[proxmark3-svn] / client / lualibs / utils.lua

--[[\r
	This may be moved to a separate library at some point (Holiman)\r
--]]\r
local Utils = \r
{\r
	-- Asks the user for Yes or No\r
	confirm = function(message, ...)\r
		local answer\r
		message = message .. " [y/n] ?"\r
		repeat\r
			io.write(message)\r
			io.flush()\r
			answer=io.read()\r
			if answer == 'Y' or answer == "y" then\r
				return true\r
			elseif answer == 'N' or answer == 'n' then \r
				return false\r
			end\r
		until false\r
	end,\r
	---\r
	-- Asks the user for input\r
	input = function (message , default)\r
		local answer\r
		if default ~= nil then\r
			message = message .. " (default: ".. default.. " )"\r
		end\r
		message = message .." \n > "\r
		io.write(message)\r
		io.flush()\r
		answer=io.read()\r
		if answer == '' then answer = default end\r
\r
		return answer\r
	end,\r
	\r
	------------ FILE READING\r
	ReadDumpFile = function (filename)\r
	\r
		if filename == nil then \r
			return nil, 'Filename is empty'\r
		end\r
		if #filename == 0 then\r
			return nil, 'Filename length is zero'\r
		end\r
\r
		infile = io.open(filename, "rb")\r
		if infile == nil then \r
			return nil, string.format("Could not read file %s",filename)\r
		end\r
		local t = infile:read("*all")\r
		len = string.len(t)\r
		local  _,hex = bin.unpack(("H%d"):format(len),t)\r
		io.close(infile)\r
		return hex\r
	end,\r
	\r
	------------ string split function\r
	Split = function( inSplitPattern, outResults )\r
		if not outResults then\r
			outResults = {}\r
		end\r
		local start = 1\r
		local splitStart, splitEnd = string.find( self, inSplitPattern, start )\r
		while splitStart do\r
			table.insert( outResults, string.sub( self, start, splitStart-1 ) )\r
			start = splitEnd + 1\r
			splitStart, splitEnd = string.find( self, inSplitPattern, start )\r
		end\r
		table.insert( outResults, string.sub( self, start ) )\r
		return outResults\r
	end,\r
	\r
	------------ CRC-16 ccitt checksums\r
	\r
	-- Takes a hex string and calculates a crc16\r
	Crc16 = function(s)\r
		if s == nil then return nil end\r
		if #s == 0 then return nil end\r
		if  type(s) == 'string' then\r
			local utils = require('utils')\r
			local asc = utils.ConvertHexToAscii(s)\r
			local hash = core.crc16(asc)\r
			return hash\r
		end\r
		return nil\r
	end,\r
\r
	-- input parameter is a string\r
	-- Swaps the endianess and returns a number,  \r
	-- IE:  'cd7a' -> '7acd'  -> 0x7acd\r
	SwapEndianness = function(s, len)\r
		if s == nil then return nil end\r
		if #s == 0 then return '' end\r
		if  type(s) ~= 'string' then return nil end\r
		\r
		local retval = 0\r
		if len == 16 then\r
			local t = s:sub(3,4)..s:sub(1,2)\r
			retval = tonumber(t,16)\r
		elseif len == 24 then\r
			local t = s:sub(5,6)..s:sub(3,4)..s:sub(1,2)\r
			retval = tonumber(t,16)\r
		elseif len == 32 then\r
			local t = s:sub(7,8)..s:sub(5,6)..s:sub(3,4)..s:sub(1,2)\r
