developerWorks: Secure Java Apps on Linux Using MD5 Crypt

"If you are a security developer and need to interface a Java application with the local operating system user registry, what do you do? This article gives you the answer: UNIX/Linux PAM (Pluggable Authentication Module)-compatible systems that use authentication based on the GNU MD5 extensions to the crypt() system call. I'll describe these extensions and show you a Java implementation of MD5 crypt (using FreeBSD as my UNIX).

"MD5 (message-digest algorithm 5; RFC 1321) is a widely used cryptographic hash function with a 128-bit hash value..."

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