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Apprentice

a guest Nov 5th, 2009 289 Never
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  1. #!/usr/bin/env python
  2. # -*- coding: ascii -*-
  3. # vim:ts=4:sw=4:softtabstop=4:smarttab:expandtab
  4. #
  5. # This is a python script. You need a Python interpreter to run it.
  6. # For example, ActiveState Python, which exists for windows.
  7. # Changelog
  8. #  0.01 - Initial version
  9. #  0.02 - Support more eReader files. Support bold text and links. Fix PML decoder parsing bug.
  10. #  0.03 - Fix incorrect variable usage at one place.
  11. #  0.03b - enhancement by DeBockle (version 259 support)
  12. # Custom version 0.03 - no change to eReader support, only usability changes
  13. #   - start of pep-8 indentation (spaces not tab), fix trailing blanks
  14. #   - version variable, only one place to change
  15. #   - added main routine, now callable as a library/module,
  16. #     means tools can add optional support for ereader2html
  17. #   - outdir is no longer a mandatory parameter (defaults based on input name if missing)
  18. #   - time taken output to stdout
  19. #   - Psyco support - reduces runtime by a factor of (over) 3!
  20. #     E.g. (~600Kb file) 90 secs down to 24 secs
  21. #       - newstyle classes
  22. #       - changed map call to list comprehension
  23. #         may not work with python 2.3
  24. #         without Psyco this reduces runtime to 90%
  25. #         E.g. 90 secs down to 77 secs
  26. #         Psyco with map calls takes longer, do not run with map in Psyco JIT!
  27. #       - izip calls used instead of zip (if available), further reduction
  28. #         in run time (factor of 4.5).
  29. #         E.g. (~600Kb file) 90 secs down to 20 secs
  30. #   - Python 2.6+ support, avoid DeprecationWarning with sha/sha1
  31. #  0.04 - Footnote support, PML output, correct charset in html, support more PML tags
  32. #   - Feature change, dump out PML file
  33. #   - Added supprt for footnote tags. NOTE footnote ids appear to be bad (not usable)
  34. #       in some pdb files :-( due to the same id being used multiple times
  35. #   - Added correct charset encoding (pml is based on cp1252)
  36. #   - Added logging support.
  37. #  
  38. #   TODO run this through a profiler - speed increases so far was from
  39. #   applying "quick known fixes", added (commented out) cprofiler call
  40. #  0.05 - Support for more things in type 272
  41. #  0.06 - Merge of 0.04 and 0.05. Improved HTML output
  42. #         Placed images in subfolder, so that it's possible to just
  43. #         drop the book.pml file onto DropBook to make an unencrypted
  44. #         copy of the eReader file.
  45. #         Using that with Calibre works a lot better than the HTML
  46. #         conversion in this code.
  47.  
  48. __version__='0.06'
  49. DEBUG = 0
  50.  
  51.  
  52. # Import Psyco if available
  53. try:
  54.     # Dumb speed hack 1
  55.     # http://psyco.sourceforge.net
  56.     import psyco
  57.     psyco.full()
  58.     pass
  59. except ImportError:
  60.     pass
  61. try:
  62.     # Dumb speed hack 2
  63.     # All map() calls converted to list comprehension (some use zip)
  64.     # override zip with izip - saves memory and in rough testing
  65.     # appears to be faster zip() is only used in the converted map() calls
  66.     from itertools import izip as zip
  67. except ImportError:
  68.     pass
  69.  
  70. import struct, binascii, zlib, os, sys, os.path, urllib
  71. try:
  72.     from hashlib import sha1
  73. except ImportError:
  74.     # older Python release
  75.     import sha
  76.     sha1 = lambda s: sha.new(s)
  77. import cgi
  78. import logging
  79.  
  80. logging.basicConfig()
  81. #logging.basicConfig(level=logging.DEBUG)
  82.  
  83. write_pml=False
  84.  
