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https://github.com/RfidResearchGroup/proxmark3.git
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CHG - some lua functions in utils.lua
This commit is contained in:
iceman1001
parent
47cbb2d418
commit
f91f0ebb35
3 changed files with 101 additions and 64 deletions
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@ -117,10 +117,10 @@ local _commands = {
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local _reverse_lookup,k,v = {}
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for k, v in pairs(_commands) do
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_reverse_lookup[v] = k
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end
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_commands.tostring = function(command)
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for k, v in pairs(_commands) do
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_reverse_lookup[v] = k
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end
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_commands.tostring = function(command)
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if(type(command) == 'number') then
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return ("%s (%d)"):format(_reverse_lookup[command]or "ERROR UNDEFINED!", command)
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end
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@ -182,7 +182,6 @@ function Command:getBytes()
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local cmd = self.cmd
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local arg1, arg2, arg3 = self.arg1, self.arg2, self.arg3
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return bin.pack("LLLLH",cmd, arg1, arg2, arg3,data);
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end
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return _commands
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@ -33,9 +33,86 @@ local Utils =
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return answer
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end,
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------------ FILE READING
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ReadDumpFile = function (filename)
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if filename == nil then
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return nil, 'Filename is empty'
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end
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if #filename == 0 then
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return nil, 'Filename length is zero'
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end
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infile = io.open(filename, "rb")
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if infile == nil then
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return nil, string.format("Could not read file %s",filename)
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end
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local t = infile:read("*all")
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len = string.len(t)
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local _,hex = bin.unpack(("H%d"):format(len),t)
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io.close(infile)
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return hex
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end,
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------------ string split function
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Split = function( inSplitPattern, outResults )
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if not outResults then
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outResults = {}
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end
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local start = 1
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local splitStart, splitEnd = string.find( self, inSplitPattern, start )
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while splitStart do
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table.insert( outResults, string.sub( self, start, splitStart-1 ) )
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start = splitEnd + 1
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splitStart, splitEnd = string.find( self, inSplitPattern, start )
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end
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table.insert( outResults, string.sub( self, start ) )
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return outResults
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end,
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------------ CRC-16 ccitt checksums
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-- Takes a hex string and calculates a crc16
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Crc16 = function(s)
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if s == nil then return nil end
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if #s == 0 then return nil end
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if type(s) == 'string' then
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local utils = require('utils')
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local asc = utils.ConvertHexToAscii(s)
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local hash = core.crc16(asc)
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return hash
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end
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return nil
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end,
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-- input parameter is a string
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-- Swaps the endianess and returns a number,
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-- IE: 'cd7a' -> '7acd' -> 0x7acd
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SwapEndianness = function(s, len)
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if s == nil then return nil end
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if #s == 0 then return '' end
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if type(s) ~= 'string' then return nil end
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local retval = 0
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if len == 16 then
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local t = s:sub(3,4)..s:sub(1,2)
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retval = tonumber(t,16)
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elseif len == 24 then
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local t = s:sub(5,6)..s:sub(3,4)..s:sub(1,2)
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retval = tonumber(t,16)
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elseif len == 32 then
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local t = s:sub(7,8)..s:sub(5,6)..s:sub(3,4)..s:sub(1,2)
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retval = tonumber(t,16)
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end
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return retval
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end,
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------------ CONVERSIONS
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--
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-- Converts DECIMAL to HEX
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ConvertDec2Hex = function(IN)
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ConvertDecToHex = function(IN)
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local B,K,OUT,I,D=16,"0123456789ABCDEF","",0
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while IN>0 do
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I=I+1
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@ -46,7 +123,7 @@ local Utils =
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end,
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---
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-- Convert Byte array to string of hex
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ConvertBytes2HexString = function(bytes)
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ConvertBytesToHex = function(bytes)
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if #bytes == 0 then
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return ''
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end
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@ -57,7 +134,7 @@ local Utils =
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return table.concat(s)
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end,
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-- Convert byte array to string with ascii
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ConvertBytesToAsciiString = function(bytes)
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ConvertBytesToAscii = function(bytes)
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if #bytes == 0 then
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return ''
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end
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@ -67,7 +144,7 @@ local Utils =
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end
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return table.concat(s)
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end,
