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 <vlc_common.h>
33 #include <vlc_plugin.h>
37 #include <sys/types.h>
42 #ifdef HAVE_SYS_STAT_H
43 # include <sys/stat.h>
54 #include <vlc_charset.h>
55 #include <vlc_block.h>
58 #include <gnutls/gnutls.h>
59 #include <gnutls/x509.h>
61 #include <vlc_gcrypt.h>
63 #define CACHE_TIMEOUT 3600
70 /*****************************************************************************
72 *****************************************************************************/
73 static int OpenClient (vlc_object_t *);
74 static void CloseClient (vlc_object_t *);
75 static int OpenServer (vlc_object_t *);
76 static void CloseServer (vlc_object_t *);
78 #define CACHE_TIMEOUT_TEXT N_("Expiration time for resumed TLS sessions")
79 #define CACHE_TIMEOUT_LONGTEXT N_( \
80 "It is possible to cache the resumed TLS sessions. This is the expiration "\
81 "time of the sessions stored in this cache, in seconds." )
83 #define CACHE_SIZE_TEXT N_("Number of resumed TLS sessions")
84 #define CACHE_SIZE_LONGTEXT N_( \
85 "This is the maximum number of resumed TLS sessions that " \
86 "the cache will hold." )
89 set_shortname( "GnuTLS" );
90 set_description( N_("GnuTLS transport layer security") );
91 set_capability( "tls client", 1 );
92 set_callbacks( OpenClient, CloseClient );
93 set_category( CAT_ADVANCED );
94 set_subcategory( SUBCAT_ADVANCED_MISC );
96 add_obsolete_bool( "tls-check-cert" );
97 add_obsolete_bool( "tls-check-hostname" );
100 set_description( N_("GnuTLS server") );
101 set_capability( "tls server", 1 );
102 set_category( CAT_ADVANCED );
103 set_subcategory( SUBCAT_ADVANCED_MISC );
104 set_callbacks( OpenServer, CloseServer );
106 add_obsolete_integer( "gnutls-dh-bits" );
107 add_integer( "gnutls-cache-timeout", CACHE_TIMEOUT, NULL,
108 CACHE_TIMEOUT_TEXT, CACHE_TIMEOUT_LONGTEXT, true );
109 add_integer( "gnutls-cache-size", CACHE_SIZE, NULL, CACHE_SIZE_TEXT,
110 CACHE_SIZE_LONGTEXT, true );
113 static vlc_mutex_t gnutls_mutex = VLC_STATIC_MUTEX;
116 * Initializes GnuTLS with proper locking.
117 * @return VLC_SUCCESS on success, a VLC error code otherwise.
119 static int gnutls_Init (vlc_object_t *p_this)
121 int ret = VLC_EGENERIC;
123 vlc_gcrypt_init (); /* GnuTLS depends on gcrypt */
125 vlc_mutex_lock (&gnutls_mutex);
126 if (gnutls_global_init ())
128 msg_Err (p_this, "cannot initialize GnuTLS");
132 const char *psz_version = gnutls_check_version ("1.3.3");
133 if (psz_version == NULL)
135 msg_Err (p_this, "unsupported GnuTLS version");
136 gnutls_global_deinit ();
140 msg_Dbg (p_this, "GnuTLS v%s initialized", psz_version);
144 vlc_mutex_unlock (&gnutls_mutex);
150 * Deinitializes GnuTLS.
152 static void gnutls_Deinit (vlc_object_t *p_this)
154 vlc_mutex_lock (&gnutls_mutex);
156 gnutls_global_deinit ();
157 msg_Dbg (p_this, "GnuTLS deinitialized");
158 vlc_mutex_unlock (&gnutls_mutex);
162 static int gnutls_Error (vlc_object_t *obj, int val)
171 /* WinSock does not return EAGAIN, return EINTR instead */
173 case GNUTLS_E_INTERRUPTED:
175 WSASetLastError (WSAEINTR);
182 msg_Err (obj, "%s", gnutls_strerror (val));
184 if (!gnutls_error_is_fatal (val))
185 msg_Err (obj, "Error above should be handled");
188 WSASetLastError (WSAECONNRESET);
197 struct tls_session_sys_t
199 gnutls_session_t session;
206 * Sends data through a TLS session.
