zip/extra_fields/
ntfs.rs

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1use std::io::Read;
2
3use crate::{
4    result::{ZipError, ZipResult},
5    unstable::LittleEndianReadExt,
6};
7
8/// The NTFS extra field as described in [PKWARE's APPNOTE.TXT v6.3.9].
9///
10/// This field stores [Windows file times], which are 64-bit unsigned integer
11/// values that represents the number of 100-nanosecond intervals that have
12/// elapsed since "1601-01-01 00:00:00 UTC".
13///
14/// [PKWARE's APPNOTE.TXT v6.3.9]: https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT
15/// [Windows file times]: https://docs.microsoft.com/en-us/windows/win32/sysinfo/file-times
16#[derive(Clone, Debug)]
17pub struct Ntfs {
18    mtime: u64,
19    atime: u64,
20    ctime: u64,
21}
22
23impl Ntfs {
24    /// Creates a NTFS extra field struct by reading the required bytes from the
25    /// reader.
26    ///
27    /// This method assumes that the length has already been read, therefore it
28    /// must be passed as an argument.
29    pub fn try_from_reader<R>(reader: &mut R, len: u16) -> ZipResult<Self>
30    where
31        R: Read,
32    {
33        if len != 32 {
34            return Err(ZipError::UnsupportedArchive(
35                "NTFS extra field has an unsupported length",
36            ));
37        }
38
39        // Read reserved for future use.
40        let _ = reader.read_u32_le()?;
41
42        let tag = reader.read_u16_le()?;
43        if tag != 0x0001 {
44            return Err(ZipError::UnsupportedArchive(
45                "NTFS extra field has an unsupported attribute tag",
46            ));
47        }
48        let size = reader.read_u16_le()?;
49        if size != 24 {
50            return Err(ZipError::UnsupportedArchive(
51                "NTFS extra field has an unsupported attribute size",
52            ));
53        }
54
55        let mtime = reader.read_u64_le()?;
56        let atime = reader.read_u64_le()?;
57        let ctime = reader.read_u64_le()?;
58        Ok(Self {
59            mtime,
60            atime,
61            ctime,
62        })
63    }
64
65    /// Returns the file last modification time as a file time.
66    pub fn mtime(&self) -> u64 {
67        self.mtime
68    }
69
70    /// Returns the file last modification time as a file time.
71    #[cfg(feature = "nt-time")]
72    pub fn modified_file_time(&self) -> nt_time::FileTime {
73        nt_time::FileTime::new(self.mtime)
74    }
75
76    /// Returns the file last access time as a file time.
77    pub fn atime(&self) -> u64 {
78        self.atime
79    }
80
81    /// Returns the file last access time as a file time.
82    #[cfg(feature = "nt-time")]
83    pub fn accessed_file_time(&self) -> nt_time::FileTime {
84        nt_time::FileTime::new(self.atime)
85    }
86
87    /// Returns the file creation time as a file time.
88    pub fn ctime(&self) -> u64 {
89        self.ctime
90    }
91
92    /// Returns the file creation time as a file time.
93    #[cfg(feature = "nt-time")]
94    pub fn created_file_time(&self) -> nt_time::FileTime {
95        nt_time::FileTime::new(self.ctime)
96    }
97}
zip/extra_fields/ntfs.rs

zip/extra_fields/
ntfs.rs
