1 /*****************************************************************************
2 * update.c: VLC update checking and downloading
3 *****************************************************************************
4 * Copyright © 2005-2007 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 and plugins 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 to the last binary
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 memcpy( p_key->p, p_buf, 2+128 ); p_buf += 2+128;
134 if( mpi_len( p_key->p ) != 128 )
137 memcpy( p_key->q, p_buf, 2+20 ); p_buf += 2+20;
138 if( mpi_len( p_key->q ) != 20 )
141 memcpy( p_key->g, p_buf, 2+128 ); p_buf += 2+128;
142 if( mpi_len( p_key->g ) != 128 )
145 memcpy( p_key->y, p_buf, 2+128 ); p_buf += 2+128;
146 if( mpi_len( p_key->y ) != 128 )
153 * fill a signature_packet_v4_t from signature packet data
154 * verify that it was used with a DSA public key, using SHA-1 digest
156 static int parse_signature_v4_packet( signature_packet_v4_t *p_sig,
157 uint8_t *p_buf, size_t i_sig_len )
162 p_sig->version = *p_buf++;
163 if( p_sig->version != 4 )
166 p_sig->type = *p_buf++;
167 if( p_sig->type < GENERIC_KEY_SIGNATURE ||
168 p_sig->type > POSITIVE_KEY_SIGNATURE )
171 p_sig->public_key_algo = *p_buf++;
172 if( p_sig->public_key_algo != PUBLIC_KEY_ALGO_DSA )
175 p_sig->digest_algo = *p_buf++;
176 if( p_sig->digest_algo != DIGEST_ALGO_SHA1 )
179 memcpy( p_sig->hashed_data_len, p_buf, 2 ); p_buf += 2;
182 size_t i_hashed_data_len = scalar_number( p_sig->hashed_data_len, 2 );
183 i_pos += i_hashed_data_len;
184 if( i_pos > i_sig_len - 48 ) /* r & s are 44 bytes in total,
185 * + the unhashed data length (2 bytes)
186 * + the hash verification (2 bytes) */
189 p_sig->hashed_data = (uint8_t*) malloc( i_hashed_data_len );
190 if( !p_sig->hashed_data )
192 memcpy( p_sig->hashed_data, p_buf, i_hashed_data_len );
193 p_buf += i_hashed_data_len;
195 memcpy( p_sig->unhashed_data_len, p_buf, 2 ); p_buf += 2;
197 size_t i_unhashed_data_len = scalar_number( p_sig->unhashed_data_len, 2 );
198 i_pos += 2 + i_unhashed_data_len;
199 if( i_pos != i_sig_len - 46 )
201 free( p_sig->hashed_data );
205 p_sig->unhashed_data = (uint8_t*) malloc( i_unhashed_data_len );
206 if( !p_sig->unhashed_data )
208 free( p_sig->hashed_data );
211 memcpy( p_sig->unhashed_data, p_buf, i_unhashed_data_len );
212 p_buf += i_unhashed_data_len;
214 memcpy( p_sig->hash_verification, p_buf, 2 ); p_buf += 2;
216 memcpy( p_sig->r, p_buf, 22 ); p_buf += 22;
217 if( mpi_len( p_sig->r ) != 20 )
219 free( p_sig->hashed_data );
220 free( p_sig->unhashed_data );
224 memcpy( p_sig->s, p_buf, 22 );
225 if( mpi_len( p_sig->s ) != 20 )
227 free( p_sig->hashed_data );
228 free( p_sig->unhashed_data );
236 * crc_octets() was lamely copied from rfc 2440
237 * Copyright (C) The Internet Society (1998). All Rights Reserved.
