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 <sys/types.h>
38 #ifdef HAVE_SYS_STAT_H
39 # include <sys/stat.h>
47 #include <vlc_charset.h>
50 #include <gnutls/gnutls.h>
51 #include <gnutls/x509.h>
54 #define CACHE_EXPIRATION 3600
57 /*****************************************************************************
59 *****************************************************************************/
60 static int Open ( vlc_object_t * );
61 static void Close( vlc_object_t * );
63 #define DH_BITS_TEXT N_("Diffie-Hellman prime bits")
64 #define DH_BITS_LONGTEXT N_( \
65 "This allows you to modify the Diffie-Hellman prime's number of bits, " \
66 "used for TLS or SSL-based server-side encryption. This is generally " \
69 #define CACHE_EXPIRATION_TEXT N_("Expiration time for resumed TLS sessions")
70 #define CACHE_EXPIRATION_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." )
79 #define CHECK_CERT_TEXT N_("Check TLS/SSL server certificate validity")
80 #define CHECK_CERT_LONGTEXT N_( \
81 "This ensures that the server certificate is valid " \
82 "(i.e. signed by an approved Certification Authority)." )
84 #define CHECK_HOSTNAME_TEXT N_("Check TLS/SSL server hostname in certificate")
85 #define CHECK_HOSTNAME_LONGTEXT N_( \
86 "This ensures that the server hostname in certificate matches the " \
87 "requested host name." )
90 set_shortname( "GnuTLS" );
91 set_description( _("GnuTLS TLS encryption layer") );
92 set_capability( "tls", 1 );
93 set_callbacks( Open, Close );
94 set_category( CAT_ADVANCED );
95 set_subcategory( SUBCAT_ADVANCED_MISC );
97 add_bool( "tls-check-cert", VLC_TRUE, NULL, CHECK_CERT_TEXT,
98 CHECK_CERT_LONGTEXT, VLC_FALSE );
99 add_bool( "tls-check-hostname", VLC_TRUE, NULL, CHECK_HOSTNAME_TEXT,
100 CHECK_HOSTNAME_LONGTEXT, VLC_FALSE );
102 add_integer( "gnutls-dh-bits", DH_BITS, NULL, DH_BITS_TEXT,
103 DH_BITS_LONGTEXT, VLC_TRUE );
104 add_integer( "gnutls-cache-expiration", CACHE_EXPIRATION, NULL,
105 CACHE_EXPIRATION_TEXT, CACHE_EXPIRATION_LONGTEXT, VLC_TRUE );
106 add_integer( "gnutls-cache-size", CACHE_SIZE, NULL, CACHE_SIZE_TEXT,
107 CACHE_SIZE_LONGTEXT, VLC_TRUE );
111 #define MAX_SESSION_ID 32
112 #define MAX_SESSION_DATA 1024
114 static const int proto_priority[] =
123 static const int cert_type_priority[] =
126 //GNUTLS_CRT_OPENPGP, TODO
131 typedef struct saved_session_t
133 char id[MAX_SESSION_ID];
134 char data[MAX_SESSION_DATA];
141 typedef struct tls_server_sys_t
143 gnutls_certificate_credentials x509_cred;
144 gnutls_dh_params dh_params;
146 struct saved_session_t *p_cache;
147 struct saved_session_t *p_store;
149 vlc_mutex_t cache_lock;
151 int (*pf_handshake2)( tls_session_t * );
155 typedef struct tls_session_sys_t
157 gnutls_session session;
159 vlc_bool_t b_handshaked;
163 typedef struct tls_client_sys_t
165 struct tls_session_sys_t session;
166 gnutls_certificate_credentials x509_cred;
171 * Sends data through a TLS session.
174 gnutls_Send( void *p_session, const void *buf, int i_length )
177 tls_session_sys_t *p_sys;
179 p_sys = (tls_session_sys_t *)(((tls_session_t *)p_session)->p_sys);
181 val = gnutls_record_send( p_sys->session, buf, i_length );
182 /* TODO: handle fatal error */
183 return val < 0 ? -1 : val;
188 * Receives data through a TLS session.
