This module implements a fast and memory efficient (in place) SHA familly hash function in pure javascript.

SHA function are cryptographic hashs function designed by the United States National Security Agency and is a U.S. Federal Information Processing Standard published by the United States NIST. SHA-1 produces a 160-bit (20-byte) hash value known as a message digest.

This module implements: sha, sha1, sha256, sha512.

Node.js is an event-based server-side JavaScript engine.