#!/usr/bin/python # # Stolen from Ero Carrera # http://blog.dkbza.org/2007/05/scanning-data-for-entropy-anomalies.html import math, string, sys, fileinput def range_bytes (): return range(256) def range_printable(): return (ord(c) for c in string.printable) def H(data, iterator=range_bytes): if not data: return 0 entropy = 0 for x in iterator(): p_x = float(data.count(chr(x)))/len(data) if p_x > 0: entropy += - p_x*math.log(p_x, 2) return entropy def main (): for row in fileinput.input(): string = row.rstrip('\n') print ("%s: %f" % (string, H(string, range_printable))) for str in ['gargleblaster', 'tripleee', 'magnus', 'lkjasdlk', 'aaaaaaaa', 'sadfasdfasdf', '7&wS/p(']: print ("%s: %f" % (str, H(str, range_printable)))
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