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 typedef struct saved_session_t
116 char id[MAX_SESSION_ID];
117 char data[MAX_SESSION_DATA];
124 typedef struct tls_server_sys_t
126 gnutls_certificate_credentials x509_cred;
127 gnutls_dh_params dh_params;
129 struct saved_session_t *p_cache;
130 struct saved_session_t *p_store;
132 vlc_mutex_t cache_lock;
134 int (*pf_handshake2)( tls_session_t * );
138 typedef struct tls_session_sys_t
140 gnutls_session session;
142 vlc_bool_t b_handshaked;
146 typedef struct tls_client_sys_t
148 struct tls_session_sys_t session;
149 gnutls_certificate_credentials x509_cred;
154 * Sends data through a TLS session.
157 gnutls_Send( void *p_session, const void *buf, int i_length )
160 tls_session_sys_t *p_sys;
162 p_sys = (tls_session_sys_t *)(((tls_session_t *)p_session)->p_sys);
164 val = gnutls_record_send( p_sys->session, buf, i_length );
165 /* TODO: handle fatal error */
166 return val < 0 ? -1 : val;
171 * Receives data through a TLS session.
174 gnutls_Recv( void *p_session, 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_recv( p_sys->session, buf, i_length );
182 /* TODO: handle fatal error */
183 return val < 0 ? -1 : val;
187 /*****************************************************************************
188 * tls_Session(Continue)?Handshake:
189 *****************************************************************************
190 * Establishes TLS session with a peer through socket <fd>.
191 * Returns -1 on error (you need not and must not call tls_SessionClose)
192 * 0 on succesful handshake completion, 1 if more would-be blocking recv is
193 * needed, 2 if more would-be blocking send is required.
194 *****************************************************************************/
196 gnutls_ContinueHandshake( tls_session_t *p_session)
198 tls_session_sys_t *p_sys;
201 p_sys = (tls_session_sys_t *)(p_session->p_sys);
203 /* TODO: handle fatal error */
205 WSASetLastError( 0 );
207 val = gnutls_handshake( p_sys->session );
208 if( ( val == GNUTLS_E_AGAIN ) || ( val == GNUTLS_E_INTERRUPTED ) )
209 return 1 + gnutls_record_get_direction( p_sys->session );
214 msg_Dbg( p_session, "Winsock error %d", WSAGetLastError( ) );
216 msg_Err( p_session, "TLS handshake failed: %s",
217 gnutls_strerror( val ) );
218 p_session->pf_close( p_session );
222 p_sys->b_handshaked = VLC_TRUE;
233 static const error_msg_t cert_errors[] =
235 { GNUTLS_CERT_INVALID,
236 "Certificate could not be verified" },
237 { GNUTLS_CERT_REVOKED,
238 "Certificate was revoked" },
239 { GNUTLS_CERT_SIGNER_NOT_FOUND,
240 "Certificate's signer was not found" },
241 { GNUTLS_CERT_SIGNER_NOT_CA,
242 "Certificate's signer is not a CA" },
243 { GNUTLS_CERT_INSECURE_ALGORITHM,
244 "Insecure certificate signature algorithm" },
250 gnutls_HandshakeAndValidate( tls_session_t *session )
252 int val = gnutls_ContinueHandshake( session );
256 tls_session_sys_t *p_sys = (tls_session_sys_t *)(session->p_sys);
258 /* certificates chain verification */
260 val = gnutls_certificate_verify_peers2( p_sys->session, &status );
264 msg_Err( session, "Certificate verification failed: %s",
265 gnutls_strerror( val ) );
271 msg_Err( session, "TLS session: access denied" );
272 for( const error_msg_t *e = cert_errors; e->flag; e++ )
274 if( status & e->flag )
276 msg_Err( session, e->msg );
283 "unknown certificate error (you found a bug in VLC)" );
288 /* certificate (host)name verification */
289 const gnutls_datum *data = gnutls_certificate_get_peers( p_sys->session,
293 msg_Err( session, "Peer certificate not available" );
297 gnutls_x509_crt cert;
298 val = gnutls_x509_crt_init( &cert );
301 msg_Err( session, "x509 fatal error: %s", gnutls_strerror( val ) );
305 val = gnutls_x509_crt_import( cert, data, GNUTLS_X509_FMT_DER );
308 msg_Err( session, "Certificate import error: %s",
309 gnutls_strerror( val ) );
310 gnutls_x509_crt_deinit( cert );
314 if( p_sys->psz_hostname != NULL )
316 if ( !gnutls_x509_crt_check_hostname( cert, p_sys->psz_hostname ) )
318 msg_Err( session, "Certificate does not match \"%s\"",
319 p_sys->psz_hostname );
324 msg_Warn( session, "Certificate and hostname were not verified" );
326 if( gnutls_x509_crt_get_expiration_time( cert ) < time( NULL ) )
328 msg_Err( session, "Certificate expired" );
332 if( gnutls_x509_crt_get_activation_time( cert ) > time ( NULL ) )
334 msg_Err( session, "Certificate not yet valid" );
338 gnutls_x509_crt_deinit( cert );
339 msg_Dbg( session, "TLS/x509 certificate verified" );
343 gnutls_x509_crt_deinit( cert );
345 session->pf_close( session );
350 * Starts negociation of a TLS session.
