1 /*****************************************************************************
2 * remoteosd.c: remote osd over vnc filter module
3 *****************************************************************************
4 * Copyright (C) 2007-2008 Matthias Bauer
7 * Authors: Matthias Bauer <matthias dot bauer #_at_# gmx dot ch>
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 implid 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 /*****************************************************************************
25 * RemoteOSD uses the RFB-Protocol of VNC to display an On-Screen-Display
26 * menu generated by a streaming server as overlay for the streamed video.
28 * The streaming server that implements this is the ffnetdev plugin for VDR.
29 * VDR (VideoDiskRecorder) is an Linux based OpenSource harddisk recorder
31 * The VDR ffnetdev plugin emulates the hardware MPEG decoder and streams the
32 * video over the network instead of hardware video outputs.
33 * The OSD menu of VDR is offered with the RFB protocol to a VNC client.
35 * In fact this video-filter is a simple VNC client that could be also used to
36 * connect to a real VNC host.
37 * Only 8-bit color is supported at the moment.
38 * Using password protected VNC hosts is supported but not recommended, because
39 * you need to insert the used password in the plugin configuration page of
40 * VLC configuration in plain text and it's saved in plain text.
41 *****************************************************************************/
45 /*****************************************************************************
47 *****************************************************************************/
53 #include <vlc_common.h>
54 #include <vlc_plugin.h>
57 #include <vlc_filter.h>
58 #include "filter_common.h"
59 #include <vlc_image.h>
63 #include <vlc_network.h>
64 #include <gcrypt.h> /* to encrypt password */
65 #include <vlc_gcrypt.h>
67 #include "remoteosd_rfbproto.h" /* type definitions of the RFB protocol for VNC */
69 /*****************************************************************************
71 *****************************************************************************/
72 #define READ_BUFFER_SIZE 1000000
74 #define RMTOSD_HOST_TEXT N_("VNC Host")
75 #define RMTOSD_HOST_LONGTEXT N_( \
76 "VNC hostname or IP address." )
78 #define RMTOSD_PORT_TEXT N_("VNC Port")
79 #define RMTOSD_PORT_LONGTEXT N_( \
82 #define RMTOSD_PASSWORD_TEXT N_("VNC Password")
83 #define RMTOSD_PASSWORD_LONGTEXT N_( \
86 #define RMTOSD_UPDATE_TEXT N_("VNC poll interval" )
87 #define RMTOSD_UPDATE_LONGTEXT N_( \
88 "In this interval an update from VNC is requested, default every 300 ms. ")
90 #define RMTOSD_POLL_TEXT N_("VNC polling")
91 #define RMTOSD_POLL_LONGTEXT N_( \
92 "Activate VNC polling. Do NOT activate for use as VDR ffnetdev client." )
94 #define RMTOSD_MOUSE_TEXT N_("Mouse events")
95 #define RMTOSD_MOUSE_LONGTEXT N_( \
96 "Send mouse events to VNC host. Not needed for use as VDR ffnetdev client." )
98 #define RMTOSD_KEYS_TEXT N_("Key events")
99 #define RMTOSD_KEYS_LONGTEXT N_( \
100 "Send key events to VNC host." )
102 #define RMTOSD_ALPHA_TEXT N_("Alpha transparency value (default 255)")
103 #define RMTOSD_ALPHA_LONGTEXT N_( \
104 "The transparency of the OSD VNC can be changed by giving a value " \
105 "between 0 and 255. A lower value specifies more transparency a higher " \
106 "means less transparency. The default is being not transparent " \
107 "(value 255) the minimum is fully transparent (value 0)." )
109 #define RMTOSD_CFG "rmtosd-"
111 #define RMTOSD_UPDATE_MIN 200
112 #define RMTOSD_UPDATE_DEFAULT 1000
113 #define RMTOSD_UPDATE_MAX 300
115 static int CreateFilter ( vlc_object_t * );
116 static void DestroyFilter( vlc_object_t * );
119 set_description( N_("Remote-OSD over VNC") )
120 set_capability( "sub filter", 100 )
121 set_shortname( N_("Remote-OSD") )
122 set_category( CAT_VIDEO )
123 set_subcategory( SUBCAT_VIDEO_SUBPIC )
124 add_shortcut( "rmtosd" )
125 set_callbacks( CreateFilter, DestroyFilter )
127 add_string( RMTOSD_CFG "host", "myvdr", NULL, RMTOSD_HOST_TEXT,
128 RMTOSD_HOST_LONGTEXT, false )
129 add_integer_with_range( RMTOSD_CFG "port", 20001, 1, 0xFFFF, NULL,
130 RMTOSD_PORT_TEXT, RMTOSD_PORT_LONGTEXT, false )
131 add_password( RMTOSD_CFG "password", "", NULL, RMTOSD_PASSWORD_TEXT,
132 RMTOSD_PASSWORD_LONGTEXT, false )
133 add_integer_with_range( RMTOSD_CFG "update", RMTOSD_UPDATE_DEFAULT,
134 RMTOSD_UPDATE_MIN, RMTOSD_UPDATE_MAX, NULL, RMTOSD_UPDATE_TEXT,
135 RMTOSD_UPDATE_LONGTEXT, true )
136 add_bool( RMTOSD_CFG "vnc-polling", false, NULL,
137 RMTOSD_POLL_TEXT , RMTOSD_POLL_LONGTEXT, false )
138 add_bool( RMTOSD_CFG "mouse-events", false, NULL,
139 RMTOSD_MOUSE_TEXT , RMTOSD_MOUSE_LONGTEXT, false )
