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 #include <vlc_gcrypt.h>
58 #define CACHE_TIMEOUT 3600
63 /*****************************************************************************
65 *****************************************************************************/
66 static int OpenClient (vlc_object_t *);
67 static void CloseClient (vlc_object_t *);
68 static int OpenServer (vlc_object_t *);
69 static void CloseServer (vlc_object_t *);
71 #define CACHE_TIMEOUT_TEXT N_("Expiration time for resumed TLS sessions")
72 #define CACHE_TIMEOUT_LONGTEXT N_( \
73 "It is possible to cache the resumed TLS sessions. This is the expiration "\
74 "time of the sessions stored in this cache, in seconds." )
76 #define CACHE_SIZE_TEXT N_("Number of resumed TLS sessions")
77 #define CACHE_SIZE_LONGTEXT N_( \
78 "This is the maximum number of resumed TLS sessions that " \
79 "the cache will hold." )
82 set_shortname( "GnuTLS" );
83 set_description( _("GnuTLS transport layer security") );
84 set_capability( "tls client", 1 );
85 set_callbacks( OpenClient, CloseClient );
86 set_category( CAT_ADVANCED );
87 set_subcategory( SUBCAT_ADVANCED_MISC );
89 add_obsolete_bool( "tls-check-cert" );
90 add_obsolete_bool( "tls-check-hostname" );
93 set_description( _("GnuTLS server") );
94 set_capability( "tls server", 1 );
95 set_category( CAT_ADVANCED );
96 set_subcategory( SUBCAT_ADVANCED_MISC );
97 set_callbacks( OpenServer, CloseServer );
99 add_obsolete_integer( "gnutls-dh-bits" );
100 add_integer( "gnutls-cache-timeout", CACHE_TIMEOUT, NULL,
101 CACHE_TIMEOUT_TEXT, CACHE_TIMEOUT_LONGTEXT, true );
102 add_integer( "gnutls-cache-size", CACHE_SIZE, NULL, CACHE_SIZE_TEXT,
103 CACHE_SIZE_LONGTEXT, true );
107 * Initializes GnuTLS with proper locking.
108 * @return VLC_SUCCESS on success, a VLC error code otherwise.
110 static int gnutls_Init (vlc_object_t *p_this)
112 int ret = VLC_EGENERIC;
114 vlc_gcrypt_init (); /* GnuTLS depends on gcrypt */
116 vlc_mutex_t *lock = var_AcquireMutex ("gnutls_mutex");
117 if (gnutls_global_init ())
119 msg_Err (p_this, "cannot initialize GnuTLS");
123 const char *psz_version = gnutls_check_version ("1.3.3");
124 if (psz_version == NULL)
126 msg_Err (p_this, "unsupported GnuTLS version");
127 gnutls_global_deinit ();
131 msg_Dbg (p_this, "GnuTLS v%s initialized", psz_version);
135 vlc_mutex_unlock (lock);
141 * Deinitializes GnuTLS.
143 static void gnutls_Deinit (vlc_object_t *p_this)
145 vlc_mutex_t *lock = var_AcquireMutex( "gnutls_mutex" );
147 gnutls_global_deinit ();
148 msg_Dbg (p_this, "GnuTLS deinitialized");
149 vlc_mutex_unlock (lock);
153 static int gnutls_Error (vlc_object_t *obj, int val)
162 /* WinSock does not return EAGAIN, return EINTR instead */
164 case GNUTLS_E_INTERRUPTED:
166 WSASetLastError (WSAEINTR);
173 msg_Err (obj, "%s", gnutls_strerror (val));
175 if (!gnutls_error_is_fatal (val))
176 msg_Err (obj, "Error above should be handled");
179 WSASetLastError (WSAECONNRESET);
188 struct tls_session_sys_t
190 gnutls_session_t session;
197 * Sends data through a TLS session.
200 gnutls_Send( void *p_session, const void *buf, int i_length )
203 tls_session_sys_t *p_sys;
205 p_sys = (tls_session_sys_t *)(((tls_session_t *)p_session)->p_sys);
207 val = gnutls_record_send( p_sys->session, buf, i_length );
208 return (val < 0) ? gnutls_Error ((vlc_object_t *)p_session, val) : val;
213 * Receives data through a TLS session.
