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 <vlc_plugin.h>
37 #include <sys/types.h>
42 #ifdef HAVE_SYS_STAT_H
43 # include <sys/stat.h>
51 #include <vlc_charset.h>
54 #include <gnutls/gnutls.h>
55 #include <gnutls/x509.h>
57 #include <vlc_gcrypt.h>
59 #define CACHE_TIMEOUT 3600
64 /*****************************************************************************
66 *****************************************************************************/
67 static int OpenClient (vlc_object_t *);
68 static void CloseClient (vlc_object_t *);
69 static int OpenServer (vlc_object_t *);
70 static void CloseServer (vlc_object_t *);
72 #define CACHE_TIMEOUT_TEXT N_("Expiration time for resumed TLS sessions")
73 #define CACHE_TIMEOUT_LONGTEXT N_( \
74 "It is possible to cache the resumed TLS sessions. This is the expiration "\
75 "time of the sessions stored in this cache, in seconds." )
77 #define CACHE_SIZE_TEXT N_("Number of resumed TLS sessions")
78 #define CACHE_SIZE_LONGTEXT N_( \
79 "This is the maximum number of resumed TLS sessions that " \
80 "the cache will hold." )
83 set_shortname( "GnuTLS" );
84 set_description( _("GnuTLS transport layer security") );
85 set_capability( "tls client", 1 );
86 set_callbacks( OpenClient, CloseClient );
87 set_category( CAT_ADVANCED );
88 set_subcategory( SUBCAT_ADVANCED_MISC );
90 add_obsolete_bool( "tls-check-cert" );
91 add_obsolete_bool( "tls-check-hostname" );
94 set_description( _("GnuTLS server") );
95 set_capability( "tls server", 1 );
96 set_category( CAT_ADVANCED );
97 set_subcategory( SUBCAT_ADVANCED_MISC );
98 set_callbacks( OpenServer, CloseServer );
100 add_obsolete_integer( "gnutls-dh-bits" );
101 add_integer( "gnutls-cache-timeout", CACHE_TIMEOUT, NULL,
102 CACHE_TIMEOUT_TEXT, CACHE_TIMEOUT_LONGTEXT, true );
103 add_integer( "gnutls-cache-size", CACHE_SIZE, NULL, CACHE_SIZE_TEXT,
104 CACHE_SIZE_LONGTEXT, true );
108 * Initializes GnuTLS with proper locking.
109 * @return VLC_SUCCESS on success, a VLC error code otherwise.
111 static int gnutls_Init (vlc_object_t *p_this)
113 int ret = VLC_EGENERIC;
115 vlc_gcrypt_init (); /* GnuTLS depends on gcrypt */
117 vlc_mutex_t *lock = var_AcquireMutex ("gnutls_mutex");
118 if (gnutls_global_init ())
120 msg_Err (p_this, "cannot initialize GnuTLS");
124 const char *psz_version = gnutls_check_version ("1.3.3");
125 if (psz_version == NULL)
127 msg_Err (p_this, "unsupported GnuTLS version");
128 gnutls_global_deinit ();
132 msg_Dbg (p_this, "GnuTLS v%s initialized", psz_version);
136 vlc_mutex_unlock (lock);
142 * Deinitializes GnuTLS.
144 static void gnutls_Deinit (vlc_object_t *p_this)
146 vlc_mutex_t *lock = var_AcquireMutex( "gnutls_mutex" );
148 gnutls_global_deinit ();
149 msg_Dbg (p_this, "GnuTLS deinitialized");
150 vlc_mutex_unlock (lock);
154 static int gnutls_Error (vlc_object_t *obj, int val)
163 /* WinSock does not return EAGAIN, return EINTR instead */
165 case GNUTLS_E_INTERRUPTED:
167 WSASetLastError (WSAEINTR);
174 msg_Err (obj, "%s", gnutls_strerror (val));
176 if (!gnutls_error_is_fatal (val))
177 msg_Err (obj, "Error above should be handled");
180 WSASetLastError (WSAECONNRESET);
189 struct tls_session_sys_t
191 gnutls_session_t session;
198 * Sends data through a TLS session.
