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brutusbum

a guest Dec 1st, 2009 3,439 Never
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  1. #!/usr/bin/env python
  2. # vim:ts=4:sw=4:softtabstop=4:smarttab:expandtab
  3. #
  4. # This is a python script. You need a Python interpreter to run it.
  5. # For example, ActiveState Python, which exists for windows.
  6. # Changelog
  7. #  0.01 - Initial version
  8. #  0.02 - Support more eReader files. Support bold text and links. Fix PML decoder parsing bug.
  9. #  0.03 - Fix incorrect variable usage at one place.
  10. #  0.03b - enhancement by DeBockle (version 259 support)
  11. # Custom version 0.03 - no change to eReader support, only usability changes
  12. #   - start of pep-8 indentation (spaces not tab), fix trailing blanks
  13. #   - version variable, only one place to change
  14. #   - added main routine, now callable as a library/module,
  15. #     means tools can add optional support for ereader2html
  16. #   - outdir is no longer a mandatory parameter (defaults based on input name if missing)
  17. #   - time taken output to stdout
  18. #   - Psyco support - reduces runtime by a factor of (over) 3!
  19. #     E.g. (~600Kb file) 90 secs down to 24 secs
  20. #       - newstyle classes
  21. #       - changed map call to list comprehension
  22. #         may not work with python 2.3
  23. #         without Psyco this reduces runtime to 90%
  24. #         E.g. 90 secs down to 77 secs
  25. #         Psyco with map calls takes longer, do not run with map in Psyco JIT!
  26. #       - izip calls used instead of zip (if available), further reduction
  27. #         in run time (factor of 4.5).
  28. #         E.g. (~600Kb file) 90 secs down to 20 secs
  29. #   - Python 2.6+ support, avoid DeprecationWarning with sha/sha1
  30. #  0.04 - Footnote support, PML output, correct charset in html, support more PML tags
  31. #   - Feature change, dump out PML file
  32. #   - Added supprt for footnote tags. NOTE footnote ids appear to be bad (not usable)
  33. #       in some pdb files :-( due to the same id being used multiple times
  34. #   - Added correct charset encoding (pml is based on cp1252)
  35. #   - Added logging support.
  36. #  
  37. #   TODO run this through a profiler - speed increases so far was from
  38. #   applying "quick known fixes", added (commented out) cprofiler call
  39. #  0.05 - Improved type 272 support for sidebars, links, chapters, metainfo, etc
  40. #  0.06 - Merge of 0.04 and 0.05. Improved HTML output
  41. #         Placed images in subfolder, so that it's possible to just
  42. #         drop the book.pml file onto DropBook to make an unencrypted
  43. #         copy of the eReader file.
  44. #         Using that with Calibre works a lot better than the HTML
  45. #         conversion in this code.
  46. #  0.07 - Further Improved type 272 support for sidebars with all earlier fixes
  47. #  0.08 - fixed typos, removed extraneous things
  48. #  0.09 - tried to greatly improve html conversion especially with \t tags
  49.  
  50. __version__='0.09'
  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.  
  84. ECB =   0
  85. CBC =   1
  86. class Des(object):
  87.     __pc1 = [56, 48, 40, 32, 24, 16,  8,  0, 57, 49, 41, 33, 25, 17,
  88.           9,  1, 58, 50, 42, 34, 26, 18, 10,  2, 59, 51, 43, 35,
  89.          62, 54, 46, 38, 30, 22, 14,  6, 61, 53, 45, 37, 29, 21,
  90.          13,  5, 60, 52, 44, 36, 28, 20, 12,  4, 27, 19, 11,  3]
  91.     __left_rotations = [1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1]
  92.     __pc2 = [13, 16, 10, 23,  0,  4,2, 27, 14,  5, 20,  9,
  93.         22, 18, 11,  3, 25,  7, 15,  6, 26, 19, 12,  1,
  94.         40, 51, 30, 36, 46, 54, 29, 39, 50, 44, 32, 47,
  95.         43, 48, 38, 55, 33, 52, 45, 41, 49, 35, 28, 31]
  96.     __ip = [57, 49, 41, 33, 25, 17, 9,  1,      59, 51, 43, 35, 27, 19, 11, 3,
  97.         61, 53, 45, 37, 29, 21, 13, 563, 55, 47, 39, 31, 23, 15, 7,
  98.         56, 48, 40, 32, 24, 16, 8,  058, 50, 42, 34, 26, 18, 10, 2,
  99.         60, 52, 44, 36, 28, 20, 12, 462, 54, 46, 38, 30, 22, 14, 6]
  100.     __expansion_table = [31,  0,  1,  2,  3,  4, 3,  4,  5,  6,  7,  8,
  101.          7,  8,  9, 10, 11, 12,11, 12, 13, 14, 15, 16,
  102.         15, 16, 17, 18, 19, 20,19, 20, 21, 22, 23, 24,
  103.         23, 24, 25, 26, 27, 28,27, 28, 29, 30, 31,  0]
  104.     __sbox = [[14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7,
  105.          0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8,
  106.          4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0,
  107.          15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13],
  108.         [15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10,
  109.          3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5,
  110.          0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15,
  111.          13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9],
  112.         [10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8,
  113.          13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1,
  114.          13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7,
  115.          1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12],
  116.         [7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15,
  117.          13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9,
  118.          10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4,
  119.          3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14],
  120.         [2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9,
  121.          14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6,
  122.          4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14,
  123.          11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3],
  124.         [12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11,
  125.          10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8,
  126.          9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6,
  127.          4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13],
  128.         [4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1,
  129.          13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6,
  130.          1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2,
  131.          6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12],
  132.         [13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7,
  133.          1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2,
  134.          7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8,
  135.          2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11],]
  136.     __p = [15, 6, 19, 20, 28, 11,27, 16, 0, 14, 22, 25,
  137.         4, 17, 30, 9, 1, 7,23,13, 31, 26, 2, 8,18, 12, 29, 5, 21, 10,3, 24]
  138.     __fp = [39,  7, 47, 15, 55, 23, 63, 31,38,  6, 46, 14, 54, 22, 62, 30,
  139.         37,  5, 45, 13, 53, 21, 61, 29,36,  4, 44, 12, 52, 20, 60, 28,
  140.         35,  3, 43, 11, 51, 19, 59, 27,34,  2, 42, 10, 50, 18, 58, 26,
  141.         33,  1, 41,  9, 49, 17, 57, 25,32,  0, 40,  8, 48, 16, 56, 24]
  142.     # Type of crypting being done
  143.     ENCRYPT =   0x00
  144.     DECRYPT =   0x01
  145.     def __init__(self, key, mode=ECB, IV=None):
  146.         if len(key) != 8:
  147.             raise ValueError("Invalid DES key size. Key must be exactly 8 bytes long.")
