obfuscation.py

alphabet=''.join([chr(i) for i in xrange(256) if chr(i) not in '!"#$&*+-/0123456789;=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ\\^abcdefghijklmnopqrstuvwxyz|' and i != 0])

def filt(s):
    return s.translate(ident,'!"#$&*+-/0123456789;=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ\\^abcdefghijklmnopqrstuvwxyz|')

def obfNum(n):
    """ Obfuscate a number """
    if n==0:
        return "([]<{})"
    elif n==1:
        return "({}<[])"
    elif n==-1:
        return "~"+obfNum(0)
    elif n==-2:
	return "~"+obfNum(1)
    #elif n==3:
    #	 return "~(~"+obfNum(0)+"<<"+obfNum(1)+"<<"+obfNum(1)+")"
    #elif n==-3:
    #	 return "~("+obfNum(1)+")<<"+obfNum(1)+")"
    #elif n==7:
    #	 return "~((~"+obfNum(1)+")<<"+obfNum(1)+"<<"+obfNum(1)+")"
    #elif n==-7:
    #	 return "~(~(~"+obfNum(0)+"<<"+obfNum(1)+"<<"+obfNum(1)+")<<"+obfNum(1)+")"
    if n % 2:
        return "~%s" % obfNum(~n)
    else: 
        return "("+obfNum(n/2)+"<<"+obfNum(1)+")" % 

def obfChar(c):
    """ Obfuscate a character """
    import string
    allowed=''.join([i for i in alphabet if i in string.printable])
    if c in allowed:
	return `c`;
    # Valid :     "\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff"
    if c in '0123456789abcdef':
        s=chr(0xf0+ord(("0%s"%c).decode('hex')))
        return "`'"+s+"'`"+"["+obfNum(4)+"]"
    if c in `True`:
        i=string.rfind(`({}<())`,c)
        return "`({}<())`["+obfNum(i)+"]"
    #if c in `False`:
    #    i=string.rfind(`({}>())`,c)
    #    return "`({}<{})`["+obfNum(i)+"]"
    if c in '"\'\'"':
        i=string.rfind(``''``,c)
        return "``''``["+obfNum(i)+"]"
    # Otherwise generate the char with generating  '%c'%NUM

    return "`'%\xfc'`["+obfNum(1)+"::"+obfNum(4)+"]%"+obfNum(ord(c))

def obfString(s):
    """ Obfuscate a string """
    outs="`["
    for c in s:
        try:
            outs+=""+objChar(c)+","
        except:
            print "char '%s' not found in alphabet" % (c)
            return
    return outs[:-1]+"]`["+obfNum(2)+"::"+obfNum(5)+"]"