209 gnutls_Send( void *p_session, const void *buf, int i_length )
212 tls_session_sys_t *p_sys;
214 p_sys = (tls_session_sys_t *)(((tls_session_t *)p_session)->p_sys);
216 val = gnutls_record_send( p_sys->session, buf, i_length );
217 return (val < 0) ? gnutls_Error ((vlc_object_t *)p_session, val) : val;
222 * Receives data through a TLS session.
225 gnutls_Recv( void *p_session, void *buf, int i_length )
228 tls_session_sys_t *p_sys;
230 p_sys = (tls_session_sys_t *)(((tls_session_t *)p_session)->p_sys);
232 val = gnutls_record_recv( p_sys->session, buf, i_length );
233 return (val < 0) ? gnutls_Error ((vlc_object_t *)p_session, val) : val;
238 * Starts or continues the TLS handshake.
240 * @return -1 on fatal error, 0 on succesful handshake completion,
241 * 1 if more would-be blocking recv is needed,
242 * 2 if more would-be blocking send is required.
245 gnutls_ContinueHandshake (tls_session_t *p_session)
247 tls_session_sys_t *p_sys = p_session->p_sys;
251 WSASetLastError( 0 );
253 val = gnutls_handshake( p_sys->session );
254 if( ( val == GNUTLS_E_AGAIN ) || ( val == GNUTLS_E_INTERRUPTED ) )
255 return 1 + gnutls_record_get_direction( p_sys->session );
260 msg_Dbg( p_session, "Winsock error %d", WSAGetLastError( ) );
262 msg_Err( p_session, "TLS handshake error: %s",
263 gnutls_strerror( val ) );
267 p_sys->b_handshaked = true;
278 static const error_msg_t cert_errors[] =
280 { GNUTLS_CERT_INVALID,
281 "Certificate could not be verified" },
282 { GNUTLS_CERT_REVOKED,
283 "Certificate was revoked" },
284 { GNUTLS_CERT_SIGNER_NOT_FOUND,
285 "Certificate's signer was not found" },
286 { GNUTLS_CERT_SIGNER_NOT_CA,
287 "Certificate's signer is not a CA" },
288 { GNUTLS_CERT_INSECURE_ALGORITHM,
289 "Insecure certificate signature algorithm" },
295 gnutls_HandshakeAndValidate( tls_session_t *session )
297 int val = gnutls_ContinueHandshake( session );
301 tls_session_sys_t *p_sys = (tls_session_sys_t *)(session->p_sys);
303 /* certificates chain verification */
305 val = gnutls_certificate_verify_peers2( p_sys->session, &status );
309 msg_Err( session, "Certificate verification failed: %s",
310 gnutls_strerror( val ) );
316 msg_Err( session, "TLS session: access denied" );
317 for( const error_msg_t *e = cert_errors; e->flag; e++ )
319 if( status & e->flag )
321 msg_Err( session, "%s", e->msg );
328 "unknown certificate error (you found a bug in VLC)" );
333 /* certificate (host)name verification */
334 const gnutls_datum_t *data;
335 data = gnutls_certificate_get_peers (p_sys->session, &(unsigned){0});
338 msg_Err( session, "Peer certificate not available" );
342 gnutls_x509_crt_t cert;
343 val = gnutls_x509_crt_init( &cert );
346 msg_Err( session, "x509 fatal error: %s", gnutls_strerror( val ) );
350 val = gnutls_x509_crt_import( cert, data, GNUTLS_X509_FMT_DER );
353 msg_Err( session, "Certificate import error: %s",
354 gnutls_strerror( val ) );
358 assert( p_sys->psz_hostname != NULL );
359 if ( !gnutls_x509_crt_check_hostname( cert, p_sys->psz_hostname ) )
361 msg_Err( session, "Certificate does not match \"%s\"",
362 p_sys->psz_hostname );
366 if( gnutls_x509_crt_get_expiration_time( cert ) < time( NULL ) )
368 msg_Err( session, "Certificate expired" );
372 if( gnutls_x509_crt_get_activation_time( cert ) > time ( NULL ) )
374 msg_Err( session, "Certificate not yet valid" );
378 gnutls_x509_crt_deinit( cert );
379 msg_Dbg( session, "TLS/x509 certificate verified" );
383 gnutls_x509_crt_deinit( cert );
388 * Sets the operating system file descriptor backend for the TLS sesison.
