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 *****************************************************************************/
36 #include <sys/types.h>
41 #ifdef HAVE_SYS_STAT_H
42 # include <sys/stat.h>
50 #include <vlc_charset.h>
53 #include <gnutls/gnutls.h>
54 #include <gnutls/x509.h>
56 #define CACHE_TIMEOUT 3600
61 /*****************************************************************************
63 *****************************************************************************/
64 static int OpenClient (vlc_object_t *);
65 static void CloseClient (vlc_object_t *);
66 static int OpenServer (vlc_object_t *);
67 static void CloseServer (vlc_object_t *);
69 #define CACHE_TIMEOUT_TEXT N_("Expiration time for resumed TLS sessions")
70 #define CACHE_TIMEOUT_LONGTEXT N_( \
71 "It is possible to cache the resumed TLS sessions. This is the expiration "\
72 "time of the sessions stored in this cache, in seconds." )
74 #define CACHE_SIZE_TEXT N_("Number of resumed TLS sessions")
75 #define CACHE_SIZE_LONGTEXT N_( \
76 "This is the maximum number of resumed TLS sessions that " \
77 "the cache will hold." )
80 set_shortname( "GnuTLS" );
81 set_description( _("GnuTLS transport layer security") );
82 set_capability( "tls client", 1 );
83 set_callbacks( OpenClient, CloseClient );
84 set_category( CAT_ADVANCED );
85 set_subcategory( SUBCAT_ADVANCED_MISC );
87 add_obsolete_bool( "tls-check-cert" );
88 add_obsolete_bool( "tls-check-hostname" );
91 set_description( _("GnuTLS server") );
92 set_capability( "tls server", 1 );
93 set_category( CAT_ADVANCED );
94 set_subcategory( SUBCAT_ADVANCED_MISC );
95 set_callbacks( OpenServer, CloseServer );
97 add_obsolete_integer( "gnutls-dh-bits" );
98 add_integer( "gnutls-cache-timeout", CACHE_TIMEOUT, NULL,
99 CACHE_TIMEOUT_TEXT, CACHE_TIMEOUT_LONGTEXT, VLC_TRUE );
100 add_integer( "gnutls-cache-size", CACHE_SIZE, NULL, CACHE_SIZE_TEXT,
101 CACHE_SIZE_LONGTEXT, VLC_TRUE );
106 #ifdef LIBVLC_USE_PTHREAD
107 GCRY_THREAD_OPTION_PTHREAD_IMPL;
108 # define gcry_threads_vlc gcry_threads_pthread
111 * gcrypt thread option VLC implementation
114 static int gcry_vlc_mutex_init( void **p_sys )
117 vlc_mutex_t *p_lock = (vlc_mutex_t *)malloc( sizeof( vlc_mutex_t ) );
122 i_val = vlc_mutex_init( (vlc_object_t *)NULL, p_lock );
130 static int gcry_vlc_mutex_destroy( void **p_sys )
133 vlc_mutex_t *p_lock = (vlc_mutex_t *)*p_sys;
135 i_val = vlc_mutex_destroy( p_lock );
140 static int gcry_vlc_mutex_lock( void **p_sys )
142 return vlc_mutex_lock( (vlc_mutex_t *)*p_sys );
145 static int gcry_vlc_mutex_unlock( void **lock )
147 return vlc_mutex_unlock( (vlc_mutex_t *)*lock );
150 static struct gcry_thread_cbs gcry_threads_vlc =
152 GCRY_THREAD_OPTION_USER,
155 gcry_vlc_mutex_destroy,
157 gcry_vlc_mutex_unlock
163 * Initializes GnuTLS with proper locking.
164 * @return VLC_SUCCESS on success, a VLC error code otherwise.
166 static int gnutls_Init (vlc_object_t *p_this)
168 int ret = VLC_EGENERIC;
170 vlc_mutex_t *lock = var_AcquireMutex ("gnutls_mutex");
172 gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_vlc);
173 if (gnutls_global_init ())
175 msg_Err (p_this, "cannot initialize GnuTLS");
179 const char *psz_version = gnutls_check_version ("1.3.3");
180 if (psz_version == NULL)
182 msg_Err (p_this, "unsupported GnuTLS version");
183 gnutls_global_deinit ();
187 msg_Dbg (p_this, "GnuTLS v%s initialized", psz_version);
191 vlc_mutex_unlock (lock);
197 * Deinitializes GnuTLS.