140 add_bool( RMTOSD_CFG "key-events", false, NULL,
141 RMTOSD_KEYS_TEXT , RMTOSD_KEYS_LONGTEXT, false )
142 add_integer_with_range( RMTOSD_CFG "alpha", 255, 0, 255, NULL,
143 RMTOSD_ALPHA_TEXT, RMTOSD_ALPHA_LONGTEXT, true )
148 /*****************************************************************************
150 *****************************************************************************/
151 #define CHALLENGESIZE 16
152 #define MAX_VNC_SERVER_NAME_LENGTH 255
154 /* subfilter functions */
155 static subpicture_t *Filter( filter_t *, mtime_t );
157 static int MouseEvent ( vlc_object_t *p_this, char const *psz_var,
158 vlc_value_t oldval, vlc_value_t newval, void *p_data );
160 static int KeyEvent( vlc_object_t *p_this, char const *psz_var,
161 vlc_value_t oldval, vlc_value_t newval, void *p_data );
163 static void stop_osdvnc ( filter_t *p_filter );
165 static void* vnc_worker_thread ( vlc_object_t *p_thread_obj );
167 static void* update_request_thread( vlc_object_t *p_thread_obj );
169 static bool open_vnc_connection ( filter_t *p_filter );
171 static bool handshaking ( filter_t *p_filter );
173 static bool process_server_message ( filter_t *p_filter,
174 rfbServerToClientMsg *msg );
176 static inline void rgb_to_yuv( uint8_t *y, uint8_t *u, uint8_t *v,
177 int r, int g, int b );
179 static inline bool fill_rect( filter_sys_t* p_sys,
180 uint16_t i_x, uint16_t i_y,
181 uint16_t i_w, uint16_t i_h,
183 static inline bool copy_rect( filter_sys_t* p_sys,
184 uint16_t i_x, uint16_t i_y,
185 uint16_t i_w, uint16_t i_h,
186 uint16_t i_sx, uint16_t i_sy );
189 static inline bool raw_line( filter_sys_t* p_sys,
190 uint16_t i_x, uint16_t i_y,
193 static void vnc_encrypt_bytes( unsigned char *bytes, char *passwd );
196 /*****************************************************************************
198 *****************************************************************************/
200 /*****************************************************************************
202 *****************************************************************************/
205 bool b_need_update; /* VNC picture is updated, do update the OSD*/
206 mtime_t i_vnc_poll_interval; /* Update the OSD menu every n ms */
208 uint8_t i_alpha; /* alpha transparency value */
210 char *psz_host; /* VNC host */
213 char *psz_passwd; /* VNC password */
215 bool b_vnc_poll; /* Activate VNC polling ? */
216 bool b_vnc_mouse_events; /* Send MouseEvents ? */
217 bool b_vnc_key_events; /* Send KeyEvents ? */
219 bool b_connection_active; /* Handshaking finished ? */
221 vlc_mutex_t lock; /* To lock for read/write on picture */
223 picture_t *p_pic; /* The picture with OSD data from VNC */
225 vout_thread_t *p_vout; /* Pointer to video-out thread */
227 int i_socket; /* Socket used for VNC */
229 uint16_t i_vnc_width; /* The with of the VNC screen */
230 uint16_t i_vnc_height; /* The height of the VNC screen */
231 uint32_t i_vnc_pixels; /* The pixels of the VNC screen */
233 bool b_alpha_from_vnc; /* Special ffnetdev alpha feature enabled ? */
235 char read_buffer[READ_BUFFER_SIZE];
239 vlc_object_t* p_worker_thread;
241 uint8_t ar_color_table_yuv[256][4];
244 /*****************************************************************************
245 * CreateFilter: Create the filter and open the definition file
246 *****************************************************************************/
247 static int CreateFilter ( vlc_object_t *p_this )
249 filter_t *p_filter = (filter_t *)p_this;
250 filter_sys_t *p_sys = NULL;
252 msg_Dbg( p_filter, "Creating vnc osd filter..." );
254 p_filter->p_sys = p_sys = calloc( 1, sizeof(*p_sys) );
255 if( !p_filter->p_sys )
258 /* Populating struct */
259 vlc_mutex_init( &p_sys->lock );
260 p_sys->b_continue = true;
261 p_sys->i_socket = -1;
264 p_sys->psz_host = var_CreateGetString( p_this, RMTOSD_CFG "host" );
265 if( EMPTY_STR(p_sys->psz_host) )
267 msg_Err( p_filter, "unable to get vnc host" );
271 p_sys->psz_passwd = var_CreateGetString( p_this, RMTOSD_CFG "password" );
272 if( !p_sys->psz_passwd )
274 msg_Err( p_filter, "unable to get vnc password" );
278 p_sys->i_port = var_CreateGetIntegerCommand( p_this, RMTOSD_CFG "port" );
280 p_sys->i_alpha = var_CreateGetIntegerCommand( p_this, RMTOSD_CFG "alpha" );
282 /* in milliseconds, 0 disables polling, should not be lower than 100 */
283 p_sys->i_vnc_poll_interval = var_CreateGetIntegerCommand( p_this,
284 RMTOSD_CFG "update" );
285 if ( p_sys->i_vnc_poll_interval < 100)
287 p_sys->i_vnc_poll_interval = 100;
290 for ( int i = 0; i < 256; i++ )
292 p_sys->ar_color_table_yuv[i][0] = 255;
293 p_sys->ar_color_table_yuv[i][1] = 255;
294 p_sys->ar_color_table_yuv[i][2] = 255;
295 p_sys->ar_color_table_yuv[i][3] = 255;
298 p_sys->b_vnc_poll = var_CreateGetBoolCommand( p_this,
