Xash3D FWGS engine.
 
 
 
 

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/*
identification.c - unique id generation
Copyright (C) 2017 mittorn
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
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 General Public License for more details.
*/
#include "common.h"
#include <fcntl.h>
#if !XASH_WIN32
#include <dirent.h>
#endif
static char id_md5[33];
static char id_customid[MAX_STRING];
/*
==========================================================
simple 64-bit one-hash-func bloom filter
should be enough to determine if device exist in identifier
==========================================================
*/
typedef uint64_t bloomfilter_t;
static bloomfilter_t id;
#define bf64_mask ((1U<<6)-1)
bloomfilter_t BloomFilter_Process( const char *buffer, int size )
{
dword crc32;
bloomfilter_t value = 0;
if( size <= 0 || size > 512 )
return 0;
CRC32_Init( &crc32 );
CRC32_ProcessBuffer( &crc32, buffer, size );
while( crc32 )
{
value |= ((uint64_t)1) << ( crc32 & bf64_mask );
crc32 = crc32 >> 6;
}
return value;
}
bloomfilter_t BloomFilter_ProcessStr( const char *buffer )
{
return BloomFilter_Process( buffer, Q_strlen( buffer ) );
}
uint BloomFilter_Weight( bloomfilter_t value )
{
int weight = 0;
while( value )
{
if( value & 1 )
weight++;
value = value >> 1;
#if _MSC_VER == 1200
value &= 0x7FFFFFFFFFFFFFFF;
#endif
}
return weight;
}
qboolean BloomFilter_ContainsString( bloomfilter_t filter, const char *str )
{
bloomfilter_t value = BloomFilter_ProcessStr( str );
return (filter & value) == value;
}
/*
=============================================
IDENTIFICATION
=============================================
*/
#define MAXBITS_GEN 30
#define MAXBITS_CHECK MAXBITS_GEN + 6
qboolean ID_ProcessFile( bloomfilter_t *value, const char *path );
void ID_BloomFilter_f( void )
{
bloomfilter_t value = 0;
int i;
for( i = 1; i < Cmd_Argc(); i++ )
value |= BloomFilter_ProcessStr( Cmd_Argv( i ) );
Msg( "%d %016llX\n", BloomFilter_Weight( value ), value );
// test
// for( i = 1; i < Cmd_Argc(); i++ )
// Msg( "%s: %d\n", Cmd_Argv( i ), BloomFilter_ContainsString( value, Cmd_Argv( i ) ) );
}
qboolean ID_VerifyHEX( const char *hex )
{
uint chars = 0;
char prev = 0;
qboolean monotonic = true; // detect 11:22...
int weight = 0;
while( *hex++ )
{
char ch = Q_tolower( *hex );
if( ( ch >= 'a' && ch <= 'f') || ( ch >= '0' && ch <= '9' ) )
{
if( prev && ( ch - prev < -1 || ch - prev > 1 ) )
monotonic = false;
if( ch >= 'a' )
chars |= 1 << (ch - 'a' + 10);
else
chars |= 1 << (ch - '0');
prev = ch;
}
}
if( monotonic )
return false;
while( chars )
{
if( chars & 1 )
weight++;
chars = chars >> 1;
if( weight > 2 )
return true;
}
return false;
}
void ID_VerifyHEX_f( void )
{
if( ID_VerifyHEX( Cmd_Argv( 1 ) ) )