			retval = tonumber(t,16)\r
		end\r
		return retval\r
	end,\r
	\r
	-- input parameter is a string\r
	-- Swaps the endianess and returns a string,  \r
	-- IE:  'cd7a' -> '7acd'  -> 0x7acd\r
	SwapEndiannessStr = function(s, len)\r
		if s == nil then return nil end\r
		if #s == 0 then return '' end\r
		if  type(s) ~= 'string' then return nil end\r
		\r
		local retval\r
		if len == 16 then\r
			retval = s:sub(3,4)..s:sub(1,2)\r
		elseif len == 24 then\r
			retval = s:sub(5,6)..s:sub(3,4)..s:sub(1,2)\r
		elseif len == 32 then\r
			retval = s:sub(7,8)..s:sub(5,6)..s:sub(3,4)..s:sub(1,2)\r
		end\r
		return retval\r
	end,	\r
	------------ CONVERSIONS\r
	\r
	--\r
	-- Converts DECIMAL to HEX\r
    ConvertDecToHex = function(IN)\r
		local B,K,OUT,I,D=16,"0123456789ABCDEF","",0\r
		while IN>0 do\r
			I=I+1\r
			IN , D = math.floor(IN/B), math.modf(IN,B)+1\r
			OUT = string.sub(K,D,D)..OUT\r
		end\r
		return OUT\r
	end,\r
	---\r
	-- Convert Byte array to string of hex\r
	ConvertBytesToHex = function(bytes)\r
		if #bytes == 0 then\r
			return ''\r
		end\r
		local s={}\r
		for i = 1, #(bytes) do\r
			s[i] = string.format("%02X",bytes[i]) \r
		end\r
		return table.concat(s)\r
	end,	\r
	-- Convert byte array to string with ascii\r
    ConvertBytesToAscii = function(bytes)\r
		if #bytes == 0 then\r
			return ''\r
		end\r
		local s={}\r
		for i = 1, #(bytes) do\r
			s[i] = string.char(bytes[i]) \r
		end\r
		return table.concat(s)		\r
	end,	 \r
	ConvertHexToBytes = function(s)\r
		local t={}\r
		if s == nil then return t end\r
		if #s == 0 then return t end\r
		for k in s:gmatch"(%x%x)" do\r
			table.insert(t,tonumber(k,16))\r
		end\r
		return t\r
	end,\r
	ConvertAsciiToBytes = function(s)\r
		local t={}\r
		if s == nil then return t end\r
		if #s == 0 then return t end\r
		\r
		for k in s:gmatch"(.)" do\r
			table.insert(t, string.byte(k))\r
		end\r
		return t\r
	end,\r
	ConvertHexToAscii = function(s)\r
		local t={}\r
		if s == nil then return t end\r
		if #s == 0 then return t end\r
		for k in s:gmatch"(%x%x)" do\r
			table.insert(t, string.char(tonumber(k,16)))\r
		end\r
		return  table.concat(t)	\r
	end,\r
	\r
	Chars2num = function(s)\r
        return (s:byte(1)*16777216)+(s:byte(2)*65536)+(s:byte(3)*256)+(s:byte(4))\r
	end,\r
	\r
	-- use length of string to determine 8,16,32,64 bits\r
	bytes_to_int = function(str,endian,signed) \r
		local t={str:byte(1,-1)}\r
		if endian=="big" then --reverse bytes\r
			local tt={}\r
			for k=1,#t do\r
				tt[#t-k+1]=t[k]\r
			end\r
			t=tt\r
		end\r
		local n=0\r
		for k=1,#t do\r
			n=n+t[k]*2^((k-1)*8)\r
		end\r
		if signed then\r
			n = (n > 2^(#t*8-1) -1) and (n - 2^(#t*8)) or n -- if last bit set, negative.\r
		end\r
		return n\r
	end,\r
	\r
	-- function convertStringToBytes(str)\r
	-- local bytes = {}\r
	-- local strLength = string.len(str)\r
	-- for i=1,strLength do\r
		-- table.insert(bytes, string.byte(str, i))\r