201 gnutls_Send( void *p_session, const void *buf, int i_length )
204 tls_session_sys_t *p_sys;
206 p_sys = (tls_session_sys_t *)(((tls_session_t *)p_session)->p_sys);
208 val = gnutls_record_send( p_sys->session, buf, i_length );
209 return (val < 0) ? gnutls_Error ((vlc_object_t *)p_session, val) : val;
214 * Receives data through a TLS session.
217 gnutls_Recv( void *p_session, void *buf, int i_length )
220 tls_session_sys_t *p_sys;
222 p_sys = (tls_session_sys_t *)(((tls_session_t *)p_session)->p_sys);
224 val = gnutls_record_recv( p_sys->session, buf, i_length );
225 return (val < 0) ? gnutls_Error ((vlc_object_t *)p_session, val) : val;
230 * Starts or continues the TLS handshake.
232 * @return -1 on fatal error, 0 on succesful handshake completion,
233 * 1 if more would-be blocking recv is needed,
234 * 2 if more would-be blocking send is required.
237 gnutls_ContinueHandshake (tls_session_t *p_session)
239 tls_session_sys_t *p_sys = p_session->p_sys;
243 WSASetLastError( 0 );
245 val = gnutls_handshake( p_sys->session );
246 if( ( val == GNUTLS_E_AGAIN ) || ( val == GNUTLS_E_INTERRUPTED ) )
247 return 1 + gnutls_record_get_direction( p_sys->session );
252 msg_Dbg( p_session, "Winsock error %d", WSAGetLastError( ) );
254 msg_Err( p_session, "TLS handshake error: %s",
255 gnutls_strerror( val ) );
259 p_sys->b_handshaked = true;
270 static const error_msg_t cert_errors[] =
272 { GNUTLS_CERT_INVALID,
273 "Certificate could not be verified" },
274 { GNUTLS_CERT_REVOKED,
275 "Certificate was revoked" },
276 { GNUTLS_CERT_SIGNER_NOT_FOUND,
277 "Certificate's signer was not found" },
278 { GNUTLS_CERT_SIGNER_NOT_CA,
279 "Certificate's signer is not a CA" },
280 { GNUTLS_CERT_INSECURE_ALGORITHM,
281 "Insecure certificate signature algorithm" },
287 gnutls_HandshakeAndValidate( tls_session_t *session )
289 int val = gnutls_ContinueHandshake( session );
293 tls_session_sys_t *p_sys = (tls_session_sys_t *)(session->p_sys);
295 /* certificates chain verification */
297 val = gnutls_certificate_verify_peers2( p_sys->session, &status );
301 msg_Err( session, "Certificate verification failed: %s",
302 gnutls_strerror( val ) );
308 msg_Err( session, "TLS session: access denied" );
309 for( const error_msg_t *e = cert_errors; e->flag; e++ )
311 if( status & e->flag )
313 msg_Err( session, "%s", e->msg );
320 "unknown certificate error (you found a bug in VLC)" );
325 /* certificate (host)name verification */
326 const gnutls_datum_t *data;
327 data = gnutls_certificate_get_peers (p_sys->session, &(unsigned){0});
330 msg_Err( session, "Peer certificate not available" );
334 gnutls_x509_crt_t cert;
335 val = gnutls_x509_crt_init( &cert );
338 msg_Err( session, "x509 fatal error: %s", gnutls_strerror( val ) );
342 val = gnutls_x509_crt_import( cert, data, GNUTLS_X509_FMT_DER );
345 msg_Err( session, "Certificate import error: %s",
346 gnutls_strerror( val ) );
350 assert( p_sys->psz_hostname != NULL );
351 if ( !gnutls_x509_crt_check_hostname( cert, p_sys->psz_hostname ) )
353 msg_Err( session, "Certificate does not match \"%s\"",
354 p_sys->psz_hostname );
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 );
380 * Sets the operating system file descriptor backend for the TLS sesison.
382 * @param fd stream socket already connected with the peer.
