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ineptpdf 6.1
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87
ineptpdf.pyw
87
ineptpdf.pyw
@ -1,6 +1,6 @@
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#! /usr/bin/python
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# ineptpdf.pyw, version 6
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# ineptpdf.pyw, version 6.1
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# To run this program install Python 2.6 from http://www.python.org/download/
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# and PyCrypto from http://www.voidspace.org.uk/python/modules.shtml#pycrypto
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@ -14,6 +14,7 @@
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# 4 - Removal of ciando's personal ID (anon)
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# 5 - removing small bug with V3 ebooks (anon)
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# 6 - changed to adeptkey4.der format for 1.7.2 support (anon)
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# 6.1 - backward compatibility for 1.7.1 and old adeptkey.der
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"""
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Decrypt Adobe ADEPT-encrypted PDF files.
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"""
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@ -34,7 +35,6 @@ import Tkinter
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import Tkconstants
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import tkFileDialog
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import tkMessageBox
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import pickle
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try:
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from Crypto.Cipher import ARC4
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@ -1171,53 +1171,40 @@ class PDFDocument(object):
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def initialize_ebx(self, password, docid, param):
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self.is_printable = self.is_modifiable = self.is_extractable = True
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with open(password, 'r') as f:
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keyderlist = pickle.load(f)
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keynotfound = 1
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for keyder in keyderlist:
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key = ASN1Parser([ord(x) for x in keyder])
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key = [bytesToNumber(key.getChild(x).value) for x in xrange(1, 4)]
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try:
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rsa = RSA.construct(key)
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except Exception:
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continue
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length = int_value(param.get('Length', 0)) / 8
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rights = str_value(param.get('ADEPT_LICENSE')).decode('base64')
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rights = zlib.decompress(rights, -15)
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rights = etree.fromstring(rights)
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expr = './/{http://ns.adobe.com/adept}encryptedKey'
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bookkey = ''.join(rights.findtext(expr)).decode('base64')
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try:
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bookkey = rsa.decrypt(bookkey)
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except Exception:
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continue
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if bookkey[0] != '\x02':
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keynotfound = 1
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continue
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else:
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keynotfound = 0
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index = bookkey.index('\0') + 1
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bookkey = bookkey[index:]
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ebx_V = int_value(param.get('V', 4))
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ebx_type = int_value(param.get('EBX_ENCRYPTIONTYPE', 6))
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# added because of the booktype / decryption book session key error
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if ebx_V == 3:
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V = 3
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elif ebx_V < 4 or ebx_type < 6:
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V = ord(bookkey[0])
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bookkey = bookkey[1:]
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else:
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V = 2
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if length and len(bookkey) != length:
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raise ADEPTError('error decrypting book session key')
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self.decrypt_key = bookkey
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self.genkey = self.genkey_v3 if V == 3 else self.genkey_v2
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self.decipher = self.decrypt_rc4
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self.ready = True
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break
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if keynotfound == 1:
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raise ADEPTError('problem decrypting session key')
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with open(password, 'rb') as f:
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keyder = f.read()
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key = ASN1Parser([ord(x) for x in keyder])
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key = [bytesToNumber(key.getChild(x).value) for x in xrange(1, 4)]
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rsa = RSA.construct(key)
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length = int_value(param.get('Length', 0)) / 8
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rights = str_value(param.get('ADEPT_LICENSE')).decode('base64')
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rights = zlib.decompress(rights, -15)
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rights = etree.fromstring(rights)
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expr = './/{http://ns.adobe.com/adept}encryptedKey'
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bookkey = ''.join(rights.findtext(expr)).decode('base64')
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bookkey = rsa.decrypt(bookkey)
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if bookkey[0] != '\x02':
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raise ADEPTError('error decrypting book session key')
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index = bookkey.index('\0') + 1
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bookkey = bookkey[index:]
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ebx_V = int_value(param.get('V', 4))
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ebx_type = int_value(param.get('EBX_ENCRYPTIONTYPE', 6))
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# added because of the booktype / decryption book session key error
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if ebx_V == 3:
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V = 3
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elif ebx_V < 4 or ebx_type < 6:
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V = ord(bookkey[0])
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bookkey = bookkey[1:]
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else:
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V = 2
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if length and len(bookkey) != length:
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raise ADEPTError('error decrypting book session key')
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self.decrypt_key = bookkey
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self.genkey = self.genkey_v3 if V == 3 else self.genkey_v2
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self.decipher = self.decrypt_rc4
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self.ready = True
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return
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PASSWORD_PADDING = '(\xbfN^Nu\x8aAd\x00NV\xff\xfa\x01\x08..' \
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'\x00\xb6\xd0h>\x80/\x0c\xa9\xfedSiz'
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@ -1672,8 +1659,8 @@ class DecryptionDialog(Tkinter.Frame):
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Tkinter.Label(body, text='Key file').grid(row=0)
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self.keypath = Tkinter.Entry(body, width=30)
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self.keypath.grid(row=0, column=1, sticky=sticky)
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if os.path.exists('adeptkey4.der'):
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self.keypath.insert(0, 'adeptkey4.der')
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if os.path.exists('adeptkey.der'):
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self.keypath.insert(0, 'adeptkey.der')
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button = Tkinter.Button(body, text="...", command=self.get_keypath)
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button.grid(row=0, column=2)
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Tkinter.Label(body, text='Input file').grid(row=1)
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