ntag_getsig: Introduce ntag_getsig

.gitignore

@@ -33,6 +33,7 @@ version.c
 *.json.bak
 *.pyc
 *.bmp
+originalitysig.csv
 
 # new build file for add-ons.
 Makefile.platform

CHANGELOG.md

@@ -3,6 +3,7 @@ All notable changes to this project will be documented in this file.
 This project uses the changelog in accordance with [keepchangelog](http://keepachangelog.com/). Please use this to write notable changes, which is not the same as git commit log...
 
 ## [unreleased][unreleased]
+ - Added a script to dump originality signatures from MFU EV1s and NTAGs (@aveao)
  - Added parsing of EF_CardAccess to display PACE algorithm, version and parameter in `hf emrtd info` (@aveao)
  - Change, numerous commands more uses cliparser (@tcprst, @iceman1001)
  - Added more originality public keys (@anon)

client/luascripts/ntag_getsig.lua

@@ -0,0 +1,104 @@
+local getopt = require('getopt')
+local lib14a = require('read14a')
+local cmds = require('commands')
+local ansicolors = require('ansicolors')
+
+copyright = 'Copyright 2021 A. Ozkal, released under GPLv2+.'
+author = 'Ave'
+version = 'v1.0.0'
+desc = [[
+This script attempts to grab signatures from an NTAG or MFULEV1 card and print it in a machine parsable way
+ ]]
+example = [[
+    script run ntag_getsig
+]]
+usage = [[
+    script run ntag_getsig [-h]
+]]
+arguments = [[
+    -h                   : This help
+]]
+
+local function help()
+    print(author)
+    print(version)
+    print(desc)
+    print(ansicolors.cyan..'Usage'..ansicolors.reset)
+    print(usage)
+    print(ansicolors.cyan..'Arguments'..ansicolors.reset)
+    print(arguments)
+    print(ansicolors.cyan..'Example usage'..ansicolors.reset)
+    print(example)
+end
+
+-- Used to send raw data to the firmware to subsequently forward the data to the card.
+-- from mifareplus.lua
+local function sendRaw(rawdata, crc, power)
+    -- print(("<sent>:       %s"):format(rawdata))
+
+    local flags = lib14a.ISO14A_COMMAND.ISO14A_RAW
+    if crc then
+        flags = flags + lib14a.ISO14A_COMMAND.ISO14A_APPEND_CRC
+    end
+    if power then
+        flags = flags + lib14a.ISO14A_COMMAND.ISO14A_NO_DISCONNECT
+    end
+
+    local command = Command:newMIX{cmd = cmds.CMD_HF_ISO14443A_READER,
+                                arg1 = flags, -- Send raw
+                                arg2 = string.len(rawdata) / 2, -- arg2 contains the length, which is half the length of the ASCII-string rawdata
+                                data = rawdata
+                                }
+    local ignore_response = false
+    local result, err = command:sendMIX(ignore_response)
+    if result then
+        --unpack the first 4 parts of the result as longs, and the last as an extremely long string to later be cut down based on arg1, the number of bytes returned
+        local count,cmd,arg1,arg2,arg3,data = bin.unpack('LLLLH512',result)
+
+        returned_bytes = string.sub(data, 1, arg1 * 2)
+        if #returned_bytes > 0 then
+            -- print(("<recvd>: %s"):format(returned_bytes)) -- need to multiply by 2 because the hex digits are actually two bytes when they are strings
+            return returned_bytes
+        else
+            return nil
+        end
+    else
+        print("Error sending the card raw data.")
+        return nil
+    end
+end
+
+---
+-- The main entry point
+function main(args)
+    -- Read the parameters
+    for o, a in getopt.getopt(args, 'h') do
+        if o == 'h' then return help() end
+    end
+
+    local tag, err = lib14a.read(true, false)
+
+    if not err then
+        local sig = sendRaw("3C00", true, true)
+        local ver = sendRaw("60", true, false)
+        if sig and ver then  -- if false, that's a fail right there
+            sig = string.sub(sig, 0, -5)
+            ver = string.sub(ver, 0, -5)
+            local text = tag.name..","..ver..","..tag.uid..","..sig
+            print(text)
+
+            local filename = "originalitysig.csv"
+            local outfile = io.open(filename, "a")
+            if outfile ~= nil then
+                outfile:write(text.."\n")
+                io.close(outfile)
+            else
+                print(ansicolors.red.."Couldn't open file originalitysig.csv."..ansicolors.reset)
+            end
+        else
+            print(ansicolors.red.."Read FAILED."..ansicolors.reset)
+        end
+    end
+end
+
+main(args)