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kikito/md5.lua: MD5 sum in pure Lua, with no C and no external dependencies

原作者: [db:作者] 来自: 网络 收藏 邀请

开源软件名称(OpenSource Name):

kikito/md5.lua

开源软件地址(OpenSource Url):

https://github.com/kikito/md5.lua

开源编程语言(OpenSource Language):

Lua 100.0%

开源软件介绍(OpenSource Introduction):

md5.lua Build Status

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 kepler project md5 package, but it's done completely in Lua, with no dependencies on other libs or C files.

Usage

Simple example:

local md5 = require 'md5'

local md5_as_data  = md5.sum(message)       -- returns raw bytes
local md5_as_hex   = md5.sumhexa(message)   -- returns a hex string
local md5_as_hex2  = md5.tohex(md5_as_data) -- returns the same string as md5_as_hex

Incremental example (for computing md5 of streams, or big files which have to be loaded in chunks - new since 1.1.0):

local m = md5.new()
m:update('some bytes')
m:update('some more bytes')
m:update('etc')
return md5.tohex(m:finish())

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

A very important fix and the incremental variant by pgimeno

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

Install

Either copy the file or using luarocks:

luarocks install --server=http://luarocks.org/manifests/kikito md5



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