mobidedrm 0.15
This commit is contained in:
Apprentice Alf
parent
37696e1495
commit
6c70a073d9
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@ -37,8 +37,9 @@
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# in utf8 file are encrypted. (Although neither kind gets compressed.)
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# This knowledge leads to a simplification of the test for the
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# trailing data byte flags - version 5 and higher AND header size >= 0xE4.
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# 0.15 - Now outputs 'hearbeat', and is also quicker for long files.
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__version__ = '0.14'
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__version__ = '0.15'
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import sys
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import struct
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@ -196,8 +197,7 @@ class DrmStripper:
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mobi_length, = struct.unpack('>L',sect[0x14:0x18])
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mobi_version, = struct.unpack('>L',sect[0x68:0x6C])
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extra_data_flags = 0
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print "MOBI header length = %d" %mobi_length
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print "MOBI header version = %d" %mobi_version
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print "MOBI header version = %d, length = %d" %(mobi_version, mobi_length)
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if (mobi_length >= 0xE4) and (mobi_version >= 5):
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extra_data_flags, = struct.unpack('>H', sect[0xF2:0xF4])
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print "Extra Data Flags = %d" %extra_data_flags
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@ -227,13 +227,22 @@ class DrmStripper:
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self.patchSection(0, "\0" * 2, 0xC)
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# decrypt sections
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print "Decrypting. Please wait...",
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print "Decrypting. Please wait . . .",
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new_data = self.data_file[:self.sections[1][0]]
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for i in xrange(1, records+1):
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data = self.loadSection(i)
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extra_size = getSizeOfTrailingDataEntries(data, len(data), extra_data_flags)
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if i%100 == 0:
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print ".",
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# print "record %d, extra_size %d" %(i,extra_size)
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self.patchSection(i, PC1(found_key, data[0:len(data) - extra_size]))
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print "done"
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new_data += PC1(found_key, data[0:len(data) - extra_size])
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if extra_size > 0:
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new_data += data[-extra_size:]
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#self.patchSection(i, PC1(found_key, data[0:len(data) - extra_size]))
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if self.num_sections > records+1:
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new_data += self.data_file[self.sections[records+1][0]:]
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self.data_file = new_data
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print "done."
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def getResult(self):
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return self.data_file
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@ -246,7 +255,7 @@ if not __name__ == "__main__":
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description = 'Removes DRM from secure Mobi files'
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supported_platforms = ['linux', 'osx', 'windows'] # Platforms this plugin will run on
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author = 'The Dark Reverser' # The author of this plugin
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version = (0, 1, 4) # The version number of this plugin
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version = (0, 1, 5) # The version number of this plugin
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file_types = set(['prc','mobi','azw']) # The file types that this plugin will be applied to
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on_import = True # Run this plugin during the import
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@ -37,8 +37,9 @@
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# in utf8 file are encrypted. (Although neither kind gets compressed.)
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# This knowledge leads to a simplification of the test for the
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# trailing data byte flags - version 5 and higher AND header size >= 0xE4.
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# 0.15 - Now outputs 'hearbeat', and is also quicker for long files.
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__version__ = '0.14'
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__version__ = '0.15'
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import sys
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import struct
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@ -196,8 +197,7 @@ class DrmStripper:
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mobi_length, = struct.unpack('>L',sect[0x14:0x18])
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mobi_version, = struct.unpack('>L',sect[0x68:0x6C])
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extra_data_flags = 0
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print "MOBI header length = %d" %mobi_length
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print "MOBI header version = %d" %mobi_version
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print "MOBI header version = %d, length = %d" %(mobi_version, mobi_length)
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if (mobi_length >= 0xE4) and (mobi_version >= 5):
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extra_data_flags, = struct.unpack('>H', sect[0xF2:0xF4])
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print "Extra Data Flags = %d" %extra_data_flags
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@ -227,13 +227,22 @@ class DrmStripper:
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self.patchSection(0, "\0" * 2, 0xC)
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# decrypt sections
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print "Decrypting. Please wait...",
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print "Decrypting. Please wait . . .",
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new_data = self.data_file[:self.sections[1][0]]
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for i in xrange(1, records+1):
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data = self.loadSection(i)
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extra_size = getSizeOfTrailingDataEntries(data, len(data), extra_data_flags)
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if i%100 == 0:
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print ".",
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# print "record %d, extra_size %d" %(i,extra_size)
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self.patchSection(i, PC1(found_key, data[0:len(data) - extra_size]))
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print "done"
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new_data += PC1(found_key, data[0:len(data) - extra_size])
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if extra_size > 0:
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new_data += data[-extra_size:]
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#self.patchSection(i, PC1(found_key, data[0:len(data) - extra_size]))
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if self.num_sections > records+1:
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new_data += self.data_file[self.sections[records+1][0]:]
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self.data_file = new_data
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print "done."