  85. ECB = 0
  86. CBC = 1
  87. class Des(object):
  88.     __pc1 = [56, 48, 40, 32, 24, 16,  8,  0, 57, 49, 41, 33, 25, 17,
  89.           9,  1, 58, 50, 42, 34, 26, 18, 10,  2, 59, 51, 43, 35,
  90.          62, 54, 46, 38, 30, 22, 14,  6, 61, 53, 45, 37, 29, 21,
  91.          13,  5, 60, 52, 44, 36, 28, 20, 12,  4, 27, 19, 11,  3]
  92.     __left_rotations = [1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1]
  93.     __pc2 = [13, 16, 10, 23,  0,  4,2, 27, 14,  5, 20,  9,
  94.         22, 18, 11,  3, 25,  7, 15,  6, 26, 19, 12,  1,
  95.         40, 51, 30, 36, 46, 54, 29, 39, 50, 44, 32, 47,
  96.         43, 48, 38, 55, 33, 52, 45, 41, 49, 35, 28, 31]
  97.     __ip = [57, 49, 41, 33, 25, 17,  9,  1, 59, 51, 43, 35, 27, 19, 11, 3,
  98.         61, 53, 45, 37, 29, 21, 13,  5, 63, 55, 47, 39, 31, 23, 15, 7,
  99.         56, 48, 40, 32, 24, 16,  8,  0, 58, 50, 42, 34, 26, 18, 10, 2,
  100.         60, 52, 44, 36, 28, 20, 12,  4, 62, 54, 46, 38, 30, 22, 14, 6]
  101.     __expansion_table = [31,  0,  1,  2,  3,  4, 3,  4,  5,  6,  7,  8,
  102.          7,  8,  9, 10, 11, 12,11, 12, 13, 14, 15, 16,
  103.         15, 16, 17, 18, 19, 20,19, 20, 21, 22, 23, 24,
  104.         23, 24, 25, 26, 27, 28,27, 28, 29, 30, 31,  0]
  105.     __sbox = [[14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7,
  106.          0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8,
  107.          4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0,
  108.          15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13],
  109.         [15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10,
  110.          3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5,
  111.          0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15,
  112.          13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9],
  113.         [10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8,
  114.          13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1,
  115.          13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7,
  116.          1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12],
  117.         [7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15,
  118.          13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9,
  119.          10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4,
  120.          3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14],
  121.         [2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9,
  122.          14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6,
  123.          4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14,
  124.          11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3],
  125.         [12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11,
  126.          10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8,
  127.          9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6,
  128.          4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13],
  129.         [4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1,
  130.          13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6,
  131.          1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2,
  132.          6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12],
  133.         [13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7,
  134.          1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2,
  135.          7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8,
  136.          2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11],]
  137.     __p = [15, 6, 19, 20, 28, 11,27, 16, 0, 14, 22, 25,
  138.         4, 17, 30, 9, 1, 7,23,13, 31, 26, 2, 8,18, 12, 29, 5, 21, 10,3, 24]
  139.     __fp = [39,  7, 47, 15, 55, 23, 63, 31,38,  6, 46, 14, 54, 22, 62, 30,
  140.         37,  5, 45, 13, 53, 21, 61, 29,36,  4, 44, 12, 52, 20, 60, 28,
  141.         35,  3, 43, 11, 51, 19, 59, 27,34,  2, 42, 10, 50, 18, 58, 26,
  142.         33,  1, 41,  9, 49, 17, 57, 25,32,  0, 40,  8, 48, 16, 56, 24]
  143.     # Type of crypting being done
  144.     ENCRYPT = 0x00
  145.     DECRYPT = 0x01
  146.     def __init__(self, key, mode=ECB, IV=None):
  147.         if len(key) != 8:
  148.             raise ValueError("Invalid DES key size. Key must be exactly 8 bytes long.")
  149.         self.block_size = 8
  150.         self.key_size = 8
  151.         self.__padding = ''
  152.         self.setMode(mode)
  153.         if IV:
  154.             self.setIV(IV)
  155.         self.L = []
  156.         self.R = []
  157.         self.Kn = [ [0] * 48 ] * 16    # 16 48-bit keys (K1 - K16)
  158.         self.final = []
  159.         self.setKey(key)
  160.     def getKey(self):
  161.         return self.__key
  162.     def setKey(self, key):
  163.         self.__key = key
  164.         self.__create_sub_keys()
  165.     def getMode(self):
  166.         return self.__mode
  167.     def setMode(self, mode):
  168.         self.__mode = mode
  169.     def getIV(self):
  170.         return self.__iv
  171.     def setIV(self, IV):
  172.         if not IV or len(IV) != self.block_size:
  173.             raise ValueError("Invalid Initial Value (IV), must be a multiple of " + str(self.block_size) + " bytes")
  174.         self.__iv = IV
  175.     def getPadding(self):
  176.         return self.__padding
  177.     def __String_to_BitList(self, data):
  178.         l = len(data) * 8
  179.         result = [0] * l
  180.         pos = 0
  181.         for c in data:
  182.             i = 7
  183.             ch = ord(c)
  184.             while i >= 0:
  185.                 if ch & (1 << i) != 0:
  186.                     result[pos] = 1
  187.                 else:
  188.                     result[pos] = 0
  189.                 pos += 1
  190.                 i -= 1
  191.         return result
  192.     def __BitList_to_String(self, data):
  193.         result = ''
  194.         pos = 0
  195.         c = 0
  196.         while pos < len(data):
  197.             c += data[pos] << (7 - (pos % 8))
  198.             if (pos % 8) == 7:
  199.                 result += chr(c)