199 static void gnutls_Deinit (vlc_object_t *p_this)
201 vlc_mutex_t *lock = var_AcquireMutex( "gnutls_mutex" );
203 gnutls_global_deinit ();
204 msg_Dbg (p_this, "GnuTLS deinitialized");
205 vlc_mutex_unlock (lock);
209 static int gnutls_Error (vlc_object_t *obj, int val)
218 /* WinSock does not return EAGAIN, return EINTR instead */
220 case GNUTLS_E_INTERRUPTED:
222 WSASetLastError (WSAEINTR);
229 msg_Err (obj, "%s", gnutls_strerror (val));
231 if (!gnutls_error_is_fatal (val))
232 msg_Err (obj, "Error above should be handled");
235 WSASetLastError (WSAECONNRESET);
244 struct tls_session_sys_t
246 gnutls_session_t session;
248 vlc_bool_t b_handshaked;
253 * Sends data through a TLS session.
256 gnutls_Send( void *p_session, const void *buf, int i_length )
259 tls_session_sys_t *p_sys;
261 p_sys = (tls_session_sys_t *)(((tls_session_t *)p_session)->p_sys);
263 val = gnutls_record_send( p_sys->session, buf, i_length );
264 return (val < 0) ? gnutls_Error ((vlc_object_t *)p_session, val) : val;
269 * Receives data through a TLS session.
272 gnutls_Recv( void *p_session, void *buf, int i_length )
275 tls_session_sys_t *p_sys;
277 p_sys = (tls_session_sys_t *)(((tls_session_t *)p_session)->p_sys);
279 val = gnutls_record_recv( p_sys->session, buf, i_length );
280 return (val < 0) ? gnutls_Error ((vlc_object_t *)p_session, val) : val;
285 * Starts or continues the TLS handshake.
287 * @return -1 on fatal error, 0 on succesful handshake completion,
288 * 1 if more would-be blocking recv is needed,
289 * 2 if more would-be blocking send is required.
292 gnutls_ContinueHandshake (tls_session_t *p_session)
294 tls_session_sys_t *p_sys = p_session->p_sys;
298 WSASetLastError( 0 );
300 val = gnutls_handshake( p_sys->session );
301 if( ( val == GNUTLS_E_AGAIN ) || ( val == GNUTLS_E_INTERRUPTED ) )
302 return 1 + gnutls_record_get_direction( p_sys->session );
307 msg_Dbg( p_session, "Winsock error %d", WSAGetLastError( ) );
309 msg_Err( p_session, "TLS handshake error: %s",
310 gnutls_strerror( val ) );
314 p_sys->b_handshaked = VLC_TRUE;
325 static const error_msg_t cert_errors[] =
327 { GNUTLS_CERT_INVALID,
328 "Certificate could not be verified" },
329 { GNUTLS_CERT_REVOKED,
330 "Certificate was revoked" },
331 { GNUTLS_CERT_SIGNER_NOT_FOUND,
332 "Certificate's signer was not found" },
333 { GNUTLS_CERT_SIGNER_NOT_CA,
334 "Certificate's signer is not a CA" },
335 { GNUTLS_CERT_INSECURE_ALGORITHM,
336 "Insecure certificate signature algorithm" },
342 gnutls_HandshakeAndValidate( tls_session_t *session )
344 int val = gnutls_ContinueHandshake( session );
348 tls_session_sys_t *p_sys = (tls_session_sys_t *)(session->p_sys);
350 /* certificates chain verification */
352 val = gnutls_certificate_verify_peers2( p_sys->session, &status );
356 msg_Err( session, "Certificate verification failed: %s",
357 gnutls_strerror( val ) );
363 msg_Err( session, "TLS session: access denied" );
364 for( const error_msg_t *e = cert_errors; e->flag; e++ )
366 if( status & e->flag )
368 msg_Err( session, "%s", e->msg );
375 "unknown certificate error (you found a bug in VLC)" );
380 /* certificate (host)name verification */
381 const gnutls_datum_t *data;
382 data = gnutls_certificate_get_peers (p_sys->session, &(unsigned){0});
385 msg_Err( session, "Peer certificate not available" );
389 gnutls_x509_crt_t cert;
390 val = gnutls_x509_crt_init( &cert );
393 msg_Err( session, "x509 fatal error: %s", gnutls_strerror( val ) );
397 val = gnutls_x509_crt_import( cert, data, GNUTLS_X509_FMT_DER );
400 msg_Err( session, "Certificate import error: %s",
401 gnutls_strerror( val ) );
405 assert( p_sys->psz_hostname != NULL );
406 if ( !gnutls_x509_crt_check_hostname( cert, p_sys->psz_hostname ) )
408 msg_Err( session, "Certificate does not match \"%s\"",
409 p_sys->psz_hostname );
413 if( gnutls_x509_crt_get_expiration_time( cert ) < time( NULL ) )
415 msg_Err( session, "Certificate expired" );
419 if( gnutls_x509_crt_get_activation_time( cert ) > time ( NULL ) )
421 msg_Err( session, "Certificate not yet valid" );
425 gnutls_x509_crt_deinit( cert );
426 msg_Dbg( session, "TLS/x509 certificate verified" );
430 gnutls_x509_crt_deinit( cert );
435 * Sets the operating system file descriptor backend for the TLS sesison.