Msg( "Good\n" );
else
Msg( "Bad\n" );
}
#if XASH_LINUX
qboolean ID_ProcessCPUInfo( bloomfilter_t *value )
{
int cpuinfofd = open( "/proc/cpuinfo", O_RDONLY );
char buffer[1024], *pbuf, *pbuf2;
int ret;
if( cpuinfofd < 0 )
return false;
if( (ret = read( cpuinfofd, buffer, 1023 ) ) < 0 )
return false;
close( cpuinfofd );
buffer[ret] = 0;
if( !ret )
return false;
pbuf = Q_strstr( buffer, "Serial" );
if( !pbuf )
return false;
pbuf += 6;
if( ( pbuf2 = Q_strchr( pbuf, '\n' ) ) )
*pbuf2 = 0;
else
pbuf2 = pbuf + Q_strlen( pbuf );
if( !ID_VerifyHEX( pbuf ) )
return false;
*value |= BloomFilter_Process( pbuf, pbuf2 - pbuf );
return true;
}
qboolean ID_ValidateNetDevice( const char *dev )
{
const char *prefix = "/sys/class/net";
byte *pfile;
int assignType;
// These devices are fake, their mac address is generated each boot, while assign_type is 0
if( !Q_strnicmp( dev, "ccmni", sizeof( "ccmni" ) ) ||
!Q_strnicmp( dev, "ifb", sizeof( "ifb" ) ) )
return false;
pfile = FS_LoadDirectFile( va( "%s/%s/addr_assign_type", prefix, dev ), NULL );
// if NULL, it may be old kernel
if( pfile )
{
assignType = Q_atoi( (char*)pfile );
Mem_Free( pfile );
// check is MAC address is constant
if( assignType != 0 )
return false;
}
return true;
}
int ID_ProcessNetDevices( bloomfilter_t *value )
{
const char *prefix = "/sys/class/net";
DIR *dir;
struct dirent *entry;
int count = 0;
if( !( dir = opendir( prefix ) ) )
return 0;
while( ( entry = readdir( dir ) ) && BloomFilter_Weight( *value ) < MAXBITS_GEN )
{
if( !Q_strcmp( entry->d_name, "." ) || !Q_strcmp( entry->d_name, ".." ) )
continue;
if( !ID_ValidateNetDevice( entry->d_name ) )
continue;
count += ID_ProcessFile( value, va( "%s/%s/address", prefix, entry->d_name ) );
}
closedir( dir );
return count;
}
int ID_CheckNetDevices( bloomfilter_t value )
{
const char *prefix = "/sys/class/net";
DIR *dir;
struct dirent *entry;
int count = 0;
bloomfilter_t filter = 0;
if( !( dir = opendir( prefix ) ) )
return 0;
while( ( entry = readdir( dir ) ) )
{
if( !Q_strcmp( entry->d_name, "." ) || !Q_strcmp( entry->d_name, ".." ) )
continue;
if( !ID_ValidateNetDevice( entry->d_name ) )
continue;
if( ID_ProcessFile( &filter, va( "%s/%s/address", prefix, entry->d_name ) ) )
count += ( value & filter ) == filter, filter = 0;
}
closedir( dir );
return count;
}
void ID_TestCPUInfo_f( void )
{
bloomfilter_t value = 0;
if( ID_ProcessCPUInfo( &value ) )
Msg( "Got %016llX\n", value );
else
Msg( "Could not get serial\n" );
}
#endif
qboolean ID_ProcessFile( bloomfilter_t *value, const char *path )
{
int fd = open( path, O_RDONLY );
char buffer[256];
int ret;
if( fd < 0 )
return false;
if( (ret = read( fd, buffer, 255 ) ) < 0 )
return false;
close( fd );
if( !ret )
return false;
buffer[ret] = 0;