239 #define CRC24_INIT 0xB704CEL
240 #define CRC24_POLY 0x1864CFBL
242 static long crc_octets( uint8_t *octets, size_t len )
244 long crc = CRC24_INIT;
248 crc ^= (*octets++) << 16;
249 for (i = 0; i < 8; i++)
256 return crc & 0xFFFFFFL;
260 * Transform an armored document in binary format
261 * Used on public keys and signatures
263 static int pgp_unarmor( char *p_ibuf, size_t i_ibuf_len,
264 uint8_t *p_obuf, size_t i_obuf_len )
266 char *p_ipos = p_ibuf;
267 uint8_t *p_opos = p_obuf;
269 int i_header_skipped = 0;
271 while( !i_end && p_ipos < p_ibuf + i_ibuf_len && *p_ipos != '=' )
273 if( *p_ipos == '\r' || *p_ipos == '\n' )
279 size_t i_line_len = strcspn( p_ipos, "\r\n" );
280 if( i_line_len == 0 )
283 if( !i_header_skipped )
285 if( !strncmp( p_ipos, "-----BEGIN PGP", 14 ) )
286 i_header_skipped = 1;
288 p_ipos += i_line_len + 1;
292 if( !strncmp( p_ipos, "Version:", 8 ) )
294 p_ipos += i_line_len + 1;
298 if( p_ipos[i_line_len - 1] == '=' )
301 p_ipos[i_line_len - 1] = '\0';
304 p_ipos[i_line_len] = '\0';
306 p_opos += vlc_b64_decode_binary_to_buffer( p_opos,
307 p_obuf - p_opos + i_obuf_len, p_ipos );
308 p_ipos += i_line_len + 1;
311 /* XXX: the CRC is OPTIONAL, really require it ? */
312 if( p_ipos + 5 > p_ibuf + i_ibuf_len || *p_ipos++ != '=' )
316 if( vlc_b64_decode_binary_to_buffer( p_crc, 3, p_ipos ) != 3 )
319 long l_crc = crc_octets( p_obuf, p_opos - p_obuf );
320 long l_crc2 = ( 0 << 24 ) + ( p_crc[0] << 16 ) + ( p_crc[1] << 8 ) + p_crc[2];
322 return l_crc2 == l_crc ? p_opos - p_obuf : 0;
326 * Download the signature associated to a document or a binary file.
327 * We're given the file's url, we just append ".asc" to it and download
329 static int download_signature( vlc_object_t *p_this,
330 signature_packet_v3_t *p_sig,
331 const char *psz_url )
333 char *psz_sig = (char*) malloc( strlen( psz_url ) + 4 + 1 ); /* ".asc" + \0 */
337 strcpy( psz_sig, psz_url );
338 strcat( psz_sig, ".asc" );
340 stream_t *p_stream = stream_UrlNew( p_this, psz_sig );
346 int64_t i_size = stream_Size( p_stream );
347 /* FIXME: a signature can be less than 65 bytes, if r & s numbers
348 * do not have 160 significant bits.
352 stream_Delete( p_stream );
353 msg_Dbg( p_this, "Signature too small" );
356 else if( i_size == 65 ) /* binary format signature */
358 msg_Dbg( p_this, "Downloading unarmored signature" );
359 int i_read = stream_Read( p_stream, p_sig, (int)i_size );
360 stream_Delete( p_stream );
361 if( i_read != i_size )
363 msg_Dbg( p_this, "Couldn't read full signature" );
370 msg_Dbg( p_this, "Downloading armored signature" );
371 char *p_buf = (char*)malloc( i_size );
374 stream_Delete( p_stream );
378 int i_read = stream_Read( p_stream, p_buf, (int)i_size );
380 stream_Delete( p_stream );
382 if( i_read != i_size )
384 msg_Dbg( p_this, "Couldn't read full signature" );
389 int i_bytes = pgp_unarmor( p_buf, i_size, (uint8_t*)p_sig, 65 );
394 msg_Dbg( p_this, "Unarmoring failed: signature is %d bytes", i_bytes );
402 * Verify an OpenPGP signature made on some SHA-1 hash, with some DSA public key
404 static int verify_signature( vlc_object_t *p_this, uint8_t *p_r, uint8_t *p_s,
405 public_key_packet_t *p_key, uint8_t *p_hash )
407 /* the data to be verified (a SHA-1 hash) */
408 const char *hash_sexp_s = "(data(flags raw)(value %m))";
410 const char *key_sexp_s = "(public-key(dsa(p %m)(q %m)(g %m)(y %m)))";
