From b7be0d0902b092ff1b7e57e7fc819150e85cfd16 Mon Sep 17 00:00:00 2001
From: ubq323 <ubq323@ubq323.website>
Date: Thu, 4 Aug 2022 01:07:39 +0100
Subject: chat

---
 md5.lua | 167 ----------------------------------------------------------------
 1 file changed, 167 deletions(-)
 delete mode 100644 md5.lua

(limited to 'md5.lua')

diff --git a/md5.lua b/md5.lua
deleted file mode 100644
index b421587..0000000
--- a/md5.lua
+++ /dev/null
@@ -1,167 +0,0 @@
--- from https://github.com/philanc/plc/blob/master/plc/md5.lua
-------------------------------------------------------------------------
--- md5 hash - see RFC 1321 - https://www.ietf.org/rfc/rfc1321.txt
-
-local spack, sunpack = string.pack, string.unpack
-
-------------------------------------------------------------------------
-
-local function FF(a, b, c, d, x, s, ac)
-	a = (a + ((b & c) | ((~b) & d)) + x + ac) & 0xffffffff
-	a = ((a << s) | (a >> (32-s))) & 0xffffffff
-	a = (a + b) & 0xffffffff
-	return a
-end
-
-local function GG(a, b, c, d, x, s, ac)
-	a = (a + ((b & d) | c & (~d) ) + x + ac) & 0xffffffff
-	a = ((a << s) | (a >> (32-s))) & 0xffffffff
-	a = (a + b) & 0xffffffff
-	return a
-end
-
-local function HH(a, b, c, d, x, s, ac)
-	a = (a + ((b ~ c ~ d)) + x + ac) & 0xffffffff
-	a = ((a << s) | (a >> (32-s))) & 0xffffffff
-	a = (a + b) & 0xffffffff
-	return a
-end
-
-local function II(a, b, c, d, x, s, ac)
-	a = (a + (c ~ (b | ~d)) + x + ac) & 0xffffffff
-	a = ((a << s) | (a >> (32-s))) & 0xffffffff
-	a = (a + b) & 0xffffffff
-	return a
-end
-
-local function transform(state, input, i, t)
-	-- process the 64-byte input block in string 'input' at offset 'i'
-	-- t is a uint32[16] array. It is passed as a parameter
-	-- for performance reasons
-	--
-	local a, b, c, d = state[1], state[2], state[3], state[4]
-
-	-- load array
-	for j = 1, 16 do
-		t[j] = sunpack("<I4", input, i)
-		i = i + 4
-	end
-
-    -- Round 1
-    a = FF (a, b, c, d, t[ 1], 7, 0xd76aa478)
-    d = FF (d, a, b, c, t[ 2], 12, 0xe8c7b756)
-    c = FF (c, d, a, b, t[ 3], 17, 0x242070db)
-    b = FF (b, c, d, a, t[ 4], 22, 0xc1bdceee)
-    a = FF (a, b, c, d, t[ 5], 7, 0xf57c0faf)
-    d = FF (d, a, b, c, t[ 6], 12, 0x4787c62a)
-    c = FF (c, d, a, b, t[ 7], 17, 0xa8304613)
-    b = FF (b, c, d, a, t[ 8], 22, 0xfd469501)
-    a = FF (a, b, c, d, t[ 9], 7, 0x698098d8)
-    d = FF (d, a, b, c, t[10], 12, 0x8b44f7af)
-    c = FF (c, d, a, b, t[11], 17, 0xffff5bb1)
-    b = FF (b, c, d, a, t[12], 22, 0x895cd7be)
-    a = FF (a, b, c, d, t[13], 7, 0x6b901122)
-    d = FF (d, a, b, c, t[14], 12, 0xfd987193)
-    c = FF (c, d, a, b, t[15], 17, 0xa679438e)
-    b = FF (b, c, d, a, t[16], 22, 0x49b40821)
-
-    -- Round 2
-    a = GG (a, b, c, d, t[ 2], 5, 0xf61e2562)
-    d = GG (d, a, b, c, t[ 7], 9, 0xc040b340)
-    c = GG (c, d, a, b, t[12], 14, 0x265e5a51)
-    b = GG (b, c, d, a, t[ 1], 20, 0xe9b6c7aa)
-    a = GG (a, b, c, d, t[ 6], 5, 0xd62f105d)
-    d = GG (d, a, b, c, t[11], 9,  0x2441453)
-    c = GG (c, d, a, b, t[16], 14, 0xd8a1e681)
-    b = GG (b, c, d, a, t[ 5], 20, 0xe7d3fbc8)
-    a = GG (a, b, c, d, t[10], 5, 0x21e1cde6)
-    d = GG (d, a, b, c, t[15], 9, 0xc33707d6)
-    c = GG (c, d, a, b, t[ 4], 14, 0xf4d50d87)
-    b = GG (b, c, d, a, t[ 9], 20, 0x455a14ed)
-    a = GG (a, b, c, d, t[14], 5, 0xa9e3e905)
-    d = GG (d, a, b, c, t[ 3], 9, 0xfcefa3f8)