191 gnutls_Recv( void *p_session, void *buf, int i_length )
194 tls_session_sys_t *p_sys;
196 p_sys = (tls_session_sys_t *)(((tls_session_t *)p_session)->p_sys);
198 val = gnutls_record_recv( p_sys->session, buf, i_length );
199 /* TODO: handle fatal error */
200 return val < 0 ? -1 : val;
204 /*****************************************************************************
205 * tls_Session(Continue)?Handshake:
206 *****************************************************************************
207 * Establishes TLS session with a peer through socket <fd>.
208 * Returns -1 on error (you need not and must not call tls_SessionClose)
209 * 0 on succesful handshake completion, 1 if more would-be blocking recv is
210 * needed, 2 if more would-be blocking send is required.
211 *****************************************************************************/
213 gnutls_ContinueHandshake( tls_session_t *p_session)
215 tls_session_sys_t *p_sys;
218 p_sys = (tls_session_sys_t *)(p_session->p_sys);
220 /* TODO: handle fatal error */
222 WSASetLastError( 0 );
224 val = gnutls_handshake( p_sys->session );
225 if( ( val == GNUTLS_E_AGAIN ) || ( val == GNUTLS_E_INTERRUPTED ) )
226 return 1 + gnutls_record_get_direction( p_sys->session );
231 msg_Dbg( p_session, "Winsock error %d", WSAGetLastError( ) );
233 msg_Err( p_session, "TLS handshake failed: %s",
234 gnutls_strerror( val ) );
235 p_session->pf_close( p_session );
239 p_sys->b_handshaked = VLC_TRUE;
250 static const error_msg_t cert_errors[] =
252 { GNUTLS_CERT_INVALID,
253 "Certificate could not be verified" },
254 { GNUTLS_CERT_REVOKED,
255 "Certificate was revoked" },
256 { GNUTLS_CERT_SIGNER_NOT_FOUND,
257 "Certificate's signer was not found" },
258 { GNUTLS_CERT_SIGNER_NOT_CA,
259 "Certificate's signer is not a CA" },
260 { GNUTLS_CERT_INSECURE_ALGORITHM,
261 "Insecure certificate signature algorithm" },
267 gnutls_HandshakeAndValidate( tls_session_t *session )
269 int val = gnutls_ContinueHandshake( session );
273 tls_session_sys_t *p_sys = (tls_session_sys_t *)(session->p_sys);
275 /* certificates chain verification */
277 val = gnutls_certificate_verify_peers2( p_sys->session, &status );
281 msg_Err( session, "Certificate verification failed: %s",
282 gnutls_strerror( val ) );
288 msg_Err( session, "TLS session: access denied" );
289 for( const error_msg_t *e = cert_errors; e->flag; e++ )
291 if( status & e->flag )
293 msg_Err( session, e->msg );
300 "unknown certificate error (you found a bug in VLC)" );
305 /* certificate (host)name verification */
306 const gnutls_datum *data = gnutls_certificate_get_peers( p_sys->session,
310 msg_Err( session, "Peer certificate not available" );
314 gnutls_x509_crt cert;
315 val = gnutls_x509_crt_init( &cert );
318 msg_Err( session, "x509 fatal error: %s", gnutls_strerror( val ) );
322 val = gnutls_x509_crt_import( cert, data, GNUTLS_X509_FMT_DER );
325 msg_Err( session, "Certificate import error: %s",
326 gnutls_strerror( val ) );
327 gnutls_x509_crt_deinit( cert );
331 if( p_sys->psz_hostname != NULL )
333 if ( !gnutls_x509_crt_check_hostname( cert, p_sys->psz_hostname ) )
335 msg_Err( session, "Certificate does not match \"%s\"",
336 p_sys->psz_hostname );
341 msg_Warn( session, "Certificate and hostname were not verified" );
343 if( gnutls_x509_crt_get_expiration_time( cert ) < time( NULL ) )
345 msg_Err( session, "Certificate expired" );
349 if( gnutls_x509_crt_get_activation_time( cert ) > time ( NULL ) )
351 msg_Err( session, "Certificate not yet valid" );
355 gnutls_x509_crt_deinit( cert );
356 msg_Dbg( session, "TLS/x509 certificate verified" );
360 gnutls_x509_crt_deinit( cert );
362 session->pf_close( session );
367 * Starts negociation of a TLS session.