352 * @param fd stream socket already connected with the peer.
353 * @param psz_hostname if not NULL, hostname to mention as a Server Name.
355 * @return -1 on error (you need not and must not call tls_SessionClose),
356 * 0 on succesful handshake completion, 1 if more would-be blocking recv is
357 * needed, 2 if more would-be blocking send is required.
360 gnutls_BeginHandshake( tls_session_t *p_session, int fd,
361 const char *psz_hostname )
363 tls_session_sys_t *p_sys;
365 p_sys = (tls_session_sys_t *)(p_session->p_sys);
367 gnutls_transport_set_ptr (p_sys->session, (gnutls_transport_ptr)(intptr_t)fd);
369 if( psz_hostname != NULL )
371 gnutls_server_name_set( p_sys->session, GNUTLS_NAME_DNS, psz_hostname,
372 strlen( psz_hostname ) );
373 if (var_CreateGetBool (p_session, "tls-check-hostname"))
375 p_sys->psz_hostname = strdup( psz_hostname );
376 if( p_sys->psz_hostname == NULL )
378 p_session->pf_close( p_session );
384 return p_session->pf_handshake2( p_session );
388 * Terminates TLS session and releases session data.
389 * You still have to close the socket yourself.
392 gnutls_SessionClose( tls_session_t *p_session )
394 tls_session_sys_t *p_sys;
396 p_sys = (tls_session_sys_t *)(p_session->p_sys);
398 if( p_sys->b_handshaked == VLC_TRUE )
399 gnutls_bye( p_sys->session, GNUTLS_SHUT_WR );
400 gnutls_deinit( p_sys->session );
402 if( p_sys->psz_hostname != NULL )
403 free( p_sys->psz_hostname );
405 vlc_object_detach( p_session );
406 vlc_object_destroy( p_session );
412 typedef int (*tls_prio_func) (gnutls_session_t, const int *);
415 gnutls_SetPriority (vlc_object_t *restrict obj, const char *restrict name,
416 tls_prio_func func, gnutls_session_t session,
417 const int *restrict values)
419 int val = func (session, values);
422 msg_Err (obj, "cannot set %s priorities: %s", name,
423 gnutls_strerror (val));
431 gnutls_SessionPrioritize (vlc_object_t *obj, gnutls_session_t session)
433 /* Note that ordering matters (on the client side) */
434 static const int protos[] =
441 static const int comps[] =
447 static const int macs[] =
450 GNUTLS_MAC_RMD160, // RIPEMD
456 static const int ciphers[] =
458 GNUTLS_CIPHER_AES_256_CBC,
459 GNUTLS_CIPHER_AES_128_CBC,
460 GNUTLS_CIPHER_3DES_CBC,
461 GNUTLS_CIPHER_ARCFOUR_128,
462 //GNUTLS_CIPHER_DES_CBC,
463 //GNUTLS_CIPHER_ARCFOUR_40,
464 //GNUTLS_CIPHER_RC2_40_CBC,
465 //GNUTLS_CIPHER_NULL,
468 static const int cert_types[] =
471 //GNUTLS_CRT_OPENPGP, TODO
475 int val = gnutls_set_default_priority (session);
478 msg_Err (obj, "cannot set default TLS priorities: %s",
479 gnutls_strerror (val));
483 if (gnutls_SetPriority (obj, "protocols",
484 gnutls_protocol_set_priority, session, protos)
485 || gnutls_SetPriority (obj, "compressions",
486 gnutls_compression_set_priority, session, comps)
487 || gnutls_SetPriority (obj, "MAC",
488 gnutls_mac_set_priority, session, macs)
489 || gnutls_SetPriority (obj, "ciphers",
490 gnutls_cipher_set_priority, session, ciphers)
491 || gnutls_SetPriority (obj, "certificate types",
492 gnutls_certificate_type_set_priority, session,
501 gnutls_ClientDelete( tls_session_t *p_session )
503 /* On the client-side, credentials are re-allocated per session */
504 gnutls_certificate_credentials x509_cred =