437 * @param fd stream socket already connected with the peer.
440 gnutls_SetFD (tls_session_t *p_session, int fd)
442 gnutls_transport_set_ptr (p_session->p_sys->session,
443 (gnutls_transport_ptr_t)(intptr_t)fd);
446 typedef int (*tls_prio_func) (gnutls_session_t, const int *);
449 gnutls_SetPriority (vlc_object_t *restrict obj, const char *restrict name,
450 tls_prio_func func, gnutls_session_t session,
451 const int *restrict values)
453 int val = func (session, values);
456 msg_Err (obj, "cannot set %s priorities: %s", name,
457 gnutls_strerror (val));
465 gnutls_SessionPrioritize (vlc_object_t *obj, gnutls_session_t session)
467 /* Note that ordering matters (on the client side) */
468 static const int protos[] =
475 static const int comps[] =
481 static const int macs[] =
484 GNUTLS_MAC_RMD160, // RIPEMD
490 static const int ciphers[] =
492 GNUTLS_CIPHER_AES_256_CBC,
493 GNUTLS_CIPHER_AES_128_CBC,
494 GNUTLS_CIPHER_3DES_CBC,
495 GNUTLS_CIPHER_ARCFOUR_128,
496 //GNUTLS_CIPHER_DES_CBC,
497 //GNUTLS_CIPHER_ARCFOUR_40,
498 //GNUTLS_CIPHER_RC2_40_CBC,
499 //GNUTLS_CIPHER_NULL,
502 static const int kx[] =
507 //GNUTLS_KX_RSA_EXPORT,
508 //GNUTLS_KX_DHE_PSK, TODO
509 //GNUTLS_KX_PSK, TODO
510 //GNUTLS_KX_SRP_RSA, TODO
511 //GNUTLS_KX_SRP_DSS, TODO
512 //GNUTLS_KX_SRP, TODO
516 static const int cert_types[] =
519 //GNUTLS_CRT_OPENPGP, TODO
523 int val = gnutls_set_default_priority (session);
526 msg_Err (obj, "cannot set default TLS priorities: %s",
527 gnutls_strerror (val));
531 if (gnutls_SetPriority (obj, "protocols",
532 gnutls_protocol_set_priority, session, protos)
533 || gnutls_SetPriority (obj, "compression algorithms",
534 gnutls_compression_set_priority, session, comps)
535 || gnutls_SetPriority (obj, "MAC algorithms",
536 gnutls_mac_set_priority, session, macs)
537 || gnutls_SetPriority (obj, "ciphers",
538 gnutls_cipher_set_priority, session, ciphers)
539 || gnutls_SetPriority (obj, "key exchange algorithms",
540 gnutls_kx_set_priority, session, kx)
541 || gnutls_SetPriority (obj, "certificate types",
542 gnutls_certificate_type_set_priority, session,
551 gnutls_Addx509File( vlc_object_t *p_this,
552 gnutls_certificate_credentials_t cred,
553 const char *psz_path, vlc_bool_t b_priv );
556 gnutls_Addx509Directory( vlc_object_t *p_this,
557 gnutls_certificate_credentials_t cred,
558 const char *psz_dirname,
563 if( *psz_dirname == '\0' )
566 dir = utf8_opendir( psz_dirname );
571 msg_Err (p_this, "cannot open directory (%s): %m", psz_dirname);
575 msg_Dbg (p_this, "creating empty certificate directory: %s",
577 utf8_mkdir (psz_dirname, b_priv ? 0700 : 0755);
583 struct stat st1, st2;
584 int fd = dirfd( dir );
587 * Gets stats for the directory path, checks that it is not a
588 * symbolic link (to avoid possibly infinite recursion), and verifies
589 * that the inode is still the same, to avoid TOCTOU race condition.
