Revision b42a03ff217eb757f5a79a2f71cfe9b59ad3c18d authored by Francois Cartegnie on 10 March 2016, 10:52:02 UTC, committed by Francois Cartegnie on 10 March 2016, 10:52:23 UTC
1 parent 994b93c
update.c
/*****************************************************************************
* update.c: VLC update checking and downloading
*****************************************************************************
* Copyright © 2005-2008 VLC authors and VideoLAN
* $Id$
*
* Authors: Antoine Cellerier <dionoea -at- videolan -dot- org>
* Rémi Duraffort <ivoire at via.ecp.fr>
Rafaël Carré <funman@videolanorg>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either release 2 of the License, or
* (at your option) any later release.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/**
* \file
* This file contains functions related to VLC update management
*/
/*****************************************************************************
* Preamble
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <vlc_common.h>
#include <vlc_update.h>
#ifdef UPDATE_CHECK
#include <assert.h>
#include <vlc_pgpkey.h>
#include <vlc_stream.h>
#include <vlc_strings.h>
#include <vlc_fs.h>
#include <vlc_dialog.h>
#include <vlc_interface.h>
#include <gcrypt.h>
#include <vlc_gcrypt.h>
#ifdef _WIN32
#include <shellapi.h>
#endif
#include "update.h"
#include "../libvlc.h"
/*****************************************************************************
* Misc defines
*****************************************************************************/
/*
* Here is the format of these "status files" :
* First line is the last version: "X.Y.Z.E" where:
* * X is the major number
* * Y is the minor number
* * Z is the revision number
* * .E is an OPTIONAL extra number
* * IE "1.2.0" or "1.1.10.1"
* Second line is a url of the binary for this last version
* Remaining text is a required description of the update
*/
#if defined( _WIN64 )
# define UPDATE_OS_SUFFIX "-win-x64"
#elif defined( _WIN32 )
# define UPDATE_OS_SUFFIX "-win-x86"
#else
# define UPDATE_OS_SUFFIX ""
#endif
#ifndef NDEBUG
# define UPDATE_VLC_STATUS_URL "http://update-test.videolan.org/vlc/status-win-x86"
#else
# define UPDATE_VLC_STATUS_URL "http://update.videolan.org/vlc/status" UPDATE_OS_SUFFIX
#endif
#define dialog_FatalWait( p_obj, psz_title, psz_fmt, ... ) \
vlc_dialog_wait_question( p_obj, VLC_DIALOG_QUESTION_CRITICAL, "OK", NULL, \
NULL, psz_title, psz_fmt, ##__VA_ARGS__ );
/*****************************************************************************
* Update_t functions
*****************************************************************************/
#undef update_New
/**
* Create a new update VLC struct
*
* \param p_this the calling vlc_object
* \return pointer to new update_t or NULL
*/
update_t *update_New( vlc_object_t *p_this )
{
update_t *p_update;
assert( p_this );
p_update = (update_t *)malloc( sizeof( update_t ) );
if( !p_update ) return NULL;
vlc_mutex_init( &p_update->lock );
p_update->p_libvlc = p_this->p_libvlc;
p_update->release.psz_url = NULL;
p_update->release.psz_desc = NULL;
p_update->p_download = NULL;
p_update->p_check = NULL;
p_update->p_pkey = NULL;
vlc_gcrypt_init();
return p_update;
}
/**
* Delete an update_t struct
