X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/31b3689f0b54048de31957e001c60bbd8dfca5a3..b9534ca070fcb38d37b572810365bbb4b8ffbc8b:/client/lualibs/utils.lua

diff --git a/client/lualibs/utils.lua b/client/lualibs/utils.lua
index 3015c419..b86b016b 100644
--- a/client/lualibs/utils.lua
+++ b/client/lualibs/utils.lua
@@ -37,9 +37,7 @@ local Utils =
 	------------ FILE READING
 	ReadDumpFile = function (filename)
 	
-		if filename == nil then 
-			return nil, 'Filename is empty'
-		end
+		filename = filename or 'dumpdata.bin'
 		if #filename == 0 then
 			return nil, 'Filename length is zero'
 		end
@@ -55,6 +53,34 @@ local Utils =
 		return hex
 	end,
 	
+	------------ FILE WRITING (EML)
+	--- Writes an eml-file.
+	-- @param uid - the uid of the tag. Used in filename
+	-- @param blockData. Assumed to be on the format {'\0\1\2\3,'\b\e\e\f' ..., 
+	-- that is, blockData[row] contains a string with the actual data, not ascii hex representation 
+	-- return filename if all went well, 
+	-- @reurn nil, error message if unsuccessfulls	
+	WriteDumpFile = function(uid, blockData)
+		local destination = string.format("%s.eml", uid)
+		local file = io.open(destination, "w")
+		if file == nil then 
+			return nil, string.format("Could not write to file %s", destination)
+		end
+		local rowlen = string.len(blockData[1])
+
+		for i,block in ipairs(blockData) do
+			if rowlen ~= string.len(block) then
+				prlog(string.format("WARNING: Dumpdata seems corrupted, line %d was not the same length as line 1",i))
+			end
+
+			local formatString = string.format("H%d", string.len(block))
+			local _,hex = bin.unpack(formatString,block)
+			file:write(hex.."\n")
+		end
+		file:close()	
+		return destination
+	end,
+	
 	------------ string split function
 	Split = function( inSplitPattern, outResults )
 		if not outResults then
@@ -71,8 +97,34 @@ local Utils =
 		return outResults
 	end,
 	
-	------------ CRC-16 ccitt checksums
+	----ISO14443-B CRC
+	Crc14b = function(s)
+		if s == nil then return nil end
+		if #s == 0 then return nil end
+		if  type(s) == 'string' then
+			local utils = require('utils')
+			return utils.ConvertAsciiToHex(
+							core.iso14443b_crc(s)
+							)
+		end
+		return nil		
+	end,
+	
+	------------ CRC-8 Legic checksums
+	-- Takes a hex string and calculates a crc8
+	Crc8Legic = function(s)
+		if s == nil then return nil end
+		if #s == 0 then return nil end
+		if  type(s) == 'string' then
+			local utils = require('utils')
+			local asc = utils.ConvertHexToAscii(s)
+			local hash = core.crc8legic(asc)
+			return hash
+		end
+		return nil
+	end,
 	
+	------------ CRC-16 ccitt checksums
 	-- Takes a hex string and calculates a crc16
 	Crc16 = function(s)
 		if s == nil then return nil end
@@ -85,7 +137,49 @@ local Utils =
 		end
 		return nil
 	end,
+	
+	
+	------------ CRC-64 ecma checksums
+	-- Takes a hex string and calculates a crc64 ecma
+	Crc64 = function(s)
+		if s == nil then return nil end
+		if #s == 0 then return nil end
+		if  type(s) == 'string' then
+			local utils = require('utils')
+			local asc = utils.ConvertHexToAscii(s)
+			local hash = core.crc64(asc)
+			return hash
+		end
+		return nil
+	end,
+
+	------------ SHA1 hash
+	-- Takes a string and calculates a SHA1 hash
+	Sha1 = function(s)
+		if s == nil then return nil end
+		if #s == 0 then return nil end
+		if  type(s) == 'string' then
+			local utils = require('utils')
+			--local asc = utils.ConvertHexToAscii(s)
+			local hash = core.sha1(s)
+			return hash
+		end
+		return nil
+	end,	
+	-- Takes a hex string and calculates a SHA1 hash
+	Sha1Hex = function(s)
+		if s == nil then return nil end
+		if #s == 0 then return nil end
+		if  type(s) == 'string' then
+			local utils = require('utils')
+			local asc = utils.ConvertHexToAscii(s)
+			local hash = core.sha1(asc)
+			return hash
+		end
+		return nil
+	end,	
 