  148.         self.block_size = 8
  149.         self.key_size = 8
  150.         self.__padding = ''
  151.         self.setMode(mode)
  152.         if IV:
  153.             self.setIV(IV)
  154.         self.L = []
  155.         self.R = []
  156.         self.Kn = [ [0] * 48 ] * 16     # 16 48-bit keys (K1 - K16)
  157.         self.final = []
  158.         self.setKey(key)
  159.     def getKey(self):
  160.         return self.__key
  161.     def setKey(self, key):
  162.         self.__key = key
  163.         self.__create_sub_keys()
  164.     def getMode(self):
  165.         return self.__mode
  166.     def setMode(self, mode):
  167.         self.__mode = mode
  168.     def getIV(self):
  169.         return self.__iv
  170.     def setIV(self, IV):
  171.         if not IV or len(IV) != self.block_size:
  172.             raise ValueError("Invalid Initial Value (IV), must be a multiple of " + str(self.block_size) + " bytes")
  173.         self.__iv = IV
  174.     def getPadding(self):
  175.         return self.__padding
  176.     def __String_to_BitList(self, data):
  177.         l = len(data) * 8
  178.         result = [0] * l
  179.         pos = 0
  180.         for c in data:
  181.             i = 7
  182.             ch = ord(c)
  183.             while i >= 0:
  184.                 if ch & (1 << i) != 0:
  185.                     result[pos] = 1
  186.                 else:
  187.                     result[pos] = 0
  188.                 pos += 1
  189.                 i -= 1
  190.         return result
  191.     def __BitList_to_String(self, data):
  192.         result = ''
  193.         pos = 0
  194.         c = 0
  195.         while pos < len(data):
  196.             c += data[pos] << (7 - (pos % 8))
  197.             if (pos % 8) == 7:
  198.                 result += chr(c)
  199.                 c = 0
  200.             pos += 1
  201.         return result
  202.     def __permutate(self, table, block):
  203.         return [block[x] for x in table]
  204.     def __create_sub_keys(self):
  205.         key = self.__permutate(Des.__pc1, self.__String_to_BitList(self.getKey()))
  206.         i = 0
  207.         self.L = key[:28]
  208.         self.R = key[28:]
  209.         while i < 16:
  210.             j = 0
  211.             while j < Des.__left_rotations[i]:
  212.                 self.L.append(self.L[0])
  213.                 del self.L[0]
  214.                 self.R.append(self.R[0])
  215.                 del self.R[0]
  216.                 j += 1
  217.             self.Kn[i] = self.__permutate(Des.__pc2, self.L + self.R)
  218.             i += 1
  219.     def __des_crypt(self, block, crypt_type):
  220.         block = self.__permutate(Des.__ip, block)
  221.         self.L = block[:32]
  222.         self.R = block[32:]
  223.         if crypt_type == Des.ENCRYPT:
  224.             iteration = 0
  225.             iteration_adjustment = 1
  226.         else:
  227.             iteration = 15
  228.             iteration_adjustment = -1
  229.         i = 0
  230.         while i < 16:
  231.             tempR = self.R[:]
  232.             self.R = self.__permutate(Des.__expansion_table, self.R)
  233.             self.R = [x ^ y for x,y in zip(self.R, self.Kn[iteration])]
  234.             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:]]
  235.             j = 0
  236.             Bn = [0] * 32
  237.             pos = 0
  238.             while j < 8:
  239.                 m = (B[j][0] << 1) + B[j][5]
  240.                 n = (B[j][1] << 3) + (B[j][2] << 2) + (B[j][3] << 1) + B[j][4]
  241.                 v = Des.__sbox[j][(m << 4) + n]
  242.                 Bn[pos] = (v & 8) >> 3
  243.                 Bn[pos + 1] = (v & 4) >> 2
  244.                 Bn[pos + 2] = (v & 2) >> 1
  245.                 Bn[pos + 3] = v & 1
  246.                 pos += 4
  247.                 j += 1
  248.             self.R = self.__permutate(Des.__p, Bn)
  249.             self.R = [x ^ y for x, y in zip(self.R, self.L)]
  250.             self.L = tempR
  251.             i += 1
  252.             iteration += iteration_adjustment
  253.         self.final = self.__permutate(Des.__fp, self.R + self.L)
  254.         return self.final
  255.     def crypt(self, data, crypt_type):
  256.         if not data:
  257.             return ''
  258.         if len(data) % self.block_size != 0:
  259.             if crypt_type == Des.DECRYPT: # Decryption must work on 8 byte blocks
  260.                 raise ValueError("Invalid data length, data must be a multiple of " + str(self.block_size) + " bytes\n.")
