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/ca-certificates.crt"
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_VerifyHostname( vlc_object_t *p_this, gnutls_session session,
266 const char *psz_hostname )
268 const gnutls_datum *p_data;
269 gnutls_x509_crt cert;
273 /* certificate (host)name verification */
274 p_data = gnutls_certificate_get_peers( session, &status );
277 msg_Err( p_this, "TLS peer certificate not available" );
281 val = gnutls_x509_crt_init( &cert );
284 msg_Err( p_this, "x509 fatal error: %s", gnutls_strerror( val ) );
288 val = gnutls_x509_crt_import( cert, p_data, GNUTLS_X509_FMT_DER );
291 msg_Err( p_this, "x509 certificate import error: %s",
292 gnutls_strerror( val ) );
293 gnutls_x509_crt_deinit( cert );
297 if( gnutls_x509_crt_check_hostname( cert, psz_hostname ) == 0 )
299 msg_Err( p_this, "x509 certificate does not match \"%s\"",
301 gnutls_x509_crt_deinit( cert );
305 gnutls_x509_crt_deinit( cert );
306 msg_Dbg( p_this, "x509 hostname matches %s", psz_hostname );
311 gnutls_HandshakeAndValidate( tls_session_t *p_session )
315 val = gnutls_ContinueHandshake( p_session );
319 tls_session_sys_t *p_sys;
321 p_sys = (tls_session_sys_t *)(p_session->p_sys);
322 /* certificates chain verification */
323 val = gnutls_certificate_verify_peers2( p_sys->session, &status );
327 msg_Err( p_session, "TLS certificate verification failed: %s",
328 gnutls_strerror( val ) );
329 p_session->pf_close( p_session );
335 msg_Warn( p_session, "TLS session: access denied" );
336 if( status & GNUTLS_CERT_INVALID )
337 msg_Dbg( p_session, "certificate could not be verified" );
338 if( status & GNUTLS_CERT_REVOKED )
339 msg_Dbg( p_session, "certificate was revoked" );
340 if( status & GNUTLS_CERT_SIGNER_NOT_FOUND )
341 msg_Dbg( p_session, "certificate's signer was not found" );
342 if( status & GNUTLS_CERT_SIGNER_NOT_CA )
343 msg_Dbg( p_session, "certificate's signer is not a CA" );
344 p_session->pf_close( p_session );
348 msg_Dbg( p_session, "TLS certificate verified" );
349 if( ( p_sys->psz_hostname != NULL )
350 && gnutls_VerifyHostname( (vlc_object_t *)p_session, p_sys->session,
351 p_sys->psz_hostname ) )
353 p_session->pf_close( p_session );
363 gnutls_BeginHandshake( tls_session_t *p_session, int fd,
364 const char *psz_hostname )
366 tls_session_sys_t *p_sys;
368 p_sys = (tls_session_sys_t *)(p_session->p_sys);
370 gnutls_transport_set_ptr (p_sys->session, (gnutls_transport_ptr)(intptr_t)fd);
372 if( psz_hostname != NULL )
374 gnutls_server_name_set( p_sys->session, GNUTLS_NAME_DNS, psz_hostname,
375 strlen( psz_hostname ) );
376 if( get_Bool( p_session, "tls-check-hostname" ) )
378 p_sys->psz_hostname = strdup( psz_hostname );
379 if( p_sys->psz_hostname == NULL )
381 p_session->pf_close( p_session );
387 return p_session->pf_handshake2( p_session );
390 /*****************************************************************************
392 *****************************************************************************
393 * Terminates TLS session and releases session data.
394 *****************************************************************************/
396 gnutls_SessionClose( tls_session_t *p_session )
398 tls_session_sys_t *p_sys;
400 p_sys = (tls_session_sys_t *)(p_session->p_sys);
402 if( p_sys->b_handshaked == VLC_TRUE )
403 gnutls_bye( p_sys->session, GNUTLS_SHUT_WR );
404 gnutls_deinit( p_sys->session );
406 if( p_sys->psz_hostname != NULL )
407 free( p_sys->psz_hostname );
409 vlc_object_detach( p_session );
410 vlc_object_destroy( p_session );
416 gnutls_ClientDelete( tls_session_t *p_session )
418 /* On the client-side, credentials are re-allocated per session */
419 gnutls_certificate_credentials x509_cred =
420 ((tls_client_sys_t *)(p_session->p_sys))->x509_cred;
422 gnutls_SessionClose( p_session );
424 /* credentials must be free'd *after* gnutls_deinit() */
425 gnutls_certificate_free_credentials( x509_cred );
430 gnutls_Addx509File( vlc_object_t *p_this,
431 gnutls_certificate_credentials cred,
432 const char *psz_path, vlc_bool_t b_priv );
435 gnutls_Addx509Directory( vlc_object_t *p_this,
436 gnutls_certificate_credentials cred,
437 const char *psz_dirname,
441 const char *psz_dirent;
443 if( *psz_dirname == '\0' )
446 dir = utf8_opendir( psz_dirname );
449 msg_Warn( p_this, "Cannot open directory (%s): %s", psz_dirname,
456 struct stat st1, st2;
457 int fd = dirfd( dir );
460 * Gets stats for the directory path, checks that it is not a
461 * symbolic link (to avoid possibly infinite recursion), and verifies
462 * that the inode is still the same, to avoid TOCTOU race condition.