390 * @param fd stream socket already connected with the peer.
393 gnutls_SetFD (tls_session_t *p_session, int fd)
395 gnutls_transport_set_ptr (p_session->p_sys->session,
396 (gnutls_transport_ptr_t)(intptr_t)fd);
399 typedef int (*tls_prio_func) (gnutls_session_t, const int *);
402 gnutls_SetPriority (vlc_object_t *restrict obj, const char *restrict name,
403 tls_prio_func func, gnutls_session_t session,
404 const int *restrict values)
406 int val = func (session, values);
409 msg_Err (obj, "cannot set %s priorities: %s", name,
410 gnutls_strerror (val));
418 gnutls_SessionPrioritize (vlc_object_t *obj, gnutls_session_t session)
420 /* Note that ordering matters (on the client side) */
421 static const int protos[] =
428 static const int comps[] =
434 static const int macs[] =
437 GNUTLS_MAC_RMD160, // RIPEMD
443 static const int ciphers[] =
445 GNUTLS_CIPHER_AES_256_CBC,
446 GNUTLS_CIPHER_AES_128_CBC,
447 GNUTLS_CIPHER_3DES_CBC,
448 GNUTLS_CIPHER_ARCFOUR_128,
449 //GNUTLS_CIPHER_DES_CBC,
450 //GNUTLS_CIPHER_ARCFOUR_40,
451 //GNUTLS_CIPHER_RC2_40_CBC,
452 //GNUTLS_CIPHER_NULL,
455 static const int kx[] =
460 //GNUTLS_KX_RSA_EXPORT,
461 //GNUTLS_KX_DHE_PSK, TODO
462 //GNUTLS_KX_PSK, TODO
463 //GNUTLS_KX_SRP_RSA, TODO
464 //GNUTLS_KX_SRP_DSS, TODO
465 //GNUTLS_KX_SRP, TODO
469 static const int cert_types[] =
472 //GNUTLS_CRT_OPENPGP, TODO
476 int val = gnutls_set_default_priority (session);
479 msg_Err (obj, "cannot set default TLS priorities: %s",
480 gnutls_strerror (val));
484 if (gnutls_SetPriority (obj, "protocols",
485 gnutls_protocol_set_priority, session, protos)
486 || gnutls_SetPriority (obj, "compression algorithms",
487 gnutls_compression_set_priority, session, comps)
488 || gnutls_SetPriority (obj, "MAC algorithms",
489 gnutls_mac_set_priority, session, macs)
490 || gnutls_SetPriority (obj, "ciphers",
491 gnutls_cipher_set_priority, session, ciphers)
492 || gnutls_SetPriority (obj, "key exchange algorithms",
493 gnutls_kx_set_priority, session, kx)
494 || gnutls_SetPriority (obj, "certificate types",
495 gnutls_certificate_type_set_priority, session,
504 gnutls_Addx509File( vlc_object_t *p_this,
505 gnutls_certificate_credentials_t cred,
506 const char *psz_path, bool b_priv );
509 gnutls_Addx509Directory( vlc_object_t *p_this,
510 gnutls_certificate_credentials_t cred,
511 const char *psz_dirname,
516 if( *psz_dirname == '\0' )
519 dir = utf8_opendir( psz_dirname );
524 msg_Err (p_this, "cannot open directory (%s): %m", psz_dirname);
528 msg_Dbg (p_this, "creating empty certificate directory: %s",
530 utf8_mkdir (psz_dirname, b_priv ? 0700 : 0755);
536 struct stat st1, st2;
537 int fd = dirfd( dir );
540 * Gets stats for the directory path, checks that it is not a
541 * symbolic link (to avoid possibly infinite recursion), and verifies
542 * that the inode is still the same, to avoid TOCTOU race condition.