  261.             if not self.getPadding():
  262.                 raise ValueError("Invalid data length, data must be a multiple of " + str(self.block_size) + " bytes\n. Try setting the optional padding character")
  263.             else:
  264.                 data += (self.block_size - (len(data) % self.block_size)) * self.getPadding()
  265.         if self.getMode() == CBC:
  266.             if self.getIV():
  267.                 iv = self.__String_to_BitList(self.getIV())
  268.             else:
  269.                 raise ValueError("For CBC mode, you must supply the Initial Value (IV) for ciphering")
  270.         i = 0
  271.         dict = {}
  272.         result = []
  273.         while i < len(data):
  274.             block = self.__String_to_BitList(data[i:i+8])
  275.             if self.getMode() == CBC:
  276.                 if crypt_type == Des.ENCRYPT:
  277.                     block = [x ^ y for x, y in zip(block, iv)]
  278.                 processed_block = self.__des_crypt(block, crypt_type)
  279.                 if crypt_type == Des.DECRYPT:
  280.                     processed_block = [x ^ y for x, y in zip(processed_block, iv)]
  281.                     iv = block
  282.                 else:
  283.                     iv = processed_block
  284.             else:
  285.                 processed_block = self.__des_crypt(block, crypt_type)
  286.             result.append(self.__BitList_to_String(processed_block))
  287.             i += 8
  288.         if crypt_type == Des.DECRYPT and self.getPadding():
  289.             s = result[-1]
  290.             while s[-1] == self.getPadding():
  291.                 s = s[:-1]
  292.             result[-1] = s
  293.         return ''.join(result)
  294.     def encrypt(self, data, pad=''):
  295.         self.__padding = pad
  296.         return self.crypt(data, Des.ENCRYPT)
  297.     def decrypt(self, data, pad=''):
  298.         self.__padding = pad
  299.         return self.crypt(data, Des.DECRYPT)
  300.  
  301. class Sectionizer(object):
  302.     def __init__(self, filename, ident):
  303.         self.contents = file(filename, 'rb').read()
  304.         self.header = self.contents[0:72]
  305.         self.num_sections, = struct.unpack('>H', self.contents[76:78])
  306.         if self.header[0x3C:0x3C+8] != ident:
  307.             raise ValueError('Invalid file format')
  308.         self.sections = []
  309.         for i in xrange(self.num_sections):
  310.             offset, a1,a2,a3,a4 = struct.unpack('>LBBBB', self.contents[78+i*8:78+i*8+8])
  311.             flags, val = a1, a2<<16|a3<<8|a4
  312.             self.sections.append( (offset, flags, val) )
  313.     def loadSection(self, section):
  314.         if section + 1 == self.num_sections:
  315.             end_off = len(self.contents)
  316.         else:
  317.             end_off = self.sections[section + 1][0]
  318.         off = self.sections[section][0]
  319.         return self.contents[off:end_off]
  320.  
  321. def sanitizeFileName(s):
  322.     r = ''
  323.     for c in s.lower():
  324.         if c in "abcdefghijklmnopqrstuvwxyz0123456789_.-":
  325.             r += c
  326.     return r
  327.  
  328. def fixKey(key):
  329.     def fixByte(b):
  330.         return b ^ ((b ^ (b<<1) ^ (b<<2) ^ (b<<3) ^ (b<<4) ^ (b<<5) ^ (b<<6) ^ (b<<7) ^ 0x80) & 0x80)
  331.     return      "".join([chr(fixByte(ord(a))) for a in key])
  332.  
  333. def deXOR(text, sp, table):
  334.     r=''
  335.     j = sp
  336.     for i in xrange(len(text)):
  337.         r += chr(ord(table[j]) ^ ord(text[i]))
  338.         j = j + 1
  339.         if j == len(table):
  340.             j = 0
  341.     return r
  342.  
