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java-fast-md5

This is a fork of Timothy W. Macinta's FastMD5 project by Joyent for distribution through Maven Central.

We've left the package name unmodified in order to spare users from having to download or build new versions of the native library.

Usage

Add a Maven dependency:

<dependency>
    <groupId>com.joyent.util</groupId>
    <artifactId>fast-md5</artifactId>
    <version>2.7.1</version>
</dependency>

Please note: classes are defined under the com.twmacinta.util package despite the differing group ID. This is required to maintain binary compatibility with native library files distributed at the original project page.

Native library

Set the com.twmacinta.util.MD5.NATIVE_LIB_FILE system property to the absolute path of your architecture's compiled library file (.jnilib or .so).

Explicitly disable native library

Set the com.twmacinta.util.MD5.NO_NATIVE_LIB system property to 1 or true to prevent loading of native library files. This takes precedence over NATIVE_LIB_FILE.

Native library autodiscovery

When neither the NATIVE_LIB_FILE nor NO_NATIVE_LIB properties are set the following paths will be checked automatically:

  • ${CWD}/lib/arch/${OS}_${ARCH}/MD5.${EXT}
  • ${CWD}/lib/MD5.${EXT}
  • ${CWD}/MD5.${EXT}

Where ${EXT} is based on ${OS} using the following table:

OS EXT
darwin jnilib
freebsd so
linux so
windows dll
default so

Original project notes follow.

This is a fast implementation of the MD5 algorithm written in Java. For details, see the project website at:

http://www.twmacinta.com/myjava/fast_md5.php