*
* \param p_update update_t* pointer
* \return nothing
*/
void update_Delete( update_t *p_update )
{
assert( p_update );
if( p_update->p_check )
{
vlc_join( p_update->p_check->thread, NULL );
free( p_update->p_check );
}
if( p_update->p_download )
{
atomic_store( &p_update->p_download->aborted, true );
vlc_join( p_update->p_download->thread, NULL );
vlc_object_release( p_update->p_download );
}
vlc_mutex_destroy( &p_update->lock );
free( p_update->release.psz_url );
free( p_update->release.psz_desc );
free( p_update->p_pkey );
free( p_update );
}
/**
* Empty the release struct
*
* \param p_update update_t* pointer
* \return nothing
*/
static void EmptyRelease( update_t *p_update )
{
p_update->release.i_major = 0;
p_update->release.i_minor = 0;
p_update->release.i_revision = 0;
FREENULL( p_update->release.psz_url );
FREENULL( p_update->release.psz_desc );
}
/**
* Get the update file and parse it
* p_update has to be locked when calling this function
*
* \param p_update pointer to update struct
* \return true if the update is valid and authenticated
*/
static bool GetUpdateFile( update_t *p_update )
{
stream_t *p_stream = NULL;
char *psz_version_line = NULL;
char *psz_update_data = NULL;
p_stream = stream_UrlNew( p_update->p_libvlc, UPDATE_VLC_STATUS_URL );
if( !p_stream )
{
msg_Err( p_update->p_libvlc, "Failed to open %s for reading",
UPDATE_VLC_STATUS_URL );
goto error;
}
uint64_t i_read;
if( stream_GetSize( p_stream, &i_read ) || i_read >= UINT16_MAX )
{
msg_Err(p_update->p_libvlc, "Status file too large");
goto error;
}
psz_update_data = malloc( i_read + 1 ); /* terminating '\0' */
if( !psz_update_data )
goto error;
if( stream_Read( p_stream, psz_update_data, i_read ) != (ssize_t)i_read )
{
msg_Err( p_update->p_libvlc, "Couldn't download update file %s",
UPDATE_VLC_STATUS_URL );
goto error;
}
psz_update_data[i_read] = '\0';
stream_Delete( p_stream );
p_stream = NULL;
/* first line : version number */
char *psz_update_data_parser = psz_update_data;
size_t i_len = strcspn( psz_update_data, "\r\n" );
psz_update_data_parser += i_len;
while( *psz_update_data_parser == '\r' || *psz_update_data_parser == '\n' )
psz_update_data_parser++;
if( !(psz_version_line = malloc( i_len + 1)) )
goto error;
strncpy( psz_version_line, psz_update_data, i_len );
psz_version_line[i_len] = '\0';
p_update->release.i_extra = 0;
int ret = sscanf( psz_version_line, "%i.%i.%i.%i",
&p_update->release.i_major, &p_update->release.i_minor,
&p_update->release.i_revision, &p_update->release.i_extra);
if( ret != 3 && ret != 4 )
{
msg_Err( p_update->p_libvlc, "Update version false formated" );
goto error;
}
/* second line : URL */
i_len = strcspn( psz_update_data_parser, "\r\n" );
if( i_len == 0 )
{
msg_Err( p_update->p_libvlc, "Update file %s is corrupted: URL missing",
UPDATE_VLC_STATUS_URL );
goto error;
}
if( !(p_update->release.psz_url = malloc( i_len + 1)) )
goto error;
strncpy( p_update->release.psz_url, psz_update_data_parser, i_len );
p_update->release.psz_url[i_len] = '\0';
psz_update_data_parser += i_len;
while( *psz_update_data_parser == '\r' || *psz_update_data_parser == '\n' )
psz_update_data_parser++;
/* Remaining data : description */
i_len = strlen( psz_update_data_parser );