385 gnutls_SetFD (tls_session_t *p_session, int fd)
387 gnutls_transport_set_ptr (p_session->p_sys->session,
388 (gnutls_transport_ptr_t)(intptr_t)fd);
391 typedef int (*tls_prio_func) (gnutls_session_t, const int *);
394 gnutls_SetPriority (vlc_object_t *restrict obj, const char *restrict name,
395 tls_prio_func func, gnutls_session_t session,
396 const int *restrict values)
398 int val = func (session, values);
401 msg_Err (obj, "cannot set %s priorities: %s", name,
402 gnutls_strerror (val));
410 gnutls_SessionPrioritize (vlc_object_t *obj, gnutls_session_t session)
412 /* Note that ordering matters (on the client side) */
413 static const int protos[] =
420 static const int comps[] =
426 static const int macs[] =
429 GNUTLS_MAC_RMD160, // RIPEMD
435 static const int ciphers[] =
437 GNUTLS_CIPHER_AES_256_CBC,
438 GNUTLS_CIPHER_AES_128_CBC,
439 GNUTLS_CIPHER_3DES_CBC,
440 GNUTLS_CIPHER_ARCFOUR_128,
441 //GNUTLS_CIPHER_DES_CBC,
442 //GNUTLS_CIPHER_ARCFOUR_40,
443 //GNUTLS_CIPHER_RC2_40_CBC,
444 //GNUTLS_CIPHER_NULL,
447 static const int kx[] =
452 //GNUTLS_KX_RSA_EXPORT,
453 //GNUTLS_KX_DHE_PSK, TODO
454 //GNUTLS_KX_PSK, TODO
455 //GNUTLS_KX_SRP_RSA, TODO
456 //GNUTLS_KX_SRP_DSS, TODO
457 //GNUTLS_KX_SRP, TODO
461 static const int cert_types[] =
464 //GNUTLS_CRT_OPENPGP, TODO
468 int val = gnutls_set_default_priority (session);
471 msg_Err (obj, "cannot set default TLS priorities: %s",
472 gnutls_strerror (val));
476 if (gnutls_SetPriority (obj, "protocols",
477 gnutls_protocol_set_priority, session, protos)
478 || gnutls_SetPriority (obj, "compression algorithms",
479 gnutls_compression_set_priority, session, comps)
480 || gnutls_SetPriority (obj, "MAC algorithms",
481 gnutls_mac_set_priority, session, macs)
482 || gnutls_SetPriority (obj, "ciphers",
483 gnutls_cipher_set_priority, session, ciphers)
484 || gnutls_SetPriority (obj, "key exchange algorithms",
485 gnutls_kx_set_priority, session, kx)
486 || gnutls_SetPriority (obj, "certificate types",
487 gnutls_certificate_type_set_priority, session,
496 gnutls_Addx509File( vlc_object_t *p_this,
497 gnutls_certificate_credentials_t cred,
498 const char *psz_path, bool b_priv );
501 gnutls_Addx509Directory( vlc_object_t *p_this,
502 gnutls_certificate_credentials_t cred,
503 const char *psz_dirname,
508 if( *psz_dirname == '\0' )
511 dir = utf8_opendir( psz_dirname );
516 msg_Err (p_this, "cannot open directory (%s): %m", psz_dirname);
520 msg_Dbg (p_this, "creating empty certificate directory: %s",
522 utf8_mkdir (psz_dirname, b_priv ? 0700 : 0755);
528 struct stat st1, st2;
529 int fd = dirfd( dir );
532 * Gets stats for the directory path, checks that it is not a
533 * symbolic link (to avoid possibly infinite recursion), and verifies
534 * that the inode is still the same, to avoid TOCTOU race condition.