412 const char *sig_sexp_s = "(sig-val(dsa(r %m )(s %m )))";
415 gcry_mpi_t p, q, g, y, r, s, hash;
416 p = q = g = y = r = s = hash = NULL;
417 gcry_sexp_t key_sexp, hash_sexp, sig_sexp;
418 key_sexp = hash_sexp = sig_sexp = NULL;
420 if( gcry_mpi_scan( &p, GCRYMPI_FMT_USG, p_key->p + 2, 128, NULL ) ||
421 gcry_mpi_scan( &q, GCRYMPI_FMT_USG, p_key->q + 2, 20, NULL ) ||
422 gcry_mpi_scan( &g, GCRYMPI_FMT_USG, p_key->g + 2, 128, NULL ) ||
423 gcry_mpi_scan( &y, GCRYMPI_FMT_USG, p_key->y + 2, 128, NULL ) ||
424 gcry_sexp_build( &key_sexp, &erroff, key_sexp_s, p, q, g, y ) )
427 if( gcry_mpi_scan( &r, GCRYMPI_FMT_USG, p_r + 2, 20, NULL ) ||
428 gcry_mpi_scan( &s, GCRYMPI_FMT_USG, p_s + 2, 20, NULL ) ||
429 gcry_sexp_build( &sig_sexp, &erroff, sig_sexp_s, r, s ) )
432 if( gcry_mpi_scan( &hash, GCRYMPI_FMT_USG, p_hash, 20, NULL ) ||
433 gcry_sexp_build( &hash_sexp, &erroff, hash_sexp_s, hash ) )
436 if( gcry_pk_verify( sig_sexp, hash_sexp, key_sexp ) )
442 if( p ) gcry_mpi_release( p );
443 if( q ) gcry_mpi_release( q );
444 if( g ) gcry_mpi_release( g );
445 if( y ) gcry_mpi_release( y );
446 if( r ) gcry_mpi_release( r );
447 if( s ) gcry_mpi_release( s );
448 if( hash ) gcry_mpi_release( hash );
449 if( key_sexp ) gcry_sexp_release( key_sexp );
450 if( sig_sexp ) gcry_sexp_release( sig_sexp );
451 if( hash_sexp ) gcry_sexp_release( hash_sexp );
456 * Return the long id (8 bytes) of the public key used to generate a signature
458 static uint8_t *get_issuer_from_signature_v4( signature_packet_v4_t *p_sig )
460 uint8_t *p = p_sig->unhashed_data;
461 uint8_t *max_pos = p + scalar_number( p_sig->unhashed_data_len, 2 );
465 int i_subpacket_len = *p < 192 ? *p++ :
466 *p < 255 ? ((*p++ - 192) << 8) + *p++ + 192 :
467 ((*++p) << 24) + (*++p << 16) + (*++p << 8) + *++p;
469 if( p >= max_pos - 1 )
472 if( *p == ISSUER_SUBPACKET )
475 p += i_subpacket_len;
481 * fill a public_key_t with public key data, including:
482 * * public key packet
483 * * signature packet issued by key which long id is p_sig_issuer
486 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 )
488 uint8_t *pos = (uint8_t*) p_key_data;
489 uint8_t *max_pos = pos + i_key_len;
492 #define PUBLIC_KEY_FOUND 0x01
493 #define USER_ID_FOUND 0x02
494 #define SIGNATURE_FOUND 0X04
496 uint8_t *p_key_unarmored = NULL;
498 signature_packet_v4_t sig;
500 p_key->psz_username = NULL;
501 p_key->sig.hashed_data = p_key->sig.unhashed_data = NULL;
503 if( !( *pos & 0x80 ) )
504 { /* first byte is ASCII, unarmoring */
505 p_key_unarmored = (uint8_t*)malloc( i_key_len );
506 if( !p_key_unarmored )
508 int i_len = pgp_unarmor( (char*)p_key_data, i_key_len,
509 p_key_unarmored, i_key_len );
514 pos = p_key_unarmored;
515 max_pos = pos + i_len;
518 while( pos < max_pos )
520 if( !(*pos & 0x80) || *pos & 0x40 )
523 int i_type = packet_type( *pos );
525 int i_header_len = packet_header_len( *pos++ );
526 if( pos + i_header_len > max_pos )
529 int i_packet_len = scalar_number( pos, i_header_len );
532 if( pos + i_packet_len > max_pos )
539 case PUBLIC_KEY_PACKET:
540 i_status |= PUBLIC_KEY_FOUND;
541 if( parse_public_key_packet( &p_key->key, pos, i_packet_len ) != VLC_SUCCESS )
545 case SIGNATURE_PACKET:
546 if( !p_sig_issuer || i_status & SIGNATURE_FOUND ||
547 parse_signature_v4_packet( &sig, pos, i_packet_len ) != VLC_SUCCESS )