-    c = GG (c, d, a, b, t[ 8], 14, 0x676f02d9)
-    b = GG (b, c, d, a, t[13], 20, 0x8d2a4c8a)
-
-    -- Round 3
-    a = HH (a, b, c, d, t[ 6], 4, 0xfffa3942)
-    d = HH (d, a, b, c, t[ 9], 11, 0x8771f681)
-    c = HH (c, d, a, b, t[12], 16, 0x6d9d6122)
-    b = HH (b, c, d, a, t[15], 23, 0xfde5380c)
-    a = HH (a, b, c, d, t[ 2], 4, 0xa4beea44)
-    d = HH (d, a, b, c, t[ 5], 11, 0x4bdecfa9)
-    c = HH (c, d, a, b, t[ 8], 16, 0xf6bb4b60)
-    b = HH (b, c, d, a, t[11], 23, 0xbebfbc70)
-    a = HH (a, b, c, d, t[14], 4, 0x289b7ec6)
-    d = HH (d, a, b, c, t[ 1], 11, 0xeaa127fa)
-    c = HH (c, d, a, b, t[ 4], 16, 0xd4ef3085)
-    b = HH (b, c, d, a, t[ 7], 23,  0x4881d05)
-    a = HH (a, b, c, d, t[10], 4, 0xd9d4d039)
-    d = HH (d, a, b, c, t[13], 11, 0xe6db99e5)
-    c = HH (c, d, a, b, t[16], 16, 0x1fa27cf8)
-    b = HH (b, c, d, a, t[ 3], 23, 0xc4ac5665)
-
-    -- Round 4
-    a = II (a, b, c, d, t[ 1], 6, 0xf4292244)
-    d = II (d, a, b, c, t[ 8], 10, 0x432aff97)
-    c = II (c, d, a, b, t[15], 15, 0xab9423a7)
-    b = II (b, c, d, a, t[ 6], 21, 0xfc93a039)
-    a = II (a, b, c, d, t[13], 6, 0x655b59c3)
-    d = II (d, a, b, c, t[ 4], 10, 0x8f0ccc92)
-    c = II (c, d, a, b, t[11], 15, 0xffeff47d)
-    b = II (b, c, d, a, t[ 2], 21, 0x85845dd1)
-    a = II (a, b, c, d, t[ 9], 6, 0x6fa87e4f)
-    d = II (d, a, b, c, t[16], 10, 0xfe2ce6e0)
-    c = II (c, d, a, b, t[ 7], 15, 0xa3014314)
-    b = II (b, c, d, a, t[14], 21, 0x4e0811a1)
-    a = II (a, b, c, d, t[ 5], 6, 0xf7537e82)
-    d = II (d, a, b, c, t[12], 10, 0xbd3af235)
-    c = II (c, d, a, b, t[ 3], 15, 0x2ad7d2bb)
-    b = II (b, c, d, a, t[10], 21, 0xeb86d391)
-
-	state[1] = (state[1] + a) & 0xffffffff
-	state[2] = (state[2] + b) & 0xffffffff
-	state[3] = (state[3] + c) & 0xffffffff
-	state[4] = (state[4] + d) & 0xffffffff
-end --transform()
-
-local function md5(input)
-	-- initialize state
-	local state = { 0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476 }
-	local inputlen = #input
-	local inputbits = inputlen * 8 -- input length in bits
-	local r = inputlen -- number of unprocessed bytes
-	local i = 1 -- index in input string
-	local ibt = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0} -- input block uint32[16]
-	-- process as many 64-byte blocks as possible
-	while r >= 64 do
-		-- process block
-		transform(state, input, i, ibt)
-		i = i + 64 -- update input index
-		r = r - 64 -- update number of unprocessed bytes
-	end
-	-- finalize.  must append to input a mandatory 0x80 byte, some
-	--  padding, and the input bit-length ('inputbits')
-	local lastblock -- the rest of input .. some padding .. inputbits
-	local padlen -- padding length in bytes
-	if r < 56 then padlen = 55 - r else padlen = 119 - r end
-	lastblock = input:sub(i) -- remaining input
-		.. '\x80' .. ('\0'):rep(padlen)  --padding
-		.. spack("<I8", inputbits) -- length in bits
-	assert(#lastblock == 64 or #lastblock == 128)
-	transform(state, lastblock, 1, ibt)
-	if #lastblock == 128 then
-		transform(state, lastblock, 65, ibt)
-	end
-	-- return the digest
-	local digest = spack("<I4I4I4I4", state[1], state[2], state[3], state[4])
-	return digest
-end --md5()
-
---~ bin = require "plc.bin"
---~ print(bin.stohex(md5'abc'))
---~ print(bin.stohex(md5""))
-
-return {  -- md5 module
-	hash = md5,
-}
-- 
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