369 * @param fd stream socket already connected with the peer.
370 * @param psz_hostname if not NULL, hostname to mention as a Server Name.
372 * @return -1 on error (you need not and must not call tls_SessionClose),
373 * 0 on succesful handshake completion, 1 if more would-be blocking recv is
374 * needed, 2 if more would-be blocking send is required.
377 gnutls_BeginHandshake( tls_session_t *p_session, int fd,
378 const char *psz_hostname )
380 tls_session_sys_t *p_sys;
382 p_sys = (tls_session_sys_t *)(p_session->p_sys);
384 gnutls_transport_set_ptr (p_sys->session, (gnutls_transport_ptr)(intptr_t)fd);
386 if( psz_hostname != NULL )
388 gnutls_server_name_set( p_sys->session, GNUTLS_NAME_DNS, psz_hostname,
389 strlen( psz_hostname ) );
390 if (var_CreateGetBool (p_session, "tls-check-hostname"))
392 p_sys->psz_hostname = strdup( psz_hostname );
393 if( p_sys->psz_hostname == NULL )
395 p_session->pf_close( p_session );
401 return p_session->pf_handshake2( p_session );
405 * Terminates TLS session and releases session data.
406 * You still have to close the socket yourself.
409 gnutls_SessionClose( tls_session_t *p_session )
411 tls_session_sys_t *p_sys;
413 p_sys = (tls_session_sys_t *)(p_session->p_sys);
415 if( p_sys->b_handshaked == VLC_TRUE )
416 gnutls_bye( p_sys->session, GNUTLS_SHUT_WR );
417 gnutls_deinit( p_sys->session );
419 if( p_sys->psz_hostname != NULL )
420 free( p_sys->psz_hostname );
422 vlc_object_detach( p_session );
423 vlc_object_destroy( p_session );
430 gnutls_SessionPrioritize (vlc_object_t *obj, gnutls_session_t session)
434 val = gnutls_set_default_priority (session);
437 msg_Err (obj, "cannot set TLS priorities: %s",
438 gnutls_strerror (val));
442 val = gnutls_protocol_set_priority (session, proto_priority);
445 msg_Err (obj, "cannot set protocols priorities: %s",
446 gnutls_strerror (val));
450 val = gnutls_certificate_type_set_priority (session, cert_type_priority);
453 msg_Err (obj, "cannot set certificate type priorities: %s",
454 gnutls_strerror (val));
463 gnutls_ClientDelete( tls_session_t *p_session )
465 /* On the client-side, credentials are re-allocated per session */
466 gnutls_certificate_credentials x509_cred =
467 ((tls_client_sys_t *)(p_session->p_sys))->x509_cred;
469 gnutls_SessionClose( p_session );
471 /* credentials must be free'd *after* gnutls_deinit() */
472 gnutls_certificate_free_credentials( x509_cred );
477 gnutls_Addx509File( vlc_object_t *p_this,
478 gnutls_certificate_credentials cred,
479 const char *psz_path, vlc_bool_t b_priv );
482 gnutls_Addx509Directory( vlc_object_t *p_this,
483 gnutls_certificate_credentials cred,
484 const char *psz_dirname,
489 if( *psz_dirname == '\0' )
492 dir = utf8_opendir( psz_dirname );
495 msg_Warn( p_this, "cannot open directory (%s): %s", psz_dirname,
502 struct stat st1, st2;
503 int fd = dirfd( dir );
506 * Gets stats for the directory path, checks that it is not a
507 * symbolic link (to avoid possibly infinite recursion), and verifies
508 * that the inode is still the same, to avoid TOCTOU race condition.