  200.                 c = 0
  201.             pos += 1
  202.         return result
  203.     def __permutate(self, table, block):
  204.         return [block[x] for x in table]
  205.     def __create_sub_keys(self):
  206.         key = self.__permutate(Des.__pc1, self.__String_to_BitList(self.getKey()))
  207.         i = 0
  208.         self.L = key[:28]
  209.         self.R = key[28:]
  210.         while i < 16:
  211.             j = 0
  212.             while j < Des.__left_rotations[i]:
  213.                 self.L.append(self.L[0])
  214.                 del self.L[0]
  215.                 self.R.append(self.R[0])
  216.                 del self.R[0]
  217.                 j += 1
  218.             self.Kn[i] = self.__permutate(Des.__pc2, self.L + self.R)
  219.             i += 1
  220.     def __des_crypt(self, block, crypt_type):
  221.         block = self.__permutate(Des.__ip, block)
  222.         self.L = block[:32]
  223.         self.R = block[32:]
  224.         if crypt_type == Des.ENCRYPT:
  225.             iteration = 0
  226.             iteration_adjustment = 1
  227.         else:
  228.             iteration = 15
  229.             iteration_adjustment = -1
  230.         i = 0
  231.         while i < 16:
  232.             tempR = self.R[:]
  233.             self.R = self.__permutate(Des.__expansion_table, self.R)
  234.             self.R = [x ^ y for x,y in zip(self.R, self.Kn[iteration])]
  235.             B = [self.R[:6], self.R[6:12], self.R[12:18], self.R[18:24], self.R[24:30], self.R[30:36], self.R[36:42], self.R[42:]]
  236.             j = 0
  237.             Bn = [0] * 32
  238.             pos = 0
  239.             while j < 8:
  240.                 m = (B[j][0] << 1) + B[j][5]
  241.                 n = (B[j][1] << 3) + (B[j][2] << 2) + (B[j][3] << 1) + B[j][4]
  242.                 v = Des.__sbox[j][(m << 4) + n]
  243.                 Bn[pos] = (v & 8) >> 3
  244.                 Bn[pos + 1] = (v & 4) >> 2
  245.                 Bn[pos + 2] = (v & 2) >> 1
  246.                 Bn[pos + 3] = v & 1
  247.                 pos += 4
  248.                 j += 1
  249.             self.R = self.__permutate(Des.__p, Bn)
  250.             self.R = [x ^ y for x, y in zip(self.R, self.L)]
  251.             self.L = tempR
  252.             i += 1
  253.             iteration += iteration_adjustment
  254.         self.final = self.__permutate(Des.__fp, self.R + self.L)
  255.         return self.final
  256.     def crypt(self, data, crypt_type):
  257.         if not data:
  258.             return ''
  259.         if len(data) % self.block_size != 0:
  260.             if crypt_type == Des.DECRYPT: # Decryption must work on 8 byte blocks
  261.                 raise ValueError("Invalid data length, data must be a multiple of " + str(self.block_size) + " bytes\n.")
  262.             if not self.getPadding():
  263.                 raise ValueError("Invalid data length, data must be a multiple of " + str(self.block_size) + " bytes\n. Try setting the optional padding character")
  264.             else:
  265.                 data += (self.block_size - (len(data) % self.block_size)) * self.getPadding()
  266.         if self.getMode() == CBC:
  267.             if self.getIV():
  268.                 iv = self.__String_to_BitList(self.getIV())
  269.             else:
  270.                 raise ValueError("For CBC mode, you must supply the Initial Value (IV) for ciphering")
  271.         i = 0
  272.         dict = {}
  273.         result = []
  274.         while i < len(data):
  275.             block = self.__String_to_BitList(data[i:i+8])
  276.             if self.getMode() == CBC:
  277.                 if crypt_type == Des.ENCRYPT:
  278.                     block = [x ^ y for x, y in zip(block, iv)]
  279.                 processed_block = self.__des_crypt(block, crypt_type)
  280.                 if crypt_type == Des.DECRYPT:
  281.                     processed_block = [x ^ y for x, y in zip(processed_block, iv)]
  282.                     iv = block
  283.                 else:
  284.                     iv = processed_block
  285.             else:
  286.                 processed_block = self.__des_crypt(block, crypt_type)
  287.             result.append(self.__BitList_to_String(processed_block))
  288.             i += 8
  289.         if crypt_type == Des.DECRYPT and self.getPadding():
  290.             s = result[-1]
  291.             while s[-1] == self.getPadding():
  292.                 s = s[:-1]
  293.             result[-1] = s
  294.         return ''.join(result)
  295.     def encrypt(self, data, pad=''):
  296.         self.__padding = pad
  297.         return self.crypt(data, Des.ENCRYPT)
  298.     def decrypt(self, data, pad=''):
  299.         self.__padding = pad
  300.         return self.crypt(data, Des.DECRYPT)
  301.  
  302. class Sectionizer(object):
  303.     def __init__(self, filename, ident):
  304.         self.contents = file(filename, 'rb').read()
  305.         self.header = self.contents[0:72]
  306.         if DEBUG:
  307.             file("header.dat", 'wb').write(self.header)
  308.  
  309.         self.num_sections, = struct.unpack('>H', self.contents[76:78])
  310.         if DEBUG:
  311.             print "number of sections: %d" % self.num_sections
  312.         if self.header[0x3C:0x3C+8] != ident:
  313.             raise ValueError('Invalid file format')
  314.         self.sections = []
  315.         for i in xrange(self.num_sections):
  316.             offset, a1,a2,a3,a4 = struct.unpack('>LBBBB', self.contents[78+i*8:78+i*8+8])
  317.             flags, val = a1, a2<<16|a3<<8|a4
  318.             if DEBUG:
  319.                 print "section %d offset %d" % ( i, offset )
  320.             self.sections.append( (offset, flags, val) )
  321.     def loadSection(self, section):
  322.         if section + 1 == self.num_sections:
  323.             end_off = len(self.contents)
  324.         else:
  325.             end_off = self.sections[section + 1][0]
  326.         off = self.sections[section][0]
  327.         return self.contents[off:end_off]
  328.  