505 ((tls_client_sys_t *)(p_session->p_sys))->x509_cred;
507 gnutls_SessionClose( p_session );
509 /* credentials must be free'd *after* gnutls_deinit() */
510 gnutls_certificate_free_credentials( x509_cred );
515 gnutls_Addx509File( vlc_object_t *p_this,
516 gnutls_certificate_credentials cred,
517 const char *psz_path, vlc_bool_t b_priv );
520 gnutls_Addx509Directory( vlc_object_t *p_this,
521 gnutls_certificate_credentials cred,
522 const char *psz_dirname,
527 if( *psz_dirname == '\0' )
530 dir = utf8_opendir( psz_dirname );
533 msg_Warn( p_this, "cannot open directory (%s): %s", psz_dirname,
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 ) || utf8_lstat( psz_dirname, &st2 )
550 || S_ISLNK( st2.st_mode ) || ( st1.st_ino != st2.st_ino ) )
560 char *ent = utf8_readdir (dir);
564 if ((strcmp (ent, ".") == 0) || (strcmp (ent, "..") == 0))
567 char path[strlen (psz_dirname) + strlen (ent) + 2];
568 sprintf (path, "%s"DIR_SEP"%s", psz_dirname, ent);
571 gnutls_Addx509File( p_this, cred, path, b_priv );
580 gnutls_Addx509File( vlc_object_t *p_this,
581 gnutls_certificate_credentials cred,
582 const char *psz_path, vlc_bool_t b_priv )
586 if( utf8_stat( psz_path, &st ) == 0 )
588 if( S_ISREG( st.st_mode ) )
590 char *psz_localname = ToLocale( psz_path );
592 ? gnutls_certificate_set_x509_key_file( cred,
593 psz_localname, psz_localname, GNUTLS_X509_FMT_PEM )
594 : gnutls_certificate_set_x509_trust_file( cred,
595 psz_localname, GNUTLS_X509_FMT_PEM );
596 LocaleFree( psz_localname );
600 msg_Warn( p_this, "cannot add x509 credentials (%s): %s",
601 psz_path, gnutls_strerror( i ) );
606 msg_Dbg( p_this, "added x509 credentials (%s)",
611 else if( S_ISDIR( st.st_mode ) )
614 "looking recursively for x509 credentials in %s",
616 return gnutls_Addx509Directory( p_this, cred, psz_path, b_priv);
620 msg_Warn( p_this, "cannot add x509 credentials (%s): %s",
621 psz_path, strerror( errno ) );
627 * Initializes a client-side TLS session.
629 static tls_session_t *
630 gnutls_ClientCreate( tls_t *p_tls )
632 tls_session_t *p_session = NULL;
633 tls_client_sys_t *p_sys = NULL;
636 p_sys = (tls_client_sys_t *)malloc( sizeof(struct tls_client_sys_t) );
640 p_session = (struct tls_session_t *)vlc_object_create ( p_tls, sizeof(struct tls_session_t) );
641 if( p_session == NULL )
647 p_session->p_sys = p_sys;
648 p_session->sock.p_sys = p_session;
649 p_session->sock.pf_send = gnutls_Send;
650 p_session->sock.pf_recv = gnutls_Recv;
651 p_session->pf_handshake = gnutls_BeginHandshake;
652 p_session->pf_close = gnutls_ClientDelete;
654 p_sys->session.b_handshaked = VLC_FALSE;
655 p_sys->session.psz_hostname = NULL;
657 vlc_object_attach( p_session, p_tls );
659 const char *homedir = p_tls->p_libvlc->psz_homedir,
660 *datadir = config_GetDataDir ((vlc_object_t *)p_session);
661 size_t l1 = strlen (homedir), l2 = strlen (datadir);
662 char path[((l1 > l2) ? l1 : l2) + sizeof ("/"CONFIG_DIR"/ssl/private")];
663 // > sizeof ("/"CONFIG_DIR"/ssl/certs")
664 // > sizeof ("/ca-certificates.crt")
666 i_val = gnutls_certificate_allocate_credentials( &p_sys->x509_cred );
669 msg_Err( p_tls, "cannot allocate X509 credentials: %s",
670 gnutls_strerror( i_val ) );
674 if (var_CreateGetBool (p_tls, "tls-check-cert"))