if( !ID_VerifyHEX( buffer ) )
return false;
*value |= BloomFilter_Process( buffer, ret );
return true;
}
#if !XASH_WIN32
int ID_ProcessFiles( bloomfilter_t *value, const char *prefix, const char *postfix )
{
DIR *dir;
struct dirent *entry;
int count = 0;
if( !( dir = opendir( prefix ) ) )
return 0;
while( ( entry = readdir( dir ) ) && BloomFilter_Weight( *value ) < MAXBITS_GEN )
{
if( !Q_strcmp( entry->d_name, "." ) || !Q_strcmp( entry->d_name, ".." ) )
continue;
count += ID_ProcessFile( value, va( "%s/%s/%s", prefix, entry->d_name, postfix ) );
}
closedir( dir );
return count;
}
int ID_CheckFiles( bloomfilter_t value, const char *prefix, const char *postfix )
{
DIR *dir;
struct dirent *entry;
int count = 0;
bloomfilter_t filter = 0;
if( !( dir = opendir( prefix ) ) )
return 0;
while( ( entry = readdir( dir ) ) )
{
if( !Q_strcmp( entry->d_name, "." ) || !Q_strcmp( entry->d_name, ".." ) )
continue;
if( ID_ProcessFile( &filter, va( "%s/%s/%s", prefix, entry->d_name, postfix ) ) )
count += ( value & filter ) == filter, filter = 0;
}
closedir( dir );
return count;
}
#else
int ID_GetKeyData( HKEY hRootKey, char *subKey, char *value, LPBYTE data, DWORD cbData )
{
HKEY hKey;
if( RegOpenKeyEx( hRootKey, subKey, 0, KEY_QUERY_VALUE, &hKey ) != ERROR_SUCCESS )
return 0;
if( RegQueryValueEx( hKey, value, NULL, NULL, data, &cbData ) != ERROR_SUCCESS )
{
RegCloseKey( hKey );
return 0;
}
RegCloseKey( hKey );
return 1;
}
int ID_SetKeyData( HKEY hRootKey, char *subKey, DWORD dwType, char *value, LPBYTE data, DWORD cbData)
{
HKEY hKey;
if( RegCreateKey( hRootKey, subKey, &hKey ) != ERROR_SUCCESS )
return 0;
if( RegSetValueEx( hKey, value, 0, dwType, data, cbData ) != ERROR_SUCCESS )
{
RegCloseKey( hKey );
return 0;
}
RegCloseKey( hKey );
return 1;
}
#define BUFSIZE 4096
int ID_RunWMIC(char *buffer, const char *cmdline)
{
HANDLE g_IN_Rd = NULL;
HANDLE g_IN_Wr = NULL;
HANDLE g_OUT_Rd = NULL;
HANDLE g_OUT_Wr = NULL;
DWORD dwRead;
BOOL bSuccess = FALSE;
SECURITY_ATTRIBUTES saAttr;
STARTUPINFO si = {0};
PROCESS_INFORMATION pi = {0};
saAttr.nLength = sizeof(SECURITY_ATTRIBUTES);
saAttr.bInheritHandle = TRUE;
saAttr.lpSecurityDescriptor = NULL;
CreatePipe( &g_IN_Rd, &g_IN_Wr, &saAttr, 0 );
CreatePipe( &g_OUT_Rd, &g_OUT_Wr, &saAttr, 0 );
SetHandleInformation( g_IN_Wr, HANDLE_FLAG_INHERIT, 0 );
si.cb = sizeof(STARTUPINFO);
si.dwFlags = STARTF_USESTDHANDLES;
si.hStdInput = g_IN_Rd;
si.hStdOutput = g_OUT_Wr;
si.hStdError = g_OUT_Wr;
si.wShowWindow = SW_HIDE;
si.dwFlags |= STARTF_USESTDHANDLES;
CreateProcess( NULL, (char*)cmdline, NULL, NULL, true, CREATE_NO_WINDOW , NULL, NULL, &si, &pi );
CloseHandle( g_OUT_Wr );
CloseHandle( g_IN_Wr );
WaitForSingleObject( pi.hProcess, 500 );
bSuccess = ReadFile( g_OUT_Rd, buffer, BUFSIZE, &dwRead, NULL );