+	
 	-- input parameter is a string
 	-- Swaps the endianess and returns a number,  
 	-- IE:  'cd7a' -> '7acd'  -> 0x7acd
@@ -135,27 +229,25 @@ local Utils =
 		while IN>0 do
 			I=I+1
 			IN , D = math.floor(IN/B), math.modf(IN,B)+1
-			OUT=string.sub(K,D,D)..OUT
+			OUT = string.sub(K,D,D)..OUT
 		end
 		return OUT
 	end,
 	---
 	-- Convert Byte array to string of hex
 	ConvertBytesToHex = function(bytes)
-		if #bytes == 0 then
-			return ''
-		end
+		if bytes == nil then return '' end
+		if #bytes == 0 then return '' end
 		local s={}
-		for i = 1, #(bytes) do
+		for i = 1, #bytes do
 			s[i] = string.format("%02X",bytes[i]) 
 		end
 		return table.concat(s)
 	end,	
 	-- Convert byte array to string with ascii
     ConvertBytesToAscii = function(bytes)
-		if #bytes == 0 then
-			return ''
-		end
+		if bytes == nil then return '' end
+		if #bytes == 0 then return '' end
 		local s={}
 		for i = 1, #(bytes) do
 			s[i] = string.char(bytes[i]) 
@@ -171,24 +263,87 @@ local Utils =
 		end
 		return t
 	end,
-	ConvertAsciiToBytes = function(s)
-		local t={}
+	ConvertAsciiToBytes = function(s, reverse)
+		local t = {}
 		if s == nil then return t end
 		if #s == 0 then return t end
 		
 		for k in s:gmatch"(.)" do
 			table.insert(t, string.byte(k))
 		end
-		return t
+		
+		if not reverse then
+			return t
+		end
+	
+		local rev = {}
+		if reverse then
+			for i = #t, 1,-1 do
+				table.insert(rev, t[i] )
+			end
+		end
+		return rev
 	end,
-	ConvertHexToAscii = function(s)
+	
+	ConvertHexToAscii = function(s, useSafechars)
+		if s == nil then return '' end
+		if #s == 0 then return '' end
 		local t={}
-		if s == nil then return t end
-		if #s == 0 then return t end
 		for k in s:gmatch"(%x%x)" do
-			table.insert(t, string.char(tonumber(k,16)))
+
+			local n = tonumber(k,16)		
+			local c 
+			if useSafechars and ( (n < 32) or (n == 127) ) then
+				c = '.';
+			else
+				c = string.char(n)
+			end
+			table.insert(t,c)
+		end
+		return table.concat(t)	
+	end,
+	
+	ConvertAsciiToHex = function(s)		
+		if s == nil then return '' end
+		if #s == 0 then return '' end
+		local t={}
+		for k in s:gmatch"(.)" do
+			table.insert(t, string.format("%02X", string.byte(k)))
 		end
-		return  table.concat(t)	
+		return table.concat(t)
+	end,
+	
+	Chars2num = function(s)
+        return (s:byte(1)*16777216)+(s:byte(2)*65536)+(s:byte(3)*256)+(s:byte(4))
+	end,
+	
+	-- use length of string to determine 8,16,32,64 bits
+	bytes_to_int = function(str,endian,signed) 
+		local t={str:byte(1,-1)}
+		if endian=="big" then --reverse bytes
+			local tt={}
+			for k=1,#t do
+				tt[#t-k+1]=t[k]
+			end
+			t=tt
+		end
+		local n=0
+		for k=1,#t do
+			n=n+t[k]*2^((k-1)*8)
+		end
+		if signed then
+			n = (n > 2^(#t*8-1) -1) and (n - 2^(#t*8)) or n -- if last bit set, negative.
+		end
+		return n
+	end,
+	
+	-- a simple implementation of a sleep command. Thanks to Mosci
+	-- takes number of seconds to sleep
+	Sleep = function(n)
+		local clock = os.clock
+		local t0 = clock()
+		while clock() - t0 <= n do end
+		return nil	
 	end,
 	
 	-- function convertStringToBytes(str)