299 RMTOSD_CFG "vnc-polling" );
300 p_sys->b_vnc_mouse_events = var_CreateGetBoolCommand( p_this,
301 RMTOSD_CFG "mouse-events" );
302 p_sys->b_vnc_key_events = var_CreateGetBoolCommand( p_this,
303 RMTOSD_CFG "key-events" );
305 /* Keep track of OSD Events */
306 p_sys->b_need_update = false;
308 /* Attach subpicture filter callback */
309 p_filter->pf_sub_filter = Filter;
311 p_sys->p_vout = vlc_object_find( p_this, VLC_OBJECT_VOUT, FIND_PARENT );
315 var_AddCallback( p_sys->p_vout, "mouse-moved",
316 MouseEvent, p_this );
317 var_AddCallback( p_sys->p_vout, "mouse-button-down",
318 MouseEvent, p_this );
319 var_AddCallback( p_sys->p_vout->p_libvlc, "key-pressed",
323 es_format_Init( &p_filter->fmt_out, SPU_ES, VLC_CODEC_SPU );
324 p_filter->fmt_out.i_priority = 0;
328 /* create the vnc worker thread */
329 p_sys->p_worker_thread = vlc_object_create( p_this,
330 sizeof( vlc_object_t ) );
331 vlc_object_attach( p_sys->p_worker_thread, p_this );
332 if( vlc_thread_create( p_sys->p_worker_thread, "vnc worker thread",
333 vnc_worker_thread, VLC_THREAD_PRIORITY_LOW ) )
335 vlc_object_release( p_sys->p_worker_thread );
336 msg_Err( p_filter, "cannot spawn vnc message reader thread" );
340 msg_Dbg( p_filter, "osdvnc filter started" );
345 msg_Err( p_filter, "osdvnc filter discarded" );
347 stop_osdvnc( p_filter );
349 vlc_mutex_destroy( &p_sys->lock );
350 free( p_sys->psz_host );
351 free( p_sys->psz_passwd );
357 /*****************************************************************************
358 * DestroyFilter: Make a clean exit of this plugin
359 *****************************************************************************/
360 static void DestroyFilter( vlc_object_t *p_this )
362 filter_t *p_filter = (filter_t*)p_this;
363 filter_sys_t *p_sys = p_filter->p_sys;
365 msg_Dbg( p_filter, "DestroyFilter called." );
367 stop_osdvnc( p_filter );
371 var_DelCallback( p_sys->p_vout, "mouse-moved",
372 MouseEvent, p_this );
373 var_DelCallback( p_sys->p_vout, "mouse-button-down",
374 MouseEvent, p_this );
375 var_DelCallback( p_sys->p_vout->p_libvlc, "key-pressed",
378 vlc_object_release( p_sys->p_vout );
381 var_Destroy( p_this, RMTOSD_CFG "host" );
382 var_Destroy( p_this, RMTOSD_CFG "port" );
383 var_Destroy( p_this, RMTOSD_CFG "password" );
384 var_Destroy( p_this, RMTOSD_CFG "update" );
385 var_Destroy( p_this, RMTOSD_CFG "vnc-polling" );
386 var_Destroy( p_this, RMTOSD_CFG "mouse-events" );
387 var_Destroy( p_this, RMTOSD_CFG "key-events" );
388 var_Destroy( p_this, RMTOSD_CFG "alpha" );
390 vlc_mutex_destroy( &p_sys->lock );
391 free( p_sys->psz_host );
392 free( p_sys->psz_passwd );
396 static void stop_osdvnc ( filter_t *p_filter )
398 filter_sys_t *p_sys = p_filter->p_sys;
400 /* It will unlock socket reading */
401 vlc_object_kill( p_filter );
404 if( p_sys->p_worker_thread )
406 msg_Dbg( p_filter, "joining worker_thread" );
407 vlc_object_kill( p_sys->p_worker_thread );
408 vlc_thread_join( p_sys->p_worker_thread );
409 vlc_object_release( p_sys->p_worker_thread );
410 msg_Dbg( p_filter, "released worker_thread" );
413 msg_Dbg( p_filter, "osdvnc stopped" );
416 static bool read_exact( filter_t *p_filter,
421 return i_bytes == net_Read( p_filter, i_socket, NULL,
422 (unsigned char*)p_readbuf,
427 static bool write_exact( filter_t *p_filter,
432 return i_bytes == net_Write( p_filter, i_socket, NULL,
433 (unsigned char*)p_writebuf, i_bytes );
436 static bool open_vnc_connection ( filter_t *p_filter )
438 filter_sys_t *p_sys = p_filter->p_sys;
440 msg_Dbg( p_filter, "Open socket to vnc server on %s:%u.",
441 p_sys->psz_host, p_sys->i_port );
443 p_sys->i_socket = net_ConnectTCP( p_filter, p_sys->psz_host, p_sys->i_port );
445 if( p_sys->i_socket < 0 )
447 msg_Err( p_filter, "Could not open socket" );
451 msg_Dbg( p_filter, "socket is open." );
456 static bool handshaking ( filter_t *p_filter )
458 filter_sys_t *p_sys = p_filter->p_sys;
460 msg_Dbg( p_filter, "Reading protocol version" );
462 rfbProtocolVersionMsg pv;
463 if ( !read_exact( p_filter, p_sys->i_socket, pv,
464 sz_rfbProtocolVersionMsg ) )
466 msg_Err( p_filter, "Could not read version message" );
469 pv[sz_rfbProtocolVersionMsg] = '\0'; /* pv size is sz_rfbProtocolVersionMsg+1 */
471 msg_Dbg( p_filter, "Server version is %s", pv );
473 strncpy(pv, "RFB 003.003\n", sz_rfbProtocolVersionMsg);
475 if( !write_exact(p_filter, p_sys->i_socket, pv,
476 sz_rfbProtocolVersionMsg) )
478 msg_Err( p_filter, "Could not write version message" );
482 msg_Dbg( p_filter, "Reading authentication scheme" );
483 uint32_t i_authScheme;
484 if( !read_exact( p_filter, p_sys->i_socket, (char*)&i_authScheme, 4 ) )
486 msg_Err( p_filter, "Could not read authentication scheme" );
489 i_authScheme = htonl(i_authScheme);
491 msg_Dbg( p_filter, "Authentication scheme = %x", i_authScheme );
