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Version to 7.0.1, ineptpdf fixes

Browse source 
ineptpdf should now decrypt at least some Adobe PDFs
This commit is contained in:
Apprentice Harper 2020-12-30 12:14:04 +00:00
parent f6a568bcc1
commit c4581b4d72
2 changed files with 171 additions and 164 deletions
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5
DeDRM_plugin/__init__.py
View file

@ -69,8 +69,9 @@ __docformat__ = 'restructuredtext en'
# 6.6.3 - More cleanup of kindle book names and start of support for .kinf2018 # 6.6.3 - More cleanup of kindle book names and start of support for .kinf2018
# 6.7.0 - Handle new library in calibre. # 6.7.0 - Handle new library in calibre.
# 6.8.0 - Full support for .kinf2018 and new KFX encryption (Kindle for PC/Mac 2.5+) # 6.8.0 - Full support for .kinf2018 and new KFX encryption (Kindle for PC/Mac 2.5+)
# 6.8.1 - Kindle key fix for Mac OS X Big Syr # 6.8.1 - Kindle key fix for Mac OS X Big Sur
# 7.0.0 - Switched to Python 3 for calibre 5.0. Thanks to all who comtibuted # 7.0.0 - Switched to Python 3 for calibre 5.0. Thanks to all who contributed
# 7.0.1 - More Python 3 changes. Adobe PDF decryption should now work in some cases
""" """
Decrypt DRMed ebooks. Decrypt DRMed ebooks.

326
DeDRM_plugin/ineptpdf.py Normal file → Executable file
View file

@ -54,12 +54,14 @@ Decrypts Adobe ADEPT-encrypted PDF files.
__license__ = 'GPL v3' __license__ = 'GPL v3'
__version__ = "9.0.0" __version__ = "9.0.0"
import codecs
import sys import sys
import os import os
import re import re
import zlib import zlib
import struct import struct
import hashlib import hashlib
from io import BytesIO
from decimal import Decimal from decimal import Decimal
import itertools import itertools
import xml.etree.ElementTree as etree import xml.etree.ElementTree as etree
@ -403,7 +405,6 @@ def _load_crypto():
ARC4, RSA, AES = _load_crypto() ARC4, RSA, AES = _load_crypto()
from io import BytesIO
# Do we generate cross reference streams on output? # Do we generate cross reference streams on output?
@ -472,16 +473,16 @@ class PSLiteral(PSObject):
Use PSLiteralTable.intern() instead. Use PSLiteralTable.intern() instead.
''' '''
def __init__(self, name): def __init__(self, name):
self.name = name self.name = name.decode('utf-8')
return return
def __repr__(self): def __repr__(self):
name = [] name = []
for char in self.name: for char in self.name:
if not char.isalnum(): if not char.isalnum():
char = b'#%02x' % ord(char) char = '#%02x' % ord(char)
name.append(char) name.append(char)
return b'/%s' % ''.join(name) return '/%s' % ''.join(name)
# PSKeyword # PSKeyword
class PSKeyword(PSObject): class PSKeyword(PSObject):
@ -491,7 +492,7 @@ class PSKeyword(PSObject):
Use PSKeywordTable.intern() instead. Use PSKeywordTable.intern() instead.
''' '''
def __init__(self, name): def __init__(self, name):
self.name = name self.name = name.decode('utf-8')
return return
def __repr__(self): def __repr__(self):
@ -521,12 +522,12 @@ PSLiteralTable = PSSymbolTable(PSLiteral)
PSKeywordTable = PSSymbolTable(PSKeyword) PSKeywordTable = PSSymbolTable(PSKeyword)
LIT = PSLiteralTable.intern LIT = PSLiteralTable.intern
KWD = PSKeywordTable.intern KWD = PSKeywordTable.intern
KEYWORD_BRACE_BEGIN = KWD('{') KEYWORD_BRACE_BEGIN = KWD(b'{')
KEYWORD_BRACE_END = KWD('}') KEYWORD_BRACE_END = KWD(b'}')
KEYWORD_ARRAY_BEGIN = KWD('[') KEYWORD_ARRAY_BEGIN = KWD(b'[')
KEYWORD_ARRAY_END = KWD(']') KEYWORD_ARRAY_END = KWD(b']')
KEYWORD_DICT_BEGIN = KWD('<<') KEYWORD_DICT_BEGIN = KWD(b'<<')
KEYWORD_DICT_END = KWD('>>') KEYWORD_DICT_END = KWD(b'>>')
def literal_name(x): def literal_name(x):
@ -548,18 +549,18 @@ def keyword_name(x):
## PSBaseParser ## PSBaseParser
## ##
EOL = re.compile(r'[\r\n]') EOL = re.compile(rb'[\r\n]')
SPC = re.compile(r'\s') SPC = re.compile(rb'\s')
NONSPC = re.compile(r'\S') NONSPC = re.compile(rb'\S')
HEX = re.compile(r'[0-9a-fA-F]') HEX = re.compile(rb'[0-9a-fA-F]')
END_LITERAL = re.compile(r'[#/%\[\]()<>{}\s]') END_LITERAL = re.compile(rb'[#/%\[\]()<>{}\s]')
END_HEX_STRING = re.compile(r'[^\s0-9a-fA-F]') END_HEX_STRING = re.compile(rb'[^\s0-9a-fA-F]')
HEX_PAIR = re.compile(r'[0-9a-fA-F]{2}|.') HEX_PAIR = re.compile(rb'[0-9a-fA-F]{2}|.')
