51febea6c3
Two new functions: md5.new(): returns a new MD5 state object with two methods: - MD5State:update(s) - adds the string s to the calculation - MD5State:finish() - returns the final MD5 as a binary string md5.tohex(): converts to hexadecimal the binary string returned by md5.sum() and MD5State:finish()
md5.lua 
This pure-Lua module computes md5 in Lua 5.1, Lua 5.2 and LuaJIT, using native bit-manipulation libraries when available, and falling back to table-based manipulation of integers in 5.1.
It implements md5.sum and md5.sumhex like the kernel project md5 package, but it's done completely in Lua, with no dependencies on other libs or C files.
Usage
local md5 = require 'md5'
local md5_as_hex = md5.sumhexa(message) -- returns a hex string
local md5_as_data = md5.sum(message) -- returns raw bytes
Credits
This is a cleanup of an implementation by Adam Baldwin - https://gist.github.com/evilpacket/3647908
Which in turn was a mix of the bitwise lib, http://luaforge.net/projects/bit/ by hanzhao (abrash_han - at - hotmail.com),
and http://equi4.com/md5/md5calc.lua, by Equi 4 Software.
Lua 5.2 and LuaJIT compatibility by Positive07
License
This library, as well as all the previous ones in which is based, is released under the MIT license (See license file for details).
Specs
The specs for this library are implemented with busted. In order to run them, install busted and then:
cd path/to/where/the/spec/folder/is
busted