465 || fstat( fd, &st1 ) || utf8_lstat( psz_dirname, &st2 )
466 || S_ISLNK( st2.st_mode ) || ( st1.st_ino != st2.st_ino ) )
474 while( ( psz_dirent = utf8_readdir( dir ) ) != NULL )
479 if( ( strcmp( ".", psz_dirent ) == 0 )
480 || ( strcmp( "..", psz_dirent ) == 0 ) )
483 check = asprintf( &psz_filename, "%s/%s", psz_dirname,
485 LocaleFree( psz_dirent );
489 gnutls_Addx509File( p_this, cred, psz_filename, b_priv );
490 free( psz_filename );
499 gnutls_Addx509File( vlc_object_t *p_this,
500 gnutls_certificate_credentials cred,
501 const char *psz_path, vlc_bool_t b_priv )
505 if( utf8_stat( psz_path, &st ) == 0 )
507 if( S_ISREG( st.st_mode ) )
509 char *psz_localname = ToLocale( psz_path );
511 ? gnutls_certificate_set_x509_key_file( cred,
512 psz_localname, psz_localname, GNUTLS_X509_FMT_PEM )
513 : gnutls_certificate_set_x509_trust_file( cred,
514 psz_localname, GNUTLS_X509_FMT_PEM );
515 LocaleFree( psz_localname );
519 msg_Warn( p_this, "Cannot add x509 credentials (%s): %s",
520 psz_path, gnutls_strerror( i ) );
525 msg_Dbg( p_this, "Added x509 credentials (%s)",
530 else if( S_ISDIR( st.st_mode ) )
533 "Looking recursively for x509 credentials in %s",
535 return gnutls_Addx509Directory( p_this, cred, psz_path, b_priv);
542 /*****************************************************************************
544 *****************************************************************************
545 * Initializes client-side TLS session data.
546 *****************************************************************************/
547 static tls_session_t *
548 gnutls_ClientCreate( tls_t *p_tls )
550 tls_session_t *p_session = NULL;
551 tls_client_sys_t *p_sys = NULL;
553 const int cert_type_priority[3] =
559 p_sys = (tls_client_sys_t *)malloc( sizeof(struct tls_client_sys_t) );
563 p_session = (struct tls_session_t *)vlc_object_create ( p_tls, sizeof(struct tls_session_t) );
564 if( p_session == NULL )
570 p_session->p_sys = p_sys;
571 p_session->sock.p_sys = p_session;
572 p_session->sock.pf_send = gnutls_Send;
573 p_session->sock.pf_recv = gnutls_Recv;
574 p_session->pf_handshake = gnutls_BeginHandshake;
575 p_session->pf_close = gnutls_ClientDelete;
577 p_sys->session.b_handshaked = VLC_FALSE;
578 p_sys->session.psz_hostname = NULL;
580 vlc_object_attach( p_session, p_tls );
582 i_val = gnutls_certificate_allocate_credentials( &p_sys->x509_cred );
585 msg_Err( p_tls, "Cannot allocate X509 credentials: %s",
586 gnutls_strerror( i_val ) );
590 if( get_Bool( p_tls, "tls-check-cert" ) )
594 if( asprintf( &psz_path, "%s/"CONFIG_DIR"/ssl/certs",
595 p_tls->p_vlc->psz_homedir ) == -1 )
597 gnutls_certificate_free_credentials( p_sys->x509_cred );
601 gnutls_Addx509Directory( (vlc_object_t *)p_session, p_sys->x509_cred,
602 psz_path, VLC_FALSE );
604 gnutls_Addx509File( (vlc_object_t *)p_session, p_sys->x509_cred,
605 HOST_CA_PATH, VLC_FALSE );
609 p_session->pf_handshake2 = gnutls_HandshakeAndValidate;
612 p_session->pf_handshake2 = gnutls_ContinueHandshake;
617 if( asprintf( &psz_path, "%s/"CONFIG_DIR"/ssl/private",
618 p_tls->p_vlc->psz_homedir ) == -1 )
620 gnutls_certificate_free_credentials( p_sys->x509_cred );
624 gnutls_Addx509Directory( (vlc_object_t *)p_session, p_sys->x509_cred,
625 psz_path, VLC_TRUE );
630 i_val = gnutls_init( &p_sys->session.session, GNUTLS_CLIENT );
633 msg_Err( p_tls, "Cannot initialize TLS session: %s",
634 gnutls_strerror( i_val ) );