549 p_issuer = get_issuer_from_signature_v4( &sig );
550 if( memcmp( p_issuer, p_sig_issuer, 8 ) == 0 )
552 memcpy( &p_key->sig, &sig, sizeof( signature_packet_v4_t ) );
553 i_status |= SIGNATURE_FOUND;
557 free( sig.hashed_data );
558 free( sig.unhashed_data );
563 if( p_key->psz_username ) /* save only the first User ID */
565 i_status |= USER_ID_FOUND;
566 p_key->psz_username = (uint8_t*)malloc( i_packet_len + 1);
567 if( !p_key->psz_username )
570 memcpy( p_key->psz_username, pos, i_packet_len );
571 p_key->psz_username[i_packet_len] = '\0';
579 free( p_key_unarmored );
581 if( !( i_status & ( PUBLIC_KEY_FOUND + USER_ID_FOUND ) ) )
584 if( p_sig_issuer && !( i_status & SIGNATURE_FOUND ) )
590 free( p_key->sig.hashed_data );
591 free( p_key->sig.unhashed_data );
592 free( p_key->psz_username );
593 free( p_key_unarmored );
598 * return a sha1 hash of a file
600 static uint8_t *hash_sha1_from_file( const char *psz_file,
601 signature_packet_v3_t *p_sig )
603 FILE *f = utf8_fopen( psz_file, "r" );
607 uint8_t buffer[4096];
610 if( gcry_md_open( &hd, GCRY_MD_SHA1, 0 ) )
617 while( ( i_read = fread( buffer, 1, sizeof(buffer), f ) ) > 0 )
618 gcry_md_write( hd, buffer, i_read );
620 gcry_md_putc( hd, p_sig->type );
621 gcry_md_write( hd, &p_sig->timestamp, 4 );
626 return( (uint8_t*) gcry_md_read( hd, GCRY_MD_SHA1) );
630 * download a public key (the last one) from videolan server, and parse it
632 static public_key_t *download_key( vlc_object_t *p_this, const uint8_t *p_longid, const uint8_t *p_signature_issuer )
635 if( asprintf( &psz_url, "http://download.videolan.org/pub/keys/%.2X%.2X%.2X%.2X%.2X%.2X%.2X%.2X.asc",
636 p_longid[0], p_longid[1], p_longid[2], p_longid[3],
637 p_longid[4], p_longid[5], p_longid[6], p_longid[7] ) == -1 )
640 stream_t *p_stream = stream_UrlNew( p_this, psz_url );
645 int64_t i_size = stream_Size( p_stream );
648 stream_Delete( p_stream );
652 uint8_t *p_buf = (uint8_t*)malloc( i_size );
655 stream_Delete( p_stream );
659 int i_read = stream_Read( p_stream, p_buf, (int)i_size );
660 stream_Delete( p_stream );
662 if( i_read != (int)i_size )
664 msg_Dbg( p_this, "Couldn't read full GPG key" );
669 public_key_t *p_pkey = (public_key_t*) malloc( sizeof( public_key_t ) );
676 int i_error = parse_public_key( p_buf, i_read, p_pkey, p_signature_issuer );
679 if( i_error != VLC_SUCCESS )
681 msg_Dbg( p_this, "Couldn't parse GPG key" );
690 * Generate a SHA-1 hash on a public key, to verify a signature made on that hash
691 * Note that we need the signature to compute the hash
693 static uint8_t *key_sign_hash( public_key_t *p_pkey )
695 gcry_error_t error = 0;
698 error = gcry_md_open( &hd, GCRY_MD_SHA1, 0 );
702 gcry_md_putc( hd, 0x99 );
704 gcry_md_putc( hd, (418 >> 8) & 0xff );
705 gcry_md_putc( hd, 418 & 0xff );
707 gcry_md_write( hd, (uint8_t*)&p_pkey->key, 418 );
709 gcry_md_putc( hd, 0xb4 );
711 int i_len = strlen((char*)p_pkey->psz_username);
713 gcry_md_putc( hd, (i_len << 24) & 0xff );
714 gcry_md_putc( hd, (i_len << 16) & 0xff );
715 gcry_md_putc( hd, (i_len << 8) & 0xff );
716 gcry_md_putc( hd, (i_len) & 0xff );
718 gcry_md_write( hd, p_pkey->psz_username, i_len );
720 size_t i_hashed_data_len = scalar_number( p_pkey->sig.hashed_data_len, 2 );
722 gcry_md_putc( hd, p_pkey->sig.version );
723 gcry_md_putc( hd, p_pkey->sig.type );
