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>
39 #ifdef HAVE_SYS_STAT_H
40 # include <sys/stat.h>
51 #include <vlc_charset.h>
53 #include <vlc_block.h>
56 #include <gnutls/gnutls.h>
57 #include <gnutls/x509.h>
59 #include <vlc_gcrypt.h>
61 #define CACHE_TIMEOUT 3600
68 /*****************************************************************************
70 *****************************************************************************/
71 static int OpenClient (vlc_object_t *);
72 static void CloseClient (vlc_object_t *);
73 static int OpenServer (vlc_object_t *);
74 static void CloseServer (vlc_object_t *);
76 #define CACHE_TIMEOUT_TEXT N_("Expiration time for resumed TLS sessions")
77 #define CACHE_TIMEOUT_LONGTEXT N_( \
78 "It is possible to cache the resumed TLS sessions. This is the expiration "\
79 "time of the sessions stored in this cache, in seconds." )
81 #define CACHE_SIZE_TEXT N_("Number of resumed TLS sessions")
82 #define CACHE_SIZE_LONGTEXT N_( \
83 "This is the maximum number of resumed TLS sessions that " \
84 "the cache will hold." )
87 set_shortname( "GnuTLS" )
88 set_description( N_("GnuTLS transport layer security") )
89 set_capability( "tls client", 1 )
90 set_callbacks( OpenClient, CloseClient )
91 set_category( CAT_ADVANCED )
92 set_subcategory( SUBCAT_ADVANCED_MISC )
94 add_obsolete_bool( "tls-check-cert" )
95 add_obsolete_bool( "tls-check-hostname" )
98 set_description( N_("GnuTLS server") )
99 set_capability( "tls server", 1 )
100 set_category( CAT_ADVANCED )
101 set_subcategory( SUBCAT_ADVANCED_MISC )
102 set_callbacks( OpenServer, CloseServer )
104 add_obsolete_integer( "gnutls-dh-bits" )
105 add_integer( "gnutls-cache-timeout", CACHE_TIMEOUT, NULL,
106 CACHE_TIMEOUT_TEXT, CACHE_TIMEOUT_LONGTEXT, true )
107 add_integer( "gnutls-cache-size", CACHE_SIZE, NULL, CACHE_SIZE_TEXT,
108 CACHE_SIZE_LONGTEXT, true )
111 static vlc_mutex_t gnutls_mutex = VLC_STATIC_MUTEX;
114 * Initializes GnuTLS with proper locking.
115 * @return VLC_SUCCESS on success, a VLC error code otherwise.
117 static int gnutls_Init (vlc_object_t *p_this)
119 int ret = VLC_EGENERIC;
121 vlc_gcrypt_init (); /* GnuTLS depends on gcrypt */
123 vlc_mutex_lock (&gnutls_mutex);
124 if (gnutls_global_init ())
126 msg_Err (p_this, "cannot initialize GnuTLS");
130 const char *psz_version = gnutls_check_version ("1.3.3");
131 if (psz_version == NULL)
133 msg_Err (p_this, "unsupported GnuTLS version");
134 gnutls_global_deinit ();
138 msg_Dbg (p_this, "GnuTLS v%s initialized", psz_version);
142 vlc_mutex_unlock (&gnutls_mutex);
148 * Deinitializes GnuTLS.
150 static void gnutls_Deinit (vlc_object_t *p_this)
152 vlc_mutex_lock (&gnutls_mutex);
154 gnutls_global_deinit ();
155 msg_Dbg (p_this, "GnuTLS deinitialized");
156 vlc_mutex_unlock (&gnutls_mutex);
160 static int gnutls_Error (vlc_object_t *obj, int val)
166 WSASetLastError (WSAEWOULDBLOCK);
172 case GNUTLS_E_INTERRUPTED:
174 WSASetLastError (WSAEINTR);
181 msg_Err (obj, "%s", gnutls_strerror (val));
183 if (!gnutls_error_is_fatal (val))
184 msg_Err (obj, "Error above should be handled");
187 WSASetLastError (WSAECONNRESET);
196 struct tls_session_sys_t
198 gnutls_session_t session;
205 * Sends data through a TLS session.