216 gnutls_Recv( void *p_session, void *buf, int i_length )
219 tls_session_sys_t *p_sys;
221 p_sys = (tls_session_sys_t *)(((tls_session_t *)p_session)->p_sys);
223 val = gnutls_record_recv( p_sys->session, buf, i_length );
224 return (val < 0) ? gnutls_Error ((vlc_object_t *)p_session, val) : val;
229 * Starts or continues the TLS handshake.
231 * @return -1 on fatal error, 0 on succesful handshake completion,
232 * 1 if more would-be blocking recv is needed,
233 * 2 if more would-be blocking send is required.
236 gnutls_ContinueHandshake (tls_session_t *p_session)
238 tls_session_sys_t *p_sys = p_session->p_sys;
242 WSASetLastError( 0 );
244 val = gnutls_handshake( p_sys->session );
245 if( ( val == GNUTLS_E_AGAIN ) || ( val == GNUTLS_E_INTERRUPTED ) )
246 return 1 + gnutls_record_get_direction( p_sys->session );
251 msg_Dbg( p_session, "Winsock error %d", WSAGetLastError( ) );
253 msg_Err( p_session, "TLS handshake error: %s",
254 gnutls_strerror( val ) );
258 p_sys->b_handshaked = true;
269 static const error_msg_t cert_errors[] =
271 { GNUTLS_CERT_INVALID,
272 "Certificate could not be verified" },
273 { GNUTLS_CERT_REVOKED,
274 "Certificate was revoked" },
275 { GNUTLS_CERT_SIGNER_NOT_FOUND,
276 "Certificate's signer was not found" },
277 { GNUTLS_CERT_SIGNER_NOT_CA,
278 "Certificate's signer is not a CA" },
279 { GNUTLS_CERT_INSECURE_ALGORITHM,
280 "Insecure certificate signature algorithm" },
286 gnutls_HandshakeAndValidate( tls_session_t *session )
288 int val = gnutls_ContinueHandshake( session );
292 tls_session_sys_t *p_sys = (tls_session_sys_t *)(session->p_sys);
294 /* certificates chain verification */
296 val = gnutls_certificate_verify_peers2( p_sys->session, &status );
300 msg_Err( session, "Certificate verification failed: %s",
301 gnutls_strerror( val ) );
307 msg_Err( session, "TLS session: access denied" );
308 for( const error_msg_t *e = cert_errors; e->flag; e++ )
310 if( status & e->flag )
312 msg_Err( session, "%s", e->msg );
319 "unknown certificate error (you found a bug in VLC)" );
324 /* certificate (host)name verification */
325 const gnutls_datum_t *data;
326 data = gnutls_certificate_get_peers (p_sys->session, &(unsigned){0});
329 msg_Err( session, "Peer certificate not available" );
333 gnutls_x509_crt_t cert;
334 val = gnutls_x509_crt_init( &cert );
337 msg_Err( session, "x509 fatal error: %s", gnutls_strerror( val ) );
341 val = gnutls_x509_crt_import( cert, data, GNUTLS_X509_FMT_DER );
344 msg_Err( session, "Certificate import error: %s",
345 gnutls_strerror( val ) );
349 assert( p_sys->psz_hostname != NULL );
350 if ( !gnutls_x509_crt_check_hostname( cert, p_sys->psz_hostname ) )
352 msg_Err( session, "Certificate does not match \"%s\"",
353 p_sys->psz_hostname );
357 if( gnutls_x509_crt_get_expiration_time( cert ) < time( NULL ) )
359 msg_Err( session, "Certificate expired" );
363 if( gnutls_x509_crt_get_activation_time( cert ) > time ( NULL ) )
365 msg_Err( session, "Certificate not yet valid" );
369 gnutls_x509_crt_deinit( cert );
370 msg_Dbg( session, "TLS/x509 certificate verified" );
374 gnutls_x509_crt_deinit( cert );
379 * Sets the operating system file descriptor backend for the TLS sesison.
381 * @param fd stream socket already connected with the peer.