	-- end\r
\r
	-- return bytes\r
-- end\r
\r
-- function convertBytesToString(bytes)\r
	-- local bytesLength = table.getn(bytes)\r
	-- local str = ""\r
	-- for i=1,bytesLength do\r
		-- str = str .. string.char(bytes[i])\r
	-- end\r
\r
	-- return str\r
-- end\r
\r
-- function convertHexStringToBytes(str)\r
	-- local bytes = {}\r
	-- local strLength = string.len(str)\r
	-- for k=2,strLength,2 do\r
		-- local hexString = "0x" .. string.sub(str, (k - 1), k)\r
		-- table.insert(bytes, hex.to_dec(hexString))\r
	-- end\r
\r
	-- return bytes\r
-- end\r
\r
-- function convertBytesToHexString(bytes)\r
	-- local str = ""\r
	-- local bytesLength = table.getn(bytes)\r
	-- for i=1,bytesLength do\r
		-- local hexString = string.sub(hex.to_hex(bytes[i]), 3)\r
		-- if string.len(hexString) == 1 then\r
			-- hexString = "0" .. hexString\r
		-- end\r
		-- str = str .. hexString\r
	-- end\r
\r
	-- return str\r
-- end\r
\r
}\r
return Utils
Commit	Line	Data
5b1311fb MHS	1	--[[\r
	2	This may be moved to a separate library at some point (Holiman)\r
	3	--]]\r
	4	local Utils = \r
	5	{\r
	6	-- Asks the user for Yes or No\r
	7	confirm = function(message, ...)\r
	8	local answer\r
	9	message = message .. " [y/n] ?"\r
	10	repeat\r
	11	io.write(message)\r
	12	io.flush()\r
	13	answer=io.read()\r
	14	if answer == 'Y' or answer == "y" then\r
	15	return true\r
	16	elseif answer == 'N' or answer == 'n' then \r
	17	return false\r
	18	end\r
	19	until false\r
	20	end,\r
	21	---\r
	22	-- Asks the user for input\r
	23	input = function (message , default)\r
	24	local answer\r
	25	if default ~= nil then\r
	26	message = message .. " (default: ".. default.. " )"\r
	27	end\r
	28	message = message .." \n > "\r
	29	io.write(message)\r
	30	io.flush()\r
	31	answer=io.read()\r
	32	if answer == '' then answer = default end\r
	33	\r
	34	return answer\r
	35	end,\r
f91f0ebb	36	\r
	37	------------ FILE READING\r
	38	ReadDumpFile = function (filename)\r
	39	\r
	40	if filename == nil then \r
	41	return nil, 'Filename is empty'\r
	42	end\r
	43	if #filename == 0 then\r
	44	return nil, 'Filename length is zero'\r
	45	end\r
	46	\r
	47	infile = io.open(filename, "rb")\r
	48	if infile == nil then \r
	49	return nil, string.format("Could not read file %s",filename)\r
	50	end\r
	51	local t = infile:read("*all")\r
	52	len = string.len(t)\r
	53	local _,hex = bin.unpack(("H%d"):format(len),t)\r
	54	io.close(infile)\r
	55	return hex\r
	56	end,\r
	57	\r
	58	------------ string split function\r
	59	Split = function( inSplitPattern, outResults )\r
	60	if not outResults then\r
	61	outResults = {}\r
	62	end\r
	63	local start = 1\r
	64	local splitStart, splitEnd = string.find( self, inSplitPattern, start )\r
	65	while splitStart do\r
	66	table.insert( outResults, string.sub( self, start, splitStart-1 ) )\r
	67	start = splitEnd + 1\r
	68	splitStart, splitEnd = string.find( self, inSplitPattern, start )\r
