Update hf-writer.lua

Adapted your script to the coding standards

client/luascripts/hf-writer.lua

@@ -7,6 +7,28 @@ local a = 0
 local b = 0
 local tab = string.rep('-', 64)
 
+copyright = ''
+author = 'Winds'
+version = 'v1.0.0'
+desc = [[
+    That's script gives for you a easy way to write your an *.eml dumps, using a Proxmark 3.
+    It's working for 4 and 7 bytes NXP MIFARE Classic 1K cards.
+    The script has including an injection of UID changig for the Chinese Magic Cards GEN 3.
+    
+    Whith choosen an *.eml file you can do:
+
+    1. Write it to the equals of current card UID.
+    2. Write it to anther card with changable UID.
+    3. Send command to lock UID for the Chinese Magic Cards GEN 3.
+    4. Erease all data at the card and set the FFFFFFFFFFFF keys, and Access Conditions to 78778800.
+]]
+example = [[
+    1. script run hf-writer
+]]
+usage = [[
+    You should choose your *.eml dump from being list to write it to the card by wizard
+]]
+
 local function read()
     u = read14a.read(true, true).uid
     return u
@@ -22,12 +44,14 @@ local function finish()
     core.clearCommandBuffer()
 end
 
-local function wait() read14a.waitFor14443a() end
+local function wait()
+    read14a.waitFor14443a()
+end
 
+local function main(args)
+    --File lienght check for detect 4 or 7 bytes
     wait()
-
     print(tab)
-
     if string.len(read()) == 14 then -- Detect 7 byte card
         l = 29 -- 7 byte length of eml file
         s = 7
@@ -37,7 +61,7 @@ else
         s = 7
         e = 14
     end 
-
+    ---Listern EML files at Client catalog
     for _ in io.popen([[dir ".\" /b]]):lines() do -- for UNIX: ls
         if string.find(_, '%.eml$') then
             if string.len(_) == l then -- There length of eml file
@@ -59,7 +83,7 @@ local dump = io.open('./hf-mf-' .. uid[no] .. '-data.eml', 'r');
 
     print(tab)
     print(' You have been selected ' .. no .. ' card dump, it UID is ' .. uid[no])  
-
+    ---EML get B key from opened EML file
     for _ in dump:lines() do table.insert(eml, _); end
     for i = 1, #eml do
         if (i % 4 == 0) then
@@ -72,7 +96,7 @@ for i = 1, #eml do
     end 
 
     print(tab)  
-
+    ---UID Changing
     if (utils.confirm(' Do the UID changing?') == true) then
         wait()
         core.console('hf 14a raw -s -c -t 2000 90f0cccc10' .. tostring(eml[1]))
@@ -81,14 +105,14 @@ if (utils.confirm(' Do the UID changing?') == true) then
     end 
 
     print(tab)  
-
+    ---UID Blocking
     if (utils.confirm(' Would you like to BLOCK the UID for any changing?') == true) then
         wait()
         core.console('hf 14a raw -s -c -t 2000 90fd111100')
     end 
 
     print(tab)  
-
+    ---Wriiting block
     if (utils.confirm(' At this case are you using a Blank Card?') == true) then
         wait()
         for i = 1, #eml do
@@ -122,3 +146,12 @@ else
         end
     end
     finish()
+end
+main(args)
+
+---General thinks for the future:
+---Add support another types of dumps: BIN, JSON
+---Maybe it will be not only as `hf-writer`, like a universal dump manager.
+---Add undependence from the operation system. At the moment code not working in Linux.
+---Add more chinesse backdoors RAW commands for UID changing (find RAW for the 4 byte familiar chinese card, from native it soft: http://bit.ly/39VIDsU)
+---Hide system messages when you writing a dumps, replace it to some of like [#####----------] 40%