724 gcry_md_putc( hd, p_pkey->sig.public_key_algo );
725 gcry_md_putc( hd, p_pkey->sig.digest_algo );
726 gcry_md_write( hd, p_pkey->sig.hashed_data_len, 2 );
727 gcry_md_write( hd, p_pkey->sig.hashed_data, i_hashed_data_len );
729 gcry_md_putc( hd, 0x04 );
730 gcry_md_putc( hd, 0xff );
732 i_hashed_data_len += 6; /* hashed data + 6 bytes header */
734 gcry_md_putc( hd, (i_hashed_data_len << 24) & 0xff);
735 gcry_md_putc( hd, (i_hashed_data_len << 16) &0xff );
736 gcry_md_putc( hd, (i_hashed_data_len << 8) & 0xff );
737 gcry_md_putc( hd, (i_hashed_data_len) & 0xff );
741 uint8_t *p_hash = gcry_md_read( hd, GCRY_MD_SHA1);
743 if( p_hash[0] != p_pkey->sig.hash_verification[0] ||
744 p_hash[1] != p_pkey->sig.hash_verification[1] )
754 /*****************************************************************************
756 *****************************************************************************/
759 * Create a new update VLC struct
761 * \param p_this the calling vlc_object
762 * \return pointer to new update_t or NULL
764 update_t *__update_New( vlc_object_t *p_this )
769 p_update = (update_t *)malloc( sizeof( update_t ) );
770 if( !p_update ) return NULL;
772 vlc_mutex_init( p_this, &p_update->lock );
774 p_update->p_libvlc = p_this->p_libvlc;
776 p_update->release.psz_url = NULL;
777 p_update->release.psz_desc = NULL;
779 p_update->p_pkey = NULL;
785 * Delete an update_t struct
787 * \param p_update update_t* pointer
790 void update_Delete( update_t *p_update )
794 vlc_mutex_destroy( &p_update->lock );
796 free( p_update->release.psz_url );
797 free( p_update->release.psz_desc );
798 free( p_update->p_pkey );
804 * Empty the release struct
806 * \param p_update update_t* pointer
809 static void EmptyRelease( update_t *p_update )
811 p_update->release.i_major = 0;
812 p_update->release.i_minor = 0;
813 p_update->release.i_revision = 0;
815 FREENULL( p_update->release.psz_url );
816 FREENULL( p_update->release.psz_desc );
820 * Get the update file and parse it
821 * *p_update has to be locked when calling this function
823 * \param p_update pointer to update struct
824 * \return VLC_TRUE if the update is valid and authenticated
826 static vlc_bool_t GetUpdateFile( update_t *p_update )
828 stream_t *p_stream = NULL;
833 char *psz_line = NULL;
834 char *psz_version_line = NULL;
836 p_stream = stream_UrlNew( p_update->p_libvlc, UPDATE_VLC_STATUS_URL );
839 msg_Err( p_update->p_libvlc, "Failed to open %s for reading",
840 UPDATE_VLC_STATUS_URL );
844 /* Try to read three lines */
845 if( !( psz_line = stream_ReadLine( p_stream ) ) )
847 msg_Err( p_update->p_libvlc, "Update file %s is corrupted : missing version",
848 UPDATE_VLC_STATUS_URL );
852 psz_version_line = psz_line;
853 /* first line : version number */
854 p_update->release.extra = 0;
855 switch( sscanf( psz_line, "%i.%i.%i%c", &i_major, &i_minor, &i_revision, &extra ) )
858 p_update->release.extra = extra;
860 p_update->release.i_major = i_major;
861 p_update->release.i_minor = i_minor;
862 p_update->release.i_revision = i_revision;
865 msg_Err( p_update->p_libvlc, "Update version false formated" );
869 /* Second line : URL */
870 if( !( psz_line = stream_ReadLine( p_stream ) ) )
872 msg_Err( p_update->p_libvlc, "Update file %s is corrupted : URL missing",
873 UPDATE_VLC_STATUS_URL );
876 p_update->release.psz_url = psz_line;
879 /* Third line : description */