492 if ( i_authScheme == rfbConnFailed )
494 msg_Err( p_filter, "Connection rejected by server" );
497 if (i_authScheme == rfbVncAuth)
499 unsigned char challenge[CHALLENGESIZE];
500 if ( !read_exact( p_filter, p_sys->i_socket,
501 (char*)challenge, CHALLENGESIZE ) )
503 msg_Err( p_filter, "Could not read password challenge" );
507 vnc_encrypt_bytes( challenge, p_sys->psz_passwd );
509 if( !write_exact(p_filter, p_sys->i_socket,
510 (char*)challenge, CHALLENGESIZE ) )
512 msg_Err( p_filter, "Could not write password" );
515 uint32_t i_authResult;
516 if( !read_exact( p_filter, p_sys->i_socket, (char*)&i_authResult, 4 ) )
518 msg_Err( p_filter, "Could not read authentication result" );
521 i_authResult = htonl(i_authResult);
522 if (i_authResult != rfbVncAuthOK)
524 msg_Err( p_filter, "VNC authentication failed" );
529 msg_Dbg( p_filter, "Writing client init message" );
532 if( !write_exact( p_filter, p_sys->i_socket,
533 (char*)&ci, sz_rfbClientInitMsg ) )
535 msg_Err( p_filter, "Could not write client init message" );
539 msg_Dbg( p_filter, "Reading server init message" );
541 if( !read_exact( p_filter, p_sys->i_socket,
542 (char*)&si, sz_rfbServerInitMsg ) )
544 msg_Err( p_filter, "Could not read server init message" );
547 si.framebufferWidth = htons(si.framebufferWidth);
548 si.framebufferHeight = htons(si.framebufferHeight);
549 si.format.redMax = htons(si.format.redMax);
550 si.format.greenMax = htons(si.format.greenMax);
551 si.format.blueMax = htons(si.format.blueMax);
553 p_sys->i_vnc_width = si.framebufferWidth;
554 p_sys->i_vnc_height = si.framebufferHeight;
556 msg_Dbg( p_filter, "Servers preferred pixelformat: "
557 "%ux%u, R(%u),G(%u),B(%u), %u bit, depht=%u, %s",
559 si.framebufferHeight,
563 si.format.bitsPerPixel,
565 si.format.trueColour ? "TrueColor" : "Not-TrueColor");
567 uint32_t i_nameLength = htonl(si.nameLength);
568 if( i_nameLength > MAX_VNC_SERVER_NAME_LENGTH )
570 msg_Err( p_filter, "Server name too long" );
573 char s_ServerName[MAX_VNC_SERVER_NAME_LENGTH+1];
575 msg_Dbg( p_filter, "Reading server name with size = %u", i_nameLength );
576 if( !read_exact( p_filter, p_sys->i_socket, s_ServerName, i_nameLength ) )
578 msg_Err( p_filter, "Could not read server name" );
581 s_ServerName[i_nameLength] = '\0';
583 if( strcmp( s_ServerName, "VDR-OSD") == 0 )
585 msg_Dbg( p_filter, "Server is a VDR" );
586 p_sys->b_alpha_from_vnc = true;
590 msg_Dbg( p_filter, "Server is a normal VNC" );
591 p_sys->b_alpha_from_vnc = false;
595 msg_Dbg( p_filter, "Server init message read properly" );
596 msg_Dbg( p_filter, "Server name is %s", s_ServerName );
598 msg_Dbg( p_filter, "Writing SetPixelFormat message" );
600 rfbSetPixelFormatMsg sp;
601 sp.type = rfbSetPixelFormat;
602 sp.pad1 = sp.pad2 = 0;
603 sp.format.bitsPerPixel = 8;
604 sp.format.depth = 8 ;
605 sp.format.bigEndian = 1;
606 sp.format.trueColour = 0;
607 sp.format.redMax = htons(31);
608 sp.format.greenMax = htons(31);
609 sp.format.blueMax = htons(31);
610 sp.format.redShift = 10;
611 sp.format.greenShift = 5;
612 sp.format.blueShift = 0;
613 sp.format.pad1 = sp.format.pad2 = 0;
615 if( !write_exact( p_filter, p_sys->i_socket,
616 (char*)&sp, sz_rfbSetPixelFormatMsg) )
618 msg_Err( p_filter, "Could not write SetPixelFormat message" );
622 msg_Dbg( p_filter, "Writing SetEncodings message" );
624 rfbSetEncodingsMsg se;
625 se.type = rfbSetEncodings;
627 se.nEncodings = htons( p_sys->b_alpha_from_vnc ? 3 : 2 );
629 if( !write_exact( p_filter, p_sys->i_socket,
630 (char*)&se, sz_rfbSetEncodingsMsg) )
632 msg_Err( p_filter, "Could not write SetEncodings message begin" );
638 msg_Dbg( p_filter, "Writing SetEncodings rfbEncodingCopyRect" );
639 i_encoding = htonl(rfbEncodingCopyRect);
640 if( !write_exact( p_filter, p_sys->i_socket, (char*)&i_encoding, 4) )
642 msg_Err( p_filter, "Could not write encoding type rfbEncodingCopyRect." );
646 msg_Dbg( p_filter, "Writing SetEncodings rfbEncodingRRE" );
647 i_encoding = htonl(rfbEncodingRRE);
648 if( !write_exact(p_filter, p_sys->i_socket, (char*)&i_encoding, 4) )
650 msg_Err( p_filter, "Could not write encoding type rfbEncodingRRE." );
654 if( p_sys->b_alpha_from_vnc )
656 msg_Dbg( p_filter, "Writing SetEncodings rfbEncSpecialUseAlpha" );
657 i_encoding = 0x00F0FFFF; /* rfbEncSpecialUseAlpha is 0xFFFFF000
658 * before we swap it */
659 if( !write_exact(p_filter, p_sys->i_socket, (char*)&i_encoding, 4) )
661 msg_Err( p_filter, "Could not write encoding type rfbEncSpecialUseAlpha." );
669 static void* vnc_worker_thread( vlc_object_t *p_thread_obj )
671 filter_t* p_filter = (filter_t*)(p_thread_obj->p_parent);
672 filter_sys_t *p_sys = p_filter->p_sys;
673 vlc_object_t *p_update_request_thread;
674 int canc = vlc_savecancel ();