208 gnutls_Send( void *p_session, const void *buf, int i_length )
211 tls_session_sys_t *p_sys;
213 p_sys = (tls_session_sys_t *)(((tls_session_t *)p_session)->p_sys);
215 val = gnutls_record_send( p_sys->session, buf, i_length );
216 return (val < 0) ? gnutls_Error ((vlc_object_t *)p_session, val) : val;
221 * Receives data through a TLS session.
224 gnutls_Recv( void *p_session, void *buf, int i_length )
227 tls_session_sys_t *p_sys;
229 p_sys = (tls_session_sys_t *)(((tls_session_t *)p_session)->p_sys);
231 val = gnutls_record_recv( p_sys->session, buf, i_length );
232 return (val < 0) ? gnutls_Error ((vlc_object_t *)p_session, val) : val;
237 * Starts or continues the TLS handshake.
239 * @return -1 on fatal error, 0 on successful handshake completion,
240 * 1 if more would-be blocking recv is needed,
241 * 2 if more would-be blocking send is required.
244 gnutls_ContinueHandshake (tls_session_t *p_session)
246 tls_session_sys_t *p_sys = p_session->p_sys;
250 WSASetLastError( 0 );
252 val = gnutls_handshake( p_sys->session );
253 if( ( val == GNUTLS_E_AGAIN ) || ( val == GNUTLS_E_INTERRUPTED ) )
254 return 1 + gnutls_record_get_direction( p_sys->session );
259 msg_Dbg( p_session, "Winsock error %d", WSAGetLastError( ) );
261 msg_Err( p_session, "TLS handshake error: %s",
262 gnutls_strerror( val ) );
266 p_sys->b_handshaked = true;
277 static const error_msg_t cert_errors[] =
279 { GNUTLS_CERT_INVALID,
280 "Certificate could not be verified" },
281 { GNUTLS_CERT_REVOKED,
282 "Certificate was revoked" },
283 { GNUTLS_CERT_SIGNER_NOT_FOUND,
284 "Certificate's signer was not found" },
285 { GNUTLS_CERT_SIGNER_NOT_CA,
286 "Certificate's signer is not a CA" },
287 { GNUTLS_CERT_INSECURE_ALGORITHM,
288 "Insecure certificate signature algorithm" },
294 gnutls_HandshakeAndValidate( tls_session_t *session )
296 int val = gnutls_ContinueHandshake( session );
300 tls_session_sys_t *p_sys = (tls_session_sys_t *)(session->p_sys);
302 /* certificates chain verification */
304 val = gnutls_certificate_verify_peers2( p_sys->session, &status );
308 msg_Err( session, "Certificate verification failed: %s",
309 gnutls_strerror( val ) );
315 msg_Err( session, "TLS session: access denied" );
316 for( const error_msg_t *e = cert_errors; e->flag; e++ )
318 if( status & e->flag )
320 msg_Err( session, "%s", e->msg );
327 "unknown certificate error (you found a bug in VLC)" );
332 /* certificate (host)name verification */
333 const gnutls_datum_t *data;
334 data = gnutls_certificate_get_peers (p_sys->session, &(unsigned){0});
337 msg_Err( session, "Peer certificate not available" );
341 gnutls_x509_crt_t cert;
342 val = gnutls_x509_crt_init( &cert );
345 msg_Err( session, "x509 fatal error: %s", gnutls_strerror( val ) );
349 val = gnutls_x509_crt_import( cert, data, GNUTLS_X509_FMT_DER );
352 msg_Err( session, "Certificate import error: %s",
353 gnutls_strerror( val ) );
357 assert( p_sys->psz_hostname != NULL );
358 if ( !gnutls_x509_crt_check_hostname( cert, p_sys->psz_hostname ) )
360 msg_Err( session, "Certificate does not match \"%s\"",
361 p_sys->psz_hostname );
365 if( gnutls_x509_crt_get_expiration_time( cert ) < time( NULL ) )
367 msg_Err( session, "Certificate expired" );
371 if( gnutls_x509_crt_get_activation_time( cert ) > time ( NULL ) )
373 msg_Err( session, "Certificate not yet valid" );
377 gnutls_x509_crt_deinit( cert );
378 msg_Dbg( session, "TLS/x509 certificate verified" );
382 gnutls_x509_crt_deinit( cert );
387 * Sets the operating system file descriptor backend for the TLS sesison.
