# 0.01 - Initial version
# 0.02 - Support more eReader files. Support bold text and links. Fix PML decoder parsing bug.
# 0.03 - Fix incorrect variable usage at one place.
-# 0.03b - Add support for type 259
-
+# 0.05 - Support for more things in type 272
import struct, binascii, zlib, os, sha, sys, os.path
+DEBUG=0
+
ECB = 0
CBC = 1
class Des:
def __init__(self, filename, ident):
self.contents = file(filename, 'rb').read()
self.header = self.contents[0:72]
+ if DEBUG:
+ file("header.dat", 'wb').write(self.header)
+
self.num_sections, = struct.unpack('>H', self.contents[76:78])
+ if DEBUG:
+ print "number of sections: %d" % self.num_sections
if self.header[0x3C:0x3C+8] != ident:
raise ValueError('Invalid file format')
self.sections = []
for i in xrange(self.num_sections):
offset, a1,a2,a3,a4 = struct.unpack('>LBBBB', self.contents[78+i*8:78+i*8+8])
flags, val = a1, a2<<16|a3<<8|a4
+ if DEBUG:
+ print "section %d offset %d" % ( i, offset )
self.sections.append( (offset, flags, val) )
def loadSection(self, section):
if section + 1 == self.num_sections:
return b ^ ((b ^ (b<<1) ^ (b<<2) ^ (b<<3) ^ (b<<4) ^ (b<<5) ^ (b<<6) ^ (b<<7) ^ 0x80) & 0x80)
return "".join([chr(fixByte(ord(a))) for a in key])
+def deXOR(text, sp, table):
+ r=''
+ j = sp
+ for i in xrange(len(text)):
+ r += chr(ord(table[j]) ^ ord(text[i]))
+ j = j + 1
+ if j == len(table):
+ j = 0
+ return r
+
+
class EreaderProcessor:
def __init__(self, section_reader, username, creditcard):
self.section_reader = section_reader
data = section_reader(0)
+ self.data0 = data
+ if DEBUG:
+ file("data0.dat", 'wb').write(self.data0)
version, = struct.unpack('>H', data[0:2])
- if version != 272 and version != 260 and version != 259:
+ if version != 272 and version != 260:
raise ValueError('incorrect eReader version %d (error 1)' % version)
data = section_reader(1)
self.data = data
des = Des(fixKey(data[0:8]))
+ # first key is used on last 8 bytes of data to get cookie_shuf and cookie_size
+ self.first_key = data[0:8]
+ self.end_key = des.decrypt(data[-8:])
cookie_shuf, cookie_size = struct.unpack('>LL', des.decrypt(data[-8:]))
if cookie_shuf < 3 or cookie_shuf > 0x14 or cookie_size < 0xf0 or cookie_size > 0x200:
raise ValueError('incorrect eReader version (error 2)')
+ # first key is also used to decrypt all remaining bytes in data into their shuffled version
input = des.decrypt(data[-cookie_size:])
+
+ # now unshuffle it
def unshuff(data, shuf):
r = [''] * len(data)
j = 0
assert len("".join(r)) == len(data)
return "".join(r)
r = unshuff(input[0:-8], cookie_shuf)
+
def fixUsername(s):
r = ''
for c in s.lower():
if (c >= 'a' and c <= 'z' or c >= '0' and c <= '9'):
r += c
return r
+
user_key = struct.pack('>LL', binascii.crc32(fixUsername(username)) & 0xffffffff, binascii.crc32(creditcard[-8:])& 0xffffffff)
+ # second key is made of of user private info i.e. name and crediticard info
+ self.user_key = user_key
+
+ if DEBUG:
+ file("mainrecord.dat", 'wb').write(r)
+
+ # the unshuffled data is examined to find record information
drm_sub_version = struct.unpack('>H', r[0:2])[0]
self.num_text_pages = struct.unpack('>H', r[2:4])[0] - 1
self.num_image_pages = struct.unpack('>H', r[26:26+2])[0]
self.first_image_page = struct.unpack('>H', r[24:24+2])[0]
+
+ if version == 272:
+ self.num_chapter_pages = struct.unpack('>H', r[22:22+2])[0]
+ self.first_chapter_page = struct.unpack('>H', r[20:20+2])[0]
+
+ self.num_link_pages = struct.unpack('>H', r[30:30+2])[0]
+ self.first_link_page = struct.unpack('>H', r[28:28+2])[0]
+
+ self.num_bkinfo_pages = struct.unpack('>H', r[34:34+2])[0]
+ self.first_bkinfo_page = struct.unpack('>H', r[32:32+2])[0]
+
+ self.num_fnote_pages = struct.unpack('>H', r[46:46+2])[0]
+ self.first_fnote_page = struct.unpack('>H', r[44:44+2])[0]
