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test: Fix bugs involving AES encryption

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This commit is contained in:
Chris Hennick 2024-06-14 11:45:37 -07:00
parent c0fd504771
commit 499bd65f71
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GPG key ID: DA47AABA4961C509
2 changed files with 13 additions and 6 deletions
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8
src/read.rs
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@ -1215,8 +1215,10 @@ pub(crate) fn parse_extra_field(file: &mut ZipFileData) -> ZipResult<()> {
let mut reader = io::Cursor::new(extra_field);
/* TODO: codify this structure into Zip64ExtraFieldBlock fields! */
while (reader.position() as usize) < len {
parse_single_extra_field(file, &mut reader)?;
let mut position = reader.position();
while (position as usize) < len {
parse_single_extra_field(file, &mut reader, position)?;
position = reader.position();
}
Ok(())
}
@ -1224,6 +1226,7 @@ pub(crate) fn parse_extra_field(file: &mut ZipFileData) -> ZipResult<()> {
pub(crate) fn parse_single_extra_field<R: Read>(
file: &mut ZipFileData,
reader: &mut R,
bytes_already_read: u64,
) -> ZipResult<()> {
let kind = reader.read_u16_le()?;
let len = reader.read_u16_le()?;
@ -1271,6 +1274,7 @@ pub(crate) fn parse_single_extra_field<R: Read>(
_ => return Err(ZipError::InvalidArchive("Invalid AES encryption strength")),
};
file.compression_method = compression_method;
file.aes_extra_data_start = bytes_already_read;
}
0x5455 => {
// extended timestamp

11
src/write.rs
View file

@ -4,8 +4,7 @@
use crate::aes::AesWriter;
use crate::compression::CompressionMethod;
use crate::read::{
find_content, parse_extra_field, parse_single_extra_field, Config, ZipArchive, ZipFile,
ZipFileReader,
find_content, parse_single_extra_field, Config, ZipArchive, ZipFile, ZipFileReader,
};
use crate::result::{ZipError, ZipResult};
use crate::spec::{self, FixedSizeBlock, Magic};
@ -351,7 +350,7 @@ impl ExtendedFileOptions {
}
data.seek(SeekFrom::Current(-2))?;
}
parse_single_extra_field(&mut ZipFileData::default(), &mut data)?;
parse_single_extra_field(&mut ZipFileData::default(), &mut data, 0)?;
}
Ok(())
}
@ -874,6 +873,7 @@ impl<W: Write + Seek> ZipWriter<W> {
if let Some(EncryptWith::Aes { mode, .. }) = options.encrypt_with {
let aes_dummy_extra_data =
vec![0x02, 0x00, 0x41, 0x45, mode as u8, 0x00, 0x00].into_boxed_slice();
aes_extra_data_start = extensions.extra_data.len() as u64;
extensions.add_extra_data(0x9901, aes_dummy_extra_data, false)?;
}
{
@ -898,7 +898,6 @@ impl<W: Write + Seek> ZipWriter<W> {
aes_mode,
&extensions.extra_data,
);
parse_extra_field(&mut file)?;
file.version_made_by = file.version_made_by.max(file.version_needed() as u8);
let index = self.insert_file_data(file)?;
let file = &mut self.files[index];
@ -943,6 +942,10 @@ impl<W: Write + Seek> ZipWriter<W> {
extensions.add_extra_data(0xa11e, pad_body.into_boxed_slice(), false)?;
}
}
extensions.validate_extra_data()?;
if extensions.central_extra_data.len() > 0 {
file.central_extra_field = Some(extensions.central_extra_data);
}
writer.write_all(&extensions.extra_data)?;
extra_data_end = writer.stream_position()?;
debug_assert_eq!(extra_data_end % (options.alignment.max(1) as u64), 0);