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ConvertHexStringToBytes = function(s)
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ConvertHexToBytes = function(s)
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local t={}
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if s == nil then return t end
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if #s == 0 then return t end
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@ -76,7 +153,7 @@ local Utils =
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end
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return t
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end,
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ConvertAsciiStringToBytes = function(s)
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ConvertAsciiToBytes = function(s)
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local t={}
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if s == nil then return t end
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if #s == 0 then return t end
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@ -28,10 +28,10 @@ Arguments:
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-o : filename for the saved dumps
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]]
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local hashconstant = '20436F707972696768742028432920323031302041637469766973696F6E2E20416C6C205269676874732052657365727665642E20'
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local HASHCONSTANT = '20436F707972696768742028432920323031302041637469766973696F6E2E20416C6C205269676874732052657365727665642E20'
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local TIMEOUT = 2000 -- Shouldn't take longer than 2 seconds
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local DEBUG = true -- the debug flag
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local DEBUG = false -- the debug flag
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local numBlocks = 64
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local numSectors = 16
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---
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@ -154,14 +154,17 @@ local function main(args)
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core.console( ('hf mf nested 1 0 A %s d'):format(keyA) )
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end
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core.clearCommandBuffer()
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-- Loading keyfile
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print('Loading dumpkeys.bin')
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local infile = io.open(input, "rb")
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if infile == nil then
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return oops('Could not read file ', input)
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local hex, err = utils.ReadDumpFile(input)
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if not hex then
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return oops(err)
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end
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local akeys = readdumpkeys(infile):sub(0,12*16)
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local akeys = hex:sub(0,12*16)
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-- Read block 0
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cmd = Command:new{cmd = cmds.CMD_MIFARE_READBL, arg1 = 0,arg2 = 0,arg3 = 0, data = keyA}
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err = core.SendCommand(cmd:getBytes())
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@ -206,13 +209,13 @@ local function main(args)
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-- Block 0-7 not encrypted
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blocks[blockNo+1] = ('%02d :: %s'):format(blockNo,blockdata)
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else
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local base = ('%s%s%02x%s'):format(block0, block1, blockNo, hashconstant)
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local base = ('%s%s%02x%s'):format(block0, block1, blockNo, HASHCONSTANT)
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local baseStr = utils.ConvertHexToAscii(base)
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local md5hash = md5.sumhexa(baseStr)
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local aestest = core.aes(md5hash, blockdata)
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local hex = utils.ConvertAsciiStringToBytes(aestest)
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hex = utils.ConvertBytes2HexString(hex)
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local hex = utils.ConvertAsciiToBytes(aestest)
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hex = utils.ConvertBytesToHex(hex)
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--local _,hex = bin.unpack(("H%d"):format(16),aestest)
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-- blocks with zero not encrypted.
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@ -238,8 +241,8 @@ local function main(args)
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for _,s in pairs(blocks) do
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local slice = s:sub(8,#s)
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local str = utils.ConvertBytesToAsciiString(
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utils.ConvertHexStringToBytes(slice)
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local str = utils.ConvertBytesToAscii(
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utils.ConvertHexToBytes(slice)
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)
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emldata = emldata..slice..'\n'
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for c in (str):gmatch('.') do
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@ -266,47 +269,5 @@ local function main(args)
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print( (' CARDID : 0x%s'):format(cardid ) )
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print( string.rep('--',20) )
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print('Validating checksums')
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-- Checksum Typ 0
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local test1 = ('%s%s'):format(block0, block1:sub(1,28))
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local crc = block1:sub(29,32)
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local revcrc = reverseCrcBytes(crc)
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io.write( ('BLOCK 0-1 : %04x = %04x \n'):format(revcrc,computeCrc16(test1)))
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-- Checksum Typ 1 BLOCK 9
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local block9 = blocks[9]:sub(8,35)
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test1 = ('%s0500'):format(block9)
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crc = blocks[9]:sub(36,39)
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revcrc = reverseCrcBytes(crc)
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io.write( ('BLOCK 8 : %04x = %04x \n'):format(revcrc,computeCrc16(test1)))
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-- Checksum Typ 1 BLOCK 37
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local block37 = blocks[37]:sub(8,35)
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test1 = ('%s0500'):format(block37)
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crc = blocks[37]:sub(36,39)
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revcrc = reverseCrcBytes(crc)
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io.write( ('BLOCK 36 : %04x = %04x \n'):format(revcrc,computeCrc16(test1)))
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-- Checksum Typ 2
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-- 10,11,13
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test1 = blocks[10]:sub(8,39)..
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blocks[11]:sub(8,39)..
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blocks[13]:sub(8,39)
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crc = blocks[9]:sub(32,35)
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revcrc = reverseCrcBytes(crc)
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io.write( ('BLOCK 10-11-13 :%04x = %04x \n'):format(revcrc,computeCrc16(test1)))
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-- Checksum Typ 3
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-- 15,17,18,19
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crc = blocks[9]:sub(28,31)
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revcrc = reverseCrcBytes(crc)
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test1 = blocks[14]:sub(8,39)..
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blocks[15]:sub(8,39)..
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blocks[17]:sub(8,39)
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local tohash = test1..string.rep('00',0xe0)
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local hashed = computeCrc16(tohash)
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io.write( ('BLOCK 14-15-17 %04x = %04x \n'):format(revcrc,hashed))
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end
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main(args)
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