592 || fstat( fd, &st1 ) || utf8_lstat( psz_dirname, &st2 )
593 || S_ISLNK( st2.st_mode ) || ( st1.st_ino != st2.st_ino ) )
603 char *ent = utf8_readdir (dir);
607 if ((strcmp (ent, ".") == 0) || (strcmp (ent, "..") == 0))
610 char path[strlen (psz_dirname) + strlen (ent) + 2];
611 sprintf (path, "%s"DIR_SEP"%s", psz_dirname, ent);
614 gnutls_Addx509File( p_this, cred, path, b_priv );
623 gnutls_Addx509File( vlc_object_t *p_this,
624 gnutls_certificate_credentials cred,
625 const char *psz_path, vlc_bool_t b_priv )
629 if( utf8_stat( psz_path, &st ) == 0 )
631 if( S_ISREG( st.st_mode ) )
633 char *psz_localname = ToLocale( psz_path );
635 ? gnutls_certificate_set_x509_key_file( cred,
636 psz_localname, psz_localname, GNUTLS_X509_FMT_PEM )
637 : gnutls_certificate_set_x509_trust_file( cred,
638 psz_localname, GNUTLS_X509_FMT_PEM );
639 LocaleFree( psz_localname );
643 msg_Warn( p_this, "cannot add x509 credentials (%s): %s",
644 psz_path, gnutls_strerror( i ) );
649 msg_Dbg( p_this, "added x509 credentials (%s)",
654 else if( S_ISDIR( st.st_mode ) )
657 "looking recursively for x509 credentials in %s",
659 return gnutls_Addx509Directory( p_this, cred, psz_path, b_priv);
663 msg_Warn( p_this, "cannot add x509 credentials (%s): %m", psz_path );
668 /** TLS client session data */
669 typedef struct tls_client_sys_t
671 struct tls_session_sys_t session;
672 gnutls_certificate_credentials_t x509_cred;
677 * Initializes a client-side TLS session.
679 static int OpenClient (vlc_object_t *obj)
681 tls_session_t *p_session = (tls_session_t *)obj;
684 if (gnutls_Init (obj))
687 tls_client_sys_t *p_sys = malloc (sizeof (*p_sys));
694 p_session->p_sys = &p_sys->session;
695 p_session->sock.p_sys = p_session;
696 p_session->sock.pf_send = gnutls_Send;
697 p_session->sock.pf_recv = gnutls_Recv;
698 p_session->pf_set_fd = gnutls_SetFD;
700 p_sys->session.b_handshaked = VLC_FALSE;
702 const char *homedir = obj->p_libvlc->psz_datadir,
703 *datadir = config_GetDataDir ();
704 size_t l1 = strlen (homedir), l2 = strlen (datadir);
705 char path[((l1 > l2) ? l1 : l2) + sizeof ("/ca-certificates.crt")];
706 // > sizeof ("/ssl/private")
707 // > sizeof ("/ssl/certs")
709 i_val = gnutls_certificate_allocate_credentials (&p_sys->x509_cred);
712 msg_Err (obj, "cannot allocate X509 credentials: %s",
713 gnutls_strerror (i_val));
717 sprintf (path, "%s/ssl", homedir);
718 utf8_mkdir (path, 0755);
720 sprintf (path, "%s/ssl/certs", homedir);
721 gnutls_Addx509Directory (VLC_OBJECT (p_session),
722 p_sys->x509_cred, path, VLC_FALSE);
724 sprintf (path, "%s/ca-certificates.crt", datadir);
725 gnutls_Addx509File (VLC_OBJECT (p_session),
726 p_sys->x509_cred, path, VLC_FALSE);
727 p_session->pf_handshake = gnutls_HandshakeAndValidate;
728 /*p_session->pf_handshake = gnutls_ContinueHandshake;*/
730 sprintf (path, "%s/ssl/private", homedir);
731 gnutls_Addx509Directory (VLC_OBJECT (p_session), p_sys->x509_cred,
734 i_val = gnutls_init (&p_sys->session.session, GNUTLS_CLIENT);
737 msg_Err (obj, "cannot initialize TLS session: %s",
738 gnutls_strerror (i_val));
739 gnutls_certificate_free_credentials (p_sys->x509_cred);
743 if (gnutls_SessionPrioritize (VLC_OBJECT (p_session),
744 p_sys->session.session))
747 /* minimum DH prime bits */
748 gnutls_dh_set_prime_bits (p_sys->session.session, 1024);
750 i_val = gnutls_credentials_set (p_sys->session.session,
751 GNUTLS_CRD_CERTIFICATE,
755 msg_Err (obj, "cannot set TLS session credentials: %s",
