From 26a54dd3d6e4aeb8d6f56c9fe4317983124943c2 Mon Sep 17 00:00:00 2001 From: Anonymous Date: Tue, 16 Feb 2010 21:16:23 +0000 Subject: [PATCH] ineptpdf 6 --- ineptpdf.pyw | 87 ++++++++++++++++++++++++++++++---------------------- 1 file changed, 51 insertions(+), 36 deletions(-) diff --git a/ineptpdf.pyw b/ineptpdf.pyw index cac8a5e..8674733 100644 --- a/ineptpdf.pyw +++ b/ineptpdf.pyw @@ -1,6 +1,6 @@ #! /usr/bin/python -# ineptpdf5.pyw, version 5 +# ineptpdf.pyw, version 6 # To run this program install Python 2.6 from http://www.python.org/download/ # and PyCrypto from http://www.voidspace.org.uk/python/modules.shtml#pycrypto @@ -13,7 +13,7 @@ # 3 - Correctly handle PDF >=1.5 cross-reference streams # 4 - Removal of ciando's personal ID (anon) # 5 - removing small bug with V3 ebooks (anon) - +# 6 - changed to adeptkey4.der format for 1.7.2 support (anon) """ Decrypt Adobe ADEPT-encrypted PDF files. """ @@ -34,6 +34,7 @@ import Tkinter import Tkconstants import tkFileDialog import tkMessageBox +import pickle try: from Crypto.Cipher import ARC4 @@ -1170,38 +1171,52 @@ class PDFDocument(object): def initialize_ebx(self, password, docid, param): self.is_printable = self.is_modifiable = self.is_extractable = True - with open(password, 'rb') as f: - keyder = f.read() - key = ASN1Parser([ord(x) for x in keyder]) - key = [bytesToNumber(key.getChild(x).value) for x in xrange(1, 4)] - rsa = RSA.construct(key) - length = int_value(param.get('Length', 0)) / 8 - rights = str_value(param.get('ADEPT_LICENSE')).decode('base64') - rights = zlib.decompress(rights, -15) - rights = etree.fromstring(rights) - expr = './/{http://ns.adobe.com/adept}encryptedKey' - bookkey = ''.join(rights.findtext(expr)).decode('base64') - bookkey = rsa.decrypt(bookkey) - if bookkey[0] != '\x02': - raise ADEPTError('error decrypting book session key') - index = bookkey.index('\0') + 1 - bookkey = bookkey[index:] - ebx_V = int_value(param.get('V', 4)) - ebx_type = int_value(param.get('EBX_ENCRYPTIONTYPE', 6)) - # added because of the booktype / decryption book session key error - if ebx_V == 3: - V = 3 - elif ebx_V < 4 or ebx_type < 6: - V = ord(bookkey[0]) - bookkey = bookkey[1:] - else: - V = 2 - if length and len(bookkey) != length: - raise ADEPTError('error decrypting book session key') - self.decrypt_key = bookkey - self.genkey = self.genkey_v3 if V == 3 else self.genkey_v2 - self.decipher = self.decrypt_rc4 - self.ready = True + with open(password, 'r') as f: + keyderlist = pickle.load(f) + keynotfound = 1 + for keyder in keyderlist: + key = ASN1Parser([ord(x) for x in keyder]) + key = [bytesToNumber(key.getChild(x).value) for x in xrange(1, 4)] + try: + rsa = RSA.construct(key) + except Exception: + continue + length = int_value(param.get('Length', 0)) / 8 + rights = str_value(param.get('ADEPT_LICENSE')).decode('base64') + rights = zlib.decompress(rights, -15) + rights = etree.fromstring(rights) + expr = './/{http://ns.adobe.com/adept}encryptedKey' + bookkey = ''.join(rights.findtext(expr)).decode('base64') + try: + bookkey = rsa.decrypt(bookkey) + except Exception: + continue + if bookkey[0] != '\x02': + keynotfound = 1 + continue + else: + keynotfound = 0 + index = bookkey.index('\0') + 1 + bookkey = bookkey[index:] + ebx_V = int_value(param.get('V', 4)) + ebx_type = int_value(param.get('EBX_ENCRYPTIONTYPE', 6)) + # added because of the booktype / decryption book session key error + if ebx_V == 3: + V = 3 + elif ebx_V < 4 or ebx_type < 6: + V = ord(bookkey[0]) + bookkey = bookkey[1:] + else: + V = 2 + if length and len(bookkey) != length: + raise ADEPTError('error decrypting book session key') + self.decrypt_key = bookkey + self.genkey = self.genkey_v3 if V == 3 else self.genkey_v2 + self.decipher = self.decrypt_rc4 + self.ready = True + break + if keynotfound == 1: + raise ADEPTError('problem decrypting session key') return PASSWORD_PADDING = '(\xbfN^Nu\x8aAd\x00NV\xff\xfa\x01\x08..' \ @@ -1657,8 +1672,8 @@ class DecryptionDialog(Tkinter.Frame): Tkinter.Label(body, text='Key file').grid(row=0) self.keypath = Tkinter.Entry(body, width=30) self.keypath.grid(row=0, column=1, sticky=sticky) - if os.path.exists('adeptkey.der'): - self.keypath.insert(0, 'adeptkey.der') + if os.path.exists('adeptkey4.der'): + self.keypath.insert(0, 'adeptkey4.der') button = Tkinter.Button(body, text="...", command=self.get_keypath) button.grid(row=0, column=2) Tkinter.Label(body, text='Input file').grid(row=1)