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 *****************************************************************************/
32 #include <sys/types.h>
37 #ifdef HAVE_SYS_STAT_H
38 # include <sys/stat.h>
46 #include <vlc_charset.h>
49 #include <gnutls/gnutls.h>
50 #include <gnutls/x509.h>
52 #define CACHE_TIMEOUT 3600
57 /*****************************************************************************
59 *****************************************************************************/
60 static int OpenClient (vlc_object_t *);
61 static void CloseClient (vlc_object_t *);
62 static int OpenServer (vlc_object_t *);
63 static void CloseServer (vlc_object_t *);
65 #define CACHE_TIMEOUT_TEXT N_("Expiration time for resumed TLS sessions")
66 #define CACHE_TIMEOUT_LONGTEXT N_( \
67 "It is possible to cache the resumed TLS sessions. This is the expiration "\
68 "time of the sessions stored in this cache, in seconds." )
70 #define CACHE_SIZE_TEXT N_("Number of resumed TLS sessions")
71 #define CACHE_SIZE_LONGTEXT N_( \
72 "This is the maximum number of resumed TLS sessions that " \
73 "the cache will hold." )
76 set_shortname( "GnuTLS" );
77 set_description( _("GnuTLS transport layer security") );
78 set_capability( "tls client", 1 );
79 set_callbacks( OpenClient, CloseClient );
80 set_category( CAT_ADVANCED );
81 set_subcategory( SUBCAT_ADVANCED_MISC );
83 add_obsolete_bool( "tls-check-cert" );
84 add_obsolete_bool( "tls-check-hostname" );
87 set_description( _("GnuTLS server") );
88 set_capability( "tls server", 1 );
89 set_category( CAT_ADVANCED );
90 set_subcategory( SUBCAT_ADVANCED_MISC );
91 set_callbacks( OpenServer, CloseServer );
93 add_obsolete_integer( "gnutls-dh-bits" );
94 add_integer( "gnutls-cache-timeout", CACHE_TIMEOUT, NULL,
95 CACHE_TIMEOUT_TEXT, CACHE_TIMEOUT_LONGTEXT, VLC_TRUE );
96 add_integer( "gnutls-cache-size", CACHE_SIZE, NULL, CACHE_SIZE_TEXT,
97 CACHE_SIZE_LONGTEXT, VLC_TRUE );
102 #ifdef LIBVLC_USE_PTHREAD
103 GCRY_THREAD_OPTION_PTHREAD_IMPL;
104 # define gcry_threads_vlc gcry_threads_pthread
107 * gcrypt thread option VLC implementation
110 # define NEED_THREAD_CONTEXT 1
111 static vlc_object_t *__p_gcry_data = NULL;
113 static int gcry_vlc_mutex_init( void **p_sys )
116 vlc_mutex_t *p_lock = (vlc_mutex_t *)malloc( sizeof( vlc_mutex_t ) );
121 i_val = vlc_mutex_init( __p_gcry_data, p_lock );
129 static int gcry_vlc_mutex_destroy( void **p_sys )
132 vlc_mutex_t *p_lock = (vlc_mutex_t *)*p_sys;
134 i_val = vlc_mutex_destroy( p_lock );
139 static int gcry_vlc_mutex_lock( void **p_sys )
141 return vlc_mutex_lock( (vlc_mutex_t *)*p_sys );
144 static int gcry_vlc_mutex_unlock( void **lock )
146 return vlc_mutex_unlock( (vlc_mutex_t *)*lock );
149 static struct gcry_thread_cbs gcry_threads_vlc =
151 GCRY_THREAD_OPTION_USER,
154 gcry_vlc_mutex_destroy,
156 gcry_vlc_mutex_unlock
162 * Initializes GnuTLS with proper locking.
163 * @return VLC_SUCCESS on success, a VLC error code otherwise.