676 sprintf (path, "%s/"CONFIG_DIR"/ssl/certs", homedir);
677 gnutls_Addx509Directory ((vlc_object_t *)p_session,
678 p_sys->x509_cred, path, VLC_FALSE);
680 sprintf (path, "%s/ca-certificates.crt", datadir);
681 gnutls_Addx509File ((vlc_object_t *)p_session,
682 p_sys->x509_cred, path, VLC_FALSE);
683 p_session->pf_handshake2 = gnutls_HandshakeAndValidate;
686 p_session->pf_handshake2 = gnutls_ContinueHandshake;
688 sprintf (path, "%s/"CONFIG_DIR"/ssl/private", homedir);
689 gnutls_Addx509Directory ((vlc_object_t *)p_session, p_sys->x509_cred,
692 i_val = gnutls_init( &p_sys->session.session, GNUTLS_CLIENT );
695 msg_Err( p_tls, "cannot initialize TLS session: %s",
696 gnutls_strerror( i_val ) );
697 gnutls_certificate_free_credentials( p_sys->x509_cred );
701 if (gnutls_SessionPrioritize (VLC_OBJECT (p_session),
702 p_sys->session.session))
705 i_val = gnutls_credentials_set( p_sys->session.session,
706 GNUTLS_CRD_CERTIFICATE,
710 msg_Err( p_tls, "cannot set TLS session credentials: %s",
711 gnutls_strerror( i_val ) );
718 gnutls_deinit( p_sys->session.session );
719 gnutls_certificate_free_credentials( p_sys->x509_cred );
722 vlc_object_detach( p_session );
723 vlc_object_destroy( p_session );
731 * TLS session resumption callbacks (server-side)
733 static int cb_store( void *p_server, gnutls_datum key, gnutls_datum data )
735 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
737 if( ( p_sys->i_cache_size == 0 )
738 || ( key.size > MAX_SESSION_ID )
739 || ( data.size > MAX_SESSION_DATA ) )
742 vlc_mutex_lock( &p_sys->cache_lock );
744 memcpy( p_sys->p_store->id, key.data, key.size);
745 memcpy( p_sys->p_store->data, data.data, data.size );
746 p_sys->p_store->i_idlen = key.size;
747 p_sys->p_store->i_datalen = data.size;
750 if( ( p_sys->p_store - p_sys->p_cache ) == p_sys->i_cache_size )
751 p_sys->p_store = p_sys->p_cache;
753 vlc_mutex_unlock( &p_sys->cache_lock );
759 static const gnutls_datum err_datum = { NULL, 0 };
761 static gnutls_datum cb_fetch( void *p_server, gnutls_datum key )
763 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
764 saved_session_t *p_session, *p_end;
766 p_session = p_sys->p_cache;
767 p_end = p_session + p_sys->i_cache_size;
769 vlc_mutex_lock( &p_sys->cache_lock );
771 while( p_session < p_end )
773 if( ( p_session->i_idlen == key.size )
774 && !memcmp( p_session->id, key.data, key.size ) )
778 data.size = p_session->i_datalen;
780 data.data = gnutls_malloc( data.size );
781 if( data.data == NULL )
783 vlc_mutex_unlock( &p_sys->cache_lock );
787 memcpy( data.data, p_session->data, data.size );
788 vlc_mutex_unlock( &p_sys->cache_lock );
794 vlc_mutex_unlock( &p_sys->cache_lock );
800 static int cb_delete( void *p_server, gnutls_datum key )
802 tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
803 saved_session_t *p_session, *p_end;
805 p_session = p_sys->p_cache;
806 p_end = p_session + p_sys->i_cache_size;
808 vlc_mutex_lock( &p_sys->cache_lock );
810 while( p_session < p_end )
812 if( ( p_session->i_idlen == key.size )
813 && !memcmp( p_session->id, key.data, key.size ) )
815 p_session->i_datalen = p_session->i_idlen = 0;
816 vlc_mutex_unlock( &p_sys->cache_lock );
822 vlc_mutex_unlock( &p_sys->cache_lock );
829 * Initializes a server-side TLS session.