635 gnutls_certificate_free_credentials( p_sys->x509_cred );
639 i_val = gnutls_set_default_priority( p_sys->session.session );
642 msg_Err( p_tls, "Cannot set ciphers priorities: %s",
643 gnutls_strerror( i_val ) );
644 gnutls_deinit( p_sys->session.session );
645 gnutls_certificate_free_credentials( p_sys->x509_cred );
649 i_val = gnutls_certificate_type_set_priority( p_sys->session.session,
650 cert_type_priority );
653 msg_Err( p_tls, "Cannot set certificate type priorities: %s",
654 gnutls_strerror( i_val ) );
655 gnutls_deinit( p_sys->session.session );
656 gnutls_certificate_free_credentials( p_sys->x509_cred );
660 i_val = gnutls_credentials_set( p_sys->session.session,
661 GNUTLS_CRD_CERTIFICATE,
665 msg_Err( p_tls, "Cannot set TLS session credentials: %s",
666 gnutls_strerror( i_val ) );
667 gnutls_deinit( p_sys->session.session );
668 gnutls_certificate_free_credentials( p_sys->x509_cred );
675 vlc_object_detach( p_session );
676 vlc_object_destroy( p_session );
683 /*****************************************************************************
684 * TLS session resumption callbacks
685 *****************************************************************************/
686 static int cb_store( void *p_server, gnutls_datum key, gnutls_datum data )
688 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
690 if( ( p_sys->i_cache_size == 0 )
691 || ( key.size > MAX_SESSION_ID )
692 || ( data.size > MAX_SESSION_DATA ) )
695 vlc_mutex_lock( &p_sys->cache_lock );
697 memcpy( p_sys->p_store->id, key.data, key.size);
698 memcpy( p_sys->p_store->data, data.data, data.size );
699 p_sys->p_store->i_idlen = key.size;
700 p_sys->p_store->i_datalen = data.size;
703 if( ( p_sys->p_store - p_sys->p_cache ) == p_sys->i_cache_size )
704 p_sys->p_store = p_sys->p_cache;
706 vlc_mutex_unlock( &p_sys->cache_lock );
712 static const gnutls_datum err_datum = { NULL, 0 };
714 static gnutls_datum cb_fetch( void *p_server, gnutls_datum key )
716 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
717 saved_session_t *p_session, *p_end;
719 p_session = p_sys->p_cache;
720 p_end = p_session + p_sys->i_cache_size;
722 vlc_mutex_lock( &p_sys->cache_lock );
724 while( p_session < p_end )
726 if( ( p_session->i_idlen == key.size )
727 && !memcmp( p_session->id, key.data, key.size ) )
731 data.size = p_session->i_datalen;
733 data.data = gnutls_malloc( data.size );
734 if( data.data == NULL )
736 vlc_mutex_unlock( &p_sys->cache_lock );
740 memcpy( data.data, p_session->data, data.size );
741 vlc_mutex_unlock( &p_sys->cache_lock );
747 vlc_mutex_unlock( &p_sys->cache_lock );
753 static int cb_delete( void *p_server, gnutls_datum key )
755 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
756 saved_session_t *p_session, *p_end;
758 p_session = p_sys->p_cache;
759 p_end = p_session + p_sys->i_cache_size;
761 vlc_mutex_lock( &p_sys->cache_lock );
763 while( p_session < p_end )
765 if( ( p_session->i_idlen == key.size )
766 && !memcmp( p_session->id, key.data, key.size ) )
768 p_session->i_datalen = p_session->i_idlen = 0;
769 vlc_mutex_unlock( &p_sys->cache_lock );
775 vlc_mutex_unlock( &p_sys->cache_lock );
781 /*****************************************************************************
782 * tls_ServerSessionPrepare:
783 *****************************************************************************
784 * Initializes server-side TLS session data.
