Create xor_file.py

xor_file.py

@@ -0,0 +1,36 @@
+#/bin/python
+# -*- coding: utf-8 -*-
+# xor file w/ byte array
+import sys
+
+class xor():
+
+  def xor(self, orginal_file, new_file, xor_var):
+    l = len(xor_var)
+    data = bytearray(open(orginal_file, 'rb').read())
+    result = bytearray((
+      (data[i] ^ xor_var[i % l]) for i in range(0,len(data))
+    ))
+    localFile = open(new_file, 'w')
+    localFile.write(result)
+    localFile.close()
+
+  def hexToByte(self, hexStr):
+    bytes = []
+    hexStr = ''.join( hexStr.split(" ") )
+    for i in range(0, len(hexStr), 2):
+      bytes.append( chr( int (hexStr[i:i+2], 16 ) ) )
+    return bytes
+
+
+if __name__ == '__main__':
+  try:
+    transform = xor()
+    orginal_file = sys.argv[1]
+    new_file = sys.argv[2]
+    bytes = transform.hexToByte(sys.argv[3])
+    xor_var = bytearray(bytes)
+    transform.xor(orginal_file, new_file, xor_var)
+  except IndexError:
+    print('Usage: xor.py <input_file> <output_file> <"XOR hex bytes">')
+    sys.exit(1)