165 static int gnutls_Init (vlc_object_t *p_this)
167 int ret = VLC_EGENERIC;
169 vlc_mutex_t *lock = var_AcquireMutex ("gnutls_mutex");
171 /* This should probably be removed/fixed. It will screw up with multiple
172 * LibVLC instances. */
173 #ifdef NEED_THREAD_CONTEXT
174 __p_gcry_data = VLC_OBJECT (p_this->p_libvlc);
177 gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_vlc);
178 if (gnutls_global_init ())
180 msg_Err (p_this, "cannot initialize GnuTLS");
184 const char *psz_version = gnutls_check_version ("1.3.3");
185 if (psz_version == NULL)
187 msg_Err (p_this, "unsupported GnuTLS version");
188 gnutls_global_deinit ();
192 msg_Dbg (p_this, "GnuTLS v%s initialized", psz_version);
196 vlc_mutex_unlock (lock);
202 * Deinitializes GnuTLS.
204 static void gnutls_Deinit (vlc_object_t *p_this)
206 vlc_mutex_t *lock = var_AcquireMutex( "gnutls_mutex" );
208 gnutls_global_deinit ();
209 msg_Dbg (p_this, "GnuTLS deinitialized");
210 vlc_mutex_unlock (lock);
214 static int gnutls_Error (vlc_object_t *obj, int val)
223 /* WinSock does not return EAGAIN, return EINTR instead */
225 case GNUTLS_E_INTERRUPTED:
227 WSASetLastError (WSAEINTR);
234 msg_Err (obj, "%s", gnutls_strerror (val));
236 if (!gnutls_error_is_fatal (val))
237 msg_Err (obj, "Error above should be handled");
240 WSASetLastError (WSAECONNRESET);
249 struct tls_session_sys_t
251 gnutls_session_t session;
253 vlc_bool_t b_handshaked;
258 * Sends data through a TLS session.
261 gnutls_Send( void *p_session, const void *buf, int i_length )
264 tls_session_sys_t *p_sys;
266 p_sys = (tls_session_sys_t *)(((tls_session_t *)p_session)->p_sys);
268 val = gnutls_record_send( p_sys->session, buf, i_length );
269 return (val < 0) ? gnutls_Error ((vlc_object_t *)p_session, val) : val;
274 * Receives data through a TLS session.
277 gnutls_Recv( void *p_session, void *buf, int i_length )
280 tls_session_sys_t *p_sys;
282 p_sys = (tls_session_sys_t *)(((tls_session_t *)p_session)->p_sys);
284 val = gnutls_record_recv( p_sys->session, buf, i_length );
285 return (val < 0) ? gnutls_Error ((vlc_object_t *)p_session, val) : val;
290 * Starts or continues the TLS handshake.
292 * @return -1 on fatal error, 0 on succesful handshake completion,
293 * 1 if more would-be blocking recv is needed,
294 * 2 if more would-be blocking send is required.