384 gnutls_SetFD (tls_session_t *p_session, int fd)
386 gnutls_transport_set_ptr (p_session->p_sys->session,
387 (gnutls_transport_ptr_t)(intptr_t)fd);
390 typedef int (*tls_prio_func) (gnutls_session_t, const int *);
393 gnutls_SetPriority (vlc_object_t *restrict obj, const char *restrict name,
394 tls_prio_func func, gnutls_session_t session,
395 const int *restrict values)
397 int val = func (session, values);
400 msg_Err (obj, "cannot set %s priorities: %s", name,
401 gnutls_strerror (val));
409 gnutls_SessionPrioritize (vlc_object_t *obj, gnutls_session_t session)
411 /* Note that ordering matters (on the client side) */
412 static const int protos[] =
419 static const int comps[] =
425 static const int macs[] =
428 GNUTLS_MAC_RMD160, // RIPEMD
434 static const int ciphers[] =
436 GNUTLS_CIPHER_AES_256_CBC,
437 GNUTLS_CIPHER_AES_128_CBC,
438 GNUTLS_CIPHER_3DES_CBC,
439 GNUTLS_CIPHER_ARCFOUR_128,
440 //GNUTLS_CIPHER_DES_CBC,
441 //GNUTLS_CIPHER_ARCFOUR_40,
442 //GNUTLS_CIPHER_RC2_40_CBC,
443 //GNUTLS_CIPHER_NULL,
446 static const int kx[] =
451 //GNUTLS_KX_RSA_EXPORT,
452 //GNUTLS_KX_DHE_PSK, TODO
453 //GNUTLS_KX_PSK, TODO
454 //GNUTLS_KX_SRP_RSA, TODO
455 //GNUTLS_KX_SRP_DSS, TODO
456 //GNUTLS_KX_SRP, TODO
460 static const int cert_types[] =
463 //GNUTLS_CRT_OPENPGP, TODO
467 int val = gnutls_set_default_priority (session);
470 msg_Err (obj, "cannot set default TLS priorities: %s",
471 gnutls_strerror (val));
475 if (gnutls_SetPriority (obj, "protocols",
476 gnutls_protocol_set_priority, session, protos)
477 || gnutls_SetPriority (obj, "compression algorithms",
478 gnutls_compression_set_priority, session, comps)
479 || gnutls_SetPriority (obj, "MAC algorithms",
480 gnutls_mac_set_priority, session, macs)
481 || gnutls_SetPriority (obj, "ciphers",
482 gnutls_cipher_set_priority, session, ciphers)
483 || gnutls_SetPriority (obj, "key exchange algorithms",
484 gnutls_kx_set_priority, session, kx)
485 || gnutls_SetPriority (obj, "certificate types",
486 gnutls_certificate_type_set_priority, session,
495 gnutls_Addx509File( vlc_object_t *p_this,
496 gnutls_certificate_credentials_t cred,
497 const char *psz_path, bool b_priv );
500 gnutls_Addx509Directory( vlc_object_t *p_this,
501 gnutls_certificate_credentials_t cred,
502 const char *psz_dirname,
507 if( *psz_dirname == '\0' )
510 dir = utf8_opendir( psz_dirname );
515 msg_Err (p_this, "cannot open directory (%s): %m", psz_dirname);
519 msg_Dbg (p_this, "creating empty certificate directory: %s",
521 utf8_mkdir (psz_dirname, b_priv ? 0700 : 0755);
527 struct stat st1, st2;
528 int fd = dirfd( dir );
531 * Gets stats for the directory path, checks that it is not a
532 * symbolic link (to avoid possibly infinite recursion), and verifies
533 * that the inode is still the same, to avoid TOCTOU race condition.