END_NUMBER = re.compile(r'[^0-9]') END_NUMBER = re.compile(rb'[^0-9]')
END_KEYWORD = re.compile(r'[#/%\[\]()<>{}\s]') END_KEYWORD = re.compile(rb'[#/%\[\]()<>{}\s]')
END_STRING = re.compile(r'[()\134]') END_STRING = re.compile(rb'[()\\]')
OCT_STRING = re.compile(r'[0-7]') OCT_STRING = re.compile(rb'[0-7]')
ESC_STRING = { 'b':8, 't':9, 'n':10, 'f':12, 'r':13, '(':40, ')':41, '\\':92 } ESC_STRING = { b'b':8, b't':9, b'n':10, b'f':12, b'r':13, b'(':40, b')':41, b'\\':92 }
class PSBaseParser(object): class PSBaseParser(object):
@ -602,7 +603,7 @@ class PSBaseParser(object):
self.fp.seek(pos) self.fp.seek(pos)
# reset the status for nextline() # reset the status for nextline()
self.bufpos = pos self.bufpos = pos
self.buf = '' self.buf = b''
self.charpos = 0 self.charpos = 0
# reset the status for nexttoken() # reset the status for nexttoken()
self.parse1 = self.parse_main self.parse1 = self.parse_main
@ -624,32 +625,32 @@ class PSBaseParser(object):
if not m: if not m:
return (self.parse_main, len(s)) return (self.parse_main, len(s))
j = m.start(0) j = m.start(0)
c = s[j] c = bytes([s[j]])
self.tokenstart = self.bufpos+j self.tokenstart = self.bufpos+j
if c == '%': if c == b'%':
self.token = '%' self.token = c
return (self.parse_comment, j+1) return (self.parse_comment, j+1)
if c == '/': if c == b'/':
self.token = '' self.token = b''
return (self.parse_literal, j+1) return (self.parse_literal, j+1)
if c in '-+' or c.isdigit(): if c in b'-+' or c.isdigit():
self.token = c self.token = c
return (self.parse_number, j+1) return (self.parse_number, j+1)
if c == '.': if c == b'.':
self.token = c self.token = c
return (self.parse_decimal, j+1) return (self.parse_decimal, j+1)
if c.isalpha(): if c.isalpha():
self.token = c self.token = c
return (self.parse_keyword, j+1) return (self.parse_keyword, j+1)
if c == '(': if c == b'(':
self.token = '' self.token = b''
self.paren = 1 self.paren = 1
return (self.parse_string, j+1) return (self.parse_string, j+1)
if c == '<': if c == b'<':
self.token = '' self.token = b''
return (self.parse_wopen, j+1) return (self.parse_wopen, j+1)
if c == '>': if c == b'>':
self.token = '' self.token = b''
return (self.parse_wclose, j+1) return (self.parse_wclose, j+1)
self.add_token(KWD(c)) self.add_token(KWD(c))
return (self.parse_main, j+1) return (self.parse_main, j+1)
@ -676,20 +677,20 @@ class PSBaseParser(object):
return (self.parse_literal, len(s)) return (self.parse_literal, len(s))
j = m.start(0) j = m.start(0)
self.token += s[i:j] self.token += s[i:j]
c = s[j] c = bytes([s[j]])
if c == '#': if c == b'#':
self.hex = '' self.hex = b''
return (self.parse_literal_hex, j+1) return (self.parse_literal_hex, j+1)
self.add_token(LIT(self.token)) self.add_token(LIT(self.token))
return (self.parse_main, j) return (self.parse_main, j)
def parse_literal_hex(self, s, i): def parse_literal_hex(self, s, i):
c = s[i] c = bytes([s[i]])
if HEX.match(c) and len(self.hex) < 2: if HEX.match(c) and len(self.hex) < 2:
self.hex += c self.hex += c
return (self.parse_literal_hex, i+1) return (self.parse_literal_hex, i+1)
if self.hex: if self.hex:
self.token += chr(int(self.hex, 16)) self.token += bytes([int(self.hex, 16)])
return (self.parse_literal, i) return (self.parse_literal, i)
def parse_number(self, s, i): def parse_number(self, s, i):
@ -699,8 +700,8 @@ class PSBaseParser(object):
return (self.parse_number, len(s)) return (self.parse_number, len(s))
j = m.start(0) j = m.start(0)
self.token += s[i:j] self.token += s[i:j]
c = s[j] c = bytes([s[j]])
if c == '.': if c == b'.':
self.token += c self.token += c
return (self.parse_decimal, j+1) return (self.parse_decimal, j+1)
try: try:
@ -716,7 +717,7 @@ class PSBaseParser(object):
return (self.parse_decimal, len(s)) return (self.parse_decimal, len(s))
j = m.start(0) j = m.start(0)
self.token += s[i:j] self.token += s[i:j]
self.add_token(Decimal(self.token)) self.add_token(Decimal(self.token.decode('utf-8')))
return (self.parse_main, j) return (self.parse_main, j)
def parse_keyword(self, s, i): def parse_keyword(self, s, i):
@ -742,58 +743,59 @@ class PSBaseParser(object):
return (self.parse_string, len(s)) return (self.parse_string, len(s))
j = m.start(0) j = m.start(0)
self.token += s[i:j] self.token += s[i:j]
c = s[j] c = bytes([s[j]])
if c == '\\': if c == b'\\':
self.oct = '' self.oct = ''
