1 /*****************************************************************************
2 * update.c: VLC update checking and downloading
3 *****************************************************************************
4 * Copyright © 2005-2008 the VideoLAN team
7 * Authors: Antoine Cellerier <dionoea -at- videolan -dot- org>
8 * Rémi Duraffort <ivoire at via.ecp.fr>
9 Rafaël Carré <funman@videolanorg>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either release 2 of the License, or
14 * (at your option) any later release.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
24 *****************************************************************************/
28 * This file contains functions related to VLC update management
31 /*****************************************************************************
33 *****************************************************************************/
41 #include <vlc_update.h>
42 #include <vlc_pgpkey.h>
43 #include <vlc_stream.h>
44 #include <vlc_interface.h>
47 /*****************************************************************************
49 *****************************************************************************/
52 * Here is the format of these "status files" :
53 * First line is the last version: "X.Y.Ze" where:
54 * * X is the major number
55 * * Y is the minor number
56 * * Z is the revision number
57 * * e is an OPTIONAL extra letter
58 * * AKA "0.8.6d" or "0.9.0"
59 * Second line is an url of the binary for this last version
60 * Third line is a description of the update (it MAY be extended to several lines, but for now it is only one line)
63 #if defined( UNDER_CE )
64 # define UPDATE_VLC_STATUS_URL "http://update.videolan.org/vlc/status-ce"
65 #elif defined( WIN32 )
66 # define UPDATE_VLC_STATUS_URL "http://update.videolan.org/vlc/status-win-x86"
67 #elif defined( __APPLE__ )
68 # if defined( __powerpc__ ) || defined( __ppc__ ) || defined( __ppc64__ )
69 # define UPDATE_VLC_STATUS_URL "http://update.videolan.org/vlc/status-mac-ppc"
71 # define UPDATE_VLC_STATUS_URL "http://update.videolan.org/vlc/status-mac-x86"
73 #elif defined( SYS_BEOS )
74 # define UPDATE_VLC_STATUS_URL "http://update.videolan.org/vlc/status-beos-x86"
76 # define UPDATE_VLC_STATUS_URL "http://update.videolan.org/vlc/status"
80 /*****************************************************************************
82 *****************************************************************************/
83 static void EmptyRelease( update_t *p_update );
84 static vlc_bool_t GetUpdateFile( update_t *p_update );
85 static int CompareReleases( const struct update_release_t *p1,
86 const struct update_release_t *p2 );
87 static char * size_str( long int l_size );
90 /*****************************************************************************
92 *****************************************************************************/
94 #define packet_type( c ) ( ( c & 0x3c ) >> 2 ) /* 0x3C = 00111100 */
95 #define packet_header_len( c ) ( ( c & 0x03 ) + 1 ) /* number of bytes in a packet header */
97 static inline int scalar_number( uint8_t *p, int header_len )
101 else if( header_len == 2 )
102 return( (p[0] << 8) + p[1] );
103 else if( header_len == 4 )
104 return( (p[0] << 24) + (p[1] << 16) + (p[2] << 8) + p[3] );
109 /* number of data bytes in a MPI */
110 #define mpi_len( mpi ) ( ( scalar_number( mpi, 2 ) + 7 ) / 8 )
113 * fill a public_key_packet_t structure from public key packet data
114 * verify that it is a version 4 public key packet, using DSA
116 static int parse_public_key_packet( public_key_packet_t *p_key, uint8_t *p_buf,
117 size_t i_packet_len )
119 if( i_packet_len > 418 )
122 p_key->version = *p_buf++;
123 if( p_key->version != 4 )
126 /* warn when timestamp is > date ? */
127 memcpy( p_key->timestamp, p_buf, 4 ); p_buf += 4;
129 p_key->algo = *p_buf++;
130 if( p_key->algo != PUBLIC_KEY_ALGO_DSA )
133 int i_p_len = mpi_len( p_buf );
138 memcpy( p_key->p, p_buf, 2+i_p_len ); p_buf += 2+i_p_len;
140 memmove( p_key->q, p_key->p + 2+i_p_len, 2+20 + 2+128 + 2+128 );
143 int i_q_len = mpi_len( p_buf );