676 msg_Dbg( p_filter, "VNC worker thread started" );
678 if( !open_vnc_connection ( p_filter ) )
680 msg_Err( p_filter, "Could not connect to vnc host" );
684 if( !handshaking ( p_filter ) )
686 msg_Err( p_filter, "Error occured while handshaking vnc host" );
690 p_sys->b_connection_active = true; /* to enable sending key
691 * and mouse events to host */
693 /* Create an empty picture for VNC the data */
694 vlc_mutex_lock( &p_sys->lock );
695 p_sys->p_pic = picture_New( VLC_CODEC_YUVA,
696 p_sys->i_vnc_width, p_sys->i_vnc_height, 1, 1 );
699 vlc_mutex_unlock( &p_sys->lock );
702 p_sys->i_vnc_pixels = p_sys->i_vnc_width * p_sys->i_vnc_height;
704 vlc_mutex_unlock( &p_sys->lock );
706 /* create the update request thread */
707 p_update_request_thread = vlc_object_create( p_filter,
708 sizeof( vlc_object_t ) );
709 vlc_object_attach( p_update_request_thread, p_filter );
710 if( vlc_thread_create( p_update_request_thread,
711 "vnc update request thread",
712 update_request_thread, VLC_THREAD_PRIORITY_LOW ) )
714 vlc_object_release( p_update_request_thread );
715 msg_Err( p_filter, "cannot spawn vnc update request thread" );
719 /* connection is initialized, now read and handle server messages */
720 while( vlc_object_alive( p_thread_obj ) )
722 rfbServerToClientMsg msg;
725 memset( &msg, 0, sizeof(msg) );
727 if( !read_exact(p_filter, p_sys->i_socket, (char*)&msg, 1 ) )
729 msg_Err( p_filter, "Error while waiting for next server message");
734 case rfbFramebufferUpdate:
735 i_msgSize = sz_rfbFramebufferUpdateMsg;
737 case rfbSetColourMapEntries:
738 i_msgSize = sz_rfbSetColourMapEntriesMsg;
741 i_msgSize = sz_rfbBellMsg;
743 case rfbServerCutText:
744 i_msgSize = sz_rfbServerCutTextMsg;
746 case rfbReSizeFrameBuffer:
747 i_msgSize = sz_rfbReSizeFrameBufferMsg;
751 msg_Err( p_filter, "Invalid message %u received", msg.type );
758 if( --i_msgSize > 0 )
760 if ( !read_exact( p_filter, p_sys->i_socket,
761 ((char*)&msg)+1, i_msgSize ) )
763 msg_Err( p_filter, "Error while reading message of type %u",
768 process_server_message( p_filter, &msg);
771 msg_Dbg( p_filter, "joining update_request_thread" );
772 vlc_object_kill( p_update_request_thread );
773 vlc_thread_join( p_update_request_thread );
774 vlc_object_release( p_update_request_thread );
775 msg_Dbg( p_filter, "released update_request_thread" );
779 vlc_mutex_lock( &p_sys->lock );
780 p_sys->b_connection_active = false;
782 if (p_sys->i_socket >= 0)
783 net_Close(p_sys->i_socket);
786 picture_Release( p_sys->p_pic );
788 /* It will hide the subtitle */
789 p_sys->b_continue = false;
790 p_sys->b_need_update = true;
791 vlc_mutex_unlock( &p_sys->lock );
793 msg_Dbg( p_filter, "VNC message reader thread ended" );
794 vlc_restorecancel (canc);
798 static void* update_request_thread( vlc_object_t *p_thread_obj )
800 filter_t* p_filter = (filter_t*)(p_thread_obj->p_parent);
801 filter_sys_t *p_sys = p_filter->p_sys;
802 int canc = vlc_savecancel ();
804 msg_Dbg( p_filter, "VNC update request thread started" );
806 rfbFramebufferUpdateRequestMsg udr;
807 udr.type = rfbFramebufferUpdateRequest;
811 udr.w = htons(p_sys->i_vnc_width);
812 udr.h = htons(p_sys->i_vnc_height);
814 if( write_exact(p_filter, p_sys->i_socket, (char*)&udr,
815 sz_rfbFramebufferUpdateRequestMsg) == false)
817 msg_Err( p_filter, "Could not write rfbFramebufferUpdateRequestMsg." );
818 p_sys->b_continue = false;
823 mtime_t i_poll_interval_microsec = p_sys->i_vnc_poll_interval * 1000;
825 if( p_sys->b_vnc_poll)
827 while( vlc_object_alive( p_thread_obj ) )
829 msleep( i_poll_interval_microsec );
830 if( write_exact(p_filter, p_sys->i_socket, (char*)&udr,
831 sz_rfbFramebufferUpdateRequestMsg) == false)
833 msg_Err( p_filter, "Could not write rfbFramebufferUpdateRequestMsg." );
837 p_sys->b_continue = false;
841 msg_Dbg( p_filter, "VNC polling disabled." );
844 msg_Dbg( p_filter, "VNC update request thread ended" );
845 vlc_restorecancel (canc);
849 static bool process_server_message ( filter_t *p_filter,
850 rfbServerToClientMsg *msg )
852 filter_sys_t *p_sys = p_filter->p_sys;
856 case rfbFramebufferUpdate:
858 msg->fu.nRects = htons(msg->fu.nRects);
859 rfbFramebufferUpdateRectHeader hdr;
861 for (int i_rect = 0; i_rect < msg->fu.nRects; i_rect++)
863 if (!read_exact(p_filter, p_sys->i_socket, (char*)&hdr,
864 sz_rfbFramebufferUpdateRectHeader ) )
866 msg_Err( p_filter, "Could not read FrameBufferUpdate header" );
869 hdr.r.x = htons(hdr.r.x);
870 hdr.r.y = htons(hdr.r.y);
871 hdr.r.w = htons(hdr.r.w);
872 hdr.r.h = htons(hdr.r.h);
873 hdr.encoding = htonl(hdr.encoding);
875 switch (hdr.encoding)
880 for (i_line = 0; i_line < hdr.r.h; i_line++)
882 if ( !read_exact( p_filter, p_sys->i_socket,
883 p_sys->read_buffer, hdr.r.w ) )
886 "Could not read FrameBufferUpdate line data" );