return (self.parse_string_1, j+1) return (self.parse_string_1, j+1)
if c == '(': if c == b'(':
self.paren += 1 self.paren += 1
self.token += c self.token += c
return (self.parse_string, j+1) return (self.parse_string, j+1)
if c == ')': if c == b')':
self.paren -= 1 self.paren -= 1
if self.paren: if self.paren:
self.token += c self.token += c
return (self.parse_string, j+1) return (self.parse_string, j+1)
self.add_token(self.token) self.add_token(self.token)
return (self.parse_main, j+1) return (self.parse_main, j+1)
def parse_string_1(self, s, i): def parse_string_1(self, s, i):
c = s[i] c = bytes([s[i]])
if OCT_STRING.match(c) and len(self.oct) < 3: if OCT_STRING.match(c) and len(self.oct) < 3:
self.oct += c self.oct += c
return (self.parse_string_1, i+1) return (self.parse_string_1, i+1)
if self.oct: if self.oct:
self.token += chr(int(self.oct, 8)) self.token += bytes([int(self.oct, 8)])
return (self.parse_string, i) return (self.parse_string, i)
if c in ESC_STRING: if c in ESC_STRING:
self.token += chr(ESC_STRING[c]) self.token += bytes([ESC_STRING[c]])
return (self.parse_string, i+1) return (self.parse_string, i+1)
def parse_wopen(self, s, i): def parse_wopen(self, s, i):
c = s[i] c = bytes([s[i]])
if c.isspace() or HEX.match(c): if c.isspace() or HEX.match(c):
return (self.parse_hexstring, i) return (self.parse_hexstring, i)
if c == '<': if c == b'<':
self.add_token(KEYWORD_DICT_BEGIN) self.add_token(KEYWORD_DICT_BEGIN)
i += 1 i += 1
return (self.parse_main, i) return (self.parse_main, i)
def parse_wclose(self, s, i): def parse_wclose(self, s, i):
c = s[i] c = bytes([s[i]])
if c == '>': if c == b'>':
self.add_token(KEYWORD_DICT_END) self.add_token(KEYWORD_DICT_END)
i += 1 i += 1
return (self.parse_main, i) return (self.parse_main, i)
def parse_hexstring(self, s, i): def parse_hexstring(self, s, i):
m = END_HEX_STRING.search(s, i) m1 = END_HEX_STRING.search(s, i)
if not m: if not m1:
self.token += s[i:] self.token += s[i:]
return (self.parse_hexstring, len(s)) return (self.parse_hexstring, len(s))
j = m.start(0) j = m1.start(0)
self.token += s[i:j] self.token += s[i:j]
token = HEX_PAIR.sub(lambda m: chr(int(m.group(0), 16)), token = HEX_PAIR.sub(lambda m2: bytes([int(m2.group(0), 16)]),
SPC.sub('', self.token)) SPC.sub(b'', self.token))
self.add_token(token) self.add_token(token)
return (self.parse_main, j) return (self.parse_main, j)
@ -808,15 +810,15 @@ class PSBaseParser(object):
''' '''
Fetches a next line that ends either with \\r or \\n. Fetches a next line that ends either with \\r or \\n.
''' '''
linebuf = '' linebuf = b''
linepos = self.bufpos + self.charpos linepos = self.bufpos + self.charpos
eol = False eol = False
while 1: while 1:
self.fillbuf() self.fillbuf()
if eol: if eol:
c = self.buf[self.charpos] c = bytes([self.buf[self.charpos]])
# handle '\r\n' # handle '\r\n'
if c == '\n': if c == b'\n':
linebuf += c linebuf += c
self.charpos += 1 self.charpos += 1
break break
@ -824,7 +826,7 @@ class PSBaseParser(object):
if m: if m:
linebuf += self.buf[self.charpos:m.end(0)] linebuf += self.buf[self.charpos:m.end(0)]
self.charpos = m.end(0) self.charpos = m.end(0)
if linebuf[-1] == '\r': if bytes([linebuf[-1]]) == b'\r':
eol = True eol = True
else: else:
break break
@ -840,7 +842,7 @@ class PSBaseParser(object):
''' '''
self.fp.seek(0, 2) self.fp.seek(0, 2)
pos = self.fp.tell() pos = self.fp.tell()
buf = '' buf = b''
while 0 < pos: while 0 < pos:
prevpos = pos prevpos = pos
pos = max(0, pos-self.BUFSIZ) pos = max(0, pos-self.BUFSIZ)
@ -848,13 +850,13 @@ class PSBaseParser(object):
s = self.fp.read(prevpos-pos) s = self.fp.read(prevpos-pos)
if not s: break if not s: break
while 1: while 1:
n = max(s.rfind('\r'), s.rfind('\n')) n = max(s.rfind(b'\r'), s.rfind(b'\n'))
if n == -1: if n == -1:
buf = s + buf buf = s + buf
break break
yield s[n:]+buf yield s[n:]+buf
s = s[:n] s = s[:n]
buf = '' buf = b''
return return
@ -910,7 +912,7 @@ class PSStackParser(PSBaseParser):
def nextobject(self, direct=False): def nextobject(self, direct=False):
''' '''
Yields a list of objects: keywords, literals, strings, Yields a list of objects: keywords, literals, strings (byte arrays),
numbers, arrays and dictionaries. Arrays and dictionaries numbers, arrays and dictionaries. Arrays and dictionaries
are represented as Python sequence and dictionaries. are represented as Python sequence and dictionaries.