148 memcpy( p_key->q, p_buf, 2+i_q_len ); p_buf += 2+i_q_len;
150 memmove( p_key->g, p_key->q + 2+i_q_len, 2+128 + 2+128 );
153 int i_g_len = mpi_len( p_buf );
158 memcpy( p_key->g, p_buf, 2+i_g_len ); p_buf += 2+i_g_len;
160 memmove( p_key->y, p_key->g + 2+i_g_len, 2+128 );
163 int i_y_len = mpi_len( p_buf );
167 memcpy( p_key->y, p_buf, 2+i_y_len );
173 * fill a signature_packet_v4_t from signature packet data
174 * verify that it was used with a DSA public key, using SHA-1 digest
176 static int parse_signature_v4_packet( signature_packet_v4_t *p_sig,
177 uint8_t *p_buf, size_t i_sig_len )
182 p_sig->version = *p_buf++;
183 if( p_sig->version != 4 )
186 p_sig->type = *p_buf++;
187 if( p_sig->type < GENERIC_KEY_SIGNATURE ||
188 p_sig->type > POSITIVE_KEY_SIGNATURE )
191 p_sig->public_key_algo = *p_buf++;
192 if( p_sig->public_key_algo != PUBLIC_KEY_ALGO_DSA )
195 p_sig->digest_algo = *p_buf++;
196 if( p_sig->digest_algo != DIGEST_ALGO_SHA1 )
199 memcpy( p_sig->hashed_data_len, p_buf, 2 ); p_buf += 2;
202 size_t i_hashed_data_len = scalar_number( p_sig->hashed_data_len, 2 );
203 i_pos += i_hashed_data_len;
204 if( i_pos > i_sig_len - 48 ) /* r & s are 44 bytes in total,
205 * + the unhashed data length (2 bytes)
206 * + the hash verification (2 bytes) */
209 p_sig->hashed_data = (uint8_t*) malloc( i_hashed_data_len );
210 if( !p_sig->hashed_data )
212 memcpy( p_sig->hashed_data, p_buf, i_hashed_data_len );
213 p_buf += i_hashed_data_len;
215 memcpy( p_sig->unhashed_data_len, p_buf, 2 ); p_buf += 2;
217 size_t i_unhashed_data_len = scalar_number( p_sig->unhashed_data_len, 2 );
218 i_pos += 2 + i_unhashed_data_len;
219 if( i_pos != i_sig_len - 46 )
221 free( p_sig->hashed_data );
225 p_sig->unhashed_data = (uint8_t*) malloc( i_unhashed_data_len );
226 if( !p_sig->unhashed_data )
228 free( p_sig->hashed_data );
231 memcpy( p_sig->unhashed_data, p_buf, i_unhashed_data_len );
232 p_buf += i_unhashed_data_len;
234 memcpy( p_sig->hash_verification, p_buf, 2 ); p_buf += 2;
236 int i_r_len = mpi_len( p_buf );
239 free( p_sig->hashed_data );
240 free( p_sig->unhashed_data );
245 memcpy( p_sig->r, p_buf, 2 + i_r_len );
246 p_buf += 2 + i_r_len;
249 int i_s_len = mpi_len( p_buf );
252 free( p_sig->hashed_data );
253 free( p_sig->unhashed_data );
258 memcpy( p_sig->s, p_buf, 2 + i_s_len );
259 p_buf += 2 + i_s_len;
266 * crc_octets() was lamely copied from rfc 2440
267 * Copyright (C) The Internet Society (1998). All Rights Reserved.
269 #define CRC24_INIT 0xB704CEL
270 #define CRC24_POLY 0x1864CFBL
272 static long crc_octets( uint8_t *octets, size_t len )
274 long crc = CRC24_INIT;
278 crc ^= (*octets++) << 16;
279 for (i = 0; i < 8; i++)
286 return crc & 0xFFFFFFL;
290 * Transform an armored document in binary format
291 * Used on public keys and signatures
293 static int pgp_unarmor( char *p_ibuf, size_t i_ibuf_len,
294 uint8_t *p_obuf, size_t i_obuf_len )
296 char *p_ipos = p_ibuf;
297 uint8_t *p_opos = p_obuf;
299 int i_header_skipped = 0;
301 while( !i_end && p_ipos < p_ibuf + i_ibuf_len && *p_ipos != '=' )
303 if( *p_ipos == '\r' || *p_ipos == '\n' )
309 size_t i_line_len = strcspn( p_ipos, "\r\n" );
310 if( i_line_len == 0 )
313 if( !i_header_skipped )
315 if( !strncmp( p_ipos, "-----BEGIN PGP", 14 ) )
316 i_header_skipped = 1;
318 p_ipos += i_line_len + 1;
322 if( !strncmp( p_ipos, "Version:", 8 ) )
324 p_ipos += i_line_len + 1;
328 if( p_ipos[i_line_len - 1] == '=' )
331 p_ipos[i_line_len - 1] = '\0';
334 p_ipos[i_line_len] = '\0';
336 p_opos += vlc_b64_decode_binary_to_buffer( p_opos,
337 p_obuf - p_opos + i_obuf_len, p_ipos );
338 p_ipos += i_line_len + 1;
341 /* XXX: the CRC is OPTIONAL, really require it ? */
342 if( p_ipos + 5 > p_ibuf + i_ibuf_len || *p_ipos++ != '=' )
346 if( vlc_b64_decode_binary_to_buffer( p_crc, 3, p_ipos ) != 3 )
349 long l_crc = crc_octets( p_obuf, p_opos - p_obuf );
350 long l_crc2 = ( 0 << 24 ) + ( p_crc[0] << 16 ) + ( p_crc[1] << 8 ) + p_crc[2];
352 return l_crc2 == l_crc ? p_opos - p_obuf : 0;
356 * Download the signature associated to a document or a binary file.