785 *****************************************************************************/
786 static tls_session_t *
787 gnutls_ServerSessionPrepare( tls_server_t *p_server )
789 tls_session_t *p_session;
790 tls_server_sys_t *p_server_sys;
791 gnutls_session session;
794 p_session = vlc_object_create( p_server, sizeof (struct tls_session_t) );
795 if( p_session == NULL )
798 p_session->p_sys = malloc( sizeof(struct tls_session_sys_t) );
799 if( p_session->p_sys == NULL )
801 vlc_object_destroy( p_session );
805 vlc_object_attach( p_session, p_server );
807 p_server_sys = (tls_server_sys_t *)p_server->p_sys;
808 p_session->sock.p_sys = p_session;
809 p_session->sock.pf_send = gnutls_Send;
810 p_session->sock.pf_recv = gnutls_Recv;
811 p_session->pf_handshake = gnutls_BeginHandshake;
812 p_session->pf_handshake2 = p_server_sys->pf_handshake2;
813 p_session->pf_close = gnutls_SessionClose;
815 ((tls_session_sys_t *)p_session->p_sys)->b_handshaked = VLC_FALSE;
816 ((tls_session_sys_t *)p_session->p_sys)->psz_hostname = NULL;
818 i_val = gnutls_init( &session, GNUTLS_SERVER );
821 msg_Err( p_server, "Cannot initialize TLS session: %s",
822 gnutls_strerror( i_val ) );
826 ((tls_session_sys_t *)p_session->p_sys)->session = session;
828 i_val = gnutls_set_default_priority( session );
831 msg_Err( p_server, "Cannot set ciphers priorities: %s",
832 gnutls_strerror( i_val ) );
833 gnutls_deinit( session );
837 i_val = gnutls_credentials_set( session, GNUTLS_CRD_CERTIFICATE,
838 p_server_sys->x509_cred );
841 msg_Err( p_server, "Cannot set TLS session credentials: %s",
842 gnutls_strerror( i_val ) );
843 gnutls_deinit( session );
847 if( p_session->pf_handshake2 == gnutls_HandshakeAndValidate )
848 gnutls_certificate_server_set_request( session, GNUTLS_CERT_REQUIRE );
850 gnutls_dh_set_prime_bits( session, get_Int( p_server, "gnutls-dh-bits" ) );
852 /* Session resumption support */
853 gnutls_db_set_cache_expiration( session, get_Int( p_server,
854 "gnutls-cache-expiration" ) );
855 gnutls_db_set_retrieve_function( session, cb_fetch );
856 gnutls_db_set_remove_function( session, cb_delete );
857 gnutls_db_set_store_function( session, cb_store );
858 gnutls_db_set_ptr( session, p_server );
863 free( p_session->p_sys );
864 vlc_object_detach( p_session );
865 vlc_object_destroy( p_session );
870 /*****************************************************************************
872 *****************************************************************************
873 * Releases data allocated with tls_ServerCreate.
874 *****************************************************************************/
876 gnutls_ServerDelete( tls_server_t *p_server )
878 tls_server_sys_t *p_sys;
879 p_sys = (tls_server_sys_t *)p_server->p_sys;
881 vlc_mutex_destroy( &p_sys->cache_lock );
882 free( p_sys->p_cache );
884 vlc_object_detach( p_server );
885 vlc_object_destroy( p_server );
887 /* all sessions depending on the server are now deinitialized */
888 gnutls_certificate_free_credentials( p_sys->x509_cred );
889 gnutls_dh_params_deinit( p_sys->dh_params );
894 /*****************************************************************************
896 *****************************************************************************
897 * Adds one or more certificate authorities.
898 * Returns -1 on error, 0 on success.
899 *****************************************************************************/
901 gnutls_ServerAddCA( tls_server_t *p_server, const char *psz_ca_path )
903 tls_server_sys_t *p_sys;
904 char *psz_local_path;
907 p_sys = (tls_server_sys_t *)(p_server->p_sys);
909 psz_local_path = ToLocale( psz_ca_path );
910 val = gnutls_certificate_set_x509_trust_file( p_sys->x509_cred,
912 GNUTLS_X509_FMT_PEM );
913 LocaleFree( psz_local_path );
916 msg_Err( p_server, "Cannot add trusted CA (%s): %s", psz_ca_path,
917 gnutls_strerror( val ) );
920 msg_Dbg( p_server, " %d trusted CA added (%s)", val, psz_ca_path );
922 /* enables peer's certificate verification */
923 p_sys->pf_handshake2 = gnutls_HandshakeAndValidate;
929 /*****************************************************************************
931 *****************************************************************************
932 * Adds a certificates revocation list to be sent to TLS clients.