537 || fstat( fd, &st1 ) || utf8_lstat( psz_dirname, &st2 )
538 || S_ISLNK( st2.st_mode ) || ( st1.st_ino != st2.st_ino ) )
548 char *ent = utf8_readdir (dir);
552 if ((strcmp (ent, ".") == 0) || (strcmp (ent, "..") == 0))
555 char path[strlen (psz_dirname) + strlen (ent) + 2];
556 sprintf (path, "%s"DIR_SEP"%s", psz_dirname, ent);
559 gnutls_Addx509File( p_this, cred, path, b_priv );
568 gnutls_Addx509File( vlc_object_t *p_this,
569 gnutls_certificate_credentials cred,
570 const char *psz_path, bool b_priv )
574 if( utf8_stat( psz_path, &st ) == 0 )
576 if( S_ISREG( st.st_mode ) )
578 char *psz_localname = ToLocale( psz_path );
580 ? gnutls_certificate_set_x509_key_file( cred,
581 psz_localname, psz_localname, GNUTLS_X509_FMT_PEM )
582 : gnutls_certificate_set_x509_trust_file( cred,
583 psz_localname, GNUTLS_X509_FMT_PEM );
584 LocaleFree( psz_localname );
588 msg_Warn( p_this, "cannot add x509 credentials (%s): %s",
589 psz_path, gnutls_strerror( i ) );
594 msg_Dbg( p_this, "added x509 credentials (%s)",
599 else if( S_ISDIR( st.st_mode ) )
602 "looking recursively for x509 credentials in %s",
604 return gnutls_Addx509Directory( p_this, cred, psz_path, b_priv);
608 msg_Warn( p_this, "cannot add x509 credentials (%s): %m", psz_path );
613 /** TLS client session data */
614 typedef struct tls_client_sys_t
616 struct tls_session_sys_t session;
617 gnutls_certificate_credentials_t x509_cred;
622 * Initializes a client-side TLS session.
624 static int OpenClient (vlc_object_t *obj)
626 tls_session_t *p_session = (tls_session_t *)obj;
629 if (gnutls_Init (obj))
632 tls_client_sys_t *p_sys = malloc (sizeof (*p_sys));
639 p_session->p_sys = &p_sys->session;
640 p_session->sock.p_sys = p_session;
641 p_session->sock.pf_send = gnutls_Send;
642 p_session->sock.pf_recv = gnutls_Recv;
643 p_session->pf_set_fd = gnutls_SetFD;
645 p_sys->session.b_handshaked = false;
647 i_val = gnutls_certificate_allocate_credentials (&p_sys->x509_cred);
650 msg_Err (obj, "cannot allocate X509 credentials: %s",
651 gnutls_strerror (i_val));
655 char *userdir = config_GetUserDataDir ();
658 char path[strlen (userdir) + sizeof ("/ssl/private")];
659 sprintf (path, "%s/ssl", userdir);
660 utf8_mkdir (path, 0755);
662 sprintf (path, "%s/ssl/certs", userdir);
663 gnutls_Addx509Directory (VLC_OBJECT (p_session),
664 p_sys->x509_cred, path, false);
665 sprintf (path, "%s/ssl/private", userdir);
666 gnutls_Addx509Directory (VLC_OBJECT (p_session), p_sys->x509_cred,
671 const char *confdir = config_GetConfDir ();
673 char path[strlen (confdir) + sizeof ("/ca-certificates.crt")];
674 sprintf (path, "%s/ca-certificates.crt", confdir);
675 gnutls_Addx509File (VLC_OBJECT (p_session),
676 p_sys->x509_cred, path, false);
678 p_session->pf_handshake = gnutls_HandshakeAndValidate;
679 /*p_session->pf_handshake = gnutls_ContinueHandshake;*/
681 i_val = gnutls_init (&p_sys->session.session, GNUTLS_CLIENT);
684 msg_Err (obj, "cannot initialize TLS session: %s",
685 gnutls_strerror (i_val));
686 gnutls_certificate_free_credentials (p_sys->x509_cred);
690 if (gnutls_SessionPrioritize (VLC_OBJECT (p_session),
691 p_sys->session.session))
694 /* minimum DH prime bits */
695 gnutls_dh_set_prime_bits (p_sys->session.session, 1024);
697 i_val = gnutls_credentials_set (p_sys->session.session,
698 GNUTLS_CRD_CERTIFICATE,
702 msg_Err (obj, "cannot set TLS session credentials: %s",
703 gnutls_strerror (i_val));