357 * We're given the file's url, we just append ".asc" to it and download
359 static int download_signature( vlc_object_t *p_this,
360 signature_packet_v3_t *p_sig,
361 const char *psz_url )
363 char *psz_sig = (char*) malloc( strlen( psz_url ) + 4 + 1 ); /* ".asc" + \0 */
367 strcpy( psz_sig, psz_url );
368 strcat( psz_sig, ".asc" );
370 stream_t *p_stream = stream_UrlNew( p_this, psz_sig );
376 int64_t i_size = stream_Size( p_stream );
377 if( i_size <= 65 ) /* binary format signature */
379 msg_Dbg( p_this, "Downloading unarmored signature" );
380 int i_read = stream_Read( p_stream, p_sig, (int)i_size );
381 stream_Delete( p_stream );
382 if( i_read != i_size )
384 msg_Dbg( p_this, "Couldn't read full signature" );
391 msg_Dbg( p_this, "Downloading armored signature" );
392 char *p_buf = (char*)malloc( i_size );
395 stream_Delete( p_stream );
399 int i_read = stream_Read( p_stream, p_buf, (int)i_size );
401 stream_Delete( p_stream );
403 if( i_read != i_size )
405 msg_Dbg( p_this, "Couldn't read full signature" );
410 int i_bytes = pgp_unarmor( p_buf, i_size, (uint8_t*)p_sig, 65 );
415 msg_Dbg( p_this, "Signature is too big: %d bytes", i_bytes );
420 int i_r_len = mpi_len( p_sig->r );
423 msg_Dbg( p_this, "Signature invalid" );
426 else if( i_r_len < 20 )
427 /* move s to the right place if r is less than 20 bytes */
428 memmove( p_sig->s, p_sig->r + 2 + i_r_len, 20 + 2 );
435 * Verify an OpenPGP signature made on some SHA-1 hash, with some DSA public key
437 static int verify_signature( vlc_object_t *p_this, uint8_t *p_r, uint8_t *p_s,
438 public_key_packet_t *p_key, uint8_t *p_hash )
440 /* the data to be verified (a SHA-1 hash) */
441 const char *hash_sexp_s = "(data(flags raw)(value %m))";
443 const char *key_sexp_s = "(public-key(dsa(p %m)(q %m)(g %m)(y %m)))";
445 const char *sig_sexp_s = "(sig-val(dsa(r %m )(s %m )))";
448 gcry_mpi_t p, q, g, y, r, s, hash;
449 p = q = g = y = r = s = hash = NULL;
450 gcry_sexp_t key_sexp, hash_sexp, sig_sexp;
451 key_sexp = hash_sexp = sig_sexp = NULL;
453 int i_p_len = mpi_len( p_key->p );
454 int i_q_len = mpi_len( p_key->q );
455 int i_g_len = mpi_len( p_key->g );
456 int i_y_len = mpi_len( p_key->y );
457 if( gcry_mpi_scan( &p, GCRYMPI_FMT_USG, p_key->p + 2, i_p_len, NULL ) ||
458 gcry_mpi_scan( &q, GCRYMPI_FMT_USG, p_key->q + 2, i_q_len, NULL ) ||
459 gcry_mpi_scan( &g, GCRYMPI_FMT_USG, p_key->g + 2, i_g_len, NULL ) ||
460 gcry_mpi_scan( &y, GCRYMPI_FMT_USG, p_key->y + 2, i_y_len, NULL ) ||
461 gcry_sexp_build( &key_sexp, &erroff, key_sexp_s, p, q, g, y ) )
464 int i_r_len = mpi_len( p_r );
465 int i_s_len = mpi_len( p_s );
466 if( gcry_mpi_scan( &r, GCRYMPI_FMT_USG, p_r + 2, i_r_len, NULL ) ||
467 gcry_mpi_scan( &s, GCRYMPI_FMT_USG, p_s + 2, i_s_len, NULL ) ||
468 gcry_sexp_build( &sig_sexp, &erroff, sig_sexp_s, r, s ) )
472 if( gcry_mpi_scan( &hash, GCRYMPI_FMT_USG, p_hash, i_hash_len, NULL ) ||
473 gcry_sexp_build( &hash_sexp, &erroff, hash_sexp_s, hash ) )
476 if( gcry_pk_verify( sig_sexp, hash_sexp, key_sexp ) )
482 if( p ) gcry_mpi_release( p );
483 if( q ) gcry_mpi_release( q );
484 if( g ) gcry_mpi_release( g );
485 if( y ) gcry_mpi_release( y );
486 if( r ) gcry_mpi_release( r );
487 if( s ) gcry_mpi_release( s );
488 if( hash ) gcry_mpi_release( hash );
489 if( key_sexp ) gcry_sexp_release( key_sexp );
490 if( sig_sexp ) gcry_sexp_release( sig_sexp );
491 if( hash_sexp ) gcry_sexp_release( hash_sexp );
496 * Return the long id (8 bytes) of the public key used to generate a signature
498 static uint8_t *get_issuer_from_signature_v4( signature_packet_v4_t *p_sig )
500 uint8_t *p = p_sig->unhashed_data;
501 uint8_t *max_pos = p + scalar_number( p_sig->unhashed_data_len, 2 );
505 int i_subpacket_len = *p < 192 ? *p++ :
506 *p < 255 ? ((*p++ - 192) << 8) + *p++ + 192 :
507 ((*++p) << 24) + (*++p << 16) + (*++p << 8) + *++p;
509 if( p >= max_pos - 1 )
512 if( *p == ISSUER_SUBPACKET )
515 p += i_subpacket_len;
521 * fill a public_key_t with public key data, including:
522 * * public key packet
523 * * signature packet issued by key which long id is p_sig_issuer
526 static int parse_public_key( const uint8_t *p_key_data, size_t i_key_len, public_key_t *p_key, const uint8_t *p_sig_issuer )
528 uint8_t *pos = (uint8_t*) p_key_data;
529 uint8_t *max_pos = pos + i_key_len;
532 #define PUBLIC_KEY_FOUND 0x01
533 #define USER_ID_FOUND 0x02
534 #define SIGNATURE_FOUND 0X04
536 uint8_t *p_key_unarmored = NULL;
538 signature_packet_v4_t sig;
540 p_key->psz_username = NULL;
541 p_key->sig.hashed_data = p_key->sig.unhashed_data = NULL;
543 if( !( *pos & 0x80 ) )
544 { /* first byte is ASCII, unarmoring */
545 p_key_unarmored = (uint8_t*)malloc( i_key_len );
546 if( !p_key_unarmored )
548 int i_len = pgp_unarmor( (char*)p_key_data, i_key_len,
549 p_key_unarmored, i_key_len );
554 pos = p_key_unarmored;
555 max_pos = pos + i_len;
558 while( pos < max_pos )
560 if( !(*pos & 0x80) || *pos & 0x40 )
563 int i_type = packet_type( *pos );
565 int i_header_len = packet_header_len( *pos++ );
566 if( pos + i_header_len > max_pos )
569 int i_packet_len = scalar_number( pos, i_header_len );
572 if( pos + i_packet_len > max_pos )
579 case PUBLIC_KEY_PACKET:
580 i_status |= PUBLIC_KEY_FOUND;
581 if( parse_public_key_packet( &p_key->key, pos, i_packet_len ) != VLC_SUCCESS )
585 case SIGNATURE_PACKET:
586 if( !p_sig_issuer || i_status & SIGNATURE_FOUND ||
587 parse_signature_v4_packet( &sig, pos, i_packet_len ) != VLC_SUCCESS )
589 p_issuer = get_issuer_from_signature_v4( &sig );
590 if( memcmp( p_issuer, p_sig_issuer, 8 ) == 0 )
592 memcpy( &p_key->sig, &sig, sizeof( signature_packet_v4_t ) );
593 i_status |= SIGNATURE_FOUND;
597 free( sig.hashed_data );
598 free( sig.unhashed_data );
603 if( p_key->psz_username ) /* save only the first User ID */
605 i_status |= USER_ID_FOUND;
606 p_key->psz_username = (uint8_t*)malloc( i_packet_len + 1);
607 if( !p_key->psz_username )
610 memcpy( p_key->psz_username, pos, i_packet_len );
611 p_key->psz_username[i_packet_len] = '\0';
619 free( p_key_unarmored );
621 if( !( i_status & ( PUBLIC_KEY_FOUND + USER_ID_FOUND ) ) )
624 if( p_sig_issuer && !( i_status & SIGNATURE_FOUND ) )
630 free( p_key->sig.hashed_data );
631 free( p_key->sig.unhashed_data );
632 free( p_key->psz_username );
633 free( p_key_unarmored );
638 * return a sha1 hash of a file
640 static uint8_t *hash_sha1_from_file( const char *psz_file,
641 signature_packet_v3_t *p_sig )
643 FILE *f = utf8_fopen( psz_file, "r" );
647 uint8_t buffer[4096];
650 if( gcry_md_open( &hd, GCRY_MD_SHA1, 0 ) )
657 while( ( i_read = fread( buffer, 1, sizeof(buffer), f ) ) > 0 )
658 gcry_md_write( hd, buffer, i_read );
660 gcry_md_putc( hd, p_sig->type );
661 gcry_md_write( hd, &p_sig->timestamp, 4 );
666 /* FIXME: is it always padded to 20 bytes ? */
667 return( (uint8_t*) gcry_md_read( hd, GCRY_MD_SHA1) );
671 * download a public key (the last one) from videolan server, and parse it
673 static public_key_t *download_key( vlc_object_t *p_this, const uint8_t *p_longid, const uint8_t *p_signature_issuer )
676 if( asprintf( &psz_url, "http://download.videolan.org/pub/keys/%.2X%.2X%.2X%.2X%.2X%.2X%.2X%.2X.asc",
677 p_longid[0], p_longid[1], p_longid[2], p_longid[3],
678 p_longid[4], p_longid[5], p_longid[6], p_longid[7] ) == -1 )
681 stream_t *p_stream = stream_UrlNew( p_this, psz_url );
686 int64_t i_size = stream_Size( p_stream );
689 stream_Delete( p_stream );
693 uint8_t *p_buf = (uint8_t*)malloc( i_size );
696 stream_Delete( p_stream );
700 int i_read = stream_Read( p_stream, p_buf, (int)i_size );
701 stream_Delete( p_stream );
703 if( i_read != (int)i_size )
705 msg_Dbg( p_this, "Couldn't read full GPG key" );
710 public_key_t *p_pkey = (public_key_t*) malloc( sizeof( public_key_t ) );
717 int i_error = parse_public_key( p_buf, i_read, p_pkey, p_signature_issuer );
720 if( i_error != VLC_SUCCESS )
722 msg_Dbg( p_this, "Couldn't parse GPG key" );
731 * Generate a SHA-1 hash on a public key, to verify a signature made on that hash