545 || fstat( fd, &st1 ) || utf8_lstat( psz_dirname, &st2 )
546 || S_ISLNK( st2.st_mode ) || ( st1.st_ino != st2.st_ino ) )
556 char *ent = utf8_readdir (dir);
560 if ((strcmp (ent, ".") == 0) || (strcmp (ent, "..") == 0))
563 char path[strlen (psz_dirname) + strlen (ent) + 2];
564 sprintf (path, "%s"DIR_SEP"%s", psz_dirname, ent);
567 gnutls_Addx509File( p_this, cred, path, b_priv );
576 gnutls_Addx509File( vlc_object_t *p_this,
577 gnutls_certificate_credentials cred,
578 const char *psz_path, bool b_priv )
582 int fd = utf8_open (psz_path, O_RDONLY, 0);
586 block_t *block = block_File (fd);
591 gnutls_datum data = {
592 .data = block->p_buffer,
593 .size = block->i_buffer,
596 ? gnutls_certificate_set_x509_key_mem (cred, &data, &data,
598 : gnutls_certificate_set_x509_trust_mem (cred, &data,
599 GNUTLS_X509_FMT_PEM);
600 block_Release (block);
604 msg_Warn (p_this, "cannot add x509 credentials (%s): %s",
605 psz_path, gnutls_strerror (res));
608 msg_Dbg (p_this, "added x509 credentials (%s)", psz_path);
612 if (!fstat (fd, &st) && S_ISDIR (st.st_mode))
615 msg_Dbg (p_this, "looking recursively for x509 credentials in %s",
617 return gnutls_Addx509Directory (p_this, cred, psz_path, b_priv);
621 msg_Warn (p_this, "cannot add x509 credentials (%s): %m", psz_path);
628 /** TLS client session data */
629 typedef struct tls_client_sys_t
631 struct tls_session_sys_t session;
632 gnutls_certificate_credentials_t x509_cred;
637 * Initializes a client-side TLS session.
639 static int OpenClient (vlc_object_t *obj)
641 tls_session_t *p_session = (tls_session_t *)obj;
644 if (gnutls_Init (obj))
647 tls_client_sys_t *p_sys = malloc (sizeof (*p_sys));
654 p_session->p_sys = &p_sys->session;
655 p_session->sock.p_sys = p_session;
656 p_session->sock.pf_send = gnutls_Send;
657 p_session->sock.pf_recv = gnutls_Recv;
658 p_session->pf_set_fd = gnutls_SetFD;
660 p_sys->session.b_handshaked = false;
662 i_val = gnutls_certificate_allocate_credentials (&p_sys->x509_cred);
665 msg_Err (obj, "cannot allocate X509 credentials: %s",
666 gnutls_strerror (i_val));
670 char *userdir = config_GetUserDataDir ();
673 char path[strlen (userdir) + sizeof ("/ssl/private")];
674 sprintf (path, "%s/ssl", userdir);
675 utf8_mkdir (path, 0755);
677 sprintf (path, "%s/ssl/certs", userdir);
678 gnutls_Addx509Directory (VLC_OBJECT (p_session),
679 p_sys->x509_cred, path, false);
680 sprintf (path, "%s/ssl/private", userdir);
681 gnutls_Addx509Directory (VLC_OBJECT (p_session), p_sys->x509_cred,
686 const char *confdir = config_GetConfDir ();
688 char path[strlen (confdir)
689 + sizeof ("/ssl/certs/ca-certificates.crt")];
690 sprintf (path, "%s/ssl/certs/ca-certificates.crt", confdir);
691 gnutls_Addx509File (VLC_OBJECT (p_session),
692 p_sys->x509_cred, path, false);
694 p_session->pf_handshake = gnutls_HandshakeAndValidate;
695 /*p_session->pf_handshake = gnutls_ContinueHandshake;*/
697 i_val = gnutls_init (&p_sys->session.session, GNUTLS_CLIENT);
700 msg_Err (obj, "cannot initialize TLS session: %s",
701 gnutls_strerror (i_val));
702 gnutls_certificate_free_credentials (p_sys->x509_cred);
706 if (gnutls_SessionPrioritize (VLC_OBJECT (p_session),
707 p_sys->session.session))
710 /* minimum DH prime bits */
711 gnutls_dh_set_prime_bits (p_sys->session.session, 1024);
713 i_val = gnutls_credentials_set (p_sys->session.session,
714 GNUTLS_CRD_CERTIFICATE,
718 msg_Err (obj, "cannot set TLS session credentials: %s",
