t cert_errors[] =
267 { GNUTLS_CERT_INVALID,
268 "Certificate could not be verified" },
269 { GNUTLS_CERT_REVOKED,
270 "Certificate was revoked" },
271 { GNUTLS_CERT_SIGNER_NOT_FOUND,
272 "Certificate's signer was not found" },
273 { GNUTLS_CERT_SIGNER_NOT_CA,
274 "Certificate's signer is not a CA" },
275 { GNUTLS_CERT_INSECURE_ALGORITHM,
276 "Insecure certificate signature algorithm" },
282 gnutls_HandshakeAndValidate( tls_session_t *session )
284 int val = gnutls_ContinueHandshake( session );
288 tls_session_sys_t *p_sys = (tls_session_sys_t *)(session->p_sys);
290 /* certificates chain verification */
292 val = gnutls_certificate_verify_peers2( p_sys->session, &status );
296 msg_Err( session, "Certificate verification failed: %s",
297 gnutls_strerror( val ) );
303 msg_Err( session, "TLS session: access denied" );
304 for( const error_msg_t *e = cert_errors; e->flag; e++ )
306 if( status & e->flag )
308 msg_Err( session, e->msg );
315 "unknown certificate error (you found a bug in VLC)" );
320 /* certificate (host)name verification */
321 const gnutls_datum *data = gnutls_certificate_get_peers( p_sys->session,
325 msg_Err( session, "Peer certificate not available" );
329 gnutls_x509_crt cert;
330 val = gnutls_x509_crt_init( &cert );
333 msg_Err( session, "x509 fatal error: %s", gnutls_strerror( val ) );
337 val = gnutls_x509_crt_import( cert, data, GNUTLS_X509_FMT_DER );
340 msg_Err( session, "Certificate import error: %s",
341 gnutls_strerror( val ) );
342 gnutls_x509_crt_deinit( cert );
346 if( p_sys->psz_hostname != NULL )
348 if ( !gnutls_x509_crt_check_hostname( cert, p_sys->psz_hostname ) )
350 msg_Err( session, "Certificate does not match \"%s\"",
351 p_sys->psz_hostname );
356 msg_Warn( session, "Certificate and hostname were not verified" );
358 if( gnutls_x509_crt_get_expiration_time( cert ) < time( NULL ) )
360 msg_Err( session, "Certificate expired" );
364 if( gnutls_x509_crt_get_activation_time( cert ) > time ( NULL ) )
366 msg_Err( session, "Certificate not yet valid" );
370 gnutls_x509_crt_deinit( cert );
371 msg_Dbg( session, "TLS/x509 certificate verified" );
375 gnutls_x509_crt_deinit( cert );
377 session->pf_close( session );
382 * Starts negociation of a TLS session.
384 * @param fd stream socket already connected with the peer.
385 * @param psz_hostname if not NULL, hostname to mention as a Server Name.
387 * @return -1 on error (you need not and must not call tls_SessionClose),
388 * 0 on succesful handshake completion, 1 if more would-be blocking recv is
389 * needed, 2 if more would-be blocking send is required.
392 gnutls_BeginHandshake( tls_session_t *p_session, int fd,
393 const char *psz_hostname )
395 tls_session_sys_t *p_sys;
397 p_sys = (tls_session_sys_t *)(p_session->p_sys);
399 gnutls_transport_set_ptr (p_sys->session, (gnutls_transport_ptr)(intptr_t)fd);
401 if( psz_hostname != NULL )
403 gnutls_server_name_set( p_sys->session, GNUTLS_NAME_DNS, psz_hostname,
404 strlen( psz_hostname ) );
405 if( get_Bool( p_session, "tls-check-hostname" ) )
407 p_sys->psz_hostname = strdup( psz_hostname );
408 if( p_sys->psz_hostname == NULL )
410 p_session->pf_close( p_session );
416 return p_session->pf_handshake2( p_session );
420 * Terminates TLS session and releases session data.