732 * Note that we need the signature to compute the hash
734 static uint8_t *key_sign_hash( public_key_t *p_pkey )
736 gcry_error_t error = 0;
739 error = gcry_md_open( &hd, GCRY_MD_SHA1, 0 );
743 gcry_md_putc( hd, 0x99 );
745 gcry_md_putc( hd, (418 >> 8) & 0xff );
746 gcry_md_putc( hd, 418 & 0xff );
748 gcry_md_write( hd, (uint8_t*)&p_pkey->key, 6 ); /* version,timestamp,algo */
750 int i_p_len = mpi_len( p_pkey->key.p );
751 gcry_md_write( hd, (uint8_t*)&p_pkey->key.p, 2 );
752 gcry_md_write( hd, (uint8_t*)&p_pkey->key.p + 2, i_p_len );
754 int i_g_len = mpi_len( p_pkey->key.g );
755 gcry_md_write( hd, (uint8_t*)&p_pkey->key.g, 2 );
756 gcry_md_write( hd, (uint8_t*)&p_pkey->key.g + 2, i_g_len );
758 int i_q_len = mpi_len( p_pkey->key.q );
759 gcry_md_write( hd, (uint8_t*)&p_pkey->key.q, 2 );
760 gcry_md_write( hd, (uint8_t*)&p_pkey->key.q + 2, i_q_len );
762 int i_y_len = mpi_len( p_pkey->key.y );
763 gcry_md_write( hd, (uint8_t*)&p_pkey->key.y, 2 );
764 gcry_md_write( hd, (uint8_t*)&p_pkey->key.y + 2, i_y_len );
766 gcry_md_putc( hd, 0xb4 );
768 int i_len = strlen((char*)p_pkey->psz_username);
770 gcry_md_putc( hd, (i_len << 24) & 0xff );
771 gcry_md_putc( hd, (i_len << 16) & 0xff );
772 gcry_md_putc( hd, (i_len << 8) & 0xff );
773 gcry_md_putc( hd, (i_len) & 0xff );
775 gcry_md_write( hd, p_pkey->psz_username, i_len );
777 size_t i_hashed_data_len = scalar_number( p_pkey->sig.hashed_data_len, 2 );
779 gcry_md_putc( hd, p_pkey->sig.version );
780 gcry_md_putc( hd, p_pkey->sig.type );
781 gcry_md_putc( hd, p_pkey->sig.public_key_algo );
782 gcry_md_putc( hd, p_pkey->sig.digest_algo );
783 gcry_md_write( hd, p_pkey->sig.hashed_data_len, 2 );
784 gcry_md_write( hd, p_pkey->sig.hashed_data, i_hashed_data_len );
786 gcry_md_putc( hd, 0x04 );
787 gcry_md_putc( hd, 0xff );
789 i_hashed_data_len += 6; /* hashed data + 6 bytes header */
791 gcry_md_putc( hd, (i_hashed_data_len << 24) & 0xff);
792 gcry_md_putc( hd, (i_hashed_data_len << 16) &0xff );
793 gcry_md_putc( hd, (i_hashed_data_len << 8) & 0xff );
794 gcry_md_putc( hd, (i_hashed_data_len) & 0xff );
798 uint8_t *p_hash = gcry_md_read( hd, GCRY_MD_SHA1);
800 if( p_hash[0] != p_pkey->sig.hash_verification[0] ||
801 p_hash[1] != p_pkey->sig.hash_verification[1] )
811 /*****************************************************************************
813 *****************************************************************************/
816 * Create a new update VLC struct
818 * \param p_this the calling vlc_object
819 * \return pointer to new update_t or NULL
821 update_t *__update_New( vlc_object_t *p_this )
826 p_update = (update_t *)malloc( sizeof( update_t ) );
827 if( !p_update ) return NULL;
829 vlc_mutex_init( p_this, &p_update->lock );
831 p_update->p_libvlc = p_this->p_libvlc;
833 p_update->release.psz_url = NULL;
834 p_update->release.psz_desc = NULL;
836 p_update->p_pkey = NULL;
842 * Delete an update_t struct
844 * \param p_update update_t* pointer
847 void update_Delete( update_t *p_update )
851 vlc_mutex_destroy( &p_update->lock );
853 free( p_update->release.psz_url );
854 free( p_update->release.psz_desc );
855 free( p_update->p_pkey );
861 * Empty the release struct
863 * \param p_update update_t* pointer
866 static void EmptyRelease( update_t *p_update )
868 p_update->release.i_major = 0;
869 p_update->release.i_minor = 0;
870 p_update->release.i_revision = 0;
872 FREENULL( p_update->release.psz_url );
873 FREENULL( p_update->release.psz_desc );
877 * Get the update file and parse it
878 * *p_update has to be locked when calling this function
880 * \param p_update pointer to update struct
881 * \return VLC_TRUE if the update is valid and authenticated
883 static vlc_bool_t GetUpdateFile( update_t *p_update )
885 stream_t *p_stream = NULL;
890 char *psz_line = NULL;
891 char *psz_version_line = NULL;
893 p_stream = stream_UrlNew( p_update->p_libvlc, UPDATE_VLC_STATUS_URL );
896 msg_Err( p_update->p_libvlc, "Failed to open %s for reading",
