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First patch to mobidedrm

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Paul Durrant 2008-06-22 13:35:18 +01:00 committed by Apprentice Alf
parent d09223598a
commit e6edf3e370
1 changed files with 9 additions and 6 deletions
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13
Kindle_Mobi_Tools/lib/mobidedrm.py
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@ -4,6 +4,7 @@
# Changelog # Changelog
# 0.01 - Initial version # 0.01 - Initial version
# 0.02 - Huffdic compressed books were not properly decrypted # 0.02 - Huffdic compressed books were not properly decrypted
# 0.03 - fix 0.02 to work with all Mobipocket eBooks
import sys,struct,binascii import sys,struct,binascii
@ -60,6 +61,8 @@ def checksumPid(s):
def getSizeOfTrailingDataEntries(ptr, size, flags): def getSizeOfTrailingDataEntries(ptr, size, flags):
def getSizeOfTrailingDataEntry(ptr, size): def getSizeOfTrailingDataEntry(ptr, size):
bitpos, result = 0, 0 bitpos, result = 0, 0
if size <= 0:
return result
while True: while True:
v = ord(ptr[size-1]) v = ord(ptr[size-1])
result |= (v & 0x7F) << bitpos result |= (v & 0x7F) << bitpos
@ -69,10 +72,10 @@ def getSizeOfTrailingDataEntries(ptr, size, flags):
return result return result
num = 0 num = 0
flags >>= 1 flags >>= 1
while flags: # while flags:
if flags & 1: if flags & 1:
num += getSizeOfTrailingDataEntry(ptr, size - num) num += getSizeOfTrailingDataEntry(ptr, size - num)
flags >>= 1 flags >>= 1
return num return num
@ -162,7 +165,7 @@ class DrmStripper:
def getResult(self): def getResult(self):
return self.data_file return self.data_file
print "MobiDeDrm v0.02. Copyright (c) 2008 The Dark Reverser" print "MobiDeDrm v0.03. Copyright (c) 2008 The Dark Reverser"
if len(sys.argv)<4: if len(sys.argv)<4:
print "Removes protection from Mobipocket books" print "Removes protection from Mobipocket books"
print "Usage:" print "Usage:"