707 char *servername = var_GetNonEmptyString (p_session, "tls-server-name");
708 if (servername == NULL )
709 msg_Err (p_session, "server name missing for TLS session");
711 p_sys->session.psz_hostname = servername;
712 gnutls_server_name_set (p_sys->session.session, GNUTLS_NAME_DNS,
713 servername, strlen (servername));
718 gnutls_deinit (p_sys->session.session);
719 gnutls_certificate_free_credentials (p_sys->x509_cred);
727 static void CloseClient (vlc_object_t *obj)
729 tls_session_t *client = (tls_session_t *)obj;
730 tls_client_sys_t *p_sys = (tls_client_sys_t *)(client->p_sys);
732 if (p_sys->session.b_handshaked == true)
733 gnutls_bye (p_sys->session.session, GNUTLS_SHUT_WR);
734 gnutls_deinit (p_sys->session.session);
735 /* credentials must be free'd *after* gnutls_deinit() */
736 gnutls_certificate_free_credentials (p_sys->x509_cred);
739 free (p_sys->session.psz_hostname);
747 struct tls_server_sys_t
749 gnutls_certificate_credentials_t x509_cred;
750 gnutls_dh_params_t dh_params;
752 struct saved_session_t *p_cache;
753 struct saved_session_t *p_store;
755 vlc_mutex_t cache_lock;
757 int (*pf_handshake) (tls_session_t *);
762 * TLS session resumption callbacks (server-side)
764 #define MAX_SESSION_ID 32
765 #define MAX_SESSION_DATA 1024
767 typedef struct saved_session_t
769 char id[MAX_SESSION_ID];
770 char data[MAX_SESSION_DATA];
777 static int cb_store( void *p_server, gnutls_datum key, gnutls_datum data )
779 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
781 if( ( p_sys->i_cache_size == 0 )
782 || ( key.size > MAX_SESSION_ID )
783 || ( data.size > MAX_SESSION_DATA ) )
786 vlc_mutex_lock( &p_sys->cache_lock );
788 memcpy( p_sys->p_store->id, key.data, key.size);
789 memcpy( p_sys->p_store->data, data.data, data.size );
790 p_sys->p_store->i_idlen = key.size;
791 p_sys->p_store->i_datalen = data.size;
794 if( ( p_sys->p_store - p_sys->p_cache ) == p_sys->i_cache_size )
795 p_sys->p_store = p_sys->p_cache;
797 vlc_mutex_unlock( &p_sys->cache_lock );
803 static gnutls_datum cb_fetch( void *p_server, gnutls_datum key )
805 static const gnutls_datum_t err_datum = { NULL, 0 };
806 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
807 saved_session_t *p_session, *p_end;
809 p_session = p_sys->p_cache;
810 p_end = p_session + p_sys->i_cache_size;
812 vlc_mutex_lock( &p_sys->cache_lock );
814 while( p_session < p_end )
816 if( ( p_session->i_idlen == key.size )
817 && !memcmp( p_session->id, key.data, key.size ) )
821 data.size = p_session->i_datalen;
823 data.data = gnutls_malloc( data.size );
824 if( data.data == NULL )
826 vlc_mutex_unlock( &p_sys->cache_lock );
830 memcpy( data.data, p_session->data, data.size );
831 vlc_mutex_unlock( &p_sys->cache_lock );
837 vlc_mutex_unlock( &p_sys->cache_lock );
843 static int cb_delete( void *p_server, gnutls_datum key )
845 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
846 saved_session_t *p_session, *p_end;
848 p_session = p_sys->p_cache;
849 p_end = p_session + p_sys->i_cache_size;
851 vlc_mutex_lock( &p_sys->cache_lock );
853 while( p_session < p_end )
855 if( ( p_session->i_idlen == key.size )
856 && !memcmp( p_session->id, key.data, key.size ) )
858 p_session->i_datalen = p_session->i_idlen = 0;
859 vlc_mutex_unlock( &p_sys->cache_lock );
865 vlc_mutex_unlock( &p_sys->cache_lock );
872 * Terminates TLS session and releases session data.
873 * You still have to close the socket yourself.