897 UPDATE_VLC_STATUS_URL );
901 /* Try to read three lines */
902 if( !( psz_line = stream_ReadLine( p_stream ) ) )
904 msg_Err( p_update->p_libvlc, "Update file %s is corrupted : missing version",
905 UPDATE_VLC_STATUS_URL );
909 psz_version_line = psz_line;
910 /* first line : version number */
911 p_update->release.extra = 0;
912 switch( sscanf( psz_line, "%i.%i.%i%c", &i_major, &i_minor, &i_revision, &extra ) )
915 p_update->release.extra = extra;
917 p_update->release.i_major = i_major;
918 p_update->release.i_minor = i_minor;
919 p_update->release.i_revision = i_revision;
922 msg_Err( p_update->p_libvlc, "Update version false formated" );
926 /* Second line : URL */
927 if( !( psz_line = stream_ReadLine( p_stream ) ) )
929 msg_Err( p_update->p_libvlc, "Update file %s is corrupted : URL missing",
930 UPDATE_VLC_STATUS_URL );
933 p_update->release.psz_url = psz_line;
936 /* Third line : description */
937 if( !( psz_line = stream_ReadLine( p_stream ) ) )
939 msg_Err( p_update->p_libvlc, "Update file %s is corrupted : description missing",
940 UPDATE_VLC_STATUS_URL );
943 p_update->release.psz_desc = psz_line;
945 stream_Delete( p_stream );
948 /* Now that we know the status is valid, we must download its signature
949 * to authenticate it */
950 signature_packet_v3_t sign;
951 if( download_signature( VLC_OBJECT( p_update->p_libvlc ), &sign,
952 UPDATE_VLC_STATUS_URL ) != VLC_SUCCESS )
954 msg_Err( p_update->p_libvlc, "Couldn't download signature of status file" );
958 if( sign.type != BINARY_SIGNATURE && sign.type != TEXT_SIGNATURE )
960 msg_Err( p_update->p_libvlc, "Invalid signature type" );
964 p_update->p_pkey = (public_key_t*)malloc( sizeof( public_key_t ) );
965 if( !p_update->p_pkey )
968 if( parse_public_key( videolan_public_key, sizeof( videolan_public_key ),
969 p_update->p_pkey, NULL ) != VLC_SUCCESS )
971 msg_Err( p_update->p_libvlc, "Couldn't parse embedded public key, something went really wrong..." );
972 FREENULL( p_update->p_pkey );
976 if( memcmp( sign.issuer_longid, videolan_public_key_longid , 8 ) != 0 )
978 msg_Dbg( p_update->p_libvlc, "Need to download the GPG key" );
979 public_key_t *p_new_pkey = download_key(
980 VLC_OBJECT(p_update->p_libvlc),
981 sign.issuer_longid, videolan_public_key_longid );
984 msg_Err( p_update->p_libvlc, "Couldn't download GPG key" );
985 FREENULL( p_update->p_pkey );
989 uint8_t *p_hash = key_sign_hash( p_new_pkey );
992 msg_Err( p_update->p_libvlc, "Failed to hash signature" );
994 FREENULL( p_update->p_pkey );
998 if( verify_signature( VLC_OBJECT(p_update->p_libvlc),
999 p_new_pkey->sig.r, p_new_pkey->sig.s,
1000 &p_update->p_pkey->key, p_hash ) == VLC_SUCCESS )
1003 msg_Info( p_update->p_libvlc, "Key authenticated" );
1004 free( p_update->p_pkey );
1005 p_update->p_pkey = p_new_pkey;
1010 msg_Err( p_update->p_libvlc, "Key signature invalid !\n" );
1016 if( gcry_md_open( &hd, GCRY_MD_SHA1, 0 ) )
1019 gcry_md_write( hd, psz_version_line, strlen( psz_version_line ) );
1020 FREENULL( psz_version_line );
1021 if( sign.type == TEXT_SIGNATURE )
1022 gcry_md_putc( hd, '\r' );
1023 gcry_md_putc( hd, '\n' );
1024 gcry_md_write( hd, p_update->release.psz_url,
1025 strlen( p_update->release.psz_url ) );
1026 if( sign.type == TEXT_SIGNATURE )
1027 gcry_md_putc( hd, '\r' );
1028 gcry_md_putc( hd, '\n' );
1029 gcry_md_write( hd, p_update->release.psz_desc,
1030 strlen( p_update->release.psz_desc ) );
1031 if( sign.type == TEXT_SIGNATURE )
1032 gcry_md_putc( hd, '\r' );
1033 gcry_md_putc( hd, '\n' );
1035 gcry_md_putc( hd, sign.type );
1036 gcry_md_write( hd, &sign.timestamp, 4 );
1038 gcry_md_final( hd );
1040 uint8_t *p_hash = gcry_md_read( hd, GCRY_MD_SHA1 );
1042 if( p_hash[0] != sign.hash_verification[0] ||
1043 p_hash[1] != sign.hash_verification[1] )
1045 msg_Warn( p_update->p_libvlc, "Bad SHA1 hash for status file" );
1050 if( verify_signature( VLC_OBJECT(p_update->p_libvlc),
1051 sign.r, sign.s, &p_update->p_pkey->key, p_hash ) != VLC_SUCCESS )