421 * You still have to close the socket yourself.
424 gnutls_SessionClose( tls_session_t *p_session )
426 tls_session_sys_t *p_sys;
428 p_sys = (tls_session_sys_t *)(p_session->p_sys);
430 if( p_sys->b_handshaked == VLC_TRUE )
431 gnutls_bye( p_sys->session, GNUTLS_SHUT_WR );
432 gnutls_deinit( p_sys->session );
434 if( p_sys->psz_hostname != NULL )
435 free( p_sys->psz_hostname );
437 vlc_object_detach( p_session );
438 vlc_object_destroy( p_session );
444 gnutls_ClientDelete( tls_session_t *p_session )
446 /* On the client-side, credentials are re-allocated per session */
447 gnutls_certificate_credentials x509_cred =
448 ((tls_client_sys_t *)(p_session->p_sys))->x509_cred;
450 gnutls_SessionClose( p_session );
452 /* credentials must be free'd *after* gnutls_deinit() */
453 gnutls_certificate_free_credentials( x509_cred );
458 gnutls_Addx509File( vlc_object_t *p_this,
459 gnutls_certificate_credentials cred,
460 const char *psz_path, vlc_bool_t b_priv );
463 gnutls_Addx509Directory( vlc_object_t *p_this,
464 gnutls_certificate_credentials cred,
465 const char *psz_dirname,
469 const char *psz_dirent;
471 if( *psz_dirname == '\0' )
474 dir = utf8_opendir( psz_dirname );
477 msg_Warn( p_this, "cannot open directory (%s): %s", psz_dirname,
484 struct stat st1, st2;
485 int fd = dirfd( dir );
488 * Gets stats for the directory path, checks that it is not a
489 * symbolic link (to avoid possibly infinite recursion), and verifies
490 * that the inode is still the same, to avoid TOCTOU race condition.
493 || fstat( fd, &st1 ) || utf8_lstat( psz_dirname, &st2 )
494 || S_ISLNK( st2.st_mode ) || ( st1.st_ino != st2.st_ino ) )
502 while( ( psz_dirent = utf8_readdir( dir ) ) != NULL )
507 if( (psz_dirent == NULL)
508 || ( strcmp( ".", psz_dirent ) == 0 )
509 || ( strcmp( "..", psz_dirent ) == 0 ) )
512 check = asprintf( &psz_filename, "%s/%s", psz_dirname, psz_dirent );
517 gnutls_Addx509File( p_this, cred, psz_filename, b_priv );
518 free( psz_filename );
527 gnutls_Addx509File( vlc_object_t *p_this,
528 gnutls_certificate_credentials cred,
529 const char *psz_path, vlc_bool_t b_priv )
533 if( utf8_stat( psz_path, &st ) == 0 )
535 if( S_ISREG( st.st_mode ) )
537 char *psz_localname = ToLocale( psz_path );
539 ? gnutls_certificate_set_x509_key_file( cred,
540 psz_localname, psz_localname, GNUTLS_X509_FMT_PEM )
541 : gnutls_certificate_set_x509_trust_file( cred,
542 psz_localname, GNUTLS_X509_FMT_PEM );
543 LocaleFree( psz_localname );
547 msg_Warn( p_this, "cannot add x509 credentials (%s): %s",
548 psz_path, gnutls_strerror( i ) );
553 msg_Dbg( p_this, "added x509 credentials (%s)",
558 else if( S_ISDIR( st.st_mode ) )
561 "looking recursively for x509 credentials in %s",
563 return gnutls_Addx509Directory( p_this, cred, psz_path, b_priv);
567 msg_Warn( p_this, "cannot add x509 credentials (%s): %s",
568 psz_path, strerror( errno ) );
574 * Initializes a client-side TLS session.