933 * Returns -1 on error, 0 on success.
934 *****************************************************************************/
936 gnutls_ServerAddCRL( tls_server_t *p_server, const char *psz_crl_path )
939 char *psz_local_path = ToLocale( psz_crl_path );
941 val = gnutls_certificate_set_x509_crl_file( ((tls_server_sys_t *)
942 (p_server->p_sys))->x509_cred,
944 GNUTLS_X509_FMT_PEM );
945 LocaleFree( psz_crl_path );
948 msg_Err( p_server, "Cannot add CRL (%s): %s", psz_crl_path,
949 gnutls_strerror( val ) );
952 msg_Dbg( p_server, "%d CRL added (%s)", val, psz_crl_path );
957 /*****************************************************************************
959 *****************************************************************************
960 * Allocates a whole server's TLS credentials.
961 * Returns NULL on error.
962 *****************************************************************************/
963 static tls_server_t *
964 gnutls_ServerCreate( tls_t *p_tls, const char *psz_cert_path,
965 const char *psz_key_path )
967 tls_server_t *p_server;
968 tls_server_sys_t *p_sys;
969 char *psz_local_key, *psz_local_cert;
972 msg_Dbg( p_tls, "Creating TLS server" );
974 p_sys = (tls_server_sys_t *)malloc( sizeof(struct tls_server_sys_t) );
978 p_sys->i_cache_size = get_Int( p_tls, "gnutls-cache-size" );
979 p_sys->p_cache = (struct saved_session_t *)calloc( p_sys->i_cache_size,
980 sizeof( struct saved_session_t ) );
981 if( p_sys->p_cache == NULL )
986 p_sys->p_store = p_sys->p_cache;
988 p_server = vlc_object_create( p_tls, sizeof(struct tls_server_t) );
989 if( p_server == NULL )
991 free( p_sys->p_cache );
996 vlc_object_attach( p_server, p_tls );
998 p_server->p_sys = p_sys;
999 p_server->pf_delete = gnutls_ServerDelete;
1000 p_server->pf_add_CA = gnutls_ServerAddCA;
1001 p_server->pf_add_CRL = gnutls_ServerAddCRL;
1002 p_server->pf_session_prepare = gnutls_ServerSessionPrepare;
1004 /* No certificate validation by default */
1005 p_sys->pf_handshake2 = gnutls_ContinueHandshake;
1007 /* FIXME: check for errors */
1008 vlc_mutex_init( p_server, &p_sys->cache_lock );
1010 /* Sets server's credentials */
1011 val = gnutls_certificate_allocate_credentials( &p_sys->x509_cred );
1014 msg_Err( p_server, "Cannot allocate X509 credentials: %s",
1015 gnutls_strerror( val ) );
1019 psz_local_cert = ToLocale( psz_cert_path );
1020 psz_local_key = ToLocale( psz_key_path );
1021 val = gnutls_certificate_set_x509_key_file( p_sys->x509_cred,
1022 psz_local_cert, psz_local_key,
1023 GNUTLS_X509_FMT_PEM );
1024 LocaleFree( psz_cert_path );
1025 LocaleFree( psz_key_path );
1028 msg_Err( p_server, "Cannot set certificate chain or private key: %s",
1029 gnutls_strerror( val ) );
1030 gnutls_certificate_free_credentials( p_sys->x509_cred );
1035 * - regenerate these regularly
1036 * - support other ciper suites
1038 val = gnutls_dh_params_init( &p_sys->dh_params );
1041 msg_Dbg( p_server, "Computing Diffie Hellman ciphers parameters" );
1042 val = gnutls_dh_params_generate2( p_sys->dh_params,
1043 get_Int( p_tls, "gnutls-dh-bits" ) );
1047 msg_Err( p_server, "Cannot initialize DH cipher suites: %s",
1048 gnutls_strerror( val ) );
1049 gnutls_certificate_free_credentials( p_sys->x509_cred );
1052 msg_Dbg( p_server, "Ciphers parameters computed" );
1054 gnutls_certificate_set_dh_params( p_sys->x509_cred, p_sys->dh_params);
1059 vlc_mutex_destroy( &p_sys->cache_lock );
1060 vlc_object_detach( p_server );