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def getResult(self):
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return self.data_file
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@ -246,7 +255,7 @@ if not __name__ == "__main__":
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description = 'Removes DRM from secure Mobi files'
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supported_platforms = ['linux', 'osx', 'windows'] # Platforms this plugin will run on
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author = 'The Dark Reverser' # The author of this plugin
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version = (0, 1, 4) # The version number of this plugin
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version = (0, 1, 5) # The version number of this plugin
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file_types = set(['prc','mobi','azw']) # The file types that this plugin will be applied to
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on_import = True # Run this plugin during the import
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@ -21,13 +21,43 @@
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# 0.07 - The extra data flags aren't present in MOBI header < 0xE8 in size
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# 0.08 - ...and also not in Mobi header version < 6
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# 0.09 - ...but they are there with Mobi header version 6, header size 0xE4!
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# 0.10 - Outputs unencrypted files as-is, so that when run as a Calibre
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# import filter it works when importing unencrypted files.
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# Also now handles encrypted files that don't need a specific PID.
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# 0.11 - use autoflushed stdout and proper return values
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# 0.12 - Fix for problems with metadata import as Calibre plugin, report errors
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# 0.13 - Formatting fixes: retabbed file, removed trailing whitespace
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# and extra blank lines, converted CR/LF pairs at ends of each line,
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# and other cosmetic fixes.
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# 0.14 - Working out when the extra data flags are present has been problematic
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# Versions 7 through 9 have tried to tweak the conditions, but have been
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# only partially successful. Closer examination of lots of sample
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# files reveals that a confusin has arisen because trailing data entries
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# are not encrypted, but it turns out that the multibyte entries
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# in utf8 file are encrypted. (Although neither kind gets compressed.)
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# This knowledge leads to a simplification of the test for the
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# trailing data byte flags - version 5 and higher AND header size >= 0xE4.
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# 0.15 - Now outputs 'hearbeat', and is also quicker for long files.
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import sys,struct,binascii
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__version__ = '0.15'
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import sys
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import struct
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import binascii
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class Unbuffered:
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def __init__(self, stream):
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self.stream = stream
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def write(self, data):
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self.stream.write(data)
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self.stream.flush()
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def __getattr__(self, attr):
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return getattr(self.stream, attr)
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class DrmException(Exception):
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pass
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pass
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#implementation of Pukall Cipher 1
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# Implementation of Pukall Cipher 1
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def PC1(key, src, decryption=True):
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sum1 = 0;
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sum2 = 0;
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@ -62,188 +92,218 @@ def PC1(key, src, decryption=True):
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return dst
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def checksumPid(s):
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letters = "ABCDEFGHIJKLMNPQRSTUVWXYZ123456789"
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crc = (~binascii.crc32(s,-1))&0xFFFFFFFF
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crc = crc ^ (crc >> 16)
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res = s
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l = len(letters)
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for i in (0,1):
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b = crc & 0xff
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pos = (b // l) ^ (b % l)
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res += letters[pos%l]
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crc >>= 8
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return res
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letters = "ABCDEFGHIJKLMNPQRSTUVWXYZ123456789"
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crc = (~binascii.crc32(s,-1))&0xFFFFFFFF
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crc = crc ^ (crc >> 16)
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res = s
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l = len(letters)
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for i in (0,1):
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b = crc & 0xff
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pos = (b // l) ^ (b % l)
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res += letters[pos%l]
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crc >>= 8
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return res
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def getSizeOfTrailingDataEntries(ptr, size, flags):
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def getSizeOfTrailingDataEntry(ptr, size):
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bitpos, result = 0, 0
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if size <= 0:
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return result
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while True:
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v = ord(ptr[size-1])
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result |= (v & 0x7F) << bitpos
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bitpos += 7
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size -= 1
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if (v & 0x80) != 0 or (bitpos >= 28) or (size == 0):
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return result
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num = 0
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testflags = flags >> 1
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while testflags:
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if testflags & 1:
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num += getSizeOfTrailingDataEntry(ptr, size - num)
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testflags >>= 1
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if flags & 1:
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num += (ord(ptr[size - num - 1]) & 0x3) + 1
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return num
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def getSizeOfTrailingDataEntry(ptr, size):
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bitpos, result = 0, 0
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if size <= 0:
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return result
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while True:
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v = ord(ptr[size-1])
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result |= (v & 0x7F) << bitpos
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bitpos += 7
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size -= 1
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if (v & 0x80) != 0 or (bitpos >= 28) or (size == 0):
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return result
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num = 0
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testflags = flags >> 1
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while testflags:
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if testflags & 1:
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num += getSizeOfTrailingDataEntry(ptr, size - num)
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testflags >>= 1
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# Multibyte data, if present, is included in the encryption, so
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# we do not need to check the low bit.