  329. def sanitizeFileName(s):
  330.     r = ''
  331.     for c in s.lower():
  332.         if c in "abcdefghijklmnopqrstuvwxyz0123456789_.-":
  333.             r += c
  334.     return r
  335.  
  336. def fixKey(key):
  337.     def fixByte(b):
  338.         return b ^ ((b ^ (b<<1) ^ (b<<2) ^ (b<<3) ^ (b<<4) ^ (b<<5) ^ (b<<6) ^ (b<<7) ^ 0x80) & 0x80)
  339.     return "".join([chr(fixByte(ord(a))) for a in key])
  340.  
  341. def deXOR(text, sp, table):
  342.     r=''
  343.     j = sp
  344.     for i in xrange(len(text)):
  345.         r += chr(ord(table[j]) ^ ord(text[i]))
  346.         j = j + 1
  347.         if j == len(table):
  348.             j = 0
  349.     return r
  350.  
  351. class EreaderProcessor(object):
  352.     def __init__(self, section_reader, username, creditcard):
  353.         self.section_reader = section_reader
  354.         data = section_reader(0)
  355.         self.data0 = data
  356.         if DEBUG:
  357.             file("data0.dat", 'wb').write(self.data0)
  358.         version,  = struct.unpack('>H', data[0:2])
  359.         self.version = version
  360.         logging.info('eReader file format version %s', version)
  361.         if version != 272 and version != 260 and version != 259:
  362.             raise ValueError('incorrect eReader version %d (error 1)' % version)
  363.         data = section_reader(1)
  364.         self.data = data
  365.         # first key is used on last 8 bytes of data to get cookie_shuf and cookie_size
  366.         self.first_key = data[0:8]
  367.         des = Des(fixKey(self.first_key))
  368.         self.end_key = des.decrypt(data[-8:])
  369.         cookie_shuf, cookie_size = struct.unpack('>LL', self.end_key)
  370.         if cookie_shuf < 3 or cookie_shuf > 0x14 or cookie_size < 0xf0 or cookie_size > 0x200:
  371.             raise ValueError('incorrect eReader version (error 2)')
  372.         # first key is also used to decrypt all remaining bytes in data into their shuffled version
  373.         cookie = des.decrypt(data[-cookie_size:])
  374.        
  375.         # now unshuffle it
  376.         def unshuff(data, shuf):
  377.             r = [''] * len(data)
  378.             j = 0
  379.             for i in xrange(len(data)):
  380.                 j = (j + shuf) % len(data)
  381.                 r[j] = data[i]
  382.             assert len("".join(r)) == len(data)
  383.             return "".join(r)
  384.         r = unshuff(cookie[0:-8], cookie_shuf)
  385.         if DEBUG:
  386.             file("mainrecord.dat", 'wb').write(r)
  387.        
  388.         def fixUsername(s):
  389.             r = ''
  390.             for c in s.lower():
  391.                 if (c >= 'a' and c <= 'z' or c >= '0' and c <= '9'):
  392.                     r += c
  393.             return r
  394.        
  395.         # second key is made of of user private info i.e. name and crediticard info
  396.         user_key = struct.pack('>LL', binascii.crc32(fixUsername(username)) & 0xffffffff, binascii.crc32(creditcard[-8:])& 0xffffffff)
  397.         self.user_key = user_key
  398.        
  399.         # the unshuffled data is examined to find record information
  400.         drm_sub_version = struct.unpack('>H', r[0:2])[0]
  401.         self.num_text_pages = struct.unpack('>H', r[2:4])[0] - 1
  402.         self.num_image_pages = struct.unpack('>H', r[26:26+2])[0]
  403.         self.first_image_page = struct.unpack('>H', r[24:24+2])[0]
  404.  
  405.         if version == 272:
  406.             self.num_chapter_pages = struct.unpack('>H', r[22:22+2])[0]
  407.             self.first_chapter_page = struct.unpack('>H', r[20:20+2])[0]
  408.  
  409.             self.num_link_pages = struct.unpack('>H', r[30:30+2])[0]
  410.             self.first_link_page = struct.unpack('>H', r[28:28+2])[0]
  411.  
  412.             self.num_bkinfo_pages = struct.unpack('>H', r[34:34+2])[0]
  413.             self.first_bkinfo_page = struct.unpack('>H', r[32:32+2])[0]
  414.  
  415.             self.num_footnote_pages = struct.unpack('>H', r[46:46+2])[0]
  416.             self.first_footnote_page = struct.unpack('>H', r[44:44+2])[0]
  417.  
  418.             self.num_xtextsize_pages = struct.unpack('>H', r[54:54+2])[0]
  419.             self.first_xtextsize_page = struct.unpack('>H', r[52:52+2])[0]
  420.  
  421.             self.num_sidebar_pages = struct.unpack('>H', r[38:38+2])[0]
  422.             self.first_sidebar_page = struct.unpack('>H', r[36:36+2])[0]
  423.  