297 gnutls_ContinueHandshake (tls_session_t *p_session)
299 tls_session_sys_t *p_sys = p_session->p_sys;
303 WSASetLastError( 0 );
305 val = gnutls_handshake( p_sys->session );
306 if( ( val == GNUTLS_E_AGAIN ) || ( val == GNUTLS_E_INTERRUPTED ) )
307 return 1 + gnutls_record_get_direction( p_sys->session );
312 msg_Dbg( p_session, "Winsock error %d", WSAGetLastError( ) );
314 msg_Err( p_session, "TLS handshake error: %s",
315 gnutls_strerror( val ) );
319 p_sys->b_handshaked = VLC_TRUE;
330 static const error_msg_t cert_errors[] =
332 { GNUTLS_CERT_INVALID,
333 "Certificate could not be verified" },
334 { GNUTLS_CERT_REVOKED,
335 "Certificate was revoked" },
336 { GNUTLS_CERT_SIGNER_NOT_FOUND,
337 "Certificate's signer was not found" },
338 { GNUTLS_CERT_SIGNER_NOT_CA,
339 "Certificate's signer is not a CA" },
340 { GNUTLS_CERT_INSECURE_ALGORITHM,
341 "Insecure certificate signature algorithm" },
347 gnutls_HandshakeAndValidate( tls_session_t *session )
349 int val = gnutls_ContinueHandshake( session );
353 tls_session_sys_t *p_sys = (tls_session_sys_t *)(session->p_sys);
355 /* certificates chain verification */
357 val = gnutls_certificate_verify_peers2( p_sys->session, &status );
361 msg_Err( session, "Certificate verification failed: %s",
362 gnutls_strerror( val ) );
368 msg_Err( session, "TLS session: access denied" );
369 for( const error_msg_t *e = cert_errors; e->flag; e++ )
371 if( status & e->flag )
373 msg_Err( session, "%s", e->msg );
380 "unknown certificate error (you found a bug in VLC)" );
385 /* certificate (host)name verification */
386 const gnutls_datum_t *data;
387 data = gnutls_certificate_get_peers (p_sys->session, &(unsigned){0});
390 msg_Err( session, "Peer certificate not available" );
394 gnutls_x509_crt_t cert;
395 val = gnutls_x509_crt_init( &cert );
398 msg_Err( session, "x509 fatal error: %s", gnutls_strerror( val ) );
402 val = gnutls_x509_crt_import( cert, data, GNUTLS_X509_FMT_DER );
405 msg_Err( session, "Certificate import error: %s",
406 gnutls_strerror( val ) );
410 assert( p_sys->psz_hostname != NULL );
411 if ( !gnutls_x509_crt_check_hostname( cert, p_sys->psz_hostname ) )
413 msg_Err( session, "Certificate does not match \"%s\"",
414 p_sys->psz_hostname );
418 if( gnutls_x509_crt_get_expiration_time( cert ) < time( NULL ) )
420 msg_Err( session, "Certificate expired" );
424 if( gnutls_x509_crt_get_activation_time( cert ) > time ( NULL ) )
426 msg_Err( session, "Certificate not yet valid" );
430 gnutls_x509_crt_deinit( cert );
431 msg_Dbg( session, "TLS/x509 certificate verified" );
435 gnutls_x509_crt_deinit( cert );
440 * Sets the operating system file descriptor backend for the TLS sesison.
442 * @param fd stream socket already connected with the peer.
445 gnutls_SetFD (tls_session_t *p_session, int fd)
447 gnutls_transport_set_ptr (p_session->p_sys->session,
448 (gnutls_transport_ptr_t)(intptr_t)fd);
451 typedef int (*tls_prio_func) (gnutls_session_t, const int *);
454 gnutls_SetPriority (vlc_object_t *restrict obj, const char *restrict name,
455 tls_prio_func func, gnutls_session_t session,
456 const int *restrict values)
458 int val = func (session, values);
461 msg_Err (obj, "cannot set %s priorities: %s", name,
462 gnutls_strerror (val));
470 gnutls_SessionPrioritize (vlc_object_t *obj, gnutls_session_t session)
472 /* Note that ordering matters (on the client side) */
473 static const int protos[] =
480 static const int comps[] =
486 static const int macs[] =
489 GNUTLS_MAC_RMD160, // RIPEMD