756 gnutls_strerror (i_val));
760 char *servername = var_GetNonEmptyString (p_session, "tls-server-name");
761 if (servername == NULL )
762 msg_Err (p_session, "server name missing for TLS session");
764 p_sys->session.psz_hostname = servername;
765 gnutls_server_name_set (p_sys->session.session, GNUTLS_NAME_DNS,
766 servername, strlen (servername));
771 gnutls_deinit (p_sys->session.session);
772 gnutls_certificate_free_credentials (p_sys->x509_cred);
780 static void CloseClient (vlc_object_t *obj)
782 tls_session_t *client = (tls_session_t *)obj;
783 tls_client_sys_t *p_sys = (tls_client_sys_t *)(client->p_sys);
785 if (p_sys->session.b_handshaked == VLC_TRUE)
786 gnutls_bye (p_sys->session.session, GNUTLS_SHUT_WR);
787 gnutls_deinit (p_sys->session.session);
788 /* credentials must be free'd *after* gnutls_deinit() */
789 gnutls_certificate_free_credentials (p_sys->x509_cred);
792 free (p_sys->session.psz_hostname);
800 struct tls_server_sys_t
802 gnutls_certificate_credentials_t x509_cred;
803 gnutls_dh_params_t dh_params;
805 struct saved_session_t *p_cache;
806 struct saved_session_t *p_store;
808 vlc_mutex_t cache_lock;
810 int (*pf_handshake) (tls_session_t *);
815 * TLS session resumption callbacks (server-side)
817 #define MAX_SESSION_ID 32
818 #define MAX_SESSION_DATA 1024
820 typedef struct saved_session_t
822 char id[MAX_SESSION_ID];
823 char data[MAX_SESSION_DATA];
830 static int cb_store( void *p_server, gnutls_datum key, gnutls_datum data )
832 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
834 if( ( p_sys->i_cache_size == 0 )
835 || ( key.size > MAX_SESSION_ID )
836 || ( data.size > MAX_SESSION_DATA ) )
839 vlc_mutex_lock( &p_sys->cache_lock );
841 memcpy( p_sys->p_store->id, key.data, key.size);
842 memcpy( p_sys->p_store->data, data.data, data.size );
843 p_sys->p_store->i_idlen = key.size;
844 p_sys->p_store->i_datalen = data.size;
847 if( ( p_sys->p_store - p_sys->p_cache ) == p_sys->i_cache_size )
848 p_sys->p_store = p_sys->p_cache;
850 vlc_mutex_unlock( &p_sys->cache_lock );
856 static gnutls_datum cb_fetch( void *p_server, gnutls_datum key )
858 static const gnutls_datum_t err_datum = { NULL, 0 };
859 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
860 saved_session_t *p_session, *p_end;
862 p_session = p_sys->p_cache;
863 p_end = p_session + p_sys->i_cache_size;
865 vlc_mutex_lock( &p_sys->cache_lock );
867 while( p_session < p_end )
869 if( ( p_session->i_idlen == key.size )
870 && !memcmp( p_session->id, key.data, key.size ) )
874 data.size = p_session->i_datalen;
876 data.data = gnutls_malloc( data.size );
877 if( data.data == NULL )
879 vlc_mutex_unlock( &p_sys->cache_lock );
883 memcpy( data.data, p_session->data, data.size );
884 vlc_mutex_unlock( &p_sys->cache_lock );
890 vlc_mutex_unlock( &p_sys->cache_lock );
896 static int cb_delete( void *p_server, gnutls_datum key )
898 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
899 saved_session_t *p_session, *p_end;
901 p_session = p_sys->p_cache;
902 p_end = p_session + p_sys->i_cache_size;
904 vlc_mutex_lock( &p_sys->cache_lock );
906 while( p_session < p_end )
908 if( ( p_session->i_idlen == key.size )
909 && !memcmp( p_session->id, key.data, key.size ) )
911 p_session->i_datalen = p_session->i_idlen = 0;
912 vlc_mutex_unlock( &p_sys->cache_lock );
918 vlc_mutex_unlock( &p_sys->cache_lock );
925 * Terminates TLS session and releases session data.