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# if flags & 1:
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# num += (ord(ptr[size - num - 1]) & 0x3) + 1
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return num
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class DrmStripper:
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def loadSection(self, section):
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if (section + 1 == self.num_sections):
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endoff = len(self.data_file)
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else:
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endoff = self.sections[section + 1][0]
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off = self.sections[section][0]
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return self.data_file[off:endoff]
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def loadSection(self, section):
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if (section + 1 == self.num_sections):
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endoff = len(self.data_file)
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else:
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endoff = self.sections[section + 1][0]
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off = self.sections[section][0]
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return self.data_file[off:endoff]
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def patch(self, off, new):
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self.data_file = self.data_file[:off] + new + self.data_file[off+len(new):]
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def patch(self, off, new):
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self.data_file = self.data_file[:off] + new + self.data_file[off+len(new):]
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def patchSection(self, section, new, in_off = 0):
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if (section + 1 == self.num_sections):
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endoff = len(self.data_file)
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else:
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endoff = self.sections[section + 1][0]
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off = self.sections[section][0]
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assert off + in_off + len(new) <= endoff
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self.patch(off + in_off, new)
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def patchSection(self, section, new, in_off = 0):
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if (section + 1 == self.num_sections):
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endoff = len(self.data_file)
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else:
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endoff = self.sections[section + 1][0]
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off = self.sections[section][0]
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assert off + in_off + len(new) <= endoff
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self.patch(off + in_off, new)
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def parseDRM(self, data, count, pid):
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pid = pid.ljust(16,'\0')
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keyvec1 = "\x72\x38\x33\xB0\xB4\xF2\xE3\xCA\xDF\x09\x01\xD6\xE2\xE0\x3F\x96"
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temp_key = PC1(keyvec1, pid, False)
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temp_key_sum = sum(map(ord,temp_key)) & 0xff
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found_key = None
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for i in xrange(count):
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verification, size, type, cksum, cookie = struct.unpack('>LLLBxxx32s', data[i*0x30:i*0x30+0x30])
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cookie = PC1(temp_key, cookie)
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ver,flags,finalkey,expiry,expiry2 = struct.unpack('>LL16sLL', cookie)
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if verification == ver and cksum == temp_key_sum and (flags & 0x1F) == 1:
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found_key = finalkey
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break
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return found_key
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def parseDRM(self, data, count, pid):
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pid = pid.ljust(16,'\0')
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keyvec1 = "\x72\x38\x33\xB0\xB4\xF2\xE3\xCA\xDF\x09\x01\xD6\xE2\xE0\x3F\x96"
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temp_key = PC1(keyvec1, pid, False)
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temp_key_sum = sum(map(ord,temp_key)) & 0xff
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found_key = None
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for i in xrange(count):
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verification, size, type, cksum, cookie = struct.unpack('>LLLBxxx32s', data[i*0x30:i*0x30+0x30])
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cookie = PC1(temp_key, cookie)
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ver,flags,finalkey,expiry,expiry2 = struct.unpack('>LL16sLL', cookie)
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if verification == ver and cksum == temp_key_sum and (flags & 0x1F) == 1:
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found_key = finalkey
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break