576 static tls_session_t *
577 gnutls_ClientCreate( tls_t *p_tls )
579 tls_session_t *p_session = NULL;
580 tls_client_sys_t *p_sys = NULL;
582 const int cert_type_priority[3] =
588 p_sys = (tls_client_sys_t *)malloc( sizeof(struct tls_client_sys_t) );
592 p_session = (struct tls_session_t *)vlc_object_create ( p_tls, sizeof(struct tls_session_t) );
593 if( p_session == NULL )
599 p_session->p_sys = p_sys;
600 p_session->sock.p_sys = p_session;
601 p_session->sock.pf_send = gnutls_Send;
602 p_session->sock.pf_recv = gnutls_Recv;
603 p_session->pf_handshake = gnutls_BeginHandshake;
604 p_session->pf_close = gnutls_ClientDelete;
606 p_sys->session.b_handshaked = VLC_FALSE;
607 p_sys->session.psz_hostname = NULL;
609 vlc_object_attach( p_session, p_tls );
611 i_val = gnutls_certificate_allocate_credentials( &p_sys->x509_cred );
614 msg_Err( p_tls, "cannot allocate X509 credentials: %s",
615 gnutls_strerror( i_val ) );
619 if( get_Bool( p_tls, "tls-check-cert" ) )
623 if( asprintf( &psz_path, "%s/"CONFIG_DIR"/ssl/certs",
624 p_tls->p_libvlc->psz_homedir ) != -1 )
626 gnutls_Addx509Directory( (vlc_object_t *)p_session,
627 p_sys->x509_cred, psz_path, VLC_FALSE );
631 if( asprintf( &psz_path, "%s/ca-certificates.crt",
632 config_GetDataDir ( (vlc_object_t *)p_session) ) != -1 )
634 gnutls_Addx509File( (vlc_object_t *)p_session,
635 p_sys->x509_cred, psz_path, VLC_FALSE );
638 p_session->pf_handshake2 = gnutls_HandshakeAndValidate;
641 p_session->pf_handshake2 = gnutls_ContinueHandshake;
646 if( asprintf( &psz_path, "%s/"CONFIG_DIR"/ssl/private",
647 p_tls->p_libvlc->psz_homedir ) == -1 )
649 gnutls_certificate_free_credentials( p_sys->x509_cred );
653 gnutls_Addx509Directory( (vlc_object_t *)p_session, p_sys->x509_cred,
654 psz_path, VLC_TRUE );
659 i_val = gnutls_init( &p_sys->session.session, GNUTLS_CLIENT );
662 msg_Err( p_tls, "cannot initialize TLS session: %s",
663 gnutls_strerror( i_val ) );
664 gnutls_certificate_free_credentials( p_sys->x509_cred );
668 i_val = gnutls_set_default_priority( p_sys->session.session );
671 msg_Err( p_tls, "cannot set ciphers priorities: %s",
672 gnutls_strerror( i_val ) );
673 gnutls_deinit( p_sys->session.session );
674 gnutls_certificate_free_credentials( p_sys->x509_cred );
678 i_val = gnutls_certificate_type_set_priority( p_sys->session.session,
679 cert_type_priority );
682 msg_Err( p_tls, "cannot set certificate type priorities: %s",
683 gnutls_strerror( i_val ) );
684 gnutls_deinit( p_sys->session.session );
685 gnutls_certificate_free_credentials( p_sys->x509_cred );
689 i_val = gnutls_credentials_set( p_sys->session.session,
690 GNUTLS_CRD_CERTIFICATE,
694 msg_Err( p_tls, "cannot set TLS session credentials: %s",
695 gnutls_strerror( i_val ) );
696 gnutls_deinit( p_sys->session.session );
697 gnutls_certificate_free_credentials( p_sys->x509_cred );
704 vlc_object_detach( p_session );
705 vlc_object_destroy( p_session );
713 * TLS session resumption callbacks (server-side)
715 static int cb_store( void *p_server, gnutls_datum key, gnutls_datum data )
717 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