536 || fstat( fd, &st1 ) || utf8_lstat( psz_dirname, &st2 )
537 || S_ISLNK( st2.st_mode ) || ( st1.st_ino != st2.st_ino ) )
547 char *ent = utf8_readdir (dir);
551 if ((strcmp (ent, ".") == 0) || (strcmp (ent, "..") == 0))
554 char path[strlen (psz_dirname) + strlen (ent) + 2];
555 sprintf (path, "%s"DIR_SEP"%s", psz_dirname, ent);
558 gnutls_Addx509File( p_this, cred, path, b_priv );
567 gnutls_Addx509File( vlc_object_t *p_this,
568 gnutls_certificate_credentials cred,
569 const char *psz_path, bool b_priv )
573 if( utf8_stat( psz_path, &st ) == 0 )
575 if( S_ISREG( st.st_mode ) )
577 char *psz_localname = ToLocale( psz_path );
579 ? gnutls_certificate_set_x509_key_file( cred,
580 psz_localname, psz_localname, GNUTLS_X509_FMT_PEM )
581 : gnutls_certificate_set_x509_trust_file( cred,
582 psz_localname, GNUTLS_X509_FMT_PEM );
583 LocaleFree( psz_localname );
587 msg_Warn( p_this, "cannot add x509 credentials (%s): %s",
588 psz_path, gnutls_strerror( i ) );
593 msg_Dbg( p_this, "added x509 credentials (%s)",
598 else if( S_ISDIR( st.st_mode ) )
601 "looking recursively for x509 credentials in %s",
603 return gnutls_Addx509Directory( p_this, cred, psz_path, b_priv);
607 msg_Warn( p_this, "cannot add x509 credentials (%s): %m", psz_path );
612 /** TLS client session data */
613 typedef struct tls_client_sys_t
615 struct tls_session_sys_t session;
616 gnutls_certificate_credentials_t x509_cred;
621 * Initializes a client-side TLS session.
623 static int OpenClient (vlc_object_t *obj)
625 tls_session_t *p_session = (tls_session_t *)obj;
628 if (gnutls_Init (obj))
631 tls_client_sys_t *p_sys = malloc (sizeof (*p_sys));
638 p_session->p_sys = &p_sys->session;
639 p_session->sock.p_sys = p_session;
640 p_session->sock.pf_send = gnutls_Send;
641 p_session->sock.pf_recv = gnutls_Recv;
642 p_session->pf_set_fd = gnutls_SetFD;
644 p_sys->session.b_handshaked = false;
646 const char *homedir = obj->p_libvlc->psz_datadir,
647 *datadir = config_GetDataDir ();
648 size_t l1 = strlen (homedir), l2 = strlen (datadir);
649 char path[((l1 > l2) ? l1 : l2) + sizeof ("/ca-certificates.crt")];
650 // > sizeof ("/ssl/private")
651 // > sizeof ("/ssl/certs")
653 i_val = gnutls_certificate_allocate_credentials (&p_sys->x509_cred);
656 msg_Err (obj, "cannot allocate X509 credentials: %s",
657 gnutls_strerror (i_val));
661 sprintf (path, "%s/ssl", homedir);
662 utf8_mkdir (path, 0755);
664 sprintf (path, "%s/ssl/certs", homedir);
665 gnutls_Addx509Directory (VLC_OBJECT (p_session),
666 p_sys->x509_cred, path, false);
668 sprintf (path, "%s/ca-certificates.crt", datadir);
669 gnutls_Addx509File (VLC_OBJECT (p_session),
670 p_sys->x509_cred, path, false);
671 p_session->pf_handshake = gnutls_HandshakeAndValidate;
672 /*p_session->pf_handshake = gnutls_ContinueHandshake;*/
674 sprintf (path, "%s/ssl/private", homedir);
675 gnutls_Addx509Directory (VLC_OBJECT (p_session), p_sys->x509_cred,
678 i_val = gnutls_init (&p_sys->session.session, GNUTLS_CLIENT);
681 msg_Err (obj, "cannot initialize TLS session: %s",
682 gnutls_strerror (i_val));
683 gnutls_certificate_free_credentials (p_sys->x509_cred);
687 if (gnutls_SessionPrioritize (VLC_OBJECT (p_session),
688 p_sys->session.session))
691 /* minimum DH prime bits */
692 gnutls_dh_set_prime_bits (p_sys->session.session, 1024);
694 i_val = gnutls_credentials_set (p_sys->session.session,
695 GNUTLS_CRD_CERTIFICATE,
699 msg_Err (obj, "cannot set TLS session credentials: %s",