495 static const int ciphers[] =
497 GNUTLS_CIPHER_AES_256_CBC,
498 GNUTLS_CIPHER_AES_128_CBC,
499 GNUTLS_CIPHER_3DES_CBC,
500 GNUTLS_CIPHER_ARCFOUR_128,
501 //GNUTLS_CIPHER_DES_CBC,
502 //GNUTLS_CIPHER_ARCFOUR_40,
503 //GNUTLS_CIPHER_RC2_40_CBC,
504 //GNUTLS_CIPHER_NULL,
507 static const int kx[] =
512 //GNUTLS_KX_RSA_EXPORT,
513 //GNUTLS_KX_DHE_PSK, TODO
514 //GNUTLS_KX_PSK, TODO
515 //GNUTLS_KX_SRP_RSA, TODO
516 //GNUTLS_KX_SRP_DSS, TODO
517 //GNUTLS_KX_SRP, TODO
521 static const int cert_types[] =
524 //GNUTLS_CRT_OPENPGP, TODO
528 int val = gnutls_set_default_priority (session);
531 msg_Err (obj, "cannot set default TLS priorities: %s",
532 gnutls_strerror (val));
536 if (gnutls_SetPriority (obj, "protocols",
537 gnutls_protocol_set_priority, session, protos)
538 || gnutls_SetPriority (obj, "compression algorithms",
539 gnutls_compression_set_priority, session, comps)
540 || gnutls_SetPriority (obj, "MAC algorithms",
541 gnutls_mac_set_priority, session, macs)
542 || gnutls_SetPriority (obj, "ciphers",
543 gnutls_cipher_set_priority, session, ciphers)
544 || gnutls_SetPriority (obj, "key exchange algorithms",
545 gnutls_kx_set_priority, session, kx)
546 || gnutls_SetPriority (obj, "certificate types",
547 gnutls_certificate_type_set_priority, session,
556 gnutls_Addx509File( vlc_object_t *p_this,
557 gnutls_certificate_credentials_t cred,
558 const char *psz_path, vlc_bool_t b_priv );
561 gnutls_Addx509Directory( vlc_object_t *p_this,
562 gnutls_certificate_credentials_t cred,
563 const char *psz_dirname,
568 if( *psz_dirname == '\0' )
571 dir = utf8_opendir( psz_dirname );
576 msg_Err (p_this, "cannot open directory (%s): %m", psz_dirname);
580 msg_Dbg (p_this, "creating empty certificate directory: %s",
582 utf8_mkdir (psz_dirname, b_priv ? 0700 : 0755);
588 struct stat st1, st2;
589 int fd = dirfd( dir );
592 * Gets stats for the directory path, checks that it is not a
593 * symbolic link (to avoid possibly infinite recursion), and verifies
594 * that the inode is still the same, to avoid TOCTOU race condition.
597 || fstat( fd, &st1 ) || utf8_lstat( psz_dirname, &st2 )
598 || S_ISLNK( st2.st_mode ) || ( st1.st_ino != st2.st_ino ) )
608 char *ent = utf8_readdir (dir);
612 if ((strcmp (ent, ".") == 0) || (strcmp (ent, "..") == 0))
615 char path[strlen (psz_dirname) + strlen (ent) + 2];
616 sprintf (path, "%s"DIR_SEP"%s", psz_dirname, ent);
619 gnutls_Addx509File( p_this, cred, path, b_priv );
628 gnutls_Addx509File( vlc_object_t *p_this,
629 gnutls_certificate_credentials cred,
630 const char *psz_path, vlc_bool_t b_priv )
634 if( utf8_stat( psz_path, &st ) == 0 )
636 if( S_ISREG( st.st_mode ) )
638 char *psz_localname = ToLocale( psz_path );
640 ? gnutls_certificate_set_x509_key_file( cred,
641 psz_localname, psz_localname, GNUTLS_X509_FMT_PEM )
642 : gnutls_certificate_set_x509_trust_file( cred,
643 psz_localname, GNUTLS_X509_FMT_PEM );
644 LocaleFree( psz_localname );
648 msg_Warn( p_this, "cannot add x509 credentials (%s): %s",
649 psz_path, gnutls_strerror( i ) );
654 msg_Dbg( p_this, "added x509 credentials (%s)",
659 else if( S_ISDIR( st.st_mode ) )
662 "looking recursively for x509 credentials in %s",
664 return gnutls_Addx509Directory( p_this, cred, psz_path, b_priv);
668 msg_Warn( p_this, "cannot add x509 credentials (%s): %m", psz_path );
673 /** TLS client session data */
674 typedef struct tls_client_sys_t
676 struct tls_session_sys_t session;
677 gnutls_certificate_credentials_t x509_cred;
682 * Initializes a client-side TLS session.