511 || fstat( fd, &st1 ) || utf8_lstat( psz_dirname, &st2 )
512 || S_ISLNK( st2.st_mode ) || ( st1.st_ino != st2.st_ino ) )
522 char *ent = utf8_readdir (dir);
526 if ((strcmp (ent, ".") == 0) || (strcmp (ent, "..") == 0))
529 char path[strlen (psz_dirname) + strlen (ent) + 2];
530 sprintf (path, "%s"DIR_SEP"%s", psz_dirname, ent);
533 gnutls_Addx509File( p_this, cred, path, b_priv );
542 gnutls_Addx509File( vlc_object_t *p_this,
543 gnutls_certificate_credentials cred,
544 const char *psz_path, vlc_bool_t b_priv )
548 if( utf8_stat( psz_path, &st ) == 0 )
550 if( S_ISREG( st.st_mode ) )
552 char *psz_localname = ToLocale( psz_path );
554 ? gnutls_certificate_set_x509_key_file( cred,
555 psz_localname, psz_localname, GNUTLS_X509_FMT_PEM )
556 : gnutls_certificate_set_x509_trust_file( cred,
557 psz_localname, GNUTLS_X509_FMT_PEM );
558 LocaleFree( psz_localname );
562 msg_Warn( p_this, "cannot add x509 credentials (%s): %s",
563 psz_path, gnutls_strerror( i ) );
568 msg_Dbg( p_this, "added x509 credentials (%s)",
573 else if( S_ISDIR( st.st_mode ) )
576 "looking recursively for x509 credentials in %s",
578 return gnutls_Addx509Directory( p_this, cred, psz_path, b_priv);
582 msg_Warn( p_this, "cannot add x509 credentials (%s): %s",
583 psz_path, strerror( errno ) );
589 * Initializes a client-side TLS session.
591 static tls_session_t *
592 gnutls_ClientCreate( tls_t *p_tls )
594 tls_session_t *p_session = NULL;
595 tls_client_sys_t *p_sys = NULL;
598 p_sys = (tls_client_sys_t *)malloc( sizeof(struct tls_client_sys_t) );
602 p_session = (struct tls_session_t *)vlc_object_create ( p_tls, sizeof(struct tls_session_t) );
603 if( p_session == NULL )
609 p_session->p_sys = p_sys;
610 p_session->sock.p_sys = p_session;
611 p_session->sock.pf_send = gnutls_Send;
612 p_session->sock.pf_recv = gnutls_Recv;
613 p_session->pf_handshake = gnutls_BeginHandshake;
614 p_session->pf_close = gnutls_ClientDelete;
616 p_sys->session.b_handshaked = VLC_FALSE;
617 p_sys->session.psz_hostname = NULL;
619 vlc_object_attach( p_session, p_tls );
621 const char *homedir = p_tls->p_libvlc->psz_homedir,
622 *datadir = config_GetDataDir ((vlc_object_t *)p_session);
623 size_t l1 = strlen (homedir), l2 = strlen (datadir);
624 char path[((l1 > l2) ? l1 : l2) + sizeof ("/"CONFIG_DIR"/ssl/private")];
625 // > sizeof ("/"CONFIG_DIR"/ssl/certs")
626 // > sizeof ("/ca-certificates.crt")
628 i_val = gnutls_certificate_allocate_credentials( &p_sys->x509_cred );
631 msg_Err( p_tls, "cannot allocate X509 credentials: %s",
632 gnutls_strerror( i_val ) );
636 if (var_CreateGetBool (p_tls, "tls-check-cert"))
638 sprintf (path, "%s/"CONFIG_DIR"/ssl/certs", homedir);
639 gnutls_Addx509Directory ((vlc_object_t *)p_session,
640 p_sys->x509_cred, path, VLC_FALSE);
642 sprintf (path, "%s/ca-certificates.crt", datadir);
643 gnutls_Addx509File ((vlc_object_t *)p_session,
644 p_sys->x509_cred, path, VLC_FALSE);