  343. class EreaderProcessor(object):
  344.     def __init__(self, section_reader, username, creditcard):
  345.         self.section_reader = section_reader
  346.         data = section_reader(0)
  347.         version,  = struct.unpack('>H', data[0:2])
  348.         self.version = version
  349.         logging.info('eReader file format version %s', version)
  350.         if version != 272 and version != 260 and version != 259:
  351.             raise ValueError('incorrect eReader version %d (error 1)' % version)
  352.         data = section_reader(1)
  353.         self.data = data
  354.         des = Des(fixKey(data[0:8]))
  355.         cookie_shuf, cookie_size = struct.unpack('>LL', des.decrypt(data[-8:]))
  356.         if cookie_shuf < 3 or cookie_shuf > 0x14 or cookie_size < 0xf0 or cookie_size > 0x200:
  357.             raise ValueError('incorrect eReader version (error 2)')
  358.         input = des.decrypt(data[-cookie_size:])
  359.         def unshuff(data, shuf):
  360.             r = [''] * len(data)
  361.             j = 0
  362.             for i in xrange(len(data)):
  363.                 j = (j + shuf) % len(data)
  364.                 r[j] = data[i]
  365.             assert      len("".join(r)) == len(data)
  366.             return "".join(r)
  367.         r = unshuff(input[0:-8], cookie_shuf)
  368.  
  369.         def fixUsername(s):
  370.             r = ''
  371.             for c in s.lower():
  372.                 if (c >= 'a' and c <= 'z' or c >= '0' and c <= '9'):
  373.                     r += c
  374.             return r
  375.  
  376.         user_key = struct.pack('>LL', binascii.crc32(fixUsername(username)) & 0xffffffff, binascii.crc32(creditcard[-8:])& 0xffffffff)
  377.         drm_sub_version = struct.unpack('>H', r[0:2])[0]
  378.         self.num_text_pages = struct.unpack('>H', r[2:4])[0] - 1
  379.         self.num_image_pages = struct.unpack('>H', r[26:26+2])[0]
  380.         self.first_image_page = struct.unpack('>H', r[24:24+2])[0]
  381.         if self.version == 272:
  382.             self.num_chapter_pages = struct.unpack('>H', r[22:22+2])[0]
  383.             self.first_chapter_page = struct.unpack('>H', r[20:20+2])[0]
  384.             self.num_link_pages = struct.unpack('>H', r[30:30+2])[0]
  385.             self.first_link_page = struct.unpack('>H', r[28:28+2])[0]
  386.             self.num_bookinfo_pages = struct.unpack('>H', r[34:34+2])[0]
  387.             self.first_bookinfo_page = struct.unpack('>H', r[32:32+2])[0]
  388.             self.num_footnote_pages = struct.unpack('>H', r[46:46+2])[0]
  389.             self.first_footnote_page = struct.unpack('>H', r[44:44+2])[0]
  390.             self.num_xtextsize_pages = struct.unpack('>H', r[54:54+2])[0]
  391.             self.first_xtextsize_page = struct.unpack('>H', r[52:52+2])[0]
  392.             self.num_sidebar_pages = struct.unpack('>H', r[38:38+2])[0]
  393.             self.first_sidebar_page = struct.unpack('>H', r[36:36+2])[0]
  394.  
  395.             # **before** data record 1 was decrypted and unshuffled, it contained data
  396.             # to create an XOR table and which is used to fix footnote record 0, link records, chapter records, etc
  397.             self.xortable_offset  = struct.unpack('>H', r[40:40+2])[0]
  398.             self.xortable_size = struct.unpack('>H', r[42:42+2])[0]
  399.             self.xortable = self.data[self.xortable_offset:self.xortable_offset + self.xortable_size]
  400.         else:
  401.             self.num_chapter_pages = 0
  402.             self.num_link_pages = 0
  403.             self.num_bookinfo_pages = 0
  404.             self.num_footnote_pages = 0
  405.             self.num_xtextsize_pages = 0
  406.             self.num_sidebar_pages = 0
  407.             self.first_chapter_page = -1
  408.             self.first_link_page = -1
  409.             self.first_bookinfo_page = -1
  410.             self.first_footnote_page = -1
  411.             self.first_xtextsize_page = -1
  412.             self.first_sidebar_page = -1
  413.  
  414.         logging.debug('self.num_text_pages %d', self.num_text_pages)
  415.         logging.debug('self.num_footnote_pages %d, self.first_footnote_page %d', self.num_footnote_pages , self.first_footnote_page)
  416.         logging.debug('self.num_sidebar_pages %d, self.first_sidebar_page %d', self.num_sidebar_pages , self.first_sidebar_page)
  417.         self.flags = struct.unpack('>L', r[4:8])[0]
  418.         reqd_flags = (1<<9) | (1<<7) | (1<<10)
  419.         if (self.flags & reqd_flags) != reqd_flags:
  420.             print "Flags: 0x%X" % self.flags
  421.             raise ValueError('incompatible eReader file')
  422.         des = Des(fixKey(user_key))
  423.         if version == 259:
  424.             if drm_sub_version != 7:
  425.                 raise ValueError('incorrect eReader version %d (error 3)' % drm_sub_version)
  426.             encrypted_key_sha = r[44:44+20]
  427.             encrypted_key = r[64:64+8]
  428.         elif version == 260:
  429.             if drm_sub_version != 13:
  430.                 raise ValueError('incorrect eReader version %d (error 3)' % drm_sub_version)
  431.             encrypted_key = r[44:44+8]
  432.             encrypted_key_sha = r[52:52+20]
  433.         elif version == 272:
  434.             encrypted_key = r[172:172+8]
  435.             encrypted_key_sha = r[56:56+20]
  436.         self.content_key = des.decrypt(encrypted_key)
  437.         if sha1(self.content_key).digest() != encrypted_key_sha:
  438.             raise ValueError('Incorrect Name and/or Credit Card')
  439.  