''' '''
@ -920,7 +922,8 @@ class PSStackParser(PSBaseParser):
if (isinstance(token, int) or if (isinstance(token, int) or
isinstance(token, Decimal) or isinstance(token, Decimal) or
isinstance(token, bool) or isinstance(token, bool) or
isinstance(token, str) or isinstance(token, bytearray) or
isinstance(token, bytes) or
isinstance(token, PSLiteral)): isinstance(token, PSLiteral)):
# normal token # normal token
self.push((pos, token)) self.push((pos, token))
@ -963,10 +966,10 @@ class PSStackParser(PSBaseParser):
return obj return obj
LITERAL_CRYPT = PSLiteralTable.intern('Crypt') LITERAL_CRYPT = LIT(b'Crypt')
LITERALS_FLATE_DECODE = (PSLiteralTable.intern('FlateDecode'), PSLiteralTable.intern('Fl')) LITERALS_FLATE_DECODE = (LIT(b'FlateDecode'), LIT(b'Fl'))
LITERALS_LZW_DECODE = (PSLiteralTable.intern('LZWDecode'), PSLiteralTable.intern('LZW')) LITERALS_LZW_DECODE = (LIT(b'LZWDecode'), LIT(b'LZW'))
LITERALS_ASCII85_DECODE = (PSLiteralTable.intern('ASCII85Decode'), PSLiteralTable.intern('A85')) LITERALS_ASCII85_DECODE = (LIT(b'ASCII85Decode'), LIT(b'A85'))
## PDF Objects ## PDF Objects
@ -1020,7 +1023,7 @@ def resolve_all(x):
if isinstance(x, list): if isinstance(x, list):
x = [ resolve_all(v) for v in x ] x = [ resolve_all(v) for v in x ]
elif isinstance(x, dict): elif isinstance(x, dict):
for (k,v) in x.iteritems(): for (k,v) in iter(x.items()):
x[k] = resolve_all(v) x[k] = resolve_all(v)
return x return x
@ -1034,7 +1037,7 @@ def decipher_all(decipher, objid, genno, x):
if isinstance(x, list): if isinstance(x, list):
x = [decf(v) for v in x] x = [decf(v) for v in x]
elif isinstance(x, dict): elif isinstance(x, dict):
x = dict((k, decf(v)) for (k, v) in x.iteritems()) x = dict((k, decf(v)) for (k, v) in iter(x.items()))
return x return x
@ -1065,7 +1068,7 @@ def num_value(x):
def str_value(x): def str_value(x):
x = resolve1(x) x = resolve1(x)
if not isinstance(x, str): if not (isinstance(x, bytearray) or isinstance(x, bytes)):
if STRICT: if STRICT:
raise PDFTypeError('String required: %r' % x) raise PDFTypeError('String required: %r' % x)
return '' return ''
@ -1176,7 +1179,7 @@ class PDFStream(PDFObject):
# will get errors if the document is encrypted. # will get errors if the document is encrypted.
data = zlib.decompress(data) data = zlib.decompress(data)
elif f in LITERALS_LZW_DECODE: elif f in LITERALS_LZW_DECODE:
data = ''.join(LZWDecoder(BytesIO(data)).run()) data = b''.join(LZWDecoder(BytesIO(data)).run())
elif f in LITERALS_ASCII85_DECODE: elif f in LITERALS_ASCII85_DECODE:
data = ascii85decode(data) data = ascii85decode(data)
elif f == LITERAL_CRYPT: elif f == LITERAL_CRYPT:
@ -1204,7 +1207,7 @@ class PDFStream(PDFObject):
pred = data[i] pred = data[i]
ent1 = data[i+1:i+1+columns] ent1 = data[i+1:i+1+columns]
if pred == b'\x02': if pred == b'\x02':
ent1 = ''.join(bytes([(a+b) & 255]) \ ent1 = b''.join(bytes([(a+b) & 255]) \
for (a,b) in zip(ent0,ent1)) for (a,b) in zip(ent0,ent1))
buf += ent1 buf += ent1
ent0 = ent1 ent0 = ent1
@ -1239,11 +1242,11 @@ class PDFEncryptionError(PDFException): pass
class PDFPasswordIncorrect(PDFEncryptionError): pass class PDFPasswordIncorrect(PDFEncryptionError): pass
# some predefined literals and keywords. # some predefined literals and keywords.
LITERAL_OBJSTM = PSLiteralTable.intern('ObjStm') LITERAL_OBJSTM = LIT(b'ObjStm')
LITERAL_XREF = PSLiteralTable.intern('XRef') LITERAL_XREF = LIT(b'XRef')
LITERAL_PAGE = PSLiteralTable.intern('Page') LITERAL_PAGE = LIT(b'Page')
LITERAL_PAGES = PSLiteralTable.intern('Pages') LITERAL_PAGES = LIT(b'Pages')
LITERAL_CATALOG = PSLiteralTable.intern('Catalog') LITERAL_CATALOG = LIT(b'Catalog')
## XRefs ## XRefs
@ -1261,7 +1264,7 @@ class PDFXRef(object):
return '<PDFXRef: objs=%d>' % len(self.offsets) return '<PDFXRef: objs=%d>' % len(self.offsets)
def objids(self): def objids(self):
return self.offsets.iterkeys() return iter(self.offsets.keys())
def load(self, parser): def load(self, parser):
self.offsets = {} self.offsets = {}
@ -1272,10 +1275,10 @@ class PDFXRef(object):
raise PDFNoValidXRef('Unexpected EOF - file corrupted?') raise PDFNoValidXRef('Unexpected EOF - file corrupted?')
if not line: if not line:
raise PDFNoValidXRef('Premature eof: %r' % parser) raise PDFNoValidXRef('Premature eof: %r' % parser)
if line.startswith('trailer'): if line.startswith(b'trailer'):
parser.seek(pos) parser.seek(pos)
break break
f = line.strip().split(' ') f = line.strip().split(b' ')
if len(f) != 2: if len(f) != 2:
raise PDFNoValidXRef('Trailer not found: %r: line=%r' % (parser, line)) raise PDFNoValidXRef('Trailer not found: %r: line=%r' % (parser, line))
try: try:
@ -1287,16 +1290,17 @@ class PDFXRef(object):
(_, line) = parser.nextline() (_, line) = parser.nextline()
except PSEOF: except PSEOF:
raise PDFNoValidXRef('Unexpected EOF - file corrupted?') raise PDFNoValidXRef('Unexpected EOF - file corrupted?')