684 static int OpenClient (vlc_object_t *obj)
686 tls_session_t *p_session = (tls_session_t *)obj;
689 if (gnutls_Init (obj))
692 tls_client_sys_t *p_sys = malloc (sizeof (*p_sys));
699 p_session->p_sys = &p_sys->session;
700 p_session->sock.p_sys = p_session;
701 p_session->sock.pf_send = gnutls_Send;
702 p_session->sock.pf_recv = gnutls_Recv;
703 p_session->pf_set_fd = gnutls_SetFD;
705 p_sys->session.b_handshaked = VLC_FALSE;
707 const char *homedir = obj->p_libvlc->psz_datadir,
708 *datadir = config_GetDataDir ();
709 size_t l1 = strlen (homedir), l2 = strlen (datadir);
710 char path[((l1 > l2) ? l1 : l2) + sizeof ("/ca-certificates.crt")];
711 // > sizeof ("/ssl/private")
712 // > sizeof ("/ssl/certs")
714 i_val = gnutls_certificate_allocate_credentials (&p_sys->x509_cred);
717 msg_Err (obj, "cannot allocate X509 credentials: %s",
718 gnutls_strerror (i_val));
722 sprintf (path, "%s/ssl", homedir);
723 utf8_mkdir (path, 0755);
725 sprintf (path, "%s/ssl/certs", homedir);
726 gnutls_Addx509Directory (VLC_OBJECT (p_session),
727 p_sys->x509_cred, path, VLC_FALSE);
729 sprintf (path, "%s/ca-certificates.crt", datadir);
730 gnutls_Addx509File (VLC_OBJECT (p_session),
731 p_sys->x509_cred, path, VLC_FALSE);
732 p_session->pf_handshake = gnutls_HandshakeAndValidate;
733 /*p_session->pf_handshake = gnutls_ContinueHandshake;*/
735 sprintf (path, "%s/ssl/private", homedir);
736 gnutls_Addx509Directory (VLC_OBJECT (p_session), p_sys->x509_cred,
739 i_val = gnutls_init (&p_sys->session.session, GNUTLS_CLIENT);
742 msg_Err (obj, "cannot initialize TLS session: %s",
743 gnutls_strerror (i_val));
744 gnutls_certificate_free_credentials (p_sys->x509_cred);
748 if (gnutls_SessionPrioritize (VLC_OBJECT (p_session),
749 p_sys->session.session))
752 /* minimum DH prime bits */
753 gnutls_dh_set_prime_bits (p_sys->session.session, 1024);
755 i_val = gnutls_credentials_set (p_sys->session.session,
756 GNUTLS_CRD_CERTIFICATE,
760 msg_Err (obj, "cannot set TLS session credentials: %s",
761 gnutls_strerror (i_val));
765 char *servername = var_GetNonEmptyString (p_session, "tls-server-name");
766 if (servername == NULL )
767 msg_Err (p_session, "server name missing for TLS session");
769 p_sys->session.psz_hostname = servername;
770 gnutls_server_name_set (p_sys->session.session, GNUTLS_NAME_DNS,
771 servername, strlen (servername));
776 gnutls_deinit (p_sys->session.session);
777 gnutls_certificate_free_credentials (p_sys->x509_cred);
785 static void CloseClient (vlc_object_t *obj)
787 tls_session_t *client = (tls_session_t *)obj;
788 tls_client_sys_t *p_sys = (tls_client_sys_t *)(client->p_sys);
790 if (p_sys->session.b_handshaked == VLC_TRUE)
791 gnutls_bye (p_sys->session.session, GNUTLS_SHUT_WR);
792 gnutls_deinit (p_sys->session.session);
793 /* credentials must be free'd *after* gnutls_deinit() */
794 gnutls_certificate_free_credentials (p_sys->x509_cred);
797 free (p_sys->session.psz_hostname);