1061 vlc_object_destroy( p_server );
1067 /*****************************************************************************
1068 * gcrypt thread option VLC implementation:
1069 *****************************************************************************/
1070 vlc_object_t *__p_gcry_data;
1072 static int gcry_vlc_mutex_init( void **p_sys )
1075 vlc_mutex_t *p_lock = (vlc_mutex_t *)malloc( sizeof( vlc_mutex_t ) );
1080 i_val = vlc_mutex_init( __p_gcry_data, p_lock );
1088 static int gcry_vlc_mutex_destroy( void **p_sys )
1091 vlc_mutex_t *p_lock = (vlc_mutex_t *)*p_sys;
1093 i_val = vlc_mutex_destroy( p_lock );
1098 static int gcry_vlc_mutex_lock( void **p_sys )
1100 return vlc_mutex_lock( (vlc_mutex_t *)*p_sys );
1103 static int gcry_vlc_mutex_unlock( void **lock )
1105 return vlc_mutex_unlock( (vlc_mutex_t *)*lock );
1108 static struct gcry_thread_cbs gcry_threads_vlc =
1110 GCRY_THREAD_OPTION_USER,
1112 gcry_vlc_mutex_init,
1113 gcry_vlc_mutex_destroy,
1114 gcry_vlc_mutex_lock,
1115 gcry_vlc_mutex_unlock
1119 /*****************************************************************************
1120 * Module initialization
1121 *****************************************************************************/
1123 Open( vlc_object_t *p_this )
1125 tls_t *p_tls = (tls_t *)p_this;
1127 vlc_value_t lock, count;
1129 var_Create( p_this->p_libvlc, "gnutls_mutex", VLC_VAR_MUTEX );
1130 var_Get( p_this->p_libvlc, "gnutls_mutex", &lock );
1131 vlc_mutex_lock( lock.p_address );
1133 /* Initialize GnuTLS only once */
1134 var_Create( p_this->p_libvlc, "gnutls_count", VLC_VAR_INTEGER );
1135 var_Get( p_this->p_libvlc, "gnutls_count", &count);
1137 if( count.i_int == 0)
1139 const char *psz_version;
1141 __p_gcry_data = VLC_OBJECT( p_this->p_vlc );
1143 gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_vlc);
1144 if( gnutls_global_init( ) )
1146 msg_Warn( p_this, "cannot initialize GnuTLS" );
1147 vlc_mutex_unlock( lock.p_address );
1148 return VLC_EGENERIC;
1151 * FIXME: in fact, we currently depends on 1.0.17, but it breaks on
1152 * Debian which as a patched 1.0.16 (which we can use).
1154 psz_version = gnutls_check_version( "1.0.16" );
1155 if( psz_version == NULL )
1157 gnutls_global_deinit( );
1158 vlc_mutex_unlock( lock.p_address );
1159 msg_Err( p_this, "unsupported GnuTLS version" );
1160 return VLC_EGENERIC;
1162 msg_Dbg( p_this, "GnuTLS v%s initialized", psz_version );
1166 var_Set( p_this->p_libvlc, "gnutls_count", count);
1167 vlc_mutex_unlock( lock.p_address );
1169 p_tls->pf_server_create = gnutls_ServerCreate;
1170 p_tls->pf_client_create = gnutls_ClientCreate;
1175 /*****************************************************************************
1176 * Module deinitialization
1177 *****************************************************************************/
1179 Close( vlc_object_t *p_this )
1181 /*tls_t *p_tls = (tls_t *)p_this;
1182 tls_sys_t *p_sys = (tls_sys_t *)(p_this->p_sys);*/
1184 vlc_value_t lock, count;
1186 var_Create( p_this->p_libvlc, "gnutls_mutex", VLC_VAR_MUTEX );
1187 var_Get( p_this->p_libvlc, "gnutls_mutex", &lock );
1188 vlc_mutex_lock( lock.p_address );
1190 var_Create( p_this->p_libvlc, "gnutls_count", VLC_VAR_INTEGER );
1191 var_Get( p_this->p_libvlc, "gnutls_count", &count);
1193 var_Set( p_this->p_libvlc, "gnutls_count", count);
1195 if( count.i_int == 0 )
1197 gnutls_global_deinit( );
1198 msg_Dbg( p_this, "GnuTLS deinitialized" );
1201 vlc_mutex_unlock( lock.p_address );