1053 msg_Err( p_update->p_libvlc, "BAD SIGNATURE for status file" );
1059 msg_Info( p_update->p_libvlc, "Status file authenticated" );
1066 stream_Delete( p_stream );
1067 free( psz_version_line );
1073 * Struct to launch the check in an other thread
1079 void (*pf_callback)( void *, vlc_bool_t );
1081 } update_check_thread_t;
1083 void update_CheckReal( update_check_thread_t *p_uct );
1088 * \param p_update pointer to update struct
1089 * \param pf_callback pointer to a function to call when the update_check is finished
1090 * \param p_data pointer to some datas to give to the callback
1093 void update_Check( update_t *p_update, void (*pf_callback)( void*, vlc_bool_t ), void *p_data )
1097 update_check_thread_t *p_uct = vlc_object_create( p_update->p_libvlc,
1098 sizeof( update_check_thread_t ) );
1099 p_uct->p_update = p_update;
1100 p_uct->pf_callback = pf_callback;
1101 p_uct->p_data = p_data;
1103 vlc_thread_create( p_uct, "check for update", update_CheckReal,
1104 VLC_THREAD_PRIORITY_LOW, VLC_FALSE );
1107 void update_CheckReal( update_check_thread_t *p_uct )
1110 vlc_mutex_lock( &p_uct->p_update->lock );
1112 EmptyRelease( p_uct->p_update );
1113 b_ret = GetUpdateFile( p_uct->p_update );
1114 vlc_mutex_unlock( &p_uct->p_update->lock );
1116 if( p_uct->pf_callback )
1117 (p_uct->pf_callback)( p_uct->p_data, b_ret );
1119 vlc_object_destroy( p_uct );
1123 * Compare two release numbers
1125 * \param p1 first release
1126 * \param p2 second release
1127 * \return UpdateReleaseStatus(Older|Equal|Newer)
1129 static int CompareReleases( const struct update_release_t *p1,
1130 const struct update_release_t *p2 )
1133 d = ( p1->i_major << 24 ) + ( p1->i_minor << 16 ) + ( p1->i_revision << 8 )
1134 - ( p2->i_major << 24 ) - ( p2->i_minor << 16 ) - ( p2->i_revision << 8 )
1135 + ( p1->extra ) - ( p2->extra );
1138 return UpdateReleaseStatusOlder;
1140 return UpdateReleaseStatusEqual;
1142 return UpdateReleaseStatusNewer;
1146 * Compare a given release's version number to the current VLC's one
1148 * \param p_update structure
1149 * \return UpdateReleaseStatus(Older|Equal|Newer)
1151 int update_CompareReleaseToCurrent( update_t *p_update )
1155 struct update_release_t c;
1157 /* get the current version number */
1158 c.i_major = *PACKAGE_VERSION_MAJOR - '0';
1159 c.i_minor = *PACKAGE_VERSION_MINOR - '0';
1160 c.i_revision = *PACKAGE_VERSION_REVISION - '0';
1161 c.extra = *PACKAGE_VERSION_EXTRA;
1163 return CompareReleases( &p_update->release, &c );
1167 * Convert a long int size in bytes to a string
1169 * \param l_size the size in bytes
1170 * \return the size as a string
1172 static char *size_str( long int l_size )
1174 char *psz_tmp = NULL;
1176 asprintf( &psz_tmp, "%.1f GB", (float)l_size/(1<<30) );
1177 else if( l_size >> 20 )
1178 asprintf( &psz_tmp, "%.1f MB", (float)l_size/(1<<20) );
1179 else if( l_size >> 10 )
1180 asprintf( &psz_tmp, "%.1f kB", (float)l_size/(1<<10) );
1182 asprintf( &psz_tmp, "%ld B", l_size );
1188 * Struct to launch the download in a thread
1195 } update_download_thread_t;
1197 void update_DownloadReal( update_download_thread_t *p_udt );
1200 * Download the file given in the update_t
1202 * \param p_update structure
1203 * \param dir to store the download file
1206 void update_Download( update_t *p_update, char *psz_destdir )
1210 update_download_thread_t *p_udt = vlc_object_create( p_update->p_libvlc,
1211 sizeof( update_download_thread_t ) );
1213 p_udt->p_update = p_update;
1214 p_udt->psz_destdir = psz_destdir ? strdup( psz_destdir ) : NULL;
1216 vlc_thread_create( p_udt, "download update", update_DownloadReal,
1217 VLC_THREAD_PRIORITY_LOW, VLC_FALSE );
1220 void update_DownloadReal( update_download_thread_t *p_udt )
1224 long int l_downloaded = 0;
1226 char *psz_status = NULL;
1227 char *psz_downloaded = NULL;
1228 char *psz_size = NULL;
1229 char *psz_destfile = NULL;
1230 char *psz_tmpdestfile = NULL;
1232 FILE *p_file = NULL;
1233 stream_t *p_stream = NULL;