926 * You still have to close the socket yourself.
929 gnutls_SessionClose (tls_server_t *p_server, tls_session_t *p_session)
931 tls_session_sys_t *p_sys = p_session->p_sys;
934 if( p_sys->b_handshaked == VLC_TRUE )
935 gnutls_bye( p_sys->session, GNUTLS_SHUT_WR );
936 gnutls_deinit( p_sys->session );
938 vlc_object_detach( p_session );
939 vlc_object_destroy( p_session );
946 * Initializes a server-side TLS session.
948 static tls_session_t *
949 gnutls_ServerSessionPrepare( tls_server_t *p_server )
951 tls_session_t *p_session;
952 tls_server_sys_t *p_server_sys;
953 gnutls_session_t session;
956 p_session = vlc_object_create( p_server, sizeof (struct tls_session_t) );
957 if( p_session == NULL )
960 p_session->p_sys = malloc( sizeof(struct tls_session_sys_t) );
961 if( p_session->p_sys == NULL )
963 vlc_object_destroy( p_session );
967 p_server_sys = p_server->p_sys;
968 p_session->sock.p_sys = p_session;
969 p_session->sock.pf_send = gnutls_Send;
970 p_session->sock.pf_recv = gnutls_Recv;
971 p_session->pf_set_fd = gnutls_SetFD;
972 p_session->pf_handshake = p_server_sys->pf_handshake;
974 p_session->p_sys->b_handshaked = VLC_FALSE;
975 p_session->p_sys->psz_hostname = NULL;
977 i_val = gnutls_init( &session, GNUTLS_SERVER );
980 msg_Err( p_server, "cannot initialize TLS session: %s",
981 gnutls_strerror( i_val ) );
985 p_session->p_sys->session = session;
987 if (gnutls_SessionPrioritize (VLC_OBJECT (p_session), session))
989 gnutls_deinit( session );
993 i_val = gnutls_credentials_set( session, GNUTLS_CRD_CERTIFICATE,
994 p_server_sys->x509_cred );
997 msg_Err( p_server, "cannot set TLS session credentials: %s",
998 gnutls_strerror( i_val ) );
999 gnutls_deinit( session );
1003 if (p_session->pf_handshake == gnutls_HandshakeAndValidate)
1004 gnutls_certificate_server_set_request (session, GNUTLS_CERT_REQUIRE);
1006 /* Session resumption support */
1007 i_val = config_GetInt (p_server, "gnutls-cache-timeout");
1008 gnutls_db_set_cache_expiration (session, i_val);
1009 gnutls_db_set_retrieve_function( session, cb_fetch );
1010 gnutls_db_set_remove_function( session, cb_delete );
1011 gnutls_db_set_store_function( session, cb_store );
1012 gnutls_db_set_ptr( session, p_server );
1017 free( p_session->p_sys );
1018 vlc_object_detach( p_session );
1019 vlc_object_destroy( p_session );
1025 * Adds one or more certificate authorities.
1027 * @param psz_ca_path (Unicode) path to an x509 certificates list.
1029 * @return -1 on error, 0 on success.
1032 gnutls_ServerAddCA( tls_server_t *p_server, const char *psz_ca_path )
1034 tls_server_sys_t *p_sys;
1035 char *psz_local_path;
1038 p_sys = (tls_server_sys_t *)(p_server->p_sys);
1040 psz_local_path = ToLocale( psz_ca_path );
1041 val = gnutls_certificate_set_x509_trust_file( p_sys->x509_cred,
1043 GNUTLS_X509_FMT_PEM );
1044 LocaleFree( psz_local_path );
1047 msg_Err( p_server, "cannot add trusted CA (%s): %s", psz_ca_path,
1048 gnutls_strerror( val ) );
1049 return VLC_EGENERIC;
1051 msg_Dbg( p_server, " %d trusted CA added (%s)", val, psz_ca_path );
1053 /* enables peer's certificate verification */
1054 p_sys->pf_handshake = gnutls_HandshakeAndValidate;
1061 * Adds a certificates revocation list to be sent to TLS clients.
1063 * @param psz_crl_path (Unicode) path of the CRL file.