buffer[BUFSIZE-1] = 0;
CloseHandle( g_IN_Rd );
CloseHandle( g_OUT_Rd );
return bSuccess;
}
int ID_ProcessWMIC( bloomfilter_t *value, const char *cmdline )
{
char buffer[BUFSIZE], token[BUFSIZE], *pbuf;
int count = 0;
if( !ID_RunWMIC( buffer, cmdline ) )
return 0;
pbuf = COM_ParseFile( buffer, token, sizeof( token )); // Header
while( pbuf = COM_ParseFile( pbuf, token, sizeof( token ) ) )
{
if( !ID_VerifyHEX( token ) )
continue;
*value |= BloomFilter_ProcessStr( token );
count ++;
}
return count;
}
int ID_CheckWMIC( bloomfilter_t value, const char *cmdline )
{
char buffer[BUFSIZE], token[BUFSIZE], *pbuf;
int count = 0;
if( !ID_RunWMIC( buffer, cmdline ) )
return 0;
pbuf = COM_ParseFile( buffer, token, sizeof( token )); // Header
while( pbuf = COM_ParseFile( pbuf, token, sizeof( token ) ) )
{
bloomfilter_t filter;
if( !ID_VerifyHEX( token ) )
continue;
filter = BloomFilter_ProcessStr( token );
count += ( filter & value ) == filter;
}
return count;
}
#endif
#if XASH_IOS
char *IOS_GetUDID( void );
#endif
bloomfilter_t ID_GenerateRawId( void )
{
bloomfilter_t value = 0;
int count = 0;
#if XASH_LINUX
#if XASH_ANDROID && !XASH_DEDICATED
{
const char *androidid = Android_GetAndroidID();
if( androidid && ID_VerifyHEX( androidid ) )
{
value |= BloomFilter_ProcessStr( androidid );
count ++;
}
}
#endif
count += ID_ProcessCPUInfo( &value );
count += ID_ProcessFiles( &value, "/sys/block", "device/cid" );
count += ID_ProcessNetDevices( &value );
#endif
#if XASH_WIN32
count += ID_ProcessWMIC( &value, "wmic path win32_physicalmedia get SerialNumber " );
count += ID_ProcessWMIC( &value, "wmic bios get serialnumber " );
#endif
#if XASH_IOS
{
value |= BloomFilter_ProcessStr(IOS_GetUDID());
count ++;
}
#endif
return value;
}
uint ID_CheckRawId( bloomfilter_t filter )
{
bloomfilter_t value = 0;
int count = 0;
#if XASH_LINUX
#if XASH_ANDROID && !XASH_DEDICATED
{
const char *androidid = Android_GetAndroidID();
if( androidid && ID_VerifyHEX( androidid ) )
{
value = BloomFilter_ProcessStr( androidid );
count += (filter & value) == value;
value = 0;
}
}
#endif
count += ID_CheckNetDevices( filter );
count += ID_CheckFiles( filter, "/sys/block", "device/cid" );
if( ID_ProcessCPUInfo( &value ) )
count += (filter & value) == value;
#endif
#if XASH_WIN32
count += ID_CheckWMIC( filter, "wmic path win32_physicalmedia get SerialNumber" );
count += ID_CheckWMIC( filter, "wmic bios get serialnumber" );
#endif
#if XASH_IOS
{
value = BloomFilter_ProcessStr(IOS_GetUDID());
count += (filter & value) == value;
value = 0;
}
#endif
#if 0
Msg( "ID_CheckRawId: %d\n", count );
#endif
return count;
}
#define SYSTEM_XOR_MASK 0x10331c2dce4c91db
#define GAME_XOR_MASK 0x7ffc48fbac1711f1
void ID_Check( void )
{
uint weight = BloomFilter_Weight( id );