645 p_session->pf_handshake2 = gnutls_HandshakeAndValidate;
648 p_session->pf_handshake2 = gnutls_ContinueHandshake;
650 sprintf (path, "%s/"CONFIG_DIR"/ssl/private", homedir);
651 gnutls_Addx509Directory ((vlc_object_t *)p_session, p_sys->x509_cred,
654 i_val = gnutls_init( &p_sys->session.session, GNUTLS_CLIENT );
657 msg_Err( p_tls, "cannot initialize TLS session: %s",
658 gnutls_strerror( i_val ) );
659 gnutls_certificate_free_credentials( p_sys->x509_cred );
663 if (gnutls_SessionPrioritize (VLC_OBJECT (p_session),
664 p_sys->session.session))
667 i_val = gnutls_credentials_set( p_sys->session.session,
668 GNUTLS_CRD_CERTIFICATE,
672 msg_Err( p_tls, "cannot set TLS session credentials: %s",
673 gnutls_strerror( i_val ) );
680 gnutls_deinit( p_sys->session.session );
681 gnutls_certificate_free_credentials( p_sys->x509_cred );
684 vlc_object_detach( p_session );
685 vlc_object_destroy( p_session );
693 * TLS session resumption callbacks (server-side)
695 static int cb_store( void *p_server, gnutls_datum key, gnutls_datum data )
697 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
699 if( ( p_sys->i_cache_size == 0 )
700 || ( key.size > MAX_SESSION_ID )
701 || ( data.size > MAX_SESSION_DATA ) )
704 vlc_mutex_lock( &p_sys->cache_lock );
706 memcpy( p_sys->p_store->id, key.data, key.size);
707 memcpy( p_sys->p_store->data, data.data, data.size );
708 p_sys->p_store->i_idlen = key.size;
709 p_sys->p_store->i_datalen = data.size;
712 if( ( p_sys->p_store - p_sys->p_cache ) == p_sys->i_cache_size )
713 p_sys->p_store = p_sys->p_cache;
715 vlc_mutex_unlock( &p_sys->cache_lock );
721 static const gnutls_datum err_datum = { NULL, 0 };
723 static gnutls_datum cb_fetch( void *p_server, gnutls_datum key )
725 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
726 saved_session_t *p_session, *p_end;
728 p_session = p_sys->p_cache;
729 p_end = p_session + p_sys->i_cache_size;
731 vlc_mutex_lock( &p_sys->cache_lock );
733 while( p_session < p_end )
735 if( ( p_session->i_idlen == key.size )
736 && !memcmp( p_session->id, key.data, key.size ) )
740 data.size = p_session->i_datalen;
742 data.data = gnutls_malloc( data.size );
743 if( data.data == NULL )
745 vlc_mutex_unlock( &p_sys->cache_lock );
749 memcpy( data.data, p_session->data, data.size );
750 vlc_mutex_unlock( &p_sys->cache_lock );
756 vlc_mutex_unlock( &p_sys->cache_lock );
762 static int cb_delete( void *p_server, gnutls_datum key )
764 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
765 saved_session_t *p_session, *p_end;
767 p_session = p_sys->p_cache;
768 p_end = p_session + p_sys->i_cache_size;
770 vlc_mutex_lock( &p_sys->cache_lock );
772 while( p_session < p_end )
774 if( ( p_session->i_idlen == key.size )
775 && !memcmp( p_session->id, key.data, key.size ) )
777 p_session->i_datalen = p_session->i_idlen = 0;
778 vlc_mutex_unlock( &p_sys->cache_lock );
784 vlc_mutex_unlock( &p_sys->cache_lock );
791 * Initializes a server-side TLS session.