889 vlc_mutex_lock( &p_sys->lock );
890 if ( !raw_line( p_sys, hdr.r.x,
894 msg_Err( p_filter, "raw_line failed." );
895 vlc_mutex_unlock( &p_sys->lock );
898 vlc_mutex_unlock( &p_sys->lock );
903 case rfbEncodingCopyRect:
907 if ( !read_exact( p_filter, p_sys->i_socket,
911 msg_Err( p_filter, "Could not read rfbCopyRect" );
914 rect.srcX = htons( rect.srcX );
915 rect.srcY = htons( rect.srcY );
917 vlc_mutex_lock( &p_sys->lock );
918 if ( !copy_rect( p_sys,
921 rect.srcX, rect.srcY ) )
923 msg_Err( p_filter, "copy_rect failed." );
924 vlc_mutex_unlock( &p_sys->lock );
927 vlc_mutex_unlock( &p_sys->lock );
934 if ( !read_exact( p_filter, p_sys->i_socket,
938 msg_Err( p_filter, "Could not read rfbRREHeader" );
942 if ( !read_exact(p_filter, p_sys->i_socket,
943 (char*)&i_pixcolor, 1 ) )
945 msg_Err( p_filter, "Could not read RRE pixcolor" );
949 vlc_mutex_lock( &p_sys->lock );
950 if ( !fill_rect( p_sys,
955 msg_Err( p_filter, "main fill_rect failed." );
956 vlc_mutex_unlock( &p_sys->lock );
959 vlc_mutex_unlock( &p_sys->lock );
961 rrehdr.nSubrects = htonl(rrehdr.nSubrects);
963 int i_datasize = rrehdr.nSubrects *
964 ( sizeof(i_pixcolor) + sz_rfbRectangle ) ;
965 if ( i_datasize > READ_BUFFER_SIZE )
967 msg_Err( p_filter, "Buffer too small, "
968 "need %u bytes", i_datasize );
971 if ( !read_exact( p_filter, p_sys->i_socket,
972 p_sys->read_buffer, i_datasize ) )
975 "Could not read RRE subrect data" );
980 rfbRectangle* p_subrect;
982 vlc_mutex_lock( &p_sys->lock );
984 i_subrect < rrehdr.nSubrects; i_subrect++)
986 i_pixcolor = p_sys->read_buffer[i_offset];
987 i_offset += sizeof(i_pixcolor);
989 (rfbRectangle*)(p_sys->read_buffer + i_offset);
990 i_offset += sz_rfbRectangle;
992 if (!fill_rect( p_sys,
993 htons(p_subrect->x) + hdr.r.x,
994 htons(p_subrect->y) + hdr.r.y,
1000 "subrect %u fill_rect failed.", i_subrect );
1001 vlc_mutex_unlock( &p_sys->lock );
1005 vlc_mutex_unlock( &p_sys->lock );
1012 vlc_mutex_lock( &p_sys->lock );
1013 p_sys->b_need_update = true;
1014 vlc_mutex_unlock( &p_sys->lock );
1018 case rfbSetColourMapEntries:
1020 msg->scme.nColours = htons(msg->scme.nColours);
1021 msg->scme.firstColour = htons(msg->scme.firstColour);
1023 if ( p_sys->b_alpha_from_vnc == true )
1025 i_datasize = 2 * msg->scme.nColours * 4;
1029 i_datasize = 2 * msg->scme.nColours * 3;
1031 if ( i_datasize > READ_BUFFER_SIZE )
1033 msg_Err( p_filter, "Buffer too small, need %u bytes",
1038 if ( !read_exact( p_filter, p_sys->i_socket,
1039 p_sys->read_buffer, i_datasize ) )
1041 msg_Err( p_filter, "Could not read color map data" );
1045 uint8_t i_red, i_green, i_blue, i_alpha, i_color_index;
1046 uint16_t i_offset = 0;
1049 for (int i = 0; i < msg->scme.nColours; i++)
1051 i_color_index = i+msg->scme.firstColour;
1052 if ( p_sys->b_alpha_from_vnc == true )
1054 i_alpha = p_sys->read_buffer[i_offset];
1057 i_red = p_sys->read_buffer[i_offset];
1059 i_green = p_sys->read_buffer[i_offset];
1061 i_blue = p_sys->read_buffer[i_offset];
1063 rgb_to_yuv( &p_sys->ar_color_table_yuv[i_color_index][0],
1064 &p_sys->ar_color_table_yuv[i_color_index][1],
1065 &p_sys->ar_color_table_yuv[i_color_index][2],
1069 p_sys->ar_color_table_yuv[i][3] = i_alpha;
1075 msg_Err( p_filter, "rfbBell received" );
1078 case rfbServerCutText:
1079 msg->sct.length = htons(msg->sct.length);
1080 if ( msg->sct.length > READ_BUFFER_SIZE )
1082 msg_Err( p_filter, "Buffer too small, need %u bytes", msg->sct.length );
1085 if ( !read_exact(p_filter, p_sys->i_socket,
1086 p_sys->read_buffer, msg->sct.length ) )
1088 msg_Err( p_filter, "Could not read Reading rfbServerCutText data" );
1093 case rfbReSizeFrameBuffer:
1094 msg_Err( p_filter, "Reading rfbReSizeFrameBuffer not implemented" );
1098 msg_Err( p_filter, "Invalid message %u received", msg->type );
1104 /****************************************************************************
1105 * Filter: the whole thing
1106 ****************************************************************************
1107 * This function outputs subpictures at regular time intervals.
1108 ****************************************************************************/
1109 static subpicture_t *Filter( filter_t *p_filter, mtime_t date )
1111 filter_sys_t *p_sys = p_filter->p_sys;
1112 subpicture_t *p_spu;
1113 subpicture_region_t *p_region;
1117 if( !p_sys->b_need_update )
1122 vlc_mutex_lock( &p_sys->lock );
1124 p_pic = p_sys->p_pic;
1128 vlc_mutex_unlock( &p_sys->lock );
1132 /* Allocate the subpicture internal data. */
1133 p_spu = filter_NewSubpicture( p_filter );
1136 vlc_mutex_unlock( &p_sys->lock );
1140 p_spu->b_absolute = false;
1141 p_spu->i_start = date;
1143 p_spu->b_ephemer = true;
1145 if( !p_sys->b_continue )
1146 p_spu->i_stop = p_spu->i_start + 1;
1148 /* Create new SPU region */