389 * @param fd stream socket already connected with the peer.
392 gnutls_SetFD (tls_session_t *p_session, int fd)
394 gnutls_transport_set_ptr (p_session->p_sys->session,
395 (gnutls_transport_ptr_t)(intptr_t)fd);
398 typedef int (*tls_prio_func) (gnutls_session_t, const int *);
401 gnutls_SetPriority (vlc_object_t *restrict obj, const char *restrict name,
402 tls_prio_func func, gnutls_session_t session,
403 const int *restrict values)
405 int val = func (session, values);
408 msg_Err (obj, "cannot set %s priorities: %s", name,
409 gnutls_strerror (val));
417 gnutls_SessionPrioritize (vlc_object_t *obj, gnutls_session_t session)
419 /* Note that ordering matters (on the client side) */
420 static const int protos[] =
422 /*GNUTLS_TLS1_2, as of GnuTLS 2.6.5, still not ratified */
428 static const int comps[] =
434 static const int macs[] =
440 GNUTLS_MAC_RMD160, // RIPEMD
446 static const int ciphers[] =
448 GNUTLS_CIPHER_AES_256_CBC,
449 GNUTLS_CIPHER_AES_128_CBC,
450 GNUTLS_CIPHER_3DES_CBC,
451 GNUTLS_CIPHER_ARCFOUR_128,
452 // TODO? Camellia ciphers?
453 //GNUTLS_CIPHER_DES_CBC,
454 //GNUTLS_CIPHER_ARCFOUR_40,
455 //GNUTLS_CIPHER_RC2_40_CBC,
456 //GNUTLS_CIPHER_NULL,
459 static const int kx[] =
464 //GNUTLS_KX_RSA_EXPORT,
465 //GNUTLS_KX_DHE_PSK, TODO
466 //GNUTLS_KX_PSK, TODO
467 //GNUTLS_KX_SRP_RSA, TODO
468 //GNUTLS_KX_SRP_DSS, TODO
469 //GNUTLS_KX_SRP, TODO
473 static const int cert_types[] =
476 //GNUTLS_CRT_OPENPGP, TODO
480 int val = gnutls_set_default_priority (session);
483 msg_Err (obj, "cannot set default TLS priorities: %s",
484 gnutls_strerror (val));
488 if (gnutls_SetPriority (obj, "protocols",
489 gnutls_protocol_set_priority, session, protos)
490 || gnutls_SetPriority (obj, "compression algorithms",
491 gnutls_compression_set_priority, session, comps)
492 || gnutls_SetPriority (obj, "MAC algorithms",
493 gnutls_mac_set_priority, session, macs)
494 || gnutls_SetPriority (obj, "ciphers",
495 gnutls_cipher_set_priority, session, ciphers)
496 || gnutls_SetPriority (obj, "key exchange algorithms",
497 gnutls_kx_set_priority, session, kx)
498 || gnutls_SetPriority (obj, "certificate types",
499 gnutls_certificate_type_set_priority, session,
508 gnutls_Addx509File( vlc_object_t *p_this,
509 gnutls_certificate_credentials_t cred,
510 const char *psz_path, bool b_priv );
513 gnutls_Addx509Directory( vlc_object_t *p_this,
514 gnutls_certificate_credentials_t cred,
515 const char *psz_dirname,
520 if( *psz_dirname == '\0' )
523 dir = vlc_opendir( psz_dirname );
528 msg_Err (p_this, "cannot open directory (%s): %m", psz_dirname);
532 msg_Dbg (p_this, "creating empty certificate directory: %s",
534 vlc_mkdir (psz_dirname, b_priv ? 0700 : 0755);
540 struct stat st1, st2;
541 int fd = dirfd( dir );
544 * Gets stats for the directory path, checks that it is not a
545 * symbolic link (to avoid possibly infinite recursion), and verifies
546 * that the inode is still the same, to avoid TOCTOU race condition.