	69	end\r
	70	table.insert( outResults, string.sub( self, start ) )\r
	71	return outResults\r
	72	end,\r
	73	\r
	74	------------ CRC-16 ccitt checksums\r
	75	\r
	76	-- Takes a hex string and calculates a crc16\r
	77	Crc16 = function(s)\r
	78	if s == nil then return nil end\r
	79	if #s == 0 then return nil end\r
	80	if type(s) == 'string' then\r
	81	local utils = require('utils')\r
	82	local asc = utils.ConvertHexToAscii(s)\r
	83	local hash = core.crc16(asc)\r
	84	return hash\r
	85	end\r
	86	return nil\r
	87	end,\r
	88	\r
	89	-- input parameter is a string\r
	90	-- Swaps the endianess and returns a number, \r
	91	-- IE: 'cd7a' -> '7acd' -> 0x7acd\r
	92	SwapEndianness = function(s, len)\r
	93	if s == nil then return nil end\r
	94	if #s == 0 then return '' end\r
	95	if type(s) ~= 'string' then return nil end\r
	96	\r
	97	local retval = 0\r
	98	if len == 16 then\r
	99	local t = s:sub(3,4)..s:sub(1,2)\r
100	retval = tonumber(t,16)\r
101	elseif len == 24 then\r
102	local t = s:sub(5,6)..s:sub(3,4)..s:sub(1,2)\r
103	retval = tonumber(t,16)\r
104	elseif len == 32 then\r
105	local t = s:sub(7,8)..s:sub(5,6)..s:sub(3,4)..s:sub(1,2)\r
106	retval = tonumber(t,16)\r
107	end\r
108	return retval\r
109	end,\r
110	\r
5149e37e	111	-- input parameter is a string\r
	112	-- Swaps the endianess and returns a string, \r
	113	-- IE: 'cd7a' -> '7acd' -> 0x7acd\r
	114	SwapEndiannessStr = function(s, len)\r
	115	if s == nil then return nil end\r
	116	if #s == 0 then return '' end\r
	117	if type(s) ~= 'string' then return nil end\r
	118	\r
	119	local retval\r
	120	if len == 16 then\r
	121	retval = s:sub(3,4)..s:sub(1,2)\r
	122	elseif len == 24 then\r
	123	retval = s:sub(5,6)..s:sub(3,4)..s:sub(1,2)\r
	124	elseif len == 32 then\r
	125	retval = s:sub(7,8)..s:sub(5,6)..s:sub(3,4)..s:sub(1,2)\r
	126	end\r
	127	return retval\r
	128	end, \r
f91f0ebb	129	------------ CONVERSIONS\r
f91f0ebb	130	\r
5b1311fb MHS	131	--\r
5b1311fb MHS	132	-- Converts DECIMAL to HEX\r
f91f0ebb	133	ConvertDecToHex = function(IN)\r
5b1311fb MHS	134	local B,K,OUT,I,D=16,"0123456789ABCDEF","",0\r
	135	while IN>0 do\r
	136	I=I+1\r
5149e37e	137	IN , D = math.floor(IN/B), math.modf(IN,B)+1\r
3ac59c7f	138	OUT = string.sub(K,D,D)..OUT\r
5b1311fb MHS	139	end\r
	140	return OUT\r
	141	end,\r
	142	---\r
	143	-- Convert Byte array to string of hex\r
f91f0ebb	144	ConvertBytesToHex = function(bytes)\r
cd5767d4	145	if #bytes == 0 then\r
	146	return ''\r
	147	end\r
	148	local s={}\r
5b1311fb	149	for i = 1, #(bytes) do\r
9b989c45	150	s[i] = string.format("%02X",bytes[i]) \r
5b1311fb MHS	151	end\r
	152	return table.concat(s)\r
	153	end, \r
cd5767d4	154	-- Convert byte array to string with ascii\r
f91f0ebb	155	ConvertBytesToAscii = function(bytes)\r
cd5767d4	156	if #bytes == 0 then\r
	157	return ''\r
	158	end\r
	159	local s={}\r
	160	for i = 1, #(bytes) do\r
	161	s[i] = string.char(bytes[i]) \r