700 gnutls_strerror (i_val));
704 char *servername = var_GetNonEmptyString (p_session, "tls-server-name");
705 if (servername == NULL )
706 msg_Err (p_session, "server name missing for TLS session");
708 p_sys->session.psz_hostname = servername;
709 gnutls_server_name_set (p_sys->session.session, GNUTLS_NAME_DNS,
710 servername, strlen (servername));
715 gnutls_deinit (p_sys->session.session);
716 gnutls_certificate_free_credentials (p_sys->x509_cred);
724 static void CloseClient (vlc_object_t *obj)
726 tls_session_t *client = (tls_session_t *)obj;
727 tls_client_sys_t *p_sys = (tls_client_sys_t *)(client->p_sys);
729 if (p_sys->session.b_handshaked == true)
730 gnutls_bye (p_sys->session.session, GNUTLS_SHUT_WR);
731 gnutls_deinit (p_sys->session.session);
732 /* credentials must be free'd *after* gnutls_deinit() */
733 gnutls_certificate_free_credentials (p_sys->x509_cred);
736 free (p_sys->session.psz_hostname);
744 struct tls_server_sys_t
746 gnutls_certificate_credentials_t x509_cred;
747 gnutls_dh_params_t dh_params;
749 struct saved_session_t *p_cache;
750 struct saved_session_t *p_store;
752 vlc_mutex_t cache_lock;
754 int (*pf_handshake) (tls_session_t *);
759 * TLS session resumption callbacks (server-side)
761 #define MAX_SESSION_ID 32
762 #define MAX_SESSION_DATA 1024
764 typedef struct saved_session_t
766 char id[MAX_SESSION_ID];
767 char data[MAX_SESSION_DATA];
774 static int cb_store( void *p_server, gnutls_datum key, gnutls_datum data )
776 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
778 if( ( p_sys->i_cache_size == 0 )
779 || ( key.size > MAX_SESSION_ID )
780 || ( data.size > MAX_SESSION_DATA ) )
783 vlc_mutex_lock( &p_sys->cache_lock );
785 memcpy( p_sys->p_store->id, key.data, key.size);
786 memcpy( p_sys->p_store->data, data.data, data.size );
787 p_sys->p_store->i_idlen = key.size;
788 p_sys->p_store->i_datalen = data.size;
791 if( ( p_sys->p_store - p_sys->p_cache ) == p_sys->i_cache_size )
792 p_sys->p_store = p_sys->p_cache;
794 vlc_mutex_unlock( &p_sys->cache_lock );
800 static gnutls_datum cb_fetch( void *p_server, gnutls_datum key )
802 static const gnutls_datum_t err_datum = { NULL, 0 };
803 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
804 saved_session_t *p_session, *p_end;
806 p_session = p_sys->p_cache;
807 p_end = p_session + p_sys->i_cache_size;
809 vlc_mutex_lock( &p_sys->cache_lock );
811 while( p_session < p_end )
813 if( ( p_session->i_idlen == key.size )
814 && !memcmp( p_session->id, key.data, key.size ) )
818 data.size = p_session->i_datalen;
820 data.data = gnutls_malloc( data.size );
821 if( data.data == NULL )
823 vlc_mutex_unlock( &p_sys->cache_lock );
827 memcpy( data.data, p_session->data, data.size );
828 vlc_mutex_unlock( &p_sys->cache_lock );
834 vlc_mutex_unlock( &p_sys->cache_lock );
840 static int cb_delete( void *p_server, gnutls_datum key )
842 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
843 saved_session_t *p_session, *p_end;
845 p_session = p_sys->p_cache;
846 p_end = p_session + p_sys->i_cache_size;
848 vlc_mutex_lock( &p_sys->cache_lock );
850 while( p_session < p_end )
852 if( ( p_session->i_idlen == key.size )
853 && !memcmp( p_session->id, key.data, key.size ) )
855 p_session->i_datalen = p_session->i_idlen = 0;
856 vlc_mutex_unlock( &p_sys->cache_lock );
862 vlc_mutex_unlock( &p_sys->cache_lock );
869 * Terminates TLS session and releases session data.
870 * You still have to close the socket yourself.