719 if( ( p_sys->i_cache_size == 0 )
720 || ( key.size > MAX_SESSION_ID )
721 || ( data.size > MAX_SESSION_DATA ) )
724 vlc_mutex_lock( &p_sys->cache_lock );
726 memcpy( p_sys->p_store->id, key.data, key.size);
727 memcpy( p_sys->p_store->data, data.data, data.size );
728 p_sys->p_store->i_idlen = key.size;
729 p_sys->p_store->i_datalen = data.size;
732 if( ( p_sys->p_store - p_sys->p_cache ) == p_sys->i_cache_size )
733 p_sys->p_store = p_sys->p_cache;
735 vlc_mutex_unlock( &p_sys->cache_lock );
741 static const gnutls_datum err_datum = { NULL, 0 };
743 static gnutls_datum cb_fetch( void *p_server, gnutls_datum key )
745 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
746 saved_session_t *p_session, *p_end;
748 p_session = p_sys->p_cache;
749 p_end = p_session + p_sys->i_cache_size;
751 vlc_mutex_lock( &p_sys->cache_lock );
753 while( p_session < p_end )
755 if( ( p_session->i_idlen == key.size )
756 && !memcmp( p_session->id, key.data, key.size ) )
760 data.size = p_session->i_datalen;
762 data.data = gnutls_malloc( data.size );
763 if( data.data == NULL )
765 vlc_mutex_unlock( &p_sys->cache_lock );
769 memcpy( data.data, p_session->data, data.size );
770 vlc_mutex_unlock( &p_sys->cache_lock );
776 vlc_mutex_unlock( &p_sys->cache_lock );
782 static int cb_delete( void *p_server, gnutls_datum key )
784 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
785 saved_session_t *p_session, *p_end;
787 p_session = p_sys->p_cache;
788 p_end = p_session + p_sys->i_cache_size;
790 vlc_mutex_lock( &p_sys->cache_lock );
792 while( p_session < p_end )
794 if( ( p_session->i_idlen == key.size )
795 && !memcmp( p_session->id, key.data, key.size ) )
797 p_session->i_datalen = p_session->i_idlen = 0;
798 vlc_mutex_unlock( &p_sys->cache_lock );
804 vlc_mutex_unlock( &p_sys->cache_lock );
811 * Initializes a server-side TLS session.
813 static tls_session_t *
814 gnutls_ServerSessionPrepare( tls_server_t *p_server )
816 tls_session_t *p_session;
817 tls_server_sys_t *p_server_sys;
818 gnutls_session session;
821 p_session = vlc_object_create( p_server, sizeof (struct tls_session_t) );
822 if( p_session == NULL )
825 p_session->p_sys = malloc( sizeof(struct tls_session_sys_t) );
826 if( p_session->p_sys == NULL )
828 vlc_object_destroy( p_session );
832 vlc_object_attach( p_session, p_server );
834 p_server_sys = (tls_server_sys_t *)p_server->p_sys;
835 p_session->sock.p_sys = p_session;
836 p_session->sock.pf_send = gnutls_Send;
837 p_session->sock.pf_recv = gnutls_Recv;
838 p_session->pf_handshake = gnutls_BeginHandshake;
839 p_session->pf_handshake2 = p_server_sys->pf_handshake2;
840 p_session->pf_close = gnutls_SessionClose;
842 ((tls_session_sys_t *)p_session->p_sys)->b_handshaked = VLC_FALSE;
843 ((tls_session_sys_t *)p_session->p_sys)->psz_hostname = NULL;
845 i_val = gnutls_init( &session, GNUTLS_SERVER );
848 msg_Err( p_server, "cannot initialize TLS session: %s",
849 gnutls_strerror( i_val ) );
853 ((tls_session_sys_t *)p_session->p_sys)->session = session;
855 i_val = gnutls_set_default_priority( session );