if( i_len == 0 )
{
msg_Err( p_update->p_libvlc,
"Update file %s is corrupted: description missing",
UPDATE_VLC_STATUS_URL );
goto error;
}
if( !(p_update->release.psz_desc = malloc( i_len + 1)) )
goto error;
strncpy( p_update->release.psz_desc, psz_update_data_parser, i_len );
p_update->release.psz_desc[i_len] = '\0';
/* Now that we know the status is valid, we must download its signature
* to authenticate it */
signature_packet_t sign;
if( download_signature( VLC_OBJECT( p_update->p_libvlc ), &sign,
UPDATE_VLC_STATUS_URL ) != VLC_SUCCESS )
{
msg_Err( p_update->p_libvlc, "Couldn't download signature of status file" );
goto error;
}
if( sign.type != BINARY_SIGNATURE && sign.type != TEXT_SIGNATURE )
{
msg_Err( p_update->p_libvlc, "Invalid signature type" );
goto error;
}
p_update->p_pkey = (public_key_t*)malloc( sizeof( public_key_t ) );
if( !p_update->p_pkey )
goto error;
if( parse_public_key( videolan_public_key, sizeof( videolan_public_key ),
p_update->p_pkey, NULL ) != VLC_SUCCESS )
{
msg_Err( p_update->p_libvlc, "Couldn't parse embedded public key, something went really wrong..." );
FREENULL( p_update->p_pkey );
goto error;
}
memcpy( p_update->p_pkey->longid, videolan_public_key_longid, 8 );
if( memcmp( sign.issuer_longid, p_update->p_pkey->longid , 8 ) != 0 )
{
msg_Dbg( p_update->p_libvlc, "Need to download the GPG key" );
public_key_t *p_new_pkey = download_key(
VLC_OBJECT(p_update->p_libvlc),
sign.issuer_longid, videolan_public_key_longid );
if( !p_new_pkey )
{
msg_Err( p_update->p_libvlc, "Couldn't download GPG key" );
FREENULL( p_update->p_pkey );
goto error;
}
uint8_t *p_hash = hash_from_public_key( p_new_pkey );
if( !p_hash )
{
msg_Err( p_update->p_libvlc, "Failed to hash signature" );
free( p_new_pkey );
FREENULL( p_update->p_pkey );
goto error;
}
if( verify_signature( &p_new_pkey->sig,
&p_update->p_pkey->key, p_hash ) == VLC_SUCCESS )
{
free( p_hash );
msg_Info( p_update->p_libvlc, "Key authenticated" );
free( p_update->p_pkey );
p_update->p_pkey = p_new_pkey;
}
else
{
free( p_hash );
msg_Err( p_update->p_libvlc, "Key signature invalid !" );
goto error;
}
}
uint8_t *p_hash = hash_from_text( psz_update_data, &sign );
if( !p_hash )
{
msg_Warn( p_update->p_libvlc, "Can't compute hash for status file" );
goto error;
}
else if( p_hash[0] != sign.hash_verification[0] ||
p_hash[1] != sign.hash_verification[1] )
{
msg_Warn( p_update->p_libvlc, "Bad hash for status file" );
free( p_hash );
goto error;
}
else if( verify_signature( &sign, &p_update->p_pkey->key, p_hash )
!= VLC_SUCCESS )
{
msg_Err( p_update->p_libvlc, "BAD SIGNATURE for status file" );
free( p_hash );
goto error;
}
else
{
msg_Info( p_update->p_libvlc, "Status file authenticated" );
free( p_hash );
free( psz_version_line );
free( psz_update_data );
return true;
}
error:
if( p_stream )
stream_Delete( p_stream );
free( psz_version_line );
free( psz_update_data );
return false;
}
static void* update_CheckReal( void * );
/**
* Check for updates
*
* \param p_update pointer to update struct
* \param pf_callback pointer to a function to call when the update_check is finished
* \param p_data pointer to some datas to give to the callback
* \returns nothing
*/