+
+ self.num_xtextsize_pages = struct.unpack('>H', r[54:54+2])[0]
+ self.first_xtextsize_page = struct.unpack('>H', r[52:52+2])[0]
+
+ self.num_sidebar_pages = struct.unpack('>H', r[38:38+2])[0]
+ self.first_sidebar_page = struct.unpack('>H', r[36:36+2])[0]
+
+ # **before** data record 1 was decrypted and unshuffled, it contained data
+ # to create an XOR table and which is used to fix footnote record 0, link records, chapter records, etc
+ self.xortable_offset = struct.unpack('>H', r[40:40+2])[0]
+ self.xortable_size = struct.unpack('>H', r[42:42+2])[0]
+ self.xortable = self.data[self.xortable_offset:self.xortable_offset + self.xortable_size]
+ else:
+ self.num_chapter_pages = 0
+ self.num_link_pages = 0
+ self.num_bkinfo_pages = 0
+ self.num_fnote_pages = 0
+ self.num_xtextsize_pages = 0
+ self.num_sidebar_pages = 0
+ self.first_chapter_pages = -1
+ self.first_link_pages = -1
+ self.first_bkinfo_pages = -1
+ self.first_fnote_pages = -1
+ self.first_xtextsize_pages = -1
+ self.first_sidebar_pages = -1
+
+ if DEBUG:
+ print "num_text_pages: %d" % self.num_text_pages
+ print "first_text_page: %d" % 1
+
+ print "num_chapter_pages: %d" % self.num_chapter_pages
+ print "first_chapter_page: %d" % self.first_chapter_page
+
+ print "num_image_pages: %d" % self.num_image_pages
+ print "first_image_page: %d" % self.first_image_page
+
+ print "num_fnote_pages: %d" % self.num_fnote_pages
+ print "first_fnote_page: %d" % self.first_fnote_page
+
+ print "num_link_pages: %d" % self.num_link_pages
+ print "first_link_page: %d" % self.first_link_page
+
+ print "num_bkinfo_pages: %d" % self.num_bkinfo_pages
+ print "first_bkinfo_page: %d" % self.first_bkinfo_page
+
+ print "num_xtextsize_pages: %d" % self.num_xtextsize_pages
+ print "first_xtextsize_page: %d" % self.first_xtextsize_page
+
+ print "num_sidebar_pages: %d" % self.num_sidebar_pages
+ print "first_sidebar_page: %d" % self.first_sidebar_page
+
self.flags = struct.unpack('>L', r[4:8])[0]
reqd_flags = (1<<9) | (1<<7) | (1<<10)
if (self.flags & reqd_flags) != reqd_flags:
print "Flags: 0x%X" % self.flags
raise ValueError('incompatible eReader file')
+ # the user_key is used to unpack the encrypted key which is stored in the unshuffled data
des = Des(fixKey(user_key))
- if version == 259:
- if drm_sub_version != 7:
- raise ValueError('incorrect eReader version %d (error 3)' % drm_sub_version)
- encrypted_key_sha = r[44:44+20]
- encrypted_key = r[64:64+8]
- elif version == 260:
+
+ if version == 260:
if drm_sub_version != 13:
raise ValueError('incorrect eReader version %d (error 3)' % drm_sub_version)
encrypted_key = r[44:44+8]
elif version == 272:
encrypted_key = r[172:172+8]
encrypted_key_sha = r[56:56+20]
+
+ # the decrypted version of encrypted_key is the content_key
self.content_key = des.decrypt(encrypted_key)
+
if sha.new(self.content_key).digest() != encrypted_key_sha:
raise ValueError('Incorrect Name and/or Credit Card')
+
+
def getNumImages(self):
return self.num_image_pages
+
def getImage(self, i):
sect = self.section_reader(self.first_image_page + i)
name = sect[4:4+32].strip('\0')
data = sect[62:]
return sanitizeFileName(name), data
+
+ def getChapterNamePMLOffsetData(self):
+ cv = ''
+ if self.num_chapter_pages > 0:
+ # now dump chapter offsets and chapter names
+ # see mobile read wiki for details
+ for i in xrange(self.num_chapter_pages):
+ chaps = self.section_reader(self.first_chapter_page + i)
+ j = i % self.xortable_size
+ cv += deXOR(chaps, j, self.xortable)
+ return cv
+
+ def getLinkNamePMLOffsetData(self):
+ lv = ''
+ if self.num_link_pages > 0:
+ # now dump link offset and link names
+ # see mobileread wiki for details
+ for i in xrange(self.num_link_pages):
+ links = self.section_reader(self.first_link_page + i)
