these-android-re/androscalpel
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insert file in zip

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This commit is contained in:
Jean-Marie Mineau 2024-01-19 16:41:59 +01:00
parent 3f521b5754
commit 7b6a5980c8
Signed by: histausse
GPG key ID: B66AEEDA9B645AD2
6 changed files with 210 additions and 8 deletions
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15
apk_frauder/src/zip_writer.rs
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@ -166,13 +166,12 @@ impl<T: Write> ZipFileWriter<T> {
CompressionMethod::Deflated => {
// TODO: find a way to do this in place, the compressed data can be large, and storing it
// in memory is bad, but Deflate consume the Reader, so we cannot juste give it self.data
// TODO: Compression::default -> nop, use flags
// TODO: Compression::default -> use flag?
let mut compressor =
DeflateEncoder::new(CrcWriter::new(Vec::new()), Compression::default());
CrcWriter::new(DeflateEncoder::new(Vec::new(), Compression::default()));
io::copy(file, &mut compressor).unwrap();
let finished = compressor.finish().unwrap();
local_header.crc_32 = finished.crc().sum();
finished.into_inner()
local_header.crc_32 = compressor.crc().sum();
compressor.into_inner().finish().unwrap()
}
_ => unimplemented!(),
};
@ -187,6 +186,12 @@ impl<T: Write> ZipFileWriter<T> {
header.set_uncompressed_size(local_header.get_uncompressed_size());
header.set_offset_local_header(header_offset);
// TODO: compression flags are not used right now, set to zero
local_header.general_purpose_flags &= !(general_purpose_flags::MASK_COMPRESS_OPTION_1
| general_purpose_flags::MASK_COMPRESS_OPTION_2);
header.general_purpose_flags &= !(general_purpose_flags::MASK_COMPRESS_OPTION_1
| general_purpose_flags::MASK_COMPRESS_OPTION_2);
let file_info = FileInfo {
local_header,
header,