  440.     def getNumImages(self):
  441.         return self.num_image_pages
  442.  
  443.     def getImage(self, i):
  444.         sect = self.section_reader(self.first_image_page + i)
  445.         name = sect[4:4+32].strip('\0')
  446.         data = sect[62:]
  447.         return sanitizeFileName(name), data
  448.  
  449.     def getChapterNamePMLOffsetData(self):
  450.         cv = ''
  451.         if self.num_chapter_pages > 0:
  452.             for i in xrange(self.num_chapter_pages):
  453.                 chaps = self.section_reader(self.first_chapter_page + i)
  454.                 j = i % self.xortable_size
  455.                 offname = deXOR(chaps, j, self.xortable)
  456.                 offset = struct.unpack('>L', offname[0:4])[0]
  457.                 name = offname[4:].strip('\0')
  458.                 cv += '%d,%s\n' % (offset, name)
  459.         return cv
  460.  
  461.     def getLinkNamePMLOffsetData(self):
  462.         lv = ''
  463.         if self.num_link_pages > 0:
  464.             for i in xrange(self.num_link_pages):
  465.                 links = self.section_reader(self.first_link_page + i)
  466.                 j = i % self.xortable_size
  467.                 offname = deXOR(links, j, self.xortable)
  468.                 offset = struct.unpack('>L', offname[0:4])[0]
  469.                 name = offname[4:].strip('\0')
  470.                 lv += '%d,%s\n' % (offset, name)
  471.         return lv
  472.  
  473.     def getExpandedTextSizesData(self):
  474.          ts = ''
  475.          if self.num_xtextsize_pages > 0:
  476.              tsize = deXOR(self.section_reader(self.first_xtextsize_page), 0, self.xortable)
  477.              for i in xrange(self.num_text_pages):
  478.                  xsize = struct.unpack('>H', tsize[0:2])[0]
  479.                  ts += "%d\n" % xsize
  480.                  tsize = tsize[2:]
  481.          return ts
  482.  
  483.     def getBookInfo(self):
  484.         bkinfo = ''
  485.         if self.num_bookinfo_pages > 0:
  486.             info = self.section_reader(self.first_bookinfo_page)
  487.             bkinfo = deXOR(info, 0, self.xortable)
  488.         return bkinfo
  489.  
  490.     def getText(self):
  491.         des = Des(fixKey(self.content_key))
  492.         r = ''
  493.         for i in xrange(self.num_text_pages):
  494.             logging.debug('get page %d', i)
  495.             r += zlib.decompress(des.decrypt(self.section_reader(1 + i)))
  496.              
  497.         # now handle footnotes pages
  498.         if self.num_footnote_pages > 0:
  499.             # the record 0 of the footnote section must pass through the Xor Table to make it useful
  500.             sect = self.section_reader(self.first_footnote_page)
  501.             fnote_ids = deXOR(sect, 0, self.xortable)
  502.             # the remaining records of the footnote sections need to be decoded with the content_key and zlib inflated
  503.             des = Des(fixKey(self.content_key))
  504.             r += '\\w="100%"'
  505.             r += '\\pFootnotes:\n\n'
  506.             for i in xrange(1,self.num_footnote_pages):
  507.                 logging.debug('get footnotepage %d', i)
  508.                 id_len = ord(fnote_ids[2])
  509.                 id = fnote_ids[3:3+id_len]
  510.                 fmarker='\\t\\Q="footnote-%s"' % id
  511.                 r+=fmarker
  512.                 r += zlib.decompress(des.decrypt(self.section_reader(self.first_footnote_page + i)))
  513.                 r += '\\t\n\n'
  514.                 fnote_ids = fnote_ids[id_len+4:]
  515.  
  516. #               according to ereader pml spec we should be outputing the following xml for each footnote - but then we would have to handle
  517. #               parsing it back in to convert it since that xml is not valid xhtml
  518. #                fmarker = '<footnote id="footnote-%s">\n' % id
  519. #                fmarker += zlib.decompress(des.decrypt(self.section_reader(self.first_footnote_page + i)))
  520. #                fmarker += '\n</footnote>\n'
  521. #                r += fmarker
  522.  
  523.  
  524.         # now handle sidebar pages
  525.         if self.num_sidebar_pages > 0:
  526.             # the record 0 of the sidebar section must pass through the Xor Table to make it useful
  527.             sect = self.section_reader(self.first_sidebar_page)
  528.             sbar_ids = deXOR(sect, 0, self.xortable)
  529.             # the remaining records of the sidebar sections need to be decoded with the content_key and zlib inflated
  530.             des = Des(fixKey(self.content_key))
  531.             r += '\\w="100%"'
  532.             r += '\\pSidebars:\n\n'
  533.             for i in xrange(1,self.num_sidebar_pages):
  534.                 id_len = ord(sbar_ids[2])
  535.                 id = sbar_ids[3:3+id_len]
  536.                 smarker='\\t\\Q="sidebar-%s"' % id
  537.                 r+=smarker
  538.                 r += zlib.decompress(des.decrypt(self.section_reader(self.first_sidebar_page + i)))
  539.                 r += '\\t\n\n'
  540.                 sbar_ids = sbar_ids[id_len+4:]
  541.  