void update_Check( update_t *p_update, void (*pf_callback)( void*, bool ), void *p_data )
{
assert( p_update );
// If the object already exist, destroy it
if( p_update->p_check )
{
vlc_join( p_update->p_check->thread, NULL );
free( p_update->p_check );
}
update_check_thread_t *p_uct = calloc( 1, sizeof( *p_uct ) );
if( !p_uct ) return;
p_uct->p_update = p_update;
p_update->p_check = p_uct;
p_uct->pf_callback = pf_callback;
p_uct->p_data = p_data;
vlc_clone( &p_uct->thread, update_CheckReal, p_uct, VLC_THREAD_PRIORITY_LOW );
}
void* update_CheckReal( void *obj )
{
update_check_thread_t *p_uct = (update_check_thread_t *)obj;
bool b_ret;
int canc;
canc = vlc_savecancel ();
vlc_mutex_lock( &p_uct->p_update->lock );
EmptyRelease( p_uct->p_update );
b_ret = GetUpdateFile( p_uct->p_update );
vlc_mutex_unlock( &p_uct->p_update->lock );
if( p_uct->pf_callback )
(p_uct->pf_callback)( p_uct->p_data, b_ret );
vlc_restorecancel (canc);
return NULL;
}
bool update_NeedUpgrade( update_t *p_update )
{
assert( p_update );
static const int current[4] = {
PACKAGE_VERSION_MAJOR,
PACKAGE_VERSION_MINOR,
PACKAGE_VERSION_REVISION,
PACKAGE_VERSION_EXTRA
};
const int latest[4] = {
p_update->release.i_major,
p_update->release.i_minor,
p_update->release.i_revision,
p_update->release.i_extra
};
for (unsigned i = 0; i < sizeof latest / sizeof *latest; i++) {
/* there is a new version available */
if (latest[i] > current[i])
return true;
/* current version is more recent than the latest version ?! */
if (latest[i] < current[i])
return false;
}
/* current version is not a release, it's a -git or -rc version */
if (*PACKAGE_VERSION_DEV)
return true;
/* current version is latest version */
return false;
}
/**
* Convert a long int size in bytes to a string
*
* \param l_size the size in bytes
* \return the size as a string
*/
static char *size_str( uint64_t l_size )
{
char *psz_tmp = NULL;
int i_retval = 0;
if( l_size >> 30 )
i_retval = asprintf( &psz_tmp, _("%.1f GiB"), (float)l_size/(1<<30) );
else if( l_size >> 20 )
i_retval = asprintf( &psz_tmp, _("%.1f MiB"), (float)l_size/(1<<20) );
else if( l_size >> 10 )
i_retval = asprintf( &psz_tmp, _("%.1f KiB"), (float)l_size/(1<<10) );
else
i_retval = asprintf( &psz_tmp, _("%"PRIu64" B"), l_size );
return i_retval == -1 ? NULL : psz_tmp;
}
static void* update_DownloadReal( void * );
/**
* Download the file given in the update_t
*
* \param p_update structure
* \param dir to store the download file
* \return nothing
*/
void update_Download( update_t *p_update, const char *psz_destdir )
{
assert( p_update );
// If the object already exist, destroy it
if( p_update->p_download )
{
atomic_store( &p_update->p_download->aborted, true );
vlc_join( p_update->p_download->thread, NULL );
vlc_object_release( p_update->p_download );
}
update_download_thread_t *p_udt =
vlc_custom_create( p_update->p_libvlc, sizeof( *p_udt ),
"update download" );
if( !p_udt )
return;
p_udt->p_update = p_update;
p_update->p_download = p_udt;
p_udt->psz_destdir = psz_destdir ? strdup( psz_destdir ) : NULL;
atomic_store(&p_udt->aborted, false);
vlc_clone( &p_udt->thread, update_DownloadReal, p_udt, VLC_THREAD_PRIORITY_LOW );
}
static void* update_DownloadReal( void *obj )
{
update_download_thread_t *p_udt = (update_download_thread_t *)obj;