  424.             # **before** data record 1 was decrypted and unshuffled, it contained data
  425.             # to create an XOR table and which is used to fix footnote record 0, link records, chapter records, etc
  426.             self.xortable_offset  = struct.unpack('>H', r[40:40+2])[0]
  427.             self.xortable_size = struct.unpack('>H', r[42:42+2])[0]
  428.             self.xortable = self.data[self.xortable_offset:self.xortable_offset + self.xortable_size]
  429.         else:
  430.             self.num_chapter_pages = 0
  431.             self.num_link_pages = 0
  432.             self.num_bkinfo_pages = 0
  433.             self.num_footnote_pages = 0
  434.             self.num_xtextsize_pages = 0
  435.             self.num_sidebar_pages = 0
  436.             self.first_chapter_page = -1
  437.             self.first_link_page = -1
  438.             self.first_bkinfo_page = -1
  439.             self.first_footnote_page = -1
  440.             self.first_xtextsize_page = -1
  441.             self.first_sidebar_page = -1
  442.  
  443.         if DEBUG:
  444.             print "num_text_pages: %d" % self.num_text_pages
  445.             print "first_text_page: %d" % 1
  446.  
  447.             print "num_chapter_pages: %d" % self.num_chapter_pages
  448.             print "first_chapter_page: %d" % self.first_chapter_page
  449.  
  450.             print "num_image_pages: %d" % self.num_image_pages
  451.             print "first_image_page: %d" % self.first_image_page
  452.  
  453.             print "num_footnote_pages: %d" % self.num_footnote_pages
  454.             print "first_footnote_page: %d" % self.first_footnote_page
  455.  
  456.             print "num_link_pages: %d" % self.num_link_pages
  457.             print "first_link_page: %d" % self.first_link_page
  458.  
  459.             print "num_bkinfo_pages: %d" % self.num_bkinfo_pages
  460.             print "first_bkinfo_page: %d" % self.first_bkinfo_page
  461.  
  462.             print "num_xtextsize_pages: %d" % self.num_xtextsize_pages
  463.             print "first_xtextsize_page: %d" % self.first_xtextsize_page
  464.  
  465.             print "num_sidebar_pages: %d" % self.num_sidebar_pages
  466.             print "first_sidebar_page: %d" % self.first_sidebar_page
  467.  
  468.         logging.debug('self.num_text_pages %d', self.num_text_pages)
  469.         logging.debug('self.num_footnote_pages %d, self.first_footnote_page %d', self.num_footnote_pages , self.first_footnote_page)
  470.        
  471.         self.flags = struct.unpack('>L', r[4:8])[0]
  472.         reqd_flags = (1<<9) | (1<<7) | (1<<10)
  473.         if (self.flags & reqd_flags) != reqd_flags:
  474.             print "Flags: 0x%X" % self.flags
  475.             raise ValueError('incompatible eReader file')
  476.         # the user_key is used to unpack the encrypted key which is stored in the unshuffled data
  477.         des = Des(fixKey(user_key))
  478.         if version == 259:
  479.             if drm_sub_version != 7:
  480.                 raise ValueError('incorrect eReader version %d (error 3)' % drm_sub_version)
  481.             encrypted_key_sha = r[44:44+20]
  482.             encrypted_key = r[64:64+8]
  483.         elif version == 260:
  484.             if drm_sub_version != 13:
  485.                 raise ValueError('incorrect eReader version %d (error 3)' % drm_sub_version)
  486.             encrypted_key = r[44:44+8]
  487.             encrypted_key_sha = r[52:52+20]
  488.         elif version == 272:
  489.             encrypted_key = r[172:172+8]
  490.             encrypted_key_sha = r[56:56+20]
  491.  
  492.         # the decrypted version of encrypted_key is the content_key
  493.         self.content_key = des.decrypt(encrypted_key)
  494.        
  495.         if sha1(self.content_key).digest() != encrypted_key_sha:
  496.             raise ValueError('Incorrect Name and/or Credit Card')
  497.            
  498.     def getNumImages(self):
  499.         return self.num_image_pages
  500.        
  501.     def getImage(self, i):
  502.         sect = self.section_reader(self.first_image_page + i)
  503.         name = sect[4:4+32].strip('\0')
  504.         data = sect[62:]
  505.         return sanitizeFileName(name), data
  506.        
  507.    
  508.     def getChapterNamePMLOffsetData(self):
  509.         cv = ''
  510.         if self.num_chapter_pages > 0:
  511.             # now dump chapter offsets and chapter names
  512.             # see mobile read wiki for details
  513.             for i in xrange(self.num_chapter_pages):
  514.                 chaps = self.section_reader(self.first_chapter_page + i)
  515.                 j = i % self.xortable_size
  516.                 cv += deXOR(chaps, j, self.xortable)
  517.         return cv
  518.  
  519.     def getLinkNamePMLOffsetData(self):
  520.         lv = ''
  521.         if self.num_link_pages > 0:
  522.             # now dump link offset and link names
  523.             # see mobileread wiki for details
  524.             for i in xrange(self.num_link_pages):
  525.                 links = self.section_reader(self.first_link_page + i)
  526.                 j = i % self.xortable_size
  527.                 lv += deXOR(links, j, self.xortable)
  528.         return lv
  529.  
