char * zuluCryptLoopDeviceAddress_1( const char * device )
{
int fd ;
char * path ;
struct loop_info64 l_info ;
string_t st = String_1( "/sys/block/",device + 5,"/loop/backing_file",NULL ) ;
string_t xt = _StringGetFromVirtualFile( &st ) ;
if( xt == StringVoid ){
memset( &l_info,'\0',sizeof( struct loop_info64 ) ) ;
fd = open( device,O_RDONLY ) ;
ioctl( fd,LOOP_GET_STATUS64,&l_info ) ;
path = zuluCryptRealPath( ( char * ) l_info.lo_file_name ) ;
close( fd ) ;
return path ;
}else{
StringRemoveRight( xt,1 ) ;
return StringDeleteHandle( &xt ) ;
}
}
string_t zuluCryptLoopDeviceAddress_2( const char * device )
{
int fd ;
char * path ;
struct loop_info64 l_info ;
string_t st = String_1( "/sys/block/",device + 5,"/loop/backing_file",NULL ) ;
string_t xt = _StringGetFromVirtualFile( &st ) ;
if( xt == StringVoid ){
memset( &l_info,'\0',sizeof( struct loop_info64 ) ) ;
fd = open( device,O_RDONLY ) ;
ioctl( fd,LOOP_GET_STATUS64,&l_info ) ;
path = zuluCryptRealPath( ( char * ) l_info.lo_file_name ) ;
close( fd ) ;
xt = StringInherit( &path ) ;
}else{
StringRemoveRight( xt,1 ) ;
}
/*
* zuluCryptEncodeMountEntry() is defined in mount_volume.c
*/
zuluCryptEncodeMountEntry( xt ) ;
return xt ;
}
static stringList_t _zuluCryptAddMDRAIDVolumes( stringList_t stl )
{
DIR * dir = opendir( "/dev/md/" ) ;
struct dirent * entry ;
char * e ;
const char * f ;
string_t st ;
if( dir != NULL ){
while( ( entry = readdir( dir ) ) != NULL ){
f = entry->d_name ;
if( !StringAtLeastOneMatch_1( f,".","..","md-device-map",NULL ) ){
st = String( "/dev/md/" ) ;
e = zuluCryptRealPath( StringAppend( st,f ) ) ;
if( e != NULL ){
StringListRemoveString( stl,e ) ;
StringFree( e ) ;
}
stl = StringListAppendString_1( stl,&st ) ;
}
}
closedir( dir ) ;
}
return stl ;
}
char * zuluCryptResolvePath( const char * path )
{
char * e ;
char * f ;
if( StringsAreEqual( path,"/dev/root" ) ){
e = _zuluCryptResolveDevRoot() ;
if( e == NULL ){
return StringCopy_2( path ) ;
}else{
return e ;
}
}else if( StringPrefixEqual( path,"/dev/disk/by-" ) ){
/*
* zuluCryptRealPath() is defined in real_path.c
*/
e = zuluCryptRealPath( path ) ;
if( e == NULL ){
return StringCopy_2( path ) ;
}else{
if( StringPrefixEqual( e,"/dev/mapper/" ) ){
f = _convert_if_path_is_lvm( e ) ;
StringFree( e ) ;
return f ;
}else{
return e ;
}
}
}else if( StringPrefixEqual( path,"/dev/mapper/" ) ){
return _convert_if_path_is_lvm( path ) ;
}else if( StringPrefixEqual( path,"/dev/md" ) ){
return zuluCryptResolveMDPath( path ) ;
}else if( StringPrefixEqual( path,"/dev/dm-" ) ){
return zuluCryptResolveDMPath( path ) ;
}else if( StringPrefixEqual( path,"/dev/loop" ) ){
/*
* zuluCryptLoopDeviceAddress() is defined in create_loop_device.c
*/
return zuluCryptLoopDeviceAddress( path ) ;
}else{
return StringCopy_2( path ) ;
}
}
/*
* dm path is a path like "/dev/dm-5".
* this routine will transform the path to /dev/abc/def if the path is
* an lvm path or to /dev/mapper/xyz if the volume is any other device manager volume.
*/
char * zuluCryptResolveDMPath( const char * path )
{
char * e = zuluCryptRealPath( path ) ;
char * f = _convert_if_path_is_lvm( e ) ;
StringFree( e ) ;
return f ;
}
char * zuluCryptGetFileNameFromFileDescriptor( int fd )
{
char * e ;
char * c ;
string_t xt = String( "/proc/self/fd/" ) ;
e = zuluCryptRealPath( StringAppendInt( xt,fd ) ) ;
/*
* zuluCryptResolvePath_4() is defined in resolve_paths.c
*/
c = zuluCryptResolvePath_4( e ) ;
StringFree( e ) ;
StringDelete( &xt ) ;
return c ;
}
/*
* raid path can be in format /dev/mdX or /dev/md/X.
* We prefer the latter and if given the former,convert it to the latter if possible
*/
string_t zuluCryptResolveMDPath_1( const char * path )
{
struct dirent * entry ;
char * e ;
const char * f = "/dev/md/" ;
DIR * dir = opendir( f ) ;
string_t st = String( f ) ;
if( dir != NULL ){
while( ( entry = readdir( dir ) ) != NULL ){
f = entry->d_name ;
if( !StringAtLeastOneMatch_1( f,".","..",NULL ) ){
e = zuluCryptRealPath( StringAppendAt( st,8,f ) ) ;
if( StringsAreEqual( path,e ) ){
StringFree( e ) ;
return zuluExit( dir,st ) ;
}else{
StringFree( e ) ;
}
}
}
}
StringReplace( st,path ) ;
return zuluExit( dir,st ) ;
}
static int open_plain_as_me_1(const struct_opts * opts,const char * mapping_name,uid_t uid,int op )
{
/*
* Below is a form of memory management.All strings are collected in a stringlist object to easily delete them
* when the function returns.This allows for the function to have multiple exit points without risks of leaking
* memory from manually examining each exit point to make sure all strings are deleted or go with multiple goto
* code deleting blocks to take into account different exit points.