805 struct tls_server_sys_t
807 gnutls_certificate_credentials_t x509_cred;
808 gnutls_dh_params_t dh_params;
810 struct saved_session_t *p_cache;
811 struct saved_session_t *p_store;
813 vlc_mutex_t cache_lock;
815 int (*pf_handshake) (tls_session_t *);
820 * TLS session resumption callbacks (server-side)
822 #define MAX_SESSION_ID 32
823 #define MAX_SESSION_DATA 1024
825 typedef struct saved_session_t
827 char id[MAX_SESSION_ID];
828 char data[MAX_SESSION_DATA];
835 static int cb_store( void *p_server, gnutls_datum key, gnutls_datum data )
837 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
839 if( ( p_sys->i_cache_size == 0 )
840 || ( key.size > MAX_SESSION_ID )
841 || ( data.size > MAX_SESSION_DATA ) )
844 vlc_mutex_lock( &p_sys->cache_lock );
846 memcpy( p_sys->p_store->id, key.data, key.size);
847 memcpy( p_sys->p_store->data, data.data, data.size );
848 p_sys->p_store->i_idlen = key.size;
849 p_sys->p_store->i_datalen = data.size;
852 if( ( p_sys->p_store - p_sys->p_cache ) == p_sys->i_cache_size )
853 p_sys->p_store = p_sys->p_cache;
855 vlc_mutex_unlock( &p_sys->cache_lock );
861 static gnutls_datum cb_fetch( void *p_server, gnutls_datum key )
863 static const gnutls_datum_t err_datum = { NULL, 0 };
864 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
865 saved_session_t *p_session, *p_end;
867 p_session = p_sys->p_cache;
868 p_end = p_session + p_sys->i_cache_size;
870 vlc_mutex_lock( &p_sys->cache_lock );
872 while( p_session < p_end )
874 if( ( p_session->i_idlen == key.size )
875 && !memcmp( p_session->id, key.data, key.size ) )
879 data.size = p_session->i_datalen;
881 data.data = gnutls_malloc( data.size );
882 if( data.data == NULL )
884 vlc_mutex_unlock( &p_sys->cache_lock );
888 memcpy( data.data, p_session->data, data.size );
889 vlc_mutex_unlock( &p_sys->cache_lock );
895 vlc_mutex_unlock( &p_sys->cache_lock );
901 static int cb_delete( void *p_server, gnutls_datum key )
903 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
904 saved_session_t *p_session, *p_end;
906 p_session = p_sys->p_cache;
907 p_end = p_session + p_sys->i_cache_size;
909 vlc_mutex_lock( &p_sys->cache_lock );
911 while( p_session < p_end )
913 if( ( p_session->i_idlen == key.size )
914 && !memcmp( p_session->id, key.data, key.size ) )
916 p_session->i_datalen = p_session->i_idlen = 0;
917 vlc_mutex_unlock( &p_sys->cache_lock );
923 vlc_mutex_unlock( &p_sys->cache_lock );
930 * Terminates TLS session and releases session data.
931 * You still have to close the socket yourself.
934 gnutls_SessionClose (tls_server_t *p_server, tls_session_t *p_session)
936 tls_session_sys_t *p_sys = p_session->p_sys;
939 if( p_sys->b_handshaked == VLC_TRUE )
940 gnutls_bye( p_sys->session, GNUTLS_SHUT_WR );
941 gnutls_deinit( p_sys->session );
943 vlc_object_detach( p_session );
944 vlc_object_destroy( p_session );
951 * Initializes a server-side TLS session.