876 gnutls_SessionClose (tls_server_t *p_server, tls_session_t *p_session)
878 tls_session_sys_t *p_sys = p_session->p_sys;
881 if( p_sys->b_handshaked == true )
882 gnutls_bye( p_sys->session, GNUTLS_SHUT_WR );
883 gnutls_deinit( p_sys->session );
885 vlc_object_detach( p_session );
886 vlc_object_release( p_session );
893 * Initializes a server-side TLS session.
895 static tls_session_t *
896 gnutls_ServerSessionPrepare( tls_server_t *p_server )
898 tls_session_t *p_session;
899 tls_server_sys_t *p_server_sys;
900 gnutls_session_t session;
903 p_session = vlc_object_create( p_server, sizeof (struct tls_session_t) );
904 if( p_session == NULL )
907 p_session->p_sys = malloc( sizeof(struct tls_session_sys_t) );
908 if( p_session->p_sys == NULL )
910 vlc_object_release( p_session );
914 p_server_sys = p_server->p_sys;
915 p_session->sock.p_sys = p_session;
916 p_session->sock.pf_send = gnutls_Send;
917 p_session->sock.pf_recv = gnutls_Recv;
918 p_session->pf_set_fd = gnutls_SetFD;
919 p_session->pf_handshake = p_server_sys->pf_handshake;
921 p_session->p_sys->b_handshaked = false;
922 p_session->p_sys->psz_hostname = NULL;
924 i_val = gnutls_init( &session, GNUTLS_SERVER );
927 msg_Err( p_server, "cannot initialize TLS session: %s",
928 gnutls_strerror( i_val ) );
932 p_session->p_sys->session = session;
934 if (gnutls_SessionPrioritize (VLC_OBJECT (p_session), session))
936 gnutls_deinit( session );
940 i_val = gnutls_credentials_set( session, GNUTLS_CRD_CERTIFICATE,
941 p_server_sys->x509_cred );
944 msg_Err( p_server, "cannot set TLS session credentials: %s",
945 gnutls_strerror( i_val ) );
946 gnutls_deinit( session );
950 if (p_session->pf_handshake == gnutls_HandshakeAndValidate)
951 gnutls_certificate_server_set_request (session, GNUTLS_CERT_REQUIRE);
953 /* Session resumption support */
954 i_val = config_GetInt (p_server, "gnutls-cache-timeout");
955 gnutls_db_set_cache_expiration (session, i_val);
956 gnutls_db_set_retrieve_function( session, cb_fetch );
957 gnutls_db_set_remove_function( session, cb_delete );
958 gnutls_db_set_store_function( session, cb_store );
959 gnutls_db_set_ptr( session, p_server );
964 free( p_session->p_sys );
965 vlc_object_detach( p_session );
966 vlc_object_release( p_session );
972 * Adds one or more certificate authorities.
974 * @param psz_ca_path (Unicode) path to an x509 certificates list.
976 * @return -1 on error, 0 on success.
979 gnutls_ServerAddCA( tls_server_t *p_server, const char *psz_ca_path )
981 tls_server_sys_t *p_sys;
982 char *psz_local_path;
985 p_sys = (tls_server_sys_t *)(p_server->p_sys);
987 psz_local_path = ToLocale( psz_ca_path );
988 val = gnutls_certificate_set_x509_trust_file( p_sys->x509_cred,
990 GNUTLS_X509_FMT_PEM );
991 LocaleFree( psz_local_path );
994 msg_Err( p_server, "cannot add trusted CA (%s): %s", psz_ca_path,
995 gnutls_strerror( val ) );
998 msg_Dbg( p_server, " %d trusted CA added (%s)", val, psz_ca_path );
1000 /* enables peer's certificate verification */
1001 p_sys->pf_handshake = gnutls_HandshakeAndValidate;
1008 * Adds a certificates revocation list to be sent to TLS clients.
1010 * @param psz_crl_path (Unicode) path of the CRL file.
1012 * @return -1 on error, 0 on success.
