##########################################################################
#
#   EXE to BAT converter Version 1.0                                     #
#   This will use the classic DEBUG method to HEX-encode an executable   #
#   into a batch script file. Enjoy.                                     #
#                                                                        #
#                                          rattle | awarenetwork | org   #
                                                                         #
##########################################################################
   
from sys import argv as a, exit, stdout
die = lambda x,n: stdout.write(x+'\n') or exit(n)

try: f,b = open(a[1],'rb'),open(a[2],'w')
except: die('[!] usage: exe2bat.py <exefile> <batchfile>',1);

FOOTER  = ''.join(map(lambda x:"%%E%% "+x+">>T\n",
 ["RCX","%X ","N T.BIN","WDS:0","Q"])) 
FOOTER += 'DEBUG<T 1>NUL\nMOVE T.BIN T.EXE 1>NUL 2>NUL\nT.EXE'

FC,CX = 0, f.seek(0,2) or f.tell()

if (CX > 0xFFFF): 
  f.close(); b.close()
  die('[!] filesize exceeds 64kb, quitting.',1);

f.seek(0,0)
b.write('@ECHO OFF\nSET E=ECHO\nDEL T 1>NUL 2>NUL\n')

for chunk in xrange(0x1000):
  t = f.read(16) or b.write(FOOTER%CX) or die("",0)
  if t.count('\0')==0x10: FC += 1
  else:
    if FC > 0:
      b.write('%%E%% FDS:%X L %X 00>>T\n'%((chunk-FC)*0x10,FC*0x10))
      FC = 0
    b.write('%%E%% EDS:%X '%(chunk*0x10))
    b.write(' '.join(map(lambda x:"%02X"%ord(x),t))+'>>T\n')

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