719 gnutls_strerror (i_val));
723 char *servername = var_GetNonEmptyString (p_session, "tls-server-name");
724 if (servername == NULL )
725 msg_Err (p_session, "server name missing for TLS session");
727 gnutls_server_name_set (p_sys->session.session, GNUTLS_NAME_DNS,
728 servername, strlen (servername));
730 p_sys->session.psz_hostname = servername;
735 gnutls_deinit (p_sys->session.session);
736 gnutls_certificate_free_credentials (p_sys->x509_cred);
744 static void CloseClient (vlc_object_t *obj)
746 tls_session_t *client = (tls_session_t *)obj;
747 tls_client_sys_t *p_sys = (tls_client_sys_t *)(client->p_sys);
749 if (p_sys->session.b_handshaked == true)
750 gnutls_bye (p_sys->session.session, GNUTLS_SHUT_WR);
751 gnutls_deinit (p_sys->session.session);
752 /* credentials must be free'd *after* gnutls_deinit() */
753 gnutls_certificate_free_credentials (p_sys->x509_cred);
756 free (p_sys->session.psz_hostname);
764 struct tls_server_sys_t
766 gnutls_certificate_credentials_t x509_cred;
767 gnutls_dh_params_t dh_params;
769 struct saved_session_t *p_cache;
770 struct saved_session_t *p_store;
772 vlc_mutex_t cache_lock;
774 int (*pf_handshake) (tls_session_t *);
779 * TLS session resumption callbacks (server-side)
781 #define MAX_SESSION_ID 32
782 #define MAX_SESSION_DATA 1024
784 typedef struct saved_session_t
786 char id[MAX_SESSION_ID];
787 char data[MAX_SESSION_DATA];
794 static int cb_store( void *p_server, gnutls_datum key, gnutls_datum data )
796 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
798 if( ( p_sys->i_cache_size == 0 )
799 || ( key.size > MAX_SESSION_ID )
800 || ( data.size > MAX_SESSION_DATA ) )
803 vlc_mutex_lock( &p_sys->cache_lock );
805 memcpy( p_sys->p_store->id, key.data, key.size);
806 memcpy( p_sys->p_store->data, data.data, data.size );
807 p_sys->p_store->i_idlen = key.size;
808 p_sys->p_store->i_datalen = data.size;
811 if( ( p_sys->p_store - p_sys->p_cache ) == p_sys->i_cache_size )
812 p_sys->p_store = p_sys->p_cache;
814 vlc_mutex_unlock( &p_sys->cache_lock );
820 static gnutls_datum cb_fetch( void *p_server, gnutls_datum key )
822 static const gnutls_datum_t err_datum = { NULL, 0 };
823 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
824 saved_session_t *p_session, *p_end;
826 p_session = p_sys->p_cache;
827 p_end = p_session + p_sys->i_cache_size;
829 vlc_mutex_lock( &p_sys->cache_lock );
831 while( p_session < p_end )
833 if( ( p_session->i_idlen == key.size )
834 && !memcmp( p_session->id, key.data, key.size ) )
838 data.size = p_session->i_datalen;
840 data.data = gnutls_malloc( data.size );
841 if( data.data == NULL )
843 vlc_mutex_unlock( &p_sys->cache_lock );
847 memcpy( data.data, p_session->data, data.size );
848 vlc_mutex_unlock( &p_sys->cache_lock );
854 vlc_mutex_unlock( &p_sys->cache_lock );
860 static int cb_delete( void *p_server, gnutls_datum key )
862 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
863 saved_session_t *p_session, *p_end;
865 p_session = p_sys->p_cache;
866 p_end = p_session + p_sys->i_cache_size;
868 vlc_mutex_lock( &p_sys->cache_lock );
870 while( p_session < p_end )
872 if( ( p_session->i_idlen == key.size )
873 && !memcmp( p_session->id, key.data, key.size ) )
875 p_session->i_datalen = p_session->i_idlen = 0;
876 vlc_mutex_unlock( &p_sys->cache_lock );
882 vlc_mutex_unlock( &p_sys->cache_lock );
889 * Terminates TLS session and releases session data.
890 * You still have to close the socket yourself.