831 static tls_session_t *
832 gnutls_ServerSessionPrepare( tls_server_t *p_server )
834 tls_session_t *p_session;
835 tls_server_sys_t *p_server_sys;
836 gnutls_session session;
839 p_session = vlc_object_create( p_server, sizeof (struct tls_session_t) );
840 if( p_session == NULL )
843 p_session->p_sys = malloc( sizeof(struct tls_session_sys_t) );
844 if( p_session->p_sys == NULL )
846 vlc_object_destroy( p_session );
850 vlc_object_attach( p_session, p_server );
852 p_server_sys = (tls_server_sys_t *)p_server->p_sys;
853 p_session->sock.p_sys = p_session;
854 p_session->sock.pf_send = gnutls_Send;
855 p_session->sock.pf_recv = gnutls_Recv;
856 p_session->pf_handshake = gnutls_BeginHandshake;
857 p_session->pf_handshake2 = p_server_sys->pf_handshake2;
858 p_session->pf_close = gnutls_SessionClose;
860 ((tls_session_sys_t *)p_session->p_sys)->b_handshaked = VLC_FALSE;
861 ((tls_session_sys_t *)p_session->p_sys)->psz_hostname = NULL;
863 i_val = gnutls_init( &session, GNUTLS_SERVER );
866 msg_Err( p_server, "cannot initialize TLS session: %s",
867 gnutls_strerror( i_val ) );
871 ((tls_session_sys_t *)p_session->p_sys)->session = session;
873 i_val = gnutls_set_default_priority( session );
874 if (gnutls_SessionPrioritize (VLC_OBJECT (p_session), session))
876 gnutls_deinit( session );
880 i_val = gnutls_credentials_set( session, GNUTLS_CRD_CERTIFICATE,
881 p_server_sys->x509_cred );
884 msg_Err( p_server, "cannot set TLS session credentials: %s",
885 gnutls_strerror( i_val ) );
886 gnutls_deinit( session );
890 if( p_session->pf_handshake2 == gnutls_HandshakeAndValidate )
891 gnutls_certificate_server_set_request( session, GNUTLS_CERT_REQUIRE );
893 i_val = config_GetInt (p_server, "gnutls-dh-bits");
894 gnutls_dh_set_prime_bits (session, i_val);
896 /* Session resumption support */
897 i_val = config_GetInt (p_server, "gnutls-cache-expiration");
898 gnutls_db_set_cache_expiration (session, i_val);
899 gnutls_db_set_retrieve_function( session, cb_fetch );
900 gnutls_db_set_remove_function( session, cb_delete );
901 gnutls_db_set_store_function( session, cb_store );
902 gnutls_db_set_ptr( session, p_server );
907 free( p_session->p_sys );
908 vlc_object_detach( p_session );
909 vlc_object_destroy( p_session );
915 * Releases data allocated with tls_ServerCreate().
918 gnutls_ServerDelete( tls_server_t *p_server )
920 tls_server_sys_t *p_sys;
921 p_sys = (tls_server_sys_t *)p_server->p_sys;
923 vlc_mutex_destroy( &p_sys->cache_lock );
924 free( p_sys->p_cache );
926 vlc_object_detach( p_server );
927 vlc_object_destroy( p_server );
929 /* all sessions depending on the server are now deinitialized */
930 gnutls_certificate_free_credentials( p_sys->x509_cred );
931 gnutls_dh_params_deinit( p_sys->dh_params );
937 * Adds one or more certificate authorities.
939 * @param psz_ca_path (Unicode) path to an x509 certificates list.
941 * @return -1 on error, 0 on success.
942 *****************************************************************************/
944 gnutls_ServerAddCA( tls_server_t *p_server, const char *psz_ca_path )
946 tls_server_sys_t *p_sys;
947 char *psz_local_path;
950 p_sys = (tls_server_sys_t *)(p_server->p_sys);
952 psz_local_path = ToLocale( psz_ca_path );
953 val = gnutls_certificate_set_x509_trust_file( p_sys->x509_cred,
955 GNUTLS_X509_FMT_PEM );
956 LocaleFree( psz_local_path );
959 msg_Err( p_server, "cannot add trusted CA (%s): %s", psz_ca_path,
960 gnutls_strerror( val ) );
963 msg_Dbg( p_server, " %d trusted CA added (%s)", val, psz_ca_path );
965 /* enables peer's certificate verification */
966 p_sys->pf_handshake2 = gnutls_HandshakeAndValidate;
973 * Adds a certificates revocation list to be sent to TLS clients.