f = line.strip().split(' ') f = line.strip().split(b' ')
if len(f) != 3: if len(f) != 3:
raise PDFNoValidXRef('Invalid XRef format: %r, line=%r' % (parser, line)) raise PDFNoValidXRef('Invalid XRef format: %r, line=%r' % (parser, line))
(pos, genno, use) = f (pos, genno, use) = f
if use != 'n': continue if use != b'n':
self.offsets[objid] = (int(genno), int(pos)) continue
self.offsets[objid] = (int(genno.decode('utf-8')), int(pos.decode('utf-8')))
self.load_trailer(parser) self.load_trailer(parser)
return return
KEYWORD_TRAILER = PSKeywordTable.intern('trailer') KEYWORD_TRAILER = KWD(b'trailer')
def load_trailer(self, parser): def load_trailer(self, parser):
try: try:
(_,kwd) = parser.nexttoken() (_,kwd) = parser.nexttoken()
@ -1401,7 +1405,8 @@ class PDFDocument(object):
# set_parser(parser) # set_parser(parser)
# Associates the document with an (already initialized) parser object. # Associates the document with an (already initialized) parser object.
def set_parser(self, parser): def set_parser(self, parser):
if self.parser: return if self.parser:
return
self.parser = parser self.parser = parser
# The document is set to be temporarily ready during collecting # The document is set to be temporarily ready during collecting
# all the basic information about the document, e.g. # all the basic information about the document, e.g.
@ -1423,7 +1428,7 @@ class PDFDocument(object):
dict_value(trailer['Encrypt'])) dict_value(trailer['Encrypt']))
# fix for bad files # fix for bad files
except: except:
self.encryption = ('ffffffffffffffffffffffffffffffffffff', self.encryption = (b'ffffffffffffffffffffffffffffffffffff',
dict_value(trailer['Encrypt'])) dict_value(trailer['Encrypt']))
if 'Root' in trailer: if 'Root' in trailer:
self.set_root(dict_value(trailer['Root'])) self.set_root(dict_value(trailer['Root']))
@ -1450,7 +1455,7 @@ class PDFDocument(object):
# Perform the initialization with a given password. # Perform the initialization with a given password.
# This step is mandatory even if there's no password associated # This step is mandatory even if there's no password associated
# with the document. # with the document.
def initialize(self, password=''): def initialize(self, password=b''):
if not self.encryption: if not self.encryption:
self.is_printable = self.is_modifiable = self.is_extractable = True self.is_printable = self.is_modifiable = self.is_extractable = True
self.ready = True self.ready = True
@ -1477,14 +1482,14 @@ class PDFDocument(object):
def genkey_adobe_ps(self, param): def genkey_adobe_ps(self, param):
# nice little offline principal keys dictionary # nice little offline principal keys dictionary
# global static principal key for German Onleihe / Bibliothek Digital # global static principal key for German Onleihe / Bibliothek Digital
principalkeys = { 'bibliothek-digital.de': 'rRwGv2tbpKov1krvv7PO0ws9S436/lArPlfipz5Pqhw='.decode('base64')} principalkeys = { b'bibliothek-digital.de': codecs.decode(b'rRwGv2tbpKov1krvv7PO0ws9S436/lArPlfipz5Pqhw=','base64')}
self.is_printable = self.is_modifiable = self.is_extractable = True self.is_printable = self.is_modifiable = self.is_extractable = True
length = int_value(param.get('Length', 0)) / 8 length = int_value(param.get('Length', 0)) / 8
edcdata = str_value(param.get('EDCData')).decode('base64') edcdata = str_value(param.get('EDCData')).decode('base64')
pdrllic = str_value(param.get('PDRLLic')).decode('base64') pdrllic = str_value(param.get('PDRLLic')).decode('base64')
pdrlpol = str_value(param.get('PDRLPol')).decode('base64') pdrlpol = str_value(param.get('PDRLPol')).decode('base64')
edclist = [] edclist = []
for pair in edcdata.split('\n'): for pair in edcdata.split(b'\n'):
edclist.append(pair) edclist.append(pair)
# principal key request # principal key request
for key in principalkeys: for key in principalkeys:
@ -1493,9 +1498,9 @@ class PDFDocument(object):
else: else:
raise ADEPTError('Cannot find principal key for this pdf') raise ADEPTError('Cannot find principal key for this pdf')
shakey = SHA256(principalkey) shakey = SHA256(principalkey)
ivector = 16 * chr(0) ivector = bytes(16) # 16 zero bytes
plaintext = AES.new(shakey,AES.MODE_CBC,ivector).decrypt(edclist[9].decode('base64')) plaintext = AES.new(shakey,AES.MODE_CBC,ivector).decrypt(edclist[9].decode('base64'))
if plaintext[-16:] != 16 * chr(16): if plaintext[-16:] != bytearray(b'\0x10')*16:
raise ADEPTError('Offlinekey cannot be decrypted, aborting ...') raise ADEPTError('Offlinekey cannot be decrypted, aborting ...')