953 static tls_session_t *
954 gnutls_ServerSessionPrepare( tls_server_t *p_server )
956 tls_session_t *p_session;
957 tls_server_sys_t *p_server_sys;
958 gnutls_session_t session;
961 p_session = vlc_object_create( p_server, sizeof (struct tls_session_t) );
962 if( p_session == NULL )
965 p_session->p_sys = malloc( sizeof(struct tls_session_sys_t) );
966 if( p_session->p_sys == NULL )
968 vlc_object_destroy( p_session );
972 p_server_sys = p_server->p_sys;
973 p_session->sock.p_sys = p_session;
974 p_session->sock.pf_send = gnutls_Send;
975 p_session->sock.pf_recv = gnutls_Recv;
976 p_session->pf_set_fd = gnutls_SetFD;
977 p_session->pf_handshake = p_server_sys->pf_handshake;
979 p_session->p_sys->b_handshaked = VLC_FALSE;
980 p_session->p_sys->psz_hostname = NULL;
982 i_val = gnutls_init( &session, GNUTLS_SERVER );
985 msg_Err( p_server, "cannot initialize TLS session: %s",
986 gnutls_strerror( i_val ) );
990 p_session->p_sys->session = session;
992 if (gnutls_SessionPrioritize (VLC_OBJECT (p_session), session))
994 gnutls_deinit( session );
998 i_val = gnutls_credentials_set( session, GNUTLS_CRD_CERTIFICATE,
999 p_server_sys->x509_cred );
1002 msg_Err( p_server, "cannot set TLS session credentials: %s",
1003 gnutls_strerror( i_val ) );
1004 gnutls_deinit( session );
1008 if (p_session->pf_handshake == gnutls_HandshakeAndValidate)
1009 gnutls_certificate_server_set_request (session, GNUTLS_CERT_REQUIRE);
1011 /* Session resumption support */
1012 i_val = config_GetInt (p_server, "gnutls-cache-timeout");
1013 gnutls_db_set_cache_expiration (session, i_val);
1014 gnutls_db_set_retrieve_function( session, cb_fetch );
1015 gnutls_db_set_remove_function( session, cb_delete );
1016 gnutls_db_set_store_function( session, cb_store );
1017 gnutls_db_set_ptr( session, p_server );
1022 free( p_session->p_sys );
1023 vlc_object_detach( p_session );
1024 vlc_object_destroy( p_session );
1030 * Adds one or more certificate authorities.
1032 * @param psz_ca_path (Unicode) path to an x509 certificates list.
1034 * @return -1 on error, 0 on success.
1037 gnutls_ServerAddCA( tls_server_t *p_server, const char *psz_ca_path )
1039 tls_server_sys_t *p_sys;
1040 char *psz_local_path;
1043 p_sys = (tls_server_sys_t *)(p_server->p_sys);
1045 psz_local_path = ToLocale( psz_ca_path );
1046 val = gnutls_certificate_set_x509_trust_file( p_sys->x509_cred,
1048 GNUTLS_X509_FMT_PEM );
1049 LocaleFree( psz_local_path );
1052 msg_Err( p_server, "cannot add trusted CA (%s): %s", psz_ca_path,
1053 gnutls_strerror( val ) );
1054 return VLC_EGENERIC;
1056 msg_Dbg( p_server, " %d trusted CA added (%s)", val, psz_ca_path );
1058 /* enables peer's certificate verification */
1059 p_sys->pf_handshake = gnutls_HandshakeAndValidate;
1066 * Adds a certificates revocation list to be sent to TLS clients.
1068 * @param psz_crl_path (Unicode) path of the CRL file.
1070 * @return -1 on error, 0 on success.
1073 gnutls_ServerAddCRL( tls_server_t *p_server, const char *psz_crl_path )
1076 char *psz_local_path = ToLocale( psz_crl_path );
1078 val = gnutls_certificate_set_x509_crl_file( ((tls_server_sys_t *)
1079 (p_server->p_sys))->x509_cred,
1081 GNUTLS_X509_FMT_PEM );
1082 LocaleFree( psz_crl_path );
1085 msg_Err( p_server, "cannot add CRL (%s): %s", psz_crl_path,
1086 gnutls_strerror( val ) );
1087 return VLC_EGENERIC;
1089 msg_Dbg( p_server, "%d CRL added (%s)", val, psz_crl_path );
1095 * Allocates a whole server's TLS credentials.