uint mincount = weight >> 2;
if( mincount < 1 )
mincount = 1;
if( weight > MAXBITS_CHECK )
{
id = 0;
#if 0
Msg( "ID_Check(): fail %d\n", weight );
#endif
return;
}
if( ID_CheckRawId( id ) < mincount )
id = 0;
#if 0
Msg( "ID_Check(): success %d\n", weight );
#endif
}
const char *ID_GetMD5( void )
{
if( id_customid[0] )
return id_customid;
return id_md5;
}
/*
===============
ID_SetCustomClientID
===============
*/
void GAME_EXPORT ID_SetCustomClientID( const char *id )
{
if( !id )
return;
Q_strncpy( id_customid, id, sizeof( id_customid ) );
}
void ID_Init( void )
{
MD5Context_t hash = {0};
byte md5[16];
int i;
Cmd_AddRestrictedCommand( "bloomfilter", ID_BloomFilter_f, "print bloomfilter raw value of arguments set");
Cmd_AddRestrictedCommand( "verifyhex", ID_VerifyHEX_f, "check if id source seems to be fake" );
#if XASH_LINUX
Cmd_AddRestrictedCommand( "testcpuinfo", ID_TestCPUInfo_f, "try read cpu serial" );
#endif
#if XASH_ANDROID && !XASH_DEDICATED
sscanf( Android_LoadID(), "%016llX", &id );
if( id )
{
id ^= SYSTEM_XOR_MASK;
ID_Check();
}
#elif XASH_WIN32
{
CHAR szBuf[MAX_PATH];
ID_GetKeyData( HKEY_CURRENT_USER, "Software\\Xash3D\\", "xash_id", szBuf, MAX_PATH );
sscanf(szBuf, "%016llX", &id);
id ^= SYSTEM_XOR_MASK;
ID_Check();
}
#else
{
const char *home = getenv( "HOME" );
if( COM_CheckString( home ) )
{
FILE *cfg = fopen( va( "%s/.config/.xash_id", home ), "r" );
if( !cfg )
cfg = fopen( va( "%s/.local/.xash_id", home ), "r" );
if( !cfg )
cfg = fopen( va( "%s/.xash_id", home ), "r" );
if( cfg )
{
if( fscanf( cfg, "%016llX", &id ) > 0 )
{
id ^= SYSTEM_XOR_MASK;
ID_Check();
}
fclose( cfg );
}
}
}
#endif
if( !id )
{
const char *buf = (const char*) FS_LoadFile( ".xash_id", NULL, false );
if( buf )
{
sscanf( buf, "%016llX", &id );
id ^= GAME_XOR_MASK;
ID_Check();
}
}
if( !id )
id = ID_GenerateRawId();
MD5Init( &hash );
MD5Update( &hash, (byte *)&id, sizeof( id ) );
MD5Final( (byte*)md5, &hash );
for( i = 0; i < 16; i++ )
Q_sprintf( &id_md5[i*2], "%02hhx", md5[i] );
#if XASH_ANDROID && !XASH_DEDICATED
Android_SaveID( va("%016llX", id^SYSTEM_XOR_MASK ) );
#elif XASH_WIN32
{
CHAR Buf[MAX_PATH];
sprintf( Buf, "%016llX", id^SYSTEM_XOR_MASK );
ID_SetKeyData( HKEY_CURRENT_USER, "Software\\Xash3D\\", REG_SZ, "xash_id", Buf, Q_strlen(Buf) );
}
#else
{
const char *home = getenv( "HOME" );
if( COM_CheckString( home ) )
{
FILE *cfg = fopen( va( "%s/.config/.xash_id", home ), "w" );
if( !cfg )
cfg = fopen( va( "%s/.local/.xash_id", home ), "w" );
if( !cfg )
cfg = fopen( va( "%s/.xash_id", home ), "w" );
if( cfg )
{
fprintf( cfg, "%016llX", id^SYSTEM_XOR_MASK );
fclose( cfg );
}
}
}
#endif
FS_WriteFile( ".xash_id", va("%016llX", id^GAME_XOR_MASK), 16 );
#if 0
Msg("MD5 id: %s\nRAW id:%016llX\n", id_md5, id );
#endif
}