873 gnutls_SessionClose (tls_server_t *p_server, tls_session_t *p_session)
875 tls_session_sys_t *p_sys = p_session->p_sys;
878 if( p_sys->b_handshaked == true )
879 gnutls_bye( p_sys->session, GNUTLS_SHUT_WR );
880 gnutls_deinit( p_sys->session );
882 vlc_object_detach( p_session );
883 vlc_object_release( p_session );
890 * Initializes a server-side TLS session.
892 static tls_session_t *
893 gnutls_ServerSessionPrepare( tls_server_t *p_server )
895 tls_session_t *p_session;
896 tls_server_sys_t *p_server_sys;
897 gnutls_session_t session;
900 p_session = vlc_object_create( p_server, sizeof (struct tls_session_t) );
901 if( p_session == NULL )
904 p_session->p_sys = malloc( sizeof(struct tls_session_sys_t) );
905 if( p_session->p_sys == NULL )
907 vlc_object_release( p_session );
911 p_server_sys = p_server->p_sys;
912 p_session->sock.p_sys = p_session;
913 p_session->sock.pf_send = gnutls_Send;
914 p_session->sock.pf_recv = gnutls_Recv;
915 p_session->pf_set_fd = gnutls_SetFD;
916 p_session->pf_handshake = p_server_sys->pf_handshake;
918 p_session->p_sys->b_handshaked = false;
919 p_session->p_sys->psz_hostname = NULL;
921 i_val = gnutls_init( &session, GNUTLS_SERVER );
924 msg_Err( p_server, "cannot initialize TLS session: %s",
925 gnutls_strerror( i_val ) );
929 p_session->p_sys->session = session;
931 if (gnutls_SessionPrioritize (VLC_OBJECT (p_session), session))
933 gnutls_deinit( session );
937 i_val = gnutls_credentials_set( session, GNUTLS_CRD_CERTIFICATE,
938 p_server_sys->x509_cred );
941 msg_Err( p_server, "cannot set TLS session credentials: %s",
942 gnutls_strerror( i_val ) );
943 gnutls_deinit( session );
947 if (p_session->pf_handshake == gnutls_HandshakeAndValidate)
948 gnutls_certificate_server_set_request (session, GNUTLS_CERT_REQUIRE);
950 /* Session resumption support */
951 i_val = config_GetInt (p_server, "gnutls-cache-timeout");
952 gnutls_db_set_cache_expiration (session, i_val);
953 gnutls_db_set_retrieve_function( session, cb_fetch );
954 gnutls_db_set_remove_function( session, cb_delete );
955 gnutls_db_set_store_function( session, cb_store );
956 gnutls_db_set_ptr( session, p_server );
961 free( p_session->p_sys );
962 vlc_object_detach( p_session );
963 vlc_object_release( p_session );
969 * Adds one or more certificate authorities.
971 * @param psz_ca_path (Unicode) path to an x509 certificates list.
973 * @return -1 on error, 0 on success.
976 gnutls_ServerAddCA( tls_server_t *p_server, const char *psz_ca_path )
978 tls_server_sys_t *p_sys;
979 char *psz_local_path;
982 p_sys = (tls_server_sys_t *)(p_server->p_sys);
984 psz_local_path = ToLocale( psz_ca_path );
985 val = gnutls_certificate_set_x509_trust_file( p_sys->x509_cred,
987 GNUTLS_X509_FMT_PEM );
988 LocaleFree( psz_local_path );
991 msg_Err( p_server, "cannot add trusted CA (%s): %s", psz_ca_path,
992 gnutls_strerror( val ) );
995 msg_Dbg( p_server, " %d trusted CA added (%s)", val, psz_ca_path );
997 /* enables peer's certificate verification */
998 p_sys->pf_handshake = gnutls_HandshakeAndValidate;
1005 * Adds a certificates revocation list to be sent to TLS clients.
1007 * @param psz_crl_path (Unicode) path of the CRL file.
1009 * @return -1 on error, 0 on success.