  530.  
  531.     def getBookInfoData(self):
  532.         bi = ''
  533.         if self.num_bkinfo_pages > 0:
  534.             # now dump book information
  535.             # see mobileread wiki for details
  536.             for i in xrange(self.num_bkinfo_pages):
  537.                 binfo = self.section_reader(self.first_bkinfo_page + i)
  538.                 j = i % self.xortable_size
  539.                 bi += deXOR(binfo, j, self.xortable)
  540.         return bi
  541.  
  542.  
  543.     def getExpandedTextSizesData(self):
  544.         ts = ''
  545.         if self.num_xtextsize_pages > 0:
  546.             # now dump table of expanded sizes for each text page
  547.             # (two bytes for each text page - see mobileread wiki for details)
  548.             for i in xrange(self.num_xtextsize_pages):
  549.                 tsize = self.section_reader(self.first_xtextsize_page + i)
  550.                 j = i % self.xortable_size
  551.                 ts += deXOR(tsize, j, self.xortable)
  552.         return ts
  553.  
  554.     def getText(self):
  555.         # uses the content_key and zlib to decrypt and then inflate text sections
  556.         des = Des(fixKey(self.content_key))
  557.         r = ''
  558.         for i in xrange(self.num_text_pages):
  559.             logging.debug('get page %d', i)
  560.             r += zlib.decompress(des.decrypt(self.section_reader(1 + i)))
  561.              
  562.         # now handle footnotes pages
  563.         if self.num_footnote_pages > 0:
  564.             # the first record of the footnote section must pass through the Xor Table to make it useful
  565.             sect = self.section_reader(self.first_footnote_page)
  566.             fnote_ids = deXOR(sect, 0, self.xortable)
  567.             p = 0
  568.             # the remaining records of the footnote sections need to be decoded with the content_key and zlib inflated
  569.             des = Des(fixKey(self.content_key))
  570.             r += '\\w="100%"'
  571.             r += 'Footnotes\p'
  572.             for i in xrange(1,self.num_footnote_pages):
  573.                 id_len = ord(fnote_ids[2])
  574.                 id = fnote_ids[3:3+id_len]
  575.                 fmarker='\Q="%s"' % id
  576.                 r+=fmarker
  577.                 r += zlib.decompress(des.decrypt(self.section_reader(self.first_footnote_page + i)))
  578.                 r += '\n'
  579.                 fnote_ids = fnote_ids[id_len+4:]
  580.  
  581.         # TO-DO - handle sidebar pages similar to footnotes pages
  582.  
  583.         return r
  584.  
  585. class PmlConverter(object):
  586.     def __init__(self, s):
  587.         self.s = s
  588.         self.pos = 0
  589.     def nextOptAttr(self):
  590.         p = self.pos
  591.         if self.s[p:p+2] != '="':
  592.             return None
  593.         r = ''
  594.         p += 2
  595.         while self.s[p] != '"':
  596.             r += self.s[p]
  597.             p += 1
  598.         self.pos = p + 1
  599.         return r
  600.     def next(self):
  601.         p = self.pos
  602.         if p >= len(self.s):
  603.             return None
  604.         if self.s[p] != '\\':
  605.             res = self.s.find('\\', p)
  606.             if res == -1:
  607.                 res = len(self.s)
  608.             self.pos = res
  609.             return self.s[p : res], None, None
  610.         c = self.s[p+1]
  611.         if c in 'pxcriuovtnsblBk-lI\\d':
  612.             self.pos = p + 2
  613.             return None, c, None
  614.         if c in 'TwmqQ':
  615.             self.pos = p + 2
  616.             return None, c, self.nextOptAttr()
  617.         if c == 'a':
  618.             self.pos = p + 5
  619.             return None, c, int(self.s[p+2:p+5])
  620.         if c == 'U':
  621.             self.pos = p + 6
  622.             return None, c, int(self.s[p+2:p+6], 16)
  623.         c = self.s[p+1:p+1+2]
  624.         if c in ('X0','X1','X2','X3','X4','Sp','Sb'):
  625.             self.pos = p + 3
  626.             return None, c, None
  627.         if c in ('C0','C1','C2','C3','C4','Fn','Sd'):
  628.             self.pos = p + 3
  629.             return None, c, self.nextOptAttr()
  630.         print "unknown escape code %s" % c
  631.         self.pos = p + 1
  632.         return None, None, None
  633.     def linkPrinter(link):
  634.         return '<a href="%s">' % link
  635.     def footnotePrinter(link):
  636.         return '<a href="#%s">' % link ## TODO may need to cgi.escape name....
  637.     def LinePrinter(link):
  638.         return '<hr width="%s">' % link
  639.     def ChapterTitle(link):
  640.         print "Nonfatal Error: ChapterTitle not implemented."
  641.         return '<!-- ChapterTitle %s -->' %link
  642.     def IndentPercent(link):
  643.         print "Nonfatal Error: IndentPercent not implemented."