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if not found_key:
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# Then try the default encoding that doesn't require a PID
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temp_key = keyvec1
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temp_key_sum = sum(map(ord,temp_key)) & 0xff
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for i in xrange(count):
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verification, size, type, cksum, cookie = struct.unpack('>LLLBxxx32s', data[i*0x30:i*0x30+0x30])
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cookie = PC1(temp_key, cookie)
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ver,flags,finalkey,expiry,expiry2 = struct.unpack('>LL16sLL', cookie)
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if verification == ver and cksum == temp_key_sum:
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found_key = finalkey
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break
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return found_key
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def __init__(self, data_file, pid):
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if checksumPid(pid[0:-2]) != pid:
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raise DrmException("invalid PID checksum")
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pid = pid[0:-2]
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def __init__(self, data_file, pid):
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self.data_file = data_file
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header = data_file[0:72]
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if header[0x3C:0x3C+8] != 'BOOKMOBI':
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raise DrmException("invalid file format")
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self.num_sections, = struct.unpack('>H', data_file[76:78])
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if checksumPid(pid[0:-2]) != pid:
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raise DrmException("invalid PID checksum")
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pid = pid[0:-2]
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self.data_file = data_file
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header = data_file[0:72]
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if header[0x3C:0x3C+8] != 'BOOKMOBI':
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raise DrmException("invalid file format")
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self.num_sections, = struct.unpack('>H', data_file[76:78])
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self.sections = []
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for i in xrange(self.num_sections):
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offset, a1,a2,a3,a4 = struct.unpack('>LBBBB', data_file[78+i*8:78+i*8+8])
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flags, val = a1, a2<<16|a3<<8|a4
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self.sections.append( (offset, flags, val) )
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self.sections = []
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for i in xrange(self.num_sections):
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offset, a1,a2,a3,a4 = struct.unpack('>LBBBB', data_file[78+i*8:78+i*8+8])
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flags, val = a1, a2<<16|a3<<8|a4
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self.sections.append( (offset, flags, val) )
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sect = self.loadSection(0)
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records, = struct.unpack('>H', sect[0x8:0x8+2])
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mobi_length, = struct.unpack('>L',sect[0x14:0x18])
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mobi_version, = struct.unpack('>L',sect[0x68:0x6C])
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extra_data_flags = 0
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print "MOBI header version = %d, length = %d" %(mobi_version, mobi_length)
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if (mobi_length >= 0xE4) and (mobi_version >= 5):
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extra_data_flags, = struct.unpack('>H', sect[0xF2:0xF4])
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print "Extra Data Flags = %d" %extra_data_flags
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sect = self.loadSection(0)
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records, = struct.unpack('>H', sect[0x8:0x8+2])
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mobi_length, = struct.unpack('>L',sect[0x14:0x18])
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mobi_version, = struct.unpack('>L',sect[0x68:0x6C])
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extra_data_flags = 0
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print "MOBI header length = %d" %mobi_length
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print "MOBI header version = %d" %mobi_version
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if (mobi_length >= 0xE4) and (mobi_version > 5):
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extra_data_flags, = struct.unpack('>H', sect[0xF2:0xF4])
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print "Extra Data Flags = %d" %extra_data_flags
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crypto_type, = struct.unpack('>H', sect[0xC:0xC+2])
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if crypto_type == 0:
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print "This book is not encrypted."