975 * @param psz_crl_path (Unicode) path of the CRL file.
977 * @return -1 on error, 0 on success.
980 gnutls_ServerAddCRL( tls_server_t *p_server, const char *psz_crl_path )
983 char *psz_local_path = ToLocale( psz_crl_path );
985 val = gnutls_certificate_set_x509_crl_file( ((tls_server_sys_t *)
986 (p_server->p_sys))->x509_cred,
988 GNUTLS_X509_FMT_PEM );
989 LocaleFree( psz_crl_path );
992 msg_Err( p_server, "cannot add CRL (%s): %s", psz_crl_path,
993 gnutls_strerror( val ) );
996 msg_Dbg( p_server, "%d CRL added (%s)", val, psz_crl_path );
1002 * Allocates a whole server's TLS credentials.
1004 * @return NULL on error.
1006 static tls_server_t *
1007 gnutls_ServerCreate( tls_t *p_tls, const char *psz_cert_path,
1008 const char *psz_key_path )
1010 tls_server_t *p_server;
1011 tls_server_sys_t *p_sys;
1012 char *psz_local_key, *psz_local_cert;
1015 msg_Dbg( p_tls, "creating TLS server" );
1017 p_sys = (tls_server_sys_t *)malloc( sizeof(struct tls_server_sys_t) );
1021 p_sys->i_cache_size = config_GetInt (p_tls, "gnutls-cache-size");
1022 p_sys->p_cache = (struct saved_session_t *)calloc( p_sys->i_cache_size,
1023 sizeof( struct saved_session_t ) );
1024 if( p_sys->p_cache == NULL )
1029 p_sys->p_store = p_sys->p_cache;
1031 p_server = vlc_object_create( p_tls, sizeof(struct tls_server_t) );
1032 if( p_server == NULL )
1034 free( p_sys->p_cache );
1039 vlc_object_attach( p_server, p_tls );
1041 p_server->p_sys = p_sys;
1042 p_server->pf_delete = gnutls_ServerDelete;
1043 p_server->pf_add_CA = gnutls_ServerAddCA;
1044 p_server->pf_add_CRL = gnutls_ServerAddCRL;
1045 p_server->pf_session_prepare = gnutls_ServerSessionPrepare;
1047 /* No certificate validation by default */
1048 p_sys->pf_handshake2 = gnutls_ContinueHandshake;
1050 vlc_mutex_init( p_server, &p_sys->cache_lock );
1052 /* Sets server's credentials */
1053 val = gnutls_certificate_allocate_credentials( &p_sys->x509_cred );
1056 msg_Err( p_server, "cannot allocate X509 credentials: %s",
1057 gnutls_strerror( val ) );
1061 psz_local_cert = ToLocale( psz_cert_path );
1062 psz_local_key = ToLocale( psz_key_path );
1063 val = gnutls_certificate_set_x509_key_file( p_sys->x509_cred,
1064 psz_local_cert, psz_local_key,
1065 GNUTLS_X509_FMT_PEM );
1066 LocaleFree( psz_cert_path );
1067 LocaleFree( psz_key_path );
1070 msg_Err( p_server, "cannot set certificate chain or private key: %s",
1071 gnutls_strerror( val ) );
1072 gnutls_certificate_free_credentials( p_sys->x509_cred );
1077 * - regenerate these regularly
1078 * - support other ciper suites
1080 val = gnutls_dh_params_init( &p_sys->dh_params );
1083 msg_Dbg( p_server, "computing Diffie Hellman ciphers parameters" );
1084 val = gnutls_dh_params_generate2( p_sys->dh_params,
1085 config_GetInt( p_tls, "gnutls-dh-bits" ) );
1089 msg_Err( p_server, "cannot initialize DH cipher suites: %s",
1090 gnutls_strerror( val ) );
1091 gnutls_certificate_free_credentials( p_sys->x509_cred );
1094 msg_Dbg( p_server, "ciphers parameters computed" );
1096 gnutls_certificate_set_dh_params( p_sys->x509_cred, p_sys->dh_params);
1101 vlc_mutex_destroy( &p_sys->cache_lock );
1102 vlc_object_detach( p_server );
1103 vlc_object_destroy( p_server );
1109 #ifdef LIBVLC_USE_PTHREAD
1110 GCRY_THREAD_OPTION_PTHREAD_IMPL;