  644.         return '<!-- IndentPercent: %s -->' %link
  645.     def NormalFont(link):
  646.         print "Nonfatal Error: NormalFont not implemented."
  647.         return '<!-- NormalFont %s -->' %link
  648.     def StdFont(link):
  649.         print "Nonfatal Error: StdFont not implemented."
  650.         return '<!-- StdFont: %s -->' %link
  651.     def SingleBackslash(link):
  652.         print "Nonfatal Error: SingleBackslash not implemented."
  653.         return '<!-- SingleBackslash: %s -->' %link
  654.     def SoftHyphen(link):
  655.         print "Nonfatal Error: SoftHyphen not implemented."
  656.         return '<!-- SoftHyphen: %s -->' %link
  657.     def ReferenceIndexItem(link):
  658.         print "Nonfatal Error: ReferenceIndexItem not implemented."
  659.         return '<!-- CReferenceIndexItem: %s -->' %link
  660.  
  661.    
  662.     # See http://wiki.mobileread.com/wiki/PML#Palm_Markup_Language
  663.     html_tags = {
  664.         'c' : ('<div class="center">', '</div>\n'),
  665.         'r' : ('<div class="right">', '</div>\n'),
  666.         'i' : ('<i>', '</i>'),
  667.         'u' : ('<u>', '</u>'),
  668.         'b' : ('<strong>', '</strong>'),
  669.         'B' : ('<strong>', '</strong>'),
  670.         'o' : ('<strike>', '</strike>'),
  671.         'v' : ('<!-- ', ' -->'),
  672.         't' : ('', ''),
  673.         'Sb' : ('<sub>', '</sub>'),
  674.         'Sp' : ('<sup>', '</sup>'),
  675.         'X0' : ('<h1>', '</h1>\n'),
  676.         'X1' : ('<h2>', '</h2>\n'),
  677.         'X2' : ('<h3>', '</h3>\n'),
  678.         'X3' : ('<h4>', '</h4>\n'),
  679.         'X4' : ('<h5>', '</h5>\n'),
  680.         'l' : ('<font size="+2">', '</font>'),
  681.         'q' : (linkPrinter, '</a>'),
  682.         'Fn' : (footnotePrinter, '</a>'),
  683.         'w' : (LinePrinter, ''),
  684.         #'m' : handled in if block,
  685.         #'Q' : handled in if block,
  686.         #'a' : handled in if block,
  687.         #'U' : handled in if block,
  688.         'x' : ('<h1 class="breakbefore">', '</h1>\n'),
  689.         'Cn' : (ChapterTitle, ''),
  690.         'T' : (IndentPercent, ''),
  691.         'n' : (NormalFont, ''),
  692.         #'s' : (StdFont, ''),
  693.         's' : ('', ''),
  694.         'k' : ('<span style="font-variant: small-caps;">', '</span>'), # NOTE some pdb's then go ahead and use uppercase letters - which doesn't format the way one would expect (perhaps post process the output with html dom and lower case if only upper case letters are found?)
  695.         '\\' : (SingleBackslash, ''),
  696.         '-' : (SoftHyphen, ''),
  697.         'I' : (ReferenceIndexItem, ''),
  698.         'Sd' : (footnotePrinter, '</a>'), ## untested
  699.     }
  700.     html_one_tags = {
  701.         'p' : '<p class="breakafter">&nbsp;</p>\n'
  702.     }
  703.     pml_chars = {
  704.         160 : '&nbsp;',130 : '&#8212;',131: '&#402;',132: '&#8222;',
  705.         133: '&#8230;',134: '&#8224;',135: '&#8225;',138: '&#352;',
  706.         139: '&#8249;',140: '&#338;',145: '&#8216;',146: '&#8217;',
  707.         147: '&#8220;',148: '&#8221;',149: '&#8226;',150: '&#8211;',
  708.         151: '&#8212;',153: '&#8482;',154: '&#353;',155: '&#8250;',
  709.         156: '&#339;',159: '&#376;'
  710.     }
  711.     def process(self):
  712.         final = '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">\n<html>\n<head>\n<meta http-equiv="content-type" content="text/html; charset=windows-1252">\n<style type="text/css">\ndiv.center { text-align:center; }\ndiv.right { text-align:right; }\n.breakbefore { page-break-before: always; }\n.breakafter { page-break-after: always; }\n</style>\n</head>\n<body>\n'
  713.         in_tags = []
  714.         def makeText(s):
  715.             s = s.replace('&', '&amp;')
  716.             #s = s.replace('"', '&quot;')
  717.             s = s.replace('<', '&lt;')
  718.             s = s.replace('>', '&gt;')
  719.             s = s.replace('\n', '<br>\n')
  720.             return s
  721.         while True:
  722.             r = self.next()
  723.             if not r:
  724.                 break
  725.             text, cmd, attr = r
  726.             if text:
  727.                 final += makeText(text)
  728.             if cmd:
  729.                 def getTag(ti, end):
  730.                     cmd, attr = ti
  731.                     r = self.html_tags[cmd][end]
  732.                     if type(r) != str:
  733.                         r = r(attr)
  734.                     return r
  735.                    