1149 memset( &fmt, 0, sizeof(video_format_t) );
1150 fmt.i_chroma = VLC_CODEC_YUVA;
1151 fmt.i_sar_num = fmt.i_sar_den = 1;
1152 fmt.i_width = fmt.i_visible_width = p_pic->p[Y_PLANE].i_visible_pitch;
1153 fmt.i_height = fmt.i_visible_height = p_pic->p[Y_PLANE].i_visible_lines;
1154 fmt.i_x_offset = fmt.i_y_offset = 0;
1155 p_region = subpicture_region_New( &fmt );
1158 msg_Err( p_filter, "cannot allocate SPU region" );
1159 p_filter->pf_sub_buffer_del( p_filter, p_spu );
1160 vlc_mutex_unlock( &p_sys->lock );
1164 /* FIXME the copy is probably not needed anymore */
1165 picture_Copy( p_region->p_picture, p_pic );
1167 p_sys->b_need_update = false;
1169 vlc_mutex_unlock( &p_sys->lock );
1171 /* set to one of the 9 relative locations */
1172 p_region->i_align = 0; /* Center */
1173 p_spu->b_absolute = false;
1176 p_spu->i_original_picture_width = 0; /*Let vout core do the horizontal scaling */
1177 p_spu->i_original_picture_height = fmt.i_height;
1179 p_spu->p_region = p_region;
1181 p_spu->i_alpha = ( p_sys->i_alpha );
1187 static inline void rgb_to_yuv( uint8_t *y, uint8_t *u, uint8_t *v,
1188 int r, int g, int b )
1190 *y = ( ( ( 66 * r + 129 * g + 25 * b + 128 ) >> 8 ) + 16 );
1191 *u = ( ( -38 * r - 74 * g + 112 * b + 128 ) >> 8 ) + 128 ;
1192 *v = ( ( 112 * r - 94 * g - 18 * b + 128 ) >> 8 ) + 128 ;
1195 static inline bool fill_rect( filter_sys_t* p_sys,
1196 uint16_t i_x, uint16_t i_y,
1197 uint16_t i_w, uint16_t i_h,
1200 plane_t *p_outY = p_sys->p_pic->p+Y_PLANE;
1201 plane_t *p_outU = p_sys->p_pic->p+U_PLANE;
1202 plane_t *p_outV = p_sys->p_pic->p+V_PLANE;
1203 plane_t *p_outA = p_sys->p_pic->p+A_PLANE;
1204 int i_pitch = p_outY->i_pitch;
1205 int i_lines = p_outY->i_lines;
1206 if ( i_x + i_w > i_pitch)
1208 if ( i_y + i_h > i_lines)
1210 int i_line_offset = i_y * i_pitch;
1211 uint8_t i_yuv_y = p_sys->ar_color_table_yuv[i_color][0];
1212 uint8_t i_yuv_u = p_sys->ar_color_table_yuv[i_color][1];
1213 uint8_t i_yuv_v = p_sys->ar_color_table_yuv[i_color][2];
1214 uint8_t i_alpha = p_sys->ar_color_table_yuv[i_color][3];
1215 for( int i_line = 0; i_line < i_h; i_line++ )
1217 for( int i_column = 0; i_column < i_w; i_column++ )
1219 int i_total_offset = i_line_offset + i_x + i_column;
1220 p_outY->p_pixels[ i_total_offset ] = i_yuv_y;
1221 p_outU->p_pixels[ i_total_offset ] = i_yuv_u;
1222 p_outV->p_pixels[ i_total_offset ] = i_yuv_v;
1223 p_outA->p_pixels[ i_total_offset ] = i_alpha;
1225 i_line_offset += i_pitch;
1230 static inline bool copy_rect( filter_sys_t* p_sys,
1231 uint16_t i_x, uint16_t i_y,
1232 uint16_t i_w, uint16_t i_h,
1233 uint16_t i_sx, uint16_t i_sy )
1235 plane_t *p_Y = p_sys->p_pic->p+Y_PLANE;
1236 plane_t *p_U = p_sys->p_pic->p+U_PLANE;
1237 plane_t *p_V = p_sys->p_pic->p+V_PLANE;
1238 plane_t *p_A = p_sys->p_pic->p+A_PLANE;
1240 int i_pitch = p_Y->i_pitch;
1241 int i_lines = p_Y->i_lines;
1243 fprintf( stderr, "copy_rect: (%d,%d)+(%d,%d) -> (%d,%d)\n", i_x, i_y, i_w, i_h, i_sx, i_sy );
1245 if( i_x + i_w > i_pitch || i_sx + i_w > i_pitch )
1247 if( i_y + i_h > i_lines || i_sy + i_h > i_lines)
1250 if( i_w <= 0 || i_h <= 0 )
1253 uint8_t *pb_buffer = calloc( i_w * i_h, 4 );
1257 for( int i_line = 0; i_line < i_h; i_line++ )
1259 for( int i_column = 0; i_column < i_w; i_column++ )
1261 const int i_src_offset = ( i_sy + i_line ) * i_pitch + i_sx + i_column;
1262 const int i_tmp_offset = ( 0 + i_line ) * i_w + 0 + i_column;
1264 pb_buffer[4*i_tmp_offset + 0] = p_Y->p_pixels[i_src_offset];
1265 pb_buffer[4*i_tmp_offset + 1] = p_U->p_pixels[i_src_offset];
1266 pb_buffer[4*i_tmp_offset + 2] = p_V->p_pixels[i_src_offset];
1267 pb_buffer[4*i_tmp_offset + 3] = p_A->p_pixels[i_src_offset];
1271 for( int i_line = 0; i_line < i_h; i_line++ )
1273 for( int i_column = 0; i_column < i_w; i_column++ )
1275 const int i_tmp_offset = ( 0 + i_line ) * i_w + 0 + i_column;
1276 const int i_dst_offset = ( i_y + i_line ) * i_pitch + i_x + i_column;
1278 p_Y->p_pixels[i_dst_offset] = pb_buffer[4*i_tmp_offset + 0];
1279 p_U->p_pixels[i_dst_offset] = pb_buffer[4*i_tmp_offset + 1];
1280 p_V->p_pixels[i_dst_offset] = pb_buffer[4*i_tmp_offset + 2];
1281 p_A->p_pixels[i_dst_offset] = pb_buffer[4*i_tmp_offset + 3];
1289 static inline bool raw_line( filter_sys_t* p_sys,
1290 uint16_t i_x, uint16_t i_y,
1293 plane_t *p_outY = p_sys->p_pic->p+Y_PLANE;
1294 plane_t *p_outU = p_sys->p_pic->p+U_PLANE;
1295 plane_t *p_outV = p_sys->p_pic->p+V_PLANE;
1296 plane_t *p_outA = p_sys->p_pic->p+A_PLANE;
1297 int i_pitch = p_outY->i_pitch;
1298 int i_lines = p_outY->i_lines;
1299 if ( i_x + i_w > i_pitch)
1304 int i_line_offset = i_y * i_pitch + i_x;
1306 for( int i_column = 0; i_column < i_w; i_column++ )
1308 int i_offset = i_line_offset + i_column;
1309 uint8_t i_color = p_sys->read_buffer[i_column];