1065 * @return -1 on error, 0 on success.
1068 gnutls_ServerAddCRL( tls_server_t *p_server, const char *psz_crl_path )
1071 char *psz_local_path = ToLocale( psz_crl_path );
1073 val = gnutls_certificate_set_x509_crl_file( ((tls_server_sys_t *)
1074 (p_server->p_sys))->x509_cred,
1076 GNUTLS_X509_FMT_PEM );
1077 LocaleFree( psz_crl_path );
1080 msg_Err( p_server, "cannot add CRL (%s): %s", psz_crl_path,
1081 gnutls_strerror( val ) );
1082 return VLC_EGENERIC;
1084 msg_Dbg( p_server, "%d CRL added (%s)", val, psz_crl_path );
1090 * Allocates a whole server's TLS credentials.
1092 static int OpenServer (vlc_object_t *obj)
1094 tls_server_t *p_server = (tls_server_t *)obj;
1095 tls_server_sys_t *p_sys;
1098 if (gnutls_Init (obj))
1099 return VLC_EGENERIC;
1101 msg_Dbg (obj, "creating TLS server");
1103 p_sys = (tls_server_sys_t *)malloc( sizeof(struct tls_server_sys_t) );
1107 p_sys->i_cache_size = config_GetInt (obj, "gnutls-cache-size");
1108 p_sys->p_cache = calloc (p_sys->i_cache_size,
1109 sizeof (struct saved_session_t));
1110 if (p_sys->p_cache == NULL)
1116 p_sys->p_store = p_sys->p_cache;
1117 p_server->p_sys = p_sys;
1118 p_server->pf_add_CA = gnutls_ServerAddCA;
1119 p_server->pf_add_CRL = gnutls_ServerAddCRL;
1120 p_server->pf_open = gnutls_ServerSessionPrepare;
1121 p_server->pf_close = gnutls_SessionClose;
1123 /* No certificate validation by default */
1124 p_sys->pf_handshake = gnutls_ContinueHandshake;
1126 vlc_mutex_init( p_server, &p_sys->cache_lock );
1128 /* Sets server's credentials */
1129 val = gnutls_certificate_allocate_credentials( &p_sys->x509_cred );
1132 msg_Err( p_server, "cannot allocate X509 credentials: %s",
1133 gnutls_strerror( val ) );
1137 char *psz_cert_path = var_GetNonEmptyString (obj, "tls-x509-cert");
1138 char *psz_key_path = var_GetNonEmptyString (obj, "tls-x509-key");
1139 const char *psz_local_cert = ToLocale (psz_cert_path);
1140 const char *psz_local_key = ToLocale (psz_key_path);
1141 val = gnutls_certificate_set_x509_key_file (p_sys->x509_cred,
1142 psz_local_cert, psz_local_key,
1143 GNUTLS_X509_FMT_PEM );
1144 LocaleFree (psz_local_key);
1145 free (psz_key_path);
1146 LocaleFree (psz_local_cert);
1147 free (psz_cert_path);
1151 msg_Err( p_server, "cannot set certificate chain or private key: %s",
1152 gnutls_strerror( val ) );
1153 gnutls_certificate_free_credentials( p_sys->x509_cred );
1158 * - support other ciper suites
1160 val = gnutls_dh_params_init (&p_sys->dh_params);
1163 const gnutls_datum_t data = {
1164 .data = (unsigned char *)dh_params,
1165 .size = sizeof (dh_params) - 1,
1168 val = gnutls_dh_params_import_pkcs3 (p_sys->dh_params, &data,
1169 GNUTLS_X509_FMT_PEM);
1171 gnutls_certificate_set_dh_params (p_sys->x509_cred,
1176 msg_Err (p_server, "cannot initialize DHE cipher suites: %s",
1177 gnutls_strerror (val));
1183 vlc_mutex_destroy (&p_sys->cache_lock);
1184 free (p_sys->p_cache);
1186 return VLC_EGENERIC;
1190 * Destroys a TLS server object.
1192 static void CloseServer (vlc_object_t *p_server)
1194 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
1196 vlc_mutex_destroy (&p_sys->cache_lock);
1197 free (p_sys->p_cache);
1199 /* all sessions depending on the server are now deinitialized */
1200 gnutls_certificate_free_credentials (p_sys->x509_cred);
1201 gnutls_dh_params_deinit (p_sys->dh_params);
1204 gnutls_Deinit (p_server);