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else:
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if crypto_type == 1:
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raise DrmException("cannot decode Mobipocket encryption type 1")
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if crypto_type != 2:
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raise DrmException("unknown encryption type: %d" % crypto_type)
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# calculate the keys
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drm_ptr, drm_count, drm_size, drm_flags = struct.unpack('>LLLL', sect[0xA8:0xA8+16])
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if drm_count == 0:
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raise DrmException("no PIDs found in this file")
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found_key = self.parseDRM(sect[drm_ptr:drm_ptr+drm_size], drm_count, pid)
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if not found_key:
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raise DrmException("no key found. maybe the PID is incorrect")
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crypto_type, = struct.unpack('>H', sect[0xC:0xC+2])
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if crypto_type == 0:
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raise DrmException("it seems that this book isn't encrypted")
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if crypto_type == 1:
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raise DrmException("cannot decode Mobipocket encryption type 1")
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if crypto_type != 2:
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raise DrmException("unknown encryption type: %d" % crypto_type)
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# kill the drm keys
|
||||
self.patchSection(0, "\0" * drm_size, drm_ptr)
|
||||
# kill the drm pointers
|
||||
self.patchSection(0, "\xff" * 4 + "\0" * 12, 0xA8)
|
||||
# clear the crypto type
|
||||
self.patchSection(0, "\0" * 2, 0xC)
|
||||
|
||||
# calculate the keys
|
||||
drm_ptr, drm_count, drm_size, drm_flags = struct.unpack('>LLLL', sect[0xA8:0xA8+16])
|
||||
if drm_count == 0:
|
||||
raise DrmException("no PIDs found in this file")
|
||||
found_key = self.parseDRM(sect[drm_ptr:drm_ptr+drm_size], drm_count, pid)
|
||||
if not found_key:
|
||||
raise DrmException("no key found. maybe the PID is incorrect")
|
||||
# decrypt sections
|
||||
print "Decrypting. Please wait . . .",
|
||||
new_data = self.data_file[:self.sections[1][0]]
|
||||
for i in xrange(1, records+1):
|
||||
data = self.loadSection(i)
|
||||
extra_size = getSizeOfTrailingDataEntries(data, len(data), extra_data_flags)
|
||||
if i%100 == 0:
|
||||
print ".",
|
||||
# print "record %d, extra_size %d" %(i,extra_size)
|
||||
new_data += PC1(found_key, data[0:len(data) - extra_size])
|
||||
if extra_size > 0:
|
||||
new_data += data[-extra_size:]
|
||||
#self.patchSection(i, PC1(found_key, data[0:len(data) - extra_size]))
|
||||
if self.num_sections > records+1:
|
||||
new_data += self.data_file[self.sections[records+1][0]:]
|
||||
self.data_file = new_data
|
||||
print "done."
|
||||
|
||||
# kill the drm keys
|
||||
self.patchSection(0, "\0" * drm_size, drm_ptr)
|
||||
# kill the drm pointers
|
||||
self.patchSection(0, "\xff" * 4 + "\0" * 12, 0xA8)
|
||||
# clear the crypto type
|
||||
self.patchSection(0, "\0" * 2, 0xC)
|
||||
|
||||
# decrypt sections
|
||||
print "Decrypting. Please wait...",
|
||||
for i in xrange(1, records+1):
|
||||
data = self.loadSection(i)
|
||||
extra_size = getSizeOfTrailingDataEntries(data, len(data), extra_data_flags)
|
||||
# print "record %d, extra_size %d" %(i,extra_size)
|
||||
self.patchSection(i, PC1(found_key, data[0:len(data) - extra_size]))
|
||||
print "done"
|
||||
def getResult(self):
|
||||
return self.data_file
|
||||
def getResult(self):
|
||||
return self.data_file
|
||||
|
||||
if not __name__ == "__main__":
|
||||