793 static tls_session_t *
794 gnutls_ServerSessionPrepare( tls_server_t *p_server )
796 tls_session_t *p_session;
797 tls_server_sys_t *p_server_sys;
798 gnutls_session session;
801 p_session = vlc_object_create( p_server, sizeof (struct tls_session_t) );
802 if( p_session == NULL )
805 p_session->p_sys = malloc( sizeof(struct tls_session_sys_t) );
806 if( p_session->p_sys == NULL )
808 vlc_object_destroy( p_session );
812 vlc_object_attach( p_session, p_server );
814 p_server_sys = (tls_server_sys_t *)p_server->p_sys;
815 p_session->sock.p_sys = p_session;
816 p_session->sock.pf_send = gnutls_Send;
817 p_session->sock.pf_recv = gnutls_Recv;
818 p_session->pf_handshake = gnutls_BeginHandshake;
819 p_session->pf_handshake2 = p_server_sys->pf_handshake2;
820 p_session->pf_close = gnutls_SessionClose;
822 ((tls_session_sys_t *)p_session->p_sys)->b_handshaked = VLC_FALSE;
823 ((tls_session_sys_t *)p_session->p_sys)->psz_hostname = NULL;
825 i_val = gnutls_init( &session, GNUTLS_SERVER );
828 msg_Err( p_server, "cannot initialize TLS session: %s",
829 gnutls_strerror( i_val ) );
833 ((tls_session_sys_t *)p_session->p_sys)->session = session;
835 i_val = gnutls_set_default_priority( session );
836 if (gnutls_SessionPrioritize (VLC_OBJECT (p_session), session))
838 gnutls_deinit( session );
842 i_val = gnutls_credentials_set( session, GNUTLS_CRD_CERTIFICATE,
843 p_server_sys->x509_cred );
846 msg_Err( p_server, "cannot set TLS session credentials: %s",
847 gnutls_strerror( i_val ) );
848 gnutls_deinit( session );
852 if( p_session->pf_handshake2 == gnutls_HandshakeAndValidate )
853 gnutls_certificate_server_set_request( session, GNUTLS_CERT_REQUIRE );
855 i_val = config_GetInt (p_server, "gnutls-dh-bits");
856 gnutls_dh_set_prime_bits (session, i_val);
858 /* Session resumption support */
859 i_val = config_GetInt (p_server, "gnutls-cache-expiration");
860 gnutls_db_set_cache_expiration (session, i_val);
861 gnutls_db_set_retrieve_function( session, cb_fetch );
862 gnutls_db_set_remove_function( session, cb_delete );
863 gnutls_db_set_store_function( session, cb_store );
864 gnutls_db_set_ptr( session, p_server );
869 free( p_session->p_sys );
870 vlc_object_detach( p_session );
871 vlc_object_destroy( p_session );
877 * Releases data allocated with tls_ServerCreate().
880 gnutls_ServerDelete( tls_server_t *p_server )
882 tls_server_sys_t *p_sys;
883 p_sys = (tls_server_sys_t *)p_server->p_sys;
885 vlc_mutex_destroy( &p_sys->cache_lock );
886 free( p_sys->p_cache );
888 vlc_object_detach( p_server );
889 vlc_object_destroy( p_server );
891 /* all sessions depending on the server are now deinitialized */
892 gnutls_certificate_free_credentials( p_sys->x509_cred );
893 gnutls_dh_params_deinit( p_sys->dh_params );
899 * Adds one or more certificate authorities.
901 * @param psz_ca_path (Unicode) path to an x509 certificates list.
903 * @return -1 on error, 0 on success.
904 *****************************************************************************/
906 gnutls_ServerAddCA( tls_server_t *p_server, const char *psz_ca_path )
908 tls_server_sys_t *p_sys;
909 char *psz_local_path;
912 p_sys = (tls_server_sys_t *)(p_server->p_sys);
914 psz_local_path = ToLocale( psz_ca_path );
915 val = gnutls_certificate_set_x509_trust_file( p_sys->x509_cred,
917 GNUTLS_X509_FMT_PEM );
918 LocaleFree( psz_local_path );
921 msg_Err( p_server, "cannot add trusted CA (%s): %s", psz_ca_path,
922 gnutls_strerror( val ) );
925 msg_Dbg( p_server, " %d trusted CA added (%s)", val, psz_ca_path );
927 /* enables peer's certificate verification */
928 p_sys->pf_handshake2 = gnutls_HandshakeAndValidate;
935 * Adds a certificates revocation list to be sent to TLS clients.
937 * @param psz_crl_path (Unicode) path of the CRL file.
939 * @return -1 on error, 0 on success.