pdrlpol = AES.new(plaintext[16:32],AES.MODE_CBC,edclist[2].decode('base64')).decrypt(pdrlpol) pdrlpol = AES.new(plaintext[16:32],AES.MODE_CBC,edclist[2].decode('base64')).decrypt(pdrlpol)
if pdrlpol[-1] < 1 or pdrlpol[-1] > 16: if pdrlpol[-1] < 1 or pdrlpol[-1] > 16:
@ -1505,8 +1510,8 @@ class PDFDocument(object):
pdrlpol = pdrlpol[:cutter] pdrlpol = pdrlpol[:cutter]
return plaintext[:16] return plaintext[:16]
PASSWORD_PADDING = '(\xbfN^Nu\x8aAd\x00NV\xff\xfa\x01\x08..' \ PASSWORD_PADDING = b'(\xbfN^Nu\x8aAd\x00NV\xff\xfa\x01\x08..' \
'\x00\xb6\xd0h>\x80/\x0c\xa9\xfedSiz' b'\x00\xb6\xd0h>\x80/\x0c\xa9\xfedSiz'
# experimental aes pw support # experimental aes pw support
def initialize_standard(self, password, docid, param): def initialize_standard(self, password, docid, param):
# copy from a global variable # copy from a global variable
@ -1523,7 +1528,7 @@ class PDFDocument(object):
try: try:
EncMetadata = str_value(param['EncryptMetadata']) EncMetadata = str_value(param['EncryptMetadata'])
except: except:
EncMetadata = 'True' EncMetadata = b'True'
self.is_printable = bool(P & 4) self.is_printable = bool(P & 4)
self.is_modifiable = bool(P & 8) self.is_modifiable = bool(P & 8)
self.is_extractable = bool(P & 16) self.is_extractable = bool(P & 16)
@ -1540,7 +1545,7 @@ class PDFDocument(object):
hash.update(docid[0]) # 5 hash.update(docid[0]) # 5
# aes special handling if metadata isn't encrypted # aes special handling if metadata isn't encrypted
if EncMetadata == ('False' or 'false'): if EncMetadata == ('False' or 'false'):
hash.update('ffffffff'.decode('hex')) hash.update(codecs.decode(b'ffffffff','hex'))
if 5 <= R: if 5 <= R:
# 8 # 8
for _ in range(50): for _ in range(50):
@ -1555,7 +1560,7 @@ class PDFDocument(object):
hash.update(docid[0]) # 3 hash.update(docid[0]) # 3
x = ARC4.new(key).decrypt(hash.digest()[:16]) # 4 x = ARC4.new(key).decrypt(hash.digest()[:16]) # 4
for i in range(1,19+1): for i in range(1,19+1):
k = ''.join(bytes([c ^ i]) for c in key ) k = b''.join(bytes([c ^ i]) for c in key )
x = ARC4.new(k).decrypt(x) x = ARC4.new(k).decrypt(x)
u1 = x+x # 32bytes total u1 = x+x # 32bytes total
if R == 2: if R == 2:
@ -1588,15 +1593,15 @@ class PDFDocument(object):
self.is_printable = self.is_modifiable = self.is_extractable = True self.is_printable = self.is_modifiable = self.is_extractable = True
rsa = RSA(password) rsa = RSA(password)
length = int_value(param.get('Length', 0)) / 8 length = int_value(param.get('Length', 0)) / 8
rights = str_value(param.get('ADEPT_LICENSE')).decode('base64') rights = codecs.decode(param.get('ADEPT_LICENSE'), 'base64')
rights = zlib.decompress(rights, -15) rights = zlib.decompress(rights, -15)
rights = etree.fromstring(rights) rights = etree.fromstring(rights)
expr = './/{http://ns.adobe.com/adept}encryptedKey' expr = './/{http://ns.adobe.com/adept}encryptedKey'
bookkey = ''.join(rights.findtext(expr)).decode('base64') bookkey = codecs.decode(''.join(rights.findtext(expr)).encode('utf-8'),'base64')
bookkey = rsa.decrypt(bookkey) bookkey = rsa.decrypt(bookkey)
if bookkey[0] != '\x02': if bookkey[0] != 2:
raise ADEPTError('error decrypting book session key') raise ADEPTError('error decrypting book session key')
index = bookkey.index('\0') + 1 index = bookkey.index(b'\0') + 1
bookkey = bookkey[index:] bookkey = bookkey[index:]
ebx_V = int_value(param.get('V', 4)) ebx_V = int_value(param.get('V', 4))
ebx_type = int_value(param.get('EBX_ENCRYPTIONTYPE', 6)) ebx_type = int_value(param.get('EBX_ENCRYPTIONTYPE', 6))
@ -1643,7 +1648,7 @@ class PDFDocument(object):
objid = struct.pack('<L', objid ^ 0x3569ac) objid = struct.pack('<L', objid ^ 0x3569ac)
genno = struct.pack('<L', genno ^ 0xca96) genno = struct.pack('<L', genno ^ 0xca96)
key = self.decrypt_key key = self.decrypt_key
key += objid[0] + genno[0] + objid[1] + genno[1] + objid[2] + 'sAlT' key += objid[0] + genno[0] + objid[1] + genno[1] + objid[2] + b'sAlT'
hash = hashlib.md5(key) hash = hashlib.md5(key)
key = hash.digest()[:min(len(self.decrypt_key) + 5, 16)] key = hash.digest()[:min(len(self.decrypt_key) + 5, 16)]
return key return key
@ -1652,7 +1657,7 @@ class PDFDocument(object):
def genkey_v4(self, objid, genno): def genkey_v4(self, objid, genno):
objid = struct.pack('<L', objid)[:3] objid = struct.pack('<L', objid)[:3]