880 if( !( psz_line = stream_ReadLine( p_stream ) ) )
882 msg_Err( p_update->p_libvlc, "Update file %s is corrupted : description missing",
883 UPDATE_VLC_STATUS_URL );
886 p_update->release.psz_desc = psz_line;
888 stream_Delete( p_stream );
891 /* Now that we know the status is valid, we must download its signature
892 * to authenticate it */
893 signature_packet_v3_t sign;
894 if( download_signature( VLC_OBJECT( p_update->p_libvlc ), &sign,
895 UPDATE_VLC_STATUS_URL ) != VLC_SUCCESS )
897 msg_Err( p_update->p_libvlc, "Couldn't download signature of status file" );
901 if( sign.type != BINARY_SIGNATURE && sign.type != TEXT_SIGNATURE )
903 msg_Err( p_update->p_libvlc, "Invalid signature type" );
907 p_update->p_pkey = (public_key_t*)malloc( sizeof( public_key_t ) );
908 if( !p_update->p_pkey )
911 if( parse_public_key( videolan_public_key, sizeof( videolan_public_key ),
912 p_update->p_pkey, NULL ) != VLC_SUCCESS )
914 msg_Err( p_update->p_libvlc, "Couldn't parse embedded public key, something went really wrong..." );
915 FREENULL( p_update->p_pkey );
919 if( memcmp( sign.issuer_longid, videolan_public_key_longid , 8 ) != 0 )
921 msg_Dbg( p_update->p_libvlc, "Need to download the GPG key" );
922 public_key_t *p_new_pkey = download_key(
923 VLC_OBJECT(p_update->p_libvlc),
924 sign.issuer_longid, videolan_public_key_longid );
927 msg_Err( p_update->p_libvlc, "Couldn't download GPG key" );
928 FREENULL( p_update->p_pkey );
932 uint8_t *p_hash = key_sign_hash( p_new_pkey );
935 msg_Err( p_update->p_libvlc, "Failed to hash signature" );
937 FREENULL( p_update->p_pkey );
941 if( verify_signature( VLC_OBJECT(p_update->p_libvlc),
942 p_new_pkey->sig.r, p_new_pkey->sig.s,
943 &p_update->p_pkey->key, p_hash ) == VLC_SUCCESS )
946 msg_Info( p_update->p_libvlc, "Key authenticated" );
947 free( p_update->p_pkey );
948 p_update->p_pkey = p_new_pkey;
953 msg_Err( p_update->p_libvlc, "Key signature invalid !\n" );
959 if( gcry_md_open( &hd, GCRY_MD_SHA1, 0 ) )
962 gcry_md_write( hd, psz_version_line, strlen( psz_version_line ) );
963 FREENULL( psz_version_line );
964 if( sign.type == TEXT_SIGNATURE )
965 gcry_md_putc( hd, '\r' );
966 gcry_md_putc( hd, '\n' );
967 gcry_md_write( hd, p_update->release.psz_url,
968 strlen( p_update->release.psz_url ) );
969 if( sign.type == TEXT_SIGNATURE )
970 gcry_md_putc( hd, '\r' );
971 gcry_md_putc( hd, '\n' );
972 gcry_md_write( hd, p_update->release.psz_desc,
973 strlen( p_update->release.psz_desc ) );
974 if( sign.type == TEXT_SIGNATURE )
975 gcry_md_putc( hd, '\r' );
976 gcry_md_putc( hd, '\n' );
978 gcry_md_putc( hd, sign.type );
979 gcry_md_write( hd, &sign.timestamp, 4 );
983 uint8_t *p_hash = gcry_md_read( hd, GCRY_MD_SHA1 );
985 if( p_hash[0] != sign.hash_verification[0] ||
986 p_hash[1] != sign.hash_verification[1] )
988 msg_Warn( p_update->p_libvlc, "Bad SHA1 hash for status file" );
993 if( verify_signature( VLC_OBJECT(p_update->p_libvlc),
994 sign.r, sign.s, &p_update->p_pkey->key, p_hash ) != VLC_SUCCESS )
996 msg_Err( p_update->p_libvlc, "BAD SIGNATURE for status file" );
1002 msg_Info( p_update->p_libvlc, "Status file authenticated" );
1009 stream_Delete( p_stream );
1010 free( psz_version_line );
1016 * Struct to launch the check in an other thread
1022 void (*pf_callback)( void *, vlc_bool_t );
1024 } update_check_thread_t;