uint64_t l_size;
uint64_t l_downloaded = 0;
float f_progress;
char *psz_downloaded = NULL;
char *psz_size = NULL;
char *psz_destfile = NULL;
char *psz_tmpdestfile = NULL;
FILE *p_file = NULL;
stream_t *p_stream = NULL;
void* p_buffer = NULL;
int i_read;
int canc;
vlc_dialog_id *p_dialog_id = NULL;
update_t *p_update = p_udt->p_update;
char *psz_destdir = p_udt->psz_destdir;
msg_Dbg( p_udt, "Opening Stream '%s'", p_update->release.psz_url );
canc = vlc_savecancel ();
/* Open the stream */
p_stream = stream_UrlNew( p_udt, p_update->release.psz_url );
if( !p_stream )
{
msg_Err( p_udt, "Failed to open %s for reading", p_update->release.psz_url );
goto end;
}
/* Get the stream size */
if( stream_GetSize( p_stream, &l_size ) || l_size == 0 )
goto end;
/* Get the file name and open it*/
psz_tmpdestfile = strrchr( p_update->release.psz_url, '/' );
if( !psz_tmpdestfile )
{
msg_Err( p_udt, "The URL %s is badly formated",
p_update->release.psz_url );
goto end;
}
psz_tmpdestfile++;
if( asprintf( &psz_destfile, "%s%s", psz_destdir, psz_tmpdestfile ) == -1 )
goto end;
p_file = vlc_fopen( psz_destfile, "w" );
if( !p_file )
{
msg_Err( p_udt, "Failed to open %s for writing", psz_destfile );
dialog_FatalWait( p_udt, _("Saving file failed"),
_("Failed to open \"%s\" for writing"),
psz_destfile );
goto end;
}
/* Create a buffer and fill it with the downloaded file */
p_buffer = (void *)malloc( 1 << 10 );
if( unlikely(p_buffer == NULL) )
goto end;
msg_Dbg( p_udt, "Downloading Stream '%s'", p_update->release.psz_url );
psz_size = size_str( l_size );
p_dialog_id =
vlc_dialog_display_progress( p_udt, false, 0.0, _("Cancel"),
( "Downloading..."),
_("%s\nDownloading... %s/%s %.1f%% done"),
p_update->release.psz_url, "0.0", psz_size,
0.0 );
if( p_dialog_id == NULL )
goto end;
while( !atomic_load( &p_udt->aborted ) &&
( i_read = stream_Read( p_stream, p_buffer, 1 << 10 ) ) &&
!vlc_dialog_is_cancelled( p_udt, p_dialog_id ) )
{
if( fwrite( p_buffer, i_read, 1, p_file ) < 1 )
{
msg_Err( p_udt, "Failed to write into %s", psz_destfile );
break;
}
l_downloaded += i_read;
psz_downloaded = size_str( l_downloaded );
f_progress = (float)l_downloaded/(float)l_size;
vlc_dialog_update_progress_text( p_udt, p_dialog_id, f_progress,
"%s\nDownloading... %s/%s - %.1f%% done",
p_update->release.psz_url,
psz_downloaded, psz_size,
f_progress*100 );
free( psz_downloaded );
}
/* Finish the progress bar or delete the file if the user had canceled */
fclose( p_file );
p_file = NULL;
if( !atomic_load( &p_udt->aborted ) &&
!vlc_dialog_is_cancelled( p_udt, p_dialog_id ) )
{
vlc_dialog_release( p_udt, p_dialog_id );
p_dialog_id = NULL;
}
else
{
vlc_unlink( psz_destfile );
goto end;
}
signature_packet_t sign;
if( download_signature( VLC_OBJECT( p_udt ), &sign,
p_update->release.psz_url ) != VLC_SUCCESS )
{
vlc_unlink( psz_destfile );
dialog_FatalWait( p_udt, _("File could not be verified"),
_("It was not possible to download a cryptographic signature for "
"the downloaded file \"%s\". Thus, it was deleted."),
psz_destfile );
msg_Err( p_udt, "Couldn't download signature of downloaded file" );
goto end;
}
if( memcmp( sign.issuer_longid, p_update->p_pkey->longid, 8 ) )
{
vlc_unlink( psz_destfile );