893 gnutls_SessionClose (tls_server_t *p_server, tls_session_t *p_session)
895 tls_session_sys_t *p_sys = p_session->p_sys;
898 if( p_sys->b_handshaked == true )
899 gnutls_bye( p_sys->session, GNUTLS_SHUT_WR );
900 gnutls_deinit( p_sys->session );
902 vlc_object_detach( p_session );
903 vlc_object_release( p_session );
910 * Initializes a server-side TLS session.
912 static tls_session_t *
913 gnutls_ServerSessionPrepare( tls_server_t *p_server )
915 tls_session_t *p_session;
916 tls_server_sys_t *p_server_sys;
917 gnutls_session_t session;
920 p_session = vlc_object_create( p_server, sizeof (struct tls_session_t) );
921 if( p_session == NULL )
924 p_session->p_sys = malloc( sizeof(struct tls_session_sys_t) );
925 if( p_session->p_sys == NULL )
927 vlc_object_release( p_session );
931 p_server_sys = p_server->p_sys;
932 p_session->sock.p_sys = p_session;
933 p_session->sock.pf_send = gnutls_Send;
934 p_session->sock.pf_recv = gnutls_Recv;
935 p_session->pf_set_fd = gnutls_SetFD;
936 p_session->pf_handshake = p_server_sys->pf_handshake;
938 p_session->p_sys->b_handshaked = false;
939 p_session->p_sys->psz_hostname = NULL;
941 i_val = gnutls_init( &session, GNUTLS_SERVER );
944 msg_Err( p_server, "cannot initialize TLS session: %s",
945 gnutls_strerror( i_val ) );
949 p_session->p_sys->session = session;
951 if (gnutls_SessionPrioritize (VLC_OBJECT (p_session), session))
953 gnutls_deinit( session );
957 i_val = gnutls_credentials_set( session, GNUTLS_CRD_CERTIFICATE,
958 p_server_sys->x509_cred );
961 msg_Err( p_server, "cannot set TLS session credentials: %s",
962 gnutls_strerror( i_val ) );
963 gnutls_deinit( session );
967 if (p_session->pf_handshake == gnutls_HandshakeAndValidate)
968 gnutls_certificate_server_set_request (session, GNUTLS_CERT_REQUIRE);
970 /* Session resumption support */
971 i_val = config_GetInt (p_server, "gnutls-cache-timeout");
973 gnutls_db_set_cache_expiration (session, i_val);
974 gnutls_db_set_retrieve_function( session, cb_fetch );
975 gnutls_db_set_remove_function( session, cb_delete );
976 gnutls_db_set_store_function( session, cb_store );
977 gnutls_db_set_ptr( session, p_server );
982 free( p_session->p_sys );
983 vlc_object_detach( p_session );
984 vlc_object_release( p_session );
990 * Adds one or more certificate authorities.
992 * @param psz_ca_path (Unicode) path to an x509 certificates list.
994 * @return -1 on error, 0 on success.
997 gnutls_ServerAddCA( tls_server_t *p_server, const char *psz_ca_path )
999 tls_server_sys_t *p_sys;
1000 char *psz_local_path;
1003 p_sys = (tls_server_sys_t *)(p_server->p_sys);
1005 psz_local_path = ToLocale( psz_ca_path );
1006 val = gnutls_certificate_set_x509_trust_file( p_sys->x509_cred,
1008 GNUTLS_X509_FMT_PEM );
1009 LocaleFree( psz_local_path );
1012 msg_Err( p_server, "cannot add trusted CA (%s): %s", psz_ca_path,
1013 gnutls_strerror( val ) );
1014 return VLC_EGENERIC;
1016 msg_Dbg( p_server, " %d trusted CA added (%s)", val, psz_ca_path );
1018 /* enables peer's certificate verification */
1019 p_sys->pf_handshake = gnutls_HandshakeAndValidate;
1026 * Adds a certificates revocation list to be sent to TLS clients.
1028 * @param psz_crl_path (Unicode) path of the CRL file.
1030 * @return -1 on error, 0 on success.