858 msg_Err( p_server, "cannot set ciphers priorities: %s",
859 gnutls_strerror( i_val ) );
860 gnutls_deinit( session );
864 i_val = gnutls_credentials_set( session, GNUTLS_CRD_CERTIFICATE,
865 p_server_sys->x509_cred );
868 msg_Err( p_server, "cannot set TLS session credentials: %s",
869 gnutls_strerror( i_val ) );
870 gnutls_deinit( session );
874 if( p_session->pf_handshake2 == gnutls_HandshakeAndValidate )
875 gnutls_certificate_server_set_request( session, GNUTLS_CERT_REQUIRE );
877 gnutls_dh_set_prime_bits( session, get_Int( p_server, "gnutls-dh-bits" ) );
879 /* Session resumption support */
880 gnutls_db_set_cache_expiration( session, get_Int( p_server,
881 "gnutls-cache-expiration" ) );
882 gnutls_db_set_retrieve_function( session, cb_fetch );
883 gnutls_db_set_remove_function( session, cb_delete );
884 gnutls_db_set_store_function( session, cb_store );
885 gnutls_db_set_ptr( session, p_server );
890 free( p_session->p_sys );
891 vlc_object_detach( p_session );
892 vlc_object_destroy( p_session );
898 * Releases data allocated with tls_ServerCreate().
901 gnutls_ServerDelete( tls_server_t *p_server )
903 tls_server_sys_t *p_sys;
904 p_sys = (tls_server_sys_t *)p_server->p_sys;
906 vlc_mutex_destroy( &p_sys->cache_lock );
907 free( p_sys->p_cache );
909 vlc_object_detach( p_server );
910 vlc_object_destroy( p_server );
912 /* all sessions depending on the server are now deinitialized */
913 gnutls_certificate_free_credentials( p_sys->x509_cred );
914 gnutls_dh_params_deinit( p_sys->dh_params );
920 * Adds one or more certificate authorities.
922 * @param psz_ca_path (Unicode) path to an x509 certificates list.
924 * @return -1 on error, 0 on success.
925 *****************************************************************************/
927 gnutls_ServerAddCA( tls_server_t *p_server, const char *psz_ca_path )
929 tls_server_sys_t *p_sys;
930 char *psz_local_path;
933 p_sys = (tls_server_sys_t *)(p_server->p_sys);
935 psz_local_path = ToLocale( psz_ca_path );
936 val = gnutls_certificate_set_x509_trust_file( p_sys->x509_cred,
938 GNUTLS_X509_FMT_PEM );
939 LocaleFree( psz_local_path );
942 msg_Err( p_server, "cannot add trusted CA (%s): %s", psz_ca_path,
943 gnutls_strerror( val ) );
946 msg_Dbg( p_server, " %d trusted CA added (%s)", val, psz_ca_path );
948 /* enables peer's certificate verification */
949 p_sys->pf_handshake2 = gnutls_HandshakeAndValidate;
956 * Adds a certificates revocation list to be sent to TLS clients.
958 * @param psz_crl_path (Unicode) path of the CRL file.
960 * @return -1 on error, 0 on success.
963 gnutls_ServerAddCRL( tls_server_t *p_server, const char *psz_crl_path )
966 char *psz_local_path = ToLocale( psz_crl_path );
968 val = gnutls_certificate_set_x509_crl_file( ((tls_server_sys_t *)
969 (p_server->p_sys))->x509_cred,
971 GNUTLS_X509_FMT_PEM );
972 LocaleFree( psz_crl_path );
975 msg_Err( p_server, "cannot add CRL (%s): %s", psz_crl_path,
976 gnutls_strerror( val ) );
979 msg_Dbg( p_server, "%d CRL added (%s)", val, psz_crl_path );
985 * Allocates a whole server's TLS credentials.
987 * @return NULL on error.