549 || fstat( fd, &st1 ) || vlc_lstat( psz_dirname, &st2 )
550 || S_ISLNK( st2.st_mode ) || ( st1.st_ino != st2.st_ino ) )
560 char *ent = vlc_readdir (dir);
564 if ((strcmp (ent, ".") == 0) || (strcmp (ent, "..") == 0))
570 char path[strlen (psz_dirname) + strlen (ent) + 2];
571 sprintf (path, "%s"DIR_SEP"%s", psz_dirname, ent);
574 gnutls_Addx509File( p_this, cred, path, b_priv );
583 gnutls_Addx509File( vlc_object_t *p_this,
584 gnutls_certificate_credentials cred,
585 const char *psz_path, bool b_priv )
589 int fd = vlc_open (psz_path, O_RDONLY);
593 block_t *block = block_File (fd);
598 gnutls_datum data = {
599 .data = block->p_buffer,
600 .size = block->i_buffer,
603 ? gnutls_certificate_set_x509_key_mem (cred, &data, &data,
605 : gnutls_certificate_set_x509_trust_mem (cred, &data,
606 GNUTLS_X509_FMT_PEM);
607 block_Release (block);
611 msg_Warn (p_this, "cannot add x509 credentials (%s): %s",
612 psz_path, gnutls_strerror (res));
615 msg_Dbg (p_this, "added x509 credentials (%s)", psz_path);
619 if (!fstat (fd, &st) && S_ISDIR (st.st_mode))
622 msg_Dbg (p_this, "looking recursively for x509 credentials in %s",
624 return gnutls_Addx509Directory (p_this, cred, psz_path, b_priv);
628 msg_Warn (p_this, "cannot add x509 credentials (%s): %m", psz_path);
635 /** TLS client session data */
636 typedef struct tls_client_sys_t
638 struct tls_session_sys_t session;
639 gnutls_certificate_credentials_t x509_cred;
644 * Initializes a client-side TLS session.
646 static int OpenClient (vlc_object_t *obj)
648 tls_session_t *p_session = (tls_session_t *)obj;
651 if (gnutls_Init (obj))
654 tls_client_sys_t *p_sys = malloc (sizeof (*p_sys));
661 p_session->p_sys = &p_sys->session;
662 p_session->sock.p_sys = p_session;
663 p_session->sock.pf_send = gnutls_Send;
664 p_session->sock.pf_recv = gnutls_Recv;
665 p_session->pf_set_fd = gnutls_SetFD;
667 p_sys->session.b_handshaked = false;
669 i_val = gnutls_certificate_allocate_credentials (&p_sys->x509_cred);
672 msg_Err (obj, "cannot allocate X509 credentials: %s",
673 gnutls_strerror (i_val));
677 char *userdir = config_GetUserDir ( VLC_DATA_DIR );
680 char path[strlen (userdir) + sizeof ("/ssl/private")];
681 sprintf (path, "%s/ssl", userdir);
682 vlc_mkdir (path, 0755);
684 sprintf (path, "%s/ssl/certs", userdir);
685 gnutls_Addx509Directory (VLC_OBJECT (p_session),
686 p_sys->x509_cred, path, false);
687 sprintf (path, "%s/ssl/private", userdir);
688 gnutls_Addx509Directory (VLC_OBJECT (p_session), p_sys->x509_cred,
693 const char *confdir = config_GetConfDir ();
695 char path[strlen (confdir)
696 + sizeof ("/ssl/certs/ca-certificates.crt")];
697 sprintf (path, "%s/ssl/certs/ca-certificates.crt", confdir);
698 gnutls_Addx509File (VLC_OBJECT (p_session),
699 p_sys->x509_cred, path, false);
701 p_session->pf_handshake = gnutls_HandshakeAndValidate;
702 /*p_session->pf_handshake = gnutls_ContinueHandshake;*/
704 i_val = gnutls_init (&p_sys->session.session, GNUTLS_CLIENT);
707 msg_Err (obj, "cannot initialize TLS session: %s",
708 gnutls_strerror (i_val));
709 gnutls_certificate_free_credentials (p_sys->x509_cred);
713 if (gnutls_SessionPrioritize (VLC_OBJECT (p_session),
714 p_sys->session.session))
717 /* minimum DH prime bits */
718 gnutls_dh_set_prime_bits (p_sys->session.session, 1024);
720 i_val = gnutls_credentials_set (p_sys->session.session,
721 GNUTLS_CRD_CERTIFICATE,
725 msg_Err (obj, "cannot set TLS session credentials: %s",