1026 void update_CheckReal( update_check_thread_t *p_uct );
1031 * \param p_update pointer to update struct
1032 * \param pf_callback pointer to a function to call when the update_check is finished
1033 * \param p_data pointer to some datas to give to the callback
1036 void update_Check( update_t *p_update, void (*pf_callback)( void*, vlc_bool_t ), void *p_data )
1040 update_check_thread_t *p_uct = vlc_object_create( p_update->p_libvlc,
1041 sizeof( update_check_thread_t ) );
1042 p_uct->p_update = p_update;
1043 p_uct->pf_callback = pf_callback;
1044 p_uct->p_data = p_data;
1046 vlc_thread_create( p_uct, "check for update", update_CheckReal,
1047 VLC_THREAD_PRIORITY_LOW, VLC_FALSE );
1050 void update_CheckReal( update_check_thread_t *p_uct )
1053 vlc_mutex_lock( &p_uct->p_update->lock );
1055 EmptyRelease( p_uct->p_update );
1056 b_ret = GetUpdateFile( p_uct->p_update );
1057 vlc_mutex_unlock( &p_uct->p_update->lock );
1059 if( p_uct->pf_callback )
1060 (p_uct->pf_callback)( p_uct->p_data, b_ret );
1062 vlc_object_destroy( p_uct );
1066 * Compare two release numbers
1068 * \param p1 first release
1069 * \param p2 second release
1070 * \return UpdateReleaseStatus(Older|Equal|Newer)
1072 static int CompareReleases( const struct update_release_t *p1,
1073 const struct update_release_t *p2 )
1076 d = ( p1->i_major << 24 ) + ( p1->i_minor << 16 ) + ( p1->i_revision << 8 )
1077 - ( p2->i_major << 24 ) - ( p2->i_minor << 16 ) - ( p2->i_revision << 8 )
1078 + ( p1->extra ) - ( p2->extra );
1081 return UpdateReleaseStatusOlder;
1083 return UpdateReleaseStatusEqual;
1085 return UpdateReleaseStatusNewer;
1089 * Compare a given release's version number to the current VLC's one
1091 * \param p_update structure
1092 * \return UpdateReleaseStatus(Older|Equal|Newer)
1094 int update_CompareReleaseToCurrent( update_t *p_update )
1098 struct update_release_t c;
1100 /* get the current version number */
1101 c.i_major = *PACKAGE_VERSION_MAJOR - '0';
1102 c.i_minor = *PACKAGE_VERSION_MINOR - '0';
1103 c.i_revision = *PACKAGE_VERSION_REVISION - '0';
1104 c.extra = *PACKAGE_VERSION_EXTRA;
1106 return CompareReleases( &p_update->release, &c );
1110 * Convert a long int size in bytes to a string
1112 * \param l_size the size in bytes
1113 * \return the size as a string
1115 static char *size_str( long int l_size )
1117 char *psz_tmp = NULL;
1119 asprintf( &psz_tmp, "%.1f GB", (float)l_size/(1<<30) );
1120 else if( l_size >> 20 )
1121 asprintf( &psz_tmp, "%.1f MB", (float)l_size/(1<<20) );
1122 else if( l_size >> 10 )
1123 asprintf( &psz_tmp, "%.1f kB", (float)l_size/(1<<10) );
1125 asprintf( &psz_tmp, "%ld B", l_size );
1131 * Struct to launch the download in a thread
1138 } update_download_thread_t;
1140 void update_DownloadReal( update_download_thread_t *p_udt );
1143 * Download the file given in the update_t
1145 * \param p_update structure
1146 * \param dir to store the download file
1149 void update_Download( update_t *p_update, char *psz_destdir )
1153 update_download_thread_t *p_udt = vlc_object_create( p_update->p_libvlc,
1154 sizeof( update_download_thread_t ) );
1156 p_udt->p_update = p_update;
1157 p_udt->psz_destdir = psz_destdir ? strdup( psz_destdir ) : NULL;
1159 vlc_thread_create( p_udt, "download update", update_DownloadReal,
1160 VLC_THREAD_PRIORITY_LOW, VLC_FALSE );
1163 void update_DownloadReal( update_download_thread_t *p_udt )