989 static tls_server_t *
990 gnutls_ServerCreate( tls_t *p_tls, const char *psz_cert_path,
991 const char *psz_key_path )
993 tls_server_t *p_server;
994 tls_server_sys_t *p_sys;
995 char *psz_local_key, *psz_local_cert;
998 msg_Dbg( p_tls, "creating TLS server" );
1000 p_sys = (tls_server_sys_t *)malloc( sizeof(struct tls_server_sys_t) );
1004 p_sys->i_cache_size = get_Int( p_tls, "gnutls-cache-size" );
1005 p_sys->p_cache = (struct saved_session_t *)calloc( p_sys->i_cache_size,
1006 sizeof( struct saved_session_t ) );
1007 if( p_sys->p_cache == NULL )
1012 p_sys->p_store = p_sys->p_cache;
1014 p_server = vlc_object_create( p_tls, sizeof(struct tls_server_t) );
1015 if( p_server == NULL )
1017 free( p_sys->p_cache );
1022 vlc_object_attach( p_server, p_tls );
1024 p_server->p_sys = p_sys;
1025 p_server->pf_delete = gnutls_ServerDelete;
1026 p_server->pf_add_CA = gnutls_ServerAddCA;
1027 p_server->pf_add_CRL = gnutls_ServerAddCRL;
1028 p_server->pf_session_prepare = gnutls_ServerSessionPrepare;
1030 /* No certificate validation by default */
1031 p_sys->pf_handshake2 = gnutls_ContinueHandshake;
1033 vlc_mutex_init( p_server, &p_sys->cache_lock );
1035 /* Sets server's credentials */
1036 val = gnutls_certificate_allocate_credentials( &p_sys->x509_cred );
1039 msg_Err( p_server, "cannot allocate X509 credentials: %s",
1040 gnutls_strerror( val ) );
1044 psz_local_cert = ToLocale( psz_cert_path );
1045 psz_local_key = ToLocale( psz_key_path );
1046 val = gnutls_certificate_set_x509_key_file( p_sys->x509_cred,
1047 psz_local_cert, psz_local_key,
1048 GNUTLS_X509_FMT_PEM );
1049 LocaleFree( psz_cert_path );
1050 LocaleFree( psz_key_path );
1053 msg_Err( p_server, "cannot set certificate chain or private key: %s",
1054 gnutls_strerror( val ) );
1055 gnutls_certificate_free_credentials( p_sys->x509_cred );
1060 * - regenerate these regularly
1061 * - support other ciper suites
1063 val = gnutls_dh_params_init( &p_sys->dh_params );
1066 msg_Dbg( p_server, "computing Diffie Hellman ciphers parameters" );
1067 val = gnutls_dh_params_generate2( p_sys->dh_params,
1068 get_Int( p_tls, "gnutls-dh-bits" ) );
1072 msg_Err( p_server, "cannot initialize DH cipher suites: %s",
1073 gnutls_strerror( val ) );
1074 gnutls_certificate_free_credentials( p_sys->x509_cred );
1077 msg_Dbg( p_server, "ciphers parameters computed" );
1079 gnutls_certificate_set_dh_params( p_sys->x509_cred, p_sys->dh_params);
1084 vlc_mutex_destroy( &p_sys->cache_lock );
1085 vlc_object_detach( p_server );
1086 vlc_object_destroy( p_server );
1092 #ifdef LIBVLC_USE_PTHREAD
1093 GCRY_THREAD_OPTION_PTHREAD_IMPL;
1094 # define gcry_threads_vlc gcry_threads_pthread
1097 * gcrypt thread option VLC implementation
1100 # define NEED_THREAD_CONTEXT 1
1101 static vlc_object_t *__p_gcry_data;
1103 static int gcry_vlc_mutex_init( void **p_sys )
1106 vlc_mutex_t *p_lock = (vlc_mutex_t *)malloc( sizeof( vlc_mutex_t ) );
1111 i_val = vlc_mutex_init( __p_gcry_data, p_lock );