1033 gnutls_ServerAddCRL( tls_server_t *p_server, const char *psz_crl_path )
1036 char *psz_local_path = ToLocale( psz_crl_path );
1038 val = gnutls_certificate_set_x509_crl_file( ((tls_server_sys_t *)
1039 (p_server->p_sys))->x509_cred,
1041 GNUTLS_X509_FMT_PEM );
1042 LocaleFree( psz_crl_path );
1045 msg_Err( p_server, "cannot add CRL (%s): %s", psz_crl_path,
1046 gnutls_strerror( val ) );
1047 return VLC_EGENERIC;
1049 msg_Dbg( p_server, "%d CRL added (%s)", val, psz_crl_path );
1055 * Allocates a whole server's TLS credentials.
1057 static int OpenServer (vlc_object_t *obj)
1059 tls_server_t *p_server = (tls_server_t *)obj;
1060 tls_server_sys_t *p_sys;
1063 if (gnutls_Init (obj))
1064 return VLC_EGENERIC;
1066 msg_Dbg (obj, "creating TLS server");
1068 p_sys = (tls_server_sys_t *)malloc( sizeof(struct tls_server_sys_t) );
1072 p_sys->i_cache_size = config_GetInt (obj, "gnutls-cache-size");
1073 if (p_sys->i_cache_size == -1) /* Duh, config subsystem exploded?! */
1074 p_sys->i_cache_size = 0;
1075 p_sys->p_cache = calloc (p_sys->i_cache_size,
1076 sizeof (struct saved_session_t));
1077 if (p_sys->p_cache == NULL)
1083 p_sys->p_store = p_sys->p_cache;
1084 p_server->p_sys = p_sys;
1085 p_server->pf_add_CA = gnutls_ServerAddCA;
1086 p_server->pf_add_CRL = gnutls_ServerAddCRL;
1087 p_server->pf_open = gnutls_ServerSessionPrepare;
1088 p_server->pf_close = gnutls_SessionClose;
1090 /* No certificate validation by default */
1091 p_sys->pf_handshake = gnutls_ContinueHandshake;
1093 vlc_mutex_init( &p_sys->cache_lock );
1095 /* Sets server's credentials */
1096 val = gnutls_certificate_allocate_credentials( &p_sys->x509_cred );
1099 msg_Err( p_server, "cannot allocate X509 credentials: %s",
1100 gnutls_strerror( val ) );
1104 char *psz_cert_path = var_GetNonEmptyString (obj, "tls-x509-cert");
1105 char *psz_key_path = var_GetNonEmptyString (obj, "tls-x509-key");
1106 const char *psz_local_cert = ToLocale (psz_cert_path);
1107 const char *psz_local_key = ToLocale (psz_key_path);
1108 val = gnutls_certificate_set_x509_key_file (p_sys->x509_cred,
1109 psz_local_cert, psz_local_key,
1110 GNUTLS_X509_FMT_PEM );
1111 LocaleFree (psz_local_key);
1112 free (psz_key_path);
1113 LocaleFree (psz_local_cert);
1114 free (psz_cert_path);
1118 msg_Err( p_server, "cannot set certificate chain or private key: %s",
1119 gnutls_strerror( val ) );
1120 gnutls_certificate_free_credentials( p_sys->x509_cred );
1125 * - support other ciper suites
1127 val = gnutls_dh_params_init (&p_sys->dh_params);
1130 const gnutls_datum_t data = {
1131 .data = (unsigned char *)dh_params,
1132 .size = sizeof (dh_params) - 1,
1135 val = gnutls_dh_params_import_pkcs3 (p_sys->dh_params, &data,
1136 GNUTLS_X509_FMT_PEM);
1138 gnutls_certificate_set_dh_params (p_sys->x509_cred,
1143 msg_Err (p_server, "cannot initialize DHE cipher suites: %s",
1144 gnutls_strerror (val));
1150 vlc_mutex_destroy (&p_sys->cache_lock);
1151 free (p_sys->p_cache);
1153 return VLC_EGENERIC;
1157 * Destroys a TLS server object.
1159 static void CloseServer (vlc_object_t *p_server)
1161 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
1163 vlc_mutex_destroy (&p_sys->cache_lock);
1164 free (p_sys->p_cache);
1166 /* all sessions depending on the server are now deinitialized */
1167 gnutls_certificate_free_credentials (p_sys->x509_cred);
1168 gnutls_dh_params_deinit (p_sys->dh_params);
1171 gnutls_Deinit (p_server);