1012 gnutls_ServerAddCRL( tls_server_t *p_server, const char *psz_crl_path )
1015 char *psz_local_path = ToLocale( psz_crl_path );
1017 val = gnutls_certificate_set_x509_crl_file( ((tls_server_sys_t *)
1018 (p_server->p_sys))->x509_cred,
1020 GNUTLS_X509_FMT_PEM );
1021 LocaleFree( psz_crl_path );
1024 msg_Err( p_server, "cannot add CRL (%s): %s", psz_crl_path,
1025 gnutls_strerror( val ) );
1026 return VLC_EGENERIC;
1028 msg_Dbg( p_server, "%d CRL added (%s)", val, psz_crl_path );
1034 * Allocates a whole server's TLS credentials.
1036 static int OpenServer (vlc_object_t *obj)
1038 tls_server_t *p_server = (tls_server_t *)obj;
1039 tls_server_sys_t *p_sys;
1042 if (gnutls_Init (obj))
1043 return VLC_EGENERIC;
1045 msg_Dbg (obj, "creating TLS server");
1047 p_sys = (tls_server_sys_t *)malloc( sizeof(struct tls_server_sys_t) );
1051 p_sys->i_cache_size = config_GetInt (obj, "gnutls-cache-size");
1052 p_sys->p_cache = calloc (p_sys->i_cache_size,
1053 sizeof (struct saved_session_t));
1054 if (p_sys->p_cache == NULL)
1060 p_sys->p_store = p_sys->p_cache;
1061 p_server->p_sys = p_sys;
1062 p_server->pf_add_CA = gnutls_ServerAddCA;
1063 p_server->pf_add_CRL = gnutls_ServerAddCRL;
1064 p_server->pf_open = gnutls_ServerSessionPrepare;
1065 p_server->pf_close = gnutls_SessionClose;
1067 /* No certificate validation by default */
1068 p_sys->pf_handshake = gnutls_ContinueHandshake;
1070 vlc_mutex_init( &p_sys->cache_lock );
1072 /* Sets server's credentials */
1073 val = gnutls_certificate_allocate_credentials( &p_sys->x509_cred );
1076 msg_Err( p_server, "cannot allocate X509 credentials: %s",
1077 gnutls_strerror( val ) );
1081 char *psz_cert_path = var_GetNonEmptyString (obj, "tls-x509-cert");
1082 char *psz_key_path = var_GetNonEmptyString (obj, "tls-x509-key");
1083 const char *psz_local_cert = ToLocale (psz_cert_path);
1084 const char *psz_local_key = ToLocale (psz_key_path);
1085 val = gnutls_certificate_set_x509_key_file (p_sys->x509_cred,
1086 psz_local_cert, psz_local_key,
1087 GNUTLS_X509_FMT_PEM );
1088 LocaleFree (psz_local_key);
1089 free (psz_key_path);
1090 LocaleFree (psz_local_cert);
1091 free (psz_cert_path);
1095 msg_Err( p_server, "cannot set certificate chain or private key: %s",
1096 gnutls_strerror( val ) );
1097 gnutls_certificate_free_credentials( p_sys->x509_cred );
1102 * - support other ciper suites
1104 val = gnutls_dh_params_init (&p_sys->dh_params);
1107 const gnutls_datum_t data = {
1108 .data = (unsigned char *)dh_params,
1109 .size = sizeof (dh_params) - 1,
1112 val = gnutls_dh_params_import_pkcs3 (p_sys->dh_params, &data,
1113 GNUTLS_X509_FMT_PEM);
1115 gnutls_certificate_set_dh_params (p_sys->x509_cred,
1120 msg_Err (p_server, "cannot initialize DHE cipher suites: %s",
1121 gnutls_strerror (val));
1127 vlc_mutex_destroy (&p_sys->cache_lock);
1128 free (p_sys->p_cache);
1130 return VLC_EGENERIC;
1134 * Destroys a TLS server object.
1136 static void CloseServer (vlc_object_t *p_server)
1138 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
1140 vlc_mutex_destroy (&p_sys->cache_lock);
1141 free (p_sys->p_cache);
1143 /* all sessions depending on the server are now deinitialized */
1144 gnutls_certificate_free_credentials (p_sys->x509_cred);
1145 gnutls_dh_params_deinit (p_sys->dh_params);
1148 gnutls_Deinit (p_server);