genno = struct.pack('<L', genno)[:2] genno = struct.pack('<L', genno)[:2]
key = self.decrypt_key + objid + genno + 'sAlT' key = self.decrypt_key + objid + genno + b'sAlT'
hash = hashlib.md5(key) hash = hashlib.md5(key)
key = hash.digest()[:min(len(self.decrypt_key) + 5, 16)] key = hash.digest()[:min(len(self.decrypt_key) + 5, 16)]
return key return key
@ -1684,7 +1689,7 @@ class PDFDocument(object):
return ARC4.new(key).decrypt(data) return ARC4.new(key).decrypt(data)
KEYWORD_OBJ = PSKeywordTable.intern('obj') KEYWORD_OBJ = KWD(b'obj')
def getobj(self, objid): def getobj(self, objid):
if not self.ready: if not self.ready:
@ -1791,11 +1796,11 @@ class PDFParser(PSStackParser):
def __repr__(self): def __repr__(self):
return '<PDFParser>' return '<PDFParser>'
KEYWORD_R = PSKeywordTable.intern('R') KEYWORD_R = KWD(b'R')
KEYWORD_ENDOBJ = PSKeywordTable.intern('endobj') KEYWORD_ENDOBJ = KWD(b'endobj')
KEYWORD_STREAM = PSKeywordTable.intern('stream') KEYWORD_STREAM = KWD(b'stream')
KEYWORD_XREF = PSKeywordTable.intern('xref') KEYWORD_XREF = KWD(b'xref')
KEYWORD_STARTXREF = PSKeywordTable.intern('startxref') KEYWORD_STARTXREF = KWD(b'startxref')
def do_keyword(self, pos, token): def do_keyword(self, pos, token):
if token in (self.KEYWORD_XREF, self.KEYWORD_STARTXREF): if token in (self.KEYWORD_XREF, self.KEYWORD_STARTXREF):
self.add_results(*self.pop(1)) self.add_results(*self.pop(1))
@ -1843,8 +1848,8 @@ class PDFParser(PSStackParser):
if STRICT: if STRICT:
raise PDFSyntaxError('Unexpected EOF') raise PDFSyntaxError('Unexpected EOF')
break break
if 'endstream' in line: if b'endstream' in line:
i = line.index('endstream') i = line.index(b'endstream')
objlen += i objlen += i
data += line[:i] data += line[:i]
break break
@ -1864,7 +1869,7 @@ class PDFParser(PSStackParser):
prev = None prev = None
for line in self.revreadlines(): for line in self.revreadlines():
line = line.strip() line = line.strip()
if line == 'startxref': break if line == b'startxref': break
if line: if line:
prev = line prev = line
else: else:
@ -1916,7 +1921,7 @@ class PDFParser(PSStackParser):
except PDFNoValidXRef: except PDFNoValidXRef:
# fallback # fallback
self.seek(0) self.seek(0)
pat = re.compile(r'^(\d+)\s+(\d+)\s+obj\b') pat = re.compile(rb'^(\d+)\s+(\d+)\s+obj\b')
offsets = {} offsets = {}
xref = PDFXRef() xref = PDFXRef()
while 1: while 1:
@ -1924,7 +1929,7 @@ class PDFParser(PSStackParser):
(pos, line) = self.nextline() (pos, line) = self.nextline()
except PSEOF: except PSEOF:
break break
if line.startswith('trailer'): if line.startswith(b'trailer'):
trailerpos = pos # remember last trailer trailerpos = pos # remember last trailer
m = pat.match(line) m = pat.match(line)
if not m: continue if not m: continue
@ -1951,7 +1956,7 @@ class PDFObjStrmParser(PDFParser):
self.add_results(*self.popall()) self.add_results(*self.popall())
return return
KEYWORD_R = KWD('R') KEYWORD_R = KWD(b'R')
def do_keyword(self, pos, token): def do_keyword(self, pos, token):
if token is self.KEYWORD_R: if token is self.KEYWORD_R:
# reference to indirect object # reference to indirect object
@ -1994,7 +1999,7 @@ class PDFSerializer(object):
def dump(self, outf): def dump(self, outf):
self.outf = outf self.outf = outf
self.write(self.version) self.write(self.version)
self.write('\n%\xe2\xe3\xcf\xd3\n') self.write(b'\n%\xe2\xe3\xcf\xd3\n')
doc = self.doc doc = self.doc
objids = self.objids objids = self.objids
xrefs = {} xrefs = {}
@ -2016,18 +2021,18 @@ class PDFSerializer(object):
startxref = self.tell() startxref = self.tell()
if not gen_xref_stm: if not gen_xref_stm:
self.write('xref\n') self.write(b'xref\n')
self.write('0 %d\n' % (maxobj + 1,)) self.write(b'0 %d\n' % (maxobj + 1,))
for objid in range(0, maxobj + 1): for objid in range(0, maxobj + 1):
if objid in xrefs: if objid in xrefs:
# force the genno to be 0 # force the genno to be 0
self.write("%010d 00000 n \n" % xrefs[objid][0]) self.write(b"%010d 00000 n \n" % xrefs[objid][0])
else: else:
self.write("%010d %05d f \n" % (0, 65535)) self.write(b"%010d %05d f \n" % (0, 65535))
self.write('trailer\n') self.write(b'trailer\n')
self.serialize_object(trailer) self.serialize_object(trailer)
self.write('\nstartxref\n%d\n%%%%EOF' % startxref) self.write(b'\nstartxref\n%d\n%%%%EOF' % startxref)
else: # Generate crossref stream. else: # Generate crossref stream.
