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use crate::attribute::FileAttributeFlags;
use crate::err::{self, Result};
use crate::ReadSeek;
use log::trace;
use snafu::OptionExt;
use byteorder::{LittleEndian, ReadBytesExt};
use encoding::all::UTF_16LE;
use encoding::{DecoderTrap, Encoding};
use chrono::{DateTime, Utc};
use num_traits::FromPrimitive;
use serde::Serialize;
use snafu::ResultExt;
use winstructs::ntfs::mft_reference::MftReference;
use winstructs::timestamp::WinTimestamp;
#[derive(FromPrimitive, Serialize, Clone, Debug, PartialOrd, PartialEq)]
#[repr(u8)]
pub enum FileNamespace {
POSIX = 0,
Win32 = 1,
DOS = 2,
Win32AndDos = 3,
}
#[derive(Serialize, Clone, Debug)]
pub struct FileNameAttr {
pub parent: MftReference,
pub created: DateTime<Utc>,
pub modified: DateTime<Utc>,
pub mft_modified: DateTime<Utc>,
pub accessed: DateTime<Utc>,
pub logical_size: u64,
pub physical_size: u64,
pub flags: FileAttributeFlags,
pub reparse_value: u32,
pub name_length: u8,
pub namespace: FileNamespace,
pub name: String,
}
impl FileNameAttr {
/// Parse a Filename attrbiute buffer.
///
/// # Example
///
/// Parse a raw buffer.
///
/// ```
/// use mft::attribute::x30::{FileNameAttr, FileNamespace};
/// # use std::io::Cursor;
/// let attribute_buffer: &[u8] = &[
/// 0x05,0x00,0x00,0x00,0x00,0x00,0x05,0x00,0xD5,0x2D,0x48,0x58,0x43,0x5F,0xCE,0x01,
/// 0xD5,0x2D,0x48,0x58,0x43,0x5F,0xCE,0x01,0xD5,0x2D,0x48,0x58,0x43,0x5F,0xCE,0x01,
/// 0xD5,0x2D,0x48,0x58,0x43,0x5F,0xCE,0x01,0x00,0x00,0x00,0x04,0x00,0x00,0x00,0x00,
/// 0x00,0x00,0x00,0x04,0x00,0x00,0x00,0x00,0x06,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
/// 0x08,0x03,0x24,0x00,0x4C,0x00,0x6F,0x00,0x67,0x00,0x46,0x00,0x69,0x00,0x6C,0x00,
/// 0x65,0x00,0x00,0x00,0x00,0x00,0x00,0x00
/// ];
///
/// let attribute = FileNameAttr::from_stream(&mut Cursor::new(attribute_buffer)).unwrap();
///
/// assert_eq!(attribute.parent.entry, 5);
/// assert_eq!(attribute.created.timestamp(), 1370144608);
/// assert_eq!(attribute.modified.timestamp(), 1370144608);
/// assert_eq!(attribute.mft_modified.timestamp(), 1370144608);
/// assert_eq!(attribute.accessed.timestamp(), 1370144608);
/// assert_eq!(attribute.logical_size, 67108864);
/// assert_eq!(attribute.physical_size, 67108864);
/// assert_eq!(attribute.flags.bits(), 6);
/// assert_eq!(attribute.reparse_value, 0);
/// assert_eq!(attribute.name_length, 8);
/// assert_eq!(attribute.namespace, FileNamespace::Win32AndDos);
/// assert_eq!(attribute.name, "$LogFile");
/// ```
pub fn from_stream<S: ReadSeek>(stream: &mut S) -> Result<FileNameAttr> {
trace!("Offset {}: FilenameAttr", stream.tell()?);
let parent = MftReference::from_reader(stream).context(err::FailedToReadMftReference)?;
let created = WinTimestamp::from_reader(stream)
.context(err::FailedToReadWindowsTime)?
.to_datetime();
let modified = WinTimestamp::from_reader(stream)
.context(err::FailedToReadWindowsTime)?
.to_datetime();
let mft_modified = WinTimestamp::from_reader(stream)
.context(err::FailedToReadWindowsTime)?
.to_datetime();
let accessed = WinTimestamp::from_reader(stream)
.context(err::FailedToReadWindowsTime)?
.to_datetime();
let logical_size = stream.read_u64::<LittleEndian>()?;
let physical_size = stream.read_u64::<LittleEndian>()?;
let flags = FileAttributeFlags::from_bits_truncate(stream.read_u32::<LittleEndian>()?);
let reparse_value = stream.read_u32::<LittleEndian>()?;
let name_length = stream.read_u8()?;
let namespace = stream.read_u8()?;
let namespace =
FileNamespace::from_u8(namespace).context(err::UnknownNamespace { namespace })?;
let mut name_buffer = vec![0; (name_length as usize * 2) as usize];
stream.read_exact(&mut name_buffer)?;
let name = match UTF_16LE.decode(&name_buffer, DecoderTrap::Ignore) {
Ok(s) => s,
Err(_e) => return err::InvalidFilename {}.fail(),
};
Ok(FileNameAttr {
parent,
created,
modified,
mft_modified,
accessed,
logical_size,
physical_size,
flags,
reparse_value,
name_length,
namespace,
name,
})
}
}
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