1310 p_outY->p_pixels[ i_offset ] = p_sys->ar_color_table_yuv[i_color][0];
1311 p_outU->p_pixels[ i_offset ] = p_sys->ar_color_table_yuv[i_color][1];
1312 p_outV->p_pixels[ i_offset ] = p_sys->ar_color_table_yuv[i_color][2];
1313 p_outA->p_pixels[ i_offset ] = p_sys->ar_color_table_yuv[i_color][3];
1320 /*****************************************************************************
1321 * MouseEvent: callback for mouse events
1322 *****************************************************************************/
1323 static int MouseEvent( vlc_object_t *p_this, char const *psz_var,
1324 vlc_value_t oldval, vlc_value_t newval, void *p_data )
1326 VLC_UNUSED(oldval); VLC_UNUSED(newval); VLC_UNUSED(psz_var);
1328 filter_t *p_filter = (filter_t *)p_data;
1329 filter_sys_t *p_sys = p_filter->p_sys;
1331 if( !p_sys->b_vnc_mouse_events )
1334 vout_thread_t *p_vout = (vout_thread_t*)p_sys->p_vout;
1339 i_v = var_GetInteger( p_sys->p_vout, "mouse-button-down" );
1340 i_y = var_GetInteger( p_sys->p_vout, "mouse-y" );
1341 i_x = var_GetInteger( p_sys->p_vout, "mouse-x" );
1343 vlc_mutex_lock( &p_sys->lock );
1345 const int v_h = p_vout->fmt_in.i_visible_height;
1346 const int v_w = p_sys->i_vnc_width * v_h / p_sys->i_vnc_height;
1347 const int v_x = (p_vout->fmt_in.i_visible_width-v_w)/2;
1351 if( i_y < 0 || i_x < 0 || i_y >= v_h || i_x >= v_w )
1353 vlc_mutex_unlock( &p_sys->lock );
1354 msg_Dbg( p_this, "invalid mouse event? x=%d y=%d btn=%x", i_x, i_y, i_v );
1357 if( !p_sys->b_connection_active )
1359 vlc_mutex_unlock( &p_sys->lock );
1364 msg_Dbg( p_this, "mouse event x=%d y=%d btn=%x", i_x, i_y, i_v );
1368 i_x = i_x * p_sys->i_vnc_width / v_w;
1369 i_y = i_y * p_sys->i_vnc_height / v_h;
1371 /* buttonMask bits 0-7 are buttons 1-8, 0=up, 1=down */
1372 rfbPointerEventMsg ev;
1373 ev.type = rfbPointerEvent;
1374 ev.buttonMask = i_v;
1378 write_exact( p_filter, p_sys->i_socket,
1379 (char*)&ev, sz_rfbPointerEventMsg);
1381 vlc_mutex_unlock( &p_sys->lock );
1386 /*****************************************************************************
1387 * KeyEvent: callback for keyboard events
1388 *****************************************************************************/
1389 static int KeyEvent( vlc_object_t *p_this, char const *psz_var,
1390 vlc_value_t oldval, vlc_value_t newval, void *p_data )
1392 VLC_UNUSED(psz_var); VLC_UNUSED(oldval);
1394 filter_t *p_filter = (filter_t *)p_data;
1395 filter_sys_t *p_sys = p_filter->p_sys;
1397 if( !p_sys->b_vnc_key_events )
1400 msg_Dbg( p_this, "key pressed (%d) ", newval.i_int );
1402 if ( !newval.i_int )
1404 msg_Err( p_this, "Received invalid key event %d", newval.i_int );
1405 return VLC_EGENERIC;
1408 vlc_mutex_lock( &p_sys->lock );
1409 if( !p_sys->b_connection_active )
1411 vlc_mutex_unlock( &p_sys->lock );
1415 uint32_t i_key32 = newval.i_int;
1416 i_key32 = htonl(i_key32);
1419 ev.type = rfbKeyEvent;
1423 /* first key-down for modifier-keys */
1424 if (newval.i_int & KEY_MODIFIER_CTRL)
1427 write_exact( p_filter, p_sys->i_socket,
1428 (char*)&ev, sz_rfbKeyEventMsg);
1430 if (newval.i_int & KEY_MODIFIER_SHIFT)
1433 write_exact( p_filter, p_sys->i_socket,
1434 (char*)&ev, sz_rfbKeyEventMsg);
1436 if (newval.i_int & KEY_MODIFIER_ALT)
1439 write_exact( p_filter, p_sys->i_socket,
1440 (char*)&ev, sz_rfbKeyEventMsg);
1443 /* then key-down for the pressed key */
1445 write_exact( p_filter, p_sys->i_socket,
1446 (char*)&ev, sz_rfbKeyEventMsg);
1450 /* then key-up for the pressed key */
1451 write_exact( p_filter, p_sys->i_socket,
1452 (char*)&ev, sz_rfbKeyEventMsg);
1454 /* last key-down for modifier-keys */
1455 if (newval.i_int & KEY_MODIFIER_CTRL)
1458 write_exact( p_filter, p_sys->i_socket,
1459 (char*)&ev, sz_rfbKeyEventMsg);
1461 if (newval.i_int & KEY_MODIFIER_SHIFT)
1464 write_exact( p_filter, p_sys->i_socket,
1465 (char*)&ev, sz_rfbKeyEventMsg);
1467 if (newval.i_int & KEY_MODIFIER_ALT)
1470 write_exact( p_filter, p_sys->i_socket,
1471 (char*)&ev, sz_rfbKeyEventMsg);
1473 vlc_mutex_unlock( &p_sys->lock );
1478 static void vnc_encrypt_bytes( unsigned char *bytes, char *passwd )
1480 unsigned char key[8];
1483 for (i = 0; i < 8; i++)
1484 key[i] = i < strlen( passwd ) ? passwd[i] : '\0';
1486 gcry_cipher_hd_t ctx;
1487 gcry_cipher_open( &ctx, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB,0);
1489 /* reverse bits of the key */
1490 for( i = 0 ; i < 8 ; i ++ )
1493 (((key[i] >> 6) & 0x01 ) << 1 ) +
1494 (((key[i] >> 5) & 0x01 ) << 2 ) +
1495 (((key[i] >> 4) & 0x01 ) << 3 ) +
1496 (((key[i] >> 3) & 0x01 ) << 4 ) +
1497 (((key[i] >> 2) & 0x01 ) << 5 ) +
1498 (((key[i] >> 1) & 0x01 ) << 6 ) +
1499 ((key[i] & 0x01) << 7 );
1501 gcry_cipher_setkey( ctx, key, 8 );
1502 gcry_cipher_encrypt( ctx, bytes, CHALLENGESIZE, bytes, CHALLENGESIZE );
1503 gcry_cipher_close( ctx );