  736.                 if cmd in self.html_tags:
  737.                     pair = (cmd, attr)
  738.                     if cmd not in [a for (a,b) in in_tags]:
  739.                         final += getTag(pair, False)
  740.                         in_tags.append(pair)
  741.                     else:
  742.                         j = len(in_tags)
  743.                         while True:
  744.                             j = j - 1
  745.                             final += getTag(in_tags[j], True)
  746.                             if in_tags[j][0] == cmd:
  747.                                 break
  748.                         del in_tags[j]
  749.                         while j < len(in_tags):
  750.                             final += getTag(in_tags[j], False)
  751.                             j = j + 1
  752.                            
  753.                 if cmd in self.html_one_tags:
  754.                     final += self.html_one_tags[cmd]
  755.                 if cmd == 'm':
  756.                     unquotedimagepath = bookname + "_img/" + attr
  757.                     imagepath = urllib.quote( unquotedimagepath )
  758.                     final += '<img src="%s" alt="">' % imagepath
  759.                 if cmd == 'Q':
  760.                     final += '<a name="%s" id="%s"> </a>' % (attr, attr)
  761.                 if cmd == 'a':
  762.                     final += self.pml_chars.get(attr, '&#%d;' % attr)
  763.                 if cmd == 'U':
  764.                     final += '&#%d;' % attr
  765.         final += '</body></html>\n'
  766.         while True:
  767.             s = final.replace('<br>\n<br>\n<br>\n', '<br>\n<br>\n')
  768.             if s == final:
  769.                 break
  770.             final = s
  771.         return final
  772.  
  773. def convertEreaderToHtml(infile, name, cc, outdir):
  774.     if not os.path.exists(outdir):
  775.         os.makedirs(outdir)
  776.     sect = Sectionizer(infile, 'PNRdPPrs')
  777.     er = EreaderProcessor(sect.loadSection, name, cc)
  778.  
  779.     if er.getNumImages() > 0:
  780.         imagedir = bookname + "_img"
  781.         imagedirpath = os.path.join(outdir,imagedir)
  782.         if not os.path.exists(imagedirpath):
  783.             os.makedirs(imagedirpath)
  784.         for i in xrange(er.getNumImages()):
  785.             name, contents = er.getImage(i)
  786.             file(os.path.join(imagedirpath, name), 'wb').write(contents)
  787.  
  788.     pml_string = er.getText()
  789.     pml = PmlConverter(pml_string)
  790.     pmlfilename = bookname + ".pml"
  791.     htmlfilename = bookname + ".html"
  792.     file(os.path.join(outdir, pmlfilename),'wb').write(pml_string)
  793.     file(os.path.join(outdir, htmlfilename),'wb').write(pml.process())
  794.    
  795.     ts = er.getExpandedTextSizesData()
  796.     file(os.path.join(outdir, 'xtextsizes.dat'), 'wb').write(ts)
  797.  
  798.     cv = er.getChapterNamePMLOffsetData()
  799.     file(os.path.join(outdir, 'chapters.dat'), 'wb').write(cv)
  800.  
  801.     bi = er.getBookInfoData()
  802.     file(os.path.join(outdir, 'bookinfo.dat'), 'wb').write(bi)
  803.    
  804.     lv = er.getLinkNamePMLOffsetData()
  805.     file(os.path.join(outdir, 'links.dat'), 'wb').write(lv)
  806.  
  807. def main(argv=None):
  808.     global bookname
  809.     if argv is None:
  810.         argv = sys.argv
  811.    
  812.     print "eReader2Html v%s. Copyright (c) 2008 The Dark Reverser" % __version__
  813.  
  814.     if len(argv)!=4 and len(argv)!=5:
  815.         print "Converts DRMed eReader books to PML Source and HTML"
  816.         print "Usage:"
  817.         print "  ereader2html infile.pdb [outdir] \"your name\" credit_card_number "
  818.         print "Note:"
  819.         print "  if ommitted, outdir defaults based on 'infile.pdb'"
  820.         print "  It's enough to enter the last 8 digits of the credit card number"
  821.     else:
  822.         if len(argv)==4:
  823.             infile, name, cc = argv[1], argv[2], argv[3]
  824.             outdir = infile[:-4] + '_Source'
  825.         elif len(argv)==5:
  826.             infile, outdir, name, cc = argv[1], argv[2], argv[3], argv[4]
  827.         bookname = os.path.splitext(os.path.basename(infile))[0]
  828.        
  829.         try:
  830.             print "Processing..."
  831.             import time
  832.             start_time = time.time()
  833.             convertEreaderToHtml(infile, name, cc, outdir)
  834.             end_time = time.time()
  835.             search_time = end_time - start_time
  836.             print 'elapsed time: %.2f seconds' % (search_time, )
  837.             print 'output in %s' % outdir
  838.             print "done"
  839.         except ValueError, e:
  840.             print "Error: %s" % e
  841.  
  842. if __name__ == "__main__":
  843.     #import cProfile
  844.     #command = """sys.exit(main())"""
  845.     #cProfile.runctx( command, globals(), locals(), filename="cprofile.profile" )
  846.    
  847.     sys.exit(main())
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