726 gnutls_strerror (i_val));
730 char *servername = var_GetNonEmptyString (p_session, "tls-server-name");
731 if (servername == NULL )
732 msg_Err (p_session, "server name missing for TLS session");
734 gnutls_server_name_set (p_sys->session.session, GNUTLS_NAME_DNS,
735 servername, strlen (servername));
737 p_sys->session.psz_hostname = servername;
742 gnutls_deinit (p_sys->session.session);
743 gnutls_certificate_free_credentials (p_sys->x509_cred);
751 static void CloseClient (vlc_object_t *obj)
753 tls_session_t *client = (tls_session_t *)obj;
754 tls_client_sys_t *p_sys = (tls_client_sys_t *)(client->p_sys);
756 if (p_sys->session.b_handshaked == true)
757 gnutls_bye (p_sys->session.session, GNUTLS_SHUT_WR);
758 gnutls_deinit (p_sys->session.session);
759 /* credentials must be free'd *after* gnutls_deinit() */
760 gnutls_certificate_free_credentials (p_sys->x509_cred);
763 free (p_sys->session.psz_hostname);
771 struct tls_server_sys_t
773 gnutls_certificate_credentials_t x509_cred;
774 gnutls_dh_params_t dh_params;
776 struct saved_session_t *p_cache;
777 struct saved_session_t *p_store;
779 vlc_mutex_t cache_lock;
781 int (*pf_handshake) (tls_session_t *);
786 * TLS session resumption callbacks (server-side)
788 #define MAX_SESSION_ID 32
789 #define MAX_SESSION_DATA 1024
791 typedef struct saved_session_t
793 char id[MAX_SESSION_ID];
794 char data[MAX_SESSION_DATA];
801 static int cb_store( void *p_server, gnutls_datum key, gnutls_datum data )
803 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
805 if( ( p_sys->i_cache_size == 0 )
806 || ( key.size > MAX_SESSION_ID )
807 || ( data.size > MAX_SESSION_DATA ) )
810 vlc_mutex_lock( &p_sys->cache_lock );
812 memcpy( p_sys->p_store->id, key.data, key.size);
813 memcpy( p_sys->p_store->data, data.data, data.size );
814 p_sys->p_store->i_idlen = key.size;
815 p_sys->p_store->i_datalen = data.size;
818 if( ( p_sys->p_store - p_sys->p_cache ) == p_sys->i_cache_size )
819 p_sys->p_store = p_sys->p_cache;
821 vlc_mutex_unlock( &p_sys->cache_lock );
827 static gnutls_datum cb_fetch( void *p_server, gnutls_datum key )
829 static const gnutls_datum_t err_datum = { NULL, 0 };
830 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
831 saved_session_t *p_session, *p_end;
833 p_session = p_sys->p_cache;
834 p_end = p_session + p_sys->i_cache_size;
836 vlc_mutex_lock( &p_sys->cache_lock );
838 while( p_session < p_end )
840 if( ( p_session->i_idlen == key.size )
841 && !memcmp( p_session->id, key.data, key.size ) )
845 data.size = p_session->i_datalen;
847 data.data = gnutls_malloc( data.size );
848 if( data.data == NULL )
850 vlc_mutex_unlock( &p_sys->cache_lock );
854 memcpy( data.data, p_session->data, data.size );
855 vlc_mutex_unlock( &p_sys->cache_lock );
861 vlc_mutex_unlock( &p_sys->cache_lock );
867 static int cb_delete( void *p_server, gnutls_datum key )
869 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
870 saved_session_t *p_session, *p_end;
872 p_session = p_sys->p_cache;
873 p_end = p_session + p_sys->i_cache_size;
875 vlc_mutex_lock( &p_sys->cache_lock );
877 while( p_session < p_end )
879 if( ( p_session->i_idlen == key.size )
880 && !memcmp( p_session->id, key.data, key.size ) )
882 p_session->i_datalen = p_session->i_idlen = 0;
883 vlc_mutex_unlock( &p_sys->cache_lock );
889 vlc_mutex_unlock( &p_sys->cache_lock );
896 * Terminates TLS session and releases session data.
897 * You still have to close the socket yourself.