  542. #               according to ereader pml spec we should be outputing the following xml for each sidebar - but then we would have to handle
  543. #               parsing it back in to convert it since that xml is not valid xhtml
  544. #                smarker = '<sidebar id="sidebar-%s">\n' % id
  545. #                smarker += zlib.decompress(des.decrypt(self.section_reader(self.first_footnote_page + i)))
  546. #                smarker += '\n</sidebar>\n'
  547. #                r += smarker
  548.  
  549.         return r
  550.  
  551. class PmlConverter(object):
  552.     def __init__(self, s, bkinfo):
  553.         def findPrevStartofLine(src,p,n):
  554.             # find last end of previous line in substring from p to n
  555.             b1 = src.rfind('\n',p,n)
  556.             b2 = src.rfind('\\c',p,n)
  557.             b3 = src.rfind('\\r',p,n)
  558.             b4 = src.rfind('\\x',p,n)
  559.             b5 = src.rfind('\\p',p,n)
  560.             b = max(b1, b2, b3, b4, b5)
  561.             if b == -1:
  562.                 return n
  563.             if b == b1:
  564.                 return b + 1
  565.             return b + 2
  566.         def markHangingIndents(src):
  567.             r = ''
  568.             p = 0
  569.             while True:
  570.                 if p > len(src):
  571.                     return r
  572.                 n = src.find('\\t', p)
  573.                 if n == -1:
  574.                     r += src[p:]
  575.                     return r
  576.                 pc = findPrevStartofLine(src,p,n)
  577.                 if pc == n :
  578.                     # \t tag is at start of line so indent block will work
  579.                     end = src.find('\\t',n+2)
  580.                     if end == -1:
  581.                         end = n
  582.                     r += src[p:end+2]
  583.                     p = end + 2
  584.                 else :
  585.                     # \t tag not at start of line so hanging indent case
  586.                     # recode \t to pseudo \h tags and move it to start of this line
  587.                     # and recode its close as well
  588.                     r += src[p:pc] + '\\h' + src[pc:n]
  589.                     end = src.find('\\t',n+2)
  590.                     if end == -1:
  591.                         end = n+2
  592.                     r += src[n+2:end] + '\\h'
  593.                     p = end + 2
  594.         self.s = markHangingIndents(s)
  595.         # file(os.path.join("./pseudo.pml"), 'wb').write(self.s)
  596.         self.pos = 0
  597.         self.bkinfo = bkinfo
  598.     def nextOptAttr(self):
  599.         p = self.pos
  600.         if self.s[p:p+2] != '="':
  601.             return None
  602.         r = ''
  603.         p += 2
  604.         while self.s[p] != '"':
  605.             r += self.s[p]
  606.             p += 1
  607.         self.pos = p + 1
  608.         return r
  609.     def next(self):
  610.         p = self.pos
  611.         if p >= len(self.s):
  612.             return None
  613.         if self.s[p] != '\\':
  614.             res = self.s.find('\\', p)
  615.             if res == -1:
  616.                 res = len(self.s)
  617.             self.pos = res
  618.             return self.s[p : res], None, None
  619.         c = self.s[p+1]
  620.         # add in support for new pseudo tag \\h
  621.         if c in 'pxcriuovthnsblBk-lI\\d':
  622.             self.pos = p + 2
  623.             return None, c, None
  624.         if c in 'TwmqQ':
  625.             self.pos = p + 2
  626.             return None, c, self.nextOptAttr()
  627.         if c == 'a':
  628.             self.pos = p + 5
  629.             return None, c, int(self.s[p+2:p+5])
  630.         if c == 'U':
  631.             self.pos = p + 6
  632.             return None, c, int(self.s[p+2:p+6], 16)
  633.         c = self.s[p+1:p+1+2]
  634.         if c in ('X0','X1','X2','X3','X4','Sp','Sb'):
  635.             self.pos = p + 3
  636.             return None, c, None
  637.         if c in ('C0','C1','C2','C3','C4','Fn','Sd'):
  638.             self.pos = p + 3
  639.             return None, c, self.nextOptAttr()
  640.         print "unknown escape code %s" % c
  641.         self.pos = p + 1
  642.         return None, None, None
  643.     def LinePrinter(link):
  644.         return '<hr width="%s" />\n' % link
  645.     def LinkPrinter(link):
  646.         return '<a href="%s">' % link
  647.     def FootnoteLinkPrinter(link):
  648.         return '<a href="#footnote-%s">' % link
  649.     def SidebarLinkPrinter(link):
  650.         return '<a href="#sidebar-%s">' % link
  651.     def NotSupported(link):
  652.         raise NotImplemented()
  653.     def IndentPercent(link):
  654.         return '<span style="padding-left: %s%%;"></span>' %link
  655.     def NormalFont(link):
  656.         print "Nonfatal Error: NormalFont not implemented."
  657.         return '<!-- NormalFont %s -->' %link
  658.     def StdFont(link):
  659.         print "Nonfatal Error: StdFont not implemented."
  660.         return '<!-- StdFont: %s -->' %link
  661.    