@ -2076,7 +2081,7 @@ class PDFSerializer(object):
data.append(struct.pack('>L', f2)[-fl2:]) data.append(struct.pack('>L', f2)[-fl2:])
data.append(struct.pack('>L', f3)[-fl3:]) data.append(struct.pack('>L', f3)[-fl3:])
index.extend((first, prev - first + 1)) index.extend((first, prev - first + 1))
data = zlib.compress(''.join(data)) data = zlib.compress(b''.join(data))
dic = {'Type': LITERAL_XREF, 'Size': prev + 1, 'Index': index, dic = {'Type': LITERAL_XREF, 'Size': prev + 1, 'Index': index,
'W': [1, fl2, fl3], 'Length': len(data), 'W': [1, fl2, fl3], 'Length': len(data),
'Filter': LITERALS_FLATE_DECODE[0], 'Filter': LITERALS_FLATE_DECODE[0],
@ -2085,7 +2090,7 @@ class PDFSerializer(object):
dic['Info'] = trailer['Info'] dic['Info'] = trailer['Info']
xrefstm = PDFStream(dic, data) xrefstm = PDFStream(dic, data)
self.serialize_indirect(maxobj, xrefstm) self.serialize_indirect(maxobj, xrefstm)
self.write('startxref\n%d\n%%%%EOF' % startxref) self.write(b'startxref\n%d\n%%%%EOF' % startxref)
def write(self, data): def write(self, data):
self.outf.write(data) self.outf.write(data)
self.last = data[-1:] self.last = data[-1:]
@ -2094,13 +2099,10 @@ class PDFSerializer(object):
return self.outf.tell() return self.outf.tell()
def escape_string(self, string): def escape_string(self, string):
string = string.replace('\\', '\\\\') string = string.replace(b'\\', b'\\\\')
string = string.replace('\n', r'\n') string = string.replace(b'\n', rb'\n')
string = string.replace('(', r'\(') string = string.replace(b'(', rb'\(')
string = string.replace(')', r'\)') string = string.replace(b')', rb'\)')
# get rid of ciando id
regularexp = re.compile(r'http://www.ciando.com/index.cfm/intRefererID/\d{5}')
if regularexp.match(string): return ('http://www.ciando.com')
return string return string
def serialize_object(self, obj): def serialize_object(self, obj):
@ -2111,34 +2113,38 @@ class PDFSerializer(object):
obj['Subtype'] = obj['Type'] obj['Subtype'] = obj['Type']
del obj['Type'] del obj['Type']
# end - hope this doesn't have bad effects # end - hope this doesn't have bad effects
self.write('<<') self.write(b'<<')
for key, val in obj.items(): for key, val in obj.items():
self.write('/%s' % key) self.write(b'/%s' % key.encode('utf-8'))
self.serialize_object(val) self.serialize_object(val)
self.write('>>') self.write(b'>>')
elif isinstance(obj, list): elif isinstance(obj, list):
self.write('[') self.write(b'[')
for val in obj: for val in obj:
self.serialize_object(val) self.serialize_object(val)
self.write(']') self.write(b']')
elif isinstance(obj, bytearray):
self.write(b'(%s)' % self.escape_string(obj))
elif isinstance(obj, bytes):
self.write(b'(%s)' % self.escape_string(obj))
elif isinstance(obj, str): elif isinstance(obj, str):
self.write('(%s)' % self.escape_string(obj)) self.write(b'(%s)' % self.escape_string(obj.encode('utf-8')))
elif isinstance(obj, bool): elif isinstance(obj, bool):
if self.last.isalnum(): if self.last.isalnum():
self.write(' ') self.write(b' ')
self.write(str(obj).lower()) self.write(str(obj).lower().encode('utf-8'))
elif isinstance(obj, int): elif isinstance(obj, int):
if self.last.isalnum(): if self.last.isalnum():
self.write(' ') self.write(b' ')
self.write(str(obj)) self.write(str(obj).encode('utf-8'))
elif isinstance(obj, Decimal): elif isinstance(obj, Decimal):
if self.last.isalnum(): if self.last.isalnum():
self.write(' ') self.write(b' ')
self.write(str(obj)) self.write(str(obj).encode('utf-8'))
elif isinstance(obj, PDFObjRef): elif isinstance(obj, PDFObjRef):
if self.last.isalnum(): if self.last.isalnum():
self.write(' ') self.write(b' ')
self.write('%d %d R' % (obj.objid, 0)) self.write(b'%d %d R' % (obj.objid, 0))
elif isinstance(obj, PDFStream): elif isinstance(obj, PDFStream):
### If we don't generate cross ref streams the object streams ### If we don't generate cross ref streams the object streams
### are no longer useful, as we have extracted all objects from ### are no longer useful, as we have extracted all objects from
@ -2148,21 +2154,21 @@ class PDFSerializer(object):
else: else:
data = obj.get_decdata() data = obj.get_decdata()
self.serialize_object(obj.dic) self.serialize_object(obj.dic)
self.write('stream\n') self.write(b'stream\n')
self.write(data) self.write(data)
self.write('\nendstream') self.write(b'\nendstream')
else: else:
data = str(obj) data = str(obj).encode('utf-8')
if data[0].isalnum() and self.last.isalnum(): if bytes([data[0]]).isalnum() and self.last.isalnum():
self.write(' ') self.write(b' ')
self.write(data) self.write(data)
def serialize_indirect(self, objid, obj): def serialize_indirect(self, objid, obj):
self.write('%d 0 obj' % (objid,)) self.write(b'%d 0 obj' % (objid,))
self.serialize_object(obj) self.serialize_object(obj)
if self.last.isalnum(): if self.last.isalnum():
self.write('\n') self.write(b'\n')
self.write('endobj\n') self.write(b'endobj\n')
@ -2182,7 +2188,7 @@ def decryptBook(userkey, inpath, outpath):
try: try:
serializer.dump(outf) serializer.dump(outf)
except Exception as e: except Exception as e:
print("error writing pdf: {0}".format(e.args[0])) print("error writing pdf: {0}".format(e))
return 2 return 2
return 0 return 0