	162	end\r
	163	return table.concat(s) \r
	164	end, \r
f91f0ebb	165	ConvertHexToBytes = function(s)\r
9b989c45	166	local t={}\r
cd5767d4	167	if s == nil then return t end\r
cd5767d4	168	if #s == 0 then return t end\r
9b989c45	169	for k in s:gmatch"(%x%x)" do\r
	170	table.insert(t,tonumber(k,16))\r
	171	end\r
	172	return t\r
	173	end,\r
f91f0ebb	174	ConvertAsciiToBytes = function(s)\r
cd5767d4	175	local t={}\r
	176	if s == nil then return t end\r
	177	if #s == 0 then return t end\r
	178	\r
	179	for k in s:gmatch"(.)" do\r
	180	table.insert(t, string.byte(k))\r
	181	end\r
	182	return t\r
	183	end,\r
47cbb2d4	184	ConvertHexToAscii = function(s)\r
	185	local t={}\r
	186	if s == nil then return t end\r
	187	if #s == 0 then return t end\r
	188	for k in s:gmatch"(%x%x)" do\r
	189	table.insert(t, string.char(tonumber(k,16)))\r
	190	end\r
	191	return table.concat(t) \r
	192	end,\r
9b989c45	193	\r
3ac59c7f	194	Chars2num = function(s)\r
	195	return (s:byte(1)16777216)+(s:byte(2)65536)+(s:byte(3)*256)+(s:byte(4))\r
	196	end,\r
	197	\r
	198	-- use length of string to determine 8,16,32,64 bits\r
	199	bytes_to_int = function(str,endian,signed) \r
	200	local t={str:byte(1,-1)}\r
	201	if endian=="big" then --reverse bytes\r
	202	local tt={}\r
	203	for k=1,#t do\r
	204	tt[#t-k+1]=t[k]\r
	205	end\r
	206	t=tt\r
	207	end\r
	208	local n=0\r
	209	for k=1,#t do\r
	210	n=n+t[k]2^((k-1)8)\r
	211	end\r
	212	if signed then\r
	213	n = (n > 2^(#t8-1) -1) and (n - 2^(#t8)) or n -- if last bit set, negative.\r
	214	end\r
	215	return n\r
	216	end,\r
	217	\r
9b989c45	218	-- function convertStringToBytes(str)\r
	219	-- local bytes = {}\r
	220	-- local strLength = string.len(str)\r
	221	-- for i=1,strLength do\r
	222	-- table.insert(bytes, string.byte(str, i))\r
	223	-- end\r
	224	\r
	225	-- return bytes\r
	226	-- end\r
	227	\r
	228	-- function convertBytesToString(bytes)\r
	229	-- local bytesLength = table.getn(bytes)\r
	230	-- local str = ""\r
	231	-- for i=1,bytesLength do\r
	232	-- str = str .. string.char(bytes[i])\r
	233	-- end\r
	234	\r
	235	-- return str\r
	236	-- end\r
	237	\r
	238	-- function convertHexStringToBytes(str)\r
	239	-- local bytes = {}\r
	240	-- local strLength = string.len(str)\r
	241	-- for k=2,strLength,2 do\r
	242	-- local hexString = "0x" .. string.sub(str, (k - 1), k)\r
	243	-- table.insert(bytes, hex.to_dec(hexString))\r
	244	-- end\r
	245	\r
	246	-- return bytes\r
	247	-- end\r
	248	\r
	249	-- function convertBytesToHexString(bytes)\r
	250	-- local str = ""\r
	251	-- local bytesLength = table.getn(bytes)\r
	252	-- for i=1,bytesLength do\r
	253	-- local hexString = string.sub(hex.to_hex(bytes[i]), 3)\r
	254	-- if string.len(hexString) == 1 then\r
	255	-- hexString = "0" .. hexString\r
	256	-- end\r
	257	-- str = str .. hexString\r
	258	-- end\r
	259	\r
	260	-- return str\r
	261	-- end\r
	262	\r
5b1311fb MHS	263	}\r
5b1311fb MHS	264	return Utils