from calibre.customize import FileTypePlugin
|
||||
from calibre.customize import FileTypePlugin
|
||||
|
||||
class MobiDeDRM(FileTypePlugin):
|
||||
class MobiDeDRM(FileTypePlugin):
|
||||
name = 'MobiDeDRM' # Name of the plugin
|
||||
description = 'Removes DRM from secure Mobi files'
|
||||
supported_platforms = ['linux', 'osx', 'windows'] # Platforms this plugin will run on
|
||||
author = 'The Dark Reverser' # The author of this plugin
|
||||
version = (0, 1, 5) # The version number of this plugin
|
||||
file_types = set(['prc','mobi','azw']) # The file types that this plugin will be applied to
|
||||
on_import = True # Run this plugin during the import
|
||||
|
||||
name = 'MobiDeDRM' # Name of the plugin
|
||||
description = 'Removes DRM from secure Mobi files'
|
||||
supported_platforms = ['linux', 'osx', 'windows'] # Platforms this plugin will run on
|
||||
author = 'The Dark Reverser' # The author of this plugin
|
||||
version = (0, 0, 9) # The version number of this plugin
|
||||
file_types = set(['prc','mobi','azw']) # The file types that this plugin will be applied to
|
||||
on_import = True # Run this plugin during the import
|
||||
def run(self, path_to_ebook):
|
||||
from calibre.gui2 import is_ok_to_use_qt
|
||||
from PyQt4.Qt import QMessageBox
|
||||
PID = self.site_customization
|
||||
data_file = file(path_to_ebook, 'rb').read()
|
||||
ar = PID.split(',')
|
||||
for i in ar:
|
||||
try:
|
||||
unlocked_file = DrmStripper(data_file, i).getResult()
|
||||
except DrmException:
|
||||
# ignore the error
|
||||
pass
|
||||
else:
|
||||
of = self.temporary_file('.mobi')
|
||||
of.write(unlocked_file)
|
||||
of.close()
|
||||
return of.name
|
||||
if is_ok_to_use_qt():
|
||||
d = QMessageBox(QMessageBox.Warning, "MobiDeDRM Plugin", "Couldn't decode: %s\n\nImporting encrypted version." % path_to_ebook)
|
||||
d.show()
|
||||
d.raise_()
|
||||
d.exec_()
|
||||
return path_to_ebook
|
||||
|
||||
|
||||
def run(self, path_to_ebook):
|
||||
of = self.temporary_file('.mobi')
|
||||
PID = self.site_customization
|
||||
data_file = file(path_to_ebook, 'rb').read()
|
||||
ar = PID.split(',')
|
||||
for i in ar:
|
||||
try:
|
||||
file(of.name, 'wb').write(DrmStripper(data_file, i).getResult())
|
||||
except DrmException:
|
||||
# Hm, we should display an error dialog here.
|
||||
# Dunno how though.
|
||||
# Ignore the dirty hack behind the curtain.
|
||||
# strexcept = 'echo exception: %s > /dev/tty' % e
|
||||
# subprocess.call(strexcept,shell=True)
|
||||
print i + ": not PID for book"
|
||||
else:
|
||||
return of.name
|
||||
|
||||
def customization_help(self, gui=False):
|
||||
return 'Enter PID (separate multiple PIDs with comma)'
|
||||
def customization_help(self, gui=False):
|
||||
return 'Enter PID (separate multiple PIDs with comma)'
|
||||
|
||||
if __name__ == "__main__":
|
||||
print "MobiDeDrm v0.09. Copyright (c) 2008 The Dark Reverser"
|
||||
if len(sys.argv)<4:
|
||||
print "Removes protection from Mobipocket books"
|
||||
print "Usage:"
|
||||
print " mobidedrm infile.mobi outfile.mobi PID"
|
||||
else:
|
||||
infile = sys.argv[1]
|
||||
outfile = sys.argv[2]
|
||||
pid = sys.argv[3]
|
||||
data_file = file(infile, 'rb').read()
|
||||
try:
|
||||
file(outfile, 'wb').write(DrmStripper(data_file, pid).getResult())
|
||||
except DrmException, e:
|
||||
print "Error: %s" % e
|
||||
sys.stdout=Unbuffered(sys.stdout)
|
||||
print ('MobiDeDrm v%(__version__)s. '
|
||||
'Copyright 2008-2010 The Dark Reverser.' % globals())
|
||||
if len(sys.argv)<4:
|
||||
print "Removes protection from Mobipocket books"
|
||||
print "Usage:"
|
||||
print " %s <infile> <outfile> <PID>" % sys.argv[0]
|
||||
sys.exit(1)
|
||||
else:
|
||||
infile = sys.argv[1]
|
||||
outfile = sys.argv[2]
|
||||
pid = sys.argv[3]
|
||||
data_file = file(infile, 'rb').read()
|
||||
try:
|
||||
strippedFile = DrmStripper(data_file, pid)
|
||||
file(outfile, 'wb').write(strippedFile.getResult())
|
||||
except DrmException, e:
|
||||
print "Error: %s" % e
|
||||
sys.exit(1)
|
||||
sys.exit(0)
|
||||
Loading…
Reference in New Issue