1111 # define gcry_threads_vlc gcry_threads_pthread
1114 * gcrypt thread option VLC implementation
1117 # define NEED_THREAD_CONTEXT 1
1118 static vlc_object_t *__p_gcry_data;
1120 static int gcry_vlc_mutex_init( void **p_sys )
1123 vlc_mutex_t *p_lock = (vlc_mutex_t *)malloc( sizeof( vlc_mutex_t ) );
1128 i_val = vlc_mutex_init( __p_gcry_data, p_lock );
1136 static int gcry_vlc_mutex_destroy( void **p_sys )
1139 vlc_mutex_t *p_lock = (vlc_mutex_t *)*p_sys;
1141 i_val = vlc_mutex_destroy( p_lock );
1146 static int gcry_vlc_mutex_lock( void **p_sys )
1148 return vlc_mutex_lock( (vlc_mutex_t *)*p_sys );
1151 static int gcry_vlc_mutex_unlock( void **lock )
1153 return vlc_mutex_unlock( (vlc_mutex_t *)*lock );
1156 static struct gcry_thread_cbs gcry_threads_vlc =
1158 GCRY_THREAD_OPTION_USER,
1160 gcry_vlc_mutex_init,
1161 gcry_vlc_mutex_destroy,
1162 gcry_vlc_mutex_lock,
1163 gcry_vlc_mutex_unlock
1168 /*****************************************************************************
1169 * Module initialization
1170 *****************************************************************************/
1172 Open( vlc_object_t *p_this )
1174 tls_t *p_tls = (tls_t *)p_this;
1176 vlc_value_t lock, count;
1178 var_Create( p_this->p_libvlc_global, "gnutls_mutex", VLC_VAR_MUTEX );
1179 var_Get( p_this->p_libvlc_global, "gnutls_mutex", &lock );
1180 vlc_mutex_lock( lock.p_address );
1182 /* Initialize GnuTLS only once */
1183 var_Create( p_this->p_libvlc_global, "gnutls_count", VLC_VAR_INTEGER );
1184 var_Get( p_this->p_libvlc_global, "gnutls_count", &count);
1186 if( count.i_int == 0)
1188 #ifdef NEED_THREAD_CONTEXT
1189 __p_gcry_data = VLC_OBJECT( p_this->p_libvlc );
1192 gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_vlc);
1193 if( gnutls_global_init( ) )
1195 msg_Warn( p_this, "cannot initialize GnuTLS" );
1196 vlc_mutex_unlock( lock.p_address );
1197 return VLC_EGENERIC;
1200 const char *psz_version = gnutls_check_version( "1.2.9" );
1201 if( psz_version == NULL )
1203 gnutls_global_deinit( );
1204 vlc_mutex_unlock( lock.p_address );
1205 msg_Err( p_this, "unsupported GnuTLS version" );
1206 return VLC_EGENERIC;
1208 msg_Dbg( p_this, "GnuTLS v%s initialized", psz_version );
1212 var_Set( p_this->p_libvlc_global, "gnutls_count", count);
1213 vlc_mutex_unlock( lock.p_address );
1215 p_tls->pf_server_create = gnutls_ServerCreate;
1216 p_tls->pf_client_create = gnutls_ClientCreate;
1221 /*****************************************************************************
1222 * Module deinitialization
1223 *****************************************************************************/
1225 Close( vlc_object_t *p_this )
1227 /*tls_t *p_tls = (tls_t *)p_this;
1228 tls_sys_t *p_sys = (tls_sys_t *)(p_this->p_sys);*/
1230 vlc_value_t lock, count;
1232 var_Create( p_this->p_libvlc_global, "gnutls_mutex", VLC_VAR_MUTEX );
1233 var_Get( p_this->p_libvlc_global, "gnutls_mutex", &lock );
1234 vlc_mutex_lock( lock.p_address );
1236 var_Create( p_this->p_libvlc_global, "gnutls_count", VLC_VAR_INTEGER );
1237 var_Get( p_this->p_libvlc_global, "gnutls_count", &count);
1239 var_Set( p_this->p_libvlc_global, "gnutls_count", count);
1241 if( count.i_int == 0 )
1243 gnutls_global_deinit( );
1244 msg_Dbg( p_this, "GnuTLS deinitialized" );
1247 vlc_mutex_unlock( lock.p_address );