942 gnutls_ServerAddCRL( tls_server_t *p_server, const char *psz_crl_path )
945 char *psz_local_path = ToLocale( psz_crl_path );
947 val = gnutls_certificate_set_x509_crl_file( ((tls_server_sys_t *)
948 (p_server->p_sys))->x509_cred,
950 GNUTLS_X509_FMT_PEM );
951 LocaleFree( psz_crl_path );
954 msg_Err( p_server, "cannot add CRL (%s): %s", psz_crl_path,
955 gnutls_strerror( val ) );
958 msg_Dbg( p_server, "%d CRL added (%s)", val, psz_crl_path );
964 * Allocates a whole server's TLS credentials.
966 * @return NULL on error.
968 static tls_server_t *
969 gnutls_ServerCreate( tls_t *p_tls, const char *psz_cert_path,
970 const char *psz_key_path )
972 tls_server_t *p_server;
973 tls_server_sys_t *p_sys;
974 char *psz_local_key, *psz_local_cert;
977 msg_Dbg( p_tls, "creating TLS server" );
979 p_sys = (tls_server_sys_t *)malloc( sizeof(struct tls_server_sys_t) );
983 p_sys->i_cache_size = config_GetInt (p_tls, "gnutls-cache-size");
984 p_sys->p_cache = (struct saved_session_t *)calloc( p_sys->i_cache_size,
985 sizeof( struct saved_session_t ) );
986 if( p_sys->p_cache == NULL )
991 p_sys->p_store = p_sys->p_cache;
993 p_server = vlc_object_create( p_tls, sizeof(struct tls_server_t) );
994 if( p_server == NULL )
996 free( p_sys->p_cache );
1001 vlc_object_attach( p_server, p_tls );
1003 p_server->p_sys = p_sys;
1004 p_server->pf_delete = gnutls_ServerDelete;
1005 p_server->pf_add_CA = gnutls_ServerAddCA;
1006 p_server->pf_add_CRL = gnutls_ServerAddCRL;
1007 p_server->pf_session_prepare = gnutls_ServerSessionPrepare;
1009 /* No certificate validation by default */
1010 p_sys->pf_handshake2 = gnutls_ContinueHandshake;
1012 vlc_mutex_init( p_server, &p_sys->cache_lock );
1014 /* Sets server's credentials */
1015 val = gnutls_certificate_allocate_credentials( &p_sys->x509_cred );
1018 msg_Err( p_server, "cannot allocate X509 credentials: %s",
1019 gnutls_strerror( val ) );
1023 psz_local_cert = ToLocale( psz_cert_path );
1024 psz_local_key = ToLocale( psz_key_path );
1025 val = gnutls_certificate_set_x509_key_file( p_sys->x509_cred,
1026 psz_local_cert, psz_local_key,
1027 GNUTLS_X509_FMT_PEM );
1028 LocaleFree( psz_cert_path );
1029 LocaleFree( psz_key_path );
1032 msg_Err( p_server, "cannot set certificate chain or private key: %s",
1033 gnutls_strerror( val ) );
1034 gnutls_certificate_free_credentials( p_sys->x509_cred );
1039 * - regenerate these regularly
1040 * - support other ciper suites
1042 val = gnutls_dh_params_init( &p_sys->dh_params );
1045 msg_Dbg( p_server, "computing Diffie Hellman ciphers parameters" );
1046 val = gnutls_dh_params_generate2( p_sys->dh_params,
1047 config_GetInt( p_tls, "gnutls-dh-bits" ) );
1051 msg_Err( p_server, "cannot initialize DH cipher suites: %s",
1052 gnutls_strerror( val ) );
1053 gnutls_certificate_free_credentials( p_sys->x509_cred );
1056 msg_Dbg( p_server, "ciphers parameters computed" );
1058 gnutls_certificate_set_dh_params( p_sys->x509_cred, p_sys->dh_params);
1063 vlc_mutex_destroy( &p_sys->cache_lock );
1064 vlc_object_detach( p_server );
1065 vlc_object_destroy( p_server );
1071 #ifdef LIBVLC_USE_PTHREAD
1072 GCRY_THREAD_OPTION_PTHREAD_IMPL;
1073 # define gcry_threads_vlc gcry_threads_pthread
1076 * gcrypt thread option VLC implementation