1234 void* p_buffer = NULL;
1237 update_t *p_update = p_udt->p_update;
1238 char *psz_destdir = p_udt->psz_destdir;
1240 /* Open the stream */
1241 p_stream = stream_UrlNew( p_udt, p_update->release.psz_url );
1244 msg_Err( p_udt, "Failed to open %s for reading", p_update->release.psz_url );
1248 /* Get the stream size */
1249 l_size = stream_Size( p_stream );
1251 /* Get the file name and open it*/
1252 psz_tmpdestfile = strrchr( p_update->release.psz_url, '/' );
1253 if( !psz_tmpdestfile )
1255 msg_Err( p_udt, "The URL %s is false formated", p_update->release.psz_url );
1259 if( asprintf( &psz_destfile, "%s%s", psz_destdir, psz_tmpdestfile ) == -1 )
1262 p_file = utf8_fopen( psz_destfile, "w" );
1265 msg_Err( p_udt, "Failed to open %s for writing", psz_destfile );
1269 /* Create a buffer and fill it with the downloaded file */
1270 p_buffer = (void *)malloc( 1 << 10 );
1274 psz_size = size_str( l_size );
1275 if( asprintf( &psz_status, "%s\nDownloading... O.O/%s %.1f%% done", p_update->release.psz_url, psz_size, 0.0 ) != -1 )
1277 i_progress = intf_UserProgress( p_udt, "Downloading ...", psz_status, 0.0, 0 );
1281 while( ( i_read = stream_Read( p_stream, p_buffer, 1 << 10 ) ) &&
1282 !intf_ProgressIsCancelled( p_udt, i_progress ) )
1284 fwrite( p_buffer, i_read, 1, p_file );
1286 l_downloaded += i_read;
1287 psz_downloaded = size_str( l_downloaded );
1288 f_progress = 100.0*(float)l_downloaded/(float)l_size;
1290 if( asprintf( &psz_status, "%s\nDonwloading... %s/%s %.1f%% done", p_update->release.psz_url,
1291 psz_downloaded, psz_size, f_progress ) != -1 )
1293 intf_ProgressUpdate( p_udt, i_progress, psz_status, f_progress, 0 );
1296 free( psz_downloaded );
1299 /* Finish the progress bar or delete the file if the user had canceled */
1303 if( !intf_ProgressIsCancelled( p_udt, i_progress ) )
1305 if( asprintf( &psz_status, "%s\nDone %s (100.0%%)", p_update->release.psz_url, psz_size ) != -1 )
1307 intf_ProgressUpdate( p_udt, i_progress, psz_status, 100.0, 0 );
1313 utf8_unlink( psz_destfile );
1317 signature_packet_v3_t sign;
1318 if( download_signature( VLC_OBJECT( p_udt ), &sign,
1319 p_update->release.psz_url ) != VLC_SUCCESS )
1321 utf8_unlink( psz_destfile );
1323 intf_UserFatal( p_udt, VLC_TRUE, _("File can not be verified"),
1324 _("It was not possible to downlaod a cryptographic signature for "
1325 "downloaded file \"%s\", and so VLC deleted it."),
1327 msg_Err( p_udt, "Couldn't download signature of downloaded file" );
1331 if( sign.type != BINARY_SIGNATURE )
1333 utf8_unlink( psz_destfile );
1334 msg_Err( p_udt, "Invalid signature type" );
1335 intf_UserFatal( p_udt, VLC_TRUE, _("Invalid signature"),
1336 _("The cryptographic signature for downloaded file \"%s\" was "
1337 "invalid and couldn't be used to securely verify it, and so "
1343 uint8_t *p_hash = hash_sha1_from_file( psz_destfile, &sign );
1346 msg_Err( p_udt, "Unable to hash %s", psz_destfile );
1347 utf8_unlink( psz_destfile );
1348 intf_UserFatal( p_udt, VLC_TRUE, _("File not verifiable"),
1349 _("It was not possible to securely verify downloaded file \"%s\", "
1350 "and so VLC deleted it."),
1356 if( p_hash[0] != sign.hash_verification[0] ||
1357 p_hash[1] != sign.hash_verification[1] )
1359 utf8_unlink( psz_destfile );
1360 intf_UserFatal( p_udt, VLC_TRUE, _("File corrupted"),
1361 _("Downloaded file \"%s\" was corrupted, and so VLC deleted it."),
1363 msg_Err( p_udt, "Bad SHA1 hash for %s", psz_destfile );
1368 if( verify_signature( VLC_OBJECT(p_udt), sign.r, sign.s,
1369 &p_update->p_pkey->key, p_hash ) != VLC_SUCCESS )
1371 utf8_unlink( psz_destfile );
1372 intf_UserFatal( p_udt, VLC_TRUE, _("File corrupted"),
1373 _("Downloaded file \"%s\" was corrupted, and so VLC deleted it."),
1375 msg_Err( p_udt, "BAD SIGNATURE for %s", psz_destfile );
1380 msg_Info( p_udt, "%s authenticated", psz_destfile );
1385 stream_Delete( p_stream );
1388 free( psz_destdir );
1389 free( psz_destfile );
1393 vlc_object_destroy( p_udt );