msg_Err( p_udt, "Invalid signature issuer" );
dialog_FatalWait( p_udt, _("Invalid signature"),
_("The cryptographic signature for the downloaded file \"%s\" was "
"invalid and could not be used to securely verify it. Thus, the "
"file was deleted."),
psz_destfile );
goto end;
}
if( sign.type != BINARY_SIGNATURE )
{
vlc_unlink( psz_destfile );
msg_Err( p_udt, "Invalid signature type" );
dialog_FatalWait( p_udt, _("Invalid signature"),
_("The cryptographic signature for the downloaded file \"%s\" was "
"invalid and could not be used to securely verify it. Thus, the "
"file was deleted."),
psz_destfile );
goto end;
}
uint8_t *p_hash = hash_from_file( psz_destfile, &sign );
if( !p_hash )
{
msg_Err( p_udt, "Unable to hash %s", psz_destfile );
vlc_unlink( psz_destfile );
dialog_FatalWait( p_udt, _("File not verifiable"),
_("It was not possible to securely verify the downloaded file"
" \"%s\". Thus, it was deleted."),
psz_destfile );
goto end;
}
if( p_hash[0] != sign.hash_verification[0] ||
p_hash[1] != sign.hash_verification[1] )
{
vlc_unlink( psz_destfile );
dialog_FatalWait( p_udt, _("File corrupted"),
_("Downloaded file \"%s\" was corrupted. Thus, it was deleted."),
psz_destfile );
msg_Err( p_udt, "Bad hash for %s", psz_destfile );
free( p_hash );
goto end;
}
if( verify_signature( &sign, &p_update->p_pkey->key, p_hash )
!= VLC_SUCCESS )
{
vlc_unlink( psz_destfile );
dialog_FatalWait( p_udt, _("File corrupted"),
_("Downloaded file \"%s\" was corrupted. Thus, it was deleted."),
psz_destfile );
msg_Err( p_udt, "BAD SIGNATURE for %s", psz_destfile );
free( p_hash );
goto end;
}
msg_Info( p_udt, "%s authenticated", psz_destfile );
free( p_hash );
#ifdef _WIN32
const char *psz_msg =
_("The new version was successfully downloaded."
"Do you want to close VLC and install it now?");
int answer = vlc_dialog_wait_question( p_udt, VLC_DIALOG_QUESTION_NORMAL,
_("Cancel"), _("Install"), NULL,
_("Update VLC media player"), "%s",
psz_msg );
if(answer == 1)
{
wchar_t psz_wdestfile[MAX_PATH];
MultiByteToWideChar( CP_UTF8, 0, psz_destfile, -1, psz_wdestfile, MAX_PATH );
answer = (int)ShellExecuteW( NULL, L"open", psz_wdestfile, NULL, NULL, SW_SHOW);
if(answer > 32)
libvlc_Quit(p_udt->p_libvlc);
}
#endif
end:
if( p_dialog_id != NULL )
vlc_dialog_release( p_udt, p_dialog_id );
if( p_stream )
stream_Delete( p_stream );
if( p_file )
fclose( p_file );
free( psz_destdir );
free( psz_destfile );
free( p_buffer );
free( psz_size );
vlc_restorecancel( canc );
return NULL;
}
update_release_t *update_GetRelease( update_t *p_update )
{
return &p_update->release;
}
#else
#undef update_New
update_t *update_New( vlc_object_t *p_this )
{
(void)p_this;
return NULL;
}
void update_Delete( update_t *p_update )
{
(void)p_update;
}
void update_Check( update_t *p_update, void (*pf_callback)( void*, bool ),
void *p_data )
{
(void)p_update; (void)pf_callback; (void)p_data;
}
bool update_NeedUpgrade( update_t *p_update )
{
(void)p_update;
return false;
}
void update_Download( update_t *p_update, const char *psz_destdir )
{
(void)p_update; (void)psz_destdir;
}
update_release_t *update_GetRelease( update_t *p_update )
{
(void)p_update;
return NULL;
}
#endif
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