1167 long int l_downloaded = 0;
1169 char *psz_status = NULL;
1170 char *psz_downloaded = NULL;
1171 char *psz_size = NULL;
1172 char *psz_destfile = NULL;
1173 char *psz_tmpdestfile = NULL;
1175 FILE *p_file = NULL;
1176 stream_t *p_stream = NULL;
1177 void* p_buffer = NULL;
1180 update_t *p_update = p_udt->p_update;
1181 char *psz_destdir = p_udt->psz_destdir;
1183 /* Open the stream */
1184 p_stream = stream_UrlNew( p_udt, p_update->release.psz_url );
1187 msg_Err( p_udt, "Failed to open %s for reading", p_update->release.psz_url );
1191 /* Get the stream size */
1192 l_size = stream_Size( p_stream );
1194 /* Get the file name and open it*/
1195 psz_tmpdestfile = strrchr( p_update->release.psz_url, '/' );
1196 if( !psz_tmpdestfile )
1198 msg_Err( p_udt, "The URL %s is false formated", p_update->release.psz_url );
1202 if( asprintf( &psz_destfile, "%s%s", psz_destdir, psz_tmpdestfile ) == -1 )
1205 p_file = utf8_fopen( psz_destfile, "w" );
1208 msg_Err( p_udt, "Failed to open %s for writing", psz_destfile );
1212 /* Create a buffer and fill it with the downloaded file */
1213 p_buffer = (void *)malloc( 1 << 10 );
1217 psz_size = size_str( l_size );
1218 if( asprintf( &psz_status, "%s\nDownloading... O.O/%s %.1f%% done", p_update->release.psz_url, psz_size, 0.0 ) != -1 )
1220 i_progress = intf_UserProgress( p_udt, "Downloading ...", psz_status, 0.0, 0 );
1224 while( ( i_read = stream_Read( p_stream, p_buffer, 1 << 10 ) ) &&
1225 !intf_ProgressIsCancelled( p_udt, i_progress ) )
1227 fwrite( p_buffer, i_read, 1, p_file );
1229 l_downloaded += i_read;
1230 psz_downloaded = size_str( l_downloaded );
1231 f_progress = 100.0*(float)l_downloaded/(float)l_size;
1233 if( asprintf( &psz_status, "%s\nDonwloading... %s/%s %.1f%% done", p_update->release.psz_url,
1234 psz_downloaded, psz_size, f_progress ) != -1 )
1236 intf_ProgressUpdate( p_udt, i_progress, psz_status, f_progress, 0 );
1239 free( psz_downloaded );
1242 /* Finish the progress bar or delete the file if the user had canceled */
1246 if( !intf_ProgressIsCancelled( p_udt, i_progress ) )
1248 if( asprintf( &psz_status, "%s\nDone %s (100.0%%)", p_update->release.psz_url, psz_size ) != -1 )
1250 intf_ProgressUpdate( p_udt, i_progress, psz_status, 100.0, 0 );
1256 utf8_unlink( psz_destfile );
1260 signature_packet_v3_t sign;
1261 if( download_signature( VLC_OBJECT( p_udt ), &sign,
1262 p_update->release.psz_url ) != VLC_SUCCESS )
1264 msg_Err( p_udt, "Couldn't download signature of downloaded file" );
1268 if( sign.type != BINARY_SIGNATURE )
1270 msg_Err( p_udt, "Invalid signature type" );
1274 uint8_t *p_hash = hash_sha1_from_file( psz_destfile, &sign );
1277 msg_Err( p_udt, "Unable to hash %s", psz_destfile );
1278 utf8_unlink( psz_destfile );
1282 if( p_hash[0] != sign.hash_verification[0] ||
1283 p_hash[1] != sign.hash_verification[1] )
1285 msg_Err( p_udt, "Bad SHA1 hash for %s", psz_destfile );
1286 utf8_unlink( psz_destfile );
1290 if( verify_signature( VLC_OBJECT(p_udt), sign.r, sign.s,
1291 &p_update->p_pkey->key, p_hash ) != VLC_SUCCESS )
1293 msg_Err( p_udt, "BAD SIGNATURE for %s", psz_destfile );
1295 utf8_unlink( psz_destfile );
1299 msg_Info( p_udt, "%s authenticated", psz_destfile );
1304 stream_Delete( p_stream );
1307 free( psz_destdir );
1308 free( psz_destfile );
1312 vlc_object_destroy( p_udt );