900 gnutls_SessionClose (tls_server_t *p_server, tls_session_t *p_session)
902 tls_session_sys_t *p_sys = p_session->p_sys;
905 if( p_sys->b_handshaked == true )
906 gnutls_bye( p_sys->session, GNUTLS_SHUT_WR );
907 gnutls_deinit( p_sys->session );
909 vlc_object_release( p_session );
916 * Initializes a server-side TLS session.
918 static tls_session_t *
919 gnutls_ServerSessionPrepare( tls_server_t *p_server )
921 tls_session_t *p_session;
922 tls_server_sys_t *p_server_sys;
923 gnutls_session_t session;
926 p_session = vlc_object_create( p_server, sizeof (struct tls_session_t) );
927 if( p_session == NULL )
930 p_session->p_sys = malloc( sizeof(struct tls_session_sys_t) );
931 if( p_session->p_sys == NULL )
933 vlc_object_release( p_session );
937 p_server_sys = p_server->p_sys;
938 p_session->sock.p_sys = p_session;
939 p_session->sock.pf_send = gnutls_Send;
940 p_session->sock.pf_recv = gnutls_Recv;
941 p_session->pf_set_fd = gnutls_SetFD;
942 p_session->pf_handshake = p_server_sys->pf_handshake;
944 p_session->p_sys->b_handshaked = false;
945 p_session->p_sys->psz_hostname = NULL;
947 i_val = gnutls_init( &session, GNUTLS_SERVER );
950 msg_Err( p_server, "cannot initialize TLS session: %s",
951 gnutls_strerror( i_val ) );
955 p_session->p_sys->session = session;
957 if (gnutls_SessionPrioritize (VLC_OBJECT (p_session), session))
959 gnutls_deinit( session );
963 i_val = gnutls_credentials_set( session, GNUTLS_CRD_CERTIFICATE,
964 p_server_sys->x509_cred );
967 msg_Err( p_server, "cannot set TLS session credentials: %s",
968 gnutls_strerror( i_val ) );
969 gnutls_deinit( session );
973 if (p_session->pf_handshake == gnutls_HandshakeAndValidate)
974 gnutls_certificate_server_set_request (session, GNUTLS_CERT_REQUIRE);
976 /* Session resumption support */
977 i_val = var_InheritInteger (p_server, "gnutls-cache-timeout");
979 gnutls_db_set_cache_expiration (session, i_val);
980 gnutls_db_set_retrieve_function( session, cb_fetch );
981 gnutls_db_set_remove_function( session, cb_delete );
982 gnutls_db_set_store_function( session, cb_store );
983 gnutls_db_set_ptr( session, p_server );
988 free( p_session->p_sys );
989 vlc_object_release( p_session );
995 * Adds one or more certificate authorities.
997 * @param psz_ca_path (Unicode) path to an x509 certificates list.
999 * @return -1 on error, 0 on success.
1002 gnutls_ServerAddCA( tls_server_t *p_server, const char *psz_ca_path )
1004 tls_server_sys_t *p_sys;
1005 char *psz_local_path;
1008 p_sys = (tls_server_sys_t *)(p_server->p_sys);
1010 psz_local_path = ToLocale( psz_ca_path );
1011 val = gnutls_certificate_set_x509_trust_file( p_sys->x509_cred,
1013 GNUTLS_X509_FMT_PEM );
1014 LocaleFree( psz_local_path );
1017 msg_Err( p_server, "cannot add trusted CA (%s): %s", psz_ca_path,
1018 gnutls_strerror( val ) );
1019 return VLC_EGENERIC;
1021 msg_Dbg( p_server, " %d trusted CA added (%s)", val, psz_ca_path );
1023 /* enables peer's certificate verification */
1024 p_sys->pf_handshake = gnutls_HandshakeAndValidate;
1031 * Adds a certificates revocation list to be sent to TLS clients.
1033 * @param psz_crl_path (Unicode) path of the CRL file.
1035 * @return -1 on error, 0 on success.
