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minizip 2.7.5

minizip is a zip manipulation library written in C that is supported on Windows, macOS, and Linux.

Maintained by Nathan Moinvaziri.

Branches

Name	State	Version	Description
master	Active	2.x	Modern rewrite of 1.2 branch that includes more advanced features, improvements in code maintainability and readability, and the reduction of duplicate code. Compatibility layer provided for older versions.
dev	Active	2.x	Latest development code
1.2	Stale	1.x	Drop-in replacement for zlib's minizip that includes WinZip AES encryption, disk splitting, I/O buffering and some additional fixes.
1.1	Stale	1.x	Original minizip as of zlib 1.2.11.

History

Minizip was originally developed by Gilles Vollant and had been contributed to by many people. As part of the zlib distribution, Mark Adler still maintains the original minizip project which is included in this repository as a reference.

My work with the minizip library began in 2006 when I started submitting bugs I found to Gilles Vollant. In 2010, I implemented some additional features like WinZip AES encryption, disk splitting, and I/O buffering that were necessary for another project I was working on. Shortly after, I created this public repository so I could share these and other improvements with the rest of the world. I have been maintaining and actively developing this code base ever since. At the beginning of 2017, I began the work to refactor and rewrite the library as version 2 because it had become difficult to maintain and code readability suffered over the years.

Features

• Creating and extracting zip archives.
• Adding and removing entries from zip archives.
• Read and write raw zip entry data.
• Reading and writing zip archives from memory.
• Zlib, BZIP2, and LZMA compression methods.
• Password protection through Traditional PKWARE and WinZIP AES encryption.
• Buffered streaming for improved I/O performance.
• NTFS timestamp support for UTC last modified, last accessed, and creation dates.
• Disk split support for splitting zip archives into multiple files.
• Preservation of file attributes across file systems.
• Unicode filename support through UTF-8 encoding.
• Legacy character encoding support CP437, CP932, CP936, CP950.
• Turn off compilation of compression, decompression, or encryption.
• Windows (Win32 & WinRT), macOS and Linux platform support.
• Streaming interface for easy implementation of additional platforms.
• Support for Apple's compression library ZLIB implementation.
• Zero out local file header information.
• Zip/unzip of central directory to reduce size.
• Ability to generate and verify CMS signature for each entry.
• Recover the central directory if it is corrupt or missing.
• Example minizip command line tool.

Build

To generate project files for your platform:

1. Download and install cmake.
2. Run cmake in the minizip directory.

cmake . -DBUILD_TEST=ON
cmake --build .

Build Options

Name	Description	Default Value
USE_COMPAT	Enables compatibility layer	ON
USE_ZLIB	Enables ZLIB compression	ON
USE_BZIP2	Enables BZIP2 compression	ON
USE_LZMA	Enables LZMA compression	ON
USE_PKCRYPT	Enables PKWARE traditional encryption	ON
USE_AES	Enables WinZIP AES encryption	ON
USE_LIBCOMP	Enables Apple compression	OFF
USE_OPENSSL	Enables OpenSSL encryption	OFF
USE_BRG	Enables Brian Gladman's library	OFF
COMPRESS_ONLY	Only support compression	OFF
DECOMPRESS_ONLY	Only support decompression	OFF
BUILD_TEST	Builds minizip test executable	OFF
BUILD_UNIT_TEST	Builds minizip unit test project	OFF
BUILD_FUZZ_TEST	Builds minizip fuzz executables	OFF

Contents

File(s)	Description
minizip.c	Sample application
mz_compat.*	Minizip 1.x compatibility layer
mz.h	Error codes and flags
mz_os*	Platform specific file/utility functions
mz_crypt*	Configuration specific crypto/hashing functions
mz_strm.*	Stream interface
mz_strm_buf.*	Buffered stream
mz_strm_bzip.*	BZIP2 stream using libbzip2
mz_strm_libcomp.*	Apple compression stream
mz_strm_lzma.*	LZMA stream using liblzma
mz_strm_mem.*	Memory stream
mz_strm_split.*	Disk splitting stream
mz_strm_pkcrypt.*	PKWARE traditional encryption stream
mz_strm_os*	Platform specific file stream
mz_strm_wzaes.*	WinZIP AES stream
mz_strm_zlib.*	Deflate stream using zlib
mz_zip.*	Zip format
mz_zip_rw.*	Zip reader/writer

Third-Party Libraries

• zlib written by Mark Adler and Jean-loup Gailly.
  • Not included in this repository
  • Or alternatively, zlib-ng by Hans Kristian Rosbach
• BZIP2 written by Julian Seward.
• liblzma written by Lasse Collin.
  • Modifications were made to support the ZIP file format specification
• AES and SHA libraries of Brian Gladman.

Acknowledgments

Thanks to Gilles Vollant on which this work is originally based on.

Thanks go out to all the people who have taken the time to contribute code reviews, testing and/or patches. This project would not have been nearly as good without you.

The ZIP format was defined by Phil Katz of PKWARE.