Add password-protected archives and CLI tools#394
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Implement Traditional PKWARE Encryption (APPNOTE 6.1) for reading and
writing password-protected zip archives. The feature is fully backward
compatible -- existing APIs and non-password usage are unchanged.
New public API:
- zip_open_with_password / zip_open_with_password_and_error
- zip_stream_open_with_password
- ZIP_EPASSWD error code
Encryption details:
- PKWARE cipher key derivation with raw (uncomplemented) CRC32
- On-the-fly encryption via tdefl callback for compressed entries
- Re-encryption at entry close to patch the CRC-based check byte,
ensuring interoperability with Info-ZIP unzip and Python zipfile
- Supports both compressed (deflate) and stored (level 0) entries
Add standalone CLI tools (gated behind -DZIP_BUILD_TOOLS=ON):
- zipcli -- create archives, with optional -p password
- unzipcli -- list/extract archives, with optional -p password
Add comprehensive test suite (test/test_password.c, 17 tests) covering
write/read round-trips, wrong passwords, stream API, entry deletion,
large data, and multiple writes per entry.
Update README.md with password-protected archive examples.
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Implement Traditional PKWARE Encryption (APPNOTE 6.1) for reading and writing password-protected zip archives. The feature is fully backward compatible -- existing APIs and non-password usage are unchanged.
New public API:
Encryption details:
Add standalone CLI tools (gated behind -DZIP_BUILD_TOOLS=ON):
Add comprehensive test suite (test/test_password.c, 17 tests) covering write/read round-trips, wrong passwords, stream API, entry deletion, large data, and multiple writes per entry.
Update README.md with password-protected archive examples.
Closes https://github.com/kuba--/zip/issues/358