1079 # define NEED_THREAD_CONTEXT 1
1080 static vlc_object_t *__p_gcry_data;
1082 static int gcry_vlc_mutex_init( void **p_sys )
1085 vlc_mutex_t *p_lock = (vlc_mutex_t *)malloc( sizeof( vlc_mutex_t ) );
1090 i_val = vlc_mutex_init( __p_gcry_data, p_lock );
1098 static int gcry_vlc_mutex_destroy( void **p_sys )
1101 vlc_mutex_t *p_lock = (vlc_mutex_t *)*p_sys;
1103 i_val = vlc_mutex_destroy( p_lock );
1108 static int gcry_vlc_mutex_lock( void **p_sys )
1110 return vlc_mutex_lock( (vlc_mutex_t *)*p_sys );
1113 static int gcry_vlc_mutex_unlock( void **lock )
1115 return vlc_mutex_unlock( (vlc_mutex_t *)*lock );
1118 static struct gcry_thread_cbs gcry_threads_vlc =
1120 GCRY_THREAD_OPTION_USER,
1122 gcry_vlc_mutex_init,
1123 gcry_vlc_mutex_destroy,
1124 gcry_vlc_mutex_lock,
1125 gcry_vlc_mutex_unlock
1130 /*****************************************************************************
1131 * Module initialization
1132 *****************************************************************************/
1134 Open( vlc_object_t *p_this )
1136 tls_t *p_tls = (tls_t *)p_this;
1138 vlc_value_t lock, count;
1140 var_Create( p_this->p_libvlc_global, "gnutls_mutex", VLC_VAR_MUTEX );
1141 var_Get( p_this->p_libvlc_global, "gnutls_mutex", &lock );
1142 vlc_mutex_lock( lock.p_address );
1144 /* Initialize GnuTLS only once */
1145 var_Create( p_this->p_libvlc_global, "gnutls_count", VLC_VAR_INTEGER );
1146 var_Get( p_this->p_libvlc_global, "gnutls_count", &count);
1148 if( count.i_int == 0)
1150 #ifdef NEED_THREAD_CONTEXT
1151 __p_gcry_data = VLC_OBJECT( p_this->p_libvlc );
1154 gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_vlc);
1155 if( gnutls_global_init( ) )
1157 msg_Warn( p_this, "cannot initialize GnuTLS" );
1158 vlc_mutex_unlock( lock.p_address );
1159 return VLC_EGENERIC;
1162 const char *psz_version = gnutls_check_version( "1.2.9" );
1163 if( psz_version == NULL )
1165 gnutls_global_deinit( );
1166 vlc_mutex_unlock( lock.p_address );
1167 msg_Err( p_this, "unsupported GnuTLS version" );
1168 return VLC_EGENERIC;
1170 msg_Dbg( p_this, "GnuTLS v%s initialized", psz_version );
1174 var_Set( p_this->p_libvlc_global, "gnutls_count", count);
1175 vlc_mutex_unlock( lock.p_address );
1177 p_tls->pf_server_create = gnutls_ServerCreate;
1178 p_tls->pf_client_create = gnutls_ClientCreate;
1183 /*****************************************************************************
1184 * Module deinitialization
1185 *****************************************************************************/
1187 Close( vlc_object_t *p_this )
1189 /*tls_t *p_tls = (tls_t *)p_this;
1190 tls_sys_t *p_sys = (tls_sys_t *)(p_this->p_sys);*/
1192 vlc_value_t lock, count;
1194 var_Create( p_this->p_libvlc_global, "gnutls_mutex", VLC_VAR_MUTEX );
1195 var_Get( p_this->p_libvlc_global, "gnutls_mutex", &lock );
1196 vlc_mutex_lock( lock.p_address );
1198 var_Create( p_this->p_libvlc_global, "gnutls_count", VLC_VAR_INTEGER );
1199 var_Get( p_this->p_libvlc_global, "gnutls_count", &count);
1201 var_Set( p_this->p_libvlc_global, "gnutls_count", count);
1203 if( count.i_int == 0 )
1205 gnutls_global_deinit( );
1206 msg_Dbg( p_this, "GnuTLS deinitialized" );
1209 vlc_mutex_unlock( lock.p_address );