1119 static int gcry_vlc_mutex_destroy( void **p_sys )
1122 vlc_mutex_t *p_lock = (vlc_mutex_t *)*p_sys;
1124 i_val = vlc_mutex_destroy( p_lock );
1129 static int gcry_vlc_mutex_lock( void **p_sys )
1131 return vlc_mutex_lock( (vlc_mutex_t *)*p_sys );
1134 static int gcry_vlc_mutex_unlock( void **lock )
1136 return vlc_mutex_unlock( (vlc_mutex_t *)*lock );
1139 static struct gcry_thread_cbs gcry_threads_vlc =
1141 GCRY_THREAD_OPTION_USER,
1143 gcry_vlc_mutex_init,
1144 gcry_vlc_mutex_destroy,
1145 gcry_vlc_mutex_lock,
1146 gcry_vlc_mutex_unlock
1151 /*****************************************************************************
1152 * Module initialization
1153 *****************************************************************************/
1155 Open( vlc_object_t *p_this )
1157 tls_t *p_tls = (tls_t *)p_this;
1159 vlc_value_t lock, count;
1161 var_Create( p_this->p_libvlc_global, "gnutls_mutex", VLC_VAR_MUTEX );
1162 var_Get( p_this->p_libvlc_global, "gnutls_mutex", &lock );
1163 vlc_mutex_lock( lock.p_address );
1165 /* Initialize GnuTLS only once */
1166 var_Create( p_this->p_libvlc_global, "gnutls_count", VLC_VAR_INTEGER );
1167 var_Get( p_this->p_libvlc_global, "gnutls_count", &count);
1169 if( count.i_int == 0)
1171 #ifdef NEED_THREAD_CONTEXT
1172 __p_gcry_data = VLC_OBJECT( p_this->p_libvlc );
1175 gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_vlc);
1176 if( gnutls_global_init( ) )
1178 msg_Warn( p_this, "cannot initialize GnuTLS" );
1179 vlc_mutex_unlock( lock.p_address );
1180 return VLC_EGENERIC;
1183 const char *psz_version = gnutls_check_version( "1.2.9" );
1184 if( psz_version == NULL )
1186 gnutls_global_deinit( );
1187 vlc_mutex_unlock( lock.p_address );
1188 msg_Err( p_this, "unsupported GnuTLS version" );
1189 return VLC_EGENERIC;
1191 msg_Dbg( p_this, "GnuTLS v%s initialized", psz_version );
1195 var_Set( p_this->p_libvlc_global, "gnutls_count", count);
1196 vlc_mutex_unlock( lock.p_address );
1198 p_tls->pf_server_create = gnutls_ServerCreate;
1199 p_tls->pf_client_create = gnutls_ClientCreate;
1204 /*****************************************************************************
1205 * Module deinitialization
1206 *****************************************************************************/
1208 Close( vlc_object_t *p_this )
1210 /*tls_t *p_tls = (tls_t *)p_this;
1211 tls_sys_t *p_sys = (tls_sys_t *)(p_this->p_sys);*/
1213 vlc_value_t lock, count;
1215 var_Create( p_this->p_libvlc_global, "gnutls_mutex", VLC_VAR_MUTEX );
1216 var_Get( p_this->p_libvlc_global, "gnutls_mutex", &lock );
1217 vlc_mutex_lock( lock.p_address );
1219 var_Create( p_this->p_libvlc_global, "gnutls_count", VLC_VAR_INTEGER );
1220 var_Get( p_this->p_libvlc_global, "gnutls_count", &count);
1222 var_Set( p_this->p_libvlc_global, "gnutls_count", count);
1224 if( count.i_int == 0 )
1226 gnutls_global_deinit( );
1227 msg_Dbg( p_this, "GnuTLS deinitialized" );
1230 vlc_mutex_unlock( lock.p_address );