+ j = i % self.xortable_size
+ lv += deXOR(links, j, self.xortable)
+ return lv
+
+
+ def getBookInfoData(self):
+ bi = ''
+ if self.num_bkinfo_pages > 0:
+ # now dump book information
+ # see mobileread wiki for details
+ for i in xrange(self.num_bkinfo_pages):
+ binfo = self.section_reader(self.first_bkinfo_page + i)
+ j = i % self.xortable_size
+ bi += deXOR(binfo, j, self.xortable)
+ return bi
+
+
+ def getExpandedTextSizesData(self):
+ ts = ''
+ if self.num_xtextsize_pages > 0:
+ # now dump table of expanded sizes for each text page
+ # (two bytes for each text page - see mobileread wiki for details)
+ for i in xrange(self.num_xtextsize_pages):
+ tsize = self.section_reader(self.first_xtextsize_page + i)
+ j = i % self.xortable_size
+ ts += deXOR(tsize, j, self.xortable)
+ return ts
+
def getText(self):
+ # uses the content_key and zlib to decrypt and then inflate text sections
des = Des(fixKey(self.content_key))
r = ''
for i in xrange(self.num_text_pages):
r += zlib.decompress(des.decrypt(self.section_reader(1 + i)))
+
+ # now handle footnotes pages
+ if self.num_fnote_pages > 0:
+ # the first record of the footnote section must pass through the Xor Table to make it useful
+ sect = self.section_reader(self.first_fnote_page)
+ fnote_ids = deXOR(sect, 0, self.xortable)
+ p = 0
+ # the remaining records of the footnote sections need to be decoded with the content_key and zlib inflated
+ des = Des(fixKey(self.content_key))
+ r += '\\w="100%"'
+ r += 'Footnotes\p'
+ for i in xrange(1,self.num_fnote_pages):
+ id_len = ord(fnote_ids[2])
+ id = fnote_ids[3:3+id_len]
+ fmarker='\Q="%s"' % id
+ r+=fmarker
+ r += zlib.decompress(des.decrypt(self.section_reader(self.first_fnote_page + i)))
+ r += '\n'
+ fnote_ids = fnote_ids[id_len+4:]
+
+ # TO-DO - handle sidebar pages similar to footnotes pages
+
return r
+
class PmlConverter:
def __init__(self, s):
self.s = s
return None, None, None
def linkPrinter(link):
return '<a href="%s">' % link
+ def ilinkPrinter(link):
+ return '<a href="#%s">' % link
html_tags = {
'c' : ('<p align="center">', '</p>'),
'X4' : ('<h5>', '</h5>'),
'l' : ('<font size="+2">', '</font>'),
'q' : (linkPrinter, '</a>'),
+ 'Fn' : (ilinkPrinter, '</a>'),
}
html_one_tags = {
'p' : '<br><br>'
if cmd == 'm':
final += '<img src="%s">' % attr
if cmd == 'Q':
- final += '<a name="%s"> </a>' % attr
+ final += '<a name="%s" id="%s"> </a>' % (attr, attr)
if cmd == 'a':
final += self.pml_chars.get(attr, '&#%d;' % attr)
if cmd == 'U':
name, contents = er.getImage(i)
file(os.path.join(outdir, name), 'wb').write(contents)
- pml = PmlConverter(er.getText())
+ rawpml = er.getText()
+ file(os.path.join(outdir, 'book.pml'),'wb').write(rawpml)
+
+ pml = PmlConverter(rawpml)
file(os.path.join(outdir, 'book.html'),'wb').write(pml.process())
-print "eReader2Html v0.03b, derived from:"
-print "\teReader2Html v0.03. Copyright (c) 2008 The Dark Reverser"
-print "with enhancement by DeBockle"
+ ts = er.getExpandedTextSizesData()
+ file(os.path.join(outdir, 'xtextsizes.dat'), 'wb').write(ts)
+
+ cv = er.getChapterNamePMLOffsetData()
+ file(os.path.join(outdir, 'chapters.dat'), 'wb').write(cv)
+
+ bi = er.getBookInfoData()
+ file(os.path.join(outdir, 'bookinfo.dat'), 'wb').write(bi)
+
+ lv = er.getLinkNamePMLOffsetData()
+ file(os.path.join(outdir, 'links.dat'), 'wb').write(lv)
+
+
+print "eReader2Html v0.05. Copyright (c) 2008 The Dark Reverser"
if len(sys.argv)!=5:
print "Converts eReader books to HTML"
print "Usage:"
else:
infile, outdir, name, cc = sys.argv[1], sys.argv[2], sys.argv[3], sys.argv[4]
try:
- print "Processing...",
+ print "Processing..."
convertEreaderToHtml(infile, name, cc, outdir)
print "done"
except ValueError, e:
projects / DeDRM.git / commitdiff