1038 gnutls_ServerAddCRL( tls_server_t *p_server, const char *psz_crl_path )
1041 char *psz_local_path = ToLocale( psz_crl_path );
1043 val = gnutls_certificate_set_x509_crl_file( ((tls_server_sys_t *)
1044 (p_server->p_sys))->x509_cred,
1046 GNUTLS_X509_FMT_PEM );
1047 LocaleFree( psz_crl_path );
1050 msg_Err( p_server, "cannot add CRL (%s): %s", psz_crl_path,
1051 gnutls_strerror( val ) );
1052 return VLC_EGENERIC;
1054 msg_Dbg( p_server, "%d CRL added (%s)", val, psz_crl_path );
1060 * Allocates a whole server's TLS credentials.
1062 static int OpenServer (vlc_object_t *obj)
1064 tls_server_t *p_server = (tls_server_t *)obj;
1065 tls_server_sys_t *p_sys;
1068 if (gnutls_Init (obj))
1069 return VLC_EGENERIC;
1071 msg_Dbg (obj, "creating TLS server");
1073 p_sys = (tls_server_sys_t *)malloc( sizeof(struct tls_server_sys_t) );
1077 p_sys->i_cache_size = var_InheritInteger (obj, "gnutls-cache-size");
1078 if (p_sys->i_cache_size == -1) /* Duh, config subsystem exploded?! */
1079 p_sys->i_cache_size = 0;
1080 p_sys->p_cache = calloc (p_sys->i_cache_size,
1081 sizeof (struct saved_session_t));
1082 if (p_sys->p_cache == NULL)
1088 p_sys->p_store = p_sys->p_cache;
1089 p_server->p_sys = p_sys;
1090 p_server->pf_add_CA = gnutls_ServerAddCA;
1091 p_server->pf_add_CRL = gnutls_ServerAddCRL;
1092 p_server->pf_open = gnutls_ServerSessionPrepare;
1093 p_server->pf_close = gnutls_SessionClose;
1095 /* No certificate validation by default */
1096 p_sys->pf_handshake = gnutls_ContinueHandshake;
1098 vlc_mutex_init( &p_sys->cache_lock );
1100 /* Sets server's credentials */
1101 val = gnutls_certificate_allocate_credentials( &p_sys->x509_cred );
1104 msg_Err( p_server, "cannot allocate X509 credentials: %s",
1105 gnutls_strerror( val ) );
1109 char *psz_cert_path = var_GetNonEmptyString (obj, "tls-x509-cert");
1110 char *psz_key_path = var_GetNonEmptyString (obj, "tls-x509-key");
1111 const char *psz_local_cert = ToLocale (psz_cert_path);
1112 const char *psz_local_key = ToLocale (psz_key_path);
1113 val = gnutls_certificate_set_x509_key_file (p_sys->x509_cred,
1114 psz_local_cert, psz_local_key,
1115 GNUTLS_X509_FMT_PEM );
1116 LocaleFree (psz_local_key);
1117 free (psz_key_path);
1118 LocaleFree (psz_local_cert);
1119 free (psz_cert_path);
1123 msg_Err( p_server, "cannot set certificate chain or private key: %s",
1124 gnutls_strerror( val ) );
1125 gnutls_certificate_free_credentials( p_sys->x509_cred );
1130 * - support other ciper suites
1132 val = gnutls_dh_params_init (&p_sys->dh_params);
1135 const gnutls_datum_t data = {
1136 .data = (unsigned char *)dh_params,
1137 .size = sizeof (dh_params) - 1,
1140 val = gnutls_dh_params_import_pkcs3 (p_sys->dh_params, &data,
1141 GNUTLS_X509_FMT_PEM);
1143 gnutls_certificate_set_dh_params (p_sys->x509_cred,
1148 msg_Err (p_server, "cannot initialize DHE cipher suites: %s",
1149 gnutls_strerror (val));
1155 vlc_mutex_destroy (&p_sys->cache_lock);
1156 free (p_sys->p_cache);
1158 return VLC_EGENERIC;
1162 * Destroys a TLS server object.
1164 static void CloseServer (vlc_object_t *p_server)
1166 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
1168 vlc_mutex_destroy (&p_sys->cache_lock);
1169 free (p_sys->p_cache);
1171 /* all sessions depending on the server are now deinitialized */
1172 gnutls_certificate_free_credentials (p_sys->x509_cred);
1173 gnutls_dh_params_deinit (p_sys->dh_params);
1176 gnutls_Deinit (p_server);