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|
use seek_bufread::BufReader;
use enumerator::{PathEnumerator,PathMapping};
use rwinstructs::reference::{MftReference};
use errors::{MftError};
use entry::{MftEntry};
use std::fs::File;
use std::io::Read;
use std::io::Seek;
use std::io::SeekFrom;
use std::mem;
pub struct MftHandler {
filehandle: BufReader<File>,
path_enumerator: PathEnumerator,
_entry_size: u32,
_offset: u64,
_size: u64
}
impl MftHandler{
pub fn new(filename: &str) -> Result<MftHandler,MftError> {
let mut mft_handler: MftHandler = unsafe {
mem::zeroed()
};
let mut mft_fh = match File::open(filename) {
Ok(usn_fh) => usn_fh,
// Handle error here
Err(error) => panic!("Error: {}",error)
};
// get file size
mft_handler._size = match mft_fh.seek(SeekFrom::End(0)){
Err(e) => panic!("Error: {}",e),
Ok(size) => size
};
mft_handler.filehandle = BufReader::with_capacity(
4096,
mft_fh
);
mft_handler.set_entry_size(1024);
Ok(mft_handler)
}
pub fn set_entry_size(&mut self, entry_size: u32){
self._entry_size = entry_size
}
pub fn get_entry_count(&self)->u64 {
self._size / self._entry_size as u64
}
pub fn entry(&mut self, entry: u64) -> Result<MftEntry,MftError> {
self.filehandle.seek(
SeekFrom::Start(entry * self._entry_size as u64)
).unwrap();
let mut entry_buffer = vec![0; self._entry_size as usize];
self.filehandle.read_exact(
&mut entry_buffer
)?;
let mut mft_entry = self.entry_from_buffer(
entry_buffer,
entry
)?;
// We need to set the path if dir
match mft_entry.get_pathmap() {
Some(mapping) => {
if mft_entry.is_dir() {
&self.path_enumerator.set_mapping(
mft_entry.header.entry_reference.clone().unwrap(),
mapping.clone()
);
}
},
None => {},
}
mft_entry.set_fullnames(
self
);
Ok(mft_entry)
}
pub fn print_mapping(&self){
self.path_enumerator.print_mapping();
}
pub fn entry_from_buffer(&mut self, buffer: Vec<u8>, entry: u64) -> Result<MftEntry,MftError> {
let mft_entry = MftEntry::new(
buffer,
Some(entry)
)?;
Ok(mft_entry)
}
pub fn get_fullpath(&mut self, reference: MftReference) -> String {
let mut path_stack = Vec::new();
self.enumerate_path_stack(
&mut path_stack,
reference
);
path_stack.join("/")
}
fn enumerate_path_stack(&mut self, name_stack: &mut Vec<String>, reference: MftReference) {
// 1407374883553285 (5-5)
if reference.0 == 1407374883553285 {
}
else {
match self.path_enumerator.get_mapping(reference){
Some(mapping) => {
self.enumerate_path_stack(
name_stack,
mapping.parent.clone()
);
name_stack.push(
mapping.name.clone()
);
},
None => {
// Mapping not exists
// Get entry number for this reference that does not exist
let entry = reference.get_entry_number();
// Gat mapping for it
match self.get_mapping_from_entry(entry) {
Some(mapping) => {
self.path_enumerator.set_mapping(
reference,
mapping.clone()
);
self.enumerate_path_stack(
name_stack,
reference
);
},
None => {}
}
}
}
}
}
fn get_mapping_from_entry(&mut self, entry: u64) -> Option<PathMapping>{
self.filehandle.seek(
SeekFrom::Start(entry * self._entry_size as u64)
);
let mut entry_buffer = vec![0; self._entry_size as usize];
self.filehandle.read_exact(
&mut entry_buffer
);
let mut mft_entry = self.entry_from_buffer(
entry_buffer,
entry
);
mft_entry.unwrap().get_pathmap()
}
}
|
