czar

clean-room implementation of a XAR unarchiver

status

• Header
  • Magic
  • Header size
  • Version
  • TOC length (compressed)
  • TOC length (uncompressed)
  • Checksum algorithm
    • None
    • SHA1
    • MD5
• TOC
  • Extraction
  • Parsing
  • Checksum validation
• Heap
  • Extraction
    • gzip/zlib
    • bzip2
  • Checksum validation
• File Metadata

current features

• archive info
• file listing
• checksum validation
• decompression

usage

Usage: czar [options] <xar_file>
Options:
  --strict      Fail extraction if any checksum validation fails
  --no-extract  Only validate checksums, don't extract files
  --help, -h    Show this help message

Files are extracted to ./<xar_file>.extracted/

examples

# Extract archive with checksum validation
./czar archive.xar

# Validate checksums only (no extraction)
./czar --no-extract archive.xar

# Strict mode - fail if any checksum is invalid
./czar --strict archive.xar

This project, initially authored by Mara Robin Broda in 2018, is licensed under the GNU Lesser General Public License v3.0