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Update packer.py

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Optimized using pep8 online
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swan46 2018-04-24 22:46:59 +02:00 committed by GitHub
parent 090f478ad1
commit df10f2bde8
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1 changed files with 12 additions and 11 deletions
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23
python/jsbeautifier/unpackers/packer.py
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@ -3,8 +3,6 @@
# by Einar Lielmanis <einar@jsbeautifier.org>
#
# written by Stefano Sanfilippo <a.little.coder@gmail.com>
# Updated to handle radix 33..61 properly swan46 <eleonora45@gmx.net>
# Updated to handle string begin and end properly swan46 <eleonora45@gmx.net>
#
# usage:
#
@ -20,6 +18,7 @@ from jsbeautifier.unpackers import UnpackingError
PRIORITY = 1
def detect(source):
global beginstr
global endstr
@ -27,7 +26,7 @@ def detect(source):
endstr = ''
"""Detects whether `source` is P.A.C.K.E.R. coded."""
mystr = source.replace(' ', '').find('eval(function(p,a,c,k,e,')
if(mystr > 0):
if(mystr > 0):
beginstr = source[:mystr]
if(mystr != -1):
""" Find endstr"""
@ -38,7 +37,8 @@ def detect(source):
endstr = ''
else:
endstr = source.split("')))", 1)[1]
return ( mystr != -1 )
return (mystr != -1)
def unpack(source):
"""Unpacks P.A.C.K.E.R. packed js code."""
@ -54,12 +54,13 @@ def unpack(source):
def lookup(match):
"""Look up symbols in the synthetic symtab."""
word = match.group(0)
word = match.group(0)
return symtab[unbase(word)] or word
source = re.sub(r'\b\w+\b', lookup, payload)
return _replacestrings(source)
def _filterargs(source):
"""Juice from a source file the four args needed by decoder."""
juicers = [ (r"}\('(.*)', *(\d+), *(\d+), *'(.*)'\.split\('\|'\), *(\d+), *(.*)\)\)"),
@ -78,7 +79,6 @@ def _filterargs(source):
raise UnpackingError('Could not make sense of p.a.c.k.e.r data (unexpected code structure)')
def _replacestrings(source):
global beginstr
global endstr
@ -99,9 +99,9 @@ def _replacestrings(source):
class Unbaser(object):
"""Functor for a given base. Will efficiently convert
strings to natural numbers."""
ALPHABET = {
62 : '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ',
95 : (' !"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ'
ALPHABET = {
62: '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ',
95: (' !"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ'
'[\]^_`abcdefghijklmnopqrstuvwxyz{|}~')
}
@ -109,9 +109,9 @@ class Unbaser(object):
self.base = base
# fill elements 37...61, if necessary
if 36 < base < 62:
if 36 < base < 62:
if not hasattr(self.ALPHABET, self.ALPHABET[62][:base]):
self.ALPHABET[base] = self.ALPHABET[62][:base]
self.ALPHABET[base] = self.ALPHABET[62][:base]
#attrs = self.ALPHABET
#print ', '.join("%s: %s" % item for item in attrs.items())
# If base can be handled by int() builtin, let it do it for us
@ -136,3 +136,4 @@ class Unbaser(object):
for index, cipher in enumerate(string[::-1]):
ret += (self.base ** index) * self.dictionary[cipher]
return ret