  662.     # See http://wiki.mobileread.com/wiki/PML#Palm_Markup_Language
  663.     html_tags = {
  664.         'c' : ('<div class="center">', '</div>'),
  665.         'r' : ('<div class="right">', '</div>'),
  666.         'i' : ('<i>', '</i>'),
  667.         'u' : ('<span class="under">', '</span>'),
  668.         'b' : ('<strong>', '</strong>'),
  669.         'B' : ('<strong>', '</strong>'),
  670.         'o' : ('<del>', '</del>'),
  671.         'v' : ('<!-- ', ' -->'),
  672.         't' : ('<div class="indent">','</div>'),
  673.         'h' : ('<div class="hang">','</div>'), # pseudo-tag created to handle hanging indent cases
  674.         'Sb' : ('<sub>', '</sub>'),
  675.         'Sp' : ('<sup>', '</sup>'),
  676.         'X0' : ('<h1>', '</h1>'),
  677.         'X1' : ('<h2>', '</h2>'),
  678.         'X2' : ('<h3>', '</h3>'),
  679.         'X3' : ('<h4>', '</h4>'),
  680.         'X4' : ('<h5>', '</h5>'),
  681.         'l' : ('<span class="big">', '</span>'),
  682.         'q' : (LinkPrinter, '</a>'),
  683.         'Fn' : (FootnoteLinkPrinter, '</a>'),
  684.         'Sd' : (SidebarLinkPrinter, '</a>'),
  685.         'w' : (LinePrinter, ''),
  686.         #'m' : handled in if block,
  687.         #'Q' : handled in if block,
  688.         #'a' : handled in if block,
  689.         #'U' : handled in if block,
  690.         'x' : ('<h1 class="breakbefore">', '</h1>'),
  691.         #'C0' : handled in if block,
  692.         #'C1' : handled in if block,
  693.         #'C2' : handled in if block,
  694.         #'C3' : handled in if block,
  695.         #'C4' : handled in if block,
  696.         'T' : (IndentPercent, ''),
  697.         'n' : (NormalFont, ''),
  698.         's' : ('', ''),
  699.         'k' : ('<span class="small">', '</span>'),
  700.         'I' : ('<i>', '</i>'), # according to calibre - all ereader does is italicize the index entries
  701.     }
  702.     html_one_tags = {
  703.         'p' : '<p class="breakafter">&nbsp;</p>\n',
  704.         '\\': '\\',
  705.         '-' : '&shy;',
  706.     }
  707.     pml_chars = {
  708.         160 : '&nbsp;',130 : '&#8212;',131: '&#402;',132: '&#8222;',
  709.         133: '&#8230;',134: '&#8224;',135: '&#8225;',138: '&#352;',
  710.         139: '&#8249;',140: '&#338;',145: '&#8216;',146: '&#8217;',
  711.         147: '&#8220;',148: '&#8221;',149: '&#8226;',150: '&#8211;',
  712.         151: '&#8212;',153: '&#8482;',154: '&#353;',155: '&#8250;',
  713.         156: '&#339;',159: '&#376;'
  714.     }
  715.     def process(self):
  716.         final = '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">\n'
  717.         final += '<html>\n<head>\n<meta http-equiv="content-type" content="text/html; charset=windows-1252">\n'
  718.         if len(self.bkinfo) > 0:
  719.             title, author, copyright, publisher, isbn = self.bkinfo.split('\0',4)
  720.             isbn = isbn.strip('\0')
  721.             final += '<meta name="Title" content="%s"/>\n' % title
  722.             final += '<meta name="Author" content="%s"/>\n' % author
  723.             final += '<meta name="Copyright" content="%s"/>\n' % copyright
  724.             final += '<meta name="Publisher" content="%s"/>\n' % publisher
  725.             final += '<meta name="ISBN" content="%s"/>\n' % isbn
  726.             final += '<style type="text/css">\n'
  727.             final += 'div.center { text-align:center; }\n'
  728.             final += 'div.right { text-align:right; }\n'
  729.             final += 'div.indent { margin-left: 5%; }\n'
  730.             final += 'div.hang { text-indent: -5%; margin-left: 5%; }\n'
  731.             final += 'span.big { font-size: 175%; }\n'
  732.             final += 'span.small { font-size: 50%; }\n'
  733.             final += 'span.under { text-decoration: underline; }\n'
  734.             final += '.breakbefore { page-break-before: always; }\n'
  735.             final += '.breakafter { page-break-after: always; }\n'
  736.             final += '</style>\n'
  737.         final += '</head><body>\n'
  738.         in_tags = []
  739.         def makeText(s):
  740.             s = s.replace('&', '&amp;')
  741.             #s = s.replace('"', '&quot;')
  742.             s = s.replace('<', '&lt;')
  743.             s = s.replace('>', '&gt;')
  744.             s = s.replace('\n', '<br />\n')
  745.             return s
  746.         while True:
  747.             r = self.next()
  748.             if not r:
  749.                 break
  750.             text, cmd, attr = r
  751.             if text:
  752.                 final += makeText(text)
  753.             if cmd:
  754.                 def getTag(ti, end):
  755.                     cmd, attr = ti
  756.                     r = self.html_tags[cmd][end]
  757.                     if type(r) != str:
  758.                         r = r(attr)
  759.                     return r
  760.                 if cmd in self.html_tags:
  761.                     pair = (cmd, attr)
  762.                     if cmd not in [a for (a,b) in in_tags]:
  763.                         final += getTag(pair, False)
  764.                         in_tags.append(pair)
  765.                     else:
  766.                         j = len(in_tags)
  767.                         while True:
  768.                             j = j - 1
  769.                             final += getTag(in_tags[j], True)
  770.                             if in_tags[j][0] == cmd:
  771.                                 break
  772.                         del in_tags[j]
  773.                         while j < len(in_tags):
  774.                             final += getTag(in_tags[j], False)
  775.                             j = j + 1
  776.  
