Cryptographic Library for Lua


MD5 offers basic cryptographic facilities for Lua 5.0, 5.1 or 5.2: a hash (digest) function, a pair crypt/decrypt based on MD5 and CFB, and a pair crypt/decrypt based on DES with 56-bit keys.

MD5 is free software and uses the same license as Lua (MIT).


MD5 version 1.2 is now available for download.


MD5 can be downloaded in source code from its GitHub page.

You can also install MD5 using LuaRocks:

luarocks install md5


Version 1.2 [06/Sep/2013]
  • Code adapted to compile for Lua 5.0, 5.1 and 5.2
Version 1.1.2 [12/May/2008]
  • Fixed bug in 64-bit systems
  • Fixed the Windows makefile to accept longer directory names (patch by Alessandro Hecht and Ignacio Burgueño).
Version 1.1.1 [28/Nov/2007]
  • Added DES56 tests (by Mauricio Bomfim)
  • Updated DES56 source to the latest release from Stuart Levy
Version 1.1.0 [30/Oct/2007]
Added DES56 crypt/decrypt functions.
Version 1.0.2 [08/May/2007]
  • Added a nmake version for Lua 5.1
  • Windows binaries for Lua 5.1.2
Version 1.0.1 [21/Aug/2006]
  • Adapted to work with both Lua 5.0 and Lua 5.1
  • Windows binaries for Lua 5.0.3
Version 1.0.0
  • First public version


This Lua version of MD5 was designed and implemented by Roberto Ierusalimschy and Marcela Ozório Suarez (based on the original MD5 by Ron Rivest). The DES 56 C library was implemented by Stuart Levy and uses a MIT license too. The current distribution was packed by Tomás Guisasola and Fábio Mascarenhas as part of the Kepler Project.

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