1097 static int OpenServer (vlc_object_t *obj)
1099 tls_server_t *p_server = (tls_server_t *)obj;
1100 tls_server_sys_t *p_sys;
1103 if (gnutls_Init (obj))
1104 return VLC_EGENERIC;
1106 msg_Dbg (obj, "creating TLS server");
1108 p_sys = (tls_server_sys_t *)malloc( sizeof(struct tls_server_sys_t) );
1112 p_sys->i_cache_size = config_GetInt (obj, "gnutls-cache-size");
1113 p_sys->p_cache = calloc (p_sys->i_cache_size,
1114 sizeof (struct saved_session_t));
1115 if (p_sys->p_cache == NULL)
1121 p_sys->p_store = p_sys->p_cache;
1122 p_server->p_sys = p_sys;
1123 p_server->pf_add_CA = gnutls_ServerAddCA;
1124 p_server->pf_add_CRL = gnutls_ServerAddCRL;
1125 p_server->pf_open = gnutls_ServerSessionPrepare;
1126 p_server->pf_close = gnutls_SessionClose;
1128 /* No certificate validation by default */
1129 p_sys->pf_handshake = gnutls_ContinueHandshake;
1131 vlc_mutex_init( p_server, &p_sys->cache_lock );
1133 /* Sets server's credentials */
1134 val = gnutls_certificate_allocate_credentials( &p_sys->x509_cred );
1137 msg_Err( p_server, "cannot allocate X509 credentials: %s",
1138 gnutls_strerror( val ) );
1142 char *psz_cert_path = var_GetNonEmptyString (obj, "tls-x509-cert");
1143 char *psz_key_path = var_GetNonEmptyString (obj, "tls-x509-key");
1144 const char *psz_local_cert = ToLocale (psz_cert_path);
1145 const char *psz_local_key = ToLocale (psz_key_path);
1146 val = gnutls_certificate_set_x509_key_file (p_sys->x509_cred,
1147 psz_local_cert, psz_local_key,
1148 GNUTLS_X509_FMT_PEM );
1149 LocaleFree (psz_local_key);
1150 free (psz_key_path);
1151 LocaleFree (psz_local_cert);
1152 free (psz_cert_path);
1156 msg_Err( p_server, "cannot set certificate chain or private key: %s",
1157 gnutls_strerror( val ) );
1158 gnutls_certificate_free_credentials( p_sys->x509_cred );
1163 * - support other ciper suites
1165 val = gnutls_dh_params_init (&p_sys->dh_params);
1168 const gnutls_datum_t data = {
1169 .data = (unsigned char *)dh_params,
1170 .size = sizeof (dh_params) - 1,
1173 val = gnutls_dh_params_import_pkcs3 (p_sys->dh_params, &data,
1174 GNUTLS_X509_FMT_PEM);
1176 gnutls_certificate_set_dh_params (p_sys->x509_cred,
1181 msg_Err (p_server, "cannot initialize DHE cipher suites: %s",
1182 gnutls_strerror (val));
1188 vlc_mutex_destroy (&p_sys->cache_lock);
1189 free (p_sys->p_cache);
1191 return VLC_EGENERIC;
1195 * Destroys a TLS server object.
1197 static void CloseServer (vlc_object_t *p_server)
1199 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
1201 vlc_mutex_destroy (&p_sys->cache_lock);
1202 free (p_sys->p_cache);
1204 /* all sessions depending on the server are now deinitialized */
1205 gnutls_certificate_free_credentials (p_sys->x509_cred);
1206 gnutls_dh_params_deinit (p_sys->dh_params);
1209 gnutls_Deinit (p_server);