  777.                 if cmd in self.html_one_tags:
  778.                     final += self.html_one_tags[cmd]
  779.                 if cmd == 'm':
  780.                     unquotedimagepath = "images/" + attr
  781.                     imagepath = urllib.quote( unquotedimagepath )
  782.                     final += '<img src="%s" alt="">' % imagepath
  783.                 if cmd == 'Q':
  784.                     final += '<span id="%s"> </span>' % attr
  785.                 if cmd == 'C0':
  786.                     final += '<!-- ContentsList "%s" -->' % attr
  787.                 if cmd == 'C1':
  788.                     final += '<!-- ContentsList " %s" -->' % attr
  789.                 if cmd == 'C2':
  790.                     final += '<!-- ContentsList "  %s" -->' % attr
  791.                 if cmd == 'C3':
  792.                     final += '<!-- ContentsList "   %s" -->' % attr
  793.                 if cmd == 'C4':
  794.                     final += '<!-- ContentsList "    %s" -->' % attr
  795.                 if cmd == 'a':
  796.                     final += self.pml_chars.get(attr, '&#%d;' % attr)
  797.                 if cmd == 'U':
  798.                     final += '&#%d;' % attr
  799.         final += '</body></html>\n'
  800.         # while True:
  801.         #    s = final.replace('<br />\n<br />\n<br />\n', '<br />\n<br />\n')
  802.         #    if s == final:
  803.         #        break
  804.         #    final = s
  805.         s = final.replace('</div><br />','</div>\n')
  806.         final = s
  807.         return final
  808.  
  809. def convertEreaderToHtml(infile, name, cc, outdir):
  810.     if not os.path.exists(outdir):
  811.         os.makedirs(outdir)
  812.     sect = Sectionizer(infile, 'PNRdPPrs')
  813.     er = EreaderProcessor(sect.loadSection, name, cc)
  814.  
  815.     if er.getNumImages() > 0:
  816.         imagedir = "images/"
  817.         imagedirpath = os.path.join(outdir,imagedir)
  818.         if not os.path.exists(imagedirpath):
  819.             os.makedirs(imagedirpath)
  820.     for i in xrange(er.getNumImages()):
  821.         name, contents = er.getImage(i)
  822.         file(os.path.join(imagedirpath, name), 'wb').write(contents)
  823.  
  824.     pml_string = er.getText()
  825.     pmlfilename = bookname + ".pml"
  826.     file(os.path.join(outdir, pmlfilename),'wb').write(pml_string)
  827.  
  828.     bkinfo = er.getBookInfo()
  829.  
  830.     pml = PmlConverter(pml_string, bkinfo)
  831.     htmlfilename = bookname + ".html"
  832.     file(os.path.join(outdir, htmlfilename),'wb').write(pml.process())
  833.  
  834.     # ts = er.getExpandedTextSizesData()
  835.     # file(os.path.join(outdir, 'xtextsizes.dat'), 'wb').write(ts)
  836.  
  837.     cv = er.getChapterNamePMLOffsetData()
  838.     file(os.path.join(outdir, 'chapters.dat'), 'wb').write(cv)
  839.        
  840.     # lv = er.getLinkNamePMLOffsetData()
  841.     # file(os.path.join(outdir, 'links.dat'), 'wb').write(lv)
  842.  
  843.  
  844. def main(argv=None):
  845.     global bookname
  846.     if argv is None:
  847.         argv = sys.argv
  848.    
  849.     print "eReader2Html v%s. Copyright (c) 2008 The Dark Reverser" % __version__
  850.  
  851.     if len(argv)!=4 and len(argv)!=5:
  852.         print "Converts DRMed eReader books to PML Source and HTML"
  853.         print "Usage:"
  854.         print "  ereader2html infile.pdb [outdir] \"your name\" credit_card_number "
  855.         print "Note:"
  856.         print "  if ommitted, outdir defaults based on 'infile.pdb'"
  857.         print "  It's enough to enter the last 8 digits of the credit card number"
  858.     else:
  859.         if len(argv)==4:
  860.             infile, name, cc = argv[1], argv[2], argv[3]
  861.             outdir = infile[:-4] + '_Source'
  862.         elif len(argv)==5:
  863.             infile, outdir, name, cc = argv[1], argv[2], argv[3], argv[4]
  864.         bookname = os.path.splitext(os.path.basename(infile))[0]
  865.  
  866.         try:
  867.             print "Processing..."
  868.             import time
  869.             start_time = time.time()
  870.             convertEreaderToHtml(infile, name, cc, outdir)
  871.             end_time = time.time()
  872.             search_time = end_time - start_time
  873.             print 'elapsed time: %.2f seconds' % (search_time, )
  874.             print 'output in %s' % outdir
  875.             print "done"
  876.         except ValueError, e:
  877.             print "Error: %s" % e
  878.  
  879. if __name__ == "__main__":
  880.     #import cProfile
  881.     #command = """sys.exit(main())"""
  882.     #cProfile.runctx( command, globals(), locals(), filename="cprofile.profile" )
  883.    
  884.     sys.exit(main())
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