*/
stringList_t stl ;
string_t * stringArray = StringListArray( &stl,5 ) ;
string_t * mapper = &stringArray[ 0 ] ;
string_t * passphrase = &stringArray[ 1 ] ;
string_t * p = &stringArray[ 2 ] ;
string_t * dev_st = &stringArray[ 3 ] ;
string_t * dev_1 = &stringArray[ 4 ] ;
size_t len = 0 ;
const char * source = opts->key_source ;
const char * pass = opts->key ;
int k = opts->ask_confirmation ;
const char * cpass = NULL ;
char * d ;
const char * device = opts->device ;
const char * dev = opts->device ;
int j ;
int n ;
const char * cmapper ;
if( StringPrefixEqual( device,"/dev/loop" ) ){
/*
* zuluCryptLoopDeviceAddress() is defined in ../lib/create_loop_device.c
*/
d = zuluCryptLoopDeviceAddress( device ) ;
*dev_st = StringInherit( &d ) ;
dev = StringContent( *dev_st ) ;
*dev_1 = StringCopy( *dev_st ) ;
device = StringReplaceString( * dev_1,"\\040"," " ) ;
}
/*
* zuluCryptPartitionIsSystemPartition() is defined in ./partition.c
*/
if( zuluCryptPartitionIsSystemPartition( device,uid ) ){
if( uid != 0 ){
return zuluExit( stl,8 ) ;
}
}
/*
* ZULUCRYPTlongMapperPath and ZULUCRYPTshortMapperPath are in ../constants.h
* zuluCryptCreateMapperName() is defined at ../lib/create_mapper_name.c
*/
*mapper = zuluCryptCreateMapperName( device,mapping_name,uid,ZULUCRYPTshortMapperPath ) ;
*p = zuluCryptCreateMapperName( device,mapping_name,uid,ZULUCRYPTlongMapperPath ) ;
j = zuluCryptCheckOpenedMapper( StringContent( *p ) ) ;
/*
* zuluCryptPartitionIsMounted() is defined in ../lib/process_mountinfo.c
*/
n = zuluCryptPartitionIsMounted( dev ) ;
if( j == 1 ){
return zuluExit( stl,13 ) ;
}
if( n == 1 ){
return zuluExit( stl,14 ) ;
}
if( k == 0 ){
*passphrase = StringRandomString( 64 ) ;
cpass = StringContent( *passphrase ) ;
len = StringLength( *passphrase ) ;
}else if( source == NULL ){
printf( gettext( "Enter passphrase: " ) ) ;
/*
* ZULUCRYPT_KEY_MAX_SIZE is set in ../constants.h
*/
switch( StringSilentlyGetFromTerminal_1( passphrase,ZULUCRYPT_KEY_MAX_SIZE ) ){
case 1 : return zuluExit( stl,16 ) ;
case 2 : return zuluExit( stl,17 ) ;
}
printf( "\n" ) ;
cpass = StringContent( *passphrase ) ;
len = StringLength( *passphrase ) ;
}else{
if( strcmp( source,"-p" ) == 0 ){
*passphrase = String( pass ) ;
cpass = StringContent( *passphrase ) ;
len = StringLength( *passphrase ) ;
}else if( strcmp( source,"-f" ) == 0 ){
/*
* zuluCryptGetPassFromFile() is defined at "path_access.c"
*/
switch( zuluCryptGetPassFromFile( pass,uid,passphrase ) ){
case 1 : return zuluExit( stl,10 ) ;
case 2 : return zuluExit( stl,11 ) ;
case 4 : return zuluExit( stl,12 ) ;
}
cpass = StringContent( *passphrase ) ;
len = StringLength( *passphrase ) ;
}
}
if( zuluCryptSecurityGainElevatedPrivileges() ){
/*
* zuluCryptOpenPlain() is defined in ../lib/open_plain.c
*/
if( zuluCryptOpenPlain( device,StringContent( *mapper ),"rw",cpass,len ) != 0 ){
zuluCryptSecurityDropElevatedPrivileges() ;
return zuluExit( stl,1 ) ;
}
}
zuluCryptSecurityDropElevatedPrivileges() ;
/*
* Create a mapper path(usually at /dev/mapper) associated with opened plain mapper above.
*/
cmapper = StringMultiplePrepend( *mapper,"/",crypt_get_dir(),NULL ) ;
/*
* mapper path is usually a soft link to /dev/dm-X
* resolve the mapper path to its respective /dev/dm-X and set permission on it.
*
* We set permission of /dev/dm-X pointing to the device to "u+rw" because we want notmal user to be able
* to write to the device through the mapper.
*
* Useful when a normal user want to delete content of the device by writing random data to it.
*/
d = zuluCryptRealPath( cmapper ) ;
if( zuluCryptSecurityGainElevatedPrivileges() ){
if( d != NULL ){
_ignore_result( chown( d,uid,0 ) ) ;
_ignore_result( chmod( d,S_IRWXU ) ) ;
StringFree( d ) ;
}
zuluCryptSecurityDropElevatedPrivileges() ;
}else{
return zuluExit( stl,1 ) ;
}
if( op == 1 ){
return zuluExit( stl,0 ) ;
}else{
StringListClearDelete( &stl ) ;
return 0 ;
}
}