1015 gnutls_ServerAddCRL( tls_server_t *p_server, const char *psz_crl_path )
1018 char *psz_local_path = ToLocale( psz_crl_path );
1020 val = gnutls_certificate_set_x509_crl_file( ((tls_server_sys_t *)
1021 (p_server->p_sys))->x509_cred,
1023 GNUTLS_X509_FMT_PEM );
1024 LocaleFree( psz_crl_path );
1027 msg_Err( p_server, "cannot add CRL (%s): %s", psz_crl_path,
1028 gnutls_strerror( val ) );
1029 return VLC_EGENERIC;
1031 msg_Dbg( p_server, "%d CRL added (%s)", val, psz_crl_path );
1037 * Allocates a whole server's TLS credentials.
1039 static int OpenServer (vlc_object_t *obj)
1041 tls_server_t *p_server = (tls_server_t *)obj;
1042 tls_server_sys_t *p_sys;
1045 if (gnutls_Init (obj))
1046 return VLC_EGENERIC;
1048 msg_Dbg (obj, "creating TLS server");
1050 p_sys = (tls_server_sys_t *)malloc( sizeof(struct tls_server_sys_t) );
1054 p_sys->i_cache_size = config_GetInt (obj, "gnutls-cache-size");
1055 p_sys->p_cache = calloc (p_sys->i_cache_size,
1056 sizeof (struct saved_session_t));
1057 if (p_sys->p_cache == NULL)
1063 p_sys->p_store = p_sys->p_cache;
1064 p_server->p_sys = p_sys;
1065 p_server->pf_add_CA = gnutls_ServerAddCA;
1066 p_server->pf_add_CRL = gnutls_ServerAddCRL;
1067 p_server->pf_open = gnutls_ServerSessionPrepare;
1068 p_server->pf_close = gnutls_SessionClose;
1070 /* No certificate validation by default */
1071 p_sys->pf_handshake = gnutls_ContinueHandshake;
1073 vlc_mutex_init( &p_sys->cache_lock );
1075 /* Sets server's credentials */
1076 val = gnutls_certificate_allocate_credentials( &p_sys->x509_cred );
1079 msg_Err( p_server, "cannot allocate X509 credentials: %s",
1080 gnutls_strerror( val ) );
1084 char *psz_cert_path = var_GetNonEmptyString (obj, "tls-x509-cert");
1085 char *psz_key_path = var_GetNonEmptyString (obj, "tls-x509-key");
1086 const char *psz_local_cert = ToLocale (psz_cert_path);
1087 const char *psz_local_key = ToLocale (psz_key_path);
1088 val = gnutls_certificate_set_x509_key_file (p_sys->x509_cred,
1089 psz_local_cert, psz_local_key,
1090 GNUTLS_X509_FMT_PEM );
1091 LocaleFree (psz_local_key);
1092 free (psz_key_path);
1093 LocaleFree (psz_local_cert);
1094 free (psz_cert_path);
1098 msg_Err( p_server, "cannot set certificate chain or private key: %s",
1099 gnutls_strerror( val ) );
1100 gnutls_certificate_free_credentials( p_sys->x509_cred );
1105 * - support other ciper suites
1107 val = gnutls_dh_params_init (&p_sys->dh_params);
1110 const gnutls_datum_t data = {
1111 .data = (unsigned char *)dh_params,
1112 .size = sizeof (dh_params) - 1,
1115 val = gnutls_dh_params_import_pkcs3 (p_sys->dh_params, &data,
1116 GNUTLS_X509_FMT_PEM);
1118 gnutls_certificate_set_dh_params (p_sys->x509_cred,
1123 msg_Err (p_server, "cannot initialize DHE cipher suites: %s",
1124 gnutls_strerror (val));
1130 vlc_mutex_destroy (&p_sys->cache_lock);
1131 free (p_sys->p_cache);
1133 return VLC_EGENERIC;
1137 * Destroys a TLS server object.
1139 static void CloseServer (vlc_object_t *p_server)
1141 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
1143 vlc_mutex_destroy (&p_sys->cache_lock);
1144 free (p_sys->p_cache);
1146 /* all sessions depending on the server are now deinitialized */
1147 gnutls_certificate_free_credentials (p_sys->x509_cred);
1148 gnutls_dh